钻孔导井法施工竖井在呷村矿溜矿井的应用

竖井传统施工方法进度慢,施工难度大,成本高。当其有下部通道时,选择钻孔导井法施工,则可以大大缩短工期,降低成本,具有明显的优越性。以呷村矿山溜井工程实践为例,探讨了钻机导井法施工竖井的关键工艺。     

利用SPOT卫星遥感影像测绘1：50000地形图的探讨

目前，高分辨率的卫星遥感影像逐步商业化，国内外不断把卫星遥感影像应用于测绘领域。本文主要分析，研究利用SPOT卫星遥感影像测绘1：50000地形图的地理精度和地物判断能力，认为在山地，高山地地区基本上可以利用SPOT卫星遥感影像测绘1：50000地形图。     

浙江某高层预应力管桩偏位和上浮处理实例分析

结合工程实例分析了预应力管桩产生偏位的原因,介绍了偏位预应力管桩的处理方法。首先测量每根管桩的桩顶偏位和上浮情况,然后对所有管桩进行低应变动测,确定桩身损伤情况及缺陷部位,最后根据管桩偏位和损伤情况采取有针对性的处理措施。工程中对上浮桩采用复打复压处理;对严重偏位且断裂桩进行补预应力管桩处理;对偏位超过规范值但桩身质量完好的桩进行纠偏扶正处理;对偏位较大且桩身有损伤的桩进行先纠偏扶正,并在管桩内芯放钢筋笼灌芯加固处理;对群桩大面积偏位损伤部分由于处理后承载力达不到设计要求需要采用补桩处理。建筑物经上述处理后的实测最大沉降仅为 9 mm,且沉降较为均匀。     

浅议高精度遥感正射影像的获取

阐述了应用高分辨率卫星WorldView-2获取的地球表面沈阳市域影像数据制作沈阳市正射遥感影像图的工艺,并介绍了VirtuoZo NT（全数字摄影测量系统）及ENVI（遥感地物定量化工具）、EPT（易拼图）在制作正射影像图过程中的应用。     

Approximate approaches to geometric corrections of high resolution satellite imagery

The exploitation of different non-rigorous mathematical models as opposed to the satellite rigorous models is discussed for geometric corrections and topographic/thematic maps production of high-resolution satellite imagery (HRSI). Furthermore, this paper focuses on the effects of the number of GCPs and the terrain elevation difference within the area covered by the images on the obtained ground points accuracy. From the research, it is obviously found that non-rigorous orientation and triangulation models can be used successfully in most cases for 2D rectification and 3D ground points determination without a camera model or the satellite ephemeris data. In addition, the accuracy up to the sub-pixel level in plane and about one pixel in elevation can be achieved with a modest number of GCPs.     

缺少控制点的WorldView-2卫星影像正射纠正

WorldView-2卫星是全球第一批使用了控制力矩陀螺的商业卫星,可以更精确的瞄准和扫描目标,先进的地理位置技术使扫描的精确度上有了非常大的进步。WorldView-2卫星在无控制的条件下有较高的定位精度,利用少量控制点能消除系统误差达到较高的平面精度,能很好的应用到控制点困难的地区。本文主要是对WorldView-2卫星图像进行区域网平差的正射纠正实验,并对纠正精度进行分析。     

多源遥感影像高精度自动配准的方法研究

提出并发展了一套对多源遥感影像(不同传感器、不同分辨率、不同时相的遥感影像)的高精度自动纠正与配准技术与方法。遥感影像首先通过一个多项式模型进行整体粗纠正,然后在待配准影像上提取均匀分布的特征点。以提取的特征点为引导,利用金字塔逐层模板匹配的方法获得配准用同名控制点,基此构建不规则三角网将影像分解为各三角形区域,在每个三角形范围内实现逐三角网的高精度影像纠正与配准。     

JX4与VirTuoZo立体像对内定向数据共享

定向建模是立体测图的一项基本工作,是制作各种成果数据的基础,由于目前主流的两款软件（VirTu0Zo和JX4）的定向数据都有其自身的数据表达方式,互转复杂繁琐,很难实现数据的共享,本文针对此问题进行分析研究,找出了解决方案和实现方法,并应用于生产,提高了实际生产效率。     

Fortnightly and monthly variability of the exchange through the Strait of Gibraltar

The fortnightly and monthly variability of the exchange through the Strait of Gibraltar has been studied from two simultaneous five-month long moored datasets, at Camarinal Sill and the East Section. The study focuses on the M_sf and M_m tidal components and their role for the subinertial exchange. A significant monthly signal is observed in the upper layer transport. Also, a significant fortnightly signal is observed in the lower layer transport, which minimum (maximum flow toward the Atlantic) takes place approximately on spring tides. In consequence the net transport has both signals, with maximum taking place during neap tides and a small monthly inequality. Fortnightly and monthly variability in the interface depth is also observed at Camarinal Sill, the interface being deeper on neap and shallower on spring tides. At the East Section the interface depth signals are not significant.The subinertial variability of the transports is separated in two contributions. The first one is called quasistatic transport and arises from the subinertial fluctuations of currents. The second contribution, called tidally rectified transports, arise from the non-linear correlation of currents and interface depth at tidal frequencies. The tidally rectified transports are important at Camarinal but not at the East Section. An apparent contradiction between the fortnightly signals of the subinertial currents and subinertial transports is resolved when the fortnightly signal of the tidally rectified transports are considered. The fortnightly signal of the quasistatic and tidally rectified transports mutually cancel in the upper layer, but not in the lower layer where the rectified transports dominate. A simple model for the spring-tide mixing forcing accounts for the fortnightly variability of the lower layer quasistatic transports but underestimates it for the upper layer. Finally, the observed lower layer transport is compatible with the hydraulic control condition at Camarinal Sill except for certain periods during intense spring tides.