检索结果-南通市图书馆

Acta Pharmaceutica Sinica B 2017年第2期7卷 223-229页

作者： Hongtao Liu Guoxun Pang jinfeng ren Yue Zhao Juxian Wang Department of Pharmacy Hebei General HospitalShijiazhuang 050051China Institute of Medicinal Biotechnology Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100050China

The apical sodium-dependent bile acid transporter(ASBT) is the main transporter to promote re-absorption of bile acids from the intestinal tract into the enterohepatic *** of ASBT could increase the excretion of bile acids,thus increasing bile acid synthesis and consequently cholesterol ***,ASBT is an attractive target for developing new cholesterol-lowering *** this report,a series of 1-(2,4-bifluorophenyl)-7-dialkylamino-1,8-naphthyridine-3-carboxamides were designed as inhibitors of *** of them demonstrated potency against ASBT transport of bile *** particular,compound 4a_1 was found to have the best activity,resulting in 80.1%inhibition of ASBT at10μmol/L.

关键词： ASBT inhibitors Bile acids 1-(2,4-Bifluorophenyl)-7dialkylamino-1,8-naphthyridine-3-carboxa mides Cholesterol-lowering drug NC-1

Sequence Stratigraphy and Sedimentary Facies of Lower Oligocene Yacheng Formation in Deepwater Area of Qiongdongnan Basin,Northern South China Sea:Implications for Coal-Bearing Source Rocks

在线全文

学校读者我要写书评

暂无评论

Journal of Earth Science 2014年第5期25卷 871-883页

作者： jinfeng ren Hua Wang Ming Sun Huajun Gan Guangzeng Song Zhipeng Sun Key Laboratory of Tectonics and Petroleum Resources Ministry of Education China University of Geosciences Faculty of Earth Resources China University of Geosciences Guangzhou Marine Geological Survey Zhanjiang Branch of CNOOC Limited

For unveiling coal-bearing source rocks in terrestrial-marine transitional sequences, the sequence stratigraphic framework and sedimentary facies of Lower Oligocene Yacheng Formation of Qiongdongnan Basin were investigated using seismic profiles, complemented by well bores and cores. Three third-order sequences are identified on the basis of unconformities on basin margins and correlative conformities in the basin center, namely SQYC3, SQYC2 and SQYC1 from bottom to top. Coal measure in Yacheng Formation of Qiongdongnan Basin were deposited within a range of facies associations from delta plain/tidal zone to neritic sea, and three types of favourable sedimentary facies associations for coal measure were established within the sequence stratigraphic framework, including braided delta plain and alluvial fan, lagoon and tidal flat, and fan delta and coastal plain facies associations. Results shown that, in the third-order sequences, coal accumulation in landward areas（such as delta plain） of the study area predominantly correlates with the early transgressive systems tract（TST） to middle highstand systems tract（HST）, while in seaward areas（such as tidal flat-lagoon） it correlates with the early TST and middle HST. The most potential coal-bearing source rocks formed where the accommodation creation rate（Ra） and the peat-accumulation rate（Rp） could reach a state of balance, which varied among different sedimentary settings. Furthermore, intense tectonic subsidence and frequent alternative marine-continental changes of Yacheng Formation during the middle rift stage were the main reasons why the coal beds shown the characteristics of multi-beds, thin single-bed, and rapidly lateral changes. The proposed sedimentary facies associations may aid in predicting distribution of coal-bearing source rocks. This study also demonstrates that controlling factors analysis using sequence stratigraphy and sedimentology may serve as an effective approach for coal-bearing characteristics

关键词： Qiongdongnan Basin Yacheng Formation sequence stratigraphy sedimentary facies,coal measure.

Geochemical Characteristics and Gas-to-Gas Correlation of Two Leakage-type Gas Hydrate Accumulations in the Western Qiongdongnan Basin, South China Sea

在线全文

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2022年第2期96卷 680-690页

作者： LAI Hongfei QIU Haijun LIANG Jinqiang KUANG Zenggui FANG Yunxin ren jinfeng LU Jing’an Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou 511458China MNR Key Laboratory of Marine Mineral Resources Guangzhou Marine Geological SurveyMinistry of Natural ResourcesGuangzhou 510075China

