检索结果-南通市图书馆

Mechanical and corrosion properties of low-carbon steel prepared by friction stir processing

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2019年第2期26卷 202-209页

作者： li-ying huang Kuai-she Wang Wen Wang Kai Zhao Jie Yuan Ke Qiao Bing Zhang Jun Cai School of Metallurgical Engineering Xi'an University of Architecture and Technology National and Local Joint Engineering Research Center for Functional Materials Processing Xi'an University of Architecture and Technology

Low-carbon steel plates were successfully subjected to normal friction stir processing(NFSP) in air and submerged friction stir processing(SFSP) under water, and the microstructure, mechanical properties, and corrosion behavior of the NFSP and SFSP samples were investigated. Phase transformation and dynamic recrystallization resulted in fine-grained ferrite and martensite in the processed zone. The SFSP samples had smaller ferrites(5.1 μm), finer martensite laths(557 nm), and more uniform distribution of martensite compared to the NFSP samples. Compared to the base material(BM), the microhardness of the NFSP and SFSP samples increased by 19.8% and 27.1%, respectively because of the combined strengthening effects of grain refinement, phase transformation, and dislocation. The ultimate tensile strengths(UTSs) of the NFSP and SFSP samples increased by 27.1% and 38.7%, respectively. Grain refinement and martensite transformation also improved the electrochemical corrosion properties of the low-carbon steel. Overall, the SFSP samples had better mechanical properties and electrochemical corrosion resistance than the NFSP samples.

关键词： low-carbon steel friction stir processing microstructure mechanical properties corrosion

Friction Stir Processing of Magnesium Alloys:A Review

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2020年第1期33卷 43-57页

作者： Wen Wang Peng Han Pai Peng Ting Zhang Qiang liu Sheng-Nan Yuan li-ying huang Hai-liang Yu Ke Qiao Kuai-She Wang School of Metallurgical Engineering Xi’an University of Architecture and TechnologyXi’an 710055China National and Local Joint Engineering Research Center for Functional Materials Processing Xi’an 710055China Experimental Teaching Demonstration Center for Materials Processing Xi’an University of Architecture and TechnologyXi’an 710055China College of Mechanical and Electrical Engineering Central South UniversityChangsha 410083China

Magnesium(Mg)alloys have been extensively used in various fields,such as aerospace,automobile,electronics,and biomedical industries,due to their high specific strength and stiff ness,excellent vibration absorption,electromagnetic shielding eff ect,good machinability,and *** stir processing(FSP)is a severe plastic deformation technique,based on the principle of friction stir *** addition to introducing the basic principle and advantages of FSP,this paper reviews the studies of FSP in the modification of the cast structure,superplastic deformation behavior,preparation of finegrained Mg alloys and Mg-based surface composites,and additive *** not only refines,homogenizes,and densifies the microstructure,but also eliminates the cast microstructure defects,breaks up the brittle and network-like phases,and prepares fine-grained,ultrafine-,and nano-grained Mg ***,FSP significantly improves the comprehensive mechanical properties of the alloys and achieves low-temperature and/or high strain rate ***,FSP can produce particle-and fiber-reinforced Mg-based surface *** a promising additive manufacturing technique of light metals,FSP enables the additive manufacturing of Mg ***,we prospect the future research direction and application with friction stir processed Mg alloys.

关键词： Friction stir processing Magnesium alloy Superplasticity Grain refinement Mg-based surface composites Additive manufacturing

Comparison between multiple logistic regression and machine learning methods in prediction of abnormal thallium scans in type 2 diabetes

