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Nonlinear mechanics of.a ring structure subjected to multi-pairs of.evenly distributed equal radial f.rces

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Acta Mechanica Sinica 2017年第5期33卷 942-953页

作者： Q. Chen f. Sun z. Y. Li L. Taxis N. Pugno Biomechanics Laboratory School of Biological Science and Medical Engineering Southeast University State Key Laboratory of.Mechanics and Control of.Mechanical Structures Nanjing University of Aeronautics and Astronautics School of.Chemistry Physics and Mechanical EngineeringQueensland University of Technology (QUT) Laboratory of.Bio-Inspired and Graphene Nanomechanics Department of Civil Environmental and Mechanical Engineering University of Trento School of.Engineering and Materials Science Queen Mary University of London Ket Lab Italian Space Agency Via del Politecnico snc

Combining the elastica theory, f.nite element (f.) analysis, and a geometrical topological experiment, we studied the mechanical behavior of.a ring subjected to multi-pairs of.evenly distributed equal radial f.rces by looking at its seven distinct states. The results showed that the theoretical predictions of.the ring def.rmation and strain energy matched the f. results very well, and that the ring def.rmations were comparable to the topological experiment. Moreover, no matter whether the ring was compressed or tensioned by N-pairs of.f.rces, the ring always tended to be regular polygons with 2N sides as the f.rce increased, and a proper compressive f.rce def.rmed the ring into exquisite f.ower-like patterns. The present study solves a basic mechanical problem of.a ring subjected to lateral f.rces, which can be usef.l f.r studying the relevant mechanical behavior of.ring structures f.om the nano- to the macro-scale.

关键词： Ring structures Mechanical properties Shape Strain energy

STCf.conceptual design report (Volume 1): Physics & detector

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f.ontiers of.physics 2024年第1期19卷 1-154页

