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

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j.urnal of Earth Science 2017年第5期28卷 874-887页

作者： Victoria H.DiStefano Michael C.Cheshire j.anna McFarlane Lindsay M.Kolbus Richard E.Hale Edmund Perfect Hassina Z.Bilheux Louis j.Santodonato Daniel S.hussey David L.j.cobson j.cob 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.

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Parallel personal measurements of diesel engine exhaust and crystalline silica using dual sampling port

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International j.urnal of Mining Science and Technology 2020年第3期30卷 313-319页

作者： alan Fleck Caroline Couture Virginie Cabelguen Patrick Eddy Ryan Ross Thuot Guillaume Lachapelle Hugo Coulombe Maximilien Debia Department of Environmental and Occupational Health University of MontrealMontreal H3T 1A8Canada Health and Safety Agnico Eagle MinesToronto M5C 2Y7Canada Health and Safety Westwood Mine(IAMGOLD)Preissac J0Y 2E0Canada

Diesel engine exhaust(DEE) and crystalline silica exposures occur simultaneously in the mining industry,and occupational sampling campaigns can be time-and cost-consuming. The authors evaluated a dualport system for simultaneous sampling of DEE and crystalline silica in laboratory and field *** tests evaluated the operation of pumps during 8 h sampling and the intensity of the flow variation for various filter loading conditions and for different modes of operation. Field validation was performed in an underground mine. Pumps operated in constant flow or constant pressure *** in constant flow mode showed that when the flowrate increased on one side of the system, it decreased on the opposite side according to the loading intensity. Tests in constant pressure mode showed that flowrates systematically decreased when using loaded cassettes. However, the higher the backpressure setting, the lower the flow variation was. Flow variations during field tests were generally within the acceptable ±5% range. However, significant flow variations were identified in higher concentrations. A significant negative correlation was found between flowrate variation and total carbon concentration. While the maj.rity of tests support the use of the dual-port for evaluating concomitant exposures, results highlight the possibility of filter overloading as a cause of flowrate changes.

关键词： Crystalline silica Diesel engine exhaust Dual-port Mining Monitoring

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Bimetal nickel–cobalt phosphide directly grown on commercial graphite substrate by the one-step electrodeposition as efficient electrocatalytic electrode

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Progress in Natural Science:Materials International 2020年第4期30卷 461-468页

作者： alan Meng Haiqin Zhang Baihe Huangfu Wenli Tian Liying Sheng Zhenj.ang Li Shuqin Tan Qingdang Li Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science MOE College of Chemistry and Molecular Engineering Qingdao University of Science and Technology Library Qingdao University of Science and Technology Key Laboratory of Polymer Material Advanced Manufacturing Technology of Shandong Provincial College of Electromechanical Engineering College of Sino-German Science and Technology Qingdao University of Science and Technology

It is challenging to find a method to obtain a catalyst with low cost and efficient multifunctional ***, in order to obtain the electrode with high-performance water splitting and non-enzymatic glucose detection, the commercial graphite sheet(GS) with excellent durability and electroconductivity was used as substrate material, and the non-noble ternary component Ni–Co–P catalyst with hierarchical architecture was fabricated on GS via a co-electrodeposition. The catalyst only required low overpotentials of 44.6, 76.5 and 49 m V to drive the current density of 10 m A cmalongside with the smaller Tafel slopes of 39.2, 44.8 and 112 m V decfor hydrogen evolution reaction(HER) in 1.0 M KOH, 0.5 M HSOand 1.0 M PBS solution,respectively. For oxygen evolution reaction(OER), the catalyst demonstrated a low overpotential of 304 m V to achieve the current density of 20 m A cmwith excellent Tafel slope of 89.8 m V decin alkaline ***, the Ni–Co–P/GS electrode serving as non-enzymatic glucose sensor exhibited the superior electrocatalytic activity with an ultrahigh sensitivity of 7400 μA m Mcm, low detection limit of 0.425 μM(S/N = 3), and wide linear range(1–1200 μM).

