著者

森近 憲行 濱崎 雅弘 亀田 尭宙 大向 一輝 武田 英明

出版者

一般社団法人 人工知能学会

雑誌

人工知能学会論文誌 (ISSN:13460714)

巻号頁・発行日

vol.26, no.2, pp.335-340, 2011 (Released:2011-01-06)

参考文献数

11

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In this paper, we describe our approach for information extraction from documents, which is based on supervised machine learning and collective intelligence approach. This approach is aimed at redeeming each method, because each method has merits and demerits. It provides various ways for users to input data to improve information extraction. Users can add not only supervised data but also a rule to extract values for a set of attributes. Various ways to input data allows many users to add a lot of data for quality improvement and machine learning can reduce noise of data input by users. We implemented it in event-information extraction system, and the experimental result shows effectiveness in correctness and convenience.

著者

小西 克巳 遠山 敏章 渡辺 明日香

出版者

一般社団法人 人工知能学会

雑誌

人工知能学会論文誌 (ISSN:13460714)

巻号頁・発行日

vol.25, no.1, pp.25-36, 2010 (Released:2010-01-06)

参考文献数

20

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This paper proposes a fashion-related image gathering algorithm and a retrieval system. Since it is difficult to define the fashion-related image exactly in mathematical sense, computers can not recognize whether given images are fashion-related even if they use computer vision techniques. It is also difficult to gather and search only fashion-related images on the Internet automatically for the same reason. In order to overcome these difficulties, we focus on human computing power, which helps computers to find fashion-related images from tons of images on the Internet. This paper provides an algorithm to gather high quality fashion-related images and propses a fashion-related image retrieval system, both of which utilize the information and meta data obtained in a fashion-related image sharing site. Evaluation experiments show that the proposed algorithm can gather fashion-related images efficiently and that the proposed retrival system can find desired images more effectively than Google Image Search.

著者

砂山 渡 高間 康史 ダヌシカ ボレガラ 西原 陽子 徳永 秀和 串間 宗夫 松下 光範

出版者

一般社団法人 人工知能学会

雑誌

人工知能学会論文誌 (ISSN:13460714)

巻号頁・発行日

vol.26, no.4, pp.483-493, 2011 (Released:2011-06-08)

参考文献数

34

被引用文献数

5

著者

和泉 潔 後藤 卓 松井 藤五郎

出版者

一般社団法人 人工知能学会

雑誌

人工知能学会論文誌 (ISSN:13460714)

巻号頁・発行日

vol.26, no.2, pp.313-317, 2011 (Released:2011-01-06)

参考文献数

12

被引用文献数

1

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In this study, we propose a new text-mining method for long-term market analysis. Using our method, we performe out-of-sample tests using monthly price data of financial markets; Japanese government bond market, Japanese stock market, and the yen-dollar market. First we extract feature vectors from monthly reports of Bank of Japan. Then, trends of each market are estimated by regression analysis using the feature vectors. As a result of comparison with support vector regression, the proposal method could forecast in higher accuracy about both the level and direction of long-term market trends. Moreover, our method showed high returns with annual rate averages as a result of the implementation test.

著者

上田 洋 村上 晴美 辰巳 昭治

出版者

一般社団法人 人工知能学会

雑誌

人工知能学会論文誌 (ISSN:13460714)

巻号頁・発行日

vol.25, no.1, pp.144-156, 2010 (Released:2010-01-06)

参考文献数

17

被引用文献数

1

---

When users find information about people from the results of Web people searches, they often need to browse many obtained Web pages and check much unnecessary information. This task is time-consuming and complicates the understanding of the designated people. We investigate a method that integrates the useful information obtained from Web pages and displays them to understand people. We focus on curriculum vitae, which are widely used for understanding people. We propose a method that extracts event sentences from Web pages and displays them like a curriculum vita. The event sentence includes both time and events related to a person. Our method is based on the following: (1) extracting event sentences using heuristics and filtering them, (2) judging whether event sentences are related to a designated person by mainly using the patterns of HTML tags, (3) classifying these sentences to categories by SVM, and (4) clustering event sentences including both identical times and events. Experimental results revealed the usefulness of our proposed method.

著者

小町 守 牧本 慎平 内海 慶 颯々野 学

出版者

一般社団法人 人工知能学会

雑誌

人工知能学会論文誌 (ISSN:13460714)

巻号頁・発行日

vol.25, no.1, pp.196-205, 2010 (Released:2010-01-06)

参考文献数

23

被引用文献数

2 2

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As the web grows larger, knowledge acquisition from the web has gained increasing attention. Web search logs are getting a lot more attention lately as a source of information for applications such as targeted advertisement and query suggestion. However, it may not be appropriate to use queries themselves because query strings are often too heterogeneous or inspecifiec to characterize the interests of the search user population. the web. Thus, we propose to use web clickthrough logs to learn semantic categories. We also explore a weakly-supervised label propagation method using graph Laplacian to alleviate the problem of semantic drift. Experimental results show that the proposed method greatly outperforms previous work using only web search query logs.

