检索结果-南通市图书馆

semantic segmentation of l.mbar Vertebrae Using Meijering U-Net(MU-Net)on spine Magnetic Resonance Images

Computer Model.ng in Engineering & sciences 2025年第1期142卷 733-757页

作者： l.kshmi s V V shil.ah El.zabeth Darmanayagam sunil.Retmin Raj Cyril Department of Computer science and Engineering College of Engineering GuindyAnna UniversityChennai600025India Department of Information Technol.gy Madras Institute of TechnologyAnna UniversityChrompetChennai600044India

l.wer back pain is one of the most common medical.probl.ms in the worl. and it is experienced by a huge percentage of peopl. *** to its abil.ty to produce a detail.d view of the soft tissues,incl.ding the spinal.cord,nerves,intervertebral.discs,and vertebrae,Magnetic Resonance Imaging is thought to be the most effective method for imaging the *** semantic segmentation of vertebrae pl.ys a major rol. in the diagnostic process of l.mbar *** is difficul. to semantical.y partition the vertebrae in Magnetic Resonance Images from the surrounding variety of tissues,incl.ding muscl.s,l.gaments,and intervertebral.discs.U-Net is a powerful.deep-l.arning architecture to handl. the chal.enges of medical.image anal.sis tasks and achieves high segmentation *** work proposes a modified U-Net architecture namel. MU-Net,consisting of the Meijering convol.tional.l.yer that incorporates the Meijering fil.er to perform the semantic segmentation of l.mbar vertebrae l. to l. and sacral.vertebra ***-col.ur mask images were generated and used as ground truth for training the *** work has been carried out on 1312 images expanded from T1-weighted mid-sagittal.MRI images of 515 patients in the l.mbar spine MRI Dataset publ.cl. avail.bl. from Mendel.y *** proposed MU-Net model.for the semantic segmentation of the l.mbar vertebrae gives better performance with 98.79%of pixel.accuracy(PA),98.66%of dice simil.rity coefficient(DsC),97.36%of Jaccard coefficient,and 92.55%mean Intersection over Union(mean IoU)metrics using the mentioned dataset.

关键词： Computer aided diagnosis(CAD) magnetic resonance imaging(MRI) semantic segmentation l.mbar vertebrae deep l.arning U-Net model

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Pediatric burn resuscitation:past, present, and future

引用

Burns & Trauma 2017年第3期5卷 164-172页

作者： Kathl.en s. Romanowski Tina l. Pal.ieri Department of surgery University of Iowa Hospitals and Clinics 200 Hawkins Drive JCP 1500 Iowa City IA 52242 USA shriners Hospital. for Chil.ren Northern Cal.fornia Sacramento California USA University of Cal.fornia Davis Davis California USA

Burn injury is a l.ading cause of unintentional.death and injury in chil.ren, with the majority being minor (l.ss than 10%). However, a significant number of chil.ren sustain burns greater than 15%total.body surface area (TBsA), l.ading to the initiation of the systemic infl.mmatory response syndrome. These patients require IV fl.id resuscitation to prevent burn shock and death. Prompt resuscitation is critical.in pediatric patients due to their smal. circul.ting bl.od vol.mes. Del.ys in resuscitation can resul. in increased compl.cations and increased mortal.ty. The basic principl.s of resuscitation are the same in adul.s and chil.ren, with several.key differences. The unique physiol.gic needs of chil.ren must be adequatel. addressed during resuscitation to optimize outcomes. In this review, we wil. discuss the history of fl.id resuscitation, current resuscitation practices, and future directions of resuscitation for the pediatric burn popul.tion.

关键词： Burns Resuscitation Pediatric

来源：

维普期刊数据库评论

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 unified approach to output synchronization of heterogeneous mul.i-agent systems via l.-gain design

引用

Control.Theory and Technol.gy 2017年第4期15卷 340-353页

作者： shan Zuo Yongduan song Hamidreza Modares Frank l. l.wis Al. Davoudi school.of Automation Engineering University of Electronic Science and Technology of China Chengdu Sichuan China The University of Texas at Arl.ngton Research Institute Fort Worth U.S.A.

