Most cutting plane methods, like that of Kelley and Cheney and Goldstein solve a linear approximation (localization) of the problem, and then generate an additional cut to remove the linear program's optimal point. Other methods, like the \central cutting" plane methods, calculate a center of the linear approximation and then adjust the level of the objective, or separate the current center fro...

‌‌‌Fatigue behavior of a vanadium microalloy steel has been studied in this research. Here, microstructure constituents were considered which essentially are dependent on the heat treatment conditions. The results of high cycle fatigue tests revealed that heat treatment procedure and cooling rates have significant effects on fatigue properties. Optimal heat treatment cycle of the microalloyed s...

The present paper deals with local and global conditions for collision-free 3-axis milling of sculptured surfaces and the selection of cutting-tools for a given surface. We describe local and global millability results whose proofs have been published in a previous paper. The theoretical background involves general oo-set surfaces. Here an algorithm is presented which after evaluation of the su...

The purpose of this paper is multi-objective optimization of refrigeration cycle by optimization of all components of the cycle contains heat exchangers, air condenser, evaporator and super-heater. Studied refrigeration cycle is compression refrigeration cycle of unit 132 Third refineries in south pars that provide chilled water for cooling refinery equipment's. Cycle will be performed by t...

– The objective of this paper is to present a decision-based function to determine the optimal maintenance scheduling strategy of thermal power units taking into account the particular obligations of Generation Company, such as bilateral contracts. Opportunities for energy selling at the electricity market as well as a detailed modeling of the power plants are considered in the optimization pro...

The stylized model presented is an optimal control model of technology investment decision of a single product firm. The firm’s technology investment does not have only a long-run positive effect but also a short-run adverse effect on its sales volume. We examine the case of high adverse investment effects where the firm finally leaves the market but we have observed different life cycles till ...

This paper describes an application of fuzzy-logic and evolutionary computation to the optimization of the start-up phase of a combined cycle power plant. We modelled process experts’ knowledge with fuzzy sets over the process variables in order to get the needed cost function for the Genetic Algorithm (GA) we used to obtain the optimal regulations. Due to the obvious impossibility to test the ...

Background and aim: Although nuchal cord is a common occurrence at birth, there is little attention to its importance or management at birth, and teaching includes premature clamping and cutting of the cord as the common option.  Although grade 1 evidence is lacking, the optimal management of the nuchal cord,  the Somersault manoeuvre  is not taught or included in any current guidelines. What e...

Cutting parameters play an essential role in the economics of machining. In this paper, particle swarm optimization (PSO), a novel optimization algorithm for cutting parameters optimization (CPO), was discussed comprehensively. First, the fundamental principle of PSO was introduced; then, the algorithm for PSO application in cutting parameters optimization was developed; thirdly, cutting experi...

A noise effect arising in the rock cutting process is gaining a large attention as to the identification and optimization of the cutting process. The sense experience acquired during the experiments in the process of rotary rock drilling related to the determination of rock type or to the optimal drilling regime determination is formed due to sense perception, mainly hearing, and its further ev...