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THE REMOTE SENSING IN COAL GEOLOGY——A study on detection of coal spontanous burning by remote sensing in the coal fields in the north of China
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作者 Guan Haiyan(China Coal Remote Sensing Geology Centre) 《遥感信息》 CSCD 1990年第A02期3-4,共2页
The spontaneous burning has been lasting for thousands of years in the coal fields in the north of China. It spreads from the west (Tianshan coal field) to the east (Huolinhe coal field). Its E-W extension is up to 37... The spontaneous burning has been lasting for thousands of years in the coal fields in the north of China. It spreads from the west (Tianshan coal field) to the east (Huolinhe coal field). Its E-W extension is up to 3750km, concentrating in N35°toN45°, its vertical depth up to 260m, and the surface temprature locally up to 270℃. Annually, it burns out 0, 250-300 million tones of coal, causing economic loss equivalent to 2-3 billion R.M.B. Yuan.It destroies coal resources and causes hazards in coal mines. In order to locate the extent and the direction in coal burning areas, the remote sensing technique has heen used and has produced an obvious benefit. 展开更多
关键词 the remote sensing in COAL GEOLOGY A study on detection of coal spontanous burning by remote sensing in the coal fields in the north of China
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Theory of Geological Anomaly in Remote Sensing 被引量:3
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作者 Chen Jianping Zhao Pengda Ding Huoping The Institute of High and New Techniques Applied to Land Resources, China University of Geosciences, Beijing 100083 《Journal of China University of Geosciences》 SCIE CSCD 2001年第2期108-112,共5页
Geological anomaly is geological body or complex body with obviously different compositions, structures or orders of genesis as compared with those in the surrounding areas. Geological anomaly, restrained by the geolo... Geological anomaly is geological body or complex body with obviously different compositions, structures or orders of genesis as compared with those in the surrounding areas. Geological anomaly, restrained by the geological factors closely associated with ore forming process, is an important clue to ore deposits. The geological anomaly serves as a geological sign to locate ore deposits. Therefore, it is very important to study how to define the characteristics of geological anomaly and further to locate the changes in these characteristics. In this paper, the authors propose the geological anomaly based on the remote sensing images and data, and expound systematically such image features as scale, size, boundary, morphology and genesis of geological anomalies. Then the authors introduce the categorization of the geological anomalies according to their geneses. The image characteristics of some types of geological anomalies, such as the underground geological anomaly, are also explained in detail. Based on the remote sensing interpretation of these geological anomalies, the authors conclude that the forecasting and exploration of ore deposits should be focused on the following three aspects: (1) the analysis of geological setting and geological anomaly; (2) the analysis of circular geological anomaly, and (3) the comprehensive forecasting of ore deposits and the research into multi source information. 展开更多
关键词 geological anomaly remote sensing geology geological field.
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An applied research on remote sensing classification in the Loess Plateau 被引量:5
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作者 LIU Yongmei TANG Guoan +1 位作者 LI Tianwen YANG Qinke 《Journal of Geographical Sciences》 SCIE CSCD 2003年第4期395-399,共5页
Dae to complex terrain of the Loess Plateau, the classification accuracy is unsatisfactory when a single supervised classification is used in die remote sensing investigation of the sloping field. Taking the loess hil... Dae to complex terrain of the Loess Plateau, the classification accuracy is unsatisfactory when a single supervised classification is used in die remote sensing investigation of the sloping field. Taking the loess hill and gully area of northern Shaanxi Province as a test area, a research was conducted to extract sloping field and other land use categories by applying an integrated classification. Based on an integration of supervised classification aad unsupervised classification, sampling method is remarkably unproved. The results show that the classification accuracy is satisfactory by the method and is of critical significance in obtaining up-to-date information of the sloping field, which should be helpful in the state key project of converting farmland to forest and grassland on slope land in this area. This research sought to improve the application accuracy of image classification in complex terrain areas. 展开更多
