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Excitonic devices based on two-dimensional transition metal dichalcogenides van der Waals heterostructures

Frontiers of Chemical Science and Engineering 2024年第2期18卷 41-67页

作者： Yulun Liu Yaojie Zhu Zuowei Yan Ruixue Bai Xilin Zhang yanbo ren Xiaoyu Cheng Hui Ma Chongyun Jiang College of Electronic Information and Optical Engineering Nankai UniversityTianjin 300350China School of Physical Science and Technology Tiangong UniversityTianjin 300387China

Excitonic devices are an emerging class of technology that utilizes excitons as carriers for encoding, transmitting, and storing information. Van der Waals heterostructures based on transition metal dichalcogenides often exhibit a type II band alignment, which facilitates the generation of interlayer excitons. As a bonded pair of electrons and holes in the separation layer, interlayer excitons offer the chance to investigate exciton transport due to their intrinsic out-of-plane dipole moment and extended exciton lifetime. Furthermore, interlayer excitons can potentially analyze other encoding strategies for information processing beyond the conventional utilization of spin and charge. The review provided valuable insights and recommendations for researchers studying interlayer excitonic devices within van der Waals heterostructures based on transition metal dichalcogenides. Firstly, we provide an overview of the essential attributes of transition metal dichalcogenide materials, focusing on their fundamental properties, excitonic effects, and the distinctive features exhibited by interlayer excitons in van der Waals heterostructures. Subsequently, this discourse emphasizes the recent advancements in interlayer excitonic devices founded on van der Waals heterostructures, with specific attention is given to the utilization of valley electronics for information processing, employing the valley index. In conclusion, this paper examines the potential and current challenges associated with excitonic devices.

关键词： excitonic devices van der Waals heterostructures transition metal dichalcogenides interlayer excitons valley-Hall effect optoelectronics

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Image segmentation of exfoliated two-dimensional materials by generative adversarial network-based data augmentation

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Chinese Physics B 2024年第3期33卷 112-117页

作者：程晓昱解晨雪刘宇伦白瑞雪肖南海任琰博张喜林马惠蒋崇云 College of Electronic Information and Optical Engineering Nankai UniversityTianjin 300350China School of Physical Science and Technology Tiangong UniversityTianjin 300387China

Mechanically cleaved two-dimensional materials are random in size and *** atomically thin flakes by human experts is inefficient and unsuitable for scalable *** learning algorithms have been adopted as an alternative,nevertheless a major challenge is a lack of sufficient actual training *** we report the generation of synthetic two-dimensional materials images using StyleGAN3 to complement the ***3Plus network is trained with the synthetic images which reduces overfitting and improves recognition accuracy to over 90%.A semi-supervisory technique for labeling images is introduced to reduce manual *** sharper edges recognized by this method facilitate material stacking with precise edge alignment,which benefits exploring novel properties of layered-material devices that crucially depend on the interlayer *** feasible and efficient method allows for the rapid and high-quality manufacturing of atomically thin materials and devices.

关键词： two-dimensional materials deep learning data augmentation generating adversarial networks

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A FOUR-WEIGHT WEAK TYPE MAXIMAL INEQUALITY FOR MARTINGALES

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Acta Mathematica Scientia 2019年第2期39卷 413-419页

作者： yanbo ren School of Mathematics and Statistics Henan University of Science and Technology

In this article, some necessary and sufficient conditions are shown in order that weighted inequality of the form ■holds a.e. for uniformly integrable martingales f =(f_n)n≥0 with some constant C > 0,where Φ_1,Φ_2 are Young functions, w_i(i = 1,2,3, 4) are weights, f~* =sup n≥0 |f_n| and f_∞=lim n→∞ f_n a.e. As an application, two-weight weak type maximal inequalities of martingales are considered, and particularly a new equivalence condition is presented.

