JP2011227721A - Interest extraction device, interest extraction method, and interest extraction program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To extract the object of interest of a user by using the history of the various behaviors of the user.SOLUTION: An interest object determination part 131 is configured to determine whether or not a user is interested in an object of interest based on behavior history information showing the history of the behavior of the user with respect to the object of interest stored in a behavior history storage part 120 and extraction conditions for determining whether or not the user is interested in the object of interest stored in an extraction setting storage part 132.

Description

  The present invention relates to an interest extraction device, an interest extraction method, and an interest extraction program that extract presence / absence of interest in content data, products, and the like from a user's behavior history.

  Using the user's attributes, past action history, etc., extract the interests that the user is interested in (for example, content such as documents, images, video, audio, etc., or products), and the extracted interests There is a recommendation system that recommends other objects of interest that a user may be interested in based on information about the objects.

  Examples of such a recommendation system are disclosed in Patent Documents 1 and 2.

  The content viewing device described in Patent Literature 1 calculates a preference value for content based on a user's content viewing history, and calculates recommendation information based on the preference value.

  The information search system described in Patent Literature 2 generates integrated interest data based on preference information in a plurality of information processing devices, and recommends content.

  As a related technique, Patent Literature 3 discloses a content specifying device that extracts content that matches a user's interest without specifying a search word based on the user's access history.

  As another related technique, Patent Document 4 classifies users into a plurality of user types based on the user's access history to content, and based on the history of content accessed by users of the classified user type. A content providing apparatus that provides content information is disclosed.

  Furthermore, as another related technique, Patent Document 5 discloses a data extraction method for extracting data from received data in accordance with data extraction conditions in a basic system.

JP 2009-118189 A JP 2004-355109 A JP 2007-256992 A JP 2008-299542 A JP-A-01-004830

  In the above-described recommendation system, various types of history data may be acquired as the user's behavior history. For example, as an action history, a history of purchasing an interest object, a history of viewing the interest object, a history of accessing content data described about the interest object, a history of bookmarking content data described about the interest object, and the like can be acquired.

  However, since the recommendation system described in Patent Document 1 and Patent Document 2 described above determines whether or not the user is interested in each object of interest based on the fixed condition, such different types of history data are used. Depending on the purpose of recommending the object of interest or the acquisition status of the action history, it cannot be properly used.

  One object of the present invention provides an interest extraction device, an interest extraction method, and an interest extraction program capable of solving the above-described problems and extracting a user's interests using various types of user's behavior histories. There is.

  The interest extraction apparatus according to the present invention includes an action history storage unit that stores action history information indicating a history of a user's action on an object of interest, and the user is interested in the object of interest based on the action history information. Based on the extraction setting storage unit that stores the extraction condition for determining whether or not the user has the behavior history information in the behavior history storage unit and the extraction condition in the extraction setting storage unit, the user is interested in An interest object determination unit that determines whether or not the user has an interest in.

  The interest extraction method according to the present invention includes behavior history information indicating a history of a user's behavior with respect to a target of interest stored in the behavior history storage unit, and the user stored in the extraction setting storage unit with respect to the target of interest. Whether or not the user is interested in the object of interest is determined based on an extraction condition for determining whether or not the user is interested.

  The interest extraction program of the present invention is a computer that stores, in a computer, behavior history information indicating a history of a user's behavior with respect to a target of interest stored in a behavior history storage unit, and the user stored in an extraction setting storage unit Based on the extraction condition for determining whether or not the user is interested, the process for determining whether or not the user is interested in the object of interest is executed.

  The effect of this invention is that a user's interest object can be extracted using various types of action history.

It is a block diagram which shows the characteristic structure of 1st embodiment of this invention. It is a block diagram which shows the structure of the recommendation system 100 in 1st embodiment of this invention. It is a flowchart which shows operation | movement of the recommendation system 100 in 1st embodiment of this invention. It is a figure which shows the example of the action history information in 1st embodiment of this invention. It is a figure which shows the example of the extraction condition template in 1st embodiment of this invention. It is a figure which shows the example of the extraction condition information in 1st embodiment of this invention. It is a figure which shows the other example of the extraction condition information in 1st embodiment of this invention. It is a figure which shows the example of the determination result by the interested object determination part 131 in 1st embodiment of this invention. It is a figure which shows the example of the interest information in 1st embodiment of this invention. It is a figure which shows the example of the relevant information in 1st embodiment of this invention. It is a figure which shows the example of the recommendation result in 1st embodiment of this invention. It is a block diagram which shows the structure of the recommendation system 100 in 2nd embodiment of this invention. It is a flowchart which shows operation | movement of the recommendation system 100 in 2nd embodiment of this invention. It is a figure which shows the example of the determination result by the interested object determination part 131a in 2nd embodiment of this invention. It is a figure which shows the example of the determination result by the interested object determination part 131b in 2nd embodiment of this invention. It is a figure which shows the example of the extraction condition information in 2nd embodiment of this invention. It is a figure which shows the example of the aggregation setting information in 2nd embodiment of this invention. It is a figure which shows the example of the sampling result with respect to the determination result by the interested object determination part 131a in 2nd embodiment of this invention. It is a figure which shows the example of the sampling result with respect to the determination result by the interested object determination part 131b in 2nd embodiment of this invention. It is a figure which shows the example of the aggregation result which aggregated the sampling result in 2nd embodiment of this invention. It is a figure which shows the example of the interest information in 2nd embodiment of this invention. It is a figure which shows the example of the relevant information in 2nd embodiment of this invention.

