本发明提供了一种组合式排插,其包括:排插盒和若干插座单元;排插盒包括:底盒,固定架,面板;插座单元包括插座盖和插座底座,插座底座包括若干不同功能的插座底座,对应不同功能的插座底座,插座盖上设有相应的插座槽或者控制部件;插座盖为方形,插座盖的第一对向侧面的两个侧面均设有至少一个卡槽,固定架上设有卡勾,插...
Theoretical variance #1 (Theol) has been developed at NIST to improve the estimation of long-term frequency stability. Its square-root (Theol-dev) has two significant improvements over the Allan deviation σ{sub}y(τ) (Adev) in estimating long-term frequency stability, in that (1) it can ...