series excited 中文意思是什麼
series excited
解釋
串勵-
We have calculated one - and two - photon absorption cross sections of the lowest excited states of a series of molecules combined with benzene, stilben, thiophene as center attached with amine, diphenylamine, diethylamine as electron - donor and nitryl as electron - acceptor ; the effects of molecular length, n center and electron - donor on two - photon absorption cross sections have been studied and all calculations have been carried out using the density functional theory at an ab initio level. it is found that the molecular length and the one - photon absorption intensity are quite strongly c orrelated factors, and that a corresponding correlation for the two - photon absorption is decreasing. it is also found that a most crucial role for the two - photon absorption is played by the n center
我們分別以苯、二苯乙烯、噻吩為中心，氨基、二苯氨基和二乙氨基為電子給體，硝基為電子受體組合形成的分子為研究對象，在從頭計算的水平上用密度泛函理論計算了這些分子在低激發態下的單、雙光子吸收強度，重點研究了分子的長度、中心和給體的供電子能力對分子單、雙光子吸收的影響。研究結果表明，分子長度與單光子吸收強度之間有密切關系，而在雙光子吸收中這種關系較弱；中心在雙光子吸收中具有重要的作用；在中心和受體一定的情況下，增加給體的供電子能力，可提高雙光子吸收強度。 -
When light emitted by excited atoms passes into a spectrometer through a narrow slit, a series of discrete lines ( lines, because that is the shape of the slit ) of color is produced
當被激活的原子發出的光通過一個狹縫發散為一個光譜時，就產生了一系列的離散線條（與狹縫的開關一樣） 。 -
In this paper, dynamic stability of parametrically excited flexible cam - follower system on the weakly nonlinear condition is investigated by using the combination of both the method of multiple scales and the technique of fourier series expansion. the equations of approximate transition curves in the plane of the dimensionless frequency and excitation ( amplitude ) parameter that separate stable from unstable solution are derived
隨后，本文採用多尺度法並結合fourier級數展開，分析了不同的凸輪從動件運動規律和不同的凸輪的升程、停程以及回程的時間分配規律下，無間隙的周期時變凸輪系統模型的穩定性，獲得了各種規律下的凸輪系統的穩定區間圖。 -
Secondly, to achieve the independent regulation of active and reactive power output from the generator side which is designed for the purpose of tracing the maximum wind - energy capturing. the paper has analyzed the mathematic model of the ac excited doubly - fed machine and the stator field orientation control strategy of the motor as vscf wind power generator. thirdly, it has put forward and designed the dual pwm converter with the capacity of energy flowing bidirectional aimed at the demand of rotor energy bidirectional flow. the author constructed reliable and integrated experimental system and did a series of experimental study including no - load, cutting - in network and power generation at, below and above the synchronous speed
論文首先分析了風機運行特性及其最佳風能利用原理，通過模擬及實驗驗證了採用直流電機的輸出特性模擬風力機的最大輸出功率曲線的可行性，並給出了模擬系統的硬體結構；然後為了實現交流勵磁發電機有功、無功功率獨立調節機理，分析了交流勵磁雙饋發電機的數學模型和在追蹤最大風能捕獲變速恆頻風力發電時必需的定子磁鏈定向矢量控制策略；針對雙饋發電機轉子能量雙向流動的要求，提出並設計了具有能量雙向流動能力的雙pwm交流勵磁用變頻器；最後為實現從理論到實踐的全面研究，研製出了一套小功率完整的雙pwm變頻器交流勵磁的雙饋風力發電機實驗系統，進行了空載、並網、同步速及上、下的發電運行等一系列的運行實驗；所完成的模擬和實驗研究均驗證了理論、模型和控制策略的正確性、可行性。 -
The two kind of harmonic balance methods, analytical hbm and dft numerical hba, are used for the analysis of the parametrically excited flexible cam - follower system with consideration of the clearance between cam and follower. through the two methods, the system equation is reduced to a series of nonlinear algebraic equations
這種非線性代數方程組需要依靠數值計算的迭代法才能求解，而由於問題的復雜性，普通的newton法很難求解，本文採用一種廣泛應用的擬newton法一一broyden方法來求解，得出了出含間隙凸輪系統模型的穩態響應。 -
According to different mechanisms, there exist several types of resonance, including the bridge resonance induced by the periodical actions of moving load series of the weights, centrifugal forces and lateral winds of vehicles, the bridge resonance induced by the loading rates of moving load series of vehicles, the bridge resonance induced by the periodical loading of train vehicles excited by rail irregularities, wheel flats and hunting movements, and the vehicle resonance induced by periodical actions of the regular arrangement of bridge spans and their deflections
根據發生機理的不同，車橋系統可能發生幾種不同形式的共振，包括由車輛重量、離心力、橫向平均風荷載等形成移動荷載列的周期性動力作用引起的橋梁共振，由移動荷載列加載速率引起的橋梁共振，由軌道不平順、車輪扁疤、輪對蛇行等周期性加載引起的橋梁共振；由橋跨的規則性排列及其撓度的影響，對移動車輛形成周期性動力作用使車輛出現的共振。 -
Kathmandu ( reuters ) - explorers have discovered a series of caves decorated with ancient buddhist paintings, set in sheer cliffs in nepal ' s remote himalayan north, leaving archaeologists excited and puzzled
加德滿都（路透社） ? ?探險者在尼泊爾偏僻的北方喜馬拉雅山區發現了一組開鑿在陡峭的懸崖上飾有古代佛教繪畫的洞穴，考古學家既興奮又迷惑。
分享友人