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糊模数学方法与专家系统推理模型
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作者 袁再江 《计算机科学》 CSCD 北大核心 1989年第6期78-80,共3页
建立专家系统的目的是用计算机来模拟专家如何利用知识解决具体问题,这必然要涉及到用形式化的手段解决专家知识的描述,处理和运用的问题。进一步说,就是要解决专家知识描述的表达模式和专家知识运用的推理模型。
关键词 糊模数学 专家系统 推理
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基于毁伤的机场作战效能评估 被引量:4
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作者 范阳涛 杨萍 +2 位作者 世文学 张信启 孙永福 《四川兵工学报》 CAS 2009年第10期93-95,共3页
在分析机场子目标易损性的基础上,确定了各子目标的毁伤指标.根据各子目标的毁伤程度对其作战效能的影响,运用糊模数学理论,计算了各子目标的保障能力指数.最后根据目标系统中各子目标功能逻辑上的关系,从系统的观点出发,建立了机场在... 在分析机场子目标易损性的基础上,确定了各子目标的毁伤指标.根据各子目标的毁伤程度对其作战效能的影响,运用糊模数学理论,计算了各子目标的保障能力指数.最后根据目标系统中各子目标功能逻辑上的关系,从系统的观点出发,建立了机场在毁伤条件下的作战效能量化评估模型.实际应用表明,该模型能够全面、客观地反映机场的作战效能. 展开更多
关键词 机场 毁伤 糊模数学 作战效能 评估
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Ecological Suitability Evaluation on Agricultural Land in Western Jilin Province Based on Fuzzy Mathematics 被引量:2
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作者 臧立娟 王凤艳 任建超 《Agricultural Science & Technology》 CAS 2012年第8期1757-1761,共5页
[Objective] This study was to evaluate the ecological suitability of agricultural land in western Jilin Province, with the aim to provide basis for the effective application of agricultural resources and the structura... [Objective] This study was to evaluate the ecological suitability of agricultural land in western Jilin Province, with the aim to provide basis for the effective application of agricultural resources and the structural adjustment of land use. [Method] The evaluation index system was constructed based on fuzzy mathematic method according to the principles of systematic, dominant, effectiveness and feasibility; based on law of tolerance, reasonable evaluation criteria were determined according to the ecological amplitude of crops; based on GIS processing, the initial data completed the mathematical operation by using the VBA program in Excel. [Result] The area of agricultural land grade I was 5 512 km2, grade II of 25 985 km2, grade Ill of 7 907 km2, and area of land not suitable for agriculture was 6 312 km2. According to the evaluation results, the key areas for land use adjustment were Zhenlai County, Da'an County, Tongyu County and western Changling County. The directions of land use adjustment included improving irrigation and drainage conditions, governing land salinization and conversion of cropland to forest and grassland. [Conclusion] This study provided basis for the effective application of agricultural resources and ecological environment construction in western Jilin Province. 展开更多
关键词 Land use Suitability evaluation Agricultural land Fuzzy mathematic method Western Jilin Province
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Homomorphism and Isomorphism of Regular Power Ring 被引量:3
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作者 姚炳学 《Chinese Quarterly Journal of Mathematics》 CSCD 2000年第2期23-28,共6页
The upgrade of all kinds of algebraic structures has been emphasized with the development of fuzzy mathematics.The concept of hypergroup was raised first by Prof.LI Hong_xing in [1]and HX ring was done in [2].In thi... The upgrade of all kinds of algebraic structures has been emphasized with the development of fuzzy mathematics.The concept of hypergroup was raised first by Prof.LI Hong_xing in [1]and HX ring was done in [2].In this paper ,some properties of power ring and quasi_quotient ring are further studied based on paper [3~6].Especially,several theorems of homomorphism and isomorphism of regular power ring are established. 展开更多
关键词 subsemiring semiideal HX ring power ring regular power ring quasi_quotient ring
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APPLICATION OF FUZZY INFERENCE IN IDENTIFICATION OF HELICOPTER MODEL
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作者 宋彦国 张呈林 徐锦法 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2001年第2期124-129,共6页
Helicopter mathematical model mainly depends on design helicopter control system, flight simulator, and real time control simulation system. But it is difficult to establish a helicopter flight dynamics mathematical ... Helicopter mathematical model mainly depends on design helicopter control system, flight simulator, and real time control simulation system. But it is difficult to establish a helicopter flight dynamics mathematical model that has features such as rapidness, reliability and precision, because there is no unique and precise expression to some sophisticated phenomenon of helicopter. In this paper a fuzzy helicopter flight model is constructed based on the flight experimental data. The fuzzy model, which is identified by fuzzy inference, has characteristics of computed rapidness and high precision. In order to guarantee the precision of the identified fuzzy model, a new method is adopted to handle the conflict fuzzy rules. Additionally, using fuzzy clustering technology can effectively reduce the number of rules of fuzzy model, namely, the order of the fuzzy model. The simulation results indicate that the method of this paper is effective and feasible. 展开更多
