辐射亮温T_(BB)在强对流天气预报中的应用

本文通过对 2 0 0 1年 4月 19日贵阳机场雷雨大风冰雹天气过程的TBB分析 ,概略地阐述TBB在贵阳机场强对流天气预报中的应用。     

三种方法测试岩溶水样氢氧同位素的对比研究

通过高温热转换元素-同位素比值质谱法（TC/EA-IRMS）、多用途气体制备仪-同位素比值质谱法（GasbenchⅡ-IRMS）以及激光光谱法对岩溶水样进行对比检测,其结果显示:对于氢同位素,TC/EA-IRMS的精密度达到0.3 ‰,激光光谱法的精密度达到0.1 ‰,均优于GasbenchⅡ-IRMS的精密度1.4 ‰;对于氧同位素,GasbenchⅡ-IRMS的精密度达到0.02 ‰,激光光谱法的精密度达到0.04 ‰,优于TC/EA-IRMS的精密度0.16 ‰。使用激光光谱法测定岩溶水样的氢氧同位素,所需要的样品量少,精密度高,能够满足岩溶区样品的高精度测试要求。      

基于场所的GIS中的不确定性问题及分类框架

基于场所的GIS直接表达人类地理空间知识的管理和加工过程,而不确定性是人类智能的基本特点,因此GIS的智能化需要研究其中的不确定性问题。与传统的GIS相比,基于场所的GIS中的不确定性问题更为丰富,既包括随机性,也包括含糊性,而不确定性的主体既可以是地理要素、场所和空间关系,也包括命题和规则。该文介绍该领域相关的研究成果,基于不确定性主体、类型、表达手段及相关的活动4个视角,建立了基于场所的GIS中所涉及的不确定性框架,从而为相关的不确定性建模提供指导。     

工程物探方法在探测坝体隐患中的应用

针对锦西化工集团皂化渣场存在的防渗大坝渗水现象,采用综合物探方法对坝体进行渗漏检测.检测工作选择充电法、高密度电阻率法和浅震反射波法,准确地圈定了坝体内部的渗漏部位.经防漏施工后有效地制止了坝体渗漏.由此证实工程物探方法是一种经济、高效的坝体渗漏检测手段.     

空间数据访问中间件技术

空间数据共享和互操作是GIS领域迫切需要解决的重要问题,文中基于OGC规范,探讨了空间数据访问中间件的实现策略,并给出相应的实现模型,屏蔽多源空间数据的异构性和复杂性,实现分布式异构环境下的共享和互操作。     

辐射亮温TBB在强对流天气预报中的应用

本文通过对2001年4月19日贵阳机场雷雨大风雹天气过程的TBB分析，概略地阐述TBB在贵阳机场强对流天气预报中的应用。     

综合物探方法在确定矿山采空区中的应用

矿山地区地表起伏大,利用传统的勘探方法确定地下采空区将耗费大量的人力和物力,采用综合物探方法、手段会起到事半功倍的效果。本文介绍了在鞍山矿区利用地质雷达法、瞬变电磁法、浅震反射波法、瞬态瑞雷波法来确定地下采空区。以便减少它们造成的地质灾害。     

GIS网络分析的动态分段方法与实现

动态分段技术是GIS网络分析中的一种重要的技术手段，它可以有效解决基于线性特征的动态分析问题。该文探讨了动态分段技术的基本原理和思想，并提出一套基于链—动态结点模型的动态分段模型及其实现方法。该模型结构简单，容易实现，并在实际应用中取得了良好的实用效果。     

STATISTICAL ANALYSIS OF SUMMER TROPICAL CYCLONE REMOTE PRECIPITATION EVENTS IN EAST ASIA FROM 2000 TO 2009 AND NUMERICAL SIMULATION

Using 1°×1° final analysis(FNL) data from the National Centers for Environmental Prediction(NCEP),precipitation data from the Tropical Rainfall Measuring Mission(TRMM) and the best-track tropical cyclone(TC)dataset provided by the Japan Meteorological Agency(JMA) for June-August of 2000-2009, we comprehensively consider the two factors low-level moisture channel and interaction between TCs and mid-latitude systems and implement a statistical analysis of remote precipitation in East Asia to the north of 0° and to the west of 150° E. 48 cases of remote precipitation occurred in this period, which are categorized into five classes. After a composite analysis of the different classes, the main systems at 850 h Pa and 500 h Pa that impact the remote precipitation are as follows:TC, mid-latitude trough, subtropical high and water vapor channel. In particular, the water vapor channel which usually connects with Indian monsoon has the most significant impact on remote heavy rainfall. Another important factor is the mid-latitude trough. The type of north trough/vortex-south TC remote precipitation events happen most frequently,accounting for 68.8% of the total incidence. Most remote precipitation events occur on the right side of the TC path(representing 71% of the total number). At 200 h Pa, the remote precipitation events usually occur on the right rear portion of a high-altitude jet stream, and there is an anti-cyclonic vortex to the east and west of the TCs. When there is no anti-cyclonic vortex to the east of the TC, the TC is relatively weak. When the remote precipitation occurs to the northwest of the TC and there is a trough in the northwest direction, the TC is relatively strong. Numerical experiments are carried out using Weather Research and Forecast(WRF) model. The results shows that the TC plays a main role in producing the heavy precipitation and results in the enhancement of precipitation by impacting the water vapor channel.