نتایج جستجو برای: derivative

تعداد نتایج: 63713  

Journal: :فیزیک زمین و فضا 0
کمال علمدار دانشکده مهندسی معدن و متالورژی، دانشگاه یزد- کارشناس ارشد عبدالحمید انصاری دانشکده مهندسی معدن و متالورژی، دانشگاه یزد- عضو هیئت علمی

potential fields are due to complex distribution of sources related to susceptibility and mass density variations for magnetic and gravity field respectively. in researching the lateral heterogeneous of different geological bodies, in particular their edge location potential field has some advantages. we mainly refer to linear features such as fault, folding axis, dyke, trend and border of the ...

Purpose: In this study, we have focused on antibacterial effect of newly synthesized thiazole, imidazole and tetrahydropyrimidine derivatives in Iran on listeria monocytogenes. Materials and Methods: For evaluation of antibacterial effect, the disk diffusion method was applied to measure the growth inhibition zone diameter and broth micro dilution was performed to determine the minimum inhib...

Journal: :iranian journal of science and technology (sciences) 2010
t. yeloglu

in this paper, simultaneous control of source terms is considered in a vibrational string problem.in the considered problem, the terms to be controlled are the force and the initial velocity functions. we statethe generalized (weak) solution about the considered problem. the existence and uniqueness of the solutionfor optimal control problem is investigated. the frechet derivative of the functi...

Journal: :iranian journal of science and technology (sciences) 2015
b. bidabad

a projective parameter of a geodesic as solution of certain ode is defined to be a parameter which is invariant under projective change of metric. using projective parameter and poincaré metric, an intrinsic projectively invariant pseudo-distance can be constructed. in the present work, solutions of the above ode are characterized with respect to the sign of parallel ricci tensor on a finsler s...

Journal: :acta medica iranica 0
mohammad reza pourmand biotechnology research center, tehran university of medical sciences, tehran, iran. masoud yousefi department of pathobiology, faculty of public health, tehran university of medical sciences, tehran, iran. seyed alireza salami department of horticulture, faculty of agriculture, university of tehran, tehran iran. mohsen amini department of chemistry, pharmacy and pharmaceutical sciences research center, tehran university of medical sciences, tehran, iran.

staphylococcus aureus causes a wide variety of infections worldwide. methicillin-resistant s. aureus is one of most common causes of nosocomial and community acquired infections. the fluoroquinolones are an important class of antibiotics that used to treat infections caused by s. aureus. today, a significant increase in the rate of ciprofloxacin resistance in methicillin-resistant s. aureus str...

Journal: :iranian journal of pharmaceutical research 0
maliheh mamashli department of biology, school of sciences, tehran university of payame noor, tehran, iran. mina ramezani department of biology, school of sciences, islamic azad university, ashtian branch, tehran, iran. maliheh parsa department of toxicology and pharmacology, faculty of pharmacy, tehran university of medical sciences (tums), tehran, iran. seyyed nasser ostad department of toxicology and pharmacology, faculty of pharmacy and pharmaceutical sciences research center, tehran university of medical sciences (tums), tehran, iran.

enamel matrix derivative emdogain (emd) is widely used in periodontal treatment in spite of the fact that its effect on the developing embryo has not been elucidated. the aim of this study was to investigate the teratogenic effect of emd on the rat embryo neural crest cells. the neural crest is a unique population of cells that migrates from the dorsal neural tube along defined pathways and pro...

Journal: :نظریه تقریب و کاربرد های آن 0
a. neamaty department of mathematics, university of mazandaran, babolsar, iran b. agheli department of mathematics, qaemshahr branch, islamic azad university, qaemshahr, iran r. darzi department of mathematics, neka branch, islamic azad university, neka, iran

in this work, we have applied elzaki transform and he's homotopy perturbation method to solvepartial di erential equation (pdes) with time-fractional derivative. with help he's homotopy per-turbation, we can handle the nonlinear terms. further, we have applied this suggested he's homotopyperturbation method in order to reformulate initial value problem. some illustrative examples...

A novel nonlinear fractional order sliding mode controller is proposed to control the chaotic atomic force microscope system in presence of uncertainties and disturbances. In the design of the suggested fractional order controller, conformable fractional order derivative is applied. The stability of the scheme is proved by means of the Lyapunov theory based on conformable fractional order deriv...

Journal: :journal of sciences islamic republic of iran 0

a series of amino derivative of 1-indene and 9-fluorene have been synthesized from their corresponding iminium salt, generated in situ in the concentrated ethereal lithium perchlorate solution, and 1-indenyl or 9-fluorenyl anions. the yields of the reactions depend on the kind of anion. addition of 1-indeny anion to the iminium salt gives the amino derivative of 1-indene, while addition of fluo...

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