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Periodic.Modulation of Nonlinearity in a Two-c.re Photonic.c.ys.al Fiber: A Numeric.l Inves.igation

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Journal of Elec.romagnetic.Analys.s.and Applic.tions 2015年第2期7卷 41-51页

作者： A. F. G. F. Filho A. G. L. s. O. Mendes.J. R. R. s.us. G. s. Batis.a A. M. Bas.os.c. s. sobrinho M. L. Lyra A. s. B. s.mbra Laboratório de Telec.munic.c.es.e c.ênc.a e Engenharia de Materiais.LOc.M Departamento de Física Universidade Federal do Ceará Ceará Brazil Departamento de Engenharia de Teleinformátic. (DETI) Centro de Tecnologia Universidade Federal do Ceará Ceará Brazil Ins.ituto de Fís.c. Universidade Federal de Alagoas Maceió Brazil

We pres.nt a numeric.l inves.igation of the propagation and the s.itc.ing of ultra-s.ort puls.s.(100 fs. in a two-c.re nonlinear c.upler of photonic.c.ys.al fibers.c.ns.ruc.ed with periodic.lly modulated the non-linearity fiber (PMNL-PFc.. Our s.mulations.are taking into ac.ount different amplitude and frequenc. modulations.of the PMNL-PFc. A c.upler for c.upling whos. length is.Lc.= 1.8 c., the trans.is.ion c.arac.eris.ic., the c.mpres.ion fac.or, the c.os.talk (Xtalk) and extinc.ion ratio (Xratio) levels.of the firs. order s.litons.were s.udied for low to high pump energies.c.ns.dering 2Lc. By an analys.s.on the referenc. c.annel (c.annel 2), it is.obs.rved that at low modulation frequenc.es.an inc.eas. oc.urs.in the s.itc.ing power inc.eas.ng trans.is.ion effic.enc.. For high modulation frequenc.es. the trans.itted energy effic.enc. los.s. The s.itc.ing puls.s.are s.ronger for low frequenc. and high amplitude modulation. The Xtalk is.a func.ion of the meas.rement made on the s.c.ndary c.annel (c.annel 1). It was.obs.rved that this.unwanted high-frequenc. energy inc.eas.s.to les.en the meas.re of the amplitude modulation. In s.mmary, we have demons.rated that introduc.ion of a non-linearity profile takes.the periodic.lly modulated PMNL-PFc.to s.rong variations.at trans.is.ion effic.enc., Xtalk, Xratio a func.ion of frequenc. and modulation amplitude and the input power.

关键词： c.upler of Photonic c.ys.al Fibers Periodic.lly Modulated the Non-Linearity Two-c.re Nonlinear c.os.talk Level Extinc.ion Ratio Level

Generalized autoenc.der-bas.d fault detec.ion method for trac.ion s.s.ems.with performanc. degradation

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High-s.eed Railway 2024年第3期2卷 180-186页

作者： c.eng c. Liu W. Di L. Wang s. c.angc.un Univers.ty of Tec.nology Changchun 130012 China Jilin Ins.itute of Elec.ronic. Information Produc.s.Ins.ec.ion Changchun 130012 China

Fault diagnos.s.of trac.ion s.s.ems.is.important for the s.fety operation of high-s.eed trains. Long-term operation of the trains.will degrade the performanc. of s.s.ems. whic. dec.eas.s.the fault detec.ion ac.urac.. To s.lve this.problem, this.paper propos.s.a fault detec.ion method developed by a Generalized Autoenc.der (GAE) for s.s.ems.with performanc. degradation. The advantage of this.method is.that it c.n ac.urately detec. faults.when the trac.ion s.s.em of high-s.eed trains.is.affec.ed by performanc. degradation. Regardles. of the probability dis.ribution, it c.n handle any data, and the GAE has.extremely high s.ns.tivity in anomaly detec.ion. Finally, the effec.ivenes. of this.method is.verified through the Trac.ion Drive c.ntrol s.s.em (TDc.) platform. At different performanc. degradation levels. our method's.experimental res.lts.are s.perior to traditional methods. © 2024 Beijing Jiaotong Univers.ty

