threshold frequency
英 [ˈθreʃhəʊld ˈfriːkwənsi]
美 [ˈθreʃhoʊld ˈfriːkwənsi]
网络 截止频率; 极限频率; 阈频率; 门限频率; 起点频数
双语例句
- Electrons are ejected from the object only when the frequency of the radiation is greater than a certain minimum value, called the threshold frequency.
仅当辐射频率大于某一最小值即极限频率时，物体才会发射出电子。 - So, for example, we were talking about a threshold frequency as in a minimum frequency of light that you need in order to eject an electron from a metal surface.
举个例子来说，我们谈论的临界频率是，光从金属表面逐出一个电子，所需的最小频率。 - Experiments and Model Calculation of Soft Threshold for the Frequency Shifted Feedback Nd ∶ YLF Laser
频移反馈Nd∶YLF激光软阈值实验与模拟计算 - Effects of Military Noise on the Average Hearing Threshold of the Speech Frequency and High Frequency in the Elders
军事噪声对老年人言语频率及高频听力的影响 - The general expression of the threshold gain and frequency in the DFB lasers was deduced by using the coupled wave function.
利用耦合波方程，推导出分布反馈激光器自混合干涉频率及增益变化的表达式。 - When the peak Stokes fluence exceed the damage threshold of frequency conversion crystals, the fatal damage on the crystals are the most serious.
TSRS效应不仅会造成泵浦光能量严重损失，使倍频效率大大降低，更严重的是，当TSRS产生的斯托克斯光的峰值能量密度大于频率转换晶体的破坏阈值时，将会造成频率转换晶体永久性破坏。 - Then, the threshold based on Stein's unbiased risk estimation was used to eliminate the noise in the high frequency coefficients and the double criteria, and holding frequency singleness and little energy losses were used to set the threshold of the low frequency coefficients.
对于高频系数，采用基于Stein无偏似然估计原理的自适应阈值；在干扰信号的统计特性未知的情况下，对低频系数阈值的选取采取保持频率单一和能量损耗小的双重标准。 - Both speech hearing threshold and high frequency hearing threshold of the noise and heat group were obviously higher than those of the group with noise exposure only, and the difference was significant ( P < 0 01).
高温噪声组的语言听阈和高频听阈比噪声组明显增高，差异均有显著性（P<001）。 - The results show that, for the case of detuning, both the second threshold and the critical frequency are always increased with the increasing of the detuning parameter.
结果表明，在失谐情形下，第二阈值和临界自脉冲频率都随失谐参量的增大而增大。 - The green light with a power of 11.3 mW and an efficiency of 2.3% was obtained. Laser threshold for self frequency doubling operation is measured to be 1 mW.
获得113mW的自倍频绿光输出，光光转换效率为23%，自倍频腔阈值为1mW。 - The Dual Threshold Frequency Control of Digital Control Device
数控装置的双门槛频率控制 - Influence of masking noise on hearing threshold and frequency discrimination in guinea pigs
掩蔽声对豚鼠听阈和频率辨别阈的影响 - In addition, speech hearing threshold and high frequency hearing threshold increased with the length of exposure to both heat and noise environment ( P < 0.01).
语频听阈和高频听阈随高温噪声暴露时间的延长而增高（P<0.01）。 - Comparison has been done about the sample selecting of the partial duration series method and the annual maximum series method by using the statistical simulations. The effect of different threshold values on the frequency analysis results has been studied.
本文运用统计试验方法对部分历时序列法与年最大值统计法两种不同取样方法的比较、不同阈值对频率分析结果的影响等方面进行了研究。 - The de-noising process of the method was ( described). The effects of the size of correlation region, the hard and soft threshold, the frequency and S/ N of original signal, were discussed.
系统的描述了该方法的滤噪过程，讨论了相关运算区域大小、软硬阈值法、信号的频率、信噪比对滤噪结果的影响。 - Mixed coding method of remote sensing image based on wavelet package decomposing is that threshold of low frequency and high frequency coefficients decomposed by wavelet package is classified into important and unimportant coefficients.
基于小波包分解的遥感图像混合编码方法，首先将小波包分解后的低频和高频小波系数域值化为重要系数和非重要系数。 - First, the image is divided into two parts, high and low frequency, then we get the VQ codebook by means of comparing the threshold in high frequency and extracting representative codewords at different regions in low frequency part.
该算法将图像分割为高频、低频两部分，在高频段采用阈值比较的方法，在低频段采用分块提取的方法生成VQ码书。 - The variable relationship between the threshold of the high frequency extrapolation in the wavelet bi-linear interpolation algorithm and its correspondent peak of the signal-to-noise ratio ( PSNR) is analyzed in detail. The wavelet bi-linear interpolation search algorithm on the PSNR maximum is proposed.
详细分析了在小波双线性插值中高频外推阈值门限与峰值信噪比的变化关系，提出了基于峰值信噪比最大的小波双线性插值搜索算法。 - Bone conduction threshold shift at speech frequency was associated with the ages.
语频骨导听力损失程度随着患者年龄的增加而逐渐加重。 - Evaluation of Hearing Threshold of Lower Frequency in Deaf-mute Children With 40 Hz AERP and Its Influence on Sleeping
40Hz听觉相关电位评价聋哑儿童低频听阈及睡眠对其影响的探讨 - Segmentation of Ultrasonic Image Using Getting Optimal Threshold by Frequency field Analysis
用频域分析最佳阈值的方法进行超声医学图像分割 - An improved image enhancement algorithm by contour threshold nonlinear extrapolation in frequency space was proposed.
对非线性外推图像增强算法进行分析，充分考虑图像高频分量的局部特征，提出一种新的非线性滤波剪切策略包络阈值剪切算法。 - The theoretical models are given on the basis of gain threshold and lasing frequency by virture of double mirror-cavity model.
采用等效双镜腔模型，从增益阈值和振荡频率方面给出了理论模型。 - The article introduces a kind of dual threshold frequency control circuit for digital control device.
文章介绍了一种数控装置的双门槛频率控制电路。 - The research results show that the threshold values of power frequency electric field, power frequency magnetic field and audible noises with harmful influence on biology are higher than the relevant limited values of power transmission line;
研究结果表明：工频电场、工频磁场和可听噪声对生物有确定有害影响的阈值远高于输电线路有关量的限值； - The new methods can rapidly and efficiently obtain the informations of a real sinusoidal signal's phase on time domain or frequency domain by zero-crossings or FFT transforming. The modified methods can extend the threshold SNR of frequency estimation, and it is easily implemented.
新的修改算法利用零交越或FFT变换，能快速有效地在时域或频域上得到实正弦信号的相位信息，改善了频率估计的SNR阈值，且便于工程实现。 - Using the adaptive threshold filtering algorithm and frequency domain LMS filtering algorithm to suppress the narrowband interference and found some disadvantage with it.
详细研究了自适应阀值滤波算法及频域LMS滤波算法，对将其应用于导航接收机的干扰抑制的性能及缺陷做了详细分析。 - Frequency domain filter algorithms include Threshold filter algorithm and Frequency block least mean square algorithm.
频域滤波算法有阈值滤波算法，频域块处理LMS滤波算法。