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Exact solution of U(5)–O(6) transitional description in interacting boson model with two-particle and two-hole configuration mixing

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Chinese Physics C 2020年第6期44卷 95-102页

作者： Lianrong Dai feng Pan ziwei feng Yu Zhang Sai Cui JPDraayer Department of Physics Liaoning Normal UniversityDalian 116029China Department of Physics and Astronomy Louisiana State UniversityBaton RougeLA 70803-4001USA

The exact solution of the U(5)-O(6)transitional description in the interacting boson model with twoparticle and two-hole configuration mixing is derived based on the Bethe ansatz *** Bethe ansatz equations are provided to determine the model’s eigenstates and corresponding eigen-energies.N=2 and N=4 cases are considered as examples to demonstrate the solution *** an example of the application,some low-lying level energies and B(E2)ratios of 108Cd are fitted and compared with the corresponding experimental data.

关键词： configuration mixing shape coexistence exactly solvable models

Resonant enhancement of second harmonic generation in etchless thin film lithium niobate heteronanostructure

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Science China(Physics,Mechanics & Astronomy) 2022年第10期65卷 75-82页

作者： Zhijin Huang Kaiwen Luo ziwei feng Zhanyuan Zhang Yang Li Wentao Qiu Heyuan Guan Yi Xu Xiangping Li Huihui Lu Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications Department of Optoelectronic EngineeringJinan UniversityGuangzhou 510632China Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications Institute of Photonics TechnologyJinan UniversityGuangzhou 510632China Guangdong Provincial Key Laboratory of Information Photonics Technology Institute of Advanced Photonics TechnologySchool of Information EngineeringGuangdong University of TechnologyGuangzhou 510006China

Lithium niobate has received interest in nonlinear frequency conversion due to its wide transparency window,from ultraviolet to mid-infrared spectral regions,and large second-order nonlinear ***,its nanostructure is generally difficult to etch,resulting in low-Q resonance and lossy nanostructures for second harmonic *** applying the concept of bound states in the continuum,we performed theoretical and experimental investigations on high-Q resonant etchless thin-film lithium niobate with Si O_(2) nanostructures on top for highly efficient second harmonic *** the fabricated nanostructured devices,a resonance with a Q factor of 980 leads to the strong enhancement of second harmonic generation by over 1500 times compared with that in unpatterned lithium niobate thin *** the pump slightly deviates from central resonance,an absolute conversion efficiency of 6.87×10^(-7) can be achieved with the fundamental pump peak intensity of 44.65 MW/cm^(2),thus contributing to the normalized conversion efficiency of 1.54×10^(-5)cm^(2)/*** work establishes an etchless lithium niobate device for various applications,such as integrated nonlinear nanophotonics,terahertz frequency generation,and quantum information processing.

关键词： second harmonic generation etchless thin-film lithium niobate heteronanostructure high-Q resonance

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Dual-band polarized upconversion photoluminescence enhanced by resonant dielectric metasurfaces

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eLight 2023年第1期3卷 57-65页

作者： ziwei feng Tan Shi Guangzhou Geng Junjie Li Zi-Lan Deng Yuri Kivshar Xiangping Li Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications Institute of Photonics TechnologyJinan UniversityGuangzhou 511443China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Nonlinear Physics Centre Research School of PhysicsAustralian National UniversityCanberraACT 2601Australia Qingdao Innovation and Development Center of Harbin Engineering University Qingdao 266000China

Lanthanide-doped upconversion nanoparticles emerged recently as an attractive material platform underpinning a broad range of innovative applications such as optical cryptography,luminescent probes,and ***,the intricate 4f-associated electronic transition in upconversion nanoparticles leads only to a weak photoluminescence intensity and unpolarized emission,hindering many applications that demand ultrabright and polarized light ***,we present an effective strategy for achieving ultrabright and dual-band polarized upconversion *** employ resonant dielectric metasurfaces supporting high-quality resonant modes at dual upconversion bands enabling two-order-of-magnitude amplification of upconversion *** demonstrate that dual-band resonances can be selectively switched on polarization,endowing cross-polarization controlled upconversion luminescence with ultra-high degrees of polarization,reaching approximately 0.86 and 0.91 at dual emission wavelengths of 540 and 660 nm,*** strategy offers an effective approach for enhancing photon upconversion processes paving the way towards efficient low-threshold polarization upconversion lasers.

