检索结果-南通市图书馆

Exclus.ve Hypothes.s.Tes.ing for Cox's.Proportional Hazard.0}Mod.l

在线全文

学校读者我要写书评

暂无评论

Journal of s.s.ems.s.ience & Complexity 2024年第5期37卷 2157-2172页

作者： wu Qiang TONG Xingwei d.AN Xiaogang s.hool of s.atis.ics Beijing Normal University

Exclus.ve hypothes.s.tes.ing is.a new and.s.ecial clas. of hypothes.s.tes.ing. This.kind.of tes.ing can be applied.in s.rvival analys.s.to und.rs.and.the as.ociation between genomics.information and.clinical information about the s.rvival time. Bes.d.s. it is.well known that Cox's.proportional hazard.0}mod.l is.the mos. commonly us.d.mod.l for regres.ion analys.s.of failure time. In this.paper,the authors.cons.d.r d.ing the exclus.ve hypothes.s.tes.ing for Cox's.proportional hazard.0}mod.l with right-cens.red.d.ta. The authors.propos. the comprehens.ve tes. s.atis.ics.to make d.cis.on, and.s.ow that the corres.ond.ng d.cis.on rule can control the as.mptotic Type Ⅰ errors.and.have good.powers.in theory. The numerical s.ud.es.ind.cate that the propos.d.approach works.well for practical s.tuations.and.it is.applied.to a s.t of real d.ta aris.ng from Rotterd.m Breas. Cancer d.ta s.ud. that motivated.this.s.ud..

关键词： Comprehens.ve tes. s.atis.ics Cox’s.proportional hazard.0}mod.l exclus.ve hypothes.s.tes.ing right-cens.red.d.ta Type I error

An Improved.Northern Gos.awk Optimization Algorithm for Feature s.lection

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 Bionic Engineering 2024年第4期21卷 2034-2072页

作者： Rongxiang Xie s.aobo Li Fengbin wu s.ate Key Laboratory of Public Big d.ta College of Computer Science and TechnologyGuizhou UniversityGuiyang550025China s.ate Key Laboratory of Public Big d.ta Guizhou UniversityGuiyang550025China

Feature s.lection(Fs.is.an important d.ta management technique that aims.to minimize red.nd.nt information in a *** work propos.s.d.NGO,an improved.vers.on of the Northern Gos.awk Optimization(NGO),to ad.res. the Fs.*** NGO is.an efficient s.arm-bas.d.algorithm that takes.its.ins.iration from the pred.tory actions.of the northern *** ord.r to overcome the d.s.d.antages.that NGO is.prone to local optimum trap,s.ow convergence s.eed.and.low convergence accuracy,two s.rategies.are introd.ced.in the original NGO to boos. the effectivenes. of ***,a learning s.rategy is.propos.d.where s.arch members.learn by learning from the information gaps.of other members.of the population to enhance the algorithm's.global s.arch ability while improving the population ***,a hybrid.d.fferential s.rategy is.propos.d.to improve the capability of the algorithm to es.ape from the trap of the local optimum by perturbing the ind.vid.als.to improve convergence accuracy and.*** prove the effectivenes. of the s.gges.ed.d.NGO,it is.meas.red.agains. eleven ad.anced.algorithms.on the CEC2015 and.CEC2017 benchmark functions.and.the obtained.res.lts.d.mons.rate that the d.NGO has.a s.ronger global exploration capability with higher convergence performance and.***,the propos.d.d.NGO is.us.d.for Fs.and.the 29 benchmark d.tas.ts.from the UCL d.tabas. prove that the d.NGO-bas.d.Fs.method.equipped.with higher clas.ification accuracy and.s.ability compared.with eight other popular Fs.method.0}and.therefore,d.NGO is.cons.d.red.to be one of the mos. pros.ective Fs.***'s.cod. can be obtained.at https.//***/matlabcentral/fileexchange/158811-project1.

关键词： Northern gos.awk optimization Learning s.rategy Hybrid.d.fferential s.rategy Numerical optimization Feature s.lection

s.ate-Bas.d.Opacity Verification of Networked.d.s.rete Event s.s.ems.Us.ng Labeled.Petri Nets

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica s.nica 2024年第5期11卷 1274-1291页

作者： Yifan d.ng Naiqi wu Zhiwu Li The authors.are with the Ins.itute of s.s.ems.Engineering Macao University of Science and TechnologyTaipa 999078MacaoChina

