A series of experiments were conducted for Al-1.65%Si (mass fraction) alloy melt to study the formation of grain refining structure with ultrasonic stirring. The cooling curves of ingots with ultrasonic were measured ...A series of experiments were conducted for Al-1.65%Si (mass fraction) alloy melt to study the formation of grain refining structure with ultrasonic stirring. The cooling curves of ingots with ultrasonic were measured and compared with those without ultrasonic. At the same time, the effect of the time of ultrasonic stirring on solidification structure of ingots was investigated. The influence of ultrasonic on the grain-refining efficiency of ingots was analyzed. In order to well understand the melts behavior under ultrasonic, by using ammonium chloride solution, the simulation experiment was carried out and the temperature distribution in ingot with or without ultrasonic was compared. The results indicate that the ultrasonic reduces the temperature inhomogeneity of melt, i.e. the ultrasonic helps to homogenize the melt temperature. The effect of stirring and heat generation in ingot start to occur with increasing the time of ultrasonic stirring.展开更多
目的分析肺结核初治患者化疗期间发生肝损害的相关因素。方法采用历史性列队研究,回顾性分析2010年3月-2014年12月初治肺结核病历资料592例,采用单因素χ2检验(P<0.05)和非条件Logistic回归模型对抗结核药物所致肝损害的相关因素进...目的分析肺结核初治患者化疗期间发生肝损害的相关因素。方法采用历史性列队研究,回顾性分析2010年3月-2014年12月初治肺结核病历资料592例,采用单因素χ2检验(P<0.05)和非条件Logistic回归模型对抗结核药物所致肝损害的相关因素进行分析。结果肺结核患者化疗引起肝损害的危险因素为性别(OR=0.166 CI 0.062-0.442)、年龄(OR=2.209 CI 1.468-3.326)、饮酒史(OR=2.165CI1.338-3.503)、营养状况(OR=2.555 CI 1.399-4.665)、HBV感染者(OR=3.13 CI 1.61-6.085)、未使用护肝药物((OR=6.349 CI 3.562-11.319)、未使用免疫药物(OR=3.614 CI 1.986-6.576)结论男性、高龄、营养不良、嗜酒、HBV感染、未使用护肝和免疫药物,是抗结核药物性肝损害的危险因素。展开更多
基金Project(2005L186) supported by Educational Department of Liaoning Province, China
文摘A series of experiments were conducted for Al-1.65%Si (mass fraction) alloy melt to study the formation of grain refining structure with ultrasonic stirring. The cooling curves of ingots with ultrasonic were measured and compared with those without ultrasonic. At the same time, the effect of the time of ultrasonic stirring on solidification structure of ingots was investigated. The influence of ultrasonic on the grain-refining efficiency of ingots was analyzed. In order to well understand the melts behavior under ultrasonic, by using ammonium chloride solution, the simulation experiment was carried out and the temperature distribution in ingot with or without ultrasonic was compared. The results indicate that the ultrasonic reduces the temperature inhomogeneity of melt, i.e. the ultrasonic helps to homogenize the melt temperature. The effect of stirring and heat generation in ingot start to occur with increasing the time of ultrasonic stirring.
文摘目的分析肺结核初治患者化疗期间发生肝损害的相关因素。方法采用历史性列队研究,回顾性分析2010年3月-2014年12月初治肺结核病历资料592例,采用单因素χ2检验(P<0.05)和非条件Logistic回归模型对抗结核药物所致肝损害的相关因素进行分析。结果肺结核患者化疗引起肝损害的危险因素为性别(OR=0.166 CI 0.062-0.442)、年龄(OR=2.209 CI 1.468-3.326)、饮酒史(OR=2.165CI1.338-3.503)、营养状况(OR=2.555 CI 1.399-4.665)、HBV感染者(OR=3.13 CI 1.61-6.085)、未使用护肝药物((OR=6.349 CI 3.562-11.319)、未使用免疫药物(OR=3.614 CI 1.986-6.576)结论男性、高龄、营养不良、嗜酒、HBV感染、未使用护肝和免疫药物,是抗结核药物性肝损害的危险因素。
