检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

图书馆旅游信息开发初探

图书馆论坛 2002年第3期22卷 111-113页

作者：黄坚段连秀黄勇中国地质大学图书馆湖北武汉430074 中国地质大学出版社湖北武汉430074 武汉长山学校湖北武汉430074

尽管旅游业现已成为国家支柱产业 ,但旅游学在图书馆学中还没有相应的地位 ,未能形成完整的学科 ,本文就图书馆如何开发旅游信息服务做了阐述 ,从理论高度上提出了旅游信息开发利用的原则 ,并结合实际做了一次有益的探索。

关键词：旅游信息独特性系统性市场导向图书馆旅游信息服务旅游信息资源开发利用

Diatoms from the southwestern continental slope,South China Sea,and their paleoenvironmental significance since the last glacial times

在线全文

学校读者我要写书评

暂无评论

Progress in Natural Science:Materials International 2009年第10期19卷 1413-1418页

作者： Meiqin Suna,b,Dongzhao Lana,b,Zhimin Cao a a Institute of Ocean geoscience,Ocean university of China,Qingdao 2.6100,China b Third Institute of Oceanography,State Oceanic Administration,Xiamen 361005,China Institute of Ocean geoscience Ocean University of China Qingdao 266100 China Third Institute of Oceanography State Oceanic Administration Xiamen 361005 China

A quantitative study was undertaken on diatoms from cores(SA08-34) obtained from the southwestern continental slope of the South China Sea(SCS).A total of 165 diatom species belonging to 45 genera were *** constructed a stratigraphic subdivision and correlation according to the characteristics of diatom assemblages together with 14C dating and carbonate *** also discuss the sedimentary environment in the sea area since the last glacial *** research shows that the diatom assemblages coincide with inter-glacial and glacial times,and changes in diatom abundance reflect the instability of the climate in the southern part of the SCS,such that shortterm,temperature descending events correlate with the interglacial *** abundance of diatoms is relevant to interglacial and glacial times,since high abundance values were associated with an interglacial interval,and low abundance values with the last glacial *** assume that strong upwelling developed in the interglacial interval,the development of which was influenced by variations of monsoons in the East Asian region.

关键词： Diatoms Last glacial times Sedimentary environment South China Sea

TOC changes in the process of thermal evolution of source rock and its controls

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China Earth Sciences 2004年第Z2期47卷 141-149页

作者： ZHONG Ningning1, LU Shuangfang2. HUANG Zhilong1, ZHANG Yousheng1, XUE Haitao2.& PAN Changchun3 1. The Key Lab of Petroleum Accumulation Mechanism of State Educational Ministry at university of Petroleum, Beijing 102.49, China 2. Exploration geoscience Department of Daqing Petroleum Institute, Daqing 163000, China 3. Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China The Key Lab of Petroleum Accumulation Mechanism of State Educational Ministry at university of Petroleum Beijing 102249 China Exploration geoscience Department of Daqing Petroleum Institute Daqing 163000 China Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China

Through geological observation, simulation in laboratory and numerical modeling, the factors that control the changes in total organic content (TOC) of source rock have been studied. When the formula DTOC=(TOC0-TOC)/TOC0 (original organic carbon content in the rock) is used to measure the TOC (total organic carbon content) changes in the source rock through geological time, the degrees and directions of such changes are determined by losses and relative amounts both of organic and inorganic matter in the source rock. The DTOC equa-tion, which is used to calculate the loss rate in the process of maturation for the source rock, is therefore obtained by analyzing the mass balance relations. For a certain type of source rock with a certain maturation history, the changes of its TOC respond only to the rates of hydrocarbon generation and expulsion. In actual cases of geological entities, DTOC generally ranges from -0.05 to 0.2. while the calculated reconversion coefficient (k) for organic carbon content remains between 0.90 and 1.2.. Only in an ideal situation where there are extremely high rates of hydrocarbon generation and expulsion can the DTOC value experience significant changes, with k reaching up to 2.5. It is concluded, therefore, that the cri-terion for carbonates source rock assessment, based on reconverting the TOC to the value of its original state, may have overestimated the course of the carbon-reduction, which is likely in many cases to make a poor source rock sound better.

关键词： source rock appraisal, carbonates, low limit of organic matter abundance, rate of hydrocarbon generation and expulsion, TOC value.