著者

高野 敦子 池奥 渉太 北村 泰彦

出版者

The Japanese Society for Artificial Intelligence

雑誌

人工知能学会論文誌 (ISSN:13460714)

巻号頁・発行日

vol.24, no.3, pp.322-332, 2009

被引用文献数

3 2

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Recently, the role of reputation information in on-line discussion groups and review sites has received much attention, and that has spurred a great deal of research on sentiment analysis of web documents. It is well known that collecting sentiment expressions, which tend to be domain-dependent, is useful for sentiment analysis. However, it can be prohibitively costly to manually collect expressions for each domain. The purpose of this paper is to propose an automatic method to acquire sentiment expressions on a specific subject from web documents.<BR> Our approach is based on a characteristic of sentiment expressions that often appear with their sentiment causes and both of them have cause-and-effect relationships. We develop a technique for recognizing cause-and-effect relationships between sentiment expressions and their sentiment causes using the results of dependency structure analysis. The proposed method uses this technique to extract sentiment causes starting from a small set of seed sentiment expressions, and extracts sentiment expressions from a set of sentiment causes. <BR> To evaluate this work, we conducted experiments using discussion board messages about hotels and sweets. The results demonstrate that the proposed method effectively extract diversified sentiment expressions relevant to each domain and possesses adequate precision. Precision is also found to be better for compound sentiment expressions.

著者

本村 陽一 西田 佳史

出版者

一般社団法人 人工知能学会

雑誌

人工知能学会論文誌 (ISSN:13460714)

巻号頁・発行日

vol.24, no.2, pp.284-294, 2009 (Released:2009-02-17)

参考文献数

32

被引用文献数

4 3

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Human behavior understanding in everyday life is promising but not established research field. Our project named 'open life matrix' is focused on this field. In these years, many sensor houses and robotic room projects have been studied and sensing and network technology have been established. However, still we have problems to realize everyday life support information systems and services. There are two major problems. The first one is data representation and computational modeling problem in everyday life. The second one is that we don't have a good way to realize valuable services from research outcomes. We propose a challenge to solve these problems by a scheme for accumulating common data set and probabilistic causal modeling during everyday life services.

著者

中村 有作 舞田 哲哉 坂本 比呂志

出版者

一般社団法人 人工知能学会

雑誌

人工知能学会論文誌 (ISSN:13460714)

巻号頁・発行日

vol.22, no.2, pp.191-199, 2007 (Released:2007-01-25)

参考文献数

29

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We propose an efficient algorithm for deciding the reachability between any nodes on XML data represented by connected directed graphs. We develop a technique to reduce the size of the reference table for the reachability test. Using the small table and the standard range labeling method for rooted ordered trees, we show that our algorithm answers almost queries in a constant time preserving the space efficiency and a reasonable preprocessing time.

著者

新出 尚之 高田 司郎 藤田 恵

出版者

一般社団法人 人工知能学会

雑誌

人工知能学会論文誌 (ISSN:13460714)

巻号頁・発行日

vol.26, no.1, pp.13-24, 2011 (Released:2011-01-06)

参考文献数

16

被引用文献数

2 3

---

In multi-agent environments, to model cooperations among autonomous agents, many notions such as mutual beliefs and joint intentions, recognition of possibilities to achieve a goal with cooperation, and team formations, should be formally represented. In the traditional BDI logics, it is hard to treat them uniformly. We show the way to treat them uniformly using the fixed-point operator of the extended BDI logic \ omatoes. We also give some examples to apply it to the proof of some behaviors of multi-agent systems.

著者

小室 允人 船越 孝太郎

出版者

一般社団法人 人工知能学会

雑誌

人工知能学会論文誌 (ISSN:13460714)

巻号頁・発行日

vol.37, no.1, pp.A-L61_1-15, 2022-01-01 (Released:2022-01-01)

参考文献数

31

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The questions "How human-like is this dialogue robot?" and "How natural was the conversation with this dialogue robot?" are major concerns for dialogue robot researchers and developers. However, they have overlooked the way that unique conversational structures exist in actual conversations between humans and dialogue robots, which are different from those between humans. In this paper, we focus on the repetition of the user's own speech, and the user's commenting in the absence of a robot's response, in a conversation with a dialogue robot. These phenomena are unique to conversations with dialogue robots. When the user's speech is not inputted into dialogue robots, users often repeat their own speech. In addition, when the repeated speech is also not inputted to the dialogue robot, users often comment on the absence of response from the robot by giving reasons why the robot does not respond. These phenomena are organized in order, which means the repetition is performed firstly, and if the repeated speech is not inputted, then secondly, users will comment on the absence of response from the robot. We analyze these situations using conversation analysis methods, and discuss how these phenomena are organized in order, and how these phenomena are unique to conversations with dialogue robots. In the last part of the paper, we reconsider the "human-likeness" of dialogue robots.

