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Variation and mechanisms of clastic reservoir quality in the Paleogene Shahej.e Formation of the Dongying Sag, Bohai Bay Basin, China

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Petroleum Science 2014年第2期11卷 200-210页

作者： Zhang Qin Zhu Xiaomin ronald j.steel Zhong Dakang College of Geosciences China University of Petroleum State Key Laboratory of Petroleum Resource and Prospecting China University of Petroleum Department of Geological Sciences The University of Texas at Austin

Reservoir quality varies greatly in the Shahej.e Formation in the Dongying Sag. It is essential to analyze the variation and mechanisms of reservoir quality for determining the controlling factors based on cores, porosity measurements and fluid inclusion techniques and so on. The sandstones in the fluvial, （fan） delta-front have the best reservoir quality due to the depositional conditions mechanically controlling the petrology configuration and the primary porosity, and chemically influencing the diagenesis and development of secondary pores. The activity of the boundary faults and the sedimentary facies dominate the variation of reservoir quality in different areas and intervals. The reservoir quality varies with the position of sandstone beds in different vertical models of sandstone and mudstone. This mainly arose from the strong cementation or strong dissolution in the sandstone caused by the diagenesis evolution of adj.cent mudstone. With higher oil saturation reservoir quality is better because the hydrocarbon charge favors dissolution and restricts cementation. Diagenesis, depositional conditions and tectonic setting are the key controls of reservoir quality in the Shahej.e Formation of the Dongying Sag.

关键词： Reservoir quality variation clastic reservoir quality hydrocarbon charge vertical models ofsandstone and mudstone controlling factor

Why ecosystem characteristics predicted from remotely sensed data are unbiased and biased at the same time-and how this affects applications

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Forest Ecosystems 2024年第1期11卷 24-31页

作者： Goran Ståhl Terj. Gobakken Svetlana Saarela Henrik j.Persson Magnus Ekstrom Sean P.Healey Zhiqiang Yang j.han Holmgren Eva Lindberg Kenneth Nystrom Emanuele Papucci Patrik Ulvdal Hans OleØrka Erik Næsset Zhengyang Hou Håkan Olsson ronald E.McRoberts Department of Forest Resource Management Swedish University of Agricultural Sciences90183UmeåSweden Faculty of Environmental Sciences and Natural Resource Management Norwegian University of Life SciencesÅsNorway USDA Forest Service Rocky Mountain Research StationOgdenUTUSA The Key Laboratory for Silviculture and Conservation of Ministry of Education Beijing Forestry UniversityBeijing100083China Department of Forest Resources University of MinnesotaSt.PaulMNUSA

Remotely sensed data are frequently used for predicting and mapping ecosystem characteristics,and spatially explicit wall-to-wall information is sometimes proposed as the best possible source of information for ***,wall-to-wall information typically relies on model-based prediction,and several features of model-based prediction should be understood before extensively relying on this type of *** such feature is that model-based predictors can be considered both unbiased and biased at the same time,which has important implications in several areas of *** this discussion paper,we first describe the conventional model-unbiasedness paradigm that underpins most prediction techniques using remotely sensed(or other)auxiliary *** this point of view,model-based predictors are typically ***,we show that for specific domains,identified based on their true values,the same model-based predictors can be considered biased,and sometimes severely *** suggest distinguishing between conventional model-bias,defined in the statistical literature as the difference between the expected value of a predictor and the expected value of the quantity being predicted,and design-bias of model-based estimators,defined as the difference between the expected value of a model-based estimator and the true value of the quantity being *** show that model-based estimators(or predictors)are typically design-biased,and that there is a trend in the design-bias from overestimating small true values to underestimating large true ***,we give examples of applications where this is important to acknowledge and to potentially make adj.stments to correct for the design-bias *** argue that relying entirely on conventional model-unbiasedness may lead to mistakes in several areas of application that use predictions from remotely sensed data.

关键词： Bias Model-based inference Design-based inference

Foundamentals of abnormal psychology ronald j. Comer 2nd ed.

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Foundamentals of abnormal psychology Ronald J. Comer

Business Ricky W. Griffin, ronald j. Ebert 6th ed.

