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Chinese Journal of Chemistry 2017年第5期35卷 531-540页

作者： Zhifeng Ma wenhong yang Wen-Hua Sun Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China University of Chinese Academy of Sciences Beijing 100049 China

The design and synthesis of transition metal complexes with high thermal stability in olefin polymerization have become more and more important in order to meet the need of industrial *** review focuses on the transition metal complex catalyst with high thermal stability containing different structures,including the backbone of bis（imino）pyridine,a-diimine and other types of *** the catalytic activity,the influence of reaction temperature on the molecular weight and molecular weight distribution of the obtained polymer was also *** plausible mechanism on the stability of catalysts at high temperature was proposed,which may give guidance to design catalyst with good thermal stability.

关键词： thermal stability transition metal complex olefin polymerization homogenous catalysis ligand effects

Suppressing meta-holographic artifacts by laser coherence tuning

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Light(Science & Applications) 2021年第7期10卷 1236-1246页

作者： Yaniv Eliezer Geyang Qu wenhong yang Yujie Wang Hasan Yılmaz Shumin Xiao Qinghai Song Hui Cao Department of Applied Physics Yale UniversityNew HavenCT 06520USA Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System Harbin Institute of Technology(Shenzhen)Shenzhen 518055P.R.China

A metasurface hologram combines fine spatial resolution and large viewing angles with a planar form factor and compact ***,it suffers coherent artifacts originating from electromagnetic cross-talk between closely packed meta-atoms and fabrication defects of nanoscale ***,we introduce an efficient method to suppress all artifacts by fine-tuning the spatial coherence of *** method is implemented with a degenerate cavity laser,which allows a precise and continuous tuning of the spatial coherence over a wide range,with little variation in the emission spectrum and total *** find the optimal degree of spatial coherence to suppress the coherent artifacts of a meta-hologram while maintaining the image *** work paves the way to compact and dynamical holographic displays free of coherent defects.

关键词： holographic coherent illumination

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机器学习在聚烯烃催化剂领域的应用与展望

科学通报 2022年第17期67卷 1870-1880页

作者：杨文泓孙文华中国石油天然气股份有限公司石油化工研究院新材料生物化工研究所北京102206 中国科学院化学研究所北京分子科学国家实验室工程塑料重点实验室北京100190 中国科学院大学化学科学学院北京100049

催化剂是决定聚烯烃的工业效率以及实现聚烯烃高端化的核心.传统开发催化剂的过程采用试错法,不仅实验步骤多、研发周期长,且催化性能的研究需要消耗大量资源.单纯依靠实验的分析方法很难挖掘出催化剂结构与聚合性能之间的内在关系.高... 详细信息

催化剂是决定聚烯烃的工业效率以及实现聚烯烃高端化的核心.传统开发催化剂的过程采用试错法,不仅实验步骤多、研发周期长,且催化性能的研究需要消耗大量资源.单纯依靠实验的分析方法很难挖掘出催化剂结构与聚合性能之间的内在关系.高水平的量子化学计算可以准确地获取反应机理,但针对宏量的实验数据,昂贵的计算成本是其局限.大数据时代,人工智能的发展势不可挡.机器学习作为人工智能的核心策略表现出强大的预测能力,并在科学、技术以及工业等各个领域获得了广泛的应用与发展.本文主要介绍机器学习在聚烯烃催化剂中的最新研究进展,并简要评述机器学习应用于烯烃催化中面临的机遇与挑战.

关键词：聚烯烃催化剂催化性能分子描述符机器学习定量构效

英国公共图书馆少儿分级阅读推广服务研究——以10家英国阅读起跑线计划成员馆为例

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图书馆工作与研究 2020年第11期 103-109页

作者：杨文泓烟台大学图书馆

为对标英国公共图书馆少儿分级阅读推广服务的先进做法,本文以10家英国阅读起跑线计划成员馆为研究样本,对其在分级阅读推广服务主体、标准、内容、载体等方面的成功经验进行案例研究。结果表明,样本馆通过有效聚合多主体分级阅读服务... 详细信息