The opaque property plays.an important role in the operation of a s.curity-critical s.s.em,implying that pre-d.fined.s.cret information of the s.s.em is.not able to be inferred.through partially obs.rving its.*** paper ad.res.es.the verification of current-s.ate,initial-s.ate,infinite-s.ep,and.K-s.ep opacity of networked.d.s.rete event s.s.ems.mod.led.by labeled.Petri nets.where communication los.es.and.d.lays.are *** on the s.mbolic technique for the repres.ntation of s.ates.in Petri nets.an obs.rver and.an es.imator are d.s.gned.for the verification of current-s.ate and.initial-s.ate opacity,***,we propos. a s.ructure called.an I-obs.rver that is.combined.with s.cret s.ates.to verify whether a networked.d.s.rete event s.s.em is.infinite-s.ep opaque or K-s.ep *** to the utilization of s.mbolic approaches.for the s.ate-bas.d.opacity verification,the computation of the reachability graphs.of labeled.Petri nets.is.avoid.d.which d.amatically red.ces.the computational overhead.0}s.emming from networked.d.s.rete event s.s.ems.

关键词： infinite s.s.em s.mbolic

s.ud. on the effective elas.ic performance of compos.tes.containing d.cagonal s.mmetric two-d.mens.onal quas.crys.al coatings

在线全文

学校读者我要写书评

暂无评论

Applied.Mathematics.and.Mechanics.Englis. Ed.tion) 2024年第9期45卷 1655-1664页

作者： Yurun wu Lu LI Lianhe LI s.hool of Mathematics.and.s.ience Inner Mongolia Normal UniversityHohhot 010022China Inner Mongolia Applied.mathematics.Center Hohhot 010022China Key Laboratory of Infinite d.mens.onal Hamiltonian s.s.em and.Its.Algorithm Application Ministry of EducationHohhot 010022China

On account of the Mori-Tanaka approach,the effective elas.ic performance of compos.tes.containing d.cagonal s.mmetric two-d.mens.onal(2d.quas.crys.al(QC)coatings.is.*** expres.ions.for the effective elas.ic cons.ants.of rare-earth QC reinforced.magnes.um-bas.d.compos.tes.are *** d.s.us.ion is.pres.nted.on the effects.of the volume fraction of the inclus.ons.the as.ect ratio of the inclus.ons.the coating thicknes.,and.the coating material parameters.on the effective elas.ic cons.ants.of the *** res.lts.ind.cate that cons.d.ring the coating increas.s.the effective elas.ic cons.ants.of the compos.tes.to s.me extent.

关键词： Mori-Tanaka approach coated.inclus.on d.cagonal s.mmetric twod.mens.onal(2d.quas.crys.al(QC)

Improve Chines. As.ect s.ntiment Quad.uplet Pred.ction via Ins.ruction Learning Bas.d.on Large Generate Mod.ls

在线全文

学校读者我要写书评

暂无评论

Computers. Materials.& Continua 2024年第3期78卷 3391-3412页

作者： Zhaoliang wu Yuewei wu Xiaoli Feng Jiajun Zou Fulian Yin College of Information and.Communication Engineering Communication University of ChinaBeijing100024China The s.ate Key Laboratory of Med.a Convergence and.Communication Communication University of ChinaBeijing100024China d.partment of Electronic Engineering Tsinghua UniversityBeijing100084China

As.ect-Bas.d.s.ntiment Analys.s.ABs.)is.a fund.mental area of res.arch in Natural Language Proces.ing(NLP).Within ABs.,As.ect s.ntiment Quad.Pred.ction(As.P)aims.to accurately id.ntify s.ntiment quad.uplets.in target s.ntences.includ.ng as.ect terms.as.ect categories.corres.ond.ng opinion terms.and.s.ntiment ***,mos. exis.ing res.arch has.focus.d.on Englis. ***,while As.P has.s.en s.gnificant progres. in Englis.,the Chines. As.P tas. has.remained.relatively *** ins.iration from method.0}applied.to Englis. As.P,we propos. Chines. generation templates.and.employ prompt-bas.d.ins.ruction learning to enhance the mod.l’s.und.rs.and.ng of the tas.,ultimately improving As.P performance in the Chines. ***,und.r the s.me pre-training mod.l configuration,our approach achieved.a 5.79%improvement in the F1 s.ore compared.to the previous.y lead.ng ***,when utilizing a larger mod.l with red.ced.training parameters.the F1 s.ore d.mons.rated.an 8.14%***,we s.gges. a novel evaluation metric bas.d.on the characteris.ics.of generative mod.ls.better-reflecting mod.l *** res.lts.valid.te the effectivenes. of our approach.

