一个剪切位移公式的几何证明     

刘瑞珣  吕古贤  王世锋  夏林 《高校地质学报》2003,9(1):123-127

剪切位移测量公式是研究韧性剪切带中的常用公式，但该公式的代数推导较为复杂，难以被构造地质学研究领域的人们所接受，作者提出了更直观和易董剪切位移测公式的几何证明法。  相似文献   

数学分析七大定理的相互证明     

李寒 《气象教育与科技》1999,21(3):25-28

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建筑物防雷工程设计平台          下载免费PDF全文

王云 《陕西气象》2005,(2):36-37

系统在Windows 98／2000环境下使用VB6．0开发。程序力求简单快捷、易于操作，注重可靠性及安全性，在防雷工程设计中有较强的现实意义和广阔的应用前景。实践证明，使用该平台，不仅节省了防雷工程设计人员大量宝贵的时间，提高了工作效率，也是推动防雷设计走向科学化、规范化、智能化的重要条件。  相似文献   

Predictability of winter rainfall in South China as demonstrated by the coupled models of ENSEMBLES   总被引：1，自引：0，他引：1  

Se-Hwan  YANG  LI Chaofan  LU Riyu 《大气科学进展》2014,31(4):779-786

Winter rainfall over South China shows strong interannual variability,which accounts for about half of the total winter rainfall over South China.This study investigated the predictability of winter （December-January-February; DJF） rainfall over South China using the retrospective forecasts of five state-of-the-art coupled models included in the ENSEMBLES project for the period 1961-2006.It was found that the ENSEMBLES models predicted the interannual variation of rainfall over South China well,with the correlation coefficient between the observed/station-averaged rainfall and predicted/areaaveraged rainfall being 0.46.In particular,above-normal South China rainfall was better predicted,and the correlation coefficient between the predicted and observed anomalies was 0.64 for these wetter winters.In addition,the models captured well the main features of SST and atmospheric circulation anomalies related to South China rainfall variation in the observation.It was further found that South China rainfall,when predicted according to predicted DJF Nifio3.4 index and the ENSO-South China rainfall relationship,shows a prediction skill almost as high as that directly predicted,indicating that ENSO is the source for the predictability of South China rainfall.  相似文献