(First embodiment)
Next, a first embodiment of the present invention will be described in detail with reference to the drawings.

  First, the configuration of the first embodiment of the present invention will be described. FIG. 2 is a block diagram showing the configuration of the recommendation system 100 in the first embodiment of the present invention.

  Referring to FIG. 2, a recommendation system 100 according to the first embodiment of the present invention includes an action history receiving unit 110, an action history storage unit 120, an interest extraction unit 130, an interest information storage unit 140, an interest target recommendation unit 150, A recommendation result storage unit 160 and a recommendation result evaluation unit 170 are included.

  The recommendation system 100 may be a computer that includes a CPU (Central Control Unit) and a storage medium that stores a program, and that operates by control based on the program. In addition, the action history storage unit 120, the extraction setting storage unit 132, the interest information storage unit 140, the related model storage unit 152, and the recommendation result storage unit 160 may be configured as individual storage media or a single storage medium. Good.

  Moreover, you may comprise one apparatus by each of each component of the recommendation system 100 in 1st embodiment of this invention, or some of these. For example, the interest extraction unit 130 may constitute an interest extraction device.

  The action history receiving unit 110 receives user action history information from a user terminal used by the user or a server device accessed by the user via the communication network, and stores it in the action history storage unit 120.

  FIG. 4 is a diagram showing an example of action history information according to the first embodiment of the present invention. The action history information includes the date and time when the action on the object of interest was performed by the user, the interest object identifier (A, B, C...) That identifies the object of interest on which the action was performed, and the action type (purchasing and browsing). Etc.).

  Here, the action type “purchase” indicates that the user has accessed the server device that sells the interest object indicated by the interest object identifier from the user terminal and has purchased the interest object. Also, the action type “browsing” indicates that the user has acquired and browsed predetermined content data described about the target of interest indicated by the target of interest identifier from the server device in the user terminal.

  It is assumed that the date and time, the interest identifier, and the action type included in the action history information can be detected by the user terminal or the server device.

  In addition, action history information shall be preserve | saved for every user identifier (User 1, User 2, ...) which identifies a user.

  The interest extraction unit 130 receives the action history information stored in the action history storage unit 120 as an input, extracts an interest object in which the user is interested, and stores it as interest information in the interest information storage unit 140.

  FIG. 9 is a diagram showing an example of interest information in the first embodiment of the present invention. The interest information includes the user identifier of the user and the interest identifier of the interest determined that each user is interested.

  The interest extraction unit 130 includes an interest target determination unit 131, an extraction setting storage unit 132, and an extraction condition setting unit 133.

  Here, the interest determination unit 131 determines whether the user is interested in each interest included in the action history information based on the extraction condition stored in the extraction setting storage unit 132 (the user is set as the interest). It is determined based on a hypothesis for determining that the user is interested. The extraction condition is specified by a predetermined action performed by the user on the object of interest. Here, the extraction conditions are represented by parameters of the extraction condition template.

  FIG. 5 is a diagram showing an example of the extraction condition template in the first embodiment of the present invention. In the example of FIG. 5, the parameters include “action X” (predetermined action), “time R”, “number of times N”, and “action Y” (predetermined action).

  6 and 7 are diagrams showing examples of extraction condition information in the first embodiment of the present invention. The extraction condition information includes an extraction condition identifier for identifying the extraction condition, and a setting value of each parameter of the extraction condition template for each extraction condition. In the example of FIG. 6, the extraction condition with the extraction condition identifier “condition 1” includes “behavior X = arbitrary action”, “time R = arbitrary time”, “number of times N = 1”, and “action Y = "Purchase" is set. This indicates that "when an object of interest is purchased, it is determined that the object of interest is interested". In the example of FIG. 7, the extraction condition with the extraction condition identifier “condition 2” includes “action X = any action”, “time R = 1 hour”, “number of times N = 2 times”, and “action Y”. = Browsing is set. This indicates that “if the content data described in the object of interest is viewed twice or more in one hour, it is determined that the object of interest is interested”.

  The extraction setting unit 133 receives an input of an extraction condition used in the object-of-interest determination unit 131 from the administrator, and stores it in the extraction setting storage unit 132 as extraction condition information.

  Based on the interest information stored in the interest information storage unit 140, the interest target recommendation unit 150 provides the user with recommended information including an interest target that the user may be interested in.

  The interest target recommendation unit 150 includes a relevance analysis unit 151, a related model storage unit 152, and a recommendation information transmission unit 153.

  Here, the relevance analysis unit 151 analyzes the interest information stored in the interest information storage unit 140, generates related information indicating the relationship between the objects of interest or between the users, and stores it in the related model storage unit 152. save.

