1) quadratic system(III)
二次系统(Ⅲ)
2) №3 equation of 2th-differential system
二次微分系统Ⅲ类方程
3) secondary system
二次系统
1.
Hotline work technology on substation secondary system;
变电所二次系统带电作业技术
2.
Study of testing criteria for secondary systems of 110 kV digital substations
110kV数字化变电站二次系统检验规范的研究
3.
The article shows how to build a structure about safeguard system of secondary system in electric power control center in GanXi Region,which can help keeping the electric power network running safely,stably and economically.
文章主要阐述如何在赣西地区调度中心二次系统中建立安全防护体系,以达到保障赣西地区电网的安全、稳定、经济运行的目的。
4) quadratic system
二次系统
1.
Global structure of a class of quadratic system;
一类二次系统的全局结构
2.
Uniqueness of limit cycles of type Ⅲ quadratic system(Ⅰ);
Ⅲ类二次系统极限环的惟一性(Ⅰ)
5) quadratic systems
二次系统
1.
This paper discusses the conditions of the quadratic systems (Ⅱ) δ=0 with second order fine focus.
讨论了二次系统(Ⅱ)δ=0具有二阶细焦点的条件,并对n=0时以原点O(0,0)为二阶细焦点的二次系统(Ⅱ)δ=0作了全局分析。
2.
In this paper,we apply Abelian integrals and complete elliptic integrals of the first,second kinds to study an upper bound on the number of zeros of Abelian integrals for a class of the plane quadratic systems with two centres,under polynomial perturbation of arbitrary degree n.
利用Abel积分与第一、第二型完全椭圆积分,本文研究一类具有两个中心奇点的平面二次系统在n次小扰动下的Abel积分零点个数上界问题,得到了较小的上界估计。
3.
The new criteria for the uniqueness of limit cycles of the quadratic systems have been given by using the quadratic curve without contact.
借助于一个变换和一条无切二次曲线,研究一般的二次系统极限环的唯一性,得到若干新的判别 法,它们分别用于判定单个奇点外围的极限环的唯一性、两个奇点外围极限环的同时唯一性、两 奇点外围的极限环不能同时多于一个。
6) secondary air system
二次风系统
1.
Utilizing mechanism analyzing and statistical analyzing methods,a dynamic model of secondary air systems has been constructed and its effectiveness and accuracy validated by simulation.
采用机理分析和统计分析的方法,建立了二次风系统非线性动态模型,并通过仿真验证了模型的有效性和准确性。
补充资料:二阶线性齐次微分方程
二阶线性微分方程的一般形式为
ay"+by'+cy=f(1)
其中系数abc及f是自变量x的函数或是常数。函数f称为函数的自由项。若f≡0,则方程(1)变为
ay"+by'+cy=0(2)
称为二阶线性齐次微分方程,而方程(1)称为二阶线性非齐次微分方程。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条