检索结果-南通市图书馆

牙形刺Idiognathodus simulator演化谱系研究进展及意义

在线全文

学校读者我要写书评

暂无评论

微体古生物学报 2019年第4期36卷 370-376页

作者：祁玉平 james E BARRICK Nicholas j HOGANCAMP 胡科毅王秋来现代古生物学和地层学国家重点实验室中国科学院南京地质古生物研究所南京210008 德州理工大学地球科学系美国德克萨斯州拉伯克市794133 赫斯公司美国德克萨斯州休斯敦市770104 休斯敦大学地球与大气科学系美国德克萨斯州休斯敦市770105 南京大学生物演化与环境科教中心南京210023 中国科学院生物演化与环境卓越创新中心南京210008

尽管牙形刺Idiognathodus simulator已于2007年被国际界线工作组和国际地层委员会石炭纪地层分会正式选定为格舍尔阶的底界标志种,但其演化谱系,即其直接的祖先种并不清楚。近十多年来,各国学者对此展开了紧锣密鼓的研究,提出了多种可... 详细信息

尽管牙形刺Idiognathodus simulator已于2007年被国际界线工作组和国际地层委员会石炭纪地层分会正式选定为格舍尔阶的底界标志种,但其演化谱系,即其直接的祖先种并不清楚。近十多年来,各国学者对此展开了紧锣密鼓的研究,提出了多种可能性方案,但均因缺乏足够证据而一一被否。本文作者近两年来通过对华南剖面卡西莫夫阶和格舍尔阶界线层的牙形刺再研究,提出Idiognathodus abdivitus为***的直接祖先,该演化谱系在贵州罗甸纳庆和纳饶两剖面均得到有效验证。这一研究成果,必将迅速推动石炭系格舍尔阶全球层型(GSSP)的研究进程。

关键词：牙形刺演化谱系格舍尔阶全球层型华南

SSRI和他汀类药物可增加蛛网膜下腔出血后血管痉挛的风险

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） 2005年第9期1卷 47-48页

作者： Singhal A.B. Topcuoglu M.A. Dorer D.j. 周永 Stroke Service VBK-802 Massachusetts General Hospital Boston MA 02114 United States Dr.

Background: Use of medications with vasoconstrictive or vasodilatory effects can potentially affect the risk for vasospasm after aneurysmal subarachnoid hemorrhage (SAH). Methods: Using International Classification of Diseases-9 diagnostic codes followed by medical record review, the authors identified 514 patients with SAH admitted between 1995 and 2003 who were evaluated for vasospasm between days 4 and 14. The authors determined risks for vasospasm, symptomatic vasospas m, and poor clinical outcomes in patients with documented pre-hemorrhagic use o f calcium channel blockers, beta-receptor blockers, ACE inhibitors, aspirin, se lective serotonin reuptake inhibitors (SSRIs), non-SSRI vasoactive antidepressa nts, or statins. Results: Vasospasm developed in 62%, and symptomatic vasospasm in 29%of the cohort. On univariate analysis, the risk for all vasospasm tended to increase in patients taking SSRIs (p=0.09) and statins (p=0.05); SSRI use in creased the risk for symptomatic vasospasm (p=0.028). The Cochran-Armitage tren d test showed that the proportion of patients taking SSRIs and statins increased significantly across three wors ening categories (none, asymptomatic, symptomatic) of vasospasm. Logistic regres sion analysis showed that SSRI use tended to predict all vasospasm (O.R. 2.01 [0 .91 to 4.45]), and predicted symptomatic vasospasm (O.R. 1.42 [1.06 to 4.33]) . Statin exposure increased the risk for vasospasm (O.R. 2.75 [1.16 to 6.50]), perh aps from abrupt statin withdrawal (O.R. 2.54 [0.78 to 8.28]). Age hess grade 4 or 5, and Fisher Group 3 independently predicted all vasospasm, symptomatic vasospasm, poor discharge clinical status, and death. Conclusion: Selective serotonin reuptake inhibitor and statin users have a higher risk for su barachnoid hemorrhagerelated vasospasm. Whether the underlying disease indicatio n, direct actions, or rebound effects from abrupt drug withdrawal account for th e associated risk warrants further investiga

