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Tool wear mechanisms in axial ultrasonic vibration assisted milling in-situ TiB2/7050Al metal matrix composites

Advances in Manufacturing 2020年第2期8卷 252-264页

作者： Xiao-Fen Liu wen-Hu Wang Rui-song Jiang Yi-Feng Xiong Kun-Yang lin School of Mechanical Engineering Northwestern Polytechnical UniversityXi'an 710072People's Republic of China School of Aeronautics and Astronautics Sichuan UniversityChengdu 610065People's Republic of China

The in-situ TiB2 particle reinforced aluminum matrix composites are materials that are difficult to machine,owing to hard ceramic particles in the *** the milling process,the polycrystalline diamond(PCD)tools are used for machining these materials instead of carbide cutting tools,which significantly increase the machining *** this study,ultrasonic vibration method was applied for milling in-situ TiB2/7050A1 metal matrix composites using a TiAIN coated carbide end milling *** completely understand the tool wear mechanism in ultrasonic-vibration assisted milling(UAM),the relative motion of the cutting tool and interaction of workpiecetool-chip contact interface was analyzed in ***,a comparative experimental study with and without ultrasonic vibration was carried out to investigate the infuences of ultrasonic vibration and cutting parameters on the cutting force,tool life and tool wear *** results show that the motion of the cutting tool relative to the chip changes periodically in the helical direction and the separation of tool and chip occurs in the transverse direction in one vibration period,in ultrasonic vibration assisted cutting.I arge instantaneous acceleration can be obtained in axial ultrasonic vibration *** cutting force in axial direction is significantly reduced by 42%-57%,40%--57%and 44%-54%,at different cutting speeds,feed rates and cutting depths,respectively,compared with that in conventional ***,the tool life is prolonged approximately 2--5 times when the ultrasonic vibration method is *** tool wear pattern microcracks are only found in *** might be of great importance for future research in order to understand the cutting mechanisms in UAM of in-situ TiB2/7050A1 metal matrix composites.

关键词： Aluminum matrix composites Ultrasonic vibration Milling Cutting force Tool wear

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Self-etching Ni-Co hydroxides@Ni-Cu nanowire arrays with enhancing ultrahigh areal capacitance for flexible thin-film supercapacitors

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Rare Metals 2017年第9期36卷 691-697页

作者： Peng Guo Yang Shen Yu song Jing Ma Yuan-Hua lin Ce-wen Nan State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Laboratory of Advanced Energy Storage Materials and Devices Research Institute of Tsinghua University in ShenzhenShenzhen 518057China

Flexible thin-film supercapacitors with high specific capacitance are highly desirable for modern wearable or micro-sized electrical and electronic applications. In this contribution, Ni-Co hydroxides（NCH）nanosheets were deposited on top of Ni-Cu alloy（NCA）nanowire arrays forming a freestanding thin-film composite electrode with hierarchical structure for *** electrochemical cycling, the dissolution of Cu into Cu ions will create more active sites on NCA, and the redeposited copper oxide can be coated onto NCH, giving rise to substantial increase in specific capacitance with cycling. Meanwhile, NCA and NCH have excellent conductivity, thus leading to excellent rate performance. This flexible thin-film electrode delivers an ultrahigh initial specific capacitance of 0.63 F·cm^（-2）（or 781.3 F·cm^（-3））.During charge-discharge cycles, the specific capacitance can increase up to 1.18 F·cm^（-2）（or 1475 F·cm^（-3）） along with the“self-etching”process. The electrode presents a better specific capacitance and rate capability compared with previously reported flexible thin-film electrode, and this novel design of etching technique may expand to other binary or ternary materials.

关键词： Nickel Cobalt Copper Hydroxides Supercapacitors

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Seismic health monitoring of RC frame structures using smart aggregates

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Earthquake Engineering and Engineering Vibration 2013年第1期12卷 25-32页

作者： wen-I Liao C.H.lin J.S.Hwang G.song Department of Civil Engineering Taipei University of Techology (NTUT) Department of Construction Engineering Taiwan University of Science and Technology Department of Mechanical Engineering University of Houston

Structural health monitoring of RC structures under seismic loads has recently attracted much attention in the earthquake engineering research community. In this study, a piezoceramic-based device called ＂smart aggregate＂ was used for the health monitoring of RC frame structures under earthquake excitations. Three RC moment frames instrumented with smart aggregates were tested using a shaketable with different ground excitation intensities. Distributed piezoceramic- based smart aggregates were embedded in the RC structures and used to monitor their health condition during the tests. The sensitivity and effectiveness of the proposed piezoceramic-based approach were investigated and evaluated by analyzing the measured responses. The displacement ductility demand of the structural members was calculated and compared with the damage index determined from the health monitoring system. The comparison shows that the damage index is compatible with the calculated ductility demand.

