Method - 资源检索 - 将博数字资源平台

关键词：ground anchor　　internal force character　　non-support cable hoisting method　　system of integrated construction of cable erection bent tower fastening

本文以南宁大桥的扣索地锚和缆索地锚为研究对象,研究了扣索地锚和缆索地锚的内力性状.采用有限元计算软件ANSYS中的solid45和beam44对南宁大桥扣索地锚和缆索地锚的实际情况进行模拟,分析和比较在不同工况条件下扣索地锚和缆索地锚的受力状况.结果表明:①地锚分别采用实体单元与梁单元模型,其计算结果基本相同;②承台顶部的配重对结构桩体的轴向力影响相对较大,达到17％,但对弯矩的影响都很小,效应都小于1％；③结构自身具有较好的抗拔性能.

Differential Evolution Algorithm for Inversion of Rayleigh Wave Dispersion Curves

Rayleigh waves have been used increasingly as an appealing tool to obtain near-surface shear(S)-wave velocity structures.As a geophysical method,inversion of Rayleigh wave dispersion curves has multip

用于二维无粘跨音速流计算的隐式TVD有限体积法（英文）

关键词：TVD有限体积法　　跨音速流计算　　relaxation　　Gauss-Seidel迭代　　北京航空学院　　英文　　method　　线性方程组　　隐式　　Euler方程组

本文结合Harten的TVD(Total variation diminishing)概念和有限体公式建立一种求解守恒型Euler方程组的有效方法,采用通量分裂的迎风格式对方程组的隐式算子部分离散化,得到系数矩阵是主对角线占优的线性方程组,采用线Gauss-Seidel迭代推进法求解,提高了数值收敛速度,给出了二维跨音速内流的计算结果。

Multifractality in China copper futures market

We use MFDFA method in this study to examine the multifractality of China copper futures market from 2006 to 2012 for the Shanghai Futures Exchange (SFE). Results show that China copper futures market

Derivation of quantum work equalities using a quantum Feynman-Kac formula

关键词：Nonequilibrium statistics　　Fluctuation relations　　quantum physics　　Feynman‐Kac formula

On the basis of a quantum mechanical analog of the famous Feynman‐Kac formula,we present a method to derive nonequilibrium work equalities for isolated quantum systems,which include the Jarzynski equality and Bochkov‐Kuzovlev equality.

GPU Based Burning Process Simulation

关键词：

we present a method of simulating the process of burning phenomena on generic polyhedral objects. By mapping the object’s surface to a 2D space, the fire front expansion can be calculated efficiently

Transductive Support Vector Machine for Personal Inboxes Spam Categorization

A method based on transductive support vector machine for personalized spam filtering is proposed.Both labeled emails from the public available source and unlabeled emails in individual inbox are used as the input of the classifier.The problem of the generalizing the training data to the test data in SVM is solved.It provides a way to combine the ability of generalization and adaptation for the spam categorization.The model and parameter selection is stated in order to improve the performance of TSVM.The experiments show that the results of filtering with TSVM are better than the SVM.

Optimization of Stochastic VRPTW Using Simulation Based on Arena

Because of the inherent complex of stochastic VRP, analytical method, which uses opportunity constraint to express the randomness, can not solve the problem properly without neglecting some factors, like wait time. In this paper, we propose a discrete simulation method, which uses the simulation software Arena. Not only can the software simulate the random VRP process, but also it provides us the programming interface with VB, by which we can employ the tabu search optimization algorithm to obtain a satisfied result. At last, computer experiment shows that the simulation method is valid and efficient.

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