分形几何与地球科学（续完）

分形几何与地球科学（续完）陈颙（国家地震局，北京１０００３６）·ＴｏｐｉｃａｌＬｅｃｔｕｒｅ·（７）ＦＲＡＣＴＡＬＧＥＯＭＥＴＲＹＡＮＤＧＥＯＳＣＩＥＮＣＥ（ＥＮＤ）￥ＣｈｅｎＹｏｎｇ（ＳｔａｔｅｓｅｉｓｍｏｌｏｇｉｃａｌＢｕｒｅａｕ，Ｂｅｉｊｉｎｇ...     

1999年7月份全球M≥5.0地震动态

根据中国地震局地球物理研究所中国数字地震台网数据管理中心（ＣＤＳＮＤＭＣ）从美国地震学合作研究会数据管理中心（ＩＲＩＳＤＭＣ）得到的资料,１９９９年７月份全球范围内共发生Ｍ≥５．０地震７７次（见表１）。其中Ｍ≥６．０地震８次,最大的一次地震发生在洪都拉斯,震级为６．６。本月发生的７７次Ｍ≥５．０地震中有５１次发生在东半球,２６次发生在西半球。根据中国数字地震台网记录统计,对于发生在我国境内的Ｍ≥５．０的地震事件,ＣＤＳＮ大部分台站有地震波形记录;对于发生在全球的Ｍ≥６．０的地震事件,ＣＤＳＮ各台…     

腰盘黄间隙的CT测量及其临床价值

目的 评价盘黄间隙对腰椎间盘突出的诊断价值。材料与方法 回顾性分析２００例腰椎间盘ＣＴ扫描资料，记录Ｌ３－Ｓ１间盘形态及双侧黄韧带厚度、盘黄间隙的宽度，分析这些结构与盘黄间隙狭窄及其对腰神经根压迫的关系。结果１９６个间盘突出或膨出，７８处黄韧带厚度＞５ｍｍ，腰盘黄间隙（ＤＦＬＳ）为腰间盘平面位于椎管外侧份间盘与黄韧带间的间隙。１７２侧显示腰神经根鞘受压，相应盘黄间隙平均宽度为（３．６± ０．８）ｍｍ。结论 ＤＦＬＳ＆ｐｏｕｎｄ；５ｍｍ为狭窄，主要原因包括；间盘突出或膨出、黄韧带肥厚等。它可以作为腰间盘突出伴神经根压迫的可靠依据。     

分形几何与地球科学

分形几何与地球科学陈颙（国家地震局，北京１０００３６）ＦＲＡＣＴＡＬＧＥＯＭＥＴＲＹＡＮＤＧＥＯＳＣＩＥＮＣＥ￥ＣｈｅｎＹｏｎｇ（ＳｔａｔｅＳｅｉｓｍｏｌｏｇｉｃａｌＢｕｒｅａｕ，Ｂｅｉｊｉｎｇ１０００３６）编者按：分形几何与非线性动力学是近年来国际...     

分形几何与地球科学（续）

分形几何与地球科学（续）陈颙（国家地震局，北京１０００３６）·ＴｏｐｉｃａｌＬｅｃｔｕｒｅ·（３）ＦＲＡＣＴＡＬＧＥＯＭＥＴＲＹＡＮＤＧＥＯＳＣＩＥＮＣＥ（ＣＯＮＴＩＮＵＯＵＳ）￥ＣｈｅｎＹｏｎｇ（ＳｔａｔｅｓｅｉｓｍｏｌｏｇｉｃａｌＢｕｒｅａｕ，Ｂ...     

SOIL LOSS INFLUENCED BY SLOPE LENGTH IN THE HILLY LOESS REGION, CHINA

ＳＯＩＬＬＯＳＳＩＮＦＬＵＥＮＣＥＤＢＹＳＬＯＰＥＬＥＮＧＴＨＩＮＴＨＥＨＩＬＬＹＬＯＥＳＳＲＥＧＩＯＮ，ＣＨＩＮＡＣＡＩＱｉａｎｇｇｕｏ１ａｎｄＳｈｉＵ－ＨｕｎｇＬＵＫ２Ｉ．ＩＮＴＲＯＤＵＣＴＩＯＮＳｌｏｐｅｌｅｎｇｔｈｈａｓｌｏｎｇｂｅｅｎｒｅｃ...     

A NON-DIMENSIONAL COUPLED NUMERICAL MODEL OF ALLUVIAL FLOW

ＡＮＯＮ－ＤＩＭＥＮＳＩＯＮＡＬＣＯＵＰＬＥＤＮＵＭＥＲＩＣＡＬＭＯＤＥＬＯＦＡＬＬＵＶＩＡＬＦＬＯＷＳａｉｅｄＳＡＩＥＤＩ（ＴｈｅｔｅｘｔｉｓａｂｒｉｄｇｅｄｂｙＤｒ．ＤＩＮＧＬｉａｎｚｈｅｎ）（ＷａｔｅｒＲｅｓｅａｒｃｈＬａｂｏｒａｔｏｒｙ，Ｓｃ...     

