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Assessment of surface and subsurface waterlogging, water level fluctuations, and lithological variations for evaluating groundwater resources in Ganga Plains

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International Journal of digital Earth 2013年第3期6卷 276-296页

作者： Arvind Chandra Pandey Suraj Kumar Singh M.S.Nathawat Dipankar Saha Department of Remote Sensing Birla Institute of TechnologyMesraRanchiIndia Central Ground Water Board Ministry of Water ResourcesPatnaIndia

In the present study,the multi-temporal satellite images of IRS P6 LISS III were used to map waterlogging dynamics over different seasons.An area of 594.36 km2(6.75%)and 4.17 km^(2)(0.04%)was affected by surface waterlogging during pre and postmonsoon season,respectively.The average annual groundwater level fluctuations were calculated using 18 years(1990-2007)pre and postmonsoon groundwater level data to identify the areas which are under groundwater induced waterlogging conditions.The soil map clearly indicates that salinity and sodicity exhibit the highest severity and occur in areas with shallow groundwater levels.The hydrogeomorphical units mapped using IRS P6 LISS III satellite images are flood plain,alluvial plain,paleochannels,and oxbow lakes.The study revealed that 44.65%areas have very good to excellent groundwater resources.The litholog data clearly indicate an alternating sequence of clay and sand in which deep aquifers made up of coarse sand would be best suited for adequate water supply and good groundwater quality.The integrated study utilizing digital spatial data pertaining to waterlogging,soil salinity,water level fluctuation,and lithological variation proved that planning of any surface and subsurface water resources development activity should be taken up after assessments of said parameters.

关键词： waterlogging salinity Ganga plain digital earth groundwater resources digital data

Analysis on the development status of DNA storage based on papers and patents

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High Technology Letters 2021年第2期27卷 218-225页

作者：郑彦宁 Yuan Fang An Shudi Institute of Scientific and Technical Information of China Beijing 100038P.R.China

DNA storage as a disruptive technology is expected to solve the problem of massive data storage.Based on bibliometric analysis of DNA storage related papers and patents,this paper analyzes the development trend of DNA storage technology.The results show that DNA technology is still in the development stage,in which only a small number of researchers are involved.USA is the global leading country of DNA storage research.Both universities and companies in USA have played an important role in promoting DNA storage research.China is second only to USA in the number of DNA storage related papers or patents.However,in terms of patents layout,Chinese institutions don’t have sufficient intention of opening up the global market in the application of DNA storage.Although there have been several breakthrough advances in DNA storage,there are still many challenges to be solved.

关键词： DNA storage information digital data bibliometric analysis 0 Introduction

基于数字平台下的耕地及其背景的分析_以重庆市为例

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生态学杂志 2001年第Z1期20卷 64-66页

作者：杨存建王思远张增祥赵晓丽周全斌云南大学生态学与地植物学研究所昆明650091 中国科学院遥感应用研究所再生室北京100101 中国科学院遥感应用研究所再生室北京100101 中国科学院遥感应用研究所再生室北京100101 中国科学院遥感应用研究所再生室北京100101

随着人口的增长,毁林开荒和过度开垦导致森林的破坏,生物多样性的减少,水土流失加剧,土壤退化和环境恶化.我国1998年发生在长江中下游的特大洪水灾害与其中上游的森林植被破坏有着密切的关系[1].生态环境建设是我国西部开发战略的重点之... 详细信息

随着人口的增长,毁林开荒和过度开垦导致森林的破坏,生物多样性的减少,水土流失加剧,土壤退化和环境恶化.我国1998年发生在长江中下游的特大洪水灾害与其中上游的森林植被破坏有着密切的关系[1].生态环境建设是我国西部开发战略的重点之一.退耕还林还草是生态环境建设中的一个重要举措.利用先进的地理信息系统技术对不同耕地类型及其背景进行空间分析,为退耕还林还草提供重要的科学依据.本文以重庆市为例,开展了这方面的探讨.　　……

关键词：数字平台耕地类型重庆市 Chongqing City digital data 退耕还林还草生态环境建设信息系统技术森林植被破坏生物多样性长江中下游土壤退化水土流失空间分析开发战略毁林开荒环境恶化洪水灾害中上游增长

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明日简讯

海外英语 2003年第9期 14-页

作者：李萌

　　Pictures You Can Walk through 可以穿越的图片　　A unique new projection platform-fog-will allow viewers to walk through images on display. The fog screen, developed by researchers at Tampere University of Technology in Finland, injects digital data into a laminar (薄片状的 ), nonturbulent (非扰动的) airflow, creating a thin and swiftly flowing wall that viewers can simply walk through. The fog screen could find wide applications in advertising, science museum displays, public presentations, training, and gaming.……

关键词： digital data 图片扰动片状