CN115186014A - Data processing method for educational training - Google Patents
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Abstract
The invention relates to the technical field of data processing, in particular to a data processing method for educational training, wherein related electronic equipment is adopted to identify each child in a target classroom, the behavior membership degree corresponding to each child is determined based on the prestige frequency of each child in the classroom, the typical hesitation time of interaction and the hesitation stability degree, the child with the largest behavior membership degree is taken as a representative child in a target time period and is taken as an object for recommending simulation when a young teacher reviews the target time, the quality of a copy can be improved compared with a mode of randomly selecting a simulation object, the young teacher is helped to find the defects when interacting with the child, the training of professional ability is further deepened, the workload of the copy of the young teacher can be reduced compared with a mode of simulating all children one by one, and the copy efficiency is improved.
Description
Technical Field
The invention relates to the technical field of data processing, in particular to a data processing method for education training.
Background
Preschool education is foundation education for life development, people attach more and more importance to the preschool education, and practical infant teacher training has wide market prospect.
At present, professional training of preschool education is difficult to realize by scene simulation. As most preschool education forms are indoor interactive activities, children are easy to vague for a great amount of education contents depending on children sitting on the ground, and the interactive ability of teachers is tested. Present VR (virtual reality) technique can provide an immersive experience, can guarantee that the teacher looks back, understand the administrative effect of education in-process, discover the problem that its classroom in-process exists, and then improve follow-up classroom quality, but there is effectual data drive mode temporarily, data processing mode promptly, lead to the teacher not to know when looking back that to put into which children's role and experience, be unfavorable for the teacher to discover the problem that its classroom in-process exists, thereby the effect that the teacher utilized the VR technique to look back in class has been reduced.
Disclosure of Invention
In order to solve the problem that the existing data processing mode can not enable a young teacher to not know which role of the child to be placed for experience when the young teacher uses VR technology to review in the classroom, so that the effect of reviewing in the classroom is reduced, the invention aims to provide a data processing method for educational practical training.
The invention discloses a data processing method for educational training, which comprises the following steps:
acquiring the frequent degree of the prestige of each child in a classroom, the typical hesitation time for interaction and the stability degree of the presthesion in the target classroom;
calculating attraction degrees of the classroom to the children according to typical hesitation time and hesitation stability degree of the interaction of the children in the target classroom;
calculating the behavior difference distance between any two children according to the attraction degree, the prestige frequency degree and the delay time sequence of each child in the classroom of the target classroom; classifying the children in the target classroom according to the behavior difference distance to obtain a plurality of types; the delay time sequence is a sequence formed by the interaction delay times of the corresponding children in the class;
for either type: calculating the spatial distance between each child in the type and other children of the type according to the prestige frequency of each child in the type and the prestige state sequence corresponding to the target time period, calculating the behavior membership degree corresponding to each child in the type according to the spatial distance, taking the child with the maximum behavior membership degree as a representative child of the type corresponding to the target time period, and taking the representative child of the type corresponding to the target time period as a recommended simulation object when a young teacher looks back at the target time; the periscopic state sequence corresponding to the target time period is a sequence formed by enough periscopic states corresponding to the acquisition moments of the corresponding children in the target time period.
Further, the method for obtaining the stability degree of the late doubt comprises the following steps:
the degree of hesitation stability is calculated using the following formula:
wherein, the first and the second end of the pipe are connected with each other,the degree of hesitation stability for a child,is the typical hesitation time for that child,in order to find the maximum value of the value,is the late-suspected time series for that child.
Further, the late suspected time is typically the average of the first 30% of the maximum late suspected times in the late suspected time sequence.
Further, the attraction degree of the classroom to each child is calculated by using the following formula:
wherein, the first and the second end of the pipe are connected with each other,in order to attract a child in a classroom,represents a typical suspicion time of the child, K represents a suspicion stability degree of the child, tanh () is a hyperbolic tangent function, alpha is a neighborhood correction parameter,,is the maximum of the typical hesitation times for children in the eight neighbourhood of the child.
