冀东地区油气微渗漏地植物的遥感基础研究

本文通过已知含油区及背景区地植物及地表土壤多种微量金属元素和吸附烃的综合分析,并利用遥感资料与物探资料作复合评价,讨论了冀东油气微渗漏地区的遥感植物地球化学标志。     

激光荧光雷达系统的测量方法与应用

本文叙述了应用激光荧光雷达系统测量海上溢油类别以及植被、岩矿、土壤、地被物等荧光光谱的方法与技术。该装置由N_2激光源、OSA光学光谱分析仪、卡斯格伦望远镜接收系统三部分组成。该装置可在室内,也可在室外25—60m远处测量各种物质的受激发射荧光。该仪器用标准灯谱进行了校正。     

植物在不同形态和不同状态下的荧光光谱特征研究

本文从光合作用的角度出发,讨论了植物叶片在不同形态、不同状态下的荧光光谱特征以及它们对荧光光谱的影响。文章涉及了以下几方面的内容:(1)植物在离体形态和活体形态下的荧光光谱特征;(2)叶片正面与反面的荧光光谱特征;(3)植物不同器官对荧光光谱的影响;(4)叶片放置时间对荧光光谱的影响;(5)叶片经不同处理时对荧光光谱的影响等。其目的是为激光荧光技术用于植被遥感的实施提供基础数据。     

激光荧光遥感系统在地物识别上的应用研究

应用我国自行研制组装的激光荧光遥感系统,测试了包括岩石、土壤、植物、水体以及人工建筑材料在内的各种样品的激光诱导荧光光谱。研究结果表明,应用地物荧光峰的位置、强度及它们的组合指标,不仅能区分上述各基本类型的地物,而且还能往下级单元续分。还表明,激光荧光遥感系统具有相当广泛的应用前景,在某些方面可望超过当前常用的、以反射光谱为基础的被动式遥感。     

VARIATIONS IN THE TELECONNECTION INTENSITY INDICES AND THEIR REMOTE RESPONSE TO THE EL NINO EVENTS IN THE NORTHERN HEMISPHERE*

In this study,the monthly and seasonal teleconnection intensity indices of the Pacific/North American(PNA),Western Atlantic(WA),Western Pacific(WP),Eastern Atlantic(EA) and Eurasian(EU) patterns for the period from 1951 through 1990 are calculated.On this basis,their climatic variations and the relationship between the five teleconnection intensity indices and the El Nino events are examined.It is noted that when El Nino is at its mature stage(winter),the weak WP pattern is mainly characteristic of the circulation and the strong PNA pattern is the next.In summer when El Nino occurs and develops,the strong EU,weak WP and weak WA patterns are the main characteristics without the PNA circulation anomalies.Finally,by the nonlinear mapping method a nonlinear mapping diagram is established for diagnosing El Nino using three summer teleeonuection intensity indices and May and August Southern Oscillation Indices(SOIs).Thus,the El Nino phenomenon occurring in 1991 is diagnosed.Besides,the winter atmospheric circulation of the 1991/1992 El Nino is found to be the weak WP pattern and the PNA pattern is also weak.     

震兆图象的远程遥联性

通过研究我国一些震情窗口成组震兆与大陆及边邻Ms≥7.0级地震的整体链式活动的对应关系,指出这些窗口的成组震兆具有远程遥联的特点。对这种特点的深入研究将有可能为我国大陆及边邻地区地震活动的总体大形势作出估计。     

Remote Sensing Study of Gold Biogeochemical Effects in the Western Guangdong-Hainan Region——A Case Study of the Hetai Gold Deposit

The vegetation has been poisoned by gold in the western Guangdong-Hainan region. The gold content ofthe leaves there is as high as 10-1961 times the abundance, the chlorophyll content is 10%-30% lower thanthat of the vegetation in metamorphic terrains and 10%-20% higher than that in granite terrains, and thecarotenoid content is 10%-44% lower than the background value. The water content of leaves is 10% to 20%lower than the background value. The cells of leaves are deformed and broken. The leaf surface shows colourspots and becomes yellow or dark green. The spectral reflectance of the leaf surface is 5%-30% higher than thebackground value: the spectral shape has shifted 5-15 nm to the short wavelength. The gray scales of eanopyon images of Landsat TM and airborne imaging scanner (AIS) are 10%-100% higher than the backgroundvalues. On Landsat TM and AIS false colour images, plants poisoned by gold display a yellow color, whichdisinguishes them from background plants. According to the spectral and image features of goldbiogeochemical effects, the author has constructed a gold information system and expert prediction system,and thus two gold target areas and two gold prospect areas have been identified rapidly, economically andaccurately in the western Guangdong-Hainan region which is extensively covered by vegetation.     

适用于遥感领域的交互式图像处理系统

数字图像处理技术的广泛应用使很多与图像相关的领域产生了根本性的变革。反过来，这些变革也对数字图像处理提出更高的要求，而计算机和人工智能技术的迅速发展为建立新的、面向具体应用的图像处理系统提供了现实的可能性。本文展示了一个基于Ｕｎｉｘ工作站的、适用于遥感领域的交互式图像系统的设计框架和主要功能。