Results 251 to 260 of about 283,093 (291)
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Systemic Arterial Stiffness in Glaucoma Patients
Journal of Glaucoma, 2008To investigate systemic arterial stiffness in glaucoma patients.One hundred and forty glaucoma patients and 121 control subjects were enrolled in the study. Among these subjects, 51 glaucoma patients [normal-tension glaucoma (NTG), 31; primary open angle glaucoma or ocular hypertension (POAG/OH): 20] and 61 control subjects without glaucoma, who ...
Tatsuya, Chiba +2 more
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Solving STIFF systems by Taylor series
Applied Mathematics and Computation, 1989A new insight into the numerical solution of stiff systems of ODE's is brought by application of long Taylor series (up to 30 terms). Most of stiff problems are of the type where there is a linear ODE hidden within the stiff system of ODE's. When the hidden linear ODE is of order one, there is an exponential component in the solution.
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Variable stiffness electroactive polymer systems
The Journal of the Acoustical Society of America, 2005The invention relates to systems that provide variable stiffness and/or variable damping using an electroactive polymer transducer. Systems described herein offer several techniques that provide variable and controlled stiffness and/or damping. A transducer may be implemented using open loop control, thereby providing simple systems that inactively ...
Roy D. Kornbluth, Ronald E. Pelrine
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2013
In the previous Chap. 5 we have seen how the spatial discretization of a flexible multibody system leads to a differential-algebraic equation in time. The partitioning into two types of state variables, namely, those for the gross motion, on the one hand, and those for the elastic deformations, on the other, quite often involves widely different time ...
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In the previous Chap. 5 we have seen how the spatial discretization of a flexible multibody system leads to a differential-algebraic equation in time. The partitioning into two types of state variables, namely, those for the gross motion, on the one hand, and those for the elastic deformations, on the other, quite often involves widely different time ...
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Balanced Implicit Methods for Stiff Stochastic Systems
SIAM Journal on Numerical Analysis, 1998This paper addresses the need for numerical methods that accurately approximate the solution of a stiff system of stochastic differential equations (SDEs) where stiffness arises in the stochastic terms. First the solution of a one-dimensional stiff Itô SDE with multiplicative noise \[ dx_t= \sigma X_tdW_t \] is approximated by a new implicit method ...
Milstein, Grigori N. +2 more
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Adaptive Stiffness Design for Multimaterial Structural System
Journal of Intelligent Material Systems and Structures, 2003Stiffness is one of the basic characteristics of structural system, and is an important feature for structural design problems. Although it has been often recruited as the design objective or constraints, the structural optimality attained has guarantee only for the mechanical conditions considered at the design stage.
Masao Tanaka +2 more
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Stiffness Coefficients of Layered Soil Systems
Journal of Geotechnical Engineering, 1990One of the most important dynamic properties required in the design of machine foundations is the stiffness or spring constant of the supporting soil. For a layered soil system, the stiffness obtained from an idealization of soils underneath as springs in series gives the same value of stiffness regardless of the location and extent of individual soil ...
Sridharan, A, Gandhi, NSVV, Suresh, S
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An Initialization Program for Separably Stiff Systems
SIAM Journal on Scientific and Statistical Computing, 1983Initialization of a separably stiff system of ordinary differential equations consists of readjusting certain initial values, while holding the others fixed, in such a way that the solution of the system does not have an initial transient. This paper discusses the features of a FORTRAN program which solves the initialization problem. The algorithm used
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Assembling the System Stiffness Matrix
2016Having decomposed the structures into nodes and elements, it is clear that knowing the nodal displacements will give us the internal loads in the elements. The displacements at the closed degrees of freedom are known, but we must still compute the displacements at the open degrees of freedom.
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