实际频率

在实际频率没有发生偏离的情形下，利用该修正幅值可以精确确定出电压幅值；

When the actual frequency is equal to the dating frequency , the adjusting amplitude may exactly determine the voltage amplitude .

它能够较精确地计算电网电压的实际频率，提高移相延时时间测算的准确度。

The FFT can calculate the actual frequency of voltage and enhance the precision in calculating the time of closing or opening the AC electrical apparatus .

根据M3和M4HIP株系数推算，水稻HIP突变的实际频率可达0.1%左右。

Based on the number of HIP plant lines in M 3 and M 4 , it was estimated that HIP mutation frequency was around 0.1 % in rice .

根据上述参考值在2023名已婚群体中筛出81例阳性者，首次获得群体携带PKU致病基因（杂合子）的实际频率约为4%。

According to the limits of + 2s , 81 cases were screened out from the 2023 married people . It was the first time to get the actual heterozygote frequency of 4 % from population .

新的交流采样法的关键是要根据所测数据准确计算电网实际频率，因此本文提出了一种用于电网频率计算的方法。该方法简单可靠，实时性好。

The key problem in the new AC sampling method is the precise measurement of the signal frequency .

因此当数据长度小于信号周期时就无法计算出信号的实际频率。

For this reason , when the data length is less than that of the signal period , it is impossible to extract the actual frequency of the signal .

模式对月平均降水和极值降水的模拟结果主要集中在低值区，在降水低值区出现的频率远高于实际频率。

The simulation results of mean precipitation and extreme precipitation mainly concentrated in low value area in this model , and its ' frequency is much higher than the actual frequency .

本文基于高斯-牛顿法，在理论频率与实际频率残差平方和最小这一适线准则下，实现了三种极值分布参数的非线性估计。

Based on Gauss Newton method , this paper describes the nonlinear estimation of three types of the extreme value distribution with the principle of the least squares sum of deviation between estimated and empirical frequencies .

甚至在彻底不去了以后，人们也依然不愿承认自己去健身房的实际频率。不再去的人注销会员资格的时间，与他们最后一次去平均相隔2.3个月，也就是说他们花187美元买的服务根本没用过。

People remained in denial about their gym attendance even after they 'd stopped going entirely : On average , nonattending gym members did not cancel until 2.3 months after their last visit , paying for $ 187 worth of completely unused gym access .

该算法能够准确地得到信号的实际频率，并根据频率动态调整采样时间间隔，实现采样频率的自适应。由于减少了同步误差，从而降低频谱泄漏的影响。

By adjusting sampling time interval the frequency calculation , the algorithm can achieve sampling frequency self-adaptive , reduce synchronous error and the influence of spectral leakage , thereby can improve the accuracy of spectral analysis and harmonic measurement for power system signal which frequency change is slow .

加矩形窗截断后的自由衰减振动信号可以看成无限长谐波信号与单边指数函数及矩形窗的乘积，从理论上证明了其连续谱峰值点的频率和相位就是信号的实际频率和相位。

As response signal of damped free vibration could be considered as product of the harmonic wave and the unilateral exponential function and the rectangle window , that the peak frequency and phase are the frequency and phase of the harmonic wave signal is proved theoretically in this paper .

它可以显示ITU频率作为频道或者实际的频率。

It can show the ITU frequencies as channels or as the actual frequencies .

文章采用最小误差逼近算法计算韦布尔分布特征参数A和K，近似拟合风电场实际风速频率分布的韦布尔分布。

This paper presents a least error approach to calculate the main parameters A and K of Weibull distribution characteristic , and fits the actual wind speed frequency distribution in the wind farm with it .

经二分体和三分体的发生频率估算出的2n花粉频率与当年以花粉直径为指标测得的2n花粉的实际发生频率基本一致。

The frequency of 2n pollen production predicted by frequencies of dyads and triads agreed with that estimated by pollen diameters .

