頻散介質 的英文怎麼說

中文拼音 [bīnsǎnjièzhí]
頻散介質 英文
dispersive medium
  • : 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
  • : Ⅰ名詞1 (性質; 本質) nature; character; essence 2 (質量) quality 3 (物質) matter; substance;...
  1. The ionosphere is a complex medium, which is aeolotropy, asymmetry, dispersive and changes randomly with time. in order to improve the communication quality of the shortwave that depends on the ionosphere, we should have aknowledge of the current condition of the ionosphere in real time. the backscatter sounding of high frequency can diagnose the real - time channel characters for shortwave communication or hf radar, which is great assistant to shortwave communication and hf radar

    電離層是隨機時變,各向異性,非均勻、色的復雜。為了保證依賴于電離層進行的短波通信量,必須了解電離層的實時狀態信息。高返回射探測可以實時監測與短波通信或高天波雷達相關的天波傳播通道的狀態,對短波通信和天波雷達工作起了重要的輔助作用。
  2. Nano - tiopc60r, 40nm / ctm / pc = l / 80 / 100, s762. 5nm = 0. 533cm2 / u j ) ; thereby the single - layer nanoparticle tiopc / fluorinone - based azo composite photoreceptors were prepared and their photoconductive properties were briefly studied. in conclusion, two originalities can be outlined from this thesis : ( 1 ) by using 1, 4 - dioxane as disperse solvent, stable and uniform composites of tiopc, azo, hydrzone and polymer matrix were prepared, and the single - layer photoreceptors were successively fabricated with these composites, the photoreceptors showed high and wide range photosensitivity from visible to near infrared spectral regions

    綜上所述,本論文主要有以下兩個創新之處: ( )採用兩雜性的二氧六環做分溶劑,成功地實現了酞警氧鈦、綠丹藍偶氮、茶苯晚以及聚合物組成的、多相多組分體系的穩定復合,從而制備出從可見光到近紅外光區都具有高光敏性的寬響單層復合光導體。
  3. The key components in laser gyro is he - ne ring laser, and the reciprocal action theory between light and medium is the base in studying the ring laser, use the lamb half classical theory, and on the base of density matrix theory, the optical brounch equation was established, which described the movement of amplifying medium atom in the ring syntonic cavity, and according to the medium polarize theory the self consistent equations was deduced, which describe the light intensity and phasic of the counter - propagating wave. on the basis of this equations, adopted the simulation software matlab and virtual instrument programming language labwindows / cvi, we can do some simulated experiments in study the phenomenas such as amplify and dispersive characteristic of medium, mode pushing effection, burned hole effection and pattern competition, lock - in of frequency and the characteristic of light intensity and phasic of the counter - propagating wave in laser gyro

    激光陀螺的核心部件為he - ne環形激光器,而掌握光與的相互作用理論是研究激光器的關鍵,採用拉姆半經典理論為主,在密度矩陣理論的基礎上,推導環形諧振腔中描述he - ne氣體增益原子運動的光學布洛赫方程,運用極化理論得出描述激光陀螺反向行波的光強、位相所滿足的自洽場方程組,在此基礎上,運用matlab模擬軟體和虛擬儀器編程語言labwindows / cvi ,對激光陀螺中的增益色特性、率牽引效應、燒孔效應及模競爭、閉鎖效應及環激光的光強和相位特性進行模擬試驗研究,並且運用全量子理論,對激光工作原理進行分析,得出二能級系統單模輻射場的光子數密度分佈,得出激光場的光子統計分佈,模擬激光場的動態建立過程。
  4. The dielectric constant of srtio3 ( sto ) thin films is voltage - dependent near the curie temperature tc ( about 40k ). and no dispersion in is observed in sto at frequencies up to 10 ghz. yba2cu3o7 - x ( ybco ) high temperature superconducting thin film has very low microwave surface resistance

    Srtio3 ( sto )薄膜在其居里溫度附近( ~ 40k )具有電常數隨電場強度變化而變化的性,同時sto在10ghz以下電常數沒有率色性。
  5. Then, the auxiliary fields fdtd is used to the periodic structure made of dispersive material, such as the pyramid absorbers in anechoic chamber. the permittivity vs frequency property of the absorber is approached by some dispersive equation model, such as debye model and lorentz model, so the broadband response of the absorber can be gotten through one calculation

