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Chinese journal of Electrical Engineering 2024年第1期10卷 1-2页

作者： Li j. Mei H. Li s. Tianjin University China Tsinghua shenzhen International Graduate school China Lanzhou jiaotong University China

The rapid development of clean and renewable energy technologies represented by wind and solar energy,as well as the continuous growth of load demand,have put forward higher requirements for the safe operation of the power *** performance of power equipment based on traditional dielectric materials is often limited by various defects generated during molding,transportation,assembly,and operation,which cannot meet the reliability requirements of power systems in the new *** detection is an essential technical method in industrial development,which can detect and evaluate the defect and damage status of in-service equipment,key components,and materials without damaging the object.

关键词： service Application operation

Wind power potential over northern south America using ERA5-Land global reanalysis

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Clean Energy 2024年第2期8卷 104-112页

作者： Heli A.Arregocés Guillermo j.Bonivento Roberto Rojano Grupo de Investigación GIsA Facultad de IngenieríaUniversidad de La GuajiraRiohachaColombia Grupo Procesos Fisicoquímicos Aplicados Facultad de IngenieríaUniversidad de Antioquia SIU/UdeACalle 70 No.52-21MedellínColombia

The northernmost region of south America has great potential for wind energy production and is a strategic area for the energy tran*** analysed data from ERA5-Land global reanalysis from 1980 to 2020 to determine the wind power potential in this *** aim was to identify areas with a high potential for wind energy that could be used to supply energy in case of drought in the region or increases in fuel *** compared data from 19 meteorological stations located in Colombia with ERA5-Land reanalysis data to generate reliable information for the feasibility and operation of wind *** to our analysis,the Colombian Caribbean and Coastal Plain have monthly average wind speeds at 90 m ranging from 4.85 to 10.34 m/s and 3.79 to 6.62 m/s,*** on wind power density calculations,these regions have the highest wind power density in our study,with a monthly average of between 250 and 399 W/m^(2).The Caribbean Region had a 69%increase in wind power density from january to july compared with the annual *** wind power density in the plains increased from january to March,while the Mountain Region had higher anomalies from May to *** Alta Guajira and ParaguanáPeninsula have great potential to generate wind energy due to their privileged geographical *** ERA5 offers valuable information about wind availability in time and space,it cannot represent the influence of local effects on wind patterns for the Mountain Region.

关键词： onshore wind power wind power potential ERA5-Land global reanalysis wind speed

superplasticity of fine-grained Mg-10Li alloy prepared by severe plastic deformation and understanding its deformation mechanisms

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journal of Magnesium and Alloys 2024年第1期12卷 316-331页

作者： H.T.jeong s.W.Lee W.j.Kim Department of Materials science and Engineering Hongik UniversityMapo-guSangsu-dong 72-1Seoul 121-791Republic of Korea

The superplastic behavior and associated deformation mechanisms of a fine-grained Mg-10.1 Li-0.8Al-0.6Zn alloy(LAZ1011)with a grain size of 3.2μm,primarily composed of the BCCβphase and a small amount of the HCPαphase,were examined in a temperature range of 473 K to 623 *** microstructural refinement of this alloy was achieved by employing high-ratio differential speed *** best superplasticity was achieved at 523 K and at strain rates of 10^(-4)-5×10^(-4)s^(-1),where tensile elongations of 550±600%were *** the heating and holding stage of the tensile samples prior to tensile loading,a significant increase in grain size was observed at temperatures above 573 ***,it was important to consider this effect when analyzing and understanding the superplastic deformation behavior and *** the investigated strain rate range,the superplastic flow at low strain rates was governed by lattice diffusion-controlled grain boundary sliding,while at high strain rates,lattice diffusion-controlled dislocation climb creep was the rate-controlling deformation *** was concluded that solute drag creep is unlikely to *** the late stages of deformation at 523 K,it was observed that grain boundary sliding led to the agglomeration of theαphase,resulting in significant strain *** mechanism maps were constructed forβ-Mg-Li alloys in the form of 2D and 3D formats as a function of strain rate,stress,temperature,and grain size,using the constitutive equations for various deformation mechanisms derived based on the data of the current tests.

