This paper presents an efficient method for updating the structural finite element model. Model updating is performed through minimizing the difference of recorded acceleration of real damaged structure and hypothetical damaged structure, by updating physical parameters in each phase using iterative process of Levenberg-Marquardt algorithm. This algorithm is based on sensitivity analysis and pr...

Background and Objectives: Health human resources is the major asset of the health system. The status of human resources in upstream and regulatory health organizations can exert high impact on the effectiveness of health policies and the performance of health system. This study, hence, was designed to explore the possible area of human resource damage to the employees of the Iranian Ministry o...

Recently, an innovative algorithm has been proposed by the authors for the identification of structural damage under unknown external excitations. However, identification accuracy of this proposed deterministic algorithm decreases under high level of measurement noise. A probabilistic approach is therefore proposed in this paper for damage identification considering measurement noise uncertaint...

The purpose of the present study is the damage detection in the thin plates in terms of the wide application of such structures in various branches of engineering such as structural, mechanical, aerospace, shipbuilding, etc. using gradient-based second-order numerical optimization techniques. The technique used for optimization in this study is the second-order Levenberg-Marquardt algorithm (SO...

Heavy economic losses and human casualties caused by destructive earthquakes around the world clearly show the need for a systematic approach for large scale damage detection of various types of existing structures. That could provide the proper means for the decision makers for any rehabilitation plans. The aim of this study is to present an innovative method for investigating the seismic vuln...

Structural damage can be identified by processing structural vibration response signals and excitation data, and thus the suitability of signal processing methods is essential to structural damage identification. To explore an intelligent signal processing method for structural damage identification, the paper integrated wavelet real-time filtering algorithm, Adaptive Neruo-Fuzzy Inference Syst...

vesicoureteral reflux (vur) is one of the most important causes of urinary tract infection and renal failure in children. it is a potentially self-limited disease. the aim of this study was to evaluate the clinical course and significant factors in children with primary vur. the medical charts of 125 infants and children (27.2 % males, 72.8% females) with all grades of primary vur were retrospe...

PURPOSE To prospectively compare indicators of structural brain damage and total cerebral blood flow in patients with late-onset dementia, subjects of the same age with optimal cognitive function, and young subjects. MATERIALS AND METHODS The institutional ethics committee approved the studies, and all participants (or their guardians) gave informed consent. The test group included 17 patient...

tehran is one of the densely populated metropolises located in earthquake-prone regions. tehran, the population of which surpasses 8 million people, is the most populated area in iran. there are historical evidences confirming that catastrophic earthquakes have destroyed the city in past years. in the present paper, our study covers all parts of tehran because there is the potential of signific...

In this study, an approach for damage detection of large-scale structures is developed by employing kinetic and modal strain energies and also Heuristic Particle Swarm Optimization (HPSO) algorithm. Kinetic strain energy is employed to determine the location of structural damages. After determining the suspected damage locations, the severity of damages is obtained based on variations of modal ...