关键词 remote sensing integrated classification loess hilly and gully area sloping field SHAANXI
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Separate Analysis of Remote Sensing Information of Structures of Different Geological Periods and Quantitative Study of Corresponding Tectonic Stress Fields 被引量:1
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作者 Yang Wunian and Zhu Zhangsen Institute of Remote Sensing and GIS, Chengdu University of Technology,Chengdu, Sichuan Liu Xinzhu Yang Wencai 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 1997年第3期344-354,共11页
The structural feature shown on a remote sensing image is a synthetic result ofcombination of the deformations produced during the entire geological history of an area.Therefore, the respective tectonic stress field o... The structural feature shown on a remote sensing image is a synthetic result ofcombination of the deformations produced during the entire geological history of an area.Therefore, the respective tectonic stress field of each of the different stages in the complexdeformation of an area can be reconstructed in three steps: (1) geological structures formed atdifferent times are distinguished in remote sensing image interpretation; (2) structuraldeformation fields at different stages are determined by analyzing relationships betweenmicrostructures (joints and fractures) and the related structures (folds and faults); and (3)tectonic stress fields at different stages are respectively recovered through a study of the featuresof structural deformation fields in different periods. Circular structures and related circlular and radial joints are correlated in space to con-cealed structural rises. The authors propose a new method for establishing a natural model ofthe concealed structural rises and calculating the tectonic stress field by using quantitative dataof the remote sensing information of circular structures and related linear structures. 展开更多
关键词 separate analysis of the remote sensing information field circular structure linear structure stress field quantitative analysis 3—dimensional colour structural block diagram
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Gravity and magnetic field characteristics and regional ore prospecting of the Yili ancient continent, West Tianshan, Xinjiang Uygur Autonomous Region, China 被引量:2
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作者 Xue-zhong Yu Yi-yuan He +3 位作者 Meng Wang Jian Zhang Xuan-jie Zhang Zheng-guo Fan 《China Geology》 2020年第1期104-112,共9页
Gold,iron,copper,lead-zinc and other mineral exploration in West Tianshan,Xinjiang Uygur Autonomous Region,has made remarkable progress in recent years.However,due to the dispute on the tectonic division of West Tians... Gold,iron,copper,lead-zinc and other mineral exploration in West Tianshan,Xinjiang Uygur Autonomous Region,has made remarkable progress in recent years.However,due to the dispute on the tectonic division of West Tianshan,the ore-controlling factors and the regional metallogenic laws are controversial.The authors analyze regional gravity data and notice that the high-value region corresponds to the Yili ancient continent,thus the southeastern boundary of the Yili ancient continent is delineated.Comparative analysis of gravity,aeromagnetic and geologic data reveals that the Tulasu basin,where some medium to large epithermal gold deposits locate,lies above the Yili ancient continent;the Yili Carboniferous-Permian rift extends in E-W direction,numbers of copper deposits have been found in the mid-west section of the rift which lies above the Yili ancient continent,whereas few copper deposits have been discovered in the east section which is outside the Yili ancient continent.Accordingly,the Yili ancient continent may be rich in gold,copper and other metal elements;the metal-bearing hydrothermal solution moves up with the activity of magmatism,and deposits in the favorable places(the Tulasu basin and the Yili Carboniferous-Permian rift),forming numerous small and medium gold,copper deposits,as well as some large and super-large gold deposits.Therefore,the tectonic-magmatic hydrothermal zone above the Yili ancient continent should be the prospective area for epithermal gold and copper polymetallic deposits. 展开更多
关键词 Yili ancient continent Yili Carboniferous-Permian rift Gravity field Epithermal gold deposit Copper polymetallic deposit Geophysical and remote sensing survey engineering Xinjiang Uygur Autonomous Region China
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High-resolution remote sensing image-based extensive deformation-induced landslide displacement field monitoring method 被引量:16
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作者 Shanjun Liu Han Wang +1 位作者 Jianwei Huang Lixin Wu 《International Journal of Coal Science & Technology》 EI 2015年第3期170-177,共8页
