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截止    
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  cutoff
    THE DETERMINATION OF THE EFFECTIVE TRANSMITTANCEOF THE CUTOFF GLASS FILTERS
    关于锐截止型滤光片有效透射比的确定
短句来源
    When electromagnetic wave has been fed into the cell, a uniform TEM field is established with a frequency lower than the cutoff frequency of TE_(10) mode of rectangular wave guide.
    当电磁波输入传输室后,一个小于矩形波导TE_(10)模截止频率的行波电磁场被建立起来。
短句来源
    Following its,the effective transmittance of the cutoff glass filter was calculated based on the definition and the measured spectral transmittance by UV spectrophotometer and the solar spectral irradiance on the earth curface under standard atmosphere conditions.
    采用现代紫外分光光度计测量锐截止型有色光学滤光片的光谱透射比和Lowtran7提供的标准大气下地面的太阳光谱辐照度,按定义计算了滤光片的有效透射比。
短句来源
  cut off
    The results show that the fluorescent wavelength has influence on imaging property of confocal microscopy such as spatial cut off frequency, resolution and 3D OTF.
    结果表明 ,不同的荧光波长对共焦显微镜的空间截止频率、分辨率、光学传递函数存在明显的影响。
短句来源
  cut-off
    Design of pipe cut-off parts for blood processing system
    血液处理管路截止部件的设计
短句来源
    Halfvalue width of signal τ_m is used to estimate high cut-off frequency f_c. The theoretical basis and applicable range of the equation of f_c=1/1.7τ_m are discussed.
    用信号半值宽度τ_m来估计光电系统的高频截止频率fc,讨论了fc=1/1.7τ_m的理论依据和适用范围。
短句来源
    The converter between rectangular guide and trapezoidal-groove guide is designe d, and it’s cut-off characteristic is analyzed by finite-element method.
    设计了梯形槽波导到矩形波导的过渡段 ; 用有限元法分析了整个过渡段的截止特性 ,保证矩形波导到梯形槽波导的单模传输 ;
短句来源
    The low cut-off freqnency of the transducers for apexcardiography and phonocardiography
    心尖搏动心音换能器的下限截止频率
短句来源
    CUT-OFF FREQUENCY ALGORITHM FOR THE ULTRASONIC SIGNALS FROM COARSE GRAINED MATERIALS PROCESSED BY SPLIT SPECTRUM TECHNIQUE
    分离谱法处理粗晶材料超声信号的截止频率算法
短句来源
更多       
  cut-off
    Design of pipe cut-off parts for blood processing system
    血液处理管路截止部件的设计
短句来源
    Halfvalue width of signal τ_m is used to estimate high cut-off frequency f_c. The theoretical basis and applicable range of the equation of f_c=1/1.7τ_m are discussed.
    用信号半值宽度τ_m来估计光电系统的高频截止频率fc,讨论了fc=1/1.7τ_m的理论依据和适用范围。
短句来源
    The converter between rectangular guide and trapezoidal-groove guide is designe d, and it’s cut-off characteristic is analyzed by finite-element method.
    设计了梯形槽波导到矩形波导的过渡段 ; 用有限元法分析了整个过渡段的截止特性 ,保证矩形波导到梯形槽波导的单模传输 ;
短句来源
    The low cut-off freqnency of the transducers for apexcardiography and phonocardiography
    心尖搏动心音换能器的下限截止频率
短句来源
    CUT-OFF FREQUENCY ALGORITHM FOR THE ULTRASONIC SIGNALS FROM COARSE GRAINED MATERIALS PROCESSED BY SPLIT SPECTRUM TECHNIQUE
    分离谱法处理粗晶材料超声信号的截止频率算法
短句来源
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  cutoff
Let Γ be a smooth compact convex planar curve with arc length dm and let dσ=ψ dm where ψ is a cutoff function.
      
The short-wave cutoff boundary of the capillary wave spectrum is established.
      
Thus, as the particle concentration increases, the central jump in compression [shock wave] moves in the direction of the nozzle cutoff, while the Mach number on the axis of the jet in front of the forward jump diminishes.
      
The results of an experimental study of a flow of rarefied gas of density ~10-5 g/cm3 beyond the cutoff of a hypersonic nozzle (M?11) by means of an electron beam with energy up to 43 keV are presented.
      
A study is made of the propagation of three-dimensional acoustic perturbations in a two-dimensional gas flow in axisymmetric channels of variable cross sectional area at frequencies near the cutoff frequency.
      
更多          
  cut off
Stabilograms of the body's general center of gravity (GCOG) were recorded for 15 s, including 6 s of silence, auditory stimulation (1.6, 3.2, or 4.8 s), and silence after the signal was cut off.
      
When the equilibrium was upset as a result of a change in plant weight, the movement of the beam's shutter cut off the flow of light incident on the photoelectric cell.
      
After 1, 2, 3, or 4 days, the treated leaves were cut off and mechanically infected with the potato virus X (PVX).
      
All leaves of young plants were cut off except the 4th, 5th, 6th, 7th, and 8th leaves.
      
We show that the threshold of the reaction under consideration tends to decrease with increasing z; the energy spectra of γ-ray sources at energies of ~10 TeV must be cut off in accordance with the calculated z dependence.
      
