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Vasec.omy tec.niques-need for better oc.lusion methods

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Asian Journal of Andrology 2010年第3期12卷 442-443页

作者： David c. Sokal Behavioral and Biomedic.l Researc. Family Health International Research Triangle Park NC 27709 USA

I was disappointed to read about a devic. that was not suc.essful in produc.ng reliable vas oc.lusion in Amory et al. ＇s report in this issue of the journal [1]. For those who are unfamiliar with vasec.omy terminology, it is important to understand that a vasec.omy proc.dure has three major aspec.s：（1） anesthesia; （2） ac.essing or approac.ing the vas （that is, the method used to isolate a loop of the vas）; and （3） oc.luding the vas.

关键词： Vasec.omy oc.lusion methods

Stoc.astic.c.ntrast Measures for SAR Data: A Survey

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雷达学报（中英文） 2019年第6期8卷 758-781页

作者： Alejandro c.Frery La c.AN–Laboratório de c.mputa??o c.entífic. e Análise Numéric. Universidade Federal de Alagoas

“c.ntrast”is an generic.denomination for“differenc.”.Measures of c.ntrast are a powerful tool in image proc.ssing and analysis,e.g.,in denoising,edge detec.ion,segmentation,c.assific.tion,parameter estimation,c.ange detec.ion,and feature *** present a survey on tec.niques that aim at measuring the c.ntrast between(i)samples of SAR imagery,and(ii)samples and models,with emphasis on those that employ the statistic.l properties of the data.

关键词： c.ntrast Divergenc. Entropy Geodesic.distanc. Statistic. Synthetic.Aperture Radar(SAR)

A c.ass of sec.nd-order sliding mode c.ntroller for servo systems

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控制理论与应用（英文版） 2012年第2期10卷 268-272页

作者： Tom c. KONG Institute of Prec.sion Engineering The Chinese University of Hong Kong

Sliding mode c.ntrol （SMc. has been widely investigated in rec.nt years. In this paper, a c.ass of sec.nd- order SMc.is proposed and used to ac.ieve good trac.ing performanc. in servo systems. SMc.has good robustness to the disturbanc.s, but c.nventional SMc.uses a sign func.ion to drive the error on the sliding surfac., whic. c.uld generate c.attering effec.. In order to avoid this problem, our improved SMc.uses the integral of the sign func.ion. c.upled with an exponential reac.ing law, the new SMc.c.n better suppress torque disturbanc.s and c.atter, This paper first gives the derivation of the new SMc. Simulation and experimental results are then c.rried out to demonstrate its trac.ing performanc. and robustness against torque disturbanc. and c.atter.

关键词： Sliding mode c.ntrol (SMc. Servo system Position trac.ing Disturbanc. suppression

Numeric.l sensitivity analysis of welding-induc.d residual stress depending on variations in c.ntinuous c.oling transformation behavior

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Frontiers of Materials Sc.enc. 2011年第2期5卷 168-178页

作者： c. HEINZE c. Sc.WENK M. RETHMEIER J. c.RON Federal Institute for Materials Researc. and Testing Division 5.5 ＂Safety of Joined Components＂ Unter den Eichen 87 12205 Berlin Germany The Ohio State University Welding Engineering Program 1248 Arthur E. Adams Drive Columbus Ohio 43221 USA

The usage of c.ntinuous c.oling transformation （c.T） diagrams in numeric.l welding simulations is state of the art. Nevertheless, spec.fic.tions provide limits in c.emic.l c.mposition of materials whic. result in different c.T behavior and c.T diagrams, respec.ively. Therefore, it is nec.ssary to analyze the influenc. of variations in c.T diagrams on the developing residual stresses. In the present paper, four c.T diagrams and their effec. on numeric.l c.lc.lation of residual stresses are investigated for the widely used struc.ural steel S355J2 ＋ N welded by the gas metal arc.welding （GMAW） proc.ss. Rather than performing an arbitrary adjustment of c.T behavior, four justifiable data sets were used as input to the numeric.l c.lc.lation： data available in the Sysweld database, experimental data ac.uired through Gleeble dilatometry tests, and TTTIc.T predic.ions c.lc.lated from the JMatPro and Edison Welding Institute （EWI） Virtual Joining Portal software. The performed numeric.l analyses resulted in notic.able deviations in residual stresses c.nsidering the different c.T diagrams. Furthermore, possibilities to improve the predic.ion of distortions and residual stress based on c.T behavior are disc.ssed.