  FIG. 10 is a diagram showing an example of related information in the first embodiment of the present invention. In the example of FIG. 10, the related information indicates the relationship between the objects of interest. In this case, the related information includes a target object identifier of the target object and a target object identifier of the target object related to each target object.

  When the recommendation information transmission unit 153 receives a recommendation request from the user, the recommendation information transmission unit 153 extracts a target of interest that the user may be interested in based on the related information stored in the related model storage unit 152, as recommendation information. Send to user. The recommendation information transmission unit 153 stores the recommendation information transmitted to the user in the recommendation result storage unit 160.

  When the recommendation result evaluation unit 170 receives an evaluation request from the administrator, the recommendation result evaluation unit 170 obtains recommendation information based on the recommendation information stored in the recommendation result storage unit 160 and the action history information stored in the action history storage unit 120. It is determined whether or not the received user has performed a predetermined action on the object of interest included in the recommendation information, and is output as an evaluation result.

  Next, operation | movement of the recommendation system 100 in 1st embodiment of this invention is demonstrated.

  Here, the operation will be described by taking as an example a case where the object of interest is a product sold on an EC (Electronic Commerce) site, and the user accesses the server device of the EC site through a web browser. Here, it is assumed that the extraction setting unit 133 accepts input of extraction setting information (extraction conditions) as shown in FIG. 6 from the administrator and stores it in the extraction setting storage unit 132 in advance.

  FIG. 3 is a flowchart showing the operation of the recommendation system 100 according to the first embodiment of the present invention.

  First, the action history receiving unit 110 receives user action history information from the user terminal or the server device, and stores it in the action history storage unit 120 (step S101).

  For example, the action history receiving unit 110 receives action history information of the user with the user identifier “user 1” from the server device at the EC site. Here, the action history information includes a history of actions such as purchase of a product of interest on the server device, browsing of content data in which a detailed description of the product is described, and search for a product. The action history receiving unit 110 stores action history information as illustrated in FIG. 4 in the action history storage unit 120. The action history receiving unit 110 similarly receives action history information for users with other user identifiers and stores them in the action history storage unit 120.

  Next, the interest target determination unit 131 of the interest extraction unit 130 uses the extraction conditions stored in the extraction setting storage unit 132 to determine the user's behavior history information included in the behavior history storage unit 120. It is determined whether or not each interested object included in the action history information is interested (step S102).

  For example, the interest determination unit 131 uses the extraction condition of the extraction condition identifier “condition 1” included in the extraction condition information of FIG. 6 to include the user with the user identifier “user 1” in the action history information of FIG. Determine if you are interested in each object of interest.

  FIG. 8 is a diagram illustrating an example of a determination result by the object-of-interest determination unit 131 in the first embodiment of the present invention. Since the extraction condition of the extraction condition identifier “condition 1” is “if an interest object is purchased, it is determined that the object of interest is interested”, the interest object determination unit 131 uses the user identifier “user 1”. A determination result as shown in FIG.

  The interest determination unit 131 repeats Step S102 for the action history information of all users included in the action history storage unit 120 (Step S103).

  Next, the object-of-interest determination unit 131 stores the determination result in step S102 as interest information in the interest information storage unit 140 (step S104).

  For example, the interest target determination unit 131 stores the interest information as illustrated in FIG. 9 in the interest information storage unit 140.

  Next, the relevance analysis unit 151 of the interest target recommendation unit 150 generates related information indicating the relationship between the interest targets or between the users based on the interest information stored in the interest information storage unit 140. It stores in the related model storage unit 152 (step S105). Here, the relevance analysis unit 151 is well known such as creating a feature vector for each object of interest or for each user based on the interest information and calculating a distance or correlation coefficient between the feature vectors. Using the method, the degree of association between the objects of interest or between the users is calculated. Then, the relevance analysis unit 151 generates related information by specifying another interest object related to a certain interest object or another user related to a certain user based on the calculated relevance degree. .

  For example, the relevance analysis unit 151 creates a feature vector for each object of interest, using as an element whether each of the plurality of users is interested in the object of interest. In this case, the relationship analysis unit 151 calculates the degree of relationship between the objects of interest by calculating the distance between the feature vectors. The relevance analysis unit 151 identifies, for each interest object, another interest object having a relevance level equal to or higher than a predetermined threshold as a related interest object. As a result, the relationship analysis unit 151 generates the related information as shown in FIG. 10 based on the interest information shown in FIG.

  Further, the relevance analysis unit 151 may create a feature vector for each user by using as an element whether the user is interested in each of a plurality of interest targets. In this case, the relevance analysis unit 151 calculates the degree of relevance between users by calculating the distance between these feature vectors. The relevance analysis unit 151 specifies, for each user, other users whose relevance is equal to or higher than a predetermined threshold as related users.

  Next, when the recommendation information transmission unit 153 receives a recommendation request from the user, the recommendation information transmission unit 153 extracts a target of interest that the user may be interested in based on the related information stored in the related model storage unit 152, The recommended information is transmitted to the user (step S106).

