波場外推 的英文怎麼說

中文拼音 [bōchǎngwàituī]
波場外推 英文
wave field extrapolation
  • 波 : Ⅰ名詞1 （波浪） wave 2 [物理學] （振動傳播的過程） wave 3 （意外變化） an unexpected turn of even...
  • 場 : 場Ⅰ名詞1 （平坦的空地 多用來翻曬糧食 碾軋穀物） a level open space; threshing ground 2 [方言] （...
  • 外 : Ⅰ名詞1 （外面） outside; external side 2 （外國） foreign country 3 （以外） besides; beyond; in ...
  • 推 : 動詞1 （向外用力使物體移動） push; shove 2 （磨或碾） turn a mill or grindstone; grind 3 （剪或削...
  1. The optical rotation in er fluids is studied thoericaly. considering the different attenuation in different direction and the theory of light transmission, i derive the expression of rotation angle as function of the angle 6 ( between the electric vector of linearly polarized light and electric field ) and other parameters on the condition of several appropriates and assumptions

    考慮電場作用下電流變液中不同振動方向的線偏振光衰減不同，根據光波在介質中的傳播理論，推導出光通過電流變液的旋光角與（入射線偏振光振動方向與外加電場方向的夾角）及其它參數的關系表達式。
  2. A new waveguide made of changing a wide wall of a rectangular waveguide to a uniform curved wall is called conformal waveguide. a kind of expression of approximate solution for domain mode of the new waveguide, including symmetric, unsymmetric arc, parabolic arch, hyperbolic arch, elliptic arch, etc., is constructed by using boundary condition of mental waveguide, variational method and boundary element method. by using the equivalence principle, an approximate calculating formula for equivalent resonant conductance of a narrow longitudinal halfwavelength slot cut in the curved wall of the unsymmetric arcrectangular waveguide is derived, and the result is shown. although this solution is approximate, it can solve the problem in designing the slotted antenna of such conformal waveguide

    把矩形波導一個寬面外突成均勻曲面構成的新波導統稱為共形波導.利用金屬波導邊界條件、變分法、邊界元素法構造這種新波導中主模場的一種近似解表達式，包括曲面橫截線為對稱、非對稱圓弧，拋物線弧，雙曲線弧，橢圓弧等.然後根據等效原理，推導非對稱圓弧矩形波導曲面上窄的縱向半波長縫隙的等效諧振電導的近似計算公式，給出計算曲線.這種解雖然是近似的，但卻能解決這類共形波導縫隙天線的工程設計
  3. From the mathematical point of view, the difficulty stems from the inability to get, with the traditional global transform like the fourier transform, a simplified differential equation that governs the evolution of the basic function through the non - homogeneous medium

    這些基本函數的全局特性使其在非均勻空間的演化變得十分復雜，從而影響了傳統方法的波場外推精度及效率。
  4. Advanced mathematical technologies, especially the newly developed wavelet transform and the frame theory, provide a solid foundation for such an effort. the ray - theory based beam - summation method, such as the complex source - generated beam and the gaussian beam methods, and the local phase - space domain ( beamlet domain ) wave field extrapolation methods employing windowed fourier transform ( wft ) or wavelet transform are proposed consequently

    基於射線理論的高頻漸近射束（復射束、高斯射束）疊加方法，以窗口富里葉變換（ wft ）以及小波變換為基礎的局部相位-空間域（小波束域）波場外推方法等相繼產生。
  5. The recognition of the global nature of propagators as the difficulties " physical genesis led researchers to develop and investigate propagation methods based on the expansion of the total field by sets of spatially confined wave functions, or in other words, to construct localized wave field propagators instead of the traditional global propagators

    認識到全局性傳播運算元在波場外推中的困難，近二十年來，許多研究都致力於發展基於波場局部空間分解的局域化傳播運算元以替代傳統的全局運算元。
  6. In this thesis, we follow the idea of the beamlet - domain wave field extrapolation methods to construct localized propagators. through comparative study of signal decomposition efficiency using different representation schemes, we select two groups of basic functions with simple expressions and good localization properties for wave field decomposition, propagation and imaging

    本論文通過對wft 、小波基、小波包，以及相關的框架理論等的分析比較，選擇了兩組形式簡單，且具有適宜於波場外推特性的基本函數集合來進行波場分解、傳播及偏移成像問題的研究。
  7. Essential to their utility is the requirement that the evolution of the basic functions through the propagation environment constitutes a simplified problem with an exact or approximate closed form solution to the original wave equation. the evolution of a spatial fourier harmonic through a homogeneous medium is governed by a reduced wave equation, obtained by applying the fourier transform to the helmholtz equation, with a simple and well - known solution - the plane wave

