以均衡交叉口各车流方向的通行能力为目标，建立了固定信号配时和动态信号配时的极大极小优化模型。
Taking the equilibrium of the capacity of each flow direction as the objective, a max-min optimization model is proposed to investigate fixed timing plan methods and dynamic timing plan methods.
这种无线技术依靠使用射频(RF)信号传递信息的固定天线(即基台)的广泛网络。
This wireless technology relies upon an extensive network of fixed antennas, or base stations, relaying information with radiofrequency (RF) signals.
当多数常规机载雷达依靠机械扫描天线收发信号的时候，有源电子扫描阵列(AESA)传感器却使用固定的孔径。
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.
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