关键词： weight weak type inequality martingale maximal operator Young function

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Interpolation of Lorentz martingale spaces

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Science China Mathematics 2012年第9期55卷 1951-1959页

作者： ren yanbo GUO TieXin School of Mathematics and Statistics Henan University of Science and Technology Luoyang 471003 China LMIB and School of Mathematics and Systems Science Beihang University Beijing 100191 China

In this paper,we apply function parameters,introduced by Persson,to real interpolation of Lorentz martingale *** new interpolation theorems concerning Lorentz martingale spaces are *** results that we obtain generaliz... 详细信息

关键词： martingale Lorentz space interpolation function parameter

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水飞蓟粕替代豆粕对羔羊生长性能、血液生化指标及肝脏抗氧化指标和代谢相关基因表达的影响

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动物营养学报 2024年第4期36卷 2524-2540页

作者：赵濛任彦博杜瑞平宋利文贺志雄高民内蒙古自治区农牧业科学院动物营养与饲料研究所呼和浩特010031 内蒙古农业大学动物科学学院呼和浩特010018 中国科学院亚热带农业生态研究所中国科学院亚热带农业生态过程重点实验室长沙410125

本试验主要目的是研究水飞蓟粕替代豆粕对羔羊生长性能、血液生化指标及肝脏抗氧化指标和代谢相关基因表达的影响。选取63只体重相近、体况良好的呼伦贝尔羔羊为试验动物,随机分为3组,每组设7个重复,每个重复3只羊。3组饲粮中水飞蓟粕... 详细信息

本试验主要目的是研究水飞蓟粕替代豆粕对羔羊生长性能、血液生化指标及肝脏抗氧化指标和代谢相关基因表达的影响。选取63只体重相近、体况良好的呼伦贝尔羔羊为试验动物,随机分为3组,每组设7个重复,每个重复3只羊。3组饲粮中水飞蓟粕替代豆粕的比例分别为0(Ⅰ组)、50%(Ⅱ组)和100%(Ⅲ组)。试验期共90 d,其中预试期27 d,正试期63 d,试验期内羔羊每月称重,每天记录采食量。试验结束后每组随机选择9只羔羊采血,3只羔羊屠宰并采集肝脏组织样本。结果显示:1)Ⅰ组、Ⅱ组、Ⅲ组羔羊的生长性能无显著差异(P>0.05)。2)Ⅰ组、Ⅱ组、Ⅲ组羔羊的血清代谢指标无显著差异(P>0.05);Ⅲ组血浆中白细胞介素-1β(IL-1β)、肿瘤坏死因子-α(TNF-α)、转化生长因子-β(TGF-β)、肝细胞生长因子(HGF)、血管内皮细胞生长因子(VEGF)的含量显著高于Ⅰ组(P≤0.05),而胰岛素样生长因子-1(IGF-1)和白细胞介素-2(IL-2)的含量各组间无显著差异(P>0.05)。3)各组羔羊的肝脏抗氧化指标无显著差异(P>0.05),但与Ⅰ组相比,Ⅲ组肝脏总抗氧化能力(T-AOC)以及超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)活性升高(P>0.05),丙二醛(MDA)含量降低(P>0.05)。4)与Ⅰ组相比,Ⅲ组肝脏脂代谢相关基因乙酰辅酶A酰基转移酶1(ACAA1)、乙醛脱氢酶3家族成员A2(ALDH3A2)、脂肪酸合成酶(FAS)的相对表达量上升(P>0.05),肝脏糖代谢相关基因果糖双磷酸酶1(FBP1)的相对表达量显著升高(P≤0.05),磷酸烯醇丙酮酸羧激酶2(PCK2)、葡萄糖-6-磷酸酶催化亚基(G6PC)的相对表达量上升(P>0.05);Ⅲ组肝脏三羧酸循环通路相关基因琥珀酸脱氢酶复合物亚基B(SDHB)和琥珀酸脱氢酶复合物亚基C(SDHC)的相对表达量显著上升(P≤0.05),异柠檬酸脱氢酶3β亚基(IDH3B)的相对表达量上升(P>0.05)。综上可知,饲粮中采用水飞蓟粕替代豆粕不会对羔羊的生长性能及肝脏代谢产生负面影响,同时可以提高血液中免疫细胞因子含量,有助于提高抗病性;同时,水飞蓟粕还可以提高羔羊肝脏抗氧化能力,上调肝脏代谢基因表达,加快能量代谢循环,对生产起积极作用。

关键词：水飞蓟粕羔羊生长性能肝脏代谢

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Weak martingale Hardy spaces and weak atomic decompositions

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Science China Mathematics 2006年第7期49卷 912-921页