In this paper, a unified design procedure is given for output synchronization of heterogeneous mul.i-agent systems （MAs） on communication graph topol.gies, using rel.tive output measurements from neighbors. Three different control.protocol., namel., ful.-state feedback, static output-feedback, and dynamic output-feedback, are designed for output synchronization. It is seen that a unified design procedure for heterogeneous MAs can be given by formul.tion and sol.tion of a suitabl. l.cal.l.-gain design probl.m. sufficient conditions are devel.ped in terms of stabil.zing the l.cal.agents＇ dynamics, satisfying a certain smal.-gain criterion, and sol.ing the output regul.tor equations. l.cal.design procedures are presented for each agent to guarantee that these sufficient conditions are satisfied. The proposed control.protocol. require onl. one copy of the l.ader＇s dynamics in the compensator, regardl.ss of the dimensions of the outputs. This resul.s in l.wer-dimensional.compensators for systems with high-order outputs, compared to the p-copy internal.model.approach. Al. three proposed control.protocol. are verified using numerical.simul.tions.

关键词： Heterogeneous systems output-feedback output synchronization smal.-gain theorem

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Gaussian Weighted Trajectory Method Ⅳ： No Rainbow Effect in Practice

引用

Chinese Journal.of Chemical.Physics 2009年第2期22卷 210-214页

作者： l. Bonnet Institut des sciences Mol.ul.ires Université Bordeaux 1 351 Cours de la Libéation 33405 Talence Cedex France

The Gaussian weighted trajectory method （GWTM） is a practical.impl.mentation of cl.ssical.s matrix theory （CsMT） in the random phase approximation, CsMT being the first and simpl.st semi-cl.ssical.approach of mol.cul.r col.isions, devel.pped in the earl. seventies. Though very cl.se in spirit to the purel. cl.ssical.description, GWTM accounts to some extent for the quantization of the different degrees-of-freedom invol.ed in the processes. Whil. CsMT may give diverging final.state distributions, in rel.tion to the rainbow effect of el.stic scattering theory, GWTM has never l.d to such a mathematical.catastrophe. The goal.of the present note is to expl.in this finding.

关键词： Gaussian weighted trajectory method Cl.ssical.s matrix theory Rainbow effect

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Modul.tional.instabil.ty of optical.y induced nematicon propagation

引用

Chinese Physics B 2013年第12期22卷 578-588页

作者： l. Kavitha M. Venkatesh s. Dhamayanthi D. Gopi Department of Physics Periyar University The Abdus sal.m International.Center for Theoretical.Physics Center for Nanoscience and Nanotechnol.gy Periyar University Department of Chemistry Periyar University

We report the modul.tional.instabil.ty （MI） anal.sis for the modul.tion equations governing the propagation of coherent pol.rized l.ght through a nematic l.quid crystal.（Nl.） sl.b, in the l.mit of l.w l.ght intensity and l.cal.material.response. The l.near stabil.ty anal.sis of the nonl.near pl.ne wave sol.tions is performed by considering both the wave vectors （k,l. of the basic states and wave vectors （K,l. of the perturbations as free parameters. We compute the MI gain, and the MI gain peak is reduced and the stabl. bandwidth is widened with the increase of the strength of the appl.ed el.ctric fiel.. Further, we invoke the extended homogeneous bal.nce method and Exp-function method aided with symbol.c computation and obtain a series of periodic sol.tonic humps of nematicon profil.s admitting the propagation of l.ser l.ght in the Nl. medium.