关键词 helicopter mathematical model fuzzy inference fuzzy clustering flight control
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A Comparative Analysis of Environmental Quality Assessment Methods for Heavy Metal-Contaminated Soils 被引量:33
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作者 LI Wei-Xin ZHANG Xu-Xiang +5 位作者 WU Bing SUN Shi-Lei CHEN Yan-Song PAN Wen-Yang ZHAO Da-Yong CHENG Shu-Pei 《Pedosphere》 SCIE CAS CSCD 2008年第3期344-352,共9页
Four assessment methods (two pollution indexes and two fuzzy mathematical models) were employed to investigate the environmental quality of four soils around a ferroalloy plant in Nanjing City. Environmental quality... Four assessment methods (two pollution indexes and two fuzzy mathematical models) were employed to investigate the environmental quality of four soils around a ferroalloy plant in Nanjing City. Environmental quality was assessed as class Ⅳ (moderately polluted) for each soil with single-factor index method, and was identified to be classes Ⅳ, Ⅲ (slightly polluted), Ⅲ, and Ⅲ for soils A, B, C, and D, respectively, with the comprehensive index model. In comparison with the single-factor index method, the comprehensive index model concerned both dominant parameter and average contribution of all factors to the integrated environmental quality. Using the two fuzzy mathematical methods (single-factor deciding and weighted average models), the environmental risks were determined to be classes Ⅳ, Ⅲ, Ⅱ (clean), and Ⅱ for soils A, B, C, and D, respectively. However, divergence of the membership degree to each pollution class still occurred between the two methods. In fuzzy mathematical methods, membership functions were used to describe the limits between different pollution degrees, and different weights were allocated for the factors according to pollution contribution. Introduction of membership degree and weight of each factor to fuzzy mathematical models made the methods more reasonable in the field of environmental risk assessment. 展开更多
关键词 environmental assessment fuzzy mathematical model heavy metal pollution pollution index method SOIL
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Knowledge Law and Attribute Disturbance of Law 被引量:3
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作者 ZHANG Guan-yu DU Ying-ling QIU Yu-feng 《Chinese Quarterly Journal of Mathematics》 CSCD 北大核心 2008年第2期245-251,共7页
By employing the knowledge(R-element equivalence class) in one direction S-rough sets and dual of one direction S-rough sets, the concept of knowledge law is given; the generation theorem of knowledge law, the excur... By employing the knowledge(R-element equivalence class) in one direction S-rough sets and dual of one direction S-rough sets, the concept of knowledge law is given; the generation theorem of knowledge law, the excursion theorem of knowledge law, and the attribute disturbance discernible theorem of knowledge law are proposed. Knowledge law is a new characteristic of S-rough sets. 展开更多
关键词 knowledge law attribute disturbance the balance theorem of law the excursion theorem of law the discernible theorem of law
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Realizing of Optimization of Binder Backfill Material Under Certain Strength with Fuzzy Sets 被引量:6
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作者 崔明义 胡华 《Journal of China University of Mining and Technology》 2001年第2期147-149,共3页
The main factors deciding the compressive strength of binder backfill body are tailing density and binder dosage in binder backfill materials. Based on the antecedent of certain pulp density, the method of increasing ... The main factors deciding the compressive strength of binder backfill body are tailing density and binder dosage in binder backfill materials. Based on the antecedent of certain pulp density, the method of increasing the tailing density and reducing the binder dosage, or the manner of cutting down the tailing density and gaining the binder dosage are taken to guarantee the strength of backfill body. The problem that should be solved is how to determine the tailing density and the binder dosage rationally. This paper tries to realize the correct selection of the tailing density and the binder dosage in computer with the method of fuzzy mathematics. 展开更多
关键词 tailing density binder dosage fuzzy sets backfill material compressive strength