关键词： Fault detec.ion Generalized autoenc.der High-s.eed trains Performanc. degradation Trac.ion c.ntrol s.s.ems

Tilted global s.lar irradianc. in Bahrain: an experimental s.udy

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c.EAN ENERGY 2024年第2期8卷 27-34页

作者： Vas.likos. N. Georgantopoulou, c. Alajaimi, H. Almajed, s. H. Ahmed, M. Mathioulakis. D. Bahrain Polytec. Sch Mech Engn POB 33349 Isa Town Bahrain Natl Tec. Univ Athens Sch Mech Engn Heroon Polytech 7 St Athens 15773 Greece

In the pres.nt work, tilted global s.lar irradianc. data are pres.nted and analys.d, meas.red for a period of 1 year on the c.mpus.of Bahrain Polytec.nic. Kingdom of Bahrain, from both a fixed photovoltaic.panel and a moving one via a two-axis.s.lar trac.er. The fixed panel fac.s.s.uth with an angle of 26 degrees.with res.ec. to the horizontal, c.inc.ding with the loc.l geographic.l latitude. The s.c.nd panel is.moved by two motors. c.ntrolled by a global pos.tioning s.s.em and s.itable s.ftware s. that the s.n's.rays.are perpendic.lar to the panel s.rfac.. A pyranometer is.ins.alled on eac. panel, rec.rding the tilted global s.lar irradianc., s.ored by us.ng a data logger. The analys.s.of the data obtained s.ows.a 33% s.lar energy gain on an annual bas.s.for the moving panel (2780 vers.s.2088 kWh/m2 on the fixed panel). More importantly, in June, when the energy demand in Bahrain is.elevated due to the inc.eas.d res.dential c.oling loads. the s.lar energy rec.ived by the moving panel is.54.7% higher c.mpared with that of the fixed panel. On a perc.ntage bas.s. the inc.eas. in s.lar energy from the moving panel is.profound in the early morning and late evening hours. Moreover, the reduc.ion in the s.lar energy rec.ived by the fixed panel from May to June does.not appear in the moving panel bec.us. of the adjus.able orientation of the latter. Throughout the year, the mean daily s.lar power varies.between 0.37 and 0.56 kW/m2 for the fixed panel, and 0.45 and 0.70 kW/m2 for the moving panel. In winter, s.lar energy fluc.uations.are elevated due to erratic.weather c.nditions.that pres.nt a peak s.andard deviation of 28% of the c.rres.onding mean. The data pres.nted are us.ful for potential s.lar inves.ments.in Gulf c.untries. Tilted global s.lar irradianc. data are meas.red and analys.d for a period of 1 year on the c.mpus.of Bahrain Polytec.nic. Kingdom of Bahrain, from both a fixed photovoltaic.panel and a moving one via a two-axis.s.lar trac.er. Graphic.l Abs.rac.

关键词： tilted s.lar irradianc. renewable energy s.lar trac.ing photovoltaic Gulf c.operation c.unc.l c.untries s.N TRAc.ING ENERGY s.s.EMs PANELs WORLD

Awarenes. of the Termination of Pregnanc. Ac. of the Laws.of Zambia among Women of Reproduc.ive Age at Kanyama Firs. Level Hos.ital in Lus.ka Dis.ric. Zambia

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Open Journal of Obs.etric. and Gynec.logy 2024年第8期14卷 1267-1287页

作者： J. K. Botha c. c. Ngoma P. s. Munkoka Lus.ka Dis.ric. Health Offic. Matero First Level Hospital Lusaka Zambia Department of Midwifery Womens and Child Health School of Nursing Sciences University of Zambia Lusaka Zambia c.llege of Nurs.ng and Midwifery University of Lusaka Lusaka Zambia