Further, the behavior difference distance between any two children is calculated by using the following formula:
wherein the content of the first and second substances,being the behavioural difference distance between child a and child B,in order to the attraction degree of the class to the child a,to the extent of attraction of the class to the child B,the frequent degree of the look for the child a,the frequent degree of the look of the child B,is the late-suspected time series for child a,is the late-suspected time series of child B,the cosine similarity is solved.
Further, the calculating a spatial distance between each child in the category and another child in the category according to the prestige frequency of each child in the category and the prestige status sequence corresponding to the target time period includes:
wherein the content of the first and second substances,is the spatial distance between the child p and the child q,for the sequence of states of the child p in the target time period,for the sequence of the states of the child q in the target time period,to the extent that the child p is looking at frequently,the frequent degree of prestige of the children q.
Further, calculating behavior membership corresponding to each child in the type according to the spatial distance, including:
the behavioral membership is calculated using the following formula:
wherein, the first and the second end of the pipe are connected with each other,the behavior membership of the child sample p,is the spatial distance between the child sample p and the child sample q,kth reachable distance for child sample pThe set of child samples covered in, K being the set value.
Furthermore, the DBSCAN algorithm is utilized to classify the children in the target classroom.
Has the advantages that: the method obtains parameters capable of reflecting behaviors, attention and performance of children in an activity classroom, wherein the parameters comprise frequent degree of prestige of each child in the classroom, typical delay time for interaction and delay stability degree; classifying children in the classroom according to the parameters to obtain different types of children; next, analyzing the children included in each type, and selecting representative children in each type as recommended simulation objects in the later period of driving VR, compared with a mode of randomly selecting simulation objects, the method can improve the quality of the reply, help the young students find the defects in the interaction with the children, further deepen the training of professional ability, and improve the VR review effect; compared with a mode of simulating all children one by one, the tray-duplicating work load of the young teachers can be reduced, and the tray-duplicating efficiency is improved.
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Fig. 1 is a flow chart of a data processing method for educational training of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention.
As shown in fig. 1, the data processing method for educational training of the present embodiment includes:
step 1: and acquiring the frequent degree of the hope of each child in the classroom, the typical delay time for interaction and the delay stability degree in the target classroom.
This embodiment represents the classroom of the study as the target classroom with multiple children in the target area. In the embodiment, two cameras are arranged in a target classroom, wherein the first camera is a common camera for shooting children and is used for acquiring and calculating the head direction of the children; the second is a VR camera, which is set up behind the sitting area of the children seat for the children to simulate the situation of the children watching the attention reduction.
In order to determine the listening and speaking habits of each child in the target classroom from the activity classroom, the listening and speaking modes of each child are counted, and the frequent degree of each child's prestige is calculatedTypical hesitation time of a child to an interactionAnd the degree of tardy stability. The specific acquisition process of the parameters is as follows:
the head posture of each child can be estimated by collecting the facial key points and the three-dimensional Mesh through the first camera, and a more common way is to determine the ear key points by using OpenPose and roughly calculate the head posture by combining the recognition result of the facial key points. The deflection angle A of the head relative to the position of the young teacher can be obtained through conversion of the pose of the camera, and the specific conversion process is not repeated as the existing head deflection angle estimation technology is widely applied. For the head deflection angle of the child, canPolar coordinate space setting tolerance angle interval based on head center of childTo distinguish the state of the child watching the teachers at the time t from the state of looking aroundRecording the looking-at state of each child in the whole classThe samples are taken every 5 seconds until time T is reached and the activity class is over. When the child is in the state of watching the young teacher,=1; when the child does not belong to the state of watching the young teacher, i.e., the state of showing a look-up,=0, the child belongs to the state of watching the young teacher, namely the child has the head deflection angle in the tolerance angle intervalThe child is not in the condition of watching the young teacher, i.e. the head deflection angle of the child is not in the tolerance angle interval. Tolerance angle intervalCan be set by self when in application.
