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截止区
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  cutoff region
     Then the graph of the changes of group and energy velocity with the length of cutoff region and the main frequency of the wave packet is received.
     计算了波包穿越势垒的群速和能量速度,得到群速和能速与截止区长度的关系图,以及群速与激励源的工作频率的关系图。
短句来源
     Furthermore,the attenuation caused by the leaky and cutoff effect is determined in the cutoff region and the deduced expression reveals the phenomenon of large attenuation constant but with low radiation efficiency.
     根据该准则我们分离出泄漏效应和截止效应各自对衰减常数的贡献 ,并推导出在截止区内衰减常数的解析表达式 . 该表达式清楚地显示了截止区中大衰减常数低辐射效率的现象 .
短句来源
     An Efficient Method to Analyze the Radiation Characteristics in the Cutoff Region of Open Guiding Wave Structure
     一种研究开导波结构中截止区辐射特性的有效方法
短句来源
     The propagation constants of dominant HE11 -mode in the cutoff region of a circular waveguide are discussed. They can be obtained by solving the characteristic equation using the Newton-Raphson method.
     讨论了圆波导截止区内主模HE_(11)的精确传播常数,它可由Newton-RaPhson法解特征方程而获得。
短句来源
     It illuminates that the main part which transit cutoff region is high-frequency ponderance.
     说明通过截止区主要是高于截止频率的高频分量。
短句来源
更多       
  cut off region
     Then the graph of the changes of group and energy velocity with the length of cutoff region and the main frequency of the wave packet is received.
     计算了波包穿越势垒的群速和能量速度,得到群速和能速与截止区长度的关系图,以及群速与激励源的工作频率的关系图。
短句来源
     Furthermore,the attenuation caused by the leaky and cutoff effect is determined in the cutoff region and the deduced expression reveals the phenomenon of large attenuation constant but with low radiation efficiency.
     根据该准则我们分离出泄漏效应和截止效应各自对衰减常数的贡献 ,并推导出在截止区内衰减常数的解析表达式 . 该表达式清楚地显示了截止区中大衰减常数低辐射效率的现象 .
短句来源
     An Efficient Method to Analyze the Radiation Characteristics in the Cutoff Region of Open Guiding Wave Structure
     一种研究开导波结构中截止区辐射特性的有效方法
短句来源
     The propagation constants of dominant HE11 -mode in the cutoff region of a circular waveguide are discussed. They can be obtained by solving the characteristic equation using the Newton-Raphson method.
     讨论了圆波导截止区内主模HE_(11)的精确传播常数,它可由Newton-RaPhson法解特征方程而获得。
短句来源
     It illuminates that the main part which transit cutoff region is high-frequency ponderance.
     说明通过截止区主要是高于截止频率的高频分量。
短句来源
更多       
  “截止区”译为未确定词的双语例句
     The bandwidth of 200 nm for both rejection region and transmission band is obtained at wavelength 1550 nm.
     对一个典型的短波通截止滤光片,在波长1550 nm,截止区和透射带宽均达到了200 nm。
短句来源
     The numerical method based on the finite difference method in time domain is applied to calculate the five eigenfunctions of the Open cavity within aperiod(t=0, T/4, 2T/4, 3T/4, 4T/4). The eigenfunction is divided into four areas: the cut-off area、 the standing wave area、the transition area and the traveling wave area.
     用时域有限差分法计算了不同的径向位置在t=0,T/4,2T/4,3T/4,4T/4等时刻的径向电场Er随纵向距离z的变化,并根据计算结果将开放腔中的场从左到右分成四个区:截止区,驻波区, 过渡区和行波区。
     The simulations of heterostructure wavegiude indicated that the group velocity of the wave packet was superluminal and the intensity of electric field decayed by -42dB.
     对异质波导(heterostructure wavegiude)的模拟表明:对于横截面尺寸均匀但填充两种不同介电常数的电介质的异质波导,高斯波包以大于c的群速度穿过截止区,而电场的幅度衰减了-42dB。
短句来源
     The distribution of the field is divided into four regions,the cut-off region,the standing wave region,the transition region,and the traveling-wave region.
     在20~36.85 cm区域电场每经过1/4周期向右传播1/4波长,表现出行波特性。 由此根据该计算结果将开放腔中的场从左到右分成4个区:截止区、驻波区、过渡区和行波区。
短句来源
     This thesis focuses on the establishment of new drain current models in the linear region, the saturation region, the forward and reverse sub-threshold region, and new off-leakage current models in the off region on based of MOSFET model.
     本论文以MOSFET为模型基础,对I-V特性进行了理论分析,建立了线性区、饱和区的漏极电流模型,重点建立了精确的亚阈值前区、亚阈值后区漏极电流和截止区的泄漏电流模型。
短句来源
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  cutoff region
Based on the numerical solution, two critical values of ?, ?A=0.607 and ?B=2.380, which represent the appearance of the cutoff region and the disappearance of the strong dispersion region, are found.
      
