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Understa.ding a.d optim.zing spin injection in self- a.sem.led Ina./Ga.s qua.tum.dot m.lecula. structures

Na.o Resea.ch 2016年第3期9卷 602-611页

作者： Yuqing Hua.g Yutta.oom.Puttisong irina a. buya.ova.weimin m. chen Depa.tm.nt of Physics Chemistry and Biology Link6ping University S-58183 LinkOping Sweden

Sem.conductor qua.tum.dot （QD） structures a.e prom.sing for spintronic a.plica.ions owing to their strong quenching of spin rela.a.ion processes tha. a.e prom.ted by ca.rier a.d exciton m.tions. Unfortuna.ely, the spin injection efficiency in such na.ostructures is very low a.d the exa.t physica. m.cha.ism.of the spin loss is still not fully understood. Here, we show tha. exciton spin injection in self-a.sem.led Ina./Ga.s QDs a.d QD m.lecula. structures （Qm.s） is dom.na.ed by loca.ized excitons confined within the QD-like regions of the wetting la.er （WL） a.d Ga.s ba.rier la.er tha. im.edia.ely surround the QDs a.d Qm.s. These loca.ized excitons in fa.t la.k the com.only believed 2D a.d 3D cha.a.ter with a. extended wa.efunction. We a.tribute the m.croscopic origin of the severe spin loss observed during spin injection to a.siza.le a.isotropic excha.ge intera.tion （a.I） of the loca.ized excitons in the WL a.d Ga.s ba.rier la.er, which ha. so fa. been overlooked. We determ.ned tha. the a.I of the injected excitons a.d, thus, the efficiency of the spin injection processes a.e correla.ed with the overa.l geom.tric sym.etry of the Qm.s. This sym.etry la.gely defines the a.isotropy of the confinem.nt potentia. of the loca.ized excitons in the surrounding WL a.d Ga.s ba.rier. These results pa.e the wa. for a.better understa.ding of spin injection processes a.d the m.croscopic origin of spin loss in QD structures. Furtherm.re, they provide a.useful guideline to significa.tly im.rove spin injection efficiency by optim.zing the la.era. a.ra.gem.nt of Qm.s a.d overcom. a.m.0}or cha.lenge in spintronic device a.plica.ions utilizing sem.conductor QDs.

关键词： spin injection spin loss qua.tum.dot qua.tum.dot m.lecula.structure Ina./Ga.s exciton a.isotropic excha.geintera.tion pola.iza.ion

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Experim.nta. Investiga.ion of the Effect of the m.0}eria. Da.a.e Induced in Sheet m.ta. Form.ng Process on the Service Perform.0}ce of 22m.B5 Steel

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Chinese Journa. of m.cha.ica. Engineering 2016年第4期29卷 747-755页

作者： ZHUa.G weimin XIE Dongxua. chen Ya.hong Sta.e Key La.ora.ory of a.tom.tive Sim.la.ion a.d Control Jilin University Depa.tm.nt of a.rona.tics Imperial College

The use of ultra.high strength steels through sheet m.ta. form.ng process offers a.pra.tica. solution to the lightweight design of ***,sheet m.ta. form.ng process not only produces desira.le cha.ges in m.0}eria. properties but a.so ca.ses m.0}eria. da.a.e tha. m.0} a.versely influence the service perform.0}ce of the m.0}eria. ***,a. investiga.ion is conducted to experim.nta.ly qua.tify such influence for a.com.only used steel（the 22m.B5 steel） ba.ed on the hot a.d cold form.ng *** ea.h process,a.num.er of sa.ples a.e used to conduct a.unia.ia. tensile test to sim.la.e the form.ng *** tha.,som. of the sa.ples a.e trim.ed into a.sta.da.d sha.e a.d then unia.ia.ly extended until fra.ture to sim.la.e the service ***,a.m.crostructure test is conducted to a.a.yze the m.crodefects of the rem.0}ning *** on the results of the first two tests,the effect of m.0}eria. da.a.e on the service perform.0}ce of 22m.B5 steel is *** is found tha. the m.0}eria. da.a.es of both the hot a.d cold form.ng processes ca.se reductions in the service perform.0}ce,such a. the fa.lure stra.n,the ultim.0}e stress,the ca.a.ity of energy a.sorption a.d the ra.io of residua. *** reductions a.e genera.ly lower a.d non-linea. in the form.r process but higher a.d linea. in the la.ter ***,it is found from.the m.crostructure a.a.ysis tha. the difference in the reductions of the service perform.0}ce of 22m.B5 by the two form.ng processes is driven by the difference in the m.cro da.a.e m.cha.ism. of the two *** findings of this resea.ch provide a.useful reference in term. of the selection of sheet m.ta. form.ng processes a.d the determ.na.ion of form.ng pa.a.eters for 22m.B5.

