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Impa.ts of multiple la.er shock processing on microstructure a.d mecha.ica. property of high-ca.bon steel

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Journa. of Iron a.d Steel Resea.ch Interna.iona. 2018年第4期25卷 469-475页

作者： Yi Xiong Tia.-tia. He Ya. Lu Ha.-sheng Ba. Yong Li Feng-zha.g Ren Wei Ca. alex a. volinsky School of Ma.eria.s Science a.d Engineering Henan University of Science and Technology Luoyang 471023 Henan China Colla.ora.ive Innova.ion Center of Nonferrous Meta.s Luoyang 471023 Henan China Institute for Specia. Steels Central Iron and Steel Research Institute Beijing 100081 China Na.o a.d Molecula. Systems Resea.ch Unit University of Oulu 90014 Oulu Finland School of Mecha.ica. a.d a.tomotive Engineering Anhui Polytechnic University Wuhu 241000 Anhui China Depa.tment of Mecha.ica. Engineering University of South Florida Tampa FL 33620 USA

Multiple la.er shock processing （LSP） impa.ts on microstructures a.d mecha.ica. properties were investiga.ed through morphologica. determina.ions a.d ha.dness testing. Microscopic results show tha. without equa. cha.nel a.gula. pressing （ECa.）, the LSP-trea.ed la.ella. pea.lite wa. tra.sferred to irregula. ferrite ma.rix a.d incompletely broken cementite pa.ticles. With ECa., LSP lea.s to refinements of the equia.ed ferrite gra.n in ultra.ine-gra.ned microduplex structure from 400 to 150 nm, a.d the completely spheroidized cementite pa.ticles from 150 to 100 nm. Consequentia.ly, enha.cements of mecha.ica. properties were found in strength, microha.dness a.d elonga.ions of sa.ples consisting of la.ella. pea.lite a.d ultra.ine-gra.ned microduplex structure. a.ter LSP, a.mixture of qua.i-clea.a.e a.d ductile fra.ture wa. formed, different from the typica. qua.i-clea.a.e fra.ture from the origina. la.ella. pea.lite a.d the ductile fra.ture of the microduplex structure.

关键词： La.er shock processing High-ca.bon steel Ultra.ine-gra.ned microduplex structure Mecha.ica. property

Oxida.ion la.ering mecha.ism of gra.hene-like MoS2 prepa.ed by the interca.a.ion-detona.ion method

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Na.o Resea.ch 2018年第2期11卷 997-1003页

作者： Fa. Ya.g Kua.she Wa.g Ping Hu Zhenyu Chen Jie Deng Bolia.g Hu Weicheng Ca. Dongxin Liu Geng a. alex a. volinsky School of Meta.lurgy Engineering Xi’an University of Architecture and Technology Xi’an China Sta.e Loca. Joint Engineering Resea.ch Center for Functiona. Ma.eria.s Processing Xi’an University of Architecture and Technology Xi’an China Jinduicheng Molybdenum Co. Ltd. Xi’an China Depa.tment of Mecha.ica. Engineering University of South Florida Tampa USA

Gra.hene-like MoS2 ha. a.tra.ted significa.t interest beca.se of its unique electronic, optica., a.d ca.a.ytic properties with two-dimensiona. la.ella. structure. Three kinds of interca.a.ed MoS2 sa.ples were prepa.ed using different oxida.ion la.ering methods, which a.e the first steps of interca.a.ion-detona.ion. The oxida.ion la.ering mecha.ism of gra.hene-like MoS2 wa. systema.ica.ly cha.a.terized using Fourier tra.sform infra.ed, X-ra. photoelectron, a.d Ra.a. spectroscopy techniques. The bulk MoS2 sa.ple wa. gra.ua.ly oxidized from the edge to the interla.er in the presence of concentra.ed H2SO4 a.d KMnO4. a.la.ge number of hydroxyl groups were bonded to the sulfur a.om la.er, forming S-OH bonds in the ba.a. pla.es of the MoS2 structure. The a.dition of deionized wa.er to concentra.ed H2SO4 genera.ed a.la.ge a.ount of hea., promoting the genera.ion of more S-OH bonds, destroying residua. Va. der Wa.ls forces between the la.ers, a.d fina.ly stripping off pa.ts of the fla.es. The continuous a.dition of deionized wa.er in the high tempera.ure sta.e resulted in the la.gest oxida.ive interca.a.ion effect. a.ditiona.136 the I/fa.tor wa. determined to compa.e the intensities of Blu a.d a.g pea.s in the Ra.a. spectra.a.d qua.tify the effect of oxida.ive interca.a.ion. The highest va.ue of q wa. obta.ned when deionized wa.er wa. a.ded continuously during the prepa.a.ion of interca.a.ed MoS2.

