نتایج جستجو برای: first solution
تعداد نتایج: 1832278 فیلتر نتایج به سال:
abstract nowadays, the science of decision making has been paid to more attention due to the complexity of the problems of suppliers selection. as known, one of the efficient tools in economic and human resources development is the extension of communication networks in developing countries. so, the proper selection of suppliers of tc equipments is of concern very much. in this study, a ...
in this paper, some basic results concerning strict, nonstrict inequalities, local existence theorem and differential inequalities have been proved for an ivp of first order hybrid random differential equations with the linear perturbation of second type. a comparison theorem is proved and applied to prove the uniqueness of random solution for the considered perturbed random differential equ...
attempts have been made to study the thermodynamic behavior of 1,3 butadiene purification columns with the aim of retrofitting those columns to more energy efficient separation schemes. 1,3 butadiene is purified in two columns in series through being separated from methyl acetylene and 1,2 butadiene in the first and second column respectively. comparisons have been made among different therm...
معادلات انتگرال دیفرانسیل در مدل بندی مسائلی کاربردی چون انتقال گرما، پدیده انتشار و پخش نوترون مورد استفاده قرار می گیرند و نیز در برخی کاربردهای فیزیک و زیست شناسی و مهندسی استفاده وافر دارند و به تبع آن معادلات انتگرال دیفرانسیل فازی نیز مورد توجه قرار گرفته اند. معادله انتگرال دیفرانسیل غیر خطی زیر را در نظر می گیریم. در صورتی که توابع معلوم a(t)و k(t,s,x(t)) و f(t,x(t)) توابعی ف...
purpose: the purpose of this research was to determine the prevalence of mandibular first premolar teeth with 2 canals in the population of kerman. methods & materials: a total of 280 extracted first premolar teeth were collected from several health service centers within the province of kerman.extracted teeth were stored in 10% formalin containers. each tooth was initially cleaned with water a...
a simple, sensitive and selective method for solvent extraction and spectrophotemetric determination of lanthanum (ii) europium (iii), and cerium (iii) is described , the rare earth metals are extracted into chloroform solution of n-phenylbenzohydroxamic acid (pbha) at ph 9-10 various parameters are studied to optimize the extraction conditions. the molar absorptivity is found to increase from ...
in the present study, a spectral finite element method is developed for free and forced transverse vibration of levy-type moderately thick rectangular orthotropic plates based on first-order shear deformation theory. levy solution assumption was used to convert the two-dimensional problem into a one-dimensional problem. in the first step, the governing out-of-plane differential equations are tr...
پدیده رسوب واکس در مخازن نفتی در مراحل مختلف عملیات تولید، انتقال و فرآوری مشاهده می شود. تشکیل واکس پدیده ای نامطلوب است زیرا منجر به انسداد خط لوله و تجهیزات عملیاتی می شود که در نتیجه سبب کاهش نرخ جریان و یا افت فشار زیاد می شود و به دلیل زمان وقفه تولید برای حذف آن بسیار پر هزینه است. راه حل های متفاوتی برای کاهش رسوب واکس پیشنهاد شده است که می توان به عایق کردن، تکنولوژی های تزریق مواد شیم...
background: consistency, backing process and content differences could influence cariogenic potential of foods. the aim was to compare plaque ph changes following consumption of two types of bread with different physical characteristics. methods: in this clinical trial, interproximal plaque ph of 10 volunteers with high risk of dental caries (saliva streptococcus mutans > 10 5 , high dental car...
In this paper, using the fixed point theory in cone metric spaces, we prove the existence of a unique solution to a first-order ordinary differential equation with periodic boundary conditions in Banach spaces admitting the existence of a lower solution.
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید