CN105045921A - Method and device for providing recommendation information for mobile terminal - Google Patents
Method and device for providing recommendation information for mobile terminal Download PDFInfo
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- CN105045921A CN105045921A CN201510527593.1A CN201510527593A CN105045921A CN 105045921 A CN105045921 A CN 105045921A CN 201510527593 A CN201510527593 A CN 201510527593A CN 105045921 A CN105045921 A CN 105045921A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/90—Details of database functions independent of the retrieved data types
- G06F16/95—Retrieval from the web
- G06F16/953—Querying, e.g. by the use of web search engines
- G06F16/9537—Spatial or temporal dependent retrieval, e.g. spatiotemporal queries
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/90—Details of database functions independent of the retrieved data types
- G06F16/95—Retrieval from the web
- G06F16/953—Querying, e.g. by the use of web search engines
- G06F16/9535—Search customisation based on user profiles and personalisation
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Abstract
The invention provides a method and a device for providing recommendation information for a mobile terminal, wherein the method comprises the following steps of: receiving an information query request from the mobile terminal, wherein the information query request includes key words; obtaining the located terminal position information of the mobile terminal, searching out recommendation information corresponding to the key words from a historical database, and searching out providing point position information corresponding to the recommendation information; obtaining the distance between the mobile terminal and each recommendation information providing point through calculation according to the terminal position information and the providing point position information; determining the recommendation information providing points with the distance smaller than the preset value; using the recommendation information provided by the determined recommendation information providing points as recommendation information to be filtered, performing collaborative filtering on the recommendation information to be filtered by a collaborative filtering algorithm, and obtaining the filtered recommendation information; and issuing the filtered recommendation information to the mobile terminal. The scheme has the advantage that the accuracy of the recommendation information can be improved.
Description
Technical field
The present invention relates to the information processing technology, particularly relate to as mobile terminal provides method and the device of recommendation information.
Background technology
The continuous progress of the communication technology is filled with new blood to the development of internet.Nowadays by the mobile terminals such as smart mobile phone whenever and wherever possible accessing Internet become the life style of people.People no longer to need to be sitting in face of computer just by network browsing information, carry out information interaction, the transformation of this mode changes the used custom had greatly, too increases the COS of the network information simultaneously.The continuous growth of the mobile Internet information content and service will exceed the receptible scope of mobile subscriber gradually, simultaneously, because mobile terminal is compared with traditional PC, the ability such as interface display, terminal processes is all more limited, so mobile Internet more easily produces problem of information overload, mobile message overload has had a strong impact on the utilization factor of mobile network resource.
In order to solve this difficult problem, occur, for mobile terminal provides the improvement opportunity of recommendation information, specifically comprising:
When mobile terminal carries out information inquiry, network side filters the recommendation information inquired, and the recommendation information after filtering is fed back to mobile terminal.Information data amount after filtration can set according to actual conditions, solves the problem of information overload like this.
Although existing scheme can solve the defect of information overload, existing filtering technique is coarse, can not provide recommendation information accurately to terminal.
Summary of the invention
The invention provides a kind ofly provides the method for recommendation information for mobile terminal, and the method can improve the accuracy of recommendation information.
The invention provides a kind ofly provides the device of recommendation information for mobile terminal, and this device can improve the accuracy of recommendation information.
For mobile terminal provides a method for recommendation information, the method comprises:
Receive the information inquiring request from mobile terminal, described information inquiring request comprises keyword;
Obtain the terminal positional information at mobile terminal place, from historical data base, inquire the recommendation information corresponding with keyword, and inquire and corresponding with this recommendation information provide dot position information;
According to terminal positional information and provide dot position information calculate mobile terminal and each recommendation information provide a little between distance;
Determine that distance is less than the recommendation information setting numerical value and provides a little;
Thered is provided by the recommendation information determined the recommendation information a little provided as recommendation information to be filtered, adopt collaborative filtering to carry out collaborative filtering to recommendation information to be filtered, obtain the recommendation information after filtering;
Recommendation information after filtering is handed down to mobile terminal.