关键词： Simple-step electrodeposition Multifunctional electrocatalyst Non-noble elements Non-enzymatic glucose detection Overall water splitting

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Fine-particle Mn and other metals linked to the introduction of MMT into gasoline in Sydney, Australia: Results of a natural experiment

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Chinese j.urnal Of Geochemistry 2006年第B08期25卷 62-63页

作者： Brian Gulson David Cohen j. Michael Davis Ed Stelcer D. Garton Olg Hawas alan Taylor Graduate School of the Environment Macquarie University Sydney Australia Austrahan Nuclear Sctence and Technology Organisation Menai NSW 2234 Australia US Environmental Protection Agency Research Triangle Park NC 27709 Dept. of Psychology Macquarie University Sydney NSW 2109

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GRE 24小时自我飞跃 [影印版]

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丛书名：英语沙龙留美考试辅导丛书

2000年

作者： Mark alan Stewart,Frederick j.OToole

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Diagnostic and therapeutic challenges of gastrointestinal angiodysplasias: A critical review and view points

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World j.urnal of Gastroenterology 2019年第21期25卷 2549-2564页

作者： Diego García-Compeán ángel N Del Cueto-Aguilera alan R j.ménez-Rodríguez j.sé A González-González Héctor j.Maldonado-Garza Gastroenterology Service and Department of Internal Medicine Faculty of Medicine University Hospital "Dr. José E. González"Universidad Autónoma de Nuevo León

Gastrointestinal angiodysplasias (GIADs), also called angioectasias, are the most frequent vascular lesions. Its precise prevalence is unknown since most of them are asymptomatic. However, the incidence may be increasing since GIADs affect individuals aged more than 60 years and population life expectancy is globally increasing worldwide. They are responsible of about 5% to 10% of all gastrointestinal bleeding (GIB) cases. Most GIADs are placed in small bowel, where are the cause of 50 to 60% of obscure GIB diagnosed with video capsule endoscopy. They may be the cause of fatal severe bleeding episodes;nevertheless, recurrent overt or occult bleeding episodes requiring repeated expensive treatments and disturbing patient’s quality-of-life are more frequently observed. Diagnosis and treatment of GIADs (particularly those placed in small bowel) are a great challenge due to insidious disease behavior, inaccessibility to affected sites and limitations of available diagnostic procedures. Hemorrhagic causality out of the actively bleeding lesions detected by diagnostic procedures may be difficult to establish. No treatment guidelines are currently available, so there is a high variability in the management of these patients. In this review, the epidemiology and pathophysiology of GIADs and the status in the diagnosis and treatment, with special emphasis on small bowel angiodysplasias based on multiple publications, are critically discussed. In addition, a classification of GIADs based on their endoscopic characteristics is proposed. Finally, some aspects that need to be clarified in future research studies are highlighted.

关键词： Angiodysplasias Angioectasias Vascular malformations Epidemiology Pathogenesis Endoscopic treatment Somatostatin analogues

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第十二届国际热处理会议和展览会

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热处理 1991年第1期 1-11+32页

作者： alan j. HICK 张辅龙英国《金属热处理杂志》编辑

美国金属学会举办的国际热处理会议和展览会——同类会议中规模最大——自从1974年开始至今仍然是美国热处理工作者的头等大事。第12届国际热处理会议和展览会于1990年3月13～15日在美国印第安纳波利斯市的印第安纳会议中心召开,约有500... 详细信息

美国金属学会举办的国际热处理会议和展览会——同类会议中规模最大——自从1974年开始至今仍然是美国热处理工作者的头等大事。第12届国际热处理会议和展览会于1990年3月13～15日在美国印第安纳波利斯市的印第安纳会议中心召开,约有5000人次参加了会议,这次会议的特点是组织了一个空前的展览会,并且安排了22次分会(分会安排表略),会上由70位发言人作了技术介绍。虽然这次会议的内容不是十分典型的,但是关于炉气氛和热处理管理系统的内容还是令与会者感兴趣的,并对热

关键词：感应淬火设备印第安纳波利斯线材热处理车间装置感应加热设备流态床碳钢会议

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Sunlight responsive photocatalysts:AgBr/ZnO hybridna nomaterial

