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This paper extends the unlimited capacity location problem with fixed cost in a competitive environment where a firm tends to enter the market competing for exotic products. The demands will increase if a new facility sets into the market. And the demands will be served by both the nearest facilities of the two competitors. A revenue maximization model is presented and a greedy adding and substitution...
Procedural textures have been widely used as they can be easily generated from various mathematical models. However, the model parameters are not perceptually meaningful or uniform for non-expert users. In this paper, we proposed a system that can generate procedural textures interactively along certain perceptual dimensions. We built a procedural texture dataset and measured twelve perceptual properties...
Vegetation water content (VWC) plays an important role in parameterizing the vegetation influence on microwave soil moisture retrieval. During the past decade, relationships have been developed between VWC and vegetation indices from satellite optical sensors, in order to create large-scale VWC maps based on these relationships. Among existing vegetation indices, the normalized difference vegetation...
Intelligent decision support system involves lots of calculations and analysis, and this will affect the operational efficiency of the system. This paper raised that integrate matlab into the IDSS, and let it compute data alone, which will improve the efficiency of the system and so that system designed and implemented will be easier and more convenient to be used. Finally an example is given in combination...
A method estimating the position of the rotor based on arithmetic model of the motor was presented. In this method, mathematical mode of PMSM was regarded as reference model. By detecting the phase current of PMSM, the real position of the rotor of PMSM is calculated. Simulation and experimental results proved that the proposed method was capable of precisely estimating the rotor position and speed...
In model based selective catalytic reduction (SCR) control, because of the nonlinearities and immeasurable properties of the SCR physical background, model parameterization is always a problem to be solved. In this paper, a new method based on the nonlinear least square method is developed to estimate the parameters in a SCR model. The SCR system state functions are specially designed in terms of...
In this paper, the reaction kinetics of the selective catalytic reduction (SCR) is briefly introduced, and a non-cell mathematical model describing the thermal and chemical process of the SCR catalytic converter is given. Based on the one-cell model, identical SCR cell models can be seriously connected to simulate a real SCR converter performance. Consequently, the SCR catalytic converter model in...
Liquefied Natural Gas (LNG) is being developed as a transportation fuel for transit buses, to lessen the dependency on oil and to reduce greenhouse gas emissions. But LNG is hazardous because of its temperature, the possibility of asphyxiation and of course the fire risk. This paper describes the use of Fluent, a widely-used commercial CFD code, to simulate the dynamics of spills from LNG bus fuel...
Study and analysis the fuel leakage security of current LNG alternative fuel bus. Do the simulation on surrounding concentration and temperature of LNG bus fuel tank leakage by Computational Fluid Dynamics (CFD). By analyzing the influence of three different bus velocities, 0km/h, 30km/h and 80km/h, we have the conclusion from the simulation that when the bus gets faster, the influence of surrounding...
Free bending with no bottoming is commonly applied in various industrial productions because of its versatile forming characteristics. And full application in the large-diameter longitudinal welded pipes production shows the superiority of this forming method. This paper adopts a scientific experimental design method to carry out physical modeling and simulation study on the wide-plate air bending...
The simulative modules of speed regulating system of BLDCM were built based on the mathematical model. The transfer function of the rotating speed was obtained. The fuzzy PID parameters of self-adaptive controller were introduced. The function of PID controller was improved according to both the error and the variety rate. The simulative results show that self-adaptive Fuzzy-PID Control has faster...
It is well know that microwave fading channel is a complicated channel. This channel may cause inter-symbol interference(ISI) ,channel equalization is a good way to deal with ISI. Taking advantage of the achievements of past researchers. We combine them into a novel improved max-log-map turbo equalization method. The simulation results based on a given microwave fading channel show that the improved...
To solve the premature convergence problem of particle swarm optimization, two novel methods are introduced to adjust the inertia weight in parallel according to different fitness values of two dynamic sub-swarms. When the fitness values of the particles are worse than the average, the inertia weight is adjusted by the introduced dynamic piecewise linear chaotic map which can make the local-optima...
Two new methods are introduced to modify the velocity in particle swarm optimization cooperatively: when the fitness values of some particles are worse than the average, the dynamic Zaslavskii chaotic map is devised to modify the velocity, which can make particles break away from the local optima and search global optima dynamically in very complex environments. On the contrary, when the fitness values...
To solve the premature convergence problem of particle swarm optimization, two novel methods are introduced to adjust the inertia weight in parallel according to different fitness values of two dynamic sub-swarms. When fitness values are better than or equal to the average, two types of dynamic nonlinear equations are proposed to adjust the inertia weight in a continuous convex area which can retain...
As the extension of the least significant bits (LSB) steganographic algorithm, steganographic algorithm embedding in two least-significant bits (Two-LSBs for short) has some characteristics, such as visual imperceptibility, higher capacity and easy realization. A new steganalysis method is introduced to detect the existence of hidden message that are randomly embedded in LSB and the second significant...
According to actual circumstance of Han Iron and Steel Company CSP, a three-dimensional mathematical model of fluid flow in the mould has been developed. The process of fluid flow is simulated in aid of fluid simulation software FLUENT, when we use two kinds of SEN separately in cast. The fluid flow in the mould is simulated at the difference of technical parameters (flow-guiding slot angle and submerge...
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