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Magnetic tuning of optical anisotropy in 2D materials: Insights from antiferromagnetic-TMDC interfaces

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Nano Research 2025年第2期18卷 869-877页

作者： Miaoxia Gao Xing Xie Junying Chen Junnan Ding Fangping Ouyang Zongwen Liu jian-Tao Wang Jun he Yanping Liu Institute of Quantum Physics School of PhysicsCentral South UniversityChangsha 410083China State Key Laboratory of Precision Manufacturing for Extreme Service Performance Central South UniversityChangsha 410083China School of Physics and Technology State Key Laboratory of Chemistry and Utilization of Carbon Based Energy ResourcesXinjiang UniversityUrumqi 830046China School of Chemical and Biomolecular Engineering The University of SydneyNSW 2006Australia The University of Sydney Nano Institute The University of SydneyNSW 2006Australia Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Songshan Lake Materials Laboratory Dongguan 523808China

Atomically thin two-dimensional(2D)magnetic materials offer unique opportunities to enhance interactions between electron spin,charge,and lattice,leading to novel physical properties at low-dimensional *** extensive research has explored how breaking three-fold(Cs)rotational symmetry in transition metal dichalcogenides(TMDC)can induce optical anisotropy at heterointerfaces,the role of magnetism in modulating these anisotropic optical properties ***,engineerwe antiferromagnet/semiconductor heterostructure by coupling isotropic MoWSe_(2) with the low-symmetric antiferromagnet NiPSs,introducing in-plane anisotropy in the MoWSe_(2) ***-temperature photoluminescence(PL)measurements reveal a pronounced linear polarization-dependent exciton emission intensity at the MoWSe_(2)/NiPS interface,with anisotropy ratios of 1.09 and 1.07 for charged and neutral excitons,***,applying an out-of-plane magnetic field results in a dramatic rotation of the exciton polarization direction by up to 90°at 9 T,significantly exceeding the previously reported maximum deflection of around 27°.This pronounced polarization rotation is not solely attributed to valley coherence,indicating a strong influence of the magnetic order in *** findings provide new insights into the role of magnetic ordering in tuning optical anisotropy in 2D materials,paving the way for the development of advanced polarization-sensitive optoelectronic and magneto-optic devices.

关键词： transition metal dichalcogenides(TMDC) optical anisotropy symmetry engineering antiferromagnetic NiPS_(3)

生物技术在海洋鱼类苗种培育中的应用:现状与前景

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沈阳师范大学学报（自然科学版） 2004年第4期22卷 295-300页

作者：李文笙刘永坚何建国林浩然中山大学水生经济动物研究所暨广东省水生经济动物良种繁育重点实验室广东广州510275

围绕海洋鱼类苗种培育过程中饵料和病害这两个关键问题,就基因克隆、重组蛋白、DNA疫苗、抗菌肽和转基因技术等生物技术和产品在鱼类中的研究现状和前景进行讨论和分析,提出应针对鱼苗的营养需求和消化吸收的生理特点,有效利用基因工程... 详细信息

围绕海洋鱼类苗种培育过程中饵料和病害这两个关键问题,就基因克隆、重组蛋白、DNA疫苗、抗菌肽和转基因技术等生物技术和产品在鱼类中的研究现状和前景进行讨论和分析,提出应针对鱼苗的营养需求和消化吸收的生理特点,有效利用基因工程产品;同时,要研究和采用新的病害控制技术,提高苗种成活率.苗种培育是海洋鱼类养殖业发展的基础,在苗种培育中加强生物技术的应用,将大力推动海洋鱼类养殖业的健康可持续发展.

关键词：苗种培育生物技术病害控制技术苗种成活率鱼苗消化吸收营养需求海洋鱼类抗菌肽基因克隆

MFI分子筛限域Ru催化剂的制备及其丙烷催化燃烧性能

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中国环境科学 2025年第1期45卷 58-65页

作者：王晶晶夏良辉武雅妮刘昱洁徐赫刘起源刘基丞建艳飞何炽西安交通大学能源与动力工程学院动力工程多相流国家重点实验室陕西西安710049 挥发性有机物污染控制材料与技术国家工程实验室北京101408

采用原位合成法、浸渍法和沉积沉淀法制备Ru与MFI分子筛结合的3种催化剂,用于丙烷(C_(3)H_(8))的催化氧化活性研究.结果显示,通过原位合成法将Ru限域在MFI分子筛孔道内时,Ru@MFI催化剂展现出最佳的低温C_(3)H_(8)氧化活性,在270℃时达到... 详细信息