考虑实际风频率的渗风综合修正系数

The comprehensive correction coefficient of infiltration taking account of the actual wind frequency

这和实际的频率和规模几乎是一样的。

at pretty much realistic frequencies and scales .

仿真算例表明，优化算法识别精度高，抗噪声能力强，可用于实际复频率模态质量的识别。

Computer simulation examples verified its high identification accuracy , anti-noise ability and feasibility in practical use .

初步分析了稀疏率、填充因子、实际截止频率等因素对光学综合孔径望远镜成像的影响。

The influence of sparse ratio , fill factor , practical cut-off frequency on optical synthetic aperture telescope imaging is investigated .

设计了频率可调节的片上时钟产生电路，保证了能够准确测出被测电路实际工作频率。

To get the real frequency of the chip , an on-chip clock generation circuit is designed , the frequency of which can be adjusted .

学生课堂参与意愿和实际参与频率之间的差异显著，男女学生的参与频率有显著差异。

There is a significant difference between reported participation frequency and willingness , and the reported participation frequency shows a significant difference between male and female students .

当子孔径直径不变时，随着其所在圆半径的增大，实际截止频率先增大，然后减小。

When the pupil diameter is fixed , practical cut-off spatial frequency becomes larger first , and then reduces with the augmentation of the distance between pupils .

用有限元传递矩阵法分析火炮身管固有振动特性，矩阵阶次低，计算所得的固有频率与实际固有频率接近，误差在允许的范围内。

Matrix step is low by using the finite element transfer matrix method . Natural frequency by calculation approaches to actual natural frequency and the error is allowable .

以给药前神经元的放电频率为参照，计算给药后反应的相对值（给药后实际反应频率/给药前实际反应频率×100%）。

The discharge frequency of neurons before administration was taken as the reference , and the relative magnitude of response after administration was calculated ( response frequency after administration / response frequency before administration × 100 % ) .

由朝向修正系数和各朝向实际风频率组成相当风频率，对供暖冷风渗透耗热量计算中的单位门窗缝隙长度单位时间渗入室内的冷空气量进行了计算，得出了新的渗风综合修正系数。

Combining orientation correction factor with actual wind direction frequency arrives at an equivalent wind direction frequency . Obtains a new comprehensive correction coefficient after calculating the infiltration rate per meter gap of doors and windows and per unit time .

但是，另一方面，由于采取固定分配频谱制度，频率资源在时间、空间等方面存在不同程度的闲置，即使在一些比较拥挤的频段，实际的频率利用率也并不高。

However , the frequency resources have different degrees of idleness in time and space dimension because of the fixed spectrum allocation system , even in some more crowded bands , and the actual frequency utilization is not high ever .

同时，波高计和多谱勒激光测速仪的测量结果显示，当表面波的频率接近但低于射流振翅运动的自然频率时，射流振翅运动的实际振动频率将被锁定在表面波的频率上。

Using the wave height gauge and laser Doppler velocimetry ( LDV ), experimental results show that the jet flapping motions indeed lock in to the wave oscillations if the wave frequency is close to but lower than the nature frequency of jet flapping motion .

文中详细介绍了神经网络的分析原理及算法的实现过程。针对采样频率与实际基波频率异步的情况，提出一种基于神经网络模拟退火的谐波分析算法。

This paper describes the analysis of neural network theory and algorithm implementation process . A neural network method based on simulated annealing is proposed for harmonic analysis algorithm , this method is aimed at the system in which the sampling frequency cannot be locked on the actual fundamental frequency .

基于实际空间截止频率的稀疏孔径双圆周阵列的优化

Optical Sparse Aperture Double-Circle Array Optimization Based on Practical Cut-off Spatial Frequency

准确地测量叶片实际振动的频率和振幅已成为透平机械的一个重要研究方向。

Exact measurement for the actual vibration frequency of the blade was the focus .

这种影响是计算频率与实际测得频率有偏差的主要因素。

It is the main reason to cause the difference between predicted frequency and the measured .