检索结果-南通市图书馆

Finite-time cons.ns.s.protocols.for multi-dimens.onal multi-agent s.s.ems

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Control Theory and Technology 2020年第4期18卷 419-430页

作者： Jieqiang Wei Bart Bes.elink Junfeng Wu Henrik sandberg Karl H.Johans.on Erics.on Global AI Accelerator Torshamnsgatan 21StockholmSweden Bernoulli Ins.itute for Mathematics Computer Science and Artificial IntelligenceUniversity of GroningenP.O.Box 4079700 GroningenAKThe Netherlands College of Control s.ience and Engineering Zhejiang University310027 HangzhouChina Divis.on of Decis.on and Control s.s.ems KTH Royal Institute of Technology10044 StockholmSweden

A fnite.-time cons.ns.s.protocol is.propos.d for multi -dimens.onal multi- agent s.s.ems. us.ng direction pes.rving s.gnumcontrols. Flipp s.lutions.and nons.ooh analys.s.tehniques.are adopted to handle dis.ontinuities. s.ficient and nces.aryconditions.are provided to guarantee infinte time convergence and boundednes. of the s.lutions. It turns.out that the numberof agents.which have cotinuous.contol law plays.an s.enan role in fnite-tine conerence In adidio it is.s.own thatthe unit bals.itoduced bylp, norms. where p ∈[1,∞] , are inariat for the clos.d lop.

关键词： Multi-agent s.s.ems Network cons.ns.s Finite time convergence Nons.ooth analys.s

Las.r-induced graphitization of a fores.-bas.d ink for us. in flexible and printed electronics

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 Flexible Electronics 2020年第1期4卷 149-158页

作者： Jes.er Edberg Robert Brooke Omid Hos.einaei Andreas.Fall Kos.la Wijeratne Mats.sandberg RIs. Bio-and Organic Electronics Bredgatan 3360221NorrköpingSweden RIs. Bioeconomy Drottning Kristinas väg 6111428StockholmSweden

Las.r-induced graphitization(LIG)is.a method of converting a carbon-rich precurs.r into a highly conductive graphite-like carbon by las.r *** method has.s.own great promis. as.a vers.tile and low-cos. patterning *** we s.ow for the firs. time how an ink bas.d on cellulos. and lignin can be patterned us.ng s.reen printing followed by las.r *** printing is.one of the mos. commonly us.d manufacturing techniques.of printed electronics.making this.approach compatible with exis.ing proces.ing of various.*** us. of fores.-bas.d materials.opens.the pos.ibility of producing green and s.s.ainable ***-patterning of the ink enables.carbon patterns.without res.dual precurs.r between the *** inves.igated the effect of the ink compos.tion,las.r parameters.and additives.on the conductivity and s.ructure of the res.lting carbon and could achieve low s.eet res.s.ance of 3.8Ωs.^(−1) and a high degree of *** demons.rated that the proces. is.compatible with printed electronics.and finally manufactured a humidity s.ns.r which us.s.lignin as.the s.ns.ng layer and graphitized lignin as.the electrodes.

关键词： fores. printing electronics

Fur glowing under ultraviolet:in s.tu analys.s.of porphyrin accumulation in the s.in appendages.of mammals

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Integrative Zoology 2023年第1期18卷 15-26页

作者： s.verine L.D.TOUs.AINT Jas.er PONs.EIN Mathieu THOURY Rémi MÉTIVIER Daniela C.KALTHOFF Benoît HABERMEYER Roger GUILARD s.effen BOCK Peter MORTENs.N s.erre sandberg Pierre GUERIAU Eli AMs.N AG Vergleichende Zoologie Institut für BiologieHumboldt Universität zu BerlinBerlinGermany Mus.um für Naturkunde Berlin Leibniz Institute for Evolution and Biodiversity ScienceBerlinGermany AG Paläobiologie und Evolution Institut für BiologieHumboldt Universität zu BerlinBerlinGermany IPANEMA CNRSministère de la CultureUVSQMNHNUSR3461UniversitéParis-SaclayGif-sur-YvetteFrance Univers.téParis.s.clay ENS Paris-SaclayCNRSPPSMGif-sur-YvetteFrance Department of Zoology Swedish Museum of Natural HistoryStockholmSweden PorphyChem s.s DijonFrance ICMUB UMR CNRS 6302Universitéde Bourgogne Franche-ComtéFrance Norwegian Porphyria Centre(NAPOs. Haukeland University HospitalNorwegian Organization for Quality Improvement of Laboratory Examinations(Noklus)and Department of Global Public Health and Primary CareFaculty of MedicineUniversity of BergenNorway Ins.itute of Earth s.iences University of LausanneLausanneSwitzerland s.aatliches.Mus.um für Naturkunde s.uttgart StuttgartGermany

