基于MATLAB图像处理工具箱IPT函数的遥感图像配准

遥感图像配准是遥感图像拼接、信息融合的基础,是对遥感图像定量应用和研究的关键环节.MATLAB的图像处理工具箱IPT(Image Processing Toolbox)提供有基于点特征进行图像配准的函数,利用这些函数可以方便快捷地完成图像之间的配准.论文首先对图像配准及基于点特征的遥感图像配准作了详细的介绍,然后对IPT中配准函数的语法格式作了详尽的分析,并对两幅遥感图像进行了配准操作,最后对该方法进行了结论性分析,阐明该方法的应用价值与可改进之处.     

免棱镜全站仪测距性能的测试及精度分析

介绍了免棱镜全站仪的基本特点和性能;对Nikon DTM-352免棱镜全站仪在无反射棱镜条件下的测距性能进行了多方面的测试,包括照准不同材质和不同颜色的反射目标测距、以不同的入射角(激光束与目标面之间的夹角)测距、瞄准不同透明度的反射面测距以及对物镜加罩测距,并通过对大量的测试结果进行精度分析,得出了一些对实际工作有参考价值的结论。     

REE Abundance and REE Minerals in Granitic Rocks in the Nanling Range,Jiangxi Province,Southern China,and Generation of the REE‐rich Weathered Crust Deposits

Studies of Mesozoic granites associated with rare earth element (REE)‐rich weathered crust deposits in southernmost Jiangxi Province indicate that they have high‐K to shoshonite compositions and belong to ilmenite‐series I‐type granites. Of the studied rocks at 59–292 ppm of bulk REE content, the highest are seen in the biotite granites of Dingnan (358, 429 ppm) and mafic biotite granite of the Wuliting Granite (344 ppm) near the Dajishan tungsten mine, both areas where weathered‐crust REE deposits occur. REE‐bearing accessory minerals in these granites are mainly zircon, apatite and allanite, and REE‐fluorocarbonates are common. REE enrichment occurs in the rims of apatite crystals, and in fluorocarbonates that occur along grain boundaries of and cracks in major silicate minerals, and in fluorocarbonates that replaced altered biotite. It is therefore thought that a major part of the REE content of these granites was concentrated during deuteric activity, rather than during magmatic crystallization. The crack‐filling REE‐fluorocarbonates could subsequently have been easily leached out and deposited in weathered crust developed during a long period of exposure.     

塔里木盆地巴楚地区中奥陶统一间房组露头礁滩复合体储层地质建模及其对塔中地区油气勘探的启示

通过1：5万礁滩复合体地质填图,在巴楚地区共发现大小不等的礁滩复合体90余个,层位为中奥陶统一间房组二段．台缘为礁滩复合体密集发育区,礁滩体规模大,台内为礁滩复合体零星发育区,礁滩体规模小。通过对6个典型礁滩复合体的解剖,研究了礁滩复合体的微相类型、组合和各微相的岩石特征、生物群落,并对其生长发育阶段进行了分析。根据6个典型礁滩复合体及礁间的大量铸体薄片鉴定和物性资料,分析了储层的特征、成因和非均质性,建立了台缘礁及礁间、台内礁及礁间2种背景条件下的储层地质模型。巴楚地区露头礁滩复合体储层地质模型对塔中地区上奥陶统良里塔格组礁滩复合体的勘探具有重要的指导意义,并为勘探实践所证实。     

杭州湾岸线变迁与城市规划建设

本文较系统地阐述了杭州湾沿岸平原第四纪地质与地貌特征,扼要分析了钱塘江与杭州湾岸线的变迁历史及其演变趋势。在此基础上,指出海平面持续上升带采的一系列环境问题是未来杭州湾海岸带面临的主要威胁,并对环杭州湾城市化发展规划提出了若干建议。     

江西省九岭区地质灾害危险性区划

对九岭区地质灾害发育的基本特征及其地质环境条件进行了概述,并对其形成条件进行了相关性分析;通过对地质灾害发育的基本规律、控制因素、触发因素与地质灾害关系的分析,采用环境地质学原理,建立区域地质灾害空间预测模型,圈定九岭区地质灾害的危险性分区,为实时地质灾害时间预警预报圈定有效的空间靶区。预测单元采用规则的栅格(500m×500m),共14415个单元;评价指标主要包括地形地貌、工程地质岩类、地质构造、破坏地质环境人类工程活动等四大类26个因子;利用GIS技术,提取出相关的数据信息;信息量预测方程:Ii=-1.164X1-0.999X2-0.681X3 …… 0.203X25-0.135X26(其中X1、X2、X3、…X26取1或0,即某单元中存在某种因素时取1、否则取0),据此计算出各单元格的信息量;根据地质灾害危险性分区临界指标,确定单元格的地质灾害危险性等级;合并同类项,并考虑类似的地质、自然环境具有类似的地质灾害问题的原则,进行归并与单元边界线的修改,得出九岭区地质灾害危险性分区。     

浙闽山区茶叶生产基地评价的探讨

茶叶基地的评价包括对基地的自然和经济条件的评估,应用系统分析方法,将自然和经济条件进行定量的综合评估,用综合评价值区分基地间的差异,最后定性与定量相结合,提出茶叶生产基地的合理布局.     

基于消息通知机制的国省数据共享系统的设计与实现

为解决卫星广播传输缺陷及省级用户获取临省实时观测资料和实况分析产品等迫切的业务需求，设计并实现了基于消息通知机制的国省数据共享系统。系统基于RabbitMQ的消息机制进行业务和数据资源的整合及集成，采用多层体系架构，满足基于地面宽带的数据快速有序下载和卫星广播数据补调等国省数据共享需求，支持大容量多种数据的高速传输，支持HTTP、FTP、SFTP等多种数据传输协议。系统已经上线提供服务，实现智能网格、多源融合实况分析等25种气象资料的国省数据共享，月平均共享数据量达6.3 TB，且建立全流程监视，有效保障数据共享的时效性。     

2021年2月26日东北地区地磁日变畸变异常分析

2021+年2+月26+日辽宁及周边地区多个台站地磁Z7分量日变化幅度显著减小,通过调查异常日空间环境和周边人为活动等干扰,利用逐日比量化磁场幅度畸变量,并基于Kriging法模拟研究区逐日比空间分布,最后结合东北地区已有观测数据和历史地震的时空关系得出结论,认为此次异常为震前信息的可能性较高,异常区可能反映的是:异常日未来中短期内郯庐断裂带北端地区的地震活动有增强的趋势.     

Observations of the Orion Nebula in Hα, [NII] and Hβ lines

Monochromatic photographs of the Orion Nebula taken through narrow bandpass interference filters (Δλ=10 Å) centred on Hα, Hβ and [NII] lines are presented. Ratio contours of Hα/[NII] and Hα/Hβ are derived. They enable a detailed study of the point-to-point variation in ionization structure and temperature throughout the nebula. Dust located within the ionized gas is studied from the Hα/Hβ ratio which varies from point to point over the nebula. Its strongest concentration, apart in the obvious ‘dark bay’, occurs in a shell surrounding the exciting stars, with about 2′ of diameter. Close to Θ¹ Ori the Hα/Hβ ratio, corrected for interstellar reddening, is about 3.0 in good agreement with the predicted value (Brocklehurst, 1971). To account for these measures, the following arguments are proposed:

1. Dust grains are completely or partially destroyed in region close to the exciting stars.
2. Radiation pressure and stellar wind push the remaining dust up to some equilibrium distance outwards. The consequence of this action is obviously the formation of a ‘dust mantle’ which is seen as a ring in projection.