stream velocity 中文意思是什麼

stream velocity 解釋
河流流速
  • stream : n 1 河流,小河;川,溪。2 流出,流注;一連串,(人物等的)輩出。3 (事件等的)連續;(財富等的)...
  • velocity : n. 1. 迅速;快速。2. 速度,速率。3. 周轉率。
  1. In the bed load layer, the stream - wise particle velocity profile follows the log - law, and the average is 8. 2u *

    在推移區內,顆粒的縱向速度沿垂線接近對數分佈,平均運動速度為8
  2. The velocity in the intake is not equal to the stream velocity.

    進口的流速不等於河水流速。
  3. We can use the mm5 model in definite time, definite area weather forecasting. we conclude that : : the moving route of this necw in its developing progress was direct - south along latitude, the cold air is rough, and just this made the rough vertical velocity ; the necw southern moving and conflicting with the west pacification sub - tropical high makes rough jet steam. the plenty south - west warm and wet air made by the jet stream gave the rainstorm demanded vapor ;. the rough vertical velocity by jet stream is a main reason in this rainstorm ; the mm5 model uses four - direction analysis data as its input, this avoids some errors occurred in observe and transfer, thus made the result more useful

    綜合分析認為: ( 1 ) 、這次冷渦在其發生發展過程中,其移動路徑是沿經圈直線南壓,攜帶的冷空氣勢力較強,形成槽后較強的垂直運動; ( 2 ) 、西太平洋副熱帶高壓偏北位置與東北冷渦南壓形成的急流軸,把源源不斷的西南暖濕氣流輸送到遼西地區,也就是急流軸的左前方位置,為這次暴雨的產生提供了充足的水汽來源; ( 3 ) 、低空急流不但為暴雨輸送水汽,其造成的較強的垂直環流也是產生強降水的一個主要原因; ( 4 ) 、 mm5模式以四維同化資料作為初始場,最大限度地避免了觀測誤差可能造成的積分不穩定,提高了模擬結果的參考價值。
  4. By performing fourier transformation, the relationship between the turbulent intensity of the particle and that of the carrier fluid was obtained which makes clear that particle size, specific gravity, velocity gradient, and the characteristic frequency of energy - containing eddies are four basic influencing parameters. it is proven theoretically that under certain conditions, the stream - wise and transverse particle turbulent intensities exceed those of the carrier fluid. based on the equations of two - phase flow, the presence of fine sediment suspension is shown to attenuate the turbulent intensity of the water

    通過對細小顆粒在剪切流場中運動方程的fourier分析,得到了顆粒脈動強度和流體脈動強度之間的定量關系,表明顆粒粒徑、顆粒密度、流速梯度以及紊動場含能旋渦的特徵頻率是影響顆粒脈動強度的主要因素,首次從理論上證明了在一定條件下,顆粒在縱、垂向的脈動強度均會超過相應的流體脈動強度,為已有的實測資料提供了合理的解釋。
  5. A new method is presented. the travel time, including the time delays associated with overland folw pathways, is obtained. it is expected that the hillslope velocity and the stream velocity are different, and different equation is used. in the method, the fact that velocity increases going downstream in river systems is taken into account. after the travel time of each cell being calculated, the frequency distribution of the times of arrival of individual water droplets at the catchment outlet - giuh, is obtained

    提出了一種匯流時間計算方法,匯流時間中包括坡地漫流時間和河道匯流時間。方法中坡地單元的匯流速度與河道單元的匯流速度採用不同的計算公式,同時考慮流速沿河道向下游的變化。流域中每一個網格單元的匯流時間得到后,將其看作隨機變量,進行統計分析后,得到匯流時間的頻率分佈? giuh 。
  6. In addition, the microcosmic stream, especially suspended load ( mainly suspended soils and sands ) reflected on the characteristic of transported sands " streams, and always silt up and form shoal in the place where the stream velocity is lower and river steam return easy

    河道的微觀水流,特別是懸浮物(主要是懸浮泥沙)反映輸沙水流淤積特性,總是在流速緩慢、易迴流的地方淤積、形成新生沙洲,為正在發生及將來發生的河道淤積和演變打下基礎。
  7. The distribution of stream - wise particle velocity follows the log - law under various flow conditions and for different particle diameters, and the fluctuation of the other two velocity components is random

    對不同的粒徑和不同的水流條件,顆粒縱向平均速度都符合對數分佈規律,垂向和橫向的平均速度屬于隨機波動的范圍。
  8. ( 6 ) as dean number is increased, the secondary flow firstly becomes symmetry and then the anticlockwise vortexes are enlarged, the contours of axial velocity and the stream function become symmetry, the secondary flow is intensified and the friction factor ratio increases

    ( 6 )增大dean數,二次流先趨于對稱而後逆時針方向的二次渦增大,軸向速度和流函數等值線趨向于對稱,摩擦系數比增大。
  9. ( 5 ) as torsion is increased, the anticlockwise secondary vortexes and the negative area of the stream function increase ; the axial velocity moves anticlockwise ( annular pipe ) or clockwise ( circular pipe ) ; the friction factor ratio finally reaches the value about 1