关键词： Magnesium-lithium alloy superplasticity severe plastic deformation Grain size Grain growth

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Compressive property and energy absorption characteristic of interconnected porous Mg-Zn-Y alloys with adjusting Y addition

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journal of Magnesium and Alloys 2024年第1期12卷 171-185页

作者： j.A.Liu s.j.Liu B.Wang W.B.sun X.j.Liu Z.W.Han College of Materials science and Engineering Key Laboratory of Automobile Materials(Ministry of Education)Jilin UniversityChangchun 130022PR China Key Laboratory of Bionic Engineering(Ministry of Education) College of Biological and Agricultural EngineeringJilin UniversityChangchun130022PR China Weihai Institute for Bionics-jilin University Weihai 264205PR China

In this study,interconnected porous Mg-2Zn-xY alloys with different phase compositions were prepared by various Y additions(x=0.4,3,and 6 wt.%)to adjust the compressive properties and energy absorption *** characterization methods were then applied to identify the microstructure of the porous Mg-Zn-Y and describe the details of the second *** tests were performed at room temperature(RT),200℃,and 300℃to study the impact of the Y addition and testing temperature on the compressive properties of the porous *** experimental results showed that a high Y content promotes a microstructure refinement and increases the volume fraction of the second *** the Y content increases,different Mg-Zn-Y ternary phases appear:I-phase(Mg_(3)Zn_(6)Y),W-phase(Mg_(3)Zn_(3)Y_(2)),and LPsO phase(Mg_(12)ZnY).When the Y content ranges between 0.4%and 6%,the compressive strength increases from 6.30MPa to 9.23 MPa,and the energy absorption capacity increases from 7.33 Mj/m^(3)to 10.97 Mj/m^(3)at RT,which is mainly attributed to the phase composition and volume fraction of the second ***,the average energy absorption efficiency is independent of the Y *** addition,the compressive deformation behaviors of the porous Mg-Zn-Y are altered by the testing *** compressive strength and energy absorption capacity of the porous Mg-Zn-Y decrease due to the softening effect of the high temperature on the *** deformation behaviors at different temperatures are finally observed to reflect the failure mechanisms of the struts.

关键词： Porous magnesium Rare earth elements Microstructure Compressive behavior Energy absorption characteristic

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前列腺癌:MR扩散加权成像对侵袭性的检测与评估——常规成像与扩散峰度比较

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国际医学放射学杂志 2017年第5期 588-588页

作者： T.Tamada V.Prabhu j.Li j.s.babb s.s.Taneja A.B.Rosenkrantz 张小琨 Department of Radiology Kawasaki Medical School

摘要目的在一个大的病人队列中比较标准DW成像与扩散峰度(DK)成像对前列腺癌(PC)的检测和界定,特别是DK成像潜在的额外价值。材料与方法本回顾性研究经

关键词： ADC Gs 良恶性 MR 前列腺癌

低剂量对比剂3D MR肾图定量评价移植肾急性肾功能不全

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国际医学放射学杂志 2011年第6期 581-581页

作者： A.Yamamoto H.Rusinek H.Chandarana P.H.Vivier j.s.babb 王焕军 Department of Radiology New York University School of Medicine660 First Ave4th FloorNew YorkNY 10016

目的前瞻性评价低剂量对比剂3DMR肾图在鉴别移植肾急性肾功能不全原因方面的作用。材料与方法本研究符合HIPAA要求,经学术审查委员会批准,并获得病人书面知情同意。自2001年12月—2009年5月,肾移植者共60例(男41例,女19例;年龄22～71岁... 详细信息

目的前瞻性评价低剂量对比剂3DMR肾图在鉴别移植肾急性肾功能不全原因方面的作用。材料与方法本研究符合HIPAA要求,经学术审查委员会批准,并获得病人书面知情同意。自2001年12月—2009年5月,肾移植者共60例(男41例,女19例;年龄22～71岁,平均49岁)。肾

