توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱AN EFFICIENT HYBRID ALGORITHM BASED ON PARTICLE SWARM AND SIMULATED ANNEALING FOR OPTIMAL DESIGN OF SPACE TRUSSES  (Text in Persian)
اطلاعات انتشار: International Journal of Optimization in Civil Engineering، اول،شماره۳، ۲۰۱۱، سال
تعداد صفحات: ۱۹
In this paper، an efficient optimization algorithm is proposed based on Particle Swarm Optimization (PSO) and Simulated Annealing (SA) to optimize truss structures. The proposed algorithm utilizes the PSO for finding high fitness regions in the search space and the SA is used to perform further investigation in these regions. This strategy helps to use of information obtained by swarm in an optimal manner and to direct the agents toward the best regions، resulting in possible reduction of the number of particles. To show the computational advantages of the new PSO–SA method، some benchmark numerical examples are studied. The PSO–SA algorithm converges to better or at least the same solutions، while the number of structural analyses is significantly reduced

۲An Improved HPSACO for Engineering Optimum Design Problems
نویسنده(ها): ، ،
اطلاعات انتشار: Asian journal of civil engineering، دوازدهم،شماره۲، Apr ۲۰۱۱، سال
تعداد صفحات: ۱۰
An improved heuristic particle swarm ant colony optimization (HPSACO) is presented tosolve engineering optimization problems. This new algorithm follows the HPSACO levels;however some modifications are performed in global and local searching levels to improveits performance. Here, the properties of the big bang–big crunch algorithm are added to PSO and ACO in global and local searching levels, respectively and these changes improveprecision of the solutions and the reliability of the algorithm. Benchmark engineeringoptimization problems are used to illustrate the reliability of the proposed algorithm.

۳Seismic Mitigation of Tall Buildings Using Magneto–Rheological Dampers
اطلاعات انتشار: Asian journal of civil engineering، دوازدهم،شماره۵، Sep ۲۰۱۱، سال
تعداد صفحات: ۱۴
In this paper, semi–active response control of tall buildings equipped with magnetorheological dampers is studied. Clipped–optimal control algorithm based on linear quadratic regulator (LQR) is employed for semi–active controller design. Bouc–Wenphenomenological model is utilized to investigate the nonlinear behavior of the MRdampers. The performance of the resulting control system is compared to the ncontrolledstructure for a benchmark building through simulation, and the efficiency of using MRdampers is evaluated.
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