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Bulk nanocrystalline W-Ti alloys with exceptional mechanical properties and thermal stability

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Journal of Materials Science & Technology 2022年第19期114卷 16-28页

作者： H.x.xue x.C.Cai B.R.Sun x.shen C.C.Du x.J.Wang T.T.Yang S.W.xin T.D.shen Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and TechnologyYanshan UniversityQinhuangdao 066004China CSSC 723rd Research Institute China State Shipbuilding Corporation LimitedYangzhou 225000China

Nanocrystalline(NC)W metals and alloys often exhibit higher radiation tolerance and strength than their coarse-grained ***,their thermal stability is low,making it difficult to achieve bulk NC W metals and alloys by consolidation using conventional techniques such as pressure-less sintering,hot-explosive-compaction sintering,and spark plasma *** we report the synthesis and mechanical properties of bulk NC W_(100-x)Ti_(x)(x=10 at.%-30 at.%)alloys prepared by consolidating mechanically alloyed NC powders under a high-temperature/high-pressure *** 20 at.%-30 at.%Ti largely improves the sinterability of NC W-Ti alloy *** room-temperature microhardness and compressive yield strength of consolidated bulk NC W_(80)Ti_(20) alloy are∼16.9 and 6.0 GPa,respectively,which are mainly caused by grain boundary strengthening and significantly higher than those of previously reported W and W *** ultimate compressive strength of bulk NC W_(80)Ti_(20) measured between 900 and 1100°C deceases with increasing *** behavior can be explained by the activation of Rachinger grain boundary *** grain growth is observed in bulk NC W_(80)Ti_(20) after compression at 1000°*** calculation suggests that it is the segregation of Ti at grain boundaries that decreases the specific grain boundary free energy and makes the NC W_(80)Ti_(20) alloy thermodynamically stable.

关键词： Nanocrystalline W-Ti alloys Segregation Grain boundary energy Strength Hardness

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The effects of SnO2 on the magnetic properties of gel- derived Mn-Zn ferrites

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The effects of SnO2 on the magnetic properties of gel- deriv...

Oxygen abundance in young open clusters

International Symposium of Young Scholars on Mechanics and Material Engineering for Science and Experiments

作者： x.shen x.xu R＆D Center Changsha Research Institute of Mining and MetallurgyChangshaChina R＆D Center Changsha Research Institute of Mining and MetallurgyChangshaChina

ISBN: (纸本)1880132796

＜正＞ The aqueous ethylenediaminetetraacetic acid （EDTA） gel process has been used to produce the ferrite Mn0.57Zn0.35Fe2.08O4 The subsequent gel decomposition process was studied by thermo-gravimetric analysis and differential scanning calorimetry. The effects of SnO2 on magnetic properties of the gel-derived ferrite was investigated and better performance of the materials could be anticipated.

关键词： Gel process thermal decomposition ferrite SnO2

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Oxygen abundance in young open clusters

Primary discussion on general rules of biological invasions by comparing the characteristics of invasive plants in China and the USA

中国天文学会恒星分会2004年学术年会

作者： Z.-x.shen x.-W.Liu H.-W.ZhangD.N.C Lin

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Primary discussion on general rules of biological invasions ...

利用320层CT扫描设备进行全脑CT灌注成像和CT血管成像对MCI和AD病人的诊断价值

全国生物多样性保护及外来有害物种防治交流研讨会

作者： Lei Gao~*,Wen Y.Liu,You x.shen,Wen J.Liu (xishuangbanna Tropical Botanical Garden,CAS,xuefu road 88 of Kunming,Yunnan,P.R.China)

As global changes,biological invasions should be investigated on an intercontinental or global scale.A comparative analysis of invasive plants in China and the USA,the climates of which are similar,revealed many commonalities and differences in their taxonomic characteristics,morphological characteristics,areas of origin, invaded regions,and histories of ***,there were more species from the Asteraceae and Poaceae than from other families,and the rests did not gather in some families among the invasive biotas in the invaded *** one invasive species per family also can become a successful *** invaders had at least one reproductive mode,with sexual reproduction the main mode,and many special flower,fruit,and seed characteristics adapted these species for seed production and *** invasive plants were able to reproduce clonally and these usually had a strong invasive *** of their areas of origin indicated that invasive species mainly derived from other continents with climates similar to that of the invaded area or at latitudes within the same *** deriving from tropical areas became invaders more easily than those from other climatic zones *** the invaded areas,most invasive species inhabited environments disturbed by human activities in preference to other *** study of the invasive histories of species introduced into China and the USA demonstrates that it takes about 100 years for an exotic species to become an invasive *** histories of invasive species cannot be separated from the introductive activities of humans,because both intentional and accidental introductions by humans result in biological *** shortsighted introduction driven by current interests is extremely dangerous.

