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Comprehensive study of crystalline AlN/sapphire templates after high-temperature annealing with various sputtering conditions

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Journal of Semiconductors 2020年第12期41卷 94-100页

作者： Wen gu Zhibin Liu yanan guo Xiaodong Wang Xiaolong Jia Xingfang Liu Yiping Zeng Junxi Wang Jinmin Li Jianchang Yan Research and Development Center for Solid-State Lighting Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Beijing Engineering Research Center for the 3rd Generation Semiconductor Materials and Application Beijing 100083China Advanced Ultraviolet Optoelectronics Co.Ltd Changzhi 046000China Key Laboratory of Semiconductor Materials Science Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Youwill Hitech Co.Ltd Beijing 100083China

High-quality AlN/sapphire templates were fabricated by the combination of sputtering and high-temperature(HT)*** influence of sputtering parameters including nitrogen flux,radio frequency power,and substrate temperature on the crystalline quality and surface morphology of annealed AlN films were *** lower substrate temperature,lower power,and lower N2 flux,the full width at half maximum of the X-ray rocking curve for AlN(0002)and(102)were improved to 97.2 and 259.2 arcsec after high-temperature *** happens because the increased vacancy concentration of sputtered AlN films can facilitate the annihilation of dislocations by increasing the recovery rate during HT *** and step-bunching morphologies were clearly observed with optimized sputtering conditions.

关键词： sputter annealing AlN dislocation density

Quantitative Analysis of ATP Sulfurylase and Selenocysteine Methyltransferase Gene Expression in Different Organs of Tea Plant (<i>Camellia sinensis</i>)

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American Journal of Plant Sciences 2012年第1期3卷 51-59页

作者： Shaoqiang Tao Juan Li Xungang gu yanan Wang Qiang Xia Bing Qin Lin Zhu 不详

Tea plant (Camellia sinensis) has unique biological features for the study of cellular and molecular mechanisms, an evergreen broad-leaved woody plant which can accumulate selenium in soil abundant of Selenium. Expression of the genes related to Selenium (Se) metabolism is an adaptation to the soil environment for a long period. The purpose of the present study was to explore if there exist differences of expression about these genes in tea plant between growing in Selenium-abundant and normal soil. A quantitative real-time reverse transcription polymerase chain reaction (Q-RT-PCR) assay was done for quantification of ATP sulfurylase (APS) and selenocysteine methyltransferase (SMT) mRNA normalized to Glyceraldehyde-3-phosphate dehydrogenase (GAPDH) gene in tea plant. Young leaves, mature leaves and tender roots from tea plants growing in soil abundant of Selenium were respectively obtained from Shitai County, Anhui Province, and also the relevant materials of the selenium un-enriched tea plant planted at agricultural garden of Ahui Agriculture University were taken as control for real-time PCR analysis. The results showed that APS1, APS2 and SMT expression levels for either young or mature leaves in selenium-enriched tea plant were lower than that in ordinary (selenium un-enriched) tea plant. In contrast, the APS1, APS2 and SMT expression level of roots in selenium-enriched tea plant were all higher than that in ordinary tea plant. APS1 gene expression level of roots in selenium-enriched tea plant was about 1.6 times higher than that in the ordinary tea plant, APS2 gene expression level was about 4.8-fold higher than that in the ordinary tea plant, SMT gene expression level was about 3.3 times higher than that in the ordinary tea plant. Among various tissues of selenium-enriched tea plant, APS1 gene relative expression level of young leaves was similar to or slightly higher than mature leaves, and the one of roots was the lowest among them;APS2 gene relative express

关键词： Quantitative Real-Time Polymerase Chain Reaction ATP Sulfurylase Selenocysteine Methyltransferase Tea Plant (Camellia sinensis)

基于列斯特评估量表的基层全科医生应诊能力评价指标体系构建研究

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中国全科医学 2024年第4期27卷 468-475页

作者：顾劲梅覃丽赵璨彭厚瑄奚谦申颖广西医科大学第一附属医院全科医学科广西壮族自治区南宁市530021 广西壮族自治区南宁市西乡塘区坛洛中心卫生院 530041 广西壮族自治区南宁市马山县周鹿中心卫生院 530603 广西壮族自治区南宁市江南区延安镇卫生院 530229 广西医科大学全科医学院广西壮族自治区南宁市530021

背景大力培养全科医生和提升以全科医生为核心的基层医疗卫生队伍执业能力是我国基层卫生人力资源发展的重要方向。目前,我国缺乏适用于基层执业环境测评全科医生临床能力的指标体系,阻碍了准确鉴定全科医生临床能力缺口,不利于持续改... 详细信息

