roughness coefficient 中文意思是什麼

roughness coefficient 解釋
糙率系數
  • roughness : n. 1. 粗糙；凹凸不平，崎嶇；蓬亂。2. 粗暴；狂風暴雨。3. 未加工。4. 難聽，刺耳；味澀；不調和。5. 概略。6. 【工業】粗糙程度。
  • coefficient : adj. 共同作用的。n. 1. 共同作用；協同因素。2. 【數，物】系數，率；程度。
  1. A test analysis of open canal bottom coefficient of roughness anticlimax on turbulent velocity of flow and intensity of turbulence influence

    明渠渠底糙率突減對紊流流速及紊動強度影響的試驗分析
  2. A transfer model is established, which can be used to study the interaction between the land surface physical processes of inhomogeneous region and the structure of atmosphere boundary - layer over urban and rural terrains. the model has simulated surface heat flux, surface temperature, temperature profiles, height of mixture layer and so on. and the differences between urban area, suburban area and rural area have been compared. this model mainly depends on the parameters below : surface albedo, surface roughness coefficient, moisture available coefficient of soil, thermal capacity and thermal diffusion coefficient of errain, cloudage. the result shows that this model can simulate the structure and eigenvalues of atmosphere boundary layer and their changes in a day. parameters used in this model aim at beijing city, and the time is at the beginning of september. to other cities, or other time, the parameters should be adjusted accordingly. in addition, being adjusted, the model can also be used for other homogeneous and inhomogeneous terrains

    模式主要依賴于以下參數和物理量：地面反照率下墊面粗糙度土壤的可含水量下墊面的熱容量和熱擴散系數雲量等參數。結果表明，本模式能合理地模擬不同地表熱量平衡地表氣溫混合層高度湍流交換系數湍流動能位溫廓線等，以及它們的日變化。該模式所取參數主要針對北京市，時間為九月初，對于其他城市，參數應作相應的調整。
  3. In the traditional wavelet transform, because the wavelet filter and coefficient is fixed, as a result, when the discontinuous signal is analyzed, it will produce a lot of big wavelet coefficients in the transition, which makes against the compression. in the image processing, some image is roughness, and it may has sharp edges and oddity parts

    由於傳統小波變換的濾波器長度和系數是固定不變的，不能適應輸入信號而變化，這使得在分析非連續信號時，在躍變點兩側會產生大的小波系數;對具有尖銳邊緣、分段光滑或奇異點、圖文混合圖像處理效果很差。
  4. ( 3 ) for parameterization of the sensible heat, the positively correlation between surface temperature and bulk transfer coefficient lead to a positive additional sub - scale flux. its magnitude is determined by the grid average roughness and average wind velocity on the reference level

    （ 3 ）對區域感熱通量的計算而言，由於地表溫度和整體輸送系數產生一個正的次網格通量項，它主要由網格平均粗糙度和參考高度平均風速所決定。
  5. The test proves that the roughness - coefficient value reduced to 0. 009 from original 0. 014 by reducing resistance, increase 15 % total amount of transporting water

    摘要重點研究南水北調中線工程表面減阻降糙技術措施，以降低長距離輸水阻力，提高輸水量。
  6. With combining optimization method, an optimal model of determining synthetic surface roughness coefficient in film hole irrigation was developed

    實例計算與方法驗證表明，該方法能夠簡單而有效地確定膜孔灌溉田面綜合糙率系數。
  7. 2 ) radar incidence angle and surface roughness correction : to make radar incidence correction and eliminate the surface roughness effects, a wide range of surface parameters ( soil moisture, surface rms height, correlation length, incidence angle ) was input to the ibm model to simulate the effect of surface roughness and radar incidence angle on the sensitivity of soil moisture to the radar backscattering coefficient. a simple model was established to simulate the effects of incidence angle and surface roughness. 3 ) establishment of soil moisture change inversion model : according to a modified ibm model simulation results, the bare surface backscattering coefficients can be expressed as a funtion of the dielectric component for a given surface roughness when the surface slope greater than 2. 0, which is valid for most nature surface : in above equation, r0 is the surface reflectivity at normal incidence

