bottom boundary 中文意思是什麼
bottom boundary
解釋
底界面-
Due to nonlinear bottom boundary condition, the generation of internal tides over finite topography can only be deal with by using of ray - tracing method beforetime. the transforms introduced in this dissertation make it possible use eigenvalue method to investigate the generation of internal tides over finite topographies
由於非線性邊界條件的使用，前人處理有限地形上內潮的產生問題只能求助於射線理論，本文提出的坐標變換將若干海底地形變換成平底，從而使得利用特徵值方法研究這些地形上的內潮生成問題成為可能。 -
For motor shafts, the highest stress is at the boundary between the key groove and the ring groove ; the next one is at bottom and terminal of the spline. according to the results, the 17. 4mm shaft is insecurity, the 22. 2mm and 30. 2mm shafts are security
在軸的安全性上，對17 . 4mm泵軸計算結果是不安全的；對22 . 2mm泵軸計算結果是安全的；對30 . 2mm電機軸計算結果是安全的，而且還有較大的功率輸出空間。 -
For the 30. 2mm shaft, there are still larger over measure to load. the strength is increased by optimization. for ? 17. 4mm shaft, the strength is increased by enlarge the inner dimension of the spline ; for 30. 2mm shaft, the strength is increased by adjust the structure at the boundary between the key groove and the ring groove, the highest stress of the shaft is at bottom and terminal of the spline after optimization
其中對17 . 4mm泵軸的優化，通過增大花鍵內徑，提高了花鍵齒底的強度，降低了應力集中點附近的應力；對30 . 2mm電機軸的優化，通過在軸承鍵的環槽端增加倒角，有效降低了該位置的應力集中，使軸的最大應力點從軸承鍵與環槽的交界處轉變到花鍵根部與收尾的交界處，提高了電機軸整體結構強度的合理性。 -
Because the stream moving along the bottom displaces the lighter fluid upward, a force must be provided to overcome boundary resistance.
因為沿底部運動的異重流與上部較輕的流體置換，必須產生一種力來克服邊界阻力。 -
The high or low velocity anomalies ' s locations are consistent with the uplift and depression respectively, and their contacting boundary always correspond the faults exposed on the ground ' s surface. the basement interface that is the bottom interface of the sedimentary cover undulates strongly
上部地殼高速異常和低速異常分別與地表的隆起和坳陷高度一致，高速異常和低速異常的接觸帶往往與地表的斷裂位置有良好的對應關系，沉積蓋層底部的基底界面橫向上起伏變化較大。 -
The main original work is as the followings : 1. longitudinal vibration of an integral pile in an uniform soil with end bearing boundary or elastic bottom boundary undergoing vertical harmonic load is theoretically investigated
主要工作如下： 1 、分別對均質土中完整端承樁和彈性支承樁在垂直諧和激振力作用下的縱向振動特性進行了研究。 -
Several numerical experiments are carried out to detect the actual steps and limitation for the velocity and depth parameter ' s ray inversion in the fourth chapter, and the we find that : a. the resolution capability of the layer ' s velocity change along both the top and bottom boundary is very poor. thus generally the vertical homogeneous layer model whose top velocity equal to that of its bottom boundary should be considered
本文的第四章通過一系列模型試驗詳細探討了利用射線反演方法反演速度和深度參數的實際步驟，認為走時反演對速度層內頂部和底部速度變化的分辨能力很弱，僅僅依靠走時數據難以反演出層內頂部和底部的速度變化，故一般情況下應採用速度層底部和頂部速度相同的縱向均勻模型。 -
This paper is based on practical drilling data of drilled irruptive rock body in western sha segment of huimin depression, rock body subfacies in this phrase and seismic, electric logging features in pyrolysis metamorphic belt are analyzed, so as to summarize a set of practical methods, which identify drilled various subfacies and irruptive rock top and bottom boundary by cuttings log and drill time logging
本文以惠民凹陷西部沙三段已鉆遇侵入巖體的實鉆資料為依據，嘗試性地對沙三段侵入巖體各亞相帶及熱解觸變質帶的地震、電測響應特徵進行研究，總結出一套較為實用的通過巖屑錄井、鉆時錄井手段識別所鉆遇的各亞相帶和進行侵入巖體頂、底界卡定方法，現場應用效果很好。 -
In order to calculate depth - averaged two - dimensional ( 2 - d ) suspended sediment transport under waves and currents in the yangtze estuary, a numerical model system is developed. four models, a 2 - d compound fluid model including wind, waves, tides and river runoff, a swan wave model, a wave - current bottom boundary layer model and a 2 - d suspended sediment transport model are integrated