关键词：蛛网膜下腔出血血管痉挛他汀类药物 SSRI 钙通道阻滞剂血管收缩抗抑郁药 β受体阻滞剂国际疾病分类天对

远程卒中的医疗质量和患者结局美国心脏协会／美国卒中协会对医疗卫生专业人员发布的科学声明

在线全文

学校读者我要写书评

暂无评论

国际脑血管病杂志 2017年第4期25卷 289-309页

作者：李海峰高翔丁晓君姜平赵冰山东大学齐鲁医院神经内科济南250012 青岛大学附属医院 266071

目的远程卒中是最常用和发展最迅速的远程医疗应用之一，为医院和患者提供急需的卒中专业知识。本文回顾了远程卒中的现状并提出了持续质量和患者结局监测的措施，以提高其效能并促进其实施。方法通过文献检索复习远程卒中的现状和相关... 详细信息

目的远程卒中是最常用和发展最迅速的远程医疗应用之一，为医院和患者提供急需的卒中专业知识。本文回顾了远程卒中的现状并提出了持续质量和患者结局监测的措施，以提高其效能并促进其实施。方法通过文献检索复习远程卒中的现状和相关的质量指标。编写委员会成员致力于回顾特定的质量和患者结局指标，并提出了远程卒中网络评价指标的具体建议。初稿分发给所有委员会成员进行修订，对提出的建议进行讨论以达成共识。结果回顾了远程卒中的模式及其在卒中诊疗系统中的作用。简要介绍质量监测的科学性以及质量指标的以往经验。复习了过程指标、患者结局、组织型纤溶酶原激活剂的使用、患者和提供者的满意度以及远程卒中技术，并提供了有关质量评价指标的建议。其他内容还包括执照、认证、培训和归档。

关键词： AHA科学声明质量指标医疗保健卒中远程医疗治疗结果

Common workflows for computing material properties using different quantum engines

在线全文

学校读者我要写书评

暂无评论

npj Computational Materials 2021年第1期7卷 1202-1213页

作者： Sebastiaan P.Huber Emanuele Bosoni Marnik Bercx jens Bröder Augustin Degomme Vladimir Dikan Kristjan Eimre Espen Flage-Larsen Alberto Garcia Luigi Genovese Dominik Gresch Conrad johnston Guido Petretto Samuel Poncé Gian-Marco Rignanese Christopher j.Sewell Berend Smit Vasily Tseplyaev Martin Uhrin Daniel Wortmann Aliaksandr V.Yakutovich Austin Zadoks Pezhman Zarabadi-Poor Bonan Zhu Nicola Marzari Giovanni Pizzi Theory and Simulation of Materials(THEOS)and National Centre for Computational Design and Discovery of Novel Materials(MARVEL) École Polytechnique Fédérale de LausanneLausanneSwitzerland Institut de Ciència de Materials de Barcelona ICMAB-CSICBellaterraSpain Peter Grünberg Institut and Institute for Advanced Simulation Forschungszentrum JülichJülichGermany Department of Physics RWTH Aachen UniversityAachenGermany CEA IRIG-MEM-L_SimUniv.Grenoble-AlpesGrenobleFrance Nanotech@surfaces Laboratory Swiss Federal Laboratories for Materials Science and Technology(Empa)DübendorfSwitzerland SINTEF Industry Materials PhysicsOsloNorway Department of Physics University of OsloOsloNorway Microsoft Station Q University of CaliforniaSanta BarbaraCAUSA Atomistic Simulation Centre School of Mathematics and PhysicsQueen’s University BelfastBelfastUK UCLouvain Institut de la Matière Condensée et des Nanosciences(IMCN)Louvain-la-NeuveBelgium Laboratory of Molecular Simulation(LSMO) Institut des sciences et ingénierie chimiques(ISIC)École Polytechnique Fédérale de Lausanne(EPFL)ValaisSionSwitzerland Department of Chemistry Claverton DownUniversity of BathBathUK The Faraday Institution DidcotUK Department of Chemistry University College LondonLondonUK

The prediction of material properties based on density-functional theory has become routinely common,thanks,in part,to the steady increase in the number and robustness of available simulation *** plurality of codes and methods is both a boon and a *** providing great opportunities for cross-verification,these packages adopt different methods,algorithms,and paradigms,making it challenging to choose,master,and efficiently use *** demonstrate how developing common interfaces for workflows that automatically compute material properties greatly simplifies interoperability and *** introduce design rules for reusable,code-agnostic,workflow interfaces to compute well-defined material properties,which we implement for eleven quantum engines and use to compute various material *** implementation encodes carefully selected simulation parameters and workflow logic,making the implementer’s expertise of the quantum engine directly available to *** workflows are made available as open-source and full reproducibility of the workflows is guaranteed through the use of the AiiDA infrastructure.

