second time derivative 中文意思是什麼
second time derivative
解釋
二階時間導數- second : adj 1 第二的；第二次的；二等（的）。2 次等的；較差的；劣於…的 （to）。3 〈美國〉較年輕的。4 另一...
- time : n 1 時，時間，時日，歲月。2 時候，時刻；期間；時節，季節；〈常pl 〉時期，年代，時代； 〈the time ...
- derivative : adj. 導出的；派生的。n. 1. 派生物。2. 【語言學】派生詞。3. 【化學】衍生物。4. 【醫學】誘導法[劑]。5. 【數學】導數，紀數，微商。adv. -ly
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In this dissertation, we study some stability properties for two impulsive differential systems employing lyapunov ' s second method : one system is impulsive hybrid differential system : the other is differertial system with impulses at variable time : herein these stability results do not require a lyapunov function to have a negative definite first derivative along trajectories of the system, further we may not require its derivative to restrict the function increasing growth ; and we do not give conditions on continuous portion or discrete portion of the systems respective ! } ", hence we can give mixing conditions on them
在這篇碩士學位論文中，我們主要藉助lyapunov第二方法的思想，討論了兩類脈沖微分系統：脈沖混合微分系統和具有依賴于狀態脈沖的微分系統的穩定性問題。不同於以往的研究，本文所找的lyapunov函數沿系統軌線的一階導數不再局限於常負或定負，甚至不用其導數來限制其增長速度；不再局限於對離散或連續部分分別設置條件，而是對其離散和連續部分設置混合條件。 -
From absorption spectra and the second - order derivative spectra, three absorption speaks of excitons were clearly resolved. at the same time, the first exciton absorption peak got stronger with decreasing nanocrystals size. blue shifts due to quantum confinement were observed obviously
納晶吸收譜及二次微分譜的測量結果表明，納晶在室溫出現了三個激子吸收峰，第一激子吸收峰隨納晶半徑減小而增強，同時清楚地觀察到納晶受限導致的光譜藍移。
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