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Hot electron assisted photoelectrochemical water splitting from Audecorated ZnO@TiO_(2) nanorods array

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Nano Research 2022年第7期15卷 5824-5830页

作者： Hongdong Li hongyan liu Fei Wang Guodong Li Xiaoli Wang Zhiyong Tang CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Key Laboratory of Eco-chemical Engineering College of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042China Beijing Institute of Aeronautical Materials Beijing 100095China

Engineering of semiconductor nanomaterials is critical to enhance the photoelectrochemical(PEC)performance for water ***,semiconductors often show the low light absorption,slow charge transfer,and easy recombination of carriers,thus leading to the low catalytic *** this work,we show facile synthesis of ZnO@TiO_(2) core–shell nanorods(NRs)arrays modified with Au nanoparticles(NPs)as the photoelectrode for PEC water ***,the obtained ZnO@TiO_(2)(15 nm)/Au(8 nm)array shows the maximum photocurrent density of 3.14 mA/cm^(2) at 1.2 V *** hydrogen electrode(RHE),2.6 times and 1.7 times higher than those obtained from ZnO NRs and ZnO@TiO_(2)(15 nm)*** electric-field simulation and transient absorption spectroscopy show that the Au-decorated core–shell nanostructures have an enhanced hot electron generation and prolonged decay time,indicating effective charge transfer and recombination inhibition of *** work provides an efficient preparation strategy for photoelectrodes as well as great potential for the large-scale development of this technology.

关键词： surface plasmon resonance energy transfer transient absorption hot electron water splitting

NEURO-COGNITIVE MECHANISMS UNDERLYING THE EMOTIONAL MODULATION OF WORD READING

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Chinese Science Bulletin 2006年第4期51卷 377-384页

作者： PENG Danling HU Zhiguo liu hongyan liu Conghui DING Guosheng State Key Lab of Cognitive Neuroscience and Learning Beijing Normal University Beijing 100875 China

A novel neural model for emotional modulation of word reading is proposed. This model has four principal hypotheses: the dominant activa-tion region hypothesis, the emotional modulation hypothesis, the attentional level hypothesis, and the interaction hypothesis. Four lines of research were reviewed to provide evidence for these hypotheses: (1) neuro-cognitive studies on the mechanisms of word reading (i.e., neural networks for reading); (2) studies on the influence of words’ emotional valence on word reading; (3) studies of the effect of attention on word reading; and (4) studies on emotional modulation of word reading under different attentional levels.

关键词：文字阅读情绪调节认知机制神经模型注意力

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舌体形态位置对颌骨宽度影响的研究进展

大连医科大学学报 2024年第2期46卷 167-170,176页

作者：张赫言刘红彦张言春大连医科大学附属第一医院口腔科辽宁大连116011 大连市妇女儿童医疗中心(集团)口腔科辽宁大连116011

颌骨在三维方向生长停止的时间有一定顺序,宽度生长最先停止,而颌骨的宽度不调可能会继发矢状向和垂直向的不调。影响上下颌骨宽度不调的因素众多,舌体形态和位置是其中的影响因素之一。对于乳牙期、替牙期或年轻恒牙阶段存在舌位不良... 详细信息

颌骨在三维方向生长停止的时间有一定顺序,宽度生长最先停止,而颌骨的宽度不调可能会继发矢状向和垂直向的不调。影响上下颌骨宽度不调的因素众多,舌体形态和位置是其中的影响因素之一。对于乳牙期、替牙期或年轻恒牙阶段存在舌位不良的患者,舌肌训练可以促进上颌骨发育,增加牙列的宽度,从而减轻错畸形的程度;对于舌位及舌体形态异常的成年患者,正确的舌位及舌形态能够维持口周软组织的力量平衡,有利于正畸治疗后效果的稳定。本文就舌的发育过程、舌体形态位置对颌骨宽度的影响以及相应的治疗方法进行综述,为临床解决颌骨宽度不足提供参考。

关键词：舌体形态舌体位置颌骨宽度

八段锦改善围绝经期综合征伴抑郁症状的Meta分析

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中国中医药现代远程教育 2024年第9期22卷 102-105页

作者：刘宏艳毛浩萍付姝菲天津中医药大学中医学院天津301617

目的评价八段锦改善围绝经期综合征伴抑郁症状的疗效。方法检索中英文数据库中关于八段锦改善围绝经期综合征伴抑郁症状疗效的随机对照试验(RCT),使用Revman 5.4.1进行Meta分析。结果纳入文献5篇,方法学质量中等偏上。Meta分析显示:试... 详细信息

