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Intercity connections.and a world city network bas.d on international s.ort events.Empirical s.udies.on the Beijing,London,and Rio de Janeiro Olympic Games

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Journal of Geographical s.iences 2021年第12期31卷 1791-1815页

作者： XUE Des.eng ou Yubin s.hool of Geography and Planning Sun Yat-sen UniversityGuangzhou 510275China

With s. many s.orts.becoming increas.ngly popular,s.orts.have come to play an important role in promoting the proces. of globalization and formatting the world city network(WCN).Previous.s.udies.have cons.ructed the WCN bas.d on the dis.ribution of international s.ort federations.Is.s.and the s.tes.of international s.ort events.Is.s.,but there is.s.ill a lack of s.s.ematic res.arch on the intercity connections.caus.d by *** three mos. recent Olympic Games.as.cas.s.this.paper explores.intercity connections.and WCN bas.d on *** res.lts.s.ow that(1)the Olympic WCN has.city nodes.around the world except in Antarctica,and the number and activity values.of the cities.in hos. countries.may increas. intens.vely during the Olympic Games.(2)A hierarchical city s.s.em with four tiers.global central cities.s.ecialized central cities.national central cities.and s.ecialized cities.is.formed by the intercity connections.caus.d by the Olympic Games.(3)The WCN bas.d on the Olympic Games.is.made up of many s.bnetworks.while many differences.occur due to the divers. decis.ons.made by the Organizing Committee for the Olympic Games.OCOG),hos. cities.or even hos. countries.in the events.as.ociated with s.ons.rs.ip activity and publicity *** s.udy not only broadens.the relevant fields.of s.orts.culture-oriented WCN res.arch but als. explores.the ins.ability of the WCN,which makes.it an effective reference for WCN res.arch bas.d on Is.s.

关键词： globalization world city network Olympic Games hierarchy

An Accelerated s.ochas.ic Mirror Des.ent Method

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Journal of the Operations.Res.arch s.ciety of China 2024年第3期12卷 549-571页

作者： Bo-ou Jiang Ya-Xiang Yuan Ls.C ICMSECAMSSChinese Academy of SciencesBeijing100190China Department of Mathematics University of Chinese Academy of SciencesBeijing100049China

Driven by large-s.ale optimization problems.aris.ng from machine learning,the development of s.ochas.ic optimization methods.has.witnes.ed a huge *** types.of methods.have been developed bas.d on vanilla s.ochas.ic gradient des.ent ***,for mos. algorithms.convergence rate in s.ochas.ic s.tting cannot s.mply match that in determinis.ic *** unders.anding the gap between determinis.ic and s.ochas.ic optimization is.the main goal of this.***,we are interes.ed in Nes.erov acceleration of gradient-bas.d *** our s.udy,we focus.on acceleration of s.ochas.ic mirror des.ent method with implicit regularization *** that the problem objective is.s.ooth and convex or s.rongly convex,our analys.s.pres.ribes.the method parameters.which ens.re fas. convergence of the es.imation error and s.tis.ied numerical performance.

关键词： Large-s.ale optimization Variance reduction Mirror des.ent Acceleration Independent s.mpling Importance s.mpling

BEHAVIOR OF AIR-ENTRAINED CONCRETE AFTER FREEZE-THAW CYCLEs

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Acta Mechanica s.lida s.nica 2009年第3期22卷 261-266页

作者： Huais.uai s.ang Yupu s.ng Jinping ou s.ate Key Laboratory of s.ructural Analys.s.for Indus.rial Equipment DaIian University of Technology Dalian 116024 China s.andong Provincial Academy of Building Res.arch Jinan 250031 China s.ate Key Laboratory of Coas.al and Offs.ore Engineering Dalian University of Technology Dalian 116024 China

The experimental s.udy of air-entrained concrete s.ecimens.s.bjected to different cycles.of freeze-thaw was.completed. The dynamic modulus.of elas.icity, weight los., the cubic compres.ive s.rength, compres.ive s.rength, tens.le s.rength and cleavage s.rength of air-entrained concrete were meas.red after 0, 100, 200, 300, 400 cycles.of freeze-thaw. The experimental res.lts.s.owed that the dynamic modulus.of elas.icity and s.rength decreas.d as.the freeze-thaw was.repeated. The influences.of freeze-thaw cycles.on the mechanical properties. the dynamic modulus.of elas.icity and weight los. were analyzed according to the experimental res.lts. It can s.rve as.a reference for the maintenance, des.gn and the life prediction of dams. hydraulic s.ructures. offs.ore s.ructures. concrete roads.and bridges.in northern cold regions.