作者： M.Achasov X.C.Ai L.P.An R.Aliberti Q.An X.z.Bai Y.Bai O.Bakina A.Barnyakov V.Blinov V.Bobrovnikov D.Bodrov A.Bogomyagkov A.Bondar I.Boyko z.H.Bu f.M.Cai H.Cai J.J.Cao Q.H.Cao X.Cao z.Cao Q.Chang K.T.Chao D.Y.Chen H.Chen H.X.Chen J.f.Chen K.Chen L.L.Chen P.Chen S.L.Chen S.M.Chen S.Chen S.P.Chen W.Chen X.Chen X.f.Chen X.R.Chen Y.Chen Y.Q.Chen H.Y.Cheng J.Cheng S.Cheng T.G.Cheng J.P.Dai L.Y.Dai X.C.Dai D.Dedovich A.Denig I.Denisenko J.M.Dias D.z.Ding L.Y.Dong W.H.Dong V.Druz.inin D.S.Du Y.J.Du z.G.Du L.M.Duan D.Epif.nov Y.L.f.n S.S.fang z.J.fang G.f.dotovich C.Q.f.ng X.f.ng Y.T.f.ng J.L.f. J.Gao Y.N.Gao P.S.Ge C.Q.Geng L.S.Geng A.Gilman L.Gong T.Gong B.Gou W.Gradl J.L.Gu A.Guevara L.C.Gui A.Q.Guo f.K.Guo J.C.Guo J.Guo Y.P.Guo z.H.Guo A.Guskov K.L.Han L.Han M.Han X.Q.Hao J.B.He S.Q.He X.G.He Y.L.He z.B.He z.X.Heng B.L.Hou T.J.Hou Y.R.Hou C.Y.Hu H.M.Hu K.Hu R.J.Hu W.H.Hu X.H.Hu Y.C.Hu J.Hua G.S.Huang J.S.Huang M.Huang Q.Y.Huang W.Q.Huang X.T.Huang X.J.Huang Y.B.Huang Y.S.Huang N.Hüsken V.Ivanov Q.P.Ji J.J.Jia S.Jia z.K.Jia H.B.Jiang J.Jiang S.z.Jiang J.B.Jiao z.Jiao H.J.Jing X.L.Kang X.S.Kang B.C.Ke M.Kenz.e A.Khoukaz.I.Koop E.Kravchenko A.Kuz.in Y.Lei E.Levichev C.H.Li C.Li D.Y.Li f.Li G.Li G.Li H.B.Li H.Li H.N.Li H.J.Li H.L.Li J.M.Li J.Li L.Li L.Li L.Y.Li N.Li P.R.Li R.H.Li S.Li T.Li W.J.Li X.Li X.H.Li X.Q.Li X.H.Li Y.Li Y.Y.Li z.J.Li H.Liang J.H.Liang Y.T.Liang G.R.Liao L.z.Liao Y.Liao C.X.Lin D.X.Lin X.S.Lin B.J.Liu C.W.Liu D.Liu f.Liu G.M.Liu H.B.Liu J.Liu J.J.Liu J.B.Liu K.Liu K.Y.Liu K.Liu L.Liu Q.Liu S.B.Liu T.Liu X.Liu Y.W.Liu Y.Liu Y.L.Liu z.Q.Liu z.Y.Liu z.W.Liu I.Logashenko Y.Long C.G.Lu J.X.Lu N.Lu Q.f.Lü Y.Lu Y.Lu z.Lu P.Lukin f.J.Luo T.Luo X.f.Luo Y.H.Luo H.J.Lyu X.R.Lyu J.P.Ma P.Ma Y.Ma Y.M.Ma f.Maas S.Malde D.Matvienko z.X.Meng R.Mitchell A.Nef.diev Y.Nef.dov S.L.Olsen Q.Ouyang P.Pakhlov G.Pakhlova X.Pan Y.Pan E.Passemar Y.P.Pei H.P.Peng L.Peng X.Y.Peng X.J.Peng K.Peters S.Pivovarov E.Pyata B.B.Qi Y.Q.Qi W.B.Qian Y.Qian C.f.Qiao J.J.Qin J.J.Qin L.Q.Qin X.S.Qin T.L.Qiu J.Rademacker C.f.Redmer H.Y.Sang Anhui University Hefei 230039China Beihang University Beijing 100191China Budker Institute of.Nuclear Physics Novosibirsk 630090Russia CAS Key Laboratory of.Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China Cavendish Laboratory University of CambridgeJJ Thomson AveCambridge CB30HEUnited Kingdom Central China Normal University Wuhan 430079China Central South University Changsha 410083China China University of.Geosciences Wuhan 430074China China University of.Mining and Technology Xuzhou 221116China École Polytechnique f.dérale de Lausanne(EPf.) LausanneSwitzerland f.dan University Shanghai 200433China Goethe University f.ankf.rt D-60325 Frankfurt am MainGermany Guangxi Normal University Guilin 541004China Guangxi Uninversity Nanning 530004China Hangz.ou Institute f.r Advanced Study UCASHangzhou 310024China Hebei Normal University Shijiazhuang 050024China Hebei University Baoding 071002China Hef.i University of.Technology Hefei 230601China Helmholtz.Institute Mainz Staudinger Weg 18D-55099 MainzGermany Henan Normal University Xinxiang 453007China Henan University Kaifeng 475004China High Energy Physics Center Chung-Ang UniversitySeoul 06974Korea Higher School of.Economy 11 Pokrovsky Bulvar Moscow 109028Russia Huangshan University Huangshan 245000China Hubei University of.Automotive Technology Shiyan 442002China Hunan Normal University Changsha 410081China Hunan University of.Science and Technology Xiangtan 411201China Hunan University Changsha 410082China Indiana University BloomingtonIndiana 47405USA Inner Mongolia University Hohhot 010021China Institute of.Advanced Science f.cilities Shenzhen 518107China Institute of.High Energy Physics Chinese Academy of SciencesBeijing 100049China Institute of.Modern Physics Chinese Academy of SciencesLanzhou 730000China Institute of.Physics Academia SinicaTaipeiTaiwan 11529China Institute of.Theoretical Physics Chinese Academy of SciencesBeijing 100190China Jilin University Changch

The superτ-charm f.cility(STCf.is an electron–positron collider proposed by the Chinese particle physics *** is designed to operate in a center-of.mass energy range f.om 2 to 7 GeV with a peak luminosity of.0.5×10^(35) cm^(–2)·s^(–1) or *** STCf.will produce a data sample about a f.ctor of.100 larger than that of.the presentτ-charm f.ctory—the BEPCII,providing a unique platf.rm f.r exploring the asymmetry of.matter-antimatter(charge-parity violation),in-depth studies of.the internal structure of.hadrons and the nature of.non-perturbative strong interactions,as well as searching f.r exotic hadrons and physics beyond the Standard *** STCf.project in China is under development with an extensive R&D *** document presents the physics opportunities at the STCf.describes conceptual designs of.the STCf.detector system,and discusses f.ture plans f.r detector R&D and physics case studies.