Counting the frequent degree of observation: when the state of looking at the child does not belong to the state for 2 times continuously from a certain moment, the state of looking at the child is considered to be ended, and the child continues to pay attention to the content of the activity class of the young teacher. MeterCalculating the time length of the child in the looking-at state, the looking-at frequencyThe time that the deflection angle of the head posture exceeds the tolerance angle (namely the time in the state of looking at) accounts for the whole class time, and the greater the frequent degree of looking at, the less interested the children in the activity class information of the current teacher.
Calculating the typical hesitation time of a child to an interaction: the interaction time interval is designated by the teachers in each class, so that the hesitation time of the children in the activity class is calculated. Each class generally consists of a plurality of interactions, when the child is in a state of being held in sight before the interaction starts, the beginning of each interaction can attract the attention of the child to turn to the young teacher, a plurality of interaction hesitation times exist in the process, and the hesitation times can form an hesitation time sequenceWherein, in the step (A),the hesitation time for a child at the first interaction,the hesitation time of a certain child at the nth interaction, N is the total number of interactions involved in the class.
Typical hesitation times can be calculated for multiple attention shifts of children in an activity classroomAnd late suspicion of stability degree K. For children, multiple times of attention inattention are common phenomena, how to attract children is a part of training of preschool education specialties, and the method is also an important link for guaranteeing education quality. There are many times for inattentionThe interactive hesitation phenomenon, several obvious hesitations enough to affect the quality of the current activity class of the child, is calculated by the embodiment,Time series for question delayThe average of the first 30% of the maximum late times included in the late times. In this embodiment, the typical interaction time is calculated according to the last 30% of the maximum late time, and as another embodiment, the last 25% or 40% of the maximum late time may be selected to calculate the typical interaction time.
The suspicion stability degree K may represent the stability degree of the suspicion time of the child in the current activity class, which is shown in this embodimentIf the ratio of the typical latency to the maximum interactive latency is smaller, then this is saidAndthe difference is large; if the ratio of the typical hesitation time to the maximum interactive hesitation time is large, it is statedAndthe difference is small, and the difference is small,and can represent the attraction degree of the class to the children. Implementer settingsThe threshold value of (2) is set,below the threshold, the hearing and speaking quality of the child is considered to be not greatly affected, and K =1; for children without hesitation time, K =1 was set.
Therefore, the frequent degree of the hope of each child in the target classroom, the typical delay time for interaction and the delay stability degree can be obtained.
Step 2: and calculating the attraction degree of the classroom to each child according to the typical delay time and the delay stability degree of each child to the interaction in the target classroom.
The shorter the hesitation time, i.e., the less distracting the child is, the more attractive the child is to interact and listen to in the class of activities by the young teacher and the greater the child's attraction to the quality of the class of activities. In this embodiment, the following formula is specifically used to calculate the attraction degree of the classroom to each child:
wherein the content of the first and second substances,in order to attract a child in a classroom,the larger the suction, the larger the degree of suction;indicating the typical suspicion time of the child and K indicating the suspicion stability of the child.The smaller, theCompared withLarger, if K is not considered, but only in orderSince the calculated attraction degree is large as the size of the attraction degree of the child in the class, the attraction degree of the child listening and speaking is corrected by using K as the correction index in this embodiment. tanh () is a hyperbolic tangent function, used here for normalization of parameters.
