Condition Assessment of Regenerative Heater Based on Fuzzy Comprehensive Evaluation

2014 ◽  
Vol 687-691 ◽  
pp. 206-211
Author(s):  
Wei Dong Zheng ◽  
Pei Hong Wang
Keyword(s):  
Comprehensive Evaluation ◽  
Evaluation Model ◽  
Fuzzy Comprehensive Evaluation ◽  
Indicator System ◽  
Fuzzy Evaluation ◽  
Level Indicator ◽  
Comprehensive Evaluation Model ◽  
Evaluation Indicator System ◽  
Definition Of ◽  
Fuzzy Mathematic

In order to evaluate the performance of regenerative heater comprehensively and scientifically, the fuzzy comprehensive evaluation model of regenerative heater is proposed on the basis of fuzzy mathematic theory as well as the relevant background knowledge of the problem. In the fist-level fuzzy comprehensive evaluation model, the evaluation indicator system was established taking the influence of the turbine load into consideration. The definition of “excellence degree” was given to show the relative approach degree between the quantitative indicator and the excellent indicator. Membership functions of fuzzy evaluation set were constructed based on the excellence degree. Knowledge in terms of twenty experts’ experience and historical data was used to determine the indicator weight set. In the second-level indicator fuzzy comprehensive evaluation model, four composition operator models were selected to conduct the fist-level evaluation. The proposed model turns out to be feasible and effective by three typical load conditions.

scholarly journals Open-channel landslide hazard assessment based on AHP and fuzzy comprehensive evaluation

2020 ◽  
Vol 20 (8) ◽  
pp. 3687-3696
Author(s):  
Xi Wang ◽  
Shuangyin Wang ◽  
Jiashuo Qi
Keyword(s):  
Water Supply ◽  
Hazard Assessment ◽  
Open Channel ◽  
Comprehensive Evaluation ◽  
Evaluation Model ◽  
Fuzzy Comprehensive Evaluation ◽  
Indicator System ◽  
Water Diversion ◽  
Comprehensive Evaluation Model ◽  
Hazard Level

Abstract Cross-regional water diversion projects usually face risks of hazards, in particular high risks of sudden landslides on the slopes of water supply open channels. Determining the hazard level rapidly after a hazard occurs plays a critical role in improving the efficiency of emergency response and recovering the water supply capacity of the projects. Through in-depth analysis of the factors that affect the severity of open-channel landslides, an indicator system for hazard assessment of open-channel landslides was established and the criteria for evaluation of different hazard levels were identified. Based on the hierarchy of the indicator system, a two-level fuzzy comprehensive evaluation model was established to assess the impact of indicators in the model on the hazard level of open-channel landslides, and the weight of each indicator was determined by the analysis hierarchy process. The linear function was used to calculate the membership degree of each indicator to determine the hazard level. A hazard scenario was created with the water diversion project from the Irtysh River to Urumqi as an example, and the two-level fuzzy comprehensive evaluation model was applied to conduct hazard assessment. The proposed method was confirmed to be reasonable and practical.

scholarly journals Evaluating Reputation of Internet Financial Platform: An Improved Fuzzy Evaluation Approach

2021 ◽  
Vol 2021 ◽  
pp. 1-18
Author(s):  
Ge You ◽  
Hao Guo ◽  
Abd Alwahed Dagestani ◽  
Shuai Deng
Keyword(s):  
Comprehensive Evaluation ◽  
Fuzzy Comprehensive Evaluation ◽  
Indicator System ◽  
Two Dimensions ◽  
Investment Risk ◽  
Fuzzy Evaluation ◽  
Analytic Hierarchy ◽  
Evaluation Approach ◽  
Determination Process ◽  
Evaluation Indicator System

Recent frequent “thunderstorm incidents” of the internet financial platforms (IFPs) have caused the panic of investors. In order to measure and reduce the investment risk of IFPs, the focus of this study is to evaluate the reputation of IFPs regarding investment risk. First, the reputation evaluation indicator system of IFPs is constructed from two dimensions of direct and indirect reputations. Then, based on this system, an improved fuzzy evaluation approach (IFEA) integrating the method of fuzzy comprehensive evaluation (FCE), the analytic hierarchy process (AHP), and the factor analysis (FA) are proposed for evaluating the reputation of IFPs. Finally, a case study based on the data of 20 peer-to-peer (P2P) lending platforms from “Home of Online Loans” (HOL) in China is used to illustrate the IFEA. Results show that the IFEA can reduce uncertainty and randomness in the determination process of indicator weight and membership degree and therefore accurately obtain the reputation level of IFPs and help investors make better decisions. Meanwhile, the key factors in determining the reputation of IFPs are identified, thereby improving the reputation level of the IFPs.

