calculated by Lewis' or Taylor's method and by using it the computed natural frequencies are usually in good agreement with the, observed frequencies. The fundamental equation is solved by Galerkin's method in the form of numerical integration.For 2 node vertical vibration, the virtual added mass is. This paper describes, firstly, an analytical method of computing the eigenvalues of vertical vibration of ships taking into account the distribution of mass, the effect of variable section and the effect of shear deflection and rotary inertia. Resource allocation is an answer to this major problem, which must be solved if systems are to become even. 1 Introduction 1.1 Load balancing The arrival of workstations networks and multicomputers has resulted in a considerable increase in available computing power, however it also results in wasted performance, due to unbalanced CPU loading. Keywords : Dynamic load balancing, modeling, queueing theory models, groups decomposition, performance evaluation. The values of these parameters can be used to define the conditions requiring migration. rates, execution times and communication speeds. Beyond two groups, we can compute the numeric values as a function of the processes' arrival. An analytical formula of the average queue length is obtained if we take two groups each with two processors. Communication speed is greater inside a group than from one group to another.

The aim of this paper is to present an original model of dynamic load balancing inside groups using queueing theory.

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