检索结果-南通市图书馆

Accelerating bainite transformation by concurrent pearlite formation in a medium Mn steel:Experiments and modelling

journal of Materials Science & Technology 2024年第9期176卷 211-223页

作者： L.K.huang f.Liu M.X.huang Department of Mechanical Engineering The University of Hong KongPokfulam RoadHong KongChina State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’anShaanxi710072China

Bainite transformation has yet to be utilized and even thoroughly studied in medium Mn ***,we investigate the isothermal bainite transformation in a 10Mn steel at 450°C experimentally and theoretically,focusing on the effect of dislocations introduced by warm *** show that the bainite transformation in the studied medium Mn steel exhibits extremely sluggish kinetics(on a time scale of days),concurrent with the pearlite *** introduced dislocations can significantly accelerate bainite transformation kinetics while also facilitating the pearlite *** is likely the first report on the simultaneous occurrence of these two solid-state reactions in medium Mn *** respect to the roles of dislocations in the acceleration of bainite transformation observed in this work,we propose a new‘carbon depletion mechanism’,in which dislocations-stimulated pearlite formation makes a twofold contribution:facilitating the formation of bainitic ferrite sub-units to further enhance the autocatalytic effect and preventing the carbon enrichment in the remaining *** this basis,a physical model is developed to quantitatively understand the bainite transformation kinetics considering the effect of concurrent pearlite formation,revealing good agreements between model descriptions and experiment *** findings,herein,offer fundamental insights into the bainite transformation in medium Mn steels and uncover a previously unidentified role played by introduced dislocations in influencing the kinetics of bainite formation,which may guide its future application in manipulating microstructure for the development of advanced high-strength steels.

关键词： Medium Mn steels Bainite Thermodynamics Kinetics Phase transformation

来源：

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

Recent Achievements in Developing Low Temperature and High Strain Rate Superplastic Materials

引用

journal of Materials Science & Technology 2001年第1期17卷 19-20页

作者： j.C huang Inst.Materials Science and Engineering Sun Yat-Son UniversityKaohsiungTaiwan 804China

This paper is to briefly outline our recent activities in developing low temperature or high strain rate superplastic materials, including aircraft-used and general-purpose Al- and Mg-base alloys or composites. as well as Ti3AI base intermetallic alloys. The processing routes applied included the thermomechanical treatment, equal channel angular pressing and other extrusion or forging methods.

关键词： High Strain Rate thermomechanical treatment intermetallic alloys processing routes high strain rate low temperature

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

小麦抗条锈基因Yr5、Yr9和Yr18分子标记的特异性评估

引用

麦类作物学报 2025年第1期45卷 45-51页

作者：孙振宇黄亮黄苗苗刘太国甘肃省农业科学院植物保护研究所甘肃兰州730070 中国农业科学院植物保护研究所植物病虫害综合治理全国重点实验室北京100193 青海大学农林科学院青海西宁810016

Yr5、Yr9(1B/1R)、Yr18基因的自身性状或连锁性状在中国小麦育种中具有重要的应用前景。本研究运用以Avocet S为背景的单基因近等基因系及其对应基因的载体品种,对Yr5基因的连锁标记STS9/10,Yr9(1B/1R)基因的分子标记Af1/4、D15、20H,Y... 详细信息

Yr5、Yr9(1B/1R)、Yr18基因的自身性状或连锁性状在中国小麦育种中具有重要的应用前景。本研究运用以Avocet S为背景的单基因近等基因系及其对应基因的载体品种,对Yr5基因的连锁标记STS9/10,Yr9(1B/1R)基因的分子标记Af1/4、D15、20H,Yr18基因的分子标记csLV34、cssfr1~cssfr5进行有效性验证。结果表明,Yr5基因的特异性分子标记STS9/10、Yr9(1B/1R)基因的特异性分子标记Af1/4、D15和20H均能够准确识别不同遗传背景材料中的相应抗性基因;Yr18基因分子标记cssfr2能够准确检测Yr18的非载体材料,并检测出Avocet S*6/Yr5、Avocet S*6/Yr24、Avocet S*6/Yr27三个材料具有Yr18的等位变异。这说明Yr5基因的连锁标记STS9/10,Yr9(1B/1R)基因的分子标记Af1/4、D15、20H能对目的基因进行有效检测,Yr18基因的几个分子标记结合使用不仅能够对目的基因进行有效检测,而且能够识别该位点的等位变异。

关键词：抗条锈基因分子标记特异性

来源：

维普期刊数据库

同方期刊数据库博看期刊

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

地中海贫血夫妇孕育的245例儿童体检结果分析

引用

中国儿童保健杂志 2017年第11期25卷 1163-1165页

作者：林向斌韩宙欣李治亲黄坚福龙昌海南省计划生育服务中心海南海口570203

目的了解海南农村地中海贫血(简称"地贫")夫妇孕育的儿童体格生长发育状况,做好地贫儿童的健康促进工作。方法对海南农村地贫夫妇所孕育的245例儿童进行问诊及体检,将检测值与参照标准进行对照评估。结果男童和女童的生长迟缓率、低体... 详细信息

