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中国地震学会科普工作委员会 《国际地震动态》2008,(7)
今年的科技周活动, 中国地震学会原计划以本届全国科技活动周主题"携手建设创新型国家"为主要内容展开, 为保证奥运的顺利召开, 开展公共安全方面的科普宣传活动, 但由于"5·12"汶川发生8级特大地震, 地震学会把科普宣传重点放在了"抗震救灾, 全力支援四川灾区"等方面. 相似文献
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为贯彻落实全国科技大会精神和中国地震局“3 1”体系发展思路,进一步推动科技创新,山西省地震学会从2007年5月份起制定了月报告会制度。在全局的科技人员中开展学术交流活动,并邀请国内外著名地震学专家来我局进行讲座,帮助我局科技人员拓宽科研思路,增长见识,提升科技人员的科研能力。2007年共举办学术报告会8次,参加各类学术活动总人数200余人。学会邀请北京大学陈永顺教授、中国地震局陈鑫连教授和日本国家地震科学和防灾研究院郝宪生博士来我局分别作了“藏南台阵和西藏高原南部大地构造”、“项目表述”和“日本地震动态”的学术报告… 相似文献
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2007年1月31日,新疆地震局举办了2007年学术讲座年的第1期“学术互动讲座”。此次活动是新疆地震局“十一五”人才队伍建设规划具体实施的第一步,活动将以每月1课的形式展开,采取问与答、主讲专家专题讲座、自发交流讲座、外请专家讲座、媒体资料讲座等方法,以地震学、地质学、 相似文献
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《1966—1976年中国九大地震》于1982年5月由地震出版社出版,是为“国际大陆地震活动与地震预报学术讨论会”(1982年9月于北京召开)准备的一本专著。在中国出版工作者协会举办的1982年全国优秀科技图书评奖活动中获得一等奖,受到了专家和广大读者的好评。1966—1976年中国大陆华北和川滇地区发生了九次(邢台、渤海、通海、炉霍、永善、海城、龙陵、唐山、松潘)7级以上的大地 相似文献
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中国地震局 2 0 0 1年度科技外事工作会议于 2 0 0 1年 5月 1 0～ 1 1日在北京召开 ,来自全国各省、自治区、直辖市地震局 ,中国地震局直属单位和机关有关司室的 1 1 1名代表参加了会议。陈章立局长、刘玉辰副局长出席会议并作重要讲话 ,科技发展 (国际合作 )司朱世龙司长作了总结报告。会议全面总结了“九五”期间我局的科技外事工作 ,并对“十五”期间的对外地震科技交流与合作的发展战略进行了研讨。同时 ,代表们还就如何贯彻落实全国科技外事工作会议精神 ,加强外事工作组织与管理 ,提高地震科技国际合作的效益 ,加强中青年国际型科技人… 相似文献
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《CT理论与应用研究》2014,(2):274-274,284
“2014年全国射线数字成像与cT新技术研讨会”拟定于2014年5月在厦门举行。原定会议日期因故向后推迟1周。会议主题是“发掘技术,坚持走理论与应用相结合之路;广泛交流,推动数字成像与CT技术向前发展”。欢迎中国体视学学会会员和广大科技工作者撰写论文,参加学术交流。 相似文献
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In this paper, the changes in sediment transport over 51 years from 1955 to 2006 in the Kuye River in the Loess Plateau in China are assessed. Key factors affecting sediment yield and sediment transport, such as precipitation depth, discharge, and human activities are studied. To investigate the changes in sediment yield in this watershed, a trend analysis on sediment concentration, precipitation depth, and discharge is conducted. Precipitation depths at 2 Climate Stations （CSs）, as well as discharge and sediment transport at 3 Gauging Stations （GSs） are used to assess the features of sediment transport in the Kuye River. The rtmoff modulus （defined as the annual average discharge per unit area, L/（s·km^2）） and the sediment transport modulus （defined as the annual suspended sediment transport per unit area, t/（yr km^2）） are introduced in this study to assess the changes in runoff and sediment yield for this watershed. The results show that the highest average monthly discharge during the study period in the Kuye River is 66.23 m^3/s in August with an average monthly sediment concentration of 88.9 kg/m^3. However, the highest average monthly sediment concentration during the study period in the Kuye River is 125.34 kg/m^3 and occurs in July, which has an average discharge of 42.6 m^3/s that is much less than the average monthly discharge in August. It is found that both the runoff modulus and sediment transport modulus at Wenjiachuan GS on the Kuye River has a clear downward trend. During the summer season from July to August, the sediment transport modulus at Wenjiachuan GS is much higher than those at Toudaoguai and Longmen GSs on the Yellow River. The easily erodible loess in the Kuye River watershed and the sparse vegetation are responsible for the extremely high sediment yield from the Kuye River watershed. The analyses of the grain size distribution of suspended load in the Kuye River are presented. The average monthly median grain size of suspended load in the Kuye River is largest in February and then decreases until June. In July, the average monthly median grain size of suspended load approaches another peak and decreases until September. Then, the median grain size of suspended load starts to increase until February of the following year. However, the average monthly median grain size of suspended load in the Yellow River at Toudaoguai and Longmen GSs is the smallest between early summer and late fall The median grain size in the Yellow River starts to increase in November and approaches the largest size in January. 相似文献
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3He/4He ratios up to 3.5 times the ratio of atmospheric He were found in groundwater samples. The3He enrichment can be attributed to radiogenic3He produced by in-situ beta-decay of3H. This shows that tritiogenic3He is accumulating in confined waters. From tritiogenic3He and3H concentrations, ages of groundwaters can be calculated. Detection of tritiogenic3He gives a tool to trace a tritium contamination which occurred in the past and cannot be assessed only by the3H counting method. 相似文献
