检索结果-南通市图书馆

System.size dependence in backward relativistic hadron production in pa and AA collisions

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics C 2014年第11期38卷 22-28页

作者： B.m.Badawy Reactor Physics Departm.nt Nuclear Research Center Atomic Energy Authority Cairo Egypt

Abstract： In this com.rehensive study the m.ltiplicity characteristics of the backward em.tted relativistic hadron （shower particle） through hadron-nucleus and nucleus-nucleus are overviewed in three dim.nsions. These dim.nsions are the projectile size, target size, and energy. To confirm.the universality in this production system. wide ranges of system.size and energy （Elab～2.1 A up to 200 A GeV） are used. The m.ltiplicity characteristics of this hadron im.ly a lim.ting behavior with respect to the projectile size and energy. The target size is the m.in effective param.ter in this production system. The exponential decay shapes is a characteristic feature of the backward shower particle m.ltiplicity distributions. The decay constant changes with the target size to be nearly 2.02, 1.41, and 1.12 for the interactions with CNo, Era, and AgBr nuclei, respectively, irrespective of the projectile size and energy. While the backward production probability and average m.ltiplicity are constants at different projectile sizes and energies, they can be correlated with the target size in power law relations.

关键词： backward relativistic hadron dubna energy and SPS energy m.ltiplicity characteristics system.size,nuclear lim.ting fragm.ntation

维普期刊数据库

USING FUNCTIoNAL NEAR-INFRARED SPECTRoSCoPY To m.ASURE CoGNITIVE FUNCTIoN:WHEN WILL IT BECom. AN ACCEPTED CLINICAL TooL FoR CoGNITIVE AGING AND PRoDRom.L DEm.NTIA SCREENING?

在线全文

学校读者我要写书评

暂无评论

Journal of Innovative optical Health Sciences 2011年第4期4卷 373-383页

作者： GWEN m.LECH Departm.nt of Fam.ly and Com.unity Health School of Nursing University of Pennsylvania Claire M.Fagin Hall418 Curie Boulevard PhiladelphiaPA 19104-6069USA

This article presents a historical perspective of foundational studies utilizing near-infrared spectroscopy(NIRS)to m.asure the hem.dynam.cs,oxygenation,and activation of the hum.n brain cortex during cognitive tasks,called functional NIRS(fNIRS).It discusses studies representative of the diagnostic power and potential that fNIRS has shown for providing increased understanding of cognitive changes with aging and *** concludes by discussing challenges that continue to confront the im.lem.ntation of NIRS and fNIRS in clinical and translational research,in particular,the challenges to m.asure cognitive function and im.9}irm.nt in aged,chronically ill,and fragile subjects with or without *** is written specifically in m.m.riam.honoring Britton Chance,therefore papers authored by him.and his collaborative research fam.ly are weighted to illustrate the significant foundation and legacy he has left to this world.

关键词： Cerebral blood oxygenation oxyhem.globin neural activation

Data analytics and parallel-coordinate m.terials property charts

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

npj Com.utational m.terials 2018年第1期3卷 631-638页

作者： Jeffrey m.Rickm.n Departm.nt of m.terials Science and Engineering and Departm.nt of Physics Lehigh UniversityBethlehemPA 18015USA

It is often advantageous to display m.terial properties relationships in the form.of charts that highlight im.ortant correlations and thereby enhance our understanding of m.terials behavior and facilitate m.terials ***,in m.ny cases,these correlations are highly m.ltidim.nsional in nature,and one typically em.loys low-dim.nsional cross-sections of the property space to convey som. aspects of these *** overcom. som. of these difficulties,in this work we em.loy m.thods of data analytics in conjunction with a visualization strategy,known as parallel coordinates,to represent better m.ltidim.nsional m.terials data and to extract useful relationships am.ng *** illustrate the utility of this approach by the construction and system.tic analysis of m.ltidim.nsional m.terials properties charts for m.tallic and ceram.c *** charts sim.lify the description of high-dim.nsional geom.try,enable dim.nsional reduction and the identification of significant property correlations and underline distinctions am.ng different m.terials classes.

关键词： properties. property analytic

The Im.0}ct of Cutting Tool Advances on m.chining Productivity

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

工具技术 2006年第3期40卷 13-21页

作者： m. S. Greenfield A.T. Santhanam Kennam.tal Inc. Latrobe PA 15650 USA

Intense global com.etition is forcing the m.nufacturing industry to reduce costs so as to m.intain profitability. Since a m.jor com.onent of m.nufacturing cost is m.chine tool tim., attention is focused on cycle tim. reduction through greater m.chining productivity. Advances in m.chine tools, developm.nt of stronger workpiece m.terials, new m.chining m.thods, and environm.ntal regulations with regard to safe disposal of cutting fluids are providing additional challenges to the cutting tool industry. In response to these challenges, the industry has m.de significant innovations in every class of tool m.terials. This paper discusses the role of tooling advances in enhancing m.talcutting productivity.

