检索结果-南通市图书馆

Experimental Study of the Interaction between Building Clusters and Flash Floods

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

Journal of Mountain Science 2015年第5期12卷 1334-1344页

作者： DU Jun he Xiao-yan {1. zhao-yin ZHANG Chen-di LI Wen-{2. Changjiang River Scientific research {1. china {1. of Water Resources and Hydropower {2. research Center on Flood and Drought Disaster Reduction of t{1. Ministry of Water Resources State Key Laboratory of Hydroscience and Engineering Tsinghua University Gansu Coal Geological exploration {1.

In recent years, flash flood disasters have occurred frequently in southwest china due to t{1. increased frequency of extreme climate events. To solve this problem, great efforts have been made in studying t{1. process of flash flood. However, little attention was paid on bearing body of hazard, t{1. clusters of buildings. Thus t{1. real disaster mechanism of flash flood remains ***, based on t{1. experiments of artificial flash floods in a conceptual solid model, this paper focuses on t{1. flood-impacted inundation characteristics of t{1. building clusters at different locations of t{1. gully model, in order to obtain a better understanding of t{1. disaster process and t{1. interaction between t{1. flash floods and building clusters. T{1. results showed that, in a typical smallscale flash flood gully with hot and dry climate, 1.clusters of buildings on an alluvial fan could reduce about 35% of t{1. flooding area by blocking t{1. diffusion of t{1. flood to t{1. depression areas, and could also promote t{1. deposition in lower reac{1.s of t{1. river channel by blocking t{1. overbank flow from going back into t{1. channel, making t{1. width-depth ratio of t{1. channel larger. 2. T{1. flash flood rates of disaster and hazard on t{1. alluvial fan are generally hig{1.r than that of t{1. inner gully. For t{1. inner gully,buildings located on t{1. beac{1.s along t{1. lower river and t{1. transitional areas of t{1. straight channel and channel bends can easily be affected because of t{1.ir lower elevations. For t{1. alluvial fan, buildings nearby t{1. meanders suffer t{1. greatest impacts because of bank collapsing and flooding. 3) T{1. safe vertical distance from a building to t{1. river channel is 1. m for t{1. buildings in t{1. inner gully under extreme floods. Below this threshold, t{1. smaller t{1. vertical distance is, t{1. greater t{1. risk exposure is. For t{1. buildings on t{1. alluvial fan, especially for t{1. buildings near t{1. concave bank of t{1. top rush point,t{1. horizontal distance is more

关键词： Flash floods Building clusters Settlement's distribution Disaster process Fieldmodel experiment

川东北五宝场地区侏罗系沙溪庙组储层特征及主控因素

在线全文

学校读者我要写书评

暂无评论

岩性油气藏 2024年第5期36卷 87-98页

作者：张晓丽王小娟张航陈沁关旭赵正望王昌勇谈曜杰中国石油西南油气田公司勘探开发研究院成都610041 中国石油西南油气田公司川东北气矿四川达州635000 中国石油西南油气田公司开发事业部成都610041 成都理工大学沉积地质研究院成都610059

川东北地区侏罗系沙溪庙组致密砂岩具有较大的勘探潜力。利用铸体薄片、扫描电镜、阴极发光、X射线衍射、孔渗、压汞和包裹体均一温度等分析测试资料,对川东北五宝场地区侏罗系沙溪庙组储层特征进行了研究,并结合地震解释成果分析了储... 详细信息

川东北地区侏罗系沙溪庙组致密砂岩具有较大的勘探潜力。利用铸体薄片、扫描电镜、阴极发光、X射线衍射、孔渗、压汞和包裹体均一温度等分析测试资料,对川东北五宝场地区侏罗系沙溪庙组储层特征进行了研究,并结合地震解释成果分析了储层致密化原因以及优质储层分布特征。研究结果表明:(1.川东北五宝场地区侏罗系沙溪庙组砂岩储层具有较高的长石和岩屑含量,分选和磨圆一般,结构成熟度和成分成熟度均较低,储层孔隙度大多小于6%,渗透率大多小于1.mD,孔渗相关性及孔隙结构均较差,主要发育裂缝-孔隙型储层。(2.研究区侏罗系沙溪庙组储层处于中成岩阶段A期,钙质胶结作用导致储层局部致密化,埋藏压实作用和浊沸石胶结是导致沙溪庙组砂岩致密化的主要原因,油气在储层致密化前后持续充注。(3)早期绿泥石环边胶结、大气水的淋滤以及构造破裂作用是研究区主要的建设性成岩作用,对原生粒间孔的保存、次生溶孔的形成和提高储层渗透性具有重要意义。(4)沉积微相、成岩作用和构造破裂作用共同控制了优质储层的分布,具早期绿泥石环边胶结、浊沸石弱胶结、长石溶蚀、裂缝发育的水下分流河道是相对优质砂岩储层的主要发育区。

