基于SMCS的多源空间数据集成应用

为解决多源空间数据特别是不同参考基准数据实时集成困难的问题,通过分析空间元数据间关系,定义并利用元数据知识来实现空间元数据的动态聚合和目录服务SMCS的构建。实验结果表明顾及空间关系的SMCS提高了对空间信息的动态获取、处理和发布的能力和效率,为网格环境下多源数据的高效集成应用服务提供技术支持。     

1：50000数字地理底图在地质环境调查中的应用

数字地理底图为地质部门编制各种专题图提供基本地理要素。以环渤海曹妃甸滨海地区为例,以1：50000地形图为基本数据源,依据标准使用GIS软件完成了1：50000数字地理底图的制作,并对如何更好地发挥1：50 000数字地理底图在地质环境调查中的重要作用提出建议。     

成都粘土中载体桩承载力分析

通过成都粘土中载体桩工程实例的载荷试验资料,探讨成都粘土中载体桩承载特征,以及JGJ135-2007规程承载力估算问题。     

陕西中部地区粮食增产潜力及措施

农业是国民经济的基础,粮食是基础的基础。陕西中部地区素有“陕西粮仓”之称,探索其发展规律,分析其障碍因素,寻求其发展潜力,采取“一靠政策,二靠科技,三靠投入”的战略措施,对同类地区的粮食发展具有重要意义。     

GEMS: Geothermal Expert Modeling System

In carrying out geothermal-energy development projects, an exhaustive study has to be conducted on the local subsurface geothermal system based on extensive geothermal surveys and well data. The New Energy and Industrial Development Organization has had an extensive geothermal research program under way since 1987, known as the Nationwide Geothermal Resources Exploration Project. In this program, the total analysis system, which is called the Geothermal Expert Modelling System (GEMS), has been developed to systematize all processes of building models of geothermal systems based on the various regional exploration data. The aim of the system is to select narrow promising areas (about 50–60 square kilometers) for more elaborate exploration from within a region extending over hundreds of square kilometers, by analyzing the various explorations, and by building a geothermal system model of the area. This scheme includes studies to consolidate individual geothermal survey data into an integrated data base and to work out a computer-aided support system for building geothermal models. It calls for the integration of these processes into a system on a user-friendly, engineering work-station that has sufficient graphic functions. An attempt was made to actually identify promising areas in regions covered by wide-area surveys on hydrothermal systems, using the proposed total analysis system.     

辣椒、蕃茄反季节无土育苗不同基质对比试验分析

在玻璃温室内进行辣椒、蕃茄反季节无土育苗、栽培试验,得出天水地区温室无土育苗的最佳基质是,５０％体积比的木屑、河沙混合基质和木屑基质,并确定了适宜本地水质的最佳营养液配方和不同基质材料及组合的增热保温方案,为无土栽培新技术的全面推广普及提供了科学依据。     

南投大厦基坑支护止水工程的施工

深基坑支护、止水工程在高层建筑中经常遇到,结合南投大厦基坑支护、止水工程施工实践,论述了本深基坑支护、止水方案的选定及施工设备、施工技术、施工质量控制措施等问题。     

Estimates of current and historical fluxes of N, Ca, and K in the forest ecosystem Möhlin

Data on element fluxes (Ca, K, N) are presented which were obtained in the course of an extended project on element-cycling in a forested ecosystem near Möhlin, northwestern Switzerland. Current fluxes of Ca, K, and N could be compared with historical fluxes (1969–1993) with the help of soil chemistry inventories since 1969, data on the forest management, and atmospheric deposition. Since 1969, soil chemistry has significantly changed due to a distinct disintegration of humus. The decomposition of organic matter influenced strongly the element cycling. Due to this mineralization high amounts of N were released. It is, however, not fully clear in which chemical form N has been transferred out of the system. Two possible hypotheses on the N losses are defined. According to the calculated proton budget and measured element changes in the soil, it is hypothized that a large part of the mineralized organic N presumably was transformed into N₂ or more likely into N₂O. A complete nitrification of organically bound N to NO₃ ^– is also discussed but is, however, considered as less probable. In contrast to K, Ca proved to be a very sensitive element: the exchangeable Ca stock has been decreased sharply. The analysis of the current fluxes of Ca, K, and N reveals that nitrogen is abundantly present in the forest system with the consequence that the ecological balance is shifted in favour of N. Accordingly, the supply of base cations is rather scarce for the plants. Furthermore, the influence of forest management on element fluxes seems to be substantial, especially on the fluxes of base cations, but can be reduced with simple measures (e.g. removal of the bark of coniferous trees).     

海山区铁锰结壳基座的起源及其成因分类方案

本文论述了海山区铁锰结壳基座的起源及其成因分类，在剖析了铁锰结壳基座的研究历史与现状，时空分布及其属性之后，还揭示了铁锰结壳基座的起源，演化，现今性状与内在的规律性联系；同时提出了铁锰结壳基座的成因分类方案；并且指出了这个分类方案在铁锰结壳矿床学研究领域的理论和实际价值。     

镇江市基础地理信息设计与实现

介绍了镇江市基础地理信息系统的开发环境、实现过程、基本功能和应用,给出了数据库管理的具体方法。该系统为城市规划及其他部门提供辅助决策支持的基础信息,拓宽测绘服务范围;为实现城市工程地质环境评价和城市可视化提供了基础数据和平台。