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Quantized anomalous Hall resistivity achieved in molecular beam epitaxy-grown Mn Bi2Te4 thin films

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National Science Review 2024年第2期11卷 24-32页

作者： Yunhe Bai Yuanzhao Li Jianli Luan Ruixuan Liu Wenyu Song Yang Chen Peng-Fei Ji qinghua Zhang Fanqi Meng Bingbing Tong Lin Li Yuying Jiang Zongwei Gao Lin Gu Jinsong Zhang Yayu Wang Qi-Kun Xue Ke He Yang feng Xiao feng State Key Laboratory of Low Dimensional Quantum Physics Department of Physics Tsinghua University Institute of Physics Chinese Academy of Sciences School of Materials Science and Engineering Tsinghua University Beijing Academy of Quantum Information Sciences Frontier Science Center for Quantum Information Hefei National Laboratory Southern University of Science and Technology

The intrinsic magnetic topological insulator MnBi2Te4provides a feasible pathway to the high-temperature quantum anomalous Hall（QAH） effect as well as various novel topological quantum phases. Although quantized transport properties have been observed in exfoliated MnBi2Te4thin flakes, it remains a big challenge to achieve molecular beam epitaxy（MBE）-grown MnBi2Te4thin films even close to the quantized regime. In this work, we report the realization of quantized anomalous Hall resistivity in MBE-grown MnBi2Te4thin films with the chemical potential tuned by both controlled in situ oxygen exposure and top gating. We find that elongated post-annealing obviously elevates the temperature to achieve quantization of the Hall resistivity, but also increases the residual longitudinal resistivity, indicating a picture of high-quality QAH puddles weakly coupled by tunnel barriers. These results help to clarify the puzzles in previous experimental studies on MnBi2Te4and to find a way out of the big difficulty in obtaining MnBi2Te4samples showing quantized transport properties.

关键词： intrinsic magnetic topological insulator quantized anomalous Hall resistivity molecular beam epitaxy quantized transport property

《翻译专业本科教学指南》中的翻译技术:内涵、历程与落地

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外语界 2019年第5期 14-20页

作者：赵璧冯庆华上海外国语大学

本文在细读翻译专业本科教育三份纲领性文件--《高等学校翻译专业本科教学要求》、《外国语言文学类教学质量国家标准》以及即将付梓的《翻译专业本科教学指南》(以下简称《教学指南》)的基础上,分析了翻译技术在三份文件中现身、缺席... 详细信息

本文在细读翻译专业本科教育三份纲领性文件--《高等学校翻译专业本科教学要求》、《外国语言文学类教学质量国家标准》以及即将付梓的《翻译专业本科教学指南》(以下简称《教学指南》)的基础上,分析了翻译技术在三份文件中现身、缺席、落地的历程及原因,并重点阐释了《教学指南》中的翻译技术及其意义,以期为翻译专业的翻译技术教学提供建议。

关键词：翻译技术翻译本科专业教学指南国家标准

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许渊冲莎剧汉译情感倾向表征下的译者主体性

外语电化教学 2023年第2期 82-88页

作者：陶小雨冯庆华上海外国语大学上海市200083

许渊冲莎剧汉译研究是许渊冲译者研究的一大空缺。该研究将情感分析与语料库研究方法相结合,探析许渊冲莎剧汉译的情感倾向、总结许渊冲在情感词处理上体现的译者主体性特征,并尝试对相关特征的成因进行解释。研究发现,许渊冲“四大悲... 详细信息

许渊冲莎剧汉译研究是许渊冲译者研究的一大空缺。该研究将情感分析与语料库研究方法相结合,探析许渊冲莎剧汉译的情感倾向、总结许渊冲在情感词处理上体现的译者主体性特征,并尝试对相关特征的成因进行解释。研究发现,许渊冲“四大悲剧”译本情感词丰富,情感极性偏负面,且情感极性强度高于参照译本;在情感词处理上,许译体现出极具特色的译者主体性特征,包括鲜明的时代印记、灵活丰富的四字格、突出的情感强化倾向、创造性的巧妙修辞。这些特征的形成不仅受许渊冲所处的社会历史环境影响,更是译者文化观和翻译观指导翻译实践的结果。

