基于组件技术的地质剖面图自动绘制   总被引：2，自引：0，他引：2  

张渭军 《海洋测绘》2008,28(4):63-65

绘制地质剖面图是地质工作中的一项重要内容，研究了钻孔属性数据库的特点，利用Surfer绘制钻孔每一层等值线的基础上并在VisualBasic环境下，通过对GeoMap控件的二次开发，而在GeoMap控件中绘制任意两点的断面图，结合钻孔的层编号绘制出每一层断面的封闭区域，最后对该封闭区域进行填充，结果表明该方法是一种实用、高效的绘制方法。  相似文献   

粤东后江湾冲流带滩面高频振动及动力作用分析     

冯砚青  陈子燊  李志龙  李志强 《海洋通报(英文版)》2008,10(1):15-27

利用涌浪影响下短时段内的冲流带滩面高频高程数据和碎波带波流资料,在奇异谱分析(SSA)的基础上,以比研究了不同形态滩面的冲淤变化趋势、趋势分布形状、冲淤变化周期和冲淤变化强度,以及同一条剖面不同桩点间各因素间的变化关系;用交叉谱方法探索了每分钟滩面高频冲淤变化与碎波带长重力波间的作用关系.分析结果表明,滩角韵律地形引起的冲流分流作用促进了滩脊向滩谷的泥沙转运,冲流带滩面存在明显的长重力波频段的周期性冲淤振动,滩面冲淤振动强度由滩面下部向上部递减,碎波带长重力波对滩面高频冲淤变化起重要作用.  相似文献   

弱流场调制下的海面微波散射模拟研究          下载免费PDF全文

吕伟艳  赵朝方  杜涛 《海洋科学》2008,32(7):57-61

根据海面微波散射的多尺度模型以及波流相互作用理论，对一维弱流场调制下的海面微波散射截面进行了数值模拟。结果表明，利用数值方法直接求解波作用量方程获得的海浪调制谱并结合多尺度模型可以较好地模拟弱流场引起的雷达散射截面的变化。内波等海洋现象调制了海浪谱，使得雷达散射截面反映出这些海洋特征，整个调制过程的模拟对于分析这些海洋现象并更好地利用其雷达数据具有重要意义。  相似文献   

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范国胜  焦青 《大地测量与地球动力学》2008,28(6):27-30

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Statistical approach to determine the salinized ground water flow path and hydrogeochemical features around the underground LPG cavern,Korea     

Jeongho Lee  Ji‐Hoon Kim  Hun‐Mi Kim  Ho‐Wan Chang 《水文研究》2007,21(26):3615-3626

The ground water flow path of the coastal area in the Yellow Sea, Korea, was interpreted using both the cross‐correlation analysis of hydraulic properties and the principal component analysis (PCA) of ground water chemistry. Data was obtained from observation wells in the underground liquefied petroleum gas (LPG) cavern constructed in the coastal area of Pyeongtaek. Cross‐correlation results showed that the operating pressure became more influenced on artificial factors for the variation of the groundwater level of the study area (45–66% of correlation coefficient) even though its affecting area was limited to the region with fractures or faults, and also showed that the delay time from the variation of operating pressure to the fluctuation of ground water level were relatively long periods (28–31 days). Three hydrogeochemical events (encrusted cement dissolution, host rock dissolution, and seawater intrusion), which were dominantly influenced on ground water quality, could be induced from the result of PCA. Quantitative evaluation for these events using the mixed equation with principal component scores suggest that the dissolution of encrusted cement materials was the predominant factor (39·0% of the total mixed proportion) to change the chemical composition of the seepage water during the ground water flow from the observation wells to the cavern. Integration of the statistical results also imply that ground water flow and hydrogeochemistry were predominantly affected by artificial factors such as cavern operation pressure and dissolution of encrusted cement materials, which were interdependent factors on the observation wells with high cross‐correlation coefficients and pH. Copyright © 2007 John Wiley & Sons, Ltd.  相似文献   

嵌入式跨平台GIS应用中间件设计     

陈涛  翟京生  郭建忠  刘爱龙 《测绘科学技术学报》2014,(5)

