第三代移动通信终端业务引擎测试介绍

业务引擎测试是针对移动终端业务应用流程的测试。文章介绍了业务应用的标准化情况以及国际上业务应用和业务引擎测试系统的认证情况,并以彩信为例介绍了业务引擎测试的测试流程和测试实现。     

EWB软件在电路分析中的应用

文章通过设计与仿真积分器的实例，介绍一款虚拟电子工作台EBW5.0使用方法和操作要领，阐述其两种模拟仿真方法：一是仪表测试法，二是模拟分析法，同时验证电路实例的模拟响应，归纳仿真操作技巧。     

MPEG-21多媒体框架中的流媒体测试平台

测试平台是用来验证和试验某些方法的媒体研究引擎，这些方法确保实现在不同的网络条件、用户选择、终端设备性能下对媒体资源的内容访问。中描述了流媒体应用环境下用于仿真MPEG-21框架的测试平台的演进，并详细介绍了基于FGS单播视频流的测试平台模型。     

一种软件无线电与认知引擎的接口实现方法

该文主要讨论在基于软件无线电的认知系统中,软件无线电平台和认知引擎的接口实现。文中提出了一种基于XML语言描述的接口实现方法,并简单举例说明了如何对软件无线电平台处理能力和认知引擎配置参数进行描述,进而又阐述了软件定义无线电平台与认知引擎间的信息传递方式。文章为在软件定义无线电台上构建认知无线电提供了一种简单,可行的实现方法,同时提高了认知无线通信系统的开放性。     

浅析数字化时代实时渲染虚拟引擎技术在新闻报道中的设计与应用

随着虚拟引擎技术的不断发展,其在新闻报道及大型晚会中的应用也越来越广泛,实时渲染虚拟引擎技术不仅优化了电视节目制作流程,也带来了更丰富的视觉呈现效果。本文结合珠海航展和汽车盛典等节目中的应用,阐述了虚拟引擎技术在新闻报道中的设计思路及实现方法。     

MPEG-21多媒体框架中的流媒体测试平台

测试平台是用来验证和试验某些方法的媒体研究引擎,这些方法确保实现在不同的网络条件、用户选择、终端设备性能下对媒体资源的内容访问。文中描述了流媒体应用环境下用于仿真MPEG-21框架的测试平台的演进,并详细介绍了基于FGS单播视频流的测试平台模型。     

基矛PHP安全模板引擎的设计与实现

本文提出了一种自定义的基于PHP模板引擎的安全设计方法，针对编译型模板引擎，总结了PHP中的不安全的因素，使用正则匹配实现对编译模板安全过滤，提高了模板引擎的安全性。     

J2ME手机游戏引擎的设计与实现

通过分析J2ME手机游戏的基本结构,设计了一个基于J2ME平台的手机游戏引擎,详细阐述了该引擎的功能及实现方案。摘要     

多计算机系统在用户线测试系统中的应用

阐述了多计算机系统在用户线测试系统设计中的应用，探讨了在实现过程中涉及的系统结构设计，分测试控制台设计，多计算机系统通信的实现等主要技术问题的解决方法。     

电源测试系统的设计和实现

介绍了一种基于虚拟仪器远程电源自动化测试系统，首先阐述了系统的工作原理，然后根据基本测试功能和主要技术指标设计了电源自动化测试系统，阐述了其组成模块测试接口箱和工控机测试装置的结构和设计方法。最后对测试系统软件进行了详细讨论。测试系统软件是在Windows环境下利用Borland C^ Builder5开发的，采用了模块化编程方法，该系统采取了抗干扰措施，大大提高了测试精度和测试效率，经过现场调试，现已投入运行，实现了电源系统的远程自动化测试。     

高压输电线路绝缘子在线测试

本文介绍了绝缘子污染的测量方法,表面电阻测量装置和泄漏电流检测装置,并取得一些结果.表明超高压线路绝缘子的绝缘在线监测是完全可行的.     

Design of computer controlled combustion engines

Globalization and growing new markets, as well as increasing emission and fuel consumption requirements, force the car manufacturers and their suppliers to develop new engine control strategies in shorter time periods. This can mainly be reached by development tools and an integrated hardware and software environment enabling rapid implementation and testing of advanced engine control algorithms.

The structure of a rapid control prototyping (RCP) system is explained, which allows fast measurement signal evaluation, and rapid prototyping of advanced engine control algorithms. A hardware-in-the-loop simulator for diesel engine control design is illustrated, simulation results for a 40 tons truck are presented. Providing efficient engine models for the proposed development tools, a dynamic local linear neural network approach is explained and applied for modelling the NO_x emission characteristics of a 1.9 l direct injection diesel engine. Furthermore the application of a RCP system is exemplified by the application of combustion pressure based closed-loop ignition timing control for a SI engine. Experimental results are shown for a 1.0 l SI engine on a dynamic engine test stand.     

