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报道了1982年9月8日至14日在北京召开的“大陆地震活动性和地震预报国际学术讨论会”的简况。参加此次讨论会的有来自23个国家和地区的100多名代表,提交大会讨论的学术论文共73篇,其中包括中国的28篇。此次讨论会充分地反映了近年来大陆地震活动和地震预报的研究正在逐步深入并取得可喜进展的情况。 相似文献
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“大陆地震活动和地震预报国际学术讨论会”将于今年9月8日至14日在北京召开。这次会议是1979年4 月在巴黎国际地震讨论会的专家会议上提出的,后又得到了联合国教科文组织、联合国救灾署、国际地震与地球内部物理协会、联合国环境署等国际组织的支持和赞助。联合国教科文组织和中国地震学会共同 相似文献
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在1982年9月8日至9月14日在中国北京召开的“大陆地震活动与地震预报国际学术讨论会”上,来自23个国家和地区的地震研究人员宣读了许多很有价值的学术论文,反映了近年来世界各国在大陆地震活动和地震预报研究领域中取得的科研成果。这里将其中的两个专题讨论综述如下: 相似文献
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1.第12届国际环境生物地球化学讨论会(ⅫInternationalSymposiumonEnvironmentalBiogeochemistry)日期:1995年9月3-8日地点:巴西里约热内卢联系人及地址:R.Oremland,USGS,345MiddlefieldRd,MemoPark,CA94025;fax415-329-4463;roremlan@rcamnl.wr.usgs.gov·本届讨论会的主题是:生物圈和大气的变化。2.国际水库诱发地震活动讨论会(InternationalSymposiumonReservoir-InducedSeismicity)日期:1995年11月1-5日地点:中国北京主办单位:中国水电工程学会;中国大坝委员会等联系人及地址:H.Chen,Instit… 相似文献
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山西大同数字遥测地震台网记录的震相特征 总被引:1,自引:0,他引:1
从地球及地壳的分层结构出发,使用较成熟的理论,从地震波传播的基本原理入手,结合多年的震相观察分析工作实践,选取了山西大同数字遥测地震台网近年来的一些典型震相进行了分析,得出本台网记录到震中距小于100km的地方震震相有Pg,P11,Sg,S11震中距在100km~500km的近震震相有Pn,Pg,P11,Sn,Sg,S11对比分析了在本台网内及周边地区发生的爆破与天然地震在震相上的差异性,并对其特征作了较详细的描述。 相似文献
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Mostafa Baniasadi Mohammad Reza Zare' Mehrjordi Hossein Mehrabi Boshrabadi Hamid Reza Mirzaei Khalilabad Abbas Rezaei Estakhrooye 《Ground water》2020,58(4):560-570
In recent decades, increased extraction of groundwater for human and agriculture consumption has led to a substantial drop in groundwater level in large areas of across the world. Declining groundwater levels is a serious problem in itself and has multiple economic, social, cultural, political, security-related, and environmental externalities. The negative economic-environmental externalities of overextraction of groundwater in the Orzouiyeh plain in the Kerman Province, Iran, were evaluated using methods such as replacement cost, production function, market prices, shadow price, and the value of the input marginal product. After evaluating externalities, the Positive Mathematical Programming method was used to evaluate different water policies to reduce the consumption of groundwater. The total economic losses due to the externalities were calculated to equal 2.8 U.S. million dollars. The damages caused by environmental externalities were calculated to equal 436.1 U.S. million dollars. The results related to the positive planning model show that the best policy among different options, such as deficit irrigation policy or combined policies, involves implementation of pressurized irrigation systems. 相似文献
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At present the development together with an intensification of anaerobic processes calls for methods of observation and control. It is very important to know intermediate metabolites of anaerobic microorganisms and the activity of methanogenic ones. Presented analytical methods are GLC analyses of lower fatty acids, alcohols, aldehydes and ketones and components of biogas. The chromatography using steam as a mobile phase is also mentioned. The method of determining the fluorescent coenzyme F420 was tested and modified. This coenzyme is specific for methanogenic microorganisms and is closely linked with their activity. The determination of the total activity of the hydrogenase system of anaerobic microorganisms by means of the rate of the consumption and evolution of molecular hydrogen was also presented. The applicability and effectivenes of these methods were verified on natural samples. All the methods mentioned above give satisfactory results with available equipment, materials and techniques. 相似文献
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叙述了在FreeBSD环境下构建基于PPTP的VPN网关的过程和技术,分析了基本概念、实现方式以及在江西省地震信息网的实际应用等。 相似文献
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对兰州地震研究所的三段历史作回顾,分别为国家地震局、中国地震局兰州地震研究所的体制沿革变迁,中国科学院地球物理研究所;中国科学院兰州地球物理研究所观象台早期创建;兰州地震研究所硕士点早期阶段。 相似文献
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Several alternative probability distributions for estimating the probability of exceedance of contaminant concentrations are examined for their appropriateness for developing inputs to risk assessments. The rationale is provided for using the log Pearson Type III distribution, a three-parameter model, for estimation of the exceedance probabilities. 相似文献