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Photoexcited Blueshift and Redshift Switchable Metamaterial Absorber at Terahertz Frequencies

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Chinese Physics Letters 2019年第12期36卷 28-31页

作者： Zong-Cheng Xu Liang wu ya-ting Zhang De-Gang Xu Jian-quan yao Department of Physics Tianjin University Renai CollegeTianjin 301636 Institute of Laser and Opto-electronics and Key Laboratory of Opto-electronies Information Science and Technology(Ministry of Education) Tianjin UniversityTianjin 300072

We propose a design and numerical study of an optically blueshift and redshift switchable metamaterial(MM)absorber in the terahertz *** MM absorber comprises a periodic array of metallic split-ring resonators(SRRs)with semiconductor silicon embedded in the gaps of MM *** absorptive frequencies of the MM can be shifted by applying an external pump *** simulation results show that,for photoconductivity of silicon ranging between 1 S/m and 4000 S/m,the resonance peak of the absorption spectra shifts to higher frequencies,from 0.67 THz to 1.63 THz,with a resonance tuning range of 59%.As the conductivity of silicon increases,the resonance frequencies of the MM absorber are continuously tuned from 1.60 THz to 1.16 THz,a redshift tuning range of 28%.As the conductivity increases above 30000 S/m,the resonance frequencies tend to be stable while the absorption peak has a merely tiny *** optical-tuned absorber has potential applications as a terahertz modulator or switch.

关键词： tuning modulator pump

Numerical Prediction of Compound Layer Growth of Steel En40B during Plasma Nitriding

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材料热处理学报 2004年第05B期25卷 776-778页

作者： DAIya-nan yaNMu-fu LEIting-quan wuKun SchoolofMaterialsScienceandEngineering HarbinInstituteofTechnologyHarbinChina

This paper deals with the kinetics of compound layer growth of steel En40B plasmas nitrided at 520°C for different time and establishes the corresponding mathematical model based on the thermodynamics and kinetics of nitrogen diffusion process. The results show that the compound layer consists of dual phases e (Fe2-3N) and / (Fe4N) and its thickness increases with increasing nitriding time. The calculated data indicate that the critical concentration between compound layer and diffusion one is about 0.82wt%. The computer simulation results demonstrate that predicted compound layer thickness agrees with the measured data.

关键词：等离子渗氮 En40B钢化合层计算机模拟

Adaptive responses drive the success of polyploid yellowcresses(Rorippa,Brassicaceae)in the Hengduan Mountains,a temperate biodiversity hotspot

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Plant Diversity 2022年第5期44卷 455-467页

作者： ting-Shen Han Zheng-yan Hu Zhi-Qiang Du quan-Jing Zheng Jia Liu Thomas Mitchell-Olds yao-wu Xing CAS Key Laboratory of Tropical Forest Ecology Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMenglaYunnan 666303China Center of Plant Ecology Core Botanical GardensChinese Academy of SciencesMenglaYunnan 666303China Department of Biology Duke UniversityBox 90338DurhamNC 27708USA University of Chinese Academy of Sciences Beijing 100049China

Polyploids contribute substantially to plant evolution and biodiversity;however,the mechanisms by which they succeed are still *** to the polyploid adaptation hypothesis,successful polyploids spread by repeated adaptive responses to new ***,we tested this hypothesis using two tetraploid yellowcresses(Rorippa),the endemic Rorippa elata and the widespread Rorippa palustris,in the temperate biodiversity hotspot of the Hengduan *** modes were resolved by phylogenetic modeling using 12 low-copy nuclear *** patterns were then examined using haplotypes phased from four plastid and ITS markers,coupled with historical niche reconstruction by ecological niche *** inferred the time of hybrid origins for both species as the mid-Pleistocene,with shared glacial refugia within the southern Hengduan *** and ecological niche reconstruction indicated recurrent northward colonization by both species after speciation,possibly tracking denuded habitats created by glacial retreat during interglacial *** garden experiment involving perennial *** conducted over two years revealed significant changes in fitness-related traits across source latitudes or altitudes,including latitudinal increases in survival rate and compactness of plant architecture,suggesting gradual adaptation during range *** findings support the polyploid adaptation hypothesis and suggest that the spread of polyploids was aided by adaptive responses to environmental changes during the *** results thus provide insight into the evolutionary success of polyploids in high-altitude environments.