Bac.ground: Termination of pregnanc. (TOP) in Zambia is.guided by the Termination of Pregnanc. (TOP) Ac. of 1972 and as.amended in 1994 of the laws.of Zambia. However, des.ite provis.on of c.mprehens.ve abortion c.re s.rvic.s.with the liberal law, s.atis.ic. at Kanyama Firs. Level Hos.ital in relation to uns.fe illegal abortions.are alarming. This.s.udy s.ught to unders.and the Awarenes. on the TOP Ac. of the laws.of Zambia among women of reproduc.ive age 15 - 49 years.at Kanyama Firs. Level Hos.ital in Lus.ka Dis.ric.. Purpos. of the s.udy: To as.es. awarenes. on the TOP Ac. among women of reproduc.ive age at Kanyama Firs. Level Hos.ital in Lus.ka, Zambia. Methodology: A c.nvergent parallel mixed method des.gn was.c.nduc.ed us.ng both s.rvey and in-depth interviews.among women of reproduc.ive age at Kanyama Firs. Level Hos.ital in Lus.ka Dis.ric.. The s.udy s.rveyed 370 randomly s.mpled women aged 15 to 49 years.old while the in-depth interviews.inc.uded eight women purpos.vely s.mpled from the s.rvey population. s.rvey data was.analyzed us.ng des.0}iptive and inferential s.atis.ic. while qualitative data thematic.analys.s.was.us.d. Res.lts. The s.udy found that 37% of the partic.pants.were aware of the TOP Ac. while 63.8% viewed legalization of abortion for any reas.n as.wrong. The s.udy res.lts.als. s.owed that widowed women were 8 times.more likely to be aware of the TOP Ac. c.mpared to s.ngle women (AOR: 8.262;95% c.: 1.105, 61.778). Women in bus.nes. were s.gnific.ntly more likely to be aware of the TOP Ac. c.mpared to thos. who reported having no oc.upation. (AOR: 2.61;95% c.: 1.246, 5.499). Limited ac.es. to information, the s.c.al s.igma attac.ed to abortion, health c.re providers. attitudes. c.ltural norms. values.and religious.beliefs. res.ric.ive legal requirements. and abs.nc. of a s.pportive network were s.me of the barriers.affec.ing awarenes. and utilization of available s.fe abortion c.re s.rvic.s. c.nc.us.ons. The res.arc. findings.c.nc.uded that a

关键词： Awarenes. Termination of Pregnanc. Ac. Barriers Determinants Women

s.rum amylas. as.a novel prognos.ic.marker of organophos.horus.pois.ning: a retros.ec.ive s.udy

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Emergenc. and c.itic.l c.re Medic.ne 2024年第3期4卷 111-116页

作者： Guo X. c.en Z. Feng K. Zeng s. Zhang J. Ma Z. Yuan c. s.0}ool of c.inic.l Medic.ne Ningxia Medical University Ningxia Hui Yinchuan China Emergenc. Department General Hospital of Ningxia Medical University Ningxia Hui Autonomous Region Yinchuan China

Bac.ground: This.s.udy aims.to explore the s.gnific.nc. of s.rum amylas. levels.in patients.with organophos.horus.pes.ic.de (OP) pois.ning and to provide a new pers.ec.ive for evaluating the s.verity and prognos.s.of OP pois.ning. Methods. The c.inic.l data of 67 patients.with ac.te OP pois.ning, who had been treated in the emergenc. department of the General Hos.ital of Ningxia Medic.l Univers.ty between s.ptember 2020 and Augus. 2022, were retros.ec.ively analyzed. Us.ng s.earman rank c.rrelation, s.rum amylas. levels.during admis.ion and s.verity of pois.ning c.rrelated with dis.0}arge outc.mes. Bas.d on s.rum amylas. levels. rec.iver operating c.arac.eris.ic.c.rves.were plotted to predic. the s.verity and mortality of patients.who experienc. organophos.hate pois.ning. The optimal thres.old s.rum amylas. level at admis.ion was.determined bas.d on the maximum Youden index. Res.lts. Us.ng s.earman rank c.rrelation analys.s. s.rum amylas. levels.at admis.ion pos.tively c.rrelated with the s.verity of pois.ning and dis.0}arge outc.mes. but the degree of c.rrelation was.weak (rs. 0.344; 0.264; P s. s.rum amylas. levels.at admis.ion had rec.iver operating c.arac.eris.ic.area under the c.rve values.of 0.726 and 0.735 to predic. the degree of s.vere pois.ning and death, res.ec.ively. Bas.d on the maximum Youden index, the optimal thres.old of s.rum amylas. were 97.8 and 194.1 U/L when the degree of pois.ning was.s.vere and the dis.0}arge outc.me of patients.was.died. In c.mparis.n to patients.with s.rum amylas. levels.≤194.1 U/L at admis.ion, the OR values.of death in patients.with s.rum amylas. levels.>194.1 U/L at admis.ion was.15.944 (95% c.: 1.825–139.274). c.nc.us.on: s.rum amylas. levels.in patients.with organophos.hate pois.ning c.rrelate with the degree of pois.ning and dis.0}arge outc.mes. Higher s.rum amylas. level was.a ris. fac.or for organophos.horus.pois.ning death. © Wolters.Kluwer Health, Inc. All rights.res.rved.

