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Relationship between alanine aminotransferase levels and metabolic syndrome in nonalcoholic fatty liver disease

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2008年第8期9卷 616-622页

作者： Zhou-wen chen Li-ying chen Hong-lei DAI Jian-hua chen Li-zheng FANG Department of General Practice Sir Run Run Shaw Hospital School of Medicine Zhejiang University Hangzhou 310016 China

Objective： To investigate the relationship between alanine aminotransferase （ALT） levels and metabolic syndrome （MS） in nonalcoholic fatty liver disease （NAFLD）. Methods： A total of 26527 subjects who received medical health checkup in our hospital from January 2005 to July 2007 were enrolled in the study. The diagnosis of fatty liver was based on ultrasound imaging. MS was defined according to the criteria of the Adult Treatment Panel III. ALT, triglyceride （TG）, high density lipoprotein cholesterol （HDL-c）, fasting plasma glucose （FPG）, height, weight, waist circumference （wc）, systolic blood pressure （SBP） and diastolic blood pressure （DBP） were measured in each subject to analyze the relationship between MS and ALT activity Results：（1） The prevalence of NAFLD in men （30.94%） was significantly higher than that in women （15.65%）; （2） The incidence of MS in NAFLD （33.83%） was significantly greater than that in non-NAFLD （10.62%）; （3） Of the 6470 subjects with NAFLD, in the age-adjusted partial correlation analysis, there were statistically significant correlations between the ALT levels and most metabolic risk factors in each sex （P〈0.01）, except that ALT levels multiple stepwise regression analysis, SBP lost its significance, and had no correlation with HDL-c in women. Moreover, in the wc, body mass index （BMI）, age, DBP, TG and FPG were independently associated with ALT levels in both sexes （P〈0.05）. HDL-c remained significant and was independently related to ALT levels in men; （4） ALT levels were significantly higher in subjects with MS compared to those without MS （P〈0.001）. Mean ALT levels increased with the number of MS components in each sex （P〈0.05 for trend）. Conclusion： We found a strong relationship between ALT levels and MS in NAFLD and revealed that the cluster of MS components might be the predictor for ALT elevations.

关键词： Nonalcoholic fatty liver disease (NAFLD) Alanine aminotransferase (ALT) Metabolic syndrome (MS)

原位表面改性的纳米wc/AlSi10Mg合金增强机制

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Transactions of Nonferrous Metals Society of China 2024年第1期34卷 50-64页

作者：易江龙廖汉林常成闫星辰刘敏周克崧广东工业大学材料与能源学院广州510006 广东省科学院新材料研究所现代材料表面工程技术国家工程实验室广东省现代表面工程技术重点实验室广州510651 ICB UMR 6303 CNRSUniv.Bourgogne Franche-ComtéUTBM90010BelfortFrance

采用静电自组装工艺合成-系列不同纳米wc含量的表面改性Al Si10Mg粉末,并使用激光选区熔化(SLM)技术制备纳米wc/AlSi10Mg复合材料。结果表明,SLM制备的纳米wc/AlSi10Mg材料中形成多种Al-W金属间化合物相,通过(002)(α(Al))//(104)Al_(5)... 详细信息

采用静电自组装工艺合成-系列不同纳米wc含量的表面改性Al Si10Mg粉末,并使用激光选区熔化(SLM)技术制备纳米wc/AlSi10Mg复合材料。结果表明,SLM制备的纳米wc/AlSi10Mg材料中形成多种Al-W金属间化合物相,通过(002)(α(Al))//(104)Al_(5)W的取向关系,证实具有4.7%的低晶格失配度的Al/Al5W可形成良好共格界面。纳米wc颗粒和Al-W相可促使柱状晶转变为等轴晶,获得精细的等轴晶组织。同时,SLM制备的3%(质量分数)纳米wc/Al Si10Mg复合材料具有最优的力学性能,抗拉强度为(464.1±8.68) MPa,伸长率为(5.6±0.95)%。此外,与其他wc/AlSi10Mg复合材料相比,SLM制备的3%wc/AlSi10Mg样品的平均摩擦因数和磨损率最低,分别为0.429和3.842×10^(-5)mm^(3)/(N·m)。力学和磨损性能的提升主要归因于晶粒细化和第二相析出强化作用。

关键词：原位改性激光选区熔化纳米wc AlSi10Mg 力学性能

A novel method of utilizing static mixer to obtain mixing homogeneity of multi-species powders in laser metal deposition

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Chinese Journal of Aeronautics 2023年第1期36卷 423-433页

作者： Jipeng chen Shouchun XIE He HUANG School of Mechanical and Electronic Engineering Nanjing Forestry UniversityNanjing 210037China Nanjing Huirui Photoelectric Technology Co. LtdNanjing 211121China

