双组分聚氨酯防水涂料是由含异氰酸酯基(-NCO)的聚氨酯预聚体(甲组分)和含有多羟基(-OH)或氨基(-NHz)固化剂、助剂等混合物(乙组分)，按一定比例混合所形成的一种反应型涂膜防水材料。而单组分聚氨酯防水涂料一般是湿固化型的。
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NHZ hopping sequence NHZ跳频序列
In this thesis, a new quasi-synchronous multiple access scheme suitable for FH communication system employing NHZ hopping code is proposed.
为了利用无碰撞区跳频码的特点，论文提出了一种适用于基于无碰撞区跳频码跳频通信系统的多址接入准同步组网方案。
The results shown that the MAI performance of NHZ quasi-synchronous system used NHZ sequences outperforms the asynchronous system employing random hopping frequency sequences.
研究结果表明，采用NHZ跳频序列的准同步跳频通信系统的MAI性能优于采用随机跳频序列的异步跳频通信系统。
The No-Hit-Zone (NHZ) hopping code is employed by the frequency hopper of NHZ FH communication systems, which have no hits at all within a predefined correlation zone in the vicinity of zero shift.
无碰撞区跳频通信系统的跳频器所使用的跳频码是无碰撞区跳频码，该码在零位移附近一段区域内汉明相关值为零。
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