Aim To discusses the existence and uniqueness of limit cycles for a class of quadratic system.
目的研究一类二次微分系统的极限环存在性及唯一性。
It was proved that there exist homoclinic trajectories of a quadratic system in the range of the parameter of the saddle node bifurcation.
在鞍结分岔的参数范围内证明了具有鞍结分岔的二次系统都存在同宿轨道，得到了同宿轨道的解析表达式及其幅值与分岔参数的关系。
To conduct Quadratic Developing of software on multi-platform of CAD, there are a lot of problems on the interfaces of CAD platforms and system maintenance.
在多个CAD平台上进行软件二次开发，要花大量精力考虑支撑平台的接口问题和系统维护问题。
The package has the functions of modelling, system analysis, pole-placement control, optimal control, suboptimal control, LQG, selecting quadratic weighing matrices and system simulation etc.
该软件包具有模型变换、系统分析、极点配置控制、最优控制、次优控制、LQG、二次型权矩阵早优和系统仿真等功能。
In this paper, the optimal PID control system for aero-engine was designed using LQR (Linear-Quadratic Regulator) approach.
本文采用基于LQR的PID控制算法，设计某型号涡扇发动机控制系统。
We give general integral of quadratic differential system with center in two cases under the Chinese classification.
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 obtained the optimal movement parameters of this cleaning system by quadratic universal rotary assembly experiment.
通过二次通用旋转组合试验，得到了该清选系统的最优运动参数。
According to the standard form of MID system, the problem of mixed integer quadratic programming (MIQP) and its mathematics description can be obtained.
根据混合逻辑动态系统的标准形式，转化为混合整数二次规划(MIQP)的问题，同时获得它的数学描述。
A modified segmental quadratic interpolation method which describes the shape of optical system pupil with relative coordinate error less than 1% and area error about 0.25%, is presented.
本文提出了一种改进的分段二次插值法描写光学系统的光瞳形状，得到了满意的效果，其坐标误差小于1%，面积误差约0.25%。
The usual quadratic objective function is introduced for each system as the performance index.
引入了通常的二次型指标作为每一个系统的性能指标。
In this paper, the quadratic stabilization of linear time-varying system with structural model uncertainty is discussed.
本文讨论了带有结构性不确定的线性时变系统的二次镇定问题。
For a class of uncertain nonlinear time-delay systems, a state feedback control method which cause the system quadratic stabilization is proposed.
对于一类不确定非线性时滞系统，研究使系统二次稳定的状态反馈控制方法。
This paper discusses the application of linear quadratic optimal control theory in network PID control system.
讨论了线性二次型最优控制理论在神经网络PID控制系统中的应用。
In this paper the quadratic optimum problem in discrete system is discussed in terms of energy.
本文从能量角度来讨论离散系统的二次最优问题。
On the basis of modern control theory, the quadratic performance index was selected to design SCR DC speed-adjusting system.
本文以现代控制理论为基础，选用二次型性能指标设计可控硅直流调速系统。
Thecontrollers guarantee the system quadratic stability.
此控制器确保系统二次稳定。
For the linear quadratic (LQ) optimal control system, a method is proposed to choose the suitable weighting matrices which make the system have desired closed loop poles.
对线性二次最优控制系统，给出了选择适当加权矩阵从而保证系统具有希望闭环极点的方法。
The paper tells design method of linear quadratic optimal control applying MATLAB with practical example, and discusses parameters inserted to optimal control system.
本文通过实例介绍用MATLAB设计线性二次型最优控制问题的基本方法，并研究了参数变化对最优控制系统设计的影响。
Numerical experiments show our AMG method is robust and efficient for solving the quadratic Lagrangian finite element system.
数值实验表明这种代数多重网格法对求解二次拉格朗日有限元方程是健壮和有效的。
Considered the flexibility and the rapidity for the modern weapon system, fine alignment which bases on Linear Quadratic (LQ) optimal control is discussed detailedly.
考虑到武器系统机动性、快速性，本论文探讨了基于LQ线性二次型最优控制的精对准方案。
Finally, a quadratic regression equation is used to represent LTV system, and the GA and AIC are introduced to determine the structure of the parameter sub-model.
然后利用遗传算法和AIC确定参数子模型的结构，以获得最终用于表示LTV系统的二次回归方程。
Consider the distributed parameter system described by the second order partial differential equation of composed type, we discuss its a boundary optimal control problem with quadratic performance.
考虑用二阶复合型偏微分方程所描述的分布参数系统，研究了它的一个使平方性能指标达到最小值的边界最优控制问题。
Using the linear model with disturbances, the other law is designed to be robust based on the linear quadratic optimal control and the state observer of linear system.
二是采用带干扰的线性模型，在线性二次型最优控制和线性系统状态观测器的基础上，设计了一种无速度测量非线性鲁棒控制律。
Then, by introducing a corresponding Krein space stochastic system and applying projection and innovation analysis, the minimum of indefinite quadratic form and its existence condition are derived.
引入相应的格林空间随机系统，应用格林空间投影理论和新息分析方法，得到了不定二次型的最小值及其存在条件。
In this paper, the optimal regulator of an electro-hydraulic servo system is designed by using the quadratic theory, and the optimal regulating is realized through simulation.
文中应用二次型理论对一实际的电液伺服系统进行了最优调节器的设计，并通过仿真实现了系统的最优调节。
We consider the networked control system (NCS) from linear quadratic Gaussian (LQG) method, switched system and neural network control.
对网络控制系统分别从高斯型二次最优（LQG），切换系统和神经网络控制三个方面来考虑。
The Solutions of a kind of strongly nonlinear system with quadratic and cubic nonlinearities are derived by means of the MLP method, and its second order approximate solutions are obtained.
用MLP方法求解一类同时具有二次和三次项的强非线性系统的自由振动问题，得到其二级近似解。
Using this extended quadratic optimization theorem, the necessary and sufficient condition for the existence of stable quadratic optimal closed-loop system is obtained.
利用这个推广的二次最优定理，得到了存在稳定的二次最优闭环系统的充要条件。
Since the conclusion part is linear, the T_S fuzzy model can be treated as a linear time_varying system, the nonlinear program in NMPC turns into a linear quadratic problem that can be easily solved.
由于T_S模糊模型每条规则的结论部分是一个线性模型，因此整个模糊模型可以看作一个线性时变系统，从而将模糊预测控制器中的非线性优化问题转化为一个线性二次寻优问题，以方便求解。
Since the conclusion part is linear, the T_S fuzzy model can be treated as a linear time_varying system, the nonlinear program in NMPC turns into a linear quadratic problem that can be easily solved.
由于T_S模糊模型每条规则的结论部分是一个线性模型，因此整个模糊模型可以看作一个线性时变系统，从而将模糊预测控制器中的非线性优化问题转化为一个线性二次寻优问题，以方便求解。
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