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A Review of Variable-inductor-based Power Converters for Eco-friendly Applications:Fundamentals,Configurations,and Applications

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Chinese Journal of Electrical Engineering 2023年第3期9卷 50-71页

作者： Zijie He Guidong Zhang Zexiang Chen samson s.yu school of Automation Guangdong University of TechnologyGuangzhou 510000China school of Engineering Deakin UniversityMelbourne 3000Australia

Modern eco-friendly industries such as renewable energy systems,electric vehicles(EVs),and light-emitting diodes(LEDs)have led to technological advancements in power ***-based power converters have limited working ranges and can cause significant harmonics and oscillations in the output voltage and *** variable inductors can help solve this problem by changing the inductance without resorting to extreme switch duty *** their advantages,there is still a lack of comprehensive reviews of variable inductor applications in power converter design.A thorough and in-depth review of variable inductance control in power conversion is presented,including its significance,working principle,core structure,modeling method,and typical ***,an inductor works in its linear magnetic region;its inductance in a power converter is considered constant,and the converter operates under fixed working ***,a broad range of working conditions is required for power converters in practical *** is typically realized by changing the duty cycles of the *** working principle of variable inductance is reviewed,and the application of variable inductance control in power converters is presented,which will further help power electronics researchers and engineers design flexible and resilient power converters.

关键词： Variable inductors magnetic saturation magnetically controlled inductors power converter

Overlapping community detection combining content and link

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Journal of Zhejiang University-science C(Computers and Electronics) 2012年第11期13卷 828-839页

作者： Zhou-zhou HE Zhong-fei(Mark)ZHANG Philip s.yu Zhejiang Provincial Key Laboratory of Information Network Technology Department of Information Science and Electronic EngineeringZhejiang UniversityHangzhou 310027China Department of Computer science University of Illinois at ChicagoIL 60607USA

In classic community detection, it is assumed that communities are exclusive, in the sense of either soft clustering or hard clustering. It has come to attention in the recent literature that many real-world problems violate this assumption, and thus overlapping community detection has become a hot research topic. The existing work on this topic uses either content or link information, but not both of them. In this paper, we deal with the issue of overlapping community detection by combining content and link information. We develop an effective solution called subgraph overlapping clustering (sOC) and evaluate this new approach in comparison with several peer methods in the literature that use either content or link information. The evaluations demonstrate the effectiveness and promise of sOC in dealing with large scale real datasets.

关键词： Overlapping Content Link Community detection

A Review of Isolated Bidirectional DC-DC Converters for Data Centers

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Chinese Journal of Electrical Engineering 2023年第4期9卷 1-22页

作者： shuohang Chen Guidong Zhang samson s.yu Yi Mei yun Zhang school of Automation Guangdong University of TechnologyGuangzhou 510600China school of Engineering Deakin UniversityMelbourne 3125Australia Global Data services Holdings Ltd. Guangzhou 510600China

In today’s fast-paced,information-driven world,data centers can offer high-speed,intricate capabilities on a larger scale owing to the ever-growing demand for networks and information *** data centers process and transmit information,stability and reliability are *** center power supply architectures rely heavily on isolated bidirectional DC-DC converters to ensure safety and *** the smooth operation of a data center,the power supply must be reliable and *** this study,we summarize the basic principle,topology,switch conversion strategy,and control technology of the existing isolated bidirectional DC-DC ***,existing research results and problems with isolated bidirectional DC-DC converters are ***,future trends in the development of isolated bidirectional DC-DC converters for data centers are presented,which offer valuable insights for solving engineering obstacles and future research directions in the field.

关键词： Data centers isolated bidirectional DC-DC converters power electronics topology control strategy

Effect of Icosahedral Phase on Crystallographic Texture and Mechanical Anisotropy of Mg–4%Li Based Alloys

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Journal of Materials science & Technology 2017年第5期33卷 475-480页

作者： C.Q.Li D.K.Xu s.yu L.Y.sheng E.H.Han school of Materials science and Engineering Northeastern University CAs Key Laboratory of Nuclear Materials and safety Assessment Institute of Metal Research Chinese Academy of Sciences school of Materials science and Engineering Shenyang Aerospace University shenzhen Institute Peking University Shenzhen Key Lab Human Tissue Regenerate & Repair

