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Uncertainty quantification in the Permian Basin using conventional and modified bootstrap methodology

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Petroleum Research 2023年第4期8卷 439-454页

作者： Chukwuemeka O.Okoli Scott D.goddard Obadare O.Awoleke Department of Petroleum Engineering University of Alaska FairbanksFairbanks99775AlaskaUSA National Energy Technology Laboratory 1450 Queen Avenue SWAlbany97321OregonUSA Department of Mathematics&Statistics University of Alaska FairbanksFairbanks99775AlaskaUSA

Various uncertainty quantification methodologies are presented using a combination of several deter-ministic decline curve analysis models and two bootstrapping *** probabilistic models are applied to 126 sample wells from the Permian *** are presented for 12-72 months of pro-duction hindcast given an average well production history of 103 *** on the coverage rate and the forecast error(with the coverage rate being more significant in our choice of the best probabilistic models)and using up to one-half of the available production history for a group of sample wells from the Permian Basin,we find that the CBM-SEPD combination is the best probabilistic model for the Central Basin Platform,the MBM-Arps combination is the best probabilistic model for the Delaware Basin,the CBM-Arps is the best probabilistic model for the Midland Basin,and the best probabilistic model for the overall Permian Basin is the CBM-Arps when early time data is used as hindcast and CBM-SEPD for when one-quarter to one-half of the data is used as *** three-quarters or more of the available production history is used for analysis,the MBM-SEPD probabilistic model is the best combination in terms of both coverage rate and forecast error for all the sub-basins in the *** novelty of this work lies in its extension of bootstrapping methods to other decline curve analysis *** work also offers the engineer guidance on the best choice of probabilistic model whilst attempting to forecast production from the Permian Basin.

关键词： Uncertainty quantification Machine learning Bootstrapping Reservoir forecasting Frequentist probabilistic models

A numerical study of the South China Sea deep circulation and its relation to the Luzon Strait transport

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Acta Oceanologica Sinica 2002年第2期21卷 187-202页

作者： Yuan Dongliang1. goddard Earth Science and Technology Center, University of Maryland, Baltimore County Code 971, Laboratory for Hydrospheric Processes, NASa.goddard Space Flight Center, Greenbelt, MD 20771, USA goddard Earth Science and Technology Center University of Maryland Baltimore County Greenbelt MD 20771 United States Code 971 Laboratory for Hydrospheric Processes NASA/Goddard Space Flight Center Greenbelt MD 20771 United States

A fine-resolution MOM code is used to study the South China Sea basin-scale circulationand its relation to the mass transport through the Luzon Strait. The model domain includes the South China Sea, part of the East China Sea, and part of the Philippine Sea so that the currents in the vicinity of the Luzon Strait are free to evolve. In addition, all channels between the South China Sea and the Indonesian seas are closed so that the focus is on the Luzon Strait transport. The model is driven by specified Philippine Sea currents and by surface heat and salt flux conditions. For simplicity, no wind-stress is applied at the *** simulated Luzon Strait transport and the South China Sea circulation feature a sandwich vertical structure from the surface to the bottom. The Philippine Sea water is simulated to enter the South China Sea at the surface and in the deep ocean and is carried to the southern basin by western boundary currents. At the intermediate depth, the net Luzon Strait transport is out of the South China Sea and is fed by a western boundary current flowing to the north at the base of the thermocline. Corresponding to the western boundary currents, the basin circulation of the South China Sea is cyclonic gyres at the surface and in the abyss but an anti-cyclonic gyre at the intermediate depth. The vorticity balance of the gyre circulation is between the vortex stretching and the meridional change of the planetary vorticity. Based on these facts, it is hypothesized that the Luzon Strait transports are determined by the diapycnal mixing inside the entire South China Sea. The South China Sea plays the role of a 'mixing mill' that mixes the surface and deep waters to return them to the Luzon Strait at the intermediate depth. The gyre structures are consistent with the Stommel and Arons theory (1960), which suggests that the mixing-induced circulation inside the South China Sea should be cyclonic gyres at the surface and at the bottom but an anti-cyclonic gy

关键词： The South China Sea deep circulation the Luzon Strait transports

Potential Contribution of Combined Atmospheric Ca^(2+) and Mg^(2+) Wet Deposition Within the Continental U.S. to Soil Inorganic Carbon Sequestration

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Pedosphere 2013年第6期23卷 808-814页

作者： E.A.MIKHAILOVA M.a.goddard C.J.POST M.A.SCHLAUTMAN J.M.GALBRAITH School of Agricultural Forestand Environmental SciencesClemson University Department of Environmental Engineering and Earth Sciences Clemson University Department of Crop and Soil Environmental Sciences Virginia Tech

