polar coordinate 中文意思是什麼

polar coordinate 解釋
極坐標系統
  • polar : adj 1 （南、北）極的，地極的；近地極的。2 【物、化】（有）極的；磁極的；有磁性的。3 【幾】極線的...
  • coordinate : adj 1 同等的，同位的；協調的，配合的；【語法】對等的。2 【數學】坐標的。3 （圖書、資料編目）交叉...
  1. Since pixel - level contrapose pixel coordinate, trigonometric function must be used to translate polar coordinates to pixel coordinate when the curve is described by polar coordinate. so research is very little on algorithms for generating this sort of curve by now

    由於逐點是針對象素坐標系而言，而對極坐標系下描述的曲線，在轉換到象素坐標系時要用到三角函數運算，因此目前很少提到對極坐標曲線生成演算法的研究。
  2. Firstly, this paper designs a polar coordinate barotropic vorticity equation semi - spectral model and a quasi - geostrophic grid model in order to research the propagation of vortex rossby waves and tropical cyclone intensity change entirely

    本文首先設計了一個極坐標系正壓渦度方程的半譜模式、一個準地轉格點模式對渦旋rossby波傳播和熱帶氣旋強度變化進行了較為系統的研究。
  3. The paper abstracts out the palmprint mainline characteristic owing to palmprint image gradation by the gray value characteristic property method, defining the online palmprint characteristic space with the form of the polar coordinate and compressing the dimension, at last we use the neural network to accomplish the design of identification authentication system with the on - line palmprint as the mating algorithm. based on this, a fast and reliable system of identification authentication can be built

    採用基於掌紋圖像灰度特性的方法提取出掌紋的主線特徵，以極坐標的形式定義在線掌紋的特徵空間並降維處理，最後用神經網路作為匹配演算法完成在線掌紋身份驗證系統的設計，以此為基礎建立了快速、可靠的新型身份認證系統。
  4. Polar coordinate plane

    極坐標平面
  5. Polar coordinate type potentiometer

    極坐標式電位差計
  6. The properties of the key optical and electrical devices and the controlling mode in the system are put forwards. using the polar coordinate lines with different directions and the circulars with the same axis can be written together. by using he - cd laser ( 442nm ) as writing light source, the system can directly write line with width 05 # m on a sample

    本文的主要目的是建立了一種極坐標和直角坐標相結合的激光直寫系統的原理樣機，探討系統的各部分器件的基本性能要求，為今後研製高精度激光直寫系統做好工作基礎，分析了激光直寫系統中關鍵器件的性能要求，基本控制方式，實現了極坐標方式下，任意旋轉角度直線圖形與共心圓環的光刻。
  7. First, proper initial conditions between ekv and target are the premise of hit - to - kill. capture region is described by equations of relative motion defined in modified polar coordinate while phasetrajectory graph is introduced. and the disturbance of initial condition biase is analyzed by cadet through statistical linearization of ekv dynamical model

    本文在修正極點坐標系中建立攔截器和目標之間的相對運動方程，結合相平面軌跡圖，分析了大氣層外動能攔截器的攔截區;對大氣層外動能攔截器動力學模型進行統計線性化，採用協方差分析描述函數法，分析了初始狀態誤差對彈道的影響。
  8. Fitts " law was extended to two - dimensional polar coordinate system, and based on this, a method on human movement quality evaluation was proposed. indices of gait symmetry, indices of difficulty and indices of performance for human upper limbs were defined and combined with other indices to form a set of systematic indices of movement quality evaluation

    將fitts定律推廣到二維極坐標下，並以此為基礎建立了矢狀面內的人體運動質量評定方法，定義了上肢運動的難度指標、執行度指標和下肢運動的對稱性指標，提出了一套能反映運動質量各方面情況且具有普遍意義的運動質量評價指標。
  9. Application of the polar coordinate method in the design and measurement of curves

    極坐標法在曲線測設中的應用
  10. A discretization equation is derived by using a finite volume method in three - dimensional cylindrical polar coordinate system. algebraic equations are solved by iteration with a line - by - line method that is a combination of tdma in axial and radial directions, ctdma in tangential direction and adi method in three directions. the pressure and velocity coupling are solved with the simple algorithm

