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On-chip topological transport of integrated optical frequency combs

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Photonics Research 2025年第1期13卷 163-176页

作者： ZHEN jiang HONGWEI WANG PENG XIE YUECHEN YANG YANG SHEN BO JI YANGHE CHEN YONG ZHANG LU SUN ZHENG WANG chun jiang YIKAI SU GUANGQIANG HE State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University SJTU Pinghu Institute of Intelligent Optoelectronics Department of Electronic Engineering Shanghai Jiao Tong University School of Electrical & Electronic Engineering Nanyang Technological University State Key Laboratory of Precision Spectroscopy East China Normal University

Optical frequency combs in integrated photonics have widespread applications in high-dimensional optical computing, high-capacity communications, high-speed interconnects, and other paradigm-shifting ***, quantum frequency combs with high-dimensional quantum states are vulnerable to decoherence, particularly in the presence of perturbations such as sharp bends. Here we experimentally demonstrate the robust onchip topological transport of quantum frequency combs in valley photonic crystal waveguides. By measuring the time correlations and joint spectral intensity of the quantum frequency combs, we show that both quantum correlations and frequency entanglement remain robust against sharp bends, owing to the topological nature of the quantum valley Hall effect. We also demonstrate that dissipative Kerr soliton combs with a bandwidth of 20 THz maintain their spectral envelope and low-noise properties even in the presence of structure perturbations. These topologically protected optical frequency combs offer robust, complex, highly controllable, and scalable light sources, promising significant advances in high-dimensional photonic information processing.

关键词： Electron beam lithography Frequency combs Integrated photonics Optical computing Photonic crystal waveguides Polarization control

教育家精神引领地方师范院校文化育人的内在逻辑与创新路径研究

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教育探索 2025年第1期 19-24页

作者：李春江牡丹江师范学院黑龙江牡丹江157000

地方师范院校文化育人工作影响未来广大一线教师的教育素质与文化面貌,发挥教育家精神在其中的引领作用是其创新基点。基于“文化·教育·实践”三重环境视角分析发现,当前地方师范院校文化育人实践面临多元文化环境中的目标协调不畅、... 详细信息

地方师范院校文化育人工作影响未来广大一线教师的教育素质与文化面貌,发挥教育家精神在其中的引领作用是其创新基点。基于“文化·教育·实践”三重环境视角分析发现,当前地方师范院校文化育人实践面临多元文化环境中的目标协调不畅、弱势教育环境中的育人要素乏力、复杂实践环境中的实践效能不足等三大问题。内涵丰富的教育家精神蕴含着引领地方师范院校文化育人的三重逻辑:教育家精神的文化内核与目标协同逻辑、教育家精神的教育意蕴与素养提升逻辑、教育家精神的实践力量与乡土扎根逻辑。通过凝练H省M校的实践路径发现,地方师范院校需要以教育家精神引领特色化育人目标确立,以教育家精神支撑高质量教师队伍建设,以教育家精神融入全过程实践育人体系。

关键词：教育家精神文化育人地方师范院校

Anisotropic Curl-free Wavelet Bases on the Unit Cube

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Acta Mathematica Sinica,English Series 2013年第4期29卷 801-814页

作者： Ying chun jiang School of Mathematics and Computational Science Guilin University of Electronic Technology

This paper deals with the construction of anisotropic curl-free wavelets on the cube [0,1]3, which satisfies the specific boundary conditions. First, one constructs curl-free wavelets on the unit cube based on one dimensional wavelets on the interval [0,1] with some boundary conditions. Then, the stability of the corresponding wavelets in curl-free space and the characterization of Sobolev spaces are studied. Finally, one gives a Helmholtz decomposition and the representation of curl and div operators in wavelet coordinates.

