While most conventional airborne radars rely on some form of mechanically scanned antenna to transmit and receive signals, active electronically scanned array (AESA) sensors employ a fixed aperture.
Increased volatility has also made conventional price signals for assessing supply tightness less effective.
价格波动性的加剧，也导致衡量供应状况的传统价格信号的有效性降低。
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Their idea is to represent the 0s and 1s of digital signals not using voltage levels as in conventional computers, but using the presence or absence of noise.