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Towards Video Management over Relational database

Towards Video Management over Relational Database

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International Asia-Pacific Web Conference (APWEB)

作者： Hui Li Xiao Zhang Shan Wang Xiaoyong Du School of Information Key Laboratory of Data Engineering and Knowledge Engineering Shanghai Key Laboratory of Intelligent Information Processing MOE Renmin University of China China

Video has become popular in our daily life for both professional and consumer applications. Both low level video processing and high level semantic video analysis are critically computational tasks in application domains. Most of current video computing tools are developed for specific analytic tasks, they are lack higher level interoperability with database and treat database merely as a relational data storage engine rather than an analytic platform, which causes inefficient data access and massive amount of data movement. In this paper, we study how to support video data management over relational database, and present our initial solutions of video data storage mechanism, video data access method and efficient video analytics. We also illustrate our ongoing prototype system HybVideo that developed in a novel architecture. It integrates above solutions to tackle the major challenges of providing a platform for both storage and analysis of video data.

关键词： Relational databases Memory Videoconference Laboratories Engines data analysis Performance analysis Video surveillance Conference management knowledge management

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Geometric Routing Precluding Loops and Dead Ends in 3-D Wireless Sensor Networks

Geometric Routing Precluding Loops and Dead Ends in 3-D Wire...

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2010 IEEE Global Telecommunications Conference GLOBECOM 2010

作者： Jun Duan Deying Li Wenping Chen Key Laboratory of Data Engineering and Knowledge Engineering MOE School of Information Renmin University of China Beijing China

Numerous algorithms on geometric networks has been studied, and most of them were based on 2-dimensional networks. But 2-dimensional geometric routing algorithms cannot be directly adapted to the 3-dimensional networks. In this paper, we propose routing algorithms based on the iteration of specific angles on the networks of Delaunay Triangulation in 3D space, and prove the certainty of data transmission of our routing algorithms. In the algorithms, the messages only need to carry information of O(1) nodes and each node just keeps 1-hop neighbors' information.

关键词： Routing Peer to peer computing Three dimensional displays Algorithm design and analysis Compass Wireless sensor networks Relays

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An extensible Hash function construction based on embedded chaos maps

An extensible Hash function construction based on embedded c...

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10th IEEE International Conference on Computer and information technology, CIT-2010, 7th IEEE International Conference on Embedded Software and Systems, ICESS-2010, 10th IEEE Int. Conf. Scalable Computing and Communications, ScalCom-2010

作者： Zhang, Xiaohong Yang, Yixian Li, Lixiang Peng, Haipeng State Key Laboratory of Networking and Switching Technology Information Security Center Beijing University of Posts and Telecommunications P. O. Box 145 Beijing 100876 China School of Information Engineering Jiangxi University of Science and Technology Ganzhou 341000 China

ISBN: (纸本)9780769541082

Based on chaotic Tent map, this paper proposed a new 5×L (L ≥ 32) bits extensible Hash function with symmetric keys. The structure only performed Boolean algorithm and shift operation. In order to generate fast diffusion, confusion and avalanche effect, Chaos series were embedded in the whole algorithm. The security against statistical attack, birthday attack were analyzed in detail. Many simulations were shown that the Hash value was highly sensitive to initial condition and parameter, and also to a message bit. Performance comparisons with MD5 showed that this scheme was a feasible scheme, and can be applied in e-commerce. © 2010 IEEE.

关键词： Hash functions

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Trust Service Discovery by Opinions Classification on Virtual Communities

Trust Service Discovery by Opinions Classification on Virtua...

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International Conference on Networks Security, Wireless Communications and Trusted Computing, NSWCTC

作者： Qing Zhu Department of Computer Science Information School Key Laboratory of Data Engineering and Knowledge Engineering Renmin University of China Beijing China

ISBN: (纸本)9781424465972;9780769540115

Internet has become an excellent ecommerce platform for bringing together large numbers of buyers and sellers across wide geographic regions. Trust and reputation systems represent a. significant trend in decision support for Internet mediated service provision. However, most existing work assumes that all users have the same trust metrics, but in real life different users often have different preference of product attributes. This paper proposes trusted query navigation model by analyzing online customer reviews of trustworthiness of websites. The first step analyzes counting history feedback in the system offline and generates dynamic trust model by opinion classification. The second step presents trust evaluation ranking to help the user can easily discovery trust service of matching his needs. The experimental evaluation shows that the trusted query evaluation ranking has high trading efficiency, quick learning ability and satisfactory performance.

关键词： Business Feedback Portals History Web services Computer security data security information security Wireless communication Computer networks

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Law Text Clustering Based on Referential Relations

Law Text Clustering Based on Referential Relations

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ChinaGrid Annual Conference (ChinaGrid)

作者： Biao Fan Tao Liu He Hu Xiaoyong Du Ministry of Education Key Laboratory of Data Engineering and Knowledge Engineering China School of Information Renmin University of China Beijing China

This paper proposes a new method to cluster law texts based on referential relation of laws. We extract law entities (an entity represents a law) and their referential relation from law texts. Then SimRank algorithm is applied to calculate law entity's similarity through referential relation and law clustering is carried out based on the SimRank similarity. This is the first time to apply SimRank algorithm in the domain of Law and use it to carry out text clustering. Prototype and experiments show that our solution is feasible. We also publish the extracted data as Linked Law data with RDF data model, which forms the first open semantic web database in Law domain. Linked Law data enables user to access law data with rich data links and query web data by application interface of Semantic Web.

