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881.
特殊人工环境对武器装备的危害 总被引:2,自引:2,他引:0
给出了在战争条件下特殊人工环境的定义,并举例说明了人工环境在古今战役中的应用,具体阐述了烟尘环境、核环境、电磁辐射环境和生化有毒沾染环境等4种特殊人工环境对武器装备各方面的危害,最后指出了在现代高技术战争中研究特殊人工环境对武器装备危害的重要性和必要性. 相似文献
882.
883.
Tohno S Ma CJ Hayakawa S Yamasaki S Kasahara M 《Environmental monitoring and assessment》2006,120(1-3):575-584
The X-ray microprobe system was applied to ultra trace characterization of single Kosa aerosols and non-Kosa aerosols simultaneously collected at Yasaka, Japan and TaeAnn, Korea. We demonstrated remarkable mass increase of heavy metals as well as soil components in individual particles during the Kosa event compared with the non-Kosa period at Yasaka. Backward trajectory analysis suggested that the Kosa samples were in the mixing state of mineral components and anthropogenic heavy elements. Double thin film method was applied to investigate the seasonal change of the mixing states of single sea-salt aerosols associated with chlorine loss due to the heterogeneous reactions between sea-salt particles and acidic gases. It was revealed that the percentages of both chloride-nitrate mixed particles and sulfate-nitrate ones were larger in wintertime than those in summertime and fraction of chloride-nitrate mixed particles increased with an increase of particle size. Comparison between the size-segregated bulk analysis and the single particle analysis demonstrated that remarkable chloride depletion occurred in coarse particles sampled on May in the former analysis, while chloride depletion in coarse particles was not marked in the latter analysis. The discrepancy attributes to the difference of the sampling time between both analyses because significant change of air mass route occurred during the bulk sampling after completion of the single particle sampling. 相似文献
884.
885.
煤岩变形破裂的电磁辐射规律及其应用研究 总被引:22,自引:3,他引:19
对受载煤体变形破裂电磁辐射规律进行了研究及分析 ,并对煤岩电磁辐射技术应用于预测预报煤与瓦斯突出进行了试验研究。研究结果表明 ,电磁辐射与煤岩体的载荷、加载速率及变形破裂过程呈正相关。煤岩电磁辐射技术在预测预报煤与瓦斯突出等方面有着非常广阔的应用前景。 相似文献
886.
887.
Meri Suhartini H. Mitomo F. Yoshii N. Nagasawa T. Kume 《Journal of Polymers and the Environment》2001,9(4):163-171
Three kinds of poly(butylene succinate)s (PBS) with different molecular weight were irradiated with electron beams in the presence of inorganic material. Fourteen kinds of inorganic materials were used in this work. The presence of inorganic material inside cross-linked PBS samples enhances the yield of gel formation. The heat stabilities of PBS samples were checked; it was found that silicon dioxide and carbon black significantly improve these properties. Enzymatic and soil burial tests were performed; the presence of these inorganic materials in cross-linked PBS accelerates the rate of biodegradation. 相似文献
888.
环境辐射有关问题的讨论 总被引:1,自引:1,他引:0
本文论述了与环境辐射有关的问题。根据其剂量当量和危险水平,讨论了公众剂量限值的实践性 相似文献
889.
Six air issues are currently on science and policy agendas in Canadaand elsewhere. These are climate change, stratospheric ozone depletion(increased UV-B radiation), acidic deposition, SMOG (increasedground-level ozone), suspended particulate matter, and hazardous airpollutants. Atmospheric scientists and decision makers have largelyaddressed these issues individually resulting in single-issue policies. However, it is now recognized that these issues are inter-related, andthey may interact to cause negative as well as some beneficial effects,not only on the state of the atmosphere but also on societal andecological systems. This paper illustrates through several examples theatmospheric dysfunction caused by the linkages among the six airissues. It also points to potentially conflicting policies arising from thesingle-issue approach, and it emphasizes the need for better integrationof air issues. The linkages are summarized qualitatively in Table I. 相似文献
890.
The Kyrghyz Republic, located in the southeastern region ofthe former Soviet Union, maintains a population of more thanone-half-million persons and is heavily dependent on LakeIssyk-Kyol, both to draw tourists to the area and for itsutilization by some as a food and recreation source. Historical surveys, conducted primarily for geologicalexploration, have indicated that localized areas ofshoreline on Lake Issyk-Kyol have relative radiation levelsin excess of ambient background by as much as a factor often. Uranium mining operations in the mountains borderingthe lake to the south may have resulted in the contaminationof a number of areas on the lake's southern shore. Concentrations of naturally occurring uranium, thorium, andpotassium are present in these soils in elevated quantities. This paper presents the results of an investigation of soilconcentrations along the shoreline of Lake Issyk-Kyolrelative to previously discovered areas of high exposurerate. 相似文献