关键词： quantum routine material

对低级别蛛网膜下腔出血患者迟发性脑缺血进行连续EEG定量检测

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

世界核心医学期刊文摘（神经病学分册） 2005年第4期1卷 19-19页

作者： Claassen j. Hirsch L.j. Kreiter K.T 王英鹏

Delayed cerebral ischemia (DCI) due to vasospasm is often undetected by clinical exam in patients with poor- grade subarachnoid hemorrhage (SAH). The purpose of this study was to identify quantitative EEG(qEEG) parameters that are most sensitive and specific for the detection of DCI in stuporous or comatose SAH patients. Of 78 consecutive Hunt- hess grade 4 or 5 SAH patients admitted to our Neuro- ICU over a 2- year period, 48 were eligible for participation and 34 were enrolled. Continuous EEG monitoring was performed from post- operative day 2 to post- SAH day 14. In each patient, 20 artifact- free, 1min EEG- clips following an alerting stimulus were analyzed: 10 clips were obtained on monitoring day 1 (baseline), and 10 on days 4- 6 (follow- up). In DCI patients, follow- up clips were obtained after the onset of deterioration and before infarction had occurred. Twelve qEEG parameters were calculated using fast Fourier transformation; generalized estimating equations were used to compare ratios of change in qEEG parameters in patients with and without DCI. Nine of 34 patients (26% ) developed DCI. The alpha/delta ratio (alpha power/delta power; ADR) demonstrated the strongest association with DCI. The median decrease of ADR for patients with DCI was 24% , compared to an increase of 3% for patients without DCI (Z=4.0, P 10% decrease in ADR from baseline (sensitivity 100% , specificity 76% ) and any single measurement with a >50% decrease (sensitivity 89% , specificity 84% ). A decrease in the ADR may be a sensitive method of detecting DCI, with reasonable specificity. This post- stimulation qEEG parameter may supplement the clinical exam in poor- grade SAH patients and may prove useful for the detection of DCI. Following ADRs may allow earlier detection of DCI and initiation of interventions at a reversible stage, thus preventing infarction and neurological morbidity.

关键词：蛛网膜下腔出血 EEG 脑缺血血管痉挛神经系统疾病信号刺激特异指标辅助指标 delta 特异性

在线全文

学校读者我要写书评

暂无评论

地质力学分析新方法

国外测井技术 2009年第1期24卷 58-71页

作者： johnCook ReneA．Frederiksen KlausHasbo Sidney Green Arnis judzis j.Wesley Martin Roberto Suarez-Rivera jorg Herwanger Patrick Hooyman Don Lee Sheila Noeth Colin Sayers Nick Koutsabeloulis Robert Marsden Morten G.Stage Chee Phuat Tan 英国剑桥 hess丹麦公司丹麦哥本哈根美国犹他州盐湖城美国得克萨斯州休斯敦英国Bracknell DONG能源公司丹麦Hqrsholm 马来西亚吉隆坡

应力与压力对任何油藏、井筒及完井装置都会产生影响。钻井、开采及注入过程都会使应力和压力发生变化,有时会给作业者带来不利影响。随着地质力学测量、模拟和监测技术的不断发展,在油气田从评价到废弃的整个生命期内,勘探与生产公司... 详细信息

应力与压力对任何油藏、井筒及完井装置都会产生影响。钻井、开采及注入过程都会使应力和压力发生变化,有时会给作业者带来不利影响。随着地质力学测量、模拟和监测技术的不断发展,在油气田从评价到废弃的整个生命期内,勘探与生产公司都能够预测应力及压力的变化情况,并降低这些变化所造成的不利影响。

关键词：地质力学分析应力和完井装置发生变化力学测量监测技术压力作业者