奥运会开幕式天气形势分析

通过对奥运会开幕式天气形势进行分析,对2008年8月8日的天气形势有了比较深入的了解。8月8日华北地区较长时间处在副高外围,比较深的层次为西南气流控制,有利于中低层的暖湿空气向北京地区输送;副热带高压东退北抬,有利于副高西北部的冷空气分裂东移南压;850hPa从等高线气旋式弯曲逐渐形成明显的切变;北京地区处在地面高压后,北京西南部处在地面倒槽内;大气层结经历了一个由不稳定到稳定,稳定到不稳定的变化过程,特别是从20:00到23:00大气层结变的很不稳定,非常有利于对流天气的产生;8日14:00后副高有一个明显东退现象,相应的副高西北部冷空气一股一股东移南下,在卫星云图上表现为西北部的冷锋云系和西-西南的850hPa切变线云系;经过人工干预作业后西北部的云系向东偏北移动,西-西南的云系减弱后南压消散,北京国家体育场未受降水影响。     

奥运会开幕式人工干预天气后大气可降水量的变化分析

利用北京地区219个自动站探测资料,计算2008年8月8日北京地区逐5分钟的大气可降水量,结合常规观测资料、卫星云图资料进行分析,并与8月9日进行对比。结果表明,受8月8日人工作业影响,在大规模作业区的下风方一个带状范围内,大气可降水量随时间变化具有明显的突变(大气可降水量突然减小,持续时间大致在20分钟左右),在带状范围外则没有这种现象,就像一个比较干燥的大气柱从西南向东北方向移动。8月9日未进行人工干预,降水带的下风方没有出现这种现象。     

内蒙古自治区化学级用硅企业防雷检测要点

文章重点分析化学级用硅企业防雷减灾工作,以及指出了建（构）筑物设备和人员的防雷安全工作的着重点,从而达到企业的综合防雷保护,减少雷电灾害安全隐患。     

3D GIS技术研究发展综述

回顾了3DGIS的发展进程,从三维空间数据获取,三维数据模型,三维空间数据管理和分析以及三维可视化技术4个方面综述了3DGIS技术的发展。探讨了目前研究3DGIS的4个热点问题:①数据源集成快速获取数据的方法;②不同数据模型的集成;③支持空间分析的面向对象的数据模型;④城市三维模型。     

CVE导航与空间感知研究综述

协同虚拟环境(CVE,Collaborative Virtual Environment)系统已经在科学可视化、协同设计、战争模拟等很多领域得到了广泛应用.文中论述了CVE导航的特点以及空间感知的重要性,并对目前该领域研究的前沿问题以及可开展的工作进行了阐述.     

Geochemistry and chronology of the Jiehekou Group metamorphic basic volcanic rocks in the Lüliang Mountain area,Shanxi, China

Samples were systematically collected from metamorphic basic volcanic rocks in the Jiehekou and Xiyupi areas on both sides of the Lüliang Mountains, Shanxi Province and analyzed for their major elements, trace elements and rare earth elements (REE). The geochemical characteristics of their major, trace and rare-earth elements indicated that the metamorphic basic volcanic rocks in this area were emplaced in the tectonic environment like a modern continental rift. Sm-Nd and Rb-Sr isotope chronological studies demonstrated that the Jiehekou Group metamorphic basic volcanic rocks were formed during the 2600-Ma crust/mantle differentiation event, and were transformed by granulite facies metamorphism during the late Neo-Archaean period (2500 Ma ±), making the Sm-Nd systematics of the rocks reset. During the late Paleoproterozoic period (1800 Ma ±) the Rb-Sr systematics of the rocks were disturbed again in response to the Lüliang movement. Since the extent of disturbance was so weak that the Sm-Nd systematics was not affected, the age of 1600 Ma ± obtained from this area seems to be related to local magmatic activities within the craton. Research results lend no support to the idea that the Lüliang Group was formed during the Archaean. Instead, it should be formed during the Proterozoic.     

区域地球化学不均一性起因初探——以吕梁-中条古元古代裂谷带为例

研究表明，现代地慢的化学和同位素具有明显的横向及纵向不均一性，且这种不均一性在太古宙就已存在；目前，对于地球化学不均一性起因的争论仍然非常激烈，为此本选定华北克拉通中部的吕梁—中条裂谷带进行深入探讨。该裂谷带形成于古元古代，尽管其中的岩石建造生成于相同的大地构造背景，经历了相同的构造、热事件的改造，但在不同空间位置上，其岩石建造从老到新存在系统的地球化学特征的差异，说明这种地球化学差异性应是对源区地球化学特征的继承，后期的改造并没有对其进行明显的改造，更进一步说明区域地球化学不均一性是对源区不均一性的继承，区域地球化学不均一性起源于初始不均一性。从而表明后期的地质过程对岩石化学组成的影响与其初始组成对其控制作用相比，明显处于次要地位。     

Geochemistry and chronology of Se＇ ertengshan greenstone, Inner Mongolia

This paper deals with the meta-mafic volcanic rocks of the Gongyiming iron deposit at Baotou, Inner Mongolia. The major and trace elements and REE data indicate that the meta-mafic volcanic rocks occurred in the environment similar to a modern continental rift. Sm-Nd and Rb-Sr isotopic studies indicated that the meta-basic rocks were formed during the Early Neoarchean from 2800 Ma to 2900 Ma and reworked during the Late Neoarchean (2500 Ma) by metamorphism. Because of the separation of the North China Craton from the Siberia Craton during the Middle Proterozoic (1600 Ma), the Rb-Sr systematics of the rocks has been changed. The Se‘ ertengshan greenstone seems to occur during the Middle Archean. A stable continental crust may have existed during the Paleoarchean.     

基于COM结构的军事标图组件的设计与实现

针对当前军事标图软件在灵活性和可移植性等方面的缺陷，文中以组件式软件设计思想为指导，设计并实现了军事标图组件ComPlot，并通过应用实例验证了该组件的各项功能。