J. Digit. Content Technol. its Appl.最新文献_第2页

The Impact of Debt Financing on Firm Investment Behavior: Evidence from China 债务融资对企业投资行为的影响:来自中国的证据

J. Digit. Content Technol. its Appl. Pub Date : 2010-12-31 DOI: 10.4156/JDCTA.VOL4.ISSUE9.3

Jiming Li, C. Shi, Zhaohua Wang

引用次数: 15

Multi-Level Weighted Sequential Pattern Mining Based on Prime Encoding 基于素数编码的多级加权顺序模式挖掘

J. Digit. Content Technol. its Appl. Pub Date : 2010-12-31 DOI: 10.4156/JDCTA.VOL4.ISSUE9.2

Yun Li, Lianglei Sun, Jiang Yin, Wenyan Bao, Mengyuan Gu

{"title":"Multi-Level Weighted Sequential Pattern Mining Based on Prime Encoding","authors":"Yun Li, Lianglei Sun, Jiang Yin, Wenyan Bao, Mengyuan Gu","doi":"10.4156/JDCTA.VOL4.ISSUE9.2","DOIUrl":"https://doi.org/10.4156/JDCTA.VOL4.ISSUE9.2","url":null,"abstract":"Encoding can express the hierarchical relationship in the area of mining the multi-level sequential pattern, up to now all the algorithms of which find frequent sequences just according to frequency, but items have different importance in the real applications, therefore the weight constraint involved to the entire mining process is crucial. The MWSP algorithm based on the candidate generation-and-test approach is one of the best algorithms of the weighted sequential pattern mining, however, which will easily generate the situation of candidate combinatorial explosion during the mining process. Therefore, this paper presents the algorithm PMWSM, which adopts prime encoding to decide the parent-child relationship between different levels by one step of division operation, introduces the concept of K-minimum weighted support count to push weight constraint into the multi-level sequential pattern mining, utilizes the principle of prefix projection database to avoid the occurrence of candidate combinatorial explosion, and takes full advantage of the minimum weighted support count to optimize the algorithm. The experimental results show that the algorithm PMWSM is more effective than the algorithm MWSP on mining multi-level weighted sequential patterns from the sequence database.","PeriodicalId":293875,"journal":{"name":"J. Digit. Content Technol. its Appl.","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133064411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Distributed Dual Cluster Algorithm Based on Grid for Sensor Streams 基于网格的传感器流分布式双聚类算法

J. Digit. Content Technol. its Appl. Pub Date : 2010-12-31 DOI: 10.4156/JDCTA.VOL4.ISSUE9.27

Jianghua Huang, Junying Zhang

{"title":"Distributed Dual Cluster Algorithm Based on Grid for Sensor Streams","authors":"Jianghua Huang, Junying Zhang","doi":"10.4156/JDCTA.VOL4.ISSUE9.27","DOIUrl":"https://doi.org/10.4156/JDCTA.VOL4.ISSUE9.27","url":null,"abstract":"In practical applications, Wireless Sensor Networks generate massive data streams with the dual attributes in geography and optimization domain. Energy source of sensor nodes in WSN is usually limited; Data streams transmission is known to be the largest consumer of energy in WSN. Therefore, reduce the total data transmission and maximizing energy efficiency is the major challenge in WSN. In addition, sensor data points usually have attributes in the optimization and the geography domain. In most existing clustering algorithms, the similarity measurement mainly takes the non-geometric attributes into consideration. However, in many real applications, the geometric attributes are what users are concerned about. Motivated by the above, this paper presents an efficient Distributed Dual Cluster Algorithm Based on Grid (DDCG) for sensor streams to minimize sensor nodes energy consumption and clustering results in which a cluster has not only high proximity in geometrical domain, but also high similarity in optimization domain. To solve the dual attributes problem, the proposed DCG algorithm combines the information in both geographic and non-geographic attributes by constructing a super-rectangular grid cell and merging the grid cells into connected region (cluster). To minimize sensor nodes energy consumption, DCCG algorithm consists of two levels of clustering: local clustering and global clustering. First, clustering is conducted at group heads with a local clustering algorithm DCG, and the features of local clusters are extracted. Second, local features are sent to sink where global clustering is obtained based on those features. Experiments on Synthetic datasets show that the algorithm DDCG has higher efficiency, lower energy consumption.","PeriodicalId":293875,"journal":{"name":"J. Digit. Content Technol. its Appl.","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125741819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

A Collaborative Filtering Recommendation Algorithm Based on User Interest Change and Trust Evaluation 基于用户兴趣变化和信任评估的协同过滤推荐算法

J. Digit. Content Technol. its Appl. Pub Date : 2010-12-31 DOI: 10.4156/JDCTA.VOL4.ISSUE9.13

Zhimin Chen, Yi Jiang, Yao Zhao

引用次数: 54

The Hash Postfix Table Based Metadata Management Algorithm for Mass Storage System 基于Hash后缀表的海量存储系统元数据管理算法

J. Digit. Content Technol. its Appl. Pub Date : 2010-12-31 DOI: 10.4156/JDCTA.VOL4.ISSUE9.12

Xiujuan Li, Tao Cai, Shiguang Ju

引用次数: 1

The Financial Structure and High-Tech Industries Development in China 中国金融结构与高新技术产业发展

J. Digit. Content Technol. its Appl. Pub Date : 2010-12-31 DOI: 10.4156/JDCTA.VOL4.ISSUE9.10

Liuyong Yang, Shen Mo, Anqi Zhou

引用次数: 3

The Sources of China's Economics Growth during 1997-2007: An Analysis based on Input-Output Approach 1997-2007年中国经济增长的来源:基于投入产出法的分析

J. Digit. Content Technol. its Appl. Pub Date : 2010-12-31 DOI: 10.4156/JDCTA.VOL4.ISSUE9.22

Ruixiang Liu

引用次数: 0

The Partner Selection in Virtual Enterprise based on BDI Agent 基于BDI Agent的虚拟企业合作伙伴选择

J. Digit. Content Technol. its Appl. Pub Date : 2010-12-31 DOI: 10.4156/JDCTA.VOL4.ISSUE9.5

Wang Yu, Zhu Feng, Geng Hua, Zhuwang Jing

引用次数: 4

A Watermarking Algorithm Based on Block Energy Analysis of Wavelet Transform's Coefficients and Lorenz Chaotic Attractor 基于小波变换系数块能量分析和Lorenz混沌吸引子的水印算法

J. Digit. Content Technol. its Appl. Pub Date : 2010-12-31 DOI: 10.4156/JDCTA.VOL4.ISSUE9.19

Xuelong Hu, Wei Tian, Yongai Zheng

引用次数: 5

A Knowledge Recommend System Based on User Model 基于用户模型的知识推荐系统

J. Digit. Content Technol. its Appl. Pub Date : 2010-12-31 DOI: 10.4156/JDCTA.VOL4.ISSUE9.20

Jiagen Sheng, Sifeng Liu

引用次数: 10