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Journal of Iron and Steel Research International 2024年第8期31卷 2053-2067页

作者： kang zhou Wen-xiao Yu Bao-kai Ren Gang Wang School of Mechatronical Engineering Beijing Institute of TechnologyBeijing 100081China

Online estimation of the double nugget diameters was performed by means of a back propagation neural *** double nugget diameters were obtained using actual welding experiment and numerical simulation,according to different characteristics of aluminum nugget and steel *** input of the neural network was some key characteristic parameters extracted from dynamic power signal,which were peak point,knee point and their variation rate over time,as well as heat energy delivered into the welding *** architecture of the neural network was confirmed by confirming the number of neurons in hidden layer through a series of *** key parameters of the neural network were obtained by means of training 81 arrays of data ***,the neural network was used to test the remaining 20 arrays of verifying data set,and the results showed that both of the mean errors for the two nugget diameters were below 3%.In addition,corresponding analyses showed that the accuracy of two nugget diameters was higher than that of tensile-shear strength.

关键词： Resistance spot welding Aluminum Steel Double nugget Dynamic power signal.Neural network

Deep Global Multiple-Scale and Local Patches Attention Dual-Branch Network for Pose-Invariant Facial Expression Recognition

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Computer Modeling in Engineering & Sciences 2024年第4期139卷 405-440页

作者： Chaoji Liu Xingqiao Liu Chong Chen kang zhou School of Electrical and Information Engineering Jiangsu UniversityZhenjiang212013China School of Electrical Engineering Yancheng Institute of TechnologyYancheng224051China

Pose-invariant facial expression recognition(FER)is an active but challenging research topic in computer *** with the involvement of diverse observation angles,FER makes the training parameter models inconsistent from one view to *** study develops a deep global multiple-scale and local patches attention(GMS-LPA)dual-branch network for pose-invariant FER to weaken the influence of pose variation and selfocclusion on recognition *** this research,the designed GMS-LPA network contains four main parts,i.e.,the feature extraction module,the global multiple-scale(GMS)module,the local patches attention(LPA)module,and the model-level fusion *** feature extraction module is designed to extract and normalize texture information to the same *** GMS model can extract deep global features with different receptive fields,releasing the sensitivity of deeper convolution layers to pose-variant and *** LPA module is built to force the network to focus on local salient features,which can lower the effect of pose variation and self-occlusion on recognition ***,the extracted features are fused with a model-level strategy to improve recognition *** experimentswere conducted on four public databases,and the recognition results demonstrated the feasibility and validity of the proposed methods.

关键词： Pose-invariant FER global multiple-scale(GMS) local patches attention(LPA) model-level fusion

An improved installation of 2-hydroxy-4-methoxybenzyl(iHmb)method for chemical protein synthesis

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Chinese Chemical Letters 2024年第5期35卷 145-150页

作者： Ying Li Long-Jie Wang Yong-kang zhou Jun Liang Bin Xiao Ji-Shen Zheng The First Affiliated Hospital of USTC MOE Key Laboratory for Membraneless Organelles and Cellular DynamicsDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefei 230001China Department of Chemistry University of Science and Technology of ChinaHefei 230027China

The 2-hydroxy-4-methoxybenzyl(Hmb)backbone modification can prevent amide bond-mediated sidereactions(e.g.,aspartimide formation,peptide aggregation)by installing the removable Hmb group into a peptide bond,thus improving the synthesis of long and challenging peptides and ***,its use is largely precluded by the limited Hmb’s installation *** this report,an improved installation of Hmb(iHmb)method was developed to achieve the flexible installation and the convenient removal of *** iHmb method involves two critical steps:(1)oxidative diazotization of the readily installed 2-hydroxy-4-methoxy-5-amino-benzyl(Hmab)to give 2-hydroxy-4-methoxy-5-diazonium-benzyl(Hmdab)by combining soamyl nitrite(IAN)/HBF_(4),and(2)reductive elimination of Hmdab to give the desired Hmb by 1,2-ethanedithiol(EDT).The iHmb method enables the installation of Hmb at any primary amino acid including the highly sterically hindered amino acids(e.g.,valine and isoleucine).The practicality and utility of the iHmb method was demonstrated by one-shot solid-phase synthesis of a challenging aspartimide-prone peptide,the mirror-image version of a hydrophobic peptide and a long-chain peptide up to ***,the iHmb method can be utilized to facilitate chemical protein ligation,as exemplified by the synthesis of the single-spanning membrane protein *** iHmb method expands the toolkit for peptide synthesis and ligation and facilitates the preparation of peptides/proteins.

