方氏腔 的英文怎麼說
中文拼音 [fāngshìqiāng]
方氏腔
英文
fontana's space-
Scientists show how salmonella food bacteria in space become more virulent in their weightless surroundings
科學家顯示腔隙的沙門氏菌食物細菌如何在他們的無重量環境方面變得更有毒。It also gives the motive of the ka - band vco and mixer, associated with the subject ' s requirement and the realistic conditions, according to which a proposal is confirmed that the gunn diode and the varactor are mounted in the same cavity to fulfill the vco and an antiparallel diode pair is used to fulfill the harmonic mixer. in chapter 2, based on the basic theory of negative resistance oscillating, we analyses the gunn oscillator and it ’ s tuning character. chapter 3 introduces the theory of millimeter - wave harmonic mixer
以此為根據結合課題需要和實驗室的實際條件,確定vco採用耿氏管腔體振蕩器形式,變容管與耿氏管安裝在同一個腔內以進一步減小體積,採用反向並聯二極體實現諧波混頻;第二章介紹負阻振蕩器理論及其調諧原理;第三章介紹毫米波諧波混頻器基本原理;第四章給出了振蕩器及諧波混頻器的設計過程,整個組件聯調的結果;最後是結束語,分析了電路中存在的問題,指出了改進方向。Biological evaluation of dental materials. part 2 : biological evaluation test method of dental materials. salmonella typhimurium reverse mutation assay ames mutagenicity test
口腔材料生物學評價.第2單元:口腔材料生物試驗方法.鼠傷寒沙門氏桿菌回復突變試驗ames試驗
分享友人