In nuclear reactor design analysis, Monte Carlo (MC) programs are widely used for simulation calculations of particle transport. Traditionally, MC program input files are constructed by manual creation, but with the i...
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This paper proposed a novel video Shot Clustering algorithm using spectral method by joint model in g of inter and intra shot. Gauss Mixture Model (GMM) is used for probabilistic space-time modeling of intra-shot pixe...
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ISBN:
(纸本)0780393317
This paper proposed a novel video Shot Clustering algorithm using spectral method by joint model in g of inter and intra shot. Gauss Mixture Model (GMM) is used for probabilistic space-time modeling of intra-shot pixels. The spectral clustering method is applied on the GMM parameters. The problem of automatic model selection is currently an open issue for spectral method. Here we propose a novel automatic model selection based on joint inter-intra model optimization to achieve the global optimization in both model parameters and cluster numbers. We compare the proposed method with the conventional spectral method for sports video Clustering. The simulation results show more accuracy oil how many clusters and clustering, results.
Due to the large computation quantity of laser propagation simulation in complicated laser systems, the traditional serial simulation cannot fulfill the requirement. In this paper, the laser propagation algorithms of ...
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ISBN:
(纸本)9781510835429
Due to the large computation quantity of laser propagation simulation in complicated laser systems, the traditional serial simulation cannot fulfill the requirement. In this paper, the laser propagation algorithms of coherent light source and noncoherent light source were introduced, two parallel computing modes(parallelization among multi beams and parallelization in one noncoherent beam) were proposed, and a type of data allocation algorithm for load balancing was designed. These were all implemented in Easy Laser which is the component-based laser system simulation software built by us. It has the abilities of fast building parallel simulation programs and can reduce the difficulty to develop parallel programs. In the final, some performance tests for parallel computing were performed on a typical laser propagation simulation model. The test results indicate that the applying of the parallel algorithms can effectively take advantage of the hardware resources and reduce the time consuming.
The development of communications technology is overgrowing, making disseminating information so fast, widespread, and massive. A network of communication systems starting from the first generation to the current sixt...
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Accurate modeling of communication is a necessary part of system level design for real-time safety-critical applications. For efficient prediction of a system's performance, Transaction Level modeling (TLM) is oft...
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State-space modeling method for both. hard- and soft-switching PWM DC/DC converters is discussed and a MATLAB/Simulink model to implement this method is proposed in this paper. Due to direct adoption of state-space eq...
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ISBN:
(纸本)7560518699
State-space modeling method for both. hard- and soft-switching PWM DC/DC converters is discussed and a MATLAB/Simulink model to implement this method is proposed in this paper. Due to direct adoption of state-space equations and compact structure established with Simulink, the proposed model shows high reliability and more effective performance and it is particularly suitable for steady-state analysis of soft-switching PWM DC/DC converters. An example of transient process simulation for a hard-switching converter and another example of steady-state simulation for a soft-switching converter are presented to verify and highlight the features of the proposed model, with emphasis upon the latter.
The Ground Systems (GS) business unit of BAE Systems Inc. develops and manufactures major ground combat vehicles for military. Because the development of ground-based combat vehicles is a complex process, it requires ...
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ISBN:
(纸本)9780791849019
The Ground Systems (GS) business unit of BAE Systems Inc. develops and manufactures major ground combat vehicles for military. Because the development of ground-based combat vehicles is a complex process, it requires the coordinated effort of multiple engineering disciplines that include human factor engineering (HFE), product design, as well as modeling and simulation (M&S), to perform design analysis and to predict vehicle performance. In order to increase engineering efficiency and to reduce product development costs, GS has developed a virtual prototyping technology. Using this technology, it enables GS to perform vehicle design and requirement validation in a virtual environment prior to expensive and time consuming hardware prototyping. This technology also enables GS customers to be more involved in the product development cycle and makes the product development process more customer-centric. The development of this virtual environment requires integration of various technologies, including multibody dynamics, 3D computer graphics, networking, modeling and simulation, and the human-machine interface design. This paper describes how multibody system simulations are used in this virtual environment to support GS vehicle design in the areas of crew visibility studies, crew station design, vehicle interference checking, and electrical power management simulation.
The exited popular ways of evacuation simulation can't satisfy us in the computational efficiency and the calculation accuracy at the same time. In order to get acceptable efficiency and accuracy, we applied the r...
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This paper adopts a new method, the parameters of commercial optically-pumped cesium beam tube (OPCBT) are simulated by computer. We focus on flow and distribution of cesium atoms ejected from the cesium oven of OPCBT...
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ISBN:
(纸本)9781728164304
This paper adopts a new method, the parameters of commercial optically-pumped cesium beam tube (OPCBT) are simulated by computer. We focus on flow and distribution of cesium atoms ejected from the cesium oven of OPCBT, point out the quantitative relationship among the oven temperature, the amount of cesium atoms and the life of cesium beam tube, which provides a theoretical basis for the design of OPCBT structure. At the same time, 3D modeling is carried out, the C-field distribution and microwave field distribution are simulated by computer, which is helpful to understand the relevant parameters intuitively.
Feed servo system often adopts the CNC system with the digital controller as the core. In such a computer control system, it involves both continuous signal processing and digital signal *** numerical control machine ...
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