Formation-containment control problem is investigated for the second-order multi-agent systems with distinct time-varying delays. By using Lyapunov-Krasovskii functional and linear matrix inequality, delay-dependent s...
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ISBN:
(纸本)9781509015740;9781509015733
Formation-containment control problem is investigated for the second-order multi-agent systems with distinct time-varying delays. By using Lyapunov-Krasovskii functional and linear matrix inequality, delay-dependent sufficient conditions are obtained for the leaders reaching a prescribed formation and the followers converging into the convex hull formed by leaders, respectively. Moreover, the correctness of control strategies is illustrated by numerical simulations.
This paper addresses the problem of estimating states and parameters of chaotic memristive systems with single measurable variable. Based on the conventional extended Kalman filter, we present two new strategies based...
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ISBN:
(纸本)9781509009107
This paper addresses the problem of estimating states and parameters of chaotic memristive systems with single measurable variable. Based on the conventional extended Kalman filter, we present two new strategies based on the joint extended Kalman filter and dual extended Kalman filter. Then, the two kinds of filters are employed to estimate the states and parameters of chaotic memristive systems. Finally, numerical simulations are provided to illustrate the effectiveness of the proposed methods.
This paper is concerned with the event-triggered H control for the networked control systems with non-uniform sampling and packet losses via dynamic output feedback controller(DOFC).By proposing the event-triggered me...
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This paper is concerned with the event-triggered H control for the networked control systems with non-uniform sampling and packet losses via dynamic output feedback controller(DOFC).By proposing the event-triggered mechanism,in which the output of the system is sampled by a time-varying sampling period and only the necessary sampled data is transmitted through the communication network,and the network-induced delay and the packet losses are considered *** the proposed event-triggering mechanism,the closed-loop system is modelled as a time-delay *** on the model,some novel criteria in terms of linear matrix inequalities(LMIs) for co-designing both the desired DOFC and the event-triggered parameters are ***,a simulation example is employed to demonstrate the effectiveness of the proposed method.
Job shop scheduling has become the basis and core of advanced manufacturing technology. Various differences exist between academic research and practical production. The majority of previous researches on job shop sch...
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Job shop scheduling has become the basis and core of advanced manufacturing technology. Various differences exist between academic research and practical production. The majority of previous researches on job shop scheduling problem (JSSP)describe the basic production environment, which have a single objective and limited constraints. However,a practical process of production is characterized by having multiple objectives,no-wait constraint,and limited storage. Thus this research focused on multiobjective,no-wait JSSP. To analyze the problem,it was further divided into two sub-problems, namely, sequencing and timetabling. Hybrid non-order strategy and modified complete local search with memory were used to solve each problem individually. A Pareto-based strategy for performing fitness assessment was presented in this study. Various experiments on benchmark problems proved the feasibility and effectiveness of the proposed algorithm.
The problem of H fault detection filtering for a class of discrete-time nonlinear system based on T-S fuzzy model is investigated in this *** the filtering network system,packet dropout and networked time-delay are co...
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The problem of H fault detection filtering for a class of discrete-time nonlinear system based on T-S fuzzy model is investigated in this *** the filtering network system,packet dropout and networked time-delay are considered *** event-triggered communication scheme is constructed to determine whether or not the current instant data should be *** detection filter is designed to guarantee the prescribed H performance for the filtering ***,a numerical example is given to illustrate the effectiveness of the proposed design method.
Dynamic optimization problems(DOPs) described by differential equations are often encountered in chemical engineering. Deterministic techniques based on mathematic programming become invalid when the models are non-di...
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Dynamic optimization problems(DOPs) described by differential equations are often encountered in chemical engineering. Deterministic techniques based on mathematic programming become invalid when the models are non-differentiable or explicit mathematical descriptions do not exist. Recently, evolutionary algorithms are gaining popularity for DOPs as they can be used as robust alternatives when the deterministic techniques are invalid. In this article, a technology named ranking-based mutation operator(RMO) is presented to enhance the previous differential evolution(DE) algorithms to solve DOPs using control vector parameterization. In the RMO, better individuals have higher probabilities to produce offspring, which is helpful for the performance enhancement of DE algorithms. Three DE-RMO algorithms are designed by incorporating the RMO. The three DE-RMO algorithms and their three original DE algorithms are applied to solve four constrained DOPs from the literature. Our simulation results indicate that DE-RMO algorithms exhibit better performance than previous non-ranking DE algorithms and other four evolutionary algorithms.
