能級密度 的英文怎麼說

中文拼音 [néng]
能級密度 英文
density of level
  • : 能名詞(姓氏) a surname
  • : Ⅰ名詞1 (等級) level; rank; grade 2 (年級) any of the yearly divisions of a school course; gra...
  • : Ⅰ名詞1 (秘密) secret 2 [紡織] (密度) density 3 (姓氏) a surname Ⅱ形容詞1 (距離近; 空隙小)...
  • : 度動詞[書面語] (推測; 估計) surmise; estimate
  1. Abstract : the effect of correction of self - consistent potential on electronic structure in simple cubic nanocrystal particles is calculated by means of the green ' s function method in the tight - binding approximation, taking only the nearest neighbor matrix elements into account. the numerical results show that the electronic energy spectrum is shifted, the chemical potential is not equal to the atomic energy level, the electronic density at each lattice point is changed, and the variation of electronic density at surface lattice point is the largest

    文摘:在緊束縛近似下,只計及最近鄰的矩陣元,採用格林函數計算了自洽勢修正對簡立方納米晶體顆粒的電子結構的影響,發現電子譜發生了移動,化學勢不等於格點原子,各格點的電子也發生了變化,其中以表面格點的電子變化最大。
  2. 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,得出二系統單模輻射場的光子數分佈,得出激光場的光子統計分佈,模擬激光場的動態建立過程。
  3. 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

    通過原子上與光子頻率帶隙邊緣的相對位置或者光子態,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。
  4. In this paper, cholinergic neurons was mapped in the two kinds of birds ( emberiza rutila and fringilla montifringilla ) by using immunohistochemical method. the soma size and cell density of cholinergic neurons in the three song control nuclei, the higher vocal center ( hvc ), the robust nucleus of the archistriatum ( ra ) and area x, were measured and compared. here we discussed the distribution of cholinergic neurons and their effect on the process of song producing and song learning. the results show that chat - li was found in hvc, ra and areax of forebrain

    本文以中國北方地區常見的兩種鳴禽栗? ( emberizarutila )和燕雀( fringillamontifringilla )為材料,應用免疫組化方法,對兩種鳴禽發聲控制核團,即上紋狀體腹側尾核或高發聲中樞( hvc ) 、古紋狀體粗核( ra ) 、 x區( areax )內膽堿神經元的胞體大小和胞體進行了觀察測量,旨在探討膽堿神經元在發聲控制核團內的分佈情況及其在鳴囀產生和學習過程中的作用。
  5. In this thesis, we demonstrate the study of si - based light emitting materials and its importance in si - based photonics integration. we discussed mainly the gain, differential gain, threshold current of si - based quantum - dot laser and the dependence of threshold current on temperature from discrete energy level of three - dimension confined quantum - dot and state density distribution of 5 - function

    本文闡述了si基光發射材料的研究進展及它在硅基光電子集成中的重要地位,從三維受限量子點的分立和函數狀的態分佈入手,著重討論了si基量子點激光器的增益、微分增益、閾值電流及閾值電流的溫特性。
  6. A co2 laser with the optimized resonator is made and to be proved by experiments. this dissertation focus on the following problems : the kinetics process of the cvl and the co2 laser, the rate equations for the laser level population, electron temperature and electron density

    本文的重點是:闡述清楚銅蒸汽激光和二氧化碳激光的動力學過程,定量描述激光的粒子數速率方程、電子溫和電子等速率方程
  7. The entropy or number of states of system or subsystem are closely related to interaction of particles and energy level distribution, therefore, to study the temperature dependence of the specific heat may supply some important and useful microscopic information which may play an important role in understanding electronic structure, density of state, phonon spectrum etc. the specific heat measurements at low temperatures also play important roles in the finding of the third law of thermodynamics, the quantum theory of solid and bcs theory for superconducting etc. moreover, specific heat measurements help us to understand the different kinds of phase transitions ( such as : structural phase transition, magnetic phase transition, superconducting phase transition etc. ) and the scaling behavior near the critical point

