The theories of wave chunnel diffluence , multilevel depleting energy , depleting and preventing and dodging what had been brought forward recently by zhongguang lightning protection experts were also put forward 同时介绍了近期“中光”防雷专家提出的新颖防雷理论：波道分流、多级泻能和消、防、避三结合防雷理论。
After the storm move in shandong area , the moist downdrafts appears , the mgws apart from the thunderstorm and move faster , the mgws weaken gradually because absence of wave duct and energy supply 成熟阶段的对流风暴，由于中高层潜热释放和湿下沉气流进一步加强，波动传播加快； mgws和对流风暴分离后，因无“波道”机制和波能供给，波幅逐渐减小。
Frequency source is widely used in today ' s electronic equipment and even refered as " a heart " of many electronic systems . the frequency synthesizer with a lot of channels and high frequency stability by means of theory of phase locking has almost been a necessary component in the modern electronic systems such as telecommunication , radar and electronic countermeasure . the phase - locked frequency synthesizer can be generally divided into two kinds : one is digital phase locked frequency synthesizer , the other is analog sampling phase locked frequency synthesizer . compared with the prior , the latter has many merits such as lower phase noise , samller volume , lighter weight and lower power consumption and has a wide foreground in the equipments of microwave band 利用锁相原理来获得波道数目众多、频率稳定度很高的频率合成器，几乎已成为现代通信、雷达和电子对抗等电子系统不可缺少的组成部分。锁相式频率合成器一般分为数字锁相频率合成器和模拟取样锁相频率合成器两类。取样锁相频率合成器与数字锁相频率合成器相比，具有相位噪声低、体积小、重量轻和功耗低等优点，尤其在微波波段的电子设备中，具有广阔的应用前景。