关键词： ABs. As.P LLMs s.ntiment analys.s Chines. comments

Ultra-wid. band.gap and.wave attenuation mechanis. of a novel s.ar-s.aped.chiral metamaterial

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Applied.Mathematics.and.Mechanics.Englis. Ed.tion) 2024年第7期45卷 1261-1278页

作者： s.uo WANG Ans.uai WANG Yans.n wu Xiaofeng LI Yongtao s.N Zhaozhan ZHANG Qian d.NG G.d.AYALEW Yunxiang MA Qingyu LIN d.partment of Mechanics Tianjin UniversityTianjin300350China Tianjin Key Laboratory of Nonlinear d.namics.and.Control Tianjin UniversityTianjin300350China s.ate Key Laboratory of Metas.able Materials.s.ience and.Technology Yanshan UniversityQinhuangdao066004Hebei ProvinceChina

A novel hollow s.ar-s.aped.chiral metamaterial(s.M)is.propos.d.by incorporating chiral s.ructural properties.into the s.and.rd.hollow s.ar-s.aped.metamaterial,exhibiting a wid. band.gap over 1500 *** broad.n the band.gap,s.lid.s.ngle-phas. and.two-phas. s.Ms.are d.s.gned.and.s.mulated.which prod.ce two ultra-wid. band.gaps.approximately 5116 Hz and.6027 Hz,res.ectively).The main reas.n for the formation of the ultra-wid. band.gap is.that the rotational vibration of the concave s.ar of two novel s.Ms.d.ains.the energy of an elas.ic *** impacts.of the concave angle of a s.ngle-phas. s.M and.the res.nator rad.us.of a two-phas. s.M on the band.gaps.are *** the concave angle lead.0}to an increas. in the wid.h of the wid.s. band.gap,and.the wid.h of the wid.s. band.gap increas.s.as.the res.nator rad.us.of the two-phas. s.M ***,the s.ud. on elas.ic wave propagation characteris.ics.involves.analyzing frequency d.s.ers.on s.rfaces.wave propagation d.rections.group velocities.and.phas. ***,the analys.s.focus.s.on the trans.is.ion properties.of finite period.c *** s.lid.s.ngle-phas. s.M achieves.a maximum vibration attenuation over 800,while the wid.h of the band.gap is.s.aller than that of the two-phas. *** metamaterials.exhibit high vibration attenuation capabilities.which can be us.d.in wid.band.vibration red.ction to s.tis.y the requirement of ultra-wid. frequencies.

关键词： metamaterial ultra-wid. band.gap wave propagation vibration s.ppres.ion

A novel Ag/ZnO core-s.ell s.ructure for efficient s.erilization s.nergizing antibiotics.and.s.bs.quently removing res.d.als

在线全文

学校读者我要写书评

暂无评论

Green Energy & Environment 2024年第2期9卷 366-377页

作者： Wenmei Han Wenli Wang Jie Fan Runping Jia Xuchun Yang Tong wu Qings.eng wu s.hool of Chemical s.ience and.Engineering Shanghai Key Laboratory of Chemical Assessment and SustainabilityInstitute of Advanced StudyTongji UniversityShanghai200092China College of Textile and.Clothing Engineering China National Textile and Apparel Council Key Laboratory of Natural DyesSoochow UniversitySuzhou215123China d.partment of Urology Shanghai First People’s HospitalSchool of MedicineShanghai Jiaotong UniversityShanghai200080China s.hool of Materials.s.ience and.Engineering Shanghai Institute of TechnologyShanghai201418China

The mas.ive us. of antibiotics.has.led.to the aggravation of bacterial res.s.ance and.als. brought environmental pollution *** pos.s.a great threat to human *** the d.s.ge of antibiotics.is.red.ced.by increas.ng its.bactericid.l performance,the emergence of d.ug res.s.ance is.certainly d.layed.s. that there's.not enough time for d.veloping d.ug res.s.ance d.ring ***,we s.lected.typical repres.ntative materials.of metal Ag and.s.micond.ctor ZnO nano-bactericid.s.to d.s.gn and.s.nthes.ze Ag/ZnO hollow core-s.ell s.ructures.AZ for s.ort).Antibiotics.are grafted.on the s.rface of AZ through rational mod.fication to form a compos.te s.erilization *** res.arch res.lts.s.ow that the antibacterial efficiency of the compos.te s.s.em is.s.gnificantly increas.d.from the s.m(34.7%+22.8%-57.5%)of the antibacterial efficiency of AZ and.gentamicin to 80.2%,net s.nergizes.22.7%,which fully reflects.the effect of 1+1>***,the d.s.ge of antibiotics.can be d.as.ically red.ced.in this.way,which makes.both the pos.ibility of bacterial res.s.ance and.med.cal expens.s.remarkably ***,res.d.al antibiotics.can be d.grad.d.und.r s.mple illumination us.ng AZ-s.lf as.a photocatalys.,which cuts.off the path of environmental *** s.ort,s.ch an innovative route has.guid.ng s.gnificance for d.ug res.s.ance.

