地形的

The method reconstitutes the triangles in different multi-resolution transition region and optimizes the quadtree vertex error estimation and geometry smooth transition algorithm with the scheme based on the characteristics of higher distance to ground and bigger downwards angle of visibility in flight simulation. The render speed of computer is enhanced while ensuring the veracity condition of the terrain.

该方法将不同分辨率过渡区域的地形进行重新构网，并针对飞行仿真距离地面较高、下视角较大的特点对四叉树顶点误差估计和几何光滑过渡算法进行优化，在保证地形准确性的范围内提高计算机实时处理速度。

By controlling the frequency and amplitude of Perlin noise and superposing more noise value, we can get diversified terrain with the complex work of manual geometry modeling avoided.

引入Perlin噪声作为地形高度生成器的基本模型，通过控制噪声的幅度和频率以及噪声叠加，可以生成形态各异的地形。

The numerical results shows that the positions oftroughs and ridges in the westerlies are well in agreement with the obser-vation,but there is discrepancy in intensity.

用西藏高原和洛矶山的实际地形作了数值计算，计算结果表明，地形扰动可以解释西风带平均槽脊的位置，但扰动的强度与实况有一些出入。

Seabed mineral resources—cobalt crust comes mainly from rugged terrain of the seamount surface, the track vehicle used for mining cobalt crust should have an excellent barrier properties, mechanical performance and heavy-duty capacity.

海底矿产资源钴结壳主要产于地形崎岖不平的海山表面，用于开采钴结壳的履带式作业车应能稳定地通过复杂地形，具有优良的越障性能、机动性能和重载能力。

Introduces the height finding theory of the continuous wave frequency modulation altimeter and the pulse radar altimeter,analyzes the reason why the two kinds of altimeters were used in complex terrain to cause errors,and also gives out the experiment result that the plane mounted with the two kinds of altimeters flew in complex terrain section occasion.

介绍了调频连续波高度表和脉冲雷达高度表的测高原理，分析了两种体制高度表在复杂地形下使用时产生误差的原因，并且给出了两种高度表在复杂地形剖面场合下的机载试验结果。

The partially over fifty degrees steep, infamous "Banana" of the SW-Ridge, the crevassed zones, the knife edge summit ridge do not qualify for first rate skitouring terrain.

部分峭壁的坡度超过了五十度，西南山脊声名狼籍的＂香蕉＂地形，裂缝区，和刃脊顶峰都不是适合越野滑雪的地形。

Rock land mountain,desert and soil mountain are widely distributed in the middle and upper reaches of Yellow River basin.

黄河黑山峡地区地形复杂，加之裸土、沙漠和岩石光谱的相似性与复杂性，使遥感技术在该地区的应用受到限制，但是由于地形起伏、岩石风化及表面粗糙度等因素的影响，石质山地纹理明显。

Superposition of geographic information of the digital elevation model and maps of landscape genres is weighed to mirror the spatial distribution of the plant communities at different slops, aspects and position.

利用数字化地形模型与景观类型图进行地理信息叠加，以定量化地反映主要群落在不同坡度、坡向以及坡位的空间分布，获得各群落的分布结构，数量化研究地形因素与植被分布的关系。

Through indoor and outdoor experiments, it was proved that the designed 3-D intelligent measurement system for field landscape and Laser leveling aided decision-making support system can work stably. The 3-D intelligent measurement system can achieve an accuracy of 2cm in attitude measurement. The measurement efficiency is two times higher than that of using measure pole of imported equipments. The measurement system developed can provide basic decision-making support for laser controlled field leveling.

通过室内和室外试验表明：自主设计研发的智能三维地形测量系统和激光平地辅助决策支持系统可以正常稳定工作；智能三维地形测量系统高程测量的误差小于2cm，工作效率同比同类设备高2倍多；激光平地辅助决策支持系统能为激光平地作业提供必要的决策支持。

Then, the method is extended to the problems of decomposing a polyhedron with or without holes into the minimum number of terrain polyhedra, both of which are also shown to be NP-hard.

然后将证明方法推广到地形多面体剖分的问题：将一个带洞多面体或者简单多面体剖分成最小数量的地形多面体，这两个问题都被证明是NP-hard的。

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％。