نتایج جستجو برای: feed axes

تعداد نتایج: 81565  

Journal: :Archives of Mining Sciences 2023

This article concerns model tests of longwall shearer with string feed system. The introduction outlined the problem exploitation thin seams, in particular hard coal and briefly described construction operation technology a single-unit system for their exploitation. modeling machines such was presented, as well author’s physical mathematical unitary shearer. Then, assumed parameters, were carri...

حسین باقری, , سعید طالبیان, ,

Background: Joint trauma and injury are the most common causes of dynamic instability. Dynamic instability has a great effect on the lumbar spine, due to its three-dimensional motions. The greatest amounts of compression and shearing force are imposed at the points of maximum torque and velocity. The changes in these phase angles upon bearing various loads can cause some pathologic conditions. ...

Journal: :Vision Research 2012
William F. Harris

Two kinds of axes are described as achromatic in the vision science literature: those of Le Grand and Ivanoff, originally proposed in the 1940s, and those of Thibos and Bradley proposed in the 1990s. Thibos-Bradley axes are based on chief nodal rays, that is, nodal rays that intersect the pupil at its center. By contrast Le Grand-Ivanoff achromatic axes are pupil independent. The purpose of thi...

Journal: :Journal of large-scale research facilities JLSRF 2015

Journal: :Communications, Faculty Of Science, University of Ankara Series A1Mathematics and Statistics 1971

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