基于激光跟踪仪的三维控制网测量精度分析

介绍三维控制网的优点及激光跟踪仪测量系统的特点,讨论了光束法平差原理及不同观测值的权比问题,并以100MeV电子直线加速器安装测量控制网的模拟计算和实测结果,论证了利用激光跟踪仪进行三维控制网的精度。     

具有匹配不确定的奇异摄动系统的鲁棒控制

对于同时具有结构匹配不确定和系统不确定量的奇异摄动系统,利用Lyapunov稳定性理论进行了鲁棒性研究。给出了1个理想奇异摄动系统的稳定鲁棒控制也是不确定奇异摄动系统稳定控制的稳定条件和鲁棒界,讨论了鲁棒界及其随参数变化的变化范围。本文是王宪杰,高存臣已有结果的推广。     

综合一致性质量控制方法及其在气温中的应用

由于历史逐日气温资料在气候分析、气候变化研究中的基础性作用,其数据质量状况日益受到关注。利用邻近参考站日平均气温、最高气温和最低气温资料及线性回归模型,设计了基于线性回归数据估计方法的质量检查算法,该算法同时包含了时间一致性和空间一致性两种检查方法。通过数据植入误差检测以及与单一空间回归检查方法的比较,该算法的错误数据检测性能较高,可检测出与正确日气温数据相差3℃左右的可疑值。在该算法的基础上,研制了综合一致性数据质量控制方法,该方法具有以下特点:第一类错误发生率较低;保持了时间、内部和空间一致性的逻辑关系;参考了天气因素。因此,与一般的数据质量控制方法相比,综合一致性数据质量控制方法具有较高的错误数据检测性能。经过在华中区域湖北、湖南和河南三省251个站1961—2009年逐日气温资料的应用,取得了较好效果。各要素奇异值检出率平均气温为0.001%,最高气温为0.05%,最低气温为0.04%。     

专用方位控制网形变检测方案的设计

为检测专用方位控制网是否发生了明显变形 ,本文作者提出了方位边夹角灵敏度的概念 ,并推导了相应的公式。     

江西地热控制因素研究

江西地热资源为赋存于断裂裂隙中的水热对流型地热水,这一特性决定了地热水的形成与分布与断裂构造有着密不可分的联系。现出露的地热,其形成与分布受断裂构造、水文地质、地形地貌、以及岩性等因素的控制。这些控制因素可以为地热勘查与开发,尤其是寻找隐伏地热指明方向,即在地热研究中应综合考虑地热异常、断裂构造及组合、水文地质及岩性等控制地热水形成与分布因素的共同作用。     

Excel97在多目标地球化学调查分析质量管理中的应用

采用中文版Excel97设计和实现了多目标地球化学调查样品分析质量管理。该系统只要建立好相应的分析数据库，就可自动获得分析报告、报出率、内检样检查、标样检查、标样监控图等监控数据。     

黄土基底构筑物边坡稳定的研究方法

我国适合露天开采的煤田,主要分布在西部及西北部的黄土高原地区。黄土基底构筑物在加载过程中,曾出现过某些惨痛的工程教训。基于黄土基底排土场形成后黄土底工程性质演化规律及失稳机制分析,提出其边坡稳定的研究方法,对黄土高原地区煤炭资源开发建设具有重要的理论与实际意义。     

Incremental Growth of Plains-Type (Compactional) Folds in a Cratonic Environment as Revealed by the Sedimentary Sequence

The enigma of the origin and development of plains-type folds, as they were christened in the early 20th Century, essentially has been solved. The folds, a considerable distance from the tectonic disturbance, were formed by draping of sediments over differentially displaced Precambrian basement fault blocks. These Precambrian basement fault blocks controlled the location, size, and shape of the folds. Forces were transmitted through the rigid basement causing readjustment along the indigenous fracture/fault pattern formed much earlier. In the U.S. Midcontinent, the crystalline basement is overlain by a thin veneer of sediments, and once the structures were formed, they continued to develop as evidenced by features in the overlying sediments. As the stress was transmitted through the basement and then relaxed, the fault blocks moved differentially in concert to these outside forces. Sediment compaction and nondeposition over structural topographic highs reacted accordingly to form the features as seen today. To determine the structural history, structural closure on different horizons on the anticline is plotted in their appropriate stratigraphic position at depth. This gives a compaction line for each tectonically coherent segment. Similar segments show a relatively straightline with offsets at major unconformities indicating breaks in the continuum. It is at these breaks that the section can be stretched until the compaction line matches as a continuum with the resulting gap giving the approximate amount of missing section for that part of the rock column. Conversely, the amount of closure on a structure at depth for each line segment can be estimated by extrapolating downward in that segment. This technique to determine depth of burial and thus the amount of missing stratigraphic section from well data at numerous locations has been compared with estimates made by other methods and the results are similar. Where no other data are available or for quick estimates, then, it is proposed that this approach will give reasonable results and that the values can be used as a constraint in basin modeling.     

ARGO剖面浮标数据质量控制过程剖析

ARGO计划的观测目标是能取得精度分别为0．5℃和0．01PSU的海水温度和盐度资料。然而,由于目前海水盐度是采用海水电导率间接导出的,而测量海水电导率的传感器很容易产生偏差。因此,必须对获得的ARGO数据进行质量控制。文章详细介绍了ARGO剖面浮标资料实时质量控制模式和延时质量控制模式及其采用的质量控制方法等。     

3S技术在黑龙江省防汛指挥系统中的应用

文章简要介绍了黑龙江省防汛指挥系统建设的目标 ,论述了 3S技术是该系统应用的关键技术 ,以及展现了 3S技术在该系统应用的发展趋势。