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Nano Materials Science 2024年第3期6卷 337-344页

作者： Ziye chen Zexu Hu shining chen Senlong Yu Liping Zhu Hengxue Xiang Meifang Zhu Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai201620China College of Mechanical and Engineering Donghua UniversityShanghai201620China

Temperature regulating fibers(TRF_(s)) with high enthalpy and high form stability are the key factors for thermal management. However, the enthalpies of most TRFsare not high, and the preparation methods are still at the laboratory scale. It remains a great challenge to use industrial spinning equipment to achieve continuous processing of TRF_(s) with excellent thermal and mechanical properties. Here, polyamide 6(PA6) based TRF_(s) with a sheath-core structure were prepared by bicomponent melt-spinning. The sheath-core TRF(TRF_(sc)) are composed of PA6 as sheath and functional PA6 as core, which are filled with the shape stable phase change materials(ssPCM),dendritic silica@polyethylene glycol(SiO_(2)@PEG). With the aid of the sheath structure, the filling content of SiO_(2)@PEG can reach 30 %, so that the enthalpy of the TRF_(s) can be as high as 21.3 J/g. The ultra-high enthalpy guarantees the temperature regulation ability during the alternating process of cooling and heating. In hot environment, the temperature regulation time is 6.59 min, and the temperature difference is 12.93℃. In addition, the mechanical strength of the prepared TRF_(sc) reaches 2.26 cN/dtex, which can fully meet its application in the field of thermal management textiles and devices to manage the temperature regulation of the human body or precision equipment, etc.

关键词： Thermal management Hybrid fibers Polyamides Bicomponent melt spinning Temperature regulating fibers

Fabrication of Conductive Domain Walls in x-cut Congruent Thin-film Lithium Niobate Using an Electrical-field Poling Technique(Invited)

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激光与光电子学进展 2024年第11期61卷 50-56页

作者： Su Yawen chen Haiwei Zhao Mengwei Niu Yunfei Li chen Zhang Yong Yang Shaoguang Zhu shining Hu Xiaopeng National Laboratory of Solid State Microstructures School of PhysicsCollege of Engineering and Applied SciencesNanjing UniversityNanjing 210008JiangsuChina Zhejiang Laboratory Hangzhou 311121ZhejiangChina

Conductive ferroelectric domain walls have attracted increasing research interest in the field of nanoelectronics,and the fabrication technique for such domain walls is *** this study,we investigated in detail the fabrication of conductive domain walls in x-cut congruent thin-film lithium niobate(TFLN)using an electrical-field poling *** ferroelectric domain structures can be controlled through the applied electrical field and applied pulse numbers,and the domain inversion process is related to the conduction characteristics of the domain *** domain structures in TFLN are revealed using confocal second-harmonic microscopy and piezoresponse force *** results provide further directions for the development and application of conductive domain walls in TFLN.

关键词： thin-film lithium niobate electric field poling head-to-head/tail-to-tail domain conduction characteristics of domain wall

Theory of high-density low-cross-talk waveguide superlattices

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Photonics Research 2016年第6期4卷 233-239页

作者： Nan Yang Huashan Yang Hengrun Hu Rui Zhu shining chen Hongguo Zhang Wei Jiang National Laboratory of Solid State Microstructures College of Engineering and Applied Sciences Nanjing University Collaborative Innovation Center of Advanced Microstructures Nanjing University College of Electronic Science and Engineering Nanjing University

Waveguide superlattices, a special type of waveguide arrays, can be designed to achieve very low cross talk at submicrometer/subwavelength pitches. The theoretical framework and design rationales for such waveguide superlattices will be presented in depth. Waveguide sidewall roughness can help to deter the coherent coupling between identical waveguides in nearby supercells, but it also induces random fluctuation of *** behavior of the transmission due to roughness in a waveguide superlattice is systematically *** transmission characteristics due to spectral oscillation and random roughness will be presented, and their evolution with the superlattice length will be analyzed.