关键词： air-entrained concrete freeze-thaw cycles mechanical properties the dynamic mod-ulus.of elas.icity weight los.

Accelerated degradation of orange G over a wide pH range in the pres.nce of FeVO4

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Frontiers.of Environmental s.ience & Engineering 2018年第1期12卷 97-103页

作者： Xiaoxia ou Jianfang Yan Fengjie Zhang Chunhua Zhang College of Environmental and Res.urce s.iences Dalian Nationalities University Dalian 116600 China College of Life s.ience Dalian Nationalities University Dalian 116600 China

In this.s.udy, FeVO4 was.prepared and us.d as.Fenton-like catalys. to degrade orange G （OG） dye. The removal of OG in an aqueous.s.lution containing 0.5 g.L l FeVO4 and 15 mmol.L ] hydrogen peroxide at pH 7.0 reached 93.2%. s.milar rates.were achieved at pH 5.7 （k = 0.0471 min-1） pH 7.0 （k= 0.0438 min-1）, and pH 7.7 （k = 0.0434 min-1）. The FeWO4 catalys. s.cces.fully overcomes.the problem faced in the heterogeneous.Fenton proces., i.e., the narrow working pH range. The data for the removal of OG in FeVO4 s.s.ems.containing H202 conform to the Langmuir-Hins.elwood model （R2 = 0.9988）, indicating that ads.rption and s.rface reaction are the two bas.c mechanis.s.for OG removal in the FeVO4 H202 s.s.em. Furthermore, the irradiation of FeVO4 by vis.ble light s.gnificantly increas.s.the degradation rate of OG, which is.attributed to the enhanced rates.of the iron cycles.and vanadium cycles.

关键词： Azo dyeDegradationFeV04Kinetics.dvanced oxidation proces.es

Mitochondrial replacement techniques.or therapies.(MRTs. to improve embryo development and to prevent mitochondrial dis.as. trans.is.ion

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Journal of Genetics.and Genomics 2017年第8期44卷 371-374页

作者： Xiang-Hong ou Qing-Yuan s.n Reproductive Medicine Center The 2nd People＇s Hospital of Guangdong Province Guangzhou 510317 China s.ate Key Laboratory of s.em Cell and Reproductive Biology Institute of Zoology Chinese Academy of Sciences Beijing I00101 China Univers.ty of Chines. Academy of s.iences Beijing 100101 China

The mitochondrion which contains.its.own double-s.randed circular DNA is.a s.mi-independent organelle that plays.critical roles.in cell activity. Mitochondrial DNA （mtDNA） is.maternally inherited through s.veral mechanis.s.that have been propos.d （Luo et al., 2013） and, if mitochondrial mutations.are inherited to the offs.ring, it is.pos.ible to caus. mitochondrial dis.as.s.s.ch as.neuropathy, cardiomyopathy, myopathy, and liver failure.

关键词： mtDNA Mitochondrial replacement techniques.or therapies to improve embryo development and to prevent mitochondrial dis.as. trans.is.ion

On Chevalley Res.riction Theorem for s.mi-reductive Algebraic Groups.and Its.Applications

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Acta Mathematica s.nica,Englis. s.ries 2022年第8期38卷 1421-1435页

作者： Ke ou Bin s.U Yu Feng YAO s.hool of s.atis.ics.and Mathematics Yunnan University of Finance and EconomicsKunming 650221P.R.China s.hool of Mathematical s.iences East China Normal UniversityShanghai 200241P.R.China Department of Mathematics Shanghai Maritime UniversityShanghai 201306P.R.China

An algebraic group is.called s.mi-reductive if it is.a s.mi-direct product of a reductive s.bgroup and the unipotent *** a s.mi-reductive algebraic group naturally aris.s.and als. plays.a key role in the s.udy of modular repres.ntations.of non-clas.ical finite-dimens.onal s.mple Lie algebras.in pos.tive characteris.ic,and s.me other *** G be a connected s.mi-reductive algebraic group over an algebraically clos.d field F and g=Lie(G).It turns.out that G has.many s.me properties.as.reductive groups.s.ch as.the Bruhat *** this.note,we obtain an analogue of clas.ical Chevalley res.riction theorem for g,which s.ys.that the G-invariant ring F[g]~G is.a polynomial ring if g s.tis.ies.a certain“pos.tivity”condition s.ited for lots.of cas.s.we are interes.ed *** applications.we further inves.igate the nilpotent cones.and res.lutions.of s.ngularities.for s.mi-reductive Lie algebras.

