Ventzislav Tzotchev

Ventzislav Tzotchev
University of Chemical Technology and Metallurgy | UCTM · Department of Automation

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6
Publications
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Citations

Publications

Publications (6)
Article
В настоящата работа се разглежда електроннолъчево заваряване на неръждаема стомана тип 1H18NT. Оценени са модели за зависимостите на геометричните характеристики на получените заваръчни шевове при вариране на параметрите на процеса – мощност на електронния лъч, скорост на заваряване (на движение на електронния лъч), разстояние от магнитните лещи до...
Article
Абстракт: Докладът разглежда процесът на електроннолъчево заваряване във вакуум на неръждаема стомана от тип 1H18NT. Обучени са невронни мрежи, които на базата на параметрите на процеса - мощност на електронния лъч, скорост на заваряване и разстоянията от магнитните лещи на електронната пушка до фокуса на електронния лъч и до повърхността на образе...
Conference Paper
Full-text available
This work considers the electron beam lithography process of exposed and developed polymethyl methacrylate (PMMA) resist profiles under production conditions and in presence of errors in process parameter values. Robust engineering approach is applied and models for the mean values and the variances of the resist profile geometric characteristics d...
Article
Full-text available
Experimental investigations of the modification of starch (corn and potato) by grafting of acrylamide using electron beam irradiation in order to synthesize water-soluble copolymers having flocculation abilities is performed. The influence of the variation of the parameters acrylamide/starch weight ratio, electron beam irradiation dose, dose rate a...
Article
Full-text available
Experimental investigation of the modification of starch by grafting acrylamide using electron beam irradiation in order to synthesize water-soluble copolymers having flocculation abilities is performed. The influence of the variation of the parameters acrylamide/starch (AMD/St) weight ratio, electron beam irradiation dose and dose rate, as well as...
Article
Full-text available
An experimental investigation connected with the modification of starch by grafting acrylamide with the application of electron beam irradiation is performed. It is aimed at the synthesis of watersoluble copolymers having flocculation abilities. The acrylamide monomer provides a polar graft side chain which turns it into a hydrophilic copolymer. Th...