关键词： length Theory of high-density low-cross-talk waveguide superlattices mode high

Metalens with tilted structures for high-efficiency focusing at large-angle incidences

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Chinese Optics Letters 2024年第5期22卷 117-123页

作者：王月陈晨吴圣杰叶欣祝世宁李涛 National Laboratory of Solid State Microstructures Key Laboratory of Intelligent Optical Sensing and ManipulationsJiangsu Key Laboratory of Artificial Functional MaterialsCollege of Engineering and Applied SciencesNanjing UniversityNanjing 210093China

The metalens has attracted remarkable attention due to its ultra-thin and ultra-light characteristics,which indicate great potential for compact ***,the limited efficiency at a large angle incidence severely hinders the application of wide-angle focusing and imaging,which is pursued in the fast-developing imaging ***,new strategies to improve the lens performance at large incident angles are in *** this work,we propose tilted structures for largeangle focusing with improved *** based on dynamic phase and geometric phase are designed and systematically characterized by numerical *** show that tilted structures of unit cells significantly improve the lens performance at oblique *** detail,the focusing efficiency of the metalens with tilted structures is increased over 25%at 30°incidence,as well as the modulation transfer *** addition,we develop a hybrid metalens array achieving highly efficient wide-angle imaging up to 120°.We believe this design provides a feasible route toward wide-field and high-performance imaging applications.

关键词： metalenses tilted structures large-angle incidence high efficiency

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波转子的驱动力形成机理数值模拟研究

工程热物理学报 2024年第3期45卷 725-732页

作者：产世宁陈叶宇李凤超付超北京航空航天大学宁波创新研究院先进飞行器与空天动力创新研究中心宁波315800 中国航空发动机研究院北京101304 北京航空航天大学航空发动机研究院北京102206

自旋波转子用气流的驱动力维持转子旋转,能够显著简化波转子发动机系统结构、提高可靠性。通过数值模拟方法研究不同几何通道内部流动现象对切向驱动力的影响,解释波转子的驱动力形成机理。结果表明:弯曲几何通道中的激波/膨胀波在传播... 详细信息

自旋波转子用气流的驱动力维持转子旋转,能够显著简化波转子发动机系统结构、提高可靠性。通过数值模拟方法研究不同几何通道内部流动现象对切向驱动力的影响,解释波转子的驱动力形成机理。结果表明:弯曲几何通道中的激波/膨胀波在传播过程中,波面发生倾斜,导致每个通道上下壁面间存在压差,多个通道的正向压差累积最终形成正向驱动力,实现波转子自旋。

关键词：自旋波转子驱动力弯曲通道数值模拟

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做好兼职班主任工作的体会与思考

武汉船舶职业技术学院学报 2013年第5期12卷 79-81页

作者：陈世宁武汉船舶职业技术学院湖北武汉430050

专职辅导员与兼职班主任双轨运行,是许多高校学生工作管理的方式。高校兼职班主任具有做好班级管理工作的特殊优势,只要把握关键,发挥优势,对于加强班级建设大有裨益。

关键词：兼职班主任优势管理

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北京地区设施中芍药灰霉病的研究

中国农学通报 2011年第6期27卷 78-83页

作者：陈士宁刘燕雷增普北京林业大学园林学院北京100083 国家花卉工程技术研究中心北京100083 北京林业大学资源与环境学院北京100083

芍药进入设施栽培后,常发生一种枝叶枯萎现象,危害严重。为明确病害发生原因,了解发病规律,笔者对北京地区设施栽培的芍药枝叶枯萎现象进行定期观察。通过分离培养、病原菌形态特征和寄主范围测定,鉴定该病为芍药灰霉病,其病原菌为半知... 详细信息

芍药进入设施栽培后,常发生一种枝叶枯萎现象,危害严重。为明确病害发生原因,了解发病规律,笔者对北京地区设施栽培的芍药枝叶枯萎现象进行定期观察。通过分离培养、病原菌形态特征和寄主范围测定,鉴定该病为芍药灰霉病,其病原菌为半知菌亚门葡萄孢属灰葡萄孢Botrytis cinerea Pers.。研究表明,该菌生长产孢的温度范围是4～28℃,最适合的温度范围是16～24℃;pH2～11范围都可以生长,最适的pH范围是3～5,pH为2时不能产孢;光照对菌落生长和产孢影响显著,给予一定光照有利于菌丝生长,黑暗有利于产孢,连续光照下不能产生孢子。

