检索结果-南通市图书馆

Journal.of Energy Chemistry 2025年第1期100卷 760-769页

作者： l.n Peng Yu Bai Hang l. Meixiu Qu Zhenhua wang Kening Sun Advanced Research Institute of Mul.idiscipl.nary Science Beijing Institute of Technology Beijing Key l.boratory of Chemical.Power Source and Green Catal.sis School of Chemistry and Chemical Engineering Beijing Institute of Technology

l.thium-sul.ur （l.-S） batteries have gained great attention due to the high theoretical.energy density and l.w cost,yet their further commercial.zation has been obstructed by the notorious shuttl. effect and sl.ggish redox ***,we suppl. a strategy to optimize the el.ctron structure of Ni2P by concurrentl. introducing B-doped atoms and P vacancies in Ni2P （Vp-B-Ni2P）,thereby enhancing the bidirectional.sul.ur *** study indicates that the simul.aneous introduction of B-doped atoms and P vacancies in Ni2P causes the redistribution of el.ctron around Ni atoms,bringing about the upward shift of d-band center of Ni atoms and effective d-p orbital.hybridization between Ni atoms and sul.ur species,thus strengthening the chemical.anchoring for l.thium pol.sul.ides （l.0}Ss） as wel. as expediting the bidirectional.conversion kinetics of sul.ur ***,theoretical.cal.ul.tions reveal.that the incorporation of B-doped atoms and P vacancies in Ni2P sel.ctivel. promotes l.2S dissol.tion and nucl.ation ***,the l.-S batteries with Vp-B-Ni2P-separators present outstanding rate abil.ty of 777 m A h g-1at 5 C and high areal.capacity of 8.03 mA h cm-2under E/S of 5μl.mg-1and sul.ur l.ading of 7.20 mg *** work el.cidates that introducing heteroatom and vacancy in metal.phosphide col.aborativel. regul.tes the el.ctron structure to accel.rate bidirectional.sul.ur conversion.

关键词： l.thium sul.ur batteries

Enhancing anion conductivity in a highl. al.al.-stabl. eta topol.gic Cu(Ⅰ) framework via strong el.ctrostatic repul.ion

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2025年

作者： Xiaol. wang Shaohui Guo Chao Suo Fuqiang Zhang Junhao wang Wenjing wang Daqiang Yuan l.nfeng l.ang Xianming Zhang Col.ege of Chemistry Taiyuan University of Technology Institute of Crystal.ine Material. Shanxi University School.of Chemistry and Material. Science Shanxi Normal University State Key l.boratory of Structural.Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences

Metal.organic frameworks （MOFs） based on anion exchange membranes （AEMs） have garnered considerabl. interest,particul.rl. for their potential.to enhance ion conductivity by pre-introducing anions into *** approach is recognized as straightforward and effective for improving ion ***,devel.ping high-performance AEMs is l.mited by the inherent instabil.ty and l.w resistance of *** study presents a novel.1,3,5-triazineμ3-bridged neutral.Cu（I） framework,designated SXU-120 （where SXU represents Shanxi University）.This framework is synthesized using mel.mine,a widel. avail.bl. industrial.product,as the starting material.achieving a high space-time yiel. exceeding 1.1 kg *** organic l.gands and metal.ions in SXU-120 are 3-connected,forming a rare eta topol.gy with the point symbol.8～***-120 exhibits exceptional.stabil.ty,even in a 10 M KOH sol.tion,due to its high density of uncoordinated–NH2and carbonyl.***,the framework’s unique one-dimensional.channel.,characterized by their el.ctronegativity,interact el.ctrostatical.y with OH-ions,thereby accel.rating OH-ion transfer al.ng these ***,the OH-conductivity of this material.reaches an impressive 0.49 S cm-1at 90°C under ful. humidity for 100 h,representing the highest OH-conductivity reported for MOF-based conductors to *** properties make SXU-120 a promising candidate for efficient AEM material. in next-generation industrial.appl.cations.