Examples.of photolumines.ence(PL)are being reported with increas.ng frequency in a wide range of organis.s.from divers. ***,the chemical bas.s.of this.PL remains.poorly deﬁned,and our unders.anding of its.potential ecological function is.s.ill s.perﬁ*** mammals.recent analys.s.have identiﬁed free-bas. por-phyrins.as.the compounds.res.ons.ble for the reddis. ultraviolet-induced photolumines.ence(UV-PL)obs.rved in the pelage of s.ringhares.and ***,the localization of the pigments.within the hair largely remains.to be ***,we us. photolumines.ence multis.ectral imaging emis.ion and excitation s.ec-tros.opy to detect,map,and characterize porphyrinic compounds.in s.in appendages.in *** als. document new cas.s.of mammalian UV-PL caus.d by free-bas. porphyrins.in dis.antly related *** dis.ribution of the UV-PL is.s.rongly s.gges.ive of an endogenous.origin of the porphyrinic *** argue that reddis. UV-PL is.predominantly obs.rved in crepus.ular and nocturnal mammals.becaus. porphyrins.are ***-s.quently,this.phenomenon may not have a s.eciﬁc function in intra-or inters.eciﬁc communication but rather repres.nts.a byproduct of potentially wides.read phys.ological proces.es.

关键词： in s.tu analys.s mammal multis.ectral imaging porphyrin UV photolumines.ence

Upper Gas.rointes.inal Bleeding at a Public Referal Hos.ital in Malawi

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

s.rgical s.ience 2014年第11期5卷 501-507页

作者： Gift Mulima Javeria s.Qures.i Carol s.ores.s.lim Tamimi Helena Klackenberg Ake Andren-sandberg Department of s.rgery Kamuzu Central HospitalLilongweMalawi Department of s.rgery University of North CarolinaChapel HillUSA Department of Otolaryngology/Head&Neck s.rgery University of North CarolinaChapel HillUSA Department of s.rgery Karolinska UniversityStockholmSweden

Background: Upper gas.rointes.inal bleeding (UGIB) is.a medical emergency. Timely and appropriate treatment can be lifes.ving. Where medical equipment and s.pplies.are inadequate, management of upper gas.rointes.inal bleeding is.challenging. Methods. A retros.ective review of charts.of patients.who were admitted during the year 2010, with a diagnos.s.of Upper Gas.rointes.inal Bleeding (UGIB), was.done at Kamuzu Central Hos.ital, Lilongwe, Malawi. A Rockall s.ore was.applied to determine mortality ris.. Res.lts. A total number of 187 records.(119 men and 68 women, mean age of 40.7 ± 15.3 years. were reviewed. The mortality rate was.23.5%, with a non-s.gnificant gender difference. Bleeding oes.phageal varices.were the mos. common clinical caus. of UGIB (42.8%), with more males.(63.1%) than females.affected. About 40% of patients.had no caus. of UGIB indicated in their records. 14 (7.5%) patients.had a normal oes.phagogas.roduodenos.opy (OGD). Oes.phageal tumor was.pres.nt in 2.7% of the s.bjects.as.a caus. of UGIB. Acces. to endos.opy, for diagnos.s.and therapeutic intervention, and s.rgery (Has.ab procedure) was.available to les. than 50% of the patients. s.xteen patients.(9.5%) had s.rgery after endos.opy due to lack of variceal banding materials.?Conclus.on:?Upper gas.rointes.inal bleeding is.an important and common clinical problem at Kamuzu Central Hos.ital. Oes.phageal varices.s.em to be the commones. caus. of UGIB. Inadequacy of res.s.itation materials.and perhaps.timely diagnos.ic and therapeutic endos.opic and s.rgical interventions.are important limiting factors.to favourable patient outcome. Work towards.regular provis.on and s.pply of interventional res.urces.regarding UGIB management may improve patient outcome.

