Novel Thione-Thiol Rearrangement of Dithiocarbonic Acid O-(2,2,6,6-Tetramethylpiperidin-1-yl) Ester in the Context of Controlled Radical Polymerization

Addition of the lithium salt of N-hydroxy-2,2,6,6-tetramethylpiperidine 10 to carbon disulfide and subsequent methylation affords the rearranged dithiocarbonic acid S-methyl-S'-(2,2,6,6-tetramethylpiperidin-1-yl)-ester 9 rather than the expected xanthate ester S-methyl-O'-(2,2,6,6-tetramethylpiperidin-1-yl)-ester 8. n-Butylacrylate could be polymerized with the novel compound 9 even though the polymerization was not controlled

Повышение ресурсоэффективности процесса приготовления высокооктановых бензинов методом математического моделирования

В работе рассмотрен способ повышения ресурсоэффективности процесса производства высокооктановых бензинов разработкой и применением прогностической математической модели изомеризации прямогонных бензиновых фракций. Проведена оценка внедрения технологии каталитической изомеризации С7 фракции в структуры действующих нефтеперерабатывающих предприятий.The method of increasing the resource efficiency of the process of production of high-octane gasoline by developing and using the predictive mathematical model of isomerization of straight-flow gasoline fractions is considered. The estimation of the introduction of the technology of catalytic isomerization of the C7 fraction into the structures of existing refineries is carried out

Study of phase control for synchronous transient stability

Background: During operation of power systems there is the problem of synchronic transient stability of generators for nearby and prolonged faults. Possible control actions to ensure dynamic stability are the following: electric braking, emergency regulation of turbine, partial generation-shedding. However these control actions cannot be applied in all cases. Therefore, in this paper we consider another possible kind of the control actions - the phase control. To apply phase control for the transient processes it is necessary to solve the tasks: dosage of impacts by value of the phase shift and the time of control activation/ removal. Materials and methods: In the study we used the materials describing the technical means for the implementation of phase control and the publications of other authors. The impacts dosage in the form of phase control is modelled on the basis Mathcad and Mustang software package. Results: It is shown that for the successful phase control which maintains synchronic transient stability a certain range of the phase shift and the time for activation and removal of the control action are required. Conclusions: The phase control can be an effective tool for maintaining synchronic transient stability in some specific conditions. Further research of phase control should be directed to the development of its applications using specific hardware

Детальные геофизические работы с целью поисков меди и железа в провинции Юньнань (Китайская народная республика)

Реферат Выпускная квалификационная работа 106 с., 31 рис., 17 табл., 41 источников, прил. нет Ключевые слова: Китай, провинция Юньнань, железные руды, медные руды, электроразведка, магниторазведка, методика работ, интерпретация результатов. Объектом исследования является: перспективный участок «Е», расположенный в пределах провинции Юньнань в Китайской народной республике. Цель работы – поиски железных и медных руд и оценка перспектив участка Пипин на железные и медные руды. В процессе исследования проводились: выбор участка обоснования, анализ геолого-геофизической изученности района, изучение его геологического строения, анализ результатов ранее проведённых геофизических исследований на участке обоснования Маньхамбо и проектном участке Пипин . В результате исследования: выполнен проеAbstract Final qualifying work: 106 c, 31 rice, 17 Table, 41 sources, no adj. Keywords : China, Yunnan Province, iron ore, copper ore, electromagnetics, magnetic, methods of work, the interpretation of results. The object of the research is: promising area "E", located within the Yunnan Province in the People's Republic of China. The purpose of the work - the search for iron and copper ores and evaluation Pepin area prospects for iron and copper ores. The study was conducted with the choice of study area, analysis of geological and geophysical knowledge of the area, the study of its geological structure, the analysis of the results of previously conducted geophysical research in the area Manhambo study and project site Pepin. As a result of the study: the project is executed to carr