نتایج جستجو برای: value problem

تعداد نتایج: 1532417  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز 1388

موشکی که برای پروژه انتخاب شده است، یک موشک زمین به زمین با قیود شرطی مربوط به زاویه حمله و سرعت نهائی و همچنین شرایط مربوط به مسیر پرواز و متغیر کنترل می باشد. معادلات حرکتی موشک، معادلات مشروط و غیر خطی در صفحه دو بعدی می باشد. متغیر های کنترل، دامنه تراست و زاویه حمله می باشد . موشک باید به سمت هدفی ثابت در مینیمم زمان و با مصرف مینیمم سوخت حمله کند، بنابراین هدف یافتن مسیری می باشد که موش...

Journal: :Journal of Mathematical Analysis and Applications 1998

Journal: :international journal of nano dimension 0
a. oveysi sarabi department of mechanical engineering, east azerbaijan science and research branch, islamic azad university, tabriz, iran. a. ghanbari department of mechanical engineering, east azerbaijan science and research branch, islamic azad university, tabriz, iran.

due to high surface-to-volume ratio of nanoscale structures, surface stress effects have a significant influence on their behavior. in this paper, a two-dimensional problem for an elastic layer that is bonded to a rigid substrate and subjected to an inclined concentrated line load acting on the surface of the layer is investigated based on gurtin-murdoch continuum model to consider surface stre...

Journal: :bulletin of the iranian mathematical society 0
a. amini harandi university of shahrekord, iran

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.

پایان نامه :دانشگاه تربیت معلم - تهران - دانشکده روانشناسی و علوم تربیتی 1391

the purpose of this study was the relationship between problem – solvi ability with fdi cognitive style of students.the research method was correlation method. for data analysis pearson test was used. statistical society in this research was all the students of alligoodarz city in 1391-92 year.to sampling of statiscal population was used sampling multi-stage random the size of sample selected 2...

Journal: :Proceedings of the Japan Academy, Series A, Mathematical Sciences 1968

Journal: :mathematics interdisciplinary research 0
seyfollah mosazadeh university of kashan

in this paper, we investigate some properties of eigenvalues and eigenfunctions of boundary value problems with separated boundary conditions. also, we obtain formal series solutions for some partial differential equations associated with the second order differential equation, and study necessary and sufficient conditions for the negative and positive eigenvalues of the boundary value problem....

Journal: :bulletin of the iranian mathematical society 2013
a. amini harandi

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.

Journal: :iranian journal of mathematical chemistry 2013
a. shokri abbas ali shokri

in this paper, we introduce the new class of implicit l-stable generalized hybrid methods forthe numerical solution of first order initial value problems. we generalize the hybrid methodswith utilize ynv directly in the right hand side of classical hybrid methods. the numericalexperimentation showed that our method is considerably more efficient compared to wellknown methods used for the numer...

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