頻散現象 的英文怎麼說

中文拼音 [bīnsǎnxiànxiàng]
頻散現象 英文
spectral dispersion phenomenon
  • 頻 : Ⅰ形容詞（次數多） frequent Ⅱ副詞（屢次） frequently; repeatedly Ⅲ名詞1 [物理學] （物體每秒鐘振動...
  • 散 : 散動詞1. （由聚集而分離） break up; disperse 2. （散布） distribute; disseminate; give out 3. （排除） dispel; let out
  • 現 : Ⅰ名詞1 （現在; 此刻） present; now; current; existing 2 （現款） cash; ready money Ⅱ副詞（臨時; ...
  • 現象 : appearance （of things）; phenomenon
  1. This phenomenon is called velocity dispersion.

    這種現象稱為速度頻散。
  2. Zhoushan maritime space of archipelago scattering and gullet intervein lies in median latitude, which has complex terrain geographic and atmosphere - sea electrophoresis and has frequency gale doubtless weather

    群島散布、水道縱橫交錯的舟山海域地處中緯度地帶，具有復雜的地理環境和大氣海洋現象，大風災害天氣頻繁。
  3. No specific symptoms in early stage. as the disease progresses, there may be urinary frequency, difficulty in passing in urine, or blood stained urine. if the cancer spread to the pelvic cavity, it may cause pelvic pain or backache

    早期並不明顯，繼而出現尿頻排尿困難小便赤痛或小便帶血等現象，假如癌細胞擴散到盤腔附近，便會引起盤骨或脊骨痛楚。
  4. When the source frequency increases, the dispersion and the attenuation of signals become great, but the resolution is better

    當聲源主頻增大時，波形頻散現象較嚴重，幅度衰減較大，但探測能力增強。
  5. Based on experimental research on electrical property of waterflooded rock we have found that variation of salinity has much effect on rock resistivity, and it makes that relation curves of complex resistivity and in - phase resistivity of rock under single frequency with water saturation are characteristic of u - style curve, just like relation curves of waterflooded rock resisitivity with water saturation, but salinity variation has little effect on rock dispersion property

    摘要通過水淹巖石巖電特性的實驗研究發現，地層水礦化度的變化，對巖石電阻率幅值的影響較大，致使單一頻率下的巖石復電阻率幅值和同相電阻率也會象常規電阻率一樣，隨著含水飽和度的變化，出現" u "形曲線，而相對而言，地層水礦化度對巖石頻散特性的影響較小。
  6. In this paper, a gray video md - 3d - spiht algorithm is proposed, which extends the md - spiht algorithm into 3d - spiht. this method is to divide the 3 - d wavelet coefficients into some number p of different groups according to their spatial and temporal relationships, and then to encode each group independently using 3d - spiht algorithm, so that p independent embedded 3d - spiht substreams are created. multiple descriptions are created

    2 、將md - spiht方法推廣應用於視頻序列，提出了灰度視頻md - 3d - spiht演算法，該演算法先對一組視頻圖象進行多級離散三維小波變換，在小波域建立空間方向樹，及對空間方向樹分組，再分別對各組進行3d - spiht編碼，即產生多個描述，且每一描述的碼流是完全嵌入式的，易於實現質量可分級編碼。
  7. The numerical results of the dispersion relation show some nonlinear effects : for a fixed geometry of a waveguid, beam parameters and plasma density, the increment of the modulation parameter may lead to a slight increment of the operating frequency, however, as the modulation parameter increases further, saturation may occur and the dispersion relations are hard to be separated, it is due to the overmodulation of the microwave power, this phenomenon itself belongs to the nonlinear effects

