Embodiments of the present application relate to a method for recommending information, a system for recommending information, and a computer program product for recommending information. A method for recommending information is provided. The method includes determining a set of specific first users comprising at least one specific first user who complies with a first preset condition, the determination being based on operating behavior information of a set of one or more first users recorded in a system, looking up, in the set of specific first users, targeted specific first users having a similarity to a current user who complies with a second preset condition, and providing recommendation information to the current user based on the operating behavior information of the targeted specific first users.
Please help me write a proper abstract based on the patent claims. CLAIM: 1. A method for recommending information, comprising: determining a set of specific first users comprising at least one specific first user who complies with a first preset condition, the determination being based on operating behavior information of a set of one or more first users recorded in a system; looking up, using one or more computer processors and in the set of specific first users, targeted specific first users having a similarity to a current user who complies with a second preset condition; and providing recommendation information to the current user based on the operating to behavior information of the targeted specific first users. 2. The method as described in claim 1, wherein the looking up, in the set of specific first users, of the targeted specific first users having the similarity to the current user who complies with the second preset condition comprises: calculating a similarity in operating behavior between the current user and each specific is first user based on historical operating behavior information of the current user and the specific first users; and confirming specific first users having a similarity that complies with the second preset condition as the targeted specific first users. 3. The method as described in claim 2, wherein the calculating of the similarity in the operating behavior between the current user and each specific first user based on the historical operating behavior information of the current user and the specific first users comprises: determining second users jointly-related to the current user and the specific first users, second users related to a specific first user comprising second users corresponding to operation objects of the specific first user; and calculating a similarity in operating behavior of the current user to the specific first users based on a number of the jointly-related second users, a number of operations by the current user at jointly-related second users and a number of operations by specific first users at jointly-related second users, a total number of second users related to the current user and each specific first user, or any combination thereof. 4. The method as described in claim 1, wherein: the set of one or more first users are pre-divided into at least two types according to a basic attribute of the first users, each type having its own set of specific first users; and the looking up, in the set of specific first users, of the targeted specific first users having a similarity to the current user that complies with the second preset condition comprises: determining a type to which the current user belongs; and looking up, in a set of specific first users of the type, targeted specific first users having a similarity to the current user that complies with a third preset condition. 5. The method as described in claim 4, wherein the providing of the recommendation information to the current user based on the operating behavior information of the targeted specific first users comprises: in the event that, within the set of specific first users of the type, a number of the targeted specific first users having the similarity to the current user that complies with the second preset condition is greater than or equal to a first preset threshold value, providing the recommendation information to the current user based on the operating behavior information of the targeted is specific first users. 6. The method as described in claim 5, wherein the providing of the recommendation information to the current user based on the operating behavior information of the targeted specific first users further comprises: in the event that, within the set of specific first users of this type, the number of the targeted specific first users having the similarity to the current user that complies with the second preset condition is smaller than the first preset threshold value: looking up targeted first users having the similarity to the current user that complies with the second preset condition among a set of one or more first users of this type; and providing the recommendation information to the current user based on the operating behavior information of the targeted first users. 7. The method as described in claim 1, wherein the at least one specific first user that complies with the first preset condition is determined as follows: determining the at least one specific first user that complies with the first preset condition based on the operating behavior information of the set of one or more first users recorded in the system, wherein the operating behavior information of the set of one or more first users includes whether or not in each operation action a second user related to the first user is a specific second user. 8. The method as described in claim 7, wherein the determining of the at least one specific first user that complies with the first preset condition based on the operating behavior information of the set of one or more first users recorded in the system comprises: acquiring the operating behavior information of the set of one or more first users recorded in the system; acquiring statistical data on a set of one or more second users recorded in the system, the statistical data comprising values of a plurality of preset second user variables; establishing a set of specific second users based on the values of a set of one or more second user variables; assessing, in each first user operating action, whether the second user relating to the first user is a specific second user based on the operating behavior information of the first users and the set of the specific second users; and determining whether each first user is a specific first user and establishing the set of specific first users based on the assessment results and the operating behavior information of the first users. 