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Nuclear Science and Techniques 2020年第6期31卷 11-21页

作者： Ying-Chao Ma xie-lin zhao Xian-Hui Ye Nai-Bin Jiang Jin-Xiong Zhou State Key Laboratory for Strength and Vibration of Mechanical Structures School of AerospaceXi’an Jiaotong UniversityXi’an 710049China Key Laboratory of Nuclear Reactor System Design Technology Nuclear Power Institute of ChinaChengdu 610200China Sino-French Institute of Nuclear Engineering and Technology Sun Yat-Sen UniversityZhuhai 519082China

A loss-of-coolant accident(LOCA)is one of the basic design considerations for nuclear reactor safety analysis.A LOCA induces propagation of a depressurization wave in the coolant,exerting hydrodynamic forces on structures viafiuid–structure interaction(FSI).The analysis of hydrodynamic forces on the core structures during a LOCA process is *** describe the implementation of a numerical strategy for prestressed *** consists of an initialization and a restarted transient analysis process,all implemented via the ANSYS Workbench by system coupling of ANSYS and *** strategy is validated by making extensive comparisons of the pressures,displacements,and strains on various locations between the simulation and reported *** approach is appealing for dynamic analysis of other prestressed structures,owing to the good popularity and acknowledgement of ANSYS and Fluent in both academia and industry.

关键词： Loss-of-coolant accident(LOCA) Fluid–structure interaction(FSI) Finite element method Prestressed structure Structural dynamics

基于模态分析的静电驱动圆薄板宏模型建立方法

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传感技术学报 2006年第5A期19卷 1368-1371页

作者：林谢昭应济浙江大学微系统研究与发展中心

为了研究静电致动圆板静态和动态特性,在模态分析法的基础上,利用多维非线性函数的Levenberg-Marquardt拟合方法,将板的动能、弹性能和电容写成以模态坐标表示的解析式.结合Hamilton原理,导出静电致动微圆板的动力学特性方程的宏模型.... 详细信息

为了研究静电致动圆板静态和动态特性,在模态分析法的基础上,利用多维非线性函数的Levenberg-Marquardt拟合方法,将板的动能、弹性能和电容写成以模态坐标表示的解析式.结合Hamilton原理,导出静电致动微圆板的动力学特性方程的宏模型.以此为基础研究了板的静态特性及其三角波、方波信号激励下的动态响应.结果表明,模态分析方法能够考虑到残余应力的影响,所建立的动态宏模型不仅大大地减少了计算费用,而且具有足够的仿真精度.

关键词：微机电系统(MEMS) 宏模型模态分析方法静电驱动

Channel pruning on frequency response

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Science China(Information Sciences) 2025年第1期68卷 159-170页

作者： Hang lin Yifan PENG lin BIE Chenggang YAN Xibin zhao Yue GAO School of Software Tsinghua University School of Automation Hangzhou Dianzi University

Network pruning has a significant role in reducing network parameters and accelerating the inference time of the network. Some existing methods prune the network based on the frequency of the data, and finally obtain a sub-network with high accuracy. However, according to our experimental analysis, different frequencies of information in the data contribute differently to the accuracy of the model, and using this information directly for pruning without making a selection will lead to incorrect results. We believe that pruning should retain the convolutional kernels in the network that process important information, while those kernels that process unimportant information should be removed. In this paper, we first investigate the meaning of each frequency band information in the spectrum and their contribution to the prediction accuracy of the network,and according to these results, we propose a new pruning method based on frequency response(PFR). Our PFR finds and removes the convolutional kernels in the network that specialize in processing unimportant information, resulting in a compact neural network model. PFR obtains significant experimental results on different datasets, for example, a 56.0% raduction of float points operations(FLOPs) on Res Net-50 and only 0.37% of Top-1 accuracy degradation on the Image Net dataset.

关键词： deep learning model compression filter pruning channel pruning frequency response

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Engineering nanoparticle structure at synergistic Ru-Na interface for integrated CO2 capture and hydrogenation

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Journal of Energy Chemistry 2025年第1期100卷 779-791页

作者： Hanzi Liu ling Cen Xinlin xie Lei Liu zhao Sun Zhiqiang Sun Hunan Engineering Research Center of Clean and Low-Carbon Energy Technology School of Energy Science and Engineering Central South University

The development of dual functional material for cyclic CO2capture and hydrogenation is of great significance for converting diluted CO2into valuable fuels,but suffers from kinetic limitation and deactivation of adsorbent and ***,we engineered a series of RuNa/γ-Al2O3materials,varying the size of ruthenium from single atoms to clusters/*** coordination environment and structure sensitivity of ruthenium were quantitatively investigated at atomic *** findings reveal that the reduced Ru nanoparticles,approximately 7.1 nm in diameter with a Ru-Ru coordination number of 5.9,exhibit high methane formation activity and selectivity at 340°*** Ru-Na interfacial sites facilitate CO2migration through a deoxygenation pathway,involving carbonate dissociation,carbonyl formation,and ***-situ experiments and theoretical calculations show that stable carbonyl intermediates on metallic Ru nanoparticles facilitate heterolytic C–O scission and C–H bonding,significantly lowering the energy barrier for activating stored CO2.

