排序方式： 共有122条查询结果，搜索用时 46 毫秒
51.
WANG XianBin GUO ZhanQian TUO JinCai GUO HongYan LI ZhenXi ZHUO ShengGuang JIANG HongLiang ZENG LongWei ZHANG MingJie WANG LianSheng LIU ChunXue YAN Hong LI LiWu ZHOU XiaoFeng WANG YongLi YANG Hui & WANG Guang Key Laboratory of Gas Geochemistry Chinese Academy of Sciences Lanzhou China Daqing Oilfield Company Ltd. Daqing 《中国科学D辑(英文版)》2009,52(2):213-226
This paper discusses the kinetic fractionation, composition and distribution characteristics of carbon and hydrogen isotopes for various alkane gases formed in different environments, by different mecha- nisms and from different sources in nature. It is demonstrated that the biodegradation or thermode- gradation of complex high-molecule sedimentary organic material can form microbial gas or thermogenic gas. The δ 13C1 value ranges from -110‰ to -50‰ for microbial gases but from -50‰ to -35‰ (even heavier) f... 相似文献
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QIAN FuYe ZHAO BiRu QIAN Wei ZHAO Jian HE ShiGen ZHANG HongKui LI ShiYu LI ShaoKun YAN GuLiang WANG ChengMin SUN ZhenKai ZHANG DongNing LU Jun ZHANG Ping YANG GuoJun SUN JiaLin GUO ChunSheng TANG YuXiong XU JianMing XIA KunTao JU Hang YIN BangHong LI Ming YANG DongSheng QI WeiLuo HE TaiMing GUAN HuaPing & ZHAO YuLin Institute of Geophysics China Earthquake Administration Beijing China Tianjin Hi-tech Development Co. Ltd Tianjin ... 《中国科学D辑(英文版)》2009,(10)
We deployed four geo-electric monitoring stations in Sichuan and Yunnan provinces from 2004, using the new generation of equipment (PS-100) and technologies to capture the HRT wave earthquake precursor. Before the Wenchuan Ms8.0 earthquake, we recorded the HRT wave precursor at the only operating station in Hongge (HG, Δ=465 km) and found that significant impending signal had been recorded at the station in the early morning ( 0―5 am) of 12th of May, 2008. The precursor for this earthquake is consistent wit... 相似文献
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活化处理中坡缕石结构变化与性能关系的研究 总被引：7，自引：0，他引：7
以活化坡缕石作为吸附剂的应用已经十分广泛,活化方法一般有酸活化和焙烧活化,本文用X射线衍射和红外光谱分析,研究了纤维状坡缕石和土状坡缕石经HCl活化和焙烧活化后晶体结构的变化,结果表明,HCl活化对纤维状坡缕石结构没有影响,而土状坡缕石则不然,当HCl浓度为1.0mol/L时,呈人面体配位的阳离子部分坡H^-取代或溶出,导致晶胞参数减小,当HCl浓度为1.5mol/L时,出现人面体片坍塌,游离出SiO2,结构出现较大破坏,对进一步提高活性没有贡献,在350℃及以上温度焙烧活化会使坡缕石晶体结构产生明显破坏,分解氧化形成的Fe2O3使其脱色率明显下降。 相似文献
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A series of regular and irregular wave experiments are conducted to study the reflective and transmitting performances of quarter circular breakwater (QCB) in comparison with those of semi-circular breakwater (SCB). Based on regular wave tests, the reflection and transmission characteristics of QCB are analyzed and a few influencing factors are investigated. Then, the wave energy dissipation as wave passing over the breakwater is discussed based on the hydraulic coefficients of QCB and SCB. In irregular wav... 相似文献
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The assembly coastal hfilding technique initiated at home and abroad,is for a novel vertical standing harbor structure.Its main concept is the assembling components which can be combined and locked together to form a large caisson.Its application and future are discussed for a building.After many years of application and tests,the technique has a high stability,a wide range of application,low workload and fast construction speed.It can be widely applied in future for harbor engineering projects. 相似文献
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LIU Jianying LIU Li QU Xiyu .Exploration & Development Research Institute of Daqing Oilfield Company Ltd. Daqing Heilongjiang China .College of Earth Sciences Jilin University Changchun China 《东北亚地学研究》2009,12(1):1-4
Clay minerals in the outcropped sandstone from Lower Cretaceous Chengzihe Formation and Muling Formation in Jixi Basin were analyzed by X-ray diffraction. The results show that the clay minerals mainly consist of illite, kaollinite and illite/smectite, which can be divided into two types： kaolinite- and illite/smectite types. The outcropped sandstone occurred in middle diagenetic stage-A on the basis of the clay mineral composition. The development factor of the formation of kaolinite type clay mineral is caused mainly by the organic acid from the coal-bearing formation and nmdstone during the diagenesis process in Lower Cretaceous Chengzihe Formation and Muling Formation in the Jixi Basin. The weak hydrodynamic force of sedimentary facies made the sandstone leaching condition poor, which is the reason forming the aggregation of clay minerals of the illite/ smectite-and illite types. 相似文献
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泥石流危险度的划分是泥石流研究中的重点与难点,泥石流危险度的确定对于泥石流整体特征的把握具有十分重要的作用。采用熵值-理想点法建立了泥石流危险度划分模型,选取流域面积、主沟长度与泥石流沟相对最大高差等10个评价指标。利用现场3条泥石流沟作为工程评价对象,通过熵值法确定各评价指标的权重系数,并采用理想点法进行泥石流危险度的划分研究。根据模型分析结果,泥石流沟2与3属于高危险度(贴近度为0.79与0.83),泥石流沟1属于中危险度(贴近度为0.82)。泥石流危险度与现场情况及已有研究资料基本一致,证明了该法在泥石流危险度划分中的合理性与有效性。 相似文献
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ΔlgR测井源岩评价方法的改进及其在松辽盆地的应用 总被引：3，自引：0，他引：3
通过引进新的测井源岩评价技术△lgR基线表达式(记为△lgR'基线),实现△lgR测井源岩分析的全自动化.测井源岩评价技术应用于松辽盆地青山口组源岩的研究表明:△lgR'基线在青山口组差异小,均值约为2.4,与青山口组时期稳定的湖相沉积环境是相符的;总有机碳质量分数(ω(TOC))与△lgR的关系系数α并非严格对应的关... 相似文献
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112201工作面是梅花井煤矿首采工作面,位于矿井南端浅部,切眼靠近鸳鸯湖背斜轴部。工作面涌水量从2009年4月份开始回采时的15m3/h,增至2010年3月份的230m3/h。工作面的突然涌水导致大量淋水,从而使采区底板严重泥化,给矿井安全生产带来巨大威胁。分析认为,工作面的主要充水水源为2-1煤的顶板含水层（七里镇砂岩）,主要通道为顶板的采动裂隙带。通过实施探放水和疏放水工程,工作面下隅角的涌水量由180m3/h降至30m3/h以内,极大的减少了含水层突然涌水对工作面的危害,为梅花井乃至鸳鸯湖矿区防治水工作起到了积极作用。 相似文献