randomly medium 中文意思是什麼
randomly medium
解釋
無規媒質-
The ionosphere is a complex medium, which is aeolotropy, asymmetry, dispersive and changes randomly with time. in order to improve the communication quality of the shortwave that depends on the ionosphere, we should have aknowledge of the current condition of the ionosphere in real time. the backscatter sounding of high frequency can diagnose the real - time channel characters for shortwave communication or hf radar, which is great assistant to shortwave communication and hf radar
電離層是隨機時變，各向異性，非均勻、色散的復雜介質。為了保證依賴于電離層進行的短波通信質量，必須了解電離層的實時狀態信息。高頻返回散射探測可以實時監測與短波通信或高頻天波雷達相關的天波傳播通道的狀態，對短波通信和天波雷達工作起了重要的輔助作用。 -
Method : 120 rabbit vessels were randomly divided into three groups : the vessel of control group in cryopreservative medium containing calf serum were subjeted to rate - controled slow freezing ; those of experiment group i in cryopreservative medium containing mixed animo acids were frozen by the same method as in control group ; and those of experiment group ii in the same cryopreserative medium as in control group were subjected to rapid freezing
材料和方法：取中國純種家兔股動脈120段，隨機分為3組：對照組用含胎牛血清的保護液處理，以慢凍方式降溫；實驗組1用含復方氨基酸的保護液處理，以慢凍方式降溫；實驗組ii用含胎牛血清的保護液處理，用速凍方式降溫。
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