智能矿山系统的应用与开发

我国能源发展以煤炭为主,其中,95%以上的煤炭产量来自井工开采,井工开采引起的地面塌陷会造成建(构)筑物和土地等的破坏;为此,本文通过收集资料和分析工程的实际需求,利用VC++编程研发了矿山数据库管理与沉陷预警系统;系统包括矿山数据库管理模块和沉陷预警模块,包含矿区采空区上方建(构)筑物、土地等的移动变形分析,并为损坏等级评定提供参考。     

基于库伊克模型的地面沉降预测分析

针对地面沉降与地下水水位变化的内在关系,考虑地面沉降受到自身变化规律的影响,建立基于库伊克变换的地面沉降预测模型,应用该模型对某地区地面沉降统计数据进行模拟预测,有效实现该地区地面沉降与地下水水位以及本身之间的定量模拟,并探讨模型的拟合效果和预测精度。结果表明库伊克模型拟合效果较好,预测精度较高,能较好地反映研究区域的地面沉降变形趋势。     

基于灰度归一化的HJ-1A星HSI图像条带噪声去除方法

针对HJ -1A星HSI图像上的条带噪声,在分析传统条带噪声去除方法的基础上,提出了一种新的基于灰度归一化去除条带噪声的方法.首先,设计孤立点检测窗口,将随机斑点噪声与条带噪声分离;然后,利用灰度归一化方法建立图像各列像元灰度级与基准列像元灰度级对应的查找表,根据查找表对HSI图像条带噪声进行消除.实验结果表明,该方法在很好地保留图像光谱信息的情况下,能够有效地消除图像条带噪声和随机斑点噪声.     

GPS水准高程在大比例尺地形测量中的精度分析

主要介绍了GPS工程的拟合的原理与方法,结合具体说明了GPS水准高程在大比例地形测量中的可行性,并对其方法的精度进行分析讨论,为以后GPS在地形测量中的运用提供了理论依据,为在地形测量中提高GPS的精度提出了相关政策.     

基于水平集的海岛（礁）提取

提出了适合航空影像区域分割的水平集运算策略,将原始影像首先进行格网分类,对分类后的海岸线格网进行水平集运算提取精确海岛（礁）边缘,并采用多核编程策略提高运算效率。实验表明该方案效果理想,能够正确提取海岛（礁）区域。     

一级检查在航测外业调绘中的应用与探讨

结合工作实践,主要探讨了一级检查在1：5000及1：10000航测外业调绘工作中的应用,并对如何提高产品质量做一定的思考和研究。     

抵偿高程面任意带高斯投影坐标系统的变形分析及应用

对投影变形问题进行了分析,结合实例,探讨了抵偿高程面任意带高斯投影对控制投影变形的实用性。     

GNSS与三角高程在公路跨河中的应用分析

主要研究利用GNSS无约束平差控制网数据和三角高程进行跨河高程测量,结合电子水准仪运用常规水准测量的方法测得高差,通过对比三种跨河水准测量,分析GNSS跨河高程测量与三角高程测量数据精度,从而依实际工作环境选择最优的跨河方式。     

GPS接收机内部噪声水平测试方法研究

阐述了在GPS精度鉴定系统中,针对短基线快速检核GPS接收机内部噪声水平测试方法进行研究,并结合试验验证了方法的可靠性.     

The determination of potential difference by the joint application of measured and synthetical gravity data: a case study in Hungary

In an elementary approach every geometrical height difference between the staff points of a levelling line should have a corresponding average g value for the determination of potential difference in the Earth’s gravity field. In practice this condition requires as many gravity data as the number of staff points if linear variation of g is assumed between them. Because of the expensive fieldwork, the necessary data should be supplied from different sources. This study proposes an alternative solution, which is proved at a test bed located in the Mecsek Mountains, Southwest Hungary, where a detailed gravity survey, as dense as the staff point density (~1 point/34 m), is available along a 4.3-km-long levelling line. In the first part of the paper the effect of point density of gravity data on the accuracy of potential difference is investigated. The average g value is simply derived from two neighbouring g measurements along the levelling line, which are incrementally decimated in the consecutive turns of processing. The results show that the error of the potential difference between the endpoints of the line exceeds 0.1 mm in terms of length unit if the sampling distance is greater than 2 km. Thereafter, a suitable method for the densification of the decimated g measurements is provided. It is based on forward gravity modelling utilising a high-resolution digital terrain model, the normal gravity and the complete Bouguer anomalies. The test shows that the error is only in the order of 10⁻³mm even if the sampling distance of g measurements is 4 km. As a component of the error sources of levelling, the ambiguity of the levelled height difference which is the Euclidean distance between the inclined equipotential surfaces is also investigated. Although its effect accumulated along the test line is almost zero, it reaches 0.15 mm in a 1-km-long intermediate section of the line.