Diagnosis approach based on failure mode importance of causality diagram

Causality diagram methodology is a probabilistic reasoning, which can be applied to fault analysis. However, it lacks analysis on the importance of failure mode. The importance of failure mode is introduced to develop causality diagram methodology, which is successfully applied in fault analysis of gas explosion in colliery. The study shows that causality diagram based on importance of failure mode is an effective qualitative and quantitative method to analyse faulty, evaluate system safety and provide feasible countermeasures to prevent accidents.     

Design and Realize Intelligent Decision Support System of Rocket Safety Control

The problem on rocket safety control is important during the rocket launching proceeding, and is also the focus of every space country. The importance of rocket safety control is introduced, and the characteristics of the existing system are analyzed. Because of the special characteristics, the paper proposes an intelligent decision support system of rocket safety control, adopting the technique of artificial intelligent especially expert system. First, the authors introduce rocket safety control architecture and function. Then, a new method is proposed to represent the knowledge which is integrated with production rule and object-oriented technique. Furthermore, the reasoning is investigated, and decision-making network and uncertainty reasoning model are introduced.     

Reasoning Method Based on Motorcycle Design

According to the needs of setting up a professional system based on motorcycle design,the CBR(case based reasoning) and RBR(rule based reasoning) methods are introduced.After discussing the difference between the two kinds of reasoning,a method of integrating them into the motorcycle design flow is put forward to realize the design reusable technology and improve the design efficiency,by using the CBR in the step of selecting the similar motorcycle and the RBR in project's modification according to correlative rules.     

Knowledge-based ECG Automatic Diagnosis System

This paper presents the structure of a knowledge-based ECG automaticdiagnosis system and the key technologies applied in the system. Using database technology to store, the ECG knowledge-database is constituted of ECG knowledgeand a set of rules .The inference engine of the system simulates the real diagnosis of the experts and combines the forward reasoning with inexact reasoning. At the same time, complicated reasoning is avoided. Because the inference engine is independent of what is stored in the ECG knowledge-database, the system is suitable for expert system.     

Knowledge-based Intelligent Decision-making System for the Safety of Rockets

With the progress of science and technology, the astronautics has obtained great development and researched in many countries, the problem on rocket safety control is important during the rocket launching proceeding, and is also the focus of every space country. At first, the importance of rocket safety control is introduced and the characteristics of the existing system for the safety of rockets are analyzed. After indicating its disadvantages, the design idea, system framework and method for realization of the knowledge-based intelligent decision-making system are proposed to improve certainty and authenticity of safety decision, containing correspond knowledge and adopting the technology of intelligent decision and reasoning on AI.     

Approximate reasoning algorithm based on the causality diagram

The Causality Diagram, which adopts graphical expression of knowledge and direct causal intensity of causality, overcomes some shortages in Belief Network and has evolved into a mixed causality diagram methodology coped with discrete and continuous variable. But the Causality Diagram's reasoning calculation is a NP problem. It is inconvenient its popularize and application. This paper presents an approximate reasoning algorithm, and it cuts down the Causality Diagram's steps and harsh condition, it makes the complexity of the algorithm the same order of the joint events. A reasoing example justifies our algorithm.     

Constant Temperature Control System for Gas Water Heater Based on Fuzzy Reasoning Arithmetic

Basing on Fuzzy reasoning technology, this paper introduces the work flow of Gas water heater, and the trait of papilionaceous valve. It also describes the designing process of Fuzzy controller, its theory and the method of making parameter. The experiment results show that this temperature control system has better characteristics such as high- precision, good dynamic performance, excellent control effect, and so on. The design shows its validity and practicability.     