Landslide is one of the multitudinous serious geological hazards. The key to its control and reduction lies on dynamic monitoring and early warning. The article points out the insufficiency of traditional measuring me... Landslide is one of the multitudinous serious geological hazards. The key to its control and reduction lies on dynamic monitoring and early warning. The article points out the insufficiency of traditional measuring means applied for large-scale landslide monitoring and proposes the method for extensive landslide displacement field monitoring using high- resolution remote images. Matching of cognominal points is realized by using the invariant features of SIFT algorithm in image translation, rotation, zooming, and affine transformation, and through recognition and comparison of characteristics of high-resolution images in different landsliding periods. Following that, landslide displacement vector field can be made known by measuring the distances and directions between cognominal points. As evidenced by field application of the method for landslide monitoring at West Open Mine in Fushun city of China, the method has the attraction of being able to make areal measurement through satellite observation and capable of obtaining at the same time the information of large- area intensive displacement field, for facilitating automatic delimitation of extent of landslide displacement vector field and sliding mass. This can serve as a basis for making analysis of laws governing occurrence of landslide and adoption of countermeasures. 展开更多
关键词 Landslide monitoring High-resolution remote sensing SIFT algorithm Deformation field
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Soil Erosion Changes over the Past Five Decades in the Red Soil Region of Southern China 被引量:18
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作者 LIANG Yin LI Decheng +5 位作者 LU Xixi YANG Xuan PAN Xianzhang MU Huan SHI Deming ZHANG Bin 《Journal of Mountain Science》 SCIE CSCD 2010年第1期92-99,共8页
This paper reports the dynamic changes of soil and water loss in the red soil region of Southern China since the 1950s. The red soil region covers eight provinces: Jiangxi, Zhejiang, Fujian, Anhui, Hubei, Hunan, Guang... This paper reports the dynamic changes of soil and water loss in the red soil region of Southern China since the 1950s. The red soil region covers eight provinces: Jiangxi, Zhejiang, Fujian, Anhui, Hubei, Hunan, Guangdong and Hainan. From the 1950s to 1986, the annual rate of soil erosion increased by 3.4%. From 1986 to 1996 and from 1996 to 2000, the annual rates of soil erosion decreased by 2.0% and 0.32%, respectively. Field surveys showed that from 2000 to 2005, the area of soil and water loss decreased annually by 1.2%. This decrease was a result of large-scale erosion control activities across China. Although the eroded soil has been restored, the restoration process is very slow and full restoration will take a long time. Our report suggests that controlling soil and water loss is a challenging task, and additional measures must be taken to effectively control the soil erosion in the red soil region. 展开更多
关键词 red soil region soil and water loss dynamic change remote sensing field samplingsurvey
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A new algorithm based on the background field for red tide monitoring in the East China Sea 被引量:3
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作者 XU Xiaohui PAN Delu +1 位作者 MAO Zhihua TAO Bangyi 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2014年第5期62-71,共10页
Remote sensing has been proven to be an effective means of monitoring red tides. The spectral information is an important basis for establishing a model to monitor red tides. The spectral curves of red tide events are... Remote sensing has been proven to be an effective means of monitoring red tides. The spectral information is an important basis for establishing a model to monitor red tides. The spectral curves of red tide events are analyzed and compared with multiyear monthly averaged spectral curves based on MODIS data from July 2002 to June 2012, as well as spectral differences at the same location during red tide presence and absence. A red tide monitoring algorithm is developed based on the background field to extract the red tide information of the East China Sea (ECS). With the application of the algorithm in the ECS, the results reveal that the developed model can effectively determine the location of red tides, with good correspondence to the results from an official bulletin. This demonstrates that the algorithm can effectively extract the red tide information. 展开更多
关键词 red tide remote sensing background field East China Sea
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A Remote Sensing Image Semantic Segmentation Method by Combining Deformable Convolution with Conditional Random Fields 被引量:12
