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B2-CuZr reinforced amorphous alloy matrix composites:A review

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China Foundry 2025年第1期22卷 1-11页

作者： Wei Guo Run-hua Huang Zhen Zhang mi zhao Jin-cheng Wang Yan-qiang Qiao Shu-lin Lü Shu-sen Wu State Key Lab of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an 710072China School of Aerospace Engineering Huazhong University of Science and TechnologyWuhan 430074China Research Institute of Huazhong University of Science and Technology in Shenzhen Shenzhen 518057GuangdongChina

B2-CuZr phase reinforced amorphous alloy matrix composites has become one of the research hotspots in the field of materials science due to the“transformation-induced plasticity”phenomenon,which makes the composites show better macroscopic plastic deformability and obvious work-hardening behavior compared to the conventional amorphous alloy matrix composites reinforced with ductile ***,the in-situ metastable B2-CuZr phase tends to undergo eutectoid decomposition during solidification,and the volume fraction,size,and distribution of B2-CuZr phase are difficult to control,which limits the development and application of these *** date,much efforts have been made to solve the above problems through composition optimization,casting parameter tailoring,and post-processing *** this study,a review was given based on relevant studies,focusing on the predictive approach,reinforcing mechanism,and microstructure tailoring methods of B2-CuZr phase reinforced amorphous alloy matrix *** research focus and future prospects were also given for the future development of the present composite system.

关键词： amorphous alloy matrix composite B2-CuZr phase plasticity microstructure tailoring

基于CLD-COA-ELM的光伏阵列故障诊断方法研究

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太阳能学报 2025年第1期46卷 632-640页

作者：张健赵咪黄毅李景云石河子大学机械电气工程学院石河子832003 新疆天富金阳新能源有限责任公司石河子832000

为提升光伏阵列故障诊断的准确率,提出一种基于改进长鼻浣熊优化算法优化极限学习机的光伏阵列故障诊断方法。首先,分析阵列中光伏组件在发生故障时的输出特性,选择合适的故障特征;其次,针对极限学习机在光伏阵列故障分类时初始权值和... 详细信息

为提升光伏阵列故障诊断的准确率,提出一种基于改进长鼻浣熊优化算法优化极限学习机的光伏阵列故障诊断方法。首先,分析阵列中光伏组件在发生故障时的输出特性,选择合适的故障特征;其次,针对极限学习机在光伏阵列故障分类时初始权值和阈值的随机性问题,采用长鼻浣熊优化算法求解最优的初始权重和阈值;进一步地,针对长鼻浣熊算法初始参数的随机性和全局搜索能力的局限性问题,通过Circle混沌映射、莱维飞行和动态折射反向学习对该算法进行优化,提高寻优精度和速度;最后,结合光伏阵列故障实验数据,验证故障诊断模型的分类效果。结果表明,对于训练集和测试集数据,该诊断模型提高了故障分类精度,诊断率分别达到100%和98.33%,优于传统极限学习机、BP神经网络、支持向量机和卷积神经网络故障诊断的准确率。

关键词：光伏组件故障分析特征选择监督学习极限学习机改进长鼻浣熊优化算法

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低活化中/高熵合金的研究进展与展望

中国有色金属学报 2025年第2期35卷 353-367页

作者：李龙丰郭威赵觅吕书林吴树森华中科技大学材料科学与工程学院材料成形与模具技术全国重点实验室武汉430074 深圳华中科技大学研究院深圳518057 华中科技大学航空航天学院武汉430074

核能的发展对解决世界能源问题意义重大,现代核反应堆对核用材料提出了更加严苛的要求,亟需开发具备低活化特性的新型结构材料。中/高熵合金因其低活化、高强度、良好延展性、抗辐照与耐腐蚀等特性,成为有力的候选材料之一。本文围绕具... 详细信息

核能的发展对解决世界能源问题意义重大,现代核反应堆对核用材料提出了更加严苛的要求,亟需开发具备低活化特性的新型结构材料。中/高熵合金因其低活化、高强度、良好延展性、抗辐照与耐腐蚀等特性,成为有力的候选材料之一。本文围绕具有低活化特性的中/高熵合金,针对合金成分设计与相组成、力学性能与辐照性能开展综述,对低活化中/高熵合金体系研究进展做了全面的总结与展望,指出现有研究中的不足,为低活化中/高熵合金的设计与开发提供思路。

关键词：低活化中/高熵合金成分设计力学性能辐照性能

Seismic and vibration control of segmented isolation layer in underground structure-diaphragm wall system

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Underground Space 2024年第6期19卷 72-86页

作者： Zhidong Gao mingbo Li mi zhao Xiuli Du Key Laboratory of Urban Security and Disaster Engineering of ministry of Education Beijing University of TechnologyBeijing 100124China Department of Hydraulic Engineering Tsinghua UniversityBeijing 100084China

