工业现场近景数字摄影视觉精密测量

研究了基于近景数字摄影原理的现场三维精密视觉测量方法,对其核心技术:数字成像器件模型及标定、高精度亚像素图像处理算法以及光学编码与精密测头技术进行了深入的讨论,给出了实现思路,为工业现场近景数字摄影精密测量系统的设计提供了理论依据。     

电力系统潮流量的微机快速跟踪测量

提出了一种电力系统潮流量的快速跟踪测量方法，其响应时间只有一个采样时间间隔。实验表明，其准确度可满足实用要求。     

Motive force of Qinghai-Tibet Plateau moving to east

A calculation formula on spherical pattern of Qinghai-Tibet plateau moving model is established. Tibet massif moves norward by east in speed of 28 mm/a, Ganshu-Qinghai massif moves to northeast in speed of 15 mm/a, Qomolangma Feng moves northward by a few east in speed of 35 ～42 mm/a. The low latitude perimeter is longer than the nigh latitude perimeter. When the Tibet massif moves northward, its latitude perimeter must be contracted and the Tibet massif must move eastward by Coriolis. Coriolis force is inertial in earth rotation. It makes the fall body turning to east and the rising block turning westward. In the Northern Hemisphere, it makes the northward body turning to east and the southward block turning to west.This is the reason why the tectonic zones of western Pacific are different from those of eastern Pacific.     

烃气测量法在广西南丹县大厂镇更庄地区找矿潜力评价中的应用

广西大厂矿田为一大型-超大型锡多金属矿田。碳沥青、包裹体、矿石成分分析等方面的研究结果表明,区内成矿过程中存在大量有机质的参与,烃类气体是其重要的伴生组分。通过对土壤中的烃类组分分析发现,其背景含量与异常差异很明显,显示区内存在明显的成矿热液活动,深部有较大的找矿潜力。在总结烃类组分和微量元素As、Sb在更庄地区土壤中的异常展布特征的基础上,结合异常分布区的地质和构造条件,圈出了3个找矿有利区。     

Joint processing and analysis of seismic gravity measurements in Capital Circle area

In Capital Circle area, there are three groups of repeated gravity measurements observed by different institutes using different instruments or methods. The simultaneous adjustment of absolute and relative measurements and the elimination of systematic error among the relative measurements have been carded out in this paper. Thus an unified temporal gravity change system with absolute reference has been established. On the basis of this, the crustal subsidence effect on gravity, which belongs to non-tectonic factor, is analyzed and the station displacement corrections are carried out, so that the long-wave disturbance is eliminated. So far our following aims are realized： the advantages of the absolute and relative measurement methods are complementary to each other; the contradiction and environment disturbance are eliminated; the amounts of information are enlarged; the sampling interval of time domain is compressed. In a word, the ability of identifying the tectonic activity process is enhanced. The results show that： there are systematic errors between the two groups of relative measurements and within the data of 10 campaigns ; the uneven local crustal subsidence in the southeast of the study area results in a linear rise of gravity value at 10 stations; they can be corrected by the regression analysis. The maps of revised temporal gravity change can obviously and integrally reflect the Ms=5.0 earthquake in Guye on October 6, 1995.     

基于ASD地物光谱仪的两种天空光测量方法比较分析

基于AsD地物光谱仪最常用的两种天空光测量方法--标准灰板反演测量法和直接测量法同时观测广州市天空光辐亮度,采用灰色系统理论进行了两种测量结果的灰关联系数计算;分别对两种测量方法获取的辐亮度值进行直接比较和两种测量结果的灰关联系数定量比较分析.结果表明:标准板反演的天空光和不同方位、不同观测天顶角的天空光的灰关联系数有...     

CINRAD/SB雷达回波强度定标调校方法

回波强度定标和调校方法是保障CINRAD/SB回波强度测量精度的关键技术,方法不当会导致回波强度测量误差增大,直接影响雷达定量估测降水产品的可靠性。为了满足回波强度测量误差在±1 dBZ范围内的技术要求,根据雷达气象方程,通过对CINRAD/SB接收机测试通道、主通道、天馈系统相关影响回波强度测量误差的因素进行分析,提出了从接收机动态范围和雷达参数调整、线性通道增益定标目标常数定标,到测试通道参数调整的回波强度定标工作流程。总结出以线性通道增益定标目标常数定标为基准,采用测试通道参数测量法或基准法调校,以保证发射功率和接收机动态范围变化导致的回波强度测量误差得到在线实时校正,提高了CINRAD/SB回波强度测量精度。从接收机测试通道、主通道、天馈系统及发射功率4个方面,给出了回波异常的分析和诊断流程。并提出在接收机保护器前端增加机外信号注入口和定标信号功率检测功能,以利于机内外回波强度定标对比校准和消除测试通道参数变化导致回波强度测量误差的建议。     

论VAM的适宜时间

垂直角观测(vAM)的质量与作业时间有关.通过对大气折光角及其起伏的日变化规律的分析,提出了一种根据动态照准误差确定vAM的有利与不利时间的方法.与传统的观点相比较,采用该法确定的适宜时间将具有更高的参考价值.     

基于一类新小波函数基的GPS相位观测值周跳探测

阐述了可通过1个参数因子来调节前后差分点个数的思路,研究了利用小波分析来平滑原始资料和探测GPS相位观测值周跳的方法,并通过CHAMP卫星实测数据进行分析,得出一些有益的结论。实践表明,该方法提高了周跳探测的有效性。     

三维激光扫描技术下的规划验收测量数据处理及成果获取

三维激光扫描技术由于可快速获取高精度、高密度点云数据,可将拟验收建筑及周边情况几乎完全无差地复制到电脑中,是规划验收测量特别是复杂建筑规划验收测量的理想方法,但是其数据处理一直是影响甚至制约其应用的瓶颈。本文简述了规划验收测量要点,以及三维激光扫描点云数据初步处理流程,并针对制作规划验收测量各类图件的不同需求,提出了分别通过直接取线、切片、投影等方法制作成果图件的工作思路及各方法的特点。但是还需研究和解决海量点云的数据处理,以及根据验收测量特点获得测量成果图件的问题。