A genetic tests synthesis algorithm for the synchronous digital circuits, based on solving the problem of integer optimization with a scalar objective function is presented. A decomposition strategy of the circuit under test and symbolic representation of its fragments obtained. New objective function with global optimum which is the test sequence developed. Experimental results confirmed the e...

A new analytical tool for determining the optimum frequency for a micromixing strategy to mix two fluids across their interface is presented. The frequency dependence of the flux is characterized in terms of a Fourier transform related to the apparatus geometry. Illustrative microfluidic mixing examples based on electromagnetic forcing and fluid pumping strategies are presented.

An unusual dinuclear Yb(2) complex isolated using a mixed ligand strategy leads to field-induced SMM behaviour. Low magnetic axiality and a large tunnelling gap lead to significant quantum tunnelling of the magnetisation, which was reduced under an applied static optimum field of 1600 Oe.

Iran is one f the biggest oil producer and exporter of the world. Due to the special administrative and constitutional structure of the country, i.e. economic, social and political reasons, the government budget and revenues depend heavily on oil exports. The aim of this article is to suggest a theoretical proposal on the optimum level of non-oil exports such that it will clear up the idea of e...

This study aims to select optimal maintenance strategy for components of an electric motor of the National Iranian Oil Refining and Distribution Company. In this regard, a method based on revised multi choice goal programming and analytic hierarchy process (AHP) is presented. Since improving the equipment reliability is an important issue, reliability centered maintenance (RCM) strategies are i...

Random sampling is a powerful tool for gathering information about a group by considering only a small part of it. We discuss some broadly applicable paradigms for using random sampling in combinatorial optimization, and demonstrate the eeectiveness of these paradigms for two optimization problems on matroids: nding an optimum matroid basis and packing disjoint matroid bases. Applications of th...

PID controller is an extremely important type of controller. In this paper the Differential Evolution technique, is successfully applied in system PID tuning and on–line tuning as a novel technique for optimum adaptive control. The details of applying the proposed method are given and the experiments done show that the proposed strategy is effective and robust.

User pairing in Non-Orthogonal Multiple-Access (NOMA) uplink based on channel state information is investigated considering some predefined power allocation schemes. The base station divides the set of users into disjunct pairs and assigns the available resources to these pairs. The combinatorial problem of user pairing to achieve the maximum sum rate is analyzed in the large system limit for v...