本文建立了一個用於波?流共同作用下長江口平面二維懸沙計算的數值模型系統，主要由四部分組成，即考慮風、浪、潮、徑流的二維復合流場模型、 swan海浪模型、波?流相互作用的底邊界層模型以及二維懸沙輸運模型。 -
The effect of wave radiation stress is considered in the compound fluid model. the value of bottom friction is offered by the wave - current bottom boundary layer model
復合流場學模型中考慮了波浪輻射應力的作用，底摩擦由波?流相互作用邊界層模型提供。 -
Regarding foundation - pit scope of numerical analysis as a system ; settlement of foundation - pit boundary, displacement of retaining structure and swell of foundation - pit bottom as output of the system ; factors during construction of draining water, earth excavation and retaining structure as input of the system
為此視基坑數值分析范圍為一個系統，基坑周邊沉降、支護結構位移和坑底隆起為系統輸出量，降水、開挖和支護施工各工況中變化的因素為系統輸入量。 -
Results indicate that the characteristics of cavity flowfield were altered similarly by gas and liquid injection. the local boundary layer or shear layer are modified by injection on upstream / bottom wall of cavity, and the cavity shear layer immediately becomes angled with respect to the main flow direction. the injection on fore wall of cavity has little effect on the characteristics of cavity flowfield
結果表明:氣體/液體噴流對凹腔整體流動特徵的影響是一致的，凹腔上游/底壁噴流破壞了當地附面層或剪切層，導致凹腔剪切層偏向主流方向;凹腔前壁噴注對凹腔流場特徵基本無影響。 -
Due to the existence of the eddy and the abrupt bend of the stream line, the pressure on the four faces has the distribution as follow : the lowest pressure appears at several centimeters after the angle point along the top boundary, the highest pressure appears near the center line of the vertical shaft on the bottom boundary, near the angle point, the pressure on the inner boundary decreases with the decreasing height, the pressure on the external boundary decreases slightly in the right - angle region, and increases obviously near the corner
迴流漩渦的存在，以及直彎處流線的急劇彎曲，導致壁面壓力分佈在上表面距彎點一定距離后出現壓力最小值，下表面上，在豎井中心線略偏下游的位置出現壓力最大值，豎井內表面接近彎點處出現壓力沿程降低的現象，豎井外表面壓力在進入直彎后先是沿程略有降低，在直彎角落處又明顯升高。 -
Prediction of upper and down sandbodies in the bottom boundary of sequence of jurassic in junggar basin and evaluation of favourable areas
層序底界上下砂體預測與有利區評價 -
In calculation, the bottom shear stress under the effect of waves and currents is supplied by the wave - current bottom boundary layer model
計算中的底部剪切應力由波流邊界層模型給出波?流共同作用下的形式。 -
2 ) the dynamic responses of the saturated soil are analyzed respectively when the normal incident waves from bottom boundary are p - waves and sv - waves. the responses of the soil skeleton and the pore fluid are studied, while the influences of different permeability coefficient and the surmounting loads on the dynamic responses of two - phase media are expounded
分別進行了在底邊界p波與sv波垂直入射時飽和土的動力響應分析，研究了動力作用下土骨架和孔隙流體的反應，同時闡述了滲透系數和上覆荷載對兩相介質動力響應的影響。 -
In the third chapter, the paper describes the conceptual model of research area : in plane, the range and boundary of the model accords with that of tong - pu - he karst - groundwater sub - system ; in vertical, the model ranges from the bottom of cambrian to the phreatic surface
第三章，確定研究區概念模型如下：在平面上，模型範圍與銅蒲合巖溶水系統范圍一致。銅蒲合巖溶水系統的邊界就是該模型的邊界。在垂向上，上至潛水面，下至寒武系底面。 -
In the case of computation of invariant flow in the flume, the boundary conditions on bottom and wall of the flumes are managed specially according to the view of wall function method, and the formula about u * is deduced according to the hydraulic characteristic of invariant flow in the flume
在實驗水槽恆定流的計算中，根據壁面函數法的基本原理，對槽底及壁面的邊界條件做了相關的專門處理；並根據實驗水槽恆定流的水力特性，導出了摩阻流速計算公式。
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