检索结果-南通市图书馆

Optics a.d Photonics Journa. 2013年第5期3卷 13-23页

作者： rachel a. davies Ngee S. Chong Beng Gua. Ooi Depa.tment of Chemistry Middle Tennessee State University Murfreesboro USA

While Ra.a. spectroscopy is a.useful method for a.a.yzing ma.y orga.ic compounds, it is limited by rela.ively low sensitivity. Therefore, Surfa.e Enha.ced Ra.a. Spectroscopy (SERS) ba.ed on the a.sorption of orga.ic a.a.ytes onto gold or silver na.ostructures ha. been used to enha.ce the signa. of chemica.s presented a. very low concentra.ions. a.though the pla.monic effect of SERS ha. been shown to pla. a.la.ge role in signa. enha.cement, the significa.ce of the chemica. effect due to the a.a.yte chemisorption on the gold or silver surfa.e is less well understood. In this study, the role of a.iline substituents is exa.ined by probing the SERS intensities of va.ious a.ilines in silver a.d gold colloids using a.Ra.a. spectrometer with a. excita.ion wa.elength of 785 nm. The SERS enha.cement fa.tors a.d detection limits for a.iline a.d its mono- a.d di-substituted ortho deriva.ives a.e determined a.d compa.ed. Both the steric requirements of chemisorption a.d the inductive effects of electron-withdra.a. due to the substituents a.fect the signa. intensities of va.ious vibra.iona. modes of the a.ino group a.d the a.oma.ic ring. The degree of enha.cement is a.so rela.ed to the methods for prepa.ing the silver a.d gold colloids, which a.e cha.a.terized by probing the na.opa.ticle morphology a.d its degree of a.grega.ion using tra.smission electron microscopy (TEM).

关键词： SERS Ra.a. Enha.cement Fa.tors a.iline Deriva.ives Ortho-Substituent Na.opa.ticle TEM Cha.a.teriza.ion

Disa.ter a.a.eness a.d Prepa.edness a.ong Older a.ults in Ca.a.a.Rega.ding Floods, Wildfires, a.d Ea.thqua.es

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Interna.iona. Journa. of Disa.ter Risk Science 2024年第2期15卷 198-212页

作者： Eva.yna.Bogda. rachel Krueger Julie Wright Kyle Woods Sha.eree Cotta. School of a.ministra.ive Studies Disaster and Emergency Management ProgramYork UniversityTorontoOntario M3J 1P3Canada Depa.tment of Geogra.hy a.d Environmenta. Ma.a.ement University of WaterlooWaterlooOntario N2L 3G1Canada Pa.tners for a.tion Faculty of EnvironmentUniversity of WaterlooWaterlooOntario N2L 3G1Canada

Older a.ults a.e significa.tly impa.ted by na.ura. ha.a.ds a.d disa.ters tha. a.e exa.erba.ed by clima.e cha.ge. Understa.ding their a.a.eness a.d prepa.edness is essentia. for enha.cing disa.ter resilience. This study investiga.ed the a.titudes, a.tions, a.d recommenda.ions of older a.ults rega.ding na.ura. ha.a.ds tha. pose risks in their geogra.hic a.ea.specifica.ly floods, wildfires, a.d/or ea.thqua.es in Ca.a.a. Methods for this study included survey a.d focus groups with older a.ults(n = 161 a.d n = 10, respectively) a.d other high-risk groups from a.ross Ca.a.a. tha. a.e vulnera.le to these na.ura. ha.a.ds. The ma.n findings from this study a.e tha. current a.a.eness a.d prepa.edness a.ong older a.ults is low, though stronger perceptions of risks a.e a.socia.ed with risks specific to geogra.hic loca.ions where respondents live. Severa. ba.riers, such a. ha.a.d vulnera.ility misperceptions, cost-rela.ed rea.ons, a.d la.k of ha.a.d a.a.eness ha.e resulted in low a.a.eness a.d prepa.edness a.ong these popula.ions. The two ma.n recommenda.ions a.ising from this resea.ch a.e:(1) improve a.a.eness a.d prepa.edness with ta.lor-ma.e emergency prepa.edness ma.eria.s for older a.ults;a.d(2) a.opt community-ba.ed a.proa.hes to disa.ter prepa.edness through existing community groups to strengthen socia. connections with a.focus on loca.ly specific ha.a.ds. The findings from this resea.ch ca. be a.plied to other ha.a.ds, including hea.wa.es a.d pa.demics.

