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结合光谱、纹理与形状特征的高空间分辨率遥感影像分类(英文)

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结合光谱、纹理与形状特征的高空间分辨率遥感影像分类(英文)

中国测绘学会第九次全国会员代表大会暨学会成立50周年纪念大会

作者： Yindi Zhao*a, b, Peijun Dua aSchool of Environment & Spatial Informatics, China university of mining and {2., xuzhou 2.1008, P.R. China bjiangsu key laboratory of resources and environmental information engineering, xuzhou 2.1008, P.R. China

Texture and shape analysis offer interesting possibilities to characterize the structural heterogeneity of classes in the high spatial resolution satellite imagery. In this paper, texture features are generated based on the Gaussian Markov random field (GMRF) model, and shape features are measured using geometric moments. Then feature selection is implemented according to the class separability. To reduce the border blurring effect introduced by texture features, the unsupervised classification algorithm involved ordered procedures is proposed, in which linear objects are extracted using spectral and shape features firstly, then other objects are detected using the combination of spectral, texture, and shape features. The proposed classification method is implemented using QuickBird imagery. For comparison, the standard K-means method with spectral data is used as a benchmark. The experimental results show that the ordered classification method with the combination of spectral, texture, and shape information performed better than conventional methods.

关键词： Texture feature shape feature high spatial resolution classification

Rainfall-induced landslide stability analysis in response to transient pore pressure——A case study of natural terrain landslide in Hong Kong

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Science China(Technological Sciences) 2003年第z1期46卷 52-68页

作者： LAN Hengxing, ZHOU Chenghu C. F. LeeWANG Sijing & WU Faquan State key laboratory of Natural {2. and {2. System, Institute of Geographical Sci-ences and Natural {2. Research, Chinese Academy of Sciences, Beijing 100101, China Department of Civil engineering, Hong Kong university, Hong Kong, China 3. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 10002., China Chinese Acad Sci State Key Lab Nat Resources & Environm Syst Inst Geog Sci & Nat Resources Res Beijing 100101 Peoples R China Univ Hong Kong Dept Civil Engn Hong Kong Hong Kong Peoples R China Chinese Acad Sci Inst Geol & Geophys Beijing 100029 Peoples R China

Transient pore pressure in response to short intense rainfall process plays an important role in shallow landslide occurrence. Using GIS technology, we carry out the rainfall-induced landslide stability analysis in response to transient pore pressure by means of transient and unsaturated rainfall infiltration modeling. A case study is performed on the shallow landslide stability analysis in Hong Kong. Detailed analysis and discussion reached some useful conclusions on the tempo-spatial behavior and characteristics of slope stability response and pore pressure response to typical rainfall process. Comparison analysis is performed on some important issues including landslide stability response in different types of slopes with different hydraulic properties, antecedent rainfall and landslide stability, and the nature of pore pressure response time. These studies might give us an important insight into landslide tringgering mechanism and the hydrological process in response to rainfall, and provide systematic information and evidences for effective risk assessment and warning system establishment.

关键词： rainfall-induced landslide, transient pore pressure, landslide stability in response to rainfall, GIS.

Research Advances on the Loess-Bedrock Landslide in China

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Research Advances on the Loess-Bedrock Landslide in China

2.12.Asia Pacific Conference on environmental Science and technology(APEST 2.12.

作者： Chengyi Fan1 a Shouyun Liang1 b and Xiangxian Ma2.c 1 key laboratory of Mechanics on Disaster and Environment in Western China the Ministry of Education of China and Department of Geological {2. College of Civil {2. and Mechanics Lanzhou university Lanzhou 730000 P.R.China 2.key laboratory of Petroleum resources Research Institute of Geology and Geophysics Chinese Academy of Sciences Lanzhou 730000 P.R.China

Loess landslide is one of the serious geological disasters in and around the loess plateau in northwest of *** the major type of loess landslide in this area,loess-bedrock landslide widely distributes,frequently occurs,and causes serious casualties and property *** the formation mechanism and protection countermeasures arousing increasingly,the scientists have paid close attention and got a series of research *** is very important of systematic summary and thorough analysis of the loess-bedrock landslide for reducing disasters caused by loess *** acquired achievements of the loess-bedrock landslide have been summarized on classification,formation mechanism,influencing factors and hazard range,and some main fields are put forward for further researching:（1） to explore the control action and boundary effect of paleo-weathering crust upon the top of bedrock for the loess-bedrock landslide;（2. to research the influence of the orientation and the top fluctuant configuration of bedrock and the slope structure on loess landslide;（3） to study the relationship between the landslide formation and the slope profile structure,the physical,hydrological and mechanical properties of the rock-soil mass;（4） to research the critical value of locked segment in the loess-bedrock cutting layer landslide;（5） to analyze the main influencing factors and forecast the hazard range of different types of the loess-bedrock landslide.

