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函数的周期

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Assuming that the connect and infectious rate is a periodic function, we study the asymptotic behavior of the solution for this model.

在模型中,假设接触感染率为时间的周期函数,研究模型解的渐近行为,得到了疾病传播的阈值。

The parameter of the cosine function affects the center of time gravity of the cosine-Gauss pulse in a certain range, even for the cosine-Gauss pulse whose pulse width is longer than one optical oscillation period.

余弦函数的参量在一定取值范围内对余弦-高斯脉冲也有较大的影响,它可能导致几周期余弦-高斯脉冲的时间重心有较大的漂移。

Finally, a new function transform was proposed to solve nonlinear evolution equations with the help of the solutions of elliptic equation, and many new results are obtained

五、对椭圆方程进行讨论,提出新的函数变换并利用椭圆方程的解来求解非线性发展方程,从而得到大量新的周期波解。

Fourth, at basic of the improvement of Jacobi elliptic function expanded method, the extended Jacobi elliptic function expanded methods was proposed.

四、对Jacobi椭圆函数展开法进行改进和扩展,提出新的扩展的Jacobi椭圆展开法来求解非线性发展方程并得到许多新的周期波解。

As applications of our results,in section 3.3,we investigate the existence of periodic solutions and golbal exponential stability of some classes of impulsive cellular neural networks with time delays.

第四章首先使用Krasnoselskill锥不动点定理研究了一类一阶奇异脉冲泛函微分方程的周期边值问题,得到了这类奇异边值问题正解存在性的充分条件,我们的结果允许右端函数f中关于u是奇异的。

In this papper, the methods of decomposition of large-scale system and Liapunov function are used in studying the existence of stationary oscillation of periodic interval system and some new results are obtained.

应用大系统的分解和Liapunov函数的方法研究了周期区间系统的平稳振荡的存在性问题,得到了一些新的结果。

W ithout assuming the boundedness, monotonicity, differentiability and Lipschitz continuity of the active functions, an algebraic criterion to ensure existence and globally exponential stability of periodic solutions was obtained.

在 放松该类神经网络激活函数的有界性、单调递增性、可微性及Lipschitz连续等条件下,得到了该类神经网络周期解的存在性与全局指数稳定的代数判据。

Then according to the characteristic of LFMCW fuze signal,the characteristic parameter is extracted based on periodic ambiguity function.

该方法首先对侦察接收到的信号作二维自相关变换,分析LFMCW引信信号的周期模糊函数特征,然后结合LFMCW引信信号本身的特性,在相关域提取LFMCW引信信号的特征参数。

In this paper,it is suggested that the stable solution of Grüner′s equation is periodical.

通过理论分析和数值计算,给出Grüner方程的稳定解dφ/dt是一个与sinφ有相同周期的函数的见解。

VSOP87 Functions used to Compute Planeta - These functions are a VB version of the complete VSOP87 planetary theory designed to be used to in a program to compute the heliocentric ecliptic longitude, latitude and distance of the planets Mercury to Neptune over a period of several thousands of years to about 1 arcsecond of precision.

这些函数是一个VB版本的完整VSOP87行星理论,旨在一个程序中用来计算以太阳为中心的黄道的经度,纬度,以及Mercury到Neptune行星的距离(从数千年到大约1arc秒精度的周期内)。

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在对危险的南部地区访问时,他斥责什叶派民兵领导人对中央集权的挑衅行为。

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