目的评价八段锦改善围绝经期综合征伴抑郁症状的疗效。方法检索中英文数据库中关于八段锦改善围绝经期综合征伴抑郁症状疗效的随机对照试验(RCT),使用Revman 5.4.1进行Meta分析。结果纳入文献5篇,方法学质量中等偏上。Meta分析显示:试验组抑郁自评量表(SDS)及流行病学研究中心抑郁量表(CES-D)评分均低于对照组,差异均有统计学意义(P<0.001);试验组Kupperman评分低于对照组,差异有统计学意义(P<0.001),为排除其高异质性原因,剔除一项研究后,差异仍有统计学意义(P<0.001)。纳入文献均未提到不良反应。结论八段锦对改善围绝经期综合征伴抑郁症状起到积极作用,但仍需更多高质量研究支持该结论。

关键词：八段锦围绝经期抑郁 Meta分析

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激光在钛制压力容器焊前清理上的应用

电焊机 2024年第6期54卷 74-79页

作者：刘鸿彦李卫华孙修圣南京宝色股份公司技术中心江苏南京211178

焊前清理是钛制压力容器制造过程中必不可少的关键步骤。采用激光清理技术对钛制压力容器的换热管与管板焊接接头进行了空间型结构的焊前清理试验,并对比了激光与常规打磨或丙酮清洗的传统焊前清理方式对焊接气孔产生及热影响区的影响... 详细信息

焊前清理是钛制压力容器制造过程中必不可少的关键步骤。采用激光清理技术对钛制压力容器的换热管与管板焊接接头进行了空间型结构的焊前清理试验,并对比了激光与常规打磨或丙酮清洗的传统焊前清理方式对焊接气孔产生及热影响区的影响。结果表明,激光清理方式对空间型结构的具有较高的可达性,对钛试板坡口的焊前清理效果优异,能够有效去除钛材表面的油脂、氧化物等污染物,显著降低焊接气孔的产生倾向,并可以抑制焊接接头热影响区“黑眼圈”的产生;焊后外观颜色与未处理区域相比,色差极小,几乎不影响焊缝外观;激光清理试样的抗拉强度分别为498 MPa和515 MPa,均高于GB/T3621—2007标准规定的400 MPa的最小抗拉强度要求。试验研究表明,激光清理工艺可以代替打磨、金属磨头刮擦、丙酮清洗等传统清理方式,为钛制压力容器的制造提供了一种高效、环保的新技术途径。

关键词：激光清理纯钛TA2 焊前清理压力容器

Tree-ring based PDSI reconstruction since AD 1842 in the Ortindag Sand Land,east Inner Mongolia

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Chinese Science Bulletin 2007年第19期52卷 2715-2721页

作者： LIANG ErYuan SHAO XueMei liu hongyan ECKSTEIN Dieter Institute of Tibetan Plateau Research Chinese Academy of Sciences Beijing 100085 China Institute of Geographic Science and Natural Resource Research Chinese Academy of Sciences Beijing 100101 China College of Environmental Science Peking University Beijing 100871 China Department of Wood Science University of Hamburg Hamburg D-21031 Germany

epartment of Wood Science, University of Hamburg, Hamburg D-21031, GermanyBased on three Chinese pine (Pinus tabulaeformis Carr.) and one Meyer spruce (Picea meyeri Rehd. et Wils.) ring-width chronologies, a 163-year drought history was reconstructed in the eastern Ortindag Sand Land. All tree-ring chronologies show large inter-annual variations and strong common signals and fairly consistent variation between different chronologies, indicating that they are excellent proxy of regional climate. A regional chronology (RC) was established by averaging the four standard chronologies and further employed for the analysis and climatic reconstruction. The analysis revealed that tree growth is primarily limited by low precipitation in February-March and June-July and high temperature in May-July. In addition, RC has high correlations with the monthly Palmer drought severity index (PDSI) prior to and during the growing season because the PDSI considers the accumulation of the droughts. Response function analysis revealed that RC only exhibits significant correlations with the PDSI in June and July (close to the 95% significance level in May). Because May―July is a critical period for tree growth, the average May-July PDSI (PDSI5-7) was reconstructed back to 1842 using RC in the Ortindag Sand Land. The reconstruction can explain 52% of the PDSI variance and the equation was rather stable over time. It agrees well with the variation of the average dryness/wetness indices in North China,and captures the decline process of the East Asian summer monsoon since the mid-1960s. It is worth noting that the Ortindag Sand Land has experienced the most severe drought in the recent 40 years based on the 163-year drought reconstruction. Like summer precipitation in North China the reconstructed PDSI5-7 also displays a 20-year oscillation.

