ANALYSIS ON SPATIAL FEATURES OF LUCC BASED ON REMOTE SENSING AND GIS IN CHINA   总被引：2，自引：0，他引：2  

GAOZhi－qiang DENGXiang－zheng 《中国地理科学(英文版)》2002,12(2):107-113

In view of the large quantities of areas,complex landform and dynamic change of resources and environ-ment in China,China has already funded abundantly a series of macro remote sensing investigation projects in land use cover change(LUCC) since 1990.Supported by the achievements of such projects,Chinese resources,environmental and remote sensing database(CRERS) was created.In this paper,we standardized the LUCC dataset of CRERS at scale of 1km,which facilitated the study of spatial features of LUCC in China.The analysis on the spatial features of LUCC and their causes of formation in China are based on the CRERS supported by the technologies of Geographic Information System(GIS) .The whole research was based on the grade index of land use,ecological environmental index and index of population density.Based on the correlation analysis,we found that the special features of LUCC were closely related with those of ecological environment and population density,which resulted form that areas with better ecological environ-ment and high production potential of land were easy and convenient for human being to live,which,furthermore,led to the aggravation of excessive exploitation of land resources there.  相似文献   

A Correlation between Proton Events and Hα Flares and its Possible Interpretation     

Kim Jik Su  Yuan-Yong Deng  Kim Kum Sok  Kim Jin Song National Astronomical Observatories  Chinese Academy of Sciences  Beijing Pyongyang Astronomical Observatory  Academy of Sciences  DPR of Korea 《中国天文和天体物理学报》2001,(6)

1 INTRoDUCTIONIt is well known that solar proton flares are maiuly correlated with strong, bright H. flares,in particular, with two ribbon flares. Ellison et al. (l961) were the first to draw attelltion tothe faCt that all cosndc-ray flares had the typical two-ribbon shape. Then, Svestka and Simon(1976) drew uP the "Catalog of Solar Particle Evellts, 195ty1969", and using this Catalog,Dodson and Hedeman could safely identify the flare sources for 50 proton events. Out of the 50idellti…  相似文献   

The Thermodynamic and Dynamical Features of Double Front Structures During 21-31 July 1998 in China   总被引：3，自引：0，他引：3  

ZHOU Yushu  DENG Guo  LEI Ting  JU Jianhua 《大气科学进展》2005,22(6):924-935

1. IntroductionDuring June and July, from the mid-lower reachesof the Yangtze River basin in China to southern Japan,a precipitation zone with intensive torrential rain ap-pears and lasts for two to three weeks. This phe-nomenon is called the "mei-yu" in …  相似文献   

植被温度条件指数在土壤墒情遥感监测中的应用   总被引：2，自引：0，他引：2  

陈怀亮  邹春辉  邓伟  祝新建 《气象科技》2005,(Z1)

利用多年极轨气象卫星遥感资料,在计算出植被条件指数和温度条件指数的基础上,计算了遥感监测土壤墒情的植被温度条件指数(TV)。通过实测土壤湿度和TV的散点图,可以得到土壤墒情遥感模型的干旱等级指标,可用于干旱等级定性监测;通过建立土壤湿度和TV的回归方程,可进行土壤墒情定量监测。该方法兼有植被条件指数和温度条件指数的优点,且计算简单,对地面气象要素依赖性小,实时性好,在作物生长旺盛期,其定量反演0~30 cm土壤墒情精度平均可达80%以上,可以替代作物缺水指数法。  相似文献   

抚顺市煤矸石对生态环境的影响及综合利用   总被引：4，自引：0，他引：4  

王长明邓军  张进德 《中国煤田地质》2005,17(1):32-35

抚顺市煤田开采悠久，煤矸石的堆积量大，对生态环境的影响显著，并且占用大量土地，严重污染环境，以及出现边坡失稳现象。本文详细地分析了煤矸石对生态环境的影响，阐述了目前煤矸石资源化的综合利用情况，以及开发利用煤矸石具有环保和经济双重意义。  相似文献   