For mobile terminal provides a device for recommendation information, this device comprises information transmit-receive unit, location information acquiring unit, metrics calculation unit and filter element;
Described information transmit-receive unit, receives the information inquiring request from mobile terminal, sends to described location information acquiring unit, and described information inquiring request comprises keyword; Receive the recommendation information from described filter element, be handed down to mobile terminal;
Described location information acquiring unit, obtain the terminal positional information at mobile terminal place, the recommendation information corresponding with keyword is inquired from historical data base, and inquire and corresponding with this recommendation information provide dot position information, by terminal positional information with provide dot position information to send to described metrics calculation unit;
Described metrics calculation unit, according to terminal positional information and provide dot position information calculate mobile terminal and each recommendation information provide a little between distance; Determine that distance is less than the recommendation information setting numerical value and provides a little, provided by the recommendation information determined the recommendation information a little provided as recommendation information to be filtered, send to described filter element;
Described filter element, adopts collaborative filtering to carry out collaborative filtering to recommendation information to be filtered, obtains the recommendation information after filtering; Recommendation information after filtering is sent to described information transmit-receive unit.
As can be seen from such scheme, in the present invention, after receiving the information inquiring request from mobile terminal, obtain the terminal positional information at mobile terminal place, from historical data base, inquire the recommendation information corresponding with keyword, and inquire and corresponding with this recommendation information provide dot position information; According to terminal positional information and provide dot position information calculate mobile terminal and each recommendation information provide a little between distance; Determine that distance is less than the recommendation information setting numerical value and provides a little; Thered is provided by the recommendation information determined the recommendation information a little provided as recommendation information to be filtered, adopt collaborative filtering to carry out collaborative filtering to recommendation information to be filtered, obtain the recommendation information after filtering; Recommendation information after filtering is handed down to mobile terminal.In the present invention, first position-based distance is filtered recommendation information, and filtering distance mobile terminal information far away provides a little, then adopts collaborative filtering to filter further, thus, make the recommendation information after filtration more accurate.
Accompanying drawing explanation
Fig. 1 for the present invention for mobile terminal provides the method indicative flowchart of recommendation information;
Fig. 2 for the present invention for mobile terminal provides the method flow diagram example of recommendation information;
Fig. 3 for the present invention for mobile terminal provides the apparatus structure schematic diagram of recommendation information.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with embodiment and accompanying drawing, the present invention is described in more detail.
In the present invention, first position-based distance is filtered recommendation information.Collaborative filtering is existing technology of filtering data, and the present invention is applied to further as mobile terminal provides in the filtration of recommendation information, thus, make the recommendation information after filtration more accurate.
See Fig. 1, for the present invention for mobile terminal provides the method indicative flowchart of recommendation information, it comprises the following steps:
Step 101, receives the information inquiring request from mobile terminal, and described information inquiring request comprises keyword.
When needs carry out information inquiry, user sends information inquiring request by the query webpage of mobile terminal to network side, wherein comprises keyword.
Step 102, obtains the terminal positional information at mobile terminal place, inquires the recommendation information corresponding with keyword from historical data base, and inquires and corresponding with this recommendation information provide dot position information.
Terminal positional information can by mobile terminal reporting to network side, also passable, is obtained voluntarily by network side; Particularly:
The terminal positional information comprised in obtaining information inquiry request; Or, obtain corresponding terminal positional information according to the mobile terminal identification comprised in information inquiring request from mobile network.
Have recorded the relevant information of each recommendation information in historical data base, can obtain as required; The recommendation information such as comprising recommendation information corresponding provides a little, and each recommendation information provides positional information a little.Illustrate, when inquire about be the cinema of Beijing time, each cinema information will be obtained from historical record, comprise the information such as cinema's title and brief introduction, and, also obtain and the positional information provided a little of this recommendation information be provided, namely dot position information is provided; With regard to cinema, it provides dot position information to be cinema's positional information.