Through investigating and comparing the microstructure and mechanical properties of the as-extruded Mg alloys Mg-4%Li and Mg-4%Li-6%Zn-l.2%Y （in wt%）, it demonstrates that although the formation of I-phase （Mg3Zn6Y, icosahedral structure） could weaken the crystallographic texture and improve the me- chanical strength, the mechanical anisotropy in terms of strength remains in Mg-4%Li-6%Zn-1.2%Y alloy. Failure analysis indicates that for the Mg-4%Li alloy, the fracture surfaces of the tensile samples tested along transverse direction （TD） contain a large number of plastic dimples, whereas the fracture surface exhibits quasi-cleavage characteristic when tensile samples were tested along extrusion direction （ED）. For the Mg-4%Li-6%Zn-I.2%Y alloy, typical ductile fracture surfaces can be observed in both ＂TD＂ and ＂ED＂ samples. Moreover, due to the zonal distribution of broken l-phase particles, the fracture surface of ＂TD＂ samples is characterized by the typical ＂woody fracture＂.

关键词： Mg-Li alloy Texture Mechanical anisotropy Fracture

Protect You More Than Blank: Anti-Learning sensitive User Information in the social Networks

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Journal of Computer science & Technology 2014年第5期29卷 762-776页

作者：袁明轩陈雷 Philip s. yu 梅宏 Department of Computer science and Engineering The Hong Kong University of Science and Technology Huawei Noah's Ark Laboratory Department of Computer science University of Illinois at ChicagoChicago IL 60637 U.S.A. FellowACMIEEE Key Laboratory of High Confidence software Technologies Ministry of Education Institute of software School of Electronics Engineering and Computer Science Peking University Department of Computer science and Engineering Shanghai Jiao Tong University

social networks are getting more and more attention in recent years. People join social networks to share their information with others. However, due to the different cultures and backgrounds, people have different requirements on what kind of information should be published. Currently, when social network websites publish data, they just leave the information that a user feels sensitive blank. This is not enough due to the existence of the label-structure relationship. A group of analyzing algorithms can be used to learn the blank information with high accuracy. In this paper, we propose a personalized model to protect private information in social networks. specifically, we break the label-structure association by slightly changing the edges in some users＇ neighborhoods. More importantly, in order to increase the usability of the published graph, we also preserve the influence value of each user during the privacy protection. We verify the effectiveness of our methods through extensive experiments. The results show that the proposed methods can protect sensitive labels against learning algorithms and at the same time, preserve certain graph utilities.

关键词： social network privacy protection

study of laser beam scattering by inhomogeneous ensemble of red blood cells in a shear flow

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Journal of Innovative Optical Health sciences 2015年第4期8卷 85-96页

作者： s.yu Nikitin A.E.Lugovtsov V.D.Ustinov M.D.Lin A.V.Priezzhev Physics Faculty Lomonosov Moscow state University Moscow Russia International Laser Center Lomonosov Moscow state University MoscowRussia Faculty of Computational Mathematics and Cybernetics Lomonosov Moscow state University Moscow Russia Faculty of Fundamental Medicine Lomonosov Moscow state University Moscow Russia

Laser elktacytometry is a technique widely used for measuring the deformability of red blood cells(erythrocytes)in blood samples in *** ektacytometer,a flow of highly diluted suspension of erythrocytes in variable shear stress conditions is iluninated with a laser beam to obtain a diffraction *** diffraction pattern provides information about the shapes(shear induced elongations)of the cells under *** paper is dedicated to developing the technique of laser ektacytometry s0 that it would enable one to measure the distrilbution of the erythrocytes in *** discuss the problem of calibration of laser elktacytometer and test a novel data processing algorithm allowing to determine the parameters of the distribution of ery-throcytes ***,we examined 12 specimens of blood of rats under the action of 4 shear *** of the data shows that in conditions of a limited range of digitizing the diffraction patterns,the measurement errors for the mean deformability,deform-ability scatter and the skewness of erythrocytes distribution in deformability by our method are respectively 15%,20%and 20%.

