时滞

This paper is devoted to investigate a kind of lattice Nicholson s blowflies model with delay,and prove the existence of traveling wavefronts by upper-lower solution and monotone iteration technique.

考虑了一类具有时滞的格散N icholson苍蝇模型，并利用上下解和单调迭代技巧证明了此方程波前解的存在性

This paper is devoted to discuss the bifurcation of a chemostat with delay and simplified Holling type-IV response function.

关于培养器模型各种类型的方程如常微分方程，偏微分方程和时滞微分方程等已经有了很多结果。

In section 1, we introduce the production and development of the chemostat, the system which will be discussed and the chief work of this paper. We also explain why the simplified Holling type-IV response function can be used in this system.

第一节介绍培养器模型的提出和发展、本文要考虑的系统以及主要工作，分析了引入时滞的必要性，对为何采用简化的HollingⅣ型功能反应函数也做了具体说明。

It is proved that time delays that represent the lags between the uptake of nutrients and the reproduction of microorganism don't affect the stability of Chemostat models.

证明了从吸收营养到转化为生物量的时滞不影响微生物培养模型的稳定性。

Some global properties such as global at tractivity and global exponential stability for delayed Hopfield neural networks model, under the weaker assumptions on nonlinear activation functions, are conc erned.

对具有时滞的Hopfield神经网络模型，在非线性神经元激励函数是Lipschitz连续(而非已有的大部分文献中假设是Sigmoid函数)的条件下，通过构造适当的泛函，给出了这类模型全局吸引和平衡点全局指数稳定的易于验证的充分条件。

With this model, the deformation and stress distributions of the flange joint are analyzed using ANSYS FEM software, and the influences of gasket properties, tube side pressure and shell side pressure, bolt pr.

本论文以U形管换热器法兰夹管板接头为研究对象，考虑垫片材料压缩的非线性特性和压缩-回弹时的时滞效应，将法兰接头各元件看成一个系统，研究各元件的相互作用，建立了管板-法兰-垫片-螺栓连接系统的非线性三维有限元分析模型。

At the end of this dissertation, we list problems for our future work which includes delay differential equations and the application of chaos and fractals.

本文的第八章，我们列出了在时滞微分方程，混沌以及分形应用方面尚待继续研究的问题。

The delay-dependent state feedback solution is presented in terms of a set of linear matrix inequalities.

采用Lyapunov-Krasovskii稳定性分析方法，给出了区间时滞依赖系统的状态反馈设计稳定解。

Radial Basis Function Neural Network is adapted to improve the structure of Dynamic Matrix Control algorithm in this paper.

利用RBF网络对DMC算法进行结构上的改进，并用RBF网络的逼近性能建立预测模型，提出一种基于RBF神经网络建模的动态矩阵控制算法，并用该算法对典型的时滞系统进行仿真试验，结果表明该算法具有较高的控制精度和响应速度

In Chapter 4, the influence of pulse vaccination, time delays and vertical transmission on SEIR and SEIRS epidemic models is investigated.

第四章研究脉冲免疫接种、时滞及垂直传染对SEIR及SEIRS流行病动力系统的影响。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。