The performance of Direct Sequence Spread Spectrum(DSSS) in severe pulsed noise interference will be badly degraded when the duty factor is small.
当脉冲干扰占空比较小时，干扰能量集中，导致直接序列扩频（DSSS）系统的误码性能较差。
2
Functional groups of the oxidizing degraded products of Black Wattle extract have been studied by using chemical classified tests, IR spectrum and conductivity titration methods.
通过“化学分类试验”与红外、电导滴定法等联用，对荆树皮栲胶不同氧化降解程度产物的官能团进行了研究。
3
UV-Vis spectrum indicated that the phenyl structure and naphthyl structure of methyl orange were destroyed, methyl orange solution was degraded.