輻射能密度 的英文怎麼說
中文拼音 [fúshènéngmìdù]
輻射能密度
英文
energy density of radiation-
Radiation spectrums of relativistic charged particles in a dipolar magnetic field were studied numerically in detail by using the current density of moving charged particles in this paper
摘要從運動的荷電粒子產生的流密度出發，研究了在地球偶極磁場中運動的相對論性荷電粒子的輻射能量譜，並對其進行數值計算。It is designed according to electrical stove or microwave oven request. heating pipe adopts high temperature resistance mgo powder as the insulation medium and the stainless steel case is passed oxidation deal through the advanced web band protection oven 1050c in order to become the a special oxidation layer and improve the high temperature oxidation and bittern corrosive performance of the heating pipe. the heating tube has high power density and strong heat radion. this product with good safe performance can work normally after 3000hrs life test
加熱管選用耐高溫氧化鎂作絕緣介質，不銹鋼外殼經過先進的網帶氣體保護爐1050的氧化處理，形成一種特殊的氧化層，提高電熱管的抗高溫氧化及鹽鹵的腐蝕性能。電熱管的功率密度較高，熱輻射能力強。產品經長達3000h的壽命試驗后，仍能正常工作，安全性能好。The key components in laser gyro is he - ne ring laser, and the reciprocal action theory between light and medium is the base in studying the ring laser, use the lamb half classical theory, and on the base of density matrix theory, the optical brounch equation was established, which described the movement of amplifying medium atom in the ring syntonic cavity, and according to the medium polarize theory the self consistent equations was deduced, which describe the light intensity and phasic of the counter - propagating wave. on the basis of this equations, adopted the simulation software matlab and virtual instrument programming language labwindows / cvi, we can do some simulated experiments in study the phenomenas such as amplify and dispersive characteristic of medium, mode pushing effection, burned hole effection and pattern competition, lock - in of frequency and the characteristic of light intensity and phasic of the counter - propagating wave in laser gyro
激光陀螺的核心部件為he - ne環形激光器，而掌握光與介質的相互作用理論是研究激光器的關鍵，採用拉姆半經典理論為主，在密度矩陣理論的基礎上，推導環形諧振腔中描述he - ne氣體增益介質原子運動的光學布洛赫方程，運用介質極化理論得出描述激光陀螺反向行波的光強、位相所滿足的自洽場方程組，在此基礎上，運用matlab模擬軟體和虛擬儀器編程語言labwindows / cvi ，對激光陀螺中的介質增益色散特性、頻率牽引效應、燒孔效應及模競爭、閉鎖效應及環激光的光強和相位特性進行模擬試驗研究，並且運用全量子理論，對激光工作原理進行分析，得出二能級系統單模輻射場的光子數密度分佈，得出激光場的光子統計分佈，模擬激光場的動態建立過程。Spontaneous emission can be totally suppressed or strongly enhanced depending on the relative position of the resonant frequency from the edge of the photonic band gap and the photonic mode density. several novel phenomena can be obtained. the spontaneous emission displays an oscillatory behavior, classical light localization, photon - atom bound state, nonzero steady - state population and anomalously large vacuum rabi splitting. and localized mode associated with a defect site in an otherwise perfect photonic crystals, acts as a high - q micro - cavity
通過原子上能級與光子頻率帶隙邊緣的相對位置或者光子態密度，可以抑制或增強原子的自發輻射。分析並得到了一些奇異的現象，如自發輻射的諧振子行為、光的局域、單光子?原子局域態、上能級中存在非零穩態原子布居數、類似於真空中的拉比頻率分裂等。As contraction continues and the density increases, the dust becomes so thick at the center of the cloud that it absorbs the far-infrared radiation.
