Ma Li

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In this paper we consider the system of M/M/N queue with service interruptions, the rates of server breakdown are different between busy time and idle time, and there is one repairman in its system. We give out the group of equations for the steady state distribution of the number of effective servers. We obtain the steady-state probabilities of the states(More)
We present the ab-plane optical conductivity of four single crystals of Bi 2 Sr 2 CaCu 2 O 8+␦ ͑Bi2212͒ with different carrier doping levels from the strongly underdoped to the strongly overdoped range with T c = 66, 88, 77, and 67 K, respectively. We focus on the redistribution of the low frequency optical spectral weight ͑SW͒ in the superconducting and(More)
We consider a new, adaptive approach to unsupervised textured region segmentation. There are three phases within each iteration of the process: (1) Gabor filter based feature extraction; (2) Fuzzy clustering of texture homogeneity to yield a spatial segmentation; and (3) An optimization procedure to update the filter parameters. The selection objective used(More)
A multi-attribute group decision making (MAGDM) method, based on comprehensive satisfaction evaluations that are derived from the preference of all decision makers, is presented to solve the decision data sampling problems in a fuzzy situation where the decision data and weights of all attributes take the form of generalized trapezoidal fuzzy numbers(More)
The principles of the immune system and Monoclonal were introduced briefly. Focused on the text expressed by the vector space model which was processed by semantic computation, an adaptive polyclonal clustering algorithm was proposed. Firstly, the calculation method was defined for the affinity between antibody and antigens and the affinity of antibodies,(More)
  • Ma Li, Wu Dan
  • 2009
Informatization construction in the small and medium building material enterprise in China has been pressing for the moment. However, due to the restrictions of financing, human resources, technology and so forth, the achievement of informatization has none the less many difficulties. The managing concept of “software as a service” (the mode(More)
  • Ma Li, Ma Ji
  • 2015
Graphic color which is obtained from traditional escape time algorithm is very single and it cannot effectively reflect structural characteristics of M set and J set so image cannot be effectively applied in generalized scope. This paper introduces genetic algorithm and integrates user preferences into genetic process by adding human-computer interaction in(More)
Image segmentation plays an important role in medical image processing. Fuzzy c-means (FCM) clustering is one of the popular clustering algorithms for medical image segmentation. However, FCM has the problems of depending on initial clustering centers, falling into local optimal solution easily, and sensitivity to noise disturbance. To solve these problems,(More)
This paper presents a novel formulation of electrical machine design for position sensorless control. Several quantitative characteristic values were defined for measuring the capacity of sensorless control. A multi-objective optimization is formulated for the design of a surface-mount permanent magnet motor in order to improve its sensorless capability(More)