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Science China Chemistry 2012年第10期55卷 2128-2133页

作者： MENG alan QIU YanYan ZHANG LiNa XU Xiao LI Zhenj.ang State Key Laboratory Base of Eco-chemical Engineering College of Chemistry and Molecular EngineeringQingdao University of Science&TechnologyQingdao 266042China College of Electromechanical Engineering Qingdao University of Science&Technology Qingdao 266061China

A novel high-effective sunlight-induced AgBr/ZnO hybrid nanophotocatalyst has been synthesized and it was characterized by different techniques such as X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and ultraviolet-visible spectrophotometry (UV-vis). The AgBr/ZnO hybrid nanophotocatalyst has excellent photocatalytic activity for photodegradation of methyl orange (MO) under sunlight irradiation. The MO degradation efficiency for AgBr/ZnO is about 98% after 1 hour under sunlight irradiation. These results suggested that AgBr/ZnO is a promising candidate for the development of highly efficient sunlight photocatalysts. In addition, the photocatalytic mechanism of AgBr/ZnO under sunlight irradiation is illustrated and discussed.

关键词： AgBr/ZnO hybrid materials sunlight photocatalysis

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Failed biliary cannulation: Clinical and technical outcomes after tertiary referral endoscopic retrograde cholangiopancreatography

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World j.urnal of Gastroenterology 2011年第45期17卷 4993-4998页

作者： Michael P Swan Michael j.Bourke Stephen j.Williams Sina Alexander alan Moss Rick Hope David Ruppin Department of Gastroenterology and Hepatology Westmead Hospital

AIM: Prospective evaluation of repeat endoscopic retrograde cholangiopancreatography (ERCP) for failed Schutz grade 1 biliary cannulation in a high-volume center. METHODS: Prospective intention-to-treat analysis of patients referred for biliary cannulation following recent unsuccessful ERCP. RESULTS: Fifty-one patients (35 female; mean age: 62.5 years; age range: 40-87 years) with previous failed biliary cannulation were referred for repeat ERCP. The indication for ERCP was primarily choledocholithiasis (45%) or pancreatic malignancy (18%). Successful biliary can- nulation was 100%. The precut needle knife sphincterotomy (NKS) rate was 27.4%. Complications occurred in 3.9% (post-ERCP pancreatitis). An identif iable reason for initial unsuccessful biliary cannulation was present in 55% of cases. Compared to a cohort of 940 nave pa-pilla patients (female 61%; mean age: 59.9 years; age range: 18-94 years) who required sphincterotomy over the same time period, there was no statistical difference in the cannulation success rate (100% vs 98%) or postERCP pancreatitis (3.1% vs 3.9%). Precut NKS use was more frequent (27.4% vs 12.7%) (P = 0.017). CONCLUSION: Referral to a high-volume center following unsuccessful ERCP is associated with high technical success, with a favorable complication rate, compared to routine ERCP procedures.

关键词： Failed endoscopic retrograde cholangiopancreatography Failed biliary cannulation Unsuccessful biliary cannulation Tertiary referral endoscopic retrograde cholangiopancreatography Needle knife sphincterotomy Biliary cannulation Precut sphincterotomy Post endoscopic retrograde cholangiopancreatography pancreatitis

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流體力學

流體力學

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2010年

作者： alan T. McDonald Robert W. Fox Philip j. Pritchard

本書是針對流體力學入門課程而寫的。我們為達成這個目標所採用的方法，一如本書之前的各版本，都強調流體力學的物理概念，以及由基本原理入手的分析方法。本書的主要目標是幫助讀者發展出有條理的問題解決方法。因此，我們總是從控制...

ISBN: (纸本)9789572177013

本書是針對流體力學入門課程而寫的。我們為達成這個目標所採用的方法，一如本書之前的各版本，都強調流體力學的物理概念，以及由基本原理入手的分析方法。本書的主要目標是幫助讀者發展出有條理的問題解決方法。因此，我們總是從控制方程式開始，接著清楚地條列假設，並將有關的數學結果與對應的物理行為連結起來。

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