著者

上山 彩夏 狩野 芳伸

出版者

一般社団法人 人工知能学会

雑誌

人工知能学会論文誌 (ISSN:13460714)

巻号頁・発行日

vol.37, no.2, pp.G-L62_1-10, 2022-03-01 (Released:2022-03-01)

参考文献数

39

---

In recent years, there has been a lot of research on building dialogue systems using deep learning, which can generate relatively fluent response sentences to user utterances. Nevertheless, they tend to produce responses that are not diverse and which are less context-dependent. Assuming that the problem is caused by the Softmax Cross- Entropy (SCE) loss, which treats all words equally without considering the imbalance in the training data, a loss function Inverse Token Frequency (ITF) loss, which multiplies the SCE loss by a weight based on the inverse of the token frequency, was proposed and confirmed the improvement of dialogue diversity. However, in the diversity of sentences, it is necessary to consider not only the information of independent tokens, but also the frequency of incorporating a sequence of tokens. Using frequencies that incorporate a sequence of tokens to compute weights that dynamically change depending on the context, we can better represent the diversity we seek. Therefore, we propose a loss function, Inverse N-gram Frequency (INF) loss, which is weighted based on the inverse of the n-gram frequency of the tokens instead of the frequency of the tokens. In order to confirm the effectiveness of the proposed method on INF loss, we conducted metric-based and human evaluations of sentences automatically generated by models trained on the Japanese and English Twitter datasets. In the metric-based evaluation, Perplexity, BLEU, DIST-N, ROUGE, and length were used as evaluation indices. In the human evaluation, we assessed the coherence and diversity of the response sentences. In the metric-based evaluation, the proposed INF model achieved higher scores in Perplexity, DIST-N, and ROUGE than the previous methods. In the human evaluation, the INF model also showed superior values.

著者

山川 宏

出版者

一般社団法人 人工知能学会

雑誌

人工知能学会論文誌 (ISSN:13460714)

巻号頁・発行日

vol.24, no.1, pp.170-177, 2009 (Released:2009-01-06)

参考文献数

16

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For decision by majority, each voter often exercises his right by delegating to trustable other voters. Multi-step delegates rule allows indirect delegating through more than one voter, and this helps each voter finding his delegate voters. In this paper, we propose powerful voter selection method depending on the multi-step delegate rule. This method sequentially selects voters who is most delegated indirectly. Multi-agent simulation demonstrate that we can achieve highly fair poll results from small number of vote by using proposed method. Here, fairness is prediction accuracy to sum of all voters preferences for choices. In simulation, each voter selects choices arranged on one dimensional preference axis for voting. Acquaintance relationships among voters were generated as a random network, and each voter delegates some of his acquaintances who has similar preferences. We obtained simulation results from various acquaintance networks, and then averaged these results. Firstly, if each voter has enough acquaintances in average, proposed method can help predicting sum of all voters' preferences of choices from small number of vote. Secondly, if the number of each voter's acquaintances increases corresponding to an increase in the number of voters, prediction accuracy (fairness) from small number of vote can be kept in appropriate level.

著者

石田 雄大 秋山 英三

出版者

一般社団法人 人工知能学会

雑誌

人工知能学会論文誌 (ISSN:13460714)

巻号頁・発行日

vol.36, no.5, pp.AG21-J_1-8, 2021-09-01 (Released:2021-09-01)

参考文献数

18

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Though modern organization theory views organizational decision making from a very rational perspective, it is known that actual organizational decision-makings are often done through organized anarchy with “many autonomous actors operating with bounded rationality in an environment with ambiguous goals, an unclear link, between cause and effect, and fluid participation with the activities and subgroups of the organization”, which is well-described by so-called “the garbage can model.” In this study, we investigate how much the introduction of time constraints into the decision of garbage cans (opportunities) can improve the problems arised from organized anarchy. The analyses show that the introduction of time constraints can decrease the number of unsolved problems and also that the number of solved problems is maximized at some length of time constraints in specific organizational structures. These results as a whole indicate the mere introduciton of deadline may improve problems caused by organized anarchy.

