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商业周刊（中文版） 2024年第4期 10-14页

作者： Siddharth Philip Anthony Palazzo Julie Johnsson Charlotte ryan Danny Lee Mary Schlangenstein 晴川(译) 不详

●对手波音正因737Max的质量问题而深陷泥沼,借此时机,空客已开始规划全新机型,以期在未来数十年里称霸业内1987年初,法国南部某机场内上演了不同寻常的一幕。当时还是王储的查尔斯王子站在一个登机扶梯上,轻轻地将一个超大瓶内的香槟... 详细信息

●对手波音正因737Max的质量问题而深陷泥沼,借此时机,空客已开始规划全新机型,以期在未来数十年里称霸业内1987年初,法国南部某机场内上演了不同寻常的一幕。当时还是王储的查尔斯王子站在一个登机扶梯上,轻轻地将一个超大瓶内的香槟洒在空客SE A320喷气机的机头上,他的妻子戴安娜王妃看着这一切,脸上带着她标志性的似显困惑的微笑。随后,现场激光华彩、干冰升腾,为1400名到场嘉宾开启了一场奢华庆典——毕竟,那是在80年代。

关键词：法国南部 A320 空客

Using ground penetrating radar to assess the variability of snow water equivalent and melt in a mixed canopy forest, Northern Colorado

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Frontiers of Earth Science 2017年第3期11卷 482-495页

作者： ryan W. WEBB Institute of Arctic and Alpine Research University of Colorado Boulder Boulder CO 80309-0450 USA

Snow is an important environmental variable in headwater systems that controls hydrological processes such as streamflow, groundwater recharge, and evapotran- spiration. These processes will be affected by both the amount of snow available for melt and the rate at which it melts. Snow water equivalent （SWE） and snowmelt are known to vary within complex subalpine terrain due to terrain and canopy influences. This study assesses this variability during the melt season using ground penetrating radar to survey multiple plots in northwestern Colorado near a snow telemetry （SNOTEL） station. The plots include south aspect and flat aspect slopes with open, coniferous （subalpine fir, Abies lasiocarpa and engelman spruce, Picea engelmanii）, and deciduous （aspen, popu- lous tremuooides） canopy cover. Results show the high variability for both SWE and loss of SWE during spring snowmelt in 2014. The coefficient of variation for SWE tended to increase with time during snowmelt whereas loss of SWE remained similar. Correlation lengths for SWE were between two and five meters with melt having correlation lengths between two and four meters. The SNOTEL station regularly measured higher SWE values relative to the survey plots but was able to reasonably capture the overall mean loss of SWE during melt. Ground Penetrating Radar methods can improve future investiga- tions with the advantage of non-destructive sampling and the ability to estimate depth, density, and SWE.

关键词： headwaters snowmelt snow water equiva-lent ground penetrating rdar SNOTEL

Helicobacter pylori:High dose amoxicillin does not improve primary or secondary eradication rates in an Irish cohort

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World Journal of Clinical Cases 2024年第16期12卷 2773-2779页

作者： Conor Costigan Aoife M O'Sullivan Jim O'Connell Shreyashee Sengupta Thomas Butler Stephen Molloy Fintan John O'Hara Barbara ryan Niall Breslin Sarah O'Donnell Anthony O'Connor Sinead Smith Deirdre McNamara Trinity Academic Gastroenterology Group School of Medicine-Trinity College DublinDublin D2Ireland Department of Gastroenterology Tallaght University HospitalDublin D24 NR0AIreland

