線坐標 的英文怎麼說
中文拼音 [xiànzuòbiāo]
線坐標
英文
line coordinates-
They form a three-parametric, orthogonal net and may be chosen as coordinate lines of a special, curvilinear coordinate system.
它們形成三參數正交網，可以把它們選作特殊曲線坐標系的坐標線。Body - fitted curvilinear coordi - nates
貼體曲線坐標Pursuit - evasion barrier of two spacecrafts based on the sightline coordinate system
空間飛行器在視線坐標系中的追逃界柵Numerical simulation of two - phase turbulent combusti on flow in an afterburner under generalized nonorthogonal curvilinear coordinate systems
非正交曲線坐標系數值模擬加力燃燒室湍流兩相流燃燒A normal transform is introduced, and there are enough much grids in the region between the critical layer and the wall, where the variation of the disturbance is the quickest. the finite - difference of governing equations with fourth - order accuracy in the normal direction is utilized in full regions including points close the wall, and is very important for accurately discreting equations. the combination of global and local methods is implemented, and a new iterative formula is derived
對于曲線坐標系下的拋物化穩定性方程，文中發展了求解的高效數值方法:引進法向變換，使得在臨界層與壁面之間的擾動量變化最快的區域有更多的法向網格點;導出包含邊界鄰域在內的完全四階精度的法向有限差分格式，這對方程精確離散至關重要;採用全局法和局部法相結合的方法及其新的迭代公式，大大加速收斂並得到更精確的特徵值。This method is realized by sending and receiving messages among graph managed object, tunnel set object, joint set object and tunnel objects and joint objects
通過圖形管理對象、巷道集合對象、節點集合對象，巷道對象和節點對象之間相互發送和接收消息來實現雙線坐標計算的自動實現。On circular curved line coordinate and its layout method
解析圓曲線坐標及其放樣方法By use of the relationships between the hermite polynomial and the laguerre polynomial, the eigenequations of one - dimensional harmonic oscillator and hydrogen atom are conversed into the same equations in form. therefore the relationships between energy levels and wave functions of one - dimensional harmonic oscillator and hydrogen atom are found. through the coordinates transform, the relationships between energy levels and wave functions of two - dimensional harmonic oscillator and hydrogen atom are found
首先綜述了諧振子與氫原子的基本理論的研究現狀，並在此基礎上對諧振子與氫原子的關系展開了研究，通過厄密特方程與拉蓋爾方程的相互轉化，將一維諧振子與一維氫原子的本徵值方程轉化為相同形式的方程，從而比較得出它們能量及波函數間的關系，並通過坐標變換將直角坐標系下二維氫原子的本徵值方程轉化成與曲線坐標系下二維諧振子的本徵值方程相同的形式，從而得出二維氫原子與二維諧振子的能量及波函數的關系。Based on the review, the fluid flow and heat transfer in the curved circular and rectangular pipes have been researched by employing perturbation method and numerical simulation with a physical model under the rotational orthogonal curvilinear coordinate in a rotating curvilinear pipe with multi - parameters. we firstly analyzed the fully developed fluid flow and heat transfer, mixed convection heat transfer, the development of flow and heat transfer in the inlet in different cross section ( circular, elliptical, annular and rectangular crossection ). the variations of the secondary flow, axial velocity, distribution of temperature, the friction force on the wall, the ratio of friction factor as well as the nusselt number with different dimensionless parameters had been examined in detailed
本文在總結和分析了一個世紀以來有關曲線管道流動和換熱特性的研究成果的基礎上，以旋轉正交曲線坐標系統下的多參數旋轉螺旋管道中的對流傳熱為物理模型，通過攝動方法和有限體積法，首次對各種截面（圓截面、橢圓截面、環形截面、矩形截面）旋轉曲線管道內充分發展流動的流動結構和傳熱特性（包括耦合對流傳熱特性）以及旋轉曲線管道開口段發展流動的流動結構和換熱特性進行了系統的數值模擬和理論分析，詳細討論了各種無量綱參數對管道內軸向速度分佈、二次流結構、溫度分佈、壁面摩擦力、摩擦系數比以及管道nusselt數的影響，獲得了若干創新性成果。Theory analysis and experimental simulations of pursuit - evasion problem with maneuvering target in sight coordinate system are performed using the two methods
並應用這兩種方法針對視線坐標系的兩空間飛行器在目標機動下的追逃進行了理論推導和實驗模擬。In arbitrary curvilinear coordinate systems, three dimensional turbulent combustion flow fields of the three kinds of turbofan engine afterburner with the longitudinal heat shield 、 outer cold flow and the jet nozzle are simulated. the three - dimensional body - fitted grids are generated by an elliptical grid generation procedure and zone method