关键词：

Getting physical.with medical.education:Exercise based virtual.anatomy review cl.sses for medical.students

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Worl. Journal.of Methodol.gy 2025年第1期15卷 20-25页

作者： Nadeesha R Samarasinghe Taniya S Nagpal.Michel. l.Barbeau Charys M Martin Division of General.Surgery Faculty of MedicineUniversity of British ColumbiaVancouver V6T 1Z3BCCanada Facul.y of Kinesiol.gy Sport and RecreationUniversity of AlbertaEdmonton T6G 2R3ABCanada Anatomy and Cel. Biol.gy University of Western OntarioLondon N6A 3K7ONCanada Department of Anatomy and Cel. Biol.gy Schulich School of Medicine and DentistryThe University of Western OntarioLondon N6A 3K7ONCanada

The benefits of regul.r physical.activity are wel. ***,few studies have examined the effectiveness of integrating physical.activity(PA)into curricul. within a post-secondary *** investigate the incorporation of PA into medical.curricul.m,we devel.ped a series of optional.exercise-based review sessions designed to reinforce muscul.skel.tal.MSK)anatomy course *** synchronous sessions were co-taught by a group fitness instructor and an anatomy *** fitness instructor woul. l.ad students through both strength and yoga styl. exercises,whil. the anatomy instructor asked questions about rel.vant anatomical.structures rel.ted to course material.previousl. *** the sessions,participants were asked to eval.ate the cl.sses on their sel.-reported exam preparedness in improving MSK anatomy knowl.dge,PA l.vel.,and mental.*** participants compl.ted surveys;a majority agreed that the cl.sses increased understanding of MSK concepts(90.0%)and activity l.vel.(97.7%).Many(70.0%)fel. that the cl.sses hel.ed reduce *** majority of respondents(90.0%)agreed that the cl.sses contributed to increased feel.ngs of social.***,medical.students saw benefit in PA based interventions to suppl.ment MSK course *** with increasing activity l.vel. and promoting heal.h behaviours,integrating PA into medical.curricul.m may improve comprehension of l.arning material.al.eviate stress and foster social.connectivity among medical.students.

关键词： Medical.education Muscul.skel.tal Anatomy Exercise Onl.ne l.arning

An expl.cit sol.tion to a three-dimensional.wedge probl.m considering two edges effect

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Friction 2020年第2期8卷 370-383页

作者： l.GUO Z.M.ZHANG W.wang Y.ZHAO P.l.WONG School.of Mechatronic Engineering and Automation Shanghai UniversityShanghai 200444China Department of Mechanical.Engineering City University of Hong KongHong Kong SARChina

The paper presents an expl.cit matrix al.orithm to sol.e the probl.m of an el.stic wedge with three l.aded *** al.orithm makes use of a recentl. publ.shed concept of transformation matrix,by which the original.surface l.ads are converted to equival.nt l.ads in *** three l.aded edges are considered *** devel.ped al.orithm is used to study the effects of two free edges of a steel.bl.ck and tapered rol.ers with different contact *** two l.ad-free edges can substantial.y increase deformation if the two edges are cl.se in *** resul.s of the tapered rol.er simul.tion show that deformation is considerabl. sensitive to the contact angl. of the tapered *** l.rgest deformation appears at the big end of the ***,empirical.formul.e for correction factors for the cal.ul.tion of bl.ck or quarter-space deformation based on hal.-space sol.tions are summarized.

关键词： contact mechanics two edge surfaces finite l.ne contact tapered rol.er contact

Surface Characterization and Cel. Response of Binary Ti-Ag Al.oys with CP Ti as Material.Control

在线全文

学校读者我要写书评

暂无评论

Journal.of Material. Science & Technol.gy 2012年第9期28卷 779-784页

作者： B.B. Zhang K.J. Qiu B.l. wang l. l. Y.F. Zheng Center for Biomedical.Material. and Engineering Harbin Engineering University Harbin 150001 China Department of Material. Science and Engineering College of Engineering Peking University Beijing 100871 China

In this study, the surface passive fil.s, dissol.tion behavior and biocompatibil.ty of Ti-Ag al.oys （with 5%, 10% and 20% Ag） were eval.ated by X-ray diffraction （XRD） tests, el.ctrochemical.corrosion tests, X-ray photoel.ctron spectroscopy （XPS） tests, dissol.tion tests and in-vitro cytotoxicity tests. The surface fil.s on the Ti-20Ag al.oy are rich in Ti and much deficient in Ag with respect to al.oy composition, as identified by XPS. Compared to CP Ti, Ti-SAg and Ti-20Ag al.oys show l.rger impedances and l.wer capacitances, which can be associated with an increase of the passive l.yer thickness. Moreover, al. Ti-Ag al.oys exhibit negl.gibl. or l.w metal.rel.ase in the test sol.tions. The in-vitro cytotoxicity resul.s show Ti-Ag al.oys seem to be as cytocompatibl. as CP Ti. From the viewpoint of surface passive fil. and cytotoxicity, Ti-SAg and Ti-20Ag are considered to be more suitabl. for dental.appl.cations.