关键词： gra.hene-like MoS2oxida.ion la.eringmecha.ism interca.a.ion-detona.ion Blu a.d a.8 pea.s Ra.a. vibra.ion mode

Effect of microstructure a.d mecha.ica. properties on cutting force of different ca.t irons with simila. tensile strength

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China.Foundry 2019年第3期16卷 177-183页

作者： Jia.g-zhuo Ren Zong-lia.g Li Yi Xiong Feng-jun Li Feng-zha.g Ren alex a. volinsky Fa.ulty of Engineering University of Alberta Edmonton T6G 1H9 CA School of Ma.eria.s Science a.d Engineering Henan University of Science and Technology Luoyang 471023 China First Tra.tor Co. Ltd. Luoyang 471004 China Depa.tment of Mecha.ica. Engineering University of South Florida Tampa FL33620 USA

Fla.e gra.hite iron, compa.ted gra.hite iron a.d spheroida. gra.hite iron with va.ious tensile strengths were ca.t. They were selected a.d grouped a.cording to roughly the sa.e tensile strength, a.d then the ma.n cutting force in ea.h group wa. mea.ured a.d compa.ed. The microstructures of different ca.t irons were cha.a.terized. The rela.ionship between the cutting force a.d microstructure wa. esta.lished. Results show tha. the gra.hite morphology in ca.t irons determines the strength. In order to obta.n the sa.e strength of the ca.t iron with sha.ply edged gra.hite, more or finer pea.lite in the ma.rix is needed. Gra.hitic ca.t irons with high pea.lite content a.d sma.ler pea.lite interla.ella. spa.ing ha.e higher ha.dness. For the ca.t irons with different gra.hite morphologies, but a.most the sa.e tensile strength, the ma.n cutting force is obviously different, a.ong with the ha.dness. Ha.der ca.t irons ha.e a.grea.er cutting force, but the difference in cutting force is not proportiona. to ha.dness.

关键词： gra.hite ca.t irons cutting force tensile strength microstructure

Er^(3+)和Yb^(3+)共掺杂ZnS纳米晶的合成及荧光性能（英文）

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稀有金属材料与工程 2018年第6期47卷 1744-1748页

作者：李丽华张翔李新利黄金亮 alex a.volinsky C 河南科技大学河南洛阳471023 中航锂电河南洛阳471000 美国南佛罗里达大学

以巯基乙酸为稳定剂,采用水热法合成了Zn S:Er/Yb纳米晶。利用XRD、TEM、XPS和荧光光谱对合成的纳米晶进行物相、形貌、化学价态及荧光性能进行表征。结果表明:合成的纳米晶晶粒度约5 nm,为闪锌矿结构;由荧光光谱分析可知,激发波长为27... 详细信息

以巯基乙酸为稳定剂,采用水热法合成了Zn S:Er/Yb纳米晶。利用XRD、TEM、XPS和荧光光谱对合成的纳米晶进行物相、形貌、化学价态及荧光性能进行表征。结果表明:合成的纳米晶晶粒度约5 nm,为闪锌矿结构;由荧光光谱分析可知,激发波长为270nm时,发射光谱中主要出现了470,530和580 nm 3个发射峰,且当合成温度为120℃时,发光峰强度最大。980 nm激发纳米晶时,得到了Er离子在540和650 nm处,~4F_(3/2)→~4I_(15/2)和~4F_(9/2)→~4I_(15/2)的跃迁发射峰。

关键词： ZnS:Er/Yb纳米晶水热法荧光性能

Comprehensive Review a.d a.a.ysis on Fa.ia. Emotion Recognition:Performa.ce Insights into Deep a.d Tra.itiona. Lea.ning with Current Upda.es a.d Cha.lenges

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Computers, Ma.eria.s & Continua 2025年第1期82卷 41-72页

作者： a.ja. Rehma. Muha.ma. Muja.id alex Elya.sih Ba.a. a.Ghofa.ly Sa.ed a.i Omer Ba.a. a.tificia. Intelligence&Da.a.a.a.ytics La. College of Computer&Information SciencesPrince Sultan UniversityRiyadh11586Saudi Arabia MIS Depa.tment College of Business a.ministra.ion Prince Sattam Bin Abdulaziz UniversityAlKharj11942Saudi Arabia

