Faculty Profiles - ISHIKAWA, Yoshiharu

Papers - ISHIKAWA, Yoshiharu

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k-Expected Nearest Neighbor Search over Gaussian Objects Reviewed

Tingting Dong, Ishikawa Yoshiharu, Chuan Xiao, Jing Zhao

Proceedings of the 4th International Conference on Network and Computing Technology (ICNCT 2015) page： 1-11 2015.12

Language：English

Probabilistic location information has been attracting more and more attention due to the advances in computing devices and technologies, and has become an important research topic in recent years. In particular, Gaussian distribution is frequently used to represent probabilistic location information. On the other hand, as one of the commonest queries over location information, the distance-based nearest neighbor search, which finds closest objects to a given query point, has extensive applications in various areas. There have been considerable efforts made to extend nearest neighbor search over traditional location information to probabilistic location information. An example is the expected distance, which defines the distance over probabilistic location information. Following this trend, in this paper, we assume that the closeness between objects represented by Gaussian distributions are measured by their expected distance and consider the problem of k-expected nearest neighbor search. We analyze properties of expected distance on Gaussian distributions mathematically and derive its lower bound and upper bound. Based on our analysis, we propose three novel approaches to efficiently solve this problem. The efficiency of our approaches is demonstrated through extensive experiments.

Top-k Similarity Search over Gaussian Distributions Based on KL-Divergence Reviewed

Tingting Dong, Yoshiharu Ishikawa, Chuan Xiao

Journal of Information Processing Vol. 24 ( 1 ) page： 152-163 2016.1

Language：English Publishing type：Research paper (scientific journal)

The problem of similarity search is a crucial task in many real-world applications such as multimedia databases, data mining, and bioinformatics. In this work, we investigate the similarity search on uncertain data modeled in Gaussian distributions. By employing Kullback-Leibler divergence (KL-divergence) to measure the dissimilarity
between two Gaussian distributions, our goal is to search a database for the top-k Gaussian distributions similar to a given query Gaussian distribution. Especially, we consider non-correlated Gaussian distributions, where there are no correlations between dimensions and their covariance matrices are diagonal. To support query processing, we
propose two types of novel approaches utilizing the notions of rank aggregation and skyline queries. The efficiency and effectiveness of our approaches are demonstrated through a comprehensive experimental performance study.

DOI： 10.2197/ipsjjip.24.152

An Automatic Video Reinforcing System for TV Programs Using Semantic Metadata Reviewed

Yuanyuan Wang, Daisuke Kitamura, Yukiko Kawai, Kazutoshi Sumiya, Yoshiharu Ishikawa

International Journal of Multimedia Data Engineering and Management (IJMDEM) Vol. 7 ( 1 ) page： 1-21 2016.1

時間帯を考慮したパーソナライズ目的地予測

瀧本祥章, 西田京介, 遠藤結城, 戸田浩之, 澤田宏, 石川佳治

第8回データ工学と情報マネジメントに関するフォーラム (DEIM 2016) page： H1-2 2016.2

多階層のカテゴリ分類を用いたSkySR検索の効率化について

佐々木勇和，石川佳治

第8回データ工学と情報マネジメントに関するフォーラム (DEIM 2016) page： A2-2 2016.2

シミュレーションデータウエアハウスにおける災害情報の統合分析

趙菁，石川佳治，杉浦健人，王元元，佐々木勇和, 瀧本祥章

第8回データ工学と情報マネジメントに関するフォーラム (DEIM 2016) page： A2-3 2016.2

Wikipediaのカテゴリを用いた編集者の得意分野特定

近藤弘隆，鈴木優，石川佳治

第8回データ工学と情報マネジメントに関するフォーラム (DEIM 2016) page： C3-5 2016.3

Efficient Autocompletion with Error Tolerance

Sheng Hu, Chuan Xiao, Yoshiharu Ishikawa

第8回データ工学と情報マネジメントに関するフォーラム (DEIM 2016) page： D4-1 2016.3

確率的データストリームにおける情報利得に基づいたパターン照合手法

杉浦健人，石川佳治，佐々木勇和

第8回データ工学と情報マネジメントに関するフォーラム (DEIM 2016) page： A7-2 2016.3

Simulation Data Warehouse for Integration and Analysis of Disaster Information Reviewed

Jing Zhao, Kento Sugiura, Yuanyuan Wang, Yoshiharu Ishikawa

Journal of Disaster Research Vol. 11 ( 2 ) page： 255-265 2016.3

次世代ライフログのための行動オントロジを用いた意味的な複合イベント処理について

橋本聡和, 佐々木勇和，石川佳治, 中村亮

情報処理学会第78回全国大会講演論文集 page： 4L-01 2016.3

RDBを用いた複合イベント処理システムの開発

金山貴紀, 石川佳治, 杉浦健人, 佐々木勇和

情報処理学会第78回全国大会 page： 4L-02 2016.3

生活環境QOLデータの可視化・分析システムの開発

石川佳治, 鈴木優, 王元元, 佐々木勇和, 董テイテイ

電子情報通信学会総合大会 page： D-4-6 2016.3

BEVA: An Efficient Query Processing Algorithm for Error Tolerant Autocompletion Reviewed

Xiaoling Zhou, Jianbin Qin, Chuan Xiao, Wei Wang, Xuemin Lin, Yoshiharu Ishikawa

ACM Transactions on Database Systems (TODS), Vol. 41 ( 1 ) 2016.4

Managing Presentation Slides with Reused Elements Reviewed

Jie Zhang, Chuan Xiao, Sheng Hu, Toyohide Watanabe, Yoshiharu Ishikawa

International Journal of Information and Education Technologies (IJIET) Vol. 6 ( 3 ) page： 170-177 2016.4

Dynamic Mapping of Dense Geo-Tweets and Web Pages based on Spatio-Temporal Analysis Reviewed

Yuanyuan Wang, Goki Yasui, Yukiko Kawai, Toyokazu Akiyama, Kazutoshi Sumiya, Yoshiharu Ishikawa

The 31st ACM/SIGAPP Symposium on Applied Computing (SAC 2016) page： 1170-1173 2016.4

Local Similarity Search for Unstructured Text Reviewed

Pei Wang, Chuan Xiao, Jianbin Qin, Wei Wang, Xiaoyang Zhang, Yoshiharu Ishikawa

The 2016 ACM SIGMOD International Conference on Management of Data 2016.6

TweeVist: A Geo-Tweet Visualization System for Web based on Spatio-Temporal Events Reviewed

Yuanyuan Wang, Yukiko Kawai, Kazutoshi Sumiya, Yoshiharu Ishikawa

The 15th IEEE/ACIS International Conference on Computer and Information Science (ICIS 2016) page： 729-734 2016.6

Frequent Subgraph Mining Based on Pregel Reviewed

Xiang Zhao, Yifan Chen, Chuan Xiao, Yoshiharu Ishikawa, Jiuyang Tang

The Computer Journal Vol. 59 ( 8 ) page： 1113-1128 2016.8

時空間データウェアハウスにおける差分演算について

趙セイ, 石川佳治, 杉浦健人, 脇田佑希子

第15回情報科学技術フォーラム (FIT 2016) page： 2D-4 2016.9

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Papers - ISHIKAWA, Yoshiharu