    本研究中，首先利用基於微波輻射傳輸方程的微波植被模型和積分方程（ iem ）模型模擬了各種地表土壤水分含量情況下，植被覆蓋、地表粗糙度（包括地表均方根高度和相關長度） 、雷達入射角對c波段（頻率4 . 7ghz ）水平極化（ hh ）雷達後向散射系數的影響，在此基礎上，建立模型消除了植被覆蓋、地表粗糙度、及雷達入射角對雷達後向散射的影響，利用多時相50m解析度radarsatscansar雷達後向散射系數圖像反演得到了地表土壤水分變化模式信息。
  8. The additional sub - scale flux is mainly determined by the average grid value, coefficient of variation and correlations among the meteorology parameters. ( 2 ) the additional sub - scale turbulence flux is composed by two parts, one part is induced by the correlations among the transfer coefficient, surface temperature and soil humidity, another is caused by non - line relationship between the transfer coefficient and roughness, stability

    （ 2 ）非均勻分佈引起的附加次網格地表湍流通量主要由兩部分組成：一是地表次網格上輸送系數和地表溫度、濕度的相關項，另一是由於模式中計算整體輸送系數時，整體輸送系數是地表粗糙度和穩定度的非線性函數所造成擾動項。
  9. The difference among the elasticity modulus of various microstructures is probably the main reason, which caused the experiment results above. under the same experiment conditions, such as sample shape, size, surface roughness, establishment of testing system, pressure on the probe, and thickness of coupling medium, the variety of relative attenuation coefficient ( or ) in different heat treatment samples is measured and compared by measuring the attenuation obtained from the cylindrical surface of column. the result is as following : for 40cr and 38crmoal, a mt < az mq < a s < a p + f ; for gcrlssimn, a mt < a annea < s < a p + f ; and a increased with the increasing of frequency

    在保證試樣形狀、尺寸、表面光潔度、系統參數設置、施加在探頭上的壓力以及耦合層厚度等測試條件一致的情況下，利用棒材圓柱面測衰減系數法，分別測定並比較上述不同熱處理試樣相對衰減系數的變化情況，得到的實驗結果是：對於40cr及38crmoal鋼， _ （低溫回火） （淬火） _ （高溫回火） _ （正火） ；對于gcr15simn鋼， _ （低溫回火） _ （退火） _ （高溫回火） _ （正火） ；且隨著頻率的提高，衰減系數均呈現增加的趨勢。
  10. The roughness coefficient experiments indicate that the change in tropical cyclone intensity will be varied with different coefficient. also the experiment indicates the wind of tropical cyclone is reduced by the land and the effect of an tropical cyclone landfalling process could result in the height increasing of tropical cyclone boundary layer

    通過不同的陸地粗糙度參數數值試驗，結果表明，粗糙度越大，熱帶氣旋強度減弱越多，其造成的非對稱結構也越明顯；而且，由於登陸作用，陸地一側的地表風減小，登陸的摩擦作用將可能導致邊界層的高度增加。
  11. Moreover, it was found that the microstructure and physical properties of dlc film were affected to some extent by the distance between target and substrate. when the distance between target and substrate increases, sp 3c content in the deposited dlc film decreases. accordingly, the value of surface roughness, microhardness, friction coefficient, residual stress and band gap became lower in the same way

    此外，靶基距對dlc薄膜的結構和性能也有一定的影響，隨著靶基距增加， dlc薄膜中的sp ~ 3c含量減少， dlc薄膜的表面粗糙度降低，顯微硬度降低，摩擦系數減小，殘余應力減小，光學帶隙eg減小。
  12. It is found that the microstructure and properties of as - deposited dlc films is seriously dependent on the substrate temperature used in deposition processes. with the increase of substrate temperature, sp 3c content in the deposited dlc film decreases, surface roughness and friction coefficient of deposited dlc films increase. at the same time, microhardness, residual stress and optical band gap became lower

