新书介绍     

史培军宫鹏李晓兵等著的《土地利用/覆盖变化研究的方法与实践》由科学出版社年月出版。书中介绍了该领域的研究进展区域土地利用/覆盖测量技术体系基于NOAA/AVHRR数据的中国植被分类及其变化的区域分异规律  并结合实践  对区域土地利用/覆盖变化过程进行了模拟  分析了其对环境与灾害的影响机制。　　刘会远郑天祥韩彪等著的《澳门与中国的对外开放》由河海大学出版社年月出版。全书在经济全球化大趋势背景下分析澳门作为窗口和桥头堡的功能  并分析了澳门与珠海的经济合作及与珠江-南昆线经济带发展的联系 《地理学报》2001,56(1):53

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THE USE OF A RATIO METHOD AS AN ALTERNATIVE TO CONSTRAINED DECONVOLUTION     

PAUL BENJAMIN CRIEEY The University of Tennessee Knoxville  Department of Electrical  Computer Engineering  Ferris Hall  Knoxville  TN -  U.S.A. 《地理学报(英文版)》1991,(2)

This paper will consider the use of an iterative ratio technique called Gold's ratio method as an alternativeto iterative constrained deconvolution methods for the restoration of overlapped and noisychromatograpic peaks.The study will consist of first describing the technique and then evaluating itsperformance with respect to Jansson's deconvolution procedure.A Hewlett-Packard 5890A gaschromatograph will be used to generate most of the test data.The evaluation criteria will includeconvergence rates,peak area errors and variances,retention time variances and noise performance.  相似文献   

《地震地质》征订启事          下载免费PDF全文

《地震地质》于年创刊.本刊的顺利出版发行  得益于国内外广大订户读者的关心和大力支持  编辑部深表谢意!　　本刊由北京报刊发行局向全国发行  邮发代号:-.需要本刊的读者  可通过当地邮局订阅.如果需要以前的期刊  请汇款至编辑部 《地震地质》2001,23(4):555

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STEP-POOL MORPHOLOGY IN HIGH-GRADIENT STREAMS   总被引：3，自引：0，他引：3  

A.R. MAXWELL  A.N. PAPANICOLAOU Research Assistant  Dept. of Civil  Envir. Engrg.  Washington State University  Pullman  WA -  Professor  Dept. of Civil  Envir. Engrg.  Washington State University  Pullman  WA - 《国际泥沙研究》2001,16(3)

l 1NTRODUCTIONGravel bed rivers are found in man parts of the worid, mpically in moUntainous regions with highgradients and seasonally high flows. These rivers are imPotalt in contrlling flood waters from sPringrunoff in regions such as the Pacific Northwest, Where heaVy snowfall can be followed by equally heaVyranfall. The combination of high stream gradient and high discharge causes significant erosion of thebed and bank of the strCam, in some cases moving large boulders with ease.It…  相似文献   

本刊加入"万方数据-数字化期刊群”的声明     

为了实现科技期刊编辑出版发行工作的电子化  推进科技信息交流的网络化进程  我刊现已入网"万方数据-数字化期刊群”.凡向本刊投稿并录用的稿件文章  将一律由编辑部统一纳入"万方数据-数字化期刊群”  进入因特网提供信息服务.如有不同意者  请另投它刊.本刊所付稿酬亦包含刊物内容上网服务报酬  不再另付.　　"万方数据-数字化期刊群”是国家"九五”重点科技攻关项目.本刊全文内容均按照其统一格式制作.读者可上网查询浏览本刊内容  并可征订本刊. 《中国地质灾害与防治学报》2001,12(2):6

为了实现科技期刊编辑、出版、发行工作的电子化,推进科技信息交流的网络化进程,我刊现已入网"万方数据-数字化期刊群”.凡向本刊投稿并录用的稿件文章,将一律由编辑部统一纳入"万方数据-数字化期刊群”,进入因特网提供信息服务.如有不同意者,请另投它刊.本刊所付稿酬亦包含刊物内容上网服务报酬,不再另付. "万方数据-数字化期刊群”是国家"九五”重点科技攻关项目.本刊全文内容均按照其统一格式制作.读者可上网查询、浏览本刊内容,并可征订本刊. <中国地质灾害与防治学报>编辑部 2001年6月  相似文献   

