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Quality assessment of friction-stir-welded aluminum alloy welds via three-dimensional force signals

Advances in Manufacturing 2024年第1期12卷 61-75页

作者： Ji-Hong Dong Yi-Ming Huang Jia-Lei Zhu Wei Guan xu-kai ren Huan-Wei Yu Lei Cui Beijing Institute of Petrochemical Technology Beijing102617People’s Republic of China Beijing Academy of Safety Engineering and Technology Beijing102617People’s Republic of China AVIC Manufacturing Technology Institute Beijing100024People’s Republic of China Tianjin Key Laboratory of Advanced Joining Technology School of Materials Science and EngineeringTianjin UniversityTianjin300350People’s Republic of China Shaoxing Special Equipment Testing Institute Shaoxing Key Laboratory of Special Equipment Intelligent Testing and EvaluationShaoxing312071ZhejiangPeople’s Republic of China

An online detection technology must be developed for realizing the real-time control of friction stir *** this study,the three-dimensional force exerted on a material during friction stir welding was collected synchronously and the relationship between the forces and welding quality was *** results indicated that the fluctuation period of the traverse force was equal to that of the lateral force during the stable welding *** phase difference between two horizontal forces wasπ/*** values of the horizontal forces increased with welding speed,whereas their amplitudes remained the *** proposed force model showed that the traverse and lateral forces conformed to an elliptical curve,and this result was consistent with the behavior of the measured *** variational mode decomposition was used to process the plunge *** intrinsic mode function that represented the real fluctuation in the plunge force varied at the same frequency as the spindle rotational *** tunnel defects occurred,the fluctuation period features were consistent with those obtained during normal welding,whereas the ratio parameter defined in this study increased significantly.

关键词： Friction stir welding(FSW) Three-dimensional force model Variational mode decomposition Tunnel defect

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OsFY,a Homolog of AtFY,Encodes a Protein that Can Interact with OsFCA-γ in Rice(Oryza sativa L.)

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Acta Biochimica et Biophysica Sinica 2006年第7期38卷 492-499页

作者： Qi LU Zheng-kai xu ren-Tao SONG Shanghai Key Laboratory of Bio-energy Crop,School of Life Sciences,Shanghai University Shanghai 200444,China Shanghai Key Laboratory of Bio-energy Crop School of Life Sciences Shanghai UniversityShanghai 200444 China

FCA and FY are flowering time related genes involved in the autonomous flowering pathwayin *** interacts with FY to regulate the alternative processing of FCA *** FCA/FY interaction is also required for the regulation of FLC expression,a major floral repressor in ***,it is not clear if the regulation of this autonomous flowering pathway is also present in monocotplants,such as ***,alternative RNA processing of OsFCA was observed in rice,which stronglysuggested the existence of an autonomous flowering pathway in *** this work,we cloned the cDNA ofthe autonomous flowering pathway gene OsFY from *** predicted OsFY protein contained a conserved7 WD-repeat region and at least two Pro-Pro-Leu-Pro motifs compared to Arabidopsis *** protein-protein interaction between OsFY and OsFCA-γ,the key feature of their gene function,was also demon-strated using the yeast two-hybrid *** GenBank database search provided evidence of expressionfor other autonomous pathway gene homologs in *** results indicate that the autonomous floweringpathway is present in monocots,and the regulation through FY and FCA interaction is conserved betweenmonocots and dicots.

关键词： OsFY autonomous flowering pathway OsFCA protein interaction yeast two-hybrid

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气象数据检索区域查询优化及并行算法设计

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计算机科学 2017年第3期44卷 42-47页

作者：许婧任开军李小勇国防科技大学计算机学院长沙410073 国防科技大学海洋科学与工程研究院长沙410073

随着数值天气预报水平和分辨率的不断提高,气象科学数据呈海量增长趋势,导致气象资料归档与检索系统(MARS)处理大数据服务请求的效率较低。针对此情况,开展了基于MARS检索区域查询方式的优化研究,结合数学补集思想与多路数组聚集计算原... 详细信息

随着数值天气预报水平和分辨率的不断提高,气象科学数据呈海量增长趋势,导致气象资料归档与检索系统(MARS)处理大数据服务请求的效率较低。针对此情况,开展了基于MARS检索区域查询方式的优化研究,结合数学补集思想与多路数组聚集计算原理,提出了一种高效的补集转换区域查询方法(CTRQ),从而实现大范围区域查询下的"大数据"计算转换为"小数据"计算。其基本思路是通过超立方体聚集维尺寸与区域查询服务请求的属性值集合大小比较,执行"过半求补"的索引计算操作,利用二次求补实现气象场数据物理存储信息的检索。实验表明,相比原始的索引计算方法,该方法能够有效降低数据检索时元数据索引计算的系统开销。在此基础上,结合并行处理方法,设计并实现了CTRQ并行算法,相比其改进后的串行算法最大获得1.9倍加速比,进一步提高了MARS的检索效率。

