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Influence of Parameters in the Design of a Faceted Structure for Incoherent Beam Shaping

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Journal of Microelectronic Manufacturing 2021年第4期4卷 1-11页

作者： Lihong Liu Thierry Engel- Huwen Ding yuanzhi cui Jing Zhang Yayi Wei Manuel Flury Institute of Microelectronics Chinese Academy of SciencesBeijingChina100029 Laboratoire des Sciences de llngenieur de I'lnformatique et de I'lmagerie(Icube)UMR CNRS 7357300 Boulevard Sebastien BrantCS1041367412 Illkirch CedexFrance INSA de Strasbourg 24 Boulevard de la Victoire67084 Strasbourg CedexFrance University of Chinese Academy of Sciences BeijingChina101408 International School for Optoelectronic Engineering Qilu University of Technology(Shandong Academy of Sciences)No.3501 University RoadJinanShandongChina250353 North China University of Technology BeijingChina100144

A reflective faceted structure is proposed to reshaping an incoherent light beam into two focalized spots-To obtain the desired irradiance distribution on a detector,custom optimization function is written,and the two dimensional tilt angles of each facet are optimized automatically in a pure non-sequential mode in Zemax OpticStudio *** result is also confirmed inside LightTools&2 from *** measuring the quality of the optimization result in the case of two spots focalization,four factors including efficiency on the detector,uniformity,the root mean square error and the correlation coefficient are *** four factors are used to evaluate the influence of several parameters on the irradiance *** parameters include the incidence angle,the divergence angle,the facet size,the source type and the resolution of the facet angular ***,an analysis of those parameters is made and the performance of this type of component is demonstrated.

关键词： Incoherent beam shaping micro lens array custom optimization

Mapping the antiparallel aligned domain rotation by microwave excitation

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Chinese Physics B 2024年第9期33卷 599-605页

作者： Jing Zhang yuanzhi cui Xiaoyu Wang Chuang Wang Mengchen Liu Jie Xu Kai Li Yunhe Zhao Zhenyan Lu Lining Pan Chendong Jin Qingfang Liu Jianbo Wang Derang Cao College of Physics Qingdao UniversityQingdao 266071China National Demonstration Center for Experimental Applied Physics Education Qingdao UniversityQingdao 266071China SKLSM Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China College of Chemistry Chemical Engineering and Resource UtilizationNortheast Forestry UniversityHarbin 150040China Hunan Provincial Key Laboratory of Intelligent Sensors and Advanced Sensor Materials School of Physics and ElectronicsHunan University of Science and TechnologyXiangtan 411201China CAS Key Laboratory of Magnetic Materials and Devices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China Key Laboratory of Optic-Electronic Information and Materials of Hebei Province Research Center for Computational PhysicsCollege of Physics Science and TechnologyHebei UniversityBaoding 071002China Key Laboratory for Magnetism and Magnetic Materials of Ministry of Education Lanzhou UniversityLanzhou 730000China Key Laboratory of Special Functional Materials and Structural Design Ministry of EducationLanzhou UniversityLanzhou 730000China

The evolution process of magnetic domains in response to external fields is crucial for the modern understanding and application of *** this study,we investigated the domain rotation in stripe domain films of varying thicknesses by examining their response to microwave excitation in four different *** resonance spectra indicate that the rotation field of stripe domain film under an applied magnetic field approaches the field where the resonance mode of sample *** saturation field of the stripe domain film corresponds to the field where the resonance mode disappears when measured in the stripe direction parallel to the microwave magnetic *** results are reproducible and consistent with micromagnetic simulations,providing additional approaches and techniques for comprehending the microscopic mechanisms of magnetic domains and characterizing their rotation.

关键词： stripe domain magnetic film microwave excitation micromagnetic simulation

金属板中基于线性超声相控阵列的损伤检测研究

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电子科技 2017年第10期30卷 33-38页

作者：崔媛智李默江苏大学土木工程与力学学院江苏镇江212013

金属板结构由于在使用过程中受到外界载荷作用极易产生缺陷,而目前对结构初期损伤的实时动态监测仍存在一定困难。超声相控阵阵列检测技术不仅具有较高灵敏度,还具有对损伤进行动态聚焦、提升检测信号信噪比和损伤成像分辨率等优点。通... 详细信息