    這些方法均採用一組具有全局特性的基本函數對波場進行分解，如占據整個空間的富氏調諧函數或充滿各個方向的dirac函數（點源） ，並通過求解基本函數滿足波動方程的精確解或近似解來達到波場外推的目的。
  8. In order to validate the feasibility of the novel algorithm, ultrawide band pulse wave is used as incident wave. computational domains are limited by absorbing boundary condition. the transformation technique from near zone to far zone is used when the sampling spot is outside of the computational domains

    時域成像技術以超寬帶脈沖源作為入射波源，用吸收邊界條件來界定計算域，而當采樣點遠離計算區域時，需要通過近?遠場的轉換技術把近場等效面上的信息轉換到遠場，本文採用簡單而實用的柱面波外推法作為近?遠場的轉換方法，收到了較好的效果。
  9. It has powerful competitive capacity and huge application market in china for all of its advantages, such as strong spanning ability, light dead weight, rapid construction speed, beautiful configuration etc. nevertheless, for some reasons, its research work lags behind its engineering practice seriously, affecting its further application and dissemination

    拱型波紋鋼屋蓋是一種新型的空間鋼結構，具有跨越能力大、自重小、施工速度快、造型優美等突出優點，因而在我國有著強大的競爭力和廣泛的應用市場。但由於種種原因，無論在國內還是國外，其理論研究都嚴重滯後於工程實踐，嚴重影響了結構的進一步推廣和普及。
  10. This phenomenon was, at least in part, the result of the promotional efforts of market practitioners keen to develop their businesses

    此外，市場參與者為積極發展本身業務而大力催谷，推波助瀾，其實亦是造成上述後果的部分原因。
  11. According to the experiences with capital account liberalization in different countries, capital account liberalization and capital inflows surging in developing countries can promote the financial development ; meanwhile the economy in developing countries faces more and more indefinitude. the asian financial crisis in 1997, the financial turbulence in brazil and russia in 1998, the financial crisis in argentine in 2001, and the financial crises occurred in emerging market countries more frequently, seem to prove that, the stability of financial system in quite a few countries faces severe challenge, accompanying with the process of capital account liberalization. then, how could developing countries carry out the progress of capital account liberalization to ensuring the financial system stability

    對于具有相對健全的金融體系的國家來說，資本賬戶開放有助於一國金融體系效率的提高和金融體系規模的快速擴張，能夠減輕乃至消除資本管制的巨大成本，推動國內金融市場的進一步深化;但隨著資本賬戶的開放，國際資本流動帶來了巨大的負外部性，使一國宏觀經濟和金融體系中不確定性增加，將對一國銀行體系資產負債規模和結構產生負面影響，使本國金融市場更易受到波動，並且增加金融部門系統性風險，加大了金融監管的難度，這會對脆弱的金融體系形成沖擊。
  12. In addition, this paper has analyzed and calculated the wave - guide mode theory, got the quantum well laser photic - field distribution ' s fluctuation equation, deduced the far - field distribution ' s mathematics model by the method of stepwise approached, and simulated the near - field and far - field about the laser with computer software. we utilized a pair of mode expand layers which can restricted in photic - field to narrowed the far - field comer about quantum well laser material structure ( the corner was about 21 ?

    另外本文還對光波導模式理論進行了理論分析和計算，得到了量子阱激光器光場分佈的波動方程，利用逐步逼近的方法推導出了遠場分佈的數值模型，通過計算機軟體模擬出了激光器遠近場分布圖，並利用模式擴展層對光場的限製作用得到了窄遠場發散角（約為21 ）的量子阱激光器材料結構。
  13. Scanning near - field optical microscope ( snom ), as a kind of new important optical apparatus that is used to observe appearance or investigate immanent essence of sub - wavelength objects, has been played a crucial role in the wide range of physics, chemistry, biology, medical science, geology, it estate in last years. one of difficulties of conventional snoms is the relatively low power of out signal

    近場光學顯微鏡（ snom ）作為一種用於觀察和研究亞波長物體的外觀形貌和內在性質新的重要光學儀器，于近幾年來，在納米和介觀尺度上，為物理、化學、生物、醫學、地質和信息產業等的研究和生產提供了許多新的知識，也極大地推動了近場光學的發展。
  14. The infraredray ( pet ) plastic oven own the gold prize of the second china international new technology famous brand products fair, in 1998 and 1999, the product acquired ningbo consumer association recommending product and trustable product in zhejiang province, in 2007 the factory acquired the title of aaa of customers satisfaction, also it gained the quality certificate system of is09001 : 2000

    其中遠紅外（ pet ）塑料專用烘箱獲「第二屆中國國際新技術名優產品博覽會」金獎， 98 、 99年獲寧波市消費者協會推薦產品， 99年浙江市場信得過單位， 07年獲全國烘箱設備行業質量信譽消費者滿意aaa單位，並已通過了is09001 ： 2000國際質量體系認證。
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