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 共查询到19条相似文献,搜索用时 93 毫秒
1.
A method for ranking complementary judgment matrixes with traspezoidal fuzzy numbers based on Hausdorff metric distance and fuzzy compromise decision approach is proposed. With regard to fuzzy number complementary judgment matrixes given by a decider group whose members have various weights, the expert's information was aggregated first by means of simple weight average(SWA) method and Bonissone calculational method. Hence a matrix including all the experts' preference information was got. Then the matrix' column members were added up and the fuzzy evaluation values of the alternatives were got. Lastly, the Hausdorff metric distance and fuzzy compromise decision approach were used to rank the fuzzy evaluation values and then the ranking values of all the alternatives were got. Because exact numbers and triangular fuzzy numbers could all be transformed into trapezoidal fuzzy numbers, the method developed can rank complementary judgment matrixes with trapezoidal fuzzy numbers, triangular fuzzy numbers and exact numbers as well. An illustrative example is also given to verify the developed method and to demonstrate its feasibility and practicality.  相似文献   

2.
A novel mercer kernel based fuzzy clustering self-adaptive algorithm is presented. The mercer kernel method is introduced to the fuzzy c-means clustering. It may map implicitly the input data into the high-dimensional feature space through the nonlinear transformation. Among other fuzzy c-means and its variants, the number of clusters is first determined. A self-adaptive algorithm is proposed. The number of clusters, which is not given in advance, can be gotten automatically by a validity measure function. Finally, experiments are given to show better performance with the method of kernel based fuzzy c-means self-adaptive algorithm.  相似文献   

3.
New Image Recognition Method Based on Rough-Sets and Fuzzy Theory   总被引:1,自引:0,他引:1  
A new image recognition method based on fuzzy-rough sets theory is proposed, and its implementation discussed. The performance of this method as applied to ferrography image recognition is evaluated. It is shown that the new method gives better results than fuzzy or rough-sets method when used alone.  相似文献   

4.
Aimed at defects of the gear-position decision in an automatic mechanical transmission, a method of synthetic shift schedule of 5-speed gear-position is presented, which is based on the fuzzy discernment of the driver intention and the road characteristics. A contrastive experimental analysis between the synthetic gear-position decision method and the traditional gear-position decision method is given by analyzing Santana 2000.  相似文献   

5.
Slope stability assessment is a geotechnical problem characterized by many sources of uncertainty. In classical reliability analysis, only the randomness of uncertainties is taken into account but the fuzziness of them is ignored.In this paper, a fuzzy probability approach and a fuzzy JC method are presented for the reliability analysis. The two methods have been applied to stability analysis of a certain slope of permanent ship lock in the Three-Gorges Project. The results obtained from these two methods are basically the same. However, compared with the fuzzy probability means, the fuzzy JC method can reflect the real situation better because it uses a fuzzy-based analysis applied to not only limit state equation but also mechanical parameters.  相似文献   

6.
The main role of water treatment plants is to supply high-quality safe drinking water. Coagulation is one of the most important stages of surface water treatment. The photometric dispersion analyzer(PDA) is a new optical method for flocculation monitoring, and is feasible to realize coagulation feedback control. The on line modification of the coagulation control system‘s set point( or optimum dosing coagulant) has influenced the application of this technology in water treatment plant for a long time. A fuzzy control system incorporating the photometric dispersion analyzer was utilized in this coagulation control system. Proposed is a fuzzy logic inference control system by using Takagi and Sugeno‘ s fuzzy if-then rule for the self-correction of set point on line.Programmed is the dosing rate fuzzy control system in SIEMENS small-scale programmable logic controller. A400 L/min middle-scale water treatment plant was utilized to simulate the reaction. With the changes of raw water quality,the set point was modified correctly in time,as well as coagulant dosing rate, and residual turbility before filtration was eligible and stable. Results show that this fuzzy inference and control system performs well on the coagulation control system through PDA.  相似文献   

7.
This paper presents an expert-based fuzzy analytic hierarchy process (AHP) model for evaluating emergency response capacity of Chemical Industrial Park (ERCCIP) by jointly using an improved fuzzy preference programming (FPP) and 2-tuple fuzzy linguistic approach. An evaluation index system for ERCCIP is proposed. The weight of sub-criteria and criteria of the evaluation index system for ERCCIP are determined using the improved FPP. And the ratings of sub-criteria are assessed in linguistic values according to the experts' subjective opinions. Finally, the aggregated ratings of criteria and the overall ERCCIP are calculated.  相似文献   

8.
Based on Matlab/Simulink and Fuzzy Logic toolboxes,the altitude control system is designed and simulated.The validity of conventional PID control method and adaptive fuzzy PID control method is compared.It can be drawn out that the adaptive fuzzy PID control method is superior to the conventional PID in rising time and overshoot etc.The effectiveness of a fuzzy PID controller shows potential application in the future,especially in the presence of model uncertainty or changing dynamics and time-varying parameters.  相似文献   