    系統、子系統的熵或微觀狀態數與微觀粒子間的相互作用及分佈切相關,因此研究比熱與溫的依賴關系夠提供被測量系統許多極其有用的微觀信息,對理解固體的電子結構、電子態、聲子譜等起著十分重要的作用。低溫比熱的測量和研究對熱力學第三定律、固體量子理論和超導bcs等理論的建立起到了積極的推動作用。比熱研究還有助於認識各類相變如結構相變,磁性相變,超導相變等及臨界點附近的標規律。
  8. The principles of erasure codes used under binary erasure channels are summarized and erasure codes which belong to standard classes of rs codes are introduced with emphasis on cascaded low - density erasure codes with linear time encoding and erasure recover algorithms. thresholds of regular degree distributions are analyzed. it is shown that low - density erasure codes based on ( d, 2d ) - regular sequences of degree distribution are not close to optimal ( d 3 ). two pares of irregular degree distribution sequences are introduced and a pare of improved right regular sequences of low - density erasure codes are presented, it is testified that the new sequences are asymptotically quasi - optimal. in the meantime, simulations of cascaded low - density erasure codes based on a few types of special sequences of degree distribution available are given, together with performance analyses on these codes

    闡述了應用於刪除通道下的糾刪碼基本原理,介紹了兩類標準的rs碼類糾刪碼,重點分析了具有線性時間編碼和恢復演算法的漸近好碼?聯型低糾刪碼,分析了正則分佈的閾值,對正則低校驗碼在刪除通道下的糾錯性進行了模擬,從理論上證明了基於( d , 2d ) -正則序列的低糾刪碼都不是漸近最優碼( d 3 ) ,同時還分析了非正則低校驗碼的序列設計,基於右邊正則序列提出了一種改進型右邊正則序列,證明了此序列為漸近擬最優的,對基於幾類現有典型分佈序列的聯型低糾刪碼進行了模擬模擬及性分析; 3
  9. 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,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。改變原子上與光子禁帶邊緣的相對位置、材料中的光子態或原子初態都可以控制原子的自發輻射。
  10. In addition, some interesting questions are discussed in this thesis, for example, the effect of the configuration of nucleon on the density distributions, the sequence overturn between the 2s1 / 2 and 1d5 / 2 energy levels when the neutron halo exists, the existence of the proton halo nucleus, and the appearance of new magic number ( n = 16 ) under the weak bounded condition, etc.

    此外,論文中還討論了一些令人感興趣的問題,如核子組態對分佈的影響、中子暈存在時2s1 / 2與1d5 2次序的翻轉、質子暈核的存在以及弱束縛條件下新幻數n = 16的出現等等。
  11. Based on these two factors mentioned above and the difficulty to implement in c compiler, this paper proposed a method of modifying operand type by inserting instruction lw or sw at assemble level as well as instruction scheduling. therefore, this can generate effective parallel instructions and correspondingly improve the performance and density of object code

    本文在分析了上述兩個限制并行指令生成的主要因素以及很難在編譯器中實現并行指令生成的基礎上,提出了在匯編檢查指令的操作數類型,通過插入lw或sw指令來改變操作數類型及指令調的方法,夠有效的生成并行指令,提高了代碼運行效率和代碼
  12. When the energy distribution of secondary neutron are represented by evaporation spectrum ( lf = 9 ), care must be taken in describing the nuclear temperature near the threshold

    通過分析發現,評價次中子譜數據所採用的蒸發譜模型大都忽略了能級密度參數與激發之間的關聯。
  13. According the key factors we find, we bring forward a new conception : multilevel suppressor and design a new high performance suppressor whose ion - exchange membrane has bigger areas and using three electrodes including one cathode ( anode ) and two anodes ( cathode ), at the same time we fill the suppression compartment with one kind of ion exchange resin which has moderate exchange capacity. according to our experiment ' s results, we find the new type suppressor has quite high working current efficiency and suppressing capacity. in most cases, the suppressor ' s current efficiency is over 90 % ; the suppressor can transform the naoh ( concentration : 200mmol / l, flow rate : i. oml / min, conductance : over 10000 i - i s cm " ) to pure water ( conductance : 8. 9 it s cm in chapter 3, the high performance suppressor is applied in determination some trace - amounts ions in plating solution, sewage. in this chapter, we also have a research on the gradient ion chromatography