关键词： MARS 超立方体区域查询元数据索引计算并行处理

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流体切应力对铜绿微囊藻细胞活性的影响

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中国环境科学 2023年第2期43卷 896-903页

作者：刘任静蒋文涛徐凯仁李忠友李潇闵磊梁英四川大学建筑与环境学院四川成都610065 四川大学生物力学工程四川省重点实验室四川成都610065 宜宾四川大学产业技术研究院四川宜宾644000

为讨论流体切应力对铜绿微囊藻细胞活性的影响,本文研究了铜绿微囊藻在0.0,0.3,0.6,0.9Pa切应力作用下的生长情况,并分析了藻细胞生理指标以及藻液指标的变化情况.结果显示,低于0.6Pa的切应力能使藻细胞密度和光合色素含量不断增加,从... 详细信息

为讨论流体切应力对铜绿微囊藻细胞活性的影响,本文研究了铜绿微囊藻在0.0,0.3,0.6,0.9Pa切应力作用下的生长情况,并分析了藻细胞生理指标以及藻液指标的变化情况.结果显示,低于0.6Pa的切应力能使藻细胞密度和光合色素含量不断增加,从而促进铜绿微囊藻的生长繁殖.其中0.6Pa对藻细胞生长最有利,此条件既能提高藻细胞光合作用强度和营养盐利用率,又未过度破坏细胞结构.但0.9Pa高切应力将通过对藻细胞结构的破坏来影响膜渗透性,进而抑制铜绿微囊藻生长与代谢.研究表明,流体切应力对铜绿微囊藻细胞的影响体现为“低促高抑”,即适度切应力能够增强铜绿微囊藻细胞的活性,而高切应力会抑制其生长.本文结果将为湖泊水库等水体铜绿微囊藻水华的预防和治理提供了新的思路和方案.

关键词：水华切应力铜绿微囊藻光合作用细胞膜

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Tailoring Light–Matter Interactions in Overcoupled Resonator for Biomolecule Recognition and Detection

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Nano-Micro Letters 2025年第1期17卷 262-280页

作者： Dongxiao Li Hong Zhou Zhihao ren Cheng xu Chengkuo Lee Department of Electrical and Computer Engineering National University of SingaporeSingapore 117583Singapore Center for Intelligent Sensors and MEMS(CISM) National University of SingaporeSingapore 117608Singapore

Plasmonic nanoantennas provide unique opportunities for precise control of light–matter coupling in surface-enhanced infrared absorption(SEIRA)spectroscopy,but most of the resonant systems realized so far suffer from the obstacles of low sensitivity,narrow bandwidth,and asymmetric Fano resonance ***,we demonstrated an overcoupled resonator with a high plasmon-molecule coupling coefficient(μ)(OC-Hμresonator)by precisely controlling the radiation loss channel,the resonator-oscillator coupling channel,and the frequency detuning *** observed a strong dependence of the sensing performance on the coupling state,and demonstrated that OC-Hμresonator has excellent sensing properties of ultra-sensitive(7.25%nm^(−1)),ultra-broadband(3–10μm),and immune asymmetric Fano *** characteristics represent a breakthrough in SEIRA technology and lay the foundation for specific recognition of biomolecules,trace detection,and protein secondary structure analysis using a single array(array size is 100×100μm^(2)).In addition,with the assistance of machine learning,mixture classification,concentration prediction and spectral reconstruction were achieved with the highest accuracy of 100%.Finally,we demonstrated the potential of OC-Hμresonator for SARS-CoV-2 *** findings will promote the wider application of SEIRA technology,while providing new ideas for other enhanced spectroscopy technologies,quantum photonics and studying light–matter interactions.

关键词： Plasmonic nanoantennas Light-matter interaction Surface-enhanced infrared absorption Overcoupled Biosensing

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氟氧化物玻璃陶瓷不同配位环境下Cr3+的荧光温度传感特性

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硅酸盐学报 2018年第11期46卷 1543-1550页

作者：王长建 Abhishek Wadhwa 陈晓桐徐秀瑕任锴乔旭升樊先平浙江大学材料科学与工程学院

通过对基质成分为50SiO2–20Al2O3–30BaF2的玻璃进行热处理,得到了含BaF2：Cr^3＋纳米晶的透明氟氧化物微晶玻璃。玻璃陶瓷中存在两种发光中心,所对应的发光峰位中心位置分别位于红光区域724 nm处和近红外区域988 nm处。在低温环境下对... 详细信息

通过对基质成分为50SiO2–20Al2O3–30BaF2的玻璃进行热处理,得到了含BaF2：Cr^3＋纳米晶的透明氟氧化物微晶玻璃。玻璃陶瓷中存在两种发光中心,所对应的发光峰位中心位置分别位于红光区域724 nm处和近红外区域988 nm处。在低温环境下对Cr^3＋的荧光寿命与温度的关系进行了探究,724 nm处的荧光寿命的相对敏感系数温度在317 K达到最大值0.58%/K,988 nm处的荧光寿命的相对敏感系数温度在184 K达到最大值0.47%/K。

关键词：铬离子氟氧化物玻璃陶瓷低温温度传感

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Bearing Fault Diagnosis Based on the Markov Transition Field and SE-IShufflenetV2 Model

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Structural Durability & Health Monitoring 2025年第1期19卷 125-144页