背景大力培养全科医生和提升以全科医生为核心的基层医疗卫生队伍执业能力是我国基层卫生人力资源发展的重要方向。目前,我国缺乏适用于基层执业环境测评全科医生临床能力的指标体系,阻碍了准确鉴定全科医生临床能力缺口,不利于持续改善全科医生及基层医疗卫生队伍的教育培训工作。目的基于经典列斯特评估量表(LAP)构建适用于我国基层医疗执业环境的全科医生应诊能力评价指标体系,为客观评价基层全科医生临床能力提供指标模型参考。方法于2022年5—8月,采用目的抽样法,邀请15名专家以函询的方式实施德尔菲法,评价初始基层全科医生应诊能力评价指标体系中各指标的重要性、可行性等。运用层次分析法计算指标体系中各一级指标和二级指标的权重及组合权重。结果共计实施2轮专家咨询,专家积极系数、熟悉程度、判断系数、权威系数在两轮咨询中均为100%、0.77、0.91、0.84;各指标重要性及可行性评分均数均>3.5分,变异系数均<0.3,两轮咨询中指标重要性及可行性的专家肯德尔系数均有统计学意义(P<0.001),且第2轮高于第1轮;专家咨询共计提出10条新增指标类意见、1条合并指标类意见、29条修改指标表述类意见。经两轮德尔菲法修订,最终构建的指标体系共计含7个一级指标和42个二级指标。指标体系中,7个一级指标的权重为13.61%~14.69%,二级指标的组合权重为0.95%~4.91%。结论本研究基于经典LAP,构建了适用于我国基层医疗环境的全科医生应诊能力评价指标体系。指标体系包括7个一级指标和42个二级指标,内容覆盖全科医生应诊工作的各主要环节和重点任务,具备较高的科学性和实用性。

关键词：全科医生应诊能力层次分析法评价指标体系列斯特评估量表

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螺旋管内单相流动周向非均匀传热现象的数值模拟

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上海交通大学学报 2020年第7期54卷 688-696页

作者：王瑞肖瑶顾汉洋叶亚楠上海交通大学核科学与工程学院上海200240

采用Reynolds应力模型针对螺旋管内的单相流动周向非均匀传热现象开展数值模拟研究.基于与螺旋管传热实验数据的对比,验证该数值计算的正确性.研究发现:螺旋管周向传热分布随着重力加速度与离心力加速度之比(?)的变化而变化.导致这种现... 详细信息

采用Reynolds应力模型针对螺旋管内的单相流动周向非均匀传热现象开展数值模拟研究.基于与螺旋管传热实验数据的对比,验证该数值计算的正确性.研究发现:螺旋管周向传热分布随着重力加速度与离心力加速度之比(?)的变化而变化.导致这种现象的原因可能是螺旋管周向传热分布受离心力和重力的共同作用,?的变化引起了合力方向的变化,进而影响了螺旋管的周向传热分布;?是影响螺旋管单相流动周向传热分布的主要因素;分析总结管壁周向温度分布随加速度比、螺旋直径、螺旋升角、螺旋管水力学直径等参数的变化规律及其成因.

关键词：螺旋管单相传热周向非均匀传热离心力计算流体力学

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肠道菌群对肺癌影响的研究进展

中国肿瘤临床 2021年第17期48卷 910-913页

作者：王娅楠(综述) 顾岩(审校) 内蒙古医科大学呼呼浩特市010110 内蒙古医科大学附属医院呼吸与危重症医学科

人体肠道内寄生着约十万亿个由500~1000不同种类组成的细菌,影响着人体消化和吸收功能、抵御感染和自身免疫疾病的患病风险,还参与药物代谢过程。肺癌的发病率和死亡率快速增长,是对人类生命威胁较大的恶性肿瘤。肠道菌群可能通过代谢... 详细信息

人体肠道内寄生着约十万亿个由500~1000不同种类组成的细菌,影响着人体消化和吸收功能、抵御感染和自身免疫疾病的患病风险,还参与药物代谢过程。肺癌的发病率和死亡率快速增长,是对人类生命威胁较大的恶性肿瘤。肠道菌群可能通过代谢或免疫等途径影响肺癌的发生,同时影响肺癌对放化疗、免疫治疗等治疗方法的疗效,但不同患者获益不一。肠道菌群在恶性肿瘤的发生、发展、诊断、治疗中的作用已成为近年来的研究热点,本研究对肠道菌群和肺癌的相关性研究进展进行综述。

关键词：肠道菌群肺癌诊断治疗免疫

High-Efficiency and Low-Energy-Loss Organic Solar Cells Enabled by Tuning Conformations of Dimeric Electron Acceptors

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CCS Chemistry 2023年第11期5卷 2576-2588页

作者： Xiaobin gu yanan Wei Na Yu Jiawei Qiao Ziyang Han Qijie Lin Xiao Han Jinhua Gao Congqi Li Jianqi Zhang Xiaotao Hao Zhixiang Wei Zheng Tang Yunhao Cai Xin Zhang Hui Huang College of Materials Science and Opto-Electronic Technology Center of Materials Science and Optoelectronics EngineeringCAS Center for Excellence in Topological Quantum ComputationCAS Key Laboratory of Vacuum PhysicsUniversity of Chinese Academy of SciencesBeijing 100049 Center for Advanced Low-Dimension Materials State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai 201620 School of Physics State Key Laboratory of Crystal MaterialsShandong UniversityJinan 250100 Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190