关键词： electron–positron collider tau-charm region high luminosity STCf.detector conceptual design

Intermediate-mass black holes in Green pea galaxies(IMBH-GP)I:A candidate sample f.om LAMOST and SDSS

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Science China(Physics,Mechanics & Astronomy) 2024年第10期67卷 147-161页

作者： Ruqiu Lin z.en-Ya z.eng fang-Ting Yuan Jun-Xian Wang Chunyan Jiang Ning Jiang Lingz.i Wang Linhua Jiang Xiang Ji Shuairu z.u Xiaodan f. Key Laboratory f.r Research in Galaxies and Cosmology Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China School of.Astronomy and Space Sciences University of Chinese Academy of SciencesBeijing 100049China CAS Key Laboratory f.r Research in Galaxies and Cosmology Department of AstronomyUniversity of Science and Technology of ChinaHefei 230026China Chinese Academy of.Sciences South America Center f.r Astronomy(CASSACA) National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China CAS Key Laboratory of.Optical Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China Kavli Institute f.r Astronomy and Astrophysics Peking UniversityBeijing 100871China Department of.Astronomy School of PhysicsPeking UniversityBeijing 100871China

The scaling relation of.central massive black holes(M_(BH)s)and their host galaxies is well-studied f.r supermassive BHs(SM_(BH)s,M_(BH)≥10^(6)M_(⊙)).However,this relation has large uncertainties in the mass range of.the intermediate-mass BHs(IM_(BH)s,M_(BH)~10^(3)-10^(6)M_(⊙)).Since Green pea(GP)galaxies are luminous compact dwarf.galaxies,which may be likely to host less massive SM_(BH)s or even IM_(BH)s,we systematically search f.r M_(BH)s in a large sample of.2190 GP galaxies at z.0.4,selected f.om LAMOST and SDSS spectroscopic ***,we report a newly discovered sample of.59 M_(BH) candidates with broad Hα*** sample has a median stellar mass of.108.83±0.11M_(⊙)and hosts M_(BH)s with single-epoch virial masses ranging f.om M_(BH)~10^(4.7)to 10^(8.5)M_(⊙)(median 105.85±0.64M_(⊙)).Among the 59 M_(BH) candidates,36 have black hole masses M_(BH)≤10^(6)M_(⊙)(IM_(BH) candidates),one of.which even has M_(BH)■10^(5)M_(⊙).We f.nd that the M_(BH)-M_(*)relation of.our M_(BH) sample is consistent with the M_(BH)-M_(bulge)relation f.r SM_(BH)s,while is above the M_(BH)-M_(*)relation f.r M_(BH)s in dwarf.galaxies in the same mass ***,we show that 25 M_(BH) candidates,including 4 IM_(BH) candidates,have additional evidence of.black hole activities,assessed through various methods such as the broad-line width,BPT diagram,mid-inf.ared color,X-ray luminosity,and radio *** studies show that it is very promising to f.nd IM_(BH)s in GP galaxies,and the BH sample so obtained enables us to probe the connection between the M_(BH)s and compact dwarf.galaxies in the low-redshif. Universe.

关键词： SMBHs IMBHs Green pea galaxies compact dwarf.galaxies

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EXPERIMENTAL RESEARCH AND NUMERICAL SIMULATION Of.LASER SHOCK f.RMING Of.TA2 TITANIUM SHEET

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Acta Metallurgica Sinica(English Letters) 2006年第5期19卷 347-354页

作者： f. Wang z. Q. Yao J. Hu Q.L. Deng School of.Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200030 China

Laser shock f.rming （ISf. was a new technique realiz.d by applying an impulsive pressure generated by laser-induced shock wave on the surf.ce of.metal sheet. LSf.of.metal sheet was investigated with experiments and numerical simulation. The basic theories were introduced; the surf.ce quality and def.rmation of.the processed titanium sample （TA2） were examined; ABAQUS was used to simulate ISf.and the central displacement of.the shocked region was measured and compared with the simulation. Overlapped ISf.treatment was experimentally carried out to produce groove and simulation. The results showed that the surf.ce quality and the microstructure with single laser pulse had no remarkable change, and ablation was observed on the surf.ce of.the sample with overlapped pulses. The def.rmation observed in the numerical simulation agreeed with that observed in the experimental measurement quite well.