The method comprises the following steps of calculating the maximum typical hesitation length of eight neighborhoods, wherein alpha is a neighborhood correction parameter, the eight neighborhoods of the positions where children are located need to be referenced in a setting mode, and the eight neighborhoods can be mutually influenced, so that the maximum typical hesitation length of the eight neighborhoods is counted and used as a reference value. When a child is in a certain position, the typical hesitation time of the child at hand is larger than that of the child, and the child is considered to be more concerned about the activity class content of the young teacher than the surrounding child is attracted by other things. In this exampleIn whichIndicating a typical late-to-doubt time for a child,is the maximum of the typical hesitation times for children in the eight neighbourhood of the child. When the child is at an edge location, no non-existent neighborhoods are included in the calculation. The degree of attraction of the children to the contents of the teachers' activities in the activities class is obtained through analysis。
And step 3: calculating the behavior difference distance between any two children according to the attraction degree, the prestige frequency degree and the delay time sequence of each child in the classroom of the target classroom; classifying the children in the target classroom according to the behavior difference distance to obtain a plurality of types; the hesitation time sequence is a sequence formed by the interaction hesitation times of the corresponding children in the class.
The embodiment analyzes the in-class data of the children in the target classroom and determines the difference of the interaction behaviors of the children of different types to the activity classroom. In the embodiment, based on a dbscan algorithm, r and minpts are set for clustering to obtain more clustering clusters, wherein each clustering cluster is a type; wherein the child behavior difference distance function is constructed as follows:
wherein, the first and the second end of the pipe are connected with each other,being the behavioural difference distance between child a and child B,to the extent of attraction of the class to the child a,in order to the attraction degree of the class to the child B,the frequent degree of the look for the child a,the frequent degree of the prestige of the child B,is the late-suspected time series for child a,is a late-doubt time series for child B,the cosine similarity is solved. In the embodiment, the cosine similarity distance is used for secondary comparison, and the attraction degree of the children during listening and speaking is determined according to the similarityFrequent degree of observationAnd constructing a behavior vector. The present embodiment utilizesThe calculation is carried out for the purpose of avoiding coincidence of similar attraction degrees caused by different behavior modes when the attraction degrees are determined, so that the final calculation results of the values of different parameters are the same.
Thus, the difference in the degree of attraction to the activity class between any two children can be obtained. According to the mode, the distance comparison is carried out on any two sampled children at present, and the difference distance between any two children is obtained. Therefore, a child group hypothesis space based on psychological behaviors is obtained, and children with different listening and speaking modes are divided into different child groups based on the improved DBSCAN based on the hypothesis space, wherein each child group corresponds to one type. For example, some children can be well attracted when the interaction between the teachers begins, so that the late-to-doubt time is short and the attraction degree value is large, but the attention is often attracted when the children are not in the interaction link, and the children in the listening and speaking modes are classified into one type. In addition, there is also a large attraction value, and children who continuously pay attention to the young teacher are classified into one type. Of course, there may be other listening and speaking modes of children classified as other types. The r and the minpts can be set by themselves during application, and the difference of the r and the minpts during application can cause the difference of the type quantity and the classification result of the later-stage division, but the division of the child types can be realized.
And 4, step 4: for either type: calculating the spatial distance between each child in the type and other children of the type according to the prestige frequency of each child in the type and the prestige state sequence corresponding to the target time period, calculating the behavior membership degree corresponding to each child in the type according to the spatial distance, taking the child with the maximum behavior membership degree as a representative child of the type corresponding to the target time period, and taking the representative child of the type corresponding to the target time period as a recommended simulation object when a young teacher looks back at the target time; the periscopic state sequence corresponding to the target time period is a sequence formed by the periscopic states corresponding to the collecting moments of the corresponding children in the target time period.
For each listening and speaking mode of children, the young teacher can simulate the head direction of the children in a classroom in a VR mode to simulate and experience the behaviors of the children for teaching. This is inefficient, however, and does not allow for a good analysis of the key reference views and a determination of when the view may represent a location where the teacher needs to have increased expertise, resulting in the teacher having to traverse through many times to find the cause. Considering that for a plurality of children belonging to a listening and speaking mode, the young teacher only needs to select one of the most representative children for analysis, so that the present embodiment next selects the child representative in each listening and speaking mode, so that the young teacher only needs to simulate the child representative in each listening and speaking mode to quickly find the reason that the attention of the corresponding type of children is affected when reviewing at the later stage.