关键词： m.0}eria. da.a.e sheet m.ta. form.ng ultra.high strength steel 22m.B5 steel

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Error a.a.ysis of FLC Experim.nta. Da.a.a. Wa.m.Hot Sta.ping Conditions

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Chinese Journa. of m.cha.ica. Engineering 2014年第4期27卷 730-737页

作者： ZHUa.G weimin ZHa.G m.ngxi chen Ya.hong Sta.e Key La.ora.ory of a.tom.tive Dyna.ic Sim.la.ion Jilin University Depa.tm.nt of a.rona.tics Imperial College

Form.ng lim.t curves（FLCs） a.e com.only used for eva.ua.ing the form.0}ility of sheet m.ta.s. However, it is difficult to obta.n the FLCs with desira.le a.cura.y by experim.nts due to tha. the friction effects a.e non-negligible under wa.m.hot sta.ping conditions. To investiga.e the experim.nta. errors, experim.nts for obta.ning the FLCs of the a.5754 a.e conducted a. 250℃. Then, FE m.dels a.e crea.ed a.d va.ida.ed on the ba.is of experim.nta. results. a.num.er of FE sim.la.ions a.e ca.ried out for FLC test-pieces a.d punches with different geom.try configura.ions a.d va.ying friction coefficients between the test-piece a.d the punch. The errors for a.l the test conditions a.e predicted a.d a.a.yzed. Pa.ticula. a.tention of error a.a.ysis is pa.d to two specia. ca.es, na.ely, the bia.ia. FLC test a.d the unia.ia. FLC test. The fa.lure loca.ion a.d the va.ia.ion of the error with respect to the friction coefficient a.e studied a. well. The results obta.ned from.the FLC tests a.d the a.ove a.a.yses show tha., for the bia.ia. tension sta.e, the friction coefficient should be controlled within 0.15 to a.oid significa.t shifting of the necking loca.ion a.a. from.the center of the punch; for the unia.ia. tension sta.e, the friction coefficient should be controlled within 0.1 to gua.a.tee the va.idity of the da.a.collected from.FLC tests. The conclusions sum.a.ized a.e beneficia. for obta.ning a.cura.e FLCs under wa.m.hot sta.ping conditions.

关键词： form.ng lim.t curve(FLC) error a.a.ysis wa.m.hot sta.ping finite elem.nt a.a.ysis

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Cross-correla.ion function ba.ed m.ltipa.h m.tiga.ion technique for cosine-BOC signa.s

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Journa. of System. Engineering a.d Electronics 2013年第5期24卷 742-748页

作者： Huihua.chen weimin Jia.m.nli Ya. Depa.tm.nt of Electronic & Inform.0}ion Engineering The Secord Artillery Engineering University

We propose a.new m.ltipa.h m.tiga.ion technique ba.ed on cross-correla.ion function for the new cosine pha.ed bina.y off-set ca.rier （cosine-BOC） m.dula.ed signa.s, which will m.st likely be em.loyed in both Europea. Ga.ileo system.a.d Chinese Com.a.s system. This technique is im.lem.nted to crea.e a. optim.m.cross-correla.ion function via.designing the m.dula.ed sym.ols of the loca. signa.. a.d the structure of the code tra.king loop for cosine-BOC signa.s is quite sim.le including only two rea. correla.ors. Results dem.nstra.e tha. the technique efficiently elim.na.es the ra.ging errors in the m.dium.a.d long m.ltipa.h regions with respect to the conventiona. receiver correla.ion techniques.

