一种重要的情形是常系数二阶线性齐次微分方程。
An important case is the linear homogeneous second-order differential equation with constant coefficients.
研究了一类原点为三次幂零奇点的三次微分系统。
A class of cubic differential system is studied in this paper, in which origin is nilpotent singular point.
权函数是得自对应的齐次微分方程的一般解和完备系。
The weighted functions are obtained based on the use of completed systems of general solution of the corresponding homogeneous equations.
目的研究一类二次微分系统的极限环存在性及唯一性。
Aim To discusses the existence and uniqueness of limit cycles for a class of quadratic system.
用二次微分简易示波伏安法测定了金刚石酸洗废液中的痕量镍。
Trace nickel in waste solution from process of diamond cleaning by acid is determined by second order differential simple oscillographic voltammetry.
本文给出在中国分类之下二次微分系统有中心时两种情况的通积分。
We give general integral of quadratic differential system with center in two cases under the Chinese classification.
本文介绍了用2.5次微分吸附溶出伏安测定甲氧苄氨嘧啶(TMP)的新方法。
This paper describes a new method of determining Trimethoprim (TMP) by the 2. 5th order of differential adsorptive stripping voltammetry.
在极大值函数的有效域为非空凸集的条件下研究了次微分，并给出它的结构表达式。
And the expression of its subdifferential is developed in the case that the effective domain of the sup-type function is a non-empty convex set.
对彩电教科书中有关二次微分电路的分析提出了不同见解。并作了深入详细的分析。
Different from that in current textbooks on color-TV, a view about the analysis on twice differential circuit is brought forward and reliable analysis is given in detail.
5次微分伏安法和循环伏安法对鸟嘌呤在碳纤维微电极上的电化学行为进行了研究。
5 order differential voltammetry and cyclic voltammetry are used to investigate the electrochemical oxidation of guanine at a carbon fiber microelectrode.
本文证明了一条关于K - S函数的梯度收敛于相应的极大值由数的次微分的定理。
In this paper, we prove a theorem on the convergence of the gradient of K-S function to the subdifferential of corresponding maximum function.
在理赔量和保费量分别服从指数分布时给出了相关推导，得出了具体的三次微分方程。
As a special case, the third order differential equation is derived when both the premium and the claim size are exponential distributions.
选用1.5次微分伏安法和循环伏安法对鸟嘌呤在碳纤维微电极上的电化学行为进行了研究。
The 1. 5 order differential voltammetry and cyclic voltammetry are used to investigate the electrochemical oxidation of guanine at a carbon fiber microelectrode.
最后对凸模糊映射的次梯度、次微分和微分等概念进行了研究，为模糊极值理论打下了基础。
The notions of subgradient, subdifferential, differential with respect to convex fuzzy mappings are investigated, which provides the basis of the theory of fuzzy extremum problems.
在局部凸线性拓扑向量空间讨论了一种锥凸集值映射的锥次微分的存在性问题，证明了几个锥次微分的存在定理。
The problem of the existence of a cone subdifferential for the cone convex set valued maps in the locally convex, linear and topological vector space is discussed.
本文首先给出了集值映射序列的极限映射的上半连续性与J -凸性；其次解决了集值映射序列的极限映射的锥次微分的存在性。
In this paper, we have discussed some problems about the upper semi-continuity and J-convexity of the limit mapping of set-valued mapping sequence.
研究了函数和集在某点的邻近正则性与次微分连续性，给出邻近正则函数的次微分在某种意义下的单调性及函数的邻近正则性与其上图的邻近正则性的关系。
The monotonicity, in some meaning, of subdifferential of prox regular functions and the relationships between prox regular of function and its epigraph are studied in this paper.
二进制的理论，就微分方程而言，第一次在这本书里被对待。
The theory of binaries, in terms of differential equations, is treated for the first time in this book.
该方法无须迭代即可直接从微分方程辨识出模型阶次和参数。
The model's order and parameters are estimated from the differential equation directly without iterations.
常数变易法是求解非齐次线性微分方程的一种有效方法。
Methods of constant variation are an efficient solution to all nonlinear differential equations.
在非线性偏微分方程中，根据弱可压缩液体的假设，忽略二次梯度项，在试井较长时间内将产生误差。
According to the assumption of slightly compressible fluid, neglected the quadratic gradient term in nonlinear partial differential equation is usually lead to error.
基于模拟的CHAMP卫星观测数据，分别用数值微分法和能量守恒法恢复50阶次的重力位系数。
Numerical differential method and energy balance approach are applied respectively to recover the geopotential coefficients until 50 degree based on the simulated observation datum of CHAMP.
证明了一类非线性项受幂函数控制的次线性分数微分方程的正解存在性。
The existence of positive solution is proved for a class of sublinear fractional differential equations where the nonlinear terms subject to the power functions.
论述了伪微分反馈次变量(PDFSV)控制方法。
Pseudo differential feedback sub variable (PDFSV) control method is expounded.
讨论了一类二阶强次线性时滞微分方程解的振动性质，建立了三个新的振动性定理。推广和改进了已知的一些结果。
The oscillation of a class of second order strongly sublinear delay differential equations is discussed. Three new theorems are established. The results generalize and improve some known ones.
讨论了一类二阶强次线性时滞微分方程解的振动性质，建立了三个新的振动性定理。
The oscillation of a class of second order strongly sublinear delay differential equations is discussed. Three new theorems are established.
讨论了一类二阶强次线性微分方程解的振动性质，获得了三个新的振动性定理，推广和改进了相关文献的结果。
The oscillation for solutions of the class of the second order strongly sublinear differential equation are discussed and three new oscillation theorems are obtained.
本文给出了一种高效率求解油气二次运移偏微分方程的方法。
An effective method for solving a partial differential equation of secondary hydrocarbon migration is put forward.
本文给出了一种高效率求解油气二次运移偏微分方程的方法。
An effective method for solving a partial differential equation of secondary hydrocarbon migration is put forward.
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