A Kind of Synthetical Fuzzy Control System of Carburization

Carburization is a complex manufacturing process with serious disturbance and time delay,which is multi-variable and uncertain.It is difficult to set up an exact mathematic model.Moreover,by means of conventional control methods and experience,satisfying control result can't be obtained.In this paper,according to the characteristic of controlled-object,Fuzzy control method has been chosen to design a Fuzzy-PI controller and a mixed-PID Fuzzy controller.The result of simulation shows that the robust performance and control result of the new Fuzzy controllers is better than the conventional PID controller.The overshoot is smaller.It is helpful to improve the quality of carburizing workpieces.     

Fuzzy c-means Cluster Over Gentic Algorithm

Fuzzy c-means (FCM) algorithm is dynamic cluster algorithm whose result often is local optimal decision. There often exists insignificant clustering in the result of Fuzzy c-means algorithm when traditional union, Intersection and inclusion work in fuzzy set. Our research indicates there are no insignificant clustering in the result of Fuzzy c-means algorithm over genetic algorithm and partial optimal solution can be avoided with this algorithm to a certain extent. The coding, select, corresponding crossover and mutation operators are designed. Finally we compared the performance of GFCM and FCM with testing data. Results show that the performance of GFCM is far better than FCM.     

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.     

Nonlinearity of Electronic Throttle and Its Control

This paper introduces the development of the electronic throttle control system (ETCS) , the structure and the principle of the system are also involved. After analyzing the nonlinearity problem existing in the mechanical structure of the system, a mathematical model of the ETCS is built up. Then three controllers (PID controller, Fuzzy controller, sliding mode controller) were designed and simulated in the matlab simulink. The result indicates that the PID controller has an overshoot,but the Fuzzy controller and the sliding mode controller can settle the nonlinearity problem better.     

The Application of Furry Decision for Generation Expansion Planning

Fuzzy decision was applied to the generation expansion planning and a method of fuzzy decision of generation expansion planning has been presented in this paper.     

Multiple Layer BP Neural Network for Fuzzy Calculating

The FCBP(Fuzzy calculating BP) algorithm which is proposed by this paper hasovercome the sensitivity for samples,reduced the number of input layer's samples,lightened the burden of input layer.it is suitable to fuzzy inference and pattern recognition.     

Study on Decision Method in Choosing MIS Softwares for Manufacturing Enterprises

The decision objects and evaluation target architecture in choosing Management Information Systems (MIS) softwares for manufacturing enterprises are proposed. Fuzzy mathematics comprehensive evaluation method is used in decision analysis. The method in is applied practically.     

A Comparison of Four Methods of Water Quality Assessment

In this paper, a back propagation network, a Hopfield network, Fuzzy comprehensive index method and classification of gray are compared in application for water quality assessment. The comparison result shows that the BP network is the best one of these four methods.     

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.     

数学方法在饲料配方设计中的应用

在饲料配方中,数学方法占有非常重要的地位。综述了饲料配方设计中应用的几种数学方法:试差法、线形规划、目标规划、模糊规划、灰线形规划和随机规划等方法,从而为建立科学、合理的饲料配方优化系统奠定良好的基础。     

The Application of Fuzzy Multicriteria Decisions Theoryin Evaluation of Construction Cost of Civil Engineering

A new method Based on Fuzzy Mathematics for evaluating Construction cost ispresented here. By dividing the civil engineering into a series of engineering characters and quantify-ing them. The weighted Hamming Distance between builded engineerings and engineering to bebuilded has been ealculated with the help of Multicriteria Decisions Theory,and Based on that ,theconstruction cost of later engineering has been evaltlated.     

The Software Implementation of Neural Network Fuzzy Inference Cooperation System

This poper sets up a new Neural Network Fuzzy inference Cooperation system which is based on fuzzy inference principle in Expert Systems,take advantage of the powerful learning function, the little sensitivity to input layer's samples,and the fast convergence and so on in FCBP and take advantage of the good sort property and good suit property to fuzzy value in MFART Network.     