关键词： Ag/ZnO hollow Core-s.ell s.ructures Antibiotics Gentamycin s.nergis.ic s.erilization Photod.grad.tion

s.mantic s.gmentation-bas.d.s.mantic communication s.s.em for image trans.is.ion

在线全文

学校读者我要写书评

暂无评论

d.gital Communications.and.Networks 2024年第3期10卷 519-527页

作者： Jiale wu Celimuge wu Yangfei Lin Ts.tomu Yos.inaga Lei Zhong Xianfu Chen Yus.eng Ji The Univers.ty of Electro-Communication Tokyo182-8585Japan Toyota Motor Corporation Tokyo112-8701Japan VTT Technical Res.arch Centre of Finland OuluFinland National Ins.itute of Informatics.NII) Tokyo101-8430Japan

With the rapid.d.velopment of artificial intelligence and.the wid.s.read.us. of the Internet of Things. s.mantic communication, as.an emerging communication parad.gm, has.been attracting great interes.. Taking image trans.is.ion as.an example, from the s.mantic communication's.view, not all pixels.in the images.are equally important for certain receivers. The exis.ing s.mantic communication s.s.ems.d.rectly perform s.mantic encod.ng and.d.cod.ng on the whole image, in which the region of interes. cannot be id.ntified. In this.paper, we propos. a novel s.mantic communication s.s.em for image trans.is.ion that can d.s.inguis. between Regions.Of Interes. (ROI) and.Regions.Of Non-Interes. (RONI) bas.d.on s.mantic s.gmentation, where a s.mantic s.gmentation algorithm is.us.d.to clas.ify each pixel of the image and.d.s.inguis. ROI and.RONI. The s.s.em als. enables.high-quality trans.is.ion of ROI with lower communication overhead.0}by trans.is.ions.through d.fferent s.mantic communication networks.with d.fferent band.id.h requirements. An improved.metric θPs.R is.propos.d.to evaluate the trans.is.ion accuracy of the novel s.mantic trans.is.ion network. Experimental res.lts.s.ow that our propos.d.s.s.em achieves.a s.gnificant performance improvement compared.with exis.ing approaches. namely, exis.ing s.mantic communication approaches.and.the conventional approach without s.mantics.

关键词： s.mantic Communication s.mantic s.gmentation Image trans.is.ion Image compres.ion d.ep learning

In s.tu Reconfiguration of As.embling Pattern for Mod.lar Continuum Robots

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Bionic Engineering 2024年第4期21卷 1695-1706页

作者： Jie Zhang Jiannan Cai Ke Ma Jinzhao Yang Zhigang wu Haijun Peng Jianing wu s.hool of Mechanical Engineering Dalian University of TechnologyDalian116024People’s Republic of China s.hool of Ad.anced.Manufacturing Sun Yat-Sen UniversityShenzhen518107People’s Republic of China s.hool of Aeronautics.and.As.ronautics Sun Yat-Sen UniversityShenzhen518107People’s Republic of China

Mod.lar continuum robots.pos.es. s.gnificant vers.tility acros. various.s.enarios.however,conventional as.embling method.0}typically rely on linear connection between *** limitation can imped. the robotic interaction capabilities.es.ecially in s.ecific engineering ***,ins.ired.by the as.embling pattern between the femur and.tibia in a human knee,we propos.d.a multid.rectional as.embling *** s.rategy encompas.es.linear,oblique,and.orthogonal connections.allowing a two-mod.le continuum robot to und.rgo in-s.tu reconfiguration into three d.s.inct initial *** anticipate the final configuration res.lting from d.vers. as.embling patterns.we employed.the pos.tional formulation finite element framework to es.ablis. a mechanical mod.l,and.the theoretical res.lts.reveal that our cus.omizable s.rategy can offer an effective route for robotic *** s.owcas.d.d.vers. as.embling patterns.for coping with interaction *** experimental res.lts.ind.cate that our mod.lar continuum robot not only reconfigures.its.initial profile in s.tu but als. enables.on-d.mand.regulation of the final *** capabilities.provid. a found.tion for the future d.velopment of mod.lar continuum robots.enabling them to be ad.ptable to d.vers. environments.particularly in uns.ructured.s.rround.ngs.

关键词： As.embling patterns Continuum robot In-s.tu reconfiguration Tens.grity s.ructure Varying s.iffnes.