最新刊期
      卷 ， 期 1 ， 1994
      • Issue 1, (1994) DOI: 10.11834/jrs.1994010
        摘要：This paper has presented a classification method of remotely-sensed Ima-ge data based on BP neural network,and introduced the concept of fractal dimensionwhich describes image texture suitably;The approach is also given for calculatingfractal dimension applied in image field.Finally,fractal dimension is adopted astbe additional sector of input vectors in neural network,which has greatly improvedclassification accuracy.  
        关键词：remote sensing;Fractal dimension;BP neural network   
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      • Issue 1, (1994) DOI: 10.11834/jrs.1994004
        摘要：The emphasis of this study has been put on the methods of applying re-mote sensing information for exploration of gold and other metalliferous ore depo-sits in the areas with deny vegetation coverage and complex geological structure.The extraction of thematic information of geological features is conducted in thethree aspects: stratum and rock series,structure and intersects of structural elements,and alteration zone,Finally,the geological mapping is made to delineate the mine-ralization promising areas through extraction of thematic information and integratedanalysis of image features.  
        关键词：Extraction of geological thematic information;Processing for constrai-ning vegetation information;Alteration information;Ratio analysis;Remote sensing geological mapping   
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      • Issue 1, (1994) DOI: 10.11834/jrs.1994001
        摘要：The progress and development of remote sensing technique for earthobservation in the next 10 years makes data acquisition possible to be multi-sensor,multi-resolution, multi-spectral and multi-temporal.A number of earth observationsatellite programms will provide us with huge remote sensing data with different re-solution,different spectra throughout visible, infrared,themal infrared and microwave. These data build up a pyramid of image data for the investigation of globalchange,environment rnonitoring, resource surveying and disaster prevention. It is ne-cessary to develop an automatic and intelligent remote sensing data processing systemfor earth observation from space in order to use these data quickly and successfully inreal time or on time to answer the facing problems of geo-science research and hu-man social development and to exert the potentials of remote sensing in national eco-nomy development.Facing the real situation that the satellite application does notcatch up with the satellite launch and the software development does not catch upwith the hardware updating, this paper briefly describes the necessity and possibilityfor developing an automatic and intelligent remote sensing data processing system.The main goal of this system and the key technique points to be solved are also an-alyzed in the paper.We hope our government will pay more attention and put en-ough manpower and financial support frorn related departments into this project inorder to set up and improve Chinese Geo-Science information system to a higher levelin syntheic research and effective analysis of the earth and its environment.  
        关键词：Earth observation from space;remote sensing;Geographic information system（GIS）;Automatic and intelligent data processing;Global posi-tioning system（GPS）   
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      • Issue 1, (1994) DOI: 10.11834/jrs.1994009
        摘要：This paper has demonstrated the possibility of developing algorithms toextract lineament information from Landsat TM imagery.We made use of imagesmoothing,edge tracking,Hough transformation,inverse Hough transformation etc.in automated lineament detection.After,Hough transformation,local maxima areselected in the accumulator array and after inverse,Hough transformation,the pro-file analysis for line segment identification and human-machine interactive methodsare used. Some of the rules used by geologists in their image interpretation are app-lied in automated lineament extraction from digital imagery for improving precision.  
        关键词：Lineament extraction;Edge tracking;Hough transformation;Profile analysis   
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      • Issue 1, (1994) DOI: 10.11834/jrs.1994006
        摘要：This paper presents the computer image processing method used in oil-gas resource exploration with emphasis on the method of enhancement of airbornefine-divided infrared image of oil-gas information. Main Component Transformation compresses multispectral information,it is impor-tant for the extraction of oil-gas information.On the basis of these work,a software package has been developed,which hasbeen used to process TM image and obtained satisfactory result.  
        关键词：Airborne fine-divided infrared image;Inforrnation enhancement;Main component transformation   
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      • Cheng Jiyi
        Issue 1, (1994) DOI: 10.11834/jrs.1994007
        摘要：We used radar to observe long-distance migration of brown planthopperat Jiangpu in Jiangsu Province during the second half of September,1988.Brownplanthopper dominated the night-flying aerial fauna during the period of observati-ons. Most migrant brown planthopper took off between late afternoon and dusk,cli-mbed to 400 1000m.Trajectory analysis shows that they are dispersing downwind,mainly to the southwest,where insects migrate in the north-easterly winds blowing on the east or south-east sides of a continental anticyclone.centred over northern central China. This direction is ecologically advantageous at this season because it carries the brown planthopper toward areas where survive the winter is possible  
          
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      • Issue 1, (1994) DOI: 10.11834/jrs.1994008
        摘要：Tbis paper introduces how to survey Maojiazhuang landslide and analyseit’s stability with remote sensing techniques.Maojiazhuang landslide,located in Gan-su Province,China,is an old and a very large landslide. We can find the landslideon the fracture zone by interpreting satellite image and delineate it’s extent clearlyon aerial photos.At the front of the landslide a quarry has been build.At present,there appear many active phenomena within the old landslide area. They indicate the landslide will slide down.  