Step 103, according to terminal positional information and provide dot position information calculate mobile terminal and each recommendation information provide a little between distance.
Terminal positional information is expressed as A, dot position information will be provided to be expressed as B, the mode calculating distance between A, B has multiple, such as, on electronic chart, first can determine A, B 2 point, then obtain the distance between these 2.All right, calculate in the following way:
Terminal positional information is expressed as A (α
1, β
1), dot position information will be provided to be expressed as B (α
2, β
2), wherein α represents longitude, and β represents dimension;
Adopt following formulae discovery obtain mobile terminal and recommendation information provide a little between distance distance:distance=2 π R θ/360 °; Wherein, R is earth radius, and θ adopts following formulae discovery to obtain:
[sin(θ/2)]
2＝[sin(α
1-α
2)/2]
2+[sin(β
1-β
2)/2]
2cosα
1cosα
2。
Step 104, determines that distance is less than the recommendation information setting numerical value and provides a little.
Setting numerical value can be chosen as required, such as, be 5 kilometers.
Step 105, provides the recommendation information a little provided as recommendation information to be filtered using the recommendation information determined, adopt collaborative filtering to carry out collaborative filtering to recommendation information to be filtered, obtains the recommendation information after filtering.
Collaborative filtering is applied to as mobile terminal provides in the scheme of recommendation information by the present invention, during specific implementation, similarity analysis, filtration are carried out in relevant record based on recommendation information and recommendation information, and described relevant record such as accesses the time of recommendation information, the score value etc. of each recommendation information in historical record.Collaborative filtering is prior art, concrete as based on the collaborative filtering of user, project-based collaborative filtering, seldom repeats here.
Step 106, is handed down to mobile terminal by the recommendation information after filtering.
Adopt the present invention program, first position-based distance is filtered recommendation information, and filtering distance mobile terminal information far away provides a little, then adopts collaborative filtering to filter further, thus, make the recommendation information after filtration more accurate.
Below in conjunction with Fig. 2, to the present invention for mobile terminal provides the method for recommendation information to be illustrated, it comprises the following steps:
Step 201, receives the information inquiring request from mobile terminal, and described information inquiring request comprises keyword and terminal positional information.
Step 202, inquires the recommendation information corresponding with keyword from historical data base, and inquires and corresponding with this recommendation information provide dot position information.
Step 203, is expressed as A (α by terminal positional information
1, β
1), dot position information will be provided to be expressed as B (α
2, β
2), calculate the distance distance between A and B.
Wherein α represents longitude, and β represents dimension; When recommendation information has many, provide dot position information B to be multiple, the distance between dot position information and mobile terminal is respectively provided respectively.
Adopt following formulae discovery obtain mobile terminal and recommendation information provide a little between distance distance:distance=2 π R θ/360 °; Wherein, R is earth radius, and θ adopts following formulae discovery to obtain:
[sin(θ/2)]
2＝[sin(α
1-α
2)/2]
2+[sin(β
1-β
2)/2]
2cosα
1cosα
2。
Step 204, determines that distance is less than the recommendation information setting numerical value and provides a little.
Step 205, provides the recommendation information a little provided as recommendation information to be filtered using the recommendation information determined, for recommendation information to be filtered, obtain the score value that user is arranged for each recommendation information from historical data base.
Step 206, carries out time attenuation transform to the score value of each recommendation information, using the value obtained as converting rear score value, according to the score value after recommendation information and conversion, carrying out collaborative filtering computing, obtaining the recommendation information after filtering.
In historical data base, have recorded the score value of user to each recommendation information, this score value will be used for follow-uply carrying out similarity system design, filtration.In this example, in order to make collaborative filtering more accurate, introducing attenuation function, time adjustment is carried out to score value.
