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• OAI收割 [15]

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浏览/检索结果: 共15条，第1-10条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 China's sustainable development evolution and its driving mechanism 期刊论文  OAI收割 ECOLOGICAL INDICATORS, 2022, 卷号: 143, 页码: 10 作者:  Wang, Di;  Ding, Fangyu;  Fu, Jingying;  Jiang, Dong   |  收藏  |  浏览/下载：11/0  |  提交时间：2023/02/27 Sustainable development  Key drivers  Driving mechanism  Machine learning approach   China's sustainable development evolution and its driving mechanism 期刊论文  OAI收割 ECOLOGICAL INDICATORS, 2022, 卷号: 143, 页码: 10 作者:  Wang, Di;  Ding, Fangyu;  Fu, Jingying;  Jiang, Dong   |  收藏  |  浏览/下载：23/0  |  提交时间：2023/02/27 Sustainable development  Key drivers  Driving mechanism  Machine learning approach   Simultaneously tackling ecological degradation and poverty challenges: Evidence from desertified areas in northern China 期刊论文  OAI收割 SCIENCE OF THE TOTAL ENVIRONMENT, 2022, 卷号: 815, 页码: 13 作者:  Liu, Shidong;  Zhang, Jianjun;  Zhang, Jie;  Guo, Yiqiang   |  收藏  |  浏览/下载：32/0  |  提交时间：2022/09/21 Desertification prevention  Ecological policy  National key ecological functional area  Poverty  Sustainable development   Application of unmanned underwater vehicles in polar research CNKI期刊论文  OAI收割 2021 作者:  ZENG Junbao;  LI Shuo;  LIU Ya   |  收藏  |  浏览/下载：1/0  |  提交时间：2024/12/18 unmanned underwater vehicle  polar ocean  scientific investigation  key technologies  development trend   Application of unmanned underwater vehicles in polar research 期刊论文  OAI收割 Advances in Polar Science, 2021, 卷号: 32, 期号: 3, 页码: 173-184 作者:  Zeng JB(曾俊宝);  Li S(李硕);  Liu Y(刘亚)   |  收藏  |  浏览/下载：21/0  |  提交时间：2021/10/30 unmanned underwater vehicle  polar ocean  scientific investigation  key technologies  development trend   The scale of biodiversity impacts of the Belt and Road Initiative in Southeast Asia 期刊论文  OAI收割 BIOLOGICAL CONSERVATION, 2020, 卷号: 248, 页码: - 作者:  Ng, Li Shuen;  Campos-Arceiz, Ahimsa;  Sloan, Sean;  Hughes, Alice C.;  Tiang, Darrel Chin Fung   |  收藏  |  浏览/下载：21/0  |  提交时间：2020/09/15 Belt and Road Initiative  Silk road  Maritime Silk Road  Infrastructure development  Biodiversity impacts  Biodiversity conservation  Key biodiversity areas   基于主体功能区的区域可持续发展协调性分析——以新疆北疆为例 学位论文  OAI收割 北京: 中国科学院大学, 2019 作者:  钟佳利   |  收藏  |  浏览/下载：86/0  |  提交时间：2021/12/10 主体功能区  可持续发展  协调发展度模型  关键影响因素  Main Functional Area  Sustainable Development  Coordinated Development Model  Key Influencing Factor   Suggestions on the development strategy of shale gas in China 期刊论文  OAI收割 journal of natural gas geoscience, 2016, 卷号: 1, 期号: 6, 页码: 413-423 作者:  Dazhong Dong;  Caineng Zou;  Jinxing Dai;  Shipeng Huang;  Junwei Zheng 收藏  |  浏览/下载：51/0  |  提交时间：2017/04/24 Organic black shale  Shale gas resources  Exploration and development  Development strategy  Key technology  Challenge   Recent key developments in isotactic polypropylene in-reactor alloy and in-reactor nanocomposite technology 期刊论文  OAI收割 SCIENCE CHINA-CHEMISTRY, 2016, 卷号: 59, 期号: 10, 页码: 1231-1239 作者:  Dong, Jinyong;  Qin, Yawei 收藏  |  浏览/下载：28/0  |  提交时间：2017/01/17 isotactic polypropylene  in-reactor alloy  in-reactor nanocomposite  key development   Structural design of large aperture rectangular mirror for space telescope (EI CONFERENCE) 会议论文  OAI收割 2nd International Conference on Civil Engineering and Transportation, ICCET 2012, October 27, 2012 - October 28, 2012, Guilin, China 作者:  Li Z.;  Li Z. 收藏  |  浏览/下载：43/0  |  提交时间：2013/03/25 Structural design of large aperture mirror is one of the key technologies for space telescope development. To meet the requirements of high stiffness  strength and thermal dimensional stability  some factors such as support scheme  materials selection  lightweight design and flexible support design were taken into account. The three supports location of the mirror was determined according to the modal analytical solution. By adjusting the parameters of flexure hinge  influences of gravity  assembly stress and thermal stress on the mirror were reduced obviously. Finite element analysis (FEA) results indicate that the surface accuracy reach to rms10.2nm and 10.8nm under the gravity along optical axis direction and 5C uniform temperature rise respectively  the fundamental frequency of the mirror component is 268Hz. Dynamics test shows that the first order natural frequency is 256Hz  which shows an error less than 5% compared to FEA results. (2013) Trans Tech Publications  Switzerland.