关键词： smart aggregate health monitoring RC frame shaketable piezoceramic

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A Review on Shale Reservoirs as an Unconventional Play--The History,Technology Revolution,Importance to Oil and Gas Industry,and the Development Future

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Acta Geologica Sinica(English Edition) 2016年第5期90卷 1887-1902页

作者： lin wen McMaster University Hamilton L8S4L8 Ontario Canada

As a milestone of the entire energy industry,unconventional resources have inevitably swept the world in the last decade,and will certainly dominate the global oil and gas industry in the near ***,the ＂unconventional＂ will become ＂conventional＂.Along with the rapid development,however,some issues have emerged,which are closely related to the viability of unconventional resources *** the current circumstances of low crude oil and gas price,coupled with the prominent environmental concerns,the arguments about the development and production of unconventional resources have been recently heated *** work introduced the fullblown aspects of unconventional resources especially shale reservoirs,by discussing their concepts and definitions,reviewing the shale gas and shale oil development history and necessity,analyzing the shale plays＇ geology and petroleum systems with respects to key hydrocarbon accumulation elements and mechanisms,and summarizing the technology *** study also discussed the relevant key issues,including significant estimation uncertainty of technically recoverable resources,the equivocal understanding of complex geology preventing the production and technologies implementation optimization,the difficulties of experiences and technologies global expanding,and the corresponding risks and *** addition,based on the latest production and exploration data,the future perspective of the unconventional resources was depicted from global unconventional resources assessments,technology development,and limitations constraining the development.

关键词： unconventional resources shale gas shale oil technology uncertainties

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纳米材料工程课程实验的设计与教学实践

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实验技术与管理 2007年第11期24卷 123-124,142页

作者：林文松李曼萍童建华刘延辉上海工程技术大学材料学院上海201620

该文分析了材料专业课程传统实验教学的局限和不足，对新设课程“纳米材料工程”实验课的设置及实施进行了全新的思考，设计了具有创新性和综合性的实验单元。教学实践表明，创新性实验课程可以把课堂的理论教学与实践教学有机地结合起... 详细信息

该文分析了材料专业课程传统实验教学的局限和不足，对新设课程“纳米材料工程”实验课的设置及实施进行了全新的思考，设计了具有创新性和综合性的实验单元。教学实践表明，创新性实验课程可以把课堂的理论教学与实践教学有机地结合起来，有助于培养学生的创新意识，提高学生的综合分析和动手解决问题的能力。

关键词：实验课程原始性实验纳米材料工程

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Electrochemical adsorption and passivation on gold surface in alkaline thiourea solutions

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Rare Metals 2020年第8期39卷 951-958页

作者： wen-Juan Li He Zhou An-Ping Bai Yong-Sheng song Liu-Lu Cai Shui-lin Zheng Qi-Dong Zhang song Cao School of Chemical and Environmental Engineering China University of Mining and Technology(Beijing)Beijing 100083China GRIMAT Engineering Institute Co. Ltd.(GRIMAT)Beijing 101407China National Engineering Laboratory of Biohydrometallurgy GRINM Resources and Environment Tech.Co.LtdBeijing 101407China Beijing Vocational College of Labour and Social Security Beijing 102200China

An electrochemical method was used to examine Au surface absorption and passivation under the most commonly employed pH conditions in an alkaline Au leaching *** polarization at different pH values was obtained through the current step *** pH 10,no absorption layer was *** the pH was increased to 11,an absorption layer was formed through the Au electrode *** pH 12,the entire system could not be stabilized,even after long durations because of the thiourea oxidation and *** samples were analyzed by scanning electron microscopy(SEM),energy-dispersive X-ray spectroscopy(EDS),and atomic force microscopy(AFM).AFM observations of the Au plating surface and SEM-EDS analyses for the Au-coated graphite surface indicated that a passivation membrane was formed on the Au surface after its use in the alkaline thiourea Au leaching ***-step leaching was used to confirm the conclusions drawn from the experimental *** twostage experimental results further confirmed the existence of a passivation membrane.

关键词： Alkaline thiourea Gold Electrochemical adsorption Passivation

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Treadmill exercise in combination with acousto-optic and olfactory stimulation improves cognitive function in APP/PS1 mice through the brain-derived neurotrophic factor-and Cygb-associated signaling pathways

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Neural Regeneration Research 2025年第9期20卷 2706-2726页

作者： Biao Xiao Chaoyang Chu Zhicheng lin Tianyuan Fang Yuyu Zhou Chuxia Zhang Jianghui Shan Shiyu Chen Liping Li Department of Physiology and Pharmacology Health Science CenterNingbo UniversityNingboZhejiang ProvinceChina Ningbo Key Laboratory of Behavioral Neuroscience Health Science CenterNingbo UniversityNingboZhejiang ProvinceChina Key Laboratory of Addiction Research of Zhejiang Province NingboZhejiang ProvinceChina