关键词： Adaptation Hengduan mountains Pleistocene Polyploidy Rorippa

Metabolomic Profiling of Mice Exposed toα-amanitin Using Ultra-performance Liquid Chromatography Quadrupole Time-of-flight Tandem Mass Spectrometry

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Biomedical and Environmental Sciences 2023年第3期36卷 289-294页

作者： LI Lei ZHENG Chong YE Jian Fang ZHU Kai ZHOU Yi Bing LIU Jia GAO Ming wu Yu Tian LIU Yong ting LIU Li ya LIN Ye LI Hai Chang ZHANG quan GUO Hua Clinical Laboratory Guizhou Provincial Center for Disease Control and PreventionGuiyang 550004GuizhouChina Clinical Laboratory Guiyang Provincial Center for Disease Control and PreventionGuiyang 550002GuizhouChina

Numerous instances of poisoning caused by the ingestion of mushrooms are reported annually worldwide,with most mushroom poisoning deaths caused by the ingestion of toxic amanita *** is the main toxic component of aman... 详细信息

关键词： Metab ani annually

An easily-prepared impedance matched Josephson parametric amplifier

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Chinese Physics B 2021年第6期30卷 48-51页

作者： ya-Peng Lu quan Zuo Jia-Zheng Pan Jun-Liang Jiang Xing-Yu Wei Zi-Shuo Li Wen-Qu Xu Kai-Xuan Zhang ting-ting Guo Shuo Wang Chun-Hai Cao Wei-Wei Xu Guo-Zhu Sun Pei-Heng wu Research Institute of Superconductor Electronics School of Electronic Science and EngineeringNanjing UniversityNanjing 210093China Purple Mountain Laboratories Nanjing 211111China

An impedance matched parametric amplifier(IMPA)with Josephson junctions is fabricated and characterized.A hybrid structure containing coplanar and strip structures is implemented to realize an impedance taper line and a plate capacitor in an LC nonlinear resonator based on Josephson *** upper plate of the capacitor is isolated with SiNx without grounding as well as the *** easily-prepared designs greatly reduce the requirements for lithography alignment and precision,which makes the fabrication process more *** experimental results show that in such IMPA a gain higher than 25 dB with a bandwidth of about 100 MHz can be *** broadband amplifier operates close to the quantum *** adjusting the working point,a higher bandwidth of about 400 MHz can be obtained with a gain of about 17 dB.

关键词： Josephson junction parametric amplification impedance matching gain and bandwidth

HR^(+)/HER2^(-)乳腺癌新辅助化疗疗效与影响因素分析

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中国临床研究 2021年第7期34卷 881-885页

作者：吴玉婷朱娅左怀全西南医科大学附属医院四川省妇科与乳腺疾病中心四川泸州646000

目的探讨激素受体阳性/人类表皮生长因子受体2阴性(HR^(+)/HER2^(-))乳腺癌新辅助化疗(NAC)疗效及相关影响因素,为临床制定个体化治疗决策提供参考。方法采用回顾性分析法,收集131例西南医科大学附属医院乳腺外科2015年至2019年初治行NA... 详细信息

目的探讨激素受体阳性/人类表皮生长因子受体2阴性(HR^(+)/HER2^(-))乳腺癌新辅助化疗(NAC)疗效及相关影响因素,为临床制定个体化治疗决策提供参考。方法采用回顾性分析法,收集131例西南医科大学附属医院乳腺外科2015年至2019年初治行NAC的HR^(+)/HER2^(-)乳腺癌患者的临床病理资料,运用秩和检验和χ~2检验分析不同年龄、组织学分级、肿瘤大小、淋巴结状态、雌激素受体(ER)、孕激素受体(PR)、Ki-67表达程度、化疗方案及化疗周期与疗效的关系,用二分类Logistic回归模型分析疗效的影响因素,用ROC曲线计算出相关因素的最佳截断值,Kappa检验分析Miller-Payne分级与RECIST分级的一致性。结果本研究中131例NAC患者中达病理完全缓解(pCR)率为3.6%,有效率为63.4%;多因素分析结果显示,ER高表达(OR=1.048,P<0.01)、Ki-67低表达(OR=0.935,P<0.01)、化疗周期少(OR=0.426,P<0.05)为NAC疗效的独立危险因素;ROC曲线显示,ER、Ki-67表达和化疗周期预测NAC疗效的曲线下面积分别为0.774、0.780、0.821,最佳截断值分别为65.0%、22.5%和6周期;一致性检验提示,Miller-Payne分级与RECIST分级一致性较差(Kappa=0.335)。结论 HR^(+)/HER2^(-)乳腺癌NAC的pCR率低,其中ER、Ki-67、化疗周期为NAC疗效的独立影响因素,ER≥65.0%、Ki-67≤22.5%、化疗周期≤6个时,NAC出现疗效较差可能性大,NAC后Miller-Payne分级与RECIST分级一致性较差。

