Bursting-like motion induced by time-varying delay in an internet congestion control model

Time delay is an problem of intemet congestion important parameter in the control. According to some researches, time delay is not always constant and can be viewed as a periodic function of time for some cases. In this work, an internet congestion control model is consid- ered to study the time-varying delay induced bursting-like motion, which consists of a rapid oscillation burst and quies- cent steady state. Then, for the system with periodic delay of small amplitude and low frequency, the method of multiple scales is employed to obtain the amplitude of the oscillation. Based on the expression of the asymptotic solution, it can be found that the relative length of the steady state increases with amplitude of the variation of time delay and decreases with frequency of the variation of time delay. Finally, an effective method to control the bursting-like motion is pro- posed by introducing a periodic gain parameter with appropriate amplitude. Theoretical results are in agreement with that from numerical method.

扁平化——网络治理之道

宣传工作是国家治理的重要组成部分,是维护主流意识形态安全的重要保障。当前我国宣传体制机制必须适应互联网时代的特点而改革创新。本文提出,扁平化宣传机制改革的目标是确保中国共产党在互联网时代对舆论的控制权和意识形态的安全。当前科层化的宣传管理体制机制无法适应互联网时代的舆论传播特点,已经暴露出诸多弊端,网络舆论阵地存在全面失守的危险。网络媒体的时代特征决定了宣传体制机制扁平化需要互联网思维,需要我们在充分理解互联网对新闻传播路径、社会话语体系、舆论演化规律等方面带来的结构性变化的基础上,把平等、开放、对话、参与、迭代、社会化、大数据等互联网精神作为全新的宣传思想和方式方法。