scholarly journals Quantitative Assessment of City’s Smart Growth Level in China Using Fuzzy Comprehensive Evaluation

2018 ◽  
Vol 175 ◽  
pp. 04023
Author(s):  
Jie Min ◽  
Baoquan Cheng ◽  
Shunxiang Gao ◽  
Zhenjie Luo ◽  
Kai Zhu ◽  
...  
Keyword(s):  
Quantitative Assessment ◽  
Comprehensive Evaluation ◽  
Evaluation Model ◽  
Smart Growth ◽  
Fuzzy Comprehensive Evaluation ◽  
Indicator System ◽  
Development Plan ◽  
Large Cities ◽  
Comprehensive Evaluation Model

In this paper we develop an indicator system to evaluate the Smart Growth Level based on 3E’s principles and calculate the Smart Growth Level of 70 mid-scale and large cities in China using fuzzy comprehensive evaluation model. We also divide these cities into four grades: outstanding, good, normal and terrible. The results are significant for governments to design a reasonable development plan.

Efficiency Evaluation Model of Power Transmission & Transformation Project Investment Based on AHP-Fuzzy Method

2013 ◽  
Vol 732-733 ◽  
pp. 1303-1307 ◽  
Author(s):  
Gui Shen Tian ◽  
Ji Cheng Liu ◽  
Jing Jing Zhou ◽  
Jun Li Liu ◽  
Bing Li
Keyword(s):  
Evaluation Method ◽  
Power Transmission ◽  
Comprehensive Evaluation ◽  
Evaluation Model ◽  
Fuzzy Comprehensive Evaluation ◽  
Indicator System ◽  
Efficiency Evaluation ◽  
Fuzzy Evaluation ◽  
Evaluation Result ◽  
Evaluation Matrix

This article builds an efficiency evaluation model. Using AHP method, an evaluation indicator system is established, and the weights of the indicators are calculated. This paper applies Fuzzy Evaluation method to determine the membership function of qualitative and quantitative indicators, and then synthesizes the indicator weights and the evaluation matrix to get the fuzzy comprehensive evaluation result. Finally, a case of a certain power transmission & transformation project is studied, and the comprehensive evaluation result of its economic benefit is moderate.

Study on Fuzzy Comprehensive Evaluation Model of Printing Quality Based on AHP Method

2010 ◽  
Vol 174 ◽  
pp. 243-246 ◽  
Author(s):  
Jun Wang ◽  
Tie Feng Zhang ◽  
Xiang Yi Guan
Keyword(s):  
Comprehensive Evaluation ◽  
Evaluation Model ◽  
Subjective Evaluation ◽  
Pairwise Comparison ◽  
Fuzzy Comprehensive Evaluation ◽  
Objective Evaluation ◽  
Fuzzy Evaluation ◽  
Printing Quality ◽  
Comprehensive Evaluation Model ◽  
Comparison Judgment

A fuzzy comprehensive evaluation model of printing quality was established by using the method of fuzzy evaluation and analytical hierarchy process(AHP).The main parameters which influence printing quality were analyzed. The factor set to constitute fuzzy comprehensive evaluation was confirmed. The structure of analytical hierarchy was established by analyzing different plans, which influences printing quality evaluation. Comparison judgment matrixes were constructed by pairwise comparison of each factor using Saaty 1-9 scales. The weights of every factor were determined by calculating the feature vectors of comparison judgment matrixes and the consistency test. Finally the printing quality hierarchy was evaluated by using fuzzy comprehensive evaluation and according to maximum membership principle. The result indicated that the model objectively determined the weights of parameters which influence printing quality, subjectively evaluated the printing quality hierarchy, and realized the unification of subjective evaluation and objective evaluation.