Soil inorganic carbon （SIC） stocks continuously change from the formation of pedogenic carbonates, a process requiring inputs of Ca2＋ and Mg2＋ ions. This study ranked the soil orders in terms of potential inorganic carbon sequestration resulting from wet Ca2＋ and Mg2＋ deposition from 1994 to 2003 within the continental United States. The analysis revealed that average annual atmospheric wet deposition of Ca2＋ and Mg2＋ was the highest in the Central Midwest-Great Plains region, likely due to soil particle input from loess-derived soils. The soil orders receiving the highest total average annual atmospheric wet Ca2＋ and Mg2＋ deposition, expressed as potential inorganic carbon formation （barring losses from erosion and leaching）, were： 1） Mollisols （1.1 × 10^8 kg C）, 2） Alfisols （8.4 × 10^7 kg C）, 3） Entisols （3.8 × 10^7 kg C）, and 4） Aridisols （2.8 × 10^7 kg C）. In terms of area-normalized result, the soil orders were ranked： 1） Histosols （73 kg C km-2）, 2） Alfisols and Vertisols （64 kg C km-2）, 3） Mollisols （62 kg C km-2）, and 4） Spodosols （52 kg C kin-2）. The results of this study provide an estimate of potential soil inorganic carbon sequestration as a result of atmospheric wet Ca2＋ and Mg2＋ deposition, and this information may be useful in assessing dynamic nature of soil inorganic carbon pools.

关键词： calcite carbon cycle dolomite pedogenic

Cortical and subcortical gamma amino acid butyric acid deficits in anxiety and stress disorders:Clinical implications

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World Journal of Psychiatry 2016年第1期6卷 43-53页

作者： Andrew W goddard Department of Psychiatry UCSF Fresno Medical Education and Research Program

Anxiety and stress disorders are a major public health issue. However, their pathophysiology is still unclear. The gamma amino acid butyric acid(GABA) neurochemical system has been strongly implicated in their pathogenesis and treatment by numerous preclinical and clinical studies, the most recent of which have been highlighted and critical review in this paper. Changes in cortical GABA appear related to normal personality styles and responses to stress. While there is accumulating animal and human neuroimaging evidence of cortical and subcortical GABA deficits across a number of anxiety conditions, a clear pattern of findings in specific brain regions for a given disorder is yet to emerge. Neuropsychiatric conditions with anxiety as a clinical feature may have GABA deficits as an underlying feature. Different classes of anxiolytic therapies support GABA function, and this may be an area in which newer GABA neuroimaging techniques could soon offer more personalized therapy. Novel GABAergic pharmacotherapies in development offer potential improvements over current therapies in reducing sedative and physiologic dependency effects, while offering rapid anxiolysis.

关键词： Brain imaging Anxiogenesis Gamma amino acid butyric acid Anxiety disorders Anxiolysis

Paul Cézanne, 1839-1906

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Paul Cézanne, 1839-1906

作者： (1950-)Becks-Malorny Ulrike goddard Phil.

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商务英语1000句 1版

An Overview of MODIS Radiometric Calibration and Characterization

2006年

作者：（英）Christopher goddard

本书收录了各种商务场景中使用的1000多个实用例句，涉及300多个出现频率较高的短语。

ISBN: (数字)7810787829

ISBN: (纸本)7810787829

本书收录了各种商务场景中使用的1000多个实用例句，涉及300多个出现频率较高的短语。

关键词：商务英语口语

来源：畅想之星图书光盘版（南... 评论

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Advances in Atmospheric Sciences 2006年第1期23卷 69-79页

作者： Xiaoxiong XIONG william BARNES Earth Sciences Directorate NASA/Goddard Space Flight Center Greenbelt MD 20771 USA University of Maryland Baltimore County Baltimore MD 21250 USA

The Moderate Resolution Imaging Spectroradiometer （MODIS） is one of the key instruments for NASA＇s Earth Observing System （EOS）, currently operating on both the Terra and Aqua satellites. The MODIS is a major advance over the previous generation of sensors in terms of its spectral, spatial, and temporal resolutions. It has 36 spectral bands： 20 reflective solar bands （RSB） with center wavelengths from 0.41 to 2.1 μm and 16 thermal emissive bands （TEB） with center wavelengths from 3.7 to 14.4 μm, making observations at three spatial resolutions： 250 m （bands 1-2）, 500 m （bands 3-7）, and lkm （bands 8-36）. MODIS is a cross-track scanning radiometer with a wide field-of-view, providing a complete global coverage of the Earth in less than 2 days. Both Terra and Aqua MODIS went through extensive pre-launch calibration and characterization at various levels. In orbit, the calibration and characterization tasks are performed using its on-board calibrators （OBCs） that include a solar diffuser （SD） and a solar diffuser stability monitor （SDSM）, a v-grooved flat panel blackbody （BB）, and a spectro-radiometric calibration assembly （SRCA）. In this paper, we present an overview of MODIS calibration and characterization activities, methodologies, and lessons learned from pre-launch characterization and in-orbit operation. Key issues discussed in this paper include in-orbit efforts of monitoring the noise characteristics of the detectors, tracking the solar diffuser and optics degradations, and updating the sensor＇s response versus scan angle. The experiences and lessons learned through MODIS have played and will continue to play major roles in the design and characterization of future sensors.

