极坐标

AutoCAD及全站仪在极坐标法放样中的应用

Application of AutoCAD and Total Station Apparatus in polar coordinates lofting

基于VB的全站仪极坐标法实地放线程序设计方法研究

Research on Design Procedures for on-the-Spot Layout Program by GPS Polar Coordinates Methods , Based on VB

极坐标-直角坐标转换GPS坐标转换的三维分离回归模型参数的稳健估计

Three-dimensional Separation Regression the Model Parameters Robust Estimation Method of Transforming GPS Coordinate

一种改进的二维离散极坐标Fourier变换快速算法

An Improved Fast 2D Discrete Polar Fourier Transform Algorithm

移变模式下双站SAR极坐标格式成像算法研究

Polar Format Algorithm for Variant Airborne Bistatic SAR Imaging

任意凸轮曲线的极坐标式等速CNC磨削

Polar-coordinate Constant Velocity CNC Grinding of Arbitrary Cam Curves

极坐标数控编程技术研究与CAM系统的实现

The Research on the NC Programming Technology and the Implementation of the CAM System Based on Polar-coordinate

为了在普通PC机上实现计算机断层扫描（CT）快速重建，提出了利用查找表和极坐标反投影快速重建方法。

In order to realize CT fast reconstruction on an ordinary PC , a fast reconstruction process using look-up table and polar coordinate back-projection was presented .

极坐标系下谱元方法求解不可压缩Navier-Stokes方程

Spectral element method in polar coordinate for incompressible Navier-Stokes equations

双站合成孔径雷达成像波数域解决方案一种改进的极坐标波数域圆迹SAR三维成像算法

Wave Number Domain Solution for Image Formation of Bistatic SAR ; An Improved CSAR 3-D Imaging Algorithm in Polar Wavenumber Domain

基于极坐标的激光选择性烧结（SLS）快速成型系统的研究

Development of Selective Laser Sinter Rapid Prototyping System Based on Polar Coordinates

CTZ在聚束SAR极坐标格式成像算法中的应用

Application of CZT in Polar Format Algorithm of Spotlight SAR

构造极坐标中Airy应力函数的观察法

A direct method for constructing Airy stress function in polar coordinates

我不认为可以通过求R或θ的平均值，从而在极坐标系下找到重心。

No , I don 't think we could actually find the center of mass in polar coordinates by finding the average of R or the average of theta .

在第四章，我们结合算子T存在正的特征值与特征函数的性质，再次利用极坐标证明了一个H型群中无界域上的极大值原理；

In Chapter 4 , making use of the polar coordinates and the property that T has positive eigenvalue and eigenfunction , we establish a Maximum Principle on unbounded domains contained in H-type group ;

本文针对非完整约束移动机器人纯滚动无滑动这个约束条件，设计了一种在极坐标系下基于Lyapunov函数的全局渐进镇定控制器。

This dissertation aim at the constraint condition that " pure roll without slippage ", designed an asymptotically stabilizing controller based on Lyapunov function under polar coordinates .

基于尖角状角点附近的场分布特性，提出了应用极坐标系中的B样条有限元法求解尖角奇异边值问题。

Based on the distribution characteristic of fields in the neighbourhood of a sharp corner , the B spline finite element method in polar coordinates is exploited for solving the boundary value problems with singularities at the sharp corner .

采用Gabor滤波器获得频率特征，采用差图像获得结构特征，采用原图像和极坐标图像的奇异值获得不变量特征。

Multiple channels Gabor filters are introduced to extract frequency domain features ; SVD is applied to polar coordinates image to obtain invariant algebraic features .

为了更好地进行图像数字水印的识别，基于对数极坐标仿射（LPM），设计和应用了5种滤波器，即经典匹配滤波器、振幅滤波器、相位滤波器、双态相位滤波器和改进的滤波器。

Based on log polar mapping , five filters have been designed and applied in this paper .

在极坐标式CNC磨床上磨削封闭式凸轮轮廓曲线时，凸轮的半径变化率和砂轮的大直径成为影响磨削质量的主要因素。

The radius change rate of cams and the large diameter of grinding wheels are main factors to effect the grinding quality during grinding enclosed profile curves of cams on the polar coordinate CNC grinder .

证明了在球极坐标下，哈特曼势在维度r和维度θ都具有超对称性和形不变性，从而求得此势的能量本征值和能量本征函数。

This article shows that in spherical polar coordinates , the Hartmann potential has supersymmetry and shape invariance in the r dimension and in the θ dimension , and thus it obtains the energy eigenvalues and energy eigenfunctions of this potential .

接下来有个坏消息就是，不仅要会在xy坐标系里做，还要会在极坐标系里做。

So , the bad news is we have to be able to do it not only in xy coordinates , but also in polar coordinates .

介绍了任意站极坐标法测设线路平面曲线中桩和边桩的原理，推导了中桩和边桩坐标计算的数学模型，并用VISUALBASIC编制程序实现之。

The paper introduces the principle of laying out railway horizontal curve by using polar coordinate method at arbitrary point , and concludes the mathematic models of middle stake and side slope stakes ' coordinate calculations . It has been realized by designing program on Visual Basic .

球坐标中的平面也差不多是这样了，只要把rz看做极坐标就行了。

That 's in line with the idea that we are just doing again , polar coordinates in the rz directions .

然后重点对三种聚束式SAR成像算法进行了讨论与比较，包括极坐标格式（PF）算法、线性调频测绘（CS）算法和距离走动（RM）算法。

Then three spotlight mode SAR imaging algorithms are discussed and compared , including polar format ( PF ) algorithm , chirp scaling ( CS ) algorithm and range migration ( RM ) algorithm .

对基于全局的图像检索，建立的图像特征包括：颜色描述子，图像ROB的三色平均值和分布中心值，以及利用傅氏极坐标变换得到的能量分布描述子。

In whole image retrieval , established features include a color signature , the mean values and center points of color R. G. B. , an energy-distribution signature by Fourier polar transform .

对数极坐标变换（LPT）与离散傅里叶变换（DFT）相结合的方法（LPT-DFT）具有旋转和尺度不变性。

The combination of log-polar transform and Discrete Fourier Transform ( LPT-DFT ) has the prosperities of scale and rotation invariance .

在极坐标下分析采矿车位姿误差，选用合适的状态变量，设计一种点镇定控制律，并采用Lyapunov函数法分析系统的稳定性。

In polar coordinates , posture error is analyzed , a control law with appropriate state variables for point stabilization is put forward , and Lyapunov function method is used to analyze the stability of the system .

然后我要返回一些值，我认为在极坐标的形式下我说过，如果，我在这里做了什么来着，我说过，对，再说一次，如果x和y坐标。

And I think in the polar one I said , if , what did I do there , I said , yeah , again if the x and y are greater than the other one , I 'm going to return them to it .

最后提出了两种基于二维CAD工程图的半脆弱水印算法，并详细讨论了算法性能。（1）提出了一种基于极坐标映射的二维CAD工程图半脆弱水印算法。

Finally , two semi-fragile watermarking schemes for 2D CAD Engineering graphics are proposed , and their performance are discussed in detail in this thesis . ( 1 ) A semi-fragile watermarking algorithm for authenticating 2D CAD engineering graphics based on log-polar coordinates mapping is proposed .