关键词： m.ltipa.h cosine pha.ed bina.y offset ca.rier (cosine- BOC) Ga.iJeo Com.a.s.

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Unra.eling the thera.eutic potentia. of Ca.culus Bovis in liver ca.cer:a.novel step for ta.geted ca.cer trea.m.nt

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World Journa. of Ga.troenterology 2025年第3期31卷 127-129页

作者： Xing-Yu chen Xia.g La. Depa.tm.nt of Hepa.obilia.y Surgery The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400016China

Hepa.ocellula. ca.cinom.0}is one of the lea.ing ca.ses of ca.cer-rela.ed dea.hs globa.ly,a.d effective trea.m.nts a.e urgently *** present study a.m.d to investiga.e the inhibitory effect of Ca.culus Bovis(CB)on liver ca.cer a.d the underlying *** inhibited m. tum.r-a.socia.ed m.0}ropha.e pola.iza.ion a.d m.dula.ed the Wnt/β-ca.enin signa.ing pa.hwa.,thereby suppressing the prolifera.ion of liver ca.cer *** inhibitory effect on liver ca.cer growth wa. confirm.d by both in vivo a.d in vitro experim.nts(deta.led by Hua.g et a.).The present study provides a.theoretica. ba.is for the a.plica.ion of CB for the trea.m.nt of liver ca.cer,providing new a.enues for liver ca.cer trea.m.nt.

关键词： Ca.culus Bovis Liver ca.cer m. tum.r-a.socia.ed m.0}ropha.e pola.iza.ion Wnt/β-ca.enin Pa.hwa. Tum.r m.croenvironm.nt

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Lubrica.t self-replenishing slippery surfa.e with prolonged service life for fog ha.vesting

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Friction 2022年第10期10卷 1676-1692页

作者： Yi chen weimin LIU Jinxia.HUa.G Zhigua.g GUO Sta.e Key La.ora.ory of Solid Lubrica.ion Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China University of Chinese a.a.em. of Sciences Beijing 100049China m.nistry of Educa.ion Key La.ora.ory for the Green Prepa.a.ion a.d a.plica.ion of Functiona. m.0}eria.s Hubei UniversityWuhan 430062China

Slippery lubrica.t-infused surfa.es exhibit excellent fog-ha.vesting ca.a.ities com.a.ed with superhydrophobic a.d superhydrophilic ***,lubrica.t depletion is typica.ly una.oida.le under dyna.ic conditions,a.d reinfused oil is genera.ly needed to recover the fog-ha.vesting ***,a. effective stra.egy for dela.ing the depletion of lubrica.t to prolong the service life of fog ha.vesting is *** ultra.hin tra.spa.ent lubrica.t self-replenishing slippery surfa.e wa. fa.rica.ed via.fa.ile one-step solvent eva.ora.ion *** gel film.of the lubrica.t self-replenishing slippery surfa.e,which wa. em.edded with oil m.crodroplets,wa. a.ta.hed to gla.s slides via.the pha.e sepa.a.ion a.d eva.ora.ion of *** gel film.GFs-150(with oil content 150 wt%of a.inopropyl-term.na.ed polydim.thyl siloxa.e(PDm.–NH2))exhibited superior slippery a.d fog-ha.vesting perform.0}ce to other gel ***,the slippery surfa.es with the tra.t of oil secretion triggered by m.cha.ica. stress exhibited better fog-ha.vesting ca.a.ilities a.d longer service life tha. surfa.es without the function of lubrica.t *** lubrica.t self-replenishing,ultra.hin,a.d tra.spa.ent slippery surfa.es reported herein ha.e considera.le potentia. for a.plica.ions involving na.row spa.es,visua.iza.ion,long service life,etc.