关键词： welding simulation GMAW c.T sensitivity welding residual stress

South　c.ina　Sea　Warm　Pool　in　Boreal　Spring

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Advanc.s in Atmospheric.Sc.enc.s 1997年第2期14卷 72-83页

作者： Peter c. c.u c. P. c.ang Naval Postgraduate Sc.ool 93943 Monterey CA USA

During the boreal spring of 1966, a warm-c.re eddy is identified in the upper South c.ina Sea (Sc.) west of the Philippines through an analysis of the U.S. Navy′s Master Oc.anographic.Observation Data Set. This eddy oc.urred before the development of the northern summer monsoon and disappeared afterward. We propose that this eddy is a result of the radiative warming during spring and the downwelling due to the antic.c.onic.forc.ng at the surfac.. Our hypothesis suggests an air-sea feedbac. sc.nario that may explain the development and withdrawal of the summer monsoon over the Sc.. The development phase of the warm-c.re eddy in this hypothesis is tested by using the Princ.ton Oc.an model.

关键词： Warm-c.re eddy Summer monsoon Downwelling South c.ina Sea

Influenc. of zone formation on stability of c.ntinuous fluidized bed layering granulation with external produc. c.assific.tion

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Partic.ology 2015年第6期13卷 1-7页

作者： c. Dreysc.ultze c. Neugebauer S. Palis A. Buc. E. Tsotsas S. Heinric. A. Kienle Otto yon Gueric.e University Universit~tsplatz 2 D-39106 Magdeburg Germany Max Planc. Institute for Dynamic. of c.mplex Tec.nic.l Systems Sandtorstraabe 1 D-39106 Magdeburg Germanyc Hamburg University of Tec.nology Denickestrae 15 D-21073 Hamburg Germany

c.ntinuous fluidized bed layering granulation with external produc. c.assific.tion and a sieve-mill c.c.e c.n show instability in the form of self-sustained nonlinear osc.llations of the partic.e size distribution. In the present study, the stability and bifurc.tion analysis of this proc.ss is presented. The underlying proc.ss models explic.tly ac.ount for c.mpartmentalization of the fluidized bed into a granulation and a drying zone, whic. is an important feature of many tec.nic.l proc.sses. Implic.tions for plant operations are disc.ssed with the help of stability diagrams as a func.ion of zone size, residenc. time within different zones, the addition of external seeds and partic.lar properties of the sieve-mill c.c.e.

关键词： Fluidized bed Granulation Population balanc. Stability Bifurc.tion

Drying of pasty and granular materials in mec.anic.lly and c.nventional spouted beds

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Partic.ology 2019年第1期17卷 176-183页

作者： Robson c. Sousa Maria c. Ferreira Haritz Altzibar Fábio B. Freire José T. Freire Rural and c.emic.l Engineering Department Federal University of Espirito SantoAlegreES. Brazil c.emic.l Engineering Department Federal University of Sao CarlosSao CarlosSPBrazil c.emic.l Engineering Department University of Basque CountryBilbaoSpain

A c.ntac.or vessel was built to operate as either a mec.anic.lly or a c.nventional spouted bed for the purpose of analyzing the drying of pasty and granular materials under c.mparable c.nditions in both c.nfigurations. A c.assic.l c.nic.l–c.lindric.l spouted bed with a 60° c.nic.l base and an air inlet c.ntral orific. was modified to enable the switc. by introduc.ng in the vessel’s c.nter an open helic.idal c.nveyor sc.ew plac.d above the air inlet orific.. This sc.ew is removable and c.nveniently returns the bed to its c.nventional spouted c.nfiguration. Experiments on drying solutions (c.lc.um c.rbonate suspensions and skimmed milk) and granular materials (porous alumina partic.es) were performed for various bed parameter settings. The spouting pressure drop, outlet air temperature, and relative humidity were measured over time under different c.nditions. Mec.anic.l agitation is proved effec.ive in drying diluted c.rbonate c.lc.um liquid suspensions and c.arse porous alumina partic.es at an air veloc.ty approximately 50% lower in c.mparison to drying in a c.nventional spouted bed. The c.nventional spouted bed performed better at drying liquid skimmed milk as the mec.anic.l agitation c.mbined with the axial inlet air flow is not effec.ive in mitigating stic.ing and powder agglomeration in the bed when handling pastes of c.mplex c.mposition. Introduc.ng mec.anic.l agitation in the designed setup broadens the operating range of a c.nventional spouted bed with axial air flow in the inlet.

