WGMD—1型高密度电阻率测量系统比值参数软件的开发与应用

高密度电阻率法测量中的比值视参数是近几年发展起来的高密度电阻率处理与解释参数,它们具有更好的横向、纵向分辨率以及抑制干扰等作用,介绍了适合于ＷＧＭＤ－１型高密度电阻率法测量系统的幽会参数软件的编制及其在工程勘测中的应用实例,实践证明,这是一组质量高,误差小,方便实用的组合参数,可广泛的用于工程勘测中。     

城市遥感与城市信息系统

2 0世纪 ,航空摄影测量与航空遥感在我国城市化进程与城市规划、管理中作出了重要的贡献。 2 1世纪卫星遥感可能越来越发挥广泛的作用。本文回顾了近 2 0年来 ,我国开拓城市遥感与城市地理信息系统的新进展 ,指出高分辩率卫星图像数据与三维航空遥感越来越接近城市快速发展的要求 ,为城市信息系统的建设与更新 ,提供了空前有利的条件。     

钢管高强混凝土压弯构件滞回性能的研究

本文根据适用于三向周期受力的钢材本构关系模型,和适用于三向周期受力改进的混凝土本构关系的边界面模型,采用有限元法对钢管高强混凝土压弯构件的荷载－位移滞回曲线进行了理论分析,并进行了6个核心混凝土的强度为77N/mm2的钢管高强混凝土压弯构件滞回性能的试验研究。将理论分析和本试验研究及其他试验研究结果进行了对比,分析了荷载－位移滞回曲线的特点。     

一种新型的建筑物修复或抗震加固方法

叙述了采用高强度纤维／环氧树脂复合材料对建筑物进行修复或抗震加固方法的特点、施工方法,实例表明该方法有广泛的应用前景,指出,该方法对保证人民财产安全及搞好防震减灾工作有积极作用。     

板栗状石英晶簇的发现及其形成条件分析

在上水桥金、萤石矿区的含矿硅化破碎带中,新发现一种围绕断层磨砾呈放射状生长的石英晶簇,因其像有刺、有壳、有仁的板栗,作者将其命名为板栗状石英晶簇。板栗状石英晶簇可能是硅质围绕悬浮于高比重热液中的断层磨砾生长形成,反映当时热液中可能含有高浓度的重金属化合物。     

Characteristics of paleoproterozoic Subduction System in Western Margin of Yangtze Plate

INTRODUCTIONDebate centered on Proterozoic tectonic style and crustalevolution has existed for a long time.The customary viewbelieved that the Proterozoic undeveloped solid plate could notput into effect on the subduction because of the high heat flowin the earth,and the continental crustal growth was dominatedby mafic magm a vertical underplating (Wyborn,1988;Etheridge etal.,1987) .However,many observations recentlyobtained from Proterozoic mobile zones in the world suggeststhat Proter…     

叶片化学组分成像光谱遥感探测机理分析

利用地面光谱仪的测量数据 ,进行了成像光谱遥感探测叶片化学组分的机理性研究。采用多元逐步回归方法 ,分析了鲜叶片 7种化学组分含量与其光谱特性的统计关系 ,分别建立了反射率 ρ及其变化式 1/ρ、logρ和ρ的一阶导数Kρ 与化学组分含量的统计方程 ,并对这 4个指标的性能进行了比较和评价。结果表明 ,在 95 %的置信水平下 ,可以由叶片的精细光谱特征较好地反映出化学组分含量 ;特别是利用Kρ 作为因子 ,使置信水平提高到 99% ,尤以对粗蛋白质、N、K含量反映最好 ,R2 均达到 0 8以上 ,粗蛋白质可达 0 95 6 4,从而为进一步探讨在中国利用成像光谱遥感探测叶片化学组分奠定了基础     

Determination of High Field Strength Elements, Rb, Sr, Mo, Sb, Cs, Tl and Bi at ng g−1 Levels in Geological Reference Materials by Magnetic Sector ICP-MS after HF/HClO4 High Pressure Digestion

Six low abundance rock reference materials (basalt BIR-1, dunite DTS-1, dolerite DNC-1, peridotite PCC-1, serpentine UB-N and basalt TAFAHI) have been analysed for high field strength elements (Zr, Nb, Hf, Ta, Th and U), Rb, Sr, Mo, Sb, Cs, Tl and Bi at ng g⁻¹ levels (in rock) by magnetic sector inductively coupled plasma-mass spectrometry after HF/HClO₄ high pressure decomposition. The adopted method uses only indium as an internal standard. Detection limits were found to be in the range of 0.08 to 16.2 pg ml⁻¹ in solution (equivalent to 0.08 to 16.2 ng g⁻¹ in rock). Our data for high field strength elements, Rb, Sr, Mo, Sb, Cs, Tl and Bi for the six selected low abundance geological reference materials show general agreement with previously published data. Our Ta values in DTS-1 and PCC-1 (1.3 and 0.5 ng g⁻¹) are lower than in previously published studies, providing smooth primitive mantle distribution patterns. Lower values were also found for Tl in BIR-1, DTS-1 and PCC-1 (2, 0.4 and 0.8 ng g⁻¹). Compared with quadrupole ICP-MS studies, the proposed magnetic sector ICP-MS method can generally provide better detection limits, so that the measurement of high field strength elements, Rb, Sr, Mo, Sb, Cs, Tl and Bi at ng g⁻¹ levels can be achieved without pre-concentration, ion exchange separation or other specialised techniques.     

干旱区陆面过程野外观测研究

主要论述了陆-气相互作用研究在干旱区人类生存环境与发展区域经济中的重要意义。同时,介绍了观测场地以及野外观测情况。最后,对干旱区腾格里沙漠宁夏沙坡头无灌溉的植物固沙区、青海海北高寒草甸区和新疆塔里木盆地灌溉的绿洲农田的陆-气水热交换过程观测结果进行了讨论。并且,研究了干旱区不同下垫面的陆-气相互作用规律,可为研究局地生态环境、指导生产实践提供科学依据。     

应用高精度卫星图像进行城市植被覆盖调查:以厦门市为例

With the technological improvements of satellite sensors, we will acquire more informationabout the earth so that we have reached a new application epoch of observation on earthenvironmental change and cartography. But with the enhancement of spatial resolution, somequestions have arisen in the application of using traditional image processing and classificationmethods. Aiming for such questions, we studied the application of IKONOS very high resolutionimage (1 m) in Xiamen City on Urban Vegetation Cover Investigation and discussed the differencebetween the very high resolution image and traditional low spatial resolution image at classification,information abstraction etc. It is an advantageous test for the large-scale application of very highresolution data in the future.