著者

高本 綺架 小原 佑斗 吉田 光男 梅村 恭司

出版者

一般社団法人 人工知能学会

雑誌

人工知能学会論文誌 (ISSN:13460714)

巻号頁・発行日

vol.38, no.1, pp.A-M71_1-15, 2023-01-01 (Released:2023-01-01)

参考文献数

20

被引用文献数

2

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Compression-based Dissimilarity Measure (CDM) is reported to work well in classifying strings without clues. However, CDM depends on the compression program, and its theoretical background is unclear. In this paper, we propose to replace CDM with the computation of information quantity. Since CDM only uses compressed size, our approach uses the value of information quantity of maximum probability partitioning of string instead of file size. We find this approach is more effective. Then, CDM and the proposed method were applied to publicly available time series data. In addition to the careful implementation of computation using suffix arrays, we also find this approach more efficient.

著者

坂井 明日香 丸橋 弘明 羽室 行信 笹嶋 宗彦 加藤 直樹 宇野 毅明

出版者

一般社団法人 人工知能学会

雑誌

人工知能学会論文誌 (ISSN:13460714)

巻号頁・発行日

vol.36, no.1, pp.WI2-I_1-12, 2021-01-01 (Released:2021-01-01)

参考文献数

12

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Recently, data-driven sales management is widely recognized and sales at the real super-market is not the exception. For designing such strategies, first of all, we have to analyze consumers’ behavior. However, such an analysis is difficult, especially for the managers of the real shops, since they only have customers’ data of their own shops. Generally, the customers buy things not only from the managers’ shops but also other shops. The goal of this research is to develop a general method to transfer sales promotion strategy, derived from analysis on wide area, to local real shop. The authors analyzed such consumers’ characteristics who buy olive oils in Kansai region. For the analysis, we used QPR(Quick Purchase Report system, developed and managed by MACROMILL, Inc). Firstly, we divided the consumers on the QPR into five clusters, according to the simultaneous buying pattern. Then, we analyzed each of the clusters and found some emerging patterns of the purchasing behavior. Observing the patterns, we designed a marketing strategy for the real shop in Hyogo prefecture belonging Kansai district. Finally, we carried out an experiment at the shop to evaluate whether the strategy promotes the sales of the olive oil or not for six weeks. The result of the experiment showed that the marketing strategy is effective in one view. At the same time, we learned many lessons from the research, especially difficulty of the evaluation at the real shop.

著者

定延 利之

出版者

The Japanese Society for Artificial Intelligence

雑誌

人工知能学会論文誌 (ISSN:13460714)

巻号頁・発行日

vol.30, no.1, pp.353-363, 2015

被引用文献数

1

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In this paper, the author argues that mimetics are not morphological, syntactic, semantic phenomena by nature. Rather, they are a pragmatic behavior, spoken isolated from other sentential elements. This pragmatic behavior is characteristically performative (cf. Austin 1962). The performative characteristic of mimetics is utilized in the context of human play. This paper provides observations on this fact, and using the results of a questionnaire, it presents the possibility that machines may collaborate with humans by using mimetics in the manner of humans. More specifically, the following four points are examined: (i) The morphological, syntactic, semantic patterns often seen in mimetics, in which they are joined with other words in the sentence, such as an adjective noun, verb stem, or adverb, to illustrate or embellish descriptions more vividly, is not a characteristic of mimetics as they can be seen in other classifications of Japanese words, i.e. Yamato, Chinese, and foreign loan words, as well; (ii) In cases where mimetics are not joined with other words, they are spoken isolated from other sententil elements. This pragmatic behavior is hardly seen in other Yamato, Chinese, or foreign loan words and can be called a characteristic of mimetics. This pattern of verbal behavior in mimetics is performative (Austin 1962) on two points: first, if mimetics are not verbalized, the situation will not be apparent during the verbalization, and second, if mimetics are verbalized, this alone will make the situation apparent during the verbalization; (iii) This performative characteristic of mimetics is something that people utilize. One of the independent utterances of mimetics is used in the context of play, when acting as if some internal action had occurred in the speaker, although in fact no such action exists; (iv) There is the possibility that machines may collaborate with humans by using mimetics in the manner of humans. In other words, having machines use mimetics would evoke the context of play in the users; in that context, the machine would be able to act as if some internal action, as well as some physical action, had occurred, although in fact no such actions exist. This will cause the machine to give a cuter, more human, impression. A questionnaire survey conducted on 125 university students lends support to this idea.