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2023年第33期11卷 7951-7964页

作者： Chung-Chi Yang Chung-Hsin Peng li-ying huang Fang Yu Chen Chun-Heng Kuo Chung-Ze Wu Te-lin Hsia Chung-Yu lin Division of Cardiovascular Medicine Taoyuan Armed Forces General HospitalTaoyuan City 32551Taiwan Division of Cardiovascular Tri-service General HospitalTaipei City 114202TaiwanChina Department of Urology Cardinal Tien HospitalNew Taipei City 23148TaiwanChina School of Medicine Fu-Jen Catholic UniversityNew Taipei City 242062TaiwanChina Department of Internal Medicine Department of Medical EducationSchool of MedicineFu Jen Catholic University HospitalNew Taipei City 243TaiwanChina School of Medicine College of MedicineFu Jen Catholic UniversityNew Taipei City 243TaiwanChina Department of Endocrinology Fu Jen Catholic University HospitalNew Taipei City 243TaiwanChina Division of Endocrinology and Metabolism Department of Internal MedicineFu Jen Catholic University HospitalNew Taipei City 243TaiwanChina Division of Endocrinology Shuang Ho HospitalNew Taipei City 23561TaiwanChina School of Medicine Taipei Medical UniversityTaipei City 11031TaiwanChina Department of Internal Medicine Cardinal Tien HospitalNew Taipei City 23148TaiwanChina Department of Cardiology Fu Jen Catholic University HospitalNew Taipei City 24352TaiwanChina Graduate Institute of Business Administration Fu Jen Catholic UniversityNew Taipei City 242062TaiwanChina

BACKGROUND The prevalence of type 2 diabetes(T2D)has been increasing dramatically in recent decades,and 47.5%of T2D patients will die of cardiovascular ***-201 myocardial perfusion scan(MPS)is a precise and noninvasive method to detect coronary artery disease(CAD).Most previous studies used traditional logistic regression(LGR)to evaluate the risks for abnormal *** developing machine learning(Mach-L)techniques could potentially outperform LGR in capturing non-linear *** To aims were:(1)Compare the accuracy of Mach-L methods and LGR;and(2)Found the most important factors for abnormal *** 556 T2D were enrolled in the study(287 men and 269 women).Demographic and biochemistry data were used as independent variables and the sum of stressed score derived from MPS scan was the dependent *** with a MPS score≥9 were defined as *** addition to traditional LGR,classification and regression tree(CART),random forest,Naïve Bayes,and eXtreme gradient boosting were also ***,specificity,accuracy and area under the receiver operation curve were used to evaluate the respective accuracy of LGR and Mach-L *** Except for CART,the other Mach-L methods outperformed LGR,with gender,body mass index,age,low-density lipoprotein cholesterol,glycated hemoglobin and smoking emerging as the most important factors to predict abnormal *** Four Mach-L methods are found to outperform LGR in predicting abnormal TMPS in Chinese T2D,with the most important risk factors being gender,body mass index,age,low-density lipoprotein cholesterol,glycated hemoglobin and smoking.

关键词： Myocardial perfusion scintigraphy Machine learning Type 2 diabetes Thallium-201

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

大鼠坐骨神经干内S-100蛋白检测

解剖学杂志 1996年第1期19卷 52-53页

作者：李勇黄瀛第二军医大学解剖学教研室

用Western Blot方法确认周围神经干内含有S-100,然后运用免疫组化PAP方法对Wistar大鼠坐骨神经的近侧和远侧进行S-100检测,染色结果用电子计算机图像处理系统分析处理。结果显示:S-100分布于周围神经束间膜、雪旺氏细胞浆内及细胞膜上,... 详细信息

用Western Blot方法确认周围神经干内含有S-100,然后运用免疫组化PAP方法对Wistar大鼠坐骨神经的近侧和远侧进行S-100检测,染色结果用电子计算机图像处理系统分析处理。结果显示:S-100分布于周围神经束间膜、雪旺氏细胞浆内及细胞膜上,神经轴索内未见有S-100存在,图像处理结果证实,正常大鼠坐骨神经干内的S-100呈均匀分布。