當收縮過程繼續進行下去，密度不斷增大時，氣塵雲中心的塵埃就會變得極其濃密，因而能夠吸收遠紅外輻射。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。Based on the spectral irradiance measured with the sun - atmosphere ultraviolet spectrum radiometer ( sauvs ) developed by the institute of atmosphere physics and the changchun institute of optics and fine mechanics, chinese academy of sciences, measuring the direct and scatter irradiance spectrum of ultraviolet waveband which arrives in beijing global surface, giving a method of retrieving the aerosol optical depth ( aod ) and put up with primary results that exponential function can fit the retrieval results according to its visibility, putting forth different coefficients and functions on variable visibility, also giving a primary analysis on the aod in dust - storm day and some contrast between sun - day and dust - storm day, analyzing the ratio between scatter and total irradiance, and its relationship with atmosphere mass and total atmosphere optical depth, lastly contrasting with the survey results by aeronet beijing station, the results of retrieval is in reason, this work gives some help in researching the co - effect of aerosol - radiance - climate and makes preparation for further survey on the radiance characteristics of dust
利用中國科學院大氣物理研究所與長春光學精密機械研究所合作研製的太陽?大氣紫外光譜輻射計（ sauvs ） ，測量到達北京地表的太陽直接和散射紫外光譜輻射，導出了大氣氣溶膠的光學厚度。初步結果表明：北京紫外波段大氣氣溶膠的光學厚度在絕大部分情況下隨波長的增加而單調減小，用指數函數可以較好地擬合反演結果，統計得到了三個水平能見度狀況下擬合函數的系數值和公式表達式；初步分析了揚沙、浮塵、沙塵暴天氣條件下氣溶膠光學厚度的特點，並與一般晴朗天氣條件下的氣溶膠光學厚度特點做了比較分析；分析了太陽紫外譜輻射中散射輻射與大氣質量、大氣總光學厚度的定性關系和定量表達式；最後與全球氣溶膠監測網路（ aeronet ）北京站的資料做比對，表明反演結果基本合理。It is found that the fwm field can cause the asymmetry of electromagnetically induce transparency profile. in addition, the effect of different propagating orientations of probe field on the electromagnetically induced transparency is also discussed. in the molecular multi - level system with the perturbed superposition levels, we discuss the electromagnetically induced transparency, spontaneous emission enhancement, double dark resonance and double electromagnetically induced transparency by using the density matrix equation under weisskopf - winger approximation and dressed - state density matrix equation
針對實際的實驗條件，考慮了一種影響量子干涉的新的因素-四波混頻場，研究了四波混頻場對雙光子探測的-型能級體系的eit的影響，發現四波混頻場能夠導致雙光子探測的eit線型的不對稱，在此基礎上，討論了不同探測場的傳播方式對eit的影響，針對分子中實際存在的包含有微擾能級的不同多能級系統，我們分別採用綴飾態繪景下的密度矩陣方程和weisskopf - wigner近似下的密度矩陣方程詳細地討論了電磁感應透明、自發輻射的干涉相消和相長、雙暗態共振和雙電磁感應透明現象。This effects can be explained as follows : the radiation conditions are actually impedance matching condition in terms of microwave network, for a fixed dimension of a resonator and output transformer, only below the critical plasma density ", the matching condition can be satisfied in the smith circle map
我們提出，這一現象可從阻抗匹配的角度來解釋。對於一確定尺寸的腔體、阻抗變換器，存在一個等離子體密度的臨界值，只有在等離子體密度低於這個臨界值時，腔體的輸出阻抗和波導的特性阻抗才能滿足匹配，即滿足所謂的輻射條件。Compared with traditional air - conditioning, its advantages lie in thermal comfort energy efficiency free use of spacing and etc. this paper introduces the procedure and the result of the experiment of gas - heater radiant floor system and gshp radiant floor system and compares them with traditional air - conditioner. based on the analysis of the heat transfer of radiant floor, this paper uses the theory of heat transfer to establish a mathematical model and computes it with difference equation. the important factors inferred from the model such as floor surface temperature heat intensity composite heat transfer coefficient deviate from the experiment result in a small range of 20 % and fit the need of the practical use
在分析了輻射地板傳熱機理的基礎上，文中利用熱傳導、大空間的自然對流換熱等傳熱學理論建立了輻射地板的傳熱模型，再採用有限差分方法對模型求解，所得有關輻射地板供冷熱性能的重要參數如地板表面平均溫度、熱流密度、地板表面復合換熱系數等與實測值相差在20以內，滿足工程使用要求；同時得出輻射地板盤管供水溫度是影響地板供冷熱性能的重要因素的結論。The average range of nonthermal radiation particles is direct proportion to the energy extent of nonthermal radiation particle, but also inverse proportion to the density of stellar gas, however, to the stationary black hole with mass multipole moment and nonstationary black hole, the average range of their nonthermal radiation particle still has something to do with direction, which are the new results reported firstly
非熱輻射粒子的平均射程與非熱輻射粒子的能量范圍成正比、與星際氣體的密度成反比；對動態黑洞和一類具有質量多極矩的穩態黑洞而言，非熱輻射粒子的平均射程還與方向有關。這些都是首次報道的新結果。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。This decrease in the defect pl intensity is probably caused by the increase of the nonradiative tunneling transition with multiphonon emission because of the increase in the density of si dbs
缺陷pl強度的減小可能是因為隨著sidbs密度的增加，與多聲子有關的，從導帶到懸掛鍵的非輻射通道遷移的增加而引起的。In addition, the control of spontaneous emission of a three - level atom embedded in photonic crystals was investigated in this paper, because the model of two - level atom is siple. as it shows, 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 intial atomic state
二能級畢竟是最簡單的模型，故在最後，還對光子晶體中三能級原子的自發輻射特性進行了研究。結果表明，其自發輻射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外，還依賴于原子的初始狀態。分享友人