Study on the Price-estimation of the Land-rental with Case-based Reasoning System

In this paper the theory of Fuzzy Mathematics is used to set up the case-based reasoning(CBR) mathematic model system on the price-estimation of the land-rental and the related process and conditions of its application are suggested.The calculation example of CBR in land business demonstrates that the CBR model is effective;it can be used as the reference for the decision-making on estimating the price in land business.     

Weighting Coefficient Optimization Unification of Lexicographic Method in Fuzzy Multi -objective Optimization Design

The Lexicographic method has subjective and empirical character,so a weighting coefficient is introduced by considering the importance and proportion of each individual object,the preferable result of every individual object can be confirmed by comparing the degree of similarity between the perfect one and the ecumenic one and the Fuzzy optimization will be perfect.The effectiveness of these methods is illustrated by a fuzzy optimal design of the three-bar truss.     

舟曲县耕地地力评价研究

在GIS的支持下采用图形叠置划分法划分土地评价单元,运用特尔斐法、层次分析法、模糊数学法结合ArcGIS软件快速准确地完成耕地地力评价,且分析其评价结果及空间分布,以期进一步了解舟曲的耕地地力现状。结果表明：舟曲县耕地总面积为15081.28 hm²,其耕地地力可划分为四等,一至四等地分别占耕地总面积的10.12%、31.52%、34.08%、24.28%。将评级结果属较低等级（二至四等）的耕地划定为中低产田,且中低产田占耕地总面积的89.88%,说明该地区的耕地质量的总体水平比较低。针对不同等级地力水平进行分析,找出其主要的限制因素,从而确定其土壤改良利用的方法和措施。     

Study on Network Learning System Based on Fuzzy Mathsmatic

Evaluation of network study result is key job that network teaching and network teaching system developments. Fuzzy comprehensive evaluation method is introduced to analyze the network study based on the network study evaluation system index system combining with the characteristics of the combinative network study. The paper puts forward the model of the fuzzy comprehensive evaluation of network study, it proves the fuzzy comprehensive evaluation method is a kind of valid method than other traditional method in network learning through an experiment.     

Improvement of Fuzzy Comprehensive Evaluation Method

Fuzzy comprehensive evaluation is an effective method to evaluate many comprehensive problems and is widely used in environmental engineering, mining engineering and so on. The popular fuzzy comprehensive evaluation method is analyzed and some irrationality is found in its max-min algorithm and maximal subordinate degree principle. An altered arithmetic is proposed, and a technique of synthetic grade is introduced as the final evaluating result. The application case proves that the evaluating result with new method is more reliable.     

Evaluation of Regional Tourism Competition Basc on SEM

There are a lot of evaluation approach on Regional Tourism Competition,such as Analytic Hierarchy Process(AHP),Data Envelopment Analysis(DEA),Principal Component Analysis(PCA),Fuzzy Cluster Analysis(FCA) and so on,but so far there is less research on valuation approach on Regional Tourism Competition via SEM.This paper has constructed an evaluation model about Regional Tourism Competition via the result of 5 Factors model on Regional Tourism Competition via SEM.     

广西龙眼品种（单株）加工果汁性状的模糊综合评判

利用模糊综合评判方法对广西17个龙眼品种(单株)加工果汁进行整体评价。结果表明，根据果实品质或果汁的个别性状无法对果汁综合水平进行全面的评价，某一性状表现良好的其它性状不一定表现也好；车站、迟白露与大乌圆（容县）加工果汁的综合性状较好，有进一步开展研究及应用的潜力。     

高校科研项目立项综合评价研究

将模糊数学方法用于高校科研项目综合评价，建立综合评价的数学模型，克服了非重要因素及主观因素所占权重较大的缺陷，增强了项目评审的客观性，从而有利于科研经费的合理分配使用；采用计算机进行操作，提高了工作效率，节约了评审经费，在科研管理领域具有更为广阔的应用前景。