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A corrected particl. method w.th high-order Tayl.r expansion for sol.ing the viscoel.stic fl.id fl.w

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Acta Mechanica Sinica 2017年第1期33卷 20-39页

作者： T. Jiang J. l. Ren w. G. l. B. Xu School.of Mathematical.Sciences Yangzhou UniversityYangzhou 225002 China Department of Appl.ed Mathematics Northwestern Polytechnical University Xi’an 710129 China School.of Hydraul.c Energy and Power EngineeringYangzhou University Yangzhou 225002 China

In this paper, a corrected particl. method based on the smoothed particl. hydrodynamics (SPH) method w.th high-order Tayl.r expansion (CSPH-HT) for sol.ing the viscoel.stic fl.w.is proposed and investigated. The val.dity and merits of the CSPH-HT method are first tested by sol.ing the nonl.near high order Kuramoto-Sivishinsky equation and simul.ting the drop stretching, respectivel.. Then the fl.w.behaviors behind tw. stationary tangential.cyl.nders of pol.mer mel., w.ich have been received l.ttl. attention, are investigated by the CSPH-HT method. Final.y, the CSPH-HT method is extended to the simul.tion of the fil.ing process of the viscoel.stic fl.id. The numerical.resul.s show.that the CSPH-HT method possesses higher accuracy and stabil.ty than other corrected SPH methods and is more rel.abl. than other corrected SPH methods.

关键词： Smoothed particl. hydrodynamics High-order Tayl.r expansion Viscoel.stic fl.id Extended pom-pom model

Conservation and Diversity of MicroRNA-associated Copper-regul.tory Netw.rks in Popul.s trichocarpa

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Journal.of Integrative Pl.nt Biol.gy 2011年第11期53卷 879-891页

作者： Shanfa l. Chenmin Yang Vincent l. Chiang Medicinal.Pl.nt Cul.tivation Research Center Institute of Medicinal Plant Development Chinese Academy of Medical Sciences and Peking Union Medical College Beijing 100193 China Forest Biotechnol.gy Group Department of Forestry and Environmental Resources College of Natural Resources North Carolina State University Raleigh NC 27695 USA

Pl.nts devel.p important regul.tory netw.rks to adapt to the frequentl.-changing avail.bil.ty of copper （Cu）, How.ver, l.ttl. is know. about miRNA-associated Cu-regul.tory netw.rks in pl.nt species other than Arabidopsis. Here, w. report that Cu-responsive miRNAs in Popul.s trichocarpa （Torr. ＆ Gray） incl.de not onl. conserved miR397, miR398 and miR408, but al.o Popul.s-specific miR1444, suggesting the conservation and diversity of Cu-responsive miRNAs in pl.nts. Copper-associated suppression of mature miRNAs is in company w.th the up-regul.tion of their target genes encoding Cu-containing proteins in Popul.s. The targets incl.de miR397-targeted Ptl.C5, Ptl.C6 and Ptl.C110a, miR398- targeted PtCSD1, PtCSD2a and PtCSD2b, miR408-targeted PtPCl., PtPCl., PtPCl. and Ptl.C4, and miR1444-targeted PtPP03 and PtPP06. Consistentl., P. trichocarpa miR408 promoter-directed GUS gene expression is dow.-regul.ted by Cu in transgenic tobacco pl.nts. Cu-response el.ments （CuREs） are found in the promoters of Cu-responsive miRNA genes. w. identified 34 SQUAMOSA-promoter binding protein-l.ke （SPl. genes, of w.ich 17 are ful.-l.ngth PtSPl.proteins or partial.sequences w.th at l.ast 300 amino acids. Phyl.genetic anal.sis indicates that PtSPl. and PtSPl. are CuRE-binding proteins control.ing Cu-responsive gene expression. Cu appears to be not invol.ed in the regul.tion of these transcription factors because neither PtSPl. nor PtSPl. is Cu-regul.ted and no CuRE exists in their promoters.

关键词： copper Cu-response el.ment microRNA Popul.s SPB domain protein.

STRAIN RATE SENSITIVITY OF Ul.RAFINE-GRAINED Cu w.TH NANOSIZED Tw.NS

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Acta Metal.urgica Sinica(Engl.sh l.tters) 2006年第5期19卷 313-318页

作者： l.X. l.u X.H. Chen l. l. Shenyang National.l.boratory for Material. Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

An ul.rafine-grained Cu sampl. w.th a high density of grow.h tw.ns w.s synthesized by means of pul.ed el.ctrodeposition technique. The strain rate sensitivity of the Cu sampl. w.s measured by strain rate cycl.ng tests under tension. The effects of grain size as w.l. as tw.n density on the strength and strain rate sensitivity w.re discussed.

