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8684篇 您的检索式:作者名="Johansson"
    题名 作者 年代 出处 被引量
1金融抑制与经济结构转型显示文摘结构转型是当前世界经济面临的主要问题之一。本文在经济结构转型的模型中,研究了金融抑制对产业结构变化的影响。模型表明经济资源会随着经济增长从工业部门不断流入服务业部门,从而使得服务业的比重不断上升。而政府可以采取金融抑制政策阻碍结构转型过程。通过抑制服务业,保护和促进工业部门的发展,从而造成服务业占比偏低,导致国内产业结构失衡。跨国面板数据的实证结果表明,金融抑制显著阻碍了结构转型。金融抑制程度越高,经济中服务业相对于制造业的比例会越低。基于不同收入水平的国家分组数据、不同的结构变量衡量以及不同的金融抑制指标的稳健性检验支持了这一结论。文章结果表明,在有政府干预和偏好工业部门发展的国家,金融抑制是结构失衡的重要因素。王勋 Anders Johansson 2013经济研究2013,48,1:140
2北欧湖泊的重金属调查:浓度、地理模式及与临界界限的关系显示文摘1995年秋天,北欧各国同时对本国的湖泊进行了调查,包括俄罗斯西北的科拉半岛。在大约3000个湖泊中,被调查的11种金属(铅、镉、砷、锌、铜、镍、钴、铁、锰、铬、钒)一般浓度较低,并具有明确的地理模式。对于铅、镉、锌和一定程度上钴的分布,远程迁移的空气污染带来的直接和间接影响是最重要的因素。湖中总有机碳(TOC)浓度对于铁和锰,并在一定程度上对于砷、铬和钒是重要的。对于铜和镍,基岩地质概况是最重要的控制因素,但在科拉半岛很多冶炼厂周围地区是个例外,在那里由于当地空气传播的污染,湖泊中铜和镍的浓度很高。基岩和地表的地质概况对于控制砷、钴、铬和钒的浓度也是重要的因素。调查结果表明在北欧国家湖泊中重金属污染在区域尺度上是一个较轻微的生态问题。Brit Lisa Skjelkvle Tom Andersen Eirik Fjeld Jaakko Mannio Anders Wilander Kjell Johansson Jens Peder Jensen Tatyana Moiseenko 孙学飞 2001AMBIO-人类环境杂志2001,30,1:11
3Rectal nitric oxide as biomarker in the treatment of inflammatory bowel disease: Responders versus nonresponders显示文摘瞄准:探索直肠的氮的氧化物(没有) 作为处理的简历标记,在 ulcerative (UC ) 和 Crohn 的反应是疾病(CD ) ,并且检验在之间的关系直肠没有,没有 synthases (NOS ) 的粘膜表示,和支持 inflammatory cytokines。方法:有 UC 的 22 个病人并且 24 在类固醇治疗期间与 CD 被监视。直肠没有层次被测量,临床的活动在天被估计 1, 3, 7 和 28。NOS 和支持 inflammatory cytokines 的粘膜存在被免疫组织化学和 RT-PCR 分析。结果:显著地显示的活跃 UC 和 CD 增加了直肠没有层次(10950 +/- 1280 每十亿分开的 7610 和 5040 +/-(ppb ) ,分别地) 作为与控制相比(154 +/- 71 ppb, P < 0.001 ) 。直肠不在 UC 和 CD 与疾病活动微弱地相关(r = 0.34 为 UC 和 r = 0.48 为 CD, P < 0.01 ) 。在 12 个病人,一堂类固醇倔强的功课导致了结肠切除术。仅仅稍微有的这些病人没增加层次(UC:620 +/- 270 ppb;CD:1260 +/- 550 ppb ) 与那些相比与治疗学的回答(UC:18860 +/- 530 ppb, P < 0.001;CD:10060 +/- 3200 ppb, P < 0.05 ) 。结论:直肠没有水平是在是的 IBD 的治疗反应的一个有用简历标记低没有层次预言差的临床的回答到类固醇治疗。Tryggve Ljung Sofie Lundberg Mark Varsanyi Catharina Johansson Peter T Schmidt Max Herulf Jon O Lundberg Per M Hellstr(o|¨)m 2006World Journal of Gastroenterology2006,12,21:10
4华南长江和西江流域鲤科宽鳍鱲和马口鱼不同线粒体DNA谱系之间的体形分化(英文)显示文摘本文研究了两种鲤科鱼类,即分布于华南长江与西江的宽鳍鱲和马口鱼的不同线粒体DNA谱系之间的体形差异。近期基于线粒体DNA的这两个物种的系统发育分析认为这两个类元内包含多个谱系(宽鳍鱲A-D和马口鱼1-5)。本文采用几何形态度量学的方法研究了这些不同线粒体DNA谱系间是否存在体形方面的差异。在宽鳍鱲的4个不同的线粒体DNA谱系中,有3个被纳入本研究内容。结果显示:在宽鳍鱲的3个线粒体DNA谱系中,2个具有体形的差异。在马口鱼的5个线粒体DNA谱系中,3个被纳入本文的研究。结果显示所有3个谱系均存在体形差异。因此,线粒体DNA的谱系差异很大程度上表现在谱系间的体形差异方面,表明线粒体DNA谱系可能对应于不同的物种。Frank JOHANSSON 2006动物学报2006,52,5:8
5An overview of cryptographic primitives for possible use in 5G and beyond显示文摘This survey overviews the potential use of cryptographic primitives in the fifth-generation mobile communications system(aka 5G)and beyond.It discusses the new security challenges that come with 5G and presents the upcoming security architecture.It shows the use of current cryptographic algorithms and discusses new algorithms or modifications of existing ones,that can be relevant.It also discusses the need for lightweight algorithms to meet the new use cases as well as the general demand for algorithms secure even when large quantum computers are available.Jing YANG Thomas JOHANSSON 2020Science China(Information Sciences)2020,63,12:7