  Here, when the related information indicates a relationship between the objects of interest, the recommendation information transmission unit 153 extracts the other objects of interest related to the object of interest with which the user is interested by referring to the related information, and extracts them. The other objects of interest that have been sent are transmitted to the user as recommendation information.

  For example, when a recommendation request is received from the user with the user identifier “user 1”, the recommendation information transmission unit 153 refers to the interest information in FIG. 9 and is interested in the user with the user identifier “user 1”. Interest identifiers “A” and “B” are extracted. The recommendation information transmission unit 153 refers to the related information in FIG. 10 and extracts the interest object identifiers “E” and “F” of the interest objects related to the interest objects of the interest object identifiers “A” and “B”. The recommendation information transmission unit 153 transmits the extracted interest object identifiers “E” and “F” as recommendation information to the user.

  When the related information indicates a relationship between users, the recommended information transmission unit 153 refers to the related information, extracts other users related to the user, and the extracted other users are interested. The interest target identifier of the target of interest may be transmitted to the user as recommendation information.

  In addition, the recommendation information transmission part 153 removes these interest object identifiers from the interest object identifier of recommendation information, when the interest object identifier of the interest object in which a user is interested is contained in the interest object identifier of recommendation information. Also good.

  Further, the recommendation information transmission unit 153 stores the recommendation information transmitted to the user as a recommendation result in the recommendation result storage unit 160 (step S107).

  FIG. 11 is a diagram illustrating an example of a recommendation result according to the first embodiment of this invention. The recommendation result includes the provision date and time of the recommendation information, the user identifier of the user to whom the recommendation information is provided, and the provided recommendation information.

  For example, the recommendation information transmission unit 153 stores the recommendation result in FIG. 11 in the recommendation result storage unit 160.

  Next, when receiving the evaluation request from the administrator, the recommendation result evaluation unit 170 receives the evaluation information stored in the recommendation result storage unit 160 and the action history information stored in the action history storage unit 120. The user who has received the recommendation information determines whether or not the user has performed a predetermined action on the object of interest included in the recommendation information, and outputs it as an evaluation result (step S108). Here, as the predetermined action, for example, purchase of an interest object, browsing of a content page describing the interest object, or the like is designated.

  When the predetermined action is purchase of interest, the recommendation result evaluation unit 170 determines whether the user to whom the recommendation information is provided has purchased the interest included in the recommendation information after the provision date of recommendation information. To do. Then, the recommendation result evaluation unit 170 determines whether or not the object of interest has been purchased for each piece of recommendation information included in the recommendation result, and based on the number determined to have purchased the object of interest and the number of recommended information. Calculate the purchase rate. In addition, when the predetermined action is browsing of a content page described about an object of interest, the recommendation result evaluation unit 170 similarly displays a content page described about the object of interest for each piece of recommendation information included in the recommendation result. It is determined whether or not browsing is performed, and a browsing rate is calculated. Then, the recommendation result evaluation unit 170 outputs the calculated purchase rate or browsing rate as an evaluation result.

  The administrator determines the effect of the recommendation result transmitted to the user based on the output evaluation result, and changes the extraction setting information (extraction condition). The extraction setting unit 133 receives an input of the setting value of the extraction condition from the administrator, and stores it in the extraction setting storage unit 132 as extraction condition information.

  For example, the extraction setting unit 133 accepts input of extraction conditions as shown in FIG. 7 from the administrator, and stores them in the extraction setting storage unit 132 as extraction condition information.

  Then, the recommendation system 100 executes steps S101 to S108 again and outputs an evaluation result.

  As described above, the recommendation system 100 accepts the input of the extraction condition, and the administrator repeats the extraction of the object of interest that the user is interested in, the provision of recommendation information to the user, and the evaluation of the recommendation result. The extraction conditions can be continuously adjusted so that more effective recommendation information can be provided to the user.

  Thus, the operation of the first embodiment of the present invention is completed.

  Next, a characteristic configuration of the first embodiment of the present invention will be described.

  FIG. 1 is a block diagram showing a characteristic configuration of the first embodiment of the present invention.

  The interest extraction device includes an action history storage unit 120, an extraction setting storage unit 132, and an interest target determination unit 131. Here, the behavior history storage unit 120 stores behavior history information indicating a history of user behavior with respect to the object of interest. The extraction setting storage unit 132 stores extraction conditions for determining whether the user is interested in the target of interest based on the action history information. The interest target determination unit 131 determines whether the user is interested in the target of interest based on the action history information in the action history storage unit 120 and the extraction condition in the extraction setting storage unit 132.

  According to the first embodiment of the present invention, it is possible to extract a user's interests using various types of user behavior histories. The reason is that the interest determination unit 131 has the action history information indicating the user's action history with respect to the object of interest stored in the action history storage unit 120 and the user stored in the extraction setting storage unit 132 is interested in This is because it is determined whether or not the user is interested in the object of interest based on the extraction condition for determining whether or not the user is interested.

  Further, according to the first embodiment of the present invention, the extraction condition for determining whether the user is interested in the object of interest can be easily changed according to the type of action history. This is because the extraction setting unit 133 stores the input extraction condition in the extraction setting storage unit 132.