金属板结构由于在使用过程中受到外界载荷作用极易产生缺陷,而目前对结构初期损伤的实时动态监测仍存在一定困难。超声相控阵阵列检测技术不仅具有较高灵敏度,还具有对损伤进行动态聚焦、提升检测信号信噪比和损伤成像分辨率等优点。通过对线性相控阵列参数进行优化设计,结合Lamb波频率调谐理论,使用频散效应弱的单一S0模态Lamb波,应用相控阵逐点扫描算法,通过仿真和实验两种手段针对板中贯穿刻槽损伤进行精确定位并成像,结果显示,该算法可对损伤所在方位及走向做出判断,得到较高质量的损伤评估检测信息。为各类大型板状结构长期稳定工作提供理论指导和实验支持。

关键词：线性超声相控阵 S0模态阵列参数优化损伤成像

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基于频率调谐和相控阵的金属板损伤检测

压电与声光 2018年第1期40卷 128-133页

作者：崔媛智骆英徐桂东徐晨光王自平江苏大学土木工程与力学学院高端装备关键结构健康管理国际联合研究中心江苏镇江212013

基于兰姆(Lamb)波的无损检测方法已成为板类结构损伤检测的重要手段之一。然而,Lamb波的多模态与频散特性,使其在传播及信号处理方面有很大的复杂性。该文将Lamb波应用于线性相控阵损伤检测研究,采用频率调谐理论,获得频散效应弱的S_0波... 详细信息

基于兰姆(Lamb)波的无损检测方法已成为板类结构损伤检测的重要手段之一。然而,Lamb波的多模态与频散特性,使其在传播及信号处理方面有很大的复杂性。该文将Lamb波应用于线性相控阵损伤检测研究,采用频率调谐理论,获得频散效应弱的S_0波,对板状结构中裂纹型刻槽损伤,进行直观成像和精确定位。仿真与实验表明,频率调谐法可优选出弱频散的S_0模态用于损伤检测,结合线性相控阵列,可对损伤类型及方位做出判断,得到有效的损伤检测信息。

关键词：超声兰姆(Lamb)波 S0模态线性相控阵损伤成像

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季戊四醇产品中杂质检测与脱除研究

合肥工业大学学报（自然科学版） 2017年第3期40卷 409-413页

作者：李正星姚路路陈远芝崔鹏合肥工业大学化学与化工学院安徽合肥230009

针对工业季戊四醇产品颜色发黄的现象,文章通过核磁共振、拉曼光潽、液质联用等检测手段,确定产品中主要杂质为双季戊四醇、少量多季戊四醇、季戊四醇甲醇醚以及微量的缩醛和酯类化合物。对比12种树脂吸附处理工业季戊四醇样品,优选出... 详细信息

针对工业季戊四醇产品颜色发黄的现象,文章通过核磁共振、拉曼光潽、液质联用等检测手段,确定产品中主要杂质为双季戊四醇、少量多季戊四醇、季戊四醇甲醇醚以及微量的缩醛和酯类化合物。对比12种树脂吸附处理工业季戊四醇样品,优选出强碱性阴离子大孔吸附树脂D201,优化了静态和动态吸附工艺条件。研究结果表明:D201树脂在温度25℃、用量0.67g/L、吸附时间为60min的静态吸附条件下,季戊四醇纯度和白度分别提高至94.34%、99%;在温度25℃、吸附剂床层高径比3∶1、停留时间4 min的动态吸附条件下,纯度和白度分别提升至95.06%、98.9%。

关键词：季戊四醇杂质检测脱除

基于遗传算法的不规则天然气管道支承件位置避振优化

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石化技术 2024年第7期31卷 137-139页

作者：王东海孟彤崔媛智中国特种设备检测研究院北京100029

以多支承的天然气管道为研究对象,在有限元建模过程中通过引入弹簧单元来模拟管道支承件的力学特性。在避振优化部分,以管道系统1阶固有频率最大为优化目标,将支承件位置转换为节点编号作为设计变量,支承件的可移动范围作为约束条件。... 详细信息

以多支承的天然气管道为研究对象,在有限元建模过程中通过引入弹簧单元来模拟管道支承件的力学特性。在避振优化部分,以管道系统1阶固有频率最大为优化目标,将支承件位置转换为节点编号作为设计变量,支承件的可移动范围作为约束条件。通过遗传算法不断修正管道系统刚度矩阵,从而得到合理的管道支承件位置。

