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.
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.
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.
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.
在最后一章，我们研究了一类部分可观测的线性二次非零和微分对策问题。
In the last chapter, one kind of partially observed linear quadratic non-zero sum differential game problem is studied.
研究广义状态系统中线性二次型微分对策鞍点策略的数值求解问题。
This paper studies the numerical problem of the saddle point strategy for linear quadratic differential game in generalized state systems.
对ESD应力下扩散电阻的四个区域：线性区、饱和区、雪崩倍增和负微分电阻区、二次击穿区的模型进行了分析。
Diffused resistor model under ESD stress in linear, saturation, multiplication and snapback, and secondary breakdown regions was analyzed.
根据有理函数及其导数性质，用微分法把有理函数分解为部分分式的和，给出了一次因式所对应的部分分式各系数和二次质因式前两对系数的计算公式。
Raised the differential method of resolving rational function into fractions, and formulas were suggested of the coefficients which correspond to liner factor and quadratic prime factor.
应用微分法作近似计算，推导出了齿轮加工中计算第二次径向进刀量的简易公式。
Makes the approximate calculation by the use of differentiation, and puts forward the simple and easy formula of second feeding in processing gear.
应用微分法作近似计算，推导出了齿轮加工中计算第二次径向进刀量的简易公式。
Makes the approximate calculation by the use of differentiation, and puts forward the simple and easy formula of second feeding in processing gear.
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