Optimal availability design of maintainable systems: illustrated with example of power systems

The theory of reliability optimum link allocation (ROLA) is a theory through which the ROLA in a system can be achieved in accordance with the reliability size relations of the system's links. This paper deals with its theory and application in maintainable systems after the reliability index has been extended into the availability index. In conclution its feasibility has been proved with the illustration of a pratical power system.     

移动阅读终端介绍及测试方法研究

基于对信息需求的硬性需求,随着通信技术、显示技术、数据版权和计算机技术的飞速发展,移动阅读悄然进入我们的生活,改变着我们传统的阅读方式,由此也产生了信息量无限大而又具备纸质阅读感受的移动阅读终端。本文首先对移动阅读终端的软、硬件和功能进行介绍,进而简要介绍移动阅读终端的测试方法,最后对移动阅读终端发展进行了展望。     

4G网络中位置服务业务解决方案

本文讨论如何综合考虑4G网络不同发展时期的网络特点和位置服务方案,给出在4G网络中部署位置服务增值业务解决方案的建议。     

智能终端发展关键技术探讨

智能终端产品(包括手机、平板和混合式的移动计算设备)在个人和商业应用场合大量使用,终端在高速计算能力方面更新迅猛,处理能力军备竞赛将陷入硬件瓶颈,同质现象成为现实,而人机交互技术、终端应用开发环境、终端安全云服务等将成为影响智能终端向纵深人群渗透和更商业化应用领域发展的决定要素。本文旨在探讨、分析和展示上述几个关键技术的新进展和演进趋势。     

Low-latency and low-overhead encoder ASIC in the ATLAS LAr calorimeter trigger upgrade

In this article, an encoder Application Specific Integrated Circuit (ASIC) for high-speed serial data transmission is presented. The ASIC implements a low-latency and low-overhead line code and is fabricated with a commercial 0.25-µm Silicon-on-Sapphire CMOS technology. The ASIC operates at 640 MHz with a latency of no greater than 6.25 ns and the overhead of 14.3%. The encoder will be integrated with a serialiser and will be used in the A Toroidal LHC ApparatuS Liquid Argon (LAr) calorimeter Phase-I trigger upgrade.     

Mathematical Models for Unstable Quantum Systems and Gamow States

We review some results in the theory of non-relativistic quantum unstable systems. We account for the most important definitions of quantum resonances that we identify with unstable quantum systems. Then, we recall the properties and construction of Gamow states as vectors in some extensions of Hilbert spaces, called Rigged Hilbert Spaces. Gamow states account for the purely exponential decaying part of a resonance; the experimental exponential decay for long periods of time physically characterizes a resonance. We briefly discuss one of the most usual models for resonances: the Friedrichs model. Using an algebraic formalism for states and observables, we show that Gamow states cannot be pure states or mixtures from a standard view point. We discuss some additional properties of Gamow states, such as the possibility of obtaining mean values of certain observables on Gamow states. A modification of the time evolution law for the linear space spanned by Gamow shows that some non-commuting observables on this space become commuting for large values of time. We apply Gamow states for a possible explanation of the Loschmidt echo.     

转变运维模式 迎接移动互联网新挑战

本文分析了移动互联网的网络特征和影响,提出移动互联网的资源占用与网络质量同样重要,一旦资源紧缺,质量将直线下滑。互联网时代只面向网络的优化已不能解决网络问题,而传统网络KPI指标已不能表征用户的业务使用感知。为此需要维护部门改变传统的运维理念,全面对接市场发展。     

用单端矢量网络分析仪测试手机RF电路的差分散射参数

本文以声表的测试为例,说明了采用单端矢量网络分析仪测试手机射频(RF)电路的差分散射参数的原理及方法,其中包含物理三端口的散射参数和模式三端口网络散射参数。     

基于Moodle和PhoneGap的移动学习客户端的设计与应用研究

本文将结合用户移动学习现状及偏好,确定移动学习客户端的系统需求,进而基于Moodle和PhoneGap平台,实现对移动学习客户端的设计,并将移动学习客户端应用到实际教学过程中,确定应用成效。     

移动视频业务的自适应资源预留方案

提出了一个拓扑独立且自适应的资源预留方案用以向移动视频业务提供服务品质保证.建议的方案通过研究移动节点累积的运动历史,总结出其运动特点,进而对节点的运动趋势进行预测.基于预测的结果,正在进行的移动视频业务所需的资源在移动节点未来最可能访问的子网中被预留.所提出的方案在向用户提供满意的移动视频业务的同时,保证了网络资源的充分利用,并降低了预留阻塞的可能性.