为对标英国公共图书馆少儿分级阅读推广服务的先进做法,本文以10家英国阅读起跑线计划成员馆为研究样本,对其在分级阅读推广服务主体、标准、内容、载体等方面的成功经验进行案例研究。结果表明,样本馆通过有效聚合多主体分级阅读服务能力、创建统一权威且广受业界认可的分级阅读标准、推送有助于拓宽儿童阅读视野的阅读书单、利用新媒体技术开发智能化分级阅读指导工具,显著增强了分级阅读推广服务效能。以其为蓝本,我国公共图书馆应联合多元主体拓宽分级阅读服务半径,研发与我国少儿阅读推广现状相契合的分级标准,推荐可满足少儿成长需要的高价值读物,打造形式丰富、情境多样的少儿分级阅读服务矩阵,塑造少儿分级阅读推广的差异化核心竞争优势。

关键词：公共图书馆阅读推广分级阅读阅读起跑线少年儿童英国

Progress in Civil Construction of HIAF

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IMP & HIRFL Annual Report 2022年第1期 257-258页

作者： Zhao Xiaoyun Zhou Luncai Qi Xueqin Yu Haiyan Kong Haoran yang wenhong 不详

*** Investment Component of HIAF HIAF civil construction covers about 33025.51 m^(2) in total that are jointly supported by the National investment and local *** actual construction scale of national investment in Hig... 详细信息

关键词： HIAF jointly Intensity

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我国关于档案权利的研究述评

档案与建设 2019年第4期2卷 13-17页

作者：杨文泓高燕烟台大学图书馆山东烟台264000

我国学术界关于档案相关权利的研究虽然起步较晚,但随着经济社会的快速发展,越来越多的学者开始关注和强调公民的"档案权利"问题。当前学界主要围绕权利主体、各类法律法规间的冲突、档案权利及时性进行研究。论文认为档案权利是与档案... 详细信息

我国学术界关于档案相关权利的研究虽然起步较晚,但随着经济社会的快速发展,越来越多的学者开始关注和强调公民的"档案权利"问题。当前学界主要围绕权利主体、各类法律法规间的冲突、档案权利及时性进行研究。论文认为档案权利是与档案相关的一切权利的汇总与集合,其权利主体包括接受档案服务者与提供档案服务者,其存在的目的是为了保障档案价值的有效实现,其本质是对档案合理利用的支持与维护。权力救济是档案权利的完善方式。

关键词：档案法档案权利权利救济

Advanced manufacturing of dielectric metadevices

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Photonics Insights 2024年第2期3卷 31-70页

作者： wenhong yang Junxiao Zhou Din Ping Tsai Shumin Xiao Key Lab of Micro-Nano Optoelectronic Information System Ministry of Industry and Information TechnologyGuangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic SystemsHarbin Institute of TechnologyShenzhenChina Department of Electrical Engineering City University of Hong KongHong KongChina The State Key Laboratory of Terahertz and Millimeter Waves City University of Hong KongHong KongChina Centre for Biosystems Neuroscienceand NanotechnologyCity University of Hong KongHong KongChina Pengcheng Laboratory ShenzhenChina

Metasurfaces,composed of two-dimensional nanostructures,exhibit remarkable capabilities in shaping wavefronts,encompassing phase,amplitude,and *** unique proficiency heralds a transformative paradigm shift in the domain of next-generation optics and photonics,culminating in the development of flat and ultrathin optical *** noteworthy is the all-dielectric-based metasurface,leveraging materials such as titanium dioxide,silicon,gallium arsenide,and silicon nitride,which finds extensive application in the design and implementation of high-performance optical devices,owing to its notable advantages,including a high refractive index,low ohmic loss,and ***,the remarkable growth in nanofabrication technologies allows for the exploration of new methods in metasurface fabrication,especially through wafer-scale nanofabrication technologies,thereby facilitating the realization of commercial applications for *** review provides a comprehensive overview of the latest advancements in state-of-the-art fabrication technologies in dielectric metasurface *** technologies,including standard nanolithography[e.g.,electron beam lithography(EBL)and focused ion beam(FIB)lithography],advanced nanolithography(e.g.,grayscale and scanning probe lithography),and large-scale nanolithography[e.g.,nanoimprint and deep ultraviolet(DUV)lithography],are utilized to fabricate highresolution,high-aspect-ratio,flexible,multilayer,slanted,and wafer-scale all-dielectric metasurfaces with intricate ***,we conclude with a perspective on current cutting-edge nanofabrication technologies.