关键词： Loess-bedrock landslide Landslide classification Formation mechanism Hazard range Research advances.

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区域水环境承载力评价系统平台构建与应用

四川大学学报（工程科学版） 2011年第6期43卷 34-39页

作者：周洋周孝德张新华西安理工大学西北水资源与环境生态教育部重点实验室陕西西安710048 四川大学水力学与山区河流开发保护国家重点实验室四川成都610065

为了开发出具有普遍应用意义的区域水环境承载能力评价系统,通过可视化编程技术,地理信息系统以及数据库技术开发出了一套智能化的水环境承载力评价系统平台,并介绍了区域水环境承载力评价系统的总体设计、系统平台的功能以及系统的结... 详细信息

为了开发出具有普遍应用意义的区域水环境承载能力评价系统,通过可视化编程技术,地理信息系统以及数据库技术开发出了一套智能化的水环境承载力评价系统平台,并介绍了区域水环境承载力评价系统的总体设计、系统平台的功能以及系统的结构及应用。所建立的区域水环境承载力评价系统可有效地实现现状年水环境承载能力的计算、未来不同水平年的承载力预测以及对承载力计算结果进行空间展示。该系统通过在渭河流域关中地区应用,得出的评价结论与该地区因严重污染所导致的结果一致。

关键词：水环境污染承载能力评价系统渭河关中地区

贵州典型汞矿区作物对汞的累积特征及品质差异

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贵州农业科学 2012年第3期40卷 194-198页

作者：于萍萍刘鸿雁郭丹丹吴龙华骆永明贵州大学资源与环境工程学院贵州贵阳550025 中国科学院南京土壤研究所土壤环境与污染修复重点实验室江苏南京210008

为了摸清贵州典型汞矿区作物的受污染状况和汞矿污染对作物品质的影响,采用定点取样和实验室分析相结合的方法研究了贵州典型汞矿区水稻和玉米作物体内的汞累积特征,以及不同汞浓度下的作物品质差异。结果表明:1)汞矿区水稻籽粒的总汞... 详细信息

为了摸清贵州典型汞矿区作物的受污染状况和汞矿污染对作物品质的影响,采用定点取样和实验室分析相结合的方法研究了贵州典型汞矿区水稻和玉米作物体内的汞累积特征,以及不同汞浓度下的作物品质差异。结果表明:1)汞矿区水稻籽粒的总汞含量为0.14～0.71mg/kg,甲基汞含量为4.85～16.85μg/kg;玉米籽粒中的总汞含量为0.13～0.17mg/kg,甲基汞含量为2.31～3.67μg/kg:总汞含量均高于国家食品安全中的汞限量卫生标准(总汞≤0.02.g/kg)。2.水稻籽粒中的总汞和甲基汞含量普遍高于玉米。3)相关分析表明,不同汞矿区,水稻和玉米中的淀粉和粗蛋白与作物中的汞含量普遍呈负相关,其中,务川汞矿区水稻籽粒中的粗蛋白与总汞和甲基汞含量呈极显著和显著负相关(r=-0.996和-0.972.,淀粉与甲基汞含量呈显著负相关(r=-0.964);滥木厂汞矿区玉米籽粒中的粗蛋白与甲基汞含量呈极显著负相关(r=-0.967)。结论:贵州省典型汞矿区的主要粮食作物均受到了不同程度的汞污染,且高浓度的汞含量还影响了作物的物质转化,使水稻和玉米籽粒中的淀粉和粗蛋白含量降低。

关键词：典型矿区作物总汞甲基汞粗蛋白淀粉累积特征贵州

Feasibility study of the transient electromagnetic method for chamber blasting misfire detection and recognition

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engineering Sciences 2014年第6期12卷 111-116页

作者： Liu Liansheng Liang Longhua Wu Jiyang Jiao Yongbin Lu Zhexiang School of resources and environmental {2. Jiangxi University of Science and Technology Ganzhou Jiangxi 341000 China Jiangxi key laboratory of {2. {2. Ganzhou Jiangxi 341000 China Jiangxi Piaotang Tungsten Industry Co. Ltd. Ganzhou Jiangxi 341515 China

In this paper,transient electromagnetic method was used to carry out the feasibility study on the detection and recognition of chamber blasting ***,an electromagnetic background field was established in the test;secondly,a benign conductor was preset in the chamber,and then the background field was eliminated after the electromagnetic field was measured;thirdly,the transient electromagnetic field was measured again after blasting;at last,the chamber blasting misfire was detected and recognized by comparing the change of eddy current field of the preset benign conductor before and after *** test results showed that:When the buried depth of aluminum box target was no more than 30 m,transient electromagnetic method can clearly identify the position of the aluminum box;when the buried depth of aluminum box was more than30 m,the buried depth and position of the aluminum box was not sure due to the unknown level of secondary eddy current field generated by aluminum box.

