Hysteresis is a collective name for strongly nonlinear phenomena which occur in engineering, physical and economic systems. The wording 'strongly nonlinear' means that linearization cannot encapsulate the obse...
Hysteresis is a collective name for strongly nonlinear phenomena which occur in engineering, physical and economic systems. The wording 'strongly nonlinear' means that linearization cannot encapsulate the observed effects. In particular, standard linearization techniques are not applicable in the analysis of dynamical systems with hysteresis nonlinearities. Nevertheless, evolution operators of such dynamical systems typically have derivatives at many ''important'' points, which is enough to develop efficient modifications of gradient methods, linear stability analysis methods, etc. In this paper, we suggest a linearization algorithm for dynamical systems with the Preisach hysteresis operator. We present and justify an algorithm for calculation of the derivative of the Poincare map for scalar equations with a periodic solution of a simple form. We also suggest a version of this algorithm for a general class of non-periodic solutions of multi-dimensional equations with the Preisach nonlinearity.
Although there are several procedures predicting concrete compressive strength, reliable methodologies involve either extensive testing or voluminous databases. This paper presents a simple and efficient procedure to ...
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Although there are several procedures predicting concrete compressive strength, reliable methodologies involve either extensive testing or voluminous databases. This paper presents a simple and efficient procedure to evaluate the activation energy and the rate constant of concrete. These two parameters can be used for a rapid prediction of the mechanical properties of concrete and particularly the evolution of compressive strength. They also allow separation of effects due to physical phenomena such as humidity loss. The procedure uses an experimentally-determined parameter called "hardening time" as an indicator of equivalent maturity when comparing two hardening profiles. Test results from specimens of six concrete types validate the approach.
Based on the cluster multiple labeling technique, a novel cluster detection algorithm is presented as an analysis subroutine in two-and three-dimensional molecular dynamic simulations of ejecta that take place as a pl...
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Based on the cluster multiple labeling technique, a novel cluster detection algorithm is presented as an analysis subroutine in two-and three-dimensional molecular dynamic simulations of ejecta that take place as a planar shock wave encounters a free metal surface. The algorithm is described, tested, and used to detect cluster distribution of ejecta from copper and aluminum under a shock loading. The information obtained about the size, distribution, evolution of the cluster is helpful in the understanding of ejection.
The uniqueness of meromoRphic functions that share four values are investigated, some results are obtained to show that if two nonconstant entire functions share three finite values IM, then the functions necessarily ...
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The uniqueness of meromoRphic functions that share four values are investigated, some results are obtained to show that if two nonconstant entire functions share three finite values IM, then the functions necessarily share all three values CM.
The failure probability of a system can be expressed as an integral of the joint probability density function within the failure domain defined by the limit state functions of the system. Generally, it is very difficu...
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Attribute reduction is often used in simplifying decision table in rough set, but as far as a specific rule is concerned attribute value reduction. In this paper, through analyzing the nature of reduction, we have obt...
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Mobile agent and web service are promising new technologies with bright future, and have wide application in aspect of scientific study as well as in engineering industry. Meanwhile they both have deficiencies. The pa...
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Data mining has become of great importance owing to ever-increasing amounts of data collected by large organizations. This paper propose an data mining algorithm called Ant-Miner(I),which is based on an improvement of...
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The efficiency of transferring a pack of small-sized files or a large-sized file is very low in FTP based file transfer system. To solve this problem, we have studied the optimized method of different types of file tr...
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