Two approaches are proposed for multilevel storage based on phase change technology.
提出两种实现相变存储器多值存储的方法。
The main problems in GPS technology including the system bias to SLR, its own annual variety and the change of GPS satellite antenna phase center are also discussed.
评述了GPS技术目前存在的问题，包括与SLR测量之间存在的系统偏差、GPS技术本身可能存在的周年变化和GPS卫星天线相位中心的变化。
Through the technology of Phase Change in large day-and-night temperature difference area as well as of cooling storage with night ventilation, indoor temperature can be adjusted.
目的把相变储能技术应用在夏季昼夜温差较大地区，使相变墙夜间通过通风蓄冷，调节室内温度。
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