NOAA卫星资料云雪识别方法的研究   总被引：3，自引：3，他引：3  

殷青军  杨英莲  徐维新 《高原气象》2002,21(5):526-528

通过分析NOAA／AVHRR资料中云和雪的光谱特征，在已有的研究成果基础上做了大量的试验分析。针对青海省南部(以下简称青南)的云、雪特征，提出了新的云、雪判别因子，对于区分青南地区的云、雪有较好的效果。  相似文献   

Growth of Emerald Crystals by Evaporation of Na2O—MoO3 Flux     

Oishi ShujiDepartment of Environmental Science  Technology  Faculty of Engineering  Shinshu University  Wakasato  Nagano -  JapanYamamoto HirofumiDepartment of Chemistry  Material Engineering  Faculty of Engineering  Shinshu University 《中国地质大学学报(英文版)》2002,13(1):35-39

Well-formed crystals of emerald, Be3AI2Si6O18:Cr, were easily grown from an Na2O-MoO3 flux by an isothermal technique. The crystal growth was conducted by heating a mixture of solute and flux at 1 100 ℃ for 24 h. The evaporation loss of flux depended on the amount of Na2O added to MoO3. Emerald crystals of lengths up to 2.1 mm and widths of 1. 4 mm were grown. The crystal sizes were dependent on the evaporation loss of the flux. The obtained crystals were transparent and exhibited the typical emerald-green color. The form of the emerald crystals was a twelve-sided prism bounded by well-developed faces. The aspect ratios were in the region of 1. 4 to 2. 3. The density was (2. 64±0.02) g/cm3. The IR absorption bands were in good agreement with the literature data.  相似文献   

Dating of the Karakorum Strike-slip Fault   总被引：6，自引：0，他引：6  

ZHOU Yong  XU Ronghu  YAN Yuehu  PAN Yusheng  Tsanyao Frank YANG  Wei LO  WU Chunming Laboratory of Lithosphere Tectonic Evolution  Institute of Geology  Geophysics  Chinese Academy of Sciences  Beijing Department of Geology  National Taiwan University  Choushan Ro  Taipei -  TaiwanDepartment of Geology  Chinese Culture University  Hwa-kang  Yang-Ming-Shan  Taipei  Taiwan Institute of Geology  Chinese Academy of Geological Sciences  Beijing 《《地质学报》英文版》2001,75(1):10-18

This paper mainly discusses the timing of the Karakorum strike-slip fault, and gives a brief introduction of its structures, offset, and deformational style. This fault strikes NNW-SSE. Asymmetrical folds, stretching lineation, S-C fabrics, feldspar and quartz σ-porphyroclasts, domino structure, shear cleavages and faults in the fault zone are products of tectonic movements. They all indicate a dextral slip sense of faulting. Mylonitic bands are widely developed along this fault. Phengite appears, indicating rather high deformational pressure. Geochronological data indicate that the Karakorum strike-slip faulting occurred from 6.88±0.36 to 8.75±0.25 Ma. The cumulative displacement from Muztag Ata to Muji is about 135 km.  相似文献   

The temporal and spatial relationship between NDVI and climatological parameters in Colorado   总被引：3，自引：1，他引：3  

GAO Zhi-qiang  Dennis O 《地理学报(英文版)》2001,11(4):411-419

1 Introduction In recent years, many researchers have demonstrated that there are essential and evident correlations between NDVI and climatological parameters (temperature and precipitation). The analysis of correlation between climate forces and time-integrated NDVI over US Northern and Central Great Plains suggested that spatial and temporal variation of precipitation and potential evapotranspiration and growing degree days in growing season are the most important control on grassland…  相似文献   

MODE-TD检验方法在上海快速更新同化业务预报系统中的初步应用     

徐同-  张蕾-  李佳- 《沙漠与绿洲气象(新疆气象)》2020,14(5):1-10

本文将时域目标检验方法(MODE-TD)初步应用于上海快速同化更新预报系统(SMS-WARRV2.0),结果表明：(1)区别于传统检验方法,引入时间维后,MODE-TD方法可以通过降水目标轨迹、生命周期、生成和消散频数、体积比、速度差和方向差等检验指标来评估高分辨率模式预报性能。(2)SMS-WARRV2.0系统能较好的模拟出2017年5月7日广州特大暴雨降水目标发生、发展和消亡的过程。(3)统计检验结果显示SMS-WARRV2.0系统能较好模拟出降水目标生成和消散个数变化趋势,配对降水目标体积比误差较小,预报目标个数偏多,预报目标生命周期偏长。  相似文献