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Object oriented land cover classification using ALS and GeoEye imagery over mining area

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中国有色金属学会会刊：英文版 2011年第S3期21卷 733-737页

作者： YU Hai-yang, CHENG Gang, GE Xiao-san, LU Xiao-ping key laboratory of {2. spatial information technologies of state bureau of surveying and mapping, henan polytechnic University, {12. 454000, china key laboratory of {2. spatial information technologies of state bureau of surveying and mapping Henan Polytechnic University Jiaozuo 454000 China

An object oriented coal mining land cover classification method based on semantically meaningful image segmentation and image combination of GeoEye imagery and airborne laser scanning (ALS) data was presented. First, DEM, DSM and nDSM (normalized Digital Surface Model, nDSM) were extracted from ALS data. The GeoEye imagery and DSM data were combined to create segmented objects based on neighbor regions merge method. Then 10 kinds of objects were extracted. Different kinds of vegetation objects, including crop, grass, shrub and tree, can be extracted by using NDVI and height value of nDSM. Water and coal pile field was extracted by using NDWI and the standard deviation of DSM method. Height differences also can be used to distinguish buildings from road and vacant land, and accurate building contour information can be extracted by using relationship of neighbor objects and morphological method. The test result shows that the total classification accuracy of the presented method is 90.78% and the kappa coefficient is 0.891 4.

关键词： airborne laser scanning GeoEye nDSM object oriented classification mining areas

Vision navigation algorithm for mine agent based on quaternion

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中国有色金属学会会刊：英文版 2011年第S3期21卷 610-615页

作者： LI Ke-zhao1, 4, LEI Wei-wei1, 2. GUO Zeng-zhang1, 2. WU Li-xin3, ZHANG Qin4 1. School of Survey and Land information Engineering, henan {2. University, jiaozuo 454003, china 2. key laboratory of mine spatial information technologies of state bureau of surveying and mapping, henan {2. University, jiaozuo 454003, china 3. College of Resources and Civil Engineering, Northeastern University, Shenyang 110819, china 4. College of Geology Engineering and Geomatics, Chang’an University, Xi’an 710054, china [a] School of Survey and Land information Engineering Henan Polytechnic University Jiaozuo 454003 China [b] key laboratory of {2. spatial information technologies of state bureau of surveying and mapping Henan Polytechnic University Jiaozuo 454003 China [c] College of Resources and Civil Engineering Northeastern University Shenyang 110819 China [d] College of Geology Engineering and Geomatics Chang'an University Xi'an 710054 China

Autonomous relative navigation is the key technology in mining or rescuing. On the basis of mine requirement and the theories of machine vision, an autonomous relative navigation algorithm for mine agent based on quaternion was proposed. In rotation transformation, this algorithm was represented by using quaternion. Because the Jacobi matrix of this method is lower than that of Hall algorithm, the calculation efficiency is improved by using this algorithm. The results of these experiments show that the computation burden of this algorithm based on quaternion is about half that of Hall algorithm. This algorithm based on quaternion is improved as a valid way to solve the problem of mine real-time navigation.

关键词： quaternion mine agent vision navigation

Annual integral changes of time serial NDVI in mining subsidence area

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中国有色金属学会会刊：英文版 2011年第S3期21卷 583-588页

作者： MA Chao1, GUO Zeng-zhang1, ZHANG Xiao-ke2. HAN Rui-mei1 1. key laboratory of {2. spatial information technologies of state bureau of surveying & mapping, henan polytechnic University, {12. 454000, china 2. School of Coal Mining Engineering, Taiyuan University of Technology, Taiyuan 03002., china [a] key laboratory of {2. spatial information technologies of state bureau of surveying & mapping Henan Polytechnic University Jiaozuo 454000 China [b] School of Coal Mining Engineering Taiyuan University of Technology Taiyuan 030024 China

By means of MORTRAN4 model of FLASSH module, an atmospheric correction of the SPOT II/IV data of four-year period for eight experimental coal faces of Lu'an mine area was done. The mining-affected zones were obtained with probability integral method. The normalized difference vegetation index (NDVI) and its mean were obtained by band ratio calculation at the mining subsidence area. Using FOURIER4 model of the fast Fourier transform (FFT) of discrete Fourier analysis theory, the mean NDVI time series data set was reconstructed. With the mean of NDVI transformed into amplitude and the phonological information transformed into phase, the law of NDVI variation by monthly, quarterly, annual were obtained. The annual integral of the time series of NDVI Fourier function (ANDVI) was obtained. The results show that an experience formula of ANDVI variation accompanies with mining time; A fast estimation formula of NPP by means of a coefficient of mining disturbance such as γ.

关键词： Lu’an mine area annual integral of NDVI net primary productivity coefficient of mining disturbance

Study on Design of Protective Coal Pillar for High Buildings

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Study on Design of Protective Coal Pillar for High Buildings

The Application Study about Ground-Based GPS Precipitable Water Vapor in Shijiazhuang and Qinhuangdao Region

2.10(沈阳)国际安全科学与技术学术研讨会

作者： CHAI Hua-bin~(1,2. (1.state bureau of {2. and mapping key laboratory of mine spatial information technologies,henan polytechnic University,{12. henan 454003,china 2.School of {2. and Land information Engineering,henan polytechnic University,{12. 454003,china)

＜正＞Considering the fact that the protective coal pillar is affected by the point load of high buildings,the calculating formula of the critical load and actual load of the protective coal pillar were worked *** the stability of the protective coal pillar under the load of the high buildings on the ground was analyzed by the *** to the geometric and physical natures of the major influence radius,which is one of the predicting parameters of surface displacement and distortion,a simple and useful method of designing protective coal pillar for high buildings were *** shows that the mining rate and the stability of the protective coal pillar can be improved,at the same time the ground high buildings can be protected from the mining damage by adopting the method.

