نتایج جستجو برای: geometry

تعداد نتایج: 144594  

A.R. Forough , M. Nadjafikhah ,

Abstract : Let be a 2nd order ODE. By Cartan equivalence method, we will study the local equivalence problem under the transformations group of time-fixed coordinates. We are going to solve this problem by an applicable method which has been recognized by R. Gardner, and classify them.   

Journal: :Notre Dame Journal of Formal Logic 1973

Journal: :Bulletin of the American Mathematical Society 1982

Journal: :Nature 1958

Journal: :Bulletin of the American Mathematical Society 1981

Journal: :Electronic Notes in Theoretical Computer Science 2001

Journal: :Entropy 2020

Journal: :iranian journal of materials forming 2015
m. saghari a. afsari

abstracthydroforming process is a deep stretching process only with the difference that a fluid is used instead of the mandrel. this paper investigates the hydroforming process of non-cylindrical and non-spherical geometries using finite element analysis software to calculate the influences of effective process parameters such as the coefficient of friction between the surfaces and the pressure...

The ultimate goal of spatial information, both as part of technology and as science, is to answer questions and issues related to space, place, and location. Therefore, geometry is widely used for description, storage, and analysis. Undoubtedly, one of the most essential features of spatial information is geometric features, and one of the most obvious types of analysis is the geometric type an...

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