(Second embodiment)
Next, a second embodiment of the present invention will be described in detail with reference to the drawings.

  First, the configuration of the second embodiment of the present invention will be described. FIG. 12 is a block diagram showing a configuration of the recommendation system 100 according to the second embodiment of the present invention.

  Referring to FIG. 12, the interest extraction unit 130 of the recommendation system 100 according to the second embodiment of the present invention includes a plurality of interest target determination units 131 (hereinafter, the codes of the plurality of interest target determination units 131 are denoted by 131a, 131b and 131c). In addition to the configuration of the first embodiment of the present invention, the interest extraction unit 130 of the recommendation system 100 according to the second embodiment of the present invention includes an interest information aggregation unit 134, an aggregation setting storage unit 135, and An aggregation setting unit 136 is included.

  Here, the interest object determination unit 131 receives the action history information stored in the action history storage unit 120 as an input, determines whether the user is interested in the object of interest, and outputs a determination result. Each of the plurality of interest determination units 131 performs determination based on each of the plurality of extraction conditions stored in the extraction setting storage unit 132.

  FIG. 16 is a diagram showing an example of extraction condition information in the second embodiment of the present invention. In the example of FIG. 16, two extraction conditions of extraction condition identifiers “condition 1” and “condition 2” are set in the extraction condition information.

  The extraction setting unit 133 accepts input of a plurality of extraction conditions and stores them in the extraction setting storage unit 132 as extraction condition information.

  The interest information aggregation unit 134 aggregates the interest determination results output from each of the plurality of interest target determination units 131 based on the aggregation setting information stored in the aggregation setting storage unit 135.

  FIG. 17 is a diagram illustrating an example of the aggregation setting information according to the second embodiment of the present invention. The aggregation setting information includes an extraction condition identifier that identifies the extraction condition, and a sampling rate for each extraction condition. In the example of FIG. 17, “100%” is set as the sampling rate of the extraction condition identifier “condition 1”. This indicates that all the determination results output from the interest target determination unit 131 are used as they are. Further, “50%” is set as the sampling rate of the extraction condition identifier “condition 2”. This indicates that the determination result output from the object-of-interest determination unit 131 is used with a probability of 50%.

  The aggregation setting unit 136 receives input of aggregation setting information used in the interest information aggregation unit 134 from the administrator, and stores it in the aggregation setting storage unit 135.

  Next, the operation of the recommendation system 100 according to the second embodiment of the present invention will be described.

  Here, it is assumed that the extraction setting unit 133 accepts input of extraction setting information (extraction conditions) as shown in FIG. 16 from the administrator and stores it in the extraction setting storage unit 132 in advance. Further, it is assumed that the aggregation setting unit 136 receives input of the aggregation setting information (sampling rate) as illustrated in FIG. 17 from the administrator and stores it in the aggregation setting storage unit 135.

  FIG. 13 is a flowchart showing the operation of the recommendation system 100 according to the second embodiment of the present invention.

  First, the action history receiving unit 110 receives user action history information from the user terminal or the server device, and stores it in the action history storage unit 120 (step S201).

  For example, the behavior history receiving unit 110 stores behavior history information as illustrated in FIG. 4 in the behavior history storage unit 120 for the user “user 1”. The action history receiving unit 110 similarly receives action history information for users with other user identifiers and stores them in the action history storage unit 120.

  Next, each interest target determination unit 131 of the interest extraction unit 130 uses the extraction conditions stored in the extraction setting storage unit 132 to determine the user's behavior history information included in the behavior history storage unit 120. It is determined whether or not the user is interested in each object of interest included in the action history information (step S202). Here, each of the plurality of interest target determination units 131 performs determination using each of the plurality of extraction conditions stored in the extraction setting storage unit 132.

  For example, the interest determination unit 131a uses the extraction condition of the extraction condition identifier “condition 1” included in the extraction condition information of FIG. 15 to include the user with the user identifier “user 1” in the action history information of FIG. Determine if you are interested in each object of interest. Further, the user state determination unit 121 of the interest target determination unit 131b uses the extraction condition of the extraction condition identifier “condition 2” included in the extraction condition information of FIG. 15 so that the user with the user identifier “user 1” in FIG. It is determined whether or not each object of interest included in the action history information is interested.

  FIG. 14 is a diagram illustrating an example of a determination result by the object-of-interest determination unit 131a according to the second embodiment of the present invention. Since the extraction condition of the extraction condition identifier “condition 1” is “if the object of interest is purchased, it is determined that the object of interest is interested”, the object of interest determination unit 131a has the user identifier “user 1”. The determination result as shown in FIG.

  FIG. 15 is a diagram illustrating an example of a determination result by the object-of-interest determination unit 131b in the second embodiment of the present invention. The extraction condition of the extraction condition identifier “condition 2” is “if the content data described in the object of interest is viewed twice or more at one time, it is determined that the object of interest is interested”. The interest determination unit 131b obtains the determination result as shown in FIG. 15 for the user with the user identifier “user 1”.

  Each of the plurality of interest determination units 131 repeats step S202 for all user behavior history information included in the behavior history storage unit 120 (step S203).

