俘獲率 的英文怎麼說
中文拼音 [fúhuòlǜ]
俘獲率
英文
capture ratio-
( 2000 ). the neutron irradiation is assumed to derive primarily by the reaction 13c ( a, n ) i60 with a minor contribution from the marginal burning of 22ne through the channel 22ne ( a n ) 23mg in the final, high temprature phase of each flash. and we considered the influence of the various parameters such as the initial core mass, the envelope mass, the mass - loss rate, the overlap factor and the delution factor etc., and we vary their value with the pulse number
本文採用分叉s -過程反應通道，以~ （ 13 ） c （ ， n ） ~ （ 16 ） o 、 ~ （ 22 ） ne （ ， n ） ~ （ 25 ） mg為雙脈沖中子源，用最新的中子俘獲截面，利用gallino和busso等人給出的agb星三殼層核合成模型，考慮到核心質量、挖掘程度、重疊因子、稀釋因子及星風質量損失率隨脈沖數的變化，詳細計算和研究了各個金屬豐度情況下的3m 。Characteristics of rotating frequency catching of non - ideal vibration systems
一類非理想振動系統的回轉頻率俘獲特性Carrier will be capture by trap, the number of electric carrier will decrease. the trap hold back carrier to move from crystal to other crystal. it influences the electrical properties of tft
陷阱在浮獲載流子之前是電中性的，但是在俘獲載流子之後就帶電了，在其周圍形成一個多子勢區，阻擋載流子從一個晶粒向另一個晶粒運動，導致載流子遷移率下降，導致tft的電學性能下降。Design study on an electron linac for irradiation processing with a high capture efficiency
高俘獲效率電子輻照加速器的設計研究A reaction network program is created and used to analyze the astrophysical effects of the new reaction rates 18f ( p, ) 15o, 18f ( p, ) 19ne and 11c ( p, ) 12n. the new rate of 18f + p could produce form more production of 18f that expected by the rates of ref. [ coc00 ]
最近，我國原子能院就「 c （ p ，的『 「 n的直接俘獲的截面作了間接的測量[ liu03 ] ，我們根據其提供的直接部分的s因子更新了「 c （ p ，的『 zn的反應率[ liu03 ， shu03a ] ;並利用網路方程計算系統，討論了該反應率在巨質量貧金屬星中的影響。The main works and results we have accomplished are as follows : 1 ) red - detuned locking of cooling / trapping laser to the cycling transition of cesium cooling has been accomplished by means of a double - passed acoustic - optical frequency shifting system and the technique of saturated absorption spectroscopy. the short - term residual frequency jitter is less than 350khz ; 2 ) automatic controlling system by computer programs has been established for laser cooling and trapping and cavity qed experiment. the laser and magnetic fields can be controlled by the acoustic - optical modulator and the electronic - controlled logic gate respectively
具體如下： 1 ）採用了往返兩次通過的聲光頻移系統結合飽和吸收光譜技術的實驗方案，實現了冷卻俘獲激光頻率相對于銫原子冷卻循環躍遷的負失諧鎖定，短期頻率穩定度約在350khz以內，並可方便地調節其負失諧量而無須對后續光路再作調整； 2 ）建立了一套基於計算機程序控制的、銫原子激光冷卻與俘獲實驗所需的時序控制系統。Abstract : the influence of electron screening on electroncaptu re for the most abundant nuclei in massive stars at the presupernova stage is discussed by using the shell model. it is shown that the total rate of chance of el ectronfraction should be multiplied by a factor of about 0. 8 0. 9 with the elec tron screeningtaken into account
