協變坐標 的英文怎麼說
中文拼音 [xiébiànzuòbiāo]
協變坐標
英文
covariant co ordinate-
Because geometry of formation of two satellites is very weak, the solution covariance is very big and unstable in order to resolve this problem, the measurement model was transformed from cartesian coordinate system to sphere coordinate system
由於雙星編隊星座觀測的幾何結構弱，所以解算參數的協方差不穩定。為了解決這一問題，對測量方程進行球坐標變換。Abstract : it is observed that the sommerfeld ' s formula for a progressive spherical wave is not covariant with respectro the rotation of the coordinate system. it contains complex partial waves that are not physical. the standing wave representation of the same formula is shown to be covariant and physical. it is applied to solve the boundary value problem of fiber optics. the radiation modes as well as the guided normal modes are obtained in closed forms. the intensity distribution in various modes is obtained. it is remarked that the mode of critical refraction is missing
文摘:說明了球面行波的索末菲公式在坐標轉動下不協變.證明了球面波的駐波表示是協變的，因而是一個物理的關系式，故適用於圓柱坐標中各類波動方程的定解問題.作為一個例，應用於光纖光學，導出了受導簡正模和輻射模的表達式，以及各模式的強度分佈( 3 ) study deeply the structure of fat 16 file system and the characteristic of flash disk, and develop the file management software of flash disk to manage nc files effectively according to the management idea of fat 16 file system. ( 4 ) research the module and protocol of reliable communication in serial network, which are composed of arm main control board, dsp motion control board, keyboard board, i / o control board and encoder signal collection board, and then develop communication software of the serial network. ( 5 ) study the principle of displaying char in lcd and the method of embedding font library into operating system, and research deeply the method of embedding chinese font library into os in the light of the characteristic of chinese
本論文的主要研究內容如下： （ 1 ）研究uc os -實時嵌入式操作系統在硬體平臺上的移植及其佔先式內核的任務調度原理，合理分割銑床控制系統的管理任務，根據任務的要求賦予不同的優先級和調度時間，保證任務的執行效率和實時性； （ 2 ）開發底層設備驅動程序和應用程序介面（ api ）函數，以便於進行系統應用軟體的開發； （ 3 ）深入研究fat16文件系統的結構和固態盤的硬體特性，參照fat16文件系統的管理思路，開發固態盤文件管理軟體以有效管理nc代碼文件； （ 4 ）深入研究由arm主控板、鍵盤板、 i o控制板、編碼器信號採集板等裝置組成的串口通訊網路可靠通信的模型及其通訊協議，開發串口通訊網路通信軟體； （ 5 ）研究字元的顯示原理和在操作系統中嵌入字庫的方法，在此基礎上結合漢字的特性深入研究中文字庫的嵌入方法，開發中文字庫嵌入軟體，滿足開發操作界面的信息要求； （ 6 ）深入研究三維圖形坐標變換的原理，開發實用的三維加工軌跡顯示軟體，便於操作者對零件的加工過程進行監控和診斷。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。A new four - node axisymmetric element ach8 is derived based on the combined hybrid variational principle, which uses wilson ' s displacements and linear stress suffering from energy compatibility. the resulting element exhibits excellent results in displacements and stresses and is suitable for nearly incompressible materials without any locking phenomena, insensitive to mesh distortion
本文首先基於組合雜交變分原理推導出4節點的軸對稱元ach8 ，其位移插值採用wilson非協調位移模式，應力在等參坐標系下採用關于wilson位移完全能量協調的不完全線性多項式。Via the transform of coordinate, mode iii crack problem in physical plane is inversed to stress plane to be investigated. equilibrium equation and compatibility equation are deducted, in which ( x, y ) is expressed by unknown variable 7 ^, 7 ^,
通過坐標變換，將物理平面中型裂紋問題變換到應變（應力）平面中加以研究，推導出用（ _ x ， ， _ y ）為未知變量表示（ x ， y ）的平衡方程和協調方程。分享友人