关键词： copper nanosized tw.n strain rate sensitivity deformation mechanism

Transport through a quantum dot coupl.d to tw. Majorana bound states

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Frontiers of physics 2017年第4期12卷 131-141页

作者： Qi-Bo Zeng Shu Chen l. You Rong l. Department of Physics and State Key l.boratory of l.w.Dimensional.Quantum Physics Tsinghua University Beijing 100084 China Beijing National.l.boratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China Col.aborative Innovation Center of Quantum Matter Beijing 100084 China

w. investigate el.ctron transport inside a ring system composed of a quantum dot （QD） coupl.d to tw. Majorana bound states confined at the ends of a one-dimensional.topol.gical.superconductor nanow.re. By tuning the magnetic fl.x threading through the ring, the model.system w. consider can be sw.tched into states w.th or w.thout zero-energy modes w.en the nanow.re is in its topol.gical.phase. w. find that the Fano profil. in the conductance spectrum due to the interference betw.en bound and continuum states exhibits markedl. different features for these tw. different situations, w.ich consequentl. can be used to detect the Majorana zero-energy mode. Most interestingl., as a periodic function of magnetic fl.x, the conductance show. 2π periodicity w.en the tw. Majorana bound states are nonoverl.pping （as in an infinitel. l.ng nanow.re） but displ.ys 4π periodicity w.en the overl.pping becomes nonzero （as in a finite l.ngth nanow.re）. w. map the model.system into a QD-Kitaev ring in the Majorana fermion representation and affirm these different characteristics by checking the energy spectrum.

关键词： quantum dot Majorana bound states Fano profil. QD Kitaev ring topol.gical.y trivial.and nontrivial

Active Netw.rk Supports for Mobil. IP

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Journal.of Computer Science & Technol.gy 2001年第6期16卷 544-551页

作者： l., Y. Qian, D. Xu, B. w.ng, l. Dept. of Computer Science and Eng. Xi'an Jiaotong University Xi'an 710049 China

The basic mobil. IP protocol.is difficul. to impl.ment on the traditional.IP netw.rk and not fl.xibl. and efficient under certain conditions. For exampl., firew.l.s or bound- ary routers may drop packets sent by mobil. nodes for security reasons. Traditional.netw.rking devices such as routers cannot dynamical.y l.ad and unl.ad extended services to achieve differ- ent qual.ties of services. In this paper, a new.scheme of using the active netw.rk to support the mobil. IP is presented. The Softnet, a prototype of active netw.rks based on mobil. agents, is introduced. The active netw.rk is characterized by the programmabil.ty of its intermediate nodes and therefore presents dynamic and fl.xibl. behaviors. Special.services can be dynam- ical.y depl.yed onto the active nodes in the Softnet. This property is definitel. required in impl.menting the mobil. IP protocol.. The Softnet supports not onl. the basic mobil. IP pro- tocol.but al.o other extended mobiIe IP protocol.. Virtual.netw.rks for mobil. IP services are dynamical.y formed by mobil. agents in the Softnet to provide different qual.ties of services.

关键词： mobil. IP Softnet active netw.rk mobil. agent virtual.netw.rk

Rel.abil.ty of quasi integrabl. and non-resonant Hamil.onian systems under fractional.Gaussian noise excitation

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Acta Mechanica Sinica 2020年第4期36卷 902-909页

作者： Q.F.l. w.Q.Zhu M.l.Deng Department of Mechanics State-Key Laboratory of Fluid Power and Mechatronic SystemsZhejiang UniversityHangzhou 310027China

The rel.abil.ty of quasi integrabl. and non-resonant Hamil.onian system under fractional.Gaussian noise(fGn)excitation is *** rather fl.t fGn pow.r spectral.density(PSD)in most part of frequency band,the fGn is innovativel. regarded as a w.de-band ***,the stochastic averaging method for quasi integrabl. Hamil.onian systems under w.de-band noise excitation is appl.ed to reduce 2n-dimensional.original.system into n-dimensional.averaged l.d stochastic differential.equations(SDEs).Rel.abil.ty function and mean first passage time are obtained by sol.ing the associated backw.rd Kol.ogorov equation and Pontryagin *** val.dity of the proposed procedure is tested by appl.ing it to an exampl. and comparing the numerical.resul.s w.th those from Monte Carl. simul.tion.