关键词： Wavelets anisotropic curl-free cube Helmholtz decomposition

机用镍钛锉结合超声荡洗在乳磨牙牙髓炎根管治疗中的应用

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中国美容医学 2025年第2期34卷 167-170页

作者：江春周键斈南京明基医院口腔科江苏南京210000

目的:研究机用镍钛锉结合超声荡洗在乳磨牙牙髓炎根管治疗中的应用效果,分析其对根管清洁度、炎性因子的影响。方法:选取2021年1月-2022年12月南京明基医院就诊的100例乳磨牙牙髓炎患儿,均进行根管填充治疗,按随机数字表法分为观察组和... 详细信息

目的:研究机用镍钛锉结合超声荡洗在乳磨牙牙髓炎根管治疗中的应用效果,分析其对根管清洁度、炎性因子的影响。方法:选取2021年1月-2022年12月南京明基医院就诊的100例乳磨牙牙髓炎患儿,均进行根管填充治疗,按随机数字表法分为观察组和对照组,每组50例。观察组采取机用镍钛锉结合超声荡洗行根管治疗,对照组单纯采取机用镍钛锉治疗。比较两组术后根管预备与填充效果、根管清洁度,ELISA检测龈沟液中炎性因子水平变化,记录根管预备、治疗时间和术后疼痛程度。结果:两组根管手术成功率、根管预备时间与治疗时间比较差异均无统计学意义(P>0.05);观察组根管恰填率、预备良好率均高于对照组,疼痛发生率及根尖、根中和根冠处面积占比均低于对照组(P<0.05);术后,两组龈沟液IL-1β、IL-6与TNF-α水平均低于术前,且观察组低于对照组(P<0.05)。结论:机用镍钛锉联合超声荡洗可改善乳磨牙牙髓炎根管预备、填充效果,提高根管清洁度,预防牙龈炎症反应,减轻术后疼痛。

关键词：镍钛锉超声荡洗乳磨牙牙髓炎根管清洁度炎性因子

Numerical Study on Flow Heat Transfer Characteristics of Horizontal Tube Falling-Film Evaporator

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Journal of Thermal Science 2021年第4期30卷 1302-1317页

作者： XU Bo jiang chun CHEN Zhenqian School of Energy and Environment Southeast UniversityNanjing 210096China jiangsu Provincial Key Laboratory of Solar Energy Science and Technology School of Energy and EnvironmentSoutheast UniversityNanjing 210096China Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and EnvironmentSoutheast UniversityNanjing 210096China

As an efficient and energy-saving heat exchange technology, horizontal tube falling film evaporation has a great application prospect in refrigeration and air conditioning. The three-dimensional models of falling film flow evaporation outside horizontal single tube and inside evaporator were established, and the accuracy of flow and heat transfer simulation process was verified by comparison. For horizontal single tube, the results showed that total heat transfer coefficient was low and increased with larger spray density and evaporation temperature. The thickness of liquid film outside tube decreased gradually with the increase of tube diameter, and the total heat transfer coefficient of small tube diameter was significantly greater than that of the large tube diameter. The total heat transfer coefficient presented an increasing trend with larger liquid distribution height and density. In addition, the fluctuation of tube axial liquid film thickness distribution decreased with larger liquid distribution density. For evaporator, the results indicated that part of liquid refrigerant was carried into the vapor outlet. The temperature of tube wall and fluid presented a gradually rising trend in vertical downward direction, while tube wall temperature within the same horizontal and transverse row had little difference. The high-temperature zone on the outer wall of heat exchange tube moved towards the inlet and gradually decreased, and the outlet temperature of water in the tube also gradually decreased with the increase of refrigerant spray density. The local heat transfer coefficient of heat exchanger tube in the vertical direction presented a downward trend which was more obvious with the smaller spray density and it was obviously higher located in the middle of upper tube row and both sides of lower tube row for horizontal tube rows.

