CBTC is adopted for signal system of Xi 'an Subway Line 2, which is a complete and movable block train control system based on wireless communication technology.

西安地铁2号线信号系统采用完整的、基于无线通信技术的、移动闭塞制式的CBTC列车自动控制系统。

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The author introduces the concept of the movable block system, structural installations, situations at home and abroad and the advantages of the movable block system.

介绍了移动闭塞的概念、构成设施、国内外情况及移动闭塞的优势。

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Its key is to eliminate unlimited blocks and movable blocks, find out and study the key block at free face, and propose rational reinforcement measures for potential instable blocks.

其核心可归结为排除无限块体和不可动块体找出临空面上的关键块体，对其进行分析研究并对可能失稳的块体提出合理的加固措施。

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One proposal: a set of giant movable gates to be built on the land separating Lake Pontchartrain from the Gulf that when closed could block tidal surges, and when open, improve water flow.

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