9.
10.
Abstract: In order to improve the accuracy of vertical handoff decision for radio heterogeneous network, this paper proposes an intelligent adaptive multi-criteria vertical handoff (AMVHO) decision algorithm. This algo- rithm uses a fuzzy inference system (FIS) and a modified Elman neural network (MENN). The FIS adopts the crucial criteria of vertical handoff as input variables and makes handoff decision based on the defined rule base. The MENN helps to predict the number of users of the after-handoff network, which is a pivotal variable of the FIS. Simulation results show that, compared with the conventional method, the AMVHO decision algorithm a- chieves better performance in guaranteeing the quality of service (QoS) of the after-handoff communication.  相似文献   

11.
分析了智能大厦系统规划方案的作用,提出采用模糊多属性群体决策法对系统规划方案进行评价,给出了模糊判断矩阵和隶属度的构造方法,详细介绍了模糊多属性群体决策法在智能大厦的系统规划方案决策中的计算步骤及方法。  相似文献   

12.
针对属性值均为模糊变量,属性权重完全未知但给出方案偏好值的模糊多属性决策问题给出了决策方法。该方法通过建立一个模糊期望值目标规划模型来确定属性的权重,基于简单加权平均法则来计算方案的模糊综合评价值,利用比较模糊变量大小的期望值方法来对方案进行排序。最后通过实例说明了该决策方法的可行性和有效性。  相似文献   

13.
针对语言直觉模糊偏好关系下的群决策问题,本文提出一种考虑加法一致性和群共识的决策方法。该方法主要通过局部迭代算法提高语言直觉模糊偏好关系的一致性和强化共识达成过程并尽可能地保留原始合理信息。文章提出一个转化方法将标准直觉模糊权重向量转化成加法一致的语言直觉模糊偏好关系并建立一个目标规划模型求出标准直觉模糊权重;对于加法不一致的语言直觉模糊偏好关系,提出局部迭代方法来提高一致性;建立加强的共识达成过程来帮助决策者找到满意解。为了更好地使用本文提出的决策方法,给出一个整体决策算法。最后通过一个具体的案例说明该方法是合理有效的。  相似文献   

14.
针对模糊环境下的公路施工组织管理,基于网络流模型,提出了确定模糊网络关键路线的参数线性规划方法,并给出了反映决策者偏好信息的模糊网络关键路线和工程模糊完工期的隶属函数形式,从而得到了模糊网络关键路线性质的更全面的结果.结合公路施工组织管理的实例,介绍了方法的应用.  相似文献   

15.
针对属性值为三角模糊数且只有部分权重信息的多属性决策问题给出了逼近理想点法.该方法首先提出了规范化决策矩阵的新的计算公式,然后通过求解两个线性规划模型来确定属性的权重,再利用两个三角模糊数之间的距离分别计算各方案到模糊理想点和模糊负理想点的距离,最后根据各方案与模糊理想点的相对贴近度的大小排序得到方案的优劣排序.  相似文献   

16.
部分权重信息下的三角模糊数型多属性决策方法   总被引:10,自引:0,他引:10  
针对属性值为三角模糊数且只有部分权重信息的多属性决策问题给出了逼近理想点法。该方法首先提出了规范化决策矩阵的新的计算公式,然后通过求解两个线性规划模型来确定属性的权重,再利用两个三角模糊数之间的距离分别计算各方案到模糊理想点和模糊负理想点的距离,最后根据各方案与模糊理想点的相对贴近度的大小排序得到方案的优劣排序。  相似文献   

17.
公路施工组织管理的模糊网络计划技术   总被引:6,自引:0,他引:6  
针对模糊环境下的公路施工组织管理,基于网络流模型,提出了确定模糊网络关键路线的参数线性规划方法,并给出了反映决策者偏好信息的模糊网络关键路线和工程模糊完工期的隶属函数形式,从而得到了模糊网络关键路线性质的更全面的结果.结合公路施工组织管理的实例,介绍了方法的应用.  相似文献   

18.
针对权重信息不完全,决策者对方案有偏好的三角模糊型多属性决策问题提出了一种新方法。该方法是首先对三角模糊数求截集,将三角模糊数转化为区间数并引入偏差函数,然后建立目标线性规划模型并利用Lingo软件求出属性权重向量,进而对截集下的方案进行排序。  相似文献   

19.
研究了属性值为模糊数的多属性决策问题,定义了一个新的三角模糊数模糊距离公式,利用此距离公式,提出了一种解决属性值为模糊数的多属性决策问题的新方法,该方法简单,计算量小,为解决多属性决策问题提供了一个新途径.  相似文献   

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