In recent years,a series of highly saturated leakage-type gas hydrates have been discovered in the western Qiongdongnan Basin(QDNB),South China *** on the molecular compositional and isotopic characteristics of the gas samples relevant to the gas hydrates collected from the two leakage-type gas hydrate accumulations in the GMGS5 and GMGS6 drilling zones,a detailed geochemical gas-to-gas correlation was conducted in this study,in order to further understand the geochemical characteristics and possible hydrocarbon sources of these gas *** natural gas relevant to the gas hydrates in the GMGS5 block is characterized by wet gas(67.96%0.9)and lack molecular and carbon isotope *** 40%‒60%of the methane within the gas hydrate is of microbial origin,while the C^(2+)gas components are typical coal-type gas that are derived from thermogenic source rocks or deeply-buried natural gas *** addition,typical in situ primary microbial methane(−80.6‰rent,suggesting that they may have been derived from different source *** results further indicate that the deeply-buried thermogenic gas significantly contributed to the shallowly-buried gas hydrates in the western QDNB and multiple effective thermogenic source kitchens provided the hydrocarbon gas in the gas hydrate accumulations.

关键词： gas hydrate gas genetic type hydrocarbon gas source geochemical characteristics

Sedimentary Characteristics and Model of Gravity Flow Depositional System for the First Member of Upper Miocene Huangliu Formation in Dongfang Area, Yinggehai Basin, Northwestern South China Sea

在线全文

学校读者我要写书评

暂无评论

Journal of Earth Science 2014年第3期25卷 506-518页

作者： Ming Sun Hua Wang Jihua Liao Huajun Gan Jun Xiao jinfeng ren Shu'e Zhao Key Laboratory of Tectonics and Petroleum Resources Ministry of Education China University of Geosciences Guangzhou Marine Geological Survey Faculty of Earth Resources China University of Geosciences CNOOC Research Institute

The gravity flow deposit were mainly developed in the lowstand systems tract（LST） of the first member of Upper Miocene Huangliu Formation（Ehl1） in Dongfang area, Yinggehai Basin, has become a valuable target for gas exploration and production. The gravity flow sedimentary characteristics of lithofacies associations, sedimentary texture, seismic facies and logging facies were described in detail on the basis of integrated analysis of cores, logging and seismic data. The sedimentary microfacies types composed of neritic sandbar, continental shelf mud, main channel, bifurcated or cross-cutting distributary channel, overspill, and natural levee are revealed under the constraint of high resolution sequence stratigraphic framework in the Ehl1. The gravity flow deposit system in the LST is divided into three evolution stages corresponding to periods of three parasequence sets. The gravity flow deposit was induced in the early LST, expanded rapidly in the middle LST and decreased slightly in the late LST. But its developing scale decreased sharply in the transgression systems tract（TST） and finally vanished in the highstand systems tract（HST）. This spatial evolution rule is constrained by the integrated function of sediments supply of the Vietnam Blue River in the LST, the development of local gradient change in sea floor（micro-topography, i.e., flexure slope break）, and the fall in relative sea level. On the basics of the deep study of the coupling relationship among the three main control factors, the sedimentary model is established as an optimal component of ＂source-channel-sink＂ for shallow marine turbidite submarine fan.

关键词： Yinggehai Basin Dongfang area the first member of Upper Miocene Huangliu Formation(Ehl1) sedimentation characteristics gravity flow sedimentary model.

Identification methods of coal-bearing source rocks for Yacheng Formation in the western deepwater area of South China Sea

在线全文

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2015年第4期34卷 19-31页

作者： ren jinfeng ZHANG Yingzhao WANG Hua WANG Yahui GAN Huajun HE Weijun SUN Ming SONG Guangzeng Key Laboratory of Tectonics and Petroleum Resources (China University of Geosciences) Ministry of Education Faculty of Earth Resources China University of Geosciences Zhanjiang Branch of China National Offshore Oil Corporation (CNOOC) Limited Guangzhou Marine Geological Survey

Owing to the fact that the coal-beds are with the characteristics of multi-beds, thin single-bed, rapid lateral changes and deep burial, coal-bearing source rocks are difficult to be identified and predicted, especially in the lower exploration deepwater area. In this paper, a new integrative process utilizing geology and geophysics is proposed for better predicting the distribution of coal-bearing source rocks. Coal-beds were identified by the logging responses of“three higher, three lower, and one expand”and carbargilite were recognized by the characteristics of“four higher and one lower”. Based on the above logical decision, coal-beds and carbargilite can be distinguished automatically by cluster analysis of logging curves in verticality. Within the constraints of well-seismic calibration, the coal-beds group also can be detected in horizontality by the integrated representation of“negative phase, higher Q, lower impedance and lower frequency”within the seismic data. However, the distribution of coal-bearing source rocks utilizing geophysical methodology may do not conform to the geological rules of coal accumulation. And then the main geological controlling factors of coal accumulation are comprehensively analyzed as follows：（1） Paleotopography and tectonic subsidence determine the planar range of terrestrial-marine transitional facies markedly;（2） The relative sea level changes affect the accommodation space and shoreline migration, and limit the vertical range of coal-beds. More specifically, the relationship between the accommodation creation rate and the peat accumulation rate is a fundamental control on coal accumulation. The thickest and most widespread coals form where those two factors reached a state of balance;（3） The supply of autochthonous clasts and the distance between deposition places and paleovegetation accumulated area are the critical factor to form abundant coal, which means that if deposition area is close to paleouplift, there would be suff

