نتایج جستجو برای: spectrum function
تعداد نتایج: 1411409 فیلتر نتایج به سال:
In this research oxidation kinetic panceuo.s (P.S) by S2O8-2 at the presence of AgNO3 ascatalyst was studied.The method was spectrophotometer following absorption spectrum (P.S) inwave length of 518 nm. After improving the condition such as PH, P.S concentration, K2S2O8concentration, ionic strength, temperature, rate constant, activation energy, constant frequency,order reaction and thermo dyna...
Objectives: Autism Spectrum Disorder (ASD) is a group of neurodevelopment syndromes with impairments in social communications and restrictive or repetitive behaviors. Neurofeedback is a new method that may regulate neuro and metabolic function in brain. This study is semi-experimental, with pre and post test. Methods: In 26 children with ASD, 40 sessions of Neurofeedback were done. Brain...
Capability to simulate the coherence function is important when tuning an interference microscope in an effort to reduce sidelobes in interference signals. The coherence function cannot directly be derived from the light source spectrum since the microscope's effective spectrum is affected by e.g. spatial coherence effects. We show this by comparing the true system spectrum measured using a spe...
the objective of this study is development of driver’s sleepiness using visually evoked potentials (vep). vep computed from eeg signals from the visual cortex. we use the steady state veps (ssveps) that are one of the most important eeg signals used in human computer interface systems. ssvep is a response to visual stimuli presented. we present a classification method to discriminate between cl...
Optical spectrum analysis is the most direct and effective method for characterizing electro-optic modulation spectra. According to Rayleigh criterion, best resolution of an optical limited by point spread function analyzer (OSA) relative intensity closely spaced spectral lines. In this paper, we propose a boosted iterative deconvolution (BID) resolve intrinsic lines from measured carrier our s...
The objective of this study is development of driver’s sleepiness using Visually Evoked Potentials (VEP). VEP computed from EEG signals from the visual cortex. We use the Steady State VEPs (SSVEPs) that are one of the most important EEG signals used in human computer interface systems. SSVEP is a response to visual stimuli presented. We present a classification method to discriminate between...
In this paper, we investigate the phonon transmission coefficient of a mass-spring in the presence of Kohn interaction by using Green’s function method within the harmonic approximation. This system is embedded between two simple phononic leads including only the nearest neighbor interactions. The results show that the presence of Kohn and the nearest neighbor interactions in the center wire m...
The interference constraints of genetic spectrum assignment model in cognitive radio networks are analyzed in this paper. An improved genetic spectrum assignment model is proposed. The population of genetic algorithm is divided into two sets, the feasible spectrum assignment strategies and the randomly updated spectrum assignment strategies. The penalty function is added to the utility function...
Single crystals of nonlinear optical material bis (guanidinium) hydrogen phosphate monohydrate (G2HP) belonging to non centrosymmetric space group P 21c were successfully grown by the slow evaporation method. Optical transmittance and second harmonic generation of the grown crystals have been studied by UV-vis-NIR spectrum and Kurtz powder technique respectively. The transmittance of G2HP cryst...
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