6Iatrogenic esophago-tracheal fistula:Challenges in diagnosis and management显示文摘Esophageo-tracheal fistula is a rare condition,and in most cases such fistulas are caused by malignant disease or emergency endotracheal intubation.A case where a wrapped tablet produced a fistula between the esophagus and trachea is described.The patient is a male born in 1938 who swallowed a tablet without unwrapping it.The patient was treated with selfexpanding metal stents(SEMS),but closure of the fistula was not achieved.Different examinations and treatment options are discussed.Surgical treatment for this condition has demonstrated considerable mortality and morbidity.In some cases closure of the fistula can be achieved by use of SEMS.Although we advise treatment of such cases with SEMS,in some cases treatment with stents will prove troublesome and the risk/benefit analysis will have to be reevaluated.istein Hovde yvind Haugen Lie Per Arthur Johansson ystein Stubhaug Egil Johnson Bjrn Hofstad Truls Hauge 2013World Journal of Gastroenterology2013,19,4:5
7列车车轮不圆的评定显示文摘对几种车轮的不圆度进行了测试,并对测试结果进行了比较分析,得出了一些结论。Anders Johansson 李刚(译) 2011国外铁道车辆2011,48,3:5
8Effects of spatial variation in cohesion over the concrete-rock interface on dam sliding stability显示文摘The limit equilibrium method(LEM) is widely used for sliding stability evaluation of concrete gravity dams.Failure is then commonly assumed to occur along the entire sliding surface simultaneously.However,the brittle behaviour of bonded concrete-rock contacts,in combination with the varying stress over the interface,implies that the failure of bonded dam-foundation interfaces occurs progressively.In addition,the spatial variation in cohesion may introduce weak spots where failure can be initiated.Nonetheless,the combined effect of brittle failure and spatial variation in cohesion on the overall shear strength of the interface has not been studied previously.In this paper,numerical analyses are used to investigate the effect of brittle failure in combination with spatial variation in cohesion that is taken into account by random fields with different correlation lengths.The study concludes that a possible existence of weak spots along the interface has to be considered since it significantly reduces the overall shear strength of the interface,and implications for doing so are discussed.Alexandra Krounis Fredrik Johansson Stefan Larsson 2015Journal of Rock Mechanics and Geotechnical Engineering2015,7,6:4
9Generalized potential of adult neural stem cells显示文摘Clarke DL Johansson CB Wilbertz J 0,,:4