关键词：肾功能不全肾功能障碍肾图低剂量对比剂移植肾 MR

前列腺3.0T计算机处理DWI影像质量及肿瘤检出的影响

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国际医学放射学杂志 2014年第1期 91-91页

作者： A.B.Rosenkrantz H.Chandarana N.Hindman F.M.Deng j.s.babb s.s.Taneja 袁涛 Department of Radiology Center for Biomedical Imaging NYU School of Medicine660 First AvenueNey YorkNY 10016USA

目的探讨3 T MRI计算机化前列腺DWI对影像质量及肿瘤检出的影响。方法对49例病人于前列腺切除术前采用盆腔相控阵线圈行3 T MRI,b值为50及1 000 s/mm2。

关键词：前列腺癌 MRI DWI b值前列腺切除术

single-atom Pt on carbon nanotubes for selective electrocatalysis

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Carbon Energy 2024年第1期6卷 63-71页

作者： samuel s.Hardisty Xiaoqian Lin Anthony R.j.Kucernak David Zitoun Department of Chemistry Bar Ilan Institute of Nanotechnology and Advanced Materials(BINA)Bar Ilan UniversityRamat GanIsrael Department of Chemistry Molecular Science Research HubImperial College LondonLondonUK

Utilizing supported single atoms as catalysts presents an opportunity to reduce the usage of critical raw materials such as platinum,which are essential for electrochemical reactions such as hydrogen oxidation reaction(HOR).Herein,we describe the synthesis of a Pt single electrocatalyst inside single-walled carbon nanotubes(sWCNTs)via a redox *** via electron microscopy,X-ray photoelectron microscopy,and X-ray absorption spectroscopy show the single-atom nature of the *** electrochemical behavior of the sample to hydrogen and oxygen was investigated using the advanced floating electrode technique,which minimizes mass transport limitations and gives a thorough insight into the activity of the *** single-atom samples showed higher HOR activity than state-of-the-art 30%Pt/C while almost no oxygen reduction reaction activity in the proton exchange membrane fuel cell operating *** selective activity toward HOR arose as the main fingerprint of the catalyst confinement in the sWCNTs.

关键词： confinement electrocatalysis hydrogen platinum single atom catalysts

数据高度低采样稀疏重建屏气三维MR胆胰管成像

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国际医学放射学杂志 2016年第5期 577-577页

作者： H.Chandarana A.M.Doshi A.shanbhogue j.s.babb M.T.Bruno T.j.Zhao 刘萍 Department of Radiology New York University School of Medicine

摘要目的研发一种新的MR胆胰管成像(MRCP)扫描方法:基于5%k空间预采样数据稀疏迭代重建屏气(BH)多翻转角三维快速自旋回波(BH sPARsE-sPACE),并将其与常规呼吸触发(RT sPACE)结果进行比较。材料与方法这项符合HIPAA的前瞻性研究获得伦... 详细信息

摘要目的研发一种新的MR胆胰管成像(MRCP)扫描方法:基于5%k空间预采样数据稀疏迭代重建屏气(BH)多翻转角三维快速自旋回波(BH sPARsE-sPACE),并将其与常规呼吸触发(RT sPACE)结果进行比较。材料与方法这项符合HIPAA的前瞻性研究获得伦理委员会批准。应用3 T设备对29例病人进行了常规RT sPACE及BH加速5%k空间数据采样sPACE扫描。两者空间分辨率和其他参数尽可

关键词：胆胰管成像 MR 稀疏重建

限定元素分析在近段股骨微观结构3 T MR成像的应用:有脆弱性骨折的病人骨强度较正常受试者低

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国际医学放射学杂志 2014年第5期 484-484页

作者： G.Chang s.Honig R.Brown C.M.Deniz K.A.Egol j.s.babb 魏渭 Department of Radiology Center for Musculoskeletal CareNYU Langone Medical Center

摘要目的判断使用近段股骨微观结构3 T MR影像中的限定元素分析完成检测骨折病人相比于正常受试的较低骨强度的可行性。材料与方法本次前瞻性研究获得了伦理

关键词：股骨下肢骨近段骨强度 T MR 受试者元素分析微观结构