Разработка технологии и проектирование участка сборки-сварки траверсы задней механизированной крепи МКЮ4У.56

Актуальность работы: в данной выпускной квалификационной работе производится проектирование участка сборки-сварки траверсы задней крепи механизированной МКЮ 4У.56. Объектом исследования является процесс изготовления траверсы. В результате данной работы следует получить производство с наибольшей степенью механизации и автоматизации повышающей производительность труда.Relevance of the work: in the final qualifying work is done tooling design and site assembly welding traverses back lining mechanized MKY 4U.56 As a result of this work should be obtained from producing the greatest degree of mechanization and automation increases productivity

Subcycle Dynamics of Laser-induced Ionization and Tailored Laser Filaments

Powerful laser pulses with duration of few optical cycles and less open up new venues of nonlinear optics and yield novel applications for quantum optics, electronics and solid-state physics. In the present Ph.D. research we study, by means of supercomputer simulations, new approaches to powerful ultrashort pulse self-transformation in laser-induced filaments and filament-like regimes. We have found new regimes in which unprecedentedly short powerful light pulses in optical domain can be generated in helium via shock wave formation at the optimum pulse compression point. We have found general scaling laws that extend nonlinear pulse self-transformation regimes to arbitrarily high powers. We also study photoionization dynamics in solids at ultrashort timescales and develop a simple closed-form quantum-mechanical model of ultrafast photoionization and optical properties of photoionized solids, applicable for pulses of arbitrary shape and duration, in a wide range of field intensities, and in a wide range frequencies of field and of nonlinear response. Our model provides single self-consistent framework for nonlinear optics of absorbing semiconductors and transparent dielectrics in high intensity fields. Using our ultrafast photoionization framework we refine criteria of ultrafast light-induced damage in the transparent material. Our simulations of ultrashort pulse propagation through photoionized solid using finite-difference time domain code predict complex charge field dynamics in the bulk of the solid, not described by semiclassical model of optical properties of solid-state plasma. We found non-monotonous dependence of solid-state plasma density in the wake of the pulse on depth inside the solid due to high-harmonic generation, phase matching and absorption. Physical effects captured by our model show potential of ultrafast photoionization for future solid-state optoelectronics and information processing as it allows precise control of charge dynamics inside solids at time scales 6 orders of magnitude faster than currently available semiconductor electronics

Potentials of Wide-Bore Fused Silica Capillary Columns for Substance Identification by Means of Retention Indices

A wide-bore capillary column with a methylsilicone stationary phase has been evaluated with regard to its ability to identify substances by means of their retention indices. Column efficiency was compared with a normal packed column and a medium-bore capillary column, and the impact of carrier gas flow and load capacity were investigated. It was shown that under defined conditions retention indices on the wide-bore capillary column were comparable to those available in a data bank obtained on packed column