نتایج جستجو برای: diffusion method

تعداد نتایج: 1762018  

1999
Takayuki Kawaguchi Norimichi Tsumura Hideaki Haneishi Yoichi Miyake

A spectral color reproduction method is proposed based on a vector error diffusion method. A low-dimensional linear model is used to approximate reflectance spectra, and the vector error diffusion is performed in a score vector space of the linear model. A suitable set of primary colors is also selected from oil colors. Presented method performed better than conventional colorimetric vector err...

Journal: :Journal of The Electrochemical Society 2023

A systematic investigation of the factors that affect lithium diffusion coefficient measurements in Atlung Method for Intercalant Diffusion (AMID) is carried out. Single crystal LiNi 0.6 Mn 0.2 Co O 2 used method development. The include electrode mass loading, separator thickness, electrolyte solvent choice and salt molarity, voltage interval sizes, open circuit relaxation time, C-rate choice,...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2003
S M Scheinhardt-Engels F A M Leermakers G J Fleer

We present a method to study mean-field stationary diffusion (MFSD) in polymer systems. When gradients in chemical potentials vanish, our method reduces to the Scheutjens-Fleer self-consistent field (SF-SCF) method for inhomogeneous polymer systems in equilibrium. To illustrate the concept of our MFSD method, we studied stationary diffusion between two different bulk mixtures, containing, for s...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سمنان 1392

in the area of vocabulary teaching and learning although much research has been done, only some of it has led to effective techniques of vocabulary teaching and many language learners still have problem learning vocabulary. the urge behind this study was to investigate three methods of teaching words. the first one was teaching words in context based on a traditional method of teaching that is,...

2017
Guoxing Lin

Pulsed-field gradient (PFG) diffusion experiments can be used to measure anomalous 7 diffusion in many polymer or biological systems. However, it is still complicated to analyze PFG 8 anomalous diffusion, particularly the finite gradient pulse width (FGPW) effect. In practical 9 applications, the FGPW effect may not be neglected such as in clinical diffusion magnetic resonance 10 imaging (MRI)....

Journal: :J. Comput. Physics 2010
Lars Ferm Andreas Hellander Per Lötstedt

We propose an adaptive hybrid method suitable for stochastic simulation of diffusion dominated reaction-diffusion processes. For such systems, simulation of the diffusion requires the predominant part of the computing time. In order to reduce the computational work, the diffusion in parts of the domain is treated macroscopically, in other parts with the tau-leap method and in the remaining part...

Journal: :فیزیک زمین و فضا 0
سرمد قادر دانشیار، گروه فیزیک فضا، مؤسسه ژئوفیزیک دانشگاه تهران، ایران علیرضا محب الحجه دانشیار، گروه فیزیک فضا، مؤسسه ژئوفیزیک دانشگاه تهران، ایران مرضیه شریفی دوست دانش آموخته کارشناسی ارشد هواشناسی، گروه فیزیک فضا، مؤسسه ژئوفیزیک دانشگاه تهران، ایران

to control the nonlinear numerical instability, throughout the time evolution of the eulerian form of the nonlinear rotating shallow water equations, it is necessary to add numerical diffusion to the solution. it is clear that, this extra numerical diffusion degrades the accuracy of the numerical solution and should be kept as small as possible. in a conventional approach a hyper-diffusion is u...

2003
Tae-Ha Kang Tae-Seung Lee Syng-Yup Ohn Byong-Won Hwang

The error diffusion method is good for reconstructing continuous tones of an image to bilevel tones. However, the reconstruction of edge information by the error diffusion is represented as weak when the power spectrum is analyzed for display error. In this paper, we present an edge enhanced error diffusion method to preprocess original images to ac...

2014
Anthony B. Murphy

The combined diffusion coefficient method is widely used to treat the mixing and demixing of different plasma gases and vapours in thermal plasmas, such as welding arcs and plasma jets. It greatly simplifies the treatment of diffusion for many gas mixtures without sacrificing accuracy. Here, three subjects that are important in the implementation of the combined diffusion coefficient method are...

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