检索结果-南通市图书馆

儿童与青少年肺部超短回波时间MRI:CT平扫和标准T1WI增强MRI的比较

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

国际医学放射学杂志 2022年第3期 366-366页

作者： D.M.Renz k.h.herrmann M.kraemer J.Boettcher M.Waginger P.C.krueger 邢志珩

摘要目的比较超短回波时间(UTE)MRI与诊断金标准的胸部CT以及2个T1WI增强序列对儿童肺部病变的诊断价值。方法 23例确诊肺部肿瘤病人[男14例，女9例；平

关键词：

平面回波成像(EPI)和半傅里叶单激发扰相快速自旋回波(hASTE)扩散技术乳腺MR(MRM)扩散-加权成像(DWI)的临床比较研究

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

国际医学放射学杂志 2009年第5期32卷 505-505页

作者： P.A.T.Baltzer D.M.Renz k.h.herrmann M.Dietzel I.krumbein M.Gajda 秦乃姗 Institute of Diagnostic and Interventional Radiology Friedrich-Schiller-University JenaErlanger Allee 10107740 JenaGermany

扩散加权成像（DWI）技术具有鉴别肿瘤良恶性的潜在能力。然而常规条件下使用DWI的诊断意义尚不明确。本研究以病灶可见度、表观扩散系数（ADC）的测量和病灶大小的估计为参数，比较了平面回波成像（EPI）和半傅里叶单激发扰相快速自旋... 详细信息

扩散加权成像（DWI）技术具有鉴别肿瘤良恶性的潜在能力。然而常规条件下使用DWI的诊断意义尚不明确。本研究以病灶可见度、表观扩散系数（ADC）的测量和病灶大小的估计为参数，比较了平面回波成像（EPI）和半傅里叶单激发扰相快速自旋回波（hASTE）2种技术的DWI。65例病人接受了EPI-DWI和hASTE-DWIMRM（1．5T）检查。

关键词：乳腺新生物 MRI 扩散加权成像敏感性和特异性

Incidence of urinary incontinence followingendoscopic laser enucleation of the prostate byen-bloc and non-en-bloc techniques:a multicenter,real-world experience of 5068 patients

在线全文

学校读者我要写书评

暂无评论

Asian Journal of Andrology 2024年第3期26卷 233-238页

作者： Daniele Castellani Vineet Gauhar khi Yung Fong Mario Sofer Moisés Rodríguez Socarrás Azimdjon N Tursunkulov Lie kwok Ying Sarvajit Biligere ho Yee Tiong Dean Elterman Abhay Mahajan Mark Taratkin Sorokin Nikolai Ivanovich Tanuj Pal Bhatia Dmitry Enikeev Nariman Gadzhiev Mohammed Taif Bendigeri Jeremy Yuen-Chun Teoh Marco Dellabella Fernando Gómez Sancha Bhaskar kumar Somani Thomas Reinhard William herrmann Urology Unit IRCCS INRCAAncona 60127Italy Urology Unit Marche University HospitalLe Marche Polytechnic UniversityAncona 60126Italy Departmentof Urology Ng Teng Fong General HospitalSingapore 609606Singapore Yong Loo Lin School of Medicine National University of SingaporeSingapore 117597Singapore Department of Urology Tel Aviv Sourasky Medical CenterAffiliated to the Sackler School of MedicineTel Aviv UniversityTel Aviv 6423906Israel Department of Urology and Robotic Surgery ICUA-Clínica CEMTROMadrid 28701Spain Urology Division AkfaMedline HospitalTashkent 100211Uzbekistan Advanced Urology Gleneagles HospitalSingapore 258499Singapore Department of Urology National University HospitalSingapore 119228Singapore Divisionof Urology Department of SurgeryUniversity of TorontoOntarioToronto M5G 2C4Canada Department of Urology Mahatma Gandhi Mission’s Medical College andHospitalAurangabad 431003India Institute for Urology and Reproductive health Sechenov UniversityMoscow119435Russian Federation Department of Urologyand Andrology Lomonosov Moscow State UniversityMoscow 119992Russian Federation Department of Urology Sarvodaya Hospital and Research CentreFaridabadHaryana 121006India Department of Urology Medical University of ViennaVienna 1090Austria Department of Urology Saint-Petersburg State University HospitalSaint-Petersburg 199034Russian Federation Department of Urology Asian Institute of Nephrology and UrologyHyderabad 500082India S.h.ho UrologyCentre Department of SurgeryFaculty of MedicineThe Chinese University of Hong KongHong Kong 96H2+Q9China Department of Urology University HospitalsSouthampton NHS TrustSouthampton SO166YDUnited Kingdom Department of Urology Cantonal Hospital Thurgau AGFraunfeld 8500Switzerland.