采用原位合成法、浸渍法和沉积沉淀法制备Ru与MFI分子筛结合的3种催化剂,用于丙烷(C_(3)H_(8))的催化氧化活性研究.结果显示,通过原位合成法将Ru限域在MFI分子筛孔道内时,Ru@MFI催化剂展现出最佳的低温C_(3)H_(8)氧化活性,在270℃时达到90%转化率,并表现出卓越的高温热稳定性和抗水性.通过XRD、N_(2)吸脱附、HAADF-STEM以及CO-TPD等表征技术发现,限域在MFI分子筛孔道内部的Ru具有最小的粒径和最高的分散度,增加了活性Ru位点的数量.拉曼和H_(2)-TPR表征结果表明,孔道内的Ru与MFI之间相互作用导致电荷重新分布,增强了还原性能.因此,Ru@MFI催化剂呈现出最优异的C_(3)H_(8)氧化活性.此外,MFI孔道的几何限制作用在高温焙烧过程中维持Ru的稳定性和分散度,有效避免了Ru的聚集,进一步确保了催化剂的高温热稳定性.

关键词：分子筛限域贵金属 Ru@MFI 丙烷催化氧化活性位点分散度高温热稳定性

Investigation on the stability and anti-eccentric load margin of a novel structure bearing lubricated by low viscosity medium

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Science China(Technological Sciences) 2022年第7期65卷 1613-1633页

作者： XIE ZhongLiang JIAO jian YANG Kang he Tao Department of Engineering Mechanics Northwestern Polytechnical UniversityXi'an 710072China Research&Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen 518057China School of Mechanical-Electric Engineering Xidian UniversityXi'an 710071China Wuhan Second Ship Design and Research Institute Wuhan 430205China

The paper studies the anti-eccentric load margin of a novel structure bearing lubricated by low viscosity medium. The lubrication dynamic model considering journal inclination angle is established. The effects of different speeds, loads, and tilted angles on the interface attributes of the bearing under typical working conditions are studied. The results show that the special structure bearing has self-stability margin of anti-tilted and anti-eccentric load. Particularly under different speed conditions, analyses show that the eccentric load has little influence on the static/dynamic characteristics of the bearing. Under the same conditions, the stability margin of the bearing is higher than that of traditional bearings. The research provides a theoretical basis for the application of such kinds of special structure bearings.

关键词： water-lubricated bearing tilted angle anti-eccentric load margin lubrication performance

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常用小麦粉包装材料的性能及其防虫效果研究

粮油食品科技 2025年第1期33卷 231-237页

作者：何睿张峰张袁泉陈金身吕建华中山市粮食储备经营管理有限公司广东中山528447 河南工业大学粮食和物资储备学院粮食储藏安全河南省协同创新中心河南郑州450001

为了解常用小麦粉包装材料的物理性能及其防虫效果,测试了5种包装材料的拉伸性能、直角撕裂强度、抗刺穿能力、燃烧性能、摩擦系数、抗跌落性能、耐压性能和密封性能,并使用赤拟谷盗成虫、烟草甲成虫以及烟草甲初孵幼虫对其防虫效果进... 详细信息

为了解常用小麦粉包装材料的物理性能及其防虫效果,测试了5种包装材料的拉伸性能、直角撕裂强度、抗刺穿能力、燃烧性能、摩擦系数、抗跌落性能、耐压性能和密封性能,并使用赤拟谷盗成虫、烟草甲成虫以及烟草甲初孵幼虫对其防虫效果进行了测试。结果表明:在力学性能上,编织袋和铝箔袋表现出了较佳的抗拉伸、抗撕裂能力和抗刺穿能力,当作为包装袋使用时,无纺布和编织袋表现出较佳的耐摩擦、抗跌落、耐压性能。5种常用包装材料都具有保护小麦粉不受储粮害虫侵染的能力,特别是真空塑料袋和铝箔袋可完全保护小麦粉不受储粮害虫侵害。

关键词：包装材料储粮害虫防虫性能测定

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Revisited dynamic modeling and eigenvalue analysis of the cable-stayed beam

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Acta Mechanica Sinica 2020年第4期36卷 950-963页

作者： Lianhua Wang Xiaoyu Zhang Kai he jian Peng College of Civil Engineering Hunan UniversityChangsha 410082China Key Laboratory for Wind and Bridge Engineering of Hunan Province Hunan UniversityChangsha 410082China Guangxi Communications Design Group Co. LtdNanning 530022China Hunan Provincial Key Laboratory of Structures for Wind Resistance and Vibration Control Hunan University of Science and TechnologyXiangtan 411201China

In this study,the Hamilton’s principle is applied to revisit the dynamic modeling of the cable-stayed beam,and the motion equations governing the nonlinear response of the cable-stayed beam are *** corresponding boundary terms are transformed to the dynamic equilibrium conditions through the continuity of the displacement at the anchoring *** the standard condensation procedure,the condensed model of the cable-stayed beam is *** eigenvalue analysis is performed to determine the closed-form eigenvalue solution of the linear problems,and two types of eigenvalue solution are *** is shown that the frequency spectrum of the cable-stayed beam exhibits the curve veering and crossover *** to these phenomena,the mode shapes of the cable-stayed beam may exhibit the coupling ***,the discrete model of the cable-stayed beam is determined,and the possible nonlinear interactions are discussed.