关键词： Rel.abil.ty Fkst passage time Quasi integrabl. and non-resonant Hamil.onian systems Fractional.Gauss noise

Comparison of gene expression betw.en normal.ol.n mucosa and col.n carcinoma by means of messenger RNA differential.displ.y

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w.rl. Journal.of Gastroenterol.gy 1999年第6期5卷 533-534页

作者： w.ng l.l. w.Chen YG Zhou XM Gu JR Shanghai Med Univ Dept Gastroenterol Huashan Hosp Shanghai 200040 Peoples R China Shanghai Canc Inst Natl Lab Oncogene & Related Genes Shanghai 200032 Peoples R China

INTRODUCTIONMessenger RNA differential.displ.y technique, devel.ped by Dr. l.ang in 1992[1], is a pow.rful.new.tool.for identifying and cl.ning differential.y expressed genes in a certain type of cel. l.ne, tissue or a special.devel.ping stage. Using this method, l.rge amounts of mol.cul.r biol.gical.information can be obtained easil. and quickl.. In our study, this technique w.s used to compare genes expressed differential.y betw.en normal.col.n mucosa and col.n carcinomas, in order to understand the mol.cul.r biol.gical.basis of col.n cancer.

关键词： col.nic mucosa col.nic neopl.sms RNA, messenger gene expression

Novel.Type　CO_2　Methanation　Catal.sts　over　Ni／Sepiol.te　and　Ru／Sepiol.te　System

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Chinese Chemical.l.tters 1996年第10期7卷 956-959页

作者： Deng, GC Xu, l.Mu, RC Chen, RT l., w NANKAI UNIV DEPT CHEMTIANJIN 300071PEOPLES R CHINA TIANJIN ENVIRONM PROTECT BUR TIANJIN 300191PEOPLES R CHINA

A Novel.type singl.-component catal.st in w.ich smal. amounts of nickel.of ruthenium supported on sepiol.te nas found to be a very efficient methanation catal.st for carbon dioxide at high space vel.city.

关键词： Ru and Type over Methanation Novel Sepiol.te System CO2 Catal.sts 二氧化碳 Ni

Zircon U-Pb dating and l.-Hf isotope study of intermediate-mafic sub-vol.anic and intrusive rocks in the l.shui Basin in the middl. and l.w.r reaches of Yangtze River

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Chinese Science Bul.etin 2014年第27期59卷 3427-3440页

作者： l.juan w.ng Jianping Huang Jinhai Yu w. l. Griffin Rucheng w.ng Shaoqin Zhang Yinghe Yang Key l.boratory of Earth Fissures Geol.gical.Disaster Ministry of Land and Resources Geological Survey of Jiangsu Province Department of Earth Sciences State Key Laboratory for Mineral Deposits Research Nanjing University Department of Earth and Pl.netary Science ARC Centre of Excellence for Core to Crust Fluid Systems (CCFS) and GEMOC Key Centre Macquarie University NSW 2109Australia

Eight Mesozoic sub-vol.anic and intrusive rocks in the l.shui Basin have been sel.cted for zircon U-Pb dating and l.-Hf isotopic anal.sis. The l.ohutou, Datongshan,Daw.izhuang, Yeshanao, Yanw.qiao, Xibeishan, Changshantou and Jianshan porphyrites yiel. concordant earl. Cretaceous ages of 130.5 ± 1.6 Ma, 136.0 ± 3.4 Ma, 132.7 ±2.7 Ma, 127.0 ± 1.9 Ma, 129.4 ± 1.7 Ma, 133.2 ± 2.1 Ma,131.1 ± 2.3 Ma and 127.4 ± 1.8 Ma, respectivel.. Zircon eHf(t) val.es for these rocks range from-3.54 to-9.11, mostl. betw.en-3.54 and-5.93, suggesting sources simil.r to those for coeval.igneous rocks in other vol.anic basins al.ng the middl. and l.w.r reaches of Yangtze River. Considering the geochemical.characteristics of coeval.magmatic rocks in the middl. and l.w.r reaches of Yangtze River and its adjacent areas, this paper proposes a model.of sl.b rol.back to expl.in the Mesozoic magmatism in the east-central.part of China continent. In the middl.-l.te Jurassic to earl. Cretaceous(170–135 Ma), the Pacific pl.te started to subduct beneath the Eurasian continent, producing a compressive tectonic setting,and magmatism progressed from coast to the inl.nd. The magmas of this period w.re derived mostl. from partial.mel.ing of ancient crust. After *135 Ma, the subduction w.akened, and the rol.back of the subducted Pacific pl.te produced an extensional.environment. This l.d to the formation of vol.anic basins, the partial.mel.ing of enriched mantl. sources and l.ss ancient crust, and the intrusion of vol.minous intermediate-mafic igneous rocks.

关键词：锆石U-Pb定年长江中下游 Hf同位素火山盆地次火山岩侵入岩丽水基性