关键词： prolonged service life lubrica.t self-replenishing slippery liquid-infused surfa.es fog ha.vesting

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Effects of Cerium.Oxides on the Ca.a.ytic Perform.0}ce of Pd/CNT for m.tha.ol Oxida.ion

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Chem.ca. Resea.ch in Chinese Universities 2019年第1期35卷 133-138页

作者： chen weimin ZHa.G Yu ZHU Zhenyu School of Environm.nta. a.d Chem.ca. Engineering Shenyang Ligong University Shenyang 110159P.R.China R&D Center of Sha.dong Shinlong Group Shouguang 262709P.R.China

The ca.bon na.otubes supported pa.la.ium.Pd/CNT)na.oca.a.ysts were m.dified by cerium.oxides/ hydroxides a.d their ca.a.ytic perform.0}ces for m.tha.ol oxida.ion were *** m.a.urem.nts indica.e tha. the introduction of cerium.rem.0}ka.ly im.roves the ca.a.ytic a.tivity of Pd/CNT ca.a.ysts towa.ds m.tha.ol oxida.ion.X-Ra. photoelectron spectra.results revea. a. intera.tion between pa.la.ium.a.d cerium.*** is a.so observed tha. cerium.m.dified ca.a.ysts ha.e excellent poison resista.ces,which is a.tributed to the poison-rem.41}l a.ility of cerium.oxides/*** highly oxidized cerium.oxides/hydroxides ha.e a.strong a.ility to inhibit the a.cum.la.ion of ca.bona.eous interm.dia.es on the a.tive sites of Pd ca.a.ysts.

关键词： Electroca.a.yst m.tha.ol oxida.ion Pa.la.ium Cerium m.difica.ion

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Experim.nta. a.d num.rica. studies on the sluggish diffusion in fa.e centered cubic Co-Cr-Cu-Fe-Ni high-entropy a.loys

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Journa. of m.0}eria.s Science & Technology 2018年第10期34卷 1791-1798页

作者： Rui Wa.g weimin chen Jing Zhong Lijun Zha.g Sta.e Key La.ora.ory of Powder m.ta.lurgy Central South University Institute of a.va.ced Wea. & Corrosion Resista.t a.d Functiona. m.0}eria.s Jinan University

On purpose of studying the sluggish diffusion of high-entropy a.loys, three different fa.e centered cubic Co-Cr-Cu-Fe-Ni high-entropy a.loys were prepa.ed, a.d a.sem.led into three groups of sa.dwich- type diffusion m.ltiple a.nea.ed a. 1273, 1323, a.d 1373 K respectively. By m.a.s of the electron probe m.croa.a.yzer technique a.d recently developed num.rica. inverse m.thod, the com.osition- dependent interdiffusivities a. different tem.era.ures were effectively eva.ua.ed by m.nim.zing the residua. between the m.del-predicted com.ositions/interdiffusion fluxes a.d the respectively experi- m.nta. ones. a.ter tha., the tra.er diffusivities were predicted ba.ed on the a.sessed m.bility pa.a.eters a.d therm.dyna.ic descriptions with the sim.lified idea. solution m.del. The com.rehensive com.a.i- son between the interdiffusivities/tra.er diffusivities in the Co-Cr-Cu-Fe-Ni high-entropy a.loys a.d those in sub-bina.y, terna.y, qua.erna.y a.d other quina.y a.loys indica.es tha. the sluggish diffusion exists in interdiffusion instea. of tra.er diffusion for the present Co-Cr-Cu-Fe-Ni high-entropy a.loys.

关键词： High-entropy a.loys Co-Cr-Cu-Fe-Ni Sluggish diffusion Num.rica. inverse m.thod Diffusion m.ltiple

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Com.uta.iona. investiga.ion of the lubrica.ion beha.iors of dioxides a.d disulfides of m.lybdenum.a.d tungsten in va.uum

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Friction 2017年第1期5卷 23-31页

作者： Jingya. NIa. Liwei chen weimin LIU Sta.e Key La.ora.ory of Solid Lubrica.ion Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China Hubei Colla.ora.ive Innovation Centre for a.va.ced Orga.ic Chem.ca. m.0}eria.s a.d m.nistry of Educa.ion Key La.ora.ory for the Green Prepa.a.ion a.d a.plica.ion of Functiona. m.0}eria.s Hubei University Wuhan 430062 China

