Results 171 to 180 of about 289 (216)
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MATHEMATICAL ROTATION OF ORIENTATION DATA
Geological Society of America Bulletin, 1964Three-dimensional rotation, usually done graphically with a stereographic or equal-area net, may be performed mathematically by means of a 3 by 3 matrix. Digital computer programs based on the matrix should be useful in structural and sedimentation studies.
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Mathematical Study on Local Fluid Rotation Axis: Vorticity is Not the Rotation Axis
2021A vortex can be intuitively recognized as the rotational/swirling motion of the fluids. The fascination of the phenomenon brought about many years of research to classify and identify the vortical structure. Vorticity was one of the first theories developed to identify the vortex.
Charles Nottage, Yifei Yu, Chaoqun Liu
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Mathematical Modeling of the Polymer Rotational Molding
Volume 1: Symposia, Parts A and B, 2007We study the rimming flow of a viscoelastic film on the inner surface of a horizontal rotating cylinder. Simple lubrication theory is applied assuming that the Reynolds number is small and the liquid film is thin. For the steady-state flow of the Upper-Convected Maxwell (UCM) fluid the mathematical model reduces to a first order nonlinear ODE for the ...
Sergei A. Fomin +4 more
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Mathematical properties of the rotational diffusion equation
Journal of Physics A: Mathematical and General, 2001Summary: An iterative scheme for the approximative solution of the Galerkin system of the linear rotational diffusion equation for the chromophore distribution in nonlinear optical polymers is formulated. Uniformly valid asymptotic steady-state solutions are obtained in terms of power series expansions in the normalized static field and the convergence
Wyller, John +2 more
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Codman's paradox of the arm rotations is not a paradox: mathematical validation
Medical Engineering & Physics, 1998Movement of a straight arm centred at the shoulder joint in three successive 90 degrees rotations, each around the respective orthogonal coordinate axis, leads to an apparently unrelated 90 degrees rotation around the longitudinal arm axis. This empirical fact is known as Codman's paradox, after a Bostonian surgeon who first reported it in 1934 ...
J C, Politti +3 more
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[Mathematical model of the rotation of cornea].
Journal francais d'ophtalmologie, 1991The aim of our study is to informatise the procedure, ie, design the computer system and software necessary to automatically define the parameters of our problem. To achieve this, we have used an image analyser which permits us to acquire and digitalise a photograph of the lesioned cornea.
I, Karpouzas, Y, Pouliquen
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Modeling Crop Rotation with Discrete Mathematics
2018The module develops discrete mathematics models that allow for creation of crop rotation schedules meeting a variety of needs.
Cartier, Jennifer +3 more
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Mathematical model of decolourization in a rotating disc reactor
Biochemical Engineering Journal, 2015Abstract This work presents a mathematical model of the biodegradation of an organic dye in a rotating disc reactor operated in a batch mode with discs coated with a mycelium of a white-rot fungus. The two-dimensional model domain represents the surface of one half of a disc. The disc is considered to be covered with two layers (biofilm, liquid film)
T. Skybová, M. Přibyl, P. Hasal
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Isomorphism of Mathematical Descriptions of the Rotation Operation
Mechanics of Solids, 2018Currently the practice of constructing various algorithms of inertial navigation, including strapdown navigation system (SINS), indicates that two mathematical methods for describing rotation are mainly used: using quaternions or direction cosines. Moreover, in SINS algorithms it is often convenient to use two of these parameter systems in parallel ...
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Mathematical optimization of rolling stock rotations
2017We show how to optimize rolling stock rotations that are required for the operation of a passenger timetable. The underlying mathematical ptimization problem is called rolling stock rotation problem (RSRP) and the leitmotiv of the thesis is RotOR, i.e., a highly integrated optimization algorithm for the RSRP. RotOR is used by DB Fernverkehr AG (DBF) in
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