backward flow 中文意思是什麼
backward flow
解釋
反向流程-
Then, the program is used to simulate the flow across the backward - step, and the conclusion is testified that the circumfluence length is related to the reyonlds number
同時，利用程序對后臺階繞流流動進行計算，驗證了后臺階繞流迴流長度和雷諾數有關的結論。 -
The effect of air distributor on the flow fields was studied with emphasis. the working conditions of the bubble column simulated in the numerical study were as same as in the experiments. the velocity profile at axial direction showed a peek in the center, and a backward flow near the wall when usl / usg < 19. 6
鼓泡塔內軸向液相速度的徑向分佈呈塔中心峰值、壁面附近倒流形式，且與氣相折算速度大小有關，當液相折算速度一定時，隨氣相折算速度增大而愈加陡峭，返混也劇烈。 -
No backward flow will occur in the specially designed evaporation chamber of the system. the condenser is built with automatic bubble elimination mechanism
特殊設計使蒸發室不致有逆流發生，並且，在濃縮過程中有自動消除泡沫之功能。 -
Comparison of flow regimes is made for different reynolds - number flows and mesh refinement. the current study for the laminar flow over a backward - step facing step explores the influence of the sidewall on the development of three - dimensional flow for re > 400. meanwhile, this paper attempts to study on some important aspects of time - dependent incompressible viscous flow
本論文的主要研究成果有： 1 、評述了三維粘性流動數值模型的研究現狀，分析了各數學模型的建模思想及相應的數值計算方法，提出了當前存在的高精度的數值計算方法和邊界條件的適定性問題。 -
Evident backward erosion had appeared in the coastline of the delta region in recent years owing to decreaseof flow and sediment from the yellow river
近年來黃河來水來沙呈遞減趨勢，現行河流路海岸線淤進減緩，原行河流路海岸線出現了嚴重的蝕退。 -
Metal flow is a very inhomogeneous process during backward extrusion of complex box body, relative shape and size of the blank is a key factor which affect metal flow
摘要復雜盒形零件的反擠壓是一個極其不均勻的流動過程，坯料的相對形狀及尺寸是影響金屬流動的關鍵因素。 -
In the numerical solution algorithm, the method of characteristics, analytic method and galerkin finite element method ( galerkin - fem ) can be chosen to solve the advective equation, diffusion equations, reaction ( source / sink ) equations, propagation equations and pressure poisson equation, respectively. the developed new algorithm has been verified using analytical solution of circular conduit flow in a reynolds number range of 100 < re < 1 000 and experimental data of the laminar flow over a backward - step facing step. the flow properties are well characterized by this three - dimensional numerical model
本論文在評述三維粘性流動數學模型已有研究成果的基礎上，著重在數值計算方法的選擇和定解條件的給定對數學模型計算結果的影響進行了研究，並首次提出了求解三維純對流方程的高精度的擬協調單元法，建立了三維低雷諾數re流動的數學模型，並在圓管流動、臺階突擴矩形管道流動中得到驗證和應用。 -
In chapter one, we propose a new mixed method called characteristics mixed finite element method for a convection - dominated diffusion problems with small parameter e : we handle the convection part whth backward difference scheme along the characteristics, obtain much smaller time - trunction errors and avoid numerical dispersion on the front of the peak curve of the flow : we use a lowest order mixed finite element method to deal with the diffusion part, so this scheme can approximate the unknow function and its following vector with high accuracy at the same time
第一章中我們對小參數對流占優擴散問題提出了新的數值方法? ?特徵混合有限元方法，即對方程的對流部分採用沿特徵線的後退差分格式求解，以保證較小的截斷誤差限並避免了在流動的鋒線前沿數值彌散現象的出現；對流動的擴散部分採用最低次混合元方法求解，以保證格式對未知函數及伴隨向量的同時高精度逼近。由於該方法中檢驗函數可取分片常數，此格式在某種意義上具有局部守恆性質。 -