    在三維圓柱坐標下，利用有限體積法推導離散方程；在軸向與徑向用三對角矩陣法（ tdma ） ，在周向採用循環三對角矩陣法（ ctdma ） ，採用交替方向亞鬆弛疊代法（ adi ）求解方程；推導同位網格下的壓力修正方程，用simple演算法處理速度與壓力的耦合；為加速收斂，採用適當的鬆弛因子。
  11. In order to satisfy the demands of the main pylon measure benchmark stakingout and the cable anchor - pipe positioning for cable - stayed bridge, a new georobot relative datum 3d polar coordinate method is presented

    摘要結合斜拉橋索塔基準放樣及斜拉索預埋鋼管的精密定位的需要，提出了一種新的基於測量機器人的三維相對基準放樣方法，並成功用於灌河特大橋斜拉橋主橋的施工放樣。
  12. This paper investigates the two interrelated problems from the following two parts : first part, a polar coordinate quasi - geostrophic barotropic model, a cartesian coordinate quasi - geostrophic barotropic model, a quasi - geostrophic baroclinic model, and a quasi - geostrophic barotropic vorticity model under the condition of non - stationary typhoon circulation are designed within the framework of advection dynamics, and systematically dynamic studies on effects of different physical processes on the intensity of typhoons are conducted

    研究內容分兩個部分。第一部分，在平流動力學框架內設計了一個極坐標準地轉正壓模式、一個直角坐標中準地轉正壓模式、一個準地轉斜壓模式、以及一個非定常臺風環流條件下準地轉正壓渦度模式，對引起臺風強度變化的不同物理過程進行了較系統的動力學研究。
  13. In our approach, the approximated center of object is selected from the references images and a polar - coordinate system is set up for the object

    該演算法充分利用了極坐標表示的簡潔，將三維求交重建運算轉化到球面上，獲得了較高的建模效率。
  14. In this paper a method named inside control in concert with polar coordinate to resolve the problems was presented and demonstrations were given to show how it works

    本文提出了一種檢測柱體垂直度的方法?內控法配合極坐標法，並用實例加以說明。
  15. Polar coordinate transformation

    極坐標轉換
  16. This is a single step process and comparatively cheaper and faster than lithography. the laser direct writing system with polar coordinate and cartesian coordinate is described in this paper

    激光直寫系統要求的器件的精度非常高，我們目前的工作目標是首先實現激光直寫系統的基本功能，在此基礎上，再進行高性能系統的研製。
  17. The contents of the course include the elastic problems and associated solution procedure ; the basic concepts and assumptions of elasticity ; the solution of a planar elastic problem defined in a rectangular coordinate ; the matrix expression of basic equations of a planar elastic problem ; the solution of a planar problem defined in a polar coordinate ; the basic equations and solution procedure of a three - dimensional elastic problem ; bending of a plate ; and the variational principles of energy

    本課程的主要內容包括:彈性力學問題及其求解思想;彈性力學中的基本概念及基本假定;彈性力學平面問題的直角坐標解答;平面問題基本方程的矩陣表示;平面問題的極坐標解答;彈性力學空間問題的基本方程及其解法;薄板的彎曲;能量變分原理等等
  18. Governing equations of a modified k - model is derived in a three - dimensional cylindrical polar coordinate system, and an available equation is produced

    首先給出單相螺旋流流場在三維圓柱坐標下的修正-湍流模型的控制方程，得出控制方程組的通用形式。
  19. Then, the minimum circumscribed circle and shape principal orientation of the object region are calculated ; and the object region is divided into some blocks in the polar coordinate, which uses the center of the minimum circumscribed circle as the origin and the direction of the shape principal orientation as the direction of the polar axis, and the features of all subblocks are extracted to compose shape histograms and then smoothed ; then, combined with global features to synthetically represent the content of the image ; finally, a new image similarity is used to compute the distance between images

    首先對商標圖像進行預處理，得到規則二值圖像;計算目標像素的最小外接圓和圖像的形狀主方向;在以最小外接圓圓心為原點、形狀主方向為極軸方向的極坐標中將圖像分塊，提取各子塊特徵，構成形狀直方圖並平滑處理;再結合全局形狀特徵來綜合表示圖像內容;最後採用新的相似性度量方法計算圖像間距離，實現商標圖像的準確檢索。
  20. This paper proposes a subblock - based image retrieval method under the polar coordinate system for retrieving trademark image. after preprocessing the trademark image, the regular binary - image is obtained

    針對現有的四叉樹分塊方法的不足，提出了一種極坐標下的分塊檢索方法。
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