本文在任意曲線坐標系統下對三種帶有縱向隔熱屏、外冷卻通道和尾噴管的渦扇發動機加力燃燒室的三維紊流燃燒流場進行數值模擬。First, the fundamental theory of the basic fdtd method and its application in the analysis of the electromagnetic properties of infinite planar periodic structures is summarized. the basic ideas of the auxiliary fields fdtd method is expressed and generalized to the situations of the 2 - d periodic structures, to lossy media, and to the curvilinear coordinate. the shortcoming of this method in the management of conformal grids is pointed out
首先總結了fdtd方法的基本理論及其在周期性結構電磁特性分析中的應用，闡述了輔助場fdtd方法的基本思想，把它推廣到二維周期性的情況和計算區域為有耗媒質的情況，再進一步推廣到曲線坐標系中，並指出了該方法在網格共形處理中的不利之處。Abstract : variations of flow pattern, flow velocity in deep poo l and side bar, mainstream thread, and water surface, caused by excavation project, are investigated by two - dimensional mathematical model in an orthogonal curvili near coordinate system. the change of bed - load transport rate, and redeposition r ate are predicted. the influences of the excavation project on navigation are ana lyzed. grid - type and flat - type excavation alternatives are proposed and discuss ed
文摘:採用正交曲線坐標系下的河道平面二維數學模型，研究了嘉陵江何家磧邊灘采砂后河道流勢、流態、灘槽流速、主流位置、水面高程及比降的變化規律，預測了采砂方案完成後卵石推移質輸沙率變化及其對航道的影響，並對格形開挖和平整開挖方案進行了比較分析This work can be summarized as follows : 1 ) we define several reference frames, including earth reference frame, radar reference frame, target reference frame. then, we give the conversion relationships on the basis of introducing the model of the conversion model
本文的主要工作如下: （ 1 ）完成了在模擬系統中用到的雷達視線坐標系、速度坐標系和目標坐標系的定義，在介紹坐標系轉換模型的基礎上給出了各個坐標系之間的轉換關系式。The new algorithm starts from an initial estimate which is based on the hough transform, and a rectangular window is centered using the current line approximation, and a new line estimation is generated by making a total least squares fit through the pixels contained within the window. this is repeated until convergence is reached. lastly, we have suggested a new technique which may recover the motion and structure parameters of a moving object by using of 21 optical flow lines based on the optical flow fields of the feature line this thesis is the project supported by aeronautical foundation science ( no. 99f53065 ) and research center of measuring and testing technologies, and control engineering in nanchang institute of aeronautical technology ( no. 2001 - 15 )
演算法的思路是：首先，在小區域內運用霍夫變換確定直線的初始值；其次，以直線的初始值所對應的直線為中心線，建立一個矩形框；最後，利用矩形框內所包含的邊緣點數據不斷地迭代直至收斂，從而達到進一步修正直線的坐標參數；本文基於特徵直線的光流場，即線流場，建立了一種利用21條光流線確定空間三維物體旋轉運動參數、平移運動參數以及對應的空間直線坐標的線性演算法。By procceding from the all - gaseous state navier - stokes equation and using eno difference scheme, the limited cold - flow jets produced by ignitors are numerically simulated in srm chamber. then the flow field structure and characteristics are analyzed
從曲線坐標下的完全氣體n - s方程出發，採用eno差分格式，對點火發動機工作初期，在固體火箭發動機內腔形成的受限冷噴流流場進行數值模擬;在此基礎上，分析了噴流的流場結構及特性。Abstract : by procceding from the all - gaseous state navier - stokes equation and using eno difference scheme, the limited cold - flow jets produced by ignitors are numerically simulated in srm chamber. then the flow field structure and characteristics are analyzed
文摘:從曲線坐標下的完全氣體n - s方程出發，採用eno差分格式，對點火發動機工作初期，在固體火箭發動機內腔形成的受限冷噴流流場進行數值模擬;在此基礎上，分析了噴流的流場結構及特性。We consider all kinds of plane line representations of a plane line, and a simple and practical line coordinate system is suggested. we also present a new 3 - d line representation model. the new representation model is based on the geometry theory : the intersection of two arbitrary planes in the 3 - d space is a line in a plane
本文提出了直線坐標的概念，通過分析各種平面直線的表示方法，提出了一套簡單而實用的直線坐標表示方法，提出了一種新的空間三維直線表示法，這種表示空間三維直線方法是根據空間相交兩平面一般交於一條空間直線的思路而提出的。Using matrix as a powerful mathematical tool, we present the description of a particle ' s motion in general curvilinear coordinate system
摘要利用矩陣這一強有力的數學工具，給出了一般曲線坐標系下質點運動的描述。Go a step further, beginning with the relation of the general curvilinear coordinate system and its corresponding reciprocal base, we derived the description of the particle ' s motion in the reciprocal base, and the covariant components of the particle ' s motion were obtained as well
進一步地，從一般曲線坐標系與其對應倒基的關系出發，導出了一般曲線坐標系對應倒基下對質點運動的描述，並進而給出了質點運動對應的協變分量。分享友人