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Science china Earth Sciences 2011年第8期54卷 1177-1188页

作者： ZHANG Tao 1,2,3,4,LIN Jian 5 & GAO JinYao 3,4 1 institute of Geodesy and Geophysics,Chinese Academy of Sciences,wuhan 430077,china 2 Graduate University of Chinese Academy of Sciences,Beijing 100049,china 3 The Second institute of Oceanography,State Oceanic Administrator,Hangzhou 310012,china 4 Key Laboratory of Submarine Geosciences,State Oceanic Administrator,Hangzhou 310012,china 5 department of Geology and Geophysics,Woods Hole Oceanographic Institution,Woods Hole,MA 02543,USA institute of Geodesy and Geophysics Chinese Academy of Sciences Wuhan 430077 China

This study investigates the relationship between the hotspot-ridge interaction and the formation of oceanic plateaus and seamounts in the Southwest Indian *** first calculated the relative distance between the Southwest Indian Ridge (SWIR) and relevant hotspots on the basis of models of plate reconstruction,and then calculated the corresponding excess magmatic anomalies of the hotspots on the basis of residual bathymetry and Airy *** results reveal that the activities of the Marion hotspot can be divided into three main phases:interaction with the paleo-Rodrigues triple junction (73.6-68.5 Ma),interaction with the SWIR (68.5-42.7 Ma),and intra-plate volcanism (42.7-0 Ma).These three phases correspond to the formation of the eastern,central,and western parts of the Del Cano Rise,*** magnitude and apparent periodicity of the magmatic volume flux of the Marion hotspot appear to be dominated by the hotspot-ridge *** periodicity of the Marion hotspot is about 25 Ma,which is much longer than that of the Hawaii and Iceland hotspots (about 15 Ma).

关键词： Southwest Indian Ocean hotspot-ridge interaction magmatic volume flux oceanic plateaus seamounts

应用PIV进行二维后向台阶流流动特性的研究(2)二维后向台阶流起动流的研究

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水动力学研究与进展（A辑） 2004年第4期19卷 533-539页

作者：齐鄂荣黄明海李炜吴剑张昕李国亚武汉大学水利水电学院湖北武汉430072 长江科学院水力学所湖北武汉430010 中南建筑设计院设备所湖北武汉430071

　利用PIV技术,对二维后向台阶起动流的瞬态速度场进行了观测,得到层流至湍流情况下起动流的一些运动规律。本文分析了流动中起动涡等旋涡的运动和发展特征,分析了起动流过程中再附着点的位置、起动涡等旋涡涡心的位置等的变化规律。

关键词： PIV 后向台阶流起动流旋涡结构

Several Theoretical Problems on the Tonebreaking of Model CW External Water-bag Shock Wave Stonebreaker

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传感器世界 1996年第6期 38-40页

作者： Gu Meilin Lu Shiqing Yangtze river scientific research institute

This article introduces the stonecrushing process and mechanism of the Model CW external water-bag shock wave stonebreaker. It illustrates and analyses the behavior of shock wave theoretically. which can crush the hard tissue and doesn’t wound the soft tissue. Furthermore. this article explains the principle of shock wave forming and focus theory.

关键词： IC In CW Several Theoretical Problems on the Tonebreaking of Model CW External Water-bag Shock Wave Stonebreaker Wave

Mitigation of lake eutrophication:Loosen nitrogen control and focus on phosphorus abatement

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Progress in Natural Science:Materials International 2009年第10期19卷 1445-1451页

作者： Haijun Wang,Hongzhu Wang institute of Hydrobiology,The Chinese Academy of Sciences,wuhan 430072,china institute of Hydrobiology The Chinese Academy of Sciences Wuhan 430072 China

Traditionally,nitrogen control is generally considered an important component of reducing lake eutrophication and cyanobacteria ***,this viewpoint is refuted recently by researchers in china and North *** the present paper,the traditional viewpoint of nitrogen control is pointed out to lack a scientific basis:the N/P hypothesis is just a subjective assumption;bottle bioassay experiments fail to simulate the natural process of nitrogen *** multi-year comparative research in more than 40 Yangtze lakes indicates that phosphorus is the key factor determining phytoplankton growth regardless of nitrogen concentrations and that total phytoplankton biomass is determined by total phosphorus and not by total nitrogen *** results imply that,in the field,nitrogen control will not decrease phytoplankton *** finding is supported by a long-term whole-lake experiment from North *** outcomes can be generalized in terms that a reduction in nitrogen loading may not decrease the biomass of total phy-toplankton as it can stimulate blooms of nitrogen-fixing *** mitigate eutrophication,it is not nitrogen but phosphorus that should be reduced,unless nitrogen concentrations are too high to induce direct toxic impacts on human beings or other ***,details are provided on how to reduce controls on nitrogen and how to mitigate eutrophication.

关键词： Lake eutrophication Cyanobacteria blooms Lake restoration

research ON THE EFFECTS OF SAND MINING AT river COURSE BY 2D CURVILINEAR FLOW AND SEDIMENT MATHEMATICAL MODEL

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RESEARCH ON THE EFFECTS OF SAND MINING AT RIVER COURSE BY 2D...