作者： HOU Youliang & ren yanbo School of Mathematics and Statistics, Wuhan University, Wuhan 430072, China Department of Mathematics & Physics, Henan University of Science and Technology, Luoyang 471003, China School of Mathematics and Statistics Wuhan University Wuhan China Department of Mathematics & Physics Henan University of Science and Technology Luoyang China

In this paper we define some weak martingale Hardy spaces and three kinds of weak atoms. They are the counterparts of martingale Hardy spaces and atoms in the classical martingale Hp-theory. And then three atomic decomposition theorems for martingales in weak martingale Hardy spaces are proved. With the help of the weak atomic decompositions of martingale, a sufficient condition for a sublinear operator defined on the weak martingale Hardy spaces to be bounded is given. Using the sufficient condition, we obtain a series of martingale inequalities with respect to the weak Lp-norm, the inequalities of weak (p ,p)-type and some continuous imbedding relationships between various weak martingale Hardy spaces. These inequalities are the weak versions of the basic inequalities in the classical martingale Hp-theory.

关键词： martingale, weak Hardy space, weak atom, atomic decomposition.

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q凸Banach空间的一些新同构特征

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数学物理学报（A辑） 2012年第6期32卷 1086-1091页

作者：任颜波北京航空航天大学数学与系统科学学院北京100191 河南科技大学数学与统计学院河南洛阳471003

利用向量值鞅的好λ-不等式和重排不等式给出了q凸Banach空间的一些新的同构特征.特别地,得到了取值于q可凸Banach空间的鞅的这些好λ-不等式和重排不等式是相互等价的.

关键词：鞅好λ-不等式重排不等式 q凸空间

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弱Orlicz鞅空间的弱原子分解及其应用

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数学年刊（A辑） 2015年第2期36卷 119-128页

作者：任颜波河南科技大学数学与统计学院河南洛阳471023

对3类由凹函数生成的弱Orlicz鞅空间建立了相应的弱原子分解.作为应用,首先给出了这些弱Orlicz鞅空间上次线性算子有界的一个充分条件,并在此基础上证明了一些弱型鞅不等式,然后证明了关于这些弱Orlicz鞅空间的Marcinkiewicz型插值定理.

关键词：鞅弱Orlicz空间原子分解有界次线性算子 Marcinkiewicz型插值定理

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Improving the fatigue endurance of lead zirconate titanate thin films through PbO interfacial modification

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Rare Metals 2011年第1期30卷 68-71页

作者： LEI Rong ren yanbo QIAO Lijie GU Hongwei YUE Zhenxing XIE Dan CAO Jiangli Institute for Advanced Materials and Technology University of Science and Technology Beijing Beijing 100083 China Institute of Electrical Engineering Chinese Academy of Sciences Beijing 100190 China State Key Laboratory of New Ceramic and Fine Processing Tsinghua University Beijing 100084 China Institute of Microelectronics Tsinghua University Beijing 100084 China

The effects of the modification of electrode/ceramic interfaces through a chemical solution deposition-derived PbO buffer layer on the fatigue endurance of lead zirconate titanate（PZT） thin films were *** grain size and the surface roughness of the PZT films increased through PbO interfacial ***,the PZT films with PbO interfacial modification had a better crystallographic structure and no evident secondary phases were *** the remanent polarization and dielectric constant were reduced,the fatigue endurance was *** on the results,the mechanism for the fatigue endurance improvement was discussed.

关键词： ferroelectric thin films fatigue lead zirconate titanate chemical modification lead oxide

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A FAS approach for stabilization of generalized chained forms: part 1. Discontinuous control laws

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Science China(Information Sciences) 2024年第2期67卷 118-143页

作者： Guang-ren DUAN Center for Control Theory and Guidance Technology Harbin Institute of Technology Center for Control Science and Technology Southern University of Science and Technology

In this paper, a type of general nonholonomic systems is proposed, which contains both the Brockett’s two example systems, and their extended n-dimensional chained forms, as special cases. For the stabilization of such systems, a stabilizing controller is proposed based on the fully actuated system(FAS)approach, which is discontinuous at the origin but time-invariant when the open-loop system is time-invariant,and drives the feasible trajectories of the system to the origin exponentially. Furthermore, the proposed FAS approach is also extended to the sub-normal system case and the time-delay system case.

关键词： nonholonomic systems feedback stabilization exponential convergence sub-fully actuated systems time-delay systems

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