关键词： Upper Gas.rointes.inal Bleeding(UGIB) Oes.phageal Varices Oes.phageal Tumor Endos.opy

Mucos.l-as.ociated invariant T cells.and oral microbiome in pers.s.ent apical periodontitis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Oral s.ience 2019年第2期11卷 131-142页

作者： Haleh Davanian Rogier Aaron Gais.r Mikael s.lfverberg Luis. W. Hugerth Michal J. s.bkowiak Liyan Lu Katie Healy Johan K. sandberg Peggy Nas.an Jorgen Karls.on Leif Jans.on Lars.Engs.rand Margaret s.llberg Chen Department of Dental Medicine Karolinska InstitutetHuddingeSweden Department of Microbiology Tumor and Cell Biology and Science for Life LaboratoryKarolinska InstitutetStockholmSweden Clinical Genomics.Facility Science for Life LaboratorySolnaSweden Department of Medicine Karolinska InstitutetHuddingeSweden Clinic of Endodontics.and Periodontology Eastman Institute StockholmStockholmSweden

Opportunis.ic bacteria in apical periodontitis.(AP) may pos. a ris. for s.s.emic ***-as.ociated invariant T (MAIT) cells.are innate-like T cells.with a broad and potent antimicrobial activity important for gut mucos.l *** was.recently s.own that MAIT cells.are pres.nt in the oral mucos.l tis.ue,but the involvement of MAIT cells.in AP is.***,comparis.n of s.rgically res.cted AP and gingival tis.ues.demons.rated that AP tis.ues.expres. s.gnificantly higher levels.of Vα7.2-Jα33,Vα7.2- Jα20,Vα7.2-Jα12,Cα and tumour necros.s.factor (TNF),interferon (IFN)-γ and interleukin (IL)-17A trans.ripts.res.mbling a MAIT cell ***,in AP tis.ues.the MR1-res.ricted MAIT cells.pos.tive for MR1–5-OP-RU tetramer s.aining appeared to be of s.milar levels.as.in peripheral blood but cons.s.ed mainly of CD4^+ *** gingival tis.ues.the AP microbiome was.quantitatively impacted by factors.like fis.ula and high patient age and had a prominent riboflavin-expres.ing bacterial *** merged in an integrated view,the examined immune and microbiome data in the s.ars. partial leas. s.uares.dis.riminant analys.s.could identify bacterial relative abundances.that negatively correlated with Vα7.2-Jα33,Cα,and IL-17A trans.ript expres.ions.in AP,implying that MAIT cells.could play a role in the local defence at the oral tis.ue *** conclus.on,we des.ribe the pres.nce of MAIT cells.at the oral s.te where trans.ocation of oral microbiota could take *** findings.have implications.for unders.anding the immune s.ns.ng of polymicrobial-related oral dis.as.s.

关键词： apical periodontitis.AP) Mucos.l-as.ociated invariant T(MAIT) AP

维普期刊数据库

s.able is.tope evidence for trophic niche partitioning in a s.uth African s.vanna rodent community

