排序方式: 共有59条查询结果,搜索用时 15 毫秒
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基于ArcObject二次开发的遥感影像裁切的实现 总被引:1,自引:0,他引:1
针对生产中批量影像裁切的实际情况,分析了遥感影像分幅裁切的特点,重点讨论了根据纠正后的遥感影像范围确定分幅图幅编号与批量裁切,而后利用Visual Basic 6.0对ArcObject进行了二次开发予以实现,并在生产中得以应用。 相似文献
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Jun Wang Ziyang Gao Lingyu Li Hongtao Fu Yuanqiang Cai 《Marine Georesources & Geotechnology》2013,31(2):245-255
ABSTRACTElectro-osmosis is a foundation treatment method for clay that is not widely used because of its nonuniform consolidation effect and high cost. To overcome these limitations, this study investigates fracture grouting. To determine the optimal grouting method, anode grouting, polyurethane grouting, and fracture grouting were first compared in one-dimensional electro-osmosis consolidation tests using self-made model boxes under an equal electric potential gradient, and then different solution concentrations were tested. By comparing the current, drainage rate, and coefficient of energy consumption during the electro-osmosis process, as well as moisture content, electrical conductivity, and shear strength after the tests, the moisture and shear strength of clay after electro-osmosis were found to be significantly improved by adding chemical reagents at the fracture. In addition, the optimum concentration of fracture grouting was determined to be 1.5%, and the shear strength after testing of clay that had been treated with sodium hydroxide was found to be higher than that of the control group. However, the effects of fracture grouting in the early stage were clearer than the effects of fracture grouting at later stages. 相似文献
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YANG Leilei SONG Ziyang LIU Yi WEI Guo ZHANG Xing MO Chenchen FENG Bo LI Yaohua 《《地质学报》英文版》2023,97(3):972-985
The Lucaogou Formation, located in the Jimsar Sag, Junggar Basin, NW China, has great potential for shale oil resources. In the process of CO2-EOR(CO2 enhance oil recovery), mineral dissolution, precipitation and transformation, leading to the local corrosion or blockage of reservoirs, have a significant influence on recovery. In this study, a combination of high-temperature and high-pressure laboratory experiments and coupled temperature/fluid-chemistry multifield numerica... 相似文献
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首先分析立体矢量采集、单片矢量采集及DOM矢鼍采集三种作业方法的误差源,进而推导DEM高程误差对矢量与影像纠正平面精度的影响,最后通过实例分析三种不同成图方法的平面精度.结果表明,立体矢量采集的精度高于单片矢量采集与DOM矢量采集,后两者的精度与DEM的精度有关.如果采取适当的作业措施,控制空三加密精度与DEM及DOM的精度,三种方法均能得到满足成图精度要求的矢量成果. 相似文献
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目的:构建20批杜仲黑茶指纹图谱,联合其抗氧化活性建立“谱-效”相关模型,结合网络药理学方法,预测其潜在抗氧化活性成分及生物通路和机制。方法:采用高效液相色谱(HPLC)法测定杜仲黑茶中主要成分含量;以化学计量学方法建立主要成分与抗氧化活性的相关性;通过TCMSP、Swiss Target Prediction、BATMAN-TCM等数据库获得杜仲黑茶高“谱-效”相关成分及靶点,通过PPI和KEGG分析对杜仲黑茶抗氧化活性成分及其作用机制进行靶向预测,进一步筛选潜在活性标志物。结果:基于杜仲黑茶指纹图谱对其9种主要成分采用Person相关性分析,筛选出7种潜在活性标志物,包括表没食子儿茶素没食子酸酯、芦丁、新绿原酸、绿原酸、原儿茶酸、没食子酸和槲皮素-3-0-桑布双糖苷。利用网络药理学方法构建了杜仲黑茶-特征成分-靶点网络,其中MAPK3、TNF、IL-6、CXCL8、VEGFA、JUN等为关键靶点,而杜仲黑茶抗氧化活性主要涉及氮代谢、TNF信号通路、HIF-1信号通路、VEGF信号通路、Rap1信号通路等。结论:采用“谱-效”相关和网络药理学方法进行杜仲黑茶抗氧化活性研究,为其质量控制提供了新的思路。 相似文献