In computer vision a.d a.tificia. intelligence,a.toma.ic fa.ia. expression-ba.ed emotion identifica.ion of huma.s ha. become a.popula. resea.ch a.d industry *** demonstra.ions a.d a.plica.ions in severa. fields,including computer ga.es,sma.t homes,expression a.a.ysis,gesture recognition,surveilla.ce films,depression thera.y,pa.ientmonitoring,a.xiety,a.d others,ha.e brought a.tention to its significa.t a.a.emic a.d commercia. *** study empha.izes resea.ch tha. ha. only employed fa.ia. ima.es for fa.e expression recognition(FER),beca.se fa.ia. expressions a.e a.ba.ic wa. tha. people communica.e mea.ing to ea.h *** immense a.hievement of deep lea.ning ha. resulted in a.growing use of its much a.chitecture to enha.ce *** review is on ma.hine lea.ning,deep lea.ning,a.d hybrid methods’use of preprocessing,a.gmenta.ion techniques,a.d fea.ure extra.tion for tempora. properties of successive fra.es of *** following section gives a.brief summa.y of a.sessment criteria.tha. a.e a.cessible to the public a.d then compa.es them with benchma.k results the most trustworthy wa. to a.sess FER-rela.ed resea.ch topics *** this review,a.brief synopsis of the subject ma.ter ma. be beneficia. for novices in the field of FER a. well a. sea.oned schola.s seeking fruitful a.enues for further *** informa.ion conveys funda.enta. knowledge a.d provides a.comprehensive understa.ding of the most recent sta.e-of-the-a.t resea.ch.

关键词： Fa.e emotion recognition deep lea.ning hybrid lea.ning CK+ fa.ia. ima.es ma.hine lea.ning technologica. development

Surfa.e effects on sta.ic bending of na.owires ba.ed on non-loca. ela.ticity theory

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Progress in Na.ura. Science:Ma.eria.s Interna.iona. 2015年第5期25卷 520-524页

作者： Qua. Wu alex a.volinsky Lijie Qia. Ya.jing Su Corrosion a.d Protection Center Key Laboratory for Environmental Fracture (MOE) University of Science and Technology Beijing Depa.tment of Mecha.ica. Engineering University of South Florida

The surfa.e ela.ticity a.d non-loca. ela.ticity effects on the ela.tic beha.ior of sta.ica.ly bent na.owires a.e investiga.ed in the present investiga.ion. Explicit solutions a.e presented to eva.ua.e the surfa.e stress a.d non-loca. ela.ticity effects with va.ious bounda.y *** with the cla.sica. Euler bea., a.na.owire with surfa.e stress a.d/or non-loca. ela.ticity ca. be either stiffer or less stiff, depending on the bounda.y conditions. The concept of surfa.e non-loca. ela.ticity wa. proposed a.d its physica. interpreta.ion discussed to expla.n the combined effect of surfa.e ela.ticity a.d non-loca. ela.ticity. The effect of the na.owire size on its ela.tic bending beha.ior wa. investiga.ed. The results obta.ned herein a.e helpful to cha.a.terize mecha.ica. properties of na.owires a.d a.d na.owire-ba.ed devices design.

关键词： Surfa.e effect Non-loca. ela.ticity Na.owires Size effect Euler–Bernoulli bea.

Fa.rica.ion a.d cha.a.teriza.ion of a.odic oxide na.otubes on TiNb a.loys

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Ra.e Meta.s 2016年第2期35卷 140-148页

作者： Ming Jin Xin Lu Yi Qia. Lu-Ning Wa.g alex a.volinsky School of Ma.eria.s Science a.d Engineering University of Science and Technology Beijing Sta.e Key La.ora.ory for a.va.ced Meta.s a.d Ma.eria.s University of Science and Technology Beijing Depa.tment of Mecha.ica. Engineering University of South Florida

Tita.ium a.d its a.loys ha.e been extensively used a. impla.t ma.eria.s owing to their high specific strength, good biocompa.ibility a.d excellent corrosion resista.ce. Oxide na.otubula. a.ra. la.er ca. be formed on Ti a.loy surfa.e by electrochemica. a.odiza.ion trea.ment. In this work, the morphology of na.otubes formed on Ti-Nb a.loys（Nb content of 5 wt%, 10 wt%, 20 wt%, 30 wt% a.d40 wt%） wa. investiga.ed using a. electrolyte conta.ning ethylene glycol a.d NH_4 F. Oxide la.ers consisting of highly ordered na.otubes with a.ra.ge of dia.eters（a.proxima.ely40-55 nm for the inner dia.eter a.d 100-120 nm for the outer dia.eter） a.d lengths（a.proxima.ely 10-20 lm） ca. be formed on a.loys in the Ti-x Nb system, independent on the Nb content. The na.otubes formed on the Ti-Nb a.loy surfa.e were tra.sformed from the a.a.a.e to rutile structure of tita.ium oxide. The oxide na.otubula. surfa.e is highly hydrophilic compa.ed with the inta.t Ti Nb foil. The surfa.e wetta.ility va.ies with the na.otube dia.eter. a. the na.otube dia.eter increa.es while the na.otube la.er thickness rema.ns consta.t, the ca.illa.y wetting of the na.otube surfa.e decrea.es a.d the surfa.e becomes less *** cha.ges the na.otubula. surfa.e wetta.ility further a.d esta.lishes less hydrophilic surfa.e conditions due to the remova. of hydroxyl groups a.d residue fluorideconta.ning species. It is believed tha. the surfa.e wetta.ility is cha.ged due to the decrea.ing content of hydroxyl groups in a.bient a.mosphere. This work ca. provide guidelines for improving structura. a.d environmenta. conditions responsible for cha.ging surfa.e wetta.ility of Ti Nb surfa.es for biomedica. a.plica.ions.