1999年

作者： ronald j. Comer

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Habitat structure directly affects aggression in convict cichlids Archocentrus nigrofasciatus

2002年

作者： Ricky W. Griffin ronald j. Ebert

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Current Zoology 2010年第1期56卷 52-56页

作者： Anthony j. BARLEY ronald M. COLEMAN Department of Biological Sciences California State University Sacramento California 95819-6077 USA

Aggressive behavior can be an important factor in determining how animals use and divide space and resources. Previous studies have shown that aggression in fishes can be influenced by a variety of factors, including water temperature and resource levels. In this study, we tested if the amount of habitat structure in the environment affected aggression levels in female convict cichlids Archocentrus nigrofasciatus. We performed a laboratory experiment in which we placed female convict cichlids into an aquarium with low or high amounts of habitat structure and monitored the dominant female＇s behavior toward the subordinate female. Aggressive behavior in convict cichlids primarily consists of chases and bites. We found that the total time the dominant female spent chasing the subordinate female was greater when there was a low amount of habitat structure as compared to when there was a high amount of habitat structure. We also found that both the average duration of a chasing bout and the number of bites directed at the subordinate fish increased when there was a low amount of structure, but the number of chases did not. These results indicate that increased habitat structural complexity decreases aggressive behavior in convict cichlids [Current Zoology 56 （1）： 52-56, 2010].

关键词： Neotropical Life-history Female-female competition Fish Resource competition

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碎屑岩深水扇研究

海洋地质与第四纪地质 2010年第1期30卷 39-46页

作者：阮伟 ronald j.steel 黄洁中国地质大学(北京)能源学院北京100083 Department of Geological Sciences Jackson School of GeosciencesUniversity of Texasat Austin Bureau of Economic Geology Jackson School of GeosciencesUniversity of Texasat Austin

由于认识到深水储层中富存烃类,碎屑岩深水扇引起了地质学家的兴趣。近年来,碎屑岩深水扇的研究取得了相当大的新进展,回顾和总结近年来该领域取得的进步和提出的新观点,总的来说,这些新的观点包括:碎屑岩深水扇不仅在低位体系域时产生... 详细信息

由于认识到深水储层中富存烃类,碎屑岩深水扇引起了地质学家的兴趣。近年来,碎屑岩深水扇的研究取得了相当大的新进展,回顾和总结近年来该领域取得的进步和提出的新观点,总的来说,这些新的观点包括:碎屑岩深水扇不仅在低位体系域时产生,在沉积供给充足的高位体系域时也能够出现,但有时即使低位体系域时也不能形成深水扇;碎屑岩深水扇通常为浊流成因,但也有一些为碎屑流引起,其内部向上变粗或变厚的反韵律不明显。基于这些新观点,一些新的深水扇模式被提出,这些新的碎屑岩深水扇的模式对其形成和性质的因素,如海平面变化、构造、沉积速率、深水扇类型和性质等,考虑更加全面。结合这些新的认识,提出的深水扇模式包括:富砾、富砂、泥砂混合和富泥型模式,而每种又根据物源的性质分为点物源,线物源和多物源、这些模式考虑因素更加全面、精确,更能反映深水扇的实质,它是深水烃类勘探预测砂体分布有效的工具。

关键词：碎屑岩深水扇高位深水扇浊流深水扇模式

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潮汐沉积过程及沉积特征研究综述

古地理学报 2023年第5期25卷 1069-1089页

作者：彭旸 ronald j.steel 龚承林魏小洁盛莉娜油气资源与工程全国重点实验室中国石油大学(北京)北京102249 中国石油大学(北京)地球科学学院北京102249 j.ckson School of Geosciences The University of Texas at AustinAustinTexas 78712USA 中国地质科学院地质力学研究所北京100081

潮汐沉积不仅是重建古地理沉积环境和古气候的重要依据,而且同时也是油气勘探的重要储集层类型。在月球和太阳的引力作用下,地球上海平面发生周期性涨落形成潮流。潮流的方向和流速具有周期性变化的特征,这决定潮流在沉积物的搬运和沉... 详细信息