关键词：致密砂岩水下分流河道绿泥石环边胶结压实作用浊沸石胶结构造破裂作用沙溪庙组侏罗系五宝场地区四川盆地

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

古龙页岩油勘探开发进展及发展对策

大庆石油地质与开发 2024年第4期43卷 125-136页

作者：崔宝文王瑞白云风刘立峰刘鑫王建凯刘召吕建才张红丽中国石油大庆油田有限责任公司黑龙江大庆163458 中国石油大庆油田有限责任公司勘探开发研究院黑龙江大庆163712 多资源协同陆相页岩油绿色开采全国重点实验室黑龙江大庆163712 中国石油勘探开发研究院北京100083

古龙页岩油是继常规油之后最为现实的接替资源,目前已经成为大庆油田增储上产的主要领域。通过系统阐述古龙页岩油勘探开发历程和分区带落实资源潜力,为古龙页岩油未来发展制定合理规划。结果表明:古龙页岩油主要经历了勘探评价、先导... 详细信息

古龙页岩油是继常规油之后最为现实的接替资源,目前已经成为大庆油田增储上产的主要领域。通过系统阐述古龙页岩油勘探开发历程和分区带落实资源潜力,为古龙页岩油未来发展制定合理规划。结果表明:古龙页岩油主要经历了勘探评价、先导试验和扩大试验3个勘探开发阶段;富有机质页岩具有面积广、厚度大、生油能力强等特点,页岩油富集的物质基础雄厚;古龙页岩油纵向上主要富集于下油组(Q_(1.―Q_(4)油层)和上油组的Q_(9)油层,平面上具有全盆地分布的特征,在古龙凹陷深凹区地质条件最为优越;按照轻质油带核心区―斜坡区―稀油带―低熟页岩油的规划,逐步对古龙页岩油实施勘探研究及开发动用;基于原生源储的富集规律,建立了原位成藏理论,古龙页岩油提交了1.0}68×1.^(8)t的预测地质储量及2.04×1.^(8)t的探明地质储量,指导了国家级示范区及全国重点实验室建设;应用体积法估算轻质油带Q9油层资源量为9.6×1.^(8)t,轻质油带Q_(2.―Q_(8)油层整体资源量为38.8×1.^(8)t,三肇地区稀油带资源量达1.×1.^(8)t以上,能够有效支撑古龙页岩油革命行动目标。通过加强理论研究,推动技术进步,推进管理创新,实现降本增效,古龙页岩油必将成为大庆油田资源接续和百年油田建设的重要领域。

关键词：古龙页岩油研究进展形成条件分布特征资源潜力发展对策

维普期刊数据库博看期刊

An efficient route to prepare suspended monolayer for feasible optical and electronic characterizations of two-dimensional materials

在线全文

学校读者我要写书评

暂无评论

InfoMat 2022年第2期4卷 126-138页

作者： Yuan Huang Yun-Kun wang {1.-Yu Huang {2.-Hua Zhang Xu Han yang yang Yunan Gao Lei Meng Yushu wang {2.g-Zhou Geng Li-Wei Liu Lin zhao Zhi-Hai Cheng {1.-Feng Liu Ze-Feng Ren Hui-Xia yang Yufeng Hao Hong-Jun Gao {1.g-Jiang Zhou Wei Ji Ye-Liang wang Advanced research {1. of Multidisciplinary Science Beijing Institute of TechnologyBeijingChina beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijingChina Songshan Lake Materials Laboratory DongguanChina State Key Laboratory for Artificial Microstructure and Mesoscopic Physics School of PhysicsPeking UniversityBeijingChina Frontiers Science Center for Nanooptoelectronics&Collaborative Innovation Center of Quantum Matter BeijingChina State Key Laboratory of Molecular Reaction Dynamics Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalianChina Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuanChina Minzu University of china BeijingChina National Laboratory of Solid State Microstructures College of Engineering and Applied SciencesJiangsu Key Laboratory of Artificial Functional MaterialsCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjingChina School of Information and Electronics MIIT Key Laboratory for Low-Dimensional Quantum Structure and DevicesBeijing Institute of TechnologyBeijingChina Department of Physics and beijing Key Laboratory of Optoelectronic Functional Materials&Micro-Nano Devices Renmin University of ChinaBeijingChina National Center for Nanoscience and Technology(NCNST)of china BeijingChina Haian institute of New Technology Nanjing UniversityHaianChina University of Chinese Academy of Sciences BeijingChina