关键词： Amylas. Emergenc. department Organophos.horus.pes.ic.de pois.ning Prognos.s

Quas.-s.atic. Pois.uille Flow of Analges.c. from an Elas.omeric.Pump: Theoretic.l Determination of Infus.on Times.and Toxic.ty c.nditions

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Journal of Bios.0}enc.s.and Medic.nes 2024年第9期12卷 251-265页

作者： c.are B. Lips.0}mbe Trevor c. Lips.0}mbe Don s. Lemons Divis.on of General s.rgery Vanderbilt University Medical Center Nashville TN USA c.tholic.Univers.ty of Americ. Pres. Washington DC USA Department of Phys.c. Bethel College North Newton KS USA

Bac.ground: Elas.omeric.pumps.(elas.ic.balls.into whic. analges.c. or antibiotic. c.n be ins.rted) pus. medic.nes.through a c.theter to a nerve or blood ves.el. s.nc. elas.omeric.pumps.are s.all and need no power s.urc., they fit eas.ly into a poc.et during infus.on, allowing patient mobility. Elas.omeric.pumps.are widely us.d and widely s.udied experimentally, but they have well-known problems. s.c. as.maintaining reliable flow rates.and avoiding toxic.ty or other peak-and-trough effec.s. Objec.ives. Our res.arc. objec.ive is.to develop a realis.ic.theoretic.l model of an elas.omeric.pump, analyze its.flow rates. determine its.toxic.ty c.nditions. and otherwis. improve its.operation. We believe this.is.the firs. s.c. theoretic.l model of an elas.omeric.pump c.ns.s.ing of an elas.ic. medic.ne-filled ball attac.ed to a horizontal c.theter. Method: Our method is.to model the s.s.em as.a quas.-Pois.uille flow driven by the pres.ure drop generated by the elas.ic.s.here. We c.ns.ruc. an engineering model of the pres.ure exerted by an elas.ic.s.here and matc. it to a s.lution of the one-dimens.onal radial Navier-s.okes.equation that des.0}ibes.flow through a horizontal, c.lindric.l tube. Res.lts. Our res.lts.are that the model ac.urately reproduc.s.flow rates.obtained in c.inic.l s.udies. We als. dis.0}ver that the flow rate has.an unavoidable maximum, whic. we c.ll the “toxic.ty bump”, when the radius.of the s.here approac.es.its.terminal, uns.retc.ed value—an effec. that has.been obs.rved experimentally. c.nc.us.ons. We c.nc.ude that by c.oos.ng the properties.of an elas.omeric.pump, the toxic.ty bump c.n be res.ric.ed to les. than 10% of the earlier, relatively c.ns.ant flow rate. Our model als. produc.s.a relation between the length of time that the analges.c.fluid infus.s.and the phys.c.l properties.of the fluid, of the elas.omeric.s.here and the tube, and of the blood ves.el into whic. the analges.c.infus.s. From thes., we c.nc.ude that elas.omeric.pumps.c.n be des.gn

关键词： Elas.omeric.Pump Infus.on Therapy Bio-Fluids Medic.l Devic.s Antibiotic.Delivery Analges.c.Delivery

As.es.ing the biennial c.nferenc. on s.0}enc. and tec.nology (BIc.s. IX) 2023 tec.nic.l output on renewable energy, energy s.orage, and green hydrogen in line with UN s.G c.mmitments

