The present article investigates effects of the multi-frequency excitation on the output power of a piezomagnetoelastic energy harvester. The piezomagnetoelastic power generator is assumed to operate in the mono-stable mode. A perturbation technique based on the method of multiple scales is employed to develop an analytical solution to nonlinear differential equations governing the system dynam...

We introduce a basic framework for multi agent belief revision in heterogeneous societies where agents are required to be consistent in their beliefs on shared variables We identify several properties one may require a general multi agent belief revision operator to satisfy and show several basic implications of these requirements Our work reveals the connection between multi agent belief revis...

Following T. H. Chan, we consider the problem of approximation of a given rational fraction a/q by sums of several rational fractions a1/q1, . . . , an/qn with smaller denominators. We show that in the special cases of n = 3 and n = 4 and certain admissible ranges for the denominators q1, . . . , qn, one can improve a result of T. H. Chan by using a different approach. 2000 Mathematics Subject ...

Integrating electric vehicles (EVs) into a microgrid improves the efficiency, flexibility, and robustness of microgrids. Unfortunately, uncertainties EVs, in terms their connection/disconnection times initial SOC values, make integrating EVs microgrids more challenging issue. Contrary to standard energy management system (EMS), raises several multi-objective problems that need be solved. In thi...

In this paper, several interesting integral inequalities are presented and some open problems are proposed later on.

This paper addresses the problem of querying several databases considered as a whole. Assuming that the different databases share a common data description language, the problem that raises is to consistently answer queries even if the database contents are contradictory. The main contribution of this paper is the specification of a query-evaluator for answering closed and open queries addresse...

The goal of  this paper is to investigate the solutionand stability in random normed spaces, in non--Archimedean spacesand also in $p$--Banach spaces and finally the stability using thealternative fixed point of generalized additive functions inseveral variables.

The Malmquist productivity index evaluates the productivity change of a decision making unit (DMU) between two time periods. In this current study, a method is proposed to compute the Malmquist productivity index in several time periods (from the first to the last periods) in data envelopment analysis (DEA) and then, the obtained Malmquist productivity index is compared with Malmquist produ...