关键词：坐骨神经神经营养因子 S-100蛋白

EZH2-dependent myelination following sciatic nerve injury

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第8期20卷 2382-2394页

作者： Hui Zhu li Mu Xi Xu Tianyi huang ying Wang Siyuan Xu Yiting Wang Wencong Wang Zhiping Wang Hongkui Wang Chengbin Xue Research Center of Clinical Medicine Affiliated Hospital of Nantong UniversityKey Laboratory of Neuroregeneration of Jiangsu and Ministry of EducationCo-innovation Center of NeuroregenerationNMPA Key Laboratory for Research and Evaluation of Tissue Engineering Technology ProductsNantong UniversityNantongJiangsu ProvinceChina Medical School of Nantong University NantongJiangsu ProvinceChina Department of Neurology Affiliated Hospital of Nantong UniversityNantongJiangsu ProvinceChina Department of Rehabilitation Medicine Affiliated Hospital of Nantong UniversityNantongJiangsu ProvinceChina Department of Critical Care Medicine Nantong Fourth People’s HospitalNantongJiangsu ProvinceChina

Demyelination and remyelination have been major focal points in the study of peripheral nerve regeneration following peripheral nerve ***,the gene regulatory network of regenerated myelin differs from that of native *** of enhancer of zeste homolog 2(EZH2)hinders the differentiation,maturation,and myelination of Schwann cells in *** further determine the role of EZH2 in myelination and recovery post-peripheral nerve injury,conditional knockout mice lacking Ezh2 in Schwann cells(Ezh2^(fl/fl);Dhh-Cre and Ezh2^(fl/fl);Mpz-Cre)were *** results show that a significant proportion of axons in the sciatic nerve of Ezh2-depleted mice remain *** highlights the crucial role of Ezh2 in initiating Schwann cell ***,we observed that 21 days after inducing a sciatic nerve crush injury in these mice,most axons had remyelinated at the injury site in the control nerve,while Ezh2^(fl/fl);Mpz-Cre mice had significantly fewer remyelinated axons compared with their wild-type *** suggests that the absence of Ezh2 in Schwann cells impairs myelin formation and *** conclusion,EZH2 has emerged as a pivotal regulatory factor in the process of demyelination and myelin regeneration following peripheral nerve *** EZH2 activity during these processes may offer a promising therapeutic target for the treatment of peripheral nerve injuries.

关键词： demyelination EZH2 myelination peripheral nerve injury PRC2 remyelination Schwann cells sciatic nerve crush sciatic nerve transection

Enhanced post-combustion CO2 capture and direct air capture by plasma surface functionalization of graphene adsorbent

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 653-664页

作者： Rahul Navik Eryu Wang Xiao Ding huang Yunyi Yiyu liu Jia li Guangdong-Hong Kong Joint Laboratory for Carbon Neutrality Jiangmen Laboratory of Carbon and Science and Technology Guangzhou HKUST Fok ying Tung Research Institute The Hong Kong University of Science and Technology (Guangzhou) Carbon Neutrality and Climate Change Thrust Society Hub The Hong Kong University of Science and Technology (Guangzhou) Stoddart Institute of Molecular Science Department of Chemistry Zhejiang University

Graphene has enormous potential to capture CO2due to its unique properties and ***,graphene-based adsorbents have drawbacks of lower CO2adsorption capacity and poor *** work demonstrates a one-step rapid and sustainable N2/H2plasma treatment process to prepare graphene-based sorbent material with enhanced CO2adsorption *** treatment directly enriches amine species,increases surface area,and improves textural *** CO2adsorption capacity increases from 1.6 to 3.3 mmol/g for capturing flue gas,and from 0.14 to 1.3 mmol/g for direct air capture （DAC）.Importantly,the electrothermal property of the plasma-modified aerogels has been significantly improved,resulting in faster heating rates and significantly reducing energy consumption compared to conventional external heating for regeneration of *** aerogels display improved selectivity of 42 and 87 after plasma modification for 5 and 10 min,*** plasma-treated aerogels display minimal loss between 17%and 19% in capacity after 40 adsorption/desorption cycles,rendering excellent *** N2/H2plasma treatment of adsorbent materials would lower energy expenses and prevent negative effects on the global economy caused by climate change.