文摘:利用核的殼層模型，討論了電荷屏蔽對超新星的前身星階段一些較豐的核在一些重要的溫度-密度點的電子俘獲率的影響，結果表明由於電荷屏蔽的作用其電子豐度變化率須乘以一個0 . 8 0 . 9的因子First, variable speed constant frequency wind energy convertion theory is described in this paper, then presents a review on the development of wind turbines control and the main types of generator and static converters used to interface variable speed wind turbines to the electric grid. then discuss main circuit constructure and advantage of direct drive wind energy conversion system and introduce pitch - control method for wind power traction and electric power stability. simply aerodynamic characteristic of the turbine is analysised and permanent magnet synchnonous generator math model is established. to convert the variable frequency electricity into utility grid, back to back four - quadrant pwm - vsi is used and three typies of control strategy is presented to capture the maximum wind energy and transmit energy. then simulation is implemented to test the control strategy. in the following chapter a simple ac - dc - ac converter with a dc - dc boosting chopper is proposed to transmit the wind energy into electricity energy and two control strategy is presented
建立了永磁電機和變流器的數學模型，針對雙pwm變頻器的特點提出了三種控制策略對變流器進行控制，通過變流器交-直-交的變換，將發電機發出的變頻變幅值交流電轉化為可用的恆定頻率的交流電，通過pwm調治能使其輸出功率因數為一，並且該控制系統功率因數為可調，能在特殊情況下同電網交換一定的無功功率，並通過對變流器的控制實現了最大風能俘獲的功能。最後採用matlab / simulink進行了模擬，取得了良好的模擬效果。在風力發電系統中，採用先進的最大功率俘獲演算法，能有效的從風中獲得最大的能量。Research of maximum power extraction algorithm for inverter - based variable speed wind turbine system is going on in the last chapter. main maximum power extraction algorithm is discussed and compared. a new mppt control algoririthm is discussed to get fast and stable traking of maximum wind power in detail, then advanced hill - climb searching method has been developed for maximum wind power traction
因此本文最後對一些最大風能俘獲的先進演算法進行了研究，仔細探討了最大功率點跟蹤演算法，並提出了一種先進爬山搜索風力發電最大功率俘獲智能演算法，採用該演算法不需測量風速和風機轉子速度，並且與系統特徵參數獨立，能應用於大小各種風機，具有非常好的效果。Liposome is an effective nuclide delivery agent for neutron capture therapy. in this paper liposomes containing encapsulated gadolinium complex were prepared and characterized. the influence of formulation factors such as ph, ionic strength, buffer, and storage time upon the stability of liposomes was investigated. the uptake rate constant and its concentration dependence of lgd in tumor cells were compared in vitro with that of gd complex itself. the results indicate that the uptake rate of lgd in tumor cells increases to eight times as much as that of gd - edta, but the release rate of gd from tumor cells containing lgd is remarkably lower than that from the tumor cells containing gd - edta. the results reveal that lgd would be a potential drug for neutron capture therapy of cancer
制備和表徵了包埋gd - edta的脂質體，測定了ph ，離子強度，緩沖液組成及溫度對gd - edta脂質體的影響，比較了gd - edta脂質體和gd - edta被腫瘤細胞攝入的動力學曲線。結果表明， gd - edta脂質體在37和生理條件下最穩定，腫瘤細胞攝入gd - edta脂質體速率是gd - edta的8倍，而釋放gd的速率， gd - edta脂質體遠遠低於gd - edta ，這些結果提供了脂質體包埋gd - edta作為釓中子俘獲治療藥物的可能性。The detuning of the trapping laser is 120ghz and laser power near the focus is about 300m w. the dipole trap is characterized via the fluorescence of trapped cesium atoms
俘獲光相摘要對艷原子dz線負失諧120ghz ，俘獲光功率約300mw ，聚焦腰斑半徑約巧腳。Under certain conditions, in spite of their different modal indices the two polarized components of the pulse can trap one anther and move at a common group velocity due to xpm, the phenomenon referred as self - trapping occur
在一定條件下，盡管脈沖的兩個偏振分量的模式折射率不同，但由於交叉相位調制效應，它們能相互俘獲並以共同的群速度傳輸，產生自捕獲現象。分享友人