关键词： Ca.a.a Community-ba.ed disa.ter risk ma.a.ement Disa.ter a.a.eness a.d prepa.edness Disa.ter resilience Na.ura. ha.a.ds Older a.ults

Molecula. engineering binuclea. copper ca.a.ysts for selective CO_(2) reduction to C_(2) products

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journa. of Energy Chemistry 2024年第6期93卷 166-173,I0005页

作者： Qi Zha. Ka. Lei Ba. Yu Xia.rachel Crespo-Otero Devis Di Tomma.o Depa.tment of Chemistry School of Physical and Chemical SciencesQueen Mary University of LondonLondonE14NSUK Key La.ora.ory of Ma.eria. Chemistry for Energy Conversion a.d Stora.e(Ministry of Educa.ion) Hubei Key Laboratory of Material Chemistry and Service FailureState Key Laboratory of Materials Processing and Die&Mould TechnologySchool of Chemistry and Chemical EngineeringHuazhong University of Science and Technology(HUST)Wuhan 430074HubeiChina Depa.tment of Chemistry University College LondonLondonWC1H 0AJUK Digita. Environment Resea.ch Institute Queen Mary University of LondonEmpire HouseLondon E11HHUK

Molecula. copper ca.a.ysts serve a. exempla.y models for correla.ing the structure-rea.tion-mecha.ism rela.ionship in the electrochemica. CO_(2) reduction(eCO_(2)R),owing to their a.a.ta.le environments surrounding the copper meta. *** investiga.ion,employing density functiona. theory ca.cula.ions,focuses on a.novel fa.ily of binuclea. Cu molecula. *** modula.ion of their coordina.ion configura.ion through the introduction of orga.ic groups a.ms to a.sess their effica.y in converting CO_(2) to C_(2)*** findings highlight the crucia. role of chemica. va.ence sta.e in sha.ing the cha.a.teristics of binuclea. Cu ca.a.ysts,consequently influencing the eCO_(2)R beha.iour,Nota.ly,the Cu(Ⅱ)Cu(Ⅱ)ma.rocycle ca.a.yst exhibits enha.ced suppression of the hydrogen evolution rea.tion(HER),fa.ilita.ing proton tra.s fer a.d the eCO_(2)R *** rthermore,we explo re the impa.t of diverse electro n-withdra.ing a.d electron-dona.ing groups coordina.ed to the ma.rocycle(R=-F,-H,a.d-OCH_3)on the electron distribution in the molecula. *** pla.ement of-OCH_3 groups in the ma.rocycles lea.s to a.fa.oura.le oxida.ion sta.e of the Cu centres a.d subsequent C-C coupling to form C_(2) *** resea.ch provides funda.enta. insights into the design a.d optimiza.ion of binuclea. Cu molecula. ca.a.ysts for the electrochemica. conversion of CO_(2) to va.ue-a.ded C_(2) products.

关键词： Molecula. ca.a.yst design Selective CO_(2)reduction C_(2)products Density functiona. theory ca.cula.ions

Robust Ma.hine Lea.ning Ma.ping of sEMG Signa.s to Future a.tua.or Comma.ds in Biomecha.ronic Devices

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journa. of Bionic Engineering 2024年第1期21卷 270-287页

作者： a.i Na.r Sydney Bell rachel L.Whitta.er Cla.k R.Dickerson John McPhee Systems Design Engineering University of WaterlooWaterloo N2L 3G1Canada Kinesiology a.d Hea.th Sciences University of WaterlooWaterloo N2L3G3Canada

a.ma.hine lea.ning model for regression of interrupted Surfa.e Electromyogra.hy(sEMG)signa.s to future control-oriented signa.s(e.g.,robot’s joint a.gle a.d a.sistive torque)of a. a.tive biomecha.ronic device for high-level myoelectric-ba.ed hiera.chica. control is proposed.a.Recurrent Neura. Network(RNN)wa. tra.ned using output da.a.initia.ly obta.ned from offline optimiza.ion of the biomecha.ronic(huma.–robot)device a.d shifted by the prediction *** input of the RNN consisted of interrupted sEMG signa.s(to mimic signa. disconnections)a.d previous kinema.ic signa.s of the a.sistive *** RNN with a.0.1-s prediction horizon could predict the control-oriented joint a.gle a.d a.sistive torque with 92%a.d 86.5%regression a.cura.y,respectively,for the test *** proposed a.proa.h permits a.fa.t,predictive,a.d direct estima.ion of control-oriented signa.s instea. of a. itera.ive process tha. optimizes a.sistive torque in the inverse dyna.ic simula.ion of a.multibody huma.–robot *** with these interrupted input signa.s significa.tly improves the regression a.cura.y in the ca.e of sEMG signa. *** Robust Predictive Control-oriented Ma.hine Lea.ning(Robust-MuscleNET)model ca. support volitiona. high-level myoelectric-ba.ed control of biomecha.ronic devices,such a. exoskeletons,prostheses,a.d a.sistive/resistive *** work should study the a.plica.ion to prosthesis control a. well a. the repea.a.ility of the high-level controller with electrode *** low-level hiera.chica. controller tha. ma.a.es the huma.–robot intera.tion,the a.sista.ce/resista.ce stra.egy,a.d the a.tua.or coordina.ion should a.so be studied.

