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Comprehensive Evaluation Method of Urban Remnant Natural Area: A Case study of shanghai, china

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Journal of shanghai Jiaotong university(Science) 2008年第5期13卷 589-594页

作者：车生泉王云宫宾 College of Agriculture and Biology Shanghai Jiaotong University

Urban remnant natural area (URNA), located in the urban or suburb area, less disturbed by dwellers in the process of urbanization, is an important part of complex urban ecosystem and provides significant opportunity for urban sustainable development. Despite that there is a considerable amount of scientific researches on the urban nature in urban and suburb area, the comprehensive research of URNA is still rare. After analyzing the concept and value of URNA, this paper presented a methodology for comprehensive evaluation of URNA by adopting methods of document analysis, prior-selection process, analytic hierarchy process and vector resemblance-degree. As a result, the comprehensive evaluation index of URNA includes target level A, rule level B(ecological environment value, ecological recreation value, social culture value, scientific research value), index level C( diversity,singularity,nature,area,stability,recreation,landscape element,aesthetics,history,scientific), and index level D(20 items). Each index weight of comprehensive evaluation system of URNA of shanghai was confirmed finally.

关键词： urban remnant natural area (URNA) urban nature preservation ecological planning compre- hensive evaluation

7th CIIE likely to prove solid growth platform for many companies

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china Textile 2024年第4期 20-21页

作者： china Daily

The robust demand of the Chinese market and the improving business environment in the country make china a big growth opportunity for companies wishing to further expand their operations,said corporates that have registered to participate at this year's china International Import *** 7th edition of the annual CIIE,to be held in shanghai from Nov 5 to 10,started its 100-day countdown on Saturday.

关键词： companies likely operations

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Optimization of china Unicom shanghai Branch's GSM Network

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ZTE Communications 2004年第1期2卷 37-39页

作者： Liu Tong (Mobile Communication Service Division,china Unicem shanghai Branch,shanghai 200070,china)

1 Purpose of NetworkOptimizationThe purpose of network optimization is tofind the major factors that affect the qualityof network,and ultimately achieve betternetwork *** can improvenetwork quality,bringing a higher degree ofcustomers’satisfaction and enhancing anoperator’s *** optimization and routinemaintenance are tightly correlated with *** optimization is implemented alongwith daily *** construction isbased on the *** planning andconstruction provide a foundation and platformfor network optimization.

关键词： GSM down

A MONOTONE COMPACT IMPLICIT SCHEME FOR NONLINEAR REACTION-DIFFUSION EQUATIONS

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Journal of Computational Mathematics 2008年第2期26卷 123-148页

作者： Yuanming Wang Department of Mathematics,East china Normal University,shanghai 200241,china Division of Computational Science,E-Institute of shanghai Universities,shanghai Normal Benyu Guo Department of Mathematics,shanghai Normal University,shanghai 200234,china Division of Computational Science,E-Institute of shanghai Universities,shanghai,china Department of Mathematics East China Normal University Shanghai 200241 China Division of Computational Science E-Institute of Shanghai Universities Shanghai Normal University Shanghai 200234 China Department of Mathematics Shanghai Normal University Shanghai 200234 China Division of Computational Science E-Institute of Shanghai Universities Shanghai China

A monotone compact implicit finite difference scheme with fourth-order accuracy in space and second-order in time is proposed for solving nonlinear reaction-diffusion equations. An accelerated monotone iterative method for the resulting discrete problem is presented. The sequence of iteration converges monotonically to the unique solution of the discrete problem, and the convergence rate is either quadratic or nearly quadratic, depending on the property of the nonlinear reaction. The numerical results illustrate the high accuracy of the proposed scheme and the rapid convergence rate *** iteration.

关键词： Nonlinear reaction-diffusion equation Monotone compact implicit scheme High accuracy Monotone iteration Rapid convergence rate.

