导数

In Part 5, the stability of linear large-scale singular dynamic system is investigated by using the method of vector generalized Lyapunov function and the sum type of scalar generalized Lyapunov function, respectively.

首先研究线性广义系统二次型李雅普诺夫函数的存在性；然后建立按线性近似系统决定非线性广义系统稳定性的准则；进而改进广义李雅普诺夫函数法以研究广义系统的稳定性；最后提出利用非线性函数的偏导数矩阵判别非线性微分-代数系统稳定性的若干简便判据。

The geometric meaning of derivative.

导数的几何意义。

The linear model of flight vehicle is the base of GNC system design.

飞行器线性模型是制导与控制系统设计的基础，传统建模方法是利用公式推导，求解力和力矩的导数，确定小扰动方程的系数。

The present work proposed a simple computation of the second horizontal derivatives of gravitational potential fieldsusing a digital filter of five operators that is designed to fit the data in the least-square concept.

从目前的研究来看，二阶垂直导数的求解方法较简单，它采用的五个因子的数字滤波的最小二乘法来优化数据。

It consists of fitting seismic ray traveltimes and positions to data calculated by ray tracing. In order to improve inversion stability and efficiency, seismic ray is described by Hamilton function and ray tracing is done in phase space. Validation tests on synthetic and practical data are analyzed. The tests show that this tomographic method is effective for estimating velocity field in complex media.

为提高反演的稳定性和计算效率，引入了Hamilton函数描述射线，在相空间计算反演所需的射线路径和目标函数对模型参数的导数，对理论模型和实际地震资料进行了试算，试算表明该方法对复杂介质具有较强的适应能力。

An unsteady aerodynamic model based on Fourier analysis is developed in the frequency domain with the theory of system identification and the experimental data of large amplitude harmonic oscillation. This unsteady aerodynamic mathematical model is used to extract dynamic derivatives, and the meaning of a time-lag loop is analyzed.

应用系统辨识理论，利用纵向大振幅非定常气动力实验数据，在频率域内建立了基于Fourier变换法的非定常气动力数学模型，并发展了一种获取常规动导数的仿真实验方法，分析了迟滞环的物理意义。

Begehr constructed Hermite interpolatory polynomial in the meaning of non-tangential limit derivatives and got another method of solution.

Begehr教授[10]在非切向极限导数意义下构造Hermite插值多项式，给出了该问题的一种新解法。

Rather than discussing higher derivative gravity (where our lunch discussion took off) I would like to discuss a much simpler system.

而不是讨论高阶导数引力我要讨论一个非常简单的系统。

As the cam profile with constant-velocity-constant-acceleration ramp feature and with continuous higher derivative lift feature is widely adopted in the advanced high-speed internal combustion engines, the cam ramp profile is fitted with a reasonable function and the cam-lift profile is fitted with a polynomial function.

考虑到高速内燃机的凸轮大多采用具有等加速-等速特征的缓冲段和高阶导数连续特征的工作段型式，用等加速-等速函数拟合缓冲段实测升程数据，用整体式高次多项式函数拟合工作段实测升程数据。

A quasilinear equation is one in which the highest -order derivative appears linearly.

最高阶导数线性地出现的那种方程是准线性方程。

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。