A new grid-associated algorithm in the distributed hydrological model simulations

第二十届全国水动力学研讨会

作者： XIE~* Zuo-tao~(1,2) (1.department of Hydraulic Engineering,Tsinghua University,Beijing 100084.china 2.changjiang institute of survey,planning,design and research,wuhan,430010,china)

＜正＞Based on the finite volume method,2-D horizontal flow and sediment mathematical model in generalized curvilinear coordinate was presented,and non-staggered grids and SIMPLE algorithm were adopted during the establishment of *** model was calibrated by field datum of wuhan reach at the changjiang *** the effects of sand mining at wuhan reach course,including the variation of water level,velocity and re-silt of sediment,were simulated by the established ***,the influences of flood control and river regime induced by sand mining were analyzed in detail,and the results could provide scientific reference for the feasibility of sand mining and the decision-making of mining scale.

关键词： sand mining 2-D horizontal flow and sediment model generalized curvilinear coordinate calibrated sediment re-silt

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Science china(Technological Sciences) 2010年第1期53卷 235-241页

作者： XU Rui1,2,HUANG XiaoXue1,LUO Lin1 & LI ShaoCai3 1 State Key Laboratory of hydraulics and Mountain river Engineering College of Architecture and Environment,Sichuan University,Chengdu 610065,china 2 College of Electronic Engineering,Guilin University of Electronic Technology,Guilin 541004,china 3 College of Life Sciences,Sichuan University,Chengdu 610065,china State Key Laboratory of hydraulics and Mountain river Engineering College of Architecture and Environment Sichuan University College of Electronic Engineering Guilin University of Electronic Technology

This paper presents a new grid-associated algorithm to improve the performance of a D8 algorithm based distributed hydrological model *** algorithm is based on the well known single-flow D8 algorithm of grid *** algorithm allocates calculation priorities according to the distance between the units and the outlet,then carries out the ergodic computations of the hydrological units according to the priority *** the parallelized algorithm,a standard thread-level shared memory system for parallel programming(OpenMP-Open specifications for Multi Processing) was introduced,and the parallel coding was implemented in C lan-guage.A case study showed that the absolute speed-up ratio of the grid-associated algorithm is 1.64 over the original D8 algorithm,and the linear speed-up ratio of the parallel associated algorithm is 2.42 under 4 *** parallel grid-associated algorithm can be applied to a variety of research fields that use the grid method.

关键词： distributed hydrological model grid-association algorithm OpenMP parallel computing

AN　INTEGRATEDC　METHOD　FOR　COMPUTING　COMPUTING　THE　INTERNAL　AND　EXTERNAL　VISCOUS　FLOW　FIELD　AROUND　THE　DUCTED　PROPULSOR　BEHIND　AN　AXISYMMETRIC　BODY

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Journal of Hydrodynamics 1995年第3期7卷 72-83页

作者： Zhou Lian-di Zhao Feng(china Ship scientific research Center, P.O. Box 116, Wuxi 214082, P. R. china) china Ship scientific research Cent Wuxi China

This paper presents an effective method for computing the internal and external viscous flow field around the ducted propulsor behind an axisymmetric they by using a new Navier-Stokes equations solver with primitive variable continuity equation formulation. In the present numerical method, the calculation equation for pressure with well-defined coefficient,which form is similar to the artificial compressibility method, is developed. A semi-staggered grid system is adopted. Not only the advantage of staggered grid system can be retained but the boundary conditions on the inner and outer surface of the duct can be also carried out easily. By using a special grid system and the programming technique for implementing the jump boundary condition on the duct surfaces, the internal and external viscous flow field around the ducted propulsor behind the axisymmetric they may be calculated integrally in an unified numbered grid system. Some configurations are calculated and compared with experimental date and numerical results of other methods. Illustrative calculations are also presented for a stern of axisymmetric body with the backstep fitted a duct to illustrate the capability of the present method. Beside that, the effect of axial distribution of they force is considered and discussed in order to extend the application range of the present method.

关键词： ducted propulsor viscous flow semi-staggered grid

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.

EXPERIMENTAL STUDY OF THE ASYNCHRONOUS MULTISPLITTING RELAXATION METHODS FOR THE LINEAR COMPLEMENTARITY PROBLEMS

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Journal of Computational Mathematics 2002年第6期20卷 561-574页

作者： Zhong-zhi Bai(State Key Laboratory of scientific/Engineering Computing, institute of Computational Mathematicsand scientific/Engineering Computing, Academy of Mathematics and System Sciences, ChineseAcademy of Sciences, Beijing 100080, china) institute of Computational Mathematics and scientific/Engineering Computing Academy of Mathematics and System Sciences Chinese Academy of Sciences State Key Laboratory of Scientific/Engineering ComputingCAS 北京 100080

Presents a study of the numerical behaviors of the relaxed asynchronous multisplitting methods for linear complementarity problems by solving typical problems from practical applications on a real multiprocessor system. Description of the tested problems and computing environment used in the computations; Description of the asynchronous multisplitting unsymmetric accelerated overrelaxation method; Discussion of results.

关键词： linear complementarity problem matrix multisplitting asynchronous iterative methods numerical experiment

Rock Cofferdams Demolition Blasting at Tailrace Tunnel of Hydropower Station

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Rock Cofferdams Demolition Blasting at Tailrace Tunnel of Hy...