万兆以太网10GBASE-WX PHY研究

对万兆以太网１０ＧＢＡＳＥ－ＷＸ物理层技术进行了介绍,包括了物理编码子层,物理附件子层功能描述,并对关键的ＰＣＳ子层技术的实现进行详细的讨论,对有关的算法进行了分析。     

梁王山EAS阵列和地下μ子阵列联合运转的微机自动控制

本文详细介绍了用两个８２５５可编程序并行接口卡和一台ＰＣ／ＸＴ实现梁王山空气簇射阵列（ＥＡＳ阵列）和地下μ子阵列联合运转的方法，并对实现奖伦柯夫先陈列、ＥＡＳ阵列和地下μ子阵列三者联合运转作了进一步的分析。     

HDTV中的SDTV兼容视频显示系统电路设计与实现

提出一种基于Ｐｈｉｌｉｐｓ公司高性能数字视频编码器ＳＡＡ７１８５的数字视频ＰＡＬ／ＮＴＳＣ编码显示电路。它可接受四路信号,并行显示四路ＳＤＴＶ级数字电视。设计中采用ＴＭＳ３２０Ｃ２５作为主控,用ＡＬＴＥＲＡ的ＰＬＤ器件ＥＰＭ７０６４作控制逻辑。整个电路含有和ＰＣ机的接口,以利于调试和测试监控。     

梁王山EAS阵列和地下μ下阵列联合运转的微机自动控制

本文详细介绍了两个８２５５可编程序并行接口卡和一台ＰＣ／ＸＴ实现梁王山空气簇射阵列和地下μ子阵列联合运转的方法，并对实现契伦柯夫光阵列、ＥＡＳ阵列和地下μ子阵列三者联合运转作了进一步的分析。     

基于ODBC的AS／400和PC数据交换技术及其应用

本文讨论了基于ＯＤＢＣ技术实现ＡＳ／４００和ＰＣ数据交换的可能性，并介绍了ＯＤＢＣ的原理，最后给出了利用ＯＤＢＣ在ＡＳ／４００和ＰＣ之间进行数据交换的具体实现。     

MS—Windows中的异步远程过程调用

本文叙述了在ＭＳ－Ｗｉｎｄｏｗｓ环境下设计和实现的异步的，支持大数据量传输的远程过程调用系统－ＡＲＰＣ系统。文中说明了为什么要研制ＭＳ－Ｗｉｎｄｏｗｓ环境中的ＲＰＣ机制，描述了ＡＲＰＣ的特点，并详细介绍了ＡＲＰＣ的设计和实现。     

PowerPCASA1064位RISC微处理器

ＰｏｗｅｒＰＣＡＳ＾ＴＭＡ１０６４位ＲＩＳＣ微处理器是由４７０万个晶体管集成的性能微处理器，它采用ＩＢＭＣＭＯＳ５Ｌ０．５μｍ（工作电压变３伏）的４层金属ＡＳＩＣ新技术。在一个２１３ｍｍ＾２的晶片中，采用半定制设计方法实现了对ＰｏｗｅｒＰＣＡＣ体系结构的支持。通过采用定制宏（单元）以及多端口阵列技术，使芯片的密度和速度都有较大的提高。另外，还采用上锁相环电路来降低片到片时钟歪斜。通过体系结构平面规     

信息家电网络控制平台SOPCA

本文对信息家电网络控制平台ＳＯＰＣＡ的硬件环境和设备驱动的实现进行了研究。ＳＯＰＣＡ的硬件设备采用ＩＢＭ ＲｄｅＷｏｏｄⅢ机顶盒平台,其核心是数字ＳＴＢ集成控制芯片ＳＴＢ０１Ｘ０．Ｓｏｐｃａ软件系统有较好的模块化和可移植性处理,在其设备驱动设计部分,我们给出了解码功能的一个例的实现。     