MICRO－SEDIMENT　ARY　FACIES　AND　DIAGENESIS　OF　THE　PALEOGENE　SYSTEM　IN　THE　LIAODONG　BAY

在线全文

学校读者我要写书评

暂无评论

Scientia Geologica Sinica 1995年第4期 439-454页

作者： Zhao Chenglin Liu Menghui and Yang Congxiao (geoscience Department, university of Petroleum, Beijing 102.00)

ＭＩＣＲＯ－ＳＥＤＩＭＥＮＴＡＲＹＦＡＣＩＥＳＡＮＤＤＩＡＧＥＮＥＳＩＳＯＦＴＨＥＰＡＬＥＯＧＥＮＥＳＹＳＴＥＭＩＮＴＨＥＬＩＡＯＤＯＮＧＢＡＹ￥ＺｈａｏＣｈｅｎｇｌｉｎ；ＬｉｕＭｅｎｇｈｕｉａｎｄＹａｎｇＣｏｎｇｘ...

ＭＩＣＲＯ－ＳＥＤＩＭＥＮＴＡＲＹＦＡＣＩＥＳＡＮＤＤＩＡＧＥＮＥＳＩＳＯＦＴＨＥＰＡＬＥＯＧＥＮＥＳＹＳＴＥＭＩＮＴＨＥＬＩＡＯＤＯＮＧＢＡＹ￥ＺｈａｏＣｈｅｎｇｌｉｎ；ＬｉｕＭｅｎｇｈｕｉａｎｄＹａｎｇＣｏｎｇｘｉａｏ（ＧｅｏｓｃｉｅｎｃｅＤｅｐ...

关键词：

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

徐家围子断陷构造样式与深层天然气聚集

新疆石油地质 2004年第3期25卷 254-258页

作者：刘学锋孟令奎长江大学地球科学系湖北荆州434023 武汉大学遥感信息工程学院湖北武汉430079

以***的构造样式(structuralstyles)分类方案为基础,对研究区构造样式作了详细分类研究,探讨了不同构造样式中可能出现的天然气圈闭类型。根据基底是否卷入,将构造样式分为基底卷入型和盖层滑脱型两大类,并进一步根据不同的应力环境、... 详细信息

以***的构造样式(structuralstyles)分类方案为基础,对研究区构造样式作了详细分类研究,探讨了不同构造样式中可能出现的天然气圈闭类型。根据基底是否卷入,将构造样式分为基底卷入型和盖层滑脱型两大类,并进一步根据不同的应力环境、不同的构造组合形式划分出9种基本构造样式。构造样式的发育主要受断陷期近南北向压扭应力场的控制,晚期北西-南东向挤压应力场只起次要控制作用。每一种构造样式对深层天然气聚集都有不同程度的控制作用,其中,低角度控陷边界正断层控制的箕状断凹与断垒组合、同沉积型挤压背斜、逆冲褶皱组合、断弯背斜及其上覆同沉积背斜组合等样式中发育的背斜、断背斜型圈闭,最有利于松辽盆地北部徐家围子地区天然气的聚集。

关键词：构造样式天然气聚集基底卷入型盖层滑脱型应力环境

BOUNDARY VALUE PROBLEM TO DYNAMIC EQUATION ON TIME SCALE

在线全文

学校读者我要写书评

暂无评论

Annals of Differential Equations 2011年第3期27卷 367-371页

作者： Jinying Song,Fengjie Geng (School of Information Engineering,China university of geoscience,Beijing 100083)

In this paper we consider a nonlinear first-order boundary value problem on a time scale. The existence results of three positive solutions are obtained using fixed point theorems. Finally,examples are presented to il... 详细信息

关键词： time scale boundary value problem fixed point completely continuous operator

Estimating forest aboveground biomass using HJ-1 Satellite CCD and ICESat GLAS waveform data

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2010年第S1期53卷 16-25页

作者： GUO ZhiFeng1,CHI Hong1,2.& SUN GuoQing1,3 1State Key Laboratory of Remote Sensing Science,Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal university,Institute of Remote Sensing Applications,Chinese Academy of Sciences,Beijing 100101,China 2.raduate university of Chinese Academy of Sciences,Beijing 100049,China 3Department of Geography university of Maryland,College Park,MD 2.742.USA State Key Laboratory of Remote Sensing Science Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal University Institute of Remote Sensing Applications Chinese Academy of Sciences Beijing China Graduate university of Chinese Academy of Sciences Beijing China Department of Geography university of Maryland College Park USA