Particularly: the setup times obtaining each score value from historical data base, each score value is multiplied by respective attenuation function, the value obtained is as score value after conversion, and attenuation function is expressed as:
wherein, t
virepresent that user v is to the setup times of recommendation information i, t
0represent current time, α represents time attenuation parameter.In different application scene, the value of α is different, can arrange as required; Such as, the score value change about recommendation information in a certain application scenarios is very fast, then can value comparatively large, otherwise then get less value.
In existing collaborative filtering, comprise the collaborative filtering based on user, and project-based collaborative filtering, project wherein that is to say the recommendation information of indication in the present invention.Acquisition recommendation information and user are after the score value of each recommendation information setting, and collaborative filtering just can be adopted to carry out collaborative filtering; Formula involved by the calculating process of collaborative filtering is more numerous and diverse, and is prior art, repeats no longer one by one here.
Step 207, using the recommendation information after filtration as finally recommending collection, is handed down to mobile terminal.
In the present invention, be first the position determining mobile terminal, obtain the longitude and latitude of terminal, according to different application scenarioss, select different scopes to carry out location filtering.Decreased the quantity of recommendation information by location filtering, reduce the complexity when calculated recommendation information, also can recommend the recommendation information of more convenient reality.Then the recommendation information obtained filtration carries out the calculating of collaborative filtering, and introduces forgetting function in filter algorithm.Finally obtain final recommendation collect and produce recommendation information, and issue terminal.
See Fig. 3, for the present invention for mobile terminal provides the device of recommendation information, it is characterized in that, this device comprises information transmit-receive unit, location information acquiring unit, metrics calculation unit and filter element;
Described information transmit-receive unit, receives the information inquiring request from mobile terminal, sends to described location information acquiring unit, and described information inquiring request comprises keyword; Receive the recommendation information from described filter element, be handed down to mobile terminal;
Described location information acquiring unit, obtain the terminal positional information at mobile terminal place, the recommendation information corresponding with keyword is inquired from historical data base, and inquire and corresponding with this recommendation information provide dot position information, by terminal positional information with provide dot position information to send to described metrics calculation unit;
Described metrics calculation unit, according to terminal positional information and provide dot position information calculate mobile terminal and each recommendation information provide a little between distance; Determine that distance is less than the recommendation information setting numerical value and provides a little, provided by the recommendation information determined the recommendation information a little provided as recommendation information to be filtered, send to described filter element;
Described filter element, adopts collaborative filtering to carry out collaborative filtering to recommendation information to be filtered, obtains the recommendation information after filtering; Recommendation information after filtering is sent to described information transmit-receive unit.
Preferably, described metrics calculation unit, is expressed as A (α by terminal positional information
1, β
1), dot position information will be provided to be expressed as B (α
2, β
2), wherein α represents longitude, and β represents dimension; Adopt following formulae discovery obtain mobile terminal and recommendation information provide a little between distance distance:distance=2 π R θ/360 °; Wherein, R is earth radius, and θ adopts following formulae discovery to obtain: [sin (θ/2)]
2=[sin (α
1-α
2)/2]
2+ [sin (β
1-β
2)/2]
2cos α
1cos α
2.
Preferably, the collaborative filtering based on user is carried out to recommendation information to be filtered employing collaborative filtering, or carries out project-based collaborative filtering.
Preferably, when carrying out collaborative filtering, specifically comprise: for recommendation information to be filtered, from historical data base, obtain the score value that user is arranged for each recommendation information; According to the score value that recommendation information and user are the setting of each recommendation information, carry out collaborative filtering computing, obtain the recommendation information after filtering; Further, also comprise:
Time attenuation transform is carried out to the score value of each recommendation information, using the value obtained as converting rear score value, for carrying out the collaborative filtering computing based on user; Particularly: the setup times obtaining each score value from historical data base, each score value is multiplied by respective attenuation function, the value obtained is as score value after conversion, and attenuation function is expressed as:
wherein, t
virepresent that user v is to the setup times of recommendation information i, t
0represent current time, α represents time attenuation parameter.
