设计了一种离散频率的PF M控制方式。
A pulse frequency modulation (PFM) with discrete frequency is designed.
介绍了用于感应电机起动的离散频率控制方法。
A discrete frequency control method is proposed for thyristorized static switch.
介绍了一种基于离散频率原理的电机软启动控制方法。
A kind of induction motor soft start control method based on discrete frequency principle is introduced.
对声激励的高能量区、燃烧噪声主峰以及一些重要的离散频率分量进行了分析和识别。
The high energy range of acoustic excitation, the peaks of combustion noise and major discrete frequencies are identified.
为探索冲击射流离散频率噪声的产生机理，系统地研究了冲击射流离散频率噪声的特性。
In the study of flow oscillation and discrete frequency noise of impinging jet, it is found that there is a critical pressure ratio for a given nozzle and a nozzle-to-plate distance.
对上述离散频率的电感值利用三次样条函数插值，得到整个频率范围内电感的变化曲线。
A cubic spline interpolation between inductances at low and high frequency gives a good result over the entire frequency range.
将三种单一离散频率叠加起来可以形成一个更加不规律的组合，傅立叶变换提供了一种将信号分解成各自频率成分的方法。
Summing together only three discrete frequencies can produce a much more erratic composite. The Fourier transform provides a way to decompose signals into their constituent frequencies.
最常见的数字信号处理技术之一是离散傅立叶变换（DFT），它把一个信号分解成它的组成频率，并表示成一个矩阵。
One of the most common digital-signal-processing techniques is the discrete Fourier transform (DFT), which breaks a signal into its component frequencies and can be represented as a matrix.
伴随这些脉冲的是很多离散光，被称为“频率梳”。
Within these pulses are a number of discrete colours of light in what is known as a "frequency comb".
它将问题分解开来，转变成离散的数据位，然后在它庞大的数据库中搜索与所处理的数据位在统计上频率最高的重合。
It decomposes the question put to it into discrete bits of data and then searches its vast data base for statistically frequent combinations of the bits it is working with.
复杂而有针对性的先进持续威胁的警报频率，进一步加重了整个过程和离散行业的安全参数。
The alarming frequency of sophisticated and targeted advanced persistent threats has given further weight to the safety argument across both process and discrete industries.
用切片理论来计算双体船流体动力系数时，在一些离散的频率上出现了共振。
Resonance would happen at some discrete frequencies on applying the strip theory to the calculation of hydrodynamic coefficients of catamarans.
对于离散卷积方程组，一般采用傅氏变换的方法求解，但在某些特定系数的情况下，零频率丢失。
For discrete convolution equation set, generally, people use Fourier transform method to solve. But in some positions, zero frequency will lose.
本文采用离散理论求得索桁架的振动方程，进一步可求得在随机风荷载作用下索桁架结构的振动频率及其位移响应。
This paper has worked out the vibration equation of cable truss by treating it as a discrete system and solved the vibration frequency and the displacement responses under stochastic wind loading.
介绍了利用快速富里叶变换(FFT)计算离散数学模型频率特性的方法。
A method of using fast Fourier transformation (FFT) to calculate the frequency characteristics of discrete mathematical model is introduced.
对线加速度计辅助惯性姿态角测量的误差分析表明，测量误差由加速度计噪声、二次积分离散化、信标噪声和加速度计频率特性误差组成。
The error analysis shows that the measurement error is caused by the noise of the accelerometer, discrete double integration, noise of beacon and frequency characteristic error.
根据本征频率计算了石英音叉的动态等效电路参数，计算值在实测值的离散范围内。
Based on the inherent frequencies the dynamic equivalent circuit parameters are calculated and the result is within the discrete range of experimental values.
最后由积分方程的离散化方程组有非平凡解的条件，求得固有频率。
Finally, natural frequency is obtained by the existence condition of nontrivial solution of the discrete algebraic equations derived from the integral equations.
由于这个积分器使正常转折频率增加一倍，并使高频离散积分器误差减少到最低限度，所以它对高频应用是理想的。
This integrator is ideal for high-frequency applications because itdoubles the normal folding frequency and minimises high-frequency discrete integrator errors.
频率合成器是一种频率稳定度较高的离散间隔型频率信号发生器，广泛应用在通信、雷达、仪器仪表及导航系统中。
The frequency synthesizer is a kind of discrete frequency singal generator with high stability, and it is widely used in communication, radar, apparatus and navigation system.
这种算法是采用了均值量化的方法，把数字水印嵌入图像的离散小波域，可以检测在空间域和频率域的图像失真。
The watermark was embedded in the wavelet domain using the mean quantization method. This method can be used to detect the distortion both in spatial and frequency domain.
本文运用三维有限元方法离散水体，研究了箱形术体的自振频率及动水压力振型。
In this paper, the natural frequencies and modes of box water body researched by using three-dimensional finite element method.
本文利用数字梯形滤波器的设计原理，以离散微分器作为积木块，利用频率变换方法，设计出数字LDD梯形高通滤波器。
Based on the design fundamental of digital LDI ladder filter, a digital LDD ladder high-pass filter is designed by using the frequency transformation in this paper.
提出了一种等式到达条件下的离散变结构组合控制策略，设计了基于该控制策略的负载频率控制器。
A discrete variable structure composite control strategy which use an equality form of the reaching condition is proposed and applied to design the load_frequency controller.
为了讨论离散性频率噪声，本文提出了多叶叶道流速激发的概念和计算公式。
A concept and a numerical formula of flowing velocity on many blades are presented to discuss noise in the discrete frequency.
在讨论了连续信号循环频率的支撑区及循环矩支撑区的基础之上，给出了连续信号在时间离散化时不发生混迭的条件；
The supports of continuous-time signal's cyclic frequency and cyclic moment spectra are discussed, and the nonaliasing constraints have been established and discussed.
数值计算结果表明，随时间抖动范围增大和频率提高，离散功率谱分量所占比例下降。
The numerical results demonstrate that the larger the zone of timing jitter and the higher the frequency, the less proportion the discrete PSD component is in the total PSD.
扫描探针显微镜- d21提供自动频率，相位和电压匹配使用模拟或离散输出信号。
The SPM-D21 provides automatic frequency, phase and voltage matching using either analog or discrete output signals.
扫描探针显微镜- d21提供自动频率，相位