10Immune checkpoint therapy for pancreatic cancer显示文摘Novel treatment modalities are necessary for pancreatic cancer. Immunotherapy with immune checkpoint inhibition has shown effect in other solid tumors, and could have a place in pancreatic cancer treatment. Most available clinical studies on immune checkpoint inhibitors for pancreatic cancer are not yet completed and are still recruiting patients. Among the completed trials, there have been findings of a preliminary nature such as delayed disease progression and enhanced overall survival after treatment with immune checkpoint inhibitors in mono- or combination therapy. However, due to small sample sizes, major results are not yet identifiable. The present article provides a clinical overview of immune checkpoint inhibition in pancreatic cancer. Pub Med, Clinical Trials.gov and American Society of Clinical Oncology's meeting abstracts were systematically searched for relevant clinical studies. Four articles, five abstracts and 25 clinical trials were identified and analyzed in detail.Henrik Johansson Roland Andersson Monika Bauden Sarah Hammes Stefan Holdenrieder Daniel Ansari 2016World Journal of Gastroenterology2016,22,43:4
11Differences in outcomes of oesophageal and gastric cancer surgery across Europe显示文摘J. L. Dikken J. W. van Sandick W. H. Allum J. Johansson L. S. Jensen H. Putter V. H. Coupland M. W. J. M. Wouters V. E. P. Lemmens C. J. H. van de Velde 2012Br J Surg2012,,1:4
12Outcomes of Medicare beneficiaries hospitalised with transient ischaemic attack and stratification using the ABCD^(2) score显示文摘Background Long-term outcomes for Medicare beneficiaries hospitalised with transient ischaemic attack(TIA)and role of ABCD^(2) score in identifying high-risk individuals are not studied.Methods We identified 40825 Medicare beneficiaries hospitalised from 2011 to 2014 for a TIA to a Get With The Guidelines(GWTG)-Stroke hospital and classified them using ABCD^(2)s of mortality and rehospitalisation(all-cause,ischaemic stroke,haemorrhagic stroke,myocardial infarction,and gastrointestinal and intracranial haemorrhage)for high-risk versus low-risk groups adjusted for patient and hospital characteristics.Results Of the 40825 patients,35118(86%)were high risk(ABCD^(2)≥4)and 5707(14%)were low risk(ABCD^(2)=0-3).Overall rate of mortality during 1-year follow-up after hospital discharge for the index TIA was 11.7%,44.3% were rehospitalised for any reason and 3.6%were readmitted due to stroke.Patients with ABCD^(2) score≥4 had higher mortality at 1 year than not(adjusted HR 1.18,95%CI 1.07 to 1.30).Adjusted risks for ischaemic stroke,all-cause readmission and mortality/all-cause readmission at 1 year were also significantly higher for patients with ABCD^(2) score≥4 vs 0-3.In contrast,haemorrhagic stroke,myocardial infarction,gastrointestinal bleeding and intracranial haemorrhage