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Nonlinear optical selection rule based on valley-exciton locking in monolayer ws2

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Light(Science & Applications) 2015年第1期4卷 16-21页

作者： Jun Xiao Ziliang Ye Ying Wang hanyu zhu Yuan Wang Xiang Zhang NSF Nanoscale Science and Engineering Center(NSEC) University of California at BerkeleyBerkeleyCAUSA Material Sciences Division Lawrence Berkeley National LaboratoryBerkeleyCAUSA Department of Physics King Abdulaziz UniversityJeddahSaudi Arabia

Optical selection rules fundamentally determine the optical transitions between energy states in a variety of physical systems,from hydrogen atoms to bulk crystals such as gallium *** rules are important for optoelectronic applications such as lasers,energy-dispersive X-ray spectroscopy,and quantum ***,single-layer transition metal dichalcogenides have been found to exhibit valleys in momentum space with nontrivial Berry curvature and excitons with large binding ***,there has been little study of how the unique valley degree of freedom combined with the strong excitonic effect influences the nonlinear optical ***,we report the discovery of nonlinear optical selection rules in monolayer WS2,an important candidate for visible 2D optoelectronics because of its high quantum yield and large direct *** experimentally demonstrated this principle for second-harmonic generation and two-photon luminescence(TPL).Moreover,the circularly polarized TPL and the study of its dynamics evince a sub-ps interexciton relaxation(2p R 1s).The discovery of this new optical selection rule in a valleytronic 2D system not only considerably enhances knowledge in this area but also establishes a foundation for the control of optical transitions that will be crucial for valley optoelectronic device applications such as 2D valley-polarized THz sources with 2p–1s transitions,optical switches,and coherent control for quantum computing.

关键词： nonlinear optical selection rule 2D materials 2p–1s exciton relaxation valley exciton

Netrin-1 works with UNC5B to regulate angiogenesis in diabetic kidney disease

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Frontiers of Medicine 2020年第3期14卷 293-304页

作者： Xiaojing Jiao Dong Zhang Quan Hong Lei Yan Qiuxia Han Fengmin Shao Guangyan Cai Xiangmei Chen hanyu zhu Department of Nephrology Chinese People's Liberation Army(PLA)General HospitalChinese PLA Institute of NephrologyState Key Laboratory of Kidney DiseasesNational Clinical Research Center of Kidney DiseasesBeijing Key Laboratory of Kidney DiseaseBeijing 100853China Department of Nephrology Henan Provincial Key Laboratory of Kidney Disease and ImmunologyHenan Provincial People's Hospital(Zhengzhou University People's Hospital)Zhengzhou 450003China

Netrin-1,an axon guidance factor,and its receptor UNC5B play important roles in axonal development and *** study examined netrin-1 and UNC5B expression in kidneys with diabetic kidney disease (DKD) and investigated their roles in ***-1 and UNC5B were upregulated in streptozotocininduced DKD Wistar rats,and their expression was compared with that in healthy ***,exogenous netrin-1 in UNC5B-depleted human renal glomerular endothelial cells (HRGECs) inhibited cell migration and *** effect was likely associated with SRC pathway ***-1 treatment also eliminated the pro-angiogenic effects of exogenous VEGF-165 on UNC5B-silenced *** results indicate that UNC5B antagonizes netrin-1 and that UNC5B upregulation contributes partly to enhancing angiogenesis in ***,introducing exogenous netrin-1 and depleting endogenous UNC5B are potential strategies for reducing the incidence of early angiogenesis and mitigating kidney injury in DKD.

关键词： netrin-1 VEGF-165 UNC5B angiogenesis diabetic kidney disease

Atomically phase-matched second-harmonic generation in a 2D crystal

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Light(Science & Applications) 2016年第1期5卷 542-547页

作者： Mervin Zhao Ziliang Ye Ryuji Suzuki Yu Ye hanyu zhu Jun Xiao Yuan Wang Yoshihiro Iwasa Xiang Zhang Department of Mechanical Engineering NSF Nanoscale Science and Engineering CenterUniversity of CaliforniaBerkeleyCA 94720USA Materials Sciences Division Lawrence Berkeley National LaboratoryBerkeleyCA 94720USA Quantum-Phase Electronics Center(QPEC)and Department of Applied Physics The University of TokyoTokyo 113-8656Japan RIKEN Center for Emergent Matter Science(CEMS) Wako 351-0198Japan Department of Physics King Abdulaziz UniversityJeddah 21589Saudi Arabia