关键词： Clustering algorithms Heuristic algorithms databases Algorithm design and analysis Resource description framework data mining Semantics

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ParaCube: A Scalable OLAP Model Based on Distributed Aggregate Computing with Sibling Cubes

ParaCube: A Scalable OLAP Model Based on Distributed Aggrega...

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International Asia-Pacific Web Conference (APWEB)

作者： Yansong Zhang Shan Wang Wei Huang Key Laboratory of Ministry of Education of Data Engineering and Knowledge Engineering Beijing China School of Information Renmin University of China Beijing China

The requirements of OLAP applications increase rapidly by dramatically increased data volume, users, query volume and query complexity. The requirement for shortening update period in data warehouse is another crucial factor for a scalable OLAP application. In this paper, we propose a scalable OLAP prototype to support the query processing with increasing data volume by distributing the whole fact tuples to multiple servers to construct a set of sibling cubes which can be merged together to obtain the whole cube. We employ a light weight distribution policy with fully duplicated dimension tables in each sibling server on the observation of very low proportion of space cost for dimension tables. OLAP query with distributed aggregate functions can be transformed into queries to be performed parallel in sibling servers. For non-distributed computing aggregate functions, such as median, the optimized median aggregate computing algorithm is proposed to reduce transmission volume between servers while computing the global median values. We also present a three-level framework in data warehouse to meet the requirement of shorter update period in "operational business intelligence". An asynchronous tunnel model is proposed to reduce update latency by pre-fetching updated tuples to OLAP processing server. Finally, we set up prototype system ParaCube to evaluate performance in SN (shared-nothing) system and multi-core platforms.

关键词： Aggregates Distributed computing Concurrent computing data warehouses Merging Application software Prototypes Query processing Acceleration Material storage

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Query-Aware Complex Object Buffer Management in XML information Retrieval

Query-Aware Complex Object Buffer Management in XML Informat...

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International Asia-Pacific Web Conference (APWEB)

作者： Qiushi Li Qiuyue Wang Shan Wang Key Laboratory of Ministry of Education of Data Engineering and Knowledge Engineering Beijing China School of Information Renmin University of China Beijing China

In this paper, we analyse the data access characteristics of a typical XML information retrieval system and propose a new query aware buffer replacement algorithm based on prediction of Minimum Reuse Distance (MRD for short). The algorithm predicts an object's next reference distance according to the retrieval system's running status and replaces the objects that have maximum reuse distances. The factors considered in the replacement algorithm include the access frequency, creation cost, and size of objects, as well as the queries being executed. By taking into account the queries currently running or queuing in the system, MRD algorithm can predict more accurately the reuse distances of index data objects.

关键词： information management XML information retrieval Tree data structures Indexing Prediction algorithms Algorithm design and analysis Frequency data analysis information analysis

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Performance study on logging to another main memory database

Performance study on logging to another main memory database

引用

International Conference on New Trends in information and Service Science, NISS

作者： Xiongpai Qin Xiaoyun Zhou Key Laboratory of Data Engineering and Knowledge Engineering School of Information Renmin University of China Beijing 100872 China Department of Computer Science and Technology Xuzhou Normal University Jiangsu 221008 China

In update intensive main memory database applications, huge volume of log records is generated, to maintain the ACID properties of the database system, the log records should be persistent efficiently. Delegating logging of one main memory database to another main memory database is proposed. The scheme is elaborated in detail in terms of architecture, logging & safeness levels, checkpointing, and recovery. Strict durability and relax durability are provided. When some form of non-volatile memory is used to temporarily holding log records, not only logging efficiency is improved, but also the scheme could guarantee full ACID of the system. We also propose using parallel logging to speedup log persistence by writing logs to multiple disks in parallel. Since interconnection network techniques progress by leaps and bounds, the scheme eliminates the concern about whether the system's overall performance may be slowed down by bandwidth and latency limitations. Experiment results demonstrate the feasibility of the proposal.

关键词： Checkpointing database systems Transaction databases Network servers Availability Nonvolatile memory Writing Communication industry Defense industry Wood industry

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Study in retrieval visibility and optical thickness of fog with MODTRAN

Study in retrieval visibility and optical thickness of fog w...

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International Conference on Multimedia technology

作者： Zhang, Wengang Wei, Ming Yu, Tao Wang, Gengke Lai, Jibao Wang, Yuqing Key Laboratory of Meteorological Disaster of Ministry of Education Earth System Remote Sensing Institute Nanjing University of Information Science and Technology Nanjing 210044 China Center for National Space-borne Demonstration Beijing 100101 China Institute of Data and Knowledge Engineering Henan University Kaifeng Henan 475001 China Binjiang College Nanjing University of Information Science and Technology Nanjing 210044 China

ISBN: (纸本)9781424478743

In recent years, many scientists have done some work in monitoring the fog, and achieved fruitful results. Now we want to conduct more in-depth study. In this paper, we utilize MODTRAN to simulate the relationship between transmittance and visibility, height of fog. By fitting the relationship between them, we get the formula that calculates visibility of fog using transmittance and height of fog. The correlation coefficient of this formula is very high, so it can be regarded as an accuracy one. The height of fog can be calculated by top temperature of fog, surface temperature and vertical lapse rate. The transmittance of the fog can be measured by using special instrument. Therefore, the visibility and optical thickness can be retrieved by this method. ©2010 IEEE.

关键词： Visibility

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Notice of Retraction: knowledge management technologies and applications: A literature review

Notice of Retraction: Knowledge management technologies and ...

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IEEE International Conference on Advanced Management Science (ICAMS)

作者： Xiaomi An Wang Wang Key Laboratory of Data Engineering and Knowledge Engineering Renmin University of China Beijing China School of Information Resource Management Renmin University of China Beijing China

This article has been retracted by the publisher.

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