  Next, the object-of-interest determination unit 131 outputs the determination result in step S202 to the interest information aggregation unit 134 (step S204).

  The interest information aggregation unit 134 samples, for each user, each determination result output from the plurality of interest target determination units 131 based on the aggregation setting information stored in the aggregation setting storage unit 135 (step S205). ). Here, the interest information aggregating unit 134 refers to the aggregation setting information, and samples the determination result using the sampling rate corresponding to the extraction condition used to obtain the determination result.

  FIG. 18 is a diagram illustrating an example of a sampling result with respect to a determination result by the object-of-interest determination unit 131a in the second embodiment of the present invention. Moreover, FIG. 19 is a figure which shows the example of the sampling result with respect to the determination result by the interested object determination part 131b in 2nd embodiment of this invention.

  For example, since the determination result (FIG. 14) output from the interest target determination unit 131a is a determination result obtained using the extraction condition of the extraction condition identifier “condition 1”, the interest information aggregation unit 134 The determination result is sampled using the sampling rate “100%” corresponding to the extraction condition identifier “condition 1”. As a result, the interest information aggregation unit 134 obtains a sampling result as shown in FIG. 18 with respect to the determination result shown in FIG.

  Similarly, since the determination result (FIG. 15) output from the interest target determination unit 131b is a determination result obtained using the extraction condition of the extraction condition identifier “condition 2”, the interest information aggregation unit 134 With reference to 17 aggregation setting information, the determination result is sampled using the sampling rate “50%” corresponding to the extraction condition identifier “condition 2”. As a result, the interest information aggregating unit 134 obtains a sampling result as shown in FIG. 19 with respect to the determination result of FIG.

  Next, the interest information aggregating unit 134 aggregates the sampling results for the respective determination results (step S206).

  FIG. 20 is a diagram illustrating an example of an aggregation result obtained by aggregating sampling results in the second embodiment of the present invention.

  For example, the interest information aggregating unit 134 aggregates the sampling results of FIG. 18 and the sampling results of FIG. 19 to obtain an aggregation result as shown in FIG.

  The interest information aggregating unit 134 repeats steps S205 and S206 for the determination results of all the users output from the interest target determining unit 131 (step S207). Then, the interest information aggregation unit 134 stores the aggregation result for each user as interest information in the interest information storage unit 140 (step S208).

  FIG. 21 is a diagram illustrating an example of interest information in the second embodiment of the present invention. For example, the interest information aggregation unit 134 stores the interest information as illustrated in FIG. 21 in the interest information storage unit 140.

  Next, the relevance analysis unit 151 of the interest target recommendation unit 150 generates related information indicating the relationship between the interest targets or between the users based on the interest information stored in the interest information storage unit 140. It stores in the related model storage unit 152 (step S209).

  FIG. 22 is a diagram showing an example of related information in the second embodiment of the present invention. For example, the relationship analysis unit 151 generates the related information as illustrated in FIG. 22 based on the interest information illustrated in FIG.

  When the recommendation information transmission unit 153 receives a recommendation request from the user, the recommendation information transmission unit 153 extracts a target of interest that the user may be interested in based on the related information stored in the related model storage unit 152, as recommendation information. It transmits to the user (step S210). The recommendation information transmission unit 153 stores the recommendation result in the recommendation result storage unit 160 (step S211). When receiving the evaluation request from the administrator, the recommendation result evaluation unit 170 outputs the evaluation result (step S212).

  The administrator determines the effect of the recommendation result provided to the user based on the output evaluation result, and changes the extraction setting information (extraction condition) and the aggregation setting information (sampling rate). The extraction setting unit 133 receives an input of an extraction condition identifier and a setting value from the administrator, and stores them in the extraction setting storage unit 132 as extraction condition information. In addition, the aggregation setting unit 136 receives an input of an extraction condition identifier and a sampling rate from the administrator, and stores them in the aggregation setting storage unit 135 as aggregation setting information.

  Then, the recommendation system 100 executes steps S201 to S212 again and outputs an evaluation result.

  As described above, the recommendation system 100 receives the input of the extraction condition and the sampling rate, and repeats the extraction of the object of interest that the user is interested in, the provision of recommendation information to the user, and the evaluation of the recommendation result. The administrator can continuously adjust the extraction conditions and the sampling rate so that recommendation information with higher effect can be provided to the user.

  Thus, the operation of the second embodiment of the present invention is completed.

  According to the second embodiment of the present invention, it is possible to extract a target of interest for a user using a plurality of types of behavior histories of the user. The reason is that each of the plurality of interest determination units 131 determines whether or not the user is interested in the target of interest based on each of the plurality of extraction conditions stored in the extraction setting storage unit 132. This is because the interest information aggregating unit 134 aggregates the determination results in the plurality of interest target determining units 131.

  Further, according to the second embodiment of the present invention, the aggregation setting information for aggregating determination results based on a plurality of extraction conditions can be easily changed according to the extraction conditions. The reason is that the aggregation setting unit 136 stores the input aggregation setting information in the aggregation setting storage unit 135.

  While the present invention has been described with reference to the embodiments, the present invention is not limited to the above embodiments. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention.

