# principal-axis transformation

- 主轴变换

*English-Chinese computer dictionary (英汉计算机词汇大词典).
2013.*

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**Principal axis theorem**— In the mathematical fields of geometry and linear algebra, a principal axis is a certain line in a Euclidean space associated to an ellipsoid or hyperboloid, generalizing the major and minor axes of an ellipse. The principal axis theorem states… … Wikipedia**Principal components analysis**— Principal component analysis (PCA) is a vector space transform often used to reduce multidimensional data sets to lower dimensions for analysis. Depending on the field of application, it is also named the discrete Karhunen Loève transform (KLT),… … Wikipedia**Principal component analysis**— PCA of a multivariate Gaussian distribution centered at (1,3) with a standard deviation of 3 in roughly the (0.878, 0.478) direction and of 1 in the orthogonal direction. The vectors shown are the eigenvectors of the covariance matrix scaled by… … Wikipedia**Norman Arthur Wiegmann**— (13 April 1920–14 November 2001) was a mathematician specializing in modern algebra, in particular linear algebra and matrix theory, who spent a major part of his career teaching at the George Washington University and other universities. He… … Wikipedia**Singular value decomposition**— Visualization of the SVD of a 2 dimensional, real shearing matrix M. First, we see the unit disc in blue together with the two canonical unit vectors. We then see the action of M, which distorts the disk to an ellipse. The SVD decomposes M into… … Wikipedia**Ellipsoid**— This article is about the shape. For the type of theatrical spotlight, see ellipsoidal reflector spotlight. For the surface that approximates the figure of the Earth, see reference ellipsoid. triaxial redirects here. For the electrical cable, see … Wikipedia**Screw theory**— was developed by Sir Robert Stawell Ball in 1876, for application in kinematics and statics of mechanisms (rigid body mechanics). It is a way to express displacements, velocities, forces and torques in three dimensional space, combining both… … Wikipedia**Hyperbola**— This article is about a geometrical curve, a conic section. For the term used in rhetoric, see Hyperbole … Wikipedia**X-ray crystallography**— can locate every atom in a zeolite, an aluminosilicate with many important applications, such as water purification. X ray crystallography is a method of determining the arrangement of atoms within a crystal, in which a beam of X rays strikes a… … Wikipedia**Diffusion MRI**— Diagnostics DTI Color Map MeSH D038524 Diffusion MRI is a mag … Wikipedia**Crystal structure**— In mineralogy and crystallography, crystal structure is a unique arrangement of atoms or molecules in a crystalline liquid or solid. A crystal structure is composed of a pattern, a set of atoms arranged in a particular way, and a lattice… … Wikipedia