terrain roughness 中文意思是什麼
terrain roughness
解釋
地面粗糙度-
To the influence of the plateau terrain, the impact of the elevation and the roughness of terrain to every energy component out and incoming are study, and basing the soil spectrum model proposed above, a new radiative transfer model of terrain area was put forwarded in which the soil water content, lai, terrain roughness and elevation were considered synchronously, and incoming scatter light was integral with the solid angle of semi - globe space defined by the slope of the pixel, so scattering lights of terrain and the sky are properly considered, but the operation is still within the acceptable range
地形與反射率的關系是本文研究的一個重點。本文對崎嶇山地象元的各入射光和反（散）射光分量進行了深入分析，在所提出的濕潤土壤光譜模型和植被冠層模型的基礎之上進一步提出了新的適合青藏高原的山地輻射傳輸模型。該模型同時考慮了土壤含水量、植被覆蓋（ lai ） 、地形起伏和海拔高度的影響，並以象元坡面定義的半球空間立體角對環境入射光進行積分，使周圍地形和天空散射光均得到適當考慮，計算量又在可接受范圍內。 -
The famous algorithms include roam, vdpm, adaptive triangulation based quadtree and the improved algorithms of them, etc. however, the improvement of the present algorithms mainly focus on the selection of data structure which can speed up generation of the tmrm, few works were put into ameliorating the simplification criterion, hi fact, the simplification criterions used by the algorithms at present are constructed with only two elements which are the distance the vertex from the viewpoint and the roughness of terrain expressed by z coordinate
地形多解析度模型的生成演算法種類較多，著名的有：自適應優化格網演算法（ roam ） 、基於視點的累進格網法（ vdpm ） ，基於四叉樹的自適應剖分演算法以及基於各演算法的各種改進演算法等等。但目前人們對演算法的更新及改進主要是從數據結構的角度來考慮，對簡化準則沒有做實質性的改進。 -
Based on wind speed observation record with drawback, it is proved that the exponent expressing terrain roughness can be calculated according the monthly maximum wind speed records at various height levels. wind characteristics of bridge site are determined by statistical method
針對橋址區風速觀測記錄的特點，證明了利用不同高度處月最大風速記錄推算地表粗糙度影響系數的可行性，並對通過最小二乘擬合得到的地表粗糙度影響系數進行統計分析，最終確定橋址區風特性。 -
The vertical extent of this layer in strong winds depends mainly on the roughness of the underlying terrain, but is usually many hundreds of feet.
強風產生的該層厚度主要與地形的粗糙程度有關，通常有好幾百英尺。 -
The principium of the simplification criterion is that the light eradiated from surface will attenuate during it ' s transmission, so the light energy eradiate from the surfaces far from the viewer will become too faintness to attract the viewer ' s attention, thus the surfaces far from the viewer can be emerged into larger surface, then by combining with the residual light energy and terrain roughness, the new simplification criterion is formed
本文根據光能衰減原理，從人的視覺效果出發，認為由於地形面片輻射的光能將隨著距離增加而不斷衰減，所以距離視點較遠處的面片輻射到視點的光能必然很微弱，這樣就可以將遠處的面片合併成較大的面片，從而達到簡化地形的目的。
分享友人