目的了解海南农村地中海贫血(简称"地贫")夫妇孕育的儿童体格生长发育状况,做好地贫儿童的健康促进工作。方法对海南农村地贫夫妇所孕育的245例儿童进行问诊及体检,将检测值与参照标准进行对照评估。结果男童和女童的生长迟缓率、低体重率、消瘦率分别依次为6.4%、24.1%、26.2%和9.6%、29.8%、24%,两者相应指标比较差异均无统计学意义;超重共3例,无肥胖者。整体上的生长迟缓率为7.8%,低体重率为26.5%,消瘦率25.3%;携带地贫基因202例占82.4%,以中间型α-地贫组的Hb平均值最低[(87.8±8.7)g/L],且与未携带地贫基因组的Hb平均值[(116.8±16.31)g/L]比较差异有统计学意义。结论海南农村地贫夫妇孕育儿童的营养不良状况患病率高,其贫血与地贫基因缺失或突变严重程度密切相关。因此,有必要加强携带地贫基因的儿童健康养育的指导,以提高其健康养育水平。

关键词：地中海贫血一级预防营养不良健康养育

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Solder Size Effect on Early Stage Interfacial Intermetallic Compound Evolution in Wetting Reaction of Sn3.0Ag0.5Cu/ENEPIG joints

引用

journal of Materials Science & Technology 2015年第3期31卷 252-256页

作者： M.L.huang f.Yang Electronic Packaging Materials Laboratory School of Materials Science & Engineering Dalian University of Technology

Solder size effect on early stage interfacial intermetallic compound(IMC) evolution in wetting reaction between Sne3.0Age0.5Cu solder balls and electroless nickel electroless palladium immersion gold(ENEPIG) pads at 250 C was investigated. The interfacial IMCs transformed from initial needle- and rodtype(Cu,Ni)6Sn5to dodecahedron-type(Cu,Ni)6Sn5and then to needle-type(Ni,Cu)3Sn4at the early interfacial reaction stage. Moreover, these IMC transformations occurred earlier in the smaller solder joints, where the decreasing rate of Cu concentration was faster due to the Cu consumption by the formation of interfacial(Cu,Ni)6Sn5. On thermodynamics, the decrease of Cu concentration in liquid solder changed the phase equilibrium at the interface and thus resulted in the evolution of interfacial IMCs; on kinetics, larger solder joints had sufficient Cu flux toward the interface to feed the(Cu,Ni)6Sn5growth in contrast to smaller solder joints, thus resulted in the delayed IMC transformation and the formation of larger dodecahedron-type(Cu,Ni)6Sn5grains. In smaller solders, no spalling but the consumption of(Cu,Ni)6Sn5grains by the formation of(Ni,Cu)3Sn4grains occurred where smaller discrete(Cu,Ni)6Sn5grains formed at the interface.

关键词： Size effect Lead-free solder Interfacial reaction

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Hot Cracking in AZ31 and AZ61 Magnesium Alloy

引用

journal of Materials Science & Technology 2011年第7期27卷 633-640页

作者： C.j. huang C.M. Cheng C.P. Chou f.H. Chen Department of Mechanical Engineering National Chiao Tung University Hsinchu 300 Taiwan China Department of Industrial Education National Taiwan Normal University Taipei 106 Taiwan China

This paper examined the impact of the number of thermal cycles and augmented strain on hot cracking in AZ31 and AZ61 magnesium alloy. Statistical analyses were performed. following observation using a scanning electron microscope （SEM）, an energy dispersive spectrometer （EDS） was used for component analysis. Results showed that Al content in magnesium alloy has an effect on hot cracking susceptibility. In addition, the nonequilibrium solidification process produced segregation in Al content, causing higher liquid Mg-alloy rich Al content at grain boundaries, and resulting into liquefied grain boundaries of partially melted zone （PMZ）. In summary, under multiple thermal cycles AZ61 produced serious liquation cracking. AZ61 has higher （6 wt%） Al content and produced much liquefied Mg17Al12 at grain boundaries under multiple thermal cycles. The liquefied Mg17Al12 were pulled apart and hot cracks formed at weld metal HAZ due to the augmented strain. Since AZ31 had half the Al content of AZ61, its hot-cracking susceptibility was lower than AZ61. In addition, AZ61 showed longer total crack length （TCL） in one thermal cycle compared to that in three thermal cycles. This phenomenon was possibly due to high-temperature gasification of Al during the welding process, which resulted in lower overall Al content. Consequently, shorter hot cracks exhibited in three thermal cycles. It was found the Al content of AZ31 and AZ61 can be used to assess the hot-cracking susceptibility.