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作者 Zongcheng ZUO Wen ZHANG Dongying ZHANG 《Journal of Geodesy and Geoinformation Science》 2020年第3期39-49,共11页
Currently,deep convolutional neural networks have made great progress in the field of semantic segmentation.Because of the fixed convolution kernel geometry,standard convolution neural networks have been limited the a... Currently,deep convolutional neural networks have made great progress in the field of semantic segmentation.Because of the fixed convolution kernel geometry,standard convolution neural networks have been limited the ability to simulate geometric transformations.Therefore,a deformable convolution is introduced to enhance the adaptability of convolutional networks to spatial transformation.Considering that the deep convolutional neural networks cannot adequately segment the local objects at the output layer due to using the pooling layers in neural network architecture.To overcome this shortcoming,the rough prediction segmentation results of the neural network output layer will be processed by fully connected conditional random fields to improve the ability of image segmentation.The proposed method can easily be trained by end-to-end using standard backpropagation algorithms.Finally,the proposed method is tested on the ISPRS dataset.The results show that the proposed method can effectively overcome the influence of the complex structure of the segmentation object and obtain state-of-the-art accuracy on the ISPRS Vaihingen 2D semantic labeling dataset. 展开更多
关键词 high-resolution remote sensing image semantic segmentation deformable convolution network conditions random fields
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Understanding the drivers of woody plant diversity in urban parks in a snow climate city of China
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作者 Zijun Ma Peng Zhang +6 位作者 Nanlin Hu Guodong Wang Yulin Dong Yujie Guo Chengcong Wang Yao Fu Zhibin Ren 《Journal of Forestry Research》 SCIE CAS CSCD 2023年第4期1021-1032,共12页
Urban parks are an important part of urban ecosystems and play an important role in biodiversity conservation.However,it is still unclear how park characteristics aff ect plant diversity which could hinder the conserv... Urban parks are an important part of urban ecosystems and play an important role in biodiversity conservation.However,it is still unclear how park characteristics aff ect plant diversity which could hinder the conservation of urban biodiversity due to the ineff ective design of urban parks.The diversity of woody plants in 33 parks of Changchun,China,was measured with plot measurements and linked with urban park characteristics(e.g.,size and age of the park)to uncover the relationship between them.The results show that urban woody plant species were abundant,with 98 species belonging to 51 genera and 26 families in the snow climate city of Changchun.The variation in woody plant diversity was largely explained by internal patch characteristics(e.g.,size,age,shape),and external factors surrounding the park(e.g.,land use type and socioeconomic level)accounted for only 16.0%in our study.For internal patch characteristics,older urban parks with larger areas demonstrated a richer level of plant diversity and increased nonlinearly with increasing park area.The threshold size signifi cantly aff ecting plant diversity variation was approximately 30 ha.Plant diversity had positive linear relationships with the ages of urban parks,supporting the legacy eff ect.In addition,woody plant diversity nonlinearly decreased with increasing park shape index,which suggested that the plant diversity could also be increased by optimizing the park shape.Regarding the external factors surrounding parks,the spatial distribution of woody plant diversity varied greatly from the urban center to the suburbs.House prices around the park had positive linear relationships with woody plant diversity in parks,supporting the luxury eff ect.However,building and road proportions,and green space proportion had no relationship with plant diversity in parks.This study can provide a robust reference for enriching plant diversity in urban parks,thus improving the development of urban sustainable cities. 展开更多
关键词 Urban ecosystem Urban biodiversity Urban park remote sensing field measurement
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Improved strategy for estimating stem volume and forest biomass using moderate resolution remote sensing data and GIS 被引量:10
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作者 Arief Wijaya Sandi Kusnadi +1 位作者 Richard Gloaguen Hermann Heilmeier 《Journal of Forestry Research》 SCIE CAS CSCD 2010年第1期1-12,I0001,共13页
