The paper introduces the principle and methods of the digital separation of Y and C signals for PAL composite television signal. The analyses of these methods and the comparison between them are made.
本文介绍PAL全信号中亮度和色度信号的数字分离的原理和方法，并对各种方法进行了分析和比较。
Activities of the defense enzymes involved in POD, PPO and PAL induced by COS and L-C were measured by two different treatments of different concentrations and different induced time.
通过不同浓度和不同诱导时间两种处理方式，测定了壳低聚糖和L - C对黄瓜叶片中过氧化物酶、多酚氧化酶和苯丙氨酸解氨酶等防御酶的诱导效果。
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