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Antiplane responses of a scalene triangular hill or structure, an isosceles triangular hill or structure, an isosceles triangular hill with a subsurface cavity to incident SH waves are studied in this paper based on methods of wave function expanding, complex function, moving coordinates and by employing idea of assistant function.

本文在"分区"和辅助函数思想的指导下,综合利用了波函数展开、复变函数、移动坐标三种方法,研究了等腰三角形凸起地形和坝体结构、非等腰三角形凸起地形和坝体结构、浅埋圆孔附近等腰三角形凸起地形等三类问题对SH波的散射。

Digital Terrain Model is digital expression of geologic surface attributively information, it is also digital description with spatial location and terrain properties features.

数字地形模型是地形表面形态属性信息的数字表达,是带有空间位置特征和地形属性特征的数字描述。

Then we can research the relationship between topography-isostatsy compensation gravity and geoid and order and degree of spherical harmonic series, and discuss the characters of topography-isostatsy compensation gravity and geoid.

由此我们可以研究地形—均衡补偿重力、大地水准面异常与球谐级数阶次的关系,以及不同波长地形荷载与岩石圈挠曲补偿的关系,探讨地形—均衡补偿重力、大地水准面的频谱特性。

The large altitude difference of the hypsography, the fragmental topography, the difference of exposure and the valley cause the difference of the part climate which make the orographic rain , the topography wind and the temperature inversion.

由于地势高差悬殊、地形破碎和坡向、谷向的不同,常引起局部气候差异,多地形雨、地形风和逆温现象,形成不同的小气候。

The approach, based on the physical model of terrain contour matching, defines a probability vector to describe the local terrain uniqueness and thus provides a way to measure terrain uniqueness via entropy.

该方法从地形匹配的物理模型出发,定义了描述局部地形独特性的一个概率向量,在此基础上,给出了地形独特性的熵度量方法。

A technique of massive scale data management and attemperation based on viewpoint. This algorithm effectively changes massive scale terrain into large scale ones to handle. Utilising the continuity of the viewpoint movement and the relativity of fore-and-aft frames, it manages and attempers the terrain data leading to data decrease in a large range. This algorithm solves the problem of the rendering rate, and realizes a rapid real-time ramble in massive scale terrain scenes.

提出了一种基于视点的场景数据管理调度技术,有效地将海量地形转换为大规模地形进行处理,并利用视点运动的连续性和前后帧的相关性,管理调度地形数据,大幅度地降低了数据量,解决了绘制速度的问题,实现了海量地形场景的实时快速漫游。

The feasibility of the proposed algorithm is tested by using some test data with different characteristics of topography. The algorithm is proved to be effective and practicable in most test cases, but in some cases some ground points in the rough terrain may be over-filtered.

经由实际资料测试,本演算法对多数地形状况能有效滤除非地面点,获得良好的过滤结果,唯在地形断线处以及地形突然隆起或是下陷处,可能会将地面点过度滤除。

It is generally thought that the dynamic subsidence is associated with supercontinental assembly and dispersal and subducting slabs.

动力地形一般认为具有两种成因,一种为与超大陆集聚和分散有关的动力地形,另一种为与大洋板片俯冲有关的动力地形。

In this paper, the fundamental theory and methods of terrain modeling, includeregular square grid and triangulated irregular netWork, is studied.

本文研究了基于等高线的地形模型建模的基本理论与方法,包括规则格网地形模型、不规则三角网地形模型的建模。

This method can effectively reduce the numbers of artificial dams and local minima.The algorithm has been implemented in five different terrains,showing that the method can effectively reduce the numbers of the local minima.So,it is more realistic for generating terrains model with higher order Delaunay triangulations.

实验结果表明,高阶Delaunay三角网能够有效地减少地形中局部极小的数量,因此,采用高阶Delaunay三角网建立的地形模型更接近于实际地形。

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