关键词： Chemical protein synthesis Solid-phase peptide synthesis Removable backbone modification 2-Hydroxy-4-methoxybenzyl(Hmb)group Aspartimide-prone peptides Difficult peptides Membrane proteins

A MOF built on 8-connected Y3 nodes demonstrates simultaneous reverse adsorptive separation: ethane over ethylene and propane over propylene

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Science China Chemistry 2024年第11期67卷 3657-3661页

作者： Lu-Lu Ma Jiaqi Liu kang zhou Zixuan Cao Jiafeng Miao Guo-Ping Yang Yao-Yu Wang Jing Li Hao Wang Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education Shaanxi Key Laboratory of PhysicoInorganic Chemistry College of Chemistry & Materials Science Northwest University Hoffmann Institute of Advanced Materials Shenzhen Polytechnic University Shenzhen Senior High School Department of Chemistry and Chemical Biology Rutgers University

Selective adsorption of paraffins over olefins（mostly C2 and C3） by porous solids could offer tremendous advantages for the purification of olefins, which is, however, challenging as it has stringent requirements on the pore dimensions and pore surface chemistry of the adsorbent. We report here a metal-organic framework（MOF） with novel topology, Y3（μ3-OH）(TCMPB)2(denoted as HIAM-316, TCMPB4-= 1,2,4,5-tetra（4-carboxy-3-methylphenyl）benzene), which shows reversed separation of C2H6/C2H4and C3H8/C3H6simultaneously. The ideal adsorbed solution theory（IAST） selectivities for equimolar binary mixtures of C2H6/C2H4and C3H8/C3H6were calculated to be 1.67 and 1.23 at 1 bar and 298 K for HIAM-316. Its capability of removing paraffines from paraffin/olefin mixtures is validated by breakthrough measurements. Molecular simulations reveal that the preferential adsorption of paraffins over olefins by HIAM-316 may be attributed to the abundant carboxylate oxygen atoms along its channel.

关键词： metal-organic framework adsorption separation

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基于动力源分类的无人机起飞方式综述

兵器装备工程学报 2024年第1期45卷 148-158页

作者：郑济沅周亢北京理工大学机电学院北京100081

无人机的起飞方式在作战中是个关键因素,决定了无人机作战的灵活性、机动性和高效性等。随着科技的发展,无人机的起飞方式已由最初的滑跑起飞更新换代至多种多样。对无人机起飞方式进行了研究,根据动力源不同将无人机起飞方式分为势能... 详细信息

无人机的起飞方式在作战中是个关键因素,决定了无人机作战的灵活性、机动性和高效性等。随着科技的发展,无人机的起飞方式已由最初的滑跑起飞更新换代至多种多样。对无人机起飞方式进行了研究,根据动力源不同将无人机起飞方式分为势能膨胀力作为动力源起飞、电磁力作为动力源起飞、气体反冲力作为动力源起飞和人力作为动力源起飞4大类。对每种无人机起飞方式的工作原理和优缺点进行了详细阐释并列举出了相应的无人机型号,对无人机起飞技术的发展趋势进行了展望。

关键词：无人机动力源起飞装置弹射垂直起飞

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特高压输电系统中的状态监测技术应用

集成电路应用 2024年第6期41卷 172-173页

作者：周康国网扬州供电公司江苏225000

阐述特高压输电线路状态监测技术特点,包括杆塔倾斜监测、风振监测、线路视频在线监测、绝缘子污秽在线监测技术。探讨状态监测技术在监测雷电、环境、微风振动中的应用。

关键词：特高压输电线路检测技术

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输电系统中的自动化技术应用

集成电路应用 2024年第6期41卷 168-169页

作者：周康国网扬州供电公司江苏225000

阐述输电工程中自动化技术的特点,分析电力系统输电自动化技术管理的状况。探讨自动化控制技术在输电工程中的应用策略,包括自动重合分段器、馈线自动化、远程自动化控制的应用。