航空发动机试验过渡态测试系统设计及应用

航空发动机试验中过渡态的各项参数,直接反映发动机性能的好坏及其控制系统的优劣,而且过渡态也易发生故障,因此航空发动机试验过渡态测试是一项十分重要的测试内容。发动机过渡态测试是监测、记录测量参数的实时变化,防止突变损坏发动机,为发动机设计研究和各参数的改进匹配提供真实可靠的依据,保证发动机过渡态的安全运行。     

基于 WirelessHART 协议的无线适配器设计

为解决传统HART仪表内数字信息不能被有效利用的问题,提出一种使用WirelessHART适配器对HART仪表进行升级的低成本方案。该适配器兼容有线HART协议和WirelessHART协议,其主要工作是获取HART仪表内的组态参数、过程参数、诊断以及校准等数字信息,并采用Wire—lessHART协议将获得的数据发送至wirelessHART网关,实现传统HART仪表和控制系统之间无线、双向数字通信。文中详细描述了该适配器的硬件设计原理和软件设计步骤,并给出开发原型的通信测试结果。     

Mechatronic design approach for engine management systems

Internal combustion engines with electronic management systems have developed to mechatronic systems. They basically consist of a thermodynamic process, electromechanic, hydraulic or pneumatic actuators, electronic sensors and one ore more digital control units with their specific software. In order to meet rising demands concerning drivability, emissions and consumption under the restriction of shorter development cycles, there is a rising need for modern identification methods (neural networks) and software/hardware tools (Rapid Control Prototyping (RCP), Hardware-in-the-Loop-Simulation) for the design of engine control units. In this contribution, a software/hardware environment for a mechatronic design approach for engine control systems is discussed. A dynamic engine test stand equipped with a RCP system is described which allows fast and comfortable design and testing of new control functions. Enlarged with an on-line indication system, a cylinder pressure based engine management system can be established, where the desired control settings are calculated by an upper level engine optimization. Time-variant optimization strategies for an improved exhaust-, consumption- and drivability performance were developed by means of adequate models of the engine behavior with fast neural networks.     

高功率微波车辆迫停的作用机理及效应试验

通过定量测定车辆电子控制单元喷油控制和点火信号的变化规律,揭示了微波导致发动机熄火的作用机理。试验结果表明,车辆在强电磁脉冲辐射条件下,电子控制单元喷油输出信号发生紊乱,点火信号意外丢失,发动机气缸内混入过量汽油造成火花塞无法点燃油气混合物,导致发动机被迫熄火。     

基于CAN总线的四路舵机控制器的研究

本文设计了一种基于CAN通信总线的新型舵机控制器.该控制器考虑了谐波传动的随速度波动和低阻尼特点,以提高舵机系统控制品质为目标,采用增量式分段PID算法产生PWM信号,对舵机随动系统进行实时精准控制,并通过CAN2.0总线接口实现了微型计算机与CPU之间的实时变量传送,方便了程序的调试.测试结果表明,该控制系统具有抗干扰性能好、控制品质优等特点.     

线簧插孔组装的送丝与分丝机构设计

以试验为基础，详细介绍了连接器组件线簧插孔在组装过程中送丝和分丝工艺的要求、特点以及工艺试验概况等。对影响送丝、分丝的因素及试验结果也进行了一些分析。介绍了最优的送丝和分丝机构。     

Fine pitch copper wire bonding in high volume production

Wire bonding is the predominant mode of interconnection in electronic packaging. Gold wire bonding has been refined again and again to retain control of interconnect technology due to its ease of workability and years of reliability data. Economic realities are now enabling fine diameter copper wire to compete with gold wire. It needs to be demonstrated however that known challenges in the assembly process and long term reliability can be managed successfully. Here, a rigorous methodology has been established to introduce copper wire bonding on new as well as converted dice into manufacturing. Manufacturing efficiencies and yields have been driven to be equivalent to gold wires. Reliability testing has passed the usual criteria and has been extended to demonstrate the viability of this technology. Interfacial analysis has confirmed the observations that intermetallic compounds form and grow slowly.     

A Microcomputer-Controlled Powertrain for a Hybrid Vehicle

The design and testing of a microcomputer-controlled powertrain for a hybrid (heat engine/electric) vehicle are described in this paper. The detailed control strategy used and its software implementation on the Intel 8086 microcomputer are discussed. The powertrain is made up of an electric motor, gasoline engine, automatic transmission with the torque converter removed, engine and electric motor clutches, and Hy-Vo transfer chains. The drive system has been installed in vehicles and tested on a chassis dynamometer. Test results show smooth shifting of the transmission and sequencing of the clutches in the different hybrid operating modes. The overall performance of the hybrid car is good, and driveability is comparable to a conventional automobile.