  For example, in the first and second embodiments of the present invention, “purchasing” is used as the type of action used to determine whether or not the subject of interest is interested or to evaluate recommendation information. "And" browsing "are used as an example. However, as the type of action, other actions for the object of interest such as a search for the object of interest and a bookmark of predetermined content data described for the object of interest may be used.

  In the second embodiment of the present invention, the sampling rate with respect to the extraction condition is a fixed value. However, the sampling rate may be a variable value according to the date and time when the action for which the determination is made and the date and time when the interest is extracted. For example, the sampling rate for the determination result that is 100 days or more before the date and time when interest is extracted is 0%, and the sampling rate after 100 days is 1% every day. You may increase it one by one.

  In the second embodiment of the present invention, the interest information aggregating unit 134 samples the interest determination results output from each of the plurality of interest target determining units 131 based on the sampling rate with respect to the extraction condition. , Sampling results are aggregated. However, the interest information aggregating unit 134 may aggregate the interest determination results using a method other than sampling. For example, the interest determination result is a numerical value of 1 (represents interest) or 0 (represents no interest), and the interest information aggregating unit 134 uses the weights set for the extraction conditions for the plurality of determination results. The total may be added and the total value may be used as the aggregation result.

  A part or all of the above-described embodiment can be described as in the following supplementary notes, but is not limited thereto.

(Appendix 1)
An action history storage unit for storing action history information indicating a history of user actions with respect to the object of interest;
Based on the action history information, an extraction setting storage unit that stores an extraction condition for determining whether the user is interested in the object of interest;
An interest object determination unit that determines whether the user is interested in the object of interest based on the action history information in the action history storage unit and the extraction condition in the extraction setting storage unit. Interest extraction device.

(Appendix 2)
The interest extraction device according to appendix 1, further including an extraction setting unit that stores the input extraction condition in the extraction setting storage unit.

(Appendix 3)
The interest extraction device according to appendix 1 or 2, wherein the extraction condition is specified by a predetermined action performed by the user on the object of interest.

(Appendix 4)
The extraction condition is based on at least one of an order of a plurality of predetermined actions performed by the user on the object of interest or a frequency of a plurality of predetermined actions performed by the user on the object of interest. The interest extraction device according to any one of supplementary notes 1 to 3, which is designated.

(Appendix 5)
The predetermined action of the user with respect to the target of interest includes purchasing the target of interest, browsing the content data describing the target of interest, bookmarking the content data describing the target of interest, and searching for the target of interest. The interest extraction device according to any one of appendices 1 to 4, wherein at least one is used.

(Appendix 6)
The extraction setting storage unit stores a plurality of the extraction conditions,
A plurality of the object of interest determination units that determine whether the user is interested in the object of interest based on each of the plurality of extraction conditions of the extraction setting storage unit;
The interest extraction device according to any one of appendices 1 to 5, further comprising: an interest information aggregating unit that aggregates interest determination results for the interested object in the plurality of interested object determining units.

(Appendix 7)
An aggregation setting storage unit that stores aggregation setting information indicating a method of aggregating the determination results;
The interest extraction device according to appendix 6, wherein the interest information aggregating unit aggregates the determination results of the interest with respect to the target of interest in the plurality of interest target determination units according to the aggregation setting information of the aggregation setting storage unit.

(Appendix 8)
The interest extraction device according to appendix 7, further including an aggregation setting unit that stores the input aggregation setting information in the aggregation setting storage unit.

(Appendix 9)
Action history information indicating a history of the user's action with respect to the target of interest stored in the action history storage unit, and whether or not the user stored in the extraction setting storage unit is interested in the target of interest An interest extraction method for determining whether or not the user is interested in the object of interest based on extraction conditions for

(Appendix 10)
Furthermore, the interest extraction method according to appendix 9, wherein the input extraction condition is stored in the extraction setting storage unit.

(Appendix 11)
The interest extraction method according to appendix 9 or 10, wherein the extraction condition is specified by a predetermined action performed by the user on the object of interest.

(Appendix 12)
The extraction condition is based on at least one of an order of a plurality of predetermined actions performed by the user on the object of interest or a frequency of a plurality of predetermined actions performed by the user on the object of interest. The interest extraction method according to any one of supplementary notes 9 to 11, which is designated.

(Appendix 13)
The predetermined action of the user with respect to the target of interest includes purchasing the target of interest, browsing the content data describing the target of interest, bookmarking the content data describing the target of interest, and searching for the target of interest. The interest extraction method according to any one of appendices 9 to 12, wherein at least one is used.

(Appendix 14)
When determining whether or not the user is interested in the object of interest, the user is interested in the object of interest based on each of the plurality of extraction conditions in the extraction setting storage unit. Whether or not
Furthermore, the interest extraction method according to any one of supplementary notes 9 to 13, wherein determination results for the plurality of extraction conditions are collected.

(Appendix 15)
The interest extraction method according to supplementary note 14, wherein when the determination results for the plurality of extraction conditions are aggregated, the determination results are aggregated according to aggregation setting information indicating a method of aggregating the determination results stored in the aggregation setting storage unit.

