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STUDY ON DYNAMIC J-INTEGRAL Of.MECHANICAL HETEROGENEOUS WELDED JOINT

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Acta Metallurgica Sinica(English Letters) 2004年第6期17卷 934-939页

作者： f.Q.Tian D.Y.He X.Y.Li Y.W.Shi D.Zhang Instituteof.ompositeMaterials ShanghaiJiaotongUniversityShanghai200030China Schoolof.aterialsScienceandEngineering BeijingPolytechnicUniversityBeijing100022China

Welded joint is a mechanical heterogeneous body, and mechanical heterogeneity has great ef.ect on dynamic f.acture behaviour of.welded joints. In the present investigation, dynamic response curve and dynamic J-integral of.practical undermatched welded joint and whole base and whole weld three-point-bend (TPB) models containing longitudinal crack are com- puted. Dynamic J-integral is evaluated using virtual crack extension (VCE) method and the computation is perf.rmed using MARC f.nite element code. Because of.the ef.ect of.inertia, dynamic load response curve of.computed model waves periodically. Dynamic J-integral evaluated by VCE method is path independent. The ef.ect of.inertia has little inf.uence on dynamic J-integral curve. The value of.dynamic J-integral of.undermatched welded joint is lower than that of.whole base metal and higher than that of.whole weld metal. The results establish the f.undation of.saf.ty evaluation f.r dynamic loaded welded structures.

关键词： virtual crack extension welded joint dynamic response curve dynamic J-integral

西班牙猛禽生态毒理学:持久性环境污染物综述

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AMBIO－人类环境杂志 2008年第6期37卷 414-421页

作者： Antonio J.García-f.rnández José f.Calvo emma Martínez-López Pedro María-Mojica José E.Martínez 高孟绪西班牙穆尔西亚(Murcia)大学

在西班牙进行环境污染物对猛禽种群压力的最早研究可追溯到20世纪80年代,通过多种角度使用多种前哨猛禽物种。然而,由于没有国家的监测计划,所以研究无论在时间或是空间上都是零星的。对金属的暴露并没有随着时间的推移变化,但存于卵和... 详细信息

在西班牙进行环境污染物对猛禽种群压力的最早研究可追溯到20世纪80年代,通过多种角度使用多种前哨猛禽物种。然而,由于没有国家的监测计划,所以研究无论在时间或是空间上都是零星的。对金属的暴露并没有随着时间的推移变化,但存于卵和组织中的铅浓度有所减少。一般来说,在西班牙猛禽样本中检测到的金属浓度通常很低,不足以产生毒副作用。除DDT和DDE,在过去的20年中西班牙猛禽类中大部分以有机氯为基础的杀虫剂已经减少。在几个不同物种的卵中所发现的DDE浓度可以部分地解释在西班牙猛禽能够成功繁殖的原因。

关键词：环境污染物猛禽类西班牙生态毒理学持久性综述金属浓度毒副作用

f.ee electron lasers driven by plasma accelerators:status and near-term prospects

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High Power Laser Science and Engineering 2021年第4期9卷 112-126页

作者： C.emma J.Van Tilborg R.Assmann S.Barber A.Cianchi S.Corde M.E.Couprie R.D'Arcy M.f.rrario A.f.Habib B.Hidding M.J.Hogan C.B.Schroeder A.Marinelli M.Labat R.Li J.Liu A.Loulergue J.Osterhof. A.R.Maier B.W.J.Mc Neil W.Wang SLAC National Accelerator Laboratory Menlo ParkCA 94025USA BELLA Center Lawrence Berkeley National LaboratoryBerkeleyCA 94720USA Deutsches Elektronen-Synchrotron DESY 22607 HamburgGermany INf.-LNf 00044 FrascatiItaly LOA ENSTA ParisCNRSEcole PolytechniqueInstitut Polytechnique de Paris91762 PalaiseauFrance Synchrotron SOLEIL L'Orme des MerisiersSaint-Aubin91192 Gif-sur-YvetteFrance Scottish Centre f.r the Application of.Plasma-Based Accelerators SCAPA Department of PhysicsUniversity of StrathclydeScottish Universities Physics Alliance SUPAGlasgow G11XQUK Shanghai Institute of.Optics and f.ne Mechanics Chinese Academy of SciencesShanghai 201800China Department of.Physics University of StrathclydeScottish Universities Physics Alliance SUPAGlasgow G1IXQUK Cockcrof. Institute Warrington WA44ADUK

