作者机构：
Wuhan Univ Technol, Sch Nat Sci, Wuhan 430079, Peoples R China.;Huazhong Normal Univ, Dept Informat Management, Wuhan 430079, Peoples R China.;Huazhong Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.;[Wan, MF] School of Natural Science, Wuhan University of Technology,Wuhan 430079, China;[Chen, JH] Department of Information Management, Huazhong Normal University,Wuhan 430079, China
通讯机构：
[Wan, M.-F.] S;School of Natural Science, Wuhan University of Technology, China
摘要：
In recent years there were series of cases about copyright infringement concerning search engine in China. How to avoid the copyright risk is very important for search engine service providers to operate their business. At present, there are normally four kinds of copyright infringing activities related to search engine. This paper separately analyzed the technological principles and infringing activities of the four search engine services: Snapshot of Web Page, Temporary Link, Hostile Plug-In, Search List, and then gave corresponding solutions how to avoid the infringing risk. Finally some macro suggestions for resolving copyright infringement of search engine were put forward from the three perspectives of search engine service provider, government supervision and legislation.
作者：
Jinsong Gao;Fangfang Li;Zequn Guan;Xingliang Mao
期刊：
Proceedings of SPIE - The International Society for Optical Engineering,2005年6045:85-94 ISSN：0277-786X
通讯作者：
Gao, J.(jsgao@public.wh.hb.cn)
作者机构：
[Jinsong Gao] Department of Information Management, Huazhong Normal University, Wuhan 430079, China;[Jinsong Gao; Xingliang Mao; Zequn Guan; Fangfang Li] School of Remote Sensing and Information Engineering, Wuhan University, Wuhan, 430079, China
通讯机构：
Department of Information Management, Huazhong Normal University, China
会议名称：
MIPPR 2005 : geospatial information, data mining, and applications : 31 October-2 November 2005, Wuhan, China
会议时间：
2005
会议地点：
Wuhan, China
会议论文集名称：
MIPPR 2005 : geospatial information, data mining, and applications : 31 October-2 November 2005, Wuhan, China
关键词：
Agent;Grid;Remote sensing;Service;Wireless
摘要：
The existing technologies for remote sensing image processing are rather limited in both the capability of processing large amount of data and the methods for image processing. Applying wireless and grid technologies to remote sensing information processing, this paper puts forward a remote sensing application services model based on wireless service grid technology, with agent technology being one of the main technologies. The agent takes on users' tasks submission, transmission, processing, executing, and results retrieval. The grid is constructed by combining the wired net and wireless net. Single node failure doesn't influence the running of whole grid. Every grid service server can be supported with some service realization nodes downward, which can themselves be supported with some sub-nodes downwards. This model is validated by an experiment, and it is confirmed that this model can adapt to a huge amount of remote sensing information service requests. With the service speed and efficiency enhanced greatly, this model is expected to be widely applicable.
期刊：
Journal of Systems Architecture,2005年51(1):45-61 ISSN：1383-7621
通讯作者：
Wang, HY
作者机构：
[Li, GH; Wang, HY] Huazhong Univ Sci & Technol, Coll Comp Sci & Technol, Wuhan 430074, Hubei, Peoples R China.;[Wang, HY] Cent China Normal Univ, Dept Informat & Technol, Wuhan 430079, Hubei, Peoples R China.
通讯机构：
[Wang, HY] C;Cent China Normal Univ, Dept Informat & Technol, Wuhan 430079, Hubei, Peoples R China.
关键词：
Mobile computing system;Concurrent checkpointing algorithm;Consistent global checkpoint
摘要：
In distributed computing systems, processes in different hosts take checkpoints to survive failures. For mobile computing systems, due to certain new characteristics such as mobility, low bandwidth, disconnection, low power consumption and limited memory, conventional distributed checkpointing schemes need to be reconsidered. In this paper, a novel min-process coordinated checkpointing algorithm that makes full use of the computation ability and power of mobile support stations is proposed. During normal computation message transmission, the checkpoint dependency information among mobile hosts is recorded in the corresponding mobile support stations. When a checkpointing procedure begins, the initiator concurrently informs relevant mobile hosts, which minimizes the identifying time. Moreover, compared with the existing coordinated checkpointing schemes, our algorithm blocks the minimum number of mobile support stations during the identifying procedure, which leads to the improvement of the system performance. In addition, the proposed algorithm is a min-process, domino-free checkpointing algorithm, which is especially desirable for mobile computing systems. Quantitative analysis and experimental simulation show that our algorithm outperforms other coordinated checkpointing schemes in terms of the identifying time and the number of blocked mobile support stations and then can provide a better system performance for mobile computing systems.
