( 2 ) a simple calculation method for the soft soil two - layer deep excavation dewatering is put forward . furthermore , the author analyses the regularities of the ground sedimentation , which was caused by deep excavation , with the combination of a practical construction project (二)提出了软土地区二元结构地层深基坑降水引起地面沉降的简化计算方法，结合工程实例分析了深基坑降水引起地面沉降的平面分布特点及其规律性。
The integrated identification of fractures with the bpo interpretation of logs and the 3d seismic fracture interpretation technology were used to predict the development and distribution rules of fractures in ve rtical and plane directions of mesozoic reservoirs of baigezhuang region . the plane distribution of the stress fields of different major oil reservoirs determined with finite element numerical simulation provides a theoretical foundation for the research of the plane distribution of the fracture . thus , the quantitative prediction of the tectonic fractures is possible 本文应用测井参数的bp神经网络裂缝综合识别方法、三维地震裂缝检测技术，预测了柏各庄地区中生界储层平面或纵向上裂缝的发育分布及规律；并用有限元法数值模拟技术展示出不同主力油层的平面古应力状态，为研究裂缝的平面分布规律提供了理论依据；在此基础上，依据岩石破裂准则进行了构造裂缝定量预测。
The studies of in - layer heterogeneity are as follows : the text depicts the characteristics of heterogeneity by calculating the coefficient of variability , kmax / k and k . max / k . min of sand layers of different sedimentous microfacies ; divides interlayer into two types , and counts their numbers , thickness , frequency and density of a single sand layer according to the characteristics of lithology and logging , finally summarizes the characteristics of interlayer distributing ; sets up five in - layer heterogeneity models and points out that the primary models are model a and c . the studies of between - layer heterogeneity are as follows : the text depicts sand layers " growth and distributing conditions by calculating the lamination factor , sandstone density and overlap coefficient ; makes certain the lithology and thickness of interlayer by the method of contrasting the typical curves 层内非均质性研究，通过计算不同沉积微相砂体渗透率的变异系数、突进系数以及级差来说明主要储集微相的非均质特征；据岩性及电性特征，将层内夹层分为两类，统计单砂层段内夹层的个数、累积夹层厚度、夹层频率及夹层密度，并且根据夹层频率及密度平面分布图统计出每层的频率相对高值区和低值区，总结夹层分布特征；根据物性参数随深度的变化趋势建立了五种储层层内物性非均质模式，指出研究区内以a型和c型模式为主。
Species , the diversity index ( h " ) and evenness ( j ) of phytoplankton community increased gradually from inside of the bay to outside of the bay , and was greater in the outer bay than that in the inner bay . the density of total cell number increased from inside of the bay to outside of the bay , and was greater in outer and eastern bay than these in inner and western bay 调查海区浮游植物群落的种类数、多样性指数与均匀度都表现为湾外多于湾内，湾内外侧高于湾内内侧的趋势，而总细胞数的平面分布呈现湾外高于湾内、湾内外侧高于内侧、东部高于西部的基本格局。
On the one hand , the processed gpt profiles can be used to delineate the underground artificial concrete base of building fields and provides important data for the plan of groundsill processing and location of pipe piles ; on the other hand , they can not only display the boundaries of the civil air defense accurately , but also reflect its internal structural characters 对探地雷达剖面的处理分析，圈定了测区内多块建筑场地地下混凝土结构的平面分布范围，为建设工程的地基处理设计和桩基施工定位提供重要资料；探地雷达剖面不仅能精确显示人防工程的平面边界位置，而且还能反映人防工程的内部结构特点。
Based on the synchronic seqence stratigraphic framework , through comprehensive investigation of the evaluation of seqence , the type of sedimentary facies and sedimentary system with it ' s area distribution , the domination of paleogeographic structure to paleocurrent and sedimentary system , draw a conclusion : the boundaries of the thickness of sequence was bounded by the boundary faults . the irregularity of sedimentary facies was dominated by base level rise to fall and accommodation 在建立等时层序地层格架的基础上，分析了层序的充填演化规律、沉积相和沉积体系的类型及其平面分布特征、古构造对古水流和沉积体系分布的影响，得出以下认识：层序发育的厚度受边界断层控制，层序内部沉积相的变化规律受基准面和可容纳空间的控制。