关键词： Myoelectric-ba.ed control-Surfa.e electromyogra.hy Ma.hine lea.ning Multibody system dyna.ics Exoskeleton Bionic

Etiology a.d ma.a.ement of urethra. ca.culi:a.systema.ic review of contempora.y series

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

a.ia. Journa. of Urology 2024年第1期11卷 10-18页

作者： a.drew Morton a.sa.a. Ta.iq Nigel Dunglison rachel Esler Ma.thew J.Roberts Fa.ulty of Medicine The University of QueenslandBrisbaneQueenslandAustralia Depa.tment of Urology Ipswich HospitalQueenslandAustralia Depa.tment of Urology Royal Brisbane and Women's HospitalQueenslandAustralia The University of Queensla.d Centre for Clinica. Resea.ch HerstonAustralia

Objective:To conduct a.systema.ic litera.ure review on urethra. ca.culi in a.contempora.y cohort describing etiology,investiga.ion,a.d ma.a.ement ***:a.systema.ic sea.ch of MEDLINE a.d Cochra.e Centra. Register of Controlled Tria.s(CENTRa.)da.a.a.es wa. ***,including ca.e reports a.d ca.e series on urethra. ca.culi published between Ja.ua.y 2000 a.d December 2019,were ***-text ma.uscripts were reviewed for clinica. pa.a.eters including symptoma.ology,etiology,medica. history,investiga.ions,trea.ment,a.d *** were colla.ed a.d a.a.yzed with univa.ia.e ***:Seventy-four publica.ions met inclusion criteria.reporting on 95 *** symptoms(41.1%),pa.n(40.0%),a.d a.ute urina.y retention(32.6%)were common presenting *** ca.culi were most often initia.ly investiga.ed using pla.n X-ra.(63.2%),with a.most a.l ra.io-opa.ue(98.3%).Urethra. ca.culi were frequently a.socia.ed with coexistent bla.der or upper urina.y tra.t ca.culi(16.8%)a.d underlying urethra. pa.hology(53.7%)including diverticulum(33.7%)or stricture(13.7%).Urethra. ca.culi were most commonly ma.a.ed with externa. urethrolithotomy(31.6%),retrogra.e ma.ipula.ion(22.1%),a.d endoscopic in situ lithotripsy(17.9%).Conclusion:This unique systema.ic review of urethra. ca.culi provided a.summa.y of clinica. fea.ures a.d trea.ment trends with a.suggested trea.ment *** in contempora.y urologica. pra.tice should be a.cording to ca.culus size,sha.e,a.a.omica. loca.ion,a.d presence of urethra. pa.hology.

关键词： Urina.y ca.culi Urethra Urethra. ca.culi Ma.a.ement a.gorithm

Ta.king a.ts:a.chitectura. Exhibition‘La.dsca.es in Motion’

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

城市漫步（GBa.） 2024年第1期 22-23页

作者： rachel Wu 不详

Wha. sort of questions would a. a.chitect a.dress when it comes to urba. public a.d community a.chitectura. design?Wha. is the rela.ionship between a.chitecture a.d na.ure?

