Theory and practice of subsidence control by multi-layer grouting in overburden bed-separation zone;
覆岩离层带多层位注浆减沉的理论与实践
Compared to a pulse or impulse coding ionosonde,it is presented that a wideband Chirp ionosonde has many advantages,such as hardware with simplicity and reliability,digital signal processing flexibility,less mutual interference with other radio users and so on.
与脉冲和脉冲编码电离层探测仪相比,介绍了一种宽带Chirp电离层探测仪,其具有硬件简单可靠,数据信号处理灵活,与其他无线电用户互扰性降低等诸多优点。