Graduate University of Advanced Technology

About: Graduate University of Advanced Technology is a education organization based out in Kerman, Iran. It is known for research contribution in the topics: Carbon paste electrode & Electrochemical gas sensor. The organization has 890 authors who have published 2169 publications receiving 31027 citations.

Optimizing operation of a photovoltaic/diesel generator hybrid energy system with pumped hydro storage by a modified crow search algorithm

Abstract: In a hybrid energy system composed of photovoltaic (PV), diesel generator and pumped hydro storage (PHS), to attain minimum fuel consumption, system operation should be optimized. This paper focuses on optimizing operation of a PV/diesel/PHS hybrid energy system by a modified crow search algorithm (CSA). For this aim, fuel consumption during the considered period is defined as the objective function. At deficit conditions (when PV generation is less than load demand), percent of deficit power which should be supplied by PHS is considered as decision variable. To effectively solve this difficult optimization problem, CSA with an adaptive chaotic awareness probability (CSAAC-AP) has been proposed. Simulated results reveal that the proposed CSAAC-AP produces more accurate and robust results than genetic algorithm (GA), particle swarm optimization (PSO) and original CSA. Moreover, optimal sharing of deficit power between diesel generator and PHS leads to having minimum operation cost.

Influence of crosslinking on the mechanical behavior of 3D printed alginate scaffolds: Experimental and numerical approaches.

Abstract: Tissue scaffolds fabricated by three-dimensional (3D) bioprinting are attracting considerable attention for tissue engineering applications. Because the mechanical properties of hydrogel scaffolds should match the damaged tissue, changing various parameters during 3D bioprinting has been studied to manipulate the mechanical behavior of the resulting scaffolds. Crosslinking scaffolds using a cation solution (such as CaCl2) is also important for regulating the mechanical properties, but has not been well documented in the literature. Here, the effect of varied crosslinking agent volume and crosslinking time on the mechanical behavior of 3D bioplotted alginate scaffolds was evaluated using both experimental and numerical methods. Compression tests were used to measure the elastic modulus of each scaffold, then a finite element model was developed and a power model used to predict scaffold mechanical behavior. Results showed that crosslinking time and volume of crosslinker both play a decisive role in modulating the mechanical properties of 3D bioplotted scaffolds. Because mechanical properties of scaffolds can affect cell response, the findings of this study can be implemented to modulate the elastic modulus of scaffolds according to the intended application.

An annotated checklist of Iranian Mesostigmata (Acari), excluding the family Phytoseiidae

Abstract: The present checklist provides the results of a survey of collected and identified mesostigmatic mites in Iran (excluding the family Phytoseiidae) including 348 species belonging to 128 genera, 39 families, and 17 superfamilies of which one genus ( Trachyuropoda Berlese, 1888) is a new record for Iranian mite fauna. It is annotated with some corrections to specific identities which have previously reported by Iranian literature and with known geographical and habitats distributions inIran. Suborders Sejida and Trigynaspida comprise three and seven recorded species belonging to two and six genera, respectively, and Monogynaspida (except the Phytoseiidae) with 338 species belonging to 120 genera. No species of the cohorts Heatherellina and Heterozerconina has been recorded fromIran yet.