在线全文

学校读者我要写书评

暂无评论

Current Zoology 2015年第3期61卷 397-411页

作者： Jacqueline CODRON Kevin J DUFFY Nico L AVENANT Matt s.ONHEIMER Jennifer LEICHLITER Oliver PAINE Paul sandberg Daryl CODRON Ins.itute of s.s.ems.s.ience Durban University of Technology Durban South Africa Karoo Palaeontology Deparlnaent National Museum PO Box 266 Bloemfontein 9301 RSA s.hool of Mathematics Statistics and Computer Science University of KwaZulu-Natal Private Bag X01 Scottsville 3209 RSA Denartment of Mammalogv. National Mus.um. PO Box 266. Bloemfontein 9301. RSA Department of Anthropology University of Colorado at Boulder Boulder CO80309 USA Floris.ad Quaternary Res.arch Department National Museum PO Box 266 Bloemfontein 9301 RSA

s.ecies. partitioning of res.urces.remains.one of the mos. integral components.for unders.anding community as.em- bly. Analys.s.of s.able carbon and nitrogen is.topes.in animal tis.ues.has.the potential to help res.lve patterns.of partitioning be- caus. thes. proxies.repres.nt the individual＇s.diet and trophic niche, res.ectively. Us.ng free-ranging rodents.in a s.uthern Afri- can s.vanna as.a model community, we find that s.ntopic s.ecies.within habitats.occupy dis.inct is.tope niches. Moreover, s.e- cies.with s.rongly overlapping is.tope niches.did not overlap in their s.atial dis.ribution patterns. s.gges.ing an underlying effect of competitive exclus.on. Niche cons.rvatis. appears.to characterize the behaviour of mos. s.ecies.in our s.mple - with little or no obs.rved changes.acros. habitats.- with the exception of one s.ecies. Mas.omys.coucha. This.s.ecies.dis.layed a generalis. dis.ribution, being found in s.milar abundances.acros. a variety of habitats. This.s.atial pattern was.coupled with a generalis. is.tope niche that s.ifted acros. habitats. likely in res.ons. to changes.in s.ecies.compos.tion over the s.me s.atial gradient. The cas. for M. coucha s.pports.contentions.that pas. competition effects.played a s.gnificant evolutionary role in s.aping community s.ructures.of today, including the abs.nce of s.rong inters.ecific niche overlaps.within particular habitats. Our s.udy highlights.the value of s.able is.tope approaches.to help res.lve key ques.ions.in community ecology, and moreover introduces.novel ana- lytical approaches.to quantifying is.tope niche breadths.and niche overlaps.that are eas.ly comparable with traditional metrices

关键词： Competition Diet Niche breadth Niche overlap s.erkfontein Valley

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

路表纹理包络轮廓计算及其对抗滑性能的影响

长安大学学报（自然科学版） 2019年第5期39卷 11-19页

作者：冉茂平周兴林肖神清 VIEIRA Tiago sandberg Ulf 武汉科技大学汽车与交通工程学院湖北武汉430065 瑞典国家道路与运输研究所东约特兰林雪平58235 哈尔滨工业大学交通科学与工程学院黑龙江哈尔滨150090

为了分析轮胎与路表的接触特性及其对路面抗滑性能的影响,采用路面纹理测量车(road s.rface tes.er)获取路表纹理二维轮廓离散数据,运用印痕法模型,利用MATLAB软件计算路表纹理包络轮廓,进一步计算了包络轮廓对应的平均断面深度(mean pr... 详细信息

为了分析轮胎与路表的接触特性及其对路面抗滑性能的影响,采用路面纹理测量车(road s.rface tes.er)获取路表纹理二维轮廓离散数据,运用印痕法模型,利用MATLAB软件计算路表纹理包络轮廓,进一步计算了包络轮廓对应的平均断面深度(mean profile depth,MPD)、宏观纹理表面构造水平指数LMa(macro texture indices.calculated with texture level)、粗大纹理表面构造水平指数LMe(mega texture indices.calculated with texture level)等纹理指标,并与初始轮廓纹理指标进行对比;最后计算包络轮廓、初始轮廓纹理参数MPD、LMa与路面摩擦因数(longitudinal frictional coefficient,LFC)的相关性系数,分析了路表纹理包络轮廓对路面抗滑性能的影响。研究结果表明:包络轮廓纹理参数与初始轮廓纹理参数相关性良好(判定系数R2>0.85);包络轮廓MPD值较初始轮廓MPD值有明显下降,且初始轮廓MPD值越大,包络轮廓MPD值下降幅度也越大;包络轮廓表面构造水平指数较初始轮廓表面构造水平指数下降,LMa的下降幅度比LMe的下降幅度高10%左右;印痕法参数s.值对包络轮廓纹理参数有较大影响,s.越小,其对应的包络轮廓纹理参数值较初始轮廓纹理参数值下降的幅度越大;此外,包络轮廓纹理参数与摩擦因数的判定系数较初始轮廓纹理参数与摩擦因数的判定系数有较大提升,其中MPD与摩擦因数的判定系数提高了约35%,LMa与摩擦因数的判定系数提高了约23%;印痕法参数s.越小,包络纹理参数与摩擦因数的判定系数越高。该结果可为研究胎-路接触特性对路用性能的影响提供参考。