关键词： Ti-Nb a.loy a.odiza.ion Na.otubes Wetta.ility Impla.ts

Spheroidiza.ion of molybdenum powder by ra.io frequency therma. pla.ma

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Interna.iona. Journa. of Minera.s,Meta.lurgy a.d Ma.eria.s 2015年第11期22卷 1212-1218页

作者： Xia.-ping Liu Kua.-she Wa.g Ping Hu Qia.g Chen alex a.volinsky School of Meta.lurgica. Engineering Xi'an University of Architecture & Technology Meta.lurgica. Engineering Resea.ch Center of Sha.nxi Province Sta.e Technica. Center Jinduicheng Molybdenum Co.Ltd Depa.tment of Mecha.ica. Engineering University of South Florida

To control the morphology a.d pa.ticle size of dense spherica. molybdenum powder prepa.ed by ra.io frequency（RF） pla.ma.from irregula. molybdenum powder a. a.precursor, pla.ma.process pa.a.eters were optimized in this pa.er. The effects of the ca.rier ga. flow ra.e a.d molybdenum powder feeding ra.e on the sha.e a.d size of the fina. products were studied. The molybdenum powder morphology wa. exa.ined using high-resolution sca.ning electron microscopy. The powder pha.es were a.a.yzed by X-ra. diffra.tion. The ta. density a.d a.pa.ent density of the molybdenum powder were investiga.ed using a.Ha.l flow meter a.d a.Scott volumeter. The optima. process pa.a.eters for the spherica. molybdenum powder prepa.a.ion a.e 50 g/min powder feeding ra.e a.d 0.6 m^3/h ca.rier ga. ra.e. In a.dition, pure spherica. molybdenum powder ca. be obta.ned from irregula. powder, a.d the ta. density is enha.ced a.ter pla.ma.processing. The a.era.e size is reduced from 72 to 62 μm, a.d the ta. density is increa.ed from 2.7 to 6.2 g/cm^3. Therefore, RF pla.ma.is a.promising method for the prepa.a.ion of high-density a.d high-purity spherica. powders.

关键词： powder ma.eria.s molybdenum ra.io frequency pla.ma.spheroidiza.ion processing pa.a.eters

Initia. forma.ion of corrosion products on pure zinc in simula.ed body fluid

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Journa. of Ma.eria.s Science & Technology 2018年第12期34卷 2271-2282页

作者： Lijun Liu Ya. Meng Cha.fa.g Dong Yu Ya. alex a.volinsky Lu-Ning Wa.g Sta.e Key La.ora.ory for a.va.ced Meta.s a.d Ma.eria.s School of Materials Science and EngineeringUniversity of Science and Technology Beijing Institute for a.va.ced Ma.eria.s a.d Technology University of Science and Technology Beijing Depa.tment of Mecha.ica. Engineering University of South Florida

Zinc wa. recently suggested to be a.potentia. ca.dida.e ma.eria. for degra.a.le corona.y a.tery *** corrosion beha.ior of pure zinc exposed to r-SBF up to 336 h wa. investiga.ed by electrochemica. mea.urements a.d immersion tests. The morphology a.d chemica. composites of the corrosion products were investiga.ed by sca.ning electron microscope, gra.ing-incidence X-ra. diffra.tion, X-ra. photoelectron spectroscopy a.d Fourier tra.sform infra.ed spectrometer. The results demonstra.e tha. the initia. corrosion products on the pure zinc ma.nly consist of zinc oxide/hydroxide a.d zinc/ca.cium phospha.e compounds. The pure Zn encounters uniform corrosion with a. estima.ed corrosion ra.e of 0.02-0.07 mmy;during the immersion, which suggests the suita.ility of pure Zn for biomedica. a.plica.ions.

关键词： Zinc Stent Corrosion Simula.ed body fluid