关键词： Carbon capture and utilization

Recent development in electrode design for wide-temperature supercapacitors

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Science China Chemistry 2025年第1期68卷 96-117页

作者： Jianhong Liu Qiang Zhou Yuxiao lin Xinsheng zhao Guangmin Zhou Xiaoxiao Li School of Physics and Electronic Engineering Jiangsu Normal University Tsinghua-Berkeley Shenzhen Institute & Tsinghua Shenzhen International Graduate School Tsinghua University

An ever-increasing market demand has stimulated the soaring enthusiasm of researchers to develop wide-temperature supercapacitors(SCs). The active electrode is one of the most important parts of SC, which is directly related to the energy density,power transmission and long-term cyclability of the device in the wide-temperature environment. Compared with the SC electrodes aimed for room-temperature application, the SC electrodes for operating at wide-temperature scene often face greater challenges. In this review, the main challenges of SC electrodes under various temperature conditions, including low, high and cross-fade temperatures, are summarized. The relevant performance decay and failure mechanisms of wide-temperature SC electrodes are analyzed. In addition, this review deals with the recent studies and developments in robust wide-temperature SC electrodes with respect to the rational design of electrode structures and the exploitation of advanced active materials. Finally, the future directions for exploring reliable wide-temperature SCs are also proposed.

关键词： supercapacitor wide-temperature electrode design active materials

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静电无阀微泵两种仿真模型的比较研究

哈尔滨工业大学学报 2010年第12期42卷 1943-1947页

作者：林谢昭应济陈子辰福州大学机械自动化学院福州350002 浙江大学机械与能源工程学院杭州310027

为提高无阀微泵性能,分别采用全耦合模型(FCM)和预先定义泵膜位移的模型(PDM)对基于扩散/收缩单元的静电无阀微泵的动态特性进行计算仿真.对泵膜变形形状、泵膜中点位移、泵腔内压力以及进出口处流量等的变化历程进行比较.结果表明:PDM... 详细信息

为提高无阀微泵性能,分别采用全耦合模型(FCM)和预先定义泵膜位移的模型(PDM)对基于扩散/收缩单元的静电无阀微泵的动态特性进行计算仿真.对泵膜变形形状、泵膜中点位移、泵腔内压力以及进出口处流量等的变化历程进行比较.结果表明:PDM模型计算费用较低,但无法以较高精度近似泵膜变形的动态特性,进而导致错误的瞬态流场结果.要准确仿真微泵的动态特性,必须考虑电-结构-流场之间的相互作用.

关键词：静电无阀微泵静电-结构-流体耦合 MEMSCAD

用于系统级仿真的MEMS器件宏模型研究现状

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传感器与微系统 2008年第4期27卷 8-11页

作者：林谢昭应济福州大学机械工程及自动化学院福建福州350002 浙江大学机械与能源工程学院浙江杭州310027

微机电系统(MEMS)的未来在于有稳定数量且不断壮大的新型产品能成功地转化为商品,这关键在于将计算机引入到MEMS设计、制造全过程。阐述了MEMS CAD的复杂性和困难。对MEMS CAD的分层设计思想作了简要介绍,着重对现有的MEMS器件宏模型的... 详细信息

微机电系统(MEMS)的未来在于有稳定数量且不断壮大的新型产品能成功地转化为商品,这关键在于将计算机引入到MEMS设计、制造全过程。阐述了MEMS CAD的复杂性和困难。对MEMS CAD的分层设计思想作了简要介绍,着重对现有的MEMS器件宏模型的建模方法和模型的描述与其国内外研究现状与发展方向进行介绍和总结,认为宏模型研究的重点将是器件非线性特性的有效表达和建模过程自动化的计算机实现,并对今后的研究发展提出一些建议。

关键词：宏模型系统级模拟计算机辅助设计微机电系统

Unraveling the significance of cobalt on transformation kinetics,crystallography and impact toughness in high-strength steels

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 380-390页

作者： Yishuang Yu Jingxiao zhao Xuelin Wang Hui Guo Zhenjia xie Chengjia Shang Collaborative Innovation Center of Steel Technology University of Science and Technology BeijingBeijing 100083China School of Materials Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China