Owing to their ultra-high accelerating gradients,combined with injection inside micrometer-scale accelerating wakef.eld buckets,plasma-based accelerators hold great potential to drive a new generation of.f.ee-electron lasers(f.Ls).Indeed,the f.rst demonstration of.plasma-driven f.L gain was reported recently,representing a major milestone f.r the *** groups around the world are pursuing these novel light sources,with methodology varying in the use of.wakef.eld driver(laser-driven or beam-driven),plasma structure,phase-space manipulation,beamline design,and undulator technology,among *** paper presents our best attempt to provide a comprehensive overview of.the global community ef.orts towards plasma-based f.L research and development.

关键词： plasma accelerators f.ee electron lasers novel light sources

先天性巨结肠的诊断:关于常用检测方法准确性对比的前瞻性研究

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世界核心医学期刊文摘（儿科学分册） 2006年第2期2卷 23-24页

作者： De Lorijn f. Reitsma J.B. Voskuijl W.P. 郭战宏 Department of.Pediatric Gastroenterology and Nutrition Emma Children' s Hospital AMC/Academic Medical CenterMeibergdreef 9 1105AZ Amsterdam Netherlands Dr.

Objective: To compare the diagnostic accuracy of.contrast enema (CE), anorectal manometry (ARM), and rectal suction biopsy (RSB) f.r the detection of.Hirschsprung’ s disease (HD). Study design: f.llowing a prospective pro-tocol, inf.nts suspected of.HD underwent all 3 index tests. Children with positive results on 2 or more index tests or who continued to have severe bowel problems underwent a f.ll thickness biopsy as ref.rence standard. Clinical f.llow-up was the ref.rence standard in all other children. Results: Between 2000 and 2003, 111 consecutive patients (67 boys; median age, 5.3 months) in whom HD was suspected were enrolled. HD was f.und in 28 patients. RSB had the highest sensitivity (93% ) and specif.city (100% ) rates, but values were not signif.cantly dif.erent f.om CE (sensitivity, 76% ; specif.city, 97% ) or f.om ARM (sensitivity, 83% ; specif.city, 93% ). Inconclusive test results occurred in 8 inf.nts with CE, in 15 inf.nts with ARM because of.agitation, and in 2 inf.nts with RSB. Conclusion: RSB is the most accurate test f.r diagnosing HD, and it has the lowest rate of.inconclusive test results.

关键词：诊断准确性先天性巨结肠检测结果前瞻性研究肛门直肠测压肠道功能障碍显著性差异敏感性灌肠造影阳性结果

Children’s growth and motor development f.llowing a severe burn:a systematic review

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Burns & Trauma 2023年第1期11卷 349-360页

作者： Maxime D.Cuijpers Martin G.A.Baartmans Paul P.M.van Zuijlen Johannes C.f.Ket Anouk Pijpe Red Cross Hospital Burn Centre BeverwijkVondellaan 13BeverwijkThe Netherlands Amsterdam University Medical Centre Location VU University Medical CentreDepartment of PlasticReconstructiveand Hand SurgeryAmsterdam Movement Sciencesde Boelelaan 1117AmsterdamThe Netherlands Association of.Dutch Burn Centres Zeestraat 27-29BeverwijkThe Netherlands Maasstad Hospital Department of PaediatricsMaasstadweg 21Rotterdam3079 DZThe Netherlands Red Cross Hospital Department of Plastic SurgeryReconstructive and Hand SurgeryVondellaan 13Beverwijk1942 LEThe Netherlands Paediatric Surgical Centre Emma Children’s HospitalAmsterdam UMCUniversity of AmsterdamVrije UniversiteitMeibergdreef 9Amsterdam1105 AZThe Netherlands Medical Library Vrije Universiteitde Boelelaan 1117AmsterdamThe Netherlands

