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8篇 您的检索式:作者名="Afarideh"
    题名 作者 年代 出处 被引量
1Association of pe- ripheral 5-hydroxyindole-3-acetic acid,a serotonin derivative, with metabolic syndrome and low grade inflanmmation显示文摘Afarideh M Behdadnia A Noshad S 2015En- docr Pract2015,21,7:1
2Calculation of the importance weighted neutron generation time using MCNIC method显示文摘Feghhi S A H Shahriari M Afarideh H 2008Ann Nucl Energy2008,35,8:1
3Clinical experi- ences of using a silver hydroalginate dressing in Austria,Switzer- land and Germany显示文摘Kammerlander G Afarideh R Baumgartner A 2008J Wound Care2008,17,38:1
4Modelling plastic scintillator response to gamma rays using light transport incorporated FLUKA code显示文摘M. Ranjbar Kohan G.R. Etaati N. Ghal-Eh M.J. Safari H. Afarideh E. Asadi 2012Applied Radiation and Isotopes2012,,5:1
5Optimized feed-forward neural-network algorithm trained for cyclotron-cavity modeling显示文摘The cyclotron cavity presented in this paper is modeled by a feed-forward neural network trained by the authors' optimized back-propagation(BP) algorithm. The training samples were obtained from simulation results that are for a number of defined situations and parameters and were achieved parametrically using MWS CST software; furthermore, the conventional BP algorithm with different hidden-neuron numbers, structures, and other optimal parameters such as learning rate that are applied for our purpose was also used here. The present study shows that an optimized FFN can be used to estimate the cyclotron-model parameters with an acceptable error function. A neural network trained by an optimized algorithm therefore shows a proper approximation and an acceptable ability regarding the modeling of the proposed structure. The cyclotron-cavity parameter-modeling results demonstrate that an FNN that is trained by the optimized algorithm could be a suitable method for the estimation of the design parameters in this case.Masoumeh Mohamadian Hossein Afarideh Mitra Ghergherehchi 2017Chinese Physics C2017,41,1:0
6Electron trajectory evaluation in laser-plasma interaction for effective output beam显示文摘Using the ellipsoidal cavity model, the quasi-monoenergetic electron output beam in laser-plasma interaction is described. By the cavity regime the quality of electron beam is improved in comparison with those generated from other methods such as periodic plasma wave field, spheroidal cavity regime and plasma channel guided acceleration. Trajectory of electron motion is described as hyperbolic, parabolic or elliptic paths. We find that the self-generated electron bunch has a smaller energy width and more effective gain in energy spectrum. Initial condition for the ellipsoidal cavity is determined by laser-plasma parameters. The electron trajectory is influenced by its position, energy and cavity electrostatic potential.P. Zobdeh R. Sadighi-Bonabi H. Afarideh 2010Chinese Physics B2010,19,6:0
7Two-phase flow component fraction measurement using gamma-ray attenuation technique显示文摘Multiphase flow meters as the potential alternatives to separation and metering techniques have been in rapid development since 1980 s.Before its field operation,the instrument should be calibrated in a standard test-facility.In spite of the known medium and large scale facilities all over the world,we developed a laboratory scale instrument for component fraction measurements.It has a two-phase flow homogenizer loop with the clamp-on potential of the meters to provide a regime independent measurement.It is capable of delivering a complete homogenization by γ-ray densitometer.With an error of±5%in component fraction measurements,this instrument is appropriate for testing and calibrating other meters.Mohsen Sharifzadeh Hosein Khalafi Hosein Afarideh Ehsanallah Noori 2017Nuclear Science and Techniques2017,28,6:0
8Pulse chirping effect on controlling the transverse cavity oscillations in nonlinear bubble regime显示文摘The propagation of an intense laser pulse in an under-dense plasma induces a plasma wake that is suitable for the acceleration of electrons to relativistic energies. For an ultra-intense laser pulse which has a longitudinal size shorter than the plasma wavelength, λp, instead of a periodic plasma wave, a cavity free from cold plasma electrons, called a bubble, is formed behind the laser pulse. An intense charge separation electric field inside the moving bubble can capture the electrons at the base of the bubble and accelerate them with a narrow energy spread. In the nonlinear bubble regime, due to localized depletion at the front of the pulse during its propagation through the plasma, the phase shift between carrier waves and pulse envelope plays an important role in plasma response. The carrier–envelope phase(CEP) breaks down the symmetric transverse ponderomotive force of the laser pulse that makes the bubble structure unstable. Our studies using a series of two-dimensional(2D) particle-in-cell(PIC) simulations show that the frequency-chirped laser pulses are more effective in controlling the pulse depletion rate and consequently the effect of the CEP in the bubble regime. The results indicate that the utilization of a positively chirped laser pulse leads to an increase in rate of erosion of the leading edge of the pulse that rapidly results in the formation of a steep intensity gradient at the front of the pulse. A more unstable bubble structure, the self-injections in different positions, and high dark current are the results of using a positively chirped laser pulse. For a negatively chirped laser pulse, the pulse depletion process is compensated during the propagation of the pulse in plasma in such a way that results in a more stable bubble shape and therefore, a localized electron bunch is produced during the acceleration process. As a result, by the proper choice of chirping, one can tune the number of self-injected electrons, the size of accelerated bunch and its energy spectrum to the values required for practical applications.H Vosoughian Z Riazi H Afarideh G Sarri 2017Chinese Physics B2017,26,2:0
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