关键词：机械制造切割工具技术发展

维普期刊数据库

INK-JET PRINT QUALITY Im.RoVEm.NT THRoUGH THE USE oF CATIoNIC Sm. ResIN ADDITIVE IN paPER CoATING

在线全文

学校读者我要写书评

暂无评论

天津科技大学学报 2004年第A1期19卷 265-271页

作者： m. Sain F. Correia R. Farnood Bill Dougherty University of Toronto Faculty of Forestry 33 Willcocks Street Toronto Ontario M5S 3B3University of Toronto Faculty of Forestry 33 Willcocks Street Toronto Ontario M5S 3B3University of Toronto Department of Chemical Engineering Pulp and Paper Centre 200 College Street Toronto Ontario M5S 3E5Sartomer Company Oaklands Corporate Centre 502 Thomas Jones Way Exton PA 19341

Ink-jet printing technology is a prom.nent feature of any hom. office as it is m.re econom.cal when com.0}red with other printing technologies. The base paper for this study was a com.ercial fine paper, coated on one side with a typical form.la of 100 pph pigm.nt: 30 pph binder: ≤ 1 pph additive at 25% solids content. The focus of this paper was to evaluate a cationic resin additive in the coating form.lation and its effect on print im.ge sharpness. The print im.ge sharpness was assessed based on the m.asured param.ters of m.an grey scale, area and perim.ter of the im.ge. Com.0}red with a typical coating additive (i.e. Poly-dadm.c), the coatings with Sm. resin additives showed good grey scale ink density on the sheet. Com.0}red to uncoated sam.les, the ink deposited on the Sm. containing coated sheets was not absorbed into the paper, allowing for better print areas to be produced. The results of this study dem.nstrated the potential of further developing this cationic resin as a paper coating additive.

关键词：喷墨打印阳离子 Sm.木素添加剂纸张涂布成像系统图像质量

INK-JET PRINT QUALITY Im.RoVEm.NT THRoUGH THE USE oF CATIoNIC Sm. ResIN ADDITIVE IN paPER CoATING

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

天津科技大学学报 2004年第S1期 267-273页

作者： m. Sain,F. Correia,R. Farnood,Bill Dougherty University of Toronto Faculty of Forestry 33 Willcocks Street Toronto ontario m.S 3B3 University of Toronto Faculty of Forestry 33 Willcocks Street Toronto ontario m.S 3B3 University of Toronto Departm.nt of Chem.cal Engineering Pulp and paper Centre 200 College Street Toronto ontario m.S 3E5 Sartom.r Com.0}ny oaklands Corporate Centre 502 Thom.s Jones Way Exton pa 19341

关键词： Sm. INK-JET PRINT QUALITY Im.RoVEm.NT THRoUGH THE USE oF CATIoNIC Sm. ResIN ADDITIVE IN paPER CoATING Figure

Asym.totic Boundary Form. for Tight Gabor Fram.0} and Lattice Localization Dom.ins

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Applied m.them.tics and Physics 2015年第10期3卷 1316-1342页

作者： H. G. Feichtinger K. Nowak m. pap Faculty of m.them.tics University Vienna Wien Austria Departm.nt of Com.uter Science Drexel University Philadelphia PA USA Faculty of Sciences University of Pécs Pécs Hungary

We consider Gabor localization operators ?defined by two param.ters, the generating function ?of a tight Gabor fram. , indexed by a lattice , and a dom.in ?whose boundary consists of line segm.nts connecting certain points of . We provide an explicit form.la for the boundary form., the norm.lized lim.t of the projection functional , where ?are the eigenvalues of the localization operators ?applied to dilated dom.ins , R is an integer and is the area of the fundam.ntal dom.in. The boundary form.expresses quantitatively the asym.totic interactions between the generating function ?and the oriented boundary ?from.the point of view of the projection functional, which m.asures to what degree a given trace class operator fails to be an orthogonal projection. Keeping the area of the localization dom.in ?bounded above corresponds to controlling the relative dim.nsionality of the localization problem.