关键词：道路工程包络轮廓印痕法胎-路接触抗滑

维普期刊数据库

在线全文

学校读者我要写书评

暂无评论

腹腔镜妇科手术中输尿管的损伤

妇产与遗传（电子版） 2012年第4期2卷 55-59页

作者： Elmira Manoucheri s.rah L.Cohen Evelien M.sandberg Adam s.Kibel Jon Einars.on 周静马萨诸塞州波士顿布里格姆与妇女医院妇产科微创妇科马萨诸塞州波士顿布里格姆与妇女医院泌尿外科南方医科大学南方医院妇产科广州510515

妇科手术中腹腔镜的引入既是开创性的进步，也是新的挑战。随着越来越多的晚期病例的病理通过腹腔镜的取得，其潜在的并发症也越来越受重视，例如输尿管损伤。1971年，Engel等报道了首例腹腔镜输卵管结扎术中输尿管损伤，术后患者出现... 详细信息

妇科手术中腹腔镜的引入既是开创性的进步，也是新的挑战。随着越来越多的晚期病例的病理通过腹腔镜的取得，其潜在的并发症也越来越受重视，例如输尿管损伤。1971年，Engel等报道了首例腹腔镜输卵管结扎术中输尿管损伤，术后患者出现腰痛，被诊断为右侧输尿管损伤，必须行输尿管膀胱吻合术和Boari皮瓣修复。此后，许多研究致力于预防和处理妇科手术中的输尿管损伤。

关键词：输尿管损伤腹腔镜手术中妇科输尿管膀胱吻合术输卵管结扎术 Engel 术后患者

维普期刊数据库

多发性硬化症患者应用干扰素β-1a治疗期间的妊娠预后

在线全文

学校读者我要写书评

暂无评论

世界核心医学期刊文摘(神经病学分册) 2006年第1期 44-45页

作者： sandberg-Wollheim M. Frank D. Goodwin T.M. 谢琰臣 Department of Neurology University Hospital S-221 85 Lund Sweden Dr.

Background: Although patients.with multiple s.leros.s.(Ms.are advis.d to s.op interferon (IFN) beta-1a therapy before becoming pregnant, s.me patients.become pregnant while on treatment. Methods. We examined individual patient data from eight clinical trials.with IFNβ-1a. Res.lts. Of 3,361 women in the s.udies. 69 pregnancies.were reported, of which 41 were patients.receiving (or who had s.opped receiving within 2 weeks.prior to conception) IFNβ-1a (in utero expos.re group), 22 were patients.who dis.ontinued IFNβ-1a treatment more than 2 weeks.before conception (previous.expos.re group), and s.x were patients.receiving placebo. The 41 in utero expos.re pregnancies.res.lted in 20 healthy full-term infants. one healthy premature infant, nine induced abortions. eight s.ontaneous.abortions. one fetal death, and one congenital anomaly (hydrocephalus.. One patient was.los. to follow-up. The 22 previous.expos.re pregnancies.res.lted in 20 full-term healthy infants. one healthy premature infant, and one birth-related congenital anomaly (Erb pals.) Conclus.ons. The majority (21/31) of pregnancies.that had the potential to go to full term produced healthy infants. The rate of s.ontaneous.abortion was.higher, but not s.gnificantly s., in the in utero expos.re group compared to general population es.imates. Until more expos.re data become available, patients.remain advis.d to s.op IFNβtherapy before becoming pregnant.

关键词：多发性硬化症患者干扰素抗病毒药