分形几何与地球科学（续）

分形几何与地球科学（续）陈顒（国家地震局，北京１０００３６）·ＴｏｐｉｃａｌＬｅｃｔｕｒｅ·（６）ＦＲＡＣＴＡＬＧＥＯＭＥＴＲＹＡＮＤＧＥＯＳＣＩＥＮＣＥ（ＣＯＮＴＩＮＵＯＵＳ）￥ＣｈｅｎＹｏｎｇ（ＳｔａｔｅｓｅｉｓｍｏｌｏｇｉｃａｌＢｕｒｅａｕ，Ｂ...     

分形几何与地球科学（续）

分形几何与地球科学（续）陈（国家地震局，北京１０００３６）·ＴｏｐｉｃａｌＬｅｃｔｕｒｅ·（４）ＦＲＡＣＴＡＬＧＥＯＭＥＴＲＹＡＮＤＧＥＯＳＣＩＥＮＣＥ（ＣＯＮＴＩＮＵＯＵＳ）￥ＣｈｅｎＹｏｎｇ（ＳｔａｔｅｓｅｉｓｍｏｌｏｇｉｃａｌＢｕｒｅａｕ，Ｂｅ...     

分形几何与地球科学（续）

分形几何与地球科学（续）陈颙（国家地震局，北京１０００３６）·ＴｏｐｉｃａｌＬｅｃｔｕｒｅ·（５）ＦＲＡＣＴＡＬＧＥＯＭＥＴＲＹＡＮＤＧＥＯＳＣＩＥＮＣＥ（ＣＯＮＴＩＮＵＯＵＳ）￥ＣｈｅｎＹｏｎｇ（ＳｔａｔｅｓｅｉｓｍｏｌｏｇｉｃａｌＢｕｒｅａｕ，Ｂ...     

A Monte Carlo study of rainfall forecasting with a stochastic model

A procedure for short-term rainfall forecasting in real-time is developed and a study of the role of sampling on forecast ability is conducted. Ground level rainfall fields are forecasted using a stochastic space-time rainfall model in state-space form. Updating of the rainfall field in real-time is accomplished using a distributed parameter Kalman filter to optimally combine measurement information and forecast model estimates. The influence of sampling density on forecast accuracy is evaluated using a series of a simulated rainfall events generated with the same stochastic rainfall model. Sampling was conducted at five different network spatial densities. The results quantify the influence of sampling network density on real-time rainfall field forecasting. Statistical analyses of the rainfall field residuals illustrate improvement in one hour lead time forecasts at higher measurement densities.     

Earthquake Engineering and Engineering Vibration Aims And Scope

正This journal is established by the Institute of Engineering Mechanics(IEM),China Earthquake Administration,to promote scientific exchange between Chinese and foreign scientists and engineers so as to improve the theory and practice of earthquake hazards mitigation,preparedness,and recovery.To accomplish this purpose,the journal aims to attract a balanced number of papers between Chinese and     

Foreword

Destructive earthquakes have caused great damage in China and the United States and collapsing buildings havecaused many deaths and injuries. The field of earthquake engineering studies earthquake hazards, the occurrence ofearthquakes of various magnitudes, the nature of the ground shaking during an earthquake, the vibration of structuresduring earthquakes, the strengthening of existing structures and the design of new structures to be earthquake resistant,and finally, how to cope with earthquake damage and restore a city to normal functioning. Such efforts are in progressin both countries, but unfortunately, the language barrier interferes with the free flow of information between China andthe Untied States. It would be mutually beneficial if some means could be developed to promote the exchangeof information across the Pacific Ocean. This new journal has been established for this purpose and its success willbe an important step in promoting earthquake engineering in China and the United States.     

WORLD ASSOCIATION FOR SEDIMENTATION AND EROSION RESEARCH(WASER)

正President:Giampaolo Di Silvio,Italy Vice Presidents:Ulrich C.E.Zanke,Germany Zhao-yin Wang,China The World Association for Sedimentation and Erosion Research(WASER),inaugurated on Oct.19,2004,is an independent non-governmental,non-profit organization.The mission of WASER is to promote international co-operation on the study     

Enhancing remote sensing research on global change to improve our understanding on Earth system processes

正Global Change includes climate change and other environmental changes caused by the joint interaction among various layers of Earth. From the positive side, global change provides new opportunities to human and other living forms on Earth. In the meantime, it creates tremendous challenges and negative impact. At present, the negative impacts have reached all primary processes of the global ecosystem and every aspect of human society, especially causing degradation of the ecosystem. For instance, intensive deforestation causes decline of biodiversity; global warming causes sea level rise and increases     

SCIENCE CHINA Earth Sciences SUBJECT INDEX TO VOLUME 57(2014)

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