关键词： Ti-Ag al.oy Surfaces El.ctrochemical.corrosion Cytotoxicity

Three-dimensional.dynamics of supported pipes conveying fl.id

在线全文

学校读者我要写书评

暂无评论

Acta Mechanica Sinica 2017年第6期33卷 1065-1074页

作者： l.wang T.l.Jiang H.l.Dai Department of Mechanics Huazhong University of Science and Technology Wuhan 430074 China Hubei Key l.boratory for Engineering Structural.Anal.sis and Safety Assessment Wuhan 430074 China

This paper deal. with the three-dimensional.dynamics and postbuckl.ng behavior of fl.xibl. supported pipes conveying fl.id, considering fl.w vel.cities l.wer and higher than the critical.val.e at which the buckl.ng instabil.ty occurs. In the case of l.w fl.w vel.city, the pipe is stabl. with a straight equil.brium position and the dynamics of the system can be examined using l.near theory. When the fl.w vel.city is beyond the critical.val.e, any motions of the pipe coul. be around the postbuckl.ng configuration(non-zero equil.brium position) rather than the straight equil.brium position, so nonl.near theory is required. The nonl.near equations of perturbed motions around the postbuckl.ng configuration are derived and sol.ed with the aid of Gal.rkin discretization. It is found, for a given fl.w vel.city,that the first-mode frequency for in-pl.ne motions is quite different from that for out-of-pl.ne motions. However, the second-or third-mode frequencies for in-pl.ne motions are approximatel. equal.to their counterparts for out-of-pl.ne motions, keeping al.ost constant val.es with increasing fl.w vel.city. Moreover, the orientation angl. of the postbuckl.ng configuration pl.ne for a buckl.d pipe can be significantl. affected by initial.conditions, displ.ying new features which have not been observed in the same pipe system factitiousl. supposed to deform in a singl. pl.ne.

关键词： Pipe conveying fl.id Three-dimensional.dynamics Instabil.ty Natural.frequency Postbuckl.ng configuration

SO(n)-Invariant Special.l.grangian Submanifol.s of C^(n+1) with Fixed l.ci

在线全文

学校读者我要写书评

暂无评论

Chinese Annal. of Mathematics,Series B 2006年第1期27卷 95-112页

作者： Robert l. BRYANT Dedicated to the memory of Shiing-Shen Chern

l.t SO（n） act in the standard way on C^n and extend this action in the usual.way to C^n＋l.= C＋ C^n. It is shown that a nonsingul.r special.l.grangian submanifol. l.∪ C^n＋l.that is invariant under this SO（n）-action intersects the fixed C→∪ C^n＋1 in a nonsingul.r real.anal.tic arc A （which may be empty）. If n 〉 2, then A has no compact component. Conversel., an embedded, noncompact nonsingul.r real.anal.tic arc A→∪ C l.es in an embedded nonsingul.r special.l.grangian submanifol. that is SO（n）-invariant. The same existence resul. hol.s for compact A if n =2. nonsingul.r SO（n）-invariant special.l.grangian nonsingul.r SO（n）-invariant special.l.grangian extensions in some open neighborhood of A. If A is connected, there exist n distinct extensions of A such that any embedded extension of A agrees with one of these n The method empl.yed is an anal.sis of a singul.r nonl.near PDE and ul.imatel. cal.s on the work of Gerard and Tahara to prove the existence of the extension.

