能帶近似法 的英文怎麼說

中文拼音 [néngdàijìn]
能帶近似法 英文
band approximation
  • : 能名詞(姓氏) a surname
  • : Ⅰ形容詞1 (空間或時間距離短) near; close 2 (接近) approaching; approximately; close to 3 (親...
  • : Ⅰ名詞1 (由國家制定或認可的行為規則的總稱) law 2 (方法; 方式) way; method; mode; means 3 (標...
  • 近似 : approximate; similar; approach; approximation; roughness; propinquity
  1. The opacity of element is calculated with a bsa ( band smear approximation ) theory on the basis of hydrogen - like screen average atom model

    在此基礎上,用抹平計算元素的不透明度。
  2. Lastly, we discuss the energy - band structure of ultracold atoms in optical lattice by means of green function method and in addition, procure the superfluid - mott phase transition condition in mean - field approximation which is in agreement with the result in the literature

    最後利用格林函數方討論了光格子中超冷原子的結構,根據mott相存在隙的判據我們在平均場下重新得到superfluid - mott相變條件,該結論與相關文獻一致。
  3. Comprehensively discuss the issues in application, adaptive condition and performance, propose a fast arithmetic of forward modeling and depth migration in common shot gathers with one - way acoustic wave equation based on vrselrf, and verify the arithmetic by numerical simulation. concisely discuss the cause of the creation of evanescence and the problem of lateral amplitude discontinuity result from it. fourthly, use the reflectivity model, computed to describe the fracture model, with the formula of computation reflectivity based on elastic - acoustic approximation, and the wavelet model computed by the method, wavelet creation with fourier transform, we proposed, in conjunction with vrselrf wavefield extrapolation operator

    第三,將頻率波數域穩定的變參考慢度rytov廣義屏波場延拓運算元( vrselrf )應用於疊前與疊后正演模擬、疊前與疊后深度偏移,對演算應用中應注意的問題、適用范圍、性等作了較為全面的論述;提出了基於vrselrf的單程聲波方程共炮記錄正演模擬和深度偏移快速演算,並通過數值模擬試驗對演算進行了驗證;簡要地討論了倏逝波的產生原因及其來的橫向振幅不連續性問題。
  4. Lastly, aiming at the poor results which all current algorithms do for directional textures, and cannot synthesis texture directly, aiming at the particularity of this kind of textures, we bring forward the conceptions of non frontal parallel textures and frontal parallel textures. by analyzing texture ' s direction through fourier spectrum, we introduce the conception of main direction, and solve the approximation value of texture ' s main direction by discrete approximated approach. by this way, we can synthesis indirectly simple structural non frontal parallel textures

    最後針對現有演算有方向的紋理合成效果差,無直接合成紋理圖像的難點,本論文首先提出了非正平行紋理與正平行紋理的概念,分析了它們之間的內在聯系,引入了兩個角度參數來描述紋理的朝向,採用傅立葉頻譜分析紋理的方向特性,並提出了紋理主方向的概念,本論文引入離散逼的方來求解出紋理主方向的值,這樣我們就用一種間接的方合成簡單的結構性非正平行紋理。
  5. According to the principle of correlation detection, an automatic measurement system for extinction ratio of polarizer consisted of monochromator and dsp lock - in amplifier and compurer is designed not only to eliminate the influence on measurement accuracy caused by drift of intensity of light source but also to obatain approximate extinction spectrum

    摘要基於相干檢測原理設計了一套由單色儀、數字鎖相放大器和計算機聯合使用的透射式偏光鏡消光比智化測試實驗系統,採用雙頻雙光路分光單探測器接收鎖相放大器分離信號比對進行源補償測量,克服了光源光強漂移所來的影響;實現了可見光區消光比的精確自動測量,而且可以測得的消光光譜。
  6. In chapter 3 we construct two approximation algorithms which applying bin packing algorithms for scheduling problems, one is ff ( first fit ) algorithm used in parallel machine scheduling problem pm / / dj = d / n which has a lower bound of asymptotic worst - case performance ratio, another problem is scheduling independent parallel tasks in parallel identical machine systems to minimize the makespan, we use strip packing method for it and give an approximation algorithm with asymptotic performance ratio no more than 1. 6

    第一個演算利用裝箱問題中的ff ( firstfit )演算求解極大化按期完工工件數的平行機排序問題pm d _ j = d n - u _ j ,該演算具有漸比下界。第二個演算利用二維裝箱中strippacking問題的演算求解以極小化makespan為目標的并行工件的平行機排序問題,該演算的漸比具有下界1 . 5和上界1 . 6 。
  7. In the effective mass approximation, using the two - dimensional equivalent potential model and a simple two - parameter wave function, we calculate variationally the ground state binding energy and correlation energy of positively and negatively charged excitons in finite deep gaas - al0. 33ga0. 67as quantum wells. the results show fair agreement with the previous experimental results

    在有效質量下,我們採用二維等效勢模型,並且選取了數學形式簡單、物理意義明確的兩參數變分波函數,利用變分數值計算了有限深gaas ? al _ ( 0 . 33 ) ga _ ( 0 . 67 ) as量子阱中電激子的基態束縛及相關,所得結果與實驗結果符合得很好。
分享友人