Research on Performance Evaluation Based on Fuzzy Analysis

2013 ◽  
Vol 380-384 ◽  
pp. 1270-1273
Author(s):  
Zhao Hui Zheng
Keyword(s):  
Analytic Hierarchy Process ◽  
Service Providers ◽  
Comprehensive Evaluation ◽  
Evaluation Model ◽  
Fuzzy Comprehensive Evaluation ◽  
Indicator System ◽  
Fuzzy Evaluation ◽  
Analytic Hierarchy ◽  
Education Performance ◽  
Hierarchy Process

How to evaluate vocation education performance is one of the difficulties and hot research fields for the researchers related. The paper presents a new model for evaluating vocation education performance based on the principle of analytic hierarchy process and fuzzy comprehensive evaluation. First an evaluation indicator system of vocation education performance is designed through analyzing the characteristics of vocation learners behavior; Secondly in constructing the comprehensive evaluation model for vocation education performance, analytic hierarchy process and fuzzy comprehensive evaluation are combined and two level fuzzy evaluation is adopted to satisfy the dynamics, subjective and transitional characteristics of indicators and improve evaluation accuracy. Thirdly datum from three vocational colleges are taken for examples to verify the validity and feasibility of the model and the experimental results show that the model can evaluate vocation education performance practically and can help vocation education service providers take corresponding concrete measures to enhance its education performance.

Fuzzy Evaluation Based on Interval-Valued in the Application of Driver Traffic Behavior

2013 ◽  
Vol 869-870 ◽  
pp. 281-287
Author(s):  
Yao Nan Li ◽  
Guo Zhong Ma
Keyword(s):  
Traffic Safety ◽  
Comprehensive Evaluation ◽  
Evaluation Model ◽  
Fuzzy Comprehensive Evaluation ◽  
Evaluation Index System ◽  
Fuzzy Evaluation ◽  
Safety Behavior ◽  
Basic Algorithm ◽  
Comprehensive Evaluation Model ◽  
Interval Valued

The paper discusses the definition of interval number and basic algorithm. It also described the problem of interval ranking and introduced interval-valued fuzzy comprehensive evaluation model. The model is more suitable for evaluation of many factors, weight distribution than the uniform case.Interval-valued fuzzy comprehensive evaluation model to judge the field of driver traffic safety behavior. According to literature reviews to establish the evaluation index system and set .Then determine the weight of different factors and required basic data by the expert scoring. Finally, the results of the evaluation model is excellent.The application examples explain that the method can effectively reduce the loss of information which with good results.

Intelligent Lighting Control System in Large-Scale Sports Competition Venues

2018 ◽  
pp. 172-182 ◽  
Author(s):  
Shengmin CAO
Keyword(s):  
Control System ◽  
Large Scale ◽  
Comprehensive Evaluation ◽  
Evaluation Model ◽  
Fuzzy Comprehensive Evaluation ◽  
Practical Significance ◽  
Lighting Control ◽  
Sports Events ◽  
Planning And Design ◽  
Comprehensive Evaluation Model

This paper mainly studies the application of intelligent lighting control system in different sports events in large sports competition venues. We take the Xiantao Stadium, a large­scale sports competition venue in Zaozhuang City, Shandong Province as an example, to study its intelligent lighting control system. In this paper, the PID (proportion – integral – derivative) incremental control model and the Karatsuba multiplication model are used, and the intelligent lighting control system is designed and implemented by multi­level fuzzy comprehensive evaluation model. Finally, the paper evaluates the actual effect of the intelligent lighting control system. The research shows that the intelligent lighting control system designed in this paper can accurately control the lighting of different sports in large stadiums. The research in this paper has important practical significance for the planning and design of large­scale sports competition venues.

Fuzzy Comprehensive Evaluation of Human Performance Management

2013 ◽  
Vol 756-759 ◽  
pp. 715-719
Author(s):  
Huan Cheng Zhang ◽  
Ya Feng Yang ◽  
Feng Li ◽  
Li Nan Shi
Keyword(s):  
Performance Management ◽  
Evaluation System ◽  
Human Performance ◽  
Comprehensive Evaluation ◽  
Evaluation Model ◽  
Fuzzy Comprehensive Evaluation ◽  
Assessment Process ◽  
College Performance ◽  
Performance Evaluation System ◽  
Comprehensive Evaluation Model

In the College, performance evaluation system is directly related to the harmonious development of the school. Taking into account the factors in the evaluation system is fuzzy, so this paper uses fuzzy comprehensive evaluation model. But the model is too subjective, so this paper combines neural network and data envelopment analysis method, which ensures that fuzzy comprehensive evaluation model is reasonable and scientific, and good school development and teacher self-interest. The performance assessment process, not only enables the combination of qualitative and quantitative analysis, but also fair and reasonably reflect the achievements of teachers, while this method is easy to use, wide application, and can be well applied in practice.

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