关键词： Varestraint test Thermal cycles Hot-cracking susceptibility Gas tungsten arc welding (GTAW) AZ31 AZ61

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Structure and Magnetic Properties of Magnetostrictive feGa film on Single-Crystal(100) GaAs and(001) Si Substrate fabricated by Pulsed Laser Deposition

引用

Acta Metallurgica Sinica(English Letters) 2018年第6期31卷 623-628页

作者： Y.Zhang M.Turghun C.j.huang T.Wang f.f.Wang W.Z.Shi Key Laboratory of Optoelectronic Material and Device Shanghai Normal University Mathematics and Science College Shanghai Normal University

feGa thin film has been deposited on（100）-oriented GaAs and（001）-oriented Si substrates with different film thicknesses and laser energy densities at room temperature by pulsed laser deposition *** structure and static magnetic of feGa film have great changes depending on the substrate and energy density of pulsed laser.X-ray diffraction reveals the presence of first-order order–disorder structure ofgrain phase and disordered bcc A2 structure on GaAs *** coercivity and remanence of feGa film on GaAs substrate ratio show a regular dependence on the thickness and energy ***,film on Si substrate did not exhibit structure change,which can be attributed to a large lattice mismatch between feGa and Si.

关键词： Magnetostrictive film Soft magnetic film Texture Galfenol

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

HCV genotypes in hepatitis C patients and their clinical significances

引用

World journal of Gastroenterology 1999年第6期5卷 547-549页

作者： huang f Zhao GZ Li Y China Med Univ Affiliated Hosp 2 Dept Infect Dis Shenyang 110003 Liaoning Prov Peoples R China

INTRODUCTIONIt has been discovered that hepatitis C virus (HCV) presents considerable nucleotide variation and has many genotypes. At least twelve, 5 of which prevalent, i.e.: Ⅰ/1a, Ⅱ/1b, Ⅲ/2a, Ⅳ/2b, and Ⅴ/3a types. The different genotypes of HCV may possess some retationship with regional distribution, clinical manifestation, response to treatment and prognosis of HCV infection, thus to study the genotypes of HCV further in different areas is of practical value. We detected HCV genotypes in 94 patients with hepatitis C and in 6 patients with primary hepatocarcinoma by PCR assay with four kinds of type-specific primers with a view to study the distribution of HCV genotypes in hepatitis C in Shenyang area and their clinical significances.

关键词： hepatitis C hepatitis C virus genotyping

来源：

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

DCaT:面向高分辨率场景的轻量级语义分割模型

引用

计算机工程与应用 2025年第1期61卷 252-262页

作者：黄科迪黄鹤鸣李伟樊永红青海师范大学计算机学院西宁810008 藏语智能信息处理及应用国家重点实验西宁810008

语义分割是计算机视觉中分析和理解场景的关键任务,但现有的分割模型需要较高的计算成本和内存需求,不适合高分辨率场景的轻量级语义分割。针对该问题,提出了一种新的面向高分辨率场景的轻量级语义分割模型DCaT。采用深度可分离卷积提... 详细信息

语义分割是计算机视觉中分析和理解场景的关键任务,但现有的分割模型需要较高的计算成本和内存需求,不适合高分辨率场景的轻量级语义分割。针对该问题,提出了一种新的面向高分辨率场景的轻量级语义分割模型DCaT。采用深度可分离卷积提取图像的局部语义;使用基于坐标感知和动态稀疏混合注意力的轻量级Transformer获取图像的全局语义;通过模块融合,在低级语义上注入高级语义;通过分割头输出像素预测标签。实验结果表明:与基线模型相比,DCaT在高分辨率数据集Cityscapes上的平均交并比提高了1.5个百分点,模型复杂度降低了26%,推理速度提升了12%。实现了高分辨率场景下模型复杂度与性能之间的更好平衡,证明了DCaT的有效性和实用性。

关键词：语义分割轻量化高分辨率 Transformer 稀疏注意力

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Superplasticity Enhanced by Two-stage Deformation in a Hot-extruded AZ61 Magnesium Alloy

引用

journal of Materials Science & Technology 2005年第1期21卷 71-74页

作者： YinongWANG j.C.huang DepartmentofMaterialsEngineering DalianUniversityofTechnologyDalian116024China InstituteofMaterialsScienceandEngineering NationalSunYat-SanUniversityKaohsiung804TaiwanChina

A two-stage strain rate deformation method is proposed to enhance the superplasticity in a hot extruded AZ61 alloy. In the stage-one of deformation, a relatively high strain rate was applied in order to obtain fine grains through dynamic recrystallization. The optimum strain rate for DRX at 300℃ was identified as -5×10-3s-1. Stage-two is conducted at relatively low strain rate in order to utilize the fine grains refined by DRX during stage-one to make the grain boundary sliding operate more smoothly, which resulting in enhanced superplastic elongation from 350% to 440%.

关键词： AZ61 magnesium alloy Superplasticity Dynamic recrystallization Grain boundary sliding

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：