The barrel vaults are composed of member elements arranged on a cylindrical surface. This kind of structure is utilized to cover the long spans. In this paper, the hybrid charge system search and particle swarm optimization algorithm is improved and utilized to optimal design of single-layer barrel vault frames. Some modifications on parameter values are performed to enhance the performance of ...

In this paper, a new Hybrid Charged System Search and Particle Swarm Optimization, HCSSPSO, is presented. Although Particle Swarm Optimization (PSO) has many advantages, including directional search, it has also some disadvantages resulting in slow convergence rate and low performance. On the other hand, the Charged System Search (CSS) is a robust optimization algorithm which has been successfu...

It is well known that damaged structural members may considerably alter the behaviour of the structures. Careful observation of these changes has often been viewed as a means to identify and assess the location and severity of damages in structures. Among the responses of a structure, natural frequencies and mode shapes are both relatively easy to obtain and independent from external excitation...

purpose: the current study aimed to compare mental disorders in two groups of prisoners charged with premeditated murder and kidnapping. materials and methods: this descriptive study followed a casual-comparative design. the sample of this study included 60 prisoners charged with premeditated murder and 60 prisoners charged with kidnapping selected using simple random sampling method (sortation...

A tetra-n-butylammonium (TBA) salt of a γ-Keggin -6-charged germanodecatungstate, [γ-H(2)GeW(10)O(36)](6-) (I), could act as an efficient homogeneous catalyst for Knoevenagel condensation of active methylene compounds with carbonyl compounds.

Tevatron is currently the only place where we can search for not only the standard model (SM) Higgs boson but also non-SM Higgs bosons. CDF and DØ have started searching for the exotic Higgs bosons including supersymmetric Higgs bosons and doubly charged Higgs bosons. DØ recently updated the results of the minimal supersymmetric standard model (MSSM) Higgs boson search using hbb̄ → bb̄bb̄ final st...