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筛选

浏览/检索结果: 共48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 Efficiency Evaluation of Insurance Companies From Multiperiod Perspective 期刊论文  OAI收割 IEEE TRANSACTIONS ON COMPUTATIONAL SOCIAL SYSTEMS, 2023, 页码: 19 作者:  Xie, Qiwei;  Zhao, Mengfan;  Li, Rong;  Li, Wen;  Zheng, Xiaolong   |  收藏  |  浏览/下载：26/0  |  提交时间：2023/11/16 DEA  insurance companies  leader-follower model  multiple periods   Effect of the interfacial microstructure on hardness of multi-layer diamond coatings 期刊论文  OAI收割 SURFACE & COATINGS TECHNOLOGY, 2023, 卷号: 464, 页码: 10 作者:  Liu, Yanming;  Wang, Mengrui;  Liu, Lusheng;  Song, Haozhe;  Hu, Tianwen   |  收藏  |  浏览/下载：8/0  |  提交时间：2024/01/07 Multi -layer diamond coatings  Interfaces  Microstructure  Modulation periods  Nanoindentation   Variations in monsoon precipitation over southwest China during the last 1500 years and possible driving forces 期刊论文  OAI收割 SCIENCE CHINA-EARTH SCIENCES, 2022, 卷号: 65, 期号: 5, 页码: 949-965 作者:  Liu, Bin;  Sheng, Enguo;  Yu, Keke;  Zhou, Kang'en;  Lan, Jianghu   |  收藏  |  浏览/下载：35/0  |  提交时间：2023/12/29 Lake sediments  Southwest China  Monsoon precipitation  Distinct climate periods  Inter-tropical Convergence Zone   Gridded reconstruction of the population in the traditional cultivated region of China from 1776 to 1953 期刊论文  OAI收割 SCIENCE CHINA-EARTH SCIENCES, 2021, 页码: 14 作者:  Zhang, Xuezhen;  Wang, Fahao;  Lu, Weidong;  Li, Shicheng;  Zheng, Jingyun   |  收藏  |  浏览/下载：27/0  |  提交时间：2022/09/21 Population  Traditional cultivated region of China (TCRC)  Historical periods  Gridded reconstruction   Gridded reconstruction of the population in the traditional cultivated region of China from 1776 to 1953 期刊论文  OAI收割 SCIENCE CHINA-EARTH SCIENCES, 2021, 页码: 14 作者:  Zhang, Xuezhen;  Wang, Fahao;  Lu, Weidong;  Li, Shicheng;  Zheng, Jingyun   |  收藏  |  浏览/下载：28/0  |  提交时间：2022/09/21 Population  Traditional cultivated region of China (TCRC)  Historical periods  Gridded reconstruction   Dynamics of Mid-Channel Bar during Different Impoundment Periods of the Three Gorges Reservoir Area in China 期刊论文  OAI收割 WATER, 2021, 卷号: 13, 期号: 23, 页码: 16 作者:  Tang, Qingqing;  Tan, Daming;  Ji, Yongyue;  Yan, Lingyun;  Zeng, Sidong   |  收藏  |  浏览/下载：32/0  |  提交时间：2022/08/22 mid-channel bars  morphological change  spatial distribution  different impoundment periods  Three Gorges Reservoir   Scenario-based extreme flood risk analysis of Xiong'an New Area in northern China 期刊论文  OAI收割 JOURNAL OF FLOOD RISK MANAGEMENT, 2021, 页码: 10 作者:  Wu, Feng;  Guo, Naliang;  Kumar, Pankaj;  Niu, Lulu   |  收藏  |  浏览/下载：41/0  |  提交时间：2021/06/10 different return periods scenarios  flood risk  hydrodynamic model  inundation extent  Xiong&apos  an New Area   Scenario-based extreme flood risk analysis of Xiong'an New Area in northern China 期刊论文  OAI收割 JOURNAL OF FLOOD RISK MANAGEMENT, 2021, 页码: 10 作者:  Wu, Feng;  Guo, Naliang;  Kumar, Pankaj;  Niu, Lulu   |  收藏  |  浏览/下载：28/0  |  提交时间：2021/06/10 different return periods scenarios  flood risk  hydrodynamic model  inundation extent  Xiong&apos  an New Area   Detection of Flare Multiperiodic Pulsations in Mid-ultraviolet Balmer Continuum, Lyl Hard X-Ray, and Radio Emissions Simultaneously 期刊论文  OAI收割 The Astrophysical Journal, 2021, 卷号: 921, 页码: 179 作者:  HXMT   |  收藏  |  浏览/下载：27/0  |  提交时间：2022/02/08 Solar flares  Solar oscillations  Solar ultraviolet emission  Solar  x-ray emission  Solar radio emission  1496  1515  1533  1536  1522  Astrophysics - Solar and Stellar Astrophysics  Abstract: Quasi-periodic pulsations (QPPs), which usually appear as temporal pulsations of the total flux, are frequently detected in the light curves of solar/stellar flares. In this study, we present the investigation of nonstationary QPPs with multiple periods during the impulsive phase of a powerful flare on 2017 September 6, which were simultaneously measured by the Hard X-ray Modulation Telescope (Insight-HXMT), as well as the ground-based BLENSW. The multiple periods, detected by applying a wavelet transform and Lomb-Scargle periodogram to the detrended light curves, are found to be ~20-55 s in the Ly`and mid-ultraviolet Balmer continuum emissions during the flare impulsive phase. Similar QPPs with multiple periods are also found in the hard X-ray emission and low-frequency radio emission. Our observations suggest that the flare QPPs could be related to nonthermal electrons accelerated by the repeated energy release process, i.e., triggering of repetitive magnetic reconnection, while the multiple periods might be modulated by the sausage oscillation of hot plasma loops. For the multiperiodic pulsations, other generation mechanisms could not be completely ruled out.   Dry and wet combination dynamics and their possible driving forces in a changing environment 期刊论文  OAI收割 JOURNAL OF HYDROLOGY, 2020, 卷号: 589, 页码: 10 作者:  Shi, Wuzhi;  Huang, Shengzhi;  Liu, Dengfeng;  Huang, Qiang;  Leng, Guoyong   |  收藏  |  浏览/下载：41/0  |  提交时间：2021/03/16 Adjacent seasons  Dry and wet combinations  Copula function  Joint return periods  Dynamics