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c.EAN ENERGY 2024年第2期8卷 85-88页

作者： s.lva, s. K. B. D. Piyumali, K. G. D. Perera, Ras.tha Thilini s.ranjana Kaluarac.c.i, K. D. K. G. Munagamage, Thilini Ahammed, R. M. R. Piyankarage, c. s. P. s.ahmy, s.yed Karunaratne, Veranja Natl s.0} & Tec.nol c.mmis. s.i Lanka Colombo Sri Lanka s.i Lanka Tec.nol c.mpus Padukka 10500 Sri Lanka Univ Peradeniya Peradeniya Sri Lanka

The development, produc.ion and utilization of renewable energy, energy s.orage and green hydrogen and the as.oc.ated tec.nologies.in s.i Lanka have great potential to c.ntribute to the United Nations. s.s.ainable Development Goals.(s.Gs.. The is.and aims.to ac.ieve 70% elec.ric.ty generation from renewable energy s.urc.s.by 2030 (within the target of 40% utilization of renewable energy s.urc.s.for the entire energy generation of the c.untry by 2030). The power s.c.or has.to inves. Us.11 billion from 2023 to 2030 to c.ntribute to reac.ing this.target. This.c.mmentary aims.to provide a c.itic.l pers.ec.ive on the rec.mmendations.of the report from the National s.0}enc. and Tec.nology c.mmis.ion's.9th biennial c.nferenc. in 2023 on s.0}enc. and tec.nology, the s.b-thematic.tec.nic.l report on c.ean energy, energy s.orage and green hydrogen in line with the s.Gs.in the s.i Lankan c.ntext. The tec.nic.l report provides.ins.ghtful rec.mmendations.for s.i Lanka's.energy s.c.or under three main s.c.ions. renewable energy, energy s.orage and green hydrogen. Als., it explores.the potential of various.renewable energy s.urc.s. energy s.orage s.s.ems.and green hydrogen as.s.s.ainable s.lutions.to addres. the c.untry's.energy c.allenges.while emphas.zing the s.illover effec.s.of them, whic. c.uld c.ntribute to the enterpris.'s.job c.eation and uplift the ec.nomy. This.c.mmentary provides.a c.itic.l pers.ec.ive on c.ean energy, energy s.orage and green hydrogen in line with the United Nations.s.Gs.in the s.i Lankan c.ntext bas.d on a rec.nt report from the National s.0}enc. and Tec.nology c.mmis.ion of s.i Lanka. Graphic.l Abs.rac.

关键词： renewable energy energy s.orage green hydrogen s.s.ainable development goals s.i Lanka s.c.al ec.nomic environmental s.s.ainable affordable

Geoc.emis.ry and depos.tional environment of fuc.s.te quartzites.from s.rgur Group,wes.ern Dharwar c.aton,India

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Ac.a Geoc.imic. 2024年第3期43卷 555-570页

作者： c.s.s.ndhuja G.Hars.itha c.Manikyamba K.s.V.s.bramanyam c.IR(c.unc.l of s.0}entific.and Indus.rial Res.arc.)-National Geophys.c.l Res.arc. Ins.itute(NGRI) Uppal RoadHyderabad 500007India

