检索结果-南通市图书馆

2012–2014 China's Earth Observation and Earth Science Development

在线全文

学校读者我要写书评

暂无评论

空间科学学报 2014年第5期34卷 721-732页

作者： guo huadong MA Jianwen XIAO Han LU Feng LIANG Dong BI Haiyun WANG Fangjian Institute of Remote Sensing and Digital Earth Chinese Academy of Sciences Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences University of Chinese Academy of Sciences

Human beings are now facing global and regional sustainable development challenges.In China, Earth observation data play a fundamental role in Earth system science research. The support given by Earth observation data is required by many studies, including those on Earth's limited natural resources, the rapid development of economic and social needs, global change, extreme events, food security, water resources, sustainable economic and urban development, and emergency response. Application operation systems in many ministries and departments in China have entered a stage of sustainable development, and the State Key Project of High-Resolution Earth Observation Systems has been progressing since 2006. Earth observation technology in China has entered a period of rapid development.

关键词： Earth observation Earth system science Big data High-resolution Earth observation systems Global and regional sustainable development

地球大数据评估中国环境类可持续发展目标进展

在线全文

学校读者我要写书评

暂无评论

Science Bulletin 2023年第24期68卷 3129-3132页

作者：郭华东黄磊骆磊刘洁李晓松 International Research Center of Big Data for Sustainable Development Goals Beijing 100094China Aerospace Information Research Institute Chinese Academy of SciencesBeijing 100094China

We have passed the halfway point towards achieving the 2030 Agenda for Sustainable Development since its adoption in 2015.Monitoring the Sustainable Development Goals(SDGs)and conducting a mid-term evaluation of their... 详细信息

关键词： Sustainable 可持续发展目标数据评估

在线全文

学校读者我要写书评

暂无评论

新型SAR对地环境观测

测绘学报 2022年第6期51卷 862-872页

作者：郭华东吴文瑾张珂李新武可持续发展大数据国际研究中心北京100094 数字地球重点实验室中国科学院空天信息创新研究院北京100094 中国科学院大学北京100049

合成孔径雷达(SAR)系统在对地观测中具有全天时全天候的独特优势。近十几年来,多模式、多角度、多维度、大幅宽、高分辨率、多基协同等SAR技术的问世,代表着新型SAR观测时代的到来。为对这一SAR发展阶段的特点和能力进行分析,本文首先... 详细信息

合成孔径雷达(SAR)系统在对地观测中具有全天时全天候的独特优势。近十几年来,多模式、多角度、多维度、大幅宽、高分辨率、多基协同等SAR技术的问世,代表着新型SAR观测时代的到来。为对这一SAR发展阶段的特点和能力进行分析,本文首先介绍了新型SAR系统观测能力的发展,包括如何获取大范围、多时相、多层次SAR综合对地观测数据及实现月基SAR等观测技术;然后,总结了杂交介质建模、时频分解、深度学习、压缩感知等新型信息提取方法在SAR领域发挥的作用;最后,介绍了新型SAR在城市管理、植被调查、极地与海洋测绘以及灾害监测等领域的研究进展,旨在推动SAR观测技术在测绘领域更广泛而深入的应用。

关键词：合成孔径雷达对地观测测绘

在线全文

学校读者我要写书评

暂无评论

地球系统空间观测:从科学卫星到月基平台

遥感学报 2016年第5期20卷 716-723页

作者：郭华东中国科学院遥感与数字地球研究所北京100094

五十多年来,全球性对地观测已形成强大的技术能力和系统体系,在不同应用领域发挥了重要作用。随着对陆地、大气、海洋研究的深入,地球系统科学和全球变化研究正在向空间对地观测技术提出新的重大战略性需求。本文描述了面向全球变化应... 详细信息

五十多年来,全球性对地观测已形成强大的技术能力和系统体系,在不同应用领域发挥了重要作用。随着对陆地、大气、海洋研究的深入,地球系统科学和全球变化研究正在向空间对地观测技术提出新的重大战略性需求。本文描述了面向全球变化应对、发展全球变化系列科学卫星的方案;提出面向宏观地球科学现象探测、构建月基对地观测系统的设想;同时,作为宏观地球科学现象研究的一个方向,论述了利用地球科学卫星和月基对地观测技术开展全球变化"三极"对比研究的思路。

关键词：地球系统科学全球变化科学卫星月基对地观测 “三极”对比

Research on global change scientific satellites

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2014年第1期57卷 204-215页

作者： guo huadong FU WenXue LI XinWu CHEN Pei LIU Guang LI Zhen WANG Cheng DONG Qing LEI LiPing BAI LinYan LIU QingJie Institute of Remote Sensing and Digital Earth Chinese Academy of Sciences School of Astronautics Beijing University of Aeronautics & Astronautics

Global change now poses a severe threat to the survival and development of mankind.Large-scale,real-time,highly accurate Earth observation from space has become a key technology used to observe global change.China is one of the most influential countries affecting and being affected by global change,yet it has no scientific satellite for global change research so far.Developing global change scientific satellites not only would meet an important demand of China,but also would be a valuable contribution to the world.By analyzing the mechanisms of space-based observation of variables sensitive to global change,this paper explores the concept of global change scientific satellites,and proposes a series of global change scientific satellites to establish a scientific observation system for global environmental change monitoring from space.