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Automobile active suspension system with fuzzy control 被引量:3
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作者 刘少军 黄中华 陈毅章 《Journal of Central South University of Technology》 EI 2004年第2期206-209,共4页
A quarter-automobile active suspension model was proposed. High speed on/off solenoid valves were used as control valves and fuzzy control was chosen as control method . Based on force analyses of system parts, a math... A quarter-automobile active suspension model was proposed. High speed on/off solenoid valves were used as control valves and fuzzy control was chosen as control method . Based on force analyses of system parts, a mathematical model of the active suspension system was established and simplified by linearization method. Simulation study was conducted with Matlab and three scale coefficients of fuzzy controller (ke, kec, ku) were acquired. And an experimental device was designed and produced. The results indicate that the active suspension system can achieve better vibration isolation performance than passive suspension system, the displacement amplitude of automobile body can be reduced to 55%. Fuzzy control is an effective control method for active suspension system. 展开更多
关键词 active suspension system fuzzy control high speed on/off solenoid valve SIMULATION
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Attribute Disturbance of Knowledge and Attribute Disturbance Theorems 被引量:3
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作者 ZHANG Guan-yu DU Ying-ling 《Chinese Quarterly Journal of Mathematics》 CSCD 北大核心 2008年第4期574-581,共8页
By using the dynamic characteristic of one direction S-rough sets(one direction singular rough sets) and dual of one direction S-rough sets(dual of one direction singular rough sets), the concepts of attribute dis... By using the dynamic characteristic of one direction S-rough sets(one direction singular rough sets) and dual of one direction S-rough sets(dual of one direction singular rough sets), the concepts of attribute disturbance of knowledge, the attribute disturbance degree of knowledge, and the disturbance coefficient of knowledge are given. By employing these concepts, the cardinal order theorem of the attribute disturbance knowledge, the unit circle theorem of the attribute disturbance knowledge, and the discernible theorem of the attribute disturbance knowledge are presented. 展开更多
关键词 KNOWLEDGE attribute disturbance cardinal order theorem unit circle theorem knowledge discernment
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FUZZY MATHEMATICAL EVALUATION FOR MASONRY STRUCTURE BUILDINGS' DAMAGE GRADE CAUSED BY COAL MINING 被引量:3
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作者 连传杰 刘立民 高闯 《Journal of Coal Science & Engineering(China)》 1999年第1期33-37,共5页
Coal mining under buildings certainly causes surface movement and deformation, therefore, it brings about deformation even fracture for buildings. It is an important task to evaluate correcly the buildings’ damage gr... Coal mining under buildings certainly causes surface movement and deformation, therefore, it brings about deformation even fracture for buildings. It is an important task to evaluate correcly the buildings’ damage grabe caused by coal mining. Fuzzy comprehensive evaluation,considering some factors of buildings’ fracture, has been applied to analyze the masonry structure buildings’ damage grade affer coal mining in this paper. It provides a scientific basis for buildings’reidercement before mining and maintenance or compensation after mining. 展开更多
关键词 coal mining under buildings masonry structure building buildings' damage grade Fuzzy mathematical evaluation
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Finite Simple Lattice Implication Algebras 被引量:1
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作者 ZHU Yi-quan 《Chinese Quarterly Journal of Mathematics》 CSCD 北大核心 2008年第3期423-429,共7页
In this paper, some necessary and sufficient conditions that a finite lattice implication algebra is simple are established. Specially, it is proved that a finite lattice implication algebra L is simple if and only if... In this paper, some necessary and sufficient conditions that a finite lattice implication algebra is simple are established. Specially, it is proved that a finite lattice implication algebra L is simple if and only if (L, ≤) is a chain, if and only if there exists the unique dual atom in L. Also, it is given that a finite lattice implication algebra with order of a prime number is simple. 展开更多
关键词 lattice implication algebra SIMPLICITY PERIODICITY
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The construction and combined operation for fuzzy consistent matrixes 被引量:2