关键词： Qiongdongnan Basin deepwater area coal-bearing source rocks geological and geophysical methods

Paleogene Tectonic Evolution Controls on Sequence Stratigraphic Patterns in the Central Part of Deepwater Area of Qiongdongnan Basin, Northern South China Sea

在线全文

学校读者我要写书评

暂无评论

Journal of Earth Science 2014年第2期25卷 275-288页

作者： Guangzeng Song Hua Wang Huajun Gan Zhipeng Sun Xiaolong Liu Meng Xu jinfeng ren Ming Sun Di Sun Key Laboratory of Tectonics and Petroleum Resources China University of Geosciences Faculty of Earth Resources China University of Geosciences Research Institute of China National Offshore Oil Corporation Ltd.-Zhanjiang Research Institute of China National Offshore Oil Corporation Ltd. Shandong Province Experimental Institute of Geological Sciences Key Laboratory of Gold Mineralization Process and Resources Utilization Ministry of Land and Resources Petroleum Development Centre Shengli Oilfield Company SINOPEC

In active rift basins, tectonism is extremely important for sequence stratigraphic patterns, affecting both the sequence architecture and internal makeup. Sequence stratigraphic framework of a Paleogene rift succession in Qiongdongnan Basin, northern South China Sea, was built using seismic profiles, complemented by well logs and cores. One first-order and three second-order sequences were identified on the basis of basin-scale unconformities, and seven third-order sequences are defined by unconformities along the basin margins and correlative conformities within the central basin. Through unconformity analysis and backstripping procedure, the Paleogene synrift tectonic evolution of deep- water area of Qiongdongnan Basin was proved to be episodic, which can be divided into rifting stage-I, rifting stage-II and rifting stage-III. Episodic rifting resulted in the formation of various types of struc- tural slope break belts, which controlled different architectures and internal makeup of sequences. This study enhances the understanding of the control of tectonic evolution on sequence stratigraphic pat- terns and establishes relevant patterns in a typical rift basin, and further proposes the favorable sand- stone reservoirs developing in different sequence stratigraphic patterns, which will be pretty helpful for subtle pool exploration in deepwater area of petroliferous basins.

关键词： South China Sea deepwater area tectonic evolution structural slope break belt se-quence stratigraphic pattern.

Teaching Protective Relaying Design and Application Using New Modeling and Simulation Tools

在线全文

学校读者我要写书评

暂无评论

Journal of Energy and Power Engineering 2012年第5期6卷 762-770页

作者： jinfeng ren Mladen Kezunovic Department of Electrical and Computer Engineering Texas A&M University College Station 77843 Texas USA

As the smart grid concepts are emphasized lately, the need to modernize the power engineering education is also well recognized. This paper presents a set of newly developed modeling, simulation and testing tools aimed at better understanding of the design concept and related applications for protective relaying and substation automation solutions for the smart grid. Since the smart grid applications require integration of data from multiple IEDs （intelligent electronic devices）, understanding properties of each IED type in detail, as well as their responses to the power system events is needed. In addition, understanding the communication requirements to perform data integration is also important. To illustrate how the mentioned smart grid issues may be taught, the following advanced teaching approaches are presented：（1） Use of modeling and simulation means to better understand interaction between the relays and power system; （2） Use of IED test facilities to better understand performance of physical devices used for protection, monitoring and control; （3） Utilization of communication network modeling tools to simulate the communication network within SAS （substation automation system）. Examples showing the use of proposed techniques for teaching the fundamentals and applications are presented. The examples demonstrate the adequacy and efficiency of the proposed techniques.

关键词： Smart grid power engineering education modeling protective relaying simulation lED (intelligent electronic device) SAS (substation automation system).