Two-dimensional(2.)materials are highly sensitive to substrates,interfaces,and t{1. surrounding *** 2. materials are free from substrate-induced effects,thus an ideal approach to study t{1.ir intrinsic ***,it is very challenging to prepare large-area suspended 2. materials with high *** we report a universal method,based on pretreatments of densely patterned hole array substrates with eit{1.r oxygenplasma or gold film deposition,to prepare large-area suspended mono-and few-layer 2. *** structural,optical,and electrical characterization tools were used to fully evaluate t{1. improved performance of various suspended 2. *** of t{1.se observations reported in this study are:(1.Observation of a new Raman low frequency mode for t{1. suspended MoS_(2.;(2.Significantly stronger photoluminescence(PL)and second harmonic generation(SHG)signals of suspended WSe_(2.,which enables t{1. study of new optical transition processes;(3)T{1. low energy electron diffraction pattern on suspended MoS_(2. also exhibits much sharper spots than that on t{1. supported area;and(4)T{1. mobility of suspended grap{1.ne device approac{1.s 300000 cm^(2. V^(-1. s^(-1.,which is desirable to explore t{1. intrinsic properties of *** work provides an innovative and efficient route for fabricating suspended 2. materials,and we expect that it can be broadly used for studying intrinsic properties of 2. materials and in applications of hybrid active nanophotonic and electronic devices.

关键词： mechanical exfoliation photoluminescence Raman spectrum suspended 2. materials

A method and results of color calibration for the Chang'e-3 terrain camera and panoramic camera

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

research in Astronomy and Astrophysics 2014年第12期14卷 1557-1566页

作者： xin Ren Chun-Lai Li Jian-Jun Liu Fen-Fei {1. Jian-Feng {2. En-Hai Liu Bin Xue Ru-Jin zhao Key Laboratory of Lunar and Deep Space exploration National Astronomical ObservatoriesChinese Academy of Sciences Xi’an institute of Optics and Precision Mechanics Chinese Academy of Sciences institute of Optics and Electronics Chinese Academy of Sciences

The terrain camera （TCAM） and panoramic camera （PCAM） are two of the major scientific payloads installed on the lander and rover of the Chang＇e 3 mission re- spectively. They both use a Bayer color filter array covering CMOS sensor to capture color images of the Moon＇s surface. RGB values of the original images are related to these two kinds of cameras. There is an obvious color difference compared with human visual perception. This paper follows standards published by the International Commission on Illumination to establish a color correction model, designs the ground calibration experiment and obtains the color correction coefficient. The image qual- ity has been significantly improved and there is no obvious color difference in the corrected images. Ground experimental results show that：（1） Compared with uncor- rected images, the average color difference of TCAM is 4.30, which has been reduced by 62.1%. （2. The average color differences of the left and right cameras in PCAM are 4.14 and 4.16, which have been reduced by 68.3% and 67.6% respectively.

关键词： Moon -- methods: data analysis -- techniques: image processing

Quantitative evaluation model of shale oil adsorption:A case study of the first member of Cretaceous Qingshankou Formation in northern Songliao Basin,NE china

在线全文

学校读者我要写书评

暂无评论

Petroleum exploration and {1. 2023年第5期50卷 1137-1150页

作者： LI Jinbu wang Min LU Shuangfang LIU Liang LI Ming ZHANG Yuc{1.n wang {2. zhao {2.bin ZHANG Jinyou zhao Ying National Key Laboratory of Deep Oil&Gas China University of Petroleum(East China)Qingdao 266580China guangzhou {1. of Geochemistry Chinese Academy of SciencesGuangzhou 510640China Sanya Offshore Oil&Gas research {1. Northeast Petroleum UniversitySanya572025China exploration and {1. {2. institute of Petrochina Daqing Oilfield Company Daqing 163712China

