By means of differentiation of remote sensing image, field seismo-geological survey, analysis on drilling explora- tion materials, sampling and dating of rock samples, combined with seismicity and microscopic tectoni...By means of differentiation of remote sensing image, field seismo-geological survey, analysis on drilling explora- tion materials, sampling and dating of rock samples, combined with seismicity and microscopic tectonic analysis, this paper studies the recent activity of Chihe segment of the Tanlu fault zone. The result indicates that the Chihe fault segment undergoes the deformation alternately in the mode of stick slip and creep during Late Quaternary, and its recent activity is mainly creep.展开更多
针对专业领域问答系统中推荐专家回答不准确与不及时的问题,提出一种基于兴趣度、权威度、信誉度和最近活跃度的专家推荐混合模型。采用加权的LDA主题模型获得专家兴趣主题分布,采用基于主题的PageRank算法计算专家的权威度;根据专家回...针对专业领域问答系统中推荐专家回答不准确与不及时的问题,提出一种基于兴趣度、权威度、信誉度和最近活跃度的专家推荐混合模型。采用加权的LDA主题模型获得专家兴趣主题分布,采用基于主题的PageRank算法计算专家的权威度;根据专家回答问题的质量计算专家的信誉度,根据专家历史回答问题的时间获得专家的最近活跃度。给出用户问题的分析方法,采用混合模型推荐最适宜的问题服务专家。为了验证模型的可行性和有效性,使用Stack Over Flow真实数据集进行分析实验。实验结果表明该方法能够有效地提高新问题专家推荐的准确率。展开更多
This paper deals with a new integrated method of reconstruction and forecasting of climatic changes in future. The method is based on proxy data pollen-spore analysis method, 14C analysis method, nowadays meteorologic...This paper deals with a new integrated method of reconstruction and forecasting of climatic changes in future. The method is based on proxy data pollen-spore analysis method, 14C analysis method, nowadays meteorological data, and data about of solar activity expressed in numbers of W （Wolf）. Here we present the results of investigation of sediments of the 2nd Fomich River terrace, Taymyr Peninsula, Russia. The formation of the peat bog started 10500 ± 140 years BP and continued during the entire Holocene. The pollen analysis of the sediment samples of the 2nd Fomich River terrace and the analysis of surface samples from a larch forest, typical of this region, reveals two phytochrones： both climatically preconditioned--tundra phytochrone （I1-4） and forest phytochrone （Ⅱ1-4）. The techniques of reconstruction and forecasting of basic elements of climate are presented and discussed in details.展开更多
Systematic research of the characteristics of late Quaternary activity of the middle part of Kouquan fault has been done through conducting 1∶50000 geologic mapping combining with remote sensing interpretation of spo...Systematic research of the characteristics of late Quaternary activity of the middle part of Kouquan fault has been done through conducting 1∶50000 geologic mapping combining with remote sensing interpretation of spot imaging, field validating and chronology research of the research area. Studies suggest that the middle part of Kouquan fault has had strong activity since the late Quaternary which controls the tectonic evolvement of the nearby mountains and Datong basin. The recent activity of this fault has faulted the sandy gravel layers of T1 terrace and the lower part of dark loessial soils over the terrace on the north of Chanfang village. The maximum vertical displacement is over 3m in the area between Xiaoyukou village and Louzikou village, and to the south of Dayukou village and the north of Emaokou village, the displacement decreases to 0.5m and 0.25m respectively. Based on the recent faulted landforms and combined with dating, we determined the age of recent activity of the fault in the research area to be between 7.71ka B.P. to 3.00 ka B.P. Discussions are made on this in combination with previous research.展开更多
基金Natural Science Foundation of Anhui Province (01045403) and Joint Seismological Science Foundation of China (102038).
文摘By means of differentiation of remote sensing image, field seismo-geological survey, analysis on drilling explora- tion materials, sampling and dating of rock samples, combined with seismicity and microscopic tectonic analysis, this paper studies the recent activity of Chihe segment of the Tanlu fault zone. The result indicates that the Chihe fault segment undergoes the deformation alternately in the mode of stick slip and creep during Late Quaternary, and its recent activity is mainly creep.
文摘针对专业领域问答系统中推荐专家回答不准确与不及时的问题,提出一种基于兴趣度、权威度、信誉度和最近活跃度的专家推荐混合模型。采用加权的LDA主题模型获得专家兴趣主题分布,采用基于主题的PageRank算法计算专家的权威度;根据专家回答问题的质量计算专家的信誉度,根据专家历史回答问题的时间获得专家的最近活跃度。给出用户问题的分析方法,采用混合模型推荐最适宜的问题服务专家。为了验证模型的可行性和有效性,使用Stack Over Flow真实数据集进行分析实验。实验结果表明该方法能够有效地提高新问题专家推荐的准确率。
文摘This paper deals with a new integrated method of reconstruction and forecasting of climatic changes in future. The method is based on proxy data pollen-spore analysis method, 14C analysis method, nowadays meteorological data, and data about of solar activity expressed in numbers of W （Wolf）. Here we present the results of investigation of sediments of the 2nd Fomich River terrace, Taymyr Peninsula, Russia. The formation of the peat bog started 10500 ± 140 years BP and continued during the entire Holocene. The pollen analysis of the sediment samples of the 2nd Fomich River terrace and the analysis of surface samples from a larch forest, typical of this region, reveals two phytochrones： both climatically preconditioned--tundra phytochrone （I1-4） and forest phytochrone （Ⅱ1-4）. The techniques of reconstruction and forecasting of basic elements of climate are presented and discussed in details.
基金jointly funded by the National Natural Science Foundation ( Grant No. 40972143)the Key Research Project of the 11th "Five-year Plan"of China Earthquake Administration( 1520945024)
文摘Systematic research of the characteristics of late Quaternary activity of the middle part of Kouquan fault has been done through conducting 1∶50000 geologic mapping combining with remote sensing interpretation of spot imaging, field validating and chronology research of the research area. Studies suggest that the middle part of Kouquan fault has had strong activity since the late Quaternary which controls the tectonic evolvement of the nearby mountains and Datong basin. The recent activity of this fault has faulted the sandy gravel layers of T1 terrace and the lower part of dark loessial soils over the terrace on the north of Chanfang village. The maximum vertical displacement is over 3m in the area between Xiaoyukou village and Louzikou village, and to the south of Dayukou village and the north of Emaokou village, the displacement decreases to 0.5m and 0.25m respectively. Based on the recent faulted landforms and combined with dating, we determined the age of recent activity of the fault in the research area to be between 7.71ka B.P. to 3.00 ka B.P. Discussions are made on this in combination with previous research.
