Rakuten, Inc.

Rakuten Group, Inc.

Yu Hirate

Hiroki Mihara

Pablo Loyola

Narutaka Iwasaki

Daisuke Kikuta

Takuma Ebisu

Md Mostafizur Rahman

Manoj Kondapaka

Satyen Abrol

An information processing apparatus acquires user features indicating features for each of a plurality of users and item features indicating features for each of a plurality of items, acquires time-series information indicating time-series interactions between the plurality of users and the plurality of items, constructs, based on the user features, the item features, and the time-series information, a graph including a plurality of user nodes representing the plurality of users, a plurality of item nodes representing the plurality of items, and links indicating interaction relationships in the plurality of user nodes and the plurality of item nodes, and extracts, from the graph, a node representation in the graph for any node among the plurality of user nodes and the plurality of item nodes.

Information processing apparatus, information processing method, and non-transitory computer readable medium

In a processing system, a first processing deviceobtains first characteristics information indicating a characteristics of users in a first environment, divides the users into first clusters according to the first characteristics information, and transmits, to a second processing device, belonging information indicating which of the first clusters each of the users belongs to. The second processing deviceobtains second characteristics information indicating characteristics of the users in a second environment, and divides the users into second clusters according to the belonging information and the second characteristics information. The present invention allows for dividing the users into clusters more accurately while keeping the first and second characteristics information separate, although the second processing deviceneed not use the first characteristics information collected in the first environment and the first processing deviceneed not use the second characteristics information collected in the second environment.

Processing system, processing device, processing method, program, and information storage medium

In a processing system, a first processing deviceobtains first characteristics information indicating characteristics of users in a first environment, divides the users into first clusters according to the first characteristics information, and transmits, to a second processing device, representation information representing characteristics of users belonging to each of the first clusters using a centroid vector based on the first characteristics information of the cluster. The second processing deviceobtains second characteristics information indicating characteristics of the users in a second environment, and divides the users into second clusters according to the representation information and the second characteristics information. The present invention allows for dividing the users into clusters more accurately, although the second processing deviceneed not use the first characteristics information and the first processing deviceneed not use the second characteristics information.

A category highly relevant to a keyword combination including a plurality of keywords is extracted. An information processing apparatus extracts a category where the number of times when the category is specified as a search condition along with a first keyword is greater than or equal to a first threshold value from among a plurality of categories that are hierarchized in a tree structure. Subsequently, from among categories corresponding to descendants of the extracted category, the information processing apparatus extracts a category where the number of times when the category is specified as a search condition along with a second keyword is greater than or equal to a second threshold value as a category relevant to a combination of the first keyword and the second keyword.

Information processing apparatus, information processing method, information processing program, and recording medium

To associate a keyword with a category having a high degree of relevance with the keyword. An association apparatus comprises an acquisition means that acquires the number of times when each of a plurality of categories of a search target is designated as a search condition together with a keyword, and a registration means that registers category information indicating the category for which the number of times acquired by the acquisition means is a threshold or more, and the keyword in an associated manner.

Search keyword and category association apparatus, search keyword and category association method, search keyword and category association program and recording medium

A character string which is set in advance is stored (S), and display data are obtained (S), and link information is extracted from the obtained display data (S), and a partial link character string is generated from the extracted link information (S), and similarity of the character string and the partial link character string is calculated (S), and a determination is made as to whether the link information is similar link information on the basis of the calculated similarity (S), and when the link information is determined to be the similar link information, a display positionwhere the extracted link information is displayed is specified, and a display area () for displaying existence information indicating existence of the similar link information is specified on the basis of the specified display position (S), and the existence information indicating existence of the similar link information is displayed in the specified display area (S).

Method for increasing the security level of a user device that is searching and browsing web pages on the internet

A search query including a search word entered by the user is obtained (S), the obtained search query is stored in association with user identification information and acquisition time of the search query into a search query log DB(S). In the case where a predetermined user operation is detected, search queries corresponding to the user identification information of the user are extracted (S). A first search query is specified from the extracted search queries (S), a second search query whose acquisition time is earlier than acquisition time of the first search query is specified from the extracted search queries (Sand S). A search word in the first search query and a search word in the second search query are registered as related words into a related-word DB(S).

Related-word registration device, information processing device, related-word registration method, program for related-word registration device, recording medium, and related-word registration system

An information processing apparatus determines a threshold value of the number of times of use of a keyword on the basis of the number of times of use of the keyword in each unit period included in a cycle period. Next, the information processing apparatus identifies a period in which the numbers of times of use exceeds the threshold value in the cycle period as a candidate of a popularity period of the keyword. Next, the information processing apparatus excludes the identified period from the popularity period if a situation in which the numbers of times of use in the identified period exceed the threshold value is different from a situation based on a periodic popularity of the keyword. When the identified candidate period is not excluded from the popularity period, the information processing apparatus determines the identified period to be the popularity period.

A search query of a search word entered by the user is received, the received search queries are stored in accordance with reception order, a preceding search query whose reception order is earlier than that of the received search query is extracted on the basis of a preset search query extracting condition, a preceding search word constructing the extracted preceding search query and a search word constructing the received search query are stored as a character string set, a character string set having the search word which is the same or similar to the preceding search word is extracted in accordance with a preset character string set extraction start condition (S), a character set as a related word is specified from the extracted character string set on the basis of a preset registration condition (S), and the specified character string set is registered as related words into a related-word database (S).

Related-word registration device, information processing device, related-word registration method, program for related-word registration device, and recording medium

A related-word candidate group () obtained by extracting candidates of a related word on the basis of a predetermined condition from a search query log () is generated (Sto S), a search query of a search word entered by the user is received (S), a partial character string is generated from a character string of the search word (S), on the basis of the partial character strings, a candidate character string is extracted from the related-word candidate group (S), a suitability score of the candidate character string is calculated (S), the candidate character strings are ranked in order of the scores (S), a reference line Lof a suitability score for the ranking is generated on the basis of the suitability score and the ranking (S), a candidate character string whose suitability score is apart from the reference line by a preset threshold or larger is extracted as a registration character string to be registered as a related word (S), and the extracted registration character string and the search word are registered as related words into the related-word DB(S).

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Shinagawa-ku, Japan

Yu Hirate