1) Douglas curvature
Douglas曲率
1.
Finally we get an additional formula is obtained which is used to calculate Douglas curvature of(α,β)-metric.
最后还得到了计算(α,β)度量Douglas曲率的一个计算公式。
2.
Using Maple programme,we figure out the geodesic coefficients and the mean Cartan torsions of (α,β)-metrics in the third part; We discuss con-ditions of F = αe~kβ/α metric to be Berwald, Douglas, Projectively flat, and get an additional formula which is used to calculate Douglas curvature in the fourth part; On the basis of introducing generalized isotropic Berwald cur.
第四部分讨论了F=αe~(κ(β/α)度量成为Berwald度量,Douglas度量,射影平坦的条件,并得到了一个计算Douglas曲率的另一个计算公式。
2) Curve Douglas Binarytree
弯曲Douglas二叉树
3) Curvature
[英]['kɜ:və,tʃʊə, -tʃə] [美]['kəvə,tʃʊr, -tʃɚ]
曲率
1.
An Evaluation Method for the Roundness Error Based on Curvature;
圆度误差评定的曲率法研究
2.
Study of contact force between drill string and borehole wall in constant-curvature wellbores;
等曲率井眼中钻柱与井壁间接触力分析
3.
Curvature line and curvature characteristics of developable surface;
可展面的曲率线与曲率特征
4) curvity
曲率
1.
The practice of predicting natural fracture zones in deep formation in An Peng oilfield indicates that the extremum main curvity method has definite reliability in predicting pull apart fractures of homogeneous terranes.
安棚油田深层系预测天然裂缝发育带的实践表明 ,极值主曲率法在结构均一岩层构造拉张裂缝的预测中具有一定的可信度。
2.
The experimental data has proved that the method can be fit for the shaft with small curvity, especially in straightening the axis in auto′s gearbox.
实验表明此方法适用于初始弯曲曲率较小的轴类零件单步精密校
3.
A computing method is presented for studying the bending moment, axial force and curvity relationship at the section of prestressed concrete beam.
提出预应力砼截面弯矩－轴力－曲率关系的计算方法，并计算了不同预应力度下截面的弯矩－曲率关系。
5) curvatures
曲率
1.
Confidence Regions in Nonlinear Reproductive Dispersion Mixed Models in Terms of Curvatures;
非线性再生散度随机效应模型参数置信域的曲率表示
2.
Then the curvature of the points is estimated and the points with maximum curvatures in a set of close points are located as the true corners.
首先提取出汉字图像的轮廓曲线,然后利用Freeman链码给轮廓曲线编码,根据判断准则,提取出必是拐角点的点与可疑拐角点,最后估算可疑拐角点的曲率,挑出每组临近可能拐角点中曲率最大的点为真实拐角点。
6) bending curvature
弯曲曲率
1.
A cetain value,a method to analyze bending sensing rules of long-period fiber grating(LPFG) according to bending curvature,grating length and grating period was reported,based on coupled-mode theory and perturbation approximation.
基于耦合模理论和微扰近似,研究了长周期光纤光栅(LPFG)弯曲传感特性与弯曲曲率及光栅结构参数(光栅长度和栅格周期)之间的关系。
2.
A method to analyze the resonant wavelength and damping decrement of the transmission spectrum of long period fiber grating (LPFG) with bending curvature was reported.
报道了一种分析长周期光纤光栅(LPFG)透射谱谐振波长和衰减率随弯曲曲率变化的方法。
补充资料：Gauss曲率
Gauss曲率
Gausaan curvature
是曲面的第二基本形式(别x幻nd仙劝雀比正”tal form)，则Gau邓曲率能用公式 乙N一MZ K=共共一二鉴广 EG一F名来计算.Cau骆曲率恒等于球面映射(sPh汀i。习n.p)的J出刀bi行列式: S {K{尸。一J淤。于，这里P0是曲面上一点，s是包含P0的区域U的面积，S是U的球面象的面积，d是区域的直径.〔抽以弥曲率在椭画点(elliPtic Point)处是正的，在双曲点(hyPer加lic point)处是负的，在抛物点(para加licpoint)或平坦点(血t point)处为零，它可仅用第一基本形式的系数及其导数来表示(C明‘定理(CaJ骆th印rer。))，即 !EE云l {11}己F_一G K二，鑫夕}。。刀}十二节二‘飞二电-二石;一J‘+ 八一百丽矿}户’户。户。{’Zw!日。W }G民仅1 占F一E_〕 +—~-之址-一-一一二). 日v WJ’这里 WZ二EG一F2. 因为Ga璐曲率仅依赖于度量，即仅依赖于第一基本形式的系数，所以Gauss曲率在等距形变(士自m曰t幻n，ison犯山c)下是不变的.Ga口弱曲率在曲面论中起了特殊的作用，有许多关于它的计算公式(【21). 此概念由C.F.CaJ粥({11)引人，因而得名，【补注]全〔治毯骆曲率(to回Gauss枷curvat侧旧)(常简记为全曲率(to回cur呢lture))是指量 丁丁Kdo.(亦见Ga旧一D刀留峨定理(Ga理洛~B幻nnet小印n万n).) 对由x=x(s)所给出的光滑空间曲线C，C的总曲率K定义为C的球面象的长度(亦见球面标形(sPheri以1 indi口trix))，且能用沿C的关于Fr加以标架(见E滋.时三棱形(Fr乙nettri比过ron))(x，e.，e2，e3)的F滋.时公式(Fr‘netfomllllas)e，=‘，eZ，e;=一‘、e、+凡2e3，e3=一‘Ze:表示为 K一丁、lds.沈纯理译Ca.沼曲率【C.旧幽mo口，.to比;raycco皿Ic钾皿3.a〕，曲面的 正则曲面在一给定点的主曲率(prilldPal。印口.tl此)的乘积，若 I=dsZ=EduZ+2 Fdudy+GdvZ是曲面的第一基本形式(际tft田d旧lrntal forTn)及 11=侧“2+ZMdudy+Nd砂2
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