drag layer 中文意思是什麼
drag layer
解釋
使瀏覽者可拖動層中的元素-
Airplanes drag along a very thin shield of motionless air known as a boundary layer.
飛機拽著一層很薄的緊貼機面不動的空氣一道向前運動，這層空氣叫做附面層。 -
The drag is a force per unit area of the layer.
拖力是流層單位面積的力。 -
And during each period of the process of the crystalline basement stick, the interface with relatively bad welding had coupled movement with the overlying layer. as a result, the overlying layer happen to be dip - slip drag
研究認為，結晶基底在拼貼焊合過程中，其地體拼貼面之間焊合程度較差的界面在後期各階段的構造活動中，與上覆地層發生禍動。 -
Drag them directly to background layer, small dot layer and smaller dot layer respectively
分別直接在背景圖層、小逗點圖層、更小的逗點圖層中拖動 -
In the thesis the low drag - low noise optimization of the vehicle main form design is realized, main accomplishments are as follows. researched the knowledge of drag and flow noise, the parameters of the boundary layer are calculated by the hess - smith method and boundary layer momentum integral method. the calculation of the length of transition zone and change in boundary layer displacement thickness between laminar and turbulent states in the transition is improved, then the drag coefficient and self - noise from the transition zone are calculated as the objective functions of the optimization
主要研究內容和成果如下：對航行器繞流流場進行分析，深入研究了阻力和流噪聲產生機理，建立了阻力系數和自噪聲的評估數值計算模型；採用物面分佈源匯法和邊界層動量積分法對繞流流場的流體動力參數進行計算，改進了轉捩區長度和邊界層位移厚度的計算，應用於航行器頭部駐點自噪聲的計算；最後設計了阻力系數和自噪聲數值計算程序模塊。 -
It is provided by the result of observing for the trial of pile, if the cast - in - place is constructed according to strict technological process, the limit load - bearing capacity of single pile is more larger then its calculational value, and under the function of the most trial loading, the frictional drag haven " t occur yield in every major loading layer, so the pile have greatly safety reserve in engineering
樁試驗的觀測結果證明，按照嚴格工藝流程施工的鉆孔灌注樁，其單樁極限承載能力遠大於計算值；在最大試驗荷載作用下，各主要持力層均未出現摩阻力屈服現象，樁有較大的工程安全儲備。 -
Based on theoretical analysis, microbubble drag reduction is due to structure change of turbulent boundary layer caused by the microbubbles. experiments testify microbubble drag reduction for turbulent boundary layer, as well as bubble size, main flow velocity, etc. affecting the reduction ; with proper flow field model, turbulent model and difference scheme, numerical methods simulate the effect of boundary layer and bubble numbers on dray reduction
理論分析提出微氣泡降阻機理在於其引起湍流邊界層結構的變化；實驗證明了微氣泡對湍流邊界層的降阻作用以及氣泡尺度、主流速度等對降阻作用的影響；數值方法利用適當的流場模型、湍流模型和差分格式，模擬邊界層和氣泡數等對降阻的影響。 -
Based on prandtl ' s momentum transportation, this paper calculates in detail the physical quantities such as eddy viscosities, and ratio of eddy viscosity to motion viscosity, total stresses with respect to relative position in three regions of viscous sub - layer, buffer layer, and main turbulent stream for non - newtonian fluid flowing turbulently in ducts, which according to karman ' s three layer models and measurement of fluid parameters in evaluation apparatus, discusses the influence of polymer drag reduction on flowing properties of non - newton fluid, analyzes quantitatively principle of turbulent reduction phenomenon and condition of increasing reduction rate
摘要以普蘭德動量傳遞理論為基礎，按照卡門的三層模型，通過室內模擬環道用0號柴油及加入減阻劑在圓管內的流動參數的測定，計算了非牛頓型流體管內湍流邊界層的層流內層、過渡層、湍流中心的渦流粘度，渦流粘度與運動粘度比、總應力隨相對位置的變化等定量參數，探討了高分子減阻劑對非牛頓流體流動特性的影響，對湍流減阻現象的機理與增大減阻率的條件進行了定量分析。 -
Experimental investigation of drag reduction mechanism over compliant wall and multi - scale coherent structure control in turbulent boundary layer
柔性壁面湍流減阻機理與多尺度相干結構控制的實驗研究 -
The results are compared with the cases in a single - layer fluid, showing that the density stratification can have a relative large effect on the drag and lift coefficients as well as the vortex shedding
計算受迫振蕩圓柱體的升力系數、阻力系數隨時間的演化曲線和圓柱體的尾渦分佈，以及圓柱體的受迫振蕩激發兩層流體內界面的擾動，並與均勻流體的情況進行了比較分析。 -
All of the results indicated the turbulent boundary layer had been turned into the laminar layer. the skin friction coefficient drops rapidly. this result not only proved the phenomenon of reverse transition had occurred, but also showed that this condition was drag - reducing condition
實驗結果表明板面附近的流動已由湍流流動轉變為層流流動，同時平板表面的摩擦系數較沒有溫度梯度時有大幅度下降，不僅證明了邊界層逆轉捩現象的存在，也說明了這種條件起到了減阻的效果。 -
Effect of drag reducing grooved surface on high - order moments in turbulent boundary layer
減阻溝槽表面對湍流邊界層高階矩特性的影響 -
The object model called ecospace uses the db2 udb database as persistence layer, and can be used to connect to user controls like datagrids, offering drag - and - drop, autoforms for individual items, save, undo, redo, and so on, all on top of the db2 udb database tables
這個對象模型（稱為ecospace ）使用db2 udb數據庫作為持久化層，可以用來連接用戶控制項（比如datagrid ） ，在db2 udb數據庫表上提供了拖放、自動表單（針對單獨的條目） 、保存、撤消、重做等功能。 -
The fact that grain of sand is fine or silty, with thin layer and little - scale scours means that the water energy was low. grain analysis tells its transiting character between turbulent flow and drag flow with the same character as sub - fan. in the core, every sequence is positive rhythm and debris flow that is not developed in delta was also found
巖電關系分析表明，孔隙度與聲波時差成正相關關系，與自然伽瑪呈負相關關系，而滲透率與孔隙度具有較好的指數關系，據此建立了解釋模型，在測井數據標準化的基礎上進行了測井解釋，較為準確地反映了井點處的物性特徵。
分享友人