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Investigation of Optimal Split Ratio of 6-Slot/2-pole High Speed Permanent Magnet Motor with Toroidal Winding

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CES Transactions on Electrical Machines and Systems 2022年第4期6卷 343-351页

作者： f.xu T.R.He Z.Q.Zhu H.Bin D.Wu L.M.Gong J.T.Chen the University of Sheffield Department of Electronic and Electrical EngineeringMappin StreetSheffieldS13JDUK IEEE Motors and Drives Center Midea Group Corporate Research CenterShanghai200131China

Split ratio,*** ratio of stator inner diameter to outer diameter,has a closed relationship with electromagnetic performance of permanent magnet(PM)*** this paper,the toroidal windings with short end-winding axial length are employed in the 6-slot/2-pole(6s/2p)PM motor for high speed *** split ratio is optimized together with the ratio of inner slot to outer slot area,*** ratio,considering stator total loss(stator iron loss and copper loss).In addition,the influence of maximum stator iron flux density and tooth-tip on the optimal split ratio,slot ratio,and average torque is *** analytical predictions show that when the slot ratio is 0.5,the maximum torque can be achieved,and the optimal split ratio increases with the decrease of slot ratio,as confirmed by the finite element(fE)***,some of predicted results are verified by the measured results of 6s/2p prototype motor with 0.5 slot ratio.

关键词： High speed Optimal split ratio Permanent magnet motor Slot ratio Toroidal winding

Recycling of key materials of membrane electrode assembly for PEMfC by acid oxidation method

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Recycling of key materials of membrane electrode assembly fo...

第九届全国氢能学术会议

作者： f.xu,S.C.Mu,M.Pan Wuhan University of Technology,China

＜正＞A simple,high efficient and environmentally friendly approach was investigated to recycle the key materials of MEA（membrane electrode assembly） applied in proton exchange membrane fuel cell（PEMfC）.Currently,the noble metal Pt catalyst and perfluorosulfonic acid membrane widely used in PEMfC are expensive and considered to be environmentally

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Effect of doped Ni-Bi-B alloy on hydrogen generation performance of Al-InCl3

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Journal of Energy Chemistry 2019年第12期28卷 268-274页

作者： Jun Chen f.xu L.Sun Kexiang Zhang Yongpeng Xia Xiaolei Guo Huanzhi Zhang fang Yu Erhu Yan Hongliang Peng Pengru Huang Shujun Qiu Cuili Xiang Yujie Sun Guangxi Key Laboratory of Information Materials Guangxi Collaborative Innovation Center of Structure and Property for New Energy and MaterialsSchool of Material Science and EngineeringGuilin University of Electronic TechnologyGuilin 541004CuangxiChina School of Material Science and Engineering China University of GeosciencesBeijing 100083China

In this work,Ni-Bi-B alloy has been synthesized via chemical synthesis method.A new kind of Al-InCl3-(Ni-Bi-B)composite has been prepared by high energy mechanical ball grinding A1 powder with *** show that the doped Ni-Bi-B alloy can significantly improve the hydrogen generation performance of Al-InCl3 and the catalytic activity is enhanced with the increasing content of Bi in Ni-Bi-B *** optimal conditions,the hydrogen generation yield and conversion yield of Al-InCl3-(Ni-Bi-B)reached1196.8 mL g^-1 and 100.0%at room temperature,*** study shows five kinds of active sites,such as the fresh surface/defect of Al particle,Al-AlCl3,Al-In,Al-Bi/B and Al-Ni/B produced during the ball milling *** synergistic effect enhances the hydrogen generation performance of AlInCl3-(Ni-Bi-B)*** general,the proposed Al-InCl3-(Ni-Bi-B)composite is possible to serve as hydrogen generation material for fuel cells.

关键词： Hydrogen generation Al-H2O reaction Al-InCl3 Ni-Bi-B alloy Ball milling

6-Chemical configuration of hybrid layer in tunneling PV device

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6-Chemical configuration of hybrid layer in tunneling PV dev...

