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The environment of tailing reservoir greatly affects the environment around it. In this paper, a fuzzy analytic hierarchy process model is established to evaluate the environmental quality of tailing reservoir. By using of information entropy, a new weight calculation method which can evaluate the quality of information given by evaluation specialists is given, to amend the index subjective weight...
Extension detecting technology is a new technology developed to solve the detecting problems of physical measures undetectable by existing sensors. The basic principle and frame has been introduced several years before, but the implementing method of this technology is under development. In this paper, dependent function of extenics and the idea of fuzzy math is applied to construct an effective implementing...
Based on the relevant papers, some new properties such as weak null-additivity, auto-continuity from above (or from below), null-continuity from above (or from below) and convergence theorem of k-quasi-additive fuzzy integrals on fuzzy sets are given.
Rectangular fuzzy complex number is further discussed. An important theorem about closed fuzzy interval numbers and a theorem about consistent Hausdorff metric of rectangular fuzzy complex number are obtained. On the basis of these two theorems, the convergent theorem on the sequence of rectangular fuzzy complex numbers is proved.
There are big ripples on current and flux linkage and electromagnet torque under traditional direct torque control (DTC) on motor drive system. To solve these problems, fuzzy controller is designed to instead traditional hysteretic comparator, and zero voltage vectors are used to further reduce ripples. Rotor speed is estimated online by extended Kalman filter (EKF) algorithm. Speed sensorless DTC...
This paper is devoted to the development of an industrial design of a fuzzy controller for the refrigeration system of communications-room. Improved circulatory system strategies based on fuzzy logic are discussed to regulate the temperature. The design and development of the hardware circuitry necessary for implementation is also discussed. The design method with fuzzy logic allows taking into account...
In this paper, we firstly discuss some properties with respect to the credibility constraints. After that, we construct a new class of fuzzy generalized assignment problem with credibility constraints, in which the cost and time are uncertain and assumed to be characterized by fuzzy variables with known possibility distributions. The problem is a very changeable combinational optimization and it is...
This paper presents a fuzzy PI+D controller design for a direct drive motion control system actuated by permanent magnet linear synchronous motor (PMLSM). The employed Fuzzy PI+D is derived from the conventional continuous-time linear PI+D controller. The resulting controller is a discrete-time fuzzy version of the conventional PI+D controller. The proportional, integral and derivative gains are nonlinear...
This paper attempts to present a new class of fuzzy two-stage supply chain problem with minimum risk criteria in the sense of value-at-risk (VaR), in which the transportation cost coefficients and the demands are characterized by fuzzy variables with known possibility distributions. Since the fuzzy parameters has infinite supports, the conventional optimization algorithms cannot be used directly to...
In this paper, an improved fuzzy membership function determination is proposed to train the fuzzy support vector machine (FSVM) for classification which the sample set in reality environment is increasing, and it often contains a lot of noise and outliers. In the improved algorithm, the sample points have the different types of memberships in different regions. The dual membership is introduced to...
Off-line Chinese handwritten character segmentation usually includes the coarse and fine steps. In order to identify which regions that gotten through the coarse step should be merged or segmented again, a threshold is usually adopted. In this paper, a fuzzy threshold method is presented to adapt for the variety of unconstrained writing styles. First, the coarse segmentation region's distribution...
This paper analyses the characteristics of the arc furnace electrode regulator system, and also a design of fuzzy-PID control system. In order to to improve the performances of the fuzzy controller, the genetic algorithm is introduced to optimize parameter of fuzzy-PID controller. The simulations show that satisfied control effects can be achieved using optimal parameter of fuzzy-PID based on genetic...
A novel fuzzy weighted morphological filter is proposed for image edge detection, which based on weighted morphological operators and fuzzy morphological structuring elements (SE). It divided the filter window into four sub-windows, and selects the least variance sub-window and its mean of pixels is given. If the difference value between the pixel value and the mean is small, a big weight factors...
The objective of this paper is to build a real options model under hybrid uncertain environment of randomness and fuzziness. In order to well describe the real uncertain situation, we utilize fuzzy random variable as a tool to characterize future cash flows, and propose a new real options analysis approach by combing binomial lattice-based model with fuzzy random variable, as named fuzzy random real...
This paper introduces a new definition of intuitionistic fuzzy (IF for short) inclusion measure. Five kinds of IF inclusion measure are constructed by means of different operators especially by IF implicator. It is shown that the similarity measure between two IF sets obtained from IF inclusion measure hold properties of normal similarity measure.
In this paper, we mainly study the relationship between IF rough approximation operators and IF topological spaces. First, we discuss IF topologies generated by IF approximation space and IF approximation space generated by IF topologies. Then we discuss the relationship between IF topologies generated by IF approximation space and IF approximation space generated by IF topologies. Finally, we study...
The main steam temperature control system is necessary to ensure high efficiency and high load-following capability in the operation of modern power plant, which has the characteristics of large inertia, large time-delay and time-varying, etc. Thus conventional PID control strategy cannot achieve good control performance. Prompted by the feedback regulation mechanism of biology immune response and...
This paper reports our preliminary result of microstate analysis for the spatiotemporal characteristics of Chan-meditation brain wave (electroencephalograph, EEG) based on time-varying dipolar-vector model of the alpha-map. Microstate behavior reveals subtle transience of focalized event. Multi-channel alpha-event epochs were identified by Wavelet decomposition and feature extraction. Global field...
This paper first deduces expected value formulas for fuzzy variables. After that, we present a new class of fuzzy two-stage location-allocation problems. To solve the two-stage location-allocation problem, this paper designs a hybrid algorithm which integrates the approximation method and particle swarm optimization (PSO) algorithm. Finally, an application example is considered to demonstrate the...
In this paper we present a new method for solving multicriteria decision making problem in an interval-valued intuitionistic fuzzy environment. Firstly, we introduce a score function and an accuracy function for ranking the order of interval-valued intuitionistic fuzzy sets. Then, we obtain the criteria's optimal weights via a linear programming model to rank the alternatives and select the best one(s)...
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