Results 31 to 40 of about 743,734 (173)
Decoherence of Macroscopic Closed Systems within Newtonian Quantum Gravity
, 1998 A theory recently proposed by the author aims to explain decoherence and the thermodynamical behaviour of closed systems within a conservative, unitary, framework for quantum gravity by assuming that the operators tied to the gravitational degrees of ...
Bernard S Kay +8 more
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Minimal surfaces and eigenvalue problems
, 2013 We show that metrics that maximize the k-th Steklov eigenvalue on surfaces with boundary arise from free boundary minimal surfaces in the unit ball. We prove several properties of the volumes of these minimal submanifolds.
Fraser, Ailana, Schoen, Richard
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, 2012 We prove that toric cubes, which are images of $[0,1]^d$ under monomial maps, are the closures of graphs of monotone maps, and in particular semi-algebraically homeomorphic to closed balls.
Basu, Saugata +2 more
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Lubricants, 2022 The contact characteristics of angular contact ball bearings are closely related to the thermal failure of high-speed spindle systems. This paper establishes a closed-loop iterative model for analyzing the ball–race contact characteristics of machine ...
Yanfang Dong +4 more
doaj +1 more source
Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2019 A digital hydraulic cylinder that uses mechanical closed-loop feedback regulation to realize double closed-loop control of displacement and velocity is designed in this study.
Yimin XIA +4 more
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The volume of random polytopes circumscribed around a convex body
, 2014 Let $K$ be a convex body in $\mathbb{R}^d$ which slides freely in a ball. Let $K^{(n)}$ denote the intersection of $n$ closed half-spaces containing $K$ whose bounding hyperplanes are independent and identically distributed according to a certain ...
Fodor, Ferenc +2 more
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RELATIVELY WEAKLY OPEN SETS IN CLOSED BALLS OF $C^*$-ALGEBRAS [PDF]
Journal of the London Mathematical Society, 2003 The main result is that for an infinite-dimensional \(C^\ast\)-algebra, any relatively weakly open subset of the unit ball has diameter 2. The corresponding result for uniform algebras was proved by \textit{O. Nygaard} and \textit{D. Werner} [Arch. Math. 76, No. 6, 441--444 (2001; Zbl 0994.46006)].
Becerra Guerrero, Julio +2 more
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Applied Sciences, 2022 Ball valves are widely used as flow control devices wherein a hollow, perforated ball pivots to control the liquid flowing through it. Due to a simple structure and only a quarter-turn of the stem required for either a fully open or fully closed state ...
Hyo-Lim Kang +2 more
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Rigid ball-polyhedra in Euclidean 3-space
, 2012 A ball-polyhedron is the intersection with non-empty interior of finitely many (closed) unit balls in Euclidean 3-space. One can represent the boundary of a ball-polyhedron as the union of vertices, edges, and faces defined in a rather natural way.
F Aurenhammer +12 more
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SINGLE OBJECTIVE OPTIMIZATION OF CLOSED BALL MILLING CIRCUIT OF ESFORDI PHOSPHATE PLANT [PDF]
مجله مدل سازی در مهندسی, 2013 The subject of this project is optimization of closed ball-mill circuit at Esfordi phosphate plant, based on integration of process simulation and genetic algorithm (GA) concepts.
Z.S. Mirzaei, A. Farzanegan
doaj +1 more source