We aim to evaluate the incidence of incontinence following laser endoscopic enucleation of the prostate(EEP)comparing en-bloc(Group 1)versus 2-lobe/3-lobe techniques(Group 2).We performed a retrospective review of patients undergoing EEP for benign prostaticenlargement in 12 centers between January 2020 and January 2022.Data were presented as median and interquartile range(IQR).Univariable and multivariable logistic regression analysis was performed to evaluate factors associated with stress urinary incontinence(SUI)and mixed urinary incontinence(MUI).There were 1711 patients in Group 1 and 3357 patients in Group 2.Patients in Group 2were significantly younger(68[62–73]years vs 69[63–74]years,P=0.002).Median(interquartile range)prostate volume(PV)wassimilar between the groups(70[52–92]ml in Group 1 vs 70[54–90]ml in Group 2,P=0.774).There was no difference in preoperativeInternational Prostate Symptom Score,quality of life,or maximum flow rate.Enucleation,morcellation,and total surgical time weresignificantly shorter in Group 1.Within 1 month,overall incontinence rate was 6.3%in Group 1 versus 5.3%in Group 2(P=0.12),and urge incontinence was significantly higher in Group 1(55.1%vs 37.3%in Group 2,Phs,the overall rate ofincontinence was 1.7%in Group 1 versus 2.3%in Group 2(P=0.06),and SUI was significantly higher in Group 2(55.6%vs 24.1%in Group 1,P=0.002).At multivariable analysis,PV and IPSS were factors significantly associated with higher odds of transient SUI/MUI.PV,surgical time,and no early apical release technique were factors associated with higher odds of persistent SUI/MUI.

关键词： benign prostatic hyperplasia en-bloc enucleation endoscopic enucleation of the prostate laser therapy stress urinaryincontinence urge urinary incontinence

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

不稳定大气边界层下风沙流的大涡模拟

Science Bulletin 2022年第14期67卷 1421-1424,M0003页

作者：何盼莉张洁 hans J.herrmann 黄宁 key Laboratory of Mechanics on Disaster and Environment in Western China Lanzhou UniversityLanzhou 730000China College of Civil Engineering and Mechanics Lanzhou UniversityLanzhou 730000China Department 403 Rocket Force University of EngineeringXi’an 710025China Laboratoire de Physique et Mécanique des Milieux hétérogènes École Supérieure de Physique et de Chimie Industrielles de la Ville de ParisParis 75005France Departamento de Física Universidade do CearáFortaleza 60020-181Brazil

在干旱半干旱地区风沙运动频繁发生,大气多为不稳定层结条件.目前大多数关于风沙运动的研究主要基于中性或近中性层结条件,这与自然实际存在偏差.因此,本文使用大涡模拟耦合拉格朗日粒子追踪方法建立了考虑大气层结的风沙运动模型.结果... 详细信息

在干旱半干旱地区风沙运动频繁发生,大气多为不稳定层结条件.目前大多数关于风沙运动的研究主要基于中性或近中性层结条件,这与自然实际存在偏差.因此,本文使用大涡模拟耦合拉格朗日粒子追踪方法建立了考虑大气层结的风沙运动模型.结果表明,当风速接近颗粒起动阈值时,不稳定层结对输沙率有显著影响,但随着风速的增大,这种影响逐渐减弱.为了更好地表征层结稳定度对输沙率的影响,本文提出了有效地表剪切应力参数,该参数包含颗粒起动阈值和地表剪切应力分布的信息.分析表明,有效地表剪切应力的大小与初始风速和对流速度尺度有关,且与输沙率满足线性关系.

