nowadays, in order to reach minimum production cost in machining operations, various optimization methods have been proposed. since turning operation has different parameters affecting the workpiece quality, it was selected as a complicated manufacturing method in this paper. to reach sufficient quality, all influencing parameters such as cutting speed, federate, depth of cut and tool rake angl...

AbstractThe different phases of a structure’s life-cycle are managed by teams with little interaction. Correspondingly, the optimization individual is isolated and does not ...

introduction: food industry is one of the most important industries in developing countries that has an enormous role in employment, export and value added of the agricultural sector. iran as a developing country has a comparative advantage in food product industries for several reasons such as adequate and cheap raw materials and having several companies in the field of food industries. the fo...

Abstract Purpose The primary objective of this study was to evaluate the environmental impact and financial cost repairing surgical scissors. Methods We used life cycle assessment (LCA) analysis estimate impacts functional unit one use a reusable scissor (manufactured in Germany UK), three baseline scenarios were compared: no repair, onsite (hospital), offsite (external contract) repair. This ‘...

Recently, immigration and its socio-economic aspects have been in the centre of European Union leaders’ agenda. In this paper, we apply National Transfer Accounts (NTA) methodology to calculate complete set NTA results for immigrants natives five EU countries. We find that due lower labour income, which cannot be offset by consumption, experience a shorter independence period much aggregate lif...

In this paper, a new power, heating and hydrogen cogeneration cycle from Sabalan geothermal two wells is proposed and analyzed. In the proposed system, a new double flash cycle and organic Rankine cycle are used for power production. A proton exchange membrane (PEM) is also used for hydrogen production and the domestic water heater is used for heating. The impacts of some design parameters, suc...

in this research we have presented a local model for implementing systems engineering activities in optimized acquisition of electronic systems in electronic high-tech industrial. in this regard, after reviewing the literature and the use of documents, articles and latin books, we have collected system acquisition life cycle models from different resources. after considering the criteria of the...

The aim of this study is to find the optimal water pressure and percentage of supply vapour in the feed water heaters (fwhs) of steam power plants, such that they maximize the thermal efficiency of the Rankine cycle within pre-specified values of minimum and maximum pressures of the thermodynamic cycle. Thermal efficiency is defined as a function of unknown variables (fluid pressure and vap...

In oil production waterflooding is a popular recovery technology, which involves the injection of water into an oil reservoir. Studies on model-based dynamic optimization of waterflooding strategies have demonstrated that there is a significant potential to increase lifecycle performance, measured in Net Present Value. However, in these studies the complementary desire of oil companies to maxim...