也谈PC133内存

１、 ＰＣ１３３ ＳＤＲＡＭ内存规格 ＰＣ１３３ ＳＤＲＡＭ规范包含：内存条上电路的各部分线 长最大值与最小值;电路线宽与间距的精确规格;保证６层ＰＣＢ板制作（分别为：信号层、电源层、信号层、基层、信号层）,具备完整的电源层与地线层;具备每层电路板间距离的详细规格;精确符合发送、载入、终止等请求的时间;详细的ＥＥＰＲＯＭ编程规格;详细的ＳＤＲＡＭ组成规格;特殊的标记要求;电磁干扰抑制;可选镀金印刷电路板。 对于ＰＣ１３３规范来说,它的进一步要求是ｔＡＣ不超过５．４ｎｓ、ｔＣＫ 不超过７．５ｎｓ（对于Ｐ…     

基于DSP的高速数据采集与处理系统

介绍了一种基于ＴＭＳ３２０Ｃ３Ｘ ＤＳＰ芯片的数据采集及处理系统ＰＣ３１,包括ＰＣ３１的硬件特性和开发软件。ＰＣ３１另外扩展子卡ＧＲＡＢＢＥＲ３１,可使采样率达到１０ＭＨｚ。Ｚｕｍａ软件开发工具包使ＤＳＰ的开发过程大大简化。     

Performance modelling of pipelined circuit switching in hypercubes with hot spot traffic

Pipelined Circuit Switching (PCS) has been suggested as an efficient switching method for supporting interprocessor communication in multicomputer networks due to its ability to preserve both communication performance and fault-tolerant demands in these networks. A number of studies have demonstrated that PCS can exhibit superior performance characteristics over Wormhole Switching (WS) under uniform traffic. However, the performance properties of PCS have not yet been thoroughly investigated in the presence of non-uniform traffic. Analytical model of PCS for common networks (e.g., hypercube) under the uniform traffic pattern has been reported in the literature. A non-uniform traffic model that has attracted much attention is the hot spot model which leads to extreme network congestion resulting in serious performance degradation due to the tree saturation phenomenon in the network. An analytical model for WS with hot spot traffic has been reported in the literature. However, to the best of our knowledge, there has not been reported any analytical model for PCS augmented with virtual channels in the presence of hot spot traffic. This paper proposes a model for this switching mechanism using new methods to calculate the probability of message header blocking and hot spot rates on channels. The model makes latency predictions that are in good agreement with those obtained through simulation experiments. An extensive performance comparison using the new analytical model reveals that PCS performs the same or in some occasions worse than WS in the presence of hot spot traffic.     

Siemens PCS7系统在山东海化苯胺项目中的应用

本文简要介绍了西门子的分布式控制系统PCS7在山东海化天祥化工厂苯胺装置中的应用。PCS7作为西门子全集成自动化系统（TIA）的基础和底层，其良好的开放性和强大功能在本项目中得到了充分的应用，PCS7系统软件组态的方便性和多种工具的应用也为工程师在系统集成、组态和调试方面带来了诸多方便。本文着重介绍了本系统的两个关键技术环节：I／O冗余和Plant Bus控制环网监控。     

APT中通用爬坡控制器的设计

本文以天津石化公司涤纶厂新上的膜切二线的计算机控制装置为背景，探讨了在SIMATICPCS系统的控制站上利用APT语言进行通用爬坡控制器设计的可行性，并对四个爬坡控制进行了实施。现场投运证明，不仅效果良好，而且大量节省了控制站的内存使用空间，从而保证了整个控制程序内存的使用。     

Concept and System of Personification Control System

1 BackgroundIn About 35 hundred million years of the life evo-lution process, organism obtains the enormous optimiza-tion, "natural selection" biological world is the knowl-edge treasure and the study fountainhead of the techni-cal innovation. Displays in organism macroscopic andthe microscopic structure, the shape and the function,the energy and the material transformation, metabolism,the use system, the mode of motion and the behavior, theprocess and the mechanism of the heredity, duplicatio…     

The documentation of product configuration systems: A framework and an IT solution