This embodiment takes 8 minutes as a time period, which is a sliding sampling window, and the following is calculated for each data update as the time of the activity class changes. This embodiment performs sampling once every 5 seconds, so this embodiment updates the following calculation process every 5 seconds.
For any period of time in an activity classroom, a state space of attention of a child in a certain listening and speaking mode in the period of time is constructed. The present embodiment utilizes the following formula to calculate the spatial distance between two children belonging to the same type at a certain time:
wherein the content of the first and second substances,is the spatial distance between the child p and the child q,the child p is in the periscopic state sequence in the period of time, the periscopic state sequence is the set of the periscopic states corresponding to the sampling moments in the period of time,for the sequence of the states of attentiveness of the child q during this time, since the included attentiveness states of a group of children are not completely similar but may be approximately of the same type, when the attentiveness state of a child belongs to the situation represented by most children,the state features that can represent attention are similar, so distances are scaled to close distances in the hypothetical space, i.e., the term goes towards 1, whereas it is kept farther away to longer distances.Can reflect the condition of attention loss of children in a tidy class,to the extent that the child p is looking at frequently,the frequent degree of the children q, the times of the children p and q may be different, so that the state space of attention can further reflect the concentration and the ignorant behavior difference of one type of children. In this embodiment, the period of time is recorded as a target time, and when a time period corresponding to the period of time changes, the target time period also changes correspondingly.
For in the state spaceCalculating the Kth reachable distance of each childKth reachable distanceI.e. the distance at which a child sample radiates outward in the associated state space until the K-th adjacent sample is covered. In this embodiment, K is 5, and for K which cannot reach 5, calculation is not required, and K is regarded as an isolated sample; for K up to 5, the analysis was continued. When the children training device is used specifically, an implementer can set the K value according to the number of the class children.
At Kth reachable distance of child sample pIn the method, K child samples q can be covered, and all the covered child samples q are constructed into a set in the covered space. Therefore, the behavior membership degree of the child sample p can be obtained:
wherein the content of the first and second substances,the behavior membership of the child sample p,is the spatial distance between the child sample p and the child sample q. When the behaviors of the children are unified with other children, the higher the concentration degree of the concentration characteristics of the children p and the surrounding of the state space of the children p is, the smaller the reachable distance is, and the higher the membership degree is, which means that the behaviors of the children are representative in the time period and have higher reference value. Conversely, low concentration and membershipLower means that the child's behavior is unique over the time period, with less reference value.
The embodiment takes the most representative child in the period of time as the child representative of the pattern to be observed in the period of time. And taking the set of most representative children corresponding to the time period in each mode as the child roles recommended to be simulated when the teacher looks back at the time period in the later period. The children representative corresponding to different time periods is calculated in the embodiment, the roles of the recommended and simulated children are different when the young teacher looks back at different time periods, the membership degree calculation is performed every 5 seconds in the embodiment, and the recommended data is more real-time. As other embodiments, the membership level calculation may be performed at longer intervals to avoid large calculations or large fluctuations in the recommended data.
The embodiment obtains parameters capable of reflecting behaviors, attention and performance of children in an activity classroom, wherein the parameters comprise frequent degree of prestige of each child in the classroom, typical lagged time for interaction and lagged stability degree; classifying children in the classroom according to the parameters to obtain different types of children; next, analyzing the children included in each type, and selecting representative children in each type as recommended simulation objects for driving VR at a later stage, wherein compared with a mode of randomly selecting simulation objects, the method can improve the quality of a reply, help a young teacher find the defects when interacting with the children, and further deepen the training of professional ability; compared with a mode of simulating all children one by one, the tray-duplicating work load of the young teachers can be reduced, and the tray-duplicating efficiency is improved.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present application, and they should be construed as being included in the present application.