关键词： polarization polarized resonant

Enhanced organic degradation and microbial community cooperation by inoculating Bacillus licheniformis in low temperature composting

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Journal of Environmental Sciences 2024年第9期143卷 189-200页

作者： Jing Su Kaiyun Zhou Wenjie Chen Shaoqi Xu ziwei feng Yuan Chang Xiaoyan Ding Yi Zheng Xingling Tao Ake Zhang Yue Wang Ji Li Guochun Ding Yuquan Wei Nanjing Institute of Environmental Sciences Ministry of Ecology and EnvironmentNanjing 210042China College of Resources and Environmental Science Beijing Key Laboratory of Biodiversity and Organic FarmingChina Agricultural UniversityBeijing 100193China Organic Recycling Institute(Suzhou)of China Agricultural University Wuzhong DistrictSuzhou 215128China Fuyang Academy of Agricultural Sciences Fuyang 236065China

Microbial activity and interaction are the important driving factors in the start-up phase of food waste composting at low *** aim of this study was to explore the effect of inoculating Bacillus licheniformis on the degradation of organic components and the potential microbe-driven mechanism from the aspects of organic matter degradation,enzyme activity,microbial community interaction,and microbial metabolic *** results showed that after inoculating ***,temperature increased to 47.8℃ on day2,and the degradation of readily degraded carbohydrates(RDC)increased by 31.2%,and the bioheat production increased by 16.5%.There was an obvious enhancement of extracellular enzymes activities after inoculation,especially amylase activity,which increased by 7.68 times on day *** inoculated *** colonized in composting as key genus in the start-up *** network analysis and Mantel test indicated that inoculation drove the cooperation between microbial network modules who were responsible for various organic components(RDC,lipid,protein,and lignocellulose)degradation in the start-up *** function prediction suggested that carbohydrate metabolisms including starch and sucrose metabolism,glycolysis/gluconeogenesis,pyruvate metabolism,etc.,were improved by increasing the abundance of related functional genes after *** conclusion,inoculating *** accelerated organic degradation by driving the cooperation between microbial network modules and enhancing microbial metabolism in the start-up phase of composting.

关键词： Microbial agent Organic matter degradation Microbial interaction Food waste Low temperature composting

Diffractive photonic applications mediated by laser reduced graphene oxides

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Opto-Electronic Advances 2018年第2期1卷 1-8页

作者： Sicong Wang Xueying Ouyang ziwei feng Yaoyu Cao Min Gu Xiangping Li Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications Institute of Photonics Technology Jinan University Guangzhou 510632 China Laboratory of Artificial-Intelligence Nanophotonics and CUDOS (Centre for Ultrahigh bandwidth Devices for OpticalSystems) School of Science RMIT University Melbourne Victoria 3001 Australia

Modification of reduced graphene oxide in a controllable manner provides a promising material platform for producinggraphene based devices. Its fusion with direct laser writing methods has enabled cost-effective and scalable production for advanced applications based on tailored optical and electronic properties in the conductivity, the fluorescence and the refractive index during the reduction process. This mini-review summarizes the state-of-the-art status of the mechanisms of reduction of graphene oxides by direct laser writing techniques as well as appealing optical diffractive applications including planar lenses, information storage and holographic displays. Owing to its versatility and up-scalability, the laser reduction method holds enormous potentials for graphene based diffractive photonic devices with diverse functionalities.