Sedimentary characteristics and genetic mechanism of the giant ancient pockmarks in the Qiongdongnan Basin,northern South China Sea

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

Acta Oceanologica Sinica 2023年第2期42卷 120-133页

作者： Pengfei Xiong Cong Cheng Zenggui Kuang jinfeng ren Jinqiang Liang Hongfei Lai Zigui Chen Jiang Lu Xiaoyu Fang Tao Jiang Hubei Key Laboratory of Marine Geological Resources China University of GeosciencesWuhan430074China Guangzhou Marine Geological Survey Ministry of Natural ResourcesGuangzhou510075China Southern Marine Science and Engineering Guangdong Laboratory(Zhanjiang) Zhanjiang524088China

In the late Miocene,giant ancient pockmarks,which are fairly rare globally,developed in the Qiongdongnan *** this paper,to determine the sedimentary characteristics and genetic mechanism of these giant ancient pockmarks in the Yinggehai Formation of the Qiongdongnan Basin,based on high-resolution 3D seismic data and multiattribute fusion technologies,we analyzed the planar distribution and seismic facies of the ancient pockmarks and compared the characteristics of the ancient pockmarks with those of channels,craters,and hydrate ***,we also discussed the implications of the fluid escape system and paleo-bottom current activity in the ancient pockmark development area and analyzed the influence of the ancient pockmarks on the paleoclimate in this ***,an evolutionary model was proposed for the giant ancient *** model shows that the giant ancient pockmarks in the southern Qiongdongnan Basin were affected by both deep fluid escape and lateral transformation of paleobottom *** addition,the giant ancient pockmarks contributed to the atmospheric CO_(2)concentration in the late Miocene and played a great role in the contemporary evaluation of deepwater petroleum exploration.

关键词： giant ancient pockmark bottom current fluid escape Yinggehai Formation Qiongdongnan Basin

南海南沙海槽大型海底滑坡的发育特征及成因机制

在线全文

学校读者我要写书评

暂无评论

地球科学 2021年第3期46卷 1058-1071页

作者：任金锋孙鸣韩冰中国地质调查局天然气水合物工程技术中心广东广州510075 南方海洋科学与工程广东省实验室(广州) 广东广州511458 广州海洋地质调查局广东广州510075

大型海底滑坡的研究对认识海底斜坡的稳定性具有重要意义.利用最新的高精度多波束数据和重处理的二维地震资料,识别了南海南沙海槽一处大型海底滑坡,描述了其发育特征,探讨了其可能的形成原因.该滑坡体覆盖面积达6 300 km2,横向最宽50 ... 详细信息

大型海底滑坡的研究对认识海底斜坡的稳定性具有重要意义.利用最新的高精度多波束数据和重处理的二维地震资料,识别了南海南沙海槽一处大型海底滑坡,描述了其发育特征,探讨了其可能的形成原因.该滑坡体覆盖面积达6 300 km2,横向最宽50 km,延伸最远140 km.上部源头区外形呈半环形,滑坡后壁的高度落差200~350 m,平均坡度0.7°,发育基底剪切面和掀斜断块.中部滑移区呈拱形,分布于1 600~2 400 m水深段,平均坡度1°~3°,发育基底侵蚀面和大量残余块体.下部堆积区呈扇形,分布于2 400~2 800 m水深段,平均坡度0.1°~1.0°,发育大型碎屑流朵体和逃逸块体.研究表明不断隆升的背斜脊对高供给率沉积物的阻挡是海底斜坡失稳的内在条件,而高通量流体的聚集以及天然气水合物的分解使其变得更加不稳定.

关键词：海底滑坡背斜脊天然气水合物分解南沙海槽海洋地质

在线全文

学校读者我要写书评

暂无评论

北京旧城四合院区域绿化水平衡量指标探究

城市规划 2013年第5期37卷 85-89页

作者：任晋锋北京大学城市与环境学院北京市规划委员会西城分局

在我国城市规划建设中,衡量一个地区的绿化效果普遍采用的指标是"绿地率",但在北京大部分的旧城改造项目中,绿地率很难达到规定指标的要求。本文分析了北京旧城四合院区域空间结构、建筑形式的特殊性,并比较了传统四合院区域和现代小区... 详细信息

在我国城市规划建设中,衡量一个地区的绿化效果普遍采用的指标是"绿地率",但在北京大部分的旧城改造项目中,绿地率很难达到规定指标的要求。本文分析了北京旧城四合院区域空间结构、建筑形式的特殊性,并比较了传统四合院区域和现代小区绿化的CO2固定量,得出结论认为以绿地率作为绿化水平衡量指标的评估方法在旧城四合院区域改造更新中是不合适的,而以乔木数量、综合绿化覆盖率、绿色容积率、CO2固定量等作为衡量绿化的指标比较适宜的。同时,文章也为用来衡量绿化生态效果的CO2固定量的计算方法和相关绿化标准制定提供了一种思路。

关键词：四合院区域绿化指标绿地率 CO2固定量