9. The method as described in claim 8, further comprising: conducting iterative updating of the set of specific first users and the set of specific second users based on the following: re-determining whether each first user is a specific first user based on new operating behavior information generated by first users within a first designated time interval and whether or not the related second user in each operating action is a specific second user; updating the set of specific first users according to the re-determination result of each first user; re-determining whether each second user is a specific second user based on new operating information generated by second users within a second designated time interval and whether related first users in the new operating information are specific first users; and updating the set of specific second users according to the re-determination result of each second user. 10. The method as described in claim 9, wherein the re-determining of whether each first user is the specific first user is based on a total number of operations by the first user in the new operating behavior information, a number of related second users which are specific second users in each operating action by the first user, a number of operations by the first user at each second user, the previous redetermination result for each second user, or any combination thereof. 11. The method as described in claim 9, wherein the re-determining of whether each second user is the specific second user is based on: a number of specific first users related to the second user in the new operating information, a total number of times the second user was subject to specific first user operations, a total number of times the second user was subject to operations by each specific first user, the previous redetermination result for each specific first user, or any combination thereof. 12. The method as described in claim 8, wherein the establishing of the set of specific second users based on the values of the set of one or more second user variables comprises: performing a plurality of clusterings of second users based on each variable, wherein the performing of the plurality of clusterings of second users comprises: determining the variables that cluster second users into preset types and embody preset distinctness levels between various types as specific variables; acquiring a weight of each specific variable, the weight being used to correspond to an importance of each specific variable in embodying the preset distinctness levels; establishing a score calculating formula for second users based on the specific variables and each weight of the specific variable; calculating a score of each second user using the score calculating formula; and determining second users having a score that satisfies the first preset condition to be specific second users. 13. The method as described in claim 12, wherein the acquiring of the weight of each specific variable comprises: scoring each second user based on the specific variables and an initial weight of each specific variable; labeling a preset number of second users with the highest scores in each type as extreme samples of a corresponding type, wherein the initial weights of a set of one or more specific variables are equal; and conducting loop learning, using a semi-supervised classification process, a preset number of times based on the extreme samples, to progressively update the weight of each specific variable, wherein the following operations are performed during each learning operation: updating the weight of each specific variable based on a labeled sample set in each type, wherein, during a first learning, the labeled sample set is composed of the extreme samples; to calculating similarities between other second users and each labeled sample; and conducting type labeling of second users having a confidence interval that satisfies a fourth preset condition to add the newly labeled second user to the labeled sample set of the corresponding type and make the labeled sample set available to be used in the next semi-supervised classification learning. 14. The method as described in claim 13, wherein each learning of the conducting of the loop learning, using the semi-supervised classification process, the preset number of times based on the extreme samples, to progressively update the weight of each specific variable, further comprises: scoring each sample in the labeled set based on the weight of each specific variable obtained with the semi-supervised learning, wherein the labeled set is composed of the extreme samples during the initial learning; updating the weight of each specific variable based on the samples in the scored sample set; calculating the similarities between other second users and each scored sample; and scoring second users having a confidence interval that satisfies a preset condition to add the newly scored second user to the scored sample set of the corresponding type and make the scored sample set available to be used in a next semi-supervised regression learning. 15. The method as described in claim 12, wherein: the system comprises an e-commerce transaction platform; and the specific variables comprise the following variables: a positive evaluation rate, a ratio of re-occurrence of related behavior information, a product object online close rate, a product object bookmarking rate, a proportion of higher-than-mean scores in a service rating system, conversion rate of page views from product object detailed information pages, proportion of page views from internal website searches, response rate in related instant messaging systems, a time interval from user confirmation of order to shipment of goods, or any combination thereof. 16. The method as described in claim 12, wherein: the system comprises an e-commerce transaction platform; and each cluster is a two-dimensional cluster, with sales volume information of the second users being one dimension and another variable is the other dimension. 17. The method as described in claim 8, wherein: the system comprises an e-commerce transaction platform; the set of one or more first users corresponds to buyers; the set of one or more second users corresponds to sellers; and the recommendation information corresponds to product recommendation information. 18. The method as described in claim 1, wherein the first preset condition includes making an amount of purchases above a first threshold, viewing a number of products above a second threshold, or any combination thereof. 19. A system for recommending information, comprising: at least one processor configured to: determine a set of specific first users comprising at least one specific first user who complies with a first preset condition, the determination being based on operating behavior information of a set of one or more first users recorded in a system; look up, in the set of specific first users, targeted specific first users having a similarity to a current user who complies with a second preset condition; and provide recommendation information to the current user based on the operating behavior information of the targeted specific first users; and a memory coupled to the at least one processor and configured to provide the at least one processor with instructions 20. A computer program product for recommending information, the computer program product being embodied in a tangible non-transitory computer readable storage medium and comprising computer instructions for: determining a set of specific first users comprising at least one specific first user who complies with a first preset condition, the determination being based on operating behavior information of a set of one or more first users recorded in a system; looking up, in the set of specific first users, targeted specific first users having a similarity to a current user who complies with a second preset condition; and providing recommendation information to the current user based on the operating to behavior information of the targeted specific first users.