Excessive lose of customer account is becoming a major headache for VIP E-Mail hosting companies. Analysis of what kind of customer is more prone to lose and finding the appropriate measures to sustain those customers...
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The type of the leaf vein can be a useful parameter in automatic identification of plant species. Leaf vein extraction is the precondition of discriminating the leaf vein type. In this paper a new method is presented ...
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In this paper we present a glancing review of how to define the time schedule of Simulated Annealing (SA) algorithm in different articles that applied them to solve the traveling salesman problem (TSP). In the followi...
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ISBN:
(纸本)9787894631046
In this paper we present a glancing review of how to define the time schedule of Simulated Annealing (SA) algorithm in different articles that applied them to solve the traveling salesman problem (TSP). In the following subjects we introduce a new definition of this concept in relation to other parameters. In other word, we claim a novel description of initial temperature, Markov chain and final temperature to the basic algorithm of SA that gives an introduction to New Time Schedule Simulated Annealing (NTSSA). In this method, the dynamic coincidence of time schedule parameters and temperature conditions is a possible happening among the searching process. In continuation we present the obtaining results of proposed algorithm in solving TSP in comparison with basic methods of SA and other intelligent optimization methods. The surprising improvement in results obtained by this approach shows the efficiency of NTSSA in contrast with other basic optimization methods.
This paper presents the fuzzy modeling approach to the description QV curve of power system for analysis of voltage stability. Voltage instability of power system comes from increasing load rapidly, and causes bus vol...
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ISBN:
(纸本)9789604741748
This paper presents the fuzzy modeling approach to the description QV curve of power system for analysis of voltage stability. Voltage instability of power system comes from increasing load rapidly, and causes bus voltage to drop. When voltage is out of control and it can be voltage collapse. The QV curve can identify voltage stability limit, and it determine robustness of power system. The method of fuzzy modeling has been proven to be well-suited for modeling nonlinear industrial processes described by input-output data. In view of the nonlinear characteristic of the QV curve, the method of fuzzy modeling is employed for representing the curve. The fuzzy system model is basically a collection of fuzzy IF-THEN rules that are combined via fuzzy reasoning for describing the features of a system under study. Based on the Sugeno-type fuzzy model, various models with different numbers of modeling rules are used to describing the QV curve. It is found that such fuzzy model offers both quantitative and qualitative descriptions for the QV curve.
This paper presents the design of modal insensitivity for the synchronous generator in a power system using Eigenstructure Assignment. In the proposed design procedure, modal insensitivity of generator is achieved by ...
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ISBN:
(纸本)9789604742332
This paper presents the design of modal insensitivity for the synchronous generator in a power system using Eigenstructure Assignment. In the proposed design procedure, modal insensitivity of generator is achieved by assigning system eigenstructure and only algebraic computations are involved. Model insensitivity means that the concerned system mode shape is insensitive to small variations in the system. From the simulation results of the study in a single-machine-infinite-bus system are certified. It is found that the system damping has been greatly improved. The proposed design has improved on the sensitivity.
This paper used six formulas for power factor measurement, and they will be different according to the characteristics of load. The power quality is more and more serious, because a lot of information technology equip...
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ISBN:
(纸本)9789604741748
This paper used six formulas for power factor measurement, and they will be different according to the characteristics of load. The power quality is more and more serious, because a lot of information technology equipments and power electric converters were used in recent years. Harmonic and load unbalance can affect the measurement result of power factor of utility. The Fast Fourier Transform (FFT) is used to analyze the six formula of power factor. The simulation system was modeled in Hardware Description Language (VHDL) and some novel IP (intellectual property) cores, such as CORDIC core and FFT core by the way of Bottom-Up. The technology of semiconductor was more and more maturely. Design of SOC (System On a Chip) is a trend to achieve the strong and small volume in the future. The measurement data were employed to calculate active, reactive and apparent power. The average error rate of our design is about 0.05%.
Verlhust logistic map f(x) = r x (1 - x) is a widely studied and applicable model in discrete dynamical system. Its behavior has been, extensively, studied in Picard orbit and recently studied in superior orbit. Rani ...
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Acquisition of pervasive sensor data can be often unsuccessful due to power outage at nodes, time synchronization issues, interference, network transmission failures or sensor hardware issues. Such failures can lead t...
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Real-time monitoring and quantification of any physical, chemical, and/or mechanical variations within a given environment may be useful for different science and engineering systems. For instance, these type of senso...
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This paper presents a new method that solves a mixed constraints problem by transforming it into a mixed integer programming problem. The method builds the connection between the feasibility of a mixed constraint prob...
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