潮汐沉积不仅是重建古地理沉积环境和古气候的重要依据,而且同时也是油气勘探的重要储集层类型。在月球和太阳的引力作用下,地球上海平面发生周期性涨落形成潮流。潮流的方向和流速具有周期性变化的特征,这决定潮流在沉积物的搬运和沉积过程中与其他类型的流体有所不同。潮汐作用过程可形成多种沉积构造或沉积特征,例如潮汐韵律层、过渡性层理、潮汐束、再作用面、复合交错层理、双向交错层理、双黏土层、浮泥沉积等。这些沉积构造或沉积特征发育在不同的潮汐沉积环境中,受到复杂的潮汐沉积过程的控制,使得沉积体系的内部构型和空间分布相对复杂。在油气勘探实践中,需要对沉积微相进行精细刻画,通过岩石记录反推沉积过程,进而预测相应的沉积微相和砂体展布规律。作者通对潮汐形成机制和影响因素、潮汐搬运和沉积过程、潮汐作用相关的沉积构造或特征以及相应的沉积环境进行梳理和总结,旨在加深国内学者对潮汐沉积的认识,了解潮汐沉积的研究进展,并为相关油气勘探和开发提供一定的科学指导。

关键词：潮汐沉积过程沉积构造三角洲河口湾潮坪

深海碎屑岩层序地层学50年(1970-2020)重要进展

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沉积学报 2022年第2期40卷 292-318页

作者：龚承林 ronald j.steel 彭旸王英民李东伟油气资源与探测国家重点实验室(中国石油大学(北京)) 北京102249 中国石油大学(北京)地球科学学院北京102249 Department of Geological Sciences Jackson School of GeosciencesUniversity of TexasAustinTexas 78712USA

层序地层学是当前地球科学研究颇为关注的领域,被广泛应用于沉积盆地分析和油气勘探。碎屑岩层序地层学理论方法源于海相盆地,是在被动大陆边缘油气勘探实践的基础上凝练而来的,至今已经历了约50年的发展历程。本文梳理了深海碎屑岩层... 详细信息

层序地层学是当前地球科学研究颇为关注的领域,被广泛应用于沉积盆地分析和油气勘探。碎屑岩层序地层学理论方法源于海相盆地,是在被动大陆边缘油气勘探实践的基础上凝练而来的,至今已经历了约50年的发展历程。本文梳理了深海碎屑岩层序过去50年发展历程中的重要进展(包括1970—2000年的经典海相碎屑岩层序地层学、2000—2010年的陆架边缘层序地层学研究、和2010—2020年的海相碎屑岩层序地层学标准化);讨论了当前深海碎屑岩层序地层学研究的热点领域。

关键词：深海碎屑岩层序地层深水沉积重要进展

A pancreatic player in dementia:pathological role for islet amyloid polypeptide accumulation in the brain

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Neural Regeneration Research 2023年第10期18卷 2141-2146页

作者： Angelina S.Bortoletto ronald j.Parchem Center for Cell and Gene Therapy Stem Cell and Regenerative Medicine CenterDepartment of NeuroscienceDepartment of Molecular and Cellular BiologyTranslational Biology and Molecular Medicine ProgramMedical Scientist Training ProgramBaylor College of MedicineHoustonTXUSA

Type 2 diabetes mellitus patients have a markedly higher risk of developing *** multiple factors contribute to this predisposition,one of these involves the increased secretion of amylin,or islet amyloid polypeptide,that accompanies the pathophysiology of type 2 diabetes *** amyloid polypeptide accumulation has undoubtedly been implicated in various forms of dementia,including Alzheimer’s disease and vascular dementia,but the exact mechanisms underlying islet amyloid polypeptide’s causative role in dementia are *** this review,we have summarized the literature supporting the various mechanisms by which islet amyloid polypeptide accumulation may cause neuronal damage,ultimately leading to the clinical symptoms of *** discuss the evidence for islet amyloid polypeptide deposition in the brain,islet amyloid polypeptide interaction with other amyloids implicated in neurodegeneration,neuroinflammation caused by islet amyloid polypeptide deposition,vascular damage induced by islet amyloid polypeptide accumulation,and islet amyloid polypeptide-induced *** are very few therapies approved for the treatment of dementia,and of these,clinical responses have been controversial at ***,investigating new,targetable pathways is vital for identifying novel therapeutic strategies for treating *** such,we conclude this review by discussing islet amyloid polypeptide accumulation as a potential therapeutic target not only in treating type 2 diabetes mellitus but as a future target in treating or even preventing dementia associated with type 2 diabetes mellitus.

关键词： Alzheimer’s disease amylin amyloid dementia diabetes human islet amyloid polypeptide islet amyloid polypeptide protofibrils type 2 diabetes mellitus vascular dementia