一种改进的无线传感器网络EEMCDS算法

针对无线传感器网络中的有效路由,提出了一种改进的,基于最小连通支配集的能量有效算法IEEMCDS(Improved Energy-Efficient Minimum Connected Dominating Set).路由搜索主要集中在连通支配集内,通信量小.该算法是一个能量有效的分布式算法,在维护最小连通支配集时,充分考虑了节点的能量问题,优先选择高能量的节点充当连通支配集节点,提出了支配节点能量最小阈值调整法,可以有效地延长网络寿命.实例仿真表明在改进算法的连通支配集中,高能量的节点在支配集中一直占有较高的比例,从而有效地延长了网络寿命.     

系统辨识的新进展——第七届IFAC辨识与系统参数估计会议纪实

一、会议概况和特点第七届国际自控联辨识与系统参数估计学术会议于1985年7月3日至7日在英国英格兰北部的约克城召开。我国十五名代表出席了会议。这次会议历时五天,有四十余个国家的362名代表出席,是一次世界性的学术盛会。许多国际著名控制论专家出席了这次会议。如现代控制理论奠基人之一R.Kalman教授,国际自控联副主席兼技术委员会(TechnicalBoard)主席B.D.O.Anderson教授,国际自控联常委MIT顾问、瑞典隆德大学教授K.J.Astrom,国际自控联理论委员会主席L.     

基于T—S模糊神经网络的ATM网络业务量智能控制

ATM网络的业务量控制是ATM网络中的关键技术之一。在充分考虑了模糊神经网络的学习功能后,提出了利用T－S模糊神经网络算法对ATM网络进行呼叫接纳控制。仿真结果表明,该方法提高了网络对呼叫的实时处理能力,又增加了网络资源的利用率。     

典型工业过程的无超调预测控制设计

讨论了二阶系统具有无超调响应的充分必要条件,并结合一类典型工业对象的预测控制设计,分析了相应设计参数对闭环系统的影响,得到了具有无超调控制特性的条件。仿真结果表明,所得出的结论是正确的。     

一种改进的遗传算法及其在系统辨识中的应用

提出一种基于遗传算法的大惯性系统辨识方法。该方法将动态补偿和遗传算法相结合 ,实现了系统的参数辨识。为避免遗传早熟而进入局部最优 ,对交换和变异操作进行了改进 ,提出一种防止近亲繁殖的交换策略 ,在不明显增加基因操作计算量的前提下 ,有效地避免了基因缺失。仿真结果表明 ,该方法对过阻尼系统的辨识是有效的。     

基于IMC结构的PID-GPC的鲁棒性分析

Proportion integral differential generalized predictive control(PID-GPC),a new type of generalized predictive control(GPC) is introduced,and its quality is analyzed with internal model contron(IMC).A very important characteristic,which distinguishes GPC from ordinary IMC,and the robust effect are found.At the same time,a robust region is obtained according to the control laws,so that the defect that the robust analysis could be carried out only with stable models is vercome.It is verified that the robustness of PID-GPC is stronger than general GPC.     

Spreading behavior of SIS epidemic model on networks with dynamical topology

Based on the two-dimensional regular lattice,a modified SIS(Susceptible-Infected-Susceptible)epidemic model with motion rules is presented to study the spreading behavior on networks with dynamical topology.The mean-field theory is utilized to analyze the critical threshold(λc)of epidemic spreading under the randomly mixing conditions.It is found that λc is only related with the population density within the lattice.Large-scale numerical simulations are carried out to verify the mean-field results,and it is observed that the long-range probability p largely affects the epidemic spreading behavior.In addition,the effect of the dual time scales on epidemic spreading is also investigated by the simulations,and it is shown that the dual time scales accelerate the dynamic spreading behavior.The results indicate that the model with motion can help us to further understand the real epidemics.     

混沌机制在T-S模型模糊神经网络的系统辨识研究

提出一种T－S模型的模糊神经网络,在通常BP算法的基础上,引进混沌机制来训练模糊神经网络的权值参数。将混沌BP算法应用于非线性系统建模,以求获得全局意义下的最优逼近。仿真研究说明了其有效性和良好的性质。     

自校正调节器及其在化工中的应用

用一个适当阶次的线性差分方程近似描述被控过程,使输出方差最小来设计自校正调节器,其参数用在线最小二乘递推估计得到。它能构成具有随机自适应的控制系统,可用小型计算机或微型控制机实现。     

基于定量反馈理论的多变量解耦预测控制及其在CSTR化学过程中的应用

1 INTRODUCTION Many multi-input and multi-output (MIMO) sys- tems worldwide are regarded as linear invariants, but there are still some difficulties in controlling these systems. The challenges arise from the need to achieve both robust stability and control performance when the plants to be controlled are highly uncer- tain[1―3]. Quantitative feedback theory (QFT) is a fre- quency domain design technique[4], which is perhaps the only known method that deals with highly uncer- tain pla…