roughness elements 中文意思是什麼
roughness elements
解釋
增加河床粗糙度的構件-
Comparing with the neutral cave on the smooth plane that was thumb - like and opened at the bottom, the neutral caves on the plane with single roughness elements were closed circles. with the growing of roughness element s height, the closed circle became smaller
實驗中發現與光滑平板邊界層的下端開放式的拇指型中性曲線相比較，有粗糙元平板的中性曲線為封閉式的環形曲線，隨著粗糙元高度的進一步增加中性曲線收縮為更小的閉合環。 -
Roughness elements ; boundary - layer transition ; t - s wave
粗糙元轉捩t - s波 -
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。 -
Bamboo salt contains abundant mineral elements which are helpful to accelerate hand blood circulation, relieve hand dryness, peeling, roughness and chapping, thus make hands white, tender and smooth
竹鹽中含有豐富的礦物成份，加速手部血液循環，改善手部乾燥、脫皮、粗黑老化和龜裂，令雙手保持白皙纖嫩潤澤。 -
An experimental investigation on the effect of single two dimensional roughness elements on boundary layer transition
二維單一粗糙元對邊界層轉捩影響的實驗 -
An experimental investigation on the effect of single two - dimensional roughness elements on boundary - layer transition
二維單一粗糙元對邊界層轉捩影響的實驗 -
It was found that there was a close relationship between the adhesion strength of the bg coating and the surface roughness of the titanium alloy and the firing temperature. the chemical state of the elements ti and si at the coating interface varied. the chemical bond and the mechanical occluding make the bg coating form a strong adhesion with the titanium alloy
通過研究發現， bg塗層與基體的結合強度與基體表面的粗糙度以及燒成溫度密切相關，塗層界面處ti元素和si元素的化學狀態發生了變化， bg與基體強結合的機制為化學鍵和機械嵌合兩種力共同作用。 -
Standard lamp and diffusers are very important calibration elements, in chapter three, first uv and vuv radiometric standard for calibration are introduced. then the fabrication and characteristics of baso4 diffuser and alminium diffuser are researched, the baso4 diffuser ' s hemispheric reflectance and bi - directional reflectance distribution function were measured and compared with lambtian surface, and the deviation from that of lambtian surface is given. in the experiment, al diffuser ' s brdf is researched, obtain the change of spectral characteristic of al diffuser, compare al diffuser ' s brdf before and after coated with al + mgf2, and different al diffusers with different surface roughness
鋁漫反射板作為一個漫反射光學元件安裝在太陽紫外光譜監視器的入射狹縫前，太陽紫外光譜監視器在軌測量時，太陽輻射入射到鋁漫反射板后進入入射狹縫，光譜輻照度的角度是變化的，本章測量了鋁漫反射的相對雙向反射分佈函數，研究了鍍膜（ al + mgf _ 2 ）前後光譜反射率的變化，漫反射的光譜特性及漫反射板表面粗糙度對相對雙向反射分佈函數的影響，使得測量數據反演成為可能。 -
An experimental investigation on the transition in the boundary layer of horizontal plane with and without single two - dimensional roughness elements has been carried out in the wind tunnel. the distribution in normal and stream - wise directions of intensity of t - s wave excited by vibrating beam was measured in every condition. neutral curves were obtained by measuring the growth of the t - s wave at the normal critical location along the stream - wise direction
在風洞中對水平光滑平板以及加有粗糙元平板的邊界層轉捩進行了測量與研究，比較了不同情況下平板邊界層內由振動梁激勵生成的t - s波沿流向和法向強度的分佈規律，得到了相應的振型增長曲線以及中性曲線。
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