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Microstructure and nanoindentation hardness of shot-peened ultrafine-grained low-alloy steel

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Journal of Iron and Steel Research International 2019年第5期26卷 472-482页

作者： Xiao-wei feng Juan Xie Wen-ying Xue yong-feng shen Hong-bo Wang Zhen-yu Liu Institute of Systems Engineering of China Academy of Engineering Physics Mianyang 621999 Sichuan China Key Laboratory for Anisotropy and Texture of Materials (MOE) School of Materials Science and Engineering Northeastern University Shenyang 110819 Liaoning China The State Key Lab of Rolling and Automation Northeastern University Shenyang 110819 Liaoning China

The effect of shot peening (SP) on microstructure and hardness of ultrafine-grained (UFG) low-alloy steel was investigated. With increasing shot-peening time from 0.5 to 1.5 h, grain size of UFG low-alloy steel decreases from 400 to 280 nm at surface whilst that of the layer with a depth of 160μm decreases from (230 ± 15) to (75 ± 5) nm. Interestingly, nanoindentation shows that hardness increases linearly with increasing the SP duration, reaching a value as high as (7.10 ± 0.1) GPa at the depth of 160 μm after the SP duration of 1.5 h. The thickness of the SP treated layer is measured as^300 μm. The Hall-Petch (H-P) relationship was established for the hardening layer. Correspondingly, abrasion resistance should be ~51% higher than that of as-prepared UFG low-alloy steel. As shown in SP processing, grain refinement is the key factor responsible for the strengthening of the studied steel.

关键词： Low-alloy steel Shot peening Grain refinement Nanoindentation Hardness

基于DoA的高速场景下大规模MIMO自适应波束成形

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通信学报 2017年第6期38卷 58-67页

作者：廖勇李瑜锋沈轩帆重庆大学飞行器测控与通信教育部重点实验室重庆400044 西安电子科技大学综合业务网理论及关键技术国家重点实验室陕西西安710071

提出了高速场景下基于到达角(DoA,direction of arrival)的大规模多输入多输出(MIMO,multiple input multiple output)波束成形设计。同时,为了保证高铁在运行过程中获得最佳的系统容量,提出一种迭代的最优多波束选择方法。该方法能实... 详细信息

提出了高速场景下基于到达角(DoA,direction of arrival)的大规模多输入多输出(MIMO,multiple input multiple output)波束成形设计。同时,为了保证高铁在运行过程中获得最佳的系统容量,提出一种迭代的最优多波束选择方法。该方法能实时跟踪高铁不同的移动车厢终端(MCT,mobile carriage terminal),自适应选择不同波束所需的发射天线数和自适应调节波束总数目,且不需要信道状态信息(CSI,channel state information),从而降低系统复杂度和节省开销。数值结果表明,与传统方法相比所提方法能有效适应高速移动场景,提高系统容量。

关键词：高速铁路大规模MIMO 车地通信到达角波束成形

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Ru doping triggering reconstruction of cobalt phosphide for coupling glycerol electrooxidation with seawater electrolysis

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Journal of Energy Chemistry 2025年第1期100卷 317-326页

作者： Binglu Deng Jie shen Jinxing Lu Chuqiang Huang Zhuoyuan Chen feng Peng Yunpeng Liu School of Materials Science and Hydrogen Energy Foshan University School of Chemistry and Chemical Engineering Guangzhou University Guangdong Key Laboratory for Hydrogen Energy Technologies

Seawater electrolysis is a promising approach for sustainable energy without relying on precious ***,the large-scale seawater electrolysis is hindered by low catalytic efficiency and severe anode corrosion caused by the harmful *** contrast to the oxygen evolution reaction （OER）and chlorin ion oxidation reaction （ClOR）,glycerol oxidation reaction （GOR） is more thermodynamically and kinetically favorable ***,a Ru doping cobalt phosphide （Ru-CoP2） is proposed as a robust bifunctional electrocatalyst for seawater electrolysis and GOR,for the concurrent productions of hydrogen and value-added *** in situ and ex situ characterization analyses demonstrated that Ru doping featured in the dynamic reconstruction process from Ru-CoP2to Ru-CoOOH,accounting for the superior GOR *** coupling GOR with hydrogen evolution was realized by employing Ru-CoP2as both anode and cathode,requiring only a low voltage of 1.43 V at 100 mA cm-2,which was 250 m V lower than that in alkaline *** work guides the design of bifunctional electrocatalysts for energy-efficient seawater electrolysis coupled with biomass resource upcycling.

关键词： Anodes

Overexpression of low-density lipoprotein receptor prevents neurotoxic polarization of astrocytes via inhibiting NLRP3 inflammasome activation in experimental ischemic stroke

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Neural Regeneration Research 2025年第2期20卷 491-502页

作者： Shuai feng Juanji Li Tingting Liu Shiqi Huang Xiangliang Chen shen Liu Junshan Zhou Hongdong Zhao Ye Hong Department of Neurology Nanjing First HospitalNanjing Medical UniversityNanjingJiangsu ProvinceChina Department of Neurology Nanjing Jinling HospitalAffiliated Hospital of Medical SchoolNanjing UniversityNanjingJiangsu ProvinceChina

Neurotoxic astrocytes are a promising therapeutic target for the attenuation of cerebral ischemia/reperfusion ***-density lipoprotein receptor,a classic cholesterol regulatory receptor,has been found to inhibit NLR family pyrin domain containing protein 3(NLRP3)inflammasome activation in neurons following ischemic stroke and to suppress the activation of microglia and astrocytes in individuals with Alzheimer’s ***,little is known about the effects of low-density lipoprotein receptor on astrocytic activation in ischemic *** address this issue in the present study,we examined the mechanisms by which low-density lipoprotein receptor regulates astrocytic polarization in ischemic stroke ***,we examined low-density lipoprotein receptor expression in astrocytes via immunofluorescence staining and western blotting *** observed significant downregulation of low-density lipoprotein receptor following middle cerebral artery occlusion reperfusion and oxygen-glucose deprivation/***,we induced the astrocyte-specific overexpression of low-density lipoprotein receptor using astrocyte-specific adeno-associated ***-density lipoprotein receptor overexpression in astrocytes improved neurological outcomes in middle cerebral artery occlusion mice and reversed neurotoxic astrocytes to create a neuroprotective ***,we found that the overexpression of low-density lipoprotein receptor inhibited NLRP3 inflammasome activation in oxygen-glucose deprivation/reoxygenation injured astrocytes and that the addition of nigericin,an NLRP3 agonist,restored the neurotoxic astrocyte *** findings suggest that low-density lipoprotein receptor could inhibit the NLRP3-meidiated neurotoxic polarization of astrocytes and that increasing low-density lipoprotein receptor in astrocytes might represent a novel strategy for treating cerebral ischemic stroke.

关键词： inflammation ischemia/reperfusion injury ischemic stroke low-density lipoprotein receptor neuroprotective astrocytes neurotoxic astrocytes NLRP3 inflammasome polarization

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Comparison of the performances of copeptin and multiple biomarkers in long-term Prognosis of severe traumatic brain injury

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Comparison of the performances of copeptin and multiple biom...

Plasma copeptin level predicts acute traumatic coagulopathy and progressive hemorrhagic injury after traumatic brain injury

第四届长三角地区创伤学术大会暨2014年浙江省创伤学术年会

作者： Xiao-Qiao Dong Wen-Hua Yu Zu-yong Zhang Quan Du Ding-Bo Yang yong-feng shen Hao Wang Qiang Zhu Zhi-Hao Che Qun-Jie Liu Li Jiang Yuan-feng Du Department of Neurosurgery The Hangzhou First People's Hospital Nanjing Medical University Affiliated Hangzhou Hospital

Background:Enhanced blood levels of copeptin correlate with poor clinical outcomes after acute critical *** study aimed to compare the prognostic performances of plasma concentrations of copeptin and other biomarkers like myelin basic protein,glial fibrillary astrocyte protein,S100 B,neuron-specific enolase,phosphorylated axonal neurofilament subunit H,Tau and ubiquitin carboxyl-terminal hydrolase L1 in severe traumatic brain ***:We recruited 102 healthy controls and 102 acute *** concentrations of these biomarkers were determined using enzyme-linked immunosorbent *** prognostic predictive performances of 6-month mortality and unfavorable outcome(Glasgow Outcome Scale score of 1-3) were ***:Plasma concentrations of these biomarkers were statistically significantly higher in all patients than in healthy controls,in non-survivors than in survivors and in patients with unfavorable outcome than with favorable *** under receiver operating characteristic curves of plasma concentrations of these biomarkers were similar to those of Glasgow Coma Scale score for prognostic *** plasma copeptin concentration,other biomarkers concentrations in plasma did not statistically significantly improve prognostic predictive value of Glasgow Coma Scale ***:Copeptin levels may be a useful tool to predict long-term clinical outcomes after severe traumatic brain injury and have a potential to assist clinicians.

关键词： Traumatic brain injury Prognosis Copeptin Biomarkers

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Plasma copeptin level predicts acute traumatic coagulopathy ...

Comparison of the performances of copeptin and multiple biomarkers in long-term prognosis of severe traumatic brain injury

第四届长三角地区创伤学术大会暨2014年浙江省创伤学术年会

作者： Wen-Hua Yu Ding-Bo Yang Xiao-Qiao Dong Quan Du yong-feng shen Zu-yong Zhang Qiang Zhu Zhi-Hao Che Qun-Jie Liu Hao Wang Li Jiang Yuan-feng Du Department of Neurosurgery The Hangzhou First People's Hospital Nanjing Medical University Affiliated Hangzhou Hospital

Higher plasma copeptin levels correlate with poor clinical outcomes after traumatic brain ***,their links with acute traumatic coagulopathy and progressive hemorrhagic injury are ***,we aimed to investigate the relationship between plasma copeptin levels,acute traumatic coagulopathy and progressive hemorrhagic injury in patients with severe traumatic brain *** prospectively studied 100 consecutive patients presenting within 6 hours from head *** hemorrhagic injury was present when the follow-up computerized tomography scan reported any increase in size or number of the hemorrhagic lesion,including newly developed *** traumatic coagulopathy was defined as an activated partial thromboplastic time greater than 40 seconds and / or international normalized ratio greater than 1.2 and / or a platelet count less than 120×10/*** measured plasma copeptin levels on admission using an enzyme-linked immunosorbent assay in a blinded *** multivariate logistic regression analysis,plasma copeptin level emerged as an independent predictor of progressive hemorrhagic injury and acute traumatic *** receiver operating characteristic curves,we calculated areas under the curve for progressive hemorrhagic injury and acute traumatic *** predictive performance of copeptin was similar to that of Glasgow Coma Scale ***,copeptin did not obviously improve the predictive value of Glasgow Coma Scale ***,copeptin may help in the prediction of progressive hemorrhagic injury and acute traumatic coagulopathy after traumatic brain injury.

关键词： Copeptin Traumatic brain injury Acute traumatic coagulopathy Progressive hemorrhagic injury Biomarker

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Comparison of the performances of copeptin and multiple biom...

Merging bound states in the continuum in an open acoustic resonator

2014浙江省神经外科学学术年会

作者：董晓巧 Wen-Hua Yu Zu-yong Zhang Quan Du Ding-Bo Yang yong-feng shen Hao Wang Qiang Zhu Zhi-Hao Che Qun-Jie Liu Li Jiang Yuan-feng Du Department of Neurosurgery The Hangzhou First People' s Hospital Nanjing Medical University Affiliated Hangzhou Hospital

Background:Enhanced blood levels of copeptin correlate with poor clinical outcomes after acute critical *** study aimed to compare the prognostic performances of plasma concentrations of copeptin and other biomarkers like myelin basic protein,glial fibrillary astrocyte protein,S100B,neuron-specific enolase,phosphorylated axonal neurofilament subunit H,Tau and ubiquitin carboxyl-terminal hydrolase L1 in severe traumatic brain ***:We recruited 102 healthy controls and 102 acute *** concentrations of these biomarkers were determined using enzymelinked immunosorbent *** prognostic predictive performances of 6-month mortality and unfavorable outcome(Glasgow Outcome Scale score of 1-3)were ***:Plasma concentrations of these biomarkers were statistically significantly higher in all patients than in healthy controls,in non-survivors than in survivors and inpatients with unfavorable outcome than with favorable *** under receiver operating characteristic curves of plasma concentrations of these biomarkers were similar to those of Glasgow Coma Scale score for prognostic *** plasma copeptin concentration,other biomarkers concentrations in plasma did not statistically significantly improve prognostic predictive value of Glasgow Coma Scale ***:Copeptin levels may be a useful tool to predict long-term clinical outcomes after severe traumatic brain injury and have a potential to assist clinicians.

关键词： Traumatic brain injury Prognosis Copeptin Biomarkers

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 124-131页

作者： Lujun Huang Bin Jia Artem S.Pilipchuk Sibo Huang Chen shen Almas F.Sadreev yong Li Andrey E.Miroshnichenko School of Physics and Electronic Sciences East China Normal University Institute of Acoustics Tongji University L.V.Kirensky Institute of Physics Department of Mechanical Engineering Rowan University School of Engineering and Technology University of New South Wales at Canberra

Bound states in the continuum （BICs） are perfectly localized resonances despite embedding in the continuum ***,an isolated BIC is very sensitive to the structure ***,we report merging acoustic BICs in a single open resonator,robust against the structure *** find that both symmetry-protected BIC and Friedrich-Wintgen BIC are sustained in a single coupled waveguide-resonator *** varying the height and length of the resonator,these two BICs move toward each other and merge into a single one at a critical *** to an individual BIC,the merged BIC is robust against fabrication error because its Q-factor is proportional to ΔL-4,whereΔL embodies the structure *** essence of this extraordinary phenomenon is perfectly explained by the two-and three-level approximations of the effective nonHermitian ***,we present direct experimental demonstrations of the moving and merging of BICs in a coupled 3D waveguide-resonator,which are evidenced by the vanishing of the linewidth of Fano resonance in the transmission *** results may find exciting applications in designing high-quality acoustic sources,sensors and filters.

关键词： acoustic resonances bound state in the continuum high-Q resonances

Localizing base stations with measured data:a concatenated image-based deep learning approach

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Science China(Information Sciences) 2025年

作者： Yang CHEN Ziyuan LIU feng JIANG Hong shen Wei XU Mengyu LI Ritao CHENG National Mobile Communications Research Laboratory Southeast University China Mobile Group Design Institute Co. Ltd.

Localization has become an indispensable function of modern cellular communication systems[1]. In a cloud radio access network （C-RAN）, the remote radio head （RRH） is the actual signal transmitter, whose location ...

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