    第二章首先以xyz - 1型電化學抑制柱為例,分析了電化學抑制柱的抑制過程得出影響抑制容量的主要因素主要是抑制柱的電流效率和離子交換膜的極限電流,因此採用中等交換力的離子交換樹脂作為抑制室的填料以提高電流效率,在通常情況下電流效率可達到90以上;在選用同種離子交換膜的前提下,可通過增加離子交換膜的有效面積達到提高極限電流的目的從而提高抑制柱的抑制容量,因此提出了多抑制的概念並據此研製了共電極式高容量電化學抑制柱,該抑制柱最高可將流速為1 . 0ml / min ,濃為200mmol / l電導率超過10000 s ? cm ~ ( - 1 )氫氧化鈉溶液抑制為電導率低至8 . 9 s ? cm ~ ( - 1 )的純水,並且具有穩定性高、分析結果準確等優點。
  14. 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-型體系的eit的影響,發現四波混頻場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的不同多系統,我們分別採用綴飾態繪景下的矩陣方程和weisskopf - wigner近似下的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。
  15. Raised the idea of constructing hybrid capacitor with a battery based positive electrode and a capacitor based negative electrode, experiment proved that a hybrid supercapacitor with a manganese dioxide based positive electrode and an activated carbon based negative electrode showed very good performance, double electrode specific capacitance could be enhanced to 95. 7f / g, that is 2 ~ 3 times that of the carbon based supercapacitors. furthermore, the maximal voltage of a single cell could be expanded to 1. 5v, as a result, the energy density could be ten times higher than that of a carbon based supercapacitors

    本論文中我們提出了將電池哈爾濱工程大學碩士學位論文的正極與電容器的負極結合成混合超電容器的構想,並成功實現了二氧化錳正極和活性炭負極的組合,構成的錳碳混合超電容器雙電極比容量可達到95 . 7f / g ,比活性炭超電容器提高了2一3倍,單體工作電壓可以高達1 . 5v ,從而使提高到碳基超電容器的十倍。
  16. Electrochemical supercapacitor is a new energy storage component between batteries and electrostatic capacitors, which has higher power density than that of batteries and higher energy density than that of electrostatic capacitor

    電化學超電容器是一種介於電池和靜電電容之間的新型儲元件,具有功率比電池高,比靜電電容高的優點。
  17. Supercapacitors, a new energy storage components between batteries and electrostatic capacitors, when work with batteries, can meet the high power out - put need of electric vehicles when starting - up or acceleration for their power density could be tens times higher than that of batteries

    電容是一種介於電池和靜電電容之間的新型儲元件,其功率比電池高數十倍,比靜電電容高數十倍。利用超極電容和電池組成混合動力系統,夠很好的滿足電動汽車啟動、加速等高功率輸出場合的需要。
  18. In recent years, supercapacitors as the electrical energy storage systems have attracted growing attention due to the higher specific power than batteries and higher specific energy than conventional capacitors. considerable efforts have been devoted to developing and improving the performance of new available electrode materials

    電容器是近年來發展起來的一種新型儲器件,其比電容為常規靜電電容器的100倍以上,可以達到化學電源的十分之一左右,卻有著比電池高10倍以上功率
  19. The second aspect : from qgp kinetic equations with collision integrals, by using the relaxation time approximation, we calculate the distribution functions to the second order correction. we obtain the distribution functions for quarks ( and anti - quarks ) and gluons under perturbation of the fluctuation of the color field. then in the high - temperature - low - density area, we discuss the characteristics of the distribution functions, and use t hem to get the net baryon density and the energy density

    第二,從有碰撞項的qgp動力論方程出發,忽略自旋,在色漲落擾動下,利用弛豫時間近似,得到夸克和膠子分佈函數的二修正,通過數值分析重點討論了高溫低情況下qgp中成分粒子分佈函數的特性,並且由分佈函數得到凈重子數
  20. The defects energy levels intensity became smaller, the electrons on the conduction band became more and photocatalysis became better with the heat treatment temperature, the similar conclusion was drawn from experiments

    隨著熱處理溫的升高,試樣的缺陷能級密度減小,導帶上光生電子的數目相應增大,光催化效率提高,實驗中也得出了同樣的結論。
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