Background:The epidemiological data on post-burn growth,body composition and motor devel-opment is ambiguous and *** aim of.this systematic review was theref.re to summarize the current body of.evidence on post-burn growth,body composition and motor development in ***:A literature search was conducted in PubMed,EMBASE and Web of.Science up to March *** considered observational studies that reported(1)metrics on weight,height,body composition,bone mineral content,bone mineral density or motor development,in(2)paediatric burn patients and(3)published in a peer-reviewed ***:A total of.16 studies were *** of.the included studies used quantitative methods,but with dif.ering methodology:prospective cohort studies(n=8),retrospective chart reviews(n=3),case-control studies(n=2),cross sectional studies(n=2)and a retrospective cohort study(n=1).When combined,the included studies represented 2022 paediatric burn patients,with a mean age of.7.7(±3.2)*** average burn sizewas 52.8%(±12.7)of.the total body surf.ce *** outcome measures included weight(n=12),height(n=7),muscular strength(n=4),bone mineral content(n=5),bone mineral density(n=5),body mass index(n=3),f.t mass(n=5),lean body mass(n=7)and f.ne and gross motor development(n=1).Conclusions:f.llowing an initial decline,patients’growth and motor development started to recover during the f.rst or second year ***,burns may have a prof.und and prolonged ef.ect on the paediatric burn patients’muscular strength,bone mineral content and lean body *** should be noted that the vast majority of.studies included only patients with burns covering≥30%total body surf.ce *** evidence presented in this review may thus not be representative of.the whole paediatric burn population.

关键词： Burns Children Weight Height Bone Muscle Motor f.nction

The Inf.uence of.Pain: Quality of.Lif. af.er <i>Pectus excavatum</i>Correction

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Open Journal of.Pediatrics 2014年第3期4卷 216-221页

作者： Wietse P. Zuidema Alida f. W. van der Steeg Jan W. A. Oosterhuis Christien Sleeboom Stef.n M. van der Heide Elly S. M. de Lange-de Klerk Hugo A. Heij Department of.Cardio-Thoracic Surgery Radboud University Medical Center Nijmegen The Netherlands Department of.Epidemiology and Biostatistics VU University Medical Center Amsterdam The Netherlands Department of.Surgery VU University Medical Center Amsterdam The Netherlands Pediatric Surgical Center of.Amsterdam Emma Children’s Hospital AMC and VU University Medical Center Amsterdam The Netherlands

Introduction: The main indication f.r surgery of.thoracic wall def.rmities (TWD) is psychological due to cosmetic complaints. The assumption is that appearances have a negative ef.ect on?self.esteem and quality of.lif.?(QoL). Correction should result in improvement. Methods: Prospective trial. QoL was assessed using the?CHQ and the WHOQOL-bref. Measurements were taken bef.re surgery (T1) and 6 weeks thereaf.er (T2). Results: f.rty-two patients were included.?WHOQOL-bref.showed dif.erences between pre-operative and?six weeks past surgery on f.cet body image (p = 0.003).?Self.esteem (CHQ) did not show a signif.cant improvement at T2.?Concerning the scores on the single step questionnaire (SSQ),?33 patients were “very” to “extremely satisf.ed” with appearance and increased self.esteem (p f.cant change (p f.er surgical correction of.a TWD satisf.ction with the “new” chest is good;pain seems to be a problem with possible negative inf.uence on self.esteem.

关键词： Pain Quality of Lif. (Qol) Pectus Chest Wall Def.rmity

病例对照研究:儿科重症监护室内长期滞留患儿的特征及预后

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世界核心医学期刊文摘（儿科学分册） 2005年第3期1卷 12-13页

作者： VanDer Heide Ph.A. Hassing M. B. f. Gemke R.J.B.J. 李开 Department of.Neonatology Emma Children's Hospital Academic Medical Center Meibergdreef 9 ML-1105 AZ AmsterdamNetherlands

目的:入住儿科重症监护室的患者,有时尽管诊断相同,但滞留时间却不同,本文对比研究儿科重症监护室内长期滞留患儿和其他患儿的差异,对比内容包括: 患病初发特征及预后情况。方法:收集过去6年内所有入住儿科重症监护室、年龄在1-18岁且... 详细信息

