最新刊期
卷 ， 期 2 ， 1988
- 摘要：This paper deals with some problems existed currently in the conventional numerical classification of soil types and the automatic recognition of remotely sensed image. We propose a soil fuzzy-clustering method which is ancillarily performed by geographic and geological data. In this paper, a concept of soil-genesis is first in troduced quantitatively in soil numerical classification and image recognition, endowing the effect of soil-forming factors on the classified results with a new meaning. Thus it combines the correlative geoscientific analysis with automatic recognition and classification, and can be used to solve the problem of spectral confusion in automatic classification. Therefore, it is a development in improving the accuracy of category.
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发布时间：2021-06-10 - 摘要：The key of studying the historic change of salinized, aeolian sandy and waterlogged soils by using the aerophotos tanken at different times is as follows: （1） selecting the aerophotos tanken at the best time, （2） adopting a uniforme soil classification system and mapping units and （3） a transference method with high accuracy. Aerophotos tanken at different times can be used for studying not only the change of area of the salinized soil, aeolian sandy and waterlogged soil, but also the factors which cause these changes, all these are a base for determining some proper methods for ameliorating the soils.
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发布时间：2021-06-10 - 摘要：An extraction of model parameters is the key for remote sensing application in the calculation and forecast of flood, which mainly depends on relationships between characteristic informations of a basin obtained by remote sensing data and characteristics of model parameters. There are close relations between the flood stochastic model-rgeomorphoclimatic instantaneous unit hydrograph （Rodriguez-Iturbe, et al., 1979.） and the characteristics of a basin. The model is deduced through Marcov process of raindrops uniformly distributed over the river ordering system of a basin, which is advanced by R. E. Horton and is defined by A. N. Strahler. At this basis, we take Jieting basin of Puyong river in Zhejiang Province for the experimental area of the model. According to the map of river ordering system of a basin, which is interpresed from LANDSAT MSS image we extracted the geomorphic parameters of the model and calculated the processes of five floods in the basin. And the results indicated that the calculative precisions of the model can meet the requiements of flood calculation.
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发布时间：2021-06-10 - 摘要：In this paper, the methods of extracting nformation on snow cover, altitude of snow line and snow melt, snow classification and mapping are studied with satellite remote sensing images and diggital data through optical interpretation and digital processing. Meanwhile, corresponding methods are appraised. The separability between snow and clouds are analysed using different data and processing methods.
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发布时间：2021-06-10 - 摘要：The paper is focused on the physical basis on the employment of aerial thermal infrared imaging to the investigation into water pullution of the Huangpu River, the Signiture of water pollution on the thermal infrared image and its interpretation. The discussion is made on the situation of sewage discharge along the River and its diffusion law at different tidal levels. The extent of the River’s pullution can be seen clearly on the image.
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发布时间：2021-06-10 - 摘要：The eddy information is retrieved in the open sea out of the estuary of the Yellow River using ratioes of satellite CCT data from various bands, futhermore, the mechanism of eddy formation is investigated based on the theory of Helmholtz, and then the sea area congruent with floating mud is interpreted in the paper. Because wind and wave lifts float rnud in it, sea looks muddy and it’s specific gravity and viscous force is enlarged, thus improving the wave damping effect. This fact anchorage sheltered from wind for ship is enclosed and demonstrated by an actual case.关键词：ratio image;eddy information;wave damping effect;floating mud
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发布时间：2021-06-10 - 摘要：This paper presents an achievement about a study of metamorphosed sedimentary iron deposits using Landsat-3 MSS CCT in the north of Shanxi province.The remote sensing information concerning metamorphosed sedimentary iron deposits are enhanced by using digital image processing techenique, they as statistical variable are opplied to metallogenic prognosis. The results of the calculation indicates some favourable sectors of the area for geological exploration, and shows a good prospect of iron ore resources. Furthermore author uses the model of "Logical Information processing" to study the remote sensing variables, a correlative relationship is shown clearly between the variables and metamorphosed sedimentary iron deposits.
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发布时间：2021-06-10 - 摘要：On the basis of laboratory measured results, dielectric properties of various types of minerals and rocks were summarized in this paper. At microwave band the difference in ε’ of minerals may be as great as two orders of magnitude and ε", 4 orders of magnitude. At low frequency the difference is more obvious. Sulfides show most remarkable variations in ε’ and ε", followed by oxides. In igneous rocks, either intrusive or extrusive, ε’ and ε" tend to decrease gradually from ulurabasic-basic to intermediate-acidic rocks. Variations in ε’ and ε" of metamorphic and sedimentary rocks are more complicated then those of igneous rocks.Experiments have shown that the structure water in a mineral there is little effect on its dielectric constant. The correlation between ε’ and absorbed water is represented by ε’ = ε0’pεwisw. Differences in ion type, ion radius, ion polarizability may cause regular variations in ε’ and ε". Crystal structure orieutation, coordinate-number of atoms, bond type, density, metamorphic degree, and geological occurrence of a mineral also have great influence on its dielectric properties.Application of dielectric constants to microwave remote sensing were analized. There exists an evident correlativity between the brightness temperature of objects and the greyscale value of the SIR-A image and the complex dielectric constants of rocks or sails （real part ε’ and imaginary ε"）.关键词：介电常数;介电损耗;矿物;岩石;微波遥感
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发布时间：2021-06-10 - 摘要：This paper described a digital convolution enhancement procedure for interactive extraction of linear features from remote sensing image. It consists six steps: （1） Preprocessing the image. （2） Directional convolution filling for edge enhancement. （3） Smoothing and noise reduction. （4） Interactive extraction of linear features. （5） Producing a all direction lineament map. （6） Overlapping the lineaments onto the original image. Those images obtained using this procedure provide useful tools for further analysis and geologic interpretation of the lineaments.The lineaments extrated from MSS image in Mongshan region of Shantong province and in Tongling area of Anhuei province are taken for two examples to illustrate the effect of this method.
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发布时间：2021-06-10 - 摘要：Texture is one of the most important characteristics for the substance recognition both in visual perception and computer image analysis. Many texture models have been used. But whether the model is appropriate in mathematics has not been studied before. In this paper, a test of hypothesis which examines the autoregressive texture model in introduced. The test of hypothesis is also used in looking for a more appropriate autoregressive texture model.In this paper, the autocorrelation method is also suggested to reduce the computational workload.关键词：模式识别;纹理分类;特征抽取
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发布时间：2021-06-10 - 摘要：<正> 地质矿产部物探局和水文司于1984年组织地质遥感中心、水文方法队、江苏地质矿产局、浙江地质矿产局和上海经济区地质中心开展了上海经济区遥感综合调查。这次调查取得的五项成果,为上海经济区环境综合治理工程规划、重点工程选址及海岸滩涂资源开发利用,提供了基础资料。
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发布时间：2021-06-10
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