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Observations of trace gases (SO2, NH3, NO2 and O3) were made during the period 1981 to 1984 at 6 different locations representative of urban industrial, urban, nonurban, thermal power plant and marine environment. Diurnal variations of the trace gases were studied in an urban environment. Except in the urban industrial environment, the concentration of NH3 was found in the range of background values. Also, the average concentrations of NO2 and O3 at the different environments were in the order of background values. However, the concentrations of SO2 were substantially higher by about 7 times, in urban industrial and thermal power plant environments. The diurnal variations of SO2, NH3 and NO2 showed anitphase relationship with surface temperature at the urban environment station which is relatively free of industrial pollution. Discussion is centred on trace gas variations in different environments in India together with the values reported for various countries in the world. 相似文献
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The aim of this study is to estimate likely changes in flood indices under a future climate and to assess the uncertainty in these estimates for selected catchments in Poland. Precipitation and temperature time series from climate simulations from the EURO-CORDEX initiative for the periods 1971–2000, 2021–2050 and 2071–2100 following the RCP4.5 and RCP8.5 emission scenarios have been used to produce hydrological simulations based on the HBV hydrological model. As the climate model outputs for Poland are highly biased, post processing in the form of bias correction was first performed so that the climate time series could be applied in hydrological simulations at a catchment-scale. The results indicate that bias correction significantly improves flow simulations and estimated flood indices based on comparisons with simulations from observed climate data for the control period. The estimated changes in the mean annual flood and in flood quantiles under a future climate indicate a large spread in the estimates both within and between the catchments. An ANOVA analysis was used to assess the relative contributions of the 2 emission scenarios, the 7 climate models and the 4 bias correction methods to the total spread in the projected changes in extreme river flow indices for each catchment. The analysis indicates that the differences between climate models generally make the largest contribution to the spread in the ensemble of the three factors considered. The results for bias corrected data show small differences between the four bias correction methods considered, and, in contrast with the results for uncorrected simulations, project increases in flood indices for most catchments under a future climate. 相似文献
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Cu concentrations in surface (river and lake) and subsurface waters are determined. The geographic pattern of Cu distribution in natural water is identified. This pattern is controlled by the difference between its concentrations in drained rocks and soils and the geochemical redox conditions of its migration. Territories with low, medium, and elevated Cu concentrations in natural waters are identified. The concentrations of Cu in natural waters of the region are found to be generally lower than the Clarke values. 相似文献
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Changes in thermal extremes of the climate of Poland in 1951–2010 are examined. Warm extremes have become more frequent, while cold extremes have become less frequent. In the warming climate of Poland, the increase in the number of extremely warm days in a year and the decrease in the number of extremely cold days in a year have been observed. Also the increase of the maximum number of consecutive hot days in a year and the decrease of the maximum number of consecutive very cold and extremely cold days in a year have been observed. However, the trends are not of ubiquitous statistic significance, as the natural variability is strong. 相似文献
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M. MONIRUL QADER MIRZA 《水文科学杂志》2013,58(5):613-631
Abstract The basin area of the Ganges River in Bangladesh is extremely dependent on a regular water supply from upstream to meet requirements for agriculture, fisheries, navigation, salinity control, and domestic and industrial sectors. In 1975, India commissioned a barrage on the Ganges River at Farakka to divert a significant portion of the dry season flow in order to make the Calcutta Port navigable. Statistical analyses of discharge and water level data have been carried out to determine if significant changes have occurred in the hydrology of the Ganges system in Bangladesh in the post-Farakka period. Siltation of the Gorai River (an offtake of the Ganges River) has also been examined using the stage-discharge relationship and regression analysis. The analyses show that the diversion has caused considerable hydrological changes in the Ganges system in Bangladesh. The water supply in the dry season has been reduced substantially, while siltation of the Gorai River has increased significantly. 相似文献
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