正压冲固海洋平台的地震分析

对正压冲固平台这一新型的浅海海洋平台进行地震计算。将正压冲固基础简化为动刚度一阻尼系统,采用振型叠加和响应谱分析法,并根据《海上固定平台入级与建造规范(1992)》,计算了结构的最大可能位移响应;同时计算了延长六倍桩径后底端固支的模型。计算结果表明,后者由于没有考虑基础的刚度和阻尼特性,偏于保守。     

关于“录井软件平台”的探讨

该文提出了录井平台的概念,比较了录井平台与以往国内录井软件的不同之处,阐述了录井平台的特点及优势,同时,提出了录井平台的结构及基本设计思想,说明了录井平台的发展前景。     

福州湾边特大桥3号墩双壁钢围堰施工

介绍福州湾边特大桥3号墩无覆盖层裸露岩石钻孔桩施工和大体积水中承台施工,为类似水上工程的施工提供一定的参考价值。     

Determination of stress fields in the elastic lithosphere by methods based on stress orientations

Theoretical reconstruction of the stress fields in tectonic plates or particular tectonic regions is an important geophysical problem. Conventional approaches for solving this vital issue are based on classical formulations of boundary value problems of elasticity. In these approaches, stress fields are calculated for diverse boundary conditions defined on the margins of the region in order to fit the experimentally observed orientations of principal stresses inside the region.The present article identifies the major flaw in the conventional approach, which is the impossibility of obtaining a unique and reliable stress field, and suggests alternative methods based on the analysis of orientations of principal stresses. Three methods for determining the elastic state of stress in relatively stable blocks of the lithosphere are described and applied to particular tectonic domains. All of the methods are based on the direct use of experimental data on the stress orientations as input information. The first method exploits direct integration of the equations of elasticity when the field of principal stress trajectories is prescribed within a region. The second one utilizes the non-classical boundary value problem of elasticity, which uses experimentally obtained stress orientations at the region margins as boundary conditions. The third method is aimed at the numerical determination of the stress field from a given set of spatially discrete principal stress orientations.In contrast to the conventional approach, the methods suggested here do not require knowledge of the boundary stress magnitudes. As a consequence, the general solution of the problem becomes non-unique. However, in the case of an elastic medium, only a certain (finite) number of arbitrary parameters control the general solutions. These parameters can be determined from in situ stress measurements within the region under study. Therefore, for the selected spatial scale, the unique stress field can be singled out. In the second method, the number of parameters (and, thus, the minimum number of field measurements) is determined from an analysis of boundary stress orientations alone. In other methods, this number depends upon the harmonicity or non-harmonicity of inclination of the prescribed stress trajectories (for the second method) and the calculated stress trajectories (for the third method).To illustrate the essence of the proposed methods, they are applied to the determination of first-order stress fields in the West European and Australian platforms. These platforms represent two basically different types of stress domains. The stress field for the West European platform reflects nearly homogeneous stress orientations throughout the extent of the region, whereas the Australian platform is characterized by rotation of the principal stress axes while traversing the region margins. In the case of Australia, an important result is the existence (at the chosen spatial scale) of a singular point inside the Australian continent at which the curvature of the stress trajectories is infinite. The local state of stress near such a point has important geophysical and engineering implications.The proposed approaches can be applied not only for the determination of regional stress fields but also at other spatial scales, depending on the scale at which the stress indicators have been characterized.     

Product Platform Identification and Development for Mass Customization

This paper is mainly concerned with the Identification of an embryonic product platform from a family of products whose composition, configuration and characteristics are represented by Attributed Graphs. The problem becomes that of identifying the largest isomorphic sub-graph with the highest similarity. An algorithm is proposed for solving this problem together with several novel concepts.     

基于J2EE标准和Weblogic Platform的网络拍卖系统架构研究

在介绍J2EE技术标准和BEA Weblogic平台基础上,描述了一个多用户企业级的电子商务解决方案,讨论了如何用基于Java组件实现安全、健壮、可移植的Web应用.     

广州电力"十一五"传输网规划方案的探讨

电力传输网的建设是广州电力“十一五”通信规划的重点和难点,文章介绍了广州电力传输网的现状,分析了现有网络存在的主要问题,研究网络承载的业务,并综合电力实际的业务需求和未来发展,充分利用现有光缆资源,提出了“十一五”期间广州电力传输网的完善方案和新建设的传输网的规划方案,以及实际建设中应注意的问题,为电力传输网的构建与实施提供了依据。     

南黄海古生代以来构造演化

南黄海是奠基于下扬子地台前震旦纪变质岩基底之上一个多旋回盆地的叠覆,在成生发展及其后过程中经历了多期构造改造作用,盆地原型已不存在,形成现今复杂的地质构造面貌。根据国土资源新一轮大调查项目在南黄海获取的高品质的地球物理资料,结合钻井和相邻陆地的资料以及不同时期动力体系的作用、不同期次构造运动和变形的特点,将南黄海大致划分为4个大的构造演化阶段:古生代—三叠纪海相盆地稳定演化阶段、中生代陆相盆地演化阶段、古新世—中中新世断陷盆地发育阶段和晚中新世以来区域沉降阶段。加里东运动使华南褶皱带与扬子地台南缘拼贴,形成广阔而稳定的后加里东地台;印支—早燕山运动使下扬子地台与华北地台的东南缘碰撞和挤压,形成了苏鲁造山带,在造山带南侧和中部隆起区之间形成黄北前陆盆地,中部隆起区以南为黄南断陷盆地。      

MSTP体系结构研究

随着IP数据、话音和图像等多种业务传输需求的不断提高,现有以承载话音为主要业务的城域网在容量以及接口能力上都已经无法满足业务传输与汇聚的要求。以SDH为基础的多业务传输平台能够克服传统城域网的缺点,可以更有效地支持分组数据业务,并有助于实现从电路交换网向分组网的过度。介绍了MSTP的分类方法,给出了MSTP的分层结构,并对各功能模块的需求和特点进行了详细分析。     

高温五参数吸汽剖面精细化测试技术

文章所介绍的高温五参数吸汽剖面精细化测试技术是在多年高温仪器研制基础上，攻克了高温存储仪器井下一次精确校深、高温大容量存储及连续测量、扶正式高温高精度流量测试等技术难关。配套开发了摆脱传统试井模式的具有二次开发功能、可挂接不同测井仪器和解释方法的开放式高温测井平台和资料解释平台软件，形成了高温五参教吸汽剖面精细化测试技术。现场测试证明，该技术可以有效地获得稠油注汽热采井的温度、压力、流量参数，并同时测得伽马和接箍信号，实现了吸汽剖面的精细测量。