This article investigates the problem of dynamic spectrum access with statistical quality of service (QoS) provisioning for dynamic canonical networks, in which the channel states are time-varying. In the most existing work, the commonly used optimization objective is to maximize the expectation of a certain metric (e.g., throughput or achievable rate). However, it is realized that expectation ...

A Smarandache multi-space is a union of n spaces A 1 , A 2 , · · · , A n with some additional conditions holding. Combining Smarandache multi-spaces with classical metric spaces, the conception of multi-metric space is introduced. Some characteristics of a multi-metric space are obtained and Banach's fixed-point theorem is generalized in this paper.

A Smarandache multi-space is a union of n spaces A1, A2, · · · , An with some additional conditions holding. Combining Smarandache multi-spaces with classical metric spaces, the conception of multi-metric spaces is introduced. Some characteristics of multimetric spaces are obtained and the Banach’s fixed-point theorem is generalized in this paper.

We derive general analytic formulae for the power spectrum and spectral index of the curvature perturbation produced during inflation driven by a multi-component inflaton field, up to the second order in the slow-roll approximation. We do not assume any specific properties of the potential or the metric on the scalar field space, except for the slow-roll condition, Einstein gravity, and the abs...

despite the growing use of evolutionary multi-objective optimization algorithms in different categories of science, these algorithms as a powerful tool in portfolio optimization and specially solving multi-objective portfolio optimization problem is still in its early stages. in this paper, moeas have been used for solving multi-objective portfolio optimization problem in tehran stock market. f...

This paper tackles the notable concept of automated trust negotiation and presents preliminary results on its integration in the realm of multi-agent systems. First, a review of the relevant literature on automated trust negotiation is given and basic ideas are discussed. Then, a motivated introduction of a novel protocol for automated trust negotiation in multi-agent systems is presented and t...

How to quantitatively compare the performance of different algorithms is one of the most important issues in multi-objective optimization. There are a number of metrics for evaluating the performance of a multi-objective optimizer that approximates the whole efficient front. However, for evaluating the quality of a preferred subset of the efficient front, the existing metrics are inadequate. In...