混合矩(mixed moment)亦称 “联合矩”、“乘积矩”、“多元矩”，是两 个或两个以上随机变量的联合数字特征。若ξ，η为随机变量，并且E(|ξkηl|)<∞(k和l是自然数)，则ξkηl的数学期望E(ξkηl)称为ξ和η的k+l阶混合矩，若E(|ξ-Eξ|k·|η-Eη|l)<∞，则E[(ξ-Eξ)k(η-Eη)l]称为ξ和η的k+l阶混合中心矩。
导出了关于混合模的耦合边界积分方程组及其退化形式，并用矩量法将之离散为齐次代数方程组，从而得波导的混合模传输常数；
The coupled boundary integral equations and their reduced forms are deduced for hybrid mode problems, and these equations are discreted into a system of linear algebraic equations by moment method.
广义矩方法（GMM）； 混合回归-空间自回归（MRSAR）； 过度识别。
Generalized method of moments (GMM); Mixed regressive-spatial autoregressive (MRSAR); Over-identifying.
本文从非线性参数的分析出发，考虑电机的磁饱和因素，而提出一种混合式步进电动机运行矩频特性的实用计算方法。
The paper presents a practical calculating method for running torque-frequency characteristics of a hybrid stepping motor, considering magnetic saturation and analyzing the nonlinear parameters.
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