The ecosystem in northeastern China and the Russian Far East is a hotspot of scientific research into the global carbon *** aboveground biomass(AGB) is an important component in the land surface carbon *** this study,using forest inventory data and forest distribution data,the AGB was estimated for forest in Daxinganlin in northeastern China by combining charge-coupled device(CCD) data from the Small Satellite for Disaster and Environment Monitoring and Forecast(HJ-1) and geoscience Laser Altimeter System(GLAS) waveform data from the Ice,Cloud and land Elevation Satellite(ICESat).The forest AGB prediction models were separately developed for different forest types in the research area at GLAS footprint level from GLAS waveform parameters and field survey plot biomass in the Changqing(CQ) Forest center,which was calculated from forest inventory *** resulted statistical regression models have a R2.0.68 for conifer and R2.0.71 for broadleaf *** models were used to estimate biomass for all GLAS footprints of forest located in the study *** GLAS footprint biomass coupled with various spectral reflectivity parameters and vegetation indices derived from HJ-1 satellite CCD data were used in multiple regression analyses to establish biomass prediction models(R2.0.55 and R2.0.52.for needle and broadleaf respectively).Then the models were used to produce a forest AGB map for the whole study area using the HJ-1 *** data obtained from forest inventory data of the Zhuanglin(ZL) Forest center were used as independent field measurements to validate the AGB estimated from HJ-1 CCD data(R2.0.71).About 80% of biomass samples had an error less than 2. t ha-1,and the mean error of all validation samples is 5.74 t *** pixel-level biomass map was then stratified into different biomass levels to illustrate the AGB spatial distribution pattern in this *** was found that HJ-1 wide-swath data and GLAS waveform data can be combined to estim

关键词： Disaster and Environment Monitoring and Forecast Satellite ICESat GLAS waveform boreal forest forest aboveground biomass multiple linear regression

在线全文

学校读者我要写书评

暂无评论

煤系岩石产酸潜力的索氏淋滤实验评价

中国矿业大学学报 2013年第2期42卷 214-220页

作者：赵峰华孙红福刘乃利中国矿业大学(北京)地球科学与测绘工程学院北京100083 中国矿业大学(北京)煤炭资源与安全开采国家重点实验室北京100083

为了准确评价非均质性较强含煤岩系样品的产酸潜力,采用索氏淋滤实验方法对山西省西山煤田石炭二叠纪含煤岩系岩石样品的产酸潜力进行了评价,建立了煤系岩石产酸潜力的索氏淋滤实验评价方法.结果表明:1)淋出液pH值小于7、(Ca+Mg+Mn)/SO... 详细信息

为了准确评价非均质性较强含煤岩系样品的产酸潜力,采用索氏淋滤实验方法对山西省西山煤田石炭二叠纪含煤岩系岩石样品的产酸潜力进行了评价,建立了煤系岩石产酸潜力的索氏淋滤实验评价方法.结果表明:1)淋出液pH值小于7、(Ca+Mg+Mn)/SO2.-累积摩尔比小于1的样品被评价为产酸样品,反之被评价为不产酸样品.据此将西山煤田的泥岩、砂岩和菱铁矿等3个样品评价为不产酸样品(淋出液pH>8,(Ca+Mg+Mn)/SO2.-累积摩尔比1.99～2.91),2.非均质黄铁矿样品评价为强产酸样品(淋出液pH2.-累积摩尔比0.08～0.58);2.基于淋出液SO2.-浓度计算的2.非均质黄铁矿样品产酸速率分别为177.1mM[SO2.-]/(kg.d)和2.1.8mM[SO2.-]/(kg.d);基于淋出液(Ca+Mg+Mn)浓度计算的砂岩、泥岩和非均质菱铁矿样品酸中和速率为10.73～68.77mM[Ca+Mg+Mn]/(kg.d);3)产酸样品淋出液中SO2.-离子累积质量浓度为507～1 681mg/L,Fe离子累积质量浓度为135～753mg/L;不产酸样品淋出液中SO2.-离子累积质量浓度小于140mg/L,Fe离子累积质量浓度小于1.2.g/L;4)不产酸样品淋出液的S/Fe摩尔比大于66,2.产酸非均质黄铁矿样品淋出液的S/Fe摩尔比为0.95～3.2.5)样品淋滤过程中产生了赤铁矿、石膏和硬石膏等次生矿物相.

关键词：索氏淋滤实验产酸速率酸中和速率含煤岩系

豫西荥巩-新密煤田上石炭统太原组牙形石的发现

在线全文

学校读者我要写书评

暂无评论

石油与天然气地质 1990年第2期11卷 209-213,T001页

作者：张年茂中国地质大学

本文在初步研究了荥巩-新密煤田太原组牙形石特征后,建立了该区唯一的牙形石组合:Streptog-nathodus ***。与华北标准剖面太原西山太原组的牙形石对比,本区太原组为晚石炭世中、晚期的沉积。

关键词：牙形石上石炭统煤田地层