This work reveals the significant effects of cobalt(Co)on the microstructure and impact toughness of as-quenched highstrength steels by experimental characterizations and thermo-kinetic *** results show that the Co-bearing steel exhibits finer blocks and a lower ductile-brittle transition temperature than the steel without ***,the Co-bearing steel reveals higher transformation rates at the intermediate stage with bainite volume fraction ranging from around 0.1 to *** improved impact toughness of the Co-bearing steel results from the higher dense block boundaries dominated by the V1/V2 variant ***,the addition of Co induces a larger transformation driving force and a lower bainite start temperature(BS),thereby contributing to the refinement of blocks and the increase of the V1/V2 variant *** findings would be instructive for the composition,microstructure design,and property optimization of high-strength steels.

关键词： high-strength steel cobalt transformation kinetics crystallography impact toughness

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预应力机架连接螺纹的不同牙型力学特性分析

机械设计 2015年第10期32卷 91-95页

作者：林谢昭林秋伟福州大学机械工程及自动化学院福建福州350108 福建海源自动化机械股份有限公司福建福州350101

预应力压机机架中,拉杆/圆螺母螺纹连接的疲劳断裂是机架的主要失效形式。对连接螺纹的有限元分析是机架设计的重要内容。在考虑了材料的弹塑性特性的基础上,建立了不同牙型螺纹连接的轴对称模型,对不同啮合螺纹对建立摩擦接触关系。研... 详细信息

预应力压机机架中,拉杆/圆螺母螺纹连接的疲劳断裂是机架的主要失效形式。对连接螺纹的有限元分析是机架设计的重要内容。在考虑了材料的弹塑性特性的基础上,建立了不同牙型螺纹连接的轴对称模型,对不同啮合螺纹对建立摩擦接触关系。研究了不同牙型承载螺纹的应力和变形分布规律,探讨了不同牙型对啮合螺纹牙根部的应力集中、等效应力峰值及轴向载荷分布不均匀性的影响。较大的牙根过渡圆弧半径、良好的牙间载荷分布均匀性和设置合适的螺纹退刀卸荷槽,都能够有效地降低螺纹牙根部的等效应力峰值,进而提高螺纹的疲劳寿命。为大型压机螺纹连接结构设计提供了理论指导。

关键词：螺纹连接弹塑性接触液压机机架

“Zero‑Strain” NiNb_(2)O_(6) Fibers for All‑Climate Lithium Storage

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Nano-Micro Letters 2025年第1期17卷 348-360页

作者： Yan zhao Qiang Yuan Liting Yang Guisheng Liang Yifeng Cheng Limin Wu Chunfu lin Renchao Che College of Physics Donghua UniversityShanghai 201620People’s Republic of China School of Materials Science and Engineering Institute of Materials for Energy and EnvironmentQingdao UniversityQingdao 266071People’s Republic of China Laboratory of Advanced Materials Shanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsAcademy for Engineering&TechnologyFudan UniversityShanghai 200438People’s Republic of China Zhejiang Laboratory Hangzhou 311100People’s Republic of China Inner Mongolia University Hohhot 010021People’s Republic of China

Niobates are promising all-climate Li^(+)-storage anode material due to their fast charge transport,large specific capacities,and resistance to electrolyte ***,their moderate unit-cellvolume expansion(generally 5%–10%)during Li^(+)storage causes unsatisfactory long-term ***,“zero-strain”NiNb_(2)O_(6) fibers are explored as a new anode material with comprehensively good electrochemical *** Li^(+)storage,the expansion of electrochemical inactive NiO_(6) octahedra almost fully offsets the shrinkage of active NbO_(6) octahedra through reversible O *** superior volume-accommodation capability of the NiO_(6) layers guarantees the“zero-strain”behavior of NiNb_(2)O_(6) in a broad temperature range(0.53%//0.51%//0.74%at 25//−10//60℃),leading to the excellent cyclability of the NiNb_(2)O_(6) fibers(92.8%//99.2%//91.1%capacity retention after 1000//2000//1000 cycles at 10C and 25//−10//60℃).This NiNb_(2)O_(6) material further exhibits a large reversible capacity(300//184//318 mAh g−1 at 0.1C and 25//−10//60℃)and outstanding rate performance(10 to 0.5C capacity percentage of 64.3%//50.0%//65.4%at 25//−10//60℃).Therefore,the NiNb_(2)O_(6) fibers are especially suitable for large-capacity,fast-charging,long-life,and all-climate lithium-ion batteries.

关键词： NiNb_(2)O_(6)porous fiber “Zero-strain”mechanism Electrochemical property Harsh-temperature operation Operando characterization