BACKGROUND Helicobacter pylori(***)eradication rates have fallen globally,likely in large part due to increasing antibiotic resistance to traditional *** areas of high clarithromycin and metronidazole resistance such as ours,Maastricht VI guidelines suggest high dose amoxicillin dual therapy(HDADT)can be considered,subject to evidence for local *** this study we assess efficacy of HDADT therapy for *** eradication in an Irish *** To assess the efficacy of HDADT therapy for *** eradication in an Irish cohort as both first line,and subsequent therapy for patients diagnosed with *** All patients testing positive for *** in a tertiary centre were treated prospectively with HDADT(amoxicillin 1 g tid and esomeprazole 40 mg bid×14 d)over a period of 8 *** was confirmed with Urea Breath Test at least 4 wk after cessation of therapy.A delta-over-baseline>4%was considered *** demographics and treatment outcomes were recorded,analysed and controlled for basic demographics and prior *** *** One hundred and ninety-eight patients were identified with *** infection,10 patients were excluded due to penicillin allergy and 38 patients refused follow up *** all 139 were included in the analysis,55%(n=76)were female,mean age was 46.6 ***,93(67%)of patients were treatment-naïve and 46(33%)had received at least one previous course of *** groups were statistically ***-reported compliance with HDADT was 97%,mild side-effects occurred in 7%.There were no serious adverse drug *** the eradication rate for our cohort was 56%(78/139).Eradication rates were worse for those with previous treatment[43%(20/46)vs 62%(58/93),P=0.0458,odds ratio=2.15].Age and Gender had no effect on eradication *** Overall eradication rates with HDADT were *** being a simple and possibly better tolerated regime,these results do not

关键词： Helicobacter pylori eradication Helicobacter pylori High dose amoxicillin High dose amoxicillin dual therapy Triple therapy

Nonlinear Control of Magnetically-geared Drive-trains

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International Journal of Automation and computing 2013年第4期10卷 319-326页

作者： ryan Montague Chris Bingham Department of Computer Science University of York School of Engineering University of Lincoln

The paper considers certain impedimental issues related to the use of magnetic gearbox and magnetic coupling technologies in high performance servo control systems. A prototype magnetic coupling is used as a basis for demonstrating that the underlying torque transfer characteristic is significantly nonlinear when transmitted torque approaches the maximum designed pull-out torque of the device. It is shown that linear controllers for speed control proportional plus integral （PI） and position control proportional plus derivative （PD） result in acceptable performance provided the magnetic coupling operates below 80 % of designed pull-out torque. To fully compensate for the inherent nonlinearity of the torque transfer characteristic, feedback linearizing control laws and state transformations are derived resulting in exactly linear input-output characteristic for position and speed control of magnetically-geared drive-trains. With the addition of state feedback, the closed-loop dynamics for both position and speed control of a magnetically-geared drive-train can be designed to satisfy the integral of time multiplied by absolute error （ITAE） optimized linear response for a step input. Outstanding results are demonstrated through simulation and experimental real-time implementation on a demonstrator magnetically-geared drive-train.

关键词： Magnetic gears magnetic couplings linear control nonlinear control feedback linearization.

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重新审视美国国债市场的容量和弹性

金融市场研究 2024年第8期 48-57页

作者：彼得·瑞恩徐恒革(编译) 证券行业和金融市场协会不详

近年来,市场更为频繁出现严重的干扰事件和波动性加剧现象,美国国债市场的容量和弹性受到质疑。这凸显了两个结构性问题:国债发行量快速增长和银行资本金要求限制了交易商提供流动性的能力。近期,关于银行机构实施《巴塞尔协议Ⅲ》最终... 详细信息

近年来,市场更为频繁出现严重的干扰事件和波动性加剧现象,美国国债市场的容量和弹性受到质疑。这凸显了两个结构性问题:国债发行量快速增长和银行资本金要求限制了交易商提供流动性的能力。近期,关于银行机构实施《巴塞尔协议Ⅲ》最终资本改革要求的提案中的交易账簿基本审查(FRTB)和证券融资交易担保品最低折扣率框架,将进一步束缚交易商资产负债表,并严重扰乱国债回购市场的运作。而且结合修订全球系统重要性银行资本附加费计算方式的提案,将极大限制交易商在美国国债现货或期货期权市场的做市能力。此外,在美国国债市场扩大中央清算适用范围等市场结构改革举措将放大上述审慎规则对市场的负面作用。建议监管机构全面评估提案措施的成本和收益,根据需要进行实质性修订,促进而不是破坏美国国债市场的弹性,这对于维持美国政府低融资成本、全球金融稳定和美国经济增长至关重要。

关键词：巴塞尔协议Ⅲ 美国国债市场 FRTB 市场容量市场弹性

Heat stress management in underground mines

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International Journal of Mining Science and Technology 2017年第4期27卷 651-655页

