探讨了充分利用现有资源,使得运营商与信息服务提供商能够发挥各自优势,开展方便灵活的短消息增值业务;介绍了CMPP(ChinaMobilepoint to point,中国移动点对点协议)的定义、接口连接和消息处理机制;分析了GSM短消息增值业务的接口;详细...探讨了充分利用现有资源,使得运营商与信息服务提供商能够发挥各自优势,开展方便灵活的短消息增值业务;介绍了CMPP(ChinaMobilepoint to point,中国移动点对点协议)的定义、接口连接和消息处理机制;分析了GSM短消息增值业务的接口;详细论述了基于CMPP的一种GSM短消息增值业务通信服务程序的实现。展开更多
对基于中国移动CMPP3.0(China Mobile Peer to Peer)的短信平台的设计与开发进行了论述。文章以SMS网关的通信原理与开发为主要内容,对如何建立一个合理的软件架构,如何借助数据库管理系统提供的存储过程、作业调度等功能以及对TCP/IP...对基于中国移动CMPP3.0(China Mobile Peer to Peer)的短信平台的设计与开发进行了论述。文章以SMS网关的通信原理与开发为主要内容,对如何建立一个合理的软件架构,如何借助数据库管理系统提供的存储过程、作业调度等功能以及对TCP/IP编程、多线程及数据结构的等软件技术的介绍和应用进行了探讨。展开更多
In view of the movable hook structure on zero position,the traditional system could not recognize the zero scale.According to the essential requirements of the measurement,a new system based on machine vision was prop...In view of the movable hook structure on zero position,the traditional system could not recognize the zero scale.According to the essential requirements of the measurement,a new system based on machine vision was proposed.Standard datum planes and standard scales were designed as standard component,and the indication error can be calculated by comparing the standard component and the measured value between zero position and 500 mm scale.The alignment of scribed lines was realized by machine vision,and the float pixel equivalent method was applied in image process.Experimental results prove that this system meets the requirement of national standard steel tape verification regulation,and the repeatability of zero error can reach 0.006 mm after zero calibration.展开更多
In 3G networks upgraded with high speed packet access(HSPA) technology,the high access bandwidth and advanced mobile devices make it applicable to share large files among mobile users by peer-to-peer applications.To r...In 3G networks upgraded with high speed packet access(HSPA) technology,the high access bandwidth and advanced mobile devices make it applicable to share large files among mobile users by peer-to-peer applications.To receive files as quickly as possible is essential for mobile users in file sharing applications,since they are subject to unstable signal strength and battery failures.While many researches present peer-to-peer file sharing architectures in mobile environments,few works focus on decreasing the time spent in disseminating files among users.In this paper,we present an efficient peer-to-peer file sharing design for HSPA networks called efficient file sharing(EFS) for 3G networks.EFS can decrease the dissemination time by efficiently utilizing the upstream-bandwidth of mobile nodes.It uses an adaptive rearrangement of a node's concurrent uploading transfers,which causes the count of the node's concurrent uploading transfers to lower while ensuring that the node's upstream-bandwidth can be efficiently utilized.Our simulations show that,EFS achieves much less dissemination time than other protocols including Bullet Prime and a direct implementation of BitTorrent for mobile environments.展开更多
文摘探讨了充分利用现有资源,使得运营商与信息服务提供商能够发挥各自优势,开展方便灵活的短消息增值业务;介绍了CMPP(ChinaMobilepoint to point,中国移动点对点协议)的定义、接口连接和消息处理机制;分析了GSM短消息增值业务的接口;详细论述了基于CMPP的一种GSM短消息增值业务通信服务程序的实现。
文摘对基于中国移动CMPP3.0(China Mobile Peer to Peer)的短信平台的设计与开发进行了论述。文章以SMS网关的通信原理与开发为主要内容,对如何建立一个合理的软件架构,如何借助数据库管理系统提供的存储过程、作业调度等功能以及对TCP/IP编程、多线程及数据结构的等软件技术的介绍和应用进行了探讨。
文摘In view of the movable hook structure on zero position,the traditional system could not recognize the zero scale.According to the essential requirements of the measurement,a new system based on machine vision was proposed.Standard datum planes and standard scales were designed as standard component,and the indication error can be calculated by comparing the standard component and the measured value between zero position and 500 mm scale.The alignment of scribed lines was realized by machine vision,and the float pixel equivalent method was applied in image process.Experimental results prove that this system meets the requirement of national standard steel tape verification regulation,and the repeatability of zero error can reach 0.006 mm after zero calibration.
基金the National High Technology Research and Development Program (863) of China (No.2007AA01Z457)the Science and Technology Youth Qi-ming-xing Program of Shanghai (No.07QA14033)
文摘In 3G networks upgraded with high speed packet access(HSPA) technology,the high access bandwidth and advanced mobile devices make it applicable to share large files among mobile users by peer-to-peer applications.To receive files as quickly as possible is essential for mobile users in file sharing applications,since they are subject to unstable signal strength and battery failures.While many researches present peer-to-peer file sharing architectures in mobile environments,few works focus on decreasing the time spent in disseminating files among users.In this paper,we present an efficient peer-to-peer file sharing design for HSPA networks called efficient file sharing(EFS) for 3G networks.EFS can decrease the dissemination time by efficiently utilizing the upstream-bandwidth of mobile nodes.It uses an adaptive rearrangement of a node's concurrent uploading transfers,which causes the count of the node's concurrent uploading transfers to lower while ensuring that the node's upstream-bandwidth can be efficiently utilized.Our simulations show that,EFS achieves much less dissemination time than other protocols including Bullet Prime and a direct implementation of BitTorrent for mobile environments.
