中国东部夏季降水特征及其与西太平洋副高的关系

利用中国东部160个气象观测站1951年-2012年夏季（6-8月）的月平均降水资料,运用EOF分析方法,分析中国东部夏季降水的时空分布特征及其与西太平洋副热带高压的关系。结果表明:（1)夏季,中国东部降水大值区域从华南移到江淮流域,然后到达华北和东北地区。（2) 中国东部夏季降水EOF第一模态空间分布为长江以北与黄河以南地区之间存在一个降水大值雨带, EOF第二模态显示出整个东部沿海地区的降水量以长江为界,长江以南降水偏少,长江以北降水偏多,且江南与江北的降水呈反位相。（3)在西太平洋副热带高压较强的年份,江淮流域降水偏少,华北地区降水偏多;西太平洋副热带高压较弱的年份,江淮流域降水偏多,华南地区降水偏少。     

海沧大桥140m连续刚构桥施工悬臂平面变形监测方法与精度分析

本文介绍了大跨度连续刚构桥悬臂箱梁平面变形监测的必要性及其方法，精度分析和监测结果表明，该方法对同类桥梁型施工中的变形监测具有参考价值。     

大型遥感图像处理系统中集成数据库设计及应用

大型遥感图像处理应用系统中，往往需要实时获取各种背景或专题数据，该过程即是数据动态集成过程。集成数据库是建立在各种专题数据基础上的数据集成使用框架体系，该文描述了集成数据库的结构及各类子库的组成，根据项目的特殊需求提出了虚拟数据库概念，并结合实例说明了集成数据库以元数据为链条的使用机制与方法。     

西北地下水资源数据库及其网上发布

西北地下水资源数据库包括地下水资源属性数据库和地下水资源空间数据库，属性数据库采用AC－CESS97存储格式，空间数据库采用ARCVIEW3．1存储格式，文中介绍了西北地下水资源数据库的基本内容，组织结构及其元数据，阐述了其在网上发布的动态网页设计思路及基于WEB GIS的数据浏览，查询的设计思路。     

A model to assess fundamental and realized carrying capacities of island ecosystem: A case study in the southern Miaodao Archipelago of China

Research on carrying capacity, aiming at maintaining the limited ability of the Earth's life supporting system to sustain human development, requires a comprehensive and ecosystem-based approach to monitor and assess the localized sustainability of coupled social and ecological systems. A definition termed the ecosystem-based carrying capacity of island (EBCCI) was developed in this paper of which the indices of fundamental and realized carrying capacities of island (FCCI and RCCI) were highlighted to emphasize the inter-dependencies between social systems and ecological systems. In order to avoid the difficulties and uncertainties of direct assessment, the related assessment model was established on the basis of synthetic evaluation of inherent and external factors affecting the EBCCI. The southern Miaodao Archipelago (SMA) located in the intersection of the Bohai Sea and the Yellow Sea, China, was taken as a typical example to acquire integrated recognition of the island ecosystem and its carrying capacity so as to discuss its sustainable development. The index scores of FCCI and RCCI in the SMA were 0.818 5 and 0.712 9 out of 1.0, respectively, with acceptable uncertainties. The results showed a relatively well capacity to sustain progress and relatively well realization of the carrying capacity of island ecosystem, owing to a well capacity of ecologically regulating, general performance of both ecologically supporting and resource provisioning, and a relatively high level of social supporting system. The study implied that it was critical to optimize the inter-dependencies and to sustain the relative balance between social systems and ecological systems so as to improve the RCCI and further facilitate the sustainability of SMA. The approach proposed in this paper provides a powerful tool which is well applicative to the regional level of an oceanic island or archipelago to study the sustainable development and can be further popularized to the coastal zone.     

基于稀疏浮动车数据的城市路网交通流速度估计

浮动车数据在时空维度呈现较强的稀疏性,是其应用于城市路网交通流估计所面临的主要难题之一。本文通过分析路网交通流速度的时空特征,构建了一种基于朴素贝叶斯法的估计模型,实现对路网中未被样本覆盖路段交通流速度的估计。时间特征主要考虑目标路段相邻时段的交通流速度,空间特征根据路段间交通流相似关系进行分析,突破了传统基于欧氏空间或拓扑关系的度量方式。结果显示,模型能有效地估计出样本缺失路段的交通流速度,且在精度方面相对传统基于拓扑关系的算法优势显著,较好地解决了数据时空稀疏性问题,对基于浮动车数据的交通应用具有较强的实践意义。     

ON THE EXISTENCE OF THE SHUANGTSüAN SERIES AND ITS TRIASSIC FLORA IN HSISHAN OR THE WESTERN HILLS OF PEIPING

During the summer of 1932,Y.S.Chi made a detailed study of thegeology of the Mentoukou (门头溝) and Sanchiatien (三家店) area of Hsishan,or the Sanchiatien Sheet~2 of the Ordnance Map in the scale 1 to 25,000.The     

ON THE EXISTENCE OF THE SHUANGTSüAN SERIES AND ITS TRIASSIC FLORA IN HSISHAN OR THE WESTERN HILLS OF PEIPING

During the summer of 1932,Y.S.Chi made a detailed study of thegeology of the Mentoukou (门头溝) and Sanchiatien (三家店) area of Hsishan,or the Sanchiatien Sheet~2 of the Ordnance Map in the scale 1 to 25,000.The     

THE COAL FIELD OF MENTOUKOU,WEST OF PEIPING

The Western Hills of Peking are,since very remote times,well knownfor coal production and Mentoukou is one of the most productive districts amongthese hills.On account of its economic importance it was visited by several