关键词：许渊冲莎剧翻译情感倾向译者主体性译者研究

No Association between p53 Immunohistochemical Staining and RASSF1 or DAPK1 Hypermethylation in Non-Small Cell Lung Cancer

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Journal of Cancer Therapy 2015年第8期6卷 631-637页

作者： Danny V. Colombara David Eidsmoe Joshua E. Stern qinghua feng Hubert Vesselle Stephen E. Hawes Institute for Health Metrics and Evaluation University of Washington Seattle USA Department of Radiology University of Washington Seattle USA Department of Pathology University of Washington Seattle USA Department of Epidemiology University of Washington Seattle USA

p53 mutations have been linked with shortened survival rates in non-small cell lung cancer (NSCLC). Hypermethylation of RASSF1 and DAPK1 genes, which are downstream targets of p53, has also been linked to a poor prognosis in lung cancer patients. We investigated whether p53 mutations, assessed as p53 stabilization by immunohistochemistry (IHC), were independent of DAPK1 and RASSF1 promoter hypermethylation. We examined 103 resected NSCLC tumors for which we had p53 IHC and RASSF1 and DAPK1 methylation data. p53 protein expression was determined by IHC and graded using a semi-quantitative scoring method. DAPK1 and RASSF1 methylations were determined on tumor blocks by MethyLight real-time PCR assays represented as the percent of methylated reference DNA (PMR). Our primary results found no evidence for an association between the p53 IHC score and RASSF1 and DAPK1 PMR values, P = 0.46 and P = 0.68, respectively.

关键词： NSCLC p53 Hypermethylation RASSF1 DAPK1

基于创新人才培养的国家级实验教学示范中心持续建设

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大学化学 2024年第7期39卷 172-179页

作者：沈永雯王薇冯庆华兰景凤陆广农李小龙杨柳徐向阳俞娥吴莉惠新平梁永民化学国家级实验教学示范中心(兰州大学) 兰州730000 兰州大学化学化工学院兰州730000

化学国家级实验教学示范中心(兰州大学)作为兰州大学“双一流”建设化学学科的重要支撑平台,牢记为党育人初心使命,落实立德树人根本任务,以创新人才培养为目标,搭建出优质的实验教学资源共享平台,形成了“基础→综合→科研训练”三层... 详细信息

化学国家级实验教学示范中心(兰州大学)作为兰州大学“双一流”建设化学学科的重要支撑平台,牢记为党育人初心使命,落实立德树人根本任务,以创新人才培养为目标,搭建出优质的实验教学资源共享平台,形成了“基础→综合→科研训练”三层次的实验教学体系。实验教学改革中强化科教融合、以赛促建,培养学生的创新能力,以高水平实验教学支撑了高质量创新型化学拔尖人才的培养,学生的实践和创新能力增强,综合素质优秀。在课程及教材建设、实验教学改革与研究、实验室建设等方面取得了良好进展,示范辐射作用显著。

关键词：实验中心建设创新人才培养实验教学改革与研究实验室建设

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《翻译专业本科教学指南》解读

外语界 2019年第5期 8-13,20页

作者：肖维青冯庆华上海外国语大学

本文阐述了即将付梓的《翻译专业本科教学指南》(以下简称《教学指南》)的研制背景、出台的必要性,分析了《教学指南》与《外国语言文学类教学质量国家标准》的关联和区别,介绍了《教学指南》的框架结构,阐明了《教学指南》的四大特点,... 详细信息

本文阐述了即将付梓的《翻译专业本科教学指南》(以下简称《教学指南》)的研制背景、出台的必要性,分析了《教学指南》与《外国语言文学类教学质量国家标准》的关联和区别,介绍了《教学指南》的框架结构,阐明了《教学指南》的四大特点,以期为我国翻译专业人才培养提供切实可行的指导建议,推动翻译本科专业的内涵式发展。

