高分辨率对地观测技术在智慧城市中的应用     

李德仁 《测绘信息与工程》2013,(6):1-5

从智慧城市的概念和发展历程出发,提出数字城市、物联网、云计算等智慧城市建设的关键技术,探讨了高分辨率对地观测技术在智慧城市建设中的应用,列举了智慧城市的典型应用,指出了从数字城市发展到智慧城市的必然趋势,并展望智慧城市的挑战和美好前景。  相似文献   

基于DEM的GPS仿真观测实现     

丁超营  熊永良  林超才 《测绘科学》2013,38(3):175-177,180

利用GPS仿真测量技术不需野外观测即可获得大量所需观测数据,可用于最优GPS选点、最优作业方案制定、各种复杂环境下GPS测量精度和可靠性研究、各种GPS应用研究等领域。本文给出了GPS仿真的原理、方法及误差模型,利用Visual Basic.Net语言对ArcGIS进行了二次开发,编制了基于DEM的静态GPS观测值的仿真软件,并通过仿真数据分析,可以得出最优测站位置和最佳的观测时段。  相似文献   

A decade of Predictions in Ungauged Basins (PUB)—a review   总被引：2，自引：0，他引：2  

M. Hrachowitz  H.H.G. Savenije  G. Blöschl  J.J. McDonnell  M. Sivapalan  J.W. Pomeroy 《水文科学杂志》2013,58(6):1198-1255

Abstract

The Prediction in Ungauged Basins (PUB) initiative of the International Association of Hydrological Sciences (IAHS), launched in 2003 and concluded by the PUB Symposium 2012 held in Delft (23–25 October 2012), set out to shift the scientific culture of hydrology towards improved scientific understanding of hydrological processes, as well as associated uncertainties and the development of models with increasing realism and predictive power. This paper reviews the work that has been done under the six science themes of the PUB Decade and outlines the challenges ahead for the hydrological sciences community.

Editor D. Koutsoyiannis

Citation Hrachowitz, M., Savenije, H.H.G., Blöschl, G., McDonnell, J.J., Sivapalan, M., Pomeroy, J.W., Arheimer, B., Blume, T., Clark, M.P., Ehret, U., Fenicia, F., Freer, J.E., Gelfan, A., Gupta, H.V., Hughes, D.A., Hut, R.W., Montanari, A., Pande, S., Tetzlaff, D., Troch, P.A., Uhlenbrook, S., Wagener, T., Winsemius, H.C., Woods, R.A., Zehe, E., and Cudennec, C., 2013. A decade of Predictions in Ungauged Basins (PUB)—a review. Hydrological Sciences Journal, 58 (6), 1198–1255.  相似文献   

巴塘地震台近震弱S波震级偏差研究          下载免费PDF全文

何韬  刘涛  李小萍  唐云辉 《地震工程学报》2013,35(S1):81-84

分析了2009年至2012年巴塘台测定的M_L≥3.0的近震共540个,计算出了它们与中国地震台网中心(CSN)发布的M_L震级之间的偏差,找出了巴塘台弱S波出现的区域。用相同标准震级,相等震中距的方法,找出了正常波形记录与弱S波波形记录之间的振幅比,计算出了弱S波地震的震级偏差程度,发现该台记录到的弱S波的比例高达46.5%,弱S波的震级偏差达0.7,其结果有利于地震震级测定的准确性.  相似文献   

河源台地电专用电源和外线路故障查修方法     

陈智群  刘吉平  李敬 《华南地震》2013,33(2)

对C-ATS地电仪专用观测电源的原理和特点进行了简要介绍,并对其供电电源和外线路故障的查修方法作了较详细的阐述,列举故障实例,逐一说明检查维修过程.最后指出地电台站工作人员掌握一定的故障排查维护经验非常必要,对仪器的安全运行,及其产出数据的可靠性和连续性都有积极意义.  相似文献   

Modelling of land use land cover change using earth observation data-sets of Tons River Basin,Madhya Pradesh,India     

Sudhir Kumar Singh  Prosper Basommi Laari  Sk. Mustak  Prashant K. Srivastava  Szilárd Szabó 《国际地球制图》2013,28(11):1202-1222

Abstract

An integrated Markov Chain and Cellular Automata modelling (CA MARKOV), multicriteria evaluation techniques have been applied to produce transition probability. The unsupervised method was employed to classify the satellite images of year 1985, 1995, 2005 and 2015 to meet the magnitude of LULC change. Results showing the spatial pattern of the sub-basin is largely influenced by the biophysical and socio-economic drivers leading to growth of agricultural lands and built-up area in the basin. Simulated plausible future LULC changes for 2025 which is based on a CA MARKOV that integrates Markovian transition probabilities computed from satellite-derived LULC maps and a CA contiguity spatial filter (5 × 5). Further, the fragmentation analysis was performed to check the fragmentation scenario in the year 2025. The result for year 2025 with reasonably good accuracy will be useful to the planners, policy- and decision-makers.  相似文献   

GPS无验潮多波束水下地形测量技术的分析与应用     

何广源  吴迪军  李剑坤 《地理空间信息》2013,11(2):155-156,159

介绍了GPS无验潮多波束水下地形测量的基本原理及方法要点。以琼州海峡跨海通道工程水下地形测量为例,对GPS潮位修正及多波束水深测量结果进行了分析。结果表明,综合运用GPS RTK和多波束测深技术进行宽水域水下地形测绘,可有效提高测量精度和工作效率。  相似文献   

二等跨海水准测量两种方案分析     

申仲舒 《测绘与空间地理信息》2013,(10):208-210

通过对两段各约2．5km的二等跨海水准测量不同的布设观测方法分析比较,方案Ⅱ采用双棱镜同时对向观测、完全不量仪器高和觇标高等关键技术,提高了作业效率。  相似文献   

浅析基于Lecai DNA003水准仪在等级水准测量中的应用     

汪铁华 《测绘与空间地理信息》2013,36(7):220-221

介绍Lecai DNA003型电子水准仪在西煤东运煤炭基地三等水准测量项目中的实际应用情况,结合实际作业经验对仪器的不足之处讨论了解决办法,以提高工作效益。  相似文献   

Service-oriented infrastructure for flood mapping using optical and SAR satellite data     

《International Journal of Digital Earth》2013,6(10):829-845

In this paper, we present the service-oriented infrastructure within the Wide Area Grid project that was carried out within the Working Group on Information Systems and Services of the Committee on Earth Observation Satellites. The developed infrastructure integrates services and computational resources of several regional and national Grid systems: Ukrainian Academician Grid (with satellite data processing Grid segment, UASpaceGrid) and Grid system at the Center on Earth Observation and Digital Earth of Chinese Academy of Sciences. The study focuses on integrating geo-information services on flood mapping provided by Ukrainian and Chinese entities to benefit from information acquired from multiple sources. We also describe services for workflow automation and management in Grid environment and provide an example of workflow automation for generating flood maps from optical and synthetic-aperture radar satellite imagery. We also discuss issues of enabling trust for the infrastructure using certificates and reputation-based model. Applications of utilizing the developed infrastructure for operational flood mapping in Ukraine and China are given as well.  相似文献