PC及其兼容工控机中断方式下的串行通讯

本文介绍如何通过直接对INS8250的内部寄存器操作以实现PC及其兼容工控机中断方式下的串行通讯以及中断方式下串行通讯的程序设计要点。     

PC机间高速全双工串行通讯TURBO C的实现

简述有关IBM PC机异步串行通讯的软、硬件编程特性,以PC机间的串行通讯为例,阐述了中断方式下高速全双工串行通讯TURBO G 2.0的实现方法。     

面向对象的串行通讯编程

介绍了用Ｃ＾＋＋编制的串行通讯类，实现了中断方式下的ＲＳ２３２串行通讯，并给出了程序实例。     

串行通讯的“中断＋查询”方式及其应用

本文以接收数据为例,对计算机串行通讯的特点进行了分析,提出了一种特殊工作方式—“中断+查询”方式,它兼顾了中断方式“高效”和查询方式“高速”的优点,使串行通讯可以满足某些特殊需要。实现了“高精度恒温控制系统”与286微机的串行通讯。     

PC机间高速全双工串行通讯TURBO C的实现

简述有关ＩＢＭＰＣ机异步串行通讯的软，硬件编程特性，以ＰＣ机间的串行通讯为例，阐述了中断方式下高速全双工中行通讯ＴＵＲＢＯＣ２．０的实现方法。     

TMS320F240 DSP的串行通讯及编程

介绍了TMS320F240 DSP的串行通讯，重点分析了数据帧格式，多处理器通讯以及SCI中断，并给出了基于中断的SCI串行通讯程序，为掌握和应用该数字处理器的串行通讯提供指导。     

Windows下串行通讯中断程序的设计

串行通讯在实际应用中常常需要中断处理，本文介绍了在目前流行的Ｗｉｎｄｏｗｓ环境下串行通讯后台处理的方法，并给出了实例。     

VC下利用串口进行数据通讯的研究

分布式监控系统中串行通讯是常用的数据交换方式。研究了VC 中的串口通讯方法，包括通讯协议、校验方式及编程中要注意的关键问题，如内存的溢出处理、多线程的编程及双向中断方式的数据通讯，这些问题在工程项目研究中都较为有用。给出了VC下的相应解决办法。     

用Turbo C实现PC机间的串行通讯

本文以IBM PC 间的串行通讯为例,介绍了用Turbo C 2.0实现具有RS232C 标准接口的计算机系统之间串行通讯的三种方式:查询、中断和驻留方式。这是我们在实际工作中总结出来的,不论是对工业控制系统还是对科研开发都有很高的参考价值。     

排爆机器人无线串行通信的C语言编程

计算机上的RS-232串行通信标准接口可以方便地与外设进行通信以及对外设的监测数据进行实时的采集。用C语言编写上、下位机的串行通信程序时,主要有查询方式和中断方式两种不同的方法。其中中断方式避免长时间访问串行口的问题,数据交换可在上位机后台进行,在设计前台事务处理程序时就可以不考虑数据交换问题,提高了CPU的工作效率。因此,本文着重介绍中断方式下的通讯编程,并使用数传电台实现排爆机器人上、下位机的无线通信。     

Expert system verification and validation: a survey and tutorial

Assuring the quality of an expert system is critical. A poor quality system may make costly errors resulting in considerable damage to the user or owner of the system, such as financial loss or human suffering. Hence verification and validation, methods and techniques aimed at ensuring quality, are fundamentally important. This paper surveys the issues, methods and techniques for verifying and validating expert systems. Approaches to defining the quality of a system are discussed, drawing upon work in both computing and the model building disciplines, which leads to definitions of verification and validation and the associated concepts of credibility, assessment and evaluation. An approach to verification based upon the detection of anomalies is presented, and related to the concepts of consistency, completeness, correctness and redundancy. Automated tools for expert system verification are reviewed. Considerable attention is then given to the issues in structuring the validation process, particularly the establishment of the criteria by which the system is judged, the need to maintain objectivity, and the concept of reliability. This is followed by a review of validation methods for validating both the components of a system and the system as a whole, and includes examples of some useful statistical methods. Management of the verification and validation process is then considered, and it is seen that the location of methods for verification and validation in the development life-cycle is of prime importance.     

Cyberspace as a generator of changes in the aggressive-victim role

The interaction of adolescents’ presential and cyberspace contexts accentuates the emergence of the aggressive-victim role. This profile takes on new dimensions as a result of the many combinations involved in the co-existence of bullying and cyberbullying. The twofold object of the present work was to: (i) determine the prevalence of victim-aggressive in the various forms that this role might be found in the context of bullying and cyberbullying; and (ii) explore the synergistic relationship established between the type and frequency of the abuse suffered and the type and frequency of the aggression perpetrated. The sample consisted of 1648 adolescents of from 12 to 16 years in age. The instrument used to acquire the data was a questionnaire. The results revealed the existence of four categories of aggressive victims: traditional aggressive-victims, aggressivecybervictims, cyberaggresive-victims, and cyberaggresive-cybervictims. The types of bullying suffered and perpetrated were found to be directly related and the frequencies of these two classes of attack were positively correlated. This allows one to predict the cyberspace and presential behaviour that will be displayed by adolescents who are being subjected to certain types of bullying and cyberbullying.     