关键词： Laser ifractometry ektacytometry shear flow difraction pattern deformability of erythrocytes erythrocytes variance in shapes image analysis

Laser additive manufacturing of strong and ductile Al-12si alloy under static magnetic field

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Journal of Materials science & Technology 2023年第32期163卷 101-112页

作者： R.Wang J.Wang L.M.Lei s.yu T.Hu s.s.shuai s.Z.Xu Z.H.Cao X.P.Li C.Y.Chen Z.M.Ren state Key Laboratory of Advanced special steels School of Materials Science and EngineeringShanghai UniversityShanghai 200444China AECC Commercial Aircraft Engine Co. Ltd.Shanghai 201108China school of Mechanical and Manufacturing Engineering The University of New South Wales(UNSW Sydney)Sydney NSW 2052Australia

Rapid cooling and solidification during laser additive manufacturing(LAM)can produce ultra-fine microstructure with higher ***,the non-uniform cell/grain structure can easily result in early stress concentration and fracture during deformation,which remains a major challenge for the LAM *** Al-12si as the model alloy,we employed the external static magnetic field(sMF)to modulate the laser powder bed fusion process(L-PBF),demonstrating a uniform microstructure with a refined cell *** mechanical properties show that the sMF can produce a combination of high tensile strength of 451.4±0.5 MPa and large uniform elongation of 10.4%±0.79%,which are superior to those of previously-reported Al-si alloys with post-treatment or element *** mechanism analysis based on multi-scale simulation reveals the determining role of sMF in rapid solidification,and this method is applicable to the microstructure control of other metallic materials during LAM.

关键词： Laser powder bed fusion Magnetic field Al alloys Grain refinement strengthening mechanism

Congenital penile curvature: long-term results of operative treatment using the plication procedure

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Asian Journal of Andrology 2004年第3期6卷 273-276页

作者： s.-s.Lee E.Meng F.-P.Chuang C.-Y.Yen s.-Y.Chang D.-s.yu G.-H.sun Division of Urology Department of SurgeryTri-Service General HospitalNational Defense Medical CenterNationalDefense UniversityTaipeiChina

Aim: To determine the long-term outcome, effectiveness and patient satisfaction of congenital penile curvature correction by plication of tunica albuginea. Methods: From January 1992 to January 2002, 106 young patients underwent surgical correction of congenital penile curvature by corporeal plication. Indications for operation were difficult or impossible vaginal penetration and cosmetic problems. The technique of corporeal plication consists of placing longitudinal plication sutures of 2-zero braided polyester on the convex side of the curvature until the curvature is corrected when erection is artificially induced. Results of this procedure were obtained by retrospective chart reviews and questionnaires via mail. Long-term follow-up ranged from 11 to 132 (mean 69.3) months and data were available for 68 patients. Results: Penile straightening was excellent in 62 patients (91 %) and good with less than 15 degree of residual curvature in 6 patients (9 %). sixty-seven patients reported no change in erectile rigidity or maintenance postoperatively, while 1 described early detumescence. shortening of the penis without functional problems was noted by 26 patients (38 %). Thirty-Five patients (51 %) reported feeling palpable indurations (suture knots) on the penis. Temporary numbness of glans penis was described in 3 patients. Overall, 60 patients were very satisfied, 6 satisfied, 2 unsatisfied. Conclusion: Corporeal plication is an effective and durable procedure with a high rate of patient satisfaction.

关键词： penile curvature treatment plication procedure

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众筹项目的社交网络影响力预测与分析

西安交通大学学报 2017年第4期51卷 91-96页

作者：杨扬 Chun-Ta LU 王菲菲许进 Philip s.yu 北京大学信息科学技术学院北京100871 伊利诺伊大学芝加哥分校计算机系美国芝加哥60607 北京大学光华管理学院北京100871

针对众筹项目由于社会影响力不足而成功率较低的问题,提出了面向众筹平台的社交网络影响力预测方法。该方法基于众筹网站和社交网络的实时观测数据,分别提取累积和增量等多类别预测特征,并随着社会推广的进行而渐进地预测项目的社交网... 详细信息

针对众筹项目由于社会影响力不足而成功率较低的问题,提出了面向众筹平台的社交网络影响力预测方法。该方法基于众筹网站和社交网络的实时观测数据,分别提取累积和增量等多类别预测特征,并随着社会推广的进行而渐进地预测项目的社交网络影响力增益,最后采用带L1一范数约束惩罚的逻辑回归等方法进行预测特征分析。实验结果表明:在整个推广过程中,众筹项目的社交网络影响力可以被精确预测,准确率最高达88.31%;分类器在采用累积特征时具有比采用增量特征更好的预测效果;项目统计特征和推广者的社会影响力等特征具有更高的重要性和更稳定的显著性。该方法成功地解决了众筹项目的社会影响力预测问题,并为设计更好的社交网络推广策略提供了依据。

关键词：社交网络众筹项目社会影响力影响力预测