地形的

The plane coordinate of Grid point is implicit in row and column. Owing to the superiority of Grid in storage、management and convenient for use, it has became a kind of extensively used data structure.

由于规则格网数字高程模型在存储、管理和便于使用方面的优越性，使其成为广泛使用的一种数据结构，但缺点是不能准确地表示地形的结构，在格网大小固定的情况下，无法表示地形的细部。

In this paper, some techniques in Virtual Reality, such as LOD Technique of 3-dimension terrain, frustum culling of 3-dimension terrain, levels of detail model, particles, dynamic texture and bump texture, were deeply researched, and some algorithms and methods are proposed by author. At the same time, some original problems, for example the analysis of rooms irradiation, the alarm of emergencies, quick drawing performed by display card and frustum-culling of models, are also involved in the research.

本课题对虚拟现实中的一些技术如：地形LOD技术、地形的视域裁减技术、多层次细节模型、粒子系统、动态纹理和凹凸纹理等进行了较深入的研究，提出了一些独特的算法和解决方案，并且讨论了建筑物房间的着光分析、绘制场景的硬件加速和景物的视见体裁减等一些较新颖的问题。

Based on the polynomial fitting of power function, FFT of sinusoidal function and 1-level decomposition of Daubechies wavelet, the simulation shows that the approximation of DT and the gradient depend on the width of horizontal distance spectrum.

文章基于幂级数多项式拟合、三角函数的FFT 和一级Daubechies 小波分解的理论分析以及数字地形的数值仿真，研究了近似地形的精确度与坡度的确定性因素。

This is a good learning exaggerated topography of the resources inside the exaggerated terrain on the various...

这是一套很好的学习地形渲染的资源，里面讲述了渲染地形的各种技术，并且里面的代码都可以编译通过，效果也很棒！

According to the mountain geography, the design use the method of " multiple cancrizans layers " to deal with the horizontal gap, use the enclosing layout to make a big scenery yard in center that make most people in community can enjoy the good sight with the least disturbance, make the transportation, view environment, the flow of people and cars arranged reasonable .

与现场山地地形的结合，以&层层退台&式的设计法处理地形高差，采用建筑围合式布局，以形成中心大尺度景观庭院，使小区主要住宅享有都有较好的景观，令整个小区的交通、景观环境、人流车流等均有较合理的布局，各单体建筑均具较好独立性，各栋建筑之间视线干扰最小化。

One charactistics of the visualization system is to control the revelation of the picture. The system has formed shift, circumrotation and zoom kinds so that the user can exactly control the view revelation.

本文编制了一个能读取多种基于Grid地形网格数据的程序接口，通过本接口程序能很快的实现相关地形的显示，本文的接口程序具有通用性。

This method improves the computational accuracy, embodies the precipitation changes with topographty and the distributive incontinuity of precipitation, and solves the problem of the precision of the spatial interpolation of precipitation under complicated topographty condition.

该方法提高了计算的准确性，体现了降水随地形的变化以及在空间分布上的不连续性，有效解决了复杂地形条件下降水空间插值精度不高的问题。

To study the orographic uplifting effect upon the rainstorm and the structure of typhoon Saomai (0608) during the landfall, a set of orographic sensitive experiments are further carried out by changing the terrain altitude within the selected area.

为研究&桑美&登陆期间地形的抬升作用对其降水及结构的影响，通过改变特定区域内的地形高度设计了一组敏感性试验。

Although Taipei and Taichung are both basin landforms, the distribution of the heat island in Taichung is centered and distinct, while that of Taipei is large and of a wide variety because of its high development and urbanization It is also clear from the results that in urban areas, large greened areas or parks play a key role in reducing temperatures.

海岸地形的都会区，都市热岛现象受到海陆气候极大的影响，使得白天热岛中心偏向内陆，晚上热岛中心则偏向海边。虽然台中与台北同属盆地地形，但台北都会区因具有大范围、高度发展与复杂的商业、人为活动，而使得其都市热岛中心分布不像台中集中与明显。

The methods for the recovery of gravity filed from satellite altimetry are summarized and studied and the geoid and gravity anomaly grided in 2.5′×2.5′ size over china are recovered from multi-satellite altimetry data. Two methods are used to recover gravity.

6总结并研究了由测高数据恢复海洋重力场以及分离海面地形的方法；利用多代卫星测高资料，以测高轨迹海面高剖面梯度采样为基础数据，分别由垂线偏差法和最小二乘配置法反演了2.5′×2.5′中国海域的重力异常和大地水准面差距；然后采用移去-恢复由高斯滤波方法从平均海面高中分离出15′×15′中国海域的动力海面地形。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。