关键词： a.chitectura. Exhibition a.chitect

Ya.qing Longqingxia.Gorge The"Little Guilin"of Beijing

维普期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

城市漫步（GBa.） 2024年第8期 6-9页

作者： rachel Weiss 不详

Hiking,boa.ing,bungeejumping-does tha. sound like your kind of fun?If so,Longqingxia.Gorge is the perfect da. trip from *** 85 kilometers northwest of the city,this stunning destina.ion boa.ts crysta.-clea.wa.ers,lush... 详细信息

关键词： northwest perfect destina.ion

Nina.66 Beiluogu Xia.g,Dongcheng district,Beijing

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

城市漫步（GBa.） 2024年第6期 12-13页

作者： rachel Weiss 不详

Nestled a.idst the la.yrinthine a.leys of Beijing's historic Beiluoguxia.g hutong lies Nina.a.gem of a.ba. exuding a.unique cha.m tha. dra.s in loca.s a.d wa.derers *** its hea.t is Ita.ia. na.ive Umberto,a.ba.tender ... 详细信息

关键词： district Ita.ia. interview

The Ultima.e Beijing Da.-to-Night Da.e Guide 2

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

城市漫步（GBa.） 2024年第2期 18-21页

作者： rachel Weiss 不详

Gra. your pa.tner-in-crime a.d get set for our second edition of the Ultima.e Beijing Da.-to-Night Da.e *** round ta.es you on a. a.venture through the hutong a.ea.southea.t of Qia.men *** quirky boutiques to cozy ca.es,DIY perfume stores to innova.ive ea.eries,this a.ea.is flld with a.delightful combina.ion of tra.ition a.d modernity tha. will ignite your curiosity a.d tickle your ta.te buds.

关键词： DIY Gra. stores

Ma.hine lea.ning a.proa.h to a.sess the a.socia.ion between a.thropometric,meta.olic,a.d nutritiona. sta.us a.d semen pa.a.eters

维普期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

a.ia. Journa. of a.drology 2024年第4期26卷 349-355页

作者： Guilla.me Ba.helot a.tonin La.a.iere Seba.tien Czernichow Celine Fa.re Chrystelle Ra.ine rachel Levy Cha.lotte Dupont Nutrition a.d Fertility(a.IFERT)Group a.thor Informa.ion Sorbonne University School of Medicine Saint-Antoine Research CenterINSERM UMR 93827 rue ChalignyParis 75012France Reproductive Biology Depa.tment-CECOS Tenon HospitalAP-HP.Sorbonne UniversityParis 75020France Clinica. Meta.olomics Depa.tment Saint-Antoine HospitalAP-HP27 rue ChalignyParis 75012France Nutrition Depa.tment Obesity Specialist CentreGeorges Pompidou European HospitalAP-HPParis 75015France 不详

Ma.y lifestyle fa.tors,such a. nutritiona. imba.a.ce lea.ing to obesity,meta.olic disorders,a.d nutritiona. deficiency,ha.e been identified a. potentia. risk fa.tors for ma.e *** a.m of this study wa. to eva.ua.e the rela.ionship between semen pa.a.eters a.d a.thropometric,meta.olic a.d nutritiona. *** wa. first a.sessed individua.ly,then a.ter the a.plica.ion of a.previously constructed a.d va.ida.ed ma.hine lea.ning score tha. a.lows their ***,meta.olic,a.tioxida.t,micronutrient,a.d sperm pa.a.eters from 75 men suffering from idiopa.hic infertility from four infertility centers in Fra.ce(Jea.-Verdier a.T Center Hospita.,Bondy;North Hospita. a.T Center,Sa.nt-Étienne;Na.a.re Polyclinic a.T Center,Pa.;a.d Cochin Hospita. a.T Center,Pa.is)between September 2009 a.d December 2013 were *** a.sessing sta.da.d correla.ion a.a.ysis,a.previously built ma.hine lea.ning model,providing a.score ra.ging from 0(the poorest)to 1(the most fa.ora.le),wa. ca.cula.ed for ea.h ma. in the study *** ma.hine lea.ning model,which sepa.a.es infertile/fertile men with unexpla.ned infertility on the ba.is of their bioclinica. signa.ure,provides a.more holistic eva.ua.ion of the influence of the considered ma.kers(a.thropometric,meta.olic,a.d oxida.ive sta.us).We observed a.significa.t correla.ion of some a.thropometric,meta.olic,a.d nutritiona. disorders with some sperm ***,a. unfa.ora.le ma.hine lea.ning score wa. a.socia.ed with a.high level of sperm DNa.*** a.thropometric,meta.olic,a.d oxida.ive pa.terns,which ma. reflect a. a.propria.e lifestyle,a.pea. to positively impa.t overa.l hea.th,in pa.ticula. reproductive *** study,consistent with previous publica.ions,suggests tha. beyond semen qua.ity pa.a.eters,in a. essentia. a.sessment of ma.e fertility,other key fa.tors should be ta.en into *** this rega.d,the a.plica.ion of emerging a.tificia. intelligence t

关键词： lifestyle ma.hine lea.ning meta.olism nutrition sperm DNa.fra.menta.ion