更多          
  cut-off
The results show that the 95% cut-off point for TC was 220 mg/dL, while for TG, it was 160 mg/dL.) increased significantly (P >amp;lt; 0.05).
      
PM was collected with a 13-stagelow pressure impactor (LPI) having an aerodynamic cut-off diameter ranging from 10.0 μm to 0.03 μm for a size-segregated collection.
      
The two cut-off points of these three stages are the preconsolidation stress and the structural yielding stress of the original clay, which could be determined by shear wave velocity measurement.
      
The proton energies of the population are below the low energy cut-off of the main dispersed proton population of the magnetosheath origin, and its intensity and density are also much lower.
      
The effect of the cut-off radius of the interparticle potential on the process of phase transformation is analyzed, and the position of spinodal of superheated liquid and supersaturated vapor is estimated.
      
更多          
  cut-off
The results show that the 95% cut-off point for TC was 220 mg/dL, while for TG, it was 160 mg/dL.) increased significantly (P >amp;lt; 0.05).
      
PM was collected with a 13-stagelow pressure impactor (LPI) having an aerodynamic cut-off diameter ranging from 10.0 μm to 0.03 μm for a size-segregated collection.
      
The two cut-off points of these three stages are the preconsolidation stress and the structural yielding stress of the original clay, which could be determined by shear wave velocity measurement.
      
The proton energies of the population are below the low energy cut-off of the main dispersed proton population of the magnetosheath origin, and its intensity and density are also much lower.
      
The effect of the cut-off radius of the interparticle potential on the process of phase transformation is analyzed, and the position of spinodal of superheated liquid and supersaturated vapor is estimated.
      
更多          


This paper discusses some problems about the mechanical design of a piston attenuator which is used as the primary standard of attenuation at 30MHz. The problems concerned are how to resolve the contradiction between the requirements of precise geometric shape and exact dimension in the manufacture of the circular waveguide, how to design the driving mechanism necessary for precise axial measurement by the laser interferometer, and how to strengthen the rigidity of the piston rod for decreasing the effects caused...

This paper discusses some problems about the mechanical design of a piston attenuator which is used as the primary standard of attenuation at 30MHz. The problems concerned are how to resolve the contradiction between the requirements of precise geometric shape and exact dimension in the manufacture of the circular waveguide, how to design the driving mechanism necessary for precise axial measurement by the laser interferometer, and how to strengthen the rigidity of the piston rod for decreasing the effects caused by the swing of the sliding receiving coil. The error due to the inconsistency between the actual displacement of the receiving coil and the readings of the laser interferometer caused by the temperature fluctuation is analysed also in this paper.

本文叙述在进行30兆赫标准截止衰减器的机械结构设计中所考虑和解决的一些问题,即解决截止波导要同时获得精确几何形状与精确半径尺寸的矛盾、与激光测长精度相适应的传动机构、加强内轴套刚性以减少测量时接收线圈相对于激励线圈扭摆所造成的影响。文中还分析了温度波动使接收线圈实际位移量与激光干涉测长值不符而产生的误差。

Analysis of frequency spectrum of human ECG using method of real-time frequency spectrum analysis and filter method is presented.Experimental results indicate the largest upper cut-off frequency of human ECG 12 leads is about 30 Hz,thus a low-pass circuit system can satisfy the requirement of transmission of ECG without wave distortion.

本文介绍了用实时频谱分析法和滤波器法对人体心电信息作频谱分析。实验结果表明,人体十二导联心电信息频谱频率上限的最大值在工程上可以认为是在30Hz 左右,因而,高端截止频率为30Hz 的特性良好的低通电路系统即可满足不失真地传输心电信号。

It is well known that the moisture adsorption is the main reasonfor optical instability of thin film optical filters. In this paper the study of moisture penetration process in edge filters, multi-cavity broad band pass filtersetc. consisted of ZnS and MgF_2 by using the adsorption technique is presentedand the change in their spectral performance is demonstrated. For short wavepass filters the shift of the edge wavelength is about 200 A, while for multi-cavity broad band pass filters with the spacers of MgF_2...

It is well known that the moisture adsorption is the main reasonfor optical instability of thin film optical filters. In this paper the study of moisture penetration process in edge filters, multi-cavity broad band pass filtersetc. consisted of ZnS and MgF_2 by using the adsorption technique is presentedand the change in their spectral performance is demonstrated. For short wavepass filters the shift of the edge wavelength is about 200 A, while for multi-cavity broad band pass filters with the spacers of MgF_2 the shift around 250A.These experimental resulfs are well consistent with that of theoretical simulationinvolved the concept of the packing density of thin films, carried out in a PC--1500 computer.

潮气吸附是薄膜光学滤光片的光学不稳定性的主要原因。本文介绍了利用吸附技术研究ZnS和MgF_2构成的截止滤光片、宽带滤光片等的潮气渗透过程及潮气吸附所引起的分光特性的漂移。对于短波通滤光片,这种漂移可达200A左右,而对于间隔层为MgF_2的多腔宽带滤光片.漂移量可达250A左右。这与基于薄膜的聚集密度概念在PC-1500袖珍计算机上模拟的结果相当一致。

 
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