关键词： invasive plant invisibility history introduction biological invasion

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国际医学放射学杂志 2018年第1期 115-115页

作者： B.Zhang G.J.Gu H.Jiang Y.Guo x.shen B.Li 张坤 Department of Medical Imaging Renji HospitalMedical School of Jiaotong University

摘要目的评价全脑CT灌注扫描(CTP)和CT血管成像(CTA)在轻度认知障碍(MCI)和阿尔茨海默病(AD)诊断中的价值。方法采集30例MCI、35例轻度AD病人、35例

关键词：血管成像 MCI CT AD

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： Glycerol electrooxidation Hydrogen evolution Ru doping Cobalt phosphide Bifunctional electrocatalysts

Mechanism by which Rab5 promotes regeneration and functional recovery of zebrafish Mauthner axons

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Neural Regeneration Research 2025年第6期20卷 1816-1824页

作者： Jiantao Cui Yueru shen Zheng Song Dinggang Fan Bing Hu Center for Advanced Interdisciplinary Science and Biomedicine of IHM Division of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiAnhui ProvinceChina

Rab5 is a GTPase protein that is involved in intracellular membrane trafficking. It functions by binding to various effector proteins and regulating cellular responses, including the formation of transport vesicles and their fusion with the cellular membrane. Rab5 has been reported to play an important role in the development of the zebrafish embryo;however, its role in axonal regeneration in the central nervous system remains unclear. In this study, we established a zebrafish Mauthner cell model of axonal injury using single-cell electroporation and two-photon axotomy techniques. We found that overexpression of Rab5 in single Mauthner cells promoted marked axonal regeneration and increased the number of intra-axonal transport vesicles. In contrast, treatment of zebrafish larvae with the Rab kinase inhibitor CID-1067700markedly inhibited axonal regeneration in Mauthner cells. We also found that Rab5 activated phosphatidylinositol 3-kinase(PI3K) during axonal repair of Mauthner cells and promoted the recovery of zebrafish locomotor function. Additionally, rapamycin, an inhibitor of the mechanistic target of rapamycin downstream of PI3K, markedly hindered axonal regeneration. These findings suggest that Rab5 promotes the axonal regeneration of injured zebrafish Mauthner cells by activating the PI3K signaling pathway.

关键词： axonal regeneration Mauthner cell nerve regeneration Rab5 zebrafish

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回肠克罗恩病影像学狭窄和内镜下狭窄的临床结果区分

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国际医学放射学杂志 2024年第1期 124-124页

作者： L.Shi Y.Wang x.shen R.Mao J.Meng S.Huang 李桂来

摘要目的克罗恩病（CD）中基于不同定义的肠管狭窄的临床不良后果（CAO）的差异很少有文献报道。研究旨在比较回肠CD的CAO，影像学狭窄（RS）和内镜下狭窄（ES），并

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Tuning the interfacial reaction environment via pH-dependent and induced ions to understand C–N bonds coupling performance in NO3- integrated CO2 reduction to carbon and nitrogen compounds over dual Cu-based N-doped carbon catalyst

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Journal of Energy Chemistry 2025年第1期100卷 273-285页

作者： Tianhang Zhou Chen shen Zhenghao Wu xingying Lan Yi xiao College of Carbon Neutrality Future Technology State Key Laboratory of Heavy Oil Processing China University of Petroleum (Beijing) Institute of Materials Science TU Darmstadt Department of Chemistry Xi'an Jiaotong-Liverpool University Department of Mechanical and Mechatronics Engineering and Waterloo Institute of Nanotechnology University of Waterloo Waterloo

Dual atomic catalysts （DAC）,particularly copper （Cu2）-based nitrogen （N） doped graphene,show great potential to effectively convert CO2and nitrate （NO3-） into important industrial chemicals such as ethylene,glycol,acetamide,and urea through an efficient catalytical process that involves C–C and C–N ***,the origin of the coupling activity remained unclear,which substantially hinders the rational design of Cu-based catalysts for the N-integrated CO2reduction reaction （CO2RR）.To address this challenge,this work performed advanced density functional theory calculations incorporating explicit solvation based on a Cu2-based N-doped carbon (Cu2N6C10) catalyst for *** calculations are aimed to gain insight into the reaction mechanisms for the synthesis of ethylene,acetamide,and urea via coupling in the interfacial reaction *** to the sluggishness of CO2,the formation of a solvation electric layer by anions （F-,Cl-,Br-,and I-） and cations (Na+,Mg2+,K+,and Ca2+) leads to electron transfer towards the Cu *** process significantly accelerates the reduction of *** results reveal that*CO intermediates play a pivotal role in N-integrated ***,the Cu2-based N-doped carbon catalyst examined in this study has demonstrated the most potential for C–N coupling to *** findings reveal that through the process of a condensation reaction between*CO and NH2OH for urea synthesis,*NO3-is reduced to*NH3,and*CO2to*CCO at dual Cu atom *** dual-site reduction facilitates the synthesis of acetamide through a nucleophilic reaction between NH3and the ketene ***,we found that the I-and Mg2+ions,influenced by pH,were highly effective for acetamide and ammonia synthesis,except when F-and Ca2+were ***,the mechanisms of C–N bond formation were investigated via ab-initio molecular dynamics simulations,and we found that adjusting the micro-environment can change the dominant side reaction,shift

关键词： pH-dependent micro-environments C–N coupling Dual Cu-based nitrogen carbon catalysts Explicit solvation model Ion stabilizer AIMD