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浏览/检索结果: 共34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 Core Microbiome and Microbial Community Structure in Coralloid Roots of Cycas in Ex Situ Collection of Kunming Botanical Garden in China 期刊论文  OAI收割 MICROORGANISMS, 2023, 卷号: 11, 期号: 9, 页码: 2144 作者:  Wang,Zhaochun;  Liu,Jian;  Xu,Haiyan;  Liu,Jiating;  Zhao,Zhiwei   |  收藏  |  浏览/下载：10/0  |  提交时间：2024/05/09 Cycas  coralloid root  core microbiome  Desmonostoc  Exophiala  APOGEOTROPIC ROOTS  PLANT  ENDOPHYTES  DIVERSITY  IDENTIFICATION  RHIZOSPHERE  DISTINCT  BALANCE   Effects of hydrate occurring mechanisms and saturation on the mechanical properties of hydrate-bearing sediments: Numerical study based on simplified DEM simulation 期刊论文  OAI收割 JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING, 2022, 卷号: 108, 页码: 10 作者:  Han, Zhenhua;  Zhang, Luqing;  Zhou, Jian;  Pan, Zhejun;  Wang, Song   |  收藏  |  浏览/下载：22/0  |  提交时间：2023/03/31 Hydrate-bearing sediments  Hydrate occurring mechanisms  Triaxial test  Mechanical properties  Distinct element   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：33/0  |  提交时间：2023/12/29 Lake sediments  Southwest China  Monsoon precipitation  Distinct climate periods  Inter-tropical Convergence Zone   Numerical simulation of the Rongcharong paleolandslide river-blocking event: implication for the longevity of the landslide dam 期刊论文  OAI收割 LANDSLIDES, 2022, 页码: 18 作者:  Yan, Jianhua;  Chen, Jianping;  Zhou, Fujun;  Li, Yongchao;  Zhang, Yiwei   |  收藏  |  浏览/下载：41/0  |  提交时间：2022/07/06 Paleolandslide river-blocking event  Numerical simulation  Topography restoration  Distinct element method  Landslide dam longevity   Study on the Effect of Loading Method on Mechanical Behavior of Rockbolt Based on DEM Modeling 期刊论文  OAI收割 INTERNATIONAL JOURNAL OF GEOMECHANICS, 2022, 卷号: 22, 期号: 7, 页码: 1-13 作者:  Han T(韩滔)   |  收藏  |  浏览/下载：30/0  |  提交时间：2022/05/29 Fully grouted rockbolt  Rockbolt pullout test  Compression test on bolted rock mass  Mechanical behavior  Distinct element method   Impacts of regional land-use patterns on ecosystem services in the typical agro-pastoral ecotone of northern China 期刊论文  OAI收割 ECOSYSTEM HEALTH AND SUSTAINABILITY, 2022, 卷号: 8, 期号: 1, 页码: 2110521-1-20 作者:  Chen, Huimin;  Zhao, Yu;  Fu, Xiao;  Tang, Mingfang;  Guo, Mingjie   |  收藏  |  浏览/下载：21/0  |  提交时间：2023/02/02 Distinct land use  land cover (LULC) patterns  Spatial-temporal evolution of ecosystem services (ESs)  Agro-pastoral ecotone of northern China  InVEST models  Structural equation modeling (SEM)   Functional Characterization of the Stipa purpurea P5CS Gene under Drought Stress Conditions 期刊论文  OAI收割 INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES, 2021, 卷号: 22, 期号: 17, 页码: 9599 作者:  Yang,Danni;  Ni,Ruize;  Yang,Shihai;  Pu,Yanan;  Qian,Min   |  收藏  |  浏览/下载：62/0  |  提交时间：2022/04/02 Stipa purpurea  P5CS  proline  drought tolerance  INDUCED PROLINE ACCUMULATION  PLAY DISTINCT ROLES  1ST 2 STEPS  DELTA(1)-PYRROLINE-5-CARBOXYLATE SYNTHETASE  SALT STRESS  CONFERS TOLERANCE  EXPRESSION  BIOSYNTHESIS  L.  DEGRADATION   Geometrically distinct solutions of nonlinear elliptic systems with periodic potentials 期刊论文  OAI收割 ARCHIV DER MATHEMATIK, 2020, 页码: 14 作者:  Yang, Zhipeng;  Yu, Yuanyang   |  收藏  |  浏览/下载：12/0  |  提交时间：2021/01/14 Nonlinear elliptic systems  Geometrically distinct solutions  Variational methods   An underlying clock in the extreme flip-flop state transitions of the black hole transient Swift J1658.2-4242 期刊论文  OAI收割 Astronomy and Astrophysics, 2020, 卷号: 641, 页码: A101 作者:  HXMT   |  收藏  |  浏览/下载：58/0  |  提交时间：2022/02/08 accretion  accretion disks  black hole physics  X-rays: binaries  time  Astrophysics - High Energy Astrophysical Phenomena  Abstract: Aims: Flip-flops are top-hat-like X-ray flux variations, which have been observed in some transient accreting black hole binary systems, and feature simultaneous changes in the spectral hardness and the power density spectrum (PDS). They occur at a crucial time in the evolution of these systems, when the accretion disc emission starts to dominate over coronal emission. Flip-flops remain a poorly understood phenomenon, so we aim to thoroughly investigate them in a system featuring several such transitions. Methods: Within the multitude of observations of Swift J1658.2-4242 during its outburst in early 2018, we detected 15 flip-flops, enabling a detailed analysis of their individual properties and the differences between them. We present observations by XMM-Newton, NuSTAR, Astrosat, Swift, Insight-HXMT, INTEGRAL, and ATCA. We analysed their light curves, searched for periodicities, computed their PDSs, and fitted their X-ray spectra, to investigate the source behaviour during flip-flop transitions and how the interval featuring flip-flops differs from the rest of the outburst. Results: The flip-flops of Swift J1658.2-4242 are of an extreme variety, exhibiting flux differences of up to 77% within 100 s, which is much larger than what has been seen previously. We observed radical changes in the PDS simultaneous with the sharp flux variations, featuring transitions between the quasi-periodic oscillation types C and A, which have never been observed before. Changes in the PDS are delayed, but more rapid than changes in the light curve. Flip-flops occur in two intervals within the outburst, separated by about two weeks in which these phenomena were not seen. Transitions between the two flip-flop states occurred at random integer multiples of a fundamental period of 2.761 ks in the first interval and 2.61 ks in the second. Spectral analysis reveals the high and low flux flip-flop states to be very similar, but distinct from intervals lacking flip-flops. A change of the inner temperature of the accretion disc is responsible for most of the flux difference in the flip-flops. We also highlight the importance of correcting for the influence of the dust scattering halo on the X-ray spectra.   Temperature-mediated responses of carbon fluxes to precipitation variabilities in an alpine meadow ecosystem on the Tibetan Plateau 期刊论文  OAI收割 ECOLOGY AND EVOLUTION, 2019, 页码: 13 作者:  Chen, Ning;  Zhang, Yangjian;  Zhu, Juntao;  Zu, Jiaxing;  Huang, Ke   |  收藏  |  浏览/下载：47/0  |  提交时间：2019/09/24 alpine meadow  carbon fluxes  community composition  distinct response  precipitation  warming