Real-time mixing of multi-species powder challenges Laser Metal Deposition(LMD)of Functionally Graded Materials(FGMs).The current work proposes a novel method of using a static mixer to realize rapid,uniform multi-species powder ***,copper powder and 316L stainless steel powder are selected to complete the powder mixing observation experiment with Scanning Electron Microscope(SEM)and Energy Dispersive Spectrometer(EDS).Secondly,computational fluid dynamics and particle mixing simulation models are used to analyze the flow field and particle motion characteristics in the static ***,LMD experiment and metallo-graphic observation are carried out with 316L stainless steel powder and wc powder to verify the feasibility of the static *** study provides a theoretical and practical basis for powder mixing in laser processing with a static *** conclusions can also be applied to other processing fields requiring real-time and uniform mixing of multi-species powders.

关键词： Homogeneity Laser metal deposition Multi-species powder Mixing Static mixer

碳化钨复合涂层的制备技术及其耐磨耐蚀性的研究进展

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腐蚀与防护 2024年第4期45卷 46-53页

作者：陈志聪黄超刘威沈利民中国矿业大学化工学院徐州221116 国家煤加工与洁净化工程技术研究中心徐州221116

碳化钨涂层具有化学稳定性高、硬度大和耐磨性好等特点,常用于金属表面涂层的制备。从碳化钨涂层的不同制备原理出发,综述了超声速火焰喷涂、等离子喷涂、等离子熔覆、激光熔覆和真空熔覆等碳化钨涂层制备技术的国内外研究进展,分析了... 详细信息

碳化钨涂层具有化学稳定性高、硬度大和耐磨性好等特点,常用于金属表面涂层的制备。从碳化钨涂层的不同制备原理出发,综述了超声速火焰喷涂、等离子喷涂、等离子熔覆、激光熔覆和真空熔覆等碳化钨涂层制备技术的国内外研究进展,分析了不同制备技术下涂层的耐磨性和耐蚀性,探讨了涂层制备技术存在的问题和未来的研究方向。

关键词：碳化钨涂层超声速火焰喷涂等离子喷涂等离子熔覆激光熔覆真空熔覆

Microstructure and mechanical properties of wc-20wt% Co/ZrO_2(3Y)cermet composites

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Journal of University of Science and Technology Beijing 2006年第2期13卷 174-177页

作者： Lin An Jingtao Han Jan chen Materials Science and Engineering School University of Science and Technology Beijing Beijing 100083 China Shougang Dongxing Industry Corporation Yantan 264006 China

The cermet composites wc-20wt%Co/ZrO2（E6）with four different comtents of ZrO2（3Y）were prepared by normal vacuum sinter processing;the optical microscope and SEMwere used to characterize their *** *** strength and impact toughness of the specimens were *** experimental results show that ZrO2（3Y） particles in wc-20wt%Co matrix are sphcrical particles in different sizes which are distributed uniformly in Co phases and wc phases,the bending strength and impact toughness of the wc-20wt%Co cermet composites added ZrO2（3Y）improve *** the hardness values have little change.

关键词： ZrO2(3Y) cermet composites mechanical properties microstructure normal vacuum sinter

Effects of Binder Phase Content and Substrate Hardness on Deposition Behavior of Cermet Particles in Cold Spraying Process

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稀有金属材料与工程 2012年第S1期41卷 384-387页

作者： Wang Hongtao Ji Gangchang chen Xiao chen Qinyu Bai Xiaobo Jiujiang Univ JiuJiang Key Lab Green Remfg Jiujiang 332005 Peoples R China

In this paper,three kinds of cermet particles with different binder phase and content,namely wc-12Co,wc-17Co and Cr3C2-25NiCr were deposited on the Q235 low carbon steel and wc-12Co coating substrates to investigate the effect of binder phase content and substrate hardness on deposition behavior of cermet particle during cold *** morphology of the deposited particles was examined by scanning electron microscopy(SEM)from the particle surface and *** was found that with increasing substrate hardness,the deposition behavior of cermet particles transformed from completely embedding into substrate to partially flattening and even *** the Co content from 12 wt%to 17 wt% influenced significantly the deposition deformation behavior of the wc-Co particles,the higher Co content brought about a fuller flattening of wc-Co ***,Cr3C2-25NiCr particle exhibited the relatively lower flattening ratio and significant rebounding of Cr3C2 even with the highest binder phase content,which may be attributed to the bigger Cr3C2 size and weak bonding between Cr3C2 and NiCr.

