Strain and competence contrast estimation from fold shape     

Stefan M. Schmalholz  Yuri Yu. Podladchikov 《Tectonophysics》2001,340(3-4):195-213

A new method to estimate strain and competence contrast from natural fold shapes is developed and verified by analogue and numerical experiments. Strain is estimated relative to the nucleation amplitude, A_N, which is the fold amplitude when the amplification velocities caused by kinematic layer thickening and dynamic folding are identical. A_N is defined as the initial amplitude corresponding to zero strain because folding at amplitudes smaller than A_N is dominantly by kinematic layer thickening. For amplitudes larger than A_N, estimates of strain and competence contrast are contoured in thickness-to-wavelength (H/λ) and amplitude-to-wavelength (A/λ) space. These quantities can be measured for any observed fold shape. Contour maps are constructed using existing linear theories of folding, a new nonlinear theory of folding and numerical simulations, all for single-layer folding. The method represents a significant improvement to the arc length method. The strain estimation method is applied to folds in viscous (Newtonian), power-law (non-Newtonian) and viscoelastic layers. Also, strain partitioning in fold trains is investigated. Strain partitioning refers to the difference in strain accommodated by individual folds in the fold train and by the whole fold train. Fold trains within layers exhibiting viscous and viscoelastic rheology show different characteristic strain partitioning patterns. Strain partitioning patterns of natural fold trains can be used to assess the rheological behaviour during fold initiation.  相似文献   

雨滴尺度谱谱参数和形状因子的分析     

周文贤  陈金荣  齐久成 《气象》1996,22(4):13-16

作者计算了３次降不过程的雨滴尺度谱参数，并进行Ｍ－Ｐ分布拟合和Г分布拟合。同时还计算了雨滴谱形状因子Ｓ（Ｚ，Ｒ），分析了形状因子与雨强之间的关系。  相似文献   

ICE Particle Size and Shape Effect on Solar Energy Scattering Angular Distribution     

Yao Key  Liu Chunlei 《大气科学进展》1996,13(4):505-510

The rare occurrence of te halos produced by cirrus ice crystals in nature has been investigated by modelling the incident solar (visible) light scattering angular distribution using the Monte Carlo/ray tracing method.The results show that the irregular shapes of ice crystals and large population of small ice particles in cirrus are responsible forthe rare occurrence of halos.  相似文献   

EVOLUTIONAL CHARACTERISTICS OF HYPER－CONCENTRATED FLOW IN BRAIDED CHANNEL OF THE YELLOW RIVER     

QI Pu  LI Wenxue 《国际泥沙研究》1996,(3)

ＥＶＯＬＵＴＩＯＮＡＬＣＨＡＲＡＣＴＥＲＩＳＴＩＣＳＯＦＨＹＰＥＲ－ＣＯＮＣＥＮＴＲＡＴＥＤＦＬＯＷＩＮＢＲＡＩＤＥＤＣＨＡＮＮＥＬＯＦＴＨＥＹＥＬＬＯＷＲＩＶＥＲ￥ＱＩＰｕ；ＬＩＷｅｎｘｕｅ（Ｓｅｎｉｏｒｅｎｇｉｎｅｅｒ，ＩｎｓｔｉｔｕｔｅｏｆＨｙ...  相似文献   

实际晶体形态计算机绘图   总被引：1，自引：0，他引：1  

周芬娜  王文魁 《地球科学》1992,17(2):159-169

  相似文献   

四川盆地区域化探扫面工作方法初步研究     

何真毅 《四川地质学报》1995,(2)

四川盆地可分为川东平行岭谷区、盆周低山丘陵区、川中丘陵区、川西平原区。论述了各区的采样对象及采样点密度。川东平行岭谷区及盆周低山区的化探成果对寻找非金属矿产及某些金属矿产效果显著。川中典型区土壤地球化学资料，能为农业、环境等多目标服务，对农业区划、科学施肥、合理种植、土壤改良等提供了重要的地球化学依据。证实了川西平原油气化探方法的有效性。  相似文献   

用图形演绎C程序运行的研究     

陈高云 《成都信息工程学院学报》1999,(4):11

说明了用图形方式展现C程序运行情况的必要性和可行性;介绍了用图形演绎C程序运行的总设计思想;详细介绍了图形界面设计要求和程序模块的功能要求。  相似文献   

从观鱼看庄子哲学的主旨     

康中乾 《广东海洋大学学报》2003,23(2):44-48

《庄子·秋水》篇中有一则庄、惠“濠梁观鱼”的故事 ,比较典型地表现了庄子的认识论思想 ,从审美的方法入手 ,在境界的意义上来看待 ,庄子哲学实质上是一种审美化的哲学 ,注重的是宇宙与人合二而一的本体论 ,即审美之“境”。  相似文献   

基于COM的3DGIS空间对象模型组件库的设计与实现     

钟静  王伟  熊汉江  彭小元 《测绘信息与工程》2006,31(2):34-36

提出了一种新的基于3D矢量图形、数字高程模型与数字正射影像相结合的空间对象模型的设计思想,并将COM组件技术引入到该模型的实现中。  相似文献   

三维激光扫描技术在船体外形测量中的试验性研究   总被引：5，自引：1，他引：5  

李欣  周佳玮  刘正国  胡震天 《测绘信息与工程》2006,31(6):36-37

介绍了三维激光扫描技术的测量原理,进行了21 m长船体外形测量的试验性研究,证明了其在快速、高效获取船体三维数据、提取船体型线方面有着较大的优越性。  相似文献