矿山开采沉陷动态参数预计方法的探讨     

陈南南  刘莹莹  周美霞 《北京测绘》2012,(4):5-7,99

开采沉陷动态参数预计是矿山开采沉陷学科的核心内容,它对开采沉陷的理论研究和生产实践都有重要意义。本文简要介绍开采沉陷动态参数预计的几种方法,采用编程语言Visual Basic 6.0进行开发,编制了概率积分法求取动态预计参数经验公式的程序。通过实例,取得了较满意的预计参数,对于矿区的开采有一定的指导意义。  相似文献   

基于最小二乘法的区域整体最优匹配选取控制点的方法     

李延成  李军  刘慧霞  梅琨  张明华 《测绘科学》2012,37(6):94-97

本文在对1∶500地形图与其自身影像图配准误差分析的基础上,提出了一种基于最小二乘法的区域整体最优匹配选取控制点的方法,主要针对在GIS中从地形图上选取控制点来配准影像图。本文在对新方法进行了论述,并通过对浙江温州地区一幅栅格图像与1∶500 GIS数据进行配准控制点选择实验,对比传统方法它能够克服由于影像分辨率和人工对影像刺点所带来的系统误差,大幅度提高配准精度,使得不同空间尺度下的地图数据实现精确配准。  相似文献   

一种计算区域内气象要素平均值的方法     

李秋林  彭嘉栋 《气象与减灾研究》2009,32(2):59-61

采用面积分的原理,提出了一种计算区域内气象要素平均值的新方法,通过对湖南全省温度、降水的平均值计算分析,对计算误差进行了检验。结果表明,采用该计算方法可以减少因气象台站分布不均匀对平均值的影响,计算得到的平均值更能反映实际情况。  相似文献   

Hydrodynamic characteristics of ship sections in shallow water with complex bottom geometry     

S. Sutulo 《Ocean Engineering》2010,37(10):947-958

The method of boundary integral equation developed by the authors was applied for computing inertial and damping characteristics of ship sections for the cases of multi-stepped and inclined bottoms. Comparative calculations for three typical ship hull sections were performed and analyzed. The frequency-dependent data computed for these ship sections can be used to assess the bottom geometry's influence onto the ship motions in waves by means of the strip theory. Limiting values of the same characteristics corresponding to the close-to-zero frequency can also be used for estimation of hydrodynamic forces in manoeuvring over shallow and confined waterways.  相似文献   

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田颜锋  李姗姗  刘晓刚  付国峰 《大地测量与地球动力学》2009,29(6):130-132

???????????????????o???????????????????????FIR??????????????????????????FIR????????????о??????????λ?????????????????????????????????????????????о?????????????????????任?е????Ч???  相似文献   

大坝GPS整体变形监测研究   总被引：1，自引：0，他引：1  

熊福文 《上海国土资源》2001,(4):59-61

本文探讨大坝GPS整体变形监测问题，文章设想了GPS整体变形监测方案并论证了大坝GPS监测可能达到的精度，最后指出只要选用设备，观测环境和观测方案恰当。GPS监测可满足大坝监测精度要求，实现高精度大坝变形监测自动化。  相似文献   

变磁化方向化磁极理论     

刘晓华  邹新民 《吉林大学学报(地球科学版)》1993,(1)

发展了磁偶层位势理论,证明沿任意方向磁化的磁偶层位势函数(1)在全空间有意义;(2)在曲面S上连续并有确定的极限;(3)当U(P)|_s、M~0(Q)给定时,M(Q)有唯一解,在此基础上,结合磁化方向与磁场分量方向互换定理,建立变磁化方向化磁极理论。  相似文献   

Terrain generalization with line integral convolution     

Bernhard Jenny 《制图学和地理信息科学》2021,48(1):78-92

ABSTRACT

Line integral convolution is a technique originally developed for visualizing vector fields, such as wind or water directions, that places densely packed lines following the direction of movement. Geisthövel and Hurni adapted line integral convolution to terrain generalization in 2018. Their method successfully removes details and retains sharp mountain ridges; it is particularly suited for creating generalized shaded relief. This paper extends line integral convolution generalization with a series of enhancements to reduce spurious artifacts, accentuate mountain ridges, control the level of detail in mountain slopes, and preserve sharp transitions to flat areas. The enhanced line integral convolution generalization effectively removes excessive terrain details without changing the position of terrain features. Sharp mountain ridgelines are accentuated, and transitions to flat waterbodies and valley bottoms are preserved. Shaded relief imagery derived from generalized elevation models is visually pleasing and resembles manually produced shaded relief.  相似文献   

Separating inner and outer Earth's magnetic field from CHAMP satellite measurements by means of vector scaling functions and wavelets     

C. Mayer  T. Maier 《Geophysical Journal International》2006,167(3):1188-1203

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综合地球物理勘查技术在地热勘查中的应用   总被引：3，自引：0，他引：3  

金永念  张登明  刘志平 《水文地质工程地质》2006,33(1):92-94,106

以张家港市西张镇地热资源勘查为例，在物性认识基础上，应用重力、航磁、直流电测深、可控源音频大地电磁测深等地球物理勘查技术，对查区地热水盖层、储层、导水构造进行研究；在物探建议的井位钻探，千米深度钻遇低温热水，井口水温45℃，单井出水量810m-1180m^3／d。  相似文献