risk were not significantly different by ABCD^(2) score.Conclusions This study validates the use of ABCD^(2) score for long-term risk assessment after TIA in patients aged 65 years and older.Attentive efforts for community-based follow-up care after TIA are needed for ongoing prevention in Medicare beneficiaries who were hospitalised for TIA.Shreyansh Shah Li Liang Durgesh Bhandary Saga Johansson Eric E Smith Deepak L Bhatt Gregg C Fonarow Naeem D Khan Eric Peterson Janet Prvu Bettger 2021Stroke & Vascular Neurology2021,6,2:3
13HMG:心脏病发作的记忆储存在我们的基因中显示文摘遗传因素和环境因素影响我们的心血管疾病风险。如今。在一项新的研究中,来自瑞典乌普萨拉大学的研究人员发现心脏病发作的记忆能够通过表观遗传变化储存在我们的基因中。相关研究结果在线发表在Human Molecular Genetics期刊上。Mathias Rask-Andersen David Martinsson Muhammad Ahsan Stefan Enroth Weronica E. Ek Ulf Gyllensten sa Johansson 2016现代生物医学进展2016,16,31:3
14Comprehensive functional annotation of susceptibility variants identifies genetic heterogeneity between lung adenocarcinoma and squamous cell carcinoma显示文摘Although genome-wide association studies have identified more than eighty genetic variants associated with non-small cell lung cancer(NSCLC)risk,biological mechanisms of these variants remain largely unknown.By integrating a large-scale genotype data of 15581 lung adenocarcinoma(AD)cases,8350 squamous cell carcinoma(SqCC)cases,and 27355 controls,as well as multiple transcriptome and epigenomic databases,we conducted histology-specific meta-analyses and functional annotations of both reported and novel susceptibility variants.We identified 3064 credible risk variants for NSCLC,which were overrepresented in enhancer-like and promoter-like histone modification peaks as well as DNase I hypersensitive sites.Transcription factor enrichment analysis revealed that USF1 was AD-specific while CREB1 was SqCC-specific.Functional annotation and genebased analysis implicated 894 target genes,including 274 specifics for AD and 123 for SqCC,which were overrepresented in somatic driver genes(ER=1.95,P=0.005).Pathway enrichment analysis and Gene-Set Enrichment Analysis revealed that AD genes were primarily involved in immune-related pathways,while SqCC genes were homologous recombination deficiency related.Our results illustrate the molecular basis of both wellstudied and new susceptibility loci of NSCLC,providing not only novel insights into the genetic heterogeneity between AD and SqCC but also a set of plausible gene targets for post-GWAS functional experiments.Na Qin Yuancheng Li Cheng Wang Meng Zhu Juncheng Dai Tongtong Hong Demetrius Albanes Stephen Lam Adonina Tardon Chu Chen Gary Goodman Stig EBojesen Maria Teresa Landi Mattias Johansson Angela Risch H-Erich Wichmann Heike Bickeboller Gadi Rennert Susanne Arnold Paul Brennan John KField Sanjay Shete Loic Le Marchand Olle Melander Hans Brunnstrom Geoffrey Liu Rayjean JHung Angeline Andrew Lambertus AKiemeney Shan Zienolddiny Kjell Grankvist Mikael Johansson Neil Caporaso Penella Woll Philip Lazarus Matthew BSchabath Melinda CAldrich Victoria LStevens Guangfu Jin David CChristiani Zhibin Hu Christopher IAmos Hongxia Ma Hongbing Shen 2021Frontiers of Medicine2021,15,2:3