    研究發現，基片溫度對dlc薄膜的結構和性能影響最明顯，隨著薄膜沉積過程中基片溫度的增加， dlc薄膜中的sp ~ 3c含量減少， dlc薄膜的表面粗糙度增加， dlc薄膜的顯微硬度降低， dlc薄膜的摩擦系數增大， dlc薄膜的殘余應力都是減小的，光學帶隙eg變窄。
  13. A simple model based on force equilibrium is proposed to evaluate the vegetative roughness coefficient

    根據力的平衡建立了一個一維簡單模型分析植被對水流的阻力。
  14. Taking suspension bridge anchor of runyang highway bridge as project background in this paper, considering undulating angle of rock mass structural plane, angle of mean square root slope method is established by exerting fractal geometry theory. fractal dimension of profile of rock mass structural plane is calculated by above method. and roughness degree is described quantitatively, furthermore correlativity between fractal dimension and roughness coefficient ( jrc ) is analyzed

    本文以潤揚大橋懸索橋錨碇摩阻力研究為工程背景，運用分形幾何理論，從巖體結構面起伏角的角度出發，建立了均方根坡度角法測算巖體結構面剖面輪廓線的分維數，定量描述其粗糙程度，並分析了分維數與粗糙度系數jrc之間的相關關系。
  15. Describe rock joint roughness coefficient with fractal dimension

    巖石節理粗糙系數的分形描述
  16. Fractal research of joints roughness coefficient of rock

    節理粗糙度與分維
  17. Fractal description of two - phase medium cementation plane roughness coefficient between rock and concrete

    混凝土兩相介質膠結面粗糙系數的分形描述
  18. As for moving tc, its symmetry somely rusume after landfalling. the different distributing between expb2 and expb3 is much smaller than the other exps of the same group, so it is shown that if the roughness coefficient come to a certain number, the effect of roughness maybe not take the leading key in tc decreasing process any more

    對于移動熱帶氣旋登陸而言，登陸后對稱性有所恢復，當下墊面粗糙度達到一定值時，由於粗糙度引起的差異明顯減小，粗糙度在其減弱的過程中可能已不佔主導作用。
  19. This paper discuss the effect of roughness coefficient on the tropical cyclone landfalling process using a idealized tc model developed from psu / ncar mm5 in the condition of quiescence and f - plane atmosphere. in order to understand the different influences of land and sea surfaces in the tc landfalling process, two kind of experiments had been designed : one for settled tc, the other for movable tc, and each kind consists four tests. the result indicates that the distribution of wind, precipitation, warm core and intensity of tropical cyclone has been changed obviously due to the effect of difference between the land and sea

    本文利用bogus技術在psu / ncarmm5中加入了理想熱帶氣旋初始渦旋，在f -平面和無環境流場的理想情況下，設計了兩組靜態和動態試驗，通過控制試驗和不同粗糙度的登陸試驗，分別從空間和時間上探討了理想熱帶氣旋的登陸規律和分佈特徵，特別研究了邊界層中熱帶氣旋中心區域風場的垂直細致結構，並初步分析了其物理機制。
  20. In this paper a date from some real projects are used to analyse the facors that will affect the energy dissipation and erosion prevention. such as flood discharge across the cofferdam, crest elevation, downriver cofferdam, roughness coefficient and the gradient of the surface of dam, and so on. in this paper, the program based on hydraulics is checkout by the tankeng waterpower project in zhejiang. the results prove that this program can be used to design any project where there is no obvious side shrinking phenomena

    本文結合工程實際對影響圍堰和壩體消能防沖的各種因素，包括過堰流量、壩面高程、下游圍堰堰頂高程、壩面糙率、壩面坡度等進行了分析，並藉助水力學知識和計算機語言編寫了圍堰和壩體的優化計算程序，並利用浙江灘坑水電站工程對所提出優化計算程序進行了驗證，證明了該程序在沒有明顯的側收縮的影響下，計算結果與實際情況較為吻合。
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