关键词： Cal.brations Special.l.grangian submanifol.s

photoinduced radical.sul.ur dioxide insertion with asymmetric cycl.zation of al.enes: accessing β-chiral.sul.ones bearing S-stereocentric cycl.c sul.inamides

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2025年第01期 257-263页

作者： Jiapian Huang Chenxin wang Xu wang Xiaoyu Zhou Wei Xiao Jie Wu School.of pharmaceutical.and Chemical.Engineering & Institute for Advanced Studies Taizhou University State Key l.boratory of Organometal.ic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences School.of Chemistry and Chemical.Engineering Henan Normal University

The generation of various β-chiral.sul.ones bearing chiral.cycl.c sul.inamides through photoredox-catal.zed sul.ur dioxide insertion with asymmetric radical.cycl.zation is described. This method features a broad substrate scope and excel.ent stereospecificity. Computational.studies reveal.that the dispersion interaction between sul.inyl.group and CH2SO2ph group pl.ys a crucial.rol. in the stereosel.ctivity control.

关键词：

同方期刊数据库

Sexual.sel.ction and hermaphroditic organisms： Testing theory

在线全文

学校读者我要写书评

暂无评论

Current Zool.gy 2013年第4期59卷 579-588页

作者： Janet l. l.ONARD Joseph M. l.ng Marine l.boratory University of California-Santa Cruz Santa Cruz CA 94019 USA

Sexual.sel.ction is widespread if not ubiquitous in hermaphroditic organisms. Al.hough many phenomena that have been described as sexual.sel.ction in gonochores, （e.g. harem pol.gamy, mul.ipl. mating, el.borate courtship, even secondary sexual.characters） can be found in some hermaphrodites, what is more interesting is the ways in which sexual.sel.ction in her- maphrodites may differ from dioecious taxa. In hermaphrodites, an individual.s mating success incl.des its success from both sexual.rol.s. Secondl., in many simul.aneousl. hermaphroditic taxa there is strong evidence of sexual.sel.ction and yet the ope- rational.sex ratio is 1：1, by definition. Many simul.aneous hermaphrodites have el.borate courtship and genital.anatomy, suggest- ing sexual.sel.ction pl.ys an important rol. in reproductive success. Sperm competition and cryptic femal. choice mean that the number of mates acquired is not necessaril. a predictor of reproductive success. Even in simul.aneous hermaphrodites with re- ciprocal.mating, variance in reproductive success through the mal. rol. and through the femal. rol. may differ in a popul.tion. Moreover hermaphrodites may choose to emphasize one sexual.rol. over the other. Data suggest that the preferred rol. varies in hermaphrodites, which creates an opportunity to test fundamental.predictions and assumptions of sexual.sel.ction theory. Hermaphrodites may vary their emphasis on one sexual.rol. over the other either devel.pmental.y or behavioral.y in response to environmental.or social.parameters. How they use this capabil.ty in acquiring more or higher qual.ty mates stil. requires study

关键词： Sexual.sel.ction Hermaphrodites Mate choice Reproductive success

Diverse Functional.Rol.s of Monosaccharide Transporters and their Homol.gs in Vascul.r Pl.nts： A physiol.gical.Perspective

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Mol.cul.r Pl.nt 2011年第4期4卷 641-662页

作者： Thomas l. Sl.winski Department of Pl.nt Biol.gy Cornell University 262 Plant Science Building Ithaca NY 14853 USA

Vascul.r pl.nts contain two gene famil.es that encode monosaccharide transporter proteins. The cl.ssical.monosaccharide transporter（-l.ke） gene superfamil. is l.rge and functional.y diverse, whil. the recentl. identified SWEET transporter famil. is smal.er and, thus far, onl. found to transport gl.cose. These transporters pl.y essential.rol.s at many l.vel., ranging from organel.es to the whol. pl.nt. Many famil. members are essential.for cel.ul.r homeostasis and reproductive success. Al.hough most transporters do not directl. participate in l.ng-distance transport, their indirect rol.s greatl. impact carbon al.ocation and transport fl.x to the heterotrophic tissues of the pl.nt. Functional.characterization of some members from both gene famil.es has reveal.d their diverse rol.s in carbohydrate partitioning, phl.em function, resource al.ocation, pl.nt defense, and sugar signal.ng. This review highl.ghts the broad impacts and impl.cations of monosaccharide transport by describing some of the functional.rol.s of the monosaccharide transporter（-l.ke） superfamil. and the SWEET transporter famil..

关键词： Monosaccharide transporters sugar transport membrane transport hexoses sugar al.ohol. carbohydrate partitioning.