(Appendix 16)
The interest extraction method according to supplementary note 15, further comprising storing the input aggregation setting information in the aggregation setting storage unit.

(Appendix 17)
On the computer,
Action history information indicating a history of the user's action with respect to the target of interest stored in the action history storage unit, and whether or not the user stored in the extraction setting storage unit is interested in the target of interest The interest extraction program which performs the process which determines whether the said user is interested in the said interest object based on the extraction conditions for doing.

(Appendix 18)
Furthermore, the interest extraction program of Additional remark 17 which preserve | saves the said extracted extraction conditions in the said extraction setting memory | storage part.

(Appendix 19)
The interest extraction program according to appendix 17 or 18, wherein the extraction condition is specified by a predetermined action performed by the user on the object of interest.

(Appendix 20)
The extraction condition is based on at least one of an order of a plurality of predetermined actions performed by the user on the object of interest or a frequency of a plurality of predetermined actions performed by the user on the object of interest. The interest extraction program according to any one of supplementary notes 17 to 19, which is designated.

(Appendix 21)
The predetermined action of the user with respect to the target of interest includes purchasing the target of interest, browsing the content data describing the target of interest, bookmarking the content data describing the target of interest, and searching for the target of interest. The interest extraction program according to any one of appendices 17 to 20, wherein at least one is used.

(Appendix 22)
When determining whether or not the user is interested in the object of interest, the user is interested in the object of interest based on each of the plurality of extraction conditions in the extraction setting storage unit. Whether or not
Furthermore, the interest extraction program according to any one of appendices 17 to 21, wherein the determination results for the plurality of extraction conditions are collected.

(Appendix 23)
The interest extraction program according to appendix 22, wherein when the determination results for the plurality of extraction conditions are aggregated, the determination results are aggregated according to aggregation setting information indicating a method of aggregating the determination results stored in the aggregation setting storage unit.

(Appendix 24)
Furthermore, the interest extraction program according to appendix 23, which stores the input aggregation setting information in the aggregation setting storage unit.

  The present invention can be used for product recommendation at a shopping site, video content recommendation at a video distribution service, and the like.

DESCRIPTION OF SYMBOLS 100 Recommendation system 110 Action history reception part 120 Action history memory | storage part 130 Interest extraction part 131 Interest object determination part 132 Extraction setting memory | storage part 133 Extraction setting part 134 Interest information aggregation part 135 Aggregation setting memory | storage part 136 Aggregation setting part 140 Interest information memory part DESCRIPTION OF SYMBOLS 150 Interest object recommendation part 151 Relevance analysis part 152 Related model memory | storage part 153 Recommendation information transmission part 160 Recommendation result memory | storage part 170 Recommendation result evaluation part

Claims (10)

An action history storage unit for storing action history information indicating a history of user actions with respect to the object of interest;
Based on the action history information, an extraction setting storage unit that stores an extraction condition for determining whether the user is interested in the object of interest;
An interest object determination unit that determines whether the user is interested in the object of interest based on the action history information in the action history storage unit and the extraction condition in the extraction setting storage unit. Interest extraction device. The interest extraction device according to claim 1, further comprising an extraction setting unit that stores the input extraction condition in the extraction setting storage unit. The interest extraction device according to claim 1 or 2, wherein the extraction condition is specified by a predetermined action performed by the user on the object of interest. The extraction condition is based on at least one of an order of a plurality of predetermined actions performed by the user on the object of interest or a frequency of a plurality of predetermined actions performed by the user on the object of interest. The interest extraction device according to any one of claims 1 to 3, which is specified. The predetermined action of the user with respect to the target of interest includes purchasing the target of interest, browsing the content data describing the target of interest, bookmarking the content data describing the target of interest, and searching for the target of interest. The interest extracting apparatus according to claim 1, wherein at least one is used. The extraction setting storage unit stores a plurality of the extraction conditions,
A plurality of the object of interest determination units that determine whether the user is interested in the object of interest based on each of the plurality of extraction conditions of the extraction setting storage unit;
The interest extraction device according to claim 1, further comprising an interest information aggregating unit for aggregating determination results of interest with respect to the interested object in the plurality of interested object determining units. An aggregation setting storage unit that stores aggregation setting information indicating a method of aggregating the determination results;
The interest extraction device according to claim 6, wherein the interest information aggregating unit aggregates the determination results of the interest with respect to the target of interest in the plurality of interest target determination units according to the aggregation setting information of the aggregation setting storage unit. The interest extraction device according to claim 7, further comprising an aggregation setting unit that stores the input aggregation setting information in the aggregation setting storage unit. Action history information indicating a history of the user's action with respect to the target of interest stored in the action history storage unit, and whether or not the user stored in the extraction setting storage unit is interested in the target of interest An interest extraction method for determining whether or not the user is interested in the object of interest based on extraction conditions for On the computer,
Action history information indicating a history of the user's action with respect to the target of interest stored in the action history storage unit, and whether or not the user stored in the extraction setting storage unit is interested in the target of interest The interest extraction program which performs the process which determines whether the said user is interested in the said interest object based on the extraction conditions for doing.

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