Currently, smart card based remote user authentication schemes have been widely adopted due to their low cost and convenient portability. With the purpose of using various different internet services with single regis...Currently, smart card based remote user authentication schemes have been widely adopted due to their low cost and convenient portability. With the purpose of using various different internet services with single registration and to protect the users from being tracked, various dynamic ID based multi-server authentication protocols have been proposed. Recently, Li et al. proposed an efficient and secure dynamic ID based authentication protocol using smart cards. They claimed that their protocol provides strong security. In this paper, we have demonstrated that Li et al.’s protocol is vulnerable to replay attack, denial of service attack, smart card lost attack, eavesdropping attack and server spoofing attacks.展开更多
This paper presents a multi-interface embedded server architecture for remote real-time monitoring system and distributed monitoring applications. In the scheme,an embedded microprocessor( LPC3250 from NXP) is chosen ...This paper presents a multi-interface embedded server architecture for remote real-time monitoring system and distributed monitoring applications. In the scheme,an embedded microprocessor( LPC3250 from NXP) is chosen as the CPU of the embedded server with a linux operation system( OS) environment. The embedded server provides multiple interfaces for supporting various application scenarios. The whole network is based on local area network and adopts the Browser / Server( B / S) model. The monitoring and control node is as a browser endpoint and the remote node with an embedded server is as a server endpoint. Users can easily acquire various sensors information through writing Internet protocol address of remote node on the computer browser. Compared with client / server( C / S) mode,B / S model needs less maintain and can be applicable to large user group. In addition,a simple network management protocol( SNMP) is used for management of devices in Internet protocol( IP) networks. The results of the demonstration experiment show that the proposed system gives good support to manage the network from different user terminals and allows the users to better interact with the ambient environment.展开更多
目的研究定时作业和多作业协调机制在SQL Server 2005数据库系统中的实现方法.方法采用定时作业和多作业协调机制来有效地优化系统资源,设计基于多定时作业协调方式的管理系统软件及硬件结构方案;使用了两种多作业协调的方法.结果以某...目的研究定时作业和多作业协调机制在SQL Server 2005数据库系统中的实现方法.方法采用定时作业和多作业协调机制来有效地优化系统资源,设计基于多定时作业协调方式的管理系统软件及硬件结构方案;使用了两种多作业协调的方法.结果以某大型矿山B/S企业综合系统为例,建立了以多作业协调机制为核心的后台数据库动态管理系统,通过在定时作业中调用存储过程对系统数据库中的数据进行整理、备份、更新和汇总运算,并运用多作业协调机制实现多个定时作业的高效执行.结论工程应用证明在大型数据库系统中,多作业协调机制可以有效地解决数据冗余问题,提高了系统响应速率.展开更多
为了提高地理信息系统(geographic information system,GIS)Server的稳定性、易开发性和扩展性,提出基于插件技术多进程模式GIS Server的解决方案.服务器模型由进程调度管理模块和执行进程组成,利用资源分配解决多用户并发操作的问题....为了提高地理信息系统(geographic information system,GIS)Server的稳定性、易开发性和扩展性,提出基于插件技术多进程模式GIS Server的解决方案.服务器模型由进程调度管理模块和执行进程组成,利用资源分配解决多用户并发操作的问题.按照执行功能作用,服务器模型分为服务层、GIS操作层、用户管理层、执行进程和地图文档层5个模块.在实现方面,根据服务器响应请求的流程将功能实现的过程分解,提出功能插件化的设计思想,使其与服务器相对独立.该模型实现了负载均衡,运行更加稳定,采用插件和Web Service技术开发应用功能,更加简单高效.展开更多
HTTP动态流技术是Adobe公司伴随Flash Media Server 4.5推出的一项最新的HT-TP渐进下载技术,Flash Media Server 4.5能够将实时或预先录制的内容打包至可高速缓存的碎片中,这样可以支持完全的流媒体功能,结合HTTP动态流技术,充分利用现...HTTP动态流技术是Adobe公司伴随Flash Media Server 4.5推出的一项最新的HT-TP渐进下载技术,Flash Media Server 4.5能够将实时或预先录制的内容打包至可高速缓存的碎片中,这样可以支持完全的流媒体功能,结合HTTP动态流技术,充分利用现有的HTTP基础设施的优势,通过对视频源文件的特殊处理,可以将多比特率Flash流媒体内容更方便地呈现给流媒体用户,改善并提升用户的视频体验质量。展开更多
