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Design of advanced steels by integrated computational materials engineering

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Materials Genome Engineering Advances 2024年第2期2卷 39-52页

作者： Xiao-Gang Lu yanlin he Weisen Zheng School of Materials Science and Engineering Shanghai UniversityShanghaiChina

The integrated computational materials engineering(ICME)has achieved great success in accelerating the rational design and deployment of new *** is a new route of designing new materials and processes and highlighted by Materials Genome Initiative/Engineering that stresses the high-throughput computation in addition to high-throughput experimentation and materials *** article presents a brief review on the basic theories and multi-scale computational tools of ICME to design advanced steel grades,including the first-principles calculations,the CALPHAD method(i.e.,computational thermodynamics)fueled by dedicated databases,diffusion and phase-field simulations,as well as finite analysis methods and machine *** the ICME scheme to deal with steels,the CALPHAD method is considered as the core to readily consider multi-component systems and integrated to link the microscopic simulations(such as diffusion and phase field method to predict microstructure evolutions in response to external conditions)and macroscopic finite analysis method to deal with mechanical *** applications are also presented to address the new routes to carry out materials design,especially for advanced steels.

关键词： CALPHAD ICME integrated database MGE steel

面向连续体机器人精密操作的多芯光纤三维形状与位置测量误差研究

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机械工程学报 2024年第3期60卷 68-82页

作者：孙广开张兴硕何彦霖周康鹏祝连庆北京信息科技大学光电测试技术及仪器教育部重点实验室北京100192 北京信息科技大学光纤传感与系统北京实验室北京100016 天津大学精密仪器与光电子工程学院天津300072

针对复杂封闭空间精密操作中连续体机器人三维形状与位置高精度测量问题,提出基于多芯光纤形变传感方程与三维形状重构算法的误差分析及校正方法。基于多芯光纤传感结构特征和三维空间几何变换原理,推演建立了多芯光纤三维形状与位置测... 详细信息

针对复杂封闭空间精密操作中连续体机器人三维形状与位置高精度测量问题,提出基于多芯光纤形变传感方程与三维形状重构算法的误差分析及校正方法。基于多芯光纤传感结构特征和三维空间几何变换原理,推演建立了多芯光纤三维形状与位置测量的关键方程和算法。采用关键模型算法驱动方法,系统性地分析了传感光纤关键参数误差、信号解调误差、传感方程与重构算法误差、环境温度变化等对测量精度的影响,确定了主要误差源及其定量影响程度。通过误差溯源,建立了测量系统关键参数标定与误差校正方法。构建了七芯光纤测量实验装置,实验验证了方法有效性。研究结果表明,所提方法可实现系统测量误差溯源、定量分析与校正,有效提高多芯光纤三维形状与位置测量精度,在连续体机器人精密测量领域具有应用价值与前景。

关键词：连续体机器人精密测量多芯光纤传感器三维形状测量误差分析

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超表面偏振器件研究进展与展望

光电工程 2024年第8期51卷 112-135页

作者：王皓萱何彦霖祝航威董杭王书凝北京信息科技大学光电测试技术及仪器教育部重点实验室北京100192 广州南沙光子感知技术研究院广东广州511462 大连交通大学机车车辆工程学院辽宁大连116028

偏振作为光的基本特性之一,其产生、调控和探测被广泛应用于通信、成像、光学加密等领域。然而传统的偏振器件存在体积大、集成度低等问题。亚波长尺度的超表面由于其独特的光场调控机制,为偏振器件的小型化和低成本提供了创新性的解决... 详细信息

偏振作为光的基本特性之一,其产生、调控和探测被广泛应用于通信、成像、光学加密等领域。然而传统的偏振器件存在体积大、集成度低等问题。亚波长尺度的超表面由于其独特的光场调控机制,为偏振器件的小型化和低成本提供了创新性的解决方案。本文对近年来基于超表面的偏振器件研究进展及超表面制备工艺进行综述。从超表面相位调控机理入手,简单介绍了传输相位、几何相位、广义几何相位和共振相位的调控方法,重点总结了偏振转换、偏振分束、矢量涡旋光发生器、高阶庞加莱球光学加密、偏振多通道全息、偏振探测等不同超表面偏振器件及其制备工艺,最后展望了该领域可能的发展趋势和应用前景。