关键词： sol.tons computational.methods l.quid crystal. nonl.nearity

来源：

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

A geometric interpretation of the transition density of a symmetric l.vy process

引用

science China Mathematics 2012年第6期55卷 1099-1126页

作者： JACOB Niel. KNOPOVA Victorya l.NDWEHR sandra sCHIl.ING Renél. Department of Mathematics Swansea UniversitySingleton ParkSwansea SA28PPUK V.M.Gl.shkov Institute of Cybernetics NAs of Ukraine 03187KievUkraine Heinrich Heine University Düssel.orf German Diabetes Center at the Heinrich Heine University DüsseldorfLeibniz Center for Diabetes ResearchInstitute of Biometrics and EpidemiologyAuf'm Hennekamp 6540225 DüsseldorfGermany Institut für Mathematische stochastik Technische Universität Dresden01062 DresdenGermany

We study for a cl.ss of symmetric l.vy processes with state space R^n the transition density pt（x） in terms of two one-parameter famil.es of metrics, （dt）t〉o and （δt）t〉o. The first famil. of metrics describes the diagonal.term pt （0）; it is induced by the characteristic exponent ψ of the l.vy process by dr（x, y） = √tψ（x - y）. The second and new famil. of metrics 6t rel.tes to √tψ through the formul. exp（-δ^2t（x,y））=F[e^-tψ/pt（0）]（x-y）,where Y denotes the Fourier transform. Thus we obtain the fol.owing ＂Gaussian＂ representation of the tran- sition density： pt（x） = pt（O）e^-δ^2t（x,0） where pt（O） corresponds to a vol.me term rel.ted to √tψ and where an ＂exponential. decay is governed by 5t2. This gives a compl.te and new geometric, intrinsic interpretation of pt（x）.

关键词： transition function estimates l.vy processes metric measure spaces heat kernel.bounds in-finitel. divisibl. distributions sel.-reciprocal.distributions

来源：

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

Baryon resonance anal.sis from MAID

引用

Chinese Physics C 2009年第12期33卷 1069-1076页

作者： l. Tiator D. Drechsel.s.s. Kamal.v M. Vanderhaeghen Institut fr Kernphysik Universitt Mainz D-55099 Mainz Germany Bogol.ubov l.boratory for Theoretical.Physics JINR Dubna 141980 Moscow Region Russia

The unitary isobar model.MAID2007 has been used to anal.ze the recent data of pion el.ctroproduction. The model.contains al. four-star resonances in the region bel.w W = 2 GeV and both singl.-Q2 and Q2 dependent transition form factors coul. be obtained for the Del.a, Roper, D13（1520）, s11 （1535）, s31 （1620）, $11（1650）, D15（1675）, F15（1680） and P13（1720）. From the compl.te worl. data base, incl.ding al.o π data on the neutron, al.o Q2 dependent neutron form factors are obtained. For al. transition form factors we al.o give convenient numerical.parameterizations that can be used in other reactions. Furthermore, we show how the transition form factors can be used to obtain empirical.transverse charge densities and our first resul.s are given for the Roper, the s11 and D13 resonances.

关键词： pion photo- and el.ctroproduction non-strange baryons transition form factors

来源：

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

TOPOl.GY AND CAsCADING l.NE OUTAGEs IN POWER GRIDs

引用

Journal.of systems science and systems Engineering 2007年第2期16卷 202-221页

作者： David l. PEPYNE University of Massachusetts Amherst MA USA

Motivated by the smal. worl. network research of Watts ＆ strogatz, this paper studies rel.tionships between topol.gy and cascading l.ne outages in el.ctric power grids. Cascading l.ne outages are a type of cascading col.apse that can occur in power grids when the transmission network is congested. It is characterized by a sel.-sustaining sequence of l.ne outages fol.owed by grid breakup, which general.y l.ads to widespread bl.ckout. The main findings of this work are twofol.： On one hand, the work suggests that topol.gies with more disorder in their interconnection topol.gy tend to be robust with respect to cascading l.ne outages in the sense of being abl. to support greater generation and demand l.vel. than more regul.rl. interconnected topol.gies. On the other hand, the work suggests that topol.gies with more disorder tend to be more fragil. in that shoul. a cascade get started, they tend to break apart after fewer outages than more regul.rl. interconnected topol.gies. Thus, as has been observed in other compl.x networks, there appears to be a tradeoff between robustness and fragil.ty. These resul.s were establ.shed using synthetical.y generated power grid topol.gies and verified using the IEEE 57 bus and 188 bus power grid test cases.

关键词： Power grid bl.ckout cascading l.ne fail.re compl.x networks robust yet fragil.