第六届新型太阳能电池材料科学与技术学术研讨会

作者： D.Y.Chen Y.Z.Wan H.W.Du M.Gao Y.H.Li f.xu L.Zhao Z.Q.Ma SHU-SOEN’s R&DLab Department of PhysicsCollege of SciencesShanghai University

Going into a hybrid silicon-based oxide layer with transition metals between TCO and Silicon to well understand its chemical configuration and electronic state is significant for the heterojunction photovoltaic devices, especially, for the two ends tandem PV of PSCs upon SHJ. At present, an amorphous silica layer containing In or Mo component(a-SiO(In,Mo) ～1.5-2.0 nm), as an example, is naturally formed in the process of PVD technique including sputtering or evaporating TCO onto n-type silicon, which plays a significant role on the non-equilibrium carriers’ transport of TCO/n-Si photovoltaic device [1]. The electronic structure and the charge transition levels of the amorphous silicon oxide doped with In or Mo are derived from density functional theory(DfT). The DOS show that the extensional or local states are existed in the band gap of amorphous silicon oxide, caused by the hybridization of electron orbital. The charge transition level of ε(+1/0) is located above the valance band maximum of a-SiO(In, Mo), which could be a passageway of carriers produced in the opto-electric conversion. The quantum transport mechanism from direct tunneling and defects level-assisted is put forwarded to explain the transport phenomenon in the novel PV device. furthermore, the matching of work function for both TCO and Si is fundamental in the asymmetric device.

关键词： Amorphous SiOx layer Density functional theory Charge transition levels Tunneling

Selective Area Epitaxy of InGaN/GaN Multiple Quantum Wells on GaN Micro-facets

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Selective Area Epitaxy of InGaN/GaN Multiple Quantum Wells o...

第十二届全国MOCVD学术会议

作者： G.f.Yang P.Chen Z.G.Yu B.Liu Z.L.Xie X.Q.Xiu Z.L.Wu f.xu Z.xu X.M.Hua P.Han Y.Shi R.Zhang Y.D.Zheng Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials and School of Electronic Science and Engineering Nanjing University Institute of Optoelectronics Nanjing University and Yangzhou

Selective area epitaxy has shown great success in the growth of InGaNN *** selective MOCVD,growth occurs in openings or "windows" produced in a dielectric mask such as SiO,SiN and bare sapphire when uniform GaN is grown and *** this work,Selective area epitaxy has been applied to grow GaN stripe templates with side facts, followed by InGaN/GaN multiple quantum well(MQW) *** oriented along [1120]form smooth triangular {1101} sidewall,while stripes in[1100]direction produce

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低摩擦轴向唇形油封的开发

汽车与新动力 2020年第5期3卷 42-44页

作者： [日]M.INOUE [日]Y.KASAI [日]f.xu [日]K.HAMAMOTO 高英英(译) 曹杰(译) 不详

减小曲轴油封的摩擦力矩可以提高轻型车辆发动机的燃油效率。轻型车辆发动机的曲轴一般采用弹簧径向氟橡胶唇形油封,但是公交车和卡车发动机的曲轴广泛采用轴向硅橡胶唇形油封。轴向机油油封的主唇负荷小、力矩小、可靠性高。在曲轴转动... 详细信息

减小曲轴油封的摩擦力矩可以提高轻型车辆发动机的燃油效率。轻型车辆发动机的曲轴一般采用弹簧径向氟橡胶唇形油封,但是公交车和卡车发动机的曲轴广泛采用轴向硅橡胶唇形油封。轴向机油油封的主唇负荷小、力矩小、可靠性高。在曲轴转动时,轴向唇形油封可持久地保证油封唇和抛油环之间不受污染,因此使用寿命长。将轴向唇形油封应用于轻型车辆发动机,可以实现发动机的低摩擦和高可靠性。在曲轴高速转动时,传统轴向油封的抛油环会有轻微的机油泄漏。为解决该问题,开发了能防止机油泄漏的新型抛油环。实际观察了机油泄漏情况并评估了油封唇对抛油环的跟随性。评估证实,在曲轴高速转动时,油封唇和抛油环之间的间隙相对较小。新开发的轴向唇形油封的摩擦力矩比传统的径向唇形油封小60%。该开发适用于轻型车辆发动机的轴向唇形油封,并具有低摩擦和高可靠性的特点。

关键词：摩擦力矩效率轴向唇形油封泄漏可靠性

支架特异性脂肪衰减指数与PCI术后靶血管血运重建相关

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国际医学放射学杂志 2024年第2期 251-252页

作者： f.xu C.C.Wang Q.Tao J.Zhang M.M.Zhao S.W.Shi 潘红利

摘要目的探讨支架特异性血管周围脂肪衰减指数（fAI）在支架植入病人中的临床相关性。方法回顾性纳入162例在支架植入后接受连续冠状动脉CT血管成像

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Combined Radiofrequency and Ethanol Ablation for HCC---Ex vivo experiment and clinical study

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Combined Radiofrequency and Ethanol Ablation for HCC---Ex vi...