作者： Chaozhi Cai Tiexin xu Jianhua ren Yingfang xue School of Mechanical and Equipment Engineering Hebei University of EngineeringHandan056038China

A bearing fault diagnosis method based on the Markov transitionﬁeld(MTF)and SEnet(SE)-IShufﬂenetV2 model is proposed in this paper due to the problems of complex working conditions,low fault diagnosis accuracy,and poor generalization of rolling ***,MTF is used to encode one-dimensional time series vibration sig-nals and convert them into time-dependent and unique two-dimensional feature ***,the generated two-dimensional dataset is fed into the SE-IShufﬂenetV2 model for training to achieve fault feature extraction and classiﬁ*** paper selects the bearing fault datasets from Case Western Reserve University and Paderborn University to experimentally verify the effectiveness and superiority of the proposed *** generalization performance of the proposed method is tested under the variable load condition and different signal-to-noise ratios(SNRs).The experimental results show that the average accuracy of the proposed method under different working conditions is 99.2%without adding *** accuracy under different working conditions from 0 to 1 HP is 100%.When the SNR is 0 dB,the average accuracy of the proposed method can still reach 98.7%under varying working ***,the bearing fault diagnosis method proposed in this paper is characterized by high accuracy,strong anti-noise ability,and ***,the proposed method can also overcome the inﬂuence of variable working conditions on diagnosis accuracy,providing method support for the accurate diagnosis of bearing faults under strong noise and variable working conditions.

关键词： Bearings Markov transitionﬁeld SE-IShufﬂenetV2

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变压器温度显示仪检测设备的设计

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电气开关 2017年第3期55卷 59-60,64页

作者：黄远飞徐开仁广西电网有限责任公司南宁供电局广西南宁530031

设计一种变压器温度显示仪检测设备,主要通过数控精密电阻源实现,选择使用继电器网络切换精密电阻结构电路,提出继电器触点及精密电阻初始误差解决方法,实现变压器温度显示仪温度信号的智能输入,能广泛应用于变压器温度显示仪现场调校... 详细信息

设计一种变压器温度显示仪检测设备,主要通过数控精密电阻源实现,选择使用继电器网络切换精密电阻结构电路,提出继电器触点及精密电阻初始误差解决方法,实现变压器温度显示仪温度信号的智能输入,能广泛应用于变压器温度显示仪现场调校及故障检测。

关键词：精密电阻温度故障检测

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Iron-handling solute carrier SLC22A17 as a blood-brain barrier target after stroke

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Neural Regeneration Research 2025年第11期20卷 3207-3208页

作者： xueqi ren Wenlu Li Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province School of Pharmaceutical SciencesZhejiang Chinese Medical UniversityHangzhouZhejiang ProvinceChina Neuroprotection Research Laboratories Departments of Radiology and NeurologyMassachusetts General HospitalHarvard Medical SchoolBostonMAUSA

The pathophysiology of ischemic stroke is complex and multifactorial,involving various forms of cell death such as apoptosis,autophagy,and necrosis.A recent study suggests that oxidative and inflammatory stress can induce ferroptosis,a specialized form of cell death characterized by the accumulation of lipid peroxides dependent on intracellular iron overload(Li and Jia,2023).

关键词： death specialized barrier

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Optimizing the key parameter to accelerate the recovery of AMOC under a rapid increase of greenhouse gas forcing

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Atmospheric and Oceanic Science Letters 2025年第1期18卷 39-45页

作者： Haolan ren Fei Zheng Tingwei Cao Qiang Wang International Center for Climate and Environment Science(ICCES) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina University of Chinese Academy of Sciences BeijingChina College of Oceanography Hohai UniversityNanjingChina CAS Key Laboratory of Ocean Circulation and Waves Institute of OceanologyChinese Academy of Sciences and Pilot National Laboratory for Marine Science and Technology(Qingdao)QingdaoChina

Atlantic Meridional Overturning Circulation(AMOC)plays a central role in long-term climate variations through its heat and freshwater transports,which can collapse under a rapid increase of greenhouse gas forcing in climate *** studies have suggested that the deviation of model parameters is one of the major factors in inducing inaccurate AMOC *** this work,with a low-resolution earth system model,the authors try to explore whether a reasonable adjustment of the key model parameter can help to re-establish the AMOC after its *** a new optimization strategy,the extra freshwater flux(FWF)parameter is determined to be the dominant one affecting the AMOC’s *** traditional ensemble optimal interpolation(EnOI)data assimilation and new machine learning methods are adopted to optimize the FWF parameter in an abrupt 4×CO_(2) forcing experiment to improve the adaptability of model parameters and accelerate the recovery of *** results show that,under an abrupt 4×CO_(2) forcing in millennial simulations,the AMOC will first collapse and then re-establish by the default FWF parameter ***,during the parameter adjustment process,the saltier and colder sea water over the North Atlantic region are the dominant factors in usefully improving the adaptability of the FWF parameter and accelerating the recovery of AMOC,according to their physical relationship with FWF on the interdecadal timescale.

关键词： Recovery of AMOC 4×CO_(2)forcing Key parameter Parameter estimation Data assimilation Machine learning

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