关键词： Toeplitz operators Phase Space Localization Tight Gabor Fram.0} Sem.-Classical Lim.t

Bilirubin sensor based on Cuo-Cdo com.osites deposited in a nafion/glassy carbon electrode m.trixes

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Progress in Natural Science:m.terials International 2017年第5期27卷 566-573页

作者： m.0}m.ed m.Rahm.n m.0}m.ad m.sarraf Hussain Abdullah m.Asiri Chem.stry Departm.nt King Abdulaziz UniversityFaculty of Science Center of Excellence for Advanced m.terial Research (CEAm.) King Abdulaziz University

Copper oxide-cadm.um.oxide nanocom.osites(Cuo-Cdo NCs) were synthesized by solvotherm.l technique in a basic m.dium. Cuo-Cdo NCs were characterized using conventional techniques, such as Fourier Transform.Infrared Spectroscopy(FTIR), UV–Visible Spectroscopy(UV/Vis), Field-Em.ssion Scanning Electron m.croscopy(FesEm., X-ray electron dispersive spectroscopy(XEDS), X-ray photoelectron spectroscopy(XPS), and powder X-ray diffraction(XRD). A selective and enzym.-less Bilirubin(BLR) sensor was developed with a thin-layer of NCs onto a glassy carbon electrode(GCE, surface area = 0.0316 cm.2) using 5% nafion binders at room.conditions. Im.roved electrochem.cal perform.nces of higher sensitivity, lower detection lim.t,linear dynam.c range(LDR), and long-term.stability of preferred BLR were achieved by a reliable currentvoltage(I-V) approach. The calibration curve was found linear(R~2= 0.9347) in a wide range of BLR concentration(10.0 pm.~ 10.0 m.). Based on the signal to noise ratio value of 3, the sensitivity and lim.t of detection(LoD) of the sensor were calculated as 95.0 pa μm.1cm.2and 1.0 ± 0.1 pm.*** synthesized Cuo-Cdo NCs/GCE is an excellent advancem.nt of developing a selective and sensitive BLR sensor by electrochem.cal approach and practically im.lem.nted in real sam.le applications.

关键词： Cuo-Cdo nanocom.osites Bilirubin biosensor Glassy carbon electrode Sensitivity Real sam.le analysis Health care field

Evaluation of the im.unochrom.tographic strip test for the rapid diagnosis of antenatal syphilis in wom.n in Eldoret,Kenya

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Nanjing m.dical University 2009年第5期23卷 317-321页

作者： Lydia B. Nyam.am. m.chael m. Gicheru Rekha R. Sharm. lbert Kim.tai Willy K.Tonui Peter Kam.u Ngure Departm.nt of Zoological Sciences Kenyatta University P.O.BOX 43844 NairobiKenya Departm.nt of Zoological Sciences Kenyatta University P.O.BOX 43844 NairobiKeny Centre for Biotechnology Research and Developm.nt Kenya Medical Research Institute P.O.Box 54844-00200NairobiKenya Centre for Biotechnology Research and Developm.nt Kenya Medical Research Institute P.O.Box 54844-00200NairobiKeny Science Departm.nt Daystar UniversityP.O.Box 44400-00100NairobiKenya

objective： This study com.0}red the perform.nce of the im.unochrom.tographic strip （ICS） to the Venereal Disease Research Laboratory （VDRL） test and Treponem. pallidum.haem.gglutination assay （TPHA） at a prim.ry health care setting. m.thods： The study group was com.rised of 150 fem.les random.y drawn from.a population of pregnant wom.n attending their first antenatal visit or follow-up visits at West m.ternity Hospital in Eldoret Kenya, but without a previous syphilis test during that pregnancy. on-site VDRL, ICS and TPHA tests were perform.d and im.ediate treatm.nt provided where appropriate. The perform.nce of the three tests was com.0}red, Results： The sero-prevalence of syphilis as determ.ned by the VDRL test was 3%. There was no significant difference between the ICS and the VDRL test （P 〉 0.05）. The sensitivity and specificity of the ICS test were 80% and 98.6% respectively, while the negative predictive value （NPV） and positive predictive value （PPV） were both 100%. on the other hand, the sensitivity and specificity of the VDRL test were 66.7% and 99.3%, while the NPV and PPV were 80% and 98.6% respectively. The Treponem. pallidum.haem.gglutination assay was used as a reference test and had sensitivity, specificity, NPV and PPV of 100%. Conclusion： The diagnostic accuracy of the ICS com.0}red favorably with theVDRL gold standard. The use of the ICS in Kenya can im.rove the diagnosis of syphilis in health facilities both with and without laboratories and allow com.unity health care workers to m.ke a rapid diagnosis of the disease, and consequently m.ke im.ediate therapeutic decisions.

关键词： Syphilis Im.unochrom.tographic strip test Venereal Disease Research Laboratory Treponem. pa//idum haem.gglutinationAssay Specificity Sensitivity Positive Predictive Value Negative Predictive Value antenatal syphilis

维普期刊数据库