    然後將輔助場fdtd應用到色周期結構中,導出了色中的迭代式,並以暗室吸波材料陣列為例進行計算,提出用某一類型的電常數色函數(如debye型、 lorentz型等)來逼近材料的電常數率特性的方法,從而可以對吸波材料進行一次性寬計算。
  6. Test method for permittivity dielectric constant and dissipation factor of solid ceramic dielectrics at frequencies to 10 mhz and temperature to 500 deg c

    率10 mhz溫度500固體陶磁的漏電率和耗因子測定方法
  7. We give ptr ' s amplitude and phase signal of one dimension based on the theory of ptr, discuss the ptr ' s signal ' s frequency characteristic, and a method for measuring thermal diffusivity of opaque materials is introduced. then, we study on anisotropic materials " thermal conductivity, the temperature field and thermal conductivity tensor of anisotropic materials is theoretically deduced from the theory of ptr, and is proved by the experiment

    從光熱輻射理論出發,推導出一維情況下ptr信號的振幅和位相表達式,討論了光熱信號的率特性,紹了一種用ptr技術測量不透明材料熱擴系數的優化方法;接著研究分析了各向異性受調制激光束輻照下產生的光熱信號,在理論上推導出各向異性的溫度場以及熱導率張量並給予一定的實驗驗證。
  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方法在波動方程高近似中的應用及焦區的具體求解方法;討論了用小波變換化簡二維非均勻緩變條件下的波動方程;本文還討論了凹面反射的焦現象、凹面反射焦區的奇性種類,討論了二、三維凹面反射波動場非焦區、焦區的計算方法。
  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(包括放大和光路中的普通)正是融合高階色的來源。
  10. Based on the rate - equation theory of four - level system, the expressions of threshold pump power, output power and slope efficiency are given. the influence of space distribution of pump light ( the position of focusing point, dimension of pumping light and divergence angle ) to the output characteristics are also discussed. then, by investigating the effects of thermal effect of laser crystal on the size of laser cavity mode, we obtain the mode - matching principle of high power laser diode end - pumped solid - state lasers

    其中,在泵浦光的空間分佈變量中我們分別考慮了泵浦光聚焦后的腰斑大小、聚焦腰斑在增益中的位置以及泵浦光在中發角的影響;然後我們研究了在高泵浦功率下激光晶體因吸收泵浦光而產生的熱效應所導致的熱透鏡效應以及熱致衍射損耗,通過分析它們對振蕩激光腔模尺寸的影響,得到了高功率半導體激光二極體端面泵浦固體激光器模式匹配的要求,為高功率連續單nd : yvo _ 4激光器的優化設計提供了理論依據。
  11. The solution for nls equation in normal dispersion has been gotten, including chirped and nonlinear saturation medium effect, the solution for the influence of dark soliton by chirped and nonlinear saturation medium effect is discussed in detail

    摘要運用行波法求解正常色區含率啁啾和非線性飽和效應的nls方程,並由得到的孤子解討論了啁啾和非線性飽和效應對暗孤子傳輸特性的影響。
  12. In this paper, the authors study the mathematical model for seismic wave propagation in complex underground medium, discuss the boundary element method for solving seismic wave equations in frequency - domain, and investigate the computational formation of separation of wave equations in frequency - domain

    摘要分析了復雜地下情形地震波傳播的數學模型,討論了地震波數學模型數值求解的率域邊界元方法,並得到波動方程率域邊界元法的離化計算公式。
  13. The surface - wave theory was firstly provided by rayleigh, which can be used in even medium and many other learners developed rayleigh ' s theory and provided another theory which can be used in layered medium

    瞬態面波法的理論基礎是英國學者瑞利提出的半無限彈性均勻中的瑞利面波理論及其後來發展起來的半無限彈性層狀中的理論,因其具有同時可以大范圍檢測,精度好、效率高等優點,在無損檢測方面有很好的前景。
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