网络教学综合实验平台建构设计与实现

论文主要介绍网络教学综合实验平台建构设计与实现方法。同时,讨论了网络教育综合平台的逻辑拓扑结构,所选择的网络产品,并介绍了在教学环境中如何使用这个平台。     

天津市邮政综合服务平台建设

结合中国邮政综合服务平台的建设现状，从综合服务平台的建设原则、方案思路、配套解决方案等几个方面分析和探讨了天津市邮政综合服务平台建设中的一些技术问题。     

基于XML的ISSP结构研究

提出了基于XML技术的ISSP结构。充分讨论了ISSP中的组件管理以及采用XML技术在各个组件间传递信息的方法。     

面向未来的新一代MSTP-NetRing

新业务的开展可以为运营商带来潜在的丰厚利润,在以电路交换为主的电话网络向以分组交换为主的综合网络演变的趋势下,MSTP产品在实现强大的多业务传输能力的同时,更提高了设备集成度,具有良好的性能价格比,能为传输网络建设的不同层面提供完整的解决方案。文章详细介绍了UT斯达康新一代的MSTP产品—NetR ing系列。     

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.     

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.     

中小型渔船制冷技术的研究进展

远洋渔船带有制冷装置，而100吨以下的中小型渔船因其柴油机的限制，无法安装压缩机式制冷机。出海作业时，均需携带冰块做渔产保鲜。本文介绍压缩式渔船制冷的现状，回收渔船尾气余热的吸收式制冷系统，吸附制冷的冷冻水系统，吸附式制冰系统等实验装置。其中吸附式制冷系统具有良好的开发价值。     

基于线上线下混合式大班翻转的单片机教学改革

在电子行业迅速发展的背景下,单片机课程对学生的作用越来越重要,然而学生对单片机课程不容易学会并且没兴趣学,把自己当做观众不全力学,导致学生掌握的课程内容跟不上时代发展的步伐。提出了线上线下混合式大班翻转的教学改革思路,将线上自主学习和线下翻转教学相结合,学生通过网络平台自主学习基本理论;知识延伸部分以翻转课堂的形式在多媒体教室进行。使学生有针对性的学习,提高了学习单片机知识的积极性,通过师生取得的成果证明了该教学改革取得了一定的效果。