optimization

20190708-01
Modeling multi-layered soil by equivalent uniform and two-layer soil models in grounding applications
Marinko Barukčić, Nenad N. Cvetković, Željko Hederić, Toni Varga

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The soil models are crucial for calculating the performances of the grounding systems in electrical engineering. Usually, some approximations and simplified calculation procedures are used in engineering practice. These procedures ...  read more

20190506-03
Double-stator switched reluctance generator
Ashkan Karimi Koohpar, Jawad Faiz

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Double-stator switched reluctance generator (DSSRG) is a switched reluctance machine consisting of two stators and one rotor, it is potentially compact, low cost, efficient, high output power and power density. This paper ...  read more

20140506-13
Model-Based Quality Optimization of EBW of steel
Elena Koleva, Dmitriy Trushnikov, Vladimir Belenkiy, Georgi Mladenov, Stefan Angelov, Dimitar Todorov

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Experimental results (four series of experiments) for EBW of two types of steel – high strength steel of 38Cr2Ni2Mo type and stainless steel are obtained and used for the estimation of models, describing the dependencies ...  read more

20180708-09
Optimum conditions for sterilization of Geobacillus stearothermophilus spores using plasma-based ion implantation
Motoko Hiyama, Koji Kakugawa, Aya Yakushiji, Kenichi Watanabe, Ryota Matsuda, Yoshinobu Tsuchiya, Takeshi Tanaka

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In recent years, substantial research into low-temperature sterilization techniques has been conducted. Plasma-based ion implantation (PBII) is a low-temperature, cost-effective technique for sterilizing medical equipment, ...  read more

20150506-02
Optimally designed energy efficient transformer using global iterative algorithms
Mihail Digalovski, Goran Rafajlovski, Krste Najdenkoski

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The reduction of total losses for transformers is of great importance both from economic and environmental aspects. In the paper two optimization techniques, Global Search and Pattern Search, to minimize the total power losses ...  read more

20151112-08
Study of power fluctuations and their compensation in a hybrid system with renewable energy sources
Hristiyan Kanchev, Bruno François, Zahari Zarkov, Ludmil Stoyanov, Vladimir Lazarov

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This paper deals with the combined influence of photovoltaic and different wind energy potentials and respectively the produced energy on the operation of an autonomous hybrid system. The studied system comprises a PV generator, ...  read more

20170304-04
Model-based optimization of electron beam welding for obtaining defect-free welds
Elena Koleva, Lilyana Koleva, Georgi Mladenov

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The optimization of welds obtained by electron beam welding is a multi-criterial task, involving the requirements for the geometrical characteristics of the welds, together with the fulfilment of the requirements for lack ...  read more