Temperature dependence of magnetic susceptibility in an argon environment: implications for pedogenesis of Chinese loess/palaeosols   总被引：15，自引：0，他引：15  

Qingsong Liu  Chenglong Deng  Yongjae Yu  José Torrent  Michael J. Jackson  Subir K. Banerjee  Rixiang Zhu 《Geophysical Journal International》2005,161(1):102-112

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Space/Time Features of the Secular Variation in 1951–1998 Northern 500-hPa Height     

Neng Shin  Ziwang Deng 《Meteorology and Atmospheric Physics》2000,73(1-2):35-46

Summary  This paper presents a trend coefficient as a characteristic index with which to investigate the 1951–1998 secular trend variation (STV) of northern 500-hPa height on a seasonal basis. Evidence suggests that low (high) latitude 500 hPa geopotential height displays a remarkably positive (negative) trend; the positive anomaly of the height is maintained over NW Africa, the western Mediterranean Sea and North Africa, mid-Pacific at lower latitudes, Lake Baikal and area to the east and NW North America; the height drops significantly over the Aleutians and North Pacific, the area to the south of the Greenland and NE North America and the sector to the north of the Arabian Sea. Further, analysis of abrupt change shows that the 500-hPa circulations experience noticeable sudden change twice, once around the early 1960s and again in 1976, during which period the height exhibits great differences between the Pacific and Atlantic. In the first period it drops (rises) over the mid-Atlantic at lower latitudes (NW Africa); in the second period the height rises (drops) over the mid-Pacific at lower latitudes and Lake Baikal (the North Pacific). Statistical tests indicate that in the 1976 case the low-latitude positive abrupt change is even more noticeable compared to the negative of the North Pacific, thus representing a large-scale jumping event of the northern 500-hPa height. Received April 9, 1999/Revised October 15, 1999  相似文献   

不同土壤水分和不同覆盖条件下麦田水分动态和增产机理研究   总被引：6，自引：1，他引：5       下载免费PDF全文

朱自玺  赵国强  方文松  邓天宏  付详军 《应用气象学报》2000,(Z1)

1997年 1月至 1 998年 6月在郑州水分试验场进行了小麦田覆盖期、覆盖量和土壤水分处理试验 .结果表明 ,覆盖是一种行之有效的保墒增产措施 .不同覆盖期、不同覆盖量和不同土壤水分对小麦干物重、叶面积、蒸腾强度、产量和水分利用效率有着显著的影响 .覆盖期、覆盖量和土壤水分含量的最佳结合点为 :冬前小麦停止生长之日、55%～ 70 %土壤相对湿度、450 0～ 60 0 0 kg/ hm2覆盖量 .在此状况下 ,产量可增加 1 8.5% ,水分利用效率提高 2 2 .1 % .  相似文献   

红外遥感用于地震预测及其物理机理研究   总被引：15，自引：0，他引：15  

尹京苑  房宗绯  钱家栋  邓明德  耿乃光  郝晋升  王众  籍全权 《中国地震》2000,16(2):140-148

在等温过程加载的条件下,实验得出岩石的红外辐射能量随压力变化显著变化的结果。这个变化与温度无关,完全由压力引起,这就证明了机械能能直接激发岩石分子振动态能级之间的跃迁,不需要经夺石生预测地震奠定了理论基础,这一物理现象的发现,为用红外遥感观测地球表层应力场分布和预测地震奠定了理论基础,提供了实验依据。提出了由温度异常引起的红外辐射能量变化和由应力起的红外辐射能量变化以及将两者分离出发的理论与方法,  相似文献   

亚硝酸根的动力学分析法进展   总被引：4，自引：0，他引：4  

朱庆仁  孙登明 《岩矿测试》2000,19(3):199-204

评述了动力学分析法测定亚硝酸根的发展状况,包括指示反应、线性范围、检测限和分析方法的应用,引用参考文献８１篇。  相似文献