关键词：全球变化科学卫星地球观测全球环境变化空间高度中国人类监测

Light People:Prof.Eric Mazur speaks about ultrafast optics and education

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2024年第3期13卷 402-406页

作者： Chenzi guo Yang Li Changchun Institute of Optics Fine Mechanics and PhysicsChinese Academy of SciencesChangchunChina State Key Laboratory of Precision Measurement Technology and Instrument Department of Precision InstrumentTsinghua UniversityBeijingChina

Prof.Eric Mazur is a great influencer over and beyond the optics community.As a physicist,he is a pioneer of ultrafast optics and was one of the inventors of colliding-pulse mode-locked laser.As an educator,he not only gave talks to thousands,but also revolutionized teaching with his globally renowned methodology“Peer Instruction”.As a leader and entrepreneur,he co-founded several companies and was President of Optica(formerly the Optical Society)and currently is the Chair of the Optica Foundation.Here,Light:Science&Applications talked with Prof.Eric Mazur about his opinions on research,education and industry.The full interview video can be found in the Supplementary File.

关键词： optics education companies

异喹啉修饰金属有机骨架配合物的合成及其二氧化碳和碘的吸附性能

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

吉林大学学报:理学版 2023年第5期61卷 1230-1236页

作者：米生雍郭华东长春师范大学化学学院长春130032

合成一种异喹啉修饰的金属有机骨架配合物[Cu_(3)(L)_(3)·2DMF]·2DMF,并通过元素分析、热重分析、红外光谱、X单晶射线和衍射粉末X射线衍射对该配合物的结构进行表征.结果表明,该配合物具有{3,4,6}-连接的新型拓扑网络结构,可选择性... 详细信息

合成一种异喹啉修饰的金属有机骨架配合物[Cu_(3)(L)_(3)·2DMF]·2DMF,并通过元素分析、热重分析、红外光谱、X单晶射线和衍射粉末X射线衍射对该配合物的结构进行表征.结果表明,该配合物具有{3,4,6}-连接的新型拓扑网络结构,可选择性分离甲烷中的CO_(2),并对溶液中的碘有良好的吸附性能,最大吸附量达661.84 mg/g.

关键词：金属有机骨架配合物碘吸附异喹啉

Emerging direct current triboelectric nanogenerator for high-entropy mechanical energy harvesting

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2024年第5期67卷 1297-1316页

作者： CHEN Jie guo RuiLong guo HengYu College of Physics and Electronic Engineering Chongqing Normal UniversityChongqing 401331China Department of Applied Physics Chongqing UniversityChongqing 401331China

In the era of the Internet of Things(IoT),the provision of sustainable power to distributed,mobile,and low-power-consumption electronic devices is a critical challenge.To overcome this challenge,the triboelectric nanogenerator(TENG),a highly efficient high-entropy mechanical energy harvesting device,was developed in 2012.This device enables the direct conversion of irregular and low-frequency mechanical energy into pulsed alternating current(AC)signals.However,the incompatibility of most electronic devices with AC signals necessitates rectifier circuits or generators that deliver direct current(DC)signals.In recent years,DC-TENGs have undergone extensive development,achieving significant milestones in various application fields while also facing crucial challenges that require solutions.In this review,three categories of DC-TENG devices with distinct operating mechanisms are comprehensively explored:multiphase coupling,mechanical rectification,and air breakdown.Their typical structures and working mechanisms are thoroughly discussed,and specific output performance limitations,along with corresponding optimization strategies,are identified.Furthermore,the applications of DC-TENGs in various scenarios are summarized.Finally,the challenges faced by DC-TENGs and potential solutions are analyzed to guide further advancements in this technology.

关键词： TENG direct current working mechanisms output performance limitations optimization strategies

Light People:Prof.Kei May Lau,newly elected US NAE member in Hong Kong,talks about future of photonics and women in science

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2024年第4期13卷 602-608页

作者： Yating Wan Chenzi guo Electrical and Computer Engineering the ComputerElectrical and Mathematical Sciences and Engineering DivisionKing Abdullah University of Science and Technology23955-6900 ThuwalSaudi Arabia Changchun Institute of Optics Fine Mechanics and PhysicsChinese Academy of SciencesChangchunChina

Editorial Photonics technology remains a driving force in today’s scientific landscape,marked by continuous innovation and crossdisciplinary relevance.In an enlighting conversation with Light:Science&Applications,Prof.Kei May Lau,a pioneer in photonics research,shares her deep insights on the evolution of technologies of LEDs,lasers,challenges of hetero-epitaxy,and the future of micro-LEDs and quantum dot lasers.Recently honored as a member of the US National Academy of Engineering(NAE)for her significant contributions to photonics and electronics using III-V semiconductors on silicon,Prof.Lau stands out as the sole Hong Kong scholar inducted into the NAE this year,joining 114 new and 21 international members.In this exclusive Light People interview,Prof.Lau shares her journey as a pioneering woman in engineering,her commitment to mentorship and academia,and her perspective on advancing female representation in science.The summary provided is distilled from Prof.Lau’s thoughtful responses during the interview.For a deeper exploration of Prof.Lau’s experiences and advice,the full interview is available in the Supplementary material.

关键词： interview lighting driving