This study presents the utility of remote sensing (RS), GIS and field observation data to estimate above ground biomass (AGB) and stem volume over tropical forest environment. Application of those data for the mod... This study presents the utility of remote sensing (RS), GIS and field observation data to estimate above ground biomass (AGB) and stem volume over tropical forest environment. Application of those data for the modeling of forest properties is site specific and highly uncertain, thus further study is encouraged. In this study we used 1460 sampling plots collected in 16 transects measuring tree diameter (DBH) and other forest properties which were useful for the biomass assessment. The study was carded out in tropical forest region in East Kalimantan, Indo- nesia. The AGB density was estimated applying an existing DBH - biomass equation. The estimate was superimposed over the modified GIS map of the study area, and the biomass density of each land cover was calculated. The RS approach was performed using a subset of sample data to develop the AGB and stem volume linear equation models. Pearson correlation statistics test was conducted using ETM bands reflectance, vegetation indices, image transform layers, Principal Component Analysis (PCA) bands, Tasseled Cap (TC), Grey Level Co-Occurrence Matrix (GLCM) texture features and DEM data as the predictors. Two linear models were generated from the significant RS data. To analyze total biomass and stem volume of each land cover, Landsat ETM images from 2000 and 2003 were preprocessed, classified using maximum likelihood method, and filtered with the majority analysis. We found 158±16 m^3.ha^-1 of stem volume and 168±15 t.ha^-1 of AGB estimated from RS approach, whereas the field measurement and GIS estimated 157±92 m^3.ha^-1 and 167±94 t.ha^-1 of stem volume and AGB, respectively. The dynamics of biomass abundance from 2000 to 2003 were assessed from multi temporal ETM data and we found a slightly declining trend of total biomass over these periods. Remote sensing approach estimated lower biomass abundance than did the GIS and field measurement data. The earlier approach predicted 10.5 Gt and 10.3 Gt of total biomasses in 2000 and 2003, while the later estimated 11.9 Gt and 11.6 Gt of total biomasses, respectively. We found that GLCM mean texture features showed markedly strong correlations with stem volume and biomass. 展开更多
关键词 above ground biomass stem volume remote sensing GIS field observation data
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Redevelopment of Daqing Oil Field distributed earthquake disaster reduction system skeleton 被引量:1
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作者 金波 陶夏新 +1 位作者 谢礼立 毛建猛 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2008年第6期884-888,共5页
Through investigation on the international development trend of earthquake disaster reduction system(EDRS)researches,a well finished Daqing Oilfield EDRS is introduced.Based on the PC System,redevelopment of the EDRS ... Through investigation on the international development trend of earthquake disaster reduction system(EDRS)researches,a well finished Daqing Oilfield EDRS is introduced.Based on the PC System,redevelopment of the EDRS skeleton is well discussed,including the technical skeleton,function composition,structures of software and hardware,redevelopment languages,database,and remote linking and calling of analysis modules.Meanwhile,it is pointed out that extending and utilizing the function of remote sensing information on the basis of the current distributed EDRS skeleton will become another study direction of EDRS. 展开更多
关键词 Daqing Oil field distributed earthquake disaster reduction REDEVELOPMENT remote sensing
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Prospecting for coal in China with remote sensing 被引量:1
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作者 TAN Ke-long WAN Yu-qing +2 位作者 SUN Sun-xin BAO Gui-bao KUANG Jing-shui 《Journal of China University of Mining and Technology》 EI 2008年第4期537-545,550,共10页
With the rapid development of China's economy, coal resources are increasingly in great demand. As a result, the remaining coal reserves diminish gradually with large-scale exploitation of coal resources. Easily-foun... With the rapid development of China's economy, coal resources are increasingly in great demand. As a result, the remaining coal reserves diminish gradually with large-scale exploitation of coal resources. Easily-found mines which used to be identified from outcrops or were buried under shallow overburden are decreasing, especially in the prosperous eastern regions of China, which experience coal shortages. Currently the main targets of coal prospecting are concealed and unidentified underground coal bodies, making it more and more difficult for coal prospecting. It is therefore important to explore coal prospecting by taking advantage of modern remote sensing and geographic information