关键词：遗传算法支承件位置避振优化有限元模型

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基于有限元分析的储罐凹坑缺陷风险评估

化工装备技术 2019年第4期40卷 35-38页

作者：张伯君崔媛智文耀华姜君南京市锅炉压力容器检验研究院

以某石化企业因碰撞产生凹坑缺陷的储罐为研究对象,应用有限元分析方法建立其有限元模型。基于第三强度理论,参考JB4732-1995(2005年确认)《钢制压力容器--分析设计标准》中应力分类方法对罐体不同部位进行强度校核,并对该储罐进行风险... 详细信息

以某石化企业因碰撞产生凹坑缺陷的储罐为研究对象,应用有限元分析方法建立其有限元模型。基于第三强度理论,参考JB4732-1995(2005年确认)《钢制压力容器--分析设计标准》中应力分类方法对罐体不同部位进行强度校核,并对该储罐进行风险评估,判断该凹坑的存在是否影响储罐的正常使用。

关键词： ANSYS有限元分析凹坑缺陷应力强度校核风险评估

A Novel Model for Describing Rail Weld Irregularities and Predicting Wheel-Rail Forces Using a Machine Learning Approach

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Computer Modeling in Engineering & Sciences 2025年第1期142卷 555-577页

作者： Linlin Sun Zihui Wang Shukun cui Ziquan Yan Weiping Hu Qingchun Meng State Key Laboratory of High-Speed Railway Track System China Academy of Railway Sciences Corporation LimitedBeijing100081China Railway Engineering Research Institute China Academy of Railway Sciences Corporation LimitedBeijing100081China School of Aeronautic Science and Engineering Beihang UniversityBeijing100191China

Rail weld irregularities are one of the primary excitation sources for vehicle-track interaction dynamics in modern high-speed *** can cause significant wheel-rail dynamic interactions,leading to wheel-rail noise,component damage,and *** researchers have employed the vehicle-track interaction dynamic model to study the dynamic interactions between wheel and rail induced by rail weld geometry ***,the cosine wave model used to simulate rail weld irregularities mainly focuses on the maximum value and neglects the geometric *** this study,novel theoretical models were developed for three categories of rail weld irregularities,based on measurements of the high-speed railway from Beijing to *** vertical dynamic forces in the time and frequency domains were compared under different running *** forces generated by the rail weld irregularities that were measured and modeled,respectively,were compared to validate the accuracy of the proposed ***,based on the numerical study,the impact force due to rail weld irrregularity is modeled using an Artificial Neural Network(ANN),and the optimum combination of parameters for this model is *** results showed that the proposed model provided a more accurate wheel/rail dynamic evaluation caused by rail weld irregularities than that established in the *** ANN model used in this paper can effectively predict the impact force due to rail weld irrregularity while reducing the computation time.

关键词： Rail weld irregularity high-speed railway vehicle-track coupled dynamics wheel/rail dynamic vertical force artificial neural networks

CaH2-promoted activity of Ni-carbonate interface for CO2 methanation

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Journal of Energy Chemistry 2025年第1期100卷 522-532页

作者： Jin-Peng Wang Guo-cui Mao Hui-Lin Jiang Bao-Xia Dong Yun-Lei Teng School of Chemistry and Chemical Engineering Yangzhou University

Transition metal-carbonate interfaces often act as active sites in heterogeneous catalytic *** interface between transition metal and metal carbonate exhibits a dynamic equilibrium during the CO2hydrogenation reaction,involving surface carbonate hydrogenation and ***,there have been few reports on engineering the activity of the interface between transition metal and alkaline earth metal carbonate for catalytic *** work demonstrated that the incorporation of CaH2in Ni/CaCO3enhances the CO2methanation activity of the *** CO2conversion for Ni/CaH2-CaCO3reached 68.5%at 400°C,which was much higher than that of the Ni/CaCO3（31.6%） and Ni/CaH2-CaO （42.4%） ***,the Ni/CaH2-CaCO3catalysts remained stable during the stability test for 24 h at 400°C and 8 *** research revealed that CaH2played a crucial role in promoting the activity of the Ni-carbonate interface for ***2could modify the electronic structure of Ni and tune the structural properties of CaCO3to generate medium basic sites （OH groups）,which are favorable for the activation of H2and ***-situ Fourier transform infrared spectroscopy （FTIR） analysis combined with density functional theory calculations demonstrated that CO2activation occurs at the hydroxyl group （OH） on the CaH2-modified Ni-carbonate surface,leading to the formation of CO3H****,our study has confirmed that CO2methanation over the Ni/CaH2-CaCO3catalysts proceeds via the formate pathway.

关键词： Metal hydride Ni catalysts Carbonate Metal-carbonate interface