    對於一定的波導、電子注參量和等離子體密度值，等離子體調制系數的增加，使工作頻率略微升高。但是，隨著等離子體調制系數的進一步增加，色散曲線變得彼此之間不可分辨，可以認為是等離子體的過調制導致了柵的飽和。這一現象是非線性的，可見，等離子體柵和調制場中文摘要是非線性關系，等離子體柵是非線性j 。
  8. This thesis discusses maslov ' s method, wavelet transform and their applications to asymptotic evaluation of wave equations in high frequency fields. the method of solving wave equations in caustic domain by symplectic geometrical theory, and the method of simplifying two - dimension wave equations in slowly varying nonhomogeneous medium by wavelet - transform theory are proposed. the caustics phenomena of electromagnetic wave propagation in concave reflector, the singularities of caustics, and the method of computing wave fields in and far away from the caustics in concave reflector are also discussed

    本論文探討了maslov方法在波動方程高頻近似中的應用及焦散區的具體求解方法；討論了用小波變換化簡二維非均勻緩變介質條件下的波動方程；本文還討論了凹面反射的焦散現象、凹面反射焦散區的奇性種類，討論了二、三維凹面反射波動場非焦散區、焦散區的計算方法。
  9. In succession, the theory of chirped - pulse amplifier system is given in detail, firstly, studying from designing experimental light road and optical components to theoretical analysis, we par ' tly finished the system by ourselves. about ultr a - shoft pulse with a pulse - width of 9. 8f s and output power of 650mw and band - width of about l 20nm is output from oscillator source, secondiy, the stretching capacity of single grating four - pass stretcher is measured using abcd matrix combining collins function, and the effect of relativ e parameters to the streching ratio is also simulated. thirdly, a new type of disjunctional frequency moduiating function is provided according to the gain - narrowing and gain - saturation which are appeared in the co urse of amplification, under modulating the two effects are both controlled on some e xtent, fourthiy, the effect of ase that is often ignored by people is analyzed and the resolving methods are also given

    從光路、光學元件的自行設計到理論分析計算，初步建立了一臺實驗系統；採用abcd矩陣法結合collins公式計算了四通式單光柵展寬器的展寬量，並模擬了相關參數對展寬比的影響，對實驗具有指導意義；評價了再生放大器和多通放大器的優缺點，對放大過程中通常忽略的放大自發輻射現象（ ase ）進行了分析，並提出了相應的解決方法；針對放大過程中出現的增益窄化和增益飽和現象，對輸入種子脈沖提出了一種新的分段頻率調制函數，實現了對增益窄化效應和增益飽和效應的共同抑制；提出了系統的材料（包括放大介質和光路中的普通介質）正是融合高階色散的來源。
  10. After the weather system getting into mature stage, its cg flash rate begin to decline and its percentage of positive cg lightning begin to go up rapidly meanwhile. sometimes all the cg flashes produced at dissipating stage are of positive polarity

    在系統進入成熟階段后，地閃頻數開始下降，而正地閃所佔比例顯著增加，在系統消散階段甚至會出現短時間內全為正地閃的現象。
  11. Firstly, the multiple modes and dispersion nature of ultrasonic lamb wave are investigated in theory. furthermore, optimization of excitation signal is performed experimentally with the four parameters : the transport mode, the center frequency, the amplitude and the number of the wave ’ s peak value

    本文首先從理論上分析lamb波的多模式和頻散現象，在理論基礎上結合實驗在傳播模式、中心頻率、信號幅值、波峰數等幾個方面對lamb波進行優化。
  12. It shows that when wave propagates along axis direction, the displacements of radial, axis direction and the change of electric field are coupling each other, and there is dispersing phenomenon, and the displacement of circle direction can figure out independently, it has not dispersing phenomenon

    發現當波沿著圓柱殼體軸向傳播時，物質的徑向運動軸向運動和電勢的變化相互耦合，伴有頻散現象但是扭轉運動可以獨立表示，並且同電場無關，無頻散現象。
  13. Finally, some important conclusions were drawn, that is, using distributed pzt transducers, ultrasonic guided waves are generated and received in a pipe. usually, there are many different modes of guided wave propagating in the pipe and these modes are generally dispersive, the specific exciting signal of a harming windowed toneburst with a central frequency of 70khz for decreasing the effect of dispersion was selected. and guided wave are generated using 16 distributed pzt transducers in a circumferential direction for suppressing flexural modes