关键词：输电工程自动化控制远程控制

新兴技术和人口老龄化对劳动力跨省流动的影响

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中国人口科学 2024年第3期38卷 34-49页

作者：周康邹杰玲张俊森浙江大学经济学院

中国经济正在进行一系列结构性调整,新兴技术发展、人口老龄化与人口流动呈现出新的趋势。文章基于2000~2015年人口普查和小普查微观数据,研究了新兴技术和人口老龄化对劳动力跨省流动规模的影响。研究发现,新兴技术和人口老龄化是驱动... 详细信息

中国经济正在进行一系列结构性调整,新兴技术发展、人口老龄化与人口流动呈现出新的趋势。文章基于2000~2015年人口普查和小普查微观数据,研究了新兴技术和人口老龄化对劳动力跨省流动规模的影响。研究发现,新兴技术和人口老龄化是驱动中国劳动力跨省流动的重要因素。新兴技术更倾向于吸引年轻、高技能劳动力,同时通过互补作用吸纳更多低技能劳动力。人口老龄化使城市更依赖本地富有经验的中年劳动力和中低技能劳动力,但同时也通过产业转型升级增加对高技能劳动力的需求。此外,人口老龄化可以强化新兴技术对劳动力跨省流动的拉力作用。文章研究结论为优化劳动力资源配置、应对人口老龄化挑战提供了理论与实践参考,也为理解新兴技术发展和人口老龄化对中国劳动力空间配置的影响提供了实证依据。

关键词：流动人口跨省流动新兴技术人口老龄化

基于n阶S形曲线的SCARA多目标运动规划

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组合机床与自动化加工技术 2024年第1期 14-18,24页

作者：吴坤王明威周康郑州工商学院工学院郑州454000 郑州大学机械与动力工程学院郑州450001

为了对SCARA机器人运动过程中产生的振动进行有效抑制,首先,建立了SCARA机器人的简化浮动坐标法动力学模型;然后,利用n阶S形曲线构造了同时对定位时间和SCARA机器人受到的冲击进行优化的多目标优化模型;最后,采用基于Kriging模型的NSGA... 详细信息

为了对SCARA机器人运动过程中产生的振动进行有效抑制,首先,建立了SCARA机器人的简化浮动坐标法动力学模型;然后,利用n阶S形曲线构造了同时对定位时间和SCARA机器人受到的冲击进行优化的多目标优化模型;最后,采用基于Kriging模型的NSGA-Ⅱ算法对优化问题进行求解。得到的多目标优化问题的Pareto前沿表明,四阶S形曲线的定位时间与三阶S形曲线大致相当,但是引起的冲击远小于三阶S形曲线。对优化结果的仿真也表明,以四阶S形曲线驱动的SCARA机器人运行过程更平滑,产生的残余振动也远小于三阶S形曲线。研究表明,四阶S形曲线具备比三阶S形曲线更加优良的振动抑制性能,在工程中具有广泛的应用价值。

关键词：机械电子工程 SCARA机器人振动抑制运动规划 n阶S形曲线

高校“一站式”学生社区协同育人模式构建的现实困境和实践路径——基于协同治理理论的视角

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安康学院学报 2024年第5期36卷 111-116页

作者：周康冯瑞马鞍山学院经济与管理学院安徽马鞍山243100

“一站式”学生社区是新形势下高校育人的重要场域。目前高校“一站式”学生社区协同育人模式构建仍处于初步发展阶段,在构建过程中发现了诸多问题和挑战,“一站式”学生社区系统发挥协同育人实效面临制度困境、主体困境和资源困境。基... 详细信息

“一站式”学生社区是新形势下高校育人的重要场域。目前高校“一站式”学生社区协同育人模式构建仍处于初步发展阶段,在构建过程中发现了诸多问题和挑战,“一站式”学生社区系统发挥协同育人实效面临制度困境、主体困境和资源困境。基于此,高校应学习和运用协同治理理论,从理论和实践上探索优化路径,促进党建引领、主体融合、资源下沉、管理集成,深化对“一站式”学生社区协同育人模式构建的思考和探索。

关键词： “一站式”学生社区协同育人模式构建思想政治教育