关键词： Cable-stayed beam Dynamic modeling Natural frequencies Mode shapes Curve veering

Latest advances in ionic liquids promoted synthesis and application of advanced biomass materials

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Frontiers of Chemical Science and Engineering 2023年第7期17卷 798-816页

作者： Ting he Jipeng Yan Wenzhe Xiao jian Sun Key Laboratory of Molecular Medicine and Biotherapy in the Ministry of Industry and Information Technology School of Life ScienceBeijing Institute of TechnologyBeijing 100081China Beijing Engineering Research Center of Cellulose and Its Derivatives Advanced Research Institute of Multidisciplinary ScienceBeijing Institute of TechnologyBeijing 100081China

The utilization of sustainable resources provides a path to relieving the problem of dependence on fossil resources. In this context, biomass materials have become a feasible substitute for petroleum-based materials. The development of biomass materials is booming and advanced biomass materials with various functional properties are used in many fields including medicine, electrochemistry, and environmental science. In recent years, ionic liquids have been widely used in biomass pretreatments and processing owing to their “green” characteristics and adjustable physicochemical properties. Thus, the effects of ionic liquids in biomass materials generation require further study. This review summarizes the multiple roles of ionic liquids in promoting the synthesis and application of advanced biomass materials as solvents, structural components, and modifiers. Finally, a prospective approach is proposed for producing additional higher-quality possibilities between ionic liquids and advanced biomass materials.

关键词： biomass materials functional materials ionic liquids synthesis structure-property relationship

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Speed and Accuracy Tradeoff for LiDAR Data Based Road Boundary Detection

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IEEE/CAA Journal of Automatica Sinica 2021年第6期8卷 1210-1220页

作者： Guojun Wang jian Wu Rui he Bin Tian State Key Laboratory of Automotive Simulation and Control Jilin UniversityChangchun 130022China State Key Laboratory of Management and Control for Complex Systems Institute of AutomationChinese Academy of SciencesBeijing 100190 the Qingdao Academy of Intelligent Industries ShandongChina

Road boundary detection is essential for autonomous vehicle localization and decision-making,especially under GPS signal loss and lane *** road boundary detection in structural environments,obstacle occlusions and large road curvature are two significant ***,an effective and fast solution for these problems has remained *** solve these problems,a speed and accuracy tradeoff method for LiDAR-based road boundary detection in structured environments is *** proposed method consists of three main stages:1)a multi-feature based method is applied to extract feature points;2)a road-segmentation-line-based method is proposed for classifying left and right feature points;3)an iterative Gaussian Process Regression(GPR)is employed for filtering out false points and extracting boundary *** demonstrate the effectiveness of the proposed method,KITTI datasets is used for comprehensive experiments,and the performance of our approach is tested under different road *** experiments show the roadsegmentation-line-based method can classify left,and right feature points on structured curved roads,and the proposed iterative Gaussian Process Regression can extract road boundary points on varied road shapes and traffic ***,the proposed road boundary detection method can achieve real-time performance with an average of 70.5 ms per frame.

关键词： 3D-LiDAR autonomous vehicle object detection point cloud road boundary

Risk analysis and maintenance decision making of natural gas pipelines with external corrosion based on Bayesian network

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Petroleum Science 2022年第3期19卷 1250-1261页

作者： Yun-Tao Li Xiao-Ning he jian Shuai College of Safety and Ocean Engineering China University of PetroleumBeijingChina

Buried natural gas pipelines are vulnerable to external corrosion because they are encased in a soil environment for a long *** the causes of external corrosion and taking specific maintenance measures is *** this work,a risk analysis and maintenance decision-making model for natural gas pipelines with external corrosion is proposed based on a Bayesian network.A fault tree model is first employed to identify the causes of external *** Bayesian network for risk analysis is determined *** maintenance strategies are then inserted into the Bayesian network to show a reduction of the *** costs of maintenance strategies and the reduced risk after maintenance are combined in an optimization function to build a decision-making *** of the limitations of historical data,some of the parameters in the Bayesian network are obtained from a probabilistic estimation model,which combines expert experience and fuzzy set ***,a case study is carried out to verify the feasibility of the maintenance decision *** indicates that the method proposed in this work can be used to provide effective maintenance schemes for different pipeline external corrosion scenarios and to reduce the possible losses caused by external corrosion.

关键词： Natural gas pipelines External corrosion Risk analysis Maintenance decision making Bayesian network