Claims (8)
1. A data processing method for educational training, comprising:
acquiring the frequent degree of the prestige of each child in a classroom, the typical hesitation time for interaction and the stability degree of the presthesion in the target classroom;
calculating attraction degrees of the classroom to the children according to typical hesitation time and hesitation stability degree of the interaction of the children in the target classroom;
calculating the behavior difference distance between any two children according to the attraction degree, the prestige frequency degree and the delay time sequence of each child in the classroom of the target classroom; classifying the children in the target classroom according to the behavior difference distance to obtain a plurality of types; the delay time sequence is a sequence formed by the interaction delay times of the corresponding children in the class;
for either type: calculating the spatial distance between each child in the type and other children of the type according to the prestige frequency of each child in the type and the prestige state sequence corresponding to the target time period, calculating the behavior membership degree corresponding to each child in the type according to the spatial distance, taking the child with the maximum behavior membership degree as a representative child of the type corresponding to the target time period, and taking the representative child of the type corresponding to the target time period as a recommended simulation object when a young teacher looks back at the target time; the periscopic state sequence corresponding to the target time period is a sequence formed by the periscopic states corresponding to the acquisition moments of the corresponding children in the target time period.
2. The data processing method for educational training according to claim 1, wherein the method for obtaining the degree of lateness stability comprises:
the degree of hesitation stability is calculated using the following formula:
3. The data processing method for educational practical training according to claim 2, wherein the typical hesitation time is a mean value of the first 30% of maximum hesitation times among the hesitation times included in the hesitation time series.
4. The data processing method for educational training according to claim 1, wherein the attraction level of a classroom to each child is calculated using the following formula:
wherein the content of the first and second substances,to the attraction degree of a classroom to a certain child,represents the typical hesitation time of the child, K represents the hesitation stability degree of the child, tanh () is a hyperbolic tangent function, alpha is a neighborhood correction parameter,,is the maximum of the typical hesitation times for children in the eight neighbourhoods of the child.
5. The data processing method for educational training according to claim 1, wherein the behavior difference distance between any two children is calculated using the following formula:
wherein the content of the first and second substances,being the behavioural difference distance between child a and child B,to the extent of attraction of the class to the child a,to the extent of attraction of the class to the child B,the frequent degree of the look for the child a,the frequent degree of the look of the child B,is the late-suspected time series of child a,is the late-suspected time series of child B,to find the cosine similarity.
6. The data processing method for educational training according to claim 1, wherein the calculating the spatial distance between each child in the category and other children in the category according to the frequent degree of views of each child in the category and the sequence of views corresponding to the target time period comprises:
wherein the content of the first and second substances,is the spatial distance between the child p and the child q,for the sequence of states of the child p in the target time period,for the sequence of the children's q's state of view within the target time period,the frequent degree of the look of the child p,the frequent degree of prestige of the children q.
7. The data processing method for educational training according to claim 6, wherein calculating the behavioral membership corresponding to each child in the category according to the spatial distance comprises:
the behavioral membership is calculated using the following formula:
8. The data processing method for educational training according to claim 1, wherein each child in the target classroom is classified using DBSCAN algorithm.
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CN110070295A (en) * | 2019-04-25 | 2019-07-30 | 平安科技(深圳)有限公司 | The evaluation and analysis method, apparatus and computer equipment of Classroom Teaching |
CN110916631A (en) * | 2019-12-13 | 2020-03-27 | 东南大学 | Student classroom learning state evaluation system based on wearable physiological signal monitoring |
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CN108389000A (en) * | 2018-03-09 | 2018-08-10 | 新华网股份有限公司 | Processing method, device and the computing device of child attention concentration degree information |
CN110070295A (en) * | 2019-04-25 | 2019-07-30 | 平安科技(深圳)有限公司 | The evaluation and analysis method, apparatus and computer equipment of Classroom Teaching |
CN110916631A (en) * | 2019-12-13 | 2020-03-27 | 东南大学 | Student classroom learning state evaluation system based on wearable physiological signal monitoring |
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