In a reynolds number range of 150 < 6500, a particle image velocimetry ( piv ) is used to measure and visualize the 2d flow over a backward facing step
摘要利用粒子圖像測速技術（ piv ） ，對雷諾數150 < 6500范圍二維後向臺階的流動進行詳細觀測。 -
We also research the power flow calculation and reliability analysis of urban radial network, and a forward - backward sweeping method of power flow solution and a kind of reliability evaluation based on the minimal path method, are presented in this thesis
在前人研究成果的基礎上，提出了採用前推回推法計算配電網路潮流以及基於最小路的實用快速可靠性評估演算法.其中對于潮流計算，本文用c語言編制了相應的計算程序。 -
The content including : ( 1 ) according to the radial structure and multilayer characteristic of distribution network, a novel layer - by - layer backward / forward sweep method id developed. the branch power / voltage loss of the same layer can be parallel computed without relabeling buses and branches, that greatly increases the speed of load flow calculation
其主要內容如下： （ 1 ）針對配電網路的樹狀結構和層次特性，研究了一種新穎的分層前推回代潮流演算法，該演算法不需要網路節點和支路的特殊編號，可以并行計算同一層次所有支路的功率損耗和電壓損耗，從而大幅度提高了潮流的計算速度。 -
Two recent new england journal of medicine studies confirm preious findings associating pergolide with increased chance of regurgitation ( backflow of blood ) of the mitral, tricuspid, and aortic ales of the heart. ale regurgitation is a condition in which ales don ' t close tightly, allowing blood to flow backward across the ale
《新英格蘭醫學雜志》最近的兩篇文章證實了以前發現的有關培高利特增加心臟主動脈瓣、二尖瓣膜和三尖瓣血液迴流可能性。 -
A experimental study on the 2d time - average flow over a backward facing step via piv
二維後向臺階流流動特性的實驗研究 -
Two network analysis and operation algorithms for balanced radial distribution systems, called forward - backward sweeping method of power flow solution and real - time control of capacitors installed on distribution systems, are presented in this thesis. distribution networks have characteristics such as mesh network on planning and radial networks on operation. the radial topology of distribution networks has been fully exploited such that a systematic branch and node numbering scheme is utilized to achieve storage and computational economy
本文對配電網路中電壓的調整，就電容器投切控制問題進行了深入的研究，在前人研究成果的基礎上，針對配電網路結構特點，提出了採用前推回推法計算配電網路潮流，對配電網路就地補償電容器的控制採用模糊控制技術，對全局優化控制採用逐次線性規劃演算法。 -
Two schemes are processed in power flow computation. the first is forward - backward combined with compensation current
配電網潮流計算有輻射網和弱環網兩種情況。 -
Forward - backward method is usually used in radial distribution networks. in weakly meshed distribution networks compensation current method is used. it open the loops on some nodes, on the open points compensation currents are used to simulate the power flow before opening
其中之一是採用配網潮流計算中常用的前推回推法計算輻射狀網路潮流，對於弱環網的處理時採用補償電流法，其思想是將環打開，在開環處以一電流源模擬開環前的狀態。 -
Enterprise management information modernization is not simply using the computer to substitute for labor work, but making use of modern information technology to introduce modern management ideology and to lead to a complete innovation in the backward running model, deadlocked organization structure as well as the management flow at low efficiency
我國的企業要生存，要在競爭中領先，要使企業有長期的穩定和發展，必須實現企業信息化的目標。否則，我們很難趕上和超過國際的先進水平，也難以在國內競爭中處于站穩腳跟。 -
Intellect charge : the battery charger is using slice of flower to control charge that has constant current, constant voltage to charge, short current protection, turn lamps function and prevent to flow backward function
智能充電:充電器採用晶元控制充電，具有恆流，恆壓充電，過充保護，短路保護，轉燈功能，防倒灌保護功能。
分享友人