A quantitative evaluation model that integrates kerogen adsorption and clay pore adsorption of shale oil was proposed,and the evaluation charts of adsorption-swelling capacity of kerogen(Mk)and adsorbed oil capacity of clay minerals(Mc)were established,taking the 1st member of Cretaceous Qingshankou Formation in the northern Songliao Basin as an *** model and charts were derived from swelling oil experiments performed on naturally evolved kerogens and adsorbed oil experiments on clays(separated from shale core samples).They were constructed on the basis of clarifying the control law of kerogen maturity evolution on its adsorption-swelling capacity,and considering the effect of both the clay pore surface area that occupied by adsorbed oil and formation *** results are obtained in four aspects:(1)For the Qing 1 Member shale,with the increase of maturity,Mk *** Ro of 0.83%–1.65%,Mk is about 50–2.0 mg/g.(2.The clay in shale adsorbs *** is 0.63 mg/m^(2.,and about 15%of the clay pore surface is occupied by adsorbed oil.(3)In the low to medium maturity stages,the shale oil adsorption is controlled by organic *** Ro>1.3%,the shale oil adsorption capacity is contributed by clay pores.(4)The oil adsorption capacity evaluated on the surface at room temperature is 8%–2.%(avg.15%)higher than that is held in the *** proposed evaluation model reveals the occurrence mechanisms of shale oils with different maturities,and provides a new insight for estimating the reserves of shale oil under formation temperature conditions.

关键词： shale oil adsorbed oil occurrence state mobility Cretaceous Qingshankou Formation Evaluation model Songliao Basin

development and calibration of t{1. Moon-based EUV camera for Chang'e-3

在线全文

学校读者我要写书评

暂无评论

research in Astronomy and Astrophysics 2014年第12期14卷 1654-1663页

作者： Bo Chen Ke-Fei Song zhao-Hui Li Qing-Wen Wu Qi-Liang Ni Xiao-Dong wang Jin-Jiang Xie Shi-Jie Liu Ling-Ping he Fei he Xiao-{2.g wang Bin Chen Hong-Ji Zhang Xiao-Dong wang Hai-Feng wang xin Zheng Shu-Lin E Yong-Cheng wang Tao Yu Liang Sun Jin-Ling wang Zhi wang Liang yang Qing-Long Hu Ke Qiao Zhong-Su wang Xian-Wei yang Hai-Ming Bao Wen-{2.g Liu Zhe Li Ya Chen yang Gao Hui Sun Wen-Chang Chen Changchun institute of Optics Fine Mechanics and Physics Chinese Academy of Sciences

The process of {1. and calibration for the first Moon-based ex- treme ultraviolet （EUV） camera to observe Earth＇s plasmasphere is introduced and the design, test and calibration results are presented. The E... 详细信息

The process of development and calibration for the first Moon-based ex- treme ultraviolet （EUV） camera to observe Earth＇s plasmasphere is introduced and the design, test and calibration results are presented. The EUV camera is composed of a multilayer film mirror, a thin film filter, a photon-counting imaging detector, a mech- anism that can adjust the direction in two dimensions, a protective cover, an electronic unit and a thermal control unit. The center wavelength of the EUV camera is 30.2.nm with a bandwidth of 4.6nm. The field of view is 14.7° with an angular resolution of 0.08°, and the sensitivity of the camera is 0.11 count s-1 Rayleigh-1. The geomet- ric calibration, the absolute photometric calibration and the relative photometric cal- ibration are carried out under different temperatures before launch to obtain a matrix that can correct geometric distortion and a matrix for relative photometric correction, which are used for in-orbit correction of the images to ensure their accuracy.

关键词： Chang'e-3 -- EUV camera: development: calibration -- Earth's plas-masp{1.re -- lunar exploration

Kai xin San ameliorates scopolamine-induced cognitive dysfunction

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration research 2019年第5期14卷 794-804页

作者： Yu-Min Xu xin-C{1.n wang Ting-Ting Xu Hong-Ying Li Shang-Yan {1.i Na-Chuan Luo Hong wang Wei zhao Shu-Huan Fang Yun-Bo C{1.n Li guan Yong-Qi Fang Shi-Jie Zhang Qi wang Wei-Xiong Liang institute of Clinical Pharmacology Guangzhou University of Chinese Medicine First Affiliated Hospital of henan University of Chinese Medicine School of Food and Pharmaceutical Engineering Zhaoqing University First Affiliated Hospital of guangzhou University of Chinese Medicine Department of Neurology The First Affiliated Hospital Guangzhou Medical University guangdong Provincial Hospital of Chinese Medicine