关键词： high building protective coal pillar major influence radius stability

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The Application Study about Ground-Based GPS Precipitable Wa...

2.10 3rd IEEE International Conference on Computer Science and information Technology—ICCSIT 2.10

作者： Wang Yong 1 2.1.College of Traffic and surveying Hebei polytechnic University Tangshan {2. 2.key laboratory of mine spatial information technologies (henan polytechnic University henan {12. of surveying and mapping) state {12. of surveying and mapping jiaozuo {2. Ding Keliang School of surveying and Civil spatial information Beijing University of Civil Engineering and Architecture Beijing {2. He Rong School of surveying and Land Infomation Engineering henan polytechnic University jiaozuo {2. Liu Yanping College of Traffic and surveying Hebei polytechnic University Tangshan {2.

Water vapor is a highly variable parameter in atmospheric processes and it plays a crucial role in atmospheric motions on a wide range of scales in space and time. GPS technique has been widely used in retrieving precipitable water vapor. Firstly the article has retrieved precipitable water vapor of Qinhuangdao and Shijiazhuang stations by GPS technique. Then it has researched two aspects of precipitable water vapor. One is the spatial and temporal distribution characters of precipitable water vapor;the other is the relation between precipitable water vapor and actual rainfall. The value of GPS precipitable water vapor of Shijiazhuang is higher than the value of GPS precipitable water vapor of Qinhuangdao, which is accord to the formula that the precipitable water vapor is reduced from south to north. During the different time of a day, there are differ degree fluctuate which the min value present to morning and the max value present to evening. It also compared the GPS precipitable water vapor and actual rainfall. Although the time of max value about rainfall is not identical to the time of max value about precipitable water vapor, rainfall has occurred mostly in the time while the value of precpitable water vapor is high.

关键词： Global positioning system Precipitable water vapor Zenith tropospheric delay Zenith wet delay

来源： cnki会议评论

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多用户全球三维仿真的数据组织与调度研究

系统仿真学报 2011年第9期23卷 1896-1899页

作者：杨靖宇张永生蔡畅信息工程大学测绘学院郑州450052 矿山空间信息技术国家测绘局重点实验室河南理工大学、河南测绘局焦作454000 江西省数字国土重点实验室抚州344000

以多用户全球三维仿真为应用背景,研究P2.环境下海量数据的多点并行分发技术。通过依据地理空间的影像分块、编码协议和Tracker服务器所维护的资源拥有节点四叉树索引列表,实现P2.网络中的快速资源定位;利用基于数据预测、缓冲思想的优... 详细信息

以多用户全球三维仿真为应用背景,研究P2.环境下海量数据的多点并行分发技术。通过依据地理空间的影像分块、编码协议和Tracker服务器所维护的资源拥有节点四叉树索引列表,实现P2.网络中的快速资源定位;利用基于数据预测、缓冲思想的优先下载策略和用户节点间的直接数据交换,提高数据分发效率。最后,通过对现有的多用户三维地形可视化系统进行改造试验,证明该方法的有效性。

关键词：对等网络并行分发四叉树地形仿真

Analysis of stability of coal pillars with multi-coal seam strip mining

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中国有色金属学会会刊：英文版 2011年第S3期21卷 549-555页

作者： ZHANG Li-ya, DENG Ka-zhong, ZHU Chuan-guang, XING Zheng-quan Jiangsu key laboratory of Resources and Environmental {2. Engineering, china University of Mining and Technology, Xuzhou 2.1116, china Jiangsu key laboratory of Resources and Environmental {2. Engineering China University of Mining and Technology Xuzhou 221116 China

Strip mining is one of the efficient measures to control surface subsidence and mining damage. However, the researches on the laws of the geological mining factors to upper and lower pillar's stability are still deficient in multi-coal seam strip mining at present. Based on the three dimension fast Lagrangian analysis of continua (short for FLAC3D) numerical simulation software, the laws of the stress increasing coefficient on the coal pillar and its stability were systematically studied for different depths, different mining widths, different interlayer spacings, different mining thicknesses, different properties of interstratified rock and the spacial relations of the upper and lower pillars in vertical alignment in multi-coal seam strip mining. The function relation between the stress increasing coefficient of upper and lower pillars with the mining depth, mining widths, interlayer spacing, mining thickness, property of interstratified rock and the spatial relationship were obtained.

关键词： multi-coal seam strip mining FLAC3D numerical simulation stability of coal pillar

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线路勘测设计中的三维可视化协同环境

系统仿真学报 2006年第1期18卷 128-131,161页

作者：朱庆钟正周艳吴波武汉大学测绘遥感信息工程国家重点实验室湖北武汉430079

设计一个线路勘测设计的三维可视化协同环境,应用主席-委员模式的会议系统结构,以协同可视化设计层和协同管理层为核心的系统框架以及分布式加锁策略等实现多用户间的协同管理。同时,在三维可视化环境中,将每个线路模型的空间对象表示为... 详细信息

设计一个线路勘测设计的三维可视化协同环境,应用主席-委员模式的会议系统结构,以协同可视化设计层和协同管理层为核心的系统框架以及分布式加锁策略等实现多用户间的协同管理。同时,在三维可视化环境中,将每个线路模型的空间对象表示为Agent模型,它由具备推理能力的行为和描述对象空间特征的几何模型组成,以此实现多用户环境下线路的三维可视化协同设计与评价。

关键词：三维可视化协同环境智能体线路勘测设计