关键词： horizontal single tube evaporator falling film numerical simulation heat transfer

Ultra-thin Glass Film Coated with Graphene: A New Material for Spontaneous Emission Enhancement of Quantum Emitter

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Nano-Micro Letters 2015年第3期7卷 261-267页

作者： Lu Sun chun jiang State Key Laboratory of Advanced Optical Communication System and Networks Shanghai Jiao Tong University

We propose an ultra-thin glass film coated with graphene as a new kind of surrounding material which can greatly enhance spontaneous emission rate(SER) of dipole emitter embedded in it. With properly designed parameters,numerical results show that SER-enhanced factors as high as 1.286 9 106 can be achieved. The influences of glass film thickness and chemical potential/doping level of graphene on spontaneous emission enhancement are also studied in this paper. A comparison is made between graphene and other coating materials such as gold and silver to see their performances in SER enhancement.

关键词： Graphene surface plasmons Graphene plasmonics Quantum electrodynamics Superradiance Subwavelength structures

Synergistic Catalysis with Azomethine Ylides

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Chinese Journal of Chemistry 2021年第1期39卷 15-24页

作者： Liang Wei chun-jiang Wang Engineering Research Center of Organosilicon Compounds&Materials Ministry of EducationCollege of Chemistry ond Molecular SciencesWuhan UniversityWuhanHubei 430072China State Key Laboratory of Elemento organic Chemistry Nankoi UniversityTionjin 300071China

Azomethine ylides are useful intermediates for the rapid construction of chiral N-containing ***,its synthetic potential has not been fully developed due to the limited reaction *** combination with synergistic catalysis and azomethine ylide chemistry,we have developed several types of novel catalytic system including Cu/Pd,Cu/Ir and PTC/Ir catalysis;which can convert readily-available azomethine ylides to various high-valued molecules such as unnatural a-amino acids,homoallylic amines and *** with the traditional mono-catalysis,the synergistic catalyst system exhibits enhanced catalytic efficiency and chiral induction ability in many *** addition,we have demonstrated that these strategies could be applied in the construction of bioactive compounds and natural products.

关键词： Azomethine ylides Synergistic catalysis Asymmetric synthesis N-Heterocycles α-Amino acids

Unitary Equivalence,Similarity and Calculation of K_0-Group

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Acta Mathematica Sinica,English Series 2005年第6期21卷 1259-1268页

作者： Hua HE chun Lan jiang Department of Applied Mathematics Hebei University of Technology Tianjin 300130 P. R. China Academy of Mathematics and Systems Science Chinese Academy of ScienceBeijing 100080 P. R. China

In this paper, we are concerned with the classification of operators on complex separable Hilbert spaces, in the unitary equivalence sense and the similarity sense, respectively. We show that two strongly irreducible operators A and B are unitary equivalent if and only if W＊（A＋B）′≈M2（C）, and two operators A and B in B1（Ω） are similar if and only if A′（AGB）/J≈M2（C）. Moreover, we obtain V（H^∞（Ω,μ）≈N and Ko（H^∞（Ω,μ）≈Z by the technique of complex geometry, where Ω is a bounded connected open set in C, and μ is a completely non-reducing measure on Ω.

关键词： Strongly irreducible operators Cowen-Douglas operator Holomorphic complex bundle,Grassmann manifold K0-group

Adaptive Wavelet Solution to the Stokes Problem

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Acta Mathematicae Applicatae Sinica 2008年第4期24卷 613-626页

作者： Ying-chun jiang Youming Liu College of Mathematics and Computer Sciences Guilin University of Electronic Technology Cuilin 541004 China Department of Applied Mathematics Beijing University of Technology Beijing 100022 China

This paper deals with the design and analysis of adaptive wavelet method for the Stokes problem. First, the limitation of Richardson iteration is explained and the multiplied matrix M0 in the paper of Bramble and Pasciak is proved to be the simplest possible in an appropiate sense. Similar to the divergence operator, an exact application of its dual is shown; Second, based on these above observations, an adaptive wavelet algorithm for the Stokes problem is designed. Error analysis and computational complexity are given; Finally, since our algorithm is mainly to deal with an elliptic and positive definite operator equation, the last section is devoted to the Galerkin solution of an elliptic and positive definite equation. It turns out that the upper bound for error estimation may be improved.

关键词： Richardson iteration adaptive algorithm wavelets Stokes problem Galerkin solution