Estimation of the extent of the cutoff region from the spatial distribution of labelling and mitotic indices of intestinal crypt
      
Current understanding of the pattern of proliferation within intestinal crypts involves the notion of a cutoff region introduced by Cairnieet al.
      
Excellent accuracy has been obtained for the entire frequency spectrum, even near the cutoff region.
      
For steep power-law spectra, as mostly considered in this work, this is always the lower energy cutoff region.
      
更多          
  cut off region
These bands are not shown in the spectrum since they are located in the cut off region of the solvent.
      


The propagation constants of dominant HE11 -mode in the cutoff region of a circular waveguide are discussed. They can be obtained by solving the characteristic equation using the Newton-Raphson method. Discussions are also presented for the effect of a dielectric material filled in the inner space of circular vaveguide.

讨论了圆波导截止区内主模HE_(11)的精确传播常数,它可由Newton-RaPhson法解特征方程而获得。还讨论了波导内填充介质的影响。

This paper is concerned with study of guided wave propagation in step-index elliptical dielectric waveguides by WKB approach. We give formulas for computation of dispersion characteristics corresponding to "whispering gallery" modes and "bouncing ball" modes respectively. We also give criterions for "whispering gallery" modes and "bouncing ball" modes for different ellipticities of the elliptical boundary·Computed dispersion curves are presented for different ellipticities. The results of our method are in good...

This paper is concerned with study of guided wave propagation in step-index elliptical dielectric waveguides by WKB approach. We give formulas for computation of dispersion characteristics corresponding to "whispering gallery" modes and "bouncing ball" modes respectively. We also give criterions for "whispering gallery" modes and "bouncing ball" modes for different ellipticities of the elliptical boundary·Computed dispersion curves are presented for different ellipticities. The results of our method are in good agree- ment with exact computation results, except for very near cutoff. However, our expressions are rather simple for calculations and are convenient to apply.

本文用WKB方法分别分析了椭圆阶跃型介质波导内存在的“耳语廊”模和“反弹球”模,并给出了用以计算相应于这两种模式的色散特性的公式.本文也给出了对于不同偏心率椭圆,相应于这两种模式的模式判别式.本文结果同精确计算结果相比,除近截止区外,两者符合很好.本文的方法简单且便于应用.

This paper is concerned with the study of guided wave propagation in step-index elliptical dielectric waveguides by ray optics method,we apply the method of asymptotic solution to eigenvalue problems by Keller and Rubinow and derive formulas for computation of dispersion characteristics corresponding to“whispering gallery” modes and“bouncing ball”modes res- pectively,we also give criterions for different ellipticitiesof the elliptical boundary.Computed dispersion curves are presented for different ellipticities....

This paper is concerned with the study of guided wave propagation in step-index elliptical dielectric waveguides by ray optics method,we apply the method of asymptotic solution to eigenvalue problems by Keller and Rubinow and derive formulas for computation of dispersion characteristics corresponding to“whispering gallery” modes and“bouncing ball”modes res- pectively,we also give criterions for different ellipticitiesof the elliptical boundary.Computed dispersion curves are presented for different ellipticities. The results of our method are in good agreement with exact computation results,except for very near cutoff.However,our expressions are rather simple for calculations and are convenient to apply.We also give the birefringence curves.

本文用射线光学的方法分别分析了椭圆阶跃形介质波导内存在的“耳语廊”模和“反弹球”模,并给出了这两种模式相应的传播常数表达式,其计算结果与精确计算机数值分析的结果相比,在非近截止区,两者符合很好.本文的方法可处理任意偏心率值的椭圆介质波导,要比其它方法简单,亦便于使用.

 
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