This paper analyzes the principle, characteristics and key technologies of DM-GIS, which is used in location based service (LBS), presents the efficient technological scheme for application.
笔者分析了应用于空间定位服务（LBS）的分布式移动地理信息系统（DM-GIS）的原理、特点和有关关键技术，提出了应用DM-GIS技术的解决方案。
The characteristics and the hydration process of fly ash were discussed. The working principle and the technological process of porous light wallboards made from fly ash were also described.
讨论了粉煤灰特性及其水化过程，介绍了粉煤灰多孔轻质墙板的生产工艺原理和工艺流程。
In this paper, the principle, technological characteristics, property and its application of PECC technology were described.
概述了等离子体增强电化学表面陶瓷化技术的原理、工艺、特点、陶瓷层性能；并展望了应用前景。
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