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Planar and quadric objects are often used in computer graphics. They can easily be modeled and rendered because of their simple shapes, and so many objects are composed of them in our daily life.

镜面反射和折射场景的真实感图形绘制一直是计算机图形学领域具有挑战性的研究课题之一。

In order to investigate the relationship of solubility between vanadium and the other co-existing ion in soil. The phase equilibria of the quinary systemNaVO_3 + KVO_3 + NaH_2PO_4 + KH_2PO_4 +(NH_2)_2CO + H_2O and its five quaternary sub-systems were studied at 298K with isothermal dissoluble method. According to the reference, all these systems are not reported yet. The solubilities and the physico-chemical properties such as density, conductivity, pH value and refractive index of the equilibrium solutions were determined. Based on the determined values, the solubility stereo-diagram and projected-diagram( saturated with KVO3), projected-diagramsaturated with (NH_2_2CO, and water content diagram of the quinary system, isothermal solubility diagrams of the quaternary sub-systems, and the physico-chemical properties-composition diagrams of the equilibrium solutions were plotted.

为探明土壤中钒的溶解性同土壤中主要共存离子间的关系，本论文采用等温溶解平衡法研究了文献中还未见报道的五元体系NaVO_3+KVO_3+NaH_2PO_4+KH_2PO_4+(NH_2)_2CO+H_2O及其五个四元子体系298K相平衡关系，测定了这些体系298K时各组分的溶解度及平衡液相的密度、电导率、pH值和折光率等物化性质，并绘制了五元体系溶解度空间立体图，以KVO_3为饱和的投影图，以(NH_2)_2CO为饱和的投影图、水图及四元子体系的溶解度等温图、水图和平衡液相物化性质一组成图。

Between Jan 2000 and Jan 2005, 443 patients with stage II colon cancer who had received radical surgery in cancer center of Sun Yat-sen university were retrospectively analyzed.

对443例行结直肠癌根治术的Ⅱ期结直肠癌患者的临床病理资料进行统计，用Kaplan-Meier法计算生存率、绘制生存曲线。

In this tutorial I will show you how to create flock of fish and how to control their random motion, before going to start this tutorial I assume that you should have some thing in your scene any object it dose not matter, what object is it can be fish, bird, robot, car any thing you have but I will use fish in this tutorial, when you working with you should have any drawn in scene, like mine below.

在本教程中我将告诉你如何创建鱼类的羊群，如何控制自己的随机运动，即将开始前，本教程中，我假设你应该有一些东西在你的现场任何物件它剂量不要紧，什么对象是可以是鱼，鸟，机器人，汽车的任何一点你，但我会在本教程中使用，当你与，你应该有任何绘制场景像我下面，鱼。

Many researchers have devoted their work to the development of modal analysis extraction techniques in order to obtain more reliable identification of the modal parameters. There are many damping identification methods, but each one has different merit and defect. In order to find which one is the most reliable method with respect to certain characteristics, this thesis focus on how to identify structure's damping in time domain. The following works have been done in this thesis: 1. Investigate four modal analysis methods——the LSCE Method, the Ibrahim Time Domain Method, the Time Domain Collectivity Modal Parameter Method, the Rational Fraction Polynomial Method and improve on the ITD Method in arithmetic.

本文主要做了如下工作： 1、集中研究了四种常用的模态识别方法，即最小二乘复指数法、Ibrahim时域法、时域总体模态参数辨识法及有理分式多项式法，并对ITD法在算法上进行了一定的改进； 2、建立结构动力模型，利用这四种方法在具体条件下识别结构的阻尼，并绘制相应的图； 3、讨论不同的情况下，不同的识别方法对阻尼识别精确性的影响； 4、基于业已明确的阻尼识别的精确性，根据研究的需要，指出在实际的识别过程中，如何选择最佳的识别方法以及识别过程中需要注意的问题； 5、选择最为精确的阻尼识别方法，以导师李书进教授在日本京都大学防灾研究所强震反应实验室所做的一足尺木制结构房屋的动力测试实验为实测模型，识别其阻尼； 6、在本文的最后，尽作者所知，提出了一些需要改进的地方，并对未来的研究方向给出了作者的建议。

In order to characterize the spatial characteristics at different scale, different theoretical model coefficient we defined to create the Kriging map and the rational number of sampling impendent from each other at different spatial scale.

变异函数结构分析显示，土壤机械组成的空间变异在各方向上具有不同变率，但均可通过线性变换而转换为各向同性的统一结构，属于几何各向异性结构；不同观测尺度上有着不同的空间结构特征，对不同空间结构的区域化变量确定了不同的理论模型参数，并绘制克立格图，给出不同观测尺度下满足独立取样的合理取样数目。

Combining Rayleigh quotient of the stiffness matrix, the paper defined the index K used to estimate the mechanism stiffness, and plotted spatial graph of the stiffness performance.

结合刚度矩阵的瑞利商定义了刚度判定指标K，绘制出刚度性能空间图，进一步研究了操作端方向的刚度特性。

Combining Rayleigh quotient of the stiffnesss matrix,the index used to estimate the manipulator continuous stiffness was defined,and spatial graphs of the stiffness performance were plotted.

文中还结合刚度矩阵瑞利商定义了连续刚度判定指标，绘制了刚度性能空间图，进一步探讨了该机构的方向刚度特性，为平面并联弹性铰机器人机构刚度的分析提供了一种新颖通用的方法。

Simulation of natural scenery is a hot research branch in computer graphics,which is widely applied to be television advertising,real-time rendering,3D animation and games, upholster design,virtual scene and so on. It plays an important role in the information society with its unique charm.

自然景物的模拟一直是计算机图形学中的热门研究课题，其应用范围很广，包括影视广告、实时绘制、3D游戏、装演设计、虚拟场景等各种领域，以其独特的魅力在信息化社会中占据着重要的位置。

The challenges and future works of fluid animation may include the fluid animation control,real-time rendering,detail exhibiting and so on.

流体动画的挑战和发展方向在于：流体动画控制、实时绘制、细节表现。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。