An inappropriate selection of signal phasing scenarios can lead to a low capacity, as well as traffic congestion of the intersection.

由于多数交叉口信号控制方案选择不合理，造成交叉口通行能力低下，交通拥挤严重。

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On the base of hardware approach, to discuss all the theory involve in active detecting sonar system, including the selection of signal waveform, digital signal sampling, digital signal processing.

以硬件为基础，对所涉及到的理论都作论述，包括探测声纳的信号波形选择，数字信号采样、处理原理与方法。

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This chapter will focus on basic signal theory and then on the selection and configuration of modular data acquisition hardware.

本章我们重点学习基本的信号理论和数据采集硬件模块的选择和配置。

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