检索结果-南通市图书馆

Enabling rapid X-ray CT characterisation for additive manufacturing using CAD models and deep learning-based reconstruction

引用

npj Computational Materials 2023年第1期9卷 1443-1452页

作者： Amirkoushyar Ziabari S.V.Venkatakrishnan Zackary Snow Aleksander Lisovich Michael Sprayberry Paul Brackman Curtis Frederick Pradeep Bhattad Sarah Graham philip bingham Ryan Dehoff Alex Plotkowski Vincent Paquit Energy and Electrification Infrastructure Division Oak Ridge National LaboratoryKnoxvilleTN 37830USA ZEISS Industrial Metrology LLC Maple GroveMN 55369USA Manufacturing Science Division Oak Ridge National LaboratoryOak RidgeTNUSA Materials Science and Technology Division Oak Ridge National LaboratoryOak RidgeTNUSA

Metal additive manufacturing(AM)offers flexibility and cost-effectiveness for printing complex parts but is limited to few *** new alloys requires process parameter optimisation to produce consistent,high-quality ***-resolution X-ray computed tomography(XCT)has not been effective for this task due to artifacts,slow scan speed,and *** propose a deep learning-based approach for rapid XCT acquisition and reconstruction of metal AM parts,leveraging computer-aided design models and physics-based simulations of nonlinear interactions between X-ray radiation and *** significantly reduces beam hardening and common XCT *** demonstrate high-throughput characterisation of over a hundred AlCe alloy components,quantifying improvements in characterisation time and quality compared to high-resolution microscopy and *** approach facilitates investigating the impact of process parameters and their geometry dependence in metal AM.

关键词： rapid alloy character

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

Spontaneous Imbibition of Water and Determination of Effective Contact Angles in the Eagle Ford Shale Formation Using Neutron Imaging

引用

Journal of Earth Science 2017年第5期28卷 874-887页

作者： Victoria H.DiStefano Michael C.Cheshire Joanna McFarlane Lindsay M.Kolbus Richard E.Hale Edmund Perfect Hassina Z.Bilheux Louis J.Santodonato Daniel S.Hussey David L.Jacobson Jacob M.LaManna philip R.bingham Vitaliy Starchenko Lawrence M.Anovitz Physical Sciences Directorate Chemical Sciences Division Oak Ridge National Laboratory Bredesen Center University of Tennessee Energy & Environmental Sciences Directorate Energy & Transportation Sciences Division Oak Ridge National Laboratory Neutron Sciences Directorate Chemical and Engineering Materials Division Oak Ridge National Laboratory Nuclear Science & Engineering Directorate Reactor & Nuclear Systems Division Oak Ridge National Laboratory Department of Earth and Planetary Science University of Tennessee Neutron Sciences Directorate Instrument and Source Division Oak Ridge National Laboratory Physical Measurement Laboratory National Institute of Standards and Technology Energy & Environmental Sciences Directorate Electrical & Electronics Systems Research DivisionOak Ridge National Laboratory

Understanding of fundamental processes and prediction of optimal parameters during the horizontal drilling and hydraulic fracturing process results in economically effective improvement of oil and natural gas extraction. Although modern analytical and computational models can capture fracture growth, there is a lack of experimental data on spontaneous imbibition and wettability in oil and gas reservoirs for the validation of further model development. In this work, we used neutron im- aging to measure the spontaneous imbibition of water into fractures of Eagle Ford shale with known geometries and fracture orientations. An analytical solution for a set of nonlinear second-order diffe- rential equations was applied to the measured imbibition data to determine effective contact angles. The analytical solution fit the measured imbibition data reasonably well and determined effective con- tact angles that were slightly higher than static contact angles due to effects of in-situ changes in veloci- ty, surface roughness, and heterogeneity of mineral surfaces on the fracture surface. Additionally, small fracture widths may have retarded imbibition and affected model fits, which suggests that aver- age fracture widths are not satisfactory for modeling imbibition in natural systems.

关键词： spontaneous imbibition effective contact angle neutron imaging Eagle Ford shale rock fractures.

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

2010年类风湿关节炎分类标准——美国风湿病学会和欧洲抗风湿病联盟的联合倡议

2010年类风湿关节炎分类标准——美国风湿病学会和欧洲抗风湿病联...

引用

贵州省医学会风湿病学分会第四届学术年会

作者： Daniel Aletaha Tuhina Neogi Alan J Silman Julia Funovits David T Felson Clifton O bingham Ⅲ Neal S Birnbaum Gerd R Burmester Vivian P Bykerk Marc D Cohen Bernard Combe Karen H Costenbader Maxime Dougados Paul Emery Gianfranco Ferraccioli Johanna MW Hazes Kathryn Hobbs Tom WJ Huizinga Arthur Kavanaugh Jonathan Kay Tore K Kvien Timothy Laing philip Mease Henri A Menard Larry W Moreland Raymond L Naden Theodore Pincus Josef S Smolen Ewa Stanislawska-Biernat Deborah Symmons Paul P Tak Katherine S Upchurch Jiri Vencovsky Frederick Wolfe Gillian Hawker 季兰岚邓雪蓉赵明田真张卓莉 Medical University of Vienna ViennaAustria Boston University School of Medicine BostonMassachusettsUSA

目的 :在早期类风湿关节炎(rheumatoid arthritis,RA)的诊断中,1987年美国风湿病学会(AmericanCollege of Rheumatology,ACR;旧称AmericanRheumatism Association,ARA)的诊断标准因为缺乏敏感度而受到质疑。本研究的目的是建立新的RA分类标准。方法 :由ACR和欧洲抗风湿病联盟(EuropeanLeague Against Rheumatism,EULAR)共同组成的工作小组,分三个阶段建立RA新的分类标准。研究的目标人群是初发的未分化关节炎患者,主要研究目的是寻找能够预测这些病人发展为RA的危险因素,并将RA疾病特点定义为持续性和/或侵蚀性关节炎。结果 :在新的分类标准中,确诊RA至少需要一个关节有明确的滑膜炎表现,除外其他可能导致滑膜炎症的疾病,同时以下四项评分的总分≥6分(最高10分):受累关节的数量和部位(0-5分)、血清学自身抗体异常(0-3分)、急性期反应物升高(0-1分)和症状持续时间(共分两级;0-1分)。结论 :既往诊断RA比较依赖骨破坏这一RA晚期表现,而新的分类标准着重于疾病早期表现而不是晚期特点,将疾病特点重新定义为持续性和/或侵蚀性滑膜炎。这一新标准的推出将再次强调了RA早期诊断的必要性以及早期有效治疗对于预防或减少不良后遗症的发生具有重要意义。

关键词：

来源： cnki会议评论

在线全文

cnki会议

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

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

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：