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151.
By utilizing a 3-D atmospheric circulation resolving method, the authors studied the air-sea
interactive linkages between the tropical Indian Ocean and the Pacific Ocean in 1979-2008 El
Ni?o-Southern Oscillation (ENSO) events. Their findings showed that evident 3-D gear-coupling
characteristics existed in the 1979-2008 ENSO events. Their resolving analyses also suggested that the
general circulation showed stronger and wider sinking motions over the eastern Indian Ocean-western
Pacific during the mature phase of 1979-2008 ENSO events, compared with the vertical velocities from the
U.S. National Centers for Enviornmental Prediction (NCEP) reanalysis data. With their 3-D analysis
method, the vertical velocity was resolved by two components, i.e. zonal and meridional components. It
was found that the zonal component of the vertical velocities showed a strong sinking motion while the
meridional components showed an upward motion during the prevailing phases of the ENSO events. In the
tropics, the zonal component of the vertical velocities was found greater than the meridional component,
reflecting the dominant characteristics of the vertical velocity, and the overall outcomes showed a strong
sinking motion, although the two components also partially offset each other in the processes. Compared
with the vertical velocities from NCEP reanalysis, the vertical motions calculated with the 3-D resolving
analysis method demonstrate some advantages. 相似文献
152.
基于IDL的地质体真三维重构与可视化探讨--以福州市地热田热储结构为例 总被引:1,自引:0,他引:1
地质构造三维可视化可以将地质勘探数据用直观的图形方式显示,是正确认识地质构造和理解地热田区域透水层分布重要手段,从而为地热开发利用提供科学依据。本文应用不规则三角网(TIN)表面法和克里格(kriging)算法,对已知钻孔数据进行三角剖分和插值,构建三维体数据,从而实现地质三维重构。基于IDL开发环境,采用光线投射法和zbuffer相结合的直接体绘制算法,实现地质三维分析和可视化。并以福州市地热田热储结构为例,实现了地质真三维交互式切割分析、显示和查询。 相似文献
153.
《The Journal of geography》2012,111(5):217-218
Abstract Project GeoSim is a multidisciplinary effort by members of Virginia Tech's Departments of Geography and Computer Science, College of Education, and Learning Resources Center to develop computer-aided education (CAE) software for introductory geography and related classes. GeoSim laboratory exercises draw on the five fundamental themes of geography for their subject matter. The programs emphasize interactive learning combining the information capabilities of Geographic Information Systems (GIS) with the techniques of computer simulation. The result is a series of geographic explorations that will make available some of the most exciting aspects of geography to a potential audience of 425,000 introductory geography students per year. 相似文献
154.
吕新荣 《CT理论与应用研究》2011,20(1):73-82
颅骨是人体中最重要的组成部分之一,起着保护和支撑脑部组织的作用.现实中由于种种原因,许多人承受着颅骨缺损的痛苦,不仅影响外观,而日还可能导致脑组织损坏.如何有效地修复缺损的颅骨成了国际研究的热点.目前,医生主要是通过观察病人的CT影像确诊病人颅骨损坏情况,并通过手工制作修复体,这极大地依赖于医生的技术和经验.为了解决这... 相似文献
155.
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157.
During the period of 3—5 August 1996(for short “96.8”),an extraordinary rainstorm eventoccurred in Henan,Hebei and Shanxi Provinces in China,resulting in severe flood catastrophe.Synoptic analyses indicated that the stable gross col field and the interaction between a northwardmoving typhoon(down into low pressure)and its east lateral Pacific subtropical high were thelarge-and meso-scale circulation conditions of the “96.8” extraordinary rainstorm.The mesoscaletyphoon-low and its specific dynamical and thermodynamical structures were directly related to thisrainstorm event.The nonhydrostatic version of mesoscale numerical model MM5 was used toconduct investigation of numerical simulation for this case.The simulation with the full physicalprocesses of nonhydrostatic version MM5 was basically possessed of a capability to reproduce thegenesis,development and evolution of the large-scale and meso-α scale synoptic systems.Thesimulative results using a two-way interactive nesting procedure revealed that the typhoon-low waspossessed of an intensive coupled mechanism between the dynamical and thermodynamical fields,namely,the developing typhoon-low was possessed of a structure of the.cyclonic vorticity columnwith warm center and high humidity,the vorticity column on the lower levels was the moistconvective instability and negative moist potential vorticity structure:the intensive ascendingvertical motion and the intense divergence on upper levels and intensive convergence on the lowerlevels as well as the development of the convective cloud cluster were intercoupling:the intensesouthern wind jet companied by the typhoon-low was not only the interaccompanying andintercoupling condition of the development and maintenance of the typhoon-low and convectivecloud cluster,but also was the transportable belt of the moisture source and heat energy of the“96.8”extraordinary rainstorm.The analysis of simulative results of precipitation indicated thatthe distribution of the rainfall belt and rainfall rate was basically consistent with that of theobservation in spite of some rainfall centers less or larger than those of the observation for coarseor fine mesh domain,respectively. 相似文献
158.
申洪军 《成都信息工程学院学报》2003,18(2):220-222
阐述了英语交际教学中,教学双方的锐意进取不仅能保证外语教学的顺利进行,而且还能有效促进大学英语教学,提高教学质量。详细研究了互动作用及非语言因素对教学的影响。 相似文献
160.