Modern chemicalprocesses are usually characterized by large scale,multiple operation units,and high dynamic,and monitoring of these processes is *** paper proposes a genetic algorithm(GA)-regularized dynamic canonica...
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Modern chemicalprocesses are usually characterized by large scale,multiple operation units,and high dynamic,and monitoring of these processes is *** paper proposes a genetic algorithm(GA)-regularized dynamic canonical correlation analysis(DCCA)-based concurrent modeling and monitoring scheme for multi-unit dynamic ***,the DCCA modeling is performed between each unit and the entire process to characterize both cross-correlation and auto-correlation among ***,the GA regularization is performed for each unit to explore communicating variables and reduce the communication *** a residual-based local fault detector is established for each unit,which performs fault detection by considering both the variables of the local unit and the information provided by its related units,and therefore exhibits superior monitoring *** proposed monitoring scheme is applied on a numerical example and an industrial tail gas treatment *** results demonstrate the feasibility and efficiency of the proposed approach.
This paper is concerned with the stabilization and H control problem for a class of continuous-time networked control systems(NCSs) with random time-delay modeled as a Markov process with incomplete transition *** r...
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This paper is concerned with the stabilization and H control problem for a class of continuous-time networked control systems(NCSs) with random time-delay modeled as a Markov process with incomplete transition *** research motivation is to achieve numerical testable stabilization ***,the stochastic stabilization of the underlying NCS with jumping parameters is investigated by transferring the original system into a singular one,which has equivalent mean square ***,based on the results of stabilization,the H disturbance attenuation is further *** sufficient conditions are presented in the form of standard linear matrix inequalities(LMIs),which is rarely reported in the existing ***,a numerical example is given to demonstrate the effectiveness of the main results.
Dissociation of methyl nitrite is the first step during CO catalytic coupling to dimethyl oxalate followed by hydrogenation to ethyl glycol in a typical coal to liquid process. In this work, the first-principle calcul...
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Dissociation of methyl nitrite is the first step during CO catalytic coupling to dimethyl oxalate followed by hydrogenation to ethyl glycol in a typical coal to liquid process. In this work, the first-principle calculations based on density functional theory were performed to explore the reaction mechanism for the non-catalytic dissociation of methyl nitrite in the gas phase and the catalytic dissociation of methyl nitrite on Pd(111) surface since palladium supported on alpha-alumina is the most effective catalyst for the coupling. For the non-catalytic case, the calculated results show that the CH_3O–NO bond will break with a bond energy of 1.91 eV, and the produced CH_3O radicals easily decompose to formaldehyde, while the further dissociation of formaldehyde in the gas phase is difficult due to the strong C–H bond. On the other hand, the catalytic dissociation of methyl nitrite on Pd(111) to the adsorbed CH_3O and NO takes place with a small energy barrier of 0.03 eV. The calculated activation energies along the proposed reaction pathways indicate that(i) at low coverage, a successive dehydrogenation of the adsorbed CH_3O to CO and H is favored while(ii) at high coverage, hydrogenation of CH_3O to methanol and carbonylation of CH_3O to methyl formate are more preferred. On the basis of the proposed reaction mechanism,two meaningful ways are proposed to suppress the dissociation of methyl nitrate during the CO catalytic coupling to dimethyl oxalate.
Aiming at the compensation issues of the random communication delay in networked control systems,this paper proposes a method to design the time-delay compensation controller based on generalized predictive *** compen...
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ISBN:
(纸本)9781509009107
Aiming at the compensation issues of the random communication delay in networked control systems,this paper proposes a method to design the time-delay compensation controller based on generalized predictive *** compensation controller consists of the network predictor and the time-delay compensator,which is used to make up for the delay with different *** from the traditional determination method,the control parameters depend on the random delay is given in this paper,which can improve the system ***,the stability conditions of the closed-loop control system are also *** True Time toolbox to simulate the real network communication,both of fixed delay and stochastic delay in networked environment are considered to analyze the compensating performance,and the corresponding effect of different control *** simulated results illustrate a better performance of the varying-parameter compensation controller than the fixed one.
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