目的对评价中药色谱指纹图谱的37个多维多息特征参数进行数据挖掘，为利用计算机技术分析评价指纹图谱、建立标准的指纹图谱提供理论参考和实践探索。方法以SQL Server 2005 Business Intelligence Development Studio为操作平台，利用...目的对评价中药色谱指纹图谱的37个多维多息特征参数进行数据挖掘，为利用计算机技术分析评价指纹图谱、建立标准的指纹图谱提供理论参考和实践探索。方法以SQL Server 2005 Business Intelligence Development Studio为操作平台，利用现在已经很成熟的联机分析处理、数据挖掘技术及相关统计算法对10批次苦碟子注射液指纹图谱的37个多维多息特征参数进行挖掘。结果建立了数据挖掘模型，分析出对10批次苦碟子注射液评价影响较大的多维多息特征参数及相关分数，Fr（q），Fr，Ir（q），Ir，∑Ri，N，∑Ai，δ，A_geo，A_avg相关系数为1．0。得到较好苦碟子注射液指纹图谱的参数范围，∑Ai值在12853．6—12923．3内，A_geo值在127．6～128．4内，A_avg值在476．0～478．6内，Ir（q）值在1290．6～1292．4内，Fr值在2033．3—2039．8内，Fr（g）值在2191．3～2196．0内，∑尉值在279．4～281．3内，Ir值在1200．4～1205．1内等。结论通过Analysis Services自带的数据挖掘服务，使建立针对中药色谱指纹图谱数据挖掘模型成为了可能。对10批次苦碟子注射液37个多维多息特征参数进行挖掘可得到对评价影响较大的多维多息参数及参数范围，为今后苦碟子注射液指纹图谱评价提供依据。展开更多
Presents the robot soccer software simulation platform to be firstly used at FIRA Robot World Cup China 2001, introduces the system’s purpose and design plan; discusses the system core server configuration and workin...Presents the robot soccer software simulation platform to be firstly used at FIRA Robot World Cup China 2001, introduces the system’s purpose and design plan; discusses the system core server configuration and working principle; describes the operating method and how to develop competition strategy, and refers to the teams to take part in FIRA Robot World Cup China 2001 and investigators who are interested in the distributed multi agent system.展开更多
文摘Currently, smart card based remote user authentication schemes have been widely adopted due to their low cost and convenient portability. With the purpose of using various different internet services with single registration and to protect the users from being tracked, various dynamic ID based multi-server authentication protocols have been proposed. Recently, Li et al. proposed an efficient and secure dynamic ID based authentication protocol using smart cards. They claimed that their protocol provides strong security. In this paper, we have demonstrated that Li et al.’s protocol is vulnerable to replay attack, denial of service attack, smart card lost attack, eavesdropping attack and server spoofing attacks.
基金Sponsored by the National High Technology Research and Development Program(Grant No.2012AA02A604)
文摘This paper presents a multi-interface embedded server architecture for remote real-time monitoring system and distributed monitoring applications. In the scheme,an embedded microprocessor( LPC3250 from NXP) is chosen as the CPU of the embedded server with a linux operation system( OS) environment. The embedded server provides multiple interfaces for supporting various application scenarios. The whole network is based on local area network and adopts the Browser / Server( B / S) model. The monitoring and control node is as a browser endpoint and the remote node with an embedded server is as a server endpoint. Users can easily acquire various sensors information through writing Internet protocol address of remote node on the computer browser. Compared with client / server( C / S) mode,B / S model needs less maintain and can be applicable to large user group. In addition,a simple network management protocol( SNMP) is used for management of devices in Internet protocol( IP) networks. The results of the demonstration experiment show that the proposed system gives good support to manage the network from different user terminals and allows the users to better interact with the ambient environment.