Preferably, described location information acquiring unit, the terminal positional information comprised in obtaining information inquiry request; Or, obtain corresponding terminal positional information according to the mobile terminal identification comprised in information inquiring request from mobile network.
The present invention is based on the positional information of mobile terminal, mobile terminal is accurately located, to recommend the recommendation information with region character to mobile terminal; Further, time factor is also considered in collaborative filtering by the present invention, improves the accuracy of recommendation information further.Like this, make reach higher personalization level in reciprocal process, and make the recommendation information issued of mobile terminal more accurate.And tradition carries out, in the scheme that recommendation information issues, just carrying out quantity restriction simply for mobile terminal, to reduce the recommendation information amount issued, the effect of raising accuracy cannot be reached.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (10)
1., for mobile terminal provides a method for recommendation information, it is characterized in that, the method comprises:
Receive the information inquiring request from mobile terminal, described information inquiring request comprises keyword;
Obtain the terminal positional information at mobile terminal place, from historical data base, inquire the recommendation information corresponding with keyword, and inquire and corresponding with this recommendation information provide dot position information;
According to terminal positional information and provide dot position information calculate mobile terminal and each recommendation information provide a little between distance;
Determine that distance is less than the recommendation information setting numerical value and provides a little;
Thered is provided by the recommendation information determined the recommendation information a little provided as recommendation information to be filtered, adopt collaborative filtering to carry out collaborative filtering to recommendation information to be filtered, obtain the recommendation information after filtering;
Recommendation information after filtering is handed down to mobile terminal.
2. the method for claim 1, is characterized in that, terminal positional information is expressed as A (α
1, β
1), dot position information will be provided to be expressed as B (α
2, β
2), wherein α represents longitude, and β represents dimension;
Adopt following formulae discovery obtain mobile terminal and recommendation information provide a little between distance distance:distance=2 π R θ/360 °; Wherein, R is earth radius, and θ adopts following formulae discovery to obtain:
[sin(θ/2)]
2＝[sin(α
1-α
2)/2]
2+[sin(β
1-β
2)/2]
2cosα
1cosα
2。
3. the method for claim 1, is characterized in that, described in carry out collaborative filtering and comprise:
Carry out the collaborative filtering based on user, or, carry out project-based collaborative filtering.
4. the method for claim 1, is characterized in that, described in carry out collaborative filtering and comprise: for recommendation information to be filtered, from historical data base, obtain the score value that user is arranged for each recommendation information; According to the score value that recommendation information and user are the setting of each recommendation information, carry out collaborative filtering computing, obtain the recommendation information after filtering; The method comprises further:
Time attenuation transform is carried out to the score value of each recommendation information, using the value obtained as converting rear score value, for carrying out the collaborative filtering computing based on user; Particularly: the setup times obtaining each score value from historical data base, each score value is multiplied by respective attenuation function, the value obtained is as score value after conversion, and attenuation function is expressed as:
wherein, t
virepresent that user v is to the setup times of recommendation information i, t
0represent current time, α represents time attenuation parameter.
5. the method according to any one of Claims 1-4, is characterized in that, the terminal positional information at described acquisition mobile terminal place comprises:
The terminal positional information comprised in obtaining information inquiry request; Or, obtain corresponding terminal positional information according to the mobile terminal identification comprised in information inquiring request from mobile network.