著者

福原 知宏 中島 正人 三輪 洋靖 濱崎 雅弘 西村 拓一

出版者

一般社団法人 人工知能学会

雑誌

人工知能学会論文誌 (ISSN:13460714)

巻号頁・発行日

vol.28, no.6, pp.468-479, 2013-11-01 (Released:2013-10-11)

参考文献数

28

被引用文献数

6 4

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A handover support system that supports care workers to share information and knowledge on patients and nursing-care work based on information recommendation is described. A handover is time consuming work because it takes much time to write and retrieve information on patients. We investigated the handover work in a nursing home, and found that about 25% of the work time was spent for sharing information among care workers. The aim of this study is to support care workers to share handover information efficiently.For this aim, we propose a novel handover support system called DANCE (Dynamic Action and kNowledge assistant for Collaborative sErvice fields) that supports care workers to share information and knowledge on patients and nursing-care work based on information recommendation. The system has following functions; (1) a function for recommending handover information based on attribute names and their values, (2) a function for recommending free-text contents of handover information, and (3) a function for sharing multimedia information. We had experiments for evaluating effectiveness of the system, and confirmed that the system can reduce the time for sharing handover information through a day compared to the time based on a notebook. We compared the work time for sharing two types of handover infomation between the system and notebook conditions; (a) information on patients and nursing-care work which is stored as pairs of attribute names and their values, (b) free-text contents on patients. Results of experiments revealed that the system can reduce the time for the former type of information as 55.2% (64.0s) per person a day compared to the notebook condition, and 59.0% (200s) for the latter type of information. An overview of the system and results of experiments are described.

著者

河本 哲 秋光 淳生 浅井 紀久夫

出版者

一般社団法人 人工知能学会

雑誌

人工知能学会論文誌 (ISSN:13460714)

巻号頁・発行日

vol.38, no.3, pp.D-M51_1-14, 2023-05-01 (Released:2023-05-01)

参考文献数

31

---

In Internet advertising, text information is added to increase the appeal of the ad to the viewers. However, some of the advertising documents contain inappropriate expressions. Wording or expressions that exaggerate the efficacy of a product or that recommend a product by a medical professional may violate the Pharmaceutical Affairs Law and the Act against Unjustifiable Premiums and Misleading Representations. Therefore, a system that can effectively and quickly detect problematic advertisements is required. Some advertisements cannot be properly classified based on word statistics alone. Therefore, information other than word statistics must be embedded in the document vector. The advertising documents targeted in this study have characteristics such as “biases in the word positions of specific words” and “periodic occurrence of specific words.” Frequently appearing words in problematic documents (especially in cosmetics advertisements) have strong biases in their word positions, resulting in a complex multimodal distribution of position of occurrence. Therefore, embedding word order information and word period information in document vectors is considered very effective for identifying problematic advertising documents.In recent years, the effectiveness of the BERT model has been recognized in various natural language processing tasks. However, it is also true that faster models are required for application on the Internet advertising. Therefore, as a means of achieving both inference speed and discrimination performance, we propose a document feature based on the discrete Fourier transform(DFT) of word vectors weighted by an index previously proposed in a study that attempted to categorize Chinese Internet advertisements. In addition, we employed the Complex-valued Support Vector Machines as discriminative models that can handle complex numbers and have high generalization performance even with small amounts of data.Although the discrimination performance of the proposed model is inferior to that of ALBERT and BERT to some extent, it is higher than that of DistilBERT, XGBoost, and LightGBM. The inference speed of the proposed model is somewhat slower than XGBoost and LightGBM and needs improvement, but is faster than DistilBERT. Those results indicate that the proposed model is promising when applied on the Internet. In addition, we found that when the index proposed in the previous study (which attempted to categorize Chinese advertisements) was applied to Japanese advertisements, that index emphasized the word vectors of specific nouns and verbs.

著者

曽我 真人 松田 憲幸 瀧 寛和

出版者

一般社団法人 人工知能学会

雑誌

人工知能学会論文誌 (ISSN:13460714)

巻号頁・発行日

vol.23, no.3, pp.96-104, 2008 (Released:2008-02-21)

参考文献数

8

被引用文献数

2 9

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Skill, such as arts, sports and crafts, is regarded as a cycle that consists of the following three steps: recognition of objects, selection of appropriate action series and execution of the action. In arts and crafts, people produce works as a result of this cycle. Skill-learning environment should involve diagnosis-function providing appropriate advice for each step. This paper describes technique that is providing advice in real time when a learner learns recognition of drawing. To assist learners' recognition, we developed the sketch-area-dependent advising system that presents advice with voice for learners' drawing. The effectiveness of advice was confirmed through an experiment evaluating proposed technique.