Dimeric fused-ring electron acceptors(DFREAs)have attracted much attention due to the combined advantages of their monomeric and polymeric acceptors,including a well-defined molecular structure,excellent repeatability,and stable ***,the additionally introduced single-bonds during dimerization may result in a twisted backbone of DFREAs,which is detrimental to intermolecular packing and charge ***,three DFREAs are designed and synthesized,in which DFREA conformations were systematically tuned via adjusting the intensities of intramolecular noncovalent interactions(INIs)to achieve high-performance organic solar cells(OSCs).Theoretical and experimental results show that the gradual introduction of S…F INIs can continuously improve molecular planarity and rigidity,resulting in reduced reorganization energies,ordered packing mode,and enhanced crystallization of *** from the incorporation of fourfold S…F INIs,DYF-TF-based binary OSCs show a record high efficiency of 18.26%with an extremely low energy loss(0.493 eV)for DFREAbased *** addition,DYF-TF-based OSCs exhibited good long-term stability with a T_(80%)lifetime of 2681 h,and the power conversion efficiency of the DYF-TF-based ternary device is further enhanced to 18.73%.This contribution demonstrates the great potential of the INIs strategy in achieving excellent DFREAs materials.

关键词： organic solar cells dimeric fused-ring electron acceptors intramolecular noncovalent interactions molecular planarity and rigidity reorganization energies

轿车动力总成悬置系统匹配设计方案优选与分析方法

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汽车工程 2011年第7期33卷 574-580,597页

作者：顾名坤吕振华王亚楠清华大学汽车工程系汽车安全与节能国家重点实验室北京100084

本文中对一种带一个抗侧倾控制臂三点式轿车动力总成悬置系统进行振动特性的分析及其匹配设计的研究。对其7自由度振动模型的固有振动特性分析结果表明,第7阶振动模态对悬置系统传递的动态力影响很小,故在进行此类悬置系统的匹配设计时... 详细信息

本文中对一种带一个抗侧倾控制臂三点式轿车动力总成悬置系统进行振动特性的分析及其匹配设计的研究。对其7自由度振动模型的固有振动特性分析结果表明,第7阶振动模态对悬置系统传递的动态力影响很小,故在进行此类悬置系统的匹配设计时,一般可不考虑频率相对很高的第7阶振动模态。采用一种简明、实用的多方案设计优选方法,较快地得出了振动模态频率配置合理、主要模态振动的多自由度解耦率高的悬置系统匹配设计方案,通过其受迫振动分析验证了优选悬置系统隔振性能的改进效果。

关键词：动力总成隔振悬置系统匹配设计模态频率配置模态振动解耦

成年人工耳蜗植入者音乐感知欣赏水平评估的研究进展

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中华耳鼻咽喉头颈外科杂志 2023年第3期58卷 274-278页

作者：兰亚男古鑫刘博首都医科大学附属北京同仁医院耳鼻咽喉头颈外科、北京市耳鼻咽喉科研究所、耳鼻咽喉头颈科学教育部重点实验室(首都医科大学) 北京100005

人工耳蜗植入者在安静环境下可达到较好的言语辨识水平,但音乐聆听的体验并不理想。纵观国内外音乐测试评估系统的发展,本文着眼于人工耳蜗植入者音乐客观感知能力与主观欣赏水平的评价方法,对主要的测试系统、评估方法、核心结论进行... 详细信息

人工耳蜗植入者在安静环境下可达到较好的言语辨识水平,但音乐聆听的体验并不理想。纵观国内外音乐测试评估系统的发展,本文着眼于人工耳蜗植入者音乐客观感知能力与主观欣赏水平的评价方法,对主要的测试系统、评估方法、核心结论进行整理分析,为开发符合我国文化背景的音乐评估系统提供参考。

关键词：欣赏水平人工耳蜗植入水平评估评估系统整理分析评价方法测试系统感知能力

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C2C二手交易平台动态定价行为研究

系统工程理论与实践 2021年第5期41卷 1150-1161页

作者：谷炜于晓茹李晴宋亚楠闫相斌北京科技大学经济管理学院北京100083

如何快速达成交易、提高商品流转效率是customer-to-customer(C2C)二手交易平台运营问题的关键.基于此,本文针对个人卖家的非专业性及二手商品特性,构建了双期定价决策模型.通过模型分析,提出了影响个人卖家定价及调价决策的相关假设,... 详细信息

如何快速达成交易、提高商品流转效率是customer-to-customer(C2C)二手交易平台运营问题的关键.基于此,本文针对个人卖家的非专业性及二手商品特性,构建了双期定价决策模型.通过模型分析,提出了影响个人卖家定价及调价决策的相关假设,并利用闲鱼平台的交易数据进行实证分析.结果表明:定价和调价决策与新品价格正相关,调价决策与转售价格正相关;调价方向(涨价或降价)与转售价格、新品价格和浏览量相关;涨价幅度与转售价格负相关,降价幅度与转售价格正相关;考虑商品异质性,时间敏感度不同的商品在调价幅度上未完全呈现出预期的显著差异.本文将定价模型和实证研究相结合,分析了个人卖家动态定价行为,为优化定价策略、实现商品高效流转提出了相关建议.

关键词： customer-to-customer(C2C) 个人卖家动态定价二手交易