نتایج جستجو برای: initial and constant

تعداد نتایج: 16868391  

S. Dhawan, S. Kumar

Solitons are ubiquitous and exist in almost every area from sky to bottom. For solitons to appear, the relevant equation of motion must be nonlinear. In the present study, we deal with the Korteweg-deVries (KdV), Modied Korteweg-de Vries (mKdV) and Regularised LongWave (RLW) equations using Homotopy Perturbation method (HPM). The algorithm makes use of the HPM to determine the initial expansion...

Journal: :محیط شناسی 0
رازقه اخباری زاده دانشجوی کارشناسی ارشد مهندسی معدن و عضو انجمن پژوهشگران جوان محمدرضا شایسته فر دانشیار بخش مهندسی معدن، پژوهشکدة انرژی و محیط زیست دانشگاه شهید باهنر کرمان، اسماعیل دره زرشکی مربی پژوهشکده صنایع معدنی و پژوهشکدة انرژی و محیط زیست دانشگاه شهید باهنر کرمان

in this study, iron oxide nanoparticles (maghemite) were used to remove ni (ii) and cr (vi) from mine’s waste water. first, by using novel single step, maghemite nanoparticles (?-fe2o3) produced at room temperature, without the use of natural solvents and oxides. the average particle size of the maghemite was estimated to be 14 nm, by transition electron microscope (tem(. various factors influe...

M.I.A Othman S.M Said,

The three-phase-lag model and Green–Naghdi theory without energy dissipation are employed to study the deformation of a two-temperature fiber-reinforced medium with an internal heat source that is moving with a constant speed under a hydrostatic initial stress and the gravity field.  The modulus of the elasticity is given as a linear function of the reference temperature. The exact expressions ...

In this research new catalyst prepared by supporting ZnFe2O4 on Copper Slag (CS) and characterization of this catalyst was done by using Scanning Electron Microscopy (SEM) image, Energy-Dispersive X-ray (EDX) spectroscopy, BET surface area, and X-Ray Diffraction (XRD) patterns. UV + H2O2 processes by ZnFe2O4...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده اقتصاد و علوم اجتماعی 1389

چکیده: پژوهش حاضر به بررسی تطبیقی اعتماد اجتماعی در بین دبیران زن و مرد مقطع راهنمایی شهر ایلام می پردازد. امروزه در جوامع شاهد گسترش ارتباطات هستیم و با توجه به این که دامنه کنش های اجتماعی از حد روابط با آشنایان و دوستان فراتر رفته و به تعامل با کنشگران غربیه و نا آشنا گسترش یافته است، لزوم وجود اعتماد، بیش از پیش احساس می شود. اما با توجه به نقش دبیران در نهادهای آموزشی، در انتقال ارزش ها و...

Journal: :acta medica iranica 0
m. rasoolinejad m. hajabdolbaghi m. mohraz n. zarinfar s. a. mohajerani

current mainstay of treatment for human immunodeficiency virus (hiv)-infected patients is highly active antiretroviral therapy (haart) but little is known about the long-term clinical outcome for hiv-infected patients who have received haart. determining factors associated with longterm survival in the course of treatment may allow modification to be made for patients who are at a greater risk ...

Journal: :iranian journal of health sciences 0
a zarei e bazrafshan 2- health promotion research center, zahedan university of medical sciences, zahedan, iran r khaksefidi 1- student scientific research center of zahedan university of medical sciences, zahedan, iran m alizadeh 1- student scientific research center of zahedan university of medical sciences, zahedan, iran

background and purpose: phenol is one of prevalent contaminants found in many industrial wastewaters. the combination with special features, such as high toxicity, carcinogenic properties, vitality gathering ability, low biodegradation potentiality and others, based on the u.s environmental protection agency, classified as a priority pollutant. the purpose of this study was to determine the eff...

Journal: :international journal of industrial mathematics 0
s. dhawan department of mathematics, dr. b. r. ambedkar national institute of technology jalandhar, india. s. kumar department of mathematics, dr. b. r. ambedkar national institute of technology jalandhar, india.

solitons are ubiquitous and exist in almost every area from sky to bottom. for solitons to appear, the relevant equation of motion must be nonlinear. in the present study, we deal with the korteweg-devries (kdv), modi ed korteweg-de vries (mkdv) and regularised longwave (rlw) equations using homotopy perturbation method (hpm). the algorithm makes use of the hpm to determine the initial expansio...

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