6. for mobile terminal provides a device for recommendation information, it is characterized in that, this device comprises information transmit-receive unit, location information acquiring unit, metrics calculation unit and filter element;
Described information transmit-receive unit, receives the information inquiring request from mobile terminal, sends to described location information acquiring unit, and described information inquiring request comprises keyword; Receive the recommendation information from described filter element, be handed down to mobile terminal;
Described location information acquiring unit, obtain the terminal positional information at mobile terminal place, the recommendation information corresponding with keyword is inquired from historical data base, and inquire and corresponding with this recommendation information provide dot position information, by terminal positional information with provide dot position information to send to described metrics calculation unit;
Described metrics calculation unit, according to terminal positional information and provide dot position information calculate mobile terminal and each recommendation information provide a little between distance; Determine that distance is less than the recommendation information setting numerical value and provides a little, provided by the recommendation information determined the recommendation information a little provided as recommendation information to be filtered, send to described filter element;
Described filter element, adopts collaborative filtering to carry out collaborative filtering to recommendation information to be filtered, obtains the recommendation information after filtering; Recommendation information after filtering is sent to described information transmit-receive unit.
7. device as claimed in claim 6, is characterized in that terminal positional information is expressed as A (α by described metrics calculation unit
1, β
1), dot position information will be provided to be expressed as B (α
2, β
2), wherein α represents longitude, and β represents dimension; Adopt following formulae discovery obtain mobile terminal and recommendation information provide a little between distance distance:distance=2 π R θ/360 °; Wherein, R is earth radius, and θ adopts following formulae discovery to obtain: [sin (θ/2)]
2=[sin (α
1-α
2)/2]
2+ [sin (β
1-β
2)/2]
2cos α
1cos α
2.
8. device as claimed in claim 6, is characterized in that, described filter element, carries out the collaborative filtering based on user, or carry out project-based collaborative filtering to recommendation information to be filtered employing collaborative filtering.
9. device as claimed in claim 6, is characterized in that described filter element, when carrying out collaborative filtering, specifically comprises: for recommendation information to be filtered, obtains the score value that user is arranged for each recommendation information from historical data base; According to the score value that recommendation information and user are the setting of each recommendation information, carry out collaborative filtering computing, obtain the recommendation information after filtering; Further, also comprise:
Time attenuation transform is carried out to the score value of each recommendation information, using the value obtained as converting rear score value, for carrying out the collaborative filtering computing based on user; Particularly: the setup times obtaining each score value from historical data base, each score value is multiplied by respective attenuation function, the value obtained is as score value after conversion, and attenuation function is expressed as:
wherein, t
virepresent that user v is to the setup times of recommendation information i, t
0represent current time, α represents time attenuation parameter.
10. the device according to any one of claim 6 to 9, is characterized in that, described location information acquiring unit, the terminal positional information comprised in obtaining information inquiry request; Or, obtain corresponding terminal positional information according to the mobile terminal identification comprised in information inquiring request from mobile network.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510527593.1A CN105045921A (en) | 2015-08-26 | 2015-08-26 | Method and device for providing recommendation information for mobile terminal |
| HK16105313.1A HK1217372A1 (en) | 2015-08-26 | 2016-05-10 | Method and device for providing recommendation information for mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510527593.1A CN105045921A (en) | 2015-08-26 | 2015-08-26 | Method and device for providing recommendation information for mobile terminal |
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|---|---|
| CN105045921A true CN105045921A (en) | 2015-11-11 |
Family
ID=54452468
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|---|---|---|---|
| CN201510527593.1A Pending CN105045921A (en) | 2015-08-26 | 2015-08-26 | Method and device for providing recommendation information for mobile terminal |
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| HK (1) | HK1217372A1 (en) |
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| WO2019218335A1 (en) * | 2018-05-18 | 2019-11-21 | Beijing Didi Infinity Technology And Development Co., Ltd. | Systems and methods for recommending a personalized pick-up location |
| CN111192657A (en) * | 2018-11-15 | 2020-05-22 | 宁波方太厨具有限公司 | Menu recommendation method based on user behavior heat |
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Also Published As
| Publication number | Publication date |
|---|---|
| HK1217372A1 (en) | 2017-01-06 |
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