nb narrow-band 中文意思是什麼
nb narrow-band
解釋
窄帶-
This dissertation is mainly concerned about the radiation of the tem - horn arrays which radiate uwb ( ultra wideband ) pulse, it mainly involves three parts : theory, numerical stimulation and experiment. the uwb antenna is a new research field in the world which has many differences from nb ( narrow band ) antenna. the most difference is that the uwb antenna such as tem - horn radiates nanosecond pulse which has wide frequency spectrum, but the nb antenna radiates single frequency signal
超寬帶天線是一項新興的研究領域,它與窄帶天線有很多不同之處,最根本的不同在於:超寬帶天線例如tem喇叭天線是輻射納秒級短脈沖信號,這種脈沖信號有很寬的頻譜;而窄帶天線大都是輻射單一頻率時諧信號的。 -
Clinical analysis of acitretin combined with narrow - band ultraviolet b nb - uvb in treating patients with psoriasis vulgaris
聯合窄譜中波紫外線照射治療尋常型銀屑病臨床療效分析
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