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Simulation of the Internal Wave of a Subsurface Vehicle in a Two-Layer Stratified Fluid

Journal of Ocean University of China 2020年第6期19卷 1255-1264页

作者： akbarnejad baie mohammad PIROOZNIA Mahmood AKBARINASAB mohammad Department of Physical Oceanography Science and Research BranchIslamic Azad UniversityTehran ***Iran Department of Geodesy K.N.Toosi University of TechnologyTehran ***Iran Department of Physical Oceanography University of MazandaranBabol ***Iran

Internal waves are one of the various phenomena that occur at sea,and they affect acoustic equipment and sea density measurement *** this study,internal waves are simulated using computational fluid dynamics method in the presence of a submarine in a pre-stratified *** scenarios were implemented by Froude number changes and submersible velocity by using the Navier-Stokes k-εturbulence *** indicate that the realizable k-εturbulence model gives better results than the RNG k-εmodel and the internal waves flow in this model are well represented,which increases the wavelength of the internal waves by increasing the Froude number and floating velocity,while the internal angle of the Kelvin waves is *** also observe that increasing the floating velocity causes the turbulent velocity contours to increase due to the drag coefficient and its relationship with the Reynolds *** Reynolds number increases with the increasing velocity of the float *** results indicate the efficiency of this method in the discovery of subsurface objects.

关键词： internal waves numerical simulation computational fluid dynamics turbulence models

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Simulation of the Internal Wave of a Subsurface Vehicle in a Two-Layer Stratified Fluid

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中国海洋大学学报（英文版） 2020年第6期

作者： akbarnejad baie mohammad PIROOZNIA Mahmood AKBARINASAB mohammad

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Growth and Physical Properties of CdS/TiO_2 Bilayer by Plasma-Based Method

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Chinese Physics Letters 2018年第3期35卷 39-42页

作者： T.Hoseinzadeh M.Ghoranneviss E.akbarnejad Z.Ghorannevis Department of Physics Science and Research Branch Islamic Azad University Department of Physics Karaj Branch Islamic Azad University

The titanium oxide （TiO2） nanotubes have attracted attention for their use in dye-sensitized solar cells as photoanode. In this study semiconducting cadmium sulfide （CdS） nanoparticles arc grown on top opened TiO2 nanotubes arrays by radio-frequency magnetron sputtering. X-ray diffraction, scanning electron mieroscopy, transmission electron microscopy and diffuse reflection spectra are used to study structural, morphological and optical properties of the CdS/TiO2 bilayer.

关键词： CdS TiO Growth and Physical Properties of CdS/TiO2 Bilayer by Plasma-Based Method

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Genetic analysis of polymerase complex(PA,PB1 and PB2) genes of H9N2 avian influenza viruses from Iran(1999 to 2009)

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Asian Pacific Journal of Tropical Biomedicine 2012年第11期2卷 858-862页

作者： Masoud Soltanialvar Reza Goodarzi Farshad akbarnejad Department of Avian Diseases Faculty of AgricultureIslamic Azad University Department of Avian Pathology Islamic Azad University

Objective:To determine the molecular characterization of Polymerase complex(PA,PB1 and PB2) genes of H9N2 avian influenza viruses and the genetic relalionsliip of Iranian H9N2 viruses and other Asian ***:The Polymerase complex(PA,PBl and PB2) genes from seven isolates of H9N2 viruses isolated from commercial chickens in Iran during 2008-2009 were amplified(by RT-PCR method) and *** sequences(Open Reading Frame: orf) of the PA,PBl and PB2 genes were used for phylogenetic tree ***:Most PB2 and PA genes of the H9N2 viruses isolated in 2008-2009 belonged to the unknown avian sublineage which grouped with the 2004 Pakistani H7N3 *** PBl genes of Iranian viruses indicated greater genetic diversity and shared a high level of similarity to PBl genes from either HS or H7 subtypes with compared to established H9N2 Eurasian ***:Our findings demonstrated that the H9N2 viruses in Iran exhibit striking reassortment which has led to the generation of new genotypes.

关键词： Genetic analysis Polymerase complex Avian influenza Iran

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Epidemiology of sports injuries referring to Kashan University of Medical Sciences Trauma Research Center from 2005 to 2011

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Chinese Journal of Traumatology 2014年第6期17卷 323-326页

作者： mohammad Reza Sharif Ali akbarnejad Alireza Moravveji Rasool Hamayattalab Mansour Sayyah Trauma Research Center College of Medicine Kashan University of Medical Sciences Kashan 87159- 81158 I.R. Iran

Objective： Among the injury types, sports ones constitute a considerable proportion of patients who refer to the medical centers. This research was conducted to examine the frequency of sports- related injuries referring to Kashan University of Medical Sciences Trauma Research Center from 2005 to 2011. Methods： This was a retrospective research in which existing data from the data bank of Kashan University of Medical Sciences Trauma Research Center were employed. The data were extracted from the main source by SPSS version 16.0. Variables such as age, education, occupation and gender were analyzed. Results： The highest proportion of injuries was observed in students （59.4%） followed by workers （11.8%）. Upper and lower extremities were most commonly injured. The most frequent injury was strain （35.4%）, followed by sprain （27.7%）. Conclusion： The results of this research showed that the majority of the sports trauma occurrs in students; therefore, they need more attention in regard to sports injuries. Preventive measures such as informing the coaches and teachers as well as increasing the students＇ awareness about the injury risk can decrease the incidences of sports injuries.

关键词： Athletic injuries Epidemiology Kashan

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