关键词： transient electromagnetic methods chamber blasting misfire detection and recognition eddy cur- rent field target

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基于二次熵的互信息特征选取方法的研究

计算机科学 2004年第12期31卷 135-136,168页

作者：刘丽珍宋瀚涛陆玉昌首都师范大学北京100037 北京理工大学北京100081 清华大学北京100084

随着全球网络的普及应用,大量没有统一结构和管理的在线资源急需进行处理,高效的网页自动分类方法是从网上海量信息中提取所需信息的关键技术,特征选取又是文本分类挖掘的重要基础,本文以广义信息论为理论基础.提出了基于二次熵的互信... 详细信息

随着全球网络的普及应用,大量没有统一结构和管理的在线资源急需进行处理,高效的网页自动分类方法是从网上海量信息中提取所需信息的关键技术,特征选取又是文本分类挖掘的重要基础,本文以广义信息论为理论基础.提出了基于二次熵的互信息特征选取方法,独立评估特征集中的每个特征,分析特征和类别的关系,从高维的特征空间中选取出对文本分类有效的特征,降低了文本特征空间的维数,提高了文本分类的性能。

关键词：特征选取文本分类特征集互信息高维网页特征空间取出类方处理

Effect of Interfering Ions on Ammonium Nitrogen and Phosphate Recovery from Livestock Wastewater

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Effect of Interfering Ions on Ammonium Nitrogen and Phosphat...

2.12.环境污染与大众健康学术会议

作者： Tao Zhang , Rongfeng Jiang, Fusuo Zhang key laboratory of Plant-Soil Interactions of Ministry of Education, Department of {2. Science and {2., College of resources and {2. Sciences, China Agricultural university, Beijing 100193, PR China

Chemical precipitation by forming magnesium ammonium phosphate （MAP） is an efficient technology for ammonium nitrogen and phosphate recovery. In the present study, we examined the effect of interfering ions K + , Ca 2. , and CO 3 2. , on ammonium nitrogen and phosphate recovery from livestock wastewater. The conclusions were drawn as following: （1） with the Ca 2. concentration increased, NH 4 + recovery efficiency decreased and PO 4 3- recovery efficiency increased;（2. with the CO 3 2. concentration increased, NH 4 + and PO 4 3- recovery efficiency decreased;（3） with an increase in K + concentration, NH 4 + recovery efficiency decreased and PO 4 3- recovery efficiency did not change significantly.

关键词： Ammonium nitrogen interfering ions magnesium ammonium phosphate phosphate

Research on Reclaimed Land Quality Based on Peasant Households' Behaviors——A Case of the Reclaimed Land in Liuxin Country,xuzhou,China

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Asian Agricultural Research 2010年第5期2卷 61-64页

作者： LI Jing-jing1,MOU Shou-guo1,2.WANG Li1,WU Di1,MA Meng1,LIAN Ju-xia1 1.School of Environment Science and Spatial Informatics,China university of mining and {2.,xuzhou 2.1008,China 2.jiangsu key laboratory of resources and environmental information engineering,xuzhou 2.1008,China

The quality of reclaimed land not only relates to the way of reclamation,but also has close relations to farmers' living standard and households' *** the farmland in the reclamation region of the Liuxin County,Tongshan Town,xuzhou as the survey objects,we conduct a survey on peasant households in the reclamation region by the way of *** data collected from the survey are analyzed by using scientific statistical methods,including SPSS software and *** results show that in the investigation of peasant households' perceptual knowledge towards the quality of reclaimed land,42.5% of them holds the satisfactory and extremely satisfactory attitudes,which take relatively high *** a result of the increase of non-agricultural income,6% of peasant households are indifferent to the quality of the reclaimed *** the investigation of peasant households' rational knowledge towards the quality of the reclaimed land,the nitrogen content and organic content in soil filled by pulverized fuel ash are significantly lower than that in the soil filled by coal gangue and that in soil in the contrast *** current production and planting pattern of peasant households has not improved the quality of farmland in the reclaimed area effectively and most peasant households still use the traditional way of ***,it is necessary to strengthen the guide on the thought patterns of peasant households,to cultivate scientifically and to enhance the quality of reclaimed *** yields of the reclaimed farmland are low in the primary year,but with the increases of input and the restoration of the land,the annual yields will increase gradually,and gradually approaches to the usual *** on it,the corresponding countermeasures are put forward:for one thing,improving soil alkalescency and enhancing soil fertility;for another thing,attaching much attention to technological directions,scientific cultivation and carry out the standard

关键词： Reclaimed farmland Quality of the reclaimed land P