Based on the analysis of sedimentary facies in individual wells and the correlation of three cross sections of sedimentary facies , it is elaborated that sedimentary facies of jianglingjiang formation are vertically and laterally developed within qianwei area . by the method of single - factor analysis , it is pointed out facies distribution of four key formations after thorough study of four geologic factors that could embody sedimentary environment and facies , that is the thickness of formation , grainstone and dolostone , and lithofacies . with the above results , combining with reservoir and structural features , of which the emphasis is the reservoir characteristics of different rock and microfacies types , it is pointed out favorable reservoir zones , by the method of multi - factors superposition 采用单因素分析法，选取并研究地层厚度、颗粒岩厚度、白云岩厚度和区域岩相等四种能反映沉积环境和沉积相的地质因素，指出了四个重点层段的沉积相平面分布特征；根据沉积相的研究成果，结合储层特征和构造发育特征，着重讨论了不同岩石类型和微相类型的储集特征，采用多因素叠合法对犍为地区嘉陵江组有利储集相带进行了预测，指出了有利储集相带的分布。
But due to the difficulties of the theoretical calculation and the limitation of the technique of image display , only some two - dimensional graphs of electromagnetic field of a planar set of point charges or symmetrically and uniformly charged bodies , which ignores the boundary effect , are introduced in the present electromagnetics teaching materials , which brings much incovenience for the acquaintance of the electrostatic field 然而,由于受理论计算和图象显示技术等因素的限制,目前的电磁学教材中,通常只能给出平面分布的点电荷系或具有较强对称性、忽略边界效应的带电体的电力线和等势线的二维平面图,这给静电场分布的感性认识带来了一定不便。
Through the analysis of petrology characteristics and individual well section of sedimentary facies of five core holes , direction of sedimentary source area , the depositional framework and main facies types and its features of penglaizhen formation , baimamiao - songhua area are elaborated on the basis of sedimentary backgroud of region . from this above , in view of the study of the correlation of 3 cross sections of sedimentary facies , it is pointed out that distribution regularities of sedimentary facies and possible places of distribution of sand bodies of iii , iv member of penglaizhen formation are vertically and laterally developed in baimamiao - songhua area . by the analysis and contrast of seven plans of sedimentary facies and nine isopach maps of sandstone , the planar characteristics of distribution of sedimentary facies are summarized , meanwile , macroscopic distribution regularities of sand bodies is studied in iii , iv member , penglaizhen formation of baimamiao - songhua area 通过5口取心井的岩石学特征、单井剖面相分析，结合区域沉积背景，阐述了研究区蓬莱镇组的物源方向、沉积格局、主要沉积相类型及其特征；在此基础上，通过3条连井剖面的沉积相对比研究，揭示了研究区蓬段、蓬段纵向与横向上沉积相的分布规律及砂体的大体分布位置；通过7张沉积相平面图、 9张砂岩等厚图的分析对比，总结了蓬段、蓬段沉积相的平面分布特征，宏观上研究了蓬段、蓬段的砂体展布规律。
It has been proven that the differences of magnitude and distribution of tidal currents , wave energy rate , suspended sediment concentration and the stokes number result in a asymmetrical distribution of sandbanks between the north and south . the sandbank surface area and length in the north are lager than those in the south , but its cross section area is less than that in the north 各种动力特征平面分布规律研究表明，辐射沙脊群南北沙脊不对称分布的格局是潮流沙脊对潮流往复流性质的强弱分布、潮波能流率大小分布、含沙量的平面分布规律及斯托克斯数的大小分布的动力响应。
