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INTRODUCTION Dynamics of carbon and water vapor fluxesexchange between the atmosphere and the ecosystembiosphere, depend on complex and non-liner interplayamong physiological, ecological, biochemical andedaphic factors and meteorological conditions (Jarvis,1995; Leuning et al., 1995). There are many studiesquantifying the fluxes across different time and spacescales as well as assessing the environment con-straints on them by some kinds of biophysical orempirical models whose resul… 相似文献
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Xing Yang Zhao-Long Gu Huimin Wang Jing-Jing Xian Sheng Meng Naoto Nagaosa Wen-Hao Zhang Hai-Wen Liu Zi-Heng Ling Kai Fan Zhi-Mo Zhang Le Qin Zhi-Hao Zhang Yan Liang Jian-Xin Li Ying-Shuang Fu 《国家科学评论(英文版)》2023,(3):127-133
Correlated states have emerged in low-dimensional systems owing to enhanced Coulomb interactions.Elucidating these states requires atomic-scale characterization and delicate control capabilities.Herein,spectroscopic imaging-scanning tunneling microscopy was employed to investigate the correlated states residing in 1D electrons of the monolayer and bilayer MoSe2 mirror twin boundary(MTB).The Coulomb energies,determined by the wire length,drive the MTB into two types of ground states with distinct... 相似文献
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Zijian Qin Chao Qian Lian Shen Xiaoping Wang Ido Kaminer Hongsheng Chen Huaping Wang 《国家科学评论(英文版)》2023,(7):91-97
Inspired by the concept of superscattering in optics,we for the first time theoretically predict and experimentally demonstrate the superscattering phenomenon in water waves.The subwavelength superscatterer is constructed by multi-layered concentric cylinders with an inhomogeneous depth profile.The superscatterer breaks the long-held single-channel scattering limit by several times and thus significantly enhances the total scattering strength.The underlying mechanism originates from the near deg... 相似文献
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Binze Tang Yizhi Song Mian Qin Ye Tian Zhen Wei Wu Ying Jiang Duanyun Cao Limei Xu 《国家科学评论(英文版)》2023,(7):114-123
Relevant to broad applied fields and natural processes,interfacial ionic hydrates have been widely studied by using ultrahigh-resolution atomic force microscopy(AFM).However,the complex relationship between the AFM signal and the investigated system makes it difficult to determine the atomic structure of such a complex system from AFM images alone.Using machine learning,we achieved precise identification of the atomic structures of interfacial water/ionic hydrates based on AFM images,including t... 相似文献
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Qin Zhen Zhu Wenyi 《中外文化交流(英文版)》2008,(2):16-18
Private collection in Beijing dates back to 800 years and saw its heydays in the early 20th century. The long history of private collection has enabled the city to take the leading place in China＇s collection field. Over the past two decades, in particular, collection has gained increasing popularity among ordinary people in Beijing and some have even run privately-owned museums. 相似文献
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Language is the tool of communication. English is a compulsory course for every student. English listening, as an essential part of English learning, is an effective way to obtain new information. But for many students, the most difficult part for them is listening. The paper aims to give some suggestions to the college English learners and to help them to improve their listening comprehension abilities. Such as: to strengthen language knowledge, to build up self-confidence, to use listening strategies, to learn western culture, and to listen extensively. 相似文献
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职教难办，职校校长难当，这早已是共识。那么，怎样才能当好职校校长呢？笔者长期管理职教、指导校长办学，注意研究校长的工作，认为：一名好的职校校长要能够把握职教工作的综合性特点，正确运用教育和经济两个方面运作法则，精于教育、善于经营、长于管理。一位基层领导给职校校长设计一个完整的工作形象，即：教育教学像教授，经营学校像经理，管理学校像县长。要达到这三个“像”，就必须树立四个意识、提高六大能力。 一、四个意识 意识反作用于客观存在，校长树立正确的意识是做好工作的思想基础，对学校的生存和发展影响巨大… 相似文献
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ZHU Yong GAN Jun-jiang ZHANG Guo-liang YAO Bin ZHU Wen-jie MENG Qin 《浙江大学学报(A卷英文版)》2007,8(9):1514-1520
In this work,rhamnolipid production was investigated using waste frying oil as the sole carbon source. By culture in shaking flasks,a naturally isolated strain synthesized rhamnolipid at concentration of 12.47 g/L and its mutant after treatment by UV light increased this productivity to 24.61 g/L. Fermentation was also conducted in a 50 L bioreactor and the productivity reached over 20 g/L. Hence,with a stable and high productive mutant strain,it could be feasible to reuse waste frying oil for rhamnolipid production on industrial scale. 相似文献