Second-harmonic generation(SHG)has found extensive applications from hand-held laser pointers to spectroscopic and microscopic ***,some cleavable van der Waals(vdW)crystals have shown SHG arising from a single atomic layer,where the SH light elucidated important information such as the grain boundaries and electronic structure in these ultra-thin ***,despite the inversion asymmetry of the single layer,the typical crystal stacking restores inversion symmetry for even numbers of layers leading to an oscillatory SH response,drastically reducing the applicability of vdW crystals such as molybdenum disulfide(MoS_(2)).Here,we probe the SHG generated from the noncentrosymmetric 3R crystal phase of MoS_(2).We experimentally observed quadratic dependence of second-harmonic intensity on layer number as a result of atomically phase-matched nonlinear dipoles in layers of the 3R crystal that constructively *** studying the layer evolution of the A and B excitonic transitions in 3R-MoS_(2) using SHG spectroscopy,we also found distinct electronic structure differences arising from the crystal structure and the dramatic effect of symmetry and layer stacking on the nonlinear properties of these atomic *** constructive nature of the SHG in this 2D crystal provides a platform to reliably develop atomically flat and controllably thin nonlinear media.

关键词： atomically thin phase-matching second-harmonic generation 3R-MoS_(2)

Comparative analysis of membranous and other nephropathy subtypes and establishment of a diagnostic model

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Frontiers of Medicine 2019年第5期13卷 618-625页

作者： hanyu zhu Bo Fu Yong Wang Jing Gao Qiuxia Han Wenjia Geng Xiaoli Yang Guangyan Cai Xiangmei Chen Dong Zhang Department of Nephrology Chinese PLA General HospitalChinese PLA Institute of NephrologyState Key Laboratory of Kidney DiseasesNational Clinical Research Center of Kidney DiseasesBeijing Key Laboratory of Kidney DiseaseBeijing 100853China Department of Clinical Biochemistry Chinese PLA General HospitalBeijing 100853China Department of Nephrology The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052China

This study aimed to compare clinical features between membranous nephropathy (MN) and nonmembranous nephropathy (non-MN), to explore the clinically difTerential diagnosis of these two types, and to establish a diagnostic model of MN. After renal biopsy was obtained, 798 patients were divided into two groups based on their examination results: primary MN group (n = 248) and non-MN group (n = 550). Their data were statistically analyzed. Logistic regression analysis indicated that anti-PLA2R antibodies, IgG, and Cr were independently correlated with MN, and these three parameters were then used to establish the MN diagnostic model. A receiver operating characteristic (ROC) curve confirmed that our diagnostic model could distinguish between patients with and without MN, and their corresponding sensitivity, specificity, and AUC were 79.9%, 89.4%, and 0.917, respectively. The cutoff value for this combination in MN diagnosis was 0.34. The established diagnostic model that combined multiple factors shows a potential for broad clinical applications in differentiating primary MN from other kidney diseases and provides reliable evidence supporting the feasibility of noninvasive diagnosis of kidney diseases.

关键词： multiparameter analysis diagnosis model membranous nephropathy

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体能训练疲劳状态对汗液指标的影响

标记免疫分析与临床 2025年第1期32卷 25-29,51页

作者：张正朱晗玉罗烨程昱璇丁潇楠田亚平张春燕中国人民解放军总医院医学创新研究部北京100853 肾脏疾病国家重点实验室北京100853 上海体育大学上海200438

目的旨在通过对体能训练状态下汗液指标的检测为汗液预警限设置提供依据。方法研究选择91名某大学男性志愿者,分为室温训练(83名)和热习服训练(8名)两组。室温训练人员在20±2℃、相对湿度40%左右的环境中进行双腿自重深蹲至疲劳;热... 详细信息

目的旨在通过对体能训练状态下汗液指标的检测为汗液预警限设置提供依据。方法研究选择91名某大学男性志愿者,分为室温训练(83名)和热习服训练(8名)两组。室温训练人员在20±2℃、相对湿度40%左右的环境中进行双腿自重深蹲至疲劳;热习服训练人员在40℃、相对湿度60%左右的环境仓中连续训练15d。采集训练后疲劳状态下的汗液,检测K^(+)、Na^(+)、Cl^(-)、Ca^(2+)、乳酸(Lac)、葡萄糖(Glu)、皮质醇(Cor)等指标。结果经Shapiro-Wilk检验,7组数据呈非正态分布。通过Spearman检验分析相关性,结果显示Na^(+)、Cl^(-)和K^(+)呈强正相关,Lac和Glu呈强负相关,Ca^(2+)与Glu呈强正相关、与Lac呈强负相关,Cor与Cl^(-)呈正相关、与Lac呈负相关。结论本文讨论了汗液离子与代谢物相关性的生理意义、疲劳状态下汗液指标参考范围意义及热习服训练对汗液指标的影响,确定了青年男性疲劳状态下汗液7指标参考范围,且发现热习服训练中汗液Cl^(-)和Ca^(2+)显著升高,为理解训练人员生理变化、优化训练方案、预防热相关疾病和研究汗液与身体机能关系提供参考。