When designing and maintaining a product configuration system (PCS), complete and up-to-date documentation of the system is needed in the form of a product model that outlines the structures, attributes, and constraints of the PCS. Furthermore, up-to-date documentation for the PCS is crucial for maintenance, further development, system quality and communication with domain experts. Product models are the main communication and documentation tools used in PCS projects. Recent studies have shown that up-to-date documentation for the PCS is often lacking due to the significant amount of work required to maintain product models. To address these challenges, this paper proposes an approach for documenting the PCS that is based on the structure, attributes, and constraints modelled within the PCS, in which the product model is generated directly from the PCS. The suggested approach avoids knowledge duplication, as knowledge needs to be maintained within the PCS only. It involves two steps: the first is the building of the initial product model, which is used for the programming of the PCS. In the second step, the product model is generated directly from the PCS and is based on the structure, attributes, and constraints inside the PCS. The product model does not need to be maintained, therefore, outside the PCS. This approach meets the demand for agile documentation and efficient communication with domain experts, and uses the fewest resources possible. Furthermore, to support the framework, an IT documentation system is proposed that is capable of retrieving knowledge from the PCS and thus generating the product model. Our framework and IT documentation system were developed and tested at a case company on five different projects. The results confirm that benefits can be achieved by using the proposed IT documentation system, as time and resources are saved, while the quality of the PCS is improved.     

A Parallel System of the Personification Control System On the Basis of Biology Functions

1 Biology and system science of hu-man bodyLooked from the modern system science viewpoint,the human body is precisely a complex great system.The biology research has already divided into the humanbody many levels, like system(Breath, digestion, bloodcirculation, nerve, uropoiesis, reproduction, movementand so on) tissue( connective tissue, fat tissue, epitheli-um tissue, muscular tissue, the nerve and so on)Cell(Cy-tobiology, cytochemistry, cytophysiology, cytogeneticsand so on)、molecule (M…     

Modelling and analysis of pipelined circuit switching in interconnection networks with bursty traffic and hot-spot destinations

Pipelined circuit switching (PCS) that combines the advantages of both circuit switching and wormhole switching is an efficient method for passing messages in interconnection networks. Analytical modelling is a cost-effective tool and plays an important role in achieving a clear understanding of the network performance. However, most of the existing models for PCS are unable to capture the realistic nature of message behaviours generated by real-world applications, which have a significant impact on the design and performance of communication networks. This paper presents a new analytical model for PCS in interconnection networks in the presence of bursty and correlated message arrivals coupled with hot-spot destinations, which can capture the bursty message arrival process and non-uniform distribution of message destinations. Such a traffic pattern has been found in many practical communication environments. The accuracy of the proposed analytical model is validated through extensive simulation experiments. The model is then applied to investigate the effects of the bursty message arrivals and hot-spot destinations on the performance of interconnection networks with PCS.     

单套网络与多套网络通信性能的比较与分析

目前,以单套网络作为通信系统的机群广泛应用于科学计算中,为了进一步提高机群计算处理能力,引入了多套网络作为机群通信系统。多套网络能够明显地提高机群的通信性能,但是怀疑其应用性能是否也有相应的提高。为了解决疑问,在GM通信系统的基础上实现了双套网络的通信系统(PCS),并全面而又具体地对GM和PCS进行性能比较,实验数据表明:在通信性能方面,PCS的带宽比GM提高了98.4%,而延迟只增加了0.3!s￣0.5!s;在应用性能方面,对于通信量比较大、大消息比较频繁的应用程序,PCS能够取得很好的性能提高,如IS程序,执行时间减少了25.3%,而对于小消息通信比较频繁的应用程序,性能会略有下降,如LU程序,执行时间增加了0.4%。     

基于噪声的能量有效PCS门限自配置策略

无线传感器网络节点预先绑定的物理载波侦听（PCS）门限无法适应不同噪声。为此,采用圆盘模型分析PCS门限对网络性能的影响,将能量有效的PCS门限配置问题,等效为冲突概率最小与吞吐损失最小的最优PCS门限规划问题,提出一种基于随机噪声的能量有效PCS门限自配置策略（EPCS）。仿真结果表明,在方差为0．01-0．20的高斯噪声条件下,EPCS门限的吞吐率和能量有效性分别下降17．9％和34．1％,均优于预配置PCS门限的性能。