atomic frequency 中文意思是什麼
atomic frequency
解釋
原子頻率-
Reliability enhancement test of the space - borne rubidium atomic frequency standard
星載銣原子頻標的可靠性強化試驗 -
Such control can be realized in case where a atom interact with photonic band gap matericals when the atom is placed in photonic crystals whose density of modes is dramatically different from that of free space vacuum. it was known that control could be achieved by varying the frequency ( which leads to the changes of the relative position of the upper levels from the forbidden gap ) or by varying the photonic density of modes ( dos ) or by varying the intial atomic state
由於光子晶體具有不同於真空中的光子態密度，原子和光子帶隙材料便發生相互作用，這樣便可以控制原子的自發輻射。改變原子上能級與光子禁帶邊緣的相對位置、材料中的光子態密度或原子初態都可以控制原子的自發輻射。 -
The subjects under research include high - performance rubidium atomic frequency standard, microwave and optical trapped ion frequency standard and cold atom frequency standard, etc. the lab
目前正在開展的研究課題有高性能銣頻標、離子阱微波頻標和光頻標、冷原子頻標等。 -
In section one, we analyze the mechanism of lwi gain, and study the effects of the rabi frequency q of the driving field, the injection rates ratio rb / r ~, the exit rate r0, the decay rates ~ and rab between atomic levels, as well as 3 incoherent pump rate r on the gain without inversion, dispersion and population difference of the system. in section two, we discuss the effects of the detuning of the driving field and the probe field on the gain
在第一節中分析了無粒子數反轉激光增益產生的機制、研究了驅動場的rabi頻率、粒子注入速率比值r _ b / r _ c 、粒子退出速率r _ o 、能級間的自發衰減速率r _ （ c - b ） 、 r _ （ a - b ）和非相干泵浦速率r對增益、色散和粒子數差的影響；第二節討論了驅動場和探測場的失諧對無粒子數反轉激光增益的影響。 -
In chapter 2, we analyzed the effect of the driving field phase fluctuation on the gain and dispersion and population differences in an open v - type three - level non - inversion lasing system and then discussed the effects of the incoherent pumping rate, the ratio of the atomic injection rates, the atomic exit rate, the rabi frequency of the probe and driving fields and their corresponding detuning on the gain, dispersion and population differences of the system, and got some important conclusions different from those in closed or other open systems
第二章討論了驅動場的相位漲落對開放的v型三能級無反轉激光系統的影響，根據解析解的數值計算結果討論了非相干泵浦速率、粒子注入速率之比、粒子退出速率、探測場和驅動場的rabi頻率和相應失諧對系統增益、色散和粒子數差的影響，得到了一些不同於封閉的v型系統及其他開放的無反轉激光系統的重要結論。 -
In chapter 3, we studied the effect of gaussian transverse profile for the driving and laser fields on lasing without population inversion ( lwi ) in a closed v - type system and an open v - type system. moreover, we discussed also the effect of the unsaturated gain coefficient, the cavity - damping rate, the ratio of the atomic injection rates and atomic exit rate on the corresponding systems. in chapter 4, we mainly discussed the effect of doppler broadening on the gain, dispersion and the frequency up - conversion of the open v - type lwi system and compared the differences and the same between the open system and the corresponding closed system
發現： （ 1 ）在考慮doppler展寬的情況下，通過選取合適的實驗室條件（比如合適的原子環境溫度等）可得到合適doppler展寬值，從而使系統獲得最佳增益； （ 2 ）要想實現系統的頻率上轉換，同時又要獲得足夠強的無反轉激光增益，則系統頻率轉換比不能選取的太大； （ 3 ）對于開放系統，比較小的粒子注入速率比與退出速率對產生無反轉激光是有利碩士學位論文摘要的： （ 4 ）由於dopp1oy展寬的存在，當探測場與驅動場的傳播方向相反時，增益在探測場失諧的某一段區域產生振蕩，且振蕩的振幅、頻率失諧范圍的大小與dopper展寬的取值有關。 -
Hydrogen atomic frequency standards
氫原子頻率標準 -
The evaluation of measurement uncertainty for the cesium atomic beam frequency standard
銫束原子頻率標準裝置測量不確定度的分析 -
Recent progress in ultrafast optics has allowed the generation of ulfcraintense light pulses comprising merely a few field oscillation cycles. the arising intensity gradient allows electrons to survive in their bound atomic state up to external field strengths many times higher than the binding coulomb field and gives rise to ion - ization rates comparable to the light frequency resulting in a significant extension of the frontiers of nonlinear optics and ( nonrelativistic ) high field physics