文摘目的研究定时作业和多作业协调机制在SQL Server 2005数据库系统中的实现方法.方法采用定时作业和多作业协调机制来有效地优化系统资源,设计基于多定时作业协调方式的管理系统软件及硬件结构方案;使用了两种多作业协调的方法.结果以某大型矿山B/S企业综合系统为例,建立了以多作业协调机制为核心的后台数据库动态管理系统,通过在定时作业中调用存储过程对系统数据库中的数据进行整理、备份、更新和汇总运算,并运用多作业协调机制实现多个定时作业的高效执行.结论工程应用证明在大型数据库系统中,多作业协调机制可以有效地解决数据冗余问题,提高了系统响应速率.
文摘为了提高地理信息系统(geographic information system,GIS)Server的稳定性、易开发性和扩展性,提出基于插件技术多进程模式GIS Server的解决方案.服务器模型由进程调度管理模块和执行进程组成,利用资源分配解决多用户并发操作的问题.按照执行功能作用,服务器模型分为服务层、GIS操作层、用户管理层、执行进程和地图文档层5个模块.在实现方面,根据服务器响应请求的流程将功能实现的过程分解,提出功能插件化的设计思想,使其与服务器相对独立.该模型实现了负载均衡,运行更加稳定,采用插件和Web Service技术开发应用功能,更加简单高效.
文摘HTTP动态流技术是Adobe公司伴随Flash Media Server 4.5推出的一项最新的HT-TP渐进下载技术,Flash Media Server 4.5能够将实时或预先录制的内容打包至可高速缓存的碎片中,这样可以支持完全的流媒体功能,结合HTTP动态流技术,充分利用现有的HTTP基础设施的优势,通过对视频源文件的特殊处理,可以将多比特率Flash流媒体内容更方便地呈现给流媒体用户,改善并提升用户的视频体验质量。
文摘目的对评价中药色谱指纹图谱的37个多维多息特征参数进行数据挖掘，为利用计算机技术分析评价指纹图谱、建立标准的指纹图谱提供理论参考和实践探索。方法以SQL Server 2005 Business Intelligence Development Studio为操作平台，利用现在已经很成熟的联机分析处理、数据挖掘技术及相关统计算法对10批次苦碟子注射液指纹图谱的37个多维多息特征参数进行挖掘。结果建立了数据挖掘模型，分析出对10批次苦碟子注射液评价影响较大的多维多息特征参数及相关分数，Fr（q），Fr，Ir（q），Ir，∑Ri，N，∑Ai，δ，A_geo，A_avg相关系数为1．0。得到较好苦碟子注射液指纹图谱的参数范围，∑Ai值在12853．6—12923．3内，A_geo值在127．6～128．4内，A_avg值在476．0～478．6内，Ir（q）值在1290．6～1292．4内，Fr值在2033．3—2039．8内，Fr（g）值在2191．3～2196．0内，∑尉值在279．4～281．3内，Ir值在1200．4～1205．1内等。结论通过Analysis Services自带的数据挖掘服务，使建立针对中药色谱指纹图谱数据挖掘模型成为了可能。对10批次苦碟子注射液37个多维多息特征参数进行挖掘可得到对评价影响较大的多维多息参数及参数范围，为今后苦碟子注射液指纹图谱评价提供依据。
文摘Presents the robot soccer software simulation platform to be firstly used at FIRA Robot World Cup China 2001, introduces the system’s purpose and design plan; discusses the system core server configuration and working principle; describes the operating method and how to develop competition strategy, and refers to the teams to take part in FIRA Robot World Cup China 2001 and investigators who are interested in the distributed multi agent system.
