PID controllers play an important function in determining tuning para-meters in any process sector to deliver optimal and resilient performance for non-linear,stable and unstable processes.The effectiveness of the pre...PID controllers play an important function in determining tuning para-meters in any process sector to deliver optimal and resilient performance for non-linear,stable and unstable processes.The effectiveness of the presented hybrid metaheuristic algorithms for a class of time-delayed unstable systems is described in this study when applicable to the problems of PID controller and Smith PID controller.The Direct Multi Search(DMS)algorithm is utilised in this research to combine the local search ability of global heuristic algorithms to tune a PID controller for a time-delayed unstable process model.A Metaheuristics Algorithm such as,SA(Simulated Annealing),MBBO(Modified Biogeography Based Opti-mization),BBO(Biogeography Based Optimization),PBIL(Population Based Incremental Learning),ES(Evolution Strategy),StudGA(Stud Genetic Algo-rithms),PSO(Particle Swarm Optimization),StudGA(Stud Genetic Algorithms),ES(Evolution Strategy),PSO(Particle Swarm Optimization)and ACO(Ant Col-ony Optimization)are used to tune the PID controller and Smith predictor design.The effectiveness of the suggested algorithms DMS-SA,DMS-BBO,DMS-MBBO,DMS-PBIL,DMS-StudGA,DMS-ES,DMS-ACO,and DMS-PSO for a class of dead-time structures employing PID controller and Smith predictor design controllers is illustrated using unit step set point response.When compared to other optimizations,the suggested hybrid metaheuristics approach improves the time response analysis when extended to the problem of smith predictor and PID controller designed tuning.展开更多
The paper deals with the self-defending capacity of buildings and structures against earthquakes. The idea of this conceptcomes from Hooke’s Law of elasticity published in 1678. The original deterministic concept was...The paper deals with the self-defending capacity of buildings and structures against earthquakes. The idea of this conceptcomes from Hooke’s Law of elasticity published in 1678. The original deterministic concept was converted, with the aid of reliabilityanalysis, into a probalistic form. In this way seismic resilience covers a larger field of random phenomena and becomes directlyinvolved in more engineering applications.展开更多
The paper deals with the mathematical concept of jerk created in 1825 by Carl Jacobi and introduced in 1936, forapplications purposes in dynamics by Aurel A. Beles. Extended in seismic engineering that phenomenon of d...The paper deals with the mathematical concept of jerk created in 1825 by Carl Jacobi and introduced in 1936, forapplications purposes in dynamics by Aurel A. Beles. Extended in seismic engineering that phenomenon of dynamic amplification isbased on the first law of conservation in Mechanics combined with the theory of dislocations developed by Lev Landau. Finally, thetwo study cases presented in the paper recommend this simply analysis method for advanced practical cases with any degree ofaccuracy as well as in solving some plausibility inquire as requested by ISO 13822：2010.展开更多
Rare earth arouses frequently international eyes in recent years.Public concern with rare earth and its usage.A TV reporter (hereinafter Reporter) interviewed two experts Prof.Yang Zhanfeng (hereinafter Yang),the depu...Rare earth arouses frequently international eyes in recent years.Public concern with rare earth and its usage.A TV reporter (hereinafter Reporter) interviewed two experts Prof.Yang Zhanfeng (hereinafter Yang),the deputy chief engineer of Baotou Iron&Steel Corporation (Group) and Prof.Yan Huizhong (hereinafter Yan),chief expert of Baotou Research Institute of Rare Earths.They introduced the current situation of Chinese rare earth industry.展开更多
文摘PID controllers play an important function in determining tuning para-meters in any process sector to deliver optimal and resilient performance for non-linear,stable and unstable processes.The effectiveness of the presented hybrid metaheuristic algorithms for a class of time-delayed unstable systems is described in this study when applicable to the problems of PID controller and Smith PID controller.The Direct Multi Search(DMS)algorithm is utilised in this research to combine the local search ability of global heuristic algorithms to tune a PID controller for a time-delayed unstable process model.A Metaheuristics Algorithm such as,SA(Simulated Annealing),MBBO(Modified Biogeography Based Opti-mization),BBO(Biogeography Based Optimization),PBIL(Population Based Incremental Learning),ES(Evolution Strategy),StudGA(Stud Genetic Algo-rithms),PSO(Particle Swarm Optimization),StudGA(Stud Genetic Algorithms),ES(Evolution Strategy),PSO(Particle Swarm Optimization)and ACO(Ant Col-ony Optimization)are used to tune the PID controller and Smith predictor design.The effectiveness of the suggested algorithms DMS-SA,DMS-BBO,DMS-MBBO,DMS-PBIL,DMS-StudGA,DMS-ES,DMS-ACO,and DMS-PSO for a class of dead-time structures employing PID controller and Smith predictor design controllers is illustrated using unit step set point response.When compared to other optimizations,the suggested hybrid metaheuristics approach improves the time response analysis when extended to the problem of smith predictor and PID controller designed tuning.
文摘The paper deals with the self-defending capacity of buildings and structures against earthquakes. The idea of this conceptcomes from Hooke’s Law of elasticity published in 1678. The original deterministic concept was converted, with the aid of reliabilityanalysis, into a probalistic form. In this way seismic resilience covers a larger field of random phenomena and becomes directlyinvolved in more engineering applications.
文摘The paper deals with the mathematical concept of jerk created in 1825 by Carl Jacobi and introduced in 1936, forapplications purposes in dynamics by Aurel A. Beles. Extended in seismic engineering that phenomenon of dynamic amplification isbased on the first law of conservation in Mechanics combined with the theory of dislocations developed by Lev Landau. Finally, thetwo study cases presented in the paper recommend this simply analysis method for advanced practical cases with any degree ofaccuracy as well as in solving some plausibility inquire as requested by ISO 13822：2010.
文摘Rare earth arouses frequently international eyes in recent years.Public concern with rare earth and its usage.A TV reporter (hereinafter Reporter) interviewed two experts Prof.Yang Zhanfeng (hereinafter Yang),the deputy chief engineer of Baotou Iron&Steel Corporation (Group) and Prof.Yan Huizhong (hereinafter Yan),chief expert of Baotou Research Institute of Rare Earths.They introduced the current situation of Chinese rare earth industry.