作者： ryan Anderson Euler De Souza K1 Mine Maintenance Mosaic Potash Esterhazy SOA2AO Canada Department of Mining Engineering Queen's University Kingston KTL3N6 Canada

Heat management must be maintained within the mine working environment to minimize stress on equipment and personnel. The issue is a growing concern as mines continue to expand in size, depth and infrastructure. Heat management is a concern as it relates to both heat sensitive equipment and more importantly the health and safety of the workers found within the mine. Proper application of engineering protocols and work practice controls will have a direct impact on the health and safety of workers and increased productivity. Using continuous monitoring stations placed in strategic locations throughout the mine to capture the environmental conditions, various strategies can be used in the planning and prevention of potential hazard exposure. Economic analysis is used to select the most feasible strategy for heat stress control. This paper presents a step by step methodology that may be considered by ventilation specialists to effectively implement a heat management control system. A case study based on a detailed heat management assessment conducted for a potash mine in Saskatchewan, Canada is presented.

关键词： Heat Management Enthalpy Mine Environment monitoring

Climate change,coastal built heritage,and critical challenges facing the heritage law frameworks of the United States,United Kingdom,and France

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Built Heritage 2022年第1期6卷 42-54页

作者： ryan Rowberry Georgia State University College of Law 85 Park PlaceAtlantaGA 30303USA

Climate change poses a particular threat to the world's unique built heritage-historic buildings,sites monuments,and *** preserving built heritage resources from climate change becomes a global priority,understanding the current inadequacies of legal frameworks designed to protect built heritage in coastal areas is *** by identifying and examining these shortfalls can countries create resilient legal policies and tools that better protect coastal built heritage from the immediate and long-term effects of climate *** on previous comparative cultural heritage law scholarship,this article describes the legal frameworks that the United States,United Kingdom,and France use to protect their respective built heritage in coastal areas and identifies two critical challengesfacing eachcountry.

关键词： Climate change Built heritage law Legal frameworks Challenges United States United Kingdom France

CFD investigation of dense phase pneumatic conveying at a pipeline enlargement

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Particuology 2012年第2期10卷 176-183页

作者： Don McGlinchey Andrew Cowell ryan Crowe School of Engineering and Computing Glasgow Caledonian University Glasgow Scotland UK

The practice of stepping a conveying line is not new and there are many examples in industry; however, the details of the flow behaviour at the step have not been extensively studied. Three step geometries were modelled： an ＇abrupt＇ step and two ＇gradual＇ step-up geometries from a pipe bore of 75-100 ram. The flow behaviour of a single plug of material passing through these geometries was investigated using the ＇Eulerian＇ CFD model from Fluent. Solids volume fractions were recorded at 0.01 s time steps at several point locations, and visualised throughout the pipe.

关键词： Pneumatic conveyingStepped pipelinePlug flowCFD

Numerical analyses of pile performance in laterally spreading frozen ground crust overlying liquefiable soils

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Earthquake Engineering and Engineering Vibration 2018年第3期17卷 491-499页

作者： Xiaoyu ryan Zhang Zhaohui Joey Yang Mueser Rutledge Consulting Engineers New YorkNY 10122USA College of Engineering University of AlaskaAnchorageAK 99508USA

Lateral spread of frozen ground crust over liquefied soil has caused extensive bridge foundation damage in the past winter earthquakes.A shake table experiment was conducted to investigate the performance of a model pile in this scenario and revealed unique pile failure *** modelling results provided valuable data for validating numerical *** paper presents analyses and results of this experiment using two numerical modeling approaches： solid-fluid coupled finite element（FE） modeling and the beam-on-nonlinear-Winkler-foundation（BNWF） method.A FE model was constructed based on the experiment configuration and subjected to earthquake *** and pile response results were presented and compared with experimental results to validate this *** BNWF method was used to predict the pile response and failure mechanism.A p-y curve was presented for modelling the frozen ground crust with the free-field displacement from the experiment as *** responses were presented and compared with those of the experiment and FE *** was concluded that the coupled FE model was effective in predicting formation of three plastic hinges at ground surface,ground crust-liquefiable soil interface and within the medium dense sand layer,while the BNWF method was only able to predict the latter two.

关键词： frozen ground crust lateral spread Finite Element (FE) modeling BNWF method