Проектирование контактора постоянного тока для коммутации цепи привода экскаватора

РЕФЕРАТ Выпускная квалификационная работа включает в себя 90 страниц, 22 рисунка, 11 таблиц, 119 формул, 24 источника. Объект исследования — контактор постоянного тока. Цель работы заключается в проектировании контактора постоянного тока для коммутации цепи привода экскаватора на заданные параметры тока, напряжения и режима работы. Для достижения этой цели, необходимо решить следующие задачи: •выбор прототипа контактора постоянного тока; •расчет токоведущего контура; •расчет дугогасительного устройства; •расчет механической характеристики; •расчет электромагнитной системы. Результатом проведенной работы является спроектированный контактор постоянного тока.ESSAY Final qualifying work includes 90 pages, 22 figures, 11 tables, 119 formulas, 24 source. The object of study - DC contactor. The aim of the work is to design a DC contactor for switching chain excavator drive on given current parameters, voltage and operating mode. To achieve this goal, you need to solve the following problems: • Selection of a prototype DC contactor; • calculation of the current-carrying path; • calculation Interrupters; • calculation of the mechanical characteristics; • calculation of electromagnetic systems. The result of this work is designed DC contactor

The adaptor molecule CARD9 is essential for tuberculosis control

The cross talk between host and pathogen starts with recognition of bacterial signatures through pattern recognition receptors (PRRs), which mobilize downstream signaling cascades. We investigated the role of the cytosolic adaptor caspase recruitment domain family, member 9 (CARD9) in tuberculosis. This adaptor was critical for full activation of innate immunity by converging signals downstream of multiple PRRs. Card9−/− mice succumbed early after aerosol infection, with higher mycobacterial burden, pyogranulomatous pneumonia, accelerated granulocyte recruitment, and higher abundance of proinflammatory cytokines and granulocyte colony-stimulating factor (G-CSF) in serum and lung. Neutralization of G-CSF and neutrophil depletion significantly prolonged survival, indicating that an exacerbated systemic inflammatory disease triggered lethality of Card9−/− mice. CARD9 deficiency had no apparent effect on T cell responses, but a marked impact on the hematopoietic compartment. Card9−/− granulocytes failed to produce IL-10 after Mycobaterium tuberculosis infection, suggesting that an absent antiinflammatory feedback loop accounted for granulocyte-dominated pathology, uncontrolled bacterial replication, and, ultimately, death of infected Card9−/− mice. Our data provide evidence that deregulated innate responses trigger excessive lung inflammation and demonstrate a pivotal role of CARD9 signaling in autonomous innate host defense against tuberculosis

In situ CO concentrations at the sites Zugspitze (47 deg N, 11 deg E) and Cape Point (34 deg S, 18 deg E) in April and October 1994

Continuous measurements of CO have been performed at the coastal site Cape Point (34 deg S, 18 deg E) and at the continental mountain site Zugspitze (47 deg N, 11 deg E) since 1978 and 1990, respectively. The CO concentrations observed at both stations in 1994 during the periods April 9 - 18, and September 30 to October 10 were studied in detail with the aim to supplement CO observations from space made by NASA during two shuttle flights (measurement of air pollution from satellites (MAPS) project). All CO values reported were adjusted to the NOAA Climate Monitoring and Diagnostics Laboratory (CMDL) calibration scale. CO mixing ratios at Cape Point comprised episodes of baseline CO levels in maritime air (average: 48.8 ppb (April); 69.4 ppb (September/October)) and of elevated levels related to continental air and regional pollution (average: 89.5 ppb (April); 102.1 ppb (September/October)). During the same periods the mean CO mixing ratio at the Zugspitze amounted to 220.1 ppb (range 150 - 358 ppb) and 124.8 ppb (range 78 - 175 ppb), respectively. Due to the prevailing airflow, CO levels at the Zugspitze were unusually high compared to the longterm average during the April mission (time of seasonal maximum). In contrast, they were close to the average during the October mission. Baseline concentrations at Cape Point were about 3 - 4 ppb above the long-term average for both April (increasing side of seasonal cycle) and October (time of seasonal maximum), which is within the range of normal interannual variability. A preliminary comparison with the MAPS data for the respective geographic regions showed good agreement of the CO mixing ratios for clean air at Cape Point in April and at the Zugspitze in October. In addition, the CO levels observed in continental air at Cape Point in October agreed well with the MAPS data. Obvious differences in CO concentrations for other parts of the records mainly reflected uncomparable atmospheric conditions. In particular, they seem ed to be related to either vertical gradients of CO or small-scale differences in air mass composition as indicated by meteorological analyses

Bestimmung der globalen Verteilung gasfoermiger Schadstoffe in der Troposphaere und unteren Stratosphaere Abschlussbericht

SIGLETIB Hannover: FR 3641 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

Bestimmung der globalen Verteilung gasfoermiger Schadstoffe in der Troposphaere und unteren Stratosphaere Abschlussbericht

TIB Hannover: FR 3641+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman