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Journal of Magnesium and Alloys 2024年第2期12卷 530-545页

作者： Jiaxin zhang Xin Ding Ruirun Chen Wenchao Cao Jinshan zhang Rui Zhao National Key Laboratory for Precision Hot Processing of Metals Harbin Institute of TechnologyNo.92West Dazhi StreetHarbinHeilongjiang 150001China College of Materials Science and Engineering Taiyuan University of TechnologyNo.79West Yingze StreetTaiyuanShanxi 030024China

For the sake of improving the mechanical properties and corrosion resistance of biodegradable Mg alloy synergistically,various content of element V(0,0.05,0.10,0.15,0.20 wt.%)are introduced into an Mg-Zn-Y alloy with long-period stacking ordered(LPSO)structure,and the effects of V on its microstructure,mechanical properties and corrosion resistance are investigated *** results indicate that the grains are effectively refined by V addition,and the primaryα-Mg in Mg-Zn-Y-V0.1 alloy is most significantly refined,with grain size being decreased by 62%.The amount of 18R LPSO structure is increased owing to the V *** growth mode of the second phase(W-phase and 18R LPSO structure)is transformed to divorced growth pattern,which ascribes to the thermodynamic drive force of V to promote the nucleation of LPSO ***,18R LPSO structure presents a continuous *** to grains refinement and modification of second phase,the tensile strength and strain of alloys are both enhanced ***,the ultimate tensile strength and the elongation of V0.1 alloy are 254 MPa and 15.26%,which are 41%and 61%higher than those of V-free alloy,*** to the continuously distributed 18R LPSO structure with refined grains and stable product film,the weight loss and hydrogen evolution corrosion rates of V0.1 alloy are 7.1 and 6.2 mmy^(-1),respectively,which are 42.6%and 45.4%lower than those of V-free alloy.

关键词： Corrosion Mechanical property V-microalloying LPSO SKPFM

Optical secret sharing by multi-step liquid crystal planar doublet panning and coupling

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Chinese Optics Letters 2024年第8期22卷 21-28页

作者： Zhichang Mo Yi Chen Xiangyu Zhu Zhouhao zhang Dawei li Jianda Shao Yuanan Zhao Jianguo Wang Laboratory of Thin Film Optics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Key Laboratory of Materials for High Power Laser Chinese Academy of SciencesShanghai 201800China Henan Key Laboratory of Infrared Materials&Spectrum Measures and Applications School of PhysicsHenan Normal UniversityXinxiang 453007China Hangzhou Institute for Advanced Study University of Chinese Academy of SciencesHangzhou 310024China

The hologram, which is formed by phases coupled through cascade devices for secret information sharing, still carries a cracking risk. We propose a liquid crystal planar doublet as the information carrier, and new holograms generated by the new coupled phases when the relative displacements of the different liquid crystal layers change. The designed geometrical phases are generated by an optimized iterative restoration algorithm, and each holographic image formed by these phases is readable. This scheme achieves an increase in the capacity of the stored secret information and provides more misdirection, which is expected to have potential value in optical steganography and storage.

关键词： liquid crystal holography optical steganography displacement coupled geometrical phase

Regulating the conductance of tungsten diselenide by oxygen plasma and improving its electrical stability by encapsulation

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Nano Research 2024年第4期17卷 3253-3260页

作者： Zhaofang Cheng Shaodan He Shimin zhang Shijun Duan Min Wang Ziyu liu Rong zhang Wenya Qiang Xudong zhang Minggang Xia MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter School of PhysicsXi’an Jiaotong UniversityXi’an 710049China Department of Applied Physics School of PhysicsXi’an Jiaotong UniversityXi’an 710049China Shaanxi Province Key Laboratory of Quantum Information and Optoelectronic Quantum Devices School of PhysicsXi’an Jiaotong UniversityXi’an 710049China

Two-dimensional(2D)tungsten selenide(WSe_(2))is promising candidate material for future electronic applications,owing to its potential for ultimate device *** improving the electronic performance of WSe_(2)-based field-effect transistors(FETs),the modification of surface properties is *** this study,the seamless structural phase transition in WSe_(2) lattice is achieved by soft oxygen plasma,regulating the electrical conductance of WSe_(2)-based *** found that during the soft oxygen plasma treatment with optimal processing time,the generated oxygen ions can substitute some selenium atoms and thus locally modify the bond length,inducing 2H→1T phase transition in WSe_(2) with seamless *** mosaic structures have been proven to tailor the electronic structure and increase the hole carrier concentration inside WSe_(2),significantly increasing the channel conductance of WSe_(2) *** the further increase of the oxygen plasma treatment time,the creation of more selenium vacancy defects leads to the electronic doping,resulting in the reduction of *** from the hexagonal boron nitride(h-BN)encapsulation to interrupt the partial structural relaxation from 1T to 2H phase,our WSe_(2) FET exhibits high electronic stability with conductance of 6.8×10^(-4) S,which is about four orders of magnitude higher than 2H WSe_(2)(5.8×10^(-8) S).This study could further broaden the WSe_(2) FETs in applications for functionalization and integration in electronics.

关键词： tungsten selenide(WSe2) structural phase transition oxygen plasma conductance hexagonal boron nitride(h-BN)encapsulation

Heat dissipation of carbon shell in ZrC-SiC/TaC coating to improve protective ability against ultrahigh temperature ablation

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Journal of Advanced Ceramics 2024年第7期13卷 1080-1091页

作者： Yuyu zhang Xuemeng zhang Hongkang Ou Bozhe Wang Jia Sun Qiangang Fu Science and Technology on Thermostructural Composite Materials Laboratory Shaanxi Key Laboratory of Fiber Reinforced Light-Weight CompositesNorthwestern Polytechnical UniversityXi’an 710072China System Design Institute of Hubei Aerospace Technology Academy Wuhan 430040China

To efficiently decrease ablation heat accumulation and improve the ability of ZrC-SiC/TaC coatings to protect carbon/carbon(C/C)composites,a thermally conductive nanonetwork with a ceramic@carbon core-shell structure was designed and ***-derived SiC/TaC with a graphene carbon shell was synthesized and introduced into a ZrC coating by supersonic atmospheric plasma spraying(SAPS).Graphene shell paths increased the heat transfer capability by lowering the surface temperature to approximately 200℃during oxyacetylene *** heat dissipation of the graphene shell in the ZrC-SiC/TaC@C coating reduced the volatilization of low-melting-point phases and delayed the sintering of ZrO_(2) ***,the graphene shell in ZrC-SiC/TaC@C coating decreased the mass and linear ablation rates by 91.4%and 93.7%compared to ZrC-SiC/TaC coating,*** work provided a constructive idea for improving the ablation resistance of the coatings by incorporating carbon nanomaterials as a function of heat dissipation.

关键词： carbon/carbon(C/C)composites carbon nanomaterials core-shell structure polymer-derived ceramic(PDC) ablation resistance

Exercise-with-melatonin therapy improves sleep disorder and motor dysfunction in a rat model of ischemic stroke

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Neural Regeneration Research 2024年第6期19卷 1336-1343页

作者： Haitao Zhao Tong zhang Haojie zhang Yunlei Wang lingna Cheng School of Rehabilitation Medicine Capital Medical UniversityBeijingChina Department of Neurological Rehabilitation Beijing Bo’ai HospitalChina Rehabilitation Research CenterBeijingChina School of Rehabilitation Medicine University of Health and Rehabilitation SciencesQingdaoShandong ProvinceChina Laboratory of Brain Injury Repair and Rehabilitation China Rehabilitation Science InstituteBeijingChina

Exercise-with-melatonin therapy has complementary and synergistic effects on spinal cord injury and Alzheimer's disease,but its effect on stroke is still poorly *** this study,we established a rat model of ischemic stroke by occluding the middle cerebral artery for 60 *** treated the rats with exercise and melatonin therapy for 7 consecutive *** showed that exercise-with-melatonin therapy significantly prolonged sleep duration in the model rats,increased delta power values,and regularized delta power ***,exercise-with-melatonin therapy improved coordination,endurance,and grip strength,as well as learning and memory *** the same time,it led to higher hippocampal CA1 neuron activity and postsynaptic density thickness and lower expression of glutamate receptor 2 than did exercise or melatonin therapy *** findings suggest that exercise-withmelatonin therapy can alleviate sleep disorder and motor dysfunction by increasing glutamate receptor 2 protein expression and regulating hippocampal CA1 synaptic plasticity.

关键词： exercise glutamate receptor 2 hippocampus ischemic stroke learning melatonin memory sleep disorder synaptic plasticity

湖北农村居民消费潜力激发的关键制约因素与提升策略研究

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湖北社会科学 2024年第5期 75-83页

作者：张辉熊鹏湖北工程学院经济与管理学院湖北孝感432000 湖北小微企业发展研究中心湖北孝感432000

在当前经济形势下,提振消费信心对于保就业、促增长意义重大,而激发农村地区居民的消费潜力又是其中最关键和最薄弱的一环。对统计年鉴的面板数据、“四市七地”的问卷调研和多地基层深度访谈等数据的综合研究分析表明:近年来湖北农村... 详细信息

在当前经济形势下,提振消费信心对于保就业、促增长意义重大,而激发农村地区居民的消费潜力又是其中最关键和最薄弱的一环。对统计年鉴的面板数据、“四市七地”的问卷调研和多地基层深度访谈等数据的综合研究分析表明:近年来湖北农村居民消费水平、消费结构和消费观念都得到持续改进,但居民收入偏低、社保水平不足、人口老龄化、消费环境较差和消费期望未被满足是制约消费潜力释放的几大关键因素,而通过区域优势产业升级带动农民增收、利用互联网等新业态支持农产品创新、加快推动农村市场物流信息流通等举措能够进一步激发湖北农村居民的消费潜力。

关键词：农村居民消费消费结构消费水平消费观念

Rapid report of source parameters of 2023 M6.2 Jishishan,Gansu earthquake sequence

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Earth and Planetary Physics 2024年第2期8卷 436-443页

作者： ZhiGao Yang Jie liu YingYing zhang Wen Yang XueMei zhang China Earthquake Networks Center Beijing 100045China

The M6.2 earthquake in Jishishan,Gansu Province,on December 18,2023,caused extraordinary earthquake *** was located in the northern part of the north−south seismic zone,which is a key area for earthquake monitoring in *** newly built dense strong motion stations in this area provide unprecedented conditions for high-precision earthquake relocation,especially the earthquake focal *** paper uses the newly built strong motion and traditional broadband seismic networks to relocate the source locations of the M3.0 and above aftershocks and to invert their focal *** horizontal error of earthquake location is estimated to be 0.5−1 km,and the vertical error is 1−2 *** focal depth range of aftershocks is 9.6−14.6 km,distributed in a 12-km-long strip with SSE *** in the south are more concentrated horizontally and vertically,while aftershocks in the north are more *** focal mechanisms of the main shock and aftershocks are relatively consistent,and the P-axis orientation is consistent with the regional strain *** is a seismic blank area of M3.0 and above,about 3−5 km between the main shock and *** is suggested that the energy released by the main shock rupture is concentrated in this *** on the earthquake location and focal mechanism of the main shock,it is inferred that the Northern Lajishan fault zone is the seismogenic structure of the main shock,and the main shock did not occur on the main fault,but on a secondary *** initial rupture depth and centroid depth of the main shock were 12.8 and 14.0 km,*** source rupture depth may not be the main reason for the severe earthquake disaster.

关键词： Jishishan earthquake earthquake relocation focal mechanism strong motion data

单晶4H-SiC的摩擦诱导化学机械复合加工(FCMM)实验研究

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机械工程学报 2024年第7期60卷 401-410页

作者：张博楠黄辉武民华侨大学脆性材料产品智能制造技术国家地方联合工程研究中心厦门361021 华侨大学制造工程研究院厦门361021

单晶碳化硅(SiC)凭借其优异的材料性能成为下一代电力电子器件和光电子器件的优选衬底材料,但碳化硅的高硬脆性,强化学惰性对其高效精密加工带来了巨大挑战。提出一种基于摩擦诱导化学作用与低硬度磨粒机械作用复合的SiC晶片加工新思路... 详细信息

单晶碳化硅(SiC)凭借其优异的材料性能成为下一代电力电子器件和光电子器件的优选衬底材料,但碳化硅的高硬脆性,强化学惰性对其高效精密加工带来了巨大挑战。提出一种基于摩擦诱导化学作用与低硬度磨粒机械作用复合的SiC晶片加工新思路。跟踪了4H-SiC在不同铁基烧结盘以及不同加工工艺参数下材料去除率随时间的变化;检测了加工后晶片的表面质量及亚表面损伤。实验结果表明摩擦诱导化学机械复合加工方法通过摩擦诱导实现金属与碳化硅的固相化学反应,并利用低硬度磨粒机械去除固相化学反应产物。加工后的亚表面中并未在纳米尺度下观察到晶体变形和晶格缺陷。加工初始阶段的材料去除率最高可达1025nm/min,稳定阶段的材料去除率最高可达385nm/min。工艺参数对加工过程中的固相化学反应速率有着重要的影响,低硬度磨粒实现对化学反应粘附物的机械去除,可以有效提高材料去除率。实验结果证实了本文提出的新型加工思路的可行性,其总体加工效率明显高于现有加工方法,为实现单晶SiC晶片的高效精密加工提供了新的研究思路。

关键词：摩擦诱导固相化学反应化学机械复合加工碳化硅亚表面损伤

High recorded color rendering performance of single-structured Ce,Mn:Y_(3)(Al,Sc)_(2)Al_(3)O_(12)phosphor ceramics for high-power white LEDs/LDs

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Journal of Advanced Ceramics 2024年第6期13卷 810-820页

作者： Xuanchu liu Congcong Yang Yanbin li Chang Min Jian Kang Tianyuan Zhou Chunming Zhou Chaofan Shi Cen Shao Bingheng Sun Wieslaw Strek Hao Chen Le zhang Jiangsu Key Laboratory of Advanced Laser Materials and Devices School of Physics and Electronics EngineeringJiangsu Normal UniversityXuzhou 221116China Jiangsu Xiyi Advanced Materials Research Institute of Industrial Technology Xuzhou 221400China Xuzhou EAGLED Technology Co. Ltd.Xuzhou 221116China Xuzhou Kangna Advanced Materials Technology Co. Ltd.Xuzhou 221116China Shanghai Institute of Optics Fine Mechanics Chinese Academy of SciencesShanghai 201800China Institute of Low Temperature and Structure Research Polish Academy of SciencesWroclaw 50-422Poland State Key Laboratory of Crystal Materials Shandong UniversityJinan 250100China

Achieving a high color rendering index(CRI)and luminous stability in single-structured Ce:Y_(3)Al_(5)O_(12)(Ce:YAG)phosphor ceramics(PCs)is crucial for high-power white light-emitting diodes or laser diodes(LEDs/LDs).However,cyan valleys and insufficient amounts of the red component in the Ce:YAG emission spectra significantly limit their real *** this work,a series of Ce,Mn:Y_(3)(Al,Sc)_(2)Al_(3)O_(12)(Ce,Mn:YSAG)PCs were fabricated by vacuum sintering,and efficient spectral regulation was realized for full-color *** cyan valley was filled by the blueshifted emission peak of Ce^(3+)via Sc^(3+)*** orange‒red emission at approximately 580 nm was effectively supplemented via Mn^(2+)*** particular,CRI of Ce,Mn:YSAG increased from 56.4 to 85.8,a 52%increase compared with that of Ce:YAG under high-power LED excitation,and the operating temperature was stable at approximately 50℃for long working ***,CRI of 80.9 could still be obtained for PC-based white *** results indicated that Ce,Mn:YSAG PC,which has excellent CRI and luminous stability,is an extremely promising color convertor for high-power white LEDs/LDs.

关键词： color rendering index(CRI) color converter Ce:Y_(3)Al_(5)O_(12)(Ce:YAG)phosphor ceramics(PCs) high-power white light-emitting diodes or laser diodes(LEDs/LDs) luminous stability

Effects of different doses of glucose and fructose on central metabolic pathways and intercellular wireless communication networks in humans

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Food Science and Human Wellness 2024年第4期13卷 1906-1916页

作者： Dingqiang Lu Yujiao liu Miao Zhao Shuai Yuan Danyang liu Xinqian Wang Yixuan liu Yifei zhang Ming li Yufeng Lü Guangchang Pang Ruijuan Ren College of Biotechnology&Food Science Tianjin University of CommerceTianjin Key Laboratory of Food BiotechnologyTianjin 300314China Tianjin Institute for Food Safety Inspection Technology Tianjin 300134China

Fructose and glucose are often widely used in food processing and may contribute to many metabolic *** observe the effects of different doses of glucose and fructose on human metabolism and cellular communication,volunteers were given low,medium,and high doses of glucose and *** cytokines,glucose,lactate,nicotinamide adenine dinucleotide(NADH)and metabolic enzymes were assayed,and central carbon metabolic pathway networks and cytokine communication networks were *** results showed that the glucose and fructose groups basically maintained the trend of decreasing catabolism and increasing anabolism with increasing *** with glucose,low-dose fructose decreased catabolism and increased anabolism,significantly enhanced the expression of the inflammatory cytokine interferon-γ(IFN-γ),macrophage-derived chemokine(MDC),induced protein-10(IP-10),and eotaxin,and significantly reduced the activity of isocitrate dehydrogenase(ICDH)and pyruvate dehydrogenase complexes(PDHC).Both medium and high doses of fructose increase catabolism and anabolism,and there are more cytokines and enzymes with significant ***,multiple cytokines and enzymes show strong relevance to metabolic regulation by altering the transcription and expression of enzymes in central carbon metabolic ***,excessive intake of fructose should be reduced to avoid excessive inflammatory responses,allergic reactions and autoimmune diseases.

关键词： Fructose Glucose Central carbon metabolic pathway Metabolic enzymes Cytokine network