    ( 5 )增大撓率,逆時針方向旋轉的一二次渦和流函數的負值區域增大,軸向速度最大值的位置按逆時針(環形截面)或順時針(圓截面)方向旋轉,摩擦系數比最終趨向於1 。
  10. Abstract : the effective shear stress of sediment transport is analyzed theoretically and tested by experimental data. the result shows that the effective shear stress is neither the overall shear stress nor the sand grain shear stress, but the geometric mean of these two stresses. the effective shear stress not only generalizes the flow intensity but also summarizes the flow intensities of mean flow velocity, stream power and unit stream power

    文摘:本文通過理論分析及實測資料檢驗表明,無論對於何種泥沙運動狀態,決定泥沙運動的有效切應力既不是沙粒切應力又不是全部切應力,而是介於兩者之間,近似為沙粒切應力與全部切應力的幾何平均值.這一有效切應力不但是對切應力類水流強度指標的總結,還可以概括平均流速和水流功率等水流強度指標
  11. Abstract : in this paper, experimental study on the influence of air temperature, air velocity and feed rate on the process of impinging stream drying ( isd ) had been performed on an experimental coaxial impinging stream dryer, a number of important conclusions were attained

    文摘:利用對撞流乾燥法,對小米進行了風溫、風量和喂入量等操作參數的試驗研究,得到了小米的乾燥特性規律。
  12. Fluent can imitate relation curve about heat transfer coefficient k and re, friction resistance coefficient f and re, the isoline about dot metrix between velocity field and temperature grads field. it also drafts several operating mode simulated stream field, velocity and temperature grads field

    應用fluent軟體擬合出傳熱系數與re關系曲線、摩擦阻力系數與re關系曲線、速度與溫度場梯度點積值的等值線圖, nu較大的幾個工況的模擬流場、速度和溫度梯度場。
  13. Mean velocity distribution, mean length of recirculation region and the structure of instant stream are presented by the experimental data, which help us understanding character of this flow further

    實驗給出時均流速分佈、時均迴流區長度和瞬態流動結構,探討了后臺階分離流流動特性。
  14. The frequence and modal of main stream piping were analysed under the condition of different velocity of stream and the valve taken as the centralizing mass. this paper also gives the responses of steady state under the condition that the frequency of forced vibration is 4hz 、 8hz 、 12hz respectively

    將閥門作為集中質量處理,分析計算不同蒸汽流速下,某汽輪機主蒸汽管道系統的振動頻率和振型,並給出了激振力頻率分別為4hz 、 8hz 、 12hz時該管道系統的穩態響應。
  15. Relativel ~ ~ matlab language is more powerful than oilier computing language, especially in computation fluid mechanics, it helps to simply draw charts of vortex, stream function, velocity, pressure, and the amount of work can be extremely reduced, and the program coniplving can also be controlled easily

    得到空化數的分佈以後,進而分析流場內空泡的運動軌跡,最後得到空泡半徑在流場內隨壓力的變化關系曲線,以及在流場內空泡半徑沿壓力最小點的分佈規律。
  16. The card is based on the flat roof of pc machine, at first, we are used of the source of program data to leave in ide care, then binary file is come by the send out card, which is transmitted the standard ' s transmission stream. according to the european the standard of dvb - c, variable transmission current velocity rate is 9. 6 - 38. 4 mbits / s

    此卡基於pc機平臺,首先將節目源數據以二進制文件的格式存放在普通ide硬盤上,然後通過計算機的pci總線將二進制文件經過發送卡轉換成符合數字電視asi (異步串列介面)介面標準的平穩碼流。根據歐洲dvb - c標準,可變的傳送流速率為9 . 6 ~ 38 . 4mbit s 。
  17. In the near field, the vortex pairs are gradually and periodically formed, and at the same time they migrate down stream under the self - induced velocity

    在作動器出口附近,旋渦對逐漸捲起並向下游推進,而且旋渦對是不連續的。
  18. In the east of greenland and the northwest of canada, there were obvious correlation between the vertical velocity field and the temperature anomaly of the same term. but the stream field continuous anomaly region can primely explain the phenomenon

    藉助于svd分析方法,逐日分析了30hpa垂直速度場與同期30hpa溫度場間的關系,在格陵蘭東部地區和加拿大西北部的垂直速度與同期溫度距平異常有顯著的關系。
  19. Effect of vareriana officinalis var. latifolia miq on arteria basilaris caliber and blood stream velocity of rabbit with subarachnoid hemorrhage

    寬葉纈草對兔蛛網膜下腔出血后基底動脈管徑和血流速度的影響
  20. The study shows that the substrate and other physical variables ( stream mean width, depth and velocity ) in changjiang river system from 1st to 6th order streams present a continuous gradient of physical conditions

    研充表明閶江河一至六級支流平均寬度、深度、流速及底質組成和顆粒大小等物理參數具有明顯的梯度變化。
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