关键词： c.arac.eristic c.rve Drying kinetic Spouted-bed dynamic. Mec.anic.l agitation Alumina partic.es Paste drying

Onc.genic.ty of viral hepatitis B and c.in the initiation of hepatic.c.nc.r stem c.lls

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Hepatoma Researc. 2019年第1期5卷 17-25页

作者： c.ec.lia H.c.Sukowati Peter A.c.Reyes Gianluc. Tell c.audio Tiribelli Fondazione Italiana Fegato Trieste 34149Italy Dipartimento di Area Medic. University of UdineUdine 33100Italy Hepatology Soc.ety of the Philippines Loyola Heights Quezon City 1108Philippines

c.ronic.infec.ion of hepatitis B virus(HBV)or/and hepatitis c.virus(Hc.)is one of major risk fac.ors in the development of the hepatoc.llular *** studies had shown the c.pac.ty of viral proteins in induc.ng the presenc. of the population of so-c.lled the c.nc.r stem c.lls(c.c..The integration of HBV S and X gene in the host genome indic.tes its direc. *** addition,the presenc. HBV and Hc. proteins were shown to modulate intrac.llular molec.lar pathways and epigenetic.*** review summarizes c.rrent literature regarding direc. onc.genic.properties of HBV and Hc. in the initiation of c.c.both in in vitro and in vivo studies.

关键词： c.nc.r stem c.lls hepatoc.llular c.rc.noma hepatitis B virus hepatitis c.virus

Molec.lar Frame Photoemission： Probe of the Photoionization Dynamic. for Molec.les in the Gas Phase

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c.inese Journal of c.emic.l Physic. 2009年第2期22卷 178-186页

作者： D. Dowek Y. J. Pic.rd P. Billaud c. Elkharrat J. c. Houver Université Paris-Sud 11 UMR 8625 Laboratoire des Collisions Atomiques et Moléculaires Bat. 351 Université Paris-Sud 91405 Orsay France c.RS UMR 8625 Laboratoire des Collisions Atomiques et Moléculaires Bat. 351 Université Paris-5ud 91405 Orsay France

Molec.lar frame photoemission is a very sensitive probe of the photoionization （PI） dynamic. of molec.les. This paper reports a c.mparative study of non-resonant and resonant photoionization of D2 induc.d by VUV c.rc.larly polarized sync.rotron radiation at SOLEIL at the level of the molec.lar frame photoelec.ron angular distributions （MFPADs）. We use the vec.or c.rrelation method whic. c.mbines imaging and time-of-flight resolved elec.ron-ion c.inc.denc. tec.niques, and a generalized formalism for the expression of the Ⅰ（χ, θe, Фe） MFPADs, where χ is the orientation of the molec.lar axis with respec. to the light quantization axis and （θe, Фe） the elec.ron emission direc.ion in the molec.lar frame. Selec.ed MFPADs for a molec.le aligned parallel or perpendic.lar to linearly polarized light, or perpendic.lar to the propagation axis of c.rc.larly polarized light, are presented for dissoc.ative photoionization （DPI） of D2 at two photon exc.tation energies, hv=19 eV, where direc. PI is the only c.annel opened, and hv=32.5 eV, i.e. in the region involving resonant exc.tation of Q1 and Q2 doubly exc.ted state series. We disc.ss in partic.lar the properties of the c.rc.lar dic.roism c.arac.erizing photoemission in the molec.lar frame for direc. and resonant PI. In the latter c.se, a remarkable behavior is observed whic. may be attributed to the interferenc. oc.urring between undistinguishable autoionization dec.y c.annels.

关键词： Dissoc.ative photoionization Molec.lar frame photoemission c.rc.lar dic.roism in photoemission Autoionization dynamic. Sync.rotron radiation Vec.or c.rrelation