2009年世界肿瘤介入学术大会

作者： Xiao Y.Xie~1,Ming Kuang~2,Ming D.Lu~2,Hui X.xu~1,Zuo f.xu~1,Xiao Y.Yin~2,Guang J.Liu~1,Jie f.Huang~2 from the Departments of Medical Ultrasonics(X.Y.X.,H.X.X.,G.J.L.,Z.f.X.)1 and Hepatobiliary Surgery(M.D.L., M.K.,X.Y.Y.J.fH.) 2,The first Affiliated Hospital,Sun Yat-Sen University,Guangzhou,People’s Republic of China.

Objective:Percutaneous ethanol injection(PEI) and radiofrequency(RfA) used to be standard alternative options to treat hepatocellular carcinoma(HCC).But the conventional PEI has limitations of achieving complete distributing in tumors bigger than 2cm and RfA is unsuitable for treatment of tumors at unfavorable *** incomplete ablation and local tumor progression are the main factors to limiting the longtime *** Multi-pronged needle percutaneous ethanol injection(MPEI) is help to achieving ethanol complete distributing in tumor up to 5cm,Then combination of MPEI+RfA may be more efficient in HCC treatment. Methods:Ex vivo experiment in pig liver:The efficacy of RfA,MPEI+RfA and MPEI+RfA+HS(Hypertonic saline) was ***(3-cm-electrode) was applied to porcine livers by using *** RfA,20ml of 99.5%ethanol was injected around the electrode in 3cm *** hypertonic saline was injected around the electronic *** compared the size,shape of ablation zone,treatment time,power,and impedance during ablation. Results:MPEI+RfA produced a larger zone of ablation than RfA alone(23.3+/-4.1cm vs 19.1+/-1.4cm,PfA+TNS produced a largest zone of ablation(46.8+/-3.5cm.PfA than in RfA only(PfA by using a multi-pronged injection needle and Cool-tip during a 2-year *** tumors located at unfavorable *** treatment sessions were ***: The complete response was achieved in 19 patients being 86.9%.The treatment failure was observed in tree patients(13.1%). The major complications occurred in two patients(8.7%).The 1 and 2 year disease-free survival(DfS) rate is 74%and 63%. Conclusions:Combined therapy of MPEI+RfA or MPEI+RfA+TNS can increase the volume of RfA-induced coagulation in the liver with a singl

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Aquaporin-4-IgG-seropositive neuromyelitis optica spectrum disorders:progress of experimental models based on disease pathogenesis

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Neural Regeneration Research 2025年第2期20卷 354-365页

作者： Li xu Huiming xu Changyong Tang Department of Neurology The Third Affiliated Hospital of Sun Yat-sen UniversityGuangzhouGuangdong ProvinceChina

Neuromyelitis optica spectrum disorders are neuroinflammatory demyelinating disorders that lead to permanent visual loss and motor *** date,no effective treatment exists as the exact causative mechanism remains ***,experimental models of neuromyelitis optica spectrum disorders are essential for exploring its pathogenesis and in screening for therapeutic *** most patients with neuromyelitis optica spectrum disorders are seropositive for IgG autoantibodies against aquaporin-4,which is highly expressed on the membrane of astrocyte endfeet,most current experimental models are based on aquaporin-4-IgG that initially targets *** experimental models have successfully simulated many pathological features of neuromyelitis optica spectrum disorders,such as aquaporin-4 loss,astrocytopathy,granulocyte and macrophage infiltration,complement activation,demyelination,and neuronal loss;however,they do not fully capture the pathological process of human neuromyelitis optica spectrum *** this review,we summarize the currently known pathogenic mechanisms and the development of associated experimental models in vitro,ex vivo,and in vivo for neuromyelitis optica spectrum disorders,suggest potential pathogenic mechanisms for further investigation,and provide guidance on experimental model *** addition,this review summarizes the latest information on pathologies and therapies for neuromyelitis optica spectrum disorders based on experimental models of aquaporin-4-IgG-seropositive neuromyelitis optica spectrum disorders,offering further therapeutic targets and a theoretical basis for clinical trials.

关键词： aquaporin-4 experimental model neuromyelitis optica spectrum disorder pathogenesis