In this paper,a seismic and vibration reduction measure of subway station is developed by setting a segmented isolation layer between the sidewall of structure and the diaphragm *** segmented isolation layer consists of a rigid layer and a flexible *** rigid layer is installed at the joint section between the structural sidewall and slab,and the flexible layer is installed at the remaining sections.A diaphragm wall-segmented isolation layer-subway station structure system is *** and vibration control performance of the diaphragm wall-segmented isolation layer-subway station structure system is evaluated by the detailed numerical ***,a three-dimensional nonlinear time-history analysis is carried out to study the seismic response of the station structure by considering the effect of different earthquake motions and stiffness of segmented isolation ***,the vibration response of site under training loading is also studied by considering the influence of different train velocities and stiffness of the segmented isolation *** results demonstrate that the diaphragm wall-segmented isolation layer-subway station structure system can not only effectively reduce the lateral deformation of station structure,but also reduce the tensile damage of the roof *** the other hand,the developed reduction measure can also significantly reduce the vertical peak displacements of site under training loading.

关键词： Subway station Diaphragm wall Segmented isolation layer Seismic response Train vibration

Efficient seismic analysis for nonlinear soil-structure interaction with a thick soil layer

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Earthquake Engineering and Engineering Vibration 2021年第3期20卷 553-565页

作者： Gao Zhidong zhao Xu zhao mi Du Xiuli Wang Junjie Liu Pengcheng Key Laboratory of Urban Security and Disaster Engineering of ministry of Education Beijing University of TechnologyBeijing 100124China College of Civil Engineering Tongji UniversityShanghai 200092China

The direct finite element method is a type commonly used for nonlinear seismic soil-structure interaction(SSI)*** method introduces a truncated boundary referred to as an artificial boundary meant to divide the soil-structure system into finite and infinite *** artificial boundary condition is used on a truncated boundary to achieve seismic input and simulate the wave radiation effect of infinite *** the soil layer is particularly thick,especially for a three-dimensional problem,the computational efficiency of seismic SSI analysis is very low due to the large size of the finite element model,which contains an whole thick soil *** this paper,an accurate and efficient scheme is developed to solve the nonlinear seismic SSI problem regarding thick soil *** process consists of nonlinear site response and SSI *** nonlinear site response analysis is still performed for the whole thick soil *** artificial boundary at the bottom of the SSI analysis model is subsequently relocated upward from the bottom of the soil layer(bedrock surface)to the location nearest to the structure as ***,three types of typical sites and underground structures are adopted with seismic SSI analysis to evaluate the accuracy and efficiency of the proposed efficient analysis scheme.

关键词： soil-structure interaction thick soil layer efficient analysis absorbing boundary

Seismic stability of jointed rock slopes under obliquely incident earthquake waves

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Earthquake Engineering and Engineering Vibration 2018年第3期17卷 527-539页

作者： Huang Jingqi zhao mi Xu Chengshun Du Xiuli Jin Liu zhao Xu School of Civil and Environmental Engineering University of Science and Technology Beijing Key Laboratory of Urban Security and Disaster Engineering of ministry of Education Beijing University of Technology

Seismic stability of slopes has been traditionally analyzed with vertically propagated earthquake ***,for rock slopes,the earthquake waves might approach the outcrop still with a evidently oblique *** investigate the impact of obliquely incident earthquake excitations,the input method for SV and P waves with arbitrary incident angles is conducted,respectively,by adopting the equivalent nodal force method together with a viscous-spring ***,the input method is introduced within the framework of ABAQUS software and verified by a numerical *** SV and P waves input are considered herein for a 2 D jointed rock *** the jointed rock mass,the jointed material model in ABAQUS software is employed to simulate its behavior as a *** of the study show that the earthquake incident angles have significance on the seismic stability of jointed rock *** larger the incident angle,the greater the risk of slope ***,the stability of the jointed rock slopes also is affected by wave types of earthquakes heavily.P waves induce weaker responses and SV waves are shown to be more critical.

关键词： jointed rock slope seismic stability obliquely incident waves P and SV waves

Nonlinear Response of Tunnel Portal under Earthquake Waves with Different Vibration Directions

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Computer Modeling in Engineering & Sciences 2022年第6期131卷 1289-1314页

作者： Hongyun Jiao mi zhao Jingqi Huang Xu zhao Xiuli Du Key Laboratory of Urban Security and Disaster Engineering of ministry of Education Beijing University of TechnologyBeijing100124China Beijing Key Laboratory of Urban Underground Space Engineering School of Civil and Resource EngineeringUniversity of Science and Technology BeijingBeijing100083China Beijing Key Laboratory of Earthquake Engineering and Structural Retrofit Beijing University of TechnologyBeijing100124China

