optimum signal level

coupling mechanism between upper level and low level jet

fiscal system at county level and township level

interaction between upper level and lower level

municipal level and county level

(ultra-wideband) UWB signal

0 signal method

2(n) sequence pseudo-random signal

20 Hz Electric Source Signal

2-D ESPRIT(estimation of signal parameters via rotational invariance techniques)

2D harmonic signal

2-D image signal acquisition

2-D impulse signal

2-D signal processing

2-D temporal-spatial adaptive signal processing

2DPSK signal

2FSK signal

3 DNA signal amplification

3-D analytical signal