关键词： cold spraying ball milling aluminum matrix composites microstructure

Rare Earth Doped New Cemented Carbide with Ni-Co Binder for Mining

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Journal of Central South University 2000年第3期12卷 143-145页

作者： ZHANG Li chen Shu Powder Metallurgy Factory Central South UniversityChangsha 410083China Changsha Research Institute of Mining and Metallurgy Changsha 410012China

A method, doping wc with La(NO 3) 3, of producing cemented carbide with rare earth was introduced. The effects of lanthanum on the mechanical properties and microstructure of wc 9(Co 75%Ni) cemented carbide were studied and a rock drilling experiment was carried *** experimental results show that both transverse rupture strength (TRS) and hardness of wc 9(Co 75%Ni) rare earth cemented carbides can match that of wc 9Co cemented carbide, when La 2O 3 / (Co+Ni) ratio is 0.3%, the abnormal growth of wc grain in the cemented carbide can be restrained effectively, the homogeneity of grain size in microstructure and the wear resistance are improved, which can be matchable to that of wc 9Co cemented carbide for mining.

关键词： cemented carbide rare earth cobalt substitution application

行为改变技术分类法第一版(BCTTv1)汉化及应用

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中华行为医学与脑科学杂志 2024年第2期33卷 172-176页

作者：仲学锋陈天舒王筱婷安徽医科大学卫生管理学院合肥230032 Centre for Behaviour Change University College LondonLondon WC1E 7HB

行为改变技术分类法第一版(behavior change techniques taxonomy v1, BCTTv1)是使用最广泛的行为改变技术分类, 它提供了一系列共享的、标准化的术语来识别行为干预的有效成分。本文对BCTTv1进行翻译汉化, 形成BCTTv1汉化版。BCTTv1由9... 详细信息

行为改变技术分类法第一版(behavior change techniques taxonomy v1, BCTTv1)是使用最广泛的行为改变技术分类, 它提供了一系列共享的、标准化的术语来识别行为干预的有效成分。本文对BCTTv1进行翻译汉化, 形成BCTTv1汉化版。BCTTv1由93个行为改变技术组成, 按层次结构分为16组, 每组包含3~11个行为改变技术, 并对每项行为改变技术进行命名、定义、解释和举例。本文还简述行为改变技术在行为干预研究中的应用, 为推动行为改变干预方法和技术在中国的应用和推广提供参考依据。

关键词：行为改变技术分类法研究汉化应用

热流密度对高速钢刀具多道熔覆wc/Co陶瓷层组织与性能的影响

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表面技术 2024年第13期53卷 207-219页

作者：陈翔张德强李金华郭海华姚芳萍朴若华辽宁工业大学工程实践教学部辽宁锦州121001 辽宁工业大学机械工程与自动化学院辽宁锦州121001 大连市经济贸易学校实训中心辽宁大连116000

目的研究高速钢刀具表面激光多道熔覆wc/Co陶瓷层时,热流密度对熔覆层道次间的影响规律,以及多道熔覆层制备时的参数选择。方法建立多道单层激光熔覆理论模型,并利用模拟仿真和实验的方法,以热流密度作为评价指标,对激光热源的不同参数... 详细信息

目的研究高速钢刀具表面激光多道熔覆wc/Co陶瓷层时,热流密度对熔覆层道次间的影响规律,以及多道熔覆层制备时的参数选择。方法建立多道单层激光熔覆理论模型,并利用模拟仿真和实验的方法,以热流密度作为评价指标,对激光热源的不同参数和熔覆层组织与性能进行耦合分析。结果当热流密度小于24.06×10^(6) W/m^(2)时,熔覆层内形成细长的枝状晶。当热流密度在36.09×10^(6)~39.82×10^(6) W/m^(2)变化时,熔覆层内形成以胞状、枝状为主要强化相的多晶体混合组织。当热流密度大于44.11×10^(6) W/m^(2)时,熔覆层组织形成稳态的块状结构。不同热流密度下,熔覆层的物相组织均由Fe_(3)W_(3)C、Co_(3)W_(3)C、Mo_(3)Co_(3)C、W_(2)C、wc、Cr_(3)Mo、(Cr,Fe)_(7)C_(3)和多种间隙化合物组成。结论当第n道熔覆层制备完成后,受到后续第n+1道熔覆层制备时热流密度的影响较大,而此后道次的影响较小。熔覆层内部组织形态随着热流密度的增加从细长的枝状晶向胞状晶转变,再逐渐形成稳态块状晶。熔覆层内各位置的显微硬度值随着热流密度的增加而先增大,随后逐渐减小。较大的热流密度会导致基材参与熔覆的质量增加,但降低了基材的抗弯曲强度,加大了熔覆层及基材断裂的可能性。当热流密度为36.09×10^(6) W/m^(2)时,是一组较为理想的工艺参数选择。

关键词：激光熔覆热流密度 wc/Co陶瓷熔覆层显微组织高速钢刀具多道熔覆