关键词：训练疲劳汗液无创监测乳酸皮质醇

A dynamic control decision approach for fixed-wing aircraft games via hybrid action reinforcement learning

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Science China(Information Sciences) 2025年第03期68卷 197-219页

作者： Xing zhuANG Dongguang LI hanyu LI Yue WANG Jihong zhu Science and Technology on Electromechanical Dynamic Control Laboratory Beijing Institute of Technology Department of Precision Instrument Tsinghua University

Autonomous decision-making is crucial for aircraft to achieve quick victories in diverse scenarios. Based on a 6-degree-of-freedom aircraft model, this paper proposes a decoupled guidance and control theory for autonomous aircraft maneuvering, distinguishing between close and long-range engagements. We introduce a method for heading attitude control to enhance stability during close-range interactions and a speed-based adaptive grid model for precise waypoint control in mid-to-long-range engagements. The paper transforms dynamic aircraft interactions into a Markov decision process and presents a hybrid discrete and continuous action reinforcement learning approach. This unified learning framework offers enhanced generalization and learning speed for dynamic aircraft adversarial processes. Experimental results indicate that in a symmetric environment, our approach rapidly achieves Nash equilibrium, securing over a 10% advantage. In unmanned aerial aircraft game control with higher maneuverability, the probability of gaining a situational advantage increases by more than 40%. Compared to similar methods, our approach demonstrates superior effectiveness in decision optimization and adversarial success ***, we validate the algorithm's robustness and adaptability in an asymmetric environment, showcasing its promising application potential in collaborative control of aircraft clusters.

关键词： intelligent air combat unmanned aerial vehicle game dynamic control reinforcement learning

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Profile of Dr. Jiaojun zhu

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Science China(Life Sciences) 2025年第2期68卷 311-313页

作者： zhu, Jiaojun

Dr. Jiaojun zhu is the director general of Institute of Applied Ecology(IAE), Chinese Academy of Sciences(CAS)(2018 to present). He received his B.S. degree in Forest Science from Shenyang Agricultural University, China in July 1987, and subsequently joined Institute of Forestry and Soil, CAS(now known as the IAECAS) to pursue his M.S. degree in *** graduation, he served as a research assistant and an associate research fellow in the IAE-CAS from 1990 to 1996.

关键词： Forest pursue assistant

A SOLUTION OF MINIMUM NORM FOR QUANTITATIVE PHASE ANALYSIS BY STANDARDLESS X-RAY DIFFRACTION

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Acta Metallurgica Sinica(English Letters) 1991年第9期4卷 225-229页

作者： ZHAO Han GONG Yansheng SHEN Jingyuan RUAN Qikuan JIN Jialing zhu hanyu Research Institute of Qiqihar Steel Works,Fulaerji,China

A new expression of quantitative phase analysis by standardless X-ray diffraction has been derived using intensity matrix of vector *** criterion of standardless X-ray diffraction analysis was suggested,so as to separate the diffraction pattern of every phase from that of *** optimal solution could be obtained by the least squares regression.

关键词： X-ray diffraction standardless phase analysis least square regression

追踪变革:信息素养项目(PIL)的发展成果与启示

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农业图书情报学报 2021年第12期33卷 16-28页

作者：朱含雨中山大学信息管理学院广州510006

[目的/意义]文章批判性研究了信息素养项目(Project Information Literacy,简称PIL)的主要研究成果与核心发现,旨在为中国的信息素养研究与实践提供参考。[方法/过程]作者通过历史分期、文献调查等方法,全面梳理了PIL主要研究成果和核... 详细信息

[目的/意义]文章批判性研究了信息素养项目(Project Information Literacy,简称PIL)的主要研究成果与核心发现,旨在为中国的信息素养研究与实践提供参考。[方法/过程]作者通过历史分期、文献调查等方法,全面梳理了PIL主要研究成果和核心发现,指出其系统梳理了不同情境下大学生的信息行为,全面总结了大学生身份转变中的信息挑战,并且针对不同群体提出了促进大学生学习研究的建议。[结果/结论]PIL项目为信息素养理论与实践工作提供一定的经验借鉴:(1)紧跟时代发展,重视大学生信息素养的持续变化;(2)整合多方力量,构建大型研究项目的长效机制;(3)理论联系实践,重视信息素养研究的实际作用。

关键词：信息素养信息素养项目大学生高校图书馆