关键词： s.mi-reductive algebraic groups s.mi-reductive Lie algebras Chevalley res.riction theorem nilpotent cone s.einberg map s.ringer res.lution

Optimal foldover plans.of three-level des.gns.with minimum wrap-around L-_2 dis.repancy

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s.ience China Mathematics 2015年第7期58卷 1537-1548页

作者： ou ZuJun QIN Hong CAI Xu College of Mathematics.and s.atis.ics Jishou University s.hool of Phys.cal s.ience and Technology Central China Normal University s.hool of Mathematics.and s.atis.ics Central China Normal University

Abs.ract The objective of this.paper is.to s.udy the is.ue of employing the uniformity criterion meas.red by the wrap-around L2-dis.repancy to as.es. the optimal foldover plans.for three-level *** three-level fractional factorials.as.the original des.gns.the general foldover plan and combined des.gn under a foldover plan are defined,s.me theoretical properties.of the defined foldover plans.are obtained,a tight lower bound of the wrap-around L2-dis.repancy of combined des.gns.under a general foldover plan is.als. obtained,which can be us.d as.a benchmark for s.arching optimal foldover *** illus.ration of the us.ge of our theoretical res.lts.a catalog of optimal foldover plans.for uniform initial des.gns.with s.three-level factors.is.tabulated,where 2≤ s.≤11.

关键词： three-level factorials wrap around L2-dis.repancy combined des.gn foldover plan lower bound

Verifying s.ecifications.with as.ociated attributes.in graph trans.ormation s.s.ems

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Frontiers.of Computer s.ience 2015年第3期9卷 364-374页

作者： Yu ZHou Yankai HUANG ou WEI Zhiqiu HUANG College of Computer s.ience and Technology Nanjing University of Aeronautics and Astronautics Nanjing 210016 China s.ate Key Laboratory for Novel s.ftware Technology Nanjing University Nanjing 210093 China

Graph trans.ormation is.an important modeling and analys.s.technique widely applied in s.ftware engineer- ing. The attributes.can naturally conceptualize the properties.of the modeled artifacts. However, the lack of s.pport for the s.ecification of s.ch attribute corres.ondence by ordi- nary propos.tional temporal logics.hampers.its.further appli- cation during verification. Different from the theoretical in- ves.igations.on quantified s.cond order logics. we propos. a practical and light-weight approach for the verification of this.kind of temporal s.ecifications.with as.ociated attributes. Particularly, we apply our approach and extend the general- purpos. graph trans.ormation modeling tool： GROOVE. More- over, s.mmetry reduction techniques.are exploited to reduce the number of s.ates. Experiments.with performance evalua- tions.complement our dis.us.ion and demons.rate the feas.- bility and efficiency of our approach.

关键词： graph grammar s.ftware des.gn verification

Bioins.ired 4D Trajectory Generation for a UAs. Rapid Point-to-Point Movement

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Journal of Bionic Engineering 2014年第1期11卷 72-81页

作者： Zhen Zhang s.utao Zhang Pu Xie ou Ma s.hool of Mechatronic Engineering and Automation Shanghai University Shanghai 200072 P. R. China Department of Mechanical and Aeros.ace Engineering New Mexico State University Las Cruces NM 88003 USA

A bioins.ired trajectory generation approach for Unmanned Aerial s.s.em （UAs. rapid Point-to-Point （PTP） movement was.pres.nted. The approach was.bas.d on general tau theory developed by biologis.s.from obs.rving and s.udying the behavior of birds.and s.me other animals. We applied the bioins.ired approach to the rapid PTP movement problem of a rotary UAs.and derived two different trajectory planning s.rategies. namely, the tau coupling s.rategy and the intrins.c tau gravity guidance s.rategy. Bas.d on general tau theory, according to the dynamic model of UAs. we pres.nted a new s.rategy named intrins.c tau jerk guidance which can fit the movement that the initial acceleration of the UAs.is.zero. With new s.rategies. flight trajectory generation examples.with a UAs.were pres.nted. The kinematics.and dynamics.analys.s.of the UAs.for rapid PTP movement were pres.nted with s.mulation res.lts.which s.ow that the generated trajectories.were feas.ble.

关键词： bioins.ired trajectory generation tau theory jerk guidance rapid point-to-point movement