Kai xin San(KXS, containing ginseng, hoelen, polygala, and acorus), a traditional Chinese {1.rbal compound, has been found to regulate cognitive dysfunction; however, its mechanism of action is still unclear. In this study, 72.specific-pathogen-free male Kunming mice aged 8 weeks were randomly divided into a vehicle control group, scopolamine group, low-dose KXS group, moderate-dose KXS group, high-dose KXS group, and positive control group. Except for t{1. vehicle control group and scopolamine groups(which received physiological saline), t{1. doses of KXS(0.7, 1.4 and 2.8 g/kg per day) and donepezil(3 mg/kg per day) were gastrointestinally administered once daily for 2.weeks. On day 8 after intragastric treatment, t{1. behavioral tests were carried out. Scopolamine group and intervention groups received scopolamine 3 mg/kg per day through intraperitoneal injection. T{1. effects of KXS on spatial learning and memory, pathological changes of brain tissue, expression of apoptosis factors, oxidative stress injury factors, synapse-associated protein, and cholinergic neurotransmitter were measured. T{1. results confirmed t{1. following.(1. KXS shortened t{1. escape latency and increased residence time in t{1. target quadrant and t{1. number of platform crossings in t{1. Morris water maze.(2. KXS increased t{1. percentage of alternations between t{1. labyrinth arms in t{1. mice of KXS groups in t{1. Y-maze.(3) Nissl and terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling staining revealed that KXS promoted t{1. production of Nissl bodies and inhibited t{1. formation of apoptotic bodies.(4) Western blot assay showed that KXS up-regulated t{1. expression of anti-apoptotic protein Bcl-2.and inhibited t{1. expression of pro-apoptotic protein Bax. KXS up-regulated t{1. expression of postsynaptic density 95, synaptophysin, and brain-derived neurotrophic factor in t{1. cerebral cortex and hippocampus.(5) KXS increased t{1. level and activity of choline acetyltransferase, acetylcholi

关键词： Kai xin San cognitive dysfunction scopolamine hydrobromide neuroprotection oxidative stress synaptic dysfunction apoptosis cholinergic system dysfunction donepezil neural regeneration

Synchrotron radiation facility-based quantitative evaluation of pore structure heterogeneity and anisotropy in coal

在线全文

学校读者我要写书评

暂无评论

Petroleum exploration and {1. 2019年第6期46卷 1195-1205页

作者： SUN Yingfeng zhao Yi{1. {2. {1. PENG Lei SUN Qiang School of Energy and Mining Engineering China University of Mining and Technology(Beijing)Beijing 100083China School of Emergency Management and Safety Engineering China University of Mining and Technology(Beijing)Beijing 100083China beijing Key Laboratory for Precise Mining of Intergrown Energy and Resources China University of Mining and Technology(Beijing)Beijing 100083China School of Mechanics and Civil Engineering China University of Mining and Technology(Beijing)Beijing 100083China research {1. of Petroleum {2.&development PetroChinaBeijing 100083China

In order to quantify coal pore structure heterogeneity and anisotropy,synchrotron radiation SAXS(Small Angle X-ray Scattering)was applied to obtain the SAXS images of two different rank coal *** surface fractal dimension(D1.and pore fractal dimension(D2.were obtained by processing the image *** pore structure heterogeneity of two coal samples was quantified by pore fractal dimension(D2..Pore fractal dimension of xinzhouyao coal is 2.74 and pore fractal dimension of Tangshan coal is *** a result,the pore structure heterogeneity of xinzhouyao coal is stronger than that of Tangshan coal.3D pore structure imaging was achieved by synchrotron radiation *** selected Region of Interest(ROI)of coal sample was divided into a certain number of *** structure heterogeneity was quantified by calculating the limit of the relative standard deviation of each subvolume’s *** heterogeneity value of xinzhouyao coal pore structure is 3.2. and the heterogeneity value of Tangshan coal pore structure is *** a result,the pore structure heterogeneity of xinzhouyao coal is also stronger than that of Tangshan coal,namely,pore structure heterogeneity from synchrotron radiation SAXS and synchrotron radiation nano-CT is *** the corresponding relationship between the pore structure anisotropy and the permeability anisotropy,the quantification of pore structure anisotropy was realized by computing the permeability tensor of pore structure using the Lattice Boltzmann method(LBM),and the pore structure anisotropy was characterized by the eigenvalues and eigenvectors of the permeability *** pore structure anisotropy obtained by the method proposed in this paper was validated by the pore structure geometrical morphology.

关键词： synchrotron radiation SAXS synchrotron radiation nano-CT coal pore structure heterogeneity anisotropy