关键词：大涡模拟剪切应力风沙运动风沙流大气边界层输沙率线性关系对流速度

Dual-radical-based molecular anisotropy and synergy effect of semi-conductivity and valence tautomerization in a photoswitchable coordination polymer

在线全文

学校读者我要写书评

暂无评论

National Science Review 2023年第6期10卷 200-214页

作者： Jing-Wei Dai Yu-Qin Li Zhao-Yang Li hai-Tao Zhang Carmen herrmann Shohei kumagai Marko Damjanovi? Markus Enders hiroyuki Nojiri Masakazu Morimoto Norihisa hoshino Tomoyuki Akutagawa Masahiro Yamashita State key Laboratory of Medicinal Chemical Biology Nankai University School of Materials Science and Engineering Nankai University Institute of Inorganic and Applied Chemistry University of Hamburg Department of Chemistry Graduate School of Science Tohoku University Institute of Inorganic Chemistry University of Heidelberg Institute for Materials Research Tohoku University Department of Chemistry Rikkyo University Institute of Multidisciplinary Research for Advanced Materials (IMRAM) Tohoku University

Organic radicals are widely used as linkers or ligands to synthesize molecular magnetic materials.however,studies regarding the molecular anisotropies of radical-based magnetic materials and their multifunctionalities are rare.herein,a photoisomerizable diarylethene ligand was used to form{[CoⅢ(3,5-DTSQ·-)(3,5-DTCat2-)]2(6F-DAE-py2)}·3Ch3CN·h2O(o-1·3Ch3CN·h2O,6F-DAE-py2=1,2-bis(2-methyl-5-(4-pyridyl)-3-thienyl)perfluorocyclopentene),a valence-tautomeric(VT) coordination polymer.We directly observed dual radicals for a single crystal using high-field/-frequency(～13.3 T and～360 Ghz) electron paramagnetic resonance(EPR) spectroscopy along the c-axis,which was further confirmed by angle-dependent Q-band EPR spectroscopy.Moreover,a conductive anomaly close to the VT transition temperature was observed only when probes were attached at the ab plane of the single crystal,indicative of synergy between valence tautomerism and conductivity.Structural anisotropy studies and density functional theory(DFT) calculations revealed that this synergy is due to electron transfer associated with valence tautomerism.This study presents the first example of dual-radical-based molecular anisotropy and charge-transfer-induced conductive anisotropy in a photoswitchable coordination polymer.

关键词： valence tautomerization charge transfer photo switching diradical coordination polymer

Environmental photocatalysis:Perspectives for China

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2010年第9期53卷 1831-1843页

作者： herrmann Jean Marie Institut de Recherches sur la Catalyse et l'Environnement de Lyon UMR 5256 CNRS/Université Lyon1 2 Av.Albert Einstein 69626 Villeurbanne Cedex

Photocatalysis is based on the double aptitude of the photocatalyst(essentially titania) to simultaneously adsorb reactants and absorb efficient photons.heterogeneous photocatalysis is able to be efficient in Fine,"Green" and Environmental Chemistry.Photocatalysis induces mild oxidations in the absence of water by generating active neutral atomic O* species.For instance,the oxidation of 4-tert-butyl-toluene is 100% selective in 4-tert-butyl-benzaldehyde.In water treatment,many toxic inorganic ions are oxidized in their harmless upper oxidized state.The elimination of organic pollutants is the main field of water photocatalytic decontamination.Most of aliphatic and aromatic pollutants are totally mineralized into CO2 and innocuous inorganic anions.More complex molecules,such as pesticides(herbicides,insecticides,fungicides,etc.) or dyes,are totally destroyed.Another example of green chemistry is the total degradation of dyes in water,in particular for the azo-dyes,with 100% selective degradation of -N=N-azo-groups into di-nitrogen.Photocatalysis is also active in the "bio-world" by killing bacteria(E.Coli,streptococcus,etc.) in water without re-growth.Air pollutants can also be destroyed,especially all the VOC's(volatile organic compounds),providing certain air humidity enabling titania to produce cracking Oh* radicals.For chemical engineering reasons,the photocatalyst has to be fixed on a photo-inert support.In these conditions,UV-irradiated titania-based photocatalysis could be applied to the elimination of air pollutants,VOC's,solvents,odors,chemicals,etc.Air treatment has to be associated with water and solid waste treatment because of odors.This is conducted by covering water treatment ponds or lagunas by rafts on which large sheets of Ahlstrom paper are deposited,supporting titania associated with activated carbon.Eventually,virus Ah5N2,a model virus close to h5N1,responsible for the avian flu could be totally inactivated.Photocatalysis is directly connected with all 12 principles of Green Chemistry defined

关键词： photocatalysis green chemistry environmental chemistry air pollutants water pollutants solar energy China

Performance and calibration of quark/gluon-jet taggers using 140 fb^(-1) of pp collisions at √s=13 TeV with the ATLAS detector

