矢多邊形 的英文怎麼說
中文拼音 [shǐduōbiānxíng]
矢多邊形
英文
vector polygon-
In short, vector data take the simplest topological entities - points, lines, and polygons - and anchor them within a 2 - d cartesian coordinate system to describe geographical features
簡言之，矢量數據利用最簡單的拓撲實體點、線和多邊形，並在二維笛卡爾坐標系統中固定它們來描述地理特徵。Firstly, in spherical coordinate system, the sovp formulation for the time - harmonic electromagnetic fields of the current dipole in conductive infinite - space is derived, using reciprocity theorem and transforming relations between special functions. then, selecting appropriate coordinate system, using superposition principle, the boundary - value problem of modified magnetic vector potential on the problem of a time - harmonic current dipole in spherical conductor is solved and analytical solution is obtained. finally, by means of the addition formulas of legendre polynomial and spherical harmonics function of degree n and order 1, the analytical solution in spherical coordinate system specially located is transformed into that in spherical coordinate system arbitrarily located
首先利用特殊函數間的轉化關系和互易定理推導得到了無限大導體空間中球坐標下時諧電流元電磁場的二階矢量位形式：然後利用疊加原理，選擇合適坐標系，求解了導體球中時諧電流元的修正磁矢量位邊值問題，得到了問題的解析解；最後依據不同坐標系下電磁場解的轉化原理，藉助勒讓德多項式和n次1階球諧函數的加法公式，將坐標系特殊安放時的電磁場解析解變換到坐標系一般安放時的解析解，給出了球內電場和球外磁場的並矢格林函數。The parametric speed of the curve is firstly approximated by the bezier polynomial which takes the lengths of control polygon ' s edges of the direction curve of normal as bezier coordinates. then the corresponding geometric offset approximation algorithm is given. moreover, an offset approximation with high precision is obtained by degree elevation of the direction curve of normal
首先利用以法矢方向曲線的控制多邊形邊長為b zier縱標的b zier多項式來逼近曲線的參數速度，給出了相應的幾何等距逼近演算法，進一步結合法矢方向曲線的升階獲得了高精度逼近The system uses the permanent magnet synchronous machine as the driver motor based on the idea of polygonal flux linkage locus and the permanent magnet brush - less motor is as the momentum balance motor by means of speed and current loop in order to track driver motor precisely and rapidly. the harmonious control of driver motor and balance motor is realized by making full use of the dsp hardware resource and complicated programmable logic device. the software design is composed of c and assembly language to realize motor control arithmetic of polygonal flux linkage locus
衛星天線伺服控制系統以正弦波永磁同步電機作為驅動電機，採用多邊形磁鏈軌跡法（電壓空間矢量法）的控制策略；動量平衡電機採用永磁無刷直流電機，通過電流環、速度環達到快速、精確跟蹤驅動電機的目的，確保了衛星姿態恆定；設計方案中充分利用了dsp硬體資源和復雜邏輯陣列實現了驅動電機和平衡電機的協調控制，並通過c語言和匯編語言的混合編程實現了電機的多邊形磁鏈軌跡控制演算法。We discuss the influence on the flux and torque when the multi - voltage space vector is applied on the motor. then the strategy of producing hexagon flux or circle flux is proposed. it is believed that, in order to control the torque optimally in dtc system, the stator current needs to be observed predictably
論文在闡述異步電動機的直接轉矩控制原理的基礎上，詳細分析了多電壓空間矢量對磁鏈和轉矩的影響，給出了六邊形磁鏈和圓形磁鏈以及定子電流預測的設計方法，提出了一種新的轉速環控制方法。In this paper, the method of dividing circle rotating magnetic field into polygonal step magnetic field and the step orientation characteristic of space rotating vectors are researched
本文研究了由圓形旋轉磁場離散為多邊形步進磁場的離散方法和空間旋轉矢量的步進定位特性。Thirdly, it utilizes line tracking and douglas - peucker line - simplification algorithm to realize the raster - to - vector conversion. a triangulated irregular network ( tin ) is constructed based on vector data, and dem point - array data is computed by interpolating grid on tin
第三，使用輪廓線跟蹤演算法和dpl多邊形近似方法實現等高線數據的矢量轉換;並基於等高線矢量數據建立不規則三角網，再內插格網生成dem點陣數據。Abstract : basing on the introduction of brim - vector and face - vector, by means of analogy, the paper popularizes the cosine - theorem from flat - triangle to vacuum - polygon and arbitrary - polyhedron, concludes a series of generalized cosine - theorems which have symmetric and conformable form, and presents short and strict proof
文摘:在引入邊矢量及面矢量概念的基礎上，以類比作為手段，對餘弦定理進行由平面三角形到空間多邊形乃至任意多面體的一系列推廣，得出了形式對稱一致的一組廣義餘弦定理，並給出了其簡捷嚴謹的證明。H. 264 iso iec 14496 - 10 avc. itu - t sg16 q. 6 vceg and iso iec jtc 1 sc 29 wg 11 mpeg, jvt - g050r1, may 2003, pattaya. 3 li r, zeng b, liou m l. a new three - step search algorithm for block motion estimation
為了降低運動估計的復雜度，研究者們已經提出了很多方法，例如三步搜索演算法，基於塊的梯度下降演算法，鉆石型搜索演算法，六邊形搜索演算法，這些演算法都基於這樣一個假設:離起始搜索點越近，越有可能搜索到最佳運動矢量。Effective scanning line algorithm was designed ; divided scan path was used, and extract scanning line vector to area filling. it can be concluded that this algorithm increases manufacturing velocity and accuracy
文中設計了有效的掃描線與多邊形邊的求交演算法，保證了交點的正確配對；採用分區域掃描策略，提取同區域的掃描矢量完成了掃描，使成型速度與精度都有所提高。分享友人