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作者 姚敏 沈斌 骆建华 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2005年第1期27-31,共5页
Fuzziness is one of the general characteristics of human thinking and objective things. Introducing fuzzy techniques into decision-making yields very good results. Fuzzy consistent matrix has many excellent characteri... Fuzziness is one of the general characteristics of human thinking and objective things. Introducing fuzzy techniques into decision-making yields very good results. Fuzzy consistent matrix has many excellent characteristics, especially cen- ter-division transitivity conforming to the reality of the human thinking process in decision-making. This paper presents a new approach for creating fuzzy consistent matrix from mutual supplementary matrix in fuzzy decision-making. At the same time, based on the distance between individual fuzzy consistent matrix and average fuzzy consistent matrix, a kind of combined opera- tion for several fuzzy consistent matrixes is presented which reflects most opinions of experienced experts. Finally, a practical example shows its flexibility and practicability further. 展开更多
关键词 Fuzzy consistent matrix Fuzzy consistent relation Compound operation
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Research on the fully fuzzy time-cost trade-off based on genetic algorithms 被引量:1
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作者 JIN Chao-guang JI Zhuo-shang +2 位作者 LIN Yan ZHAO Yuan-min HUANG Zhen-dong 《Journal of Marine Science and Application》 2005年第3期18-23,共6页
It is very difficult to estimate exact values of time and cost of an activity in project scheduling process because many uncertain factors, such as weather, productivity level, human factors etc. , dynamically affect ... It is very difficult to estimate exact values of time and cost of an activity in project scheduling process because many uncertain factors, such as weather, productivity level, human factors etc. , dynamically affect them during project implementation process. A GAs-based fully fuzzy optimal time-cost trade-off model is presented based on fuzzy sets and genetic algorithms (GAs). In tihs model all parameters and variables are characteristics by fuzzy numbers. And then GAs is adopted to search for the optimal solution to this model. The method solves the time-cost trade-off problems under an uncertain environment and is proved practicable through a giving example in ship building scheduling. 展开更多
关键词 fuzzy sets ranking fuzzy number genetic algorithms time-cost trade-off
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Optimal design of structural parameters for shield cutterhead based on fuzzy mathematics and multi-objective genetic algorithm 被引量:12
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作者 夏毅敏 唐露 +2 位作者 暨智勇 程永亮 卞章括 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第3期937-945,共9页
In order to improve the strength and stiffness of shield cutterhead, the method of fuzzy mathematics theory in combination with the finite element analysis is adopted. An optimal design model of structural parameters ... In order to improve the strength and stiffness of shield cutterhead, the method of fuzzy mathematics theory in combination with the finite element analysis is adopted. An optimal design model of structural parameters for shield cutterhead is formulated,based on the complex engineering technical requirements. In the model, as the objective function of the model is a composite function of the strength and stiffness, the response surface method is applied to formulate the approximate function of objective function in order to reduce the solution scale of optimal problem. A multi-objective genetic algorithm is used to solve the cutterhead structure design problem and the change rule of the stress-strain with various structural parameters as well as their optimal values were researched under specific geological conditions. The results show that compared with original cutterhead structure scheme, the obtained optimal scheme of the cutterhead structure can greatly improve the strength and stiffness of the cutterhead, which can be seen from the reduction of its maximum equivalent stress by 21.2%, that of its maximum deformation by 0.75%, and that of its mass by 1.04%. 展开更多
关键词 shield tunneling machine cutterhead structural parameters fuzzy mathematics finite element optimization
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Analysis of Noise at Coal Face by Fully-Mechanized Coal Winning Technology 被引量:1
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作者 刘照鹏 《Journal of China University of Mining and Technology》 2003年第1期113-116,共4页