关键词： EOS remote sensing Terra Aqua MODIS sensor calibration radiometry

金属纳米催化剂二氧化碳电还原活性位点的原子解析

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金属纳米催化剂二氧化碳电还原活性位点的原子解析

Impacts of High Field Magnetic Fields on Processing of Selected Materials

中国化学会·第一届全国二氧化碳资源化利用学术会议

作者：程涛 william a.goddard 苏州大学功能纳米与软物质研究院 Materials and Process Simulation Center California Institute of Technology

纳米金属催化剂在二氧化碳电还原反应中表现出了明显优于同类体相催化剂的催化活性。例如,金纳米颗粒在低电压下可以几乎以100%的效率将二氧化碳还原为一氧化碳,铜纳米颗粒则可以有效的促进碳-碳偶联形成二碳和多碳产物。尽管已有大量... 详细信息

纳米金属催化剂在二氧化碳电还原反应中表现出了明显优于同类体相催化剂的催化活性。例如,金纳米颗粒在低电压下可以几乎以100%的效率将二氧化碳还原为一氧化碳,铜纳米颗粒则可以有效的促进碳-碳偶联形成二碳和多碳产物。尽管已有大量实验和理论工作试图解释纳米催化剂活性的起源,但是从原子水平上解析催化剂活性位点依然非常困难。在本工作中,我们利用多尺度模拟方法在计算机上模拟了金纳米催化剂和铜纳米催化剂在碳纳米管(CNT)上的气相沉积生长过程,并得到了一个负载在CNT上的10纳米厚度的金属颗粒(见图1)通过随机扫描催化剂表面位点,并利用反应中间体的反应能量作为描述符,我们成功地分辨出金纳米颗粒和铜纳米颗粒的催化位点的原子结构。以此为指导,我们通过计算机扫描的方法,预测了20种合金的催化表现。预测发现,金-铁合金具有潜在的高催化效率。通过与实验课题合作,我们成功的合成了金-铁催化剂,并实验验证了预测得到的高催化活性。我们通过原位模拟方法预测了反应中间体的振动谱,并通过与实验比对,成功辨认了两种重要的反应中间体。

关键词：原子水平的多尺度模拟纳米催化剂二氧化碳电还原计算机材料设计

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Journal of Iron and Steel Research International 2012年第S2期19卷 1054-1057页

作者： HAN Ke ZHANG Lin WANG Engang ZHOU Xiaoling CUI Baozhi goddard Robert WALSH Robert National High Magnetic Field Laboratory Key Laboratory of Electromagnetic Processing of Materials(Ministry of Education) Northeastern University Kunming University of Science and Technology

Various composite conductors and reinforcement materials are used for high field magnets in the USA National High Magnetic Field *** composite conductors are Cu based metal-metal composites,whereas most of reinforcement materials have faced-center-cubic matrix and relatively low ductile-to-brittle transformation temperatures so they can perform at cryogenic *** the operation of the magnets,the mechanical stresses,magnetic fields and other extreme environments are imposed to the materials and materials are 'processed' during the service of the *** instance,the conductors in the magnets are likely to experience higher temperatures than ambient during the operations if the electrical current density for producing high field is sufficiently *** of the conductors are fabricated by cold rolling or drawing that introduces lattice distortions and high densities of interfaces in unit *** temperature and high field exposure of the conductor may affect the characteristics of the lattice distortions and the *** lattice distortion and density of the interface affects the mechanical properties of the conductors,such as the tensile and yield strength,as well as the electric conductivity of the ***,the materials after service are expected to have different properties compared to as-received *** first portion of our paper will focus on relationship between the service and processing of the magnet materials in high field *** high magnetic field can be used directly to process *** some cases,the material properties can be improved by more than 50%if the processing is undertaken in the high magnetic *** improvement is due to the microstructure changes induced by high magnetic *** the behaviors of the materials after they are exposed to high magnetic fields helps us to make good use of the high field processing approach efficiently to fabricate better mater

关键词： high strength materials phase transformation high magnetic fields magnetic materials