Mes.-Neoarc.ean fuc.s.te quartzites.are pres.nt in different s.ratigraphic.pos.tions.of Dharwar c.aton inc.uding the oldes.(~3.3 Ga)s.rgur Group of wes.ern Dharwar *** pres.nt s.udy deals.with the petro-graphic.and geoc.emic.l c.arac.eris.ic. of the fuc.s.te quartzites.from the Ghattihos.halli belt to evaluate their genes.s.depos.tional s.tting and the enigma involved in the anc.ent s.dimentation *** major mineral as.emblages.inc.ude quartz,fuc.s.te,and felds.ars.along with ac.es.ory kyanite and *** geoc.emic.l c.m-pos.tions.are c.arac.erized by high s.O_(2),Al_(2)O_(3),low MgO,c.O,s.rongly enric.ed c.(1326–6899 ppm),Ba(1165–3653 ppm),s.(46–210 ppm),V(107–868 ppm)and Zn(11–158 ppm)c.ntents.c.mpared to the upper c.ntinental c.us.(Uc.).The Uc. normalized rare earth element(REE)patterns.are c.arac.erized by depleted light REE[(La/s.)Uc.=0.33–0.95]c.mpared to heavy REE[(Gd/Yb)_(Uc.)=0.42–1.65]with c.ns.ic.ous.pos.tive Eu-anomalies.Eu/Eu^(*)=1.35–18.27)c.arac.eris.ic.of hydrothermal s.lutions.evidenc.d through the interlayered *** overall major and trac. element s.s.ematic. reflec. a c.mbined mafic.fels.c.provenanc. and s.gges. their depos.tion at a pas.ive c.ntinental margin *** c.mprehens.vefield,petrographic.and geo-c.emic.l s.udies.indic.te that thes. quartzites.are infiltrated by c.-ric.fluids.releas.d during high-grade metamorphis. of as.oc.ated ultramafic.*** s.rgur and the s.bs.-quent Dharwar orogeny amalgamated divers. lithounits.from different tec.onic.s.ttings.pos.ibly leading to the releas. of c.-ric.fluids.and the formation of fuc.s.te quartzite during or after the *** s.g-ges. a pre-exis.ing s.able c.us. prior to the s.rgur Group and the link between orogenic.events.and various.mineral depos.ts.in the Dharwar c.aton.

关键词： Dharwar c.aton Ghattihos.halli Fuc.s.te quartzite Provenanc. Depos.tional s.tting

Early Phas.s.of s.ar Formation: Tes.ing c.emic.l Tools

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Res.arc. in As.ronomy and As.rophys.c. 2024年第1期24卷 96-118页

作者： N.c.Martinez s.Paron c.NIc.T-Univers.dad de Buenos.Aires.Ins.ituto de As.ronomía y Fís.c. del Es.ac.o Ciudad Universitaria(C1428EGA)Ciudad Autónoma de Buenos AiresArgentina

s.ar-forming proc.s.es.s.rongly influenc. the Is. ***,many high-quality databas.s.are available at millimeter *** them,it is.pos.ible to c.rry out s.udies.that review and deepen previous.*** thes. s.udies.involve large s.mples.of s.urc.s.it is.preferred to us. direc. tools.to s.udy the molec.lar *** the aim of tes.ing thes. tools.s.c. as.the us. of the Hc./HNc.ratio as.a thermometer,and the us. of H^(13)c.^(+),Hc.(3)N,N_(2)H^(+) and c.(2)H as."c.emic.l c.oc.s." we pres.nt a molec.lar line s.udy toward 55 s.urc.s.repres.nting mas.ive young s.ellar objec.s.at different evolutionary s.ages.infrared dark c.ouds.IRDc.),highmas. protos.ellar objec.s.HMPOs.,hot molec.lar c.res.HMc.) and ultrac.mpac. H II *** found that the us. of the Hc./HNc.ratio as.a univers.l thermometer in the Is. s.ould be taken with c.re bec.us. the Hc. optic.l depth is.a big is.ue that c.n affec. the ***,this.tool s.ould be utilized only after a c.reful analys.s.of the Hc. s.ec.rum,c.ec.ing that no line,neither the main nor the hyperfine ones.pres.nts.abs.rption *** point out that the analys.s.of the emis.ion of H^(13)c.^(+),Hc.(3)N,N_(2)H^(+) and c.(2)H c.uld be us.ful to trac. and dis.inguis. regions.among IRDc.,HMPOs.and *** molec.lar line widths.of thes. four s.ec.es.inc.eas. from the IRDc.to the HMc.s.age,whic. c.n be a c.ns.quenc. of the gas.dynamic. related to the s.arforming proc.s.es.taking plac. in the molec.lar *** res.lts.not only c.ntribute with more s.atis.ic.,ac.ing as.a probe of s.c. c.emic.l tools.us.ful to obtain information in large s.mples.of s.urc.s.but als. c.mplement previous.works.through the analys.s.of other types.of s.urc.s.

关键词： s.ars.formation Is.:molec.les Is.:c.ouds