band to band transition 中文意思是什麼

band to band transition 解釋
帶間躍遷
  • band : n 1 帶，繩；帶形物；箍；箍條；嵌條；鑲邊；鋸條； 〈pl 〉 （法官等的）寬領帶。2 束縛，羈絆；義務；...
  • to : adv 到某種狀態；〈特指〉到停止狀態；關閉。 ★也常和動詞結合，略去其後賓語，而構成成語： The door i...
  • transition : n 轉變，演變，變遷，變化；飛越；過渡期；【音樂】變調，轉調；【修辭學】語次轉變；【語法】轉換；【...
  1. We infered that this new absorption band was associated with the effect of charge - transfer transition between adsorbates and colloidal silver particles, not the effect of the surface plasma resonance due to the silver particles aggregation which was usually attributed to in previous research work

    我們將其歸因於與納米銀顆粒表面間的電荷轉移效應（ ct ） ，而非通常所認為的因銀膠凝聚而產生的表面等離子體共振吸收效應。
  2. In passive section, above all, i introduce theory about microstrip line. millimeter - wave band - pass filter and wave guide - to - microstrip transition. designing two type of coverer by image - reject mixer and hmc329

    無源電路部分，我們首先對傳輸線的種類，耦合微帶線的傳輸特性和微帶波導過渡的基本原理進行了分析。
  3. This work was supported by the state science and technology ministry of p. r. china under the contact no. g20000683 - 06, and by the national natural science foundation of p. r. china under grant no. 60046001. gallium nitride is one of the 3rd generation semiconductor materials. from 1990 ' s, gan has attracted more and more attention and advanced rapidly, mainly due to its direct transition, wide band gap ( ~ 3. 4ev ) and other excellent characters

    Gan是直接躍遷的寬帶隙材料，具有禁帶寬度大（ 3 . 4ev ，遠大於si的1 . 12ev ，也大於sic的3 . 0ev ） ，電子漂移飽和速度高，介電常數小，導熱性能好等特點，在光電子器件和電子器件領域有著廣泛的應用前景。
  4. In the paper, the transition of ka band rectangular waveguide to micro strip probe and the back - to - back structure are designed. the measurement results indicated the low insert loss and low return loss from 35 ghz to 40 ghz

    本文設計了ka波段矩形波導到微帶探針過渡結構以及背對背結構，測試結果表明，在35 40ghz頻率范圍內，其插入損耗和回波損耗都比較小。
  5. Based on the results of the theory analysis and computer simulation of suspended stripline low pass filter, band pass filter, the transition from waveguide to finline and the transition from waveguide to suspended stripline, the structure design and manufacture were made. the measured results match the requirement. different from the traditional mixers used in the domestic communications satellites, the sub - harmonic balance mixer type was used in the ka - band mixer design

    在ka頻段混頻器的研究過程中，通過對衛星和飛船所用到的混頻器進行研究，在對ka波段的傳統射頻前端電路的分析基礎上，提出改變以往星上傳統的基波混頻方案，採取了次諧波混頻方案，降低了本振頻率，簡化了本振鏈路，使噪聲特性、可靠性獲得改善。
  6. This method can not only minimize the stopband energy of the prototype filter, but also determines the inter symbol interference power and the transition band energy, which can be used to design prototype filters for both the critically sampled fmt system and the non - critically sampled fmt system

    該方法不僅可以最小化原型濾波器的阻帶能量，還界定了符號干擾功率、過渡帶能量，適用於嚴格采樣和非嚴格采樣濾波多音調制系統。
  7. At the same time, we have manufactured a transition from microstrip line to rectangle waveguide, working in full ka - band. the insert loss of a single transition is between 0. 25db and 1db

    同時，完成了ka全頻段微帶波導過渡的研製，在26 . 5 39 . 5ghz頻率范圍內，單個微帶波導過渡的插損在0 . 25 1db
  8. According to the dipole transition selection rule, it allows the system to transit from the ground state to the first and second sub - band respectively, the shape of the photoionization cross - section varying with the photon energy in the two cases is quite different

    根據偶極躍遷的選擇定則，將使得體系從基態分別躍遷到電子的第一子帶和第二子帶，二者的光電離截面隨光子能量的變化截然不同。
  9. We also have analyzed the photoluminescence ( pl ) spectra of some zno films, it turns out that the emission of ultraviolet light comes from the radiative recombination of excitons within nano - crystal energy band - gap, and the pl peaks move to smaller wavelength because zn are substituted by fe, co, and cu, which cause the size of the film grains smaller and the effective band - gap bigger. the red emission of zno films is due to, on the one hand, decrease of the film grains size which causes the emission intensity smaller and smaller until it disappears abruptly, on the other hand, the transition of electrons from deep donor level of the oxygen vacancies to the valence band

    另外，我們還對薄膜光致發光性質進行了分析和研究，結果表明：納米結構zno薄膜的紫外發光來源於帶間激子的輻射復合發光， pl譜的帶邊發射峰發生藍移是由於fe 、 co 、 cu對zn的替代使薄膜粒子的尺寸減小，使薄膜的有效帶隙增寬； zno薄膜的紅色發光，一方面是zno顆粒尺寸的減少，帶間的激子發射峰越來越弱直至猝滅，另一方面主要是與zno晶格中的o空位有關，由深能級復合發光引起紅光發射。
  10. For the receiver which uses the intermediate frequency real signal output manner, a good frequency plan should guarantee the transition band of the “ spectrum blocks ” which produced by the sampling as wide as possible, so as to ease the burden of the base - band signal processing to the minimum level. it has not been particularly analyzed in the former references about receiver design, and the main

    在以往有關接收機設計的文獻中很少對此進行過詳細的分析，其主要原因是大多數接收機系統的信號帶寬較窄（通常在2 、 3mhz以下） ， fif和fs受到的限制較少，可以很輕易的保證采樣之後各「譜塊」有足夠的過渡帶寬。
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