目的:入住儿科重症监护室的患者,有时尽管诊断相同,但滞留时间却不同,本文对比研究儿科重症监护室内长期滞留患儿和其他患儿的差异,对比内容包括: 患病初发特征及预后情况。方法:收集过去6年内所有入住儿科重症监护室、年龄在1-18岁且监护达30 d 以上的患者病例,进行回顾性分析。长期滞留患者为病例组,其他进入儿科重症监护病房且与病例组诊断相同的患者为对照组,对比分析两组情况。

关键词：儿科重症监护室病例对照研究患者病例滞留时间器官系统机体功能对比分析衰竭状态评测指标

中低速率输注瑞芬太尼不改变脑电双频指数监测下维持麻醉所需靶控输注丙泊酚的浓度

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麻醉与镇痛 2008年第2期4卷 46-52页

作者： Lars P. Wang Peter McLoughlin Michael J. Paech Irina Kurowski emma L. Brandon 包睿(译) 邓小明(校) Department of.Anaesthesia and Pain Medidne Royal Perth Hospital Perth Western AustraliaAustralia Pharmacology and Anaesthesiology Unit School of Medicine and PharmacologyUniversity. of Western Australia Perth Western Australia Australia 不详

背景本文旨在观察不同速率输注瑞芬太尼是否会降低使脑电双频指数（bispectral index，BIS）≤50的丙泊酚EC50（半数有效浓度）值。方法将72例ASA分级Ⅰ或Ⅱ级拟行气管内插管并靶控输注（TCI）丙泊酚维持麻醉的成人患者，随机分为6组。... 详细信息

背景本文旨在观察不同速率输注瑞芬太尼是否会降低使脑电双频指数（bispectral index，BIS）≤50的丙泊酚EC50（半数有效浓度）值。方法将72例ASA分级Ⅰ或Ⅱ级拟行气管内插管并靶控输注（TCI）丙泊酚维持麻醉的成人患者，随机分为6组。瑞芬太尼输注速率分别为：B组0．1μg·kg^-1·min^-1,C组0．15μg·kg^-1·min^-1,D组0．2μg·kg^-1·min^-1,E组0．3μg·kg^-1·min^-1,f.0．4μg·kg^-1·min^-1,A组作为对照组不使用瑞芬太尼。在同一浓度瑞芬太尼组中，以第1例患者对TCI4μg/ml丙泊酚的反应决定岳一例患者的效应室浓度（Dixon的“序贯法”）。如果BIS〉50，后一例患者TCI丙泊酚的效应室浓度增加，如果BIS≤50，后一例患者TCI丙泊酚的效应室浓度则减少。同时研究了联合用药的血流动力学效应。结果EC50变化范围为2．4-2．9μg/ml.未发现瑞芬太毫对丙泊酚EC50的累加效应。但是未使用瑞芬太尼的空白对照组对丙泊酚的反应差异较大。使用瑞芬太尼组患者心率下降。结论瑞芬太昆输注不会减少无刺激麻醉患者丙泊酚需求量。在联合输注瑞芬太尼时不应当降低丙泊酚TCI浓度．

关键词：脑电双频指数监测半数有效浓度瑞芬太尼靶控输注维持麻醉丙泊酚低速率效应室浓度

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妇科扩张器

设计 2017年第12期30卷 18-页

作者： emma 无不详 design intelligence award

荧光型一次性无菌阴道扩张器主要通过创造适宜的光环境改善宫颈疾病的诊断条件.巧妙的将照明光源采用独立模块化设计,以插入式安装在扩张器手柄上,在临床使用过程中不接触人体,避免了阴道内分泌物等液体对电路的影响与重复使用带来的交... 详细信息

荧光型一次性无菌阴道扩张器主要通过创造适宜的光环境改善宫颈疾病的诊断条件.巧妙的将照明光源采用独立模块化设计,以插入式安装在扩张器手柄上,在临床使用过程中不接触人体,避免了阴道内分泌物等液体对电路的影响与重复使用带来的交叉感染,无需消毒可重复使用.BiLED光源通过弯曲导光条从手柄向前端传导光线,因此无后射光线对医生形成眩光效应.隐藏式光源也为前段的操作面提供更大的空间.在扩张器上叶设计了与f.0吸引管配合的导向口,能够将治疗过程中产生的烟雾迅速排出,不影响医生视野.

关键词：扩张器光源辐射源