关键词：激素受体阳性人类表皮生长因子受体2阴性乳腺癌新辅助化疗疗效雌激素受体 Ki-67

IL-10-1082G/A基因多态性与复发性口腔溃疡易感性的meta分析

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上海口腔医学 2018年第5期27卷 554-560页

作者：杜全高许亚梅吴婷婷付钢重庆医科大学口腔医学院口腔疾病与生物医学重庆市重点实验室重庆市高校市级口腔生物医学工程重点实验室重庆400017

目的:采用meta分析,系统评价白细胞介素10(interleukin-10,IL-10)-1082G/A基因多态性与复发性口腔溃疡(recurrent oral ulcer,ROU)易感性的相关性。方法:计算机检索PubMed、Embase、Web of Science、CNKI、CBM、万方数据库和维普数据库,收集IL-10-1082G/A基因多态性与ROU易感性的相关研究,检索时限均从建库至2017年8月。由2名研究者按照纳入和排除标准独立筛选文献,提取资料,对纳入文献进行方法学质量评价和异质性检验,采用RevMan5.3软件进行meta分析。结果:共纳入6篇病例-对照研究,包含病例组668例和对照组769例。在总体人群中,等位基因模型(G vs A)、隐性模型(GG+GA vs AA)和杂合子模型(GA vs AA)3组基因模型的meta分析结果显示,IL-10-1082G/A基因多态性与ROU易感性具有显著相关性[G vs A:OR=1.31,95%CI (1.03,1.66),P=0.03;GG+GA vs AA:OR=1.45,95%CI(1.16,1.82),P=0.001;GA vs AA:OR=1.33,95%CI(1.04,1.70),P=0.02]。在亚洲人种的亚组分析中,其meta分析结果与总体人群一致。结论:IL-10-1082G/A基因多态性与ROU易感性有关,携带G等位基因和GA基因型者,患ROU的风险增加。

关键词：复发性口腔溃疡白细胞介素10 基因多态性 meta分析

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交叉地带的矛盾人生:重读路遥《人生》

陇东学院学报 2013年第4期24卷 50-53页

作者：吴婉婷权雅宁宝鸡文理学院陕西宝鸡721013

《人生》描写了在都市与乡村交叉地带生活的农村青年高加林的奋斗历程,呈现出城乡交叉地带二元对立的转型期社会生活。高加林对自己爱情、生活和人生目标的矛盾选择,体现出传统道德与现代价值观念、纯洁爱情与现实功利的多重对立,也提... 详细信息

《人生》描写了在都市与乡村交叉地带生活的农村青年高加林的奋斗历程,呈现出城乡交叉地带二元对立的转型期社会生活。高加林对自己爱情、生活和人生目标的矛盾选择,体现出传统道德与现代价值观念、纯洁爱情与现实功利的多重对立,也提出了农村知识青年该如何选择这一中国社会生活中的重大问题,至今仍引人深思。

关键词：路遥《人生》农村知识青年交叉地带边缘人物矛盾人生

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基于多语义文本表示的自适应模糊聚类算法

科学技术与工程 2023年第11期23卷 4709-4717页

作者：刘雅萱武娇顾兴全尹雪婷中国计量大学理学院杭州310018 中国计量大学标准化学院杭州310018

由于词语的多语义问题和传统的文本表示与聚类过程相互独立的问题,导致文本聚类准确率较低。针对上述问题提出一种基于多语义文本表示的自适应模糊C-均值(multi-semantic repre-sentation based adaptive fuzzy C-means,MSR-AFCM)聚类... 详细信息

由于词语的多语义问题和传统的文本表示与聚类过程相互独立的问题,导致文本聚类准确率较低。针对上述问题提出一种基于多语义文本表示的自适应模糊C-均值(multi-semantic repre-sentation based adaptive fuzzy C-means,MSR-AFCM)聚类算法。通过将词语软聚类划分成多个词簇构建多个语义空间,将语义空间个数作为文本初始聚类数目,利用词语的语义隶属度计算每个文本属于文本空间的语义隶属度,并以此为对算法进行初始化。在算法运行过程中,根据更新的文本语义隶属度和文本分布状况,逐步剔除冗余的文本空间,以达到优化聚类数目的目标。与其他文本聚类算法相比,MSR-AFCM算法能够提高2.66%~12.5%的聚类性能,具有更高的准确率和兰德系数。

关键词：文本聚类文本表示模糊聚类隶属度