农业科技评价及其问题与建议

农业科技评价是指根据委托者的明确目的,由专门的评价机构和人员依据大量的客观事实和数据,遵循一定的原则、程序和标准,运用科学、可行的方法,对科技政策、科技计划、科技发展领域、科技项目、科技成果、科技机构、科技人员以及与科技活动有关的行为,进行专业化咨询与评判的活动。其目的在于减少农业科技决策的盲目性和随意性,有重点、有效率地分配农业科技资源,改善和提高农业科技决策的质量和水平,通过公开、透明的评价标准、程序及评价结果,接受各方监督,创造民主、公平、竞争的农业科研环境。农业科技评价具有9项功能,需要遵循8项标准。当前农业科技评价存在的主要问题是：评价大多只注重一头一尾,而缺乏对科技活动本身的过程性评价和整体性评价;第三方评价制度亟待建立;定位不够明确;评价能力有待提高;评价指标体系存在误区。为此,建议采取以下对策：落实科技评价相关规定,建立健全农业科技评价管理制度和操作规范;建立健全农业科技评价支持系统,培育农业科技评价人力资源;加强对符合农业科研现状的评价指标体系和方法的研究;评价工作要抓全程;建立健全农业科技评价激励制度,充分发挥评价的激励作用;建立与国际接轨的农业科技评价制度。     

基于网络的鸡病防治与诊断专家系统的设计

目前中国鸡病防治中存在一些暂时无法解决的难题,如基层中鸡病诊断专家缺乏、鸡病防控不及时等。基于现状,利用计算机网络技术和人工智能技术,将SQL数据库和ASP.NET技术相结合,设计并开发了基于网络的鸡病防治与诊断专家系统。该系统将鸡病诊断和鸡病防治知识进行集成,采用基于规则的模糊化的混合推理策略,实现了鸡病诊断和防治的数字化和智能化,用户可通过网络实现鸡病诊断、鸡病防治、鸡群管理、知识查询和统计分析等功能。经验证性试验和专家评测,该系统结构合理,功能完善,可以满足广大基层用户的需求,具有一定的推广应用前景。     

Method for Calculating the Activities of Compounds from Binary Phase Diagram Involved Stable Compounds

In binary phase diagram there are many stable compounds. Hereby a new method for calculating activities of compounds from binary phase diagram involved stable compounds is presented. Based on the available formula for calculating activities in binary phase diagram, the activities of the two pure components are gained. And the balance constant K~0 can be obtained from mass action law. Thereby, the activities of stable compounds are obtained from the activities of the two pure components. By using this method, the activities of stable compounds in In-Sb system are obtained. It proves that this method is feasible.     

基于Voronoi图、GIS的三峡库区农村居民点空间机理研究

利用GIS分析技术、Voronoi图Cv值综合分析,探讨重庆市忠县农村居民点的空间机理,找出其分布的趋势性和规律性,为县、镇级土地规划和土地整治提供直观指导。根据聚落地理学的研究方法,建立Voronoi图、高程、坡度、坡向、道路、水系因子,通过空间分析法和定性定量分析法相结合的方法进行研究。结果表明忠县整体Cv值为85.52%,为集群分布,农村居民点在高程上主要分布在400~700 m;在7°—15°内分布最多,达到32.50%;在坡向影响下西北坡分布最多,达到14.95%;在道路因子下,农村居民点在50~100 m缓冲区内密度最高,达到64.38个/km2;农村居民点主要靠近在距离水源100~200 m。     

Uncertain reasoning model for the rocket safety decision system

In view of the complexity of the measuring environment and uncertainty of the a prior knowledge for rocket aviation,a rocket safety control system based on uncertainty reasoning is proposed.The uncertain representation and processing of the knowledge in expert systems are established according to the characteristics of the parameters .Following the characteristics of the decision rules and decision procudure,the reasoning control strategy is studied and the method for conflict resolving strategy and searching strategy is proposed.Then,the uncertain matching rules and the feasibility degree delivering method are expressed,and the decision-making network and the rule-based uncertainty reseaoning model were constructed.Simulation experiments show that this system can acquire the craft launching information quickly and accurately,which greatly improves the reliability and authenticity of safety control decision for rocket aviation,and can control the rocket aviating state effectively.     

