双相位编码在数据通信中的应用

双相位码是数据串行通信和记录中使用的一种编码方法。在集散控制系统中使用的磁带机和飞行数据记录器中得到广泛应用。本文主要介绍双相位码的编码、译码原理及双相位码的特点;重点论述双相位码的编码和译码过程在微机上的实现。工程实践和实验表明,用微机实现双相位码的编码和译码过程是切实可行的。试用在TDC-2000集散控制系统中获得了圆满成功。     

Optimal task allocation in hypercube multiprocessor ensembles

Criteria are established to determine the optimal policy for allocating a set of uniform tasks onto a multiprocessor hypercube ensemble. It is shown that the optimal policy depends on the ratio of computation to intertask communication required by the distributed program, and that based on this ratio, tasks should be placed either all on one processor or uniformly distributed over the largest possible hypercube.     

集群移动通信系统的组网设计

本文对集群移动通信系统在组网设计时应考虑的问题进行了分析，并提出了具体步骤和方法，可供集群系统组网设计时参考。     

中国爆破安全网

中国爆破安全网是由中国工程爆破协会主办的涉爆行业信息专业网 ,开通于 2 0 0 3年 4月。该网是民爆器材生产流通主管部门、使用部门和公安机关实施联网监控和规范化管理的有力工具 ,最主要的功能是为涉爆行业管理部门和从业单位提供一个功能完善的管理和办公平台。该网的开通 ,有利于民爆器材生产、销售、购买、使用流向监控制度的贯彻实行。文章介绍了网络的组成、建设原则 ,并给出了中国爆破安全网网络拓扑图     

Automated model generation for performance engineering of building automation networks

Large technical systems need to be designed both reliable and efficient. Specialized design tools offer therefore a simplified, abstract design and extend details autonomously in the background. Analytic and simulation based models could improve the quality by testing and dimensioning the design before implementation, but setting up the necessary models is time-consuming and expensive. Therefore many developers ask for analysis tools which are able to create their models from the available information in the design tools. This paper presents such an automated modeling approach basing on an existing design database at the example of a network analysis for building automation fieldbuses. The process of automated modeling is unfolded, and the potentials and limitations are discussed.     

Predictive modeling of mercury speciation in combustion flue gases using GMDH-based abductive networks

Modeling mercury speciation is an important requirement for estimating harmful emissions from coal-fired power plants and developing strategies to reduce them. First-principle models based on chemical, kinetic, and thermodynamic aspects exist, but these are complex and difficult to develop. The use of modern data-based machine learning techniques has been recently introduced, including neural networks. Here we propose an alternative approach using abductive networks based on the group method of data handling (GMDH) algorithm, with the advantages of simplified and more automated model synthesis, automatic selection of significant inputs, and more transparent input–output model relationships. Models were developed for predicting three types of mercury speciation (elemental, oxidized, and particulate) using a small dataset containing six inputs parameters on the composition of the coal used and boiler operating conditions. Prediction performance compares favourably with neural network models developed using the same dataset, with correlation coefficients as high as 0.97 for training data. Network committees (ensembles) are proposed as a means of improving prediction accuracy, and suggestions are made for future work to further improve performance.     

论高校组织管理中的有效沟通

沟通,是指信息在人与人之间的传递.它是一种通过传递观点、事实、思想、感受和价值观而与他人相接触的途径.任何组织不可能没有沟通而存在,沟通往往具有三大障碍:物理障碍、语义障碍和人为障碍.人为障碍的存在对有效沟通的实现阻力最大,要实现有效沟通可从以下几方面着手:一是缩短沟通链;二是进行有效的下行沟通;三是鼓励上行沟通.     

编辑出版自动化技术在医药专业期刊编辑部的初步应用探讨

本文首先概述了编辑出版自动化技术的概念及最新进展,然后就其在医药专业期刊编辑部的初步应用进行了探讨,论述了计算机、网络、数据库技术在稿件的选题、组稿、编辑、审校、排版、印刷、出版中的具体应用,强调了构建基于网络的编辑出版自动化系统对期刊现代化建设的重要作用。     

某实时控制系统在QNX上的具体实现

简述了QNX实时操作系统的特点，详细介绍了一实时控制系统在QNX4．25上的具体实现。     

关于成都膨胀土地区边坡稳定性的探讨

成都市三环路建设中 ,膨胀土边坡稳定性研究是大家关心的重要课题。膨胀土边坡土体中的吸力变化直接影响到其稳定性 ,参照“人工神经网络技术”中的吸力经验公式 ,以三环路东一B标段的路堤边坡为例 ,采用“条分法”进行预测分析 ,并有针对性地进行防护处理取得了较好的效果。