关键词：翻译本科专业教学指南国家标准教学计划

《翻译专业本科教学指南》中的翻译能力:内涵、要素与培养建议

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外语界 2020年第3期 12-19页

作者：赵朝永冯庆华华东师范大学外语学院上海200241 上海外国语大学英语学院上海200083

翻译能力培养是翻译专业本科教学的核心要务,具有理论与实践的双重意义。本文通过细读《翻译专业本科教学指南》(以下简称《教学指南》)及与之关联的《高等学校翻译专业本科教学要求》和《外国语言文学类教学质量国家标准》等翻译专业... 详细信息

翻译能力培养是翻译专业本科教学的核心要务,具有理论与实践的双重意义。本文通过细读《翻译专业本科教学指南》(以下简称《教学指南》)及与之关联的《高等学校翻译专业本科教学要求》和《外国语言文学类教学质量国家标准》等翻译专业建设纲领性文件,梳理了翻译能力内涵在翻译专业本科人才培养中的演进,重点阐述了《教学指南》中的翻译能力内涵与构成要素,并就翻译专业本科教学中的翻译能力培养提出相关建议。

关键词：翻译本科专业教学指南翻译能力培养建议

Present geotemperature and its suggestion to natural gas generation in Xujiaweizi fault-depression of the northern Songliao Basin

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Science China Earth Sciences 2008年第S1期51卷 207-220页

作者： ZHOU qinghua 1,2 ,feng ZiHui 3 &MEN GuangTian 3 1 Research Institute of Petroleum Exploration and Development,PetroChina,Beijing 100083,China 2 Geological Logging Subcompany of Daqing Oil Field Company Ltd.,Daqing 163411,China 3 Research Institute of Petroleum Exploration and Development of Daqing Oil field Company Ltd.,Daqing 163732,China Research Institute of Petroleum Exploration and Development PetroChina Beijing China Geological Logging Subcompany of Daqing Oil Field Company Ltd. Daqing China Research Institute of Petroleum Exploration and Development of Daqing Oil field Company Ltd. Daqing China

According to stastistic of present geotemperatures at the depths of 1000,2000,3000 and 4000 m,respectively in the Xujiaweizi fault-depression of the north Songliao Basin,the result indicates that Xujiaweizi fault-depression falls in the high geotemperature area,with the higher geothermal gradient in the depression layer than that in the fault-depression *** geothermal gradient decreases with the increasing of the *** thermal conductivity of rock greatly controls the geothermal *** main factors constraining the current geotemperature include thermal configuration of the earth's crust, deep faults,distribution and abundance of *** high geotemperature is in favour of generation of deep gas.

关键词： Xujiaweizi fault-depression geotemperature geothermal gradient thermal conductivity of rock deep layer natural gas

Refractive index sensing based on a twisted nano-kirigami metasurface

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Photonics Research 2024年第2期12卷 218-225页

作者： SHUQI QIAO XIAOCHEN ZHANG qinghua LIANG YANG WANG CHANG-YIN JI XIAOWEI LI LAN JIANG SHUAI feng HONGLIAN GUO JIAFANG LI School of Science Minzu University of ChinaBeijing 100081China Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement(Ministry of Education) Beijing Key Laboratory of Nanophotonics&Ultrafine Optoelectronic Systemsand School of PhysicsBeijing Institute of TechnologyBeijing 100081China Laser Micro/Nano Fabrication Laboratory School of Mechanical EngineeringBeijing Institute of TechnologyBeijing 100081China

Plasmonic sensing technology has attracted considerable attention for high sensitivity due to the ability to effectively localize and manipulate *** this study,we demonstrate a refractive index(RI)sensing scheme based on open-loop twisted meta-molecule arrays using the versatile nano-kirigami *** sensing has the features of a small footprint,flexible control,and simple *** engineering the morphology of meta-molecules or the RI of the ambient medium,the chiral surface lattice resonances can be significantly enhanced,and the wavelength,intensity,and sign of circular dichroism(CD)can be flexibly *** the relation between the wavelength of the CD peak and the RI of the superstrate,the RI sensor achieves a sensitivity of 1133 nm/***,we analyze these chiroptical responses by performing electromagnetic multipolar decomposition and electric field *** study may serve as an ideal platform for applications of RI measurement and provide new insights into the manipulation of chiral light–matter interactions.

关键词： twisted chiral index