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基于高程熵的大规模地形建模方法 被引量:4
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作者 张红 陆谊 《计算机工程与设计》 CSCD 北大核心 2006年第24期4644-4647,共4页
针对现在图形数据量越来越大,现有的硬件水平对大规模图形数据处理的限制,提出了一种基于高程熵的大规模地形建模方法,使得大规模地形数据的处理效率得到显著的提高。首先介绍了传统的地形建模方法,然后从“建模速度”和“建模精度”两... 针对现在图形数据量越来越大,现有的硬件水平对大规模图形数据处理的限制,提出了一种基于高程熵的大规模地形建模方法,使得大规模地形数据的处理效率得到显著的提高。首先介绍了传统的地形建模方法,然后从“建模速度”和“建模精度”两个方面入手,论述了大规模地形的建模方法和思路。最后通过几个实际的例子对本文的建模方法进行了验证,证明了本文建模方法的正确性和有效性。 展开更多
关键词 高程熵 建模速度 建模精度 规则格网地形模型 不规则三角网地形模型
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高程熵综合地形匹配算法的仿真研究 被引量:5
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作者 李爱军 白焱 《计算机仿真》 CSCD 2004年第8期135-137,128,共4页
高程熵综合匹配算法通过地形分块、连续搜索、动态门限、粗配、精配结合实现地形匹配定位功能。对于地形较复杂区域,有其独特的优势。使用MATLAB软件进行仿真试验,研究探讨了该算法的技术要点,给出了仿真用地形数据的产生方法和仿真的... 高程熵综合匹配算法通过地形分块、连续搜索、动态门限、粗配、精配结合实现地形匹配定位功能。对于地形较复杂区域,有其独特的优势。使用MATLAB软件进行仿真试验,研究探讨了该算法的技术要点,给出了仿真用地形数据的产生方法和仿真的基本步骤,并对结果进行了分析。结果表明该算法能达到较高的性能要求。 展开更多
关键词 高程熵 地形匹配 仿真
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基于高程熵的综合匹配算法在地形匹配上的应用 被引量:2
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作者 白焱 王伟 +1 位作者 李爱军 田晓燕 《测控技术》 CSCD 2004年第3期69-70,73,共3页
提出了一种基于高程熵的综合匹配算法 ,该算法通过地形分块、连续搜索、动态门限、粗配、精配结合实现地形匹配定位功能。对于地形较复杂区域 ,高程熵匹配算法有其独特的优势。用MATLAB仿真试验表明 ,该算法能达到较高的性能要求。
关键词 地形匹配 高程熵 高程匹配算法
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An entropy-based multi-criterion group decision analysis method of selecting the optimum weak-subgrade treatment
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作者 罗君君 《Journal of Chongqing University》 CAS 2008年第3期191-197,共7页
Proper treatment of weak subgrade soil is very important to building a highway of good quality. We proposed an entropy-based multi-criterion group decision analysis method for a group of experts to evaluate alternativ... Proper treatment of weak subgrade soil is very important to building a highway of good quality. We proposed an entropy-based multi-criterion group decision analysis method for a group of experts to evaluate alternatives of weak subgrade treatment, with an aim to select the optimum technique which is technically, economically and socially viable. We used fuzzy theory to analyze multiple experts' evaluation on various factors of each alterative treatment. Different experts' evaluations are integrated by the group eigenvalue method. An entropy weight is introduced to minimize the negative influences of subjective human factors of experts. The optimum alternative is identified with ideal point diseriminant analysis to calculate the distance of each alternative to the ideal point and prioritize all alternatives according to their distances. A case study on a section of the Shiman Expressway verified that the proposed method can give a rational decision on the optimum method of weak subgrade treatment. 展开更多
关键词 highway engineering weak subgrade treatment decision making entropy weight group eigenvalue method
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A Derivation of the Entropy-Based Relativistic Smoothed Particle Hydrodynamics by Variational Principle
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作者 Philipe Mota Wei-Xian Chen Wei-Liang Qian 《Communications in Theoretical Physics》 SCIE CAS CSCD 2017年第9期382-386,共5页
In this work, a second order smoothed particle hydrodynamics is derived for the study of relativistic heavy ion collisions. The hydrodynamical equation of motion is formulated in terms of the variational principle. In... In this work, a second order smoothed particle hydrodynamics is derived for the study of relativistic heavy ion collisions. The hydrodynamical equation of motion is formulated in terms of the variational principle. In order to describe the fluid of high energy density but of low baryon density, the entropy is taken as the base quantity for the interpolation. The smoothed particle hydrodynamics algorithm employed in this study is of the second order, which guarantees better particle consistency. Furthermore, it is shown that the variational principle preserves the translational invariance of the system, and therefore improves the accuracy of the method. A brief discussion on the potential implications of the model in heavy ion physics as well as in general relativity are also presented. 展开更多
关键词 HYDRODYNAMICS SPH method variational principle
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