应用主成分分析方法构建了前兆震群判别方程，对震群活动的异常特征进行了分析。
The anomalous characteristic of the swarm activity is analyzed using the precursor swarm distinguishing equation constructed by the principal component analysis method.
上述研究结果表明，采用基于耳石形态的傅立叶分析方法来鉴别仔幼鱼的种类是可行的，以体长为基础的判别方程具有最好的判别效果。
The above results show that it is reasonable to discriminate larval and young fish with its otolith by Fourier shape analysis, especially based on body length.
第二章主要是研究某些类型的线性或非线性的带有离散时滞的偏差分方程解的振动性的判别法。
In the second part, we mainly consider oscillations of solution of some linear and nonlinear partial difference equations with discrete variables and delays.
给出系统振动的比较定理，利用比较定理讨论了一类非线性偏差分方程的振动性，给出简单的判别条件及证明。
By means of the comparison theorem, and the oscillation of some non-linear partial difference equations is discussed and some concise conditions and authenticity are given.
建立了一种混联型虚拟轴机床主进给机构位置分析的输入输出方程，并推导出奇异位形判别的解析表达式。
The input output equation of displacement analysis for the main feed mechanism of a new type hybrid virtual axis machine tool is established.
本文还提出了最优选配回归方程和最优预计的判别准则以及预计风险度的概念。
The paper also provides the judgement criteria of optimal fitting regression equation and optimal forecasting. At last the concept of forecating risk degree is given.
本文研究了一类具有连续偏差变元带中立项的双曲偏泛函微分方程解的H-振动性，给出了判别解H-振动的充分条件。
This paper studies the H-oscillations of hyperbolic partial functional in differential equations with deviating arguments and provides it with sufficient conditions.
本文研究一阶非线性中立型泛函微分方程的振动性。得到了该方程振动的充分性判别法则。
This paper deals with the oscillation of the first order nonlinear neutral type functional differential equation, and obtains sufficient criterion of the equation oscillation.
在线性方程组有解判别定理的基础上，给出了一个判定非齐次线性方程组存在全非零解的方法。
On the basis of the solution identification theorem in linear equations, a method is presented to ascertain whether there exists all-nonzero solutions to an inhomogeneous linear equation.
以偏微分方程稳定性的判别为依据，提出了临界风速的概念用来判定导线舞动的稳定性。
Based on the stability of differential equation, a concept of critical wind was introduced to estimate the stability of galloping.
建立了一种混联型虚拟轴机床主进给机构位置分析的输入输出方程，并推导出奇异位形判别的解析表达式。
An analytical expression for determining singularity configuration which is a polynomial equation is set, and the numeric symbolic manipulating technique is introduced in the paper.
研究一类非线性的偶数阶中立型时滞微分方程，得到了该类方程解振动的几个新的判别准则，得到的结果推广了已有文献中的结果。
The oscillatory criteria of even order nonlinear neutral delay differential equations are studied. The results obtained extend several results in known literature.
内容包含晶体管网络的DC方程、解的存在和唯一性定理以及解的性质的判别问题。
The contents being surveyed contain the DC equations of transistor networks, the theorems on the existence and uniqueness of their solutions and the criteria on the properties of the solutions.
本文在严格、完整的基础上，利用矩阵范数理论研究了结构非线性动力分析中数值积分格式的稳定性问题，给出了判别单自由度非线性动力方程积分格式稳定性的一般数学准则。
The problem of stability in the numerical integration schemes of nonlinear dynamic analysis of structures is discussed by using matrix and norm theory on a rigorous and complete basis in this paper.
在线性方程组有解判别定理的基础上，给出了一个判定非齐次线性方程组存在全非零解的方法。
Homogeneous linear equations of n-variables have the non-zero solutions when the rank of its matrix is less than n.
在线性方程组有解判别定理的基础上，给出了一个判定非齐次线性方程组存在全非零解的方法。
Homogeneous linear equations of n-variables have the non-zero solutions when the rank of its matrix is less than n.
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