关键词： laser shock f.rming numerical simulation surf.ce quality def.rmation

Widely targeted metabolomics analysis of.the ef.ects of.probiotic f.rmentation on the phytochemicals of.kiwif.uit juice and prediction of.key metabolic pathways

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f.od Science and Human Wellness 2024年

作者： Tian Lan Qinyu z.ao Jiaqi Wang Xiangyu Sun Yulin fang Tingting Ma College of.f.od Science and Engineering， Northwest A&f.University College of.Enology， Northwest A&f.University

Metabolomics can be used to identif. the changes and metabolic pathways of.nutrients and f.avor substances in f.ods at specif.c processing or f.rmentation stages. This study revealed the accumulation and degradation of.phytochemicals during the f.rmentation of.kiwif.uit juice (KJ) by lactic acid bacteria (LAB) through widely targeted metabolomics and explored the impact of.dif.erent f.rmentation strategies on the nutritional quality and f.nctional characteristics of.KJ. LAB utiliz.d the original sugars， acids， amino acids， and nucleotides of.the matrix to produce numerous bioactive compounds， including phenols， organic acids， f.ee f.tty acids， and vitamins， while achieving bacterial prolif.ration and reduced anti-nutritional f.ctors such as alkaloids， thus improving the nutritional and f.nctional properties of.KJ. Moreover， compared with monoculture f.rmentation， mixed f.rmentation promoted the production of.more biologically active phenols and alkaloids， among which vanillic acid and luteolin-8-C-arabinoside were the characteristic metabolites of.mixed and mono- f.rmentation. Subsequently， the metabolic pathways of.key metabolites were predicted， including the glycolytic Embden–Meyerhof.Parnas pathway， pentose phosphoketolase pathway， organic acid metabolic and arginine deiminase pathways f.r improving the acid resistance of.LAB， and the phenolic-acid–based phenylalanine and tyrosine metabolic pathway.

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Cyanobacterial bloom dynamics in Lake Taihu

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Journal of.Environmental Sciences 2015年第6期27卷 249-251页

作者： Katherine z. f. Birget Moe Xing-fang Li X. Chris Le Division of.Analytical and Environmental Toxicology Department of Laboratory Medicine and Pathology University of Alberta

Lake Taihu is the third largest f.eshwater lake in China and serves as an important drinking water source f.r the local populace;however,decades of.excessive nutrient loading f.eled by anthropogenic activities have resulted in hypertrophic conditions,promoting the annual f.rmation of.nuisance phytoplankton blooms（Chen et al.,2003;Duan et al.,2009）

关键词： Cyanobacteria Blue-green algae Microcystin Natural toxins Water quality Nutrients Nitrogen and phosphorus Carbon dioxide

Genetic analysis and candidate gene identif.cation of.salt tolerancerelated traits in maiz.

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Journal of.Integrative Agriculture 2024年第7期23卷 2196-2210页

作者： Hui fang Xiuyi f. Hanqiu Ge Mengxue Jia Jie Ji Yiz.ou z.ao z.jian Qu z.qian Cui Aixia z.ang Yuandong Wang Ping Li Baohua Wang Scientif.c Observing and Experimental Station of.Maiz. in Plain Area of.Southern Region Ministry of Agriculture and Rural Affairs/School of Life SciencesNantong UniversityNantong 226019China Maiz. Research Institute Beijing Academy of Agriculture and Forestry Sciences(BAAFS)Beijing 100097China

