检索结果-南通市图书馆

气象学报 1958年第4期 239-248页

作者：徐尔灏南京大学气象学系

作为一个典型,作者详细分析了1955年2月中旬一次大寒潮过程中,东亚上空的涡度场.涡度用graham法,由测风记录计算的;由地面到5500m,共分9个层次.发现地面高压中心上空并非单纯的负号涡度区;1000m以下,有小的涡度中心,可正可负,但强度都不... 详细信息

作为一个典型,作者详细分析了1955年2月中旬一次大寒潮过程中,东亚上空的涡度场.涡度用graham法,由测风记录计算的;由地面到5500m,共分9个层次.发现地面高压中心上空并非单纯的负号涡度区;1000m以下,有小的涡度中心,可正可负,但强度都不大;1000—5500m,地面高压中心前方一般为正号涡度区,后方为负号涡度区;高压中心加强,反映为负号涡度区的逐渐扩充.又考察了涡度方程中各项的概量大小,平流输送项及散度项的概量均为10′×1010sec-2,但后者绝对值要大一些.这几天高空槽脊线的移动与发展往往与涡度平流项的分布情况不符,而可以由散度项的分布得到解释.无论是5500m面或3000m面都不能当作近似于无辐散面.铅直输送项及差异铅直速度项的概量为10°×1010sec-2,肯定是次要的项.Sherman过于强调差异铅直作用项,是不正确的.

关键词：涡度散度概量摘要

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

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

引用

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 *** 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 *** 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 *** 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

来源：

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

炎性及脱髓鞘性视神经炎的多焦视觉诱发电位分析

引用

世界核心医学期刊文摘（眼科学分册） 2006年第6期2卷 55-55页

作者： Fraser C.L. Klistorner A. graham S.L. 王文军 Department of electrophysiology Save Sight Institute8 Macquarie StreetSydneyNSW 2001Australia

Objective: To determine the sensitivity of multifocal visual evoked potentials (mVeP) in optic neuritis of an inflammatory or demyelinating nature. Design: Cross-sectional study. Participants: Sixty-four patients participated who had a confirmed diagnosis of optic neuritis (ON) (past and acute). Based on the McDonald multiple sclerosis (MS) criteria,25 patients (27 eyes with ON) were deemed to have isolated optic neuritis and thus not have MS (i.e.,the not-MS group),and 19 patients (24 eyes with ON) had a diagnosis of MS (i.e.,the MS group). The remaining 20 patients (25 eyes with ON) were at a high risk of MS,but diagnostic evaluation was equivocal,and thus were classified as the possible MS group. A control group of 20 normal patients was enrolled. Testing: The mVeP test was performed using the Accumap. All ON patients had recent magnetic resonance imaging scans of the brain and spinal cord. Main Outcome Measures: Multifocal visual evoked potentials amplitude and latency values were analyzed within each group and were compared with the normal controls. Results: No abnormality was recorded on mVeP in the control group. Of all the ON eyes,74 (97.3% ) were abnormal on mVeP testing. Amplitude values were abnormal in 92.6% of not-MS eyes,92.0% of possible MS eyes,and 100% of those with MS,and latency was abnormal in 33.3% ,76.0% ,and 100% ,respectively. There was a significant difference in the mVeP latency z-scores among all ON groups (P est). Although distribution graphs of latency z-scores in the not-MS and MS groups had single peaks and were clearly separate from each other,the latency z-score distribution within the possible MS group in postacute patients was bimodal,with each peak corresponding to the distribution of the not-MS and MS group,respectively. The mVeP latency z-scores had a sensitivity and specificity of 100% in detecting patients with ON due to MS when compared with normal patients. Conclusions: ThemVeP test is a sensitive and

关键词：多焦视觉诱发电位急性视神经炎脱髓鞘性 Kruskal-Wallis检验电位分析炎性磁共振成像检查异常发生率诊断敏感性正常对照组

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

APOe e4与外伤性脑损伤脑血管病理的相关性

引用

世界核心医学期刊文摘(神经病学分册) 2006年第8期 60-60页

作者： Smith C. graham D.I. Murray L.S 樊慧婷 Department of Pathology University ofEdinburgh Western General Hospital Edinburgh EH4 2XU United Kingdom Dr.

Background: Previous studies have found the e4 allele of the apolipoprotein e gene (APOe e4) is associated with an unfavourable outcome after head injury, but this has not been related to specific pathological features. Objectives: This study tested the postulate that head injured patients with APOe e4, amounting to approximately a third of the population, are selectively predisposed to one or more of the different pathological features that constitute the response to traumatic brain injury (TBI), and that this underlies the association of APOe e4 with poor clinical outcome. Methods: Included in the study were 239 fatal cases of TBI (1987- 1999) for which APOe genotypes were determined from archival tissue. For each case, specific pathological features of trauma were recorded by researchers blinded to the APOe e4 status. Of the 239 cases examined, 83 (35% ) were APOe e4 carriers and 156 (65% ) were noncarriers. Results: Possession of APOe e4 was associated with a greater incidence of moderate or severe contusions (42% v 30% for carriers versus e4 non- carriers; p = 0.05) and there was a trend towards a greater incidence of severe ischaemic brain damage (54% v 42% ; p = 0.08). Significant differences were not noted between the other pathological features examined. Conclusions: Possession of APOe e4 is associated with a greater incidence of moderate/severe contusional injury and severe ischaemic brain damage in fatal cases of TBI. This may be relevant to the relatively poor outcome from traumatic brain injury in patients with APOe e4 identified in clinical studies.

关键词：重度脑损伤 APOe e4 携带者脑外伤缺血性病理特征

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：