Colloidal silver particles are formed on float glass by heat treatment with coated silica film containing Ag by sol-gel process.The Sn2+on surface of float glas
首先对三类不同卫星导航系统时间基准偏差监测途径进行简要介绍,并首次把高精度PPS(pulse per second)测量这种方法成功应用到GPS-GLONASS时差监测中。针对PPS测量方案作了较为详尽的论述和说明,包括硬件配置、数据采集和后处理等内容,在试验中利用两台GPS和GLONASS双模接收机分别输出1PPS的GPS和GLONASS秒脉冲信号,使用斯坦福大学的SR620精密时间间隔计数器进
The enhancement of interface bonding between cement and polymer and the structural reticulation of the water-soluble polymer are proposed to minimize the shorte
Based on the composition of float glass, the resistance of glass to water, in which a small amount of K2O (0—1.0 wt%) was substituted for equivalent amount of
Magnetostrictive actuators normally use twin-crystal magnetostrictive materials as driving unit. Because the crystal and twin-crystal plane hinder the movement