    首先，對當前本課題研究領域的進展作出綜述，並簡要介紹與超聲導波技術相關的理論基礎；其次，建立了一套有效的實驗裝置，在此實驗裝置基礎上，重點研究了採用分散式pzt傳感器在管中激勵和接收特定模態超聲導波的方法：根據在管狀波導中傳播的超聲波具有頻散現象及多模態特徵，選擇具有單一頻率的特定信號激勵超聲導波，使其頻散最小；同時採用分散式傳感器抑制不同模態的波型。
  14. Since the cause of caustics phenomena is that the tangent plane of lagrange submanifold in caustic fields is perpendicular to the original physical space, we solve the high frequency asymptotic problem in a new mixed space by changing the projecting direction, then we get the high frequency asymptotic solutions of wave equations efficiently near and on the caustics

    由於出現焦散現象的原因在於lagrange子流形在該處的切平面與物理空間垂直，通過轉換適當的投影方向，然後將這個投影方向上得到的高頻近似解再變換回到原來的物理空間中，得到了在焦散附近適用的高頻近似解。
  15. Frequency locking of propagating wave fronts in reaction - diffusion systems

    反應擴散系統中波傳播的鎖頻現象
  16. 2 ) in order to solve the scattering and diffraction of sound radiation, in this dissertation, based on helmholtz equation and its boundary equations, modeling of three - dimensional fem is given for computing low frequency sound transfer function in small enclosures

    2 ）為解決聲音在傳播過程中所發生的散射和衍射現象，本文基於有源helmholtz方程及其邊界條件，建立了求解小尺度封閉空間內低頻聲傳遞函數的三維有限元模型。
  17. In these kinds of small enclosures, scattering and diffraction in the course of sound radiation could n ' t be ignored

    對于這類封閉空間，聲音的低頻成份的波長與空間尺寸相當，聲音在傳播過程中發生的散射、衍射等現象不容忽視。
  18. Aim to eliminate the blur in imaging, time - frequency method are used. it can be used in imaging process as well as do with the image. at last, we analyze the image resolution and scattering ’ s anisotropy under wide - aperture imaging

    針對非理想散射中心在圖像域造成的「展布」現象，應用時頻方法來處理和消除這種「展布」效應，概括出了四種時頻方法處理框圖，並討論了它們的適用性。
  19. This thesis is part of the project of national science foundation of china “ study on color video coding based on four - dimensional matrix ”. a multi - matrix theory model has been established in the project. and the color video is presented into a four dimensional matrix model and the four - dimensional discrete cosine transform ( 4d - mdct ) is applied to reduce the correlation between color components and adjacent pixels

    將多個彩色視頻幀構建在一個四維矩陣模型中進行運動補償預測、四維矩陣離散餘弦變換和矩陣量化，最後利用基於上下文的變長編碼方法進行壓縮，以全面去除彩色視頻各象素之間、各彩色分量之間以及連續幀之間的相關性，從而實現高信噪比條件下的高倍壓縮。
  20. The paper analyses and studies the general questions in the remote control system, such as the delay - time of network, software system structure, human - computer interaction technology, robot control function and real - time video transmission and so on. then we design and develop a remote control system of zjmr based on web, and apply the distributed object technological - corba to this system. it not only realizes the original system ' s mutual operation function, which is developed by different programming language, but also improves the platform independency, mutual operation function and expansibility greatly

    本文以我們自行設計、研製的移動機器人zjmr為研究對象，在對zjmr移動機器人本地控制系統設計實現的基礎上，著重對遠程控制系統中的共性問題如：網路時延問題、軟體體系結構、人機交互技術、機器人控制功能和視頻圖像實時傳輸等方面作了深入地分析和研究，最後設計並開發了一個基於web的機器人遠程控制系統，並將分散式對象技術corba應用於機器人遠程控制系統中，不僅實現了原系統不同開發語言之間的互操作功能，而且極大地提高了系統的跨平臺性、互操作性和可擴展性。
分享友人
分享到 Line

分享到臉書