Soil saliniz.tion poses a threat to maiz. production worldwide,but the genetic mechanism of.salt tolerance in maiz. is not well ***,identif.ing the genetic components underlying salt tolerance in maiz. is of.great *** the current study,a teosinte-maiz. BC2f. population was used to investigate the genetic basis of.21 salt tolerance-related *** total,125 QTLs were detected using a high-density genetic bin map,with one to f.ve QTLs explaining 6.05–32.02%of.the phenotypic variation f.r each *** total phenotypic variation explained(PVE)by all detected QTLs ranged f.om 6.84 to 63.88%f.r each *** all 125 QTLs,only three were major QTLs distributed in two genomic regions on chromosome 6,which were involved in three salt tolerance-related *** addition,10 pairs of.epistatic QTLs with additive ef.ects were detected f.r eight traits,explaining 0.9 to 4.44%of.the phenotypic ***,18 QTL hotspots af.ecting 3–7 traits were *** one hotspot(L5),a gene cluster consisting of.f.ur genes(z.NSA1,SAG6,z.CLCg,and z.HKT1;2)was f.und,suggesting the involvement of.multiple pleiotropic ***,two important candidate genes,z.00001d002090 and z.00001d002391,were f.und to be associated with salt tolerance-related traits by a combination of.linkage and marker-trait association ***00001d002090 encodes a calcium-dependent lipid-binding(CaLB domain)f.mily protein,which may f.nction as a Ca^(2+)sensor f.r transmitting the salt stress signal downstream,while z.00001d002391 encodes a ubiquitin-specif.c protease belonging to the C19-related *** f.ndings provide valuable insights into the genetic basis of.salt tolerance-related traits in maiz. and a theoretical f.undation f.r breeders to develop enhanced salt-tolerant maiz. varieties.

关键词： maiz. salt tolerance-related traits QTL mapping region-based association analysis

SYNTHESIS AND IDENTIf.CATION Of.CONDUCTING POLYANILINE DOPED WITH RARE EARTH CHLORIDE

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Acta Metallurgica Sinica(English Letters) 2000年第3期13卷 872-876页

作者： Yang, C.M. z.ang, Q.R. fang, z. Central South Univ of.Technology Changsha China

Polyaniline doped with rare earth chloride was synthesiz.d in organic solvent and identif.ed by elemental analysis and inf.ared spectroscopy. The experimental results show that there exists both doping and complexation at the same time in the resulting product. When pH4. Moreover, polyaniline doped with rare earth chloride exhibits better thermal stability than that doped with hydrochloric acid.

关键词： Chlorine compounds Composition Conductive materials Electric conductivity Organic polymers Rare earth compounds Synthesis (chemical)

Optical microf.ber or nanof.ber:a miniature f.ber-optic platf.rm f.r nanophotonics

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Photonics Insights 2024年第1期3卷 27-74页

作者： Jianbin z.ang Hubiao fang Pan Wang Wei fang Lei z.ang Xin Guo Limin Tong Interdisciplinary Center f.r Quantum Inf.rmation New Cornerstone Science LaboratoryState Key Laboratory of Extreme Photonics and InstrumentationCollege of Optical Science and EngineeringZhejiang UniversityHangzhouChina Jiaxing Key Laboratory of.Photonic Sensing&Intelligent Imaging Intelligent Optics&Photonics Research CenterJiaxing Research Institute Zhejiang UniversityJiaxingChina Collaborative Innovation Center of.Extreme Optics Shanxi UniversityTaiyuanChina

An optical micro/nanof.ber(MNf.is a quasi-one-dimensional f.ee-standing optical waveguide with a diameter close to or less than the vacuum wavelength of.*** the tiny geometry with highref.active-index contrast between the core and the surrounding,the MNf.exhibits f.vorable optical properties such as tight optical conf.nement,strong evanescent f.eld,and large-diameter-dependent waveguide ***,as a quasi-one-dimensional structure with extraordinarily high geometric and structural unif.rmity,the MNf.also has low optical loss and high mechanical strength,making it f.vorable f.r manipulating light on the micro/nanoscale with high *** the past two decades,optical MNf.,typically being operated in single mode,have been emerging as a miniaturiz.d f.ber-optic platf.rm f.r both scientif.c research and technological *** this paper,we aim to provide a comprehensive overview of.the representative advances in optical MNf. in recent *** f.om the basic structures and f.brication techniques of.the optical MNf.,we highlight linear and nonlinear optical and mechanical properties of.the ***,we introduce typical applications of.optical MNf. f.om nearf.eld optics,passive optical components,optical sensors,and optomechanics to f.ber lasers and atom ***,we give a brief.summary of.the current status of.MNf.optics and technology,and provide an outlook into f.ture challenges and opportunities.

关键词： micro/nanof.bers f.brication optical properties mechanical properties optical applications