Veloce平台在大规模SOC仿真验证中的应用

随着现代集成电路技术的发展,尤其是IP的大量使用,芯片的规模越来越大,系统功能越来越复杂,普通的EDA和FPGA仿真在速度和性能上已经无法胜任芯片仿真验证的要求,功能验证已经成为大规模芯片设计的一个瓶颈;同时复杂的SOC系统需要相应的软件,由于芯片研发的周期越来越长,传统的软硬件顺序开发的方式受到了市场压力的巨大挑战,软硬件并行开发成为将来大规模Ic系统设计的一大趋势。本文主要介绍Mentor Graphics公司Veloce验证平台在超大规模IC系统中仿真验证的应用。借助Veloce的高速和大容量的特性,极大的提高功能验证的效率,解决由于芯片规模大FPGA无法验证的问题,保证芯片的按时投片。同时通过和Jtag的联合使用,成功解决软硬件的联合仿真和并行开发。     

A field operational test on valve-regulated lead-acid absorbent-glass-mat batteries in micro-hybrid electric vehicles. Part I. Results based on kernel density estimation

In March 2007 the BMW Group has launched the micro-hybrid functions brake energy regeneration (BER) and automatic start and stop function (ASSF). Valve-regulated lead-acid (VRLA) batteries in absorbent glass mat (AGM) technology are applied in vehicles with micro-hybrid power system (MHPS). In both part I and part II of this publication vehicles with MHPS and AGM batteries are subject to a field operational test (FOT). Test vehicles with conventional power system (CPS) and flooded batteries were used as a reference. In the FOT sample batteries were mounted several times and electrically tested in the laboratory intermediately. Vehicle- and battery-related diagnosis data were read out for each test run and were matched with laboratory data in a data base. The FOT data were analyzed by the use of two-dimensional, nonparametric kernel estimation for clear data presentation.The data show that capacity loss in the MHPS is comparable to the CPS. However, the influence of mileage performance, which cannot be separated, suggests that battery stress is enhanced in the MHPS although a battery refresh function is applied. Anyway, the FOT demonstrates the unsuitability of flooded batteries for the MHPS because of high early capacity loss due to acid stratification and because of vanishing cranking performance due to increasing internal resistance. Furthermore, the lack of dynamic charge acceptance for high energy regeneration efficiency is illustrated. Under the presented FOT conditions charge acceptance of lead-acid (LA) batteries decreases to less than one third for about half of the sample batteries compared to new battery condition. In part II of this publication FOT data are presented by multiple regression analysis (Schaeck et al., submitted for publication [1]).     

ICE与CORBA的比较及应用分析

文章从技术特点的角度比较和分析了ICE与CORBA之间的异同点,阐述了ICE的特点和优势。同时,通过基于ICE的分布式煤矿监控系统集成这一实例,进一步分析了ICE的技术优势。     

微机设备故障诊断系统的开发与实现

本文论述了以线仿真器（ICE）为载体,开发微机设备故障诊断系统;重点介绍了本系统的框架设想和实现方法。为设备的检测和维修工作实行自动化开辟了一条新的途径,     

基于多特征的SAR图像多尺度无监督分割

提出一种基于多特征的SAR图像多尺度无监督分割方法.该方法采用隐Markov树(hidden Markov tree,HMT)模型对SAR图像的灰度数据与标准差数据分别建模并分割,由两个分割结果提取SAR图像的结构性信息,并根据结构性信息,对灰度分割的后验概率进行平滑,最终的分割结果表明,该方法在很少损失结构性信息的基础上,能得到更光滑的分割结果.     

嵌入式系统调试方法的分析与比较

调试是嵌入式系统开发过程中必不可少的重要环节,它占整个开发时间的20%～50%.本文对常用的调试方法进行了介绍,分析与比较了调试方法及其调试工具的特点,为在不同条件下选择合适的调试工具提供了参考,有助于嵌入式系统调试性能的提高.     

基于ICE方式的语音通信原理研究与应用

基于IP的语音通信在复杂的网络环境中,最大的一个困难就是如何穿越各种各样的NAT。目前比较常见的解决方案有STUN、TURN、Proxy等,但是它们在兼容性以及通用性上都有很大的局限。本文探讨了基于ICE方式的语音通信原理,在即时通信系统上实现了基于ICE方式的语音通信模块,测试了多种网络环境下的通话情况。     

ICE在网络管理中的应用研究

随着计算机网络的快速发展，超大规模异构网络的管理成为网络应用的一个瓶颈。文中介绍了最新的中间件技术——ICE，包括ICE的特点和性能。探讨了应用ICE技术集成SNMP，CMIP等现在流行网络管理系统的方案，并分析了其特点。文中还研究了采用ICE对网络QoS的实施和管理模型，并得出了ICE服务将是未来网络管理发展的趋势。ICE中间件技术是非常适合网络管理的。     

Hydrogen Supplied ICEs and Fuel Cells for Commercial Vehicles

In view of the limited availability of fossil fuels and the necessity to reduce the output of emissions of greenhouse gases in the long term, the transport sector needs efficient, environmentally compatible drive solutions. Hydrogen, as a clean and sustainable fuel, offers a high implementation potential and can be used both in internal combustion engines and in fuel cells. In urban deployment the fuel cell drive has specific advantages and is suitable for use in city buses. Integration of high‐power energy storage systems improves fuel consumption and can reduce the costs of the drive system. In May 2000 MAN presented its first fuel cell bus, which was successfully deployed in passenger transport in various cities. The next FC‐bus, using hybrid fuel cell propulsion, is planned under the framework of the Bavarian hydrogen project at Munich Airport and will be tested from spring 2004 on. The first deployment of pre‐series bus fleets with fuel cells using hydrogen as fuel can be expected from the end of this decade onwards.     

电力监控系统跨平台集成方案的研究与实现

在对异构系统信息集成模式分析的基础上,重点研究电力监控系统中的数据库跨平台访问技术,实现了异构环境下的分布式应用互联.电力监控系统的数据库访问服务经过中间件因特网通信引擎IcE的封装,对外提供通用的接口,在多种开发环境下,通过接口描述可以透明调用数据库访问服务,实现了异构系统之间共享类库的应用,同时解决了异构系统的互操作问题.