均勻平面源 的英文怎麼說

中文拼音 [jūnyúnpíngmiànyuán]
均勻平面源 英文
uniform areal source
  • 均 : Ⅰ形容詞（均勻） equal; even Ⅱ副詞（都; 全） without exception; all
  • 勻 : Ⅰ形容詞（均勻） even Ⅱ動詞1. （使均勻） even up; divide evenly 2. （分出一部分） spare
  • 平 : Ⅰ形容詞1 （沒有高低凹凸 不頃斜） flat; level; even; smooth 2 （高度相同; 不相上下） on the same l...
  • 面 : Ⅰ名詞1 （頭的前部; 臉） face 2 （物體的表面） surface; top 3 （外露的一層或正面） outside; the ri...
  • 源 : 名詞1. （水流起頭的地方） source （of a river）; fountainhead 2. （來源） source; cause 3. （姓氏） a surname
  1. 6 diversity fragmentation and evenness of ecological landscape in fukang increase with more utilization and development. the change of landscape pattern about land utilization is mainly area variation of plantation and wasteland in pluvial fan and alluvial plain, the key influence factors are the dynamic of soil moisture and salinity under the development of water and land resource

    6 、在阜康各景觀帶中，隨人為開發利用程度的增強，景觀多樣性、破碎度和均勻性增加；荒漠綠洲土地利用景觀生態格局的變化，集中體現在位於洪積扇與沖積平原的耕地和荒地面積變動上，關鍵影響因子是水土資源利用下的土壤水鹽動態變化。
  2. There are better performances in the films prepared by ba2ca2cu3ox target than by ba2cacu2ox target. the single - phase tl2ba2cacu2o8 hts thin film was obtained with a tc0 of 107k at the optimal tl2o partial pressure and thallination temperature 750. on excursion from the optimal conditions, there exist some impurities in the resultant films resulting in a reduction in tc0 and surface quality with change in the microstructure morphology

    研究結果表明，採用成分為ba2ca2cu3ox的靶材制備的薄膜性能要優于成分為ba2cacu2ox的靶材；使用組成式為tl1 . 9ba2ca2cu3oy的鉈片做鉈源時，形成的tl2o分壓達到最佳值；在最佳tl2o分壓和最佳鉈化溫度750的條件下，制備出了純相完全c軸取向的tl2ba2cacu2o8高溫超導薄膜，其tc0高達107k ，膜面均勻平整光滑，呈圓片狀組織；偏離最佳制備工藝參數的條件下，制得的薄膜中都含有一定量的雜相，雜相的生成使得tc0值下降，薄膜表面質量下降，薄膜組織形貌發生變化。
  3. The conformal microstrip antenna with some unique character has been applied in many fields, especialy on speedy objects. in this paper, an efficient fdtd algorithm is introduced to analyse the microstrip antenna. firstly, the fdtd formula in descartes coordinate system and in cylindrical coordinate system are obtained from the time _ dependent maxwell equations using the yee algorithm in a calculating region where the dielectric parameters are independent of time and space. the choice of the space discretization units and the time discretization interval are discussed which are decided by the accuracy and stability respectively. the shape and setup of the excitation source are discussed too. the excitation source is chosen to be gaussian pulse in shape. secondly, the mur ' s first - order and second - order boundary condition are deduced in cylindrical coordinate system. the methods of transforming radiation fields from near zone to far zone in the frequency domain and in the time domain are presented when fdtd is applied to analyse the characteristics of far zone. finally, three kinds of microstrip antennas are analysed. they are a slot antenna that lies on a plane ground of a microstrip, a slot antenna that lies on a cylindrical ground of a microstrip and a microstrip line _ fed aperture coupled stacked rectangular patch antenna in cylindrical coordinate system

    本文從麥克斯韋旋度方程出發，建立了笛卡兒坐標下無源空間中均勻無耗媒質的fdtd基本方程和圓柱坐標下無源空間中均勻無耗媒質的fdtd基本方程，詳細討論了fdtd法計算中時間步長和空間步長的選取原則以及激勵源的類型和設置；推導了mur一階和二階邊界條件在圓柱坐標下的差分格式；給出了在用fdtd法計算天線的遠場輻射特性時必需採用的頻域和時域近場遠場變換技術；最後用fdtd法計算了平面微帶縫隙天線、柱面共形微帶縫隙天線和柱面共形微帶層疊天線的輸入阻抗和遠區輻射場，並分析了天線的一些參數的變化對天線輸入阻抗的影響，得出了一些有用的結論。
  4. Through the methods of reflection refraction and accumulation the light could be well - proportioned to be the best way of transmission from light - line to light face

    通過對光的反射、折射和累加達到均勻的平面發光效果，用最快捷的辦法實現線光源到面光源的轉變。
  5. The application of transverse resonance theory is firstly extended further from plane homogeneous medium to the inhomogeneous spatial region by primarily combining the current martcatili method. then the simplex method is used to calculate the source point " s best position, frequency and the correspond wavenumber of the region

    重點結合已有的marcatili法，首次將橫向諧振法從平面均勻分層介質中的應用進一步延伸到模擬地殼波導的三維非均勻空間區域中，再利用單純形法，確定源點在該區域的最佳位置、最佳頻率和對應的傳播常數。
  6. Several evaporation sources, including the plane and spherical source, and their influence on film uniformity were studied

    摘要分析了幾種可能的實際蒸發源與薄膜均勻性的關系，其中包括擴展的平面蒸發源和曲面蒸發源。
  7. The characteristic of excitation of the acoustic field is investigated for sources with various frequencies. the effects of an isotropic medium, inclined formation of different azimuth, horizontal or vertical fracture and its width or density on the propagation of the acoustic field are investigated. the fluid in borehole is also investigated

    研究了聲源在不同頻率下的聲場激發特性，考察了井外介質為均勻介質、存在不同傾角的地層界面、存在水平和垂直裂縫以及裂縫寬度和密度等對井內外聲場傳播的影響以及井眼流體對井孔聲場的影響。
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