The Calculation of Section of Al2O3-CaO-SiO2 System and Its Verification

The basic phase is selected according to the measured phase diagram, two isothermal sections and two vertical sections of the Al 2O 3-CaO-SiO 2 ternary system are calculated using FACT software. The sections in the same conditions are described through the measured phase diagram. Because of the complexity of this ternary system, there is a large difference between the measured and the calculated phase diagram. It is necessary for FACT to ameliorate the calculation model and perfect the database in calculating oxide system which the interaction is strong. For this kind system, the isothermal section and vertical section should be founded through the experiment result and referencing the calculated phase diagram at the same time.     

Research in Automation Process Planning About Sheet Metal

Along with the development and appliance of the artificial intelligence, professional have adopted many kinds of methods such as expert system, NN and so on to explore an innovation type CAPP. The paper gives a brief introduction to the principle and design methods of process planning based on the theory of expert system developing a computer aided process planning system of sheet metal and discusses in detail the system uses the network graph to describe the parts and technology decision-making route, and the methods of separated reasoning and various expressions of knowledge are used to solve the complexity of development in CAPP research. Finally satisfied the requirement of the practicability?opening and intelligence about the system.     

养分平衡法配方施肥数据库建模

【研究目的】养分平衡法是一种重要的配方施肥方法,在进行施肥决策时,需要依赖大量的施肥参数进行计算,所以建立数据库对施肥参数进行有效地管理是一项非常重要的工作。【结果】笔者给出了养分平衡法简洁的计算公式,采用实体-关系建模的方法确定了8个实体对象和12个关系对象,并绘制了完整的实体-关系图。【结论】本文的分析对于其他配方施肥方法的参数管理同样具有参考意义。     

A Uncertain Reasoning Machine

This paper firstly discusses some problem about the uncertain reasoning machine in the agricultural expert system based on HPC, such as the knowledge representation, the certainty factor, the representation of evidence uncertainty, the calculation of multi evidence uncertainty, the update of uncertainty and so on. Secondly, the control strategy of this uncertain reasoning machine is discussed. This control strategy adopts a converse reasoning strategy based on target, and it adopts a conflict removing strategy based on certainty factor. The arithmetic to realize the uncertain reasoning machine is also given in detail. At last, this paper stats the example of malnutrition diagnosing of grape as the application of the reasoning machine.     

A General Program for Transforming an Arbitrary Polynominal Matrix into Smith's Canonical Form and Its Application

To analyze and design multivariable control system by modern frequency domain method, there should be a transformation of an arbitrary polynominal matrix into Smith's canonical form. This paper discusses the treating method and technique in programming and gives a N-S flow diagram of program to transform an arbitrary polynominal matrix into Smith's canonical form. Two transformed and applied examples show, that the program is correct, simple, useful and has good suitability. It is applicable to frequency-domain analysis and design of multivariable system.     

Construction and Application of GPS Location-based Services System Based on JAVA

A method of constructing GPS-based positioning services system by means of JAVA technology is introduced in this paper. The position data, which are sent from GPS satellites, are received by GPS receiving terminal and are analyzed by mobile computing client developed on J2ME in accordance with the differential GPS algorithm. The client submits special position querying information to position server in way of wireless GPRS network. After computing and data querying, the server developed by J2EE returns results to the mobile device. Then, the mobile computing client displays the position map or carries out further processing. All of these form a highly precise location-based services system.     

福州市农作物低温灾害监测预警服务系统设计与应用

低温灾害是福州市农作物的主要气象灾害之一,其监测预警具有重要意义。运用远程监控系统,并结合福州市部分农作物低温灾害气象指标,建立福州市农作物低温灾害监测预警系统,并在2012年1月下旬实际应用中进行测试和应用,灾后调查显示,系统运行生成的监测预警结果基本与实际相吻合。结果表明,该系统自动生成的监测、预警分布图及预警信息,对最终形成的决策服务产品具有很大的指导作用,在灾害监测预警中具有较好的应用前景。