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Statistic Analysis of Oxygen Supplying Status in Qinghai-Tibet Railway Car

Though oxygen supplying system has been developed and loaded in Qinghai-Tibet railway car, there has been no authoritative method and results for evaluation of the effect of oxygen supplying system. It's necessary to carry out investigation about the oxygen supplying status in the passenger train. Based on the measurement and investigation data, this paper concretely analyzed the oxygen supplying status. For the problem discovered through the measurement and analysis, this paper have construed the causation and provided suggestions to improve the oxygen supplying system. Qinghai-Tibet railway is the highest and longest downy railway in the world, and anoxia has been one of the three hang-up problems during the construction of Qinghai-Tibet railway. Though the oxygen supplying system has been developed and loaded, there has been no authoritative method and results for evaluation of the effect of oxygen supplying system. It's necessary to carry out investigation about the oxygen supplying status in the passenger train. Based on one year's measurement and investigation carried out by investigating team for oxygen supplying status of passenger train in Qinghai-Tibet Plateau, we have got a lot of practical measurement data, and concretely analyzed oxygen supplying status in passenger train of Qinghai-Tibet railway by theories of statistics. There are two kinds of investigation, which are subjective investigation and objective investigation. Subjective investigation was carried out in the mode of questionnaire, while objective investigation in the mode of practical measurement following with the train. To get the real feeling of different passengers, we designed the questionnaire according to the main parameters of oxygen supplying system and characters of the crowd. Then through statistic analysis, we know whether the oxygen supplying system satisfies the passengers. Meanwhile, through real-time measurement in different position of different carriages, we can get the space- time concentration distribution of oxygen, and know if the oxygen supplying system reaches to the design request.