隨著超快光學技術的發展，僅含幾個振蕩周期的超強脈沖已經能產生，且其強度梯度可使電子存在比庫侖束縛場高許多倍的外場產生的原子束縛態上，並產生了同光頻相差不大的電離率，從而促進了非線性光學前沿及非相對論的強場物理的延伸。 -
Atomic frequency standard is a traditionally major subject of the wipm, established by t. c. wang, late famous atomic physicist and the founder of the atomic frequency standard in china
原子頻標是本所傳統優勢學科之一，由已故的著名物理學家、我國原子頻標研究創始人王天眷先生開創。 -
Has become an important base for atomic frequency standard research
已成為我國原子頻標研究的重要基地。 -
Atomic frequency standard
原子頻標 -
In late 1970 s, rubidium atomic frequency standards for ship navigation were developed, and in 1990 s a new revised was made
上世紀七十年代末，研製出船舶導航用銣原子頻標，並在九十年代末研製出換代產品。 -
The bzt thin film has good properties in high frequency. the essential principle, technology process and advantages of the ba ( zr0. 3ti0. 7 ) o3 ( bzt ) ferroelectric thin films grown on pt / ti / sio2 / si substrates and quartz substrates by sol - gel process are introduced. the heat - treatment technology was fixed according to the dsc - tg measurement, afm ( atomic force microscope ) and fe - sem ( field emission - scanning electrical microscope )
我們通過在pt / ti / sio2 / si襯底和石英襯底上制備ba （ zr0 . 3ti0 . 7 ） o3鐵電薄膜，了解了溶膠-凝膠法（ sol - gel ）制備薄膜的基本原理、工藝過程及工藝特點;並對所制得的ba （ zr0 . 3ti0 . 7 ） o3薄膜的前驅體溶液和干凝膠進行了差熱與熱失重（ dsc - tg ）分析，確定了溶膠在熱處理各個階段的反應情況。 -
Recently important progresses have been achieved on the study of miniaturized high - performance rubidium atomic frequency standards, along with several patents were authorized at home and abroad
近年來，在小型化高性能銣原子頻標研究方面取得重要進展，獲得國內外專利多項。 -
The properties of spontaneous emission depend not only on the relative position of the resonant frequency from the edge of the photonic band gap and the photonic mode density but also on the relative distance of the atomic space position from the sidebrand. and we study other property of spontaneous emission
其性質除了依賴于原子上能級與光子頻率帶隙邊緣的相對位置或光子態密度，還依賴于原子的空間位置與側支距離。並對原子的自發輻射的其它特性進行了分析。 -
The results indicate that the value of squeezed component of the atomic dipole, squeezed frequency, amplitude and squeezed direction of the atomic information entropy ca be controlled by choosing the atomic initial state, the velocity of atomic motion, the field structure and the squeezing factor of field and the squeezing phase angle of the field, respectively
結果表明，通過選擇原子初態，原子運動速度、場模結構，場壓縮因子和場壓縮相位角可以分別控制原子信息熵壓縮的偶極矩分量值、壓縮頻率、壓縮幅度和壓縮方向。 -
By continuous efforts of many scientists, various kinds of practical atomic frequency standards have been developed, including active and passive rubidium and hydrogen atomic frequency standards
經過幾代科學家的努力，已經研製出包括主動、被動型銣原子頻標和氫原子頻標在內的多種實用型頻標。 -
When the laser frequency is larger than the atomic resonance frequency ( blue detuning ), the atoms will experience a repulsing force that will repulse the atoms to the minimum place of light field. this is the principle of atomic mirror or atomic guide and trap. in this thesis, we propose three novel mirrors to reflect atoms by using intensity gradient induced by a blue - detuned semi - gaussian laser beam, a blue - detuned semi - ellipse - gaussian laser beam and a blue - detuned semi - flattened - gaussian laser beam
本文提出了三種實現原子束反射的原子反射鏡的新方案： （ 1 ）半束蘭失諧高斯光束的原子反射鏡（ 2 ）半束蘭失諧橢圓高斯光束的原子反射鏡（ 3 ）半束蘭失諧平項高斯光束的原子反射鏡，詳細計算了上述反射鏡的衍射光場的空間分佈，並討論了運動原子在光場中所受的偶極力。 -
Utc is a stable and even time scale based on the frequency of atomic oscillations in atomic clocks. this is the current international time scale for civil use
協調世界時是以原子鐘內的原子振動頻率為依據的時間標準，是十分穩定而且均勻的時標，亦是現時國際所採用的民用時間標準。
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