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2024年第2期48卷 1-25页

作者： G. Aad B. Abbott k. Abeling N.J. Abicht S.h. Abidi A. Aboulhorma h. Abramowicz h. Abreu Y. Abulaiti B.S. Acharya C. Adam Bourdarios L. Adamczyk S.V. Addepalli M.J. Addison J. Adelman A. Adiguzel T. Adye A.A. Affolder Y. Afik M.N. Agaras J. Agarwala A. Aggarwal C. Agheorghiesei A. Ahmad F. Ahmadov W.S. Ahmed S. Ahuja X. Ai G. Aielli A. Aikot M. Ait Tamlihat B. Aitbenchikh I. Aizenberg M. Akbiyik T.P.A. Åkesson A.V. Akimov D. Akiyama N.N. Akolkar k. Al khoury G.L. Alberghi J. Albert P. Albicocco G.L. Albouy S. Alderweireldt M. Aleksa I.N. Aleksandrov C. Alexa T. Alexopoulos F. Alfonsi M. Algren M. Alhroob B. Ali h.M.J. Ali S. Ali S.W. Alibocus M. Aliev G. Alimonti W. Alkakhi C. Allaire B.M.M. Allbrooke J.F. Allen C.A. Allendes Flores P.P. Allport A. Aloisio F. Alonso C. Alpigiani M. Alvarez Estevez A. Alvarez Fernandez M. Alves Cardoso M.G. Alviggi M. Aly Y. Amaral Coutinho A. Ambler C. Amelung M. Amerl C.G. Ames D. Amidei S.P. Amor Dos Santos k.R. Amos V. Ananiev C. Anastopoulos T. Andeen J.k. Anders S.Y. Andrean A. Andreazza S. Angelidakis A. Angerami A.V. Anisenkov A. Annovi C. Antel M.T. Anthony E. Antipov M. Antonelli F. Anulli M. Aoki T. Aoki J.A. Aparisi Pozo M.A. Aparo L. Aperio Bella C. Appelt A. Apyan N. Aranzabal S.J. Arbiol Val C. Arcangeletti A.T.h. Arce E. Arena J-F. Arguin S. Argyropoulos J.-h. Arling O. Arnaez h. Arnold G. Artoni h. Asada k. Asai S. Asai N.A. Asbah J. Assahsah k. Assamagan R. Astalos S. Atashi R.J. Atkin M. Atkinson h. Atmani P.A. Atmasiddha k. Augsten S. Auricchio A.D. Auriol V.A. Austrup G. Avolio k. Axiotis G. Azuelos D. Babal h. Bachacou k. Bachas A. Bachiu F. Backman A. Badea P. Bagnaia M. Bahmani A.J. Bailey V.R. Bailey J.T. Baines L. Baines O.k. Baker E. Bakos D. Bakshi Gupta V. Balakrishnan R. Balasubramanian E.M. Baldin P. Balek E. Ballabene F. Balli L.M. Baltes W.k. Balunas J. Balz E. Banas M. Bandieramonte A. Bandyopadhyay S. Bansal L. Barak M. Barakat E.L. Barberio D. Barberis M. Barbero M.Z. Barel k.N. Barends T. Barillari M-S. Barisits T. Barklow P. Baron D.A. Baron Mo The ATLAS Collaboration

The identification of jets originating from quarks and gluons,often referred to as quark/gluon tagging,plays an important role in various analyses performed at the Large hadron Collider,as Standard Model measurements and searches for new particles decaying to quarks often rely on suppressing a large gluon-induced background.This paper describes the measurement of the efficiencies of quark/gluon taggers developed within the ATLAS Collaboration,using √s=13 TeV proton–proton collision data with an integrated luminosity of 140 fb^(-1) collected by the ATLAS experiment.Two taggers with high performances in rejecting jets from gluon over jets from quarks are studied:one tagger is based on requirements on the number of inner-detector tracks associated with the jet,and the other combines several jet substructure observables using a boosted decision tree.A method is established to determine the quark/gluon fraction in data,by using quark/gluon-enriched subsamples defined by the jet pseudorapidity.Differences in tagging efficiency between data and simulation are provided for jets with transverse momentum between 500 GeV and 2 TeV and for multiple tagger working points.