关键词： graphene oxides nanophotonics direct laser writing

数字中国背景下提升政务人员数字素养的国际经验与实践路径

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湖南大学学报（社会科学版） 2024年第2期38卷 145-153页

作者：李晓静冯紫薇上海交通大学媒体与传播学院上海200240

基于案例分析法和比较研究法,挖掘美、英、澳、新等国家及国际组织提升政务人员数字素养的国际经验和实践策略,为我国的数字政府建设提供智力支撑。研究发现,建构政务人才数字素养测评指标、搭建数字素养教育系统、探索多方联动协作路... 详细信息

基于案例分析法和比较研究法,挖掘美、英、澳、新等国家及国际组织提升政务人员数字素养的国际经验和实践策略,为我国的数字政府建设提供智力支撑。研究发现,建构政务人才数字素养测评指标、搭建数字素养教育系统、探索多方联动协作路径是世界主要国家提升政务人员数字素养的主要策略。借鉴国际经验,未来我国政府可采取梯次衔接、结构合理的政务人员数字素养提升路径:建构指标体系、建设系统平台、促进多元协同,以助力提升我国全民数字素养,实现“数字中国”的伟大战略目标。

关键词：数字素养数字中国数字政府政务人员国际经验

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金属与塑料激光连接的研究现状与展望

机械工程学报 2020年第6期56卷 85-94页

作者：檀财旺苏健晖冯紫微陈波宋晓国冯吉才哈尔滨工业大学先进焊接与连接国家重点实验室哈尔滨150001 哈尔滨工业大学(威海)山东省特种焊接技术重点实验室威海264209

总结了近年来金属与塑料激光连接的国内外研究成果,分别从工艺研究、温度场模拟、气泡产生及抑制和接头性能调控等四个方面分析了金属与塑料激光连接的难点及存在的主要问题。首先对金属与塑料的连接工艺进行讨论,阐明激光功率、焊接速... 详细信息

总结了近年来金属与塑料激光连接的国内外研究成果,分别从工艺研究、温度场模拟、气泡产生及抑制和接头性能调控等四个方面分析了金属与塑料激光连接的难点及存在的主要问题。首先对金属与塑料的连接工艺进行讨论,阐明激光功率、焊接速度和离焦量等参数对接头强度的影响,并介绍了工艺参数的优化方法;概括了有限元温度场模拟计算对接头宽度和强度的预测效果;通过总结气泡的产生过程,阐述了其对接头性能的影响;并从金属与塑料的连接机理角度阐述了接头性能调控的手段。最后对金属与塑料的研究目前仍存在的问题进行总结,并对其发展做出展望。

关键词：金属/塑料激光连接温度场模拟气泡性能调控

我国青少年数字素养教育的现状问题与提升路径——基于东中西部中学生深度访谈的NVivo分析

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中国电化教育 2023年第4期 32-41页

作者：李晓静刘祎宁冯紫薇上海交通大学媒体与传播学院上海200240

作为数字鸿沟的关键预测指标,数字素养的提升不仅对青少年发展至关重要,也是我国教育信息化和“十四五”规划中的重要战略。该文旨在考察我国不同地区青少年的数字素养现状与差距,剖析数字素养教育的现存问题与不足,并在深描基础上提出... 详细信息

作为数字鸿沟的关键预测指标,数字素养的提升不仅对青少年发展至关重要,也是我国教育信息化和“十四五”规划中的重要战略。该文旨在考察我国不同地区青少年的数字素养现状与差距,剖析数字素养教育的现存问题与不足,并在深描基础上提出建议措施。该研究采取立意抽样方法,针对来自东部和中西部地区12个省/自治区/直辖市的36位中学生开展深度访谈,并借助NVivo12软件对访谈资料进行数据编码和定性分析。结果发现:我国青少年数字素养水平亟需提升,且东部与中西部青少年的数字素养差距明显,主要体现在数字内容创造、数字化学习和信息素养层面;目前数字素养教育的主要问题在于,智慧校园建设尚不够丰富和智能化、课程不被重视且课程体系建设不足、社会支持有限等三方面。该文建议,未来需不断完善我国数字素养的测评框架,重点培养学生的数字内容创造、数字化学习、数字安全等技能;数字素养教育需在拓展技术应用场景、课程体系建设、构建多方协作联动机制等方面加强努力。

关键词：青少年数字素养数字素养教育深度访谈 NVivo分析

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专门用语的借用及其原因、条件

南京师范专科学校学报 1999年第2期15卷 29-35页

作者：冯子薇南京师专.教院南京210017

专门用语通过借用产生非专业语义的新义进入社会通用语词库是积极的语言现象。本文对专门用语的借用、借用的原因和条件等方面,予以初步阐述。

关键词：专门用语借用专业语义非专业语义