关键词：偏振器件超表面偏振探测多功能复用相位调控

基于全方位深层加权轻量化网络的冠脉造影图像超分辨率重建方法

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仪器仪表学报 2024年第7期45卷 200-209页

作者：张博伟何彦霖王康黄宇辰祝连庆北京信息科技大学光电测试技术与仪器教育部重点实验室北京100192 北京信息科技大学广州南沙光子感知技术研究院北京511462

针对介入手术中对冠状动脉造影图像纹理清晰的需求,本文提出一种基于全方位深层加权轻量化网络的超分辨率图像重建方法。首先通过设计局部卷积模块,降低特征图的维度减小其参数量,加快模型的处理速度;接着采用自注意力机制模块,融合图... 详细信息

针对介入手术中对冠状动脉造影图像纹理清晰的需求,本文提出一种基于全方位深层加权轻量化网络的超分辨率图像重建方法。首先通过设计局部卷积模块,降低特征图的维度减小其参数量,加快模型的处理速度;接着采用自注意力机制模块,融合图像的通道和空间信息,获得图像的丰富高频细节特征;此外,为了进一步提取图像的深层特征信息,研究设计了级联和权重匹配的层注意力结构,为图像不同深度的特征分配不同的权重,实现图像的超分辨率重建。最后为了使本文所研究方法在真实介入手术冠脉造影图像中有更强的泛化能力,本文构建了冠脉造影图像数据集(CAID)用于网络模型的训练和测试。实验测试结果表明,与Omni-SR算法相比,本文所提出算法在参数量减少32.3%、运行时间减少17.74%的同时,其重建图像的质量在客观指标和主观感受上均优于其他对比算法,且在放大倍数为4时,PSNR和SSIM的平均值在CAID数据集上分别提高了0.72 dB和0.012 2,在公共数据集上分别提高了0.13 dB和0.004 4。

关键词：冠脉造影图像超分辨率重建局部卷积注意力机制轻量化

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提升建筑设计课程案例教学效能的策略探究

科教导刊 2024年第5期 45-47页

作者：何艳林马焱卫红河南农业大学风景园林与艺术学院河南郑州450002

建筑设计是一门实践性较强且与现实生活发展相适应的课程,将案例教学法应用于“建筑设计”教学,有助于学生将理论与实践结合,学以致用,掌握动态信息,紧跟社会发展的步伐。文章基于建筑设计课程的实践性特征以及案例教学法的优势,阐述了... 详细信息

建筑设计是一门实践性较强且与现实生活发展相适应的课程,将案例教学法应用于“建筑设计”教学,有助于学生将理论与实践结合,学以致用,掌握动态信息,紧跟社会发展的步伐。文章基于建筑设计课程的实践性特征以及案例教学法的优势,阐述了在建筑设计教学中实施案例教学法的必要性,通过分析案例教学法在实践过程中效能不佳的原因,提出了提高其效能的策略,即加强案例库的建设与管理、注重案例师资队伍的培养、着力拓展案例教学方法。

关键词：案例教学法城乡规划建筑设计课程教学效能

Computer Simulation of Fe-Al-Si System Diffusion Couples

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Journal of Materials Science & Technology 2011年第8期27卷 729-734页

作者： Zhongping he yanlin he YiGao Lin Li Shuigen Huang Omer Van der Blest School of Materials Science and Engineering Shanghai University Shanghai 200072 China Cold Rolling Plant of Ansteel Anshan 114021 China Department of Metallurgy and Materials Engineering Katholieke Universiteit Leuven Kasteelpark Arenberg 44 B-3001 Heverlee Belgium

DifFusion couples, Fe-6.8 wt% Al-1.0 wt% Si/Fe and Fe-6.3 wt% Al-0.9 wt% Si/Fe were constructed and separately annealed at 1050℃ for 3 h and at 1000℃ for 64 h. The concentration profiles of Fe, Al and Si atoms in these couples were measured by electron probe micro-analysis （EPMA）, while the diffusion behavior was also simulated by coupling thermodynamic and kinetic properties of Fe-Al-Si system. The simulation results were in good agreement with the measured concentration profiles showing the validity of dynamic parameters of Fe-Al-Si system, Calculation was made for Fe-7 wt% Al-1 wt% Si/Fe diffusion couples at 1000℃ with different diffusion time. Silicon uphill was found under the influence of aluminum.