        关键词：Landslide Survey;Stability Analysis of landslide;Remote sensing tech-nique   
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      • Issue 1, (1994) DOI: 10.11834/jrs.1994002
        摘要：Atmospheric effects is one of the main obstacle to the application of remote sensing.In this paper we have first analysed the various effects of atmosph-ere and illustrated its possible extent, then we have summerized, from principle and method,the classical algorithms published.From these analyses we think,to correct the effects of atmosphere,we must first acquire the condition of atmosphere quati-tatively,which is very important.For this reason,we will use NOAA on-board sounder system data named TOVS data,and aerosol model,by means of atmosphere transfer model,build up the relationship between the radiance of earth surface and the measured value of the satellite and finish the correction of atmospheric effects.In this paper,we will give the detail of ours algorithm,which is very suitable todevelope computer program used in conventional works.After finishing these work,we can correct atmosphere effects relatively easily.  
        关键词：remote sensing;atmospheric effects;TOVS data;atmosphere transfer model   
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      • Liu Yanjun
        Issue 1, (1994) DOI: 10.11834/jrs.1994005
        摘要：The high-temperature thermal abnormal areas are found on TM6 imageof Aug.28th in 1987 in the interested region of Longdong loess plateau,These ar-eas are accompanied by lowtemperature thermal abnormal areas.But on TM6 ima-ges of Sept.1987 and Aug,1986,the features of thermal infrared are in accordancewith normal thermal infrared radiation rules,there are no abnormal phenomena.To make out the causes of thermal abnormality,we find out that there happe-ned an earthquake of 5.1 magnitude in northwest of the interested region on Aug.10th in 1987 and existed oilfields and oilwells are mostly located inside low temp-erature thermal abnormal areas along the edges of the high-temperature thermal abn-ormal areas.These two factors are main causes of TM6 image abnormality of Aug,28th.The earthquake enhances the thermal radiation of geological body and leads tothe high-temperature thermal abnormality and a lot of effusion of hydrocarbon ma-terials.These bring about the reformation of related,composition and augmentationof moisture in the soil,and finally the lower abnormality in oilfield is formed.Itis evident that the lower abnormal area is one of the most important marks for pre-diction oil gas reserve.  
        关键词：thermal infrared remote sensing;Earthquake;Prediction of oil-gas reserve   
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      • Issue 1, (1994) DOI: 10.11834/jrs.1994003
        摘要：The paper discusses the abnormal biogeochemical characteristics of Mo-deposit in Lake Dinhu,the plants spectrum characteristics,mechanisms of TM imagecharacteristics,and research the biogeochemical characteristics on TM images.Establishthe theorytical basis of biogeochemical remote sensing prospect for regions coveredby plants.The results show that the gray Level on TM image in Mo deposit area are hig-her than the background level, the abnormal colour in the TM false colour compo-site image of Mo ore-field is different from background’s.The TM gray level hasa direct bearing in the spectral reflectance of the plants.The main mechanism ofTM image cbaracteristics is Mo content and chlorophyll of plants.  
        关键词：Mo-deposit;Abnormal biogeochemical characteristics;Spectrum charac-teristics;TM image   
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      • Zbong Ershun
        Issue 1, (1994) DOI: 10.11834/jrs.1994011
        摘要：Stimulated by a rapid growth of economy, geographic information systemis getting booming in China,particularly in the fields of city planning and landmanagement.Large GIS are under way in some coastal cities. While cost and benefitanalysis, an important part for both project possibility study and implementation of aGIS.has not been tackled even since in the country. This article introduces someaspects and models of cost and benefit analysis of GIS from technologic and econo-mic views,aiming at providing an impetus to study on this area in the country.Firstly,some perspectives on this question have been reviewed, then approaches ofidentifying GIS costs and benefits and some economic techniques are introduced anddiscussed in the article.  
        关键词：Geographic information system;Cost and benefit analysis   
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