system technologies. Given a theoretical basis for coal prospecting by remote sensing, we demonstrate the methodologies and existing problems systematically by summarizing past practices of coal prospecting with remote sensing. We propose a new theory of coal prospecting with remote sensing. In uncovered areas, coal resources can be prospected for by direct interpretation. In coal beating strata of developed areas covered by thin Quaternary strata or vegetation, prospecting for coal can be carried out by indirect interpretation of geomorphology and vegetation. For deeply buried underground deposits, coal prospecting can rely on tectonic structures, interpretation and analysis of new tectonic clues and regularity of coal formation and preservation controlled by tectonic structures. By applying newly hyper-spectral, multi-polarization, multi-angle, multi-temporal and multi-resolution remote sensing data and carrying out integrated analysis of geographic attributes, ground attributes, geophysical exploration results, geochemical exploration results, geological drilling results and remote sensing data by GIS tools, coal geology resources and mineralogical regularities can be explored and coal resource information can be acquired with some confidence. 展开更多
关键词 remote sensing coal prospecting coal field prediction coal prospecting for deeply buried coal seams
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Small-scale area survey and analysis of Xinjiang's coal field fire in China
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作者 Zhong Maohua Fu Tairan Hu Zhongbin 《Engineering Sciences》 EI 2008年第3期57-63,共7页
In this paper, Xinjiang's coal field is selected as the investigation area. Through a series of field surveys in Xinjiang, we made the small-scale area analysis of coal field fire using the ground remote sensing tech... In this paper, Xinjiang's coal field is selected as the investigation area. Through a series of field surveys in Xinjiang, we made the small-scale area analysis of coal field fire using the ground remote sensing technique, and presented the reasonable evaluation of thermal anomaly conditions of Xinjiang's coal field arising from coal self-ignition fires. The results show that the method of small-scale area analysis is available for examining the extinguished actuality of coal fires and detecting fire spots. Therefore, for the selected fire-extlngulshed coal field in Xinjiang, the fire extinguishing effect was effectively analyzed by the means, and the new hidden thermal dangers were sought and diagnosed. For the coal field where the fire has not been extinguished, the utilization of this means approximately identified the severity and range of the fire area, and provided the quantitative and ground references for extinguish engineering. 展开更多
关键词 coal field fire thermal anomaly remote sensing SMALL-SCALE
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Trace element geochemical characteristics of plants and their influence on the remote-sensing spectral properties in the North Jiangsu oil field 被引量:1
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作者 WANG YunpengGuangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China 《Chinese Science Bulletin》 SCIE EI CAS 2000年第S1期26-34,共9页
This paper presents the contents of 17 kinds of trace elements in plant leaf samples collected from 4 sections in the North Jiangsu oil field, and the dada on their visible-near infrared spectra. By comparing the resu... This paper presents the contents of 17 kinds of trace elements in plant leaf samples collected from 4 sections in the North Jiangsu oil field, and the dada on their visible-near infrared spectra. By comparing the results of the inner and outer oil-gas remote-sensing anomaly areas, the plant trace element composition, and the enrichment characteristics and their influence on the plant spectral properties are described. The results indicated that the plant leaves had very strong enrichment ability toward some elements such as Mg, Ca, K, Na, Fe, Al, Mn, V, Zn and Cr. The plant leaves from the oil-gas abnormal areas were enriched in trace elements of the Fe-series, but depleted in alkali and alkali-earth metal elements. The plant trace elements had a strong influence on the 'blue-shift' strength and the reflectance of visible bands. And the ratios between Fe, Co and K, Na, Cd, Cu, Ba are the effective remote-sensing oil-indicating factors of plant trace elements. plant trace element, geochemistry, remote 展开更多
关键词 plant TRACE element GEOCHEMISTRY remote sensing spectra NORTH Jiangsu oil fleld.
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Simulation of leaf area index and biomass at landscape scale 被引量:7
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作者 ZHANGNa YUGuirui +1 位作者 YUZhenliang ZHAOShidong 《Journal of Geographical Sciences》 SCIE CSCD 2003年第2期139-152,共14页
