نتایج جستجو برای: pulses

تعداد نتایج: 35993  

Journal: :the modares journal of electrical engineering 2009
g.r. sowlat

in scpc-dama satellite networks, the baseband rrc pulse shaping is utilized to reduce the bandwidth and inter symbol interference (isi). but the variation in carrier's envelope, which expands the spectrum and ultimately increases the bandwidth, causes isi and quadrature channel crosstalk (qcc). the goal of this paper is to introduce a method to shape baseband rrc pulses, in order to make a near...

Mahyar Janahmadi, Toorandokht Baluchnejad Mojarad,

  While the effect of changes of stimulus waveform (quasitrapezoidal and rectangular current pulses) on nerve activation is clear, but there is no evidence on the effect of quasitrapezoidal pulses on ionic currents of cellular membrane. In the present study, the effect of depolarizing quasi-trapezoidal current pulses, in comparison with that of depolarizing rectangular current pulses, on firing...

H Pazokian, J Barzin, M Mollabashi, S Jelvani, SH Abolhoseini,

Laser irradiation parameters, especially the laser fluence and the number of pulses are very important factors affecting microstructures formation and improvement of the surface characteristics in different medical, electronic and the other industrial applications. Information about the fluence domain and the number of pulses for the formation of the structures is very important and determines ...

Journal: :journal of nanostructures 2015
z. haji jamali m. almasi kashi a. ramazani

nicu alloy nanowires arrays were embedded into the anodic aluminum oxide (aao) template by ac-pulse electrodeposition. different off-time were used in electrolyte with constant concentration of ni and cu and acidity of 3. the effect of deposition parameters on alloy contents was investigated by studying the microstructure and magnetic properties of as-deposited nicu alloy nanowires. atomic forc...

Conventional Flux Compression Generators (FCG's) are used to generate high power DC pulses. A new kind of (FCG's) with series capacitance called Capacitive Flux Compression Generator (CFCG) will be introduced and explained in this paper. This new kind is used to generate modulated high power pulses. There are some problems to establish a capacitance in high power and high frequency applications...

The increase in the number of pulses in multipulse rectifiers leads to a reduction in harmonic current distortion. But this increase in the number of pulses leads to an increase in kVA, cost, and complexity of the multi-pulse rectifiers. As a result, in industrial applications, 12-pulse rectifiers are mainly used due to their lightweight, simple transformers, and low kVA rate, and low cost. The...

Journal: :iranian journal of medical physics 0
ameneh sazgarnia assistant professor, medical physics research center, bu-ali research institute, mashhad university of medical sciences, mashhad, iran mohammad hossein bahreyni toossi professor, medical physics research center, bu-ali research institute, mashhad university of medical sciences, mashhad, iran majid valizadeh msc. in medical physics, zabol university medical sciences, zabol, iran fatemeh homaei shandiz assistant professor, radiation oncology dept., omid hospital, mashhad university of medical sciences, mashhad, iran habibollah esmaily assistant professor, community medicine & public health dept., mashhad university of medical sciences, mashhad, iran azam abbasi b.sc. in laboratory sciences, bu-ali research institute, mashhad university of medical sciences, mashhad, iran

introduction: electroporation is a practical technique used to transport the molecules across the cell membrane. the utilization of fluorescent molecules is the method widely used to evaluate the electropermeability of cell membrane as a result of pulse application. it is also possible to use mathematical methods to predict the changes caused in cell electropermeability as a result of the chang...

Ameneh Sazgarnia, Azam Abbasi Fatemeh Homaei Shandiz Habibollah Esmaily Majid Valizadeh Mohammad Hossein Bahreyni Toossi

Introduction: Electroporation is a practical technique used to transport the molecules across the cell membrane. The utilization of fluorescent molecules is the method widely used to evaluate the electropermeability of cell membrane as a result of pulse application. It is also possible to use mathematical methods to predict the changes caused in cell electropermeability as a result of the chang...

Journal: :پژوهش های حبوبات ایران 0
محمد قربانی محسن جمالی پور علیرضا کوچکی ناصر شاهنوشی

introduction earth's atmosphere plays an important role in preventing the temperature decrease. one of the principal factors of environmental pollution and the main source of earth's climate and biodiversity changes is greenhouse gas emissions from various sources, particularly agricultural sector. agriculture sector is considered as a major source of greenhouse gas sequestration, including me...

Ahmad- Reza Taheri Ameneh Sazgarnia, Hossein Eshghi, Mahin Shokouhi, Neda Attaran- Kakhki Zahra Shahamat,

Introduction Application of near-infrared absorbing nanostructures can induce hyperthermia, in addition to providing more efficient  photothermal effects. Gold-gold sulfide (GGS) is considered as one of these nanostructures. This study was performed on a tissue-equivalent optical-thermal phantom to determine the temperature profile in the presence and absence of GGS and millisecond pulses of a ...

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