关键词： dielectric meta-devices meta-optics metasurface nanofabrication nanotechnology nanophotonics large/waferscale nanofabrication

Above-and belowground biomass in relation to envi- ronmental factors in temperate grasslands, Inner Mongolia

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Science China(Life Sciences) 2008年第3期51卷 263-270页

作者： MA wenhong1,2, yang YuanHe1, HE JinSheng1, ZENG Hui1,2 & FANG JingYun1 1 Department of Ecology, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China 2 School of Environment & Urban Study, Peking University Shenzhen Graduate School, Shenzhen 518055, China 1. Department of Ecology College of Urban and Environmental Sciences Peking University Beijing 100871 China 2. School of Environment & Urban Study Peking University Shenzhen Graduate School Shenzhen 518055 China

Above- and belowground biomasses of grasslands are important parameters for characterizing re- gional and global carbon cycles in grassland ecosystems. Compared with the relatively detailed in- formation for aboveground biomass (AGB), belowground biomass (BGB) is poorly reported at the re- gional scales. The present study, based on a total of 113 sampling sites in temperate grassland of the Inner Mongolia, investigated regional distribution patterns of AGB, BGB, vertical distribution of roots, and their relationships with environmental factors. AGB and BGB increased from the southwest to the northeast of the study region. The largest biomass occurred in meadow steppe, with mean AGB and BGB of 196.7 and 1385.2 g/m2, respectively; while the lowest biomass occurred in desert steppe, with an AGB of 56.6 g/m2 and a BGB of 301.0 g/m2. In addition, about 47% of root biomass was distributed in the top 10 cm soil. Further statistical analysis indicated that precipitation was the primary determinant factor in shaping these distribution patterns. Vertical distribution of roots was significantly affected by precipitation, while the effects of soil texture and grassland types were weak.

关键词： temperate grasslands aboveground biomass (AGB) belowground biomass (BGB) spatial pattern vertical distribution precipitation

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儒家美学“仁”范畴之社会化审美价值观

乐山师范学院学报 2013年第10期28卷 106-108页

作者：杨文洪四川师范大学文学院成都610066

就人生美学意义看,"仁"生命域的达成是"人"内在心灵的升华、净化与超越,也是儒家美学所推崇的最高审美域的实现,是人生境域的审美提升,是需要"人"自身本心本性的去蔽与敞亮方能达到自由之境域,个体的人经过长期修养把握了"仁",把"仁"变... 详细信息

就人生美学意义看,"仁"生命域的达成是"人"内在心灵的升华、净化与超越,也是儒家美学所推崇的最高审美域的实现,是人生境域的审美提升,是需要"人"自身本心本性的去蔽与敞亮方能达到自由之境域,个体的人经过长期修养把握了"仁",把"仁"变为自身自然而然的行为——克服和控制情欲,处理好自身与自然、社会、及人之间的复杂关系,感受、体验生命存在之美的意义,即是豁然开朗,也就获得了自由。"仁"是儒家美学思想的核心范畴,同时也是儒家美学的出发点与精义所在,在"仁"的伦理价值中包含着审美价值的内涵。

关键词： “仁” 仁爱成己成物天人一体

用大孔氨甲基聚苯乙烯树脂选择性吸附分离茶多酚和咖啡因

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离子交换与吸附 2007年第6期23卷 481-488页

作者：杨文泓赵长青高杰汤海燕程绍玲阎虎生功能高分子材料教育部重点实验室南开大学高分子化学研究所功能高分子材料教育部重点实验室南开大学高分子化学研究所天津300071

3种市售树脂ADS-5、ADS-8和ADS-17对茶多酚和咖啡因的混合物水溶液的吸附表明,具有弱极性的ADS-8对茶多酚的吸附量最大。随着树脂极性的增加(ADS-5 详细信息

3种市售树脂ADS-5、ADS-8和ADS-17对茶多酚和咖啡因的混合物水溶液的吸附表明,具有弱极性的ADS-8对茶多酚的吸附量最大。随着树脂极性的增加(ADS-5

关键词：吸附树脂疏水作用氢键茶多酚咖啡因