The method for simulating the temporal and spatial distribution patterns of leaf area index (LAI) and biomass at landscape scale using remote sensing images and surface data was discussed in this paper. The procedure... The method for simulating the temporal and spatial distribution patterns of leaf area index (LAI) and biomass at landscape scale using remote sensing images and surface data was discussed in this paper. The procedure was: (1) annual maximum normalized difference vegetation index (NDVI) over the landscape was calculated from TM images; (2) the relationship model between NDVI and LAI was built and annual maximum LAI over the landscape was simulated; (3) the relationship models between LAI and biomass were built and annual branch, stem, root and maximum leaf biomass over the landscape were simulated; (4) spatial distribution patterns of leaf biomass and LAI in different periods all the year round were obtained. The simulation was based on spatial analysis module GRID in ArcInfo software. The method is also a kind of scaling method from patch scale to landscape scale. A case study of Changbai Mountain Nature Reserve was dissertated. Analysis and primary validation were carried out to the simulated LAI and biomass for the major vegetation types in the Changbai Mountain in 1995. 展开更多
关键词 landscape scale leaf area index BIOMASS remote sensing field measurement CLC number:Q948.2 TP79
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基于Sentinel-2数据提取江汉平原虾稻田分布方法
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作者 王静 万君 邓环环 《湖北农业科学》 2024年第8期194-200,208,共8页
以江汉平原为研究区,基于AI Earth阿里云平台提供的Sentinel-2 MSI L2数据,在实地采样样本和目视解译样本的基础上,通过分析遥感影像中虾稻田的时序变化规律,总结出区分虾稻田与其他地物类型的关键时间以及指数阈值,从而构建虾稻田提取... 以江汉平原为研究区,基于AI Earth阿里云平台提供的Sentinel-2 MSI L2数据,在实地采样样本和目视解译样本的基础上,通过分析遥感影像中虾稻田的时序变化规律,总结出区分虾稻田与其他地物类型的关键时间以及指数阈值,从而构建虾稻田提取的决策树模型,最终提取出江汉平原2022—2023年虾稻田的空间分布。最后,基于样本数据评估了该方法的精度,总体精度达93.25%,Kappa系数为0.8429,结果表明该方法具有较好的提取结果。 展开更多
关键词 多时相遥感影像 Sentinel-2 虾稻田 决策树 江汉平原
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面向新时代地方高校师范生培养的“遥感概论”教学内容与方法创新
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作者 戚鹏程 赵菲菲 +3 位作者 鲁丰先 张淼 张杰云 崔艳 《南阳师范学院学报》 CAS 2025年第1期78-82,共5页
面向新时代背景下高素质专业化中学地理教师的培养需求,探讨了地理科学专业“遥感概论”课程的教学内容与方法创新。抽样调查了当前国内地理科学专业“遥感概论”课程的开设情况。从对中学地理教学的支持、师范生的学习困难和课程思政... 面向新时代背景下高素质专业化中学地理教师的培养需求,探讨了地理科学专业“遥感概论”课程的教学内容与方法创新。抽样调查了当前国内地理科学专业“遥感概论”课程的开设情况。从对中学地理教学的支持、师范生的学习困难和课程思政三个方面分析了开展教学创新的必要性。针对课程存在的问题,提出了一系列创新策略,包括重构课程目标和内容以加强对中学地理教学的支撑,采用直观教学法以提升教学效率以及课程思政的科学建设与合理融入等。 展开更多
关键词 地理科学专业 师范生培养 “遥感概论”
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Monitoring earthquake precursor field of NW Yunnan by stress remote sensing
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作者 游永雄 王荣敏 +2 位作者 李爱军 樊昌尧 戎志国 《Science China Earth Sciences》 SCIE EI CAS 2000年第6期661-669,共9页
The orbit perturbation of meteorologic satellite is used for the inversion of stress drop dynamic field of regional crustal structure. Rapid scanning over vast area is carried out to obtain short term earthquake-gener... The orbit perturbation of meteorologic satellite is used for the inversion of stress drop dynamic field of regional crustal structure. Rapid scanning over vast area is carried out to obtain short term earthquake-generating precursor field of seismic source and near-source districts in order to predict the three earthquake elements: epicenter, magnitude and commencement time of earthquake with the same effect as weather forecast. Taking the strong earthquakes that occurred in recent years in the NW of Yunnan as examples, direct deduction has been made for Lijiang and Wuding earthquakes, and curves of dynamic characteristics of stress drop before and after earthquakes as well as abnormal fluctuations of precursor stress drop and commencement time of earthquake have been plotted. 展开更多
关键词 STRESS remote sensing MONITORinG over the EARTHQUAKE precursor field tectonic STRESS field area of Lijiang and Wuding of NW Yunnan.
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利用多时相Sentinel-1 SAR数据反演农田地表土壤水分 被引量:38
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作者 何连 秦其明 +3 位作者 任华忠 都骏 孟晋杰 杜宸 《农业工程学报》 EI CAS CSCD 北大核心 2016年第3期142-148,共7页
土壤水分是陆面生态系统水分和能量循环的重要变量,在农田干旱监测、作物长势监测和作物估产等应用研究中具有重要的作用。该文结合基于变化检测的Alpha近似模型,利用Sentinel-1卫星获取的多时相C波段合成孔径雷达(synthetic aperture r... 土壤水分是陆面生态系统水分和能量循环的重要变量,在农田干旱监测、作物长势监测和作物估产等应用研究中具有重要的作用。该文结合基于变化检测的Alpha近似模型,利用Sentinel-1卫星获取的多时相C波段合成孔径雷达(synthetic aperture radar,SAR)数据,实现了农田地表土壤水分的反演。该文首先利用微波辐射传输模型验证了Alpha近似模型在土壤水分反演中的合理性。研究发现,对于土壤散射占主导的区域,Alpha近似模型对辐射传输模型有较好的近似,能够有效地消除地表粗糙度和植被对雷达后向散射系数的影响。在此基础上,结合怀来研究区多时相Sentinel-1 SAR数据,利用Alpha近似模型构建了土壤水分观测方程组,通过求解方程组得到了农田地表土壤水分。地面验证结果表明,土壤水分反演的均方根误差(root mean square error,RMSE)为0.06 cm3/cm3,平均偏差为0.01 cm3/cm3,精度较好。该文研究为利用高重访周期、多时相的Sentinel-1 SAR数据获取农田地表土壤水分提供了参考。 展开更多
关键词 土壤水分 遥感 合成孔径雷达 反演 多时相 农田地表
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