A reduction in adult neurogenesis is associated with behavioral abnormalities in patients with Alzheimer's ***,enhancing adult neurogenesis represents a promising therapeutic approach for mitigating disease symptoms and ***,nonpharmacological interventions aimed at inducing adult neurogenesis are currently *** individual non-pharmacological interventions,such as aerobic exercise,acousto-optic stimulation,and olfactory stimulation,have shown limited capacity to improve neurogenesis and cognitive function in patients with Alzheimer's disease,the therapeutic effect of a strategy that combines these interventions has not been fully *** this study,we observed an age-dependent decrease in adult neurogenesis and a concurrent increase in amyloid-beta accumulation in the hippocampus of amyloid precursor protein/presenilin 1 mice aged 2-8 *** deposition became evident at 4 months,while neurogenesis declined by 6 months,further deteriorating as the disease ***,following a 4-week multifactor stimulation protocol,which encompassed treadmill running(46 min/d,10 m/min,6 days per week),40 Hz acousto-optic stimulation(1 hour/day,6 days/week),and olfactory stimulation(1 hour/day,6 days/week),we found a significant increase in the number of newborn cells(5'-bromo-2'-deoxyuridine-positive cells),immature neurons(doublecortin-positive cells),newborn immature neurons(5'-bromo-2'-deoxyuridine-positive/doublecortin-positive cells),and newborn astrocytes(5'-bromo-2'-deoxyuridine-positive/glial fibrillary acidic protein-positive cells).Additionally,the amyloid-beta load in the hippocampus *** findings suggest that multifactor stimulation can enhance adult hippocampal neurogenesis and mitigate amyloid-beta neuropathology in amyloid precursor protein/presenilin 1 ***,cognitive abilities were improved,and depressive symptoms were alleviated in amyloid precursor protein/presenilin 1 mice

关键词： acousto-optic stimulation adult neurogenesis Alzheimer's disease amyloid precursor protein/presenilin 1 mice amyloid-beta deposition brain cell apoptosis cognitive impairment depression-like behavior involuntary treadmill exercise olfactory stimulation serum metabolites

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量子核判别分析算法

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郑州大学学报（理学版） 2025年第1期57卷 61-66页

作者：康榕乘余凯张新林崧郭躬德福建师范大学计算机与网络空间安全学院福建福州350117 福建师范大学数字福建环境监测物联网实验室福建福州350117 福建师范大学数学与统计学院福建福州350117

核判别分析法通过核函数扩展了线性判别分析对非线性数据的处理能力,成为模式识别领域中一个重要的分支。然而,随着数据的指数增长,经典核判别分析算法在提取特征时会消耗大量计算资源。针对这一问题,利用量子叠加性和并行性提出了一种... 详细信息

核判别分析法通过核函数扩展了线性判别分析对非线性数据的处理能力,成为模式识别领域中一个重要的分支。然而,随着数据的指数增长,经典核判别分析算法在提取特征时会消耗大量计算资源。针对这一问题,利用量子叠加性和并行性提出了一种量子核判别分析算法。首先,借助量子随机存储器技术与控制旋转操作构造需要的类间矩阵和类内矩阵所对应的密度算子;然后,融入线性方程的求解思路并行获取特征态。理论分析表明,所提算法与经典算法相比具有指数级加速。

关键词：量子机器学习非线性判别分析核函数特征提取量子厄米特链积相位估计

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Mechanism of Residual Stress Reduction in Low Alloy Steel by a Low Frequency Alternating Magnetic Treatment

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Journal of Materials Science & Technology 2012年第9期28卷 803-808页

作者： Yanli song lin Hua School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China

Residual stress reduction in low alloy steel by a low frequency alternating magnetic treatment and its mechanism were investigated. Experimental results revealed that average stress reductions of 20%-24% were obtained in the welded samples. Moreover, compared with the zones with lower initial stress levels, more remarkable stress reductions were obtained in the stress concentration zones. The microstructures and magnetic domains were observed by scanning electron microscopy （SEM） and atomic force microscopy （AFM）. Based on the analysis of the microstructure and magnetic domain changes, the mechanism of stress reduction by the magnetic treatment has been concluded：（1） the magneto-plastic deformations mainly due to the more uniform redistribution of dislocations are the fundamental cause of stress relaxation; and （2） surface topography is also proved to affect the magnetic treatment results to some degree by influencing magnetic domains.

关键词： Magnetic treatment Residual stress reduction Magneto-plastic deformations Surface topography

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Quantum secret sharing between multiparty and multiparty with entanglement swapping

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The Journal of China Universities of Posts and Telecommunications 2008年第4期15卷 63-68页

作者： lin song GAO Fei QIN Su-juan wen Qiao-yan ZHU Fu-chen State key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China Laboratory of Network Security and Cryptology Fujian Normal University Fuzhou 350007 China National Laboratory for Modern Communications Chengdu 610041 China

A quantum secret sharing （QSS） protocol between multiparty and multiparty is proposed, based on Greenberger-Horne- Zeilinger （GHZ） state. The protocol utilizes quantum Fourier transform and entanglement swapping to achieve a high intrinsic efficiency and source capacity. Then, the security of this protocol against some possible eavesdropping strategies has been analyzed. Furthermore, the presented protocol is generalized to the d-level case.

关键词： entanglement swapping quantum Fourier transform quantum secret sharing

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