查询词典 stability criterion

Obviously, the study on nonparallel boundary layer stability has an important sense in theory, on the other hand, the determination of precise growth rate of disturbance is help to enhance the precision of the factor in transition criterion, so it has also an important sense in practice.

本文对非平行流边界层稳定性问题所进行的深入研究，显然具有重要的理论意义，而且所精确确定的扰动放大值，有助于实用转捩准则中放大因子精确度的提高而具有重要实用价值。

Meanwhile, we also study the stability of the nondegeneratedand nontwisted homoclinic loop for the two cases of nonresonant and resonant,and obtain the corresponding criterion.

同时还研究了非退化非扭曲同宿环在非共振和共振两种情况下的稳定性问题，得到了相应的判别准则。

Based on the dynamical system of a tuberculosis spread m odel, the dynamical behavior of a tuberculosis spread model with constant immigr ation was discussed, and the local and global asymptotic stability of the endemi c equilibrium on this model is studied by using Hurwitz criterion and multiple m atrix theory. Sufficient conditions for the local and global asymptotically stab ility of the endemic equilibrium on this model are obtained.

在结核病传播的数学模型的动力学系统基础上，利用 Hurwitz 判据和复合矩阵理论，讨论了具有常数移入的结核病传播的数学模型的动力学性质，研究了具有常数移入的结核病模型的地方病平衡点的局部和全局渐近稳定性，得到了具有常数移入的结核病模型的地方病平衡点是局部和全局渐近稳定的充分条件。

This criterion is further improved by introducing de Oliveira's parameter-dependent stability idea, which is less conservative than previous results for polytopic uncertain systems.

并将de Oliveira的参数依赖思想引入该判据。得到了适用于多面体不确定系统的参数依赖型时滞相关稳定条件。

The criterion of stability and formula of the criti-cal rotative velocity obtained just is the same as that of the linear theory ofContensour-Magnus complately.

所得的稳定性判据及临界转速的表达式与Contensou-Magnus线性理论完全相同。

In Chapter three, the direction and stability of the bifurcating periodic solutions are determined by the Nyquist criterion and the graphical Hopf bifurcation theorem.

在第三章，利用奈奎斯特准则和Hopf分岔图示定理分析上述两个模型的Hopf分岔方向与分岔周期解的稳定性。

The range of the ordinary PID control parameter was extracted with Louts criterion, and the PID control parameters are used as the control parameters in stability range of magnetic suspension system.

该方法以电磁铁动力学和电磁线圈的电压平衡方程，建立磁悬浮系统基本模型，利用劳斯判据求出常规PID控制参数并应用到磁悬浮系统的控制参数稳定范围。

This paper introduces a criterion of linear system stability , which is de rived from the relationship between matrix trace and matrix characteristic value and the analysis of companion matrix .

通过矩阵迹和特征值的关系，以及对友矩阵特性的分析，本文导出一个线性系统稳定性的算法，它简单实用，收敛快，准确度高。

Methods:According to national drug criterion of xylitol i njection,we adopted sodiumthiosulfate titrating method to determine the content of the xylitol,and carried on the methodology,including linearity range、prec ision、stability、average recovery and so on.

参照国家药品标准，采用硫代硫酸钠滴定法进行木糖醇注射液中木糖醇的含量测定，并进行方法学考察，包括线性范围、精密度、稳定性、加样回收率等。

Stability analysis of nonlinear magnetic suspension, the magnetic suspension system model was found based on electromagnet dynamics and voltage balance of the electromagnet coil; The feedback of position and velocity and current are used as the control variable; After the control rule was applied to the electromagnetic system, the louts criterion was used to get the range of the control parameter in which the system was steady-going.

非线性磁悬浮系统的稳定性分析，通过电磁铁动力学和电磁线圈的电压平衡方程，建立磁悬浮系统基本模型。求出系统奇点后，通过系统线性展开求出系统矩阵。用PD控制外加电流反馈量，将控制规律带入系统模型方程组求出矩阵的特征方程，由劳斯判据得知非线性系统稳定的位置反馈系数及取值范围。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。