关键词： ATLAS JET QUARk GLUON TAGGING

Predictors of surgical complications in boys with hypospadias:data from an international registry

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

World Journal of Pediatric Surgery 2023年第4期6卷 217-223页

作者： kathryn Scougall Jillian Bryce Federico Baronio Rachel L Boal Jose Roberto Castera Sebastián Castro Tim Cheetham Eduardo Correa Costa Feyza Darendeliler Justin h Davies Mirjam Dirlewanger Gabriella Gazdagh Evgenia Globa Gil Guerra-Junior Tulay Guran Gloria herrmann Paul-Martin holterhus Ahsen karagözlüAkgül Renata Markosyan kenneth McElreavey Marcio Lopes Miranda Anna Nordenstrom Stuart O’Toole Sukran Poyrazoglu Gianni Russo Valerie Schwitzgebel Marianna Stancampiano Michael Steigert S Faisal Ahmed Angela k Lucas-herald University of Glasgow GlasgowUK IRCCS Azienda Ospedaliero-Universitaria di Bologna Policlinico S Orsola BolognaItaly Great North Children's hospital Newcastle Upon TyneUK hospital de Ninos Ricardo Gutiérrez Buenos AiresArgentina hospital de Clinicas de Porto Alegre Porto AlegreBrazil Istanbul University IstanbulTurkey Southampton Children's hospital SouthamptonUK University hospital of Geneva GenevaSwitzerland Ukrainian Research Center of Endocrine Surgery Endocrine Organs and Tissue Transplantation KyivUkraine State University of Campinas CampinasBrazil Marmara University IstanbulTurkey University Medical Centre UlmGermany University hospital of Schleswig-holstein Campus kiel/Christian-Albrechts-University of kiel KielGermany Marmara University Faculty of Medicine IstanbulTurkey Yerevan State Medical University Endocrinology Clinic YerevanArmenia Institut Pasteur ParisFrance karolinska University hospital StockholmSweden Royal hospital for Children GlasgowUK IRCCS Ospedale San Raffaele MilanoItaly Graubunden Cantonal hospital ChurSwitzerland

Background Complications are frequently reported after hypospadias repair and there is a need to understand the factors that influence their occurrence.Methods Data from boys with hypospadias born between 2000 and 2020 were obtained from the International Disorders of Sex Development(l-DSD)Registry.Logistic regressions,fisher's exact tests and spearman's correlation tests were performed on the data to assess associations between clinical factors and complication rates.Results Of the 551 eligible boys,data were available on 160(29%).Within the cohort,the median(range)External Masculinization Score(EMS)was 6(2,9).All presented with one or more additional genital malformation and 61(38%)presented with additional extragenital malformations.Disorders of androgen action,androgen synthesis and gonadal development were diagnosed in 28(18%),22(14%)and 9(6%)boys,respectively.The remaining 101(62%)patients were diagnosedas having non-specific 46,XY Disorders of Sex Development.Eighty(50%)boys had evidence of abnormal biochemistry,and gene variants were identified in 42(26%).Median age at first hypospadias surgery was 2 years(0,9),and median length of follow-up was 5 years(0,17).Postsurgical complications were noted in 102(64%)boys.There were no significant associations with postsurgical complications.Conclusions Boys with proximal hypospadias in the I-DSD Registry have high rates of additional comorbidities and a high risk of postoperative complications.No clinical factors were significantly associated with complication rates.high complication rates with no observable cause suggest the involvement of other factors which need investigation.

关键词： complications surgical involvement

Modeling slow deformation of polygonal particles using DEM

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

Particuology 2008年第6期6卷 506-514页

作者： Andrés A. Pea Pedro G. Lind hans J. herrmann Institute for Computational Physics Universitt Stuttgart Computational Physics IfB HIF E12 ETH Hnggerberg CH-8093 Zrich Switzerland Departamento de Física Universidade Federal do Ceará

We introduce two improvements in the numerical scheme to simulate collision and slow shearing of irregular particles. First, we propose an alternative approach based on simple relations to compute the frictional contact forces. The approach improves efficiency and accuracy of the Discrete Element Method （DEM） when modeling the dynamics of the granular packing. We determine the proper upper limit for the integration step in the standard numerical scheme using a wide range of material parameters. To this end, we study the kinetic energy decay in a stress controlled test between two particles. Second, we show that the usual way of defining the contact plane between two polygonal particles is, in general, not unique which leads to discontinuities in the direction of the contact plane while particles move. To solve this drawback, we introduce an accurate definition for the contact plane based on the shape of the overlap area between touching particles, which evolves continuously in time.

关键词： Granular media Discrete element method Slow deformation Contact forces