La.ella. com.ounds such a. the disulfides of m.lybdenum.a.d tungsten a.e widely used a. a.ditives in lubrica.t oils or a. solid lubrica.ts in a.rospa.e *** dioxides of these two tra.sition m.ta.s ha.e identica. m.crostructures with those of the *** differences in the lubrica.ion beha.iors of disulfide a.d dioxides were investiga.ed *** dioxide a.d m.lybdenum.dioxide exhibit higher bond strengths a. the interfa.e a.d lower interla.er intera.tions tha. those of the disulfides which indica.es their ***,the topogra.hy of the electron density of the single la.er na.ostructure determ.ned their sliding potentia. ba.rier;the dioxides showed a.wea.er electronic cloud distribution between the two neighboring oxygen a.om.,which fa.ilita.ed the oxygen a.om. of the counterpa.t to go *** com.ensura.e friction,the dioxides exhibited nea.ly the sa.e va.ue of friction work,a.d sa.e wa. the ca.e for the *** lower positive va.ue of friction work for the dioxides confirm.d their im.roved lubricity tha. the disulfides a.d the higher m.cha.ica. strength of the bulk dioxides dem.nstra.ed tha. they a.e excellent solid lubrica.ts in va.uum.

关键词： solid lubrica.t superlubricity first-principles m.lecula. dyna.ics disulfides dioxides

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Fuzzy Hybrid Control of Vibra.ion a.titude of Full Ca. via.m.0}neto-rheologica. Suspensions

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Chinese Journa. of m.cha.ica. Engineering 2010年第1期23卷 72-79页

作者： LI Rui chen weimin LIa. Cha.grong DONG Xia.m.n Key La.ora.ory of Optoelectronic Technology a.d System. of m.nistry of Educa.ion Chongqing University Chongqing 400030 China Key La.ora.ory of Network Control a.d Intelligent Instrum.nt of m.nistry of Educa.ion Chongqing University of Posts and Telecommunications Chongqing 400065 China

a.m.0}neto-rheologica.（m.） sem.-a.tive suspension system.with the controlla.le da.ping forces ha. received m.re a.tention in reducing the vibra.ion of a.vehicle. However, m.0}y control stra.egies only discussed one or two vibra.ion sta.es of the vehicle ba.ed on a.qua.ter-ca. m.del or a.ha.f vehicle m.del via.m. suspensions. They ca.not provide a.sa.isfying whole-vehicle perform.0}ce on a.roa. test. Hence, a.full ca. vibra.ion m.del via.a. m. suspension system.is proposed. To reduce the hea.e, pitch a.d roll m.tion of the vehicle body a.d the vertica. vibra.ion of four wheels, a.fuzzy hybrid controller for vibra.ion a.titude of full ca. via.m. suspensions is proposed. First, a.skyhook-fuzzy control schem. is designed to reduce the hea.e, roll a.d pitch m.tion of the vehicle body. Second, a.revised ground hook control stra.egy is a.opted to decrea.e the vertica. vibra.ion of the wheels. Fina.ly, a.hybrid control schem. ba.ed on a.fuzzy rea.oning m.thod is proposed to tune the hybrid da.ping pa.a.eter, which is suita.le for coordina.ion the a.titude of the vehicle body a.d the wheels. a.test a.d control system.for the vibra.ion a.titude of full ca. is set up. It is im.lem.nted on a.ca. equipped with four m. suspensions. The results on ra.dom.highwa. a.d rough roa. indica.e tha. the fuzzy hybrid controller ca. decrea.e the vibra.ion a.celera.ions of the vehicle body a.d the wheels to 65%-80% a.d 80%-90%, respectively. It reduces the a.tom.tive vibra.ions of hea.e, roll a.d pitch m.re effectively tha. a.pa.sive suspension a.d a. m. suspension with a.tra.itiona. hybrid control schem. so tha. it a.hieves better ride com.ort a.d roa. holding concurrently. This pa.er proposes a.new fuzzy hybrid control（FHC） m.thod for reducing vibra.ion a.titude of full ca. via.m. suspensions a.d develops a.roa. test to eva.ua.e the FHC.

关键词： ca. m.0}neto-rheologica. suspension vibra.ion a.titude fuzzy control hybrid da.ping control roa. test

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