Tunnel portal sections often suffer serious damage in strong earthquake *** waves may propagate in different directions,producing various dynamic responses in the tunnel *** on the Galongla tunnel,which is located in a seismic region of China,three-dimensional seismic analysis is conducted to investigate the dynamic response of a tunnel portal subjected to earthquake waves with different vibration *** order to simulate the mechanic behavior of slope rock effectively,an elastoplastic damage model is adopted and applied to ABAQUS software by a self-compiled user material(UMAT)***,the seismic wave input method for tunnel portal is established to realize the seismic input under vertically incident earthquake waves with different vibration directions,e.g.,S waves with a vibration direction perpendicular or parallel to the tunnel axis and P waves with a vibration direction perpendicular to the tunnel *** numerical results indicate that the seismic response and damage mechanisms of the tunnel portal section are related to the vibration direction of the earthquake *** vertically incident S waves running perpendicular to the tunnel axis,the hoop tensile strain at the spandrel and arch foot and the hoop shear strain at the vault and arch bottom are the main contributors to the plastic damage of the *** strain is initially concentrated around the tunnel foot and spandrel,before shifting to the tunnel vault and bottom farther away from the tunnel *** vertically incident S waves running parallel to the tunnel axis,very large hoop shear strain and plastic damage appear at the tunnel *** strain first increases and then decreases with distance from the tunnel *** vertically incident P waves running perpendicular to the tunnel axis,the maximum damage factor of the slope rock and the maximum plastic strain of the tunnel are significantly lower than for S ***,with increasing dista

关键词： Tunnel portal earthquake dynamic numerical analysis vibration direction elastoplastic damage model seismic input method

鸽圆环病毒可视化LAMP检测方法的建立与应用

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中国兽医科学 2025年第1期55卷 39-47页

作者：赵谜徐飞飞郑丹阳赵治钤程瑞熊超王军穆杨西北农林科技大学动物医学院凯鸽融汇生物科技(西安)有限公司

以鸽圆环病毒（Pi CV） Rep基因高度保守区为靶标设计环介导等温扩增（LAMP）引物，以甲酚红为指示剂，经条件优化和特异性、敏感性评价等，建立了Pi CV的可视化LAMP检测方法，并采用建立的Pi CV可视化LAMP方法和常规PCR方法分别对35份... 详细信息

以鸽圆环病毒（Pi CV） Rep基因高度保守区为靶标设计环介导等温扩增（LAMP）引物，以甲酚红为指示剂，经条件优化和特异性、敏感性评价等，建立了Pi CV的可视化LAMP检测方法，并采用建立的Pi CV可视化LAMP方法和常规PCR方法分别对35份鸽临床样品进行Pi CV检测并对检测结果进行对比。采用建立的方法在64℃反应60 min后再85℃作用10 min，即可通过目测反应液颜色变化判定检测结果。阳性反应管的反应液由紫红色变为橙色，阴性管反应液颜色不变。采用建立的方法检测鸽腺病毒、鸽疱疹病毒、鸽痘病毒和鸽Ⅰ型副黏病毒等均未出现交叉反应；该方法的最低检测限为17.4 copies/μL重组质粒，表明该方法的灵敏度是常规PCR方法的100倍。采用建立的方法检出Pi CV阳性样品16份，常规PCR方法检出阳性样品15份，说明本研究中建立的Pi CV可视化LAMP方法可应用于临床检测，为方便快捷地诊断鸽圆环病毒病提供了技术支持。

关键词：鸽圆环病毒可视化环介导等温扩增甲酚红建立

Nonlinear Seismic Response of Rock Tunnels Crossing Inactive Fault under Obliquely Incident Seismic P Waves

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Journal of Earth Science 2021年第5期32卷 1174-1189页

作者： Hongyun Jiao Xiuli Du mi zhao Jingqi Huang Xu zhao Wenlong Ouyang Key Laboratory of Urban Security and Disaster Engineering of ministry of Education Beijing University of TechnologyBeijing 100124China Beijing Key Laboratory of Urban Underground Space Engineering School of Civil and Resource EngineeringUniversity of Science and Technology BeijingBeijing 100083China Beijing Key Laboratory of Earthquake Engineering and Structural Retrofit Beijing University of TechnologyBeijing 100124China

The failure mechanism of tunnels crossing faults is a critical issue for tunnels located in seismically active regions. This study aims to investigate the nonlinear response of rock tunnels crossing inactive faults under obliquely incident seismic P waves. Based on the equivalent nodal force method together with the viscous-spring boundary, an incident method for the site, which contains fault and is subjected to obliquely incident seismic P waves, is developed first. Then, based on the proposed incident method, the nonlinear response and the failure process of the tunnel crossing inactive fault are numerically studied. The numerical results show that the failure mechanism of the tunnel crossing inactive fault can be attributed to the combined action of the seismic waves and its associated fault slippage. Finally, parameter studies are conducted to investigate the effects of the wave impedance ratio of the fault to the surrounding rock and the incident angle of P waves. By the parameter analysis, it can be concluded that:(1) with decreasing the wave impedance ratio of the fault to the surrounding rock, the seismic response of the tunnel increases significantly;(2) the seismic response of the tunnel increases first and then decreases with the increasing of the incident angle of P waves. This study offers the insight for further research on the seismic stability of tunnels crossing inactive faults.

关键词： tunnel inactive fault earthquake P wave nonlinear seismic response