自由穿流 的英文怎麼說
中文拼音 [zìyóuchuānliú]
自由穿流
英文
free draining-
Botflies ( such as the one featured in these photos, the human botfly, or dermatobia hominis, commonly found from central mexico through to central america and south america ) are one of a number of insect species that lay their eggs on the exterior of other living creatures ( usually mosquitoes or flies ) ; when the eggs hatch, the larvae burrow into their " hosts " to feed ( breathing through the small burrow holes ) until they emerge to pupate into mature adult botflies
上面的相來自宏都拉斯共和國一個偏僻的地區，一名五歲小孩患了內眼窩腫脹，由一隊空軍流動眼外科醫療隊拖手術時拍下.一個後期的馬蠅幼蟲的呼吸孔道被發現於前眼窩. （馬蠅主要生活于墨西哥中部以及中南美洲） ?們于其他動物身上產卵，當卵孵化時，幼蟲就會穿入寄居體內（由小呼吸孔道呼吸） ，吸取營養直到成蟲Since the concept of superlattice was proposed, vertical transport in superlattice has been investigated widely. the electric field domains and current self - oscillations which result from sequential resonant tunneling between different subbands of the superlattice are very significant phenomena. such kind of oscillation can be uesd to make tunable microwave oscillaors. in this thesis, low temperature transport problem, especially the formation of field domain and the condition of current self - oscillations in doped gaas / alas superlattice with weak coupling are investigated thoroughly and also by combining the macroscopic model with the microscopic one., the voltage - current characteristic and the current oscillation are simulated. the calculated result is nearly consistent with the experimental data
由超晶格中子能級之間的順序多阱共振隧穿引起的電場疇及電流自維持振蕩現象是其中的一個非常有意義的分支，該現象可用來製作電壓調諧微波振蕩器。本論文對弱耦合摻雜gaaa alas超晶格中的縱向輸運特別是針對低溫下的場疇的形成和固定偏壓下電流自維持振蕩產生的條件進行了深入的探討，並結合宏觀模型和微觀模型對超晶格在時變電壓作用下的電壓-電流特性以及固定偏壓作用下的電流特性進行了模擬計算。
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