基于Authorware与Office兼容性课件制作技术研究

对Office及Authorware做了深入的研究和分析,Office有其应用简单、覆盖面广的特点,而课件制作工具Authorware有其交互性强和对多媒体元素较好控制的特性,将两者结合起来,能够制作出操作便捷、使用广范的课件。     

区块链+物联网在农产品溯源中的应用研究

近年来,农产品安全问题日益严峻,传统的农产品追溯体系面临公信力缺失、监管困境和扩展性问题,农产品质量安全追溯迫在眉睫。随着区块链技术不断发展,其具有的分布式、去中心化、不可篡改、可追溯等特性在改善农产品溯源系统数据安全性、透明性等方面发挥着重要作用,并受到了各个行业的广泛关注。在简述可追溯性和追溯系统概念的基础上,介绍物联网和区块链技术,并探讨了当前国内外学者将区块链和物联网框架融合应用到农产品溯源中的一些相关研究,同时阐述了溯源系统在物联网与区块链结合下带来的安全、可靠、透明等好处及面临可扩展性、效率问题、资源浪费等挑战,最后对当前农产品溯源体系建设提出建议以及未来的研究方向。     

缺陷理解研究:现状、问题与发展

缺陷理解是针对缺陷本身及衍生产物建立完整认知过程的研究.由于调试的连贯性及完美缺陷理解假设不合理性,深入分析缺陷传播过程及缺陷间关系、研究关键信息检测及理解信息表达方式,提取及表达面向缺陷研究不同场景不同需求下的可理解性信息,最终达到优化缺陷分析结果及辅助调试各过程缺陷知识复用及积累的目的成为必然.由定位与修复之间存在的知识割裂问题出发,思考缺陷理解研究的本质,明确缺陷处理过程中缺乏知识挖掘及互用问题.通过工程实例分析及文献成果梳理,提炼总结缺陷理解领域的研究方向及技术方法,探讨缺陷理解研究中的特点及难点,思考缺陷理解研究中存在的问题及未来的研究方向,对缺陷理解的研究趋势进行了展望.     

输电线路材料简易循环索道运输应用

为解决高山大岭输电线路工程装置性材料及施工器具运输,通过采用简易循环索道运输方法,解决高山大岭输电线路工程装置性材料及施工器具运输的难题。从简易循环索道的适用范围、架设、运输效率及与传统人（畜）力运输成本比对等方面得出结果在高山大岭地形条件下,输电线路材料简易循环索道运输的应用将是制约本工程施工的必然性和必然结果。简易循环索道运输方式技术合理、方案环保、安全可靠, 彻底解决了高山大岭输电线路部分塔基小运道需采用铺设栈道,工程量大,成本过高等方面引发的装置性材料运输难题,尤其对塔材超重、超大件的运输难题的解决提供了保证,不仅提高了施工运输工效,同时取得了很好的经济、社会效益, 在输电线路恶劣地形的施工中具有很高的推广价值。     

Real-world effectiveness of Ergonomic methods

The way ahead with the practical development and application of Ergonomic methods is through a better anticipation and appreciation of changes to system effectiveness and human work that will be incurred through the introduction of new technologies to the workplace. These improvements will involve an improved awareness by the system of the working context and environment. The argued future is with improvements in the handling and use of knowledge by systems. The development of suitable Ergonomics methods, or the careful adaptation of existing methods, should accompany any technological revolution. Moreover, future methods are needed that are specifically developed to be applicable to the real time study of work considering both work context and the amalgamation of results from the use of many diverse methods throughout the design and development life cycle of a system. Part of this process will be a necessary complementation of both quantitative and qualitative methods and guidelines. Another focus should be on creating improved Ergonomics participation within multidisciplinary system design and development environments throughout the system's life cycle. Only through this avenue can Ergonomics show a consistent and valued contribution to quality design and its development. In parallel to such a contribution will be an acceptance by other engineering disciplines, managers, and customers that such an application of Ergonomics is cost effective.     

基于运动轨迹分析的头部行为识别

提出一种基于人脸运动轨迹分析的头部行为识别方法。对人脸进行检测和全自动跟踪,通过计算人脸运动轨迹参数并进行参数数据统计和分析,实现人体头部行为识别。针对抬头、低头时出现的跟踪框长短轴交换问题,通过引入基于跟踪框长短轴比值的约束条件,对椭圆跟踪盒主轴与纵轴夹角的计算方法进行改进。实验结果证明,该方法的正确识别率较高。     

人工系统中数据–因素–算力–算法作用及相互关系研究

目前的研究认为人工智能的核心是数据、算法和算力,但因素在形成人工智能系统过程中是必不可少的。论文针对人工系统中的数据、算力、算法和因素的各自作用,及其相互关系进行了探讨和论证。从人工系统的内涵出发,描述人工系统的发展过程,认为目前和今后的人工系统必将具有人工智能特征,而实现人工系统要充分考虑上述四方面的相互作用。研究结果表明:数据是人工系统辨识因素的基础,也是形成算法的基础;因素是人工系统控制自然系统的方法及算法所需变量;算法体现了因素与数据关系,可描述人工系统结构;算力是解算算法的能力,也需考虑数据和因素的特征。因此因素在人工系统建立过程中与数据、算法和算力具有相同的重要性。它们具有明显的作用关系,且普遍存在于各个学科,是形成各学科理论基础体系的关键。