数据加密中的多功能接口技术(MFIT)

本文研究的MFIT,符合国际标准化组织(ISO)的OSI标准。可用于数据与数字通信。计算机网络的数据保密中。MFIT与TDM/FDM结合起来,将使我国信息处理事业的计算机网络、数据库和汉字三大公用支撑技术更加完美,亦可缩小我国信息处理技术与世界水平的差距。     

多任务密码服务系统设计与实现

在当前的安全体系架构中,大多数密码服务均由密码服务中间件保障,其共同特点是功能性强但安全性不高。针对上述问题指出了一种解决思路,将密码运行与密钥管理下移至安全的硬件设备内。ISO／IEC7816标准是当前智能卡的国际标准,其中7816-8描述与安全相关的行业间命令。文章在结构上改进一个以ISO／IEC7816-8为设计蓝本的密码服务系统,加入一个中间层,称之为运行环境,设计了运行环境的结构;设计完善了管理安全环境命令;制定了密码服务多任务运行调度策略,实现了任务间的动态切换,得到了一个多任务密码服务系统。     

The SQUID approach to defining a quality model

This paper describes an attempt to use the approach developed by the SQUIDproject, which was part of the ESPRIT 3 programme, to define the software quality requirements of the Telescience project. The SQUID project developed its approach to quality modelling in parallel with ongoing feedback from testing that approach on the Telescience project, which was both large and software intensive. As part of this exercise we used the ISO software quality standard ISO 9126. It was an assessment of this and other existing quality models that caused us to re-assess what was meant by a quality model and led to a decomposition of existing quality models into a composite model reflecting the different aspects of the model and its mapping onto a specific project or product. We break existing quality models into components which reflect the structure and content of the model. This composite model must then be customized for an individual product/project, we call this customized model a Product Quality Model. Application of this approach to the Telescience project identified a number of practical problems that the SQUID project needed to address. It also indicated a number of problems inherent in the current version of ISO 9126.     

On procedures

Abstract: An intriguing recent development is the vogue for formal documentation of the processes and procedures allegedly followed by an organization. The Author examines the possible drawbacks of such an approach, and discusses possible explanations for its present ubiquity.     

基于ISO编码的串行通讯方法

许多现行数控系统的串行通讯方式采用ISO编码格式，且其自带的通讯软件多工作于DOS操作系统，操作菜单和操作方法各不相同；而且在Windows95及Windows NT操作系统，特别是在Windows2000操作系统中多数现有的通讯软件工作不稳定或根本不能工作，本文针对这一问题，介绍了利用上述几种操作系统自带的HYPERTRM．EXE程序实现PC机与数控系统进行ISO编码数据通讯的方法，该方法简单可行、易行操作，适用于工程人员进行现场调试和检修。     

一种RFID标签芯片数字部分状态机的设计

介绍了符合ISO/IEC15693标准的RFID标签芯片数字部分的基本架构。设计了一种符合ISO/IEC15693标准的RFID标签芯片数字部分状态机。采用Verilog语言编写了程序,用Modelsim5.7进行了功能仿真,并用XilinxFPGAXC3S200进行了下载验证。该电路可应用于符合ISO/IEC15693标准的RFID标签芯片的数字部分,对其它标准的RFID标签芯片数字部分的设计也有一定的借鉴作用。     

APP软件性能效率研究

性能效率是APP软件的重要质量属性，但目前缺乏APP软件性能效率的通用模型。分析了APP软件的性能特征，基于ISO/IEC 25010标准提出了APP软件的性能效率模型，定义了APP软件性能效率的子特性和度量指标。基于提出的APP软件性能效率模型，通过实验对APP软件的性能效率进行了度量及相关分析。     

气动ABS故障诊断系统设计

针对气压制动ABS,设计了一种双CPU结构的故障诊断系统。按照故障部位对ABS可能出现的故障进行了分类,确定诊断方法,完成相应的硬件电路设计和软件开发。采用ISO9141故障诊断通讯协议,在自主开发的ABS系统中设计了用于故障码传输的通讯电路与接口。实车试验表明,所开发的ABS故障诊断系统是合理可行的。     

Measurement and evaluation of whole‐body vibration exposure in drivers of cargo vehicle compositions

The present study carries out measurements and evaluations of whole‐body vibration (WBV) exposure in drivers of a cargo vehicle composition, traveling under different conditions of roads and loading, to compare and assess the health risk through the various criteria provided by vibration exposure standards. Using the acceleration data measured in the seat, the WBV exposure of the drivers is evaluated according to the criteria provided by five standards: three different versions of ISO 2631 (Part 1, 1985 and 1997; Part 5, 2004), the European Directive 2002/44/EC and the new Brazilian regulation NR‐15 published in 2014. Comparisons investigating the differences between the standards are presented. The results of the experimental data indicate that the current version of the NR‐15 is more restrictive than the other standards considered in this paper. Thus, these results can contribute to improve the criteria used in the new NR‐15.     

射频基站芯片FM1722应用设计

射频基站芯片FM1722,是复旦微电子设计的一款射频读卡芯片.该芯片支持ISO14443 type A和type B等协议.射频基站芯片作为读卡设备的主要芯片,大大简化了读卡设备的开发.本文首先阐述了射频基站芯片的基本原理,以Freescale 8位微处理器MC68HC908JB8为例给出了控制FM1722的使用方法,重点给出了硬件电路设计、软件编程方法.可供新型读卡设备开发借鉴.