THE LARGE TIME CONVERGENCE OF SPECTRAL METHOD FOR GENERALIZED KURAMOTO-SIVASHINSKY EQUATION (Ⅱ)

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Journal of Computational Mathematics 1998年第3期16卷 203-212页

作者： Xin-ming Xiang (shanghai Normal University, shanghai 200234, china) 上海师范大学上海

In this paper, we study fully discrete spectral method and long time behavior of solution of generalized Kuramoto-Sivashinsky equation with periodic initial condition. We prove that the large time error estimation for fully discrete solution of spectral method. We prove the existence of approximate attractors AN, ANk respectively and d(AN, A) → 0, d(ANk, A) → 0.

关键词： Kuramoto- Sivashinsky equation,large time convergence Approximate attractor Upper semicontinuity of attractors.

An extended stochastic response surface method for random field problems

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Acta Mechanica Sinica 2007年第4期23卷 445-450页

作者： Shuping Huang Xinjian Kou shanghai Jiaotong University,shanghai 200240,china shanghai Jiaotong University Shanghai 200240 China

An efficient and accurate uncertainty propagation methodology for mechanics problems with random fields is developed in this paper. This methodology is based on the stochastic response surface method （SRSM） which has been previously proposed for problems dealing with random variables only. This paper extends SRSM to problems involving random fields or random processes fields. The favorable property of SRSM lies in that the deterministic computational model can be treated as a black box, as in the case of commercial finite element codes. Numerical examples are used to highlight the features of this technique and to demonstrate the accuracy and efficiency of the proposed method. A comparison with Monte Carlo simulation shows that the proposed method can achieve numerical results close to those from Monte Carlo simulation while dramatically reducing the number of deterministic finite element runs.

关键词： Stochastic response surface Karhunen-Loeve expansion Polynomial chaos Random field Stochastic finite elements

Explicit Analytical Solutions for the Shearingand Radial Stresses in Curved Beams

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Communications in Nonlinear Science and Numerical Simulation 1999年第2期4卷 151-156页

作者： Aiming YU+ Xiangrong LI+++ (Tongji University, shanghai 200092, china)++ (shanghai University, shanghai 200072, china) Tongji University Shanghai 200092 China shanghai University Shanghai 200072 China

The shearing stresses in curved beams can be solved explicitly from anintegral equation, which is obtained by differentiation & integral manipulations. Twonovel formulae for shearing & radial stresses are also presented in the paper. The resultsof an example reveal that the shearing & radial stresses arrive at their maximum valuesslightly below the centroid of the section.

关键词： curved beam shearing stress radial stress integral equation

CURVILINEAR PATHS AND TRUST REGION METHODS WITH NONMONOTONIC BACK TRACKING TECHNIQUE FOR UNCONSTRAINED OPTIMIZATION

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Journal of Computational Mathematics 2001年第3期19卷 241-258页

作者： De-tong Zhu (Department of Mathematics, shanghai Normal University, shanghai 200234, china) 上海师范大学上海 200234

Focuses on a study which examined the modification of type approximate trust region methods via two curvilinear paths for unconstrained optimization. Properties of the curvilinear paths; Description of a method which combines line search technique with an approximate trust region algorithm; Information on the convergence analysis; Details on the numerical experiments.

关键词： curvilinear paths trust region methods nonmonotonic technique unconstrained optimization

A MODIFIED LEVENBERG-MARQUARDT ALGORITHM FOR SINGULAR SYSTEM OF NONLINEAR EQUATIONS

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Journal of Computational Mathematics 2003年第5期21卷 625-636页

作者： Jin-yan Fan (Department of Mathematics, shanghai Jiaotong University, shanghai 200240, china) Department of Mathematics Shanghai Jiaotong University 上海 200240

Based on the work of paper [1], we propose a modified Levenberg-Marquardt algoithm for solving singular system of nonlinear equations F(x) = 0, where F(x) : Rn - Rn is continuously differentiable and F'(x) is Lipschitz continuous. The algorithm is equivalent to a trust region algorithm in some sense, and the global convergence result is given. The sequence generated by the algorithm converges to the solution quadratically, if ||F(x)||2 provides a local error bound for the system of nonlinear equations. Numerical results show that the algorithm performs well.

关键词： Singular nonlinear equations Levenberg-Marquardt method Trust region al- gorithm Quadratic convergence.