The noise level of coal face by full-mechanized coal winning technology was measured in a coal mine. And then it was analyzed and evaluated using environment science, ergonomics and fussy mathematics analysis. Basis o... The noise level of coal face by full-mechanized coal winning technology was measured in a coal mine. And then it was analyzed and evaluated using environment science, ergonomics and fussy mathematics analysis. Basis of the statistics and analysis of the measured noise level some measures, such as applying the new materials and improving the construction of the equipment, were carried out. The resuts show that they can reduce the noise level, improve the working environment and enhance the work efficiency. 展开更多
关键词 noise coal face fully-mechanized coal winning technology ANALYSIS
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Fuzzy integral based measurement and assessment of medium and small enterprises'product innovation 被引量:1
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作者 毕克新 张铁柱 +1 位作者 孙金花 冯英浚 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2003年第3期278-283,共6页
A fuzzy integral based way of measurement assessment has been established by using linguistic varia-bles and combining fuzzy integral with hierarchy analysis for measurement of medium and small enterprises'product... A fuzzy integral based way of measurement assessment has been established by using linguistic varia-bles and combining fuzzy integral with hierarchy analysis for measurement of medium and small enterprises'product innovation. The conclusions drawn from analyses made with 20 medium and small enterprises providebases for governments to formulate applicable policies and for medium and small enterprises to enhance theirproduct innovation. 展开更多
关键词 medium and small enterprises (MSE) product innovation measurement and assessment fuzzy integral
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On the Model Properties of BCK Algebras
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作者 LIANGJun-qi 《Chinese Quarterly Journal of Mathematics》 CSCD 2004年第3期300-305,共6页
This paper is devoted to the study of the logical properties of BCK algebras. For formalized BCK algebra theory T, it is proved that T is preserved under submodels and unions of chains; T is neither complete nor model... This paper is devoted to the study of the logical properties of BCK algebras. For formalized BCK algebra theory T, it is proved that T is preserved under submodels and unions of chains; T is neither complete nor model complete, and hence there exist no built-in Skolem function. Moreover, the ultraproduct BCK algebras and the fuzzy ultraproduct of fuzzy subsets of BCK algebras were proposed by using the concept of ultrafilters with corresponding properties of fuzzy ideals discussed. 展开更多
关键词 BCK algebra mode complete COMPLETE ULTRAPRODUCT fuzzy ultraproduct
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Fuzzy prediction and experimental verification of road surface cleaning rate by pure waterjets
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作者 高道明 陈杰 鲁军波 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2005年第10期1115-1121,共7页
The cleaning parameters affecting cleaning rate using pure waterjets to clean road surface was researched. A mathematical model for predicting cleaning rate was established using fuzzy mathematical method. A fuzzy rul... The cleaning parameters affecting cleaning rate using pure waterjets to clean road surface was researched. A mathematical model for predicting cleaning rate was established using fuzzy mathematical method. A fuzzy rule base character-izing the relationship between input and output parameters was built through experiments. The prediction of cleaning rate was achieved under the condition of given input parameters by rule-based fuzzy reasoning. The prediction results were analyzed through experimental verification. 展开更多
关键词 Waterjets Cleaning rate Cleaning parameters Fuzzy rule base
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FUZZY REASONING IN CYCLES
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作者 曹立明 《Journal of China University of Mining and Technology》 1990年第1期117-122,共6页
By the similarity between the syllogism in logic and a path proposition in graph theory,a new concept,fuzzy reasoning graph G has been given in this paper. Transitive closure has been studied and used to do reasoning ... By the similarity between the syllogism in logic and a path proposition in graph theory,a new concept,fuzzy reasoning graph G has been given in this paper. Transitive closure has been studied and used to do reasoning related to self-loop in G,and an algorithm has been designed to cope with reasoning in other cycles in G. Both approaches are applicable and efficient. 展开更多
关键词 fuzzy reasoning SYLLOGISM CONSISTENT transitive closure ALGORITHM
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