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Frenet–Serret formulas print that page

In vector calculus , the Frenet–Serret formulas describe the kinematic properties of a particle which moves along a continuous, differentiable curve in three-dimensional Euclidean space R 3 . More specifically, the formulas describe the derivatives of the so-called tangent, normal | 2011/4/13 20:20:16

Surface normal print that page

A surface normal , or simply normal , to a flat surface is a vector that is perpendicular to that surface. A normal to a non-flat surface at a point P on the surface is a vector perpendicular to the tangent plane to that surface at P . The word normal " is also used as an adjective | 2011/5/6 9:43:25

Normal force print that page

In mechanics , the normal force (occasionally N ) is the component, perpendicular to the surface of contact, of the contact force exerted on an object by, for example, the surface of a floor or wall, preventing the object from penetrating the surface. The normal force is one of the components | 2011/10/4 12:39:09

Mean value analysis print that page

after visiting queue i the customer will visit queue j . From this matrix we can calculate the vector known as the visit-ratio vector by solving the eigenvector-like equation V P = V . Let N j ( n ) be the mean number of customers in queue j when there are a total of n customers in | 2010/9/26 0:50:27

Hesse normal form print that page

The Hesse normal form named after Otto Hesse , is an equation used in analytic geometry , and describes a line in or a plane in Euclidean space . It is primarily used for calculating distances, and is written in vector notation as This equation is satisfied by all points P described | 2010/9/24 23:24:16

Normal distribution print that page


In probability theory , the normal (or Gaussian ) distribution is a continuous probability distribution that is often used as a first approximation to describe real-valued random variables that tend to cluster around a single mean value. The graph of the associated probability density

Stress (mechanics) print that page

force per square inch , which is abbreviated as psi. Contents 1 Introduction 1.1 Normal and shear stresses 1.2 Stress modeling (Cauchy) 1.3 Stress analysis 2 Theoretical background 3 Euler–Cauchy stress principle 3.1 Cauchy’s postulate 3.2 Cauchy’s fundamental | 2011/5/18 18:35:03

Multivariate normal distribution print that page

In probability theory and statistics , the multivariate normal distribution or multivariate Gaussian distribution , is a generalization of the one-dimensional ( univariate ) normal distribution to higher dimensions. A random vector is said to be multivariate normally distributed if every | 2011/9/26 18:38:32

Jordan normal form print that page

In linear algebra , Jordan normal form (often called Jordan canonical form ) [ 1 ] of a linear operator on a finite dimensional vector space is an upper triangular matrix of a particular form called Jordan matrix , representing the operator on some basis . The form is characterized | 2011/5/21 11:31:58

Darboux frame print that page

Contents 1 Darboux frame of an embedded curve 1.1 Definition 1.2 Geodesic curvature, normal curvature, and relative torsion 2 Darboux frame on a surface 2.1 The trihedron 2.2 Change of frame 2.3 Structure equations 2.4 Principal curves 3 Moving frames 3.1 Frames | 2010/9/26 15:36:27