统计学里moment这个概念是从物理学引申出来的。前面的回答都给出了很好的定义,读者也可以参考Moments - Definition of Statistics Terms这里的解释。初学统计的人(包括我自己)往往对"moment"特别是中文翻译"矩"感到困惑,这丝毫不奇怪,因为它离原始含义"to move"或者"移动"已经太远了。统计学上的矩和物理上的矩,都...
Definition 2Thevarianceof a random variableXX=VarX=E(X−EX)2=VarX=E(X−EX)2. The standard deviation ofXX=√VarX=VarX. Part 2: Moment Generating Function (mgf) The mgf can be used to generate moments. In practice, it is easier to compute moments directly than to use the mgf. ...
网络矩统计量 网络释义 1. 矩统计量 ...XP@163.com 相关系数 相关系数 (7)、矩统计量(Moment Statistics): 均值和方差都是由样本数值(或减去均值后)的某 … www.docin.com|基于 1 个网页
juncture:at this moment in history. importance or consequence:a decision of great moment. a particular time or period of success, excellence, fame, etc.:His big moment came in the final game. Statisticsthe mean or expected value of the product formed by multiplying together a set of one or...
English Definition (名) As a noun Having important effects or influence. The n-th moment of a distribution is the expected value of the n-th power of the deviations from a fixed value. A turning force produced by an object acting at a distance (or a measure of that force). At ...
The geometric properties of low-order moments are discussed along with the definition of several moment-space linear geometric transforms. Finally, significant research in moment-based object recognition is reviewed. 展开 关键词: General or Review, Practical/ invariance pattern recognition picture ...
AcronymDefinition MMale MMiddle MMonthly M1000(Roman numeral) MMonsieur MMeter(SI unit of length) MMega-(Million) MMusic MMoney MMedia MMember MManagement MMaster MMean(arithmetic average; math; statistics) MMachine MMouth MMulti MMaterials ...
DefinitionLet be a random variable. If theexpected value exists and is finite for all real numbers belonging to a closed interval , with , then we say that possesses a moment generating function and the function is called themoment generating functionof ...
in the definition for the current loop, the magnetic moment is the product of the current flowing and the area, m = i a so, the unit conferring to this definition is articulated by amp-m 2 . it can also be suggested in terms of torque and moment. conferring to that, the ...
Moments are widely used to describe mathematical functions due to their numerical simplicity and numerous physical interpretations. The concept has been used for many years in diverse areas such as mechanics and statistics and has been successfully applied to pattern recognition, registration, object ...