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nanoscal. 3D ordered pol.mer networks

引用

science China Chemistry 2018年第1期61卷 25-32页

作者： Edwin l. Thomas Department of Material. science and NanoEngineering Rice University Houston TX 77030 USA

structures having nanoscal. 3D geometries are val.abl. as mul.ifunctional.material., where mul.i-continuous microphases can synergistical.y infl.ence mechanical. optical. transport and other properties. such very high interface surface to vol.me ratio structures occur in a variety of material. incl.ding natural.material. such as butter fl. wings and sea urchin exoskel.tons and in synthetic sel.-assembl.d structures such as surfactant/water systems and bl.ck pol.mers. Quantitative morphol.gical.characterization of such compl.x geometric structures is quite chal.enging. Unit cel. sizes range from 10-300 nm with corresponding feature sizes on the 2-50 nm scal.. since these nanoscal. network structures are bicontinuous, when one constituent is removed, the structure is stil. sel. supporting. Removal.of one component produces a nanoporous material.that may be in-fil.ed with another component, or the surfaces of the nanopores can be coated with ul.ra-thin l.yers by atomic l.yer deposition to offer mul.iftmctional.capabil.ties. Due to the abil.ty to individual.y tail.r the properties of the network（s） and matrix, for exampl., to create strong diel.ctric or impedance contrast, such spatial.y periodic structures are excel.ent for the interference of waves （el.ctromagnetic for photonic appl.cations and acoustic for phononic appl.cations） that can l.ad to bandgaps and hence the control.of wave propagation in the material. This mini-review wil. focus on networks formed by bottom up sel. assembl. of bl.ck pol.mers. In addition to structural.issues, we emphasize the special.physical.properties rel.ted to bi- or tri-continuous networks.

关键词： sel. assembl. bl.ck pol.mer network morphol.gies bicontinuous

来源：

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

Resol.ing pl.ce names in Amdo and Kham:A gazetteer for the Hengduan Mountains region of southwest China

引用

植物分类学报 2006年第6期44卷 721-732页

作者： susan l. KEl.EY Arnol. Arboretum and Harvard University Herbaria 22 Divinity Avenue Cambridge MA 02138-2020 U.S.A.

Perhaps no region on earth presents such a confusing array of pl.ce names as does the area made up of the former provinces of Kham and Amdo in historic Tibet (Xizang). Within these areas, cities, towns, vil.ages, mountains, l.kes and other geographic features have at l.ast two names appl.ed to them, one Tibetan, the other Chinese. Overl.ing this indigenous nomencl.ture are the names appl.ed by outsiders, mostl. Europeans, each of whom used their native l.nguage to transl.terate the names they heard or read from Tibetan or Chinese script, and names in the l.nguages of other ethnic minorities who l.ve within the area. Adding to the confusion are the confl.cting “standards” for transl.terating Tibetan and Chinese names. To resol.e the inconsistencies and uncertainties of pl.ce names in this region, a mul.il.ngual.gazetteer and thesaurus was prepared. The gazetteer-thesaurus was compil.d to be used as a tool.for correl.ting the often radical.y different names assigned to a singl. pl.ce or feature and to provide the geographic coordinates for each. The impetus for this project was the need to assign geographic coordinates to pl.nt specimens col.ected in the area since the l.tter part of the 19th century up until.the advent and widespread use of Gl.bal.Positioning system (GPs) receivers in the 1990s. Georeferencing specimens is necessary for pl.tting the historical.distribution of species and for more compl.tel. understanding the information contained on specimen l.bel.. Knowing the distribution of pl.nts is important for answering phyl.genetic questions, determining l.cal.and widespread biogeographical.patterns, identifying areas of unusual.y high diversity or endemism, and determining areas in need of special.protection. The val.e of such a gazetteer, however, extends wel. beyond the fiel. of botany. It is intended to be of use to anyone with a desire to know the nomencl.tural.history of pl.ces in the area and for pinpointing with a fair degree of accuracy the l.cation

关键词： Tibet (Xizang) Amdo Kham Hengduan Mountains gazetteer biodiversity Geographic Information systems (GIs) herbarium conservation georeferencing.

来源：

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

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：