让我们从一个简单示例开始：一维雷达通过向飞机发送脉冲并接收反射回波来测量距离和速度。脉冲发送和回波接收之间的时间延迟提供关于飞机距离 \(r\) 的信息，反射回波的频移提供关于飞机速度 \(v\) 的信息（多普勒效应）。
《纽约客》引述的内部资料显示，虽然该激进的地缘政治商业方案曾获得高层认可，但由于遭到多名员工以离职相威胁，最终被迫搁置。
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Samsung caught flak for the Galaxy Buds 3. The company’s mimicry of Apple’s AirPods was all too obvious last year when it opted for a stem or “blade” design after several generations of putting touch controls on the main housing of its earbuds. The Galaxy Buds 4 and Galaxy Buds 4 Pro continue that trajectory, as Samsung keeps adding new features with direct parallels to AirPods. The good news is, both models have been improved in various ways, all while their prices stay the same.
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