Integrating Spatial Data Linkage and Analysis Services in a Geoportal for China Urban Research

Many geoportals are now evolving into online analytical environments, where large amounts of data and various analysis methods are integrated. These spatiotemporal data are often distributed in different databases and exist in heterogeneous forms, even when they refer to the same geospatial entities. Besides, existing open standards lack sufficient expression of the attribute semantics. Client applications or other services thus have to deal with unrelated preprocessing tasks, such as data transformation and attribute annotation, leading to potential inconsistencies. Furthermore, to build informative interfaces that guide users to quickly understand the analysis methods, an analysis service needs to explicitly model the method parameters, which are often interrelated and have rich auxiliary information. This work presents the design of the spatial data linkage and analysis services in a geoportal for China urban research. The spatial data linkage service aggregates multisource heterogeneous data into linked layers with flexible attribute mapping, providing client applications and services with a unified access as if querying a big table. The spatial analysis service incorporates parameter hierarchy and grouping by extending the standard WPS service, and data‐dependent validation in computation components. This platform can help researchers efficiently explore and analyze spatiotemporal data online.     

Study on biological oceanography characteristics of planktonic copepods in waters north of Taiwan Ⅰ.Abundance distribution

I~IOXWith regard tO the 5,tudy on the planktonic copeal distributions in the Kuroshio waters ofthe East China Sea and its adjacent areas, a great ~nt of reSearch work has been made by somescholars at home (He and Yang, 1990; Meng et al., 1990; He, 1990; Liu et al., 1991; He etal., 1992; He et al., 1994). HOwever, the most of them were made in a single season, and it isabet about in the research of the various aspects of species comPOSition, abundance distributionand ecological characte…     

异地性介形虫堆积速率与古气候变化的相关性——以南海17940-2柱状样为例

17940－2柱状样采自南海北部陆坡、东洋群岛东南水深1727m处，柱长1330cm。通过分析该柱4万年以来的介形虫化石群落，发现异地性浅水分子的堆积速率在末次冰期和气候转变期时明显呈现高值，而在相邻的两个转变期之间则偏低，尤其在冰后期气候平趋的整个全新世，异地性分子的堆积速率降到最低。这一变化与该孔中有机碳通量的变化趋势相一致，但与原地性介形虫堆积速率的变化截然不同。以上结果说明在古气候变化时期该海域陆坡表层沉积物的顺坡搬运作用明显增强，推测是因海平面变动激发所在站位上方浊流所至。本研究结果说明，异地性介形虫的堆积速率可能成为古气候变化的敏感信号。     

60Co-γ射线辐照坛紫菜叶状体及单克隆培养的研究

本文报道了坛紫菜叶状体经60Coγ射线辐照后,用酶解方法获得离体细胞,观察了体细胞的分裂分化及进行单克隆培养叶状体.结果显示:体细胞发育和分化的趋势分为正常叶状体、畸形叶状体、细胞团、丝状体和根丝细胞5种方式;通过单克隆的培养,初步筛选出1个抗逆性较强、生长速度较快的新品系D,该品系1m以上长度的叶状体平均生长速度为9.4cm/d,快的可达11.5cm/d.对新品系的子一代叶状体再度酶解和观察,获得纯系的丝状体.     

长江口及邻近陆架区沉积物和间隙水中铁及其与细菌的关系探讨

本文通过对长江口及邻近陆架区12个站位的柱状沉积物、间隙水和细菌资料分析,指出了研究区沉积物和间隙水中铁的分布特征,并与细菌、地质资料对比研究、从生物地球化学角度对间隙水中铁的来源及其控制因素作了初步探讨。资料研究表明,沉积物中铁主要赋存于细粒沉积物中,腐植酸中铁由河口向陆架减少。间隙水中铁主要来自沉积物中高价铁,在弧菌科(Vibrionaceae)和假单孢菌属(Pseudomonas)细菌的媒介下,参加了沉积物中某些有机物的降解反应,接收了有机物的电子后被还原,其含量和分布主要受控于参加媒介作用的细菌。     

Analytical Study on Transmission and Reflection of Non-Linear Shallow Water Waves

The analytical study is made by using the method of matched asymptotic expansions on the transmission and reflection of solitary waves and cnoidal waves on two-dimensional floating bodies. The solutions give explicitly the variation pattern of the transmitted waves and the characteristics of the reflected waves, including the wave profile, amplitude, phase shift and evolution. The effects of the gap between the body and the sea bottom on the transmission and reflection of those waves are also discussed.     

模糊类比分析法在渔业数值预报中的应用研究

渔业数值预报除涉及水文、气象、饵料生物量、资源幼体等的资源环境因子外 ,还要考虑经济、社会等因素。本文在分析 1987～ 1993年历史资料的基础上 ,利用资料之间的类比性 ,提出渔情预报的模糊类比分析方法 ,将预报年份与历史记录之间的多指标综合类比排序 ,得出预报值。在东海北部鲐渔情预报中发现 ,与直接估算法比较 ,该方法具有所需资料少、预报迅速合理的优点 ,而且随着历史资料的扩充 ,自身能够不断学习更新。     

微藻高度不饱和脂肪酸的研究

ＡＡ、ＥＰＡ、ＤＨＡ是人以及动物所必需的脂肪酸,在人和动物和生理活动中起着重要的作用。微藻中含有丰富的高不饱和脂肪酸。本文对ＰＵＦＡ和生理功能,在微藻中的分布、合成途径及影响合成的环境因素、利用微藻生产ＰＵＦＡ等有关内容进行了综述。     

长江口区化学耗氧量的分布特征

根据“三峡工程对长江河口区生态与环境的影响和对策”的研究要求,为掌握工程兴建前长江口环境状况,我们于1985年8月一1986年5月,对122°-124°E,30°45′-32°00′N海域及受潮汐影响的江段进行了调查。本文根据5个航次的调查资料阐述了长江口海域化学耗氧量(COD)的分布特征。     

面向地质图的知识图谱构建及智能问答应用

海量地质图件蕴含着丰富的地学基础知识及专家经验知识。地质图主要表达了通过区域地质调查、矿产地质调查所获取的地球表面的地质知识（如地层单元、岩体、断裂等）。如何快速地从矢量地质图件中抽取地质知识并形成知识服务是目前地学知识图谱及知识服务研究的前沿。由于传统的地质图知识抽取主要依赖人工方式进行综合分析,本文聚焦于矢量地质图件知识表达与抽取研究,提出了一种地质图知识表达框架,提取地质图中所包含的地质实体及关系,将地质图信息以知识图谱的形式表达,并开展了基于地质矢量知识图谱的智能问答应用。最后以江西省于都县银坑幅矢量数据集为例开展实验验证分析,结果表明,本文方法能够较为全面地获取地质图中各个地质对象的信息,提高了地质图语义表达的效果,同时也可以提高地质学习人员对地质图的理解和认识,让计算机能够大规模获取地质图的知识内容。