中国食管癌与土壤环境中元素的相关性

利用土壤元素资料 2 0 6 94 4 8个数据 ,食管癌死亡调查资料 1750 80例 ,研究了食管癌死亡率与人群生存的土壤环境中元素的相关性。结果表明 ,铅、硒、铷、铯、镁、钙、镓、铊、钍、铀、锡、铪、铋、钼、溴、碘元素与食管癌死亡率有相关性

THE CORRELATION BETWEEN THE CANCER OF THE ESOPHAGUS IN CHINA AND THE ELEMENTS IN THE EDATOPE

By the use of the elementary information in the soil with 2069448 data and the investigation materials with 175080 cases of illness about the death caused by the cancer of the esophagus, the authors have studied the correlation between the mortality of cancer of the esophagus and the 64 various elements in the edatope which the existence of mankind was dependent on. The studied results have indicated that the mortality of cancer of the esophagus was obviously correlative to Pb, Se, Rb, Cs, Mg,Ca,Ga,Tl,Th,U,Sn,Hf,Bi,Mo,Br and I elements, and their correlation coefficients of gradation were separately given. Key words: China; cancer of the esophagus; mortality; edatope; element; correlation; correlation coefficient of gradationg Research Institute, Harbin Institute of Technology, Harbin 150001) WT5HZ]Abstract A vibration isolation system was proposed, that uses air springs as passive vibration isolation elements and electromagnetic actuators controlled by neural networks as active vibration isolation elements, analyze the vibration transmissibility basing on using relative displacement, velocity, acceleration and absolute displacement, velocity, acceleration as feedback variables. It is proved that vibration isolation system combining active with passive vibration isolation is effective on ultra precision machine tool.