为了解决嵌入式GIS跨平台的软件开发问题,针对嵌入式环境的资源有限性和平台多样性特点,设计了一种嵌入式GIS应用中间件——EGIS_MW平台,该平台能够有效屏蔽不同嵌入式软硬件环境的差异,为上层应用程序提供统一高效并且适合嵌入式GIS应用的编程接口。EGIS_MW平台已经在一款支持多种不同软硬件环境的嵌入式导航系统中得到了应用。应用表明该中间件能够很好地满足嵌入式GIS跨平台软件开发的技术需求。  相似文献   

三个文蛤家系双列杂交设计在两种环境下的配合力及杂种优势分析     

代平  王鸿霞  肖国强  刘保忠 《海洋学报(英文版)》2014,33(10):37-42

A 3×3 complete diallel cross comprising three families of the clam Meretrix meretrix(P1, P2 and P3) was used to determine the combining ability of parental families and heterosis of F1 under indoor and openair environments for growth traits. Analysis of variance for shell length and whole body weight indicated highly significant cross effects, environment effects and the interaction of cross by environment. General combining ability(GCA) and specific combing ability exhibited great variation among crosses and between two environments. Pooled over environments, P2 was the top combiner among the three parental families for both traits studied. The cross of P1 and P3 had the highest SCA. Additionally, significant reciprocal effects were observed. For individual environment, about half of the crossbred combinations showed favorable Mid-parent heterosis(MPH)(1%) for the shell length and whole body weight. Our data has shown that non-additive genetic and reciprocal effects constituted the major sources of genetic variation for both shell length and whole body weight, which indicates that crossbreeding among selective families could further explore the heterotic effects.  相似文献   

利用小波变换压制静态效应的方法     

区小毅 《物探与化探》2014,(6)

利用有限元大地电磁二维正演程序模拟了二层大地低阻静态效应的地电模型,研究了静态效应产生的原理及其影响,并利用小波变换方法对静态效应进行压制,相对于其他常规空间滤波法来说,取得了较好的压制效果,证实了小波变换方法在压制静态效应当中的可行性和有效性。用小波变换方法对某工区实测EH-4音频大地电磁资料数据进行分析、处理,从数学上识别和判断了静态效应,在较好地压制静态效应的同时又能较好地突出地层原本的地质异常。  相似文献   

基于SBAS/PS-InSAR技术的滑坡遥感监测对比研究     

付波霖  解淑毓  李涛  李豪  左萍萍  高二涛 《大地测量与地球动力学》2021,41(4):392-397

以2015~2019年12景ALOS-2 PALSAR2影像和2018~2019年38景Sentinel-1A影像为主要数据源,利用PS-InSAR和SBAS-InSAR技术提取西藏江达县波罗乡白格滑坡点的形变信息,并对处理结果进行交叉验证。研究得到以下结论：1）PS-InSAR技术条件下,ALOS-2数据和Sentinel-1A数据的平均形变速率范围为-68.9~37.9 mm/a和-64.5~24.2 mm/a;SBAS-InSAR技术条件下,ALOS-2数据和Sentinel-1A数据的平均形变速率范围为-84.2~-40.0 mm/a和-84.0~-13.0 mm/a。2）对2种数据结果中提取的4个特征点进行时序分析和定量分析显示,2种InSAR技术结果变化趋势较为一致,验证了两者在滑坡监测中的可靠性和准确性。  相似文献   

澳大利亚冷空气活动对西北太平洋热带辐合带强度的影响     

孙即霖  韦冬妮  李永平 《中国海洋大学学报(自然科学版)》2009,39(5)

利用1959～2004年纬向风的NCEP/NCAR候平均再分析资料分析和中国科学院大气物理研究所研制的9层大气环流模式(IAP9L-AGCM)数值试验,考察了南半球越赤道气流和澳大利亚冷空气活动对西北太平洋ITCZ和台风的影响。研究发现:100°E～165°E向北越赤道气流与ITCZ的强度增强具有明显的关系;10～15 d前130°E～140°E与150°E～160°E越赤道气流的加强对145°E～170°E位置上ITCZ强度的增加具有指示意义。越赤道气流强度对同期110°E～140°E经度ITCZ位置的变化也有影响。数值试验表明:南半球澳大利亚冷空气的活动是造成越赤道气流加强的重要原因,澳大利亚地区受较强冷空气影响时易造成100°E～160°E经度带越赤道气流的加强,特别是140°E～165°E的越赤道气流有利于ITCZ强度增加,导致西北太平洋热带气旋的发生和加强。  相似文献