关键词： Diffusion kinetics Fe-Al-Si system Thermo-calc and DICTRA

Hyperactivity of a midbrain dopamine to 5-HT circuit causes anorexia

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Journal of Molecular Cell Biology 2022年第5期14卷 63-64页

作者： Hailan Liu Xing Cai yanlin he Yong Xu Department of Pediatrics Children's Nutrition Research CenterBaylor College of MedicineHoustonTX 77030USA Kunming Institute of Zoology Chinese Academy of SciencesKunming 650201China Brain Glycemic and Metabolism Control Department Pennington Biomedical Research CenterLouisiana State UniversityBaton RougeLA 70808USA Department of Molecular and Cellular Biology Baylor College of MedicineHoustonTX 77030USA

Anorexia nervosa(AN)is a severe eating disorder that can eventually lead to death,buteffective the rapiesare missing dueto a lack of knowledge about its ***(DA)neurons in theventral tegmental area(VTA)and serotonin(5-HT)neurons in the dorsal Raphe nucleus(DRN)play essential roles in the control of eating and have been reported to be as sociated with human AN(Zhou and Palmiter,1995;Xu et al.,2017;Watson et al.,2019;he et al.,2021).

关键词： al. Watson dopamine

Research on the Low-order Control Strategy of the Power System With Time Delay

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IEEE/CAA Journal of Automatica Sinica 2018年第2期5卷 501-508页

作者： Xinyi Yu Xuejinfeng Hong Jun Qi Linlin Ou yanlin he Department of Automation Zhejiang University of Technology

In this paper, the design problem of the low-order controller is considered for the power system with a fixed time delay. A linear model of the power system with time delay is firstly established. Then the proportional-integral-differential(PID) controller, which is the typical low-order controller, is designed to improve the stability of the power system. The stabilizing region of the PID controller is obtained. The control parameters chosen arbitrarily in the resultant region can ensure the stability of the power system. Finally, based on the stabilizing result, the PID controller satisfying the H∞performance index is designed, which improves the robustness of the whole power system. The main advantage of the proposed method lies in that there is no need to approximate the model of the power *** method can be further extended to the power system which is more complex.

关键词： Index Terms-Power system proportional-integral-differential(PID) controller stability time delay.

Thermodynamic Assessment and Experimental Investigation of Fe-Al-C System

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Journal of Materials Science & Technology 2008年第5期24卷 771-774页

作者： Weiyan LU Lin LI Li WANG yanlin he Shuigen HUANG School of Mat＇erial Science and Engineering Shanghai University Shanghai 200072 China Technology Center Steel Products Institute Baosteel Shenyang 201900 China MTM Katholieke Universiteit Leuven Heverlee B-3001 Belgium

Phase diagram information of the Fe-C, Fe-Al and Al-C systems are reviewed and the Fe-Al-C system is assessed. A FeAlC database is created by combining a set of thermodynamic parameters established by Kumar and SSOL database in Thermo-Calc software package. Ternary phase diagrams are calculated with FeAIC and the newly developed Thermo-Calc databases SSOL2 and SSOL4. The FeAIC database is the best one to describe the Fe-Al-C system. Al and A3 values on the vertical section containing 1.5 wt pct AI are calculated with the FeAIC database in this work. To validate the thermodynamic calculation, critical temperatures Ac1 and Ac3 are determined by using dilatometer analysis. There exist some errors between the calculated values and the experimental results. So further optimization of the Fe-Al-C system regarding bcc and fcc phases is necessary. The experimental data in this work could be of some value in further optimization.

关键词： Fe-Al-C Phase diagram TRIP steel