关键词：芍药芍药灰霉病设施栽培

固定总价方式下永定河综合整治工程合同管理探讨

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中国水利 2021年第1期 53-54,30页

作者：陈仕宁永定河流域投资有限公司北京100193

永定河综合治理与生态修复项目涉及永定河、桑干河、洋河、御河、十里河等多条主干河流及支流,分解至流域四省(直辖市)的具体项目近40个。为使承发包双方更好地履行合同,减少变更索赔,方便合同管理,部分项目采用了工程总承包管理模式,... 详细信息

永定河综合治理与生态修复项目涉及永定河、桑干河、洋河、御河、十里河等多条主干河流及支流,分解至流域四省(直辖市)的具体项目近40个。为使承发包双方更好地履行合同,减少变更索赔,方便合同管理,部分项目采用了工程总承包管理模式,并在合同签订和执行过程中运用了固定总价的合同计价方式,有效地控制了投资,对项目管理起到了积极作用。

关键词：流域治理固定总价总承包永定河

Metamaterials:From fundamental physics to intelligent design

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Interdisciplinary Materials 2023年第1期2卷 5-29页

作者： Ji chen Shanshan Hu shining Zhu Tao Li National Laboratory of Solid State Microstructures Key Laboratory of Intelligent Optical Sensing and ManipulationsJiangsu Key Laboratory of Artificial Functional MaterialsCollege of Engineering and Applied SciencesSchool of PhysicsNanjing UniversityNanjingChina National Mobile Communications Research Laboratory School of Information Science and EngineeringFrontiers Science Center for Mobile Information Communication and SecuritySoutheast UniversityNanjingChina

Metamaterials are artificial structures with the ability to efficiently control light-field,attracting intensive attention in the past few *** have studied the working principles,design strategies,and fabrication methods of metamaterials,making this field cross and combine with many disciplines,including physics,material science,electronics,and *** recent years,with the rapid development of high-efficiency and multifunctional metasurfaces,which are a two-dimensional version of metamaterials,great efforts have been made to push this material to practical *** particular,the introduction of artificial intelligent(AI)algorithms enables metamaterials-based photonic devices that exhibit excellent performances and intelligent *** this review,we first introduce the basic concepts,working principles,design methods,and applications of metamaterials,and then focus on the rapidly developing metamaterials research combined with AI ***,we conclude this review with personal perspectives on the current problems and future directions of metamaterials research and developments.

关键词： artificial intelligence artificial neural network inverse design metamaterial metasurface

Chip-scale metalens microscope for wide-field and depth-of-field imaging

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Advanced Photonics 2022年第4期4卷 68-75页

作者： Xin Ye Xiao Qian Yuxin chen Rui Yuan Xingjian Xiao chen chen Wei Hu Chunyu Huang shining Zhu Tao Li Nanjing University College of Engineering and Applied SciencesNational Laboratory of Solid State MicrostructuresKey Laboratory of Intelligent Optical Sensing and IntegrationJiangsu Key Laboratory of Artificial Functional MaterialsNanjingChina Collaborative Innovation Center of Advanced Microstructures NanjingChina

Microscopy is very important in research and industry,yet traditional optical microscopy suffers from the limited field-of-view(FOV)and depth-of-field(DOF)in high-resolution *** demonstrate a simultaneous large FOV and DOF microscope imaging technology based on a chip-scale metalens device that is implemented by a SiNxmetalens array with a co-and cross-polarization multiplexed dual-phase design and dispersive spectrum zoom effect.A 4-mm×4-mm FOV is obtained with a resolution of 1.74μm and DOF of200μm within a wavelength range of 450 to 510 nm,which definitely exceeds the performance of traditional microscopes with the same ***,it is realized in a miniaturized compact prototype,showing an overall advantage for portable and convenient microscope technology.

关键词： metalens microscope wide-field imaging