Leak Current Fault Diagnosis Problem-Solving in Launch Vihicle Controlling System

In point of view of the system, the characteristic of leak current fault diagnosis in launch vehicle controlling system is analyzed. It is presented that the fault is a connecting way for sytem factors. By building some basic concepts such as componts, syptoms, observation and faults, the system model is turned into graph, where nodes represent components and edges represent fault transmission among components. Besides,designing rule, that is, bisection rule for diagnosing alglorithm is given based on the information theory. Operating feasibility and entropy function characteristic are analyzed using component trade-off value to substitute component entropy, giving fault problem-solving way based on the drawing model.     

Modeling by Bond Graph and Simulation for a Metal Pushing Belt Continuously Variable Transmission System

Continuously variable transmission is the ideal transmission mode, the Metal Pushing Continuously Variable Transmission (CVT) is the most mature CVT used in vehicle at present. By studying the transmission mechanism and ratio change characteristics of Metal Pushing Continuously Variable Transmission system, and using the bond graph theory, a bond graph model of continuously variable transmission is established in this paper, and the state space function is derived. Based on the model, The simulation of transmission characteristics of a CVT car is studied, the simulation result shows that the dynamic characteristics of continuously variable transmission could be expressed in this model. The research results can provide the theoretical analysis method and design basis for CVT vehicle.[WT5HZ]     

Study of Intelligent Fault Diagnostic System for a Kind of Power Plant

Based on the neural networks, object oriented technique, artificial intelligence technique and computer networks, an intelligent fault diagnosis system of the power plant whose need of the operation is presented. The architecture of software system , hardware system and corresponding databases is designed. The software of collecting data is established. The intelligent fault diagnosis system based on neural networks and object oriented technique is also developed. The physical system operation has been shown that the method mentioned above is feasible and effective in practice.     

Study on the Method of Intelligence Fault Diagnosis System for Drill

It is very difficult to simulate the motion process of drill by accurate mathematics model for the complexity and invisibility of stratum. The fault of drill is usually identified and disposed by personal experience so far. This means it can not estimate the trend of the equipment running good or not and the reason conduced the fault or location and degree of fault by data measured. Farther, it can not give the expert suggestions. Based on the studying of drill fault, artificial intelligence and expert system have been used in the petroleum drilling engineering, the theory and method of fault diagnosis intelligence system for drill have been studied. It also constitutes the expert knowledge database of graphic Fuzzy Neural Network for the familiar fault of drill. The intelligence reasoning machine which consists of expert rule, Fuzzy logic and artificial Neural Network have been bring forward. And the fault diagnosis system it makes for drill can be applied in complex system which includes multi-variable, multi-parameter and multi-process.     

Development and Application of Computer Aided Roll Design System for Thread-steel-bar

Roll pass design is one of the important content of making the rolling technology of section steel.The traditional pass design relies mainly on artificial experience,which brings some tedious calculation and great consumption of raw materials.In order to improve production efficiency,the constitute and the design methods of the roll system for thread-steel-bar are analyzed during stretching,further rolling and finished rolling.The mathematical models and the(experience) formulas used for the roll design in the past are revised.The computer aided roll design system is developed for thread-steelbar based on the structural means of compiling program.The authors adopt Visual Basic6.0 as a visual program tool,and combine the basic design theory of the thread-steel-bar's roll and the practical experience.The system can shorten the design cycle of the new product development,and reduce the energy consumption of the rolling mill and the distribution of production.     

笼养蛋鸡健康养殖技术研究的现状与发展趋势

蛋鸡笼养因其突出的优点必将仍是中国以及许多国家主要的养殖模式,笼养蛋鸡健康养殖是目前急需解决的问题.在对畜禽健康养殖发展的重要性和基本概念进行界定的基础上,从优良品种选育、饲养方式完善与替代、饲养环境优化、优质饲料生产与配制、动物疫病防控、健康养殖管理6个方面对国内外笼养蛋鸡健康养殖调控技术研究现状进行了综述,最后探索性地提出了中国笼养蛋鸡健康养殖技术研究的发展趋势.     

玉米杂交种选育专家系统的设计与实现

“玉米杂交种选育专家系统”是根据我国著名玉米遗传育种学家经验建立的，以Turbo-Prolog、C语言实现。可在长城、Super、AST、Compaq等微机上运行，能协助育种工作者进行自交系亲本选择、组合配置，事实库管理和杂交种综合评价。 本文介绍了系统的基本结构、主要功能、实现系统的主要技术和应用情况     

The Design and Implemention of an Automatic Generation System for Electric Power System Tidal Current and Impedance Charts

The poper proposes an efficient algorithm based on HOPFIELD neural networksto solve the crossing numbers problem of graph theory,and with the algorithm we successfully realized the automatic generation of electric power system tidal current and impedance charts.A technique using logic coordinate system to create,export very large scale graph is introduced in addition.     

中国县域主要粮食作物比较优势分析系统设计与实现

以县域《农村经济基础资料数据库》为核心,针对中国目前还没有研究开发出全国所有县域主要粮食作物比较优势分析系统的问题,探讨如何运用比较优势理论,以综合比较优势指数法作为比较优势计量指标,设计实现中国县域主要粮食作物比较优势分析系统。系统充分利用数据库技术特点,并采用Java语言开发实现,使其在确保系统和数据安全的同时,实现了网上以及在任意安装了Java虚拟机的计算机上运行,为日后系统的推广应用奠定了基础。     

Realization Methods of Reengineering Information System for Enterprises Based on COM/DCOM and Message Driven Mechanism

The application and research on CORBA(Common Object Request Broker Architecture),DCOM(Distributed Component Object Model) and agent technology in enterprise information system reengineering are current academic focus. Based on COM(Component Object Model)/DCOM technology, the paper provides how to setup the middle control module of message management & distribution mechanism and the realization methods for enterprise information system reengineering. Thus it can reach nice impact on information system reengineering of small-middle scale enterprises.     

基于SuperMap的松嫩平原科研成果管理系统的设计与实现

当前如何规范科研成果管理工作,是实验室全面提高成果管理水平所面临的重点问题之一。为了实现信息化和标准化的松嫩平原科研成果管理,在对实验室科研成果管理需求进行详细分析的基础上,进行了系统结构设计和实现。基于SuperMap Objects .NET 6R和SQL Server开发了松嫩平原科研成果管理系统。结果表明,该系统对成果文件或空间和属性信息进行管理和统计是非常高效的,对科研成果管理具有特别重要意义。     

Management System of the Tender and Bidding for Power Projects with a Valuation Based on the Bill of Quantities

Valuation based on the bill of quantifies will change the existing valuation mode of tender and bidding. For the standardized management of tender and bidding for power projects and the inteUigentized information management of power enterprises, it is an inevitable trend of reform to apply the valuation mode based on the bill of quantifies. According to the characteristics of power projects, this paper expounds the working process of the valuation mode based on the bill of quantities and analyzes the goal and function need of the tender and bidding management system. Considering the calculation procedure of the valuation and the quote strategy of quantities bill, the composition of fees for the valuation is settled and the calculation method is designed. To establish the management system of tender and bidding with a valuation based on the bill of quantities is beneficial for the costing reform of power projects and the perfection of the tender and bidding market. Therefore it is of great significance to spread the new management mode of project costing with a valuation based on the bill of quantities.