关键词：干旱沙地环境地质

Artemisia pollen-indicated steppe distribution in southern China during the Last Glacial Maximum

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Journal of Palaeogeography 2013年第3期2卷 297-305页

作者： liu hongyan liu Kan Wei Fangling Department of Ecology and Ministry of Education Key Laboratory of Earth Surface Processes College of Urban and Environmental SciencesPeking University

The Last Glacial Maximum (LGM) was the coldest period during the previous 20,000 *** have been different points of views on steppe distribution during the LGM period in southern China,partly due to the different interpretations of Artemisia *** make a reliable interpretation of the pollen fossil Artemisia,the modern distribution of Artemisia species and the relationship of pollen with climate and vegetation over a large spatial scale in China was thoroughly *** about Artemisia species and pollen distributions used in this paper were collected from published works completed by other researchers as well as *** southern limit of steppe vegetation during the LGM period was interpreted from the published contour map of Artemisia pollen percentages during the *** species in China are mostly distributed either in the horizontally distributed steppe regions or in the vertically distributed desert-steppe in the desert region,which indicates a cold and dry *** steppe is a distribution center of Artemisia *** of Artemisia in surface pollen assemblages are lower in both the desert and the temperate *** high Artemisia species cover nor high percentages of Artemisia pollen were found in the coast areas of ***-five percent of Artemisia pollen in sediments might indicate a local occurrence of steppe *** of Artemisia pollen in the subtropical and tropical forest are less than 10%.A close relationship between Artemisia pollen and temperate steppe in China is *** southern edge of the steppe vegetation during the LGM might be along the middle reach of the Yangtze *** results support the hypothesis that the isolated high fraction of Artemisia pollen along the northern edge of the South China Sea was transported from a large source area.

关键词： pollen steppe Artemisia Last Glacial Maximum LGM South China Sea

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高频铜箔的专利技术分析

河南科技 2024年第12期51卷 136-139页

作者：姚日英刘红艳陈刚国家知识产权局专利局专利审查协作江苏中心江苏苏州215011

【目的】重点分析高频铜箔的技术,对其申请状况、技术发展脉络和研发路线进行剖析,以掌握高频铜箔专利技术的发展情况。【方法】通过专利分析,重点研究高频铜箔专利申请的变化趋势、申请人区域分布、申请人排名、专利申请的技术构成等... 详细信息

【目的】重点分析高频铜箔的技术,对其申请状况、技术发展脉络和研发路线进行剖析,以掌握高频铜箔专利技术的发展情况。【方法】通过专利分析,重点研究高频铜箔专利申请的变化趋势、申请人区域分布、申请人排名、专利申请的技术构成等。【结果】日本、中国、美国、韩国是高频覆铜板铜箔专利申请的主要来源国/地区。【结论】在高频铜箔领域,日本专利储备丰富,占据了绝对优势,我国目前和未来潜在的专利障碍较大。中国龙头企业则是后来者居上,近年来得益于5G技术的发展和庞大的中国市场,在国际竞争中表现活跃。

关键词：高频铜箔 PCB 专利申请技术分析

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6种种衣剂防治芝麻枯萎病效果初步研究

植物保护 2024年第4期50卷 362-367页

作者：赵新贝倪云霞刘新涛赵辉何碧珀闫文庆申桐王婧刘红彦河南省农业科学院植物保护研究所农业农村部华北南部作物有害生物综合治理重点实验室河南省农作物病虫害防治重点实验室郑州450003

种衣剂处理是防治由土壤、种子带菌引起的作物苗期枯萎病的有效手段。本研究分别采用培养皿培养和盆栽试验评估6种种衣剂防治芝麻枯萎病的效果。结果表明:使用培养皿培养法筛选芝麻种衣剂可行,与盆栽试验相比,培养皿方法简单快速。盆栽... 详细信息

种衣剂处理是防治由土壤、种子带菌引起的作物苗期枯萎病的有效手段。本研究分别采用培养皿培养和盆栽试验评估6种种衣剂防治芝麻枯萎病的效果。结果表明:使用培养皿培养法筛选芝麻种衣剂可行,与盆栽试验相比,培养皿方法简单快速。盆栽试验结果表明,6种种衣剂中防治效果最好的为15%多·福FSC,其次为30 g/L苯醚甲环唑FSC和25%噻虫·咯·霜灵FSC。15%多·福FSC的防治效果在播种后15 d达97%,播种后45 d仍在50%以上。15%多·福FSC、30 g/L苯醚甲环唑FSC和25%噻虫·咯·霜灵FSC包衣的最佳用量分别为11.11、7.50 mL/kg和30 mL/kg。本研究为芝麻种衣剂的初筛提供了简单快速的方法,并筛选出3种防效良好的种衣剂。

关键词：芝麻枯萎病种衣剂皿内培养法

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