15心房颤动——当今面临的挑战显示文摘在过去数年里,临床和科撞方面对心房颤动(房颤)的关注明显增加,有关这一论题的出版物数量迅速、稳定的增长就是证明。虽然已有一些新方法治疗遮一心律失常一但大多数房颤患者仍然不得不忍受这一心律失常,包括其不良后果和症状,房颤无疑是虽迫切需要有更好治疗方法的一种心律失常。为了达到这一目的,就需要更深刻地认识房颤的机制.以便开发直接影响这一基础病理生理机制的治疗措施。Olsson SB Hansson A Hedin E Holm M Ingemansson M Johansson R Meurling C Pehrson S Roijer A Yuan S 方丕华 1997中华心律失常学杂志1997,1,1:3
16增压天然气发动机的燃烧室显示文摘本研究是早期工作的延续。早期工作主要研究了客车用柴油机改为天然气发动机时,不同形状的燃烧室设计对紊流、燃烧、排放和效率的影响。本研究将一台Volvo TD102型发动机λ=1.6~1.9范围内能增压到平均有效压力高达16bar。对比了6种不同的燃烧室。结果表明,具有相同压缩比12的6种不同燃烧室的燃烧性能差别很大。高放热率适于稀气燃烧,同时,燃烧室的设计对防止敲缸和失火现象的发生也有很大作用。Eimewall P Johansson B 张淼 1998国外内燃机1998,30,4:3
17饲喂青贮饲料对猪肉脂肪含量与脂肪酸组成的影响显示文摘本研究结果表明 ,饲喂青贮料 (红三叶青贮 )的生猪腰肉与常规饲养的生猪腰肉相比 ,肌内脂肪 (IMF)、饱和脂肪酸 (SAFA)和单不饱和脂肪酸 (MUFA)含量较低 ,多不饱和脂肪酸 (PUFA,ω6,ω3 )较高。但制熟后 ,ω3 -PUFA相对含量较高 ,ω6/ω3较小。 IMF和烹调都影响猪肉脂肪酸 (FA)浓度。饲喂青贮料的生猪腰肉与常规饲养的生猪腰肉相比 ,SAFA、MUFA和 PUFA浓度有差异烹熟后 ,这些差异就消失了 ,但 ω6/ ω3较小这种差异仍存在 ,所以 ,饲喂青贮料的猪腰肉烹熟后肉品有所改善。L Johansson 李琍 2003中国畜牧兽医2003,30,1:3
18可靠性维修实施案例研究显示文摘以可靠性为中心的维修(RCM)从本质上讲是一个优化维修的方法,用于确定所有系统或资产的维修活动,使其获得最优的性能。RCM广泛应用于各工业部门,自从它诞生以来就被认为是一种有效的维修方法。然而,在企业中实施RCM时还存在若干问题需要解决。对大型水电公司实施RCM时出现的或潜在的一些问题研究发现,RCM的成功实施依赖以下因素所有相关员工的认识、高层管理的支持和企业内部有效的沟通系统。Aditya Parida Daniel Johansson Martin Edelman 梁工谦 邱若娟 2005设备管理与维修2005,,11:3
19改良的硫酸盐连续制浆法显示文摘目前,来自纸浆漂白车间废液对环境造成相当大的污染。如果在蒸煮或氧脱木素阶段尽可能的去除木素,漂白车间排放的废液中溶解物量会减少,污染将得到改善;同时,在碱回收炉中燃烧的溶解物质量将增加,导致回收热能增加。蒸煮阶段大量脱除木素也会降低漂白化学药剂的消耗。这也意味着降低环境污染、间接减少电力消耗并将减少很多费用。Johansson,Johan Mjberg 于洪岩 1992国外造纸1992,11,2:3
20Biomass production of hybrid aspen growing on former farm land in Sweden显示文摘We construct dry weight equations for hybrid aspen growing on former farmland in Sweden. Dry weight equations for fractions of hybrid aspen trees were also made. We estimated biomass production in 24 stands. The stands were located in Sweden at latitudes ranging from 55 to 60o N. The mean age was 18 years (range 15-23), the mean stand density 1090 stems·ha-1 (range 378 2374), and the mean diameter at breast height (over bark) 178 mm (range 85 244 mm). Soil types in the hybrid aspen stands were mainly clay (21 stands), tills (2 stands) and other (1 stand). The mean total standing dry weight above stump level (≈ 200 mm) for the hybrid aspen stands was 135±53 t·ha-1 with a range of 42 219 t·ha-1 . In addition to estimating conventional dry weights of trees and tree components, basic density, specific leaf area (SLA), projected leaf area (PLA) and leaf area index (LAI) were estimated and were in agreement with published figures.Tord Johansson 2013Journal of Forestry Research2013,24,2:3
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