normal vector of a surface 曲面的法线矢量 normal to a surface 曲面的法线,表面的法线 normal vector 标准矢量 surface normal 曲面法线 normal surface 垂直面,正交面 normal curvature vector 法曲率向量 outer normal vector 外法线向量 outward unit normal vector 外向单位法向向量 spacelike normal...
Definition: If T is the unit vector of a smooth curve, the curvature function of the curve is κ=|dTds|. 曲率的意义是曲线扭曲的程度,如图,直线“不曲”,因此曲率为0. 曲率越大,曲线就越弯。 曲率的计算方法:一般情况下,用定义是不方便计算 κ 的值的,所以我们找一个更简单的方法,用chain rule...
normal vector [英]ˈnɔ:məl ˈvektə [美]ˈnɔrməl ˈvɛktɚ法向矢量，标准矢量 [例句]The equation of a plane in 3d space is defined with normal vector ( perpendicular to the plane ) and a known point on the...
Let X be an observation from a p-variate normal distribution (p ≧ 3) with mean vector θ and unknown positive definite covariance matrix Σ. It is desired to estimate θ under the quadratic loss L(δ,θ,Σ)=(δθ)tQ(δθ)/tr(QΣ), where Q is a known positive definite matrix. Es...
matrix–vector productA novel algorithm is described for multiplying a normal equation matrix by an arbitrary real vector using the fast Fourier transform technique during anisotropic crystallographic refinement. The matrix–vector algorithm allows one to solve normal matrix equations using the conjugate-...
-Constructing a unit normal vector to a surface _ Multivariable Calculus _ Kh 多元微积分,搬运自Khan Academy。 Grant讲解,链接https://www.khanacademy.org/math/multivariable-calculus
The essentially 3-dimensional nature of the spatial vectorcardiogram (sVCG) requires that it be studied as a vector sequence in space, and not merely in its projections on the arbitrary frontal, sagittal, and transverse planes. One striking characteristic of the normal QRS s-loop is that it li...
vector<double> normalizedData_l1, normalizedData_l2, normalizedData_inf, normalizedData_minmax; // Norm to probability (total count) // sum(numbers) = 23.0 normalize(positiveData, normalizedData_l1, 5.0, 100.0, NORM_L1); cout <<"*normalizedData_l1*:" << endl; ...
VECTOR analysisSYMMETRIC functionsPOLYHEDRAL functionsFor hypotheses about linear inequalities, we present algorithms to construct a more powerful test from a test with symmetric critical region, e.g., LRT and the tests of Liu and Berger's (1995). The test obtained from our algorithm is ...
Formulas for confidence, prediction, and tolerance regions for the multivariate normal distribution for the various cases of known and unknown mean vector ... V Chew - 《Publications of the American Statistical Association》 被引量: 63发表: 2012年 Some Basic Properties of the Mle's for a Multiv...