关键词： Carbon neutrality CO 2 capture Climate change Plasma treatment Graphene aerogel

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

非理想1/4波片对泵浦光偏振态的影响

中国光学 2017年第2期10卷 226-233页

作者：陈运达汪之国江奇渊李莹颖黄云国防科学技术大学光电科学与工程学院湖南长沙410073

为了研究调整架角度误差以及波片与光源波长不匹配对线偏振光经过1/4波片之后偏振态的影响,本文利用坐标变换法得到1/4波片的琼斯矩阵,并用琼斯矩阵表示各偏振态。推导出波片与光源不匹配时对偏振态的影响理论模型。当考虑到调整架的角... 详细信息

为了研究调整架角度误差以及波片与光源波长不匹配对线偏振光经过1/4波片之后偏振态的影响,本文利用坐标变换法得到1/4波片的琼斯矩阵,并用琼斯矩阵表示各偏振态。推导出波片与光源不匹配时对偏振态的影响理论模型。当考虑到调整架的角度误差时,对入射光偏振态以及波片的琼斯矩阵表达式做引入角度误差的泰勒展开,最后得到和实验结果匹配的仿真曲线。仿真结果表明,当采用808 nm 1/4波片对795 nm波长的线偏振光作用时,在不考虑调整误差的理想情况下出射光椭圆度最高为0.9746,考虑调整误差时,对应理想情况下椭圆度最高为0.96,椭圆度最高点偏移1.72°。仿真和实验结果为进一步分析泵浦光椭圆度对原子参数的影响提供了依据。

关键词：偏振光 1/4波片琼斯矩阵泰勒展开

在线全文

学校读者我要写书评

暂无评论

钠离子电池三元正极材料的研究进展

电池 2016年第5期46卷 285-288页

作者：李名英黄象金东莞市迈科新能源有限公司广东东莞523800

介绍钠离子电池三元正极材料,如Ni-Co-Mn、Ni-Fe-Mn等的研究进展。概述钠离子三元正极材料在掺杂、包覆和表面预处理等改性方面的研究情况。分析三元材料今后的研究重点,为钠离子电池三元正极材料的研究与应用提供指导。

关键词：钠离子电池三元正极材料过渡金属氧化物改性

在线全文

学校读者我要写书评

暂无评论

峰峰矿烟煤超临界流体抽提产物的结构分析

燃料化学学报 1993年第2期21卷 211-218页

作者：李柏龄李英杨煌陈邦杰中国科学院山西煤炭化学研究所太原030001

选用了峰峰矿不同变质程度的三种烟煤为原料,在20MPa,340℃条件下,以甲苯为溶剂进行超临界抽提。采用溶剂萃取和硅胶色谱法将抽出油分为F_1～F_6六个馏分,从各馏分的~1H-NMR谱图、^(13)C-NMR谱图和IR光谱图分析了它们的组成、结构;由元... 详细信息

选用了峰峰矿不同变质程度的三种烟煤为原料,在20MPa,340℃条件下,以甲苯为溶剂进行超临界抽提。采用溶剂萃取和硅胶色谱法将抽出油分为F_1～F_6六个馏分,从各馏分的~1H-NMR谱图、^(13)C-NMR谱图和IR光谱图分析了它们的组成、结构;由元素分析和平均分子量数据,采用~1H-NMR谱和^(13)C-NMR谱相结合的计算方法,获得了各馏分的平均结构参数。实验结果表明:随着变质程度的不同三种烟煤的组成结构存在着差异,焦煤抽出物中的油含量较高(35.6%),瘦煤抽出物中的沥青烯含量较高(67.7%);三种烟煤中瘦煤的芳碳率最高,而肥煤比焦煤、瘦煤有较长的烷基侧链。

关键词：烟煤核磁共振煤液化