In this paper, we present a client-server system for 3D scene change detection. A 3D scene point cloud which stored on the server is reconstructed by (structure-from-motion) SfM technique in advance. On the other hand...In this paper, we present a client-server system for 3D scene change detection. A 3D scene point cloud which stored on the server is reconstructed by (structure-from-motion) SfM technique in advance. On the other hand, the client system in tablets captures query images and sent them to the server to estimate the change area. In order to find region of change, an existing change detection method has been applied into our system. Then the server sends detection result image back to mobile device and visualize it. The result of system test shows that the system could detect change cor- rectly.展开更多
The security issue is always the most important concern of networked client-server application. On the putpose to build the secure group communication among of a group of client users and one server, in this paper, we...The security issue is always the most important concern of networked client-server application. On the putpose to build the secure group communication among of a group of client users and one server, in this paper, we will present a new password-based group key agreement protocol. Our protocol will meet simplicity, efficiency, and many desired security properties.展开更多
The design and implementation of EATS, a machine translation system for e-mail, are presented. It first puts forward the notion of “instant machine translation service" and illustrates how it is provided through...The design and implementation of EATS, a machine translation system for e-mail, are presented. It first puts forward the notion of “instant machine translation service" and illustrates how it is provided through client-server mode in EATS. Then this paper gives a panoramic view of the realization of Chinese-English bi-directional translation module through multi-engine strategy. The prototype of the system has been successfully demonstrated in campus net in PPP mode, with 70%～80% translation accuracy.展开更多
The client server mode conforms to the trend of the development of MIS. Based on a project of the Guangzhou Power Supply Bureau, the research method and optimization strategy of MIS are put forward using the client ...The client server mode conforms to the trend of the development of MIS. Based on a project of the Guangzhou Power Supply Bureau, the research method and optimization strategy of MIS are put forward using the client server computation mode in a power system enterprise. The structure and function are also introduced.展开更多
由于油气勘探开发中井下高温高压和复杂压力系统导致钻井过程面临的风险日益增大,因此迫切需要一款集工况数据模拟计算与井下复杂监测控制相结合的软件系统,助力实现安全高效钻井。为此,运用先进的控压钻井技术,实时监测井底压力、钻井...由于油气勘探开发中井下高温高压和复杂压力系统导致钻井过程面临的风险日益增大,因此迫切需要一款集工况数据模拟计算与井下复杂监测控制相结合的软件系统,助力实现安全高效钻井。为此,运用先进的控压钻井技术,实时监测井底压力、钻井液循环出入口流量差和密度等关键参数的变化,分析井下工况的变化,实现在钻井过程中井筒压力的快速、准确控制,有效降低钻井过程的安全隐患,及早发现并快速控制井下复杂情况,为形成预测、预控和快速处置的井筒安全提供支持。设计的控压钻井计算模拟与控制软件旨在从录井、PWD(Pressure While Drilling)、MWD(Measure While Drilling)、控压等设备获取钻井相关信息,建立水力学模型计算井筒压力、流量等参数。通过采用客户端/服务端网络架构,实现了多个客户端同时连接一个服务端,达到客户端数据同步的效果,经现场验证既可满足单机使用,又可方便网络连接,实现后方集中分析处理与远程操控。结果表明,该软件能准确地模拟计算各种钻井参数,保证安全高效钻井。实现了控压钻井由现场工程师处理模式转变为后方基于数据平台的模式,奠定了1个平台对N个现场控压钻井装备之间的互联互通基础,有力推动了控压钻井的智能化发展。展开更多
文摘In this paper, we present a client-server system for 3D scene change detection. A 3D scene point cloud which stored on the server is reconstructed by (structure-from-motion) SfM technique in advance. On the other hand, the client system in tablets captures query images and sent them to the server to estimate the change area. In order to find region of change, an existing change detection method has been applied into our system. Then the server sends detection result image back to mobile device and visualize it. The result of system test shows that the system could detect change cor- rectly.
基金Supported by the National Natural Science Foun-dation of China (60572155) the National Natural Science Founda-tion of China for Distinguished Young Scholars (60225007)
文摘The security issue is always the most important concern of networked client-server application. On the putpose to build the secure group communication among of a group of client users and one server, in this paper, we will present a new password-based group key agreement protocol. Our protocol will meet simplicity, efficiency, and many desired security properties.
文摘The design and implementation of EATS, a machine translation system for e-mail, are presented. It first puts forward the notion of “instant machine translation service" and illustrates how it is provided through client-server mode in EATS. Then this paper gives a panoramic view of the realization of Chinese-English bi-directional translation module through multi-engine strategy. The prototype of the system has been successfully demonstrated in campus net in PPP mode, with 70%～80% translation accuracy.
文摘The client server mode conforms to the trend of the development of MIS. Based on a project of the Guangzhou Power Supply Bureau, the research method and optimization strategy of MIS are put forward using the client server computation mode in a power system enterprise. The structure and function are also introduced.
文摘由于油气勘探开发中井下高温高压和复杂压力系统导致钻井过程面临的风险日益增大,因此迫切需要一款集工况数据模拟计算与井下复杂监测控制相结合的软件系统,助力实现安全高效钻井。为此,运用先进的控压钻井技术,实时监测井底压力、钻井液循环出入口流量差和密度等关键参数的变化,分析井下工况的变化,实现在钻井过程中井筒压力的快速、准确控制,有效降低钻井过程的安全隐患,及早发现并快速控制井下复杂情况,为形成预测、预控和快速处置的井筒安全提供支持。设计的控压钻井计算模拟与控制软件旨在从录井、PWD(Pressure While Drilling)、MWD(Measure While Drilling)、控压等设备获取钻井相关信息,建立水力学模型计算井筒压力、流量等参数。通过采用客户端/服务端网络架构,实现了多个客户端同时连接一个服务端,达到客户端数据同步的效果,经现场验证既可满足单机使用,又可方便网络连接,实现后方集中分析处理与远程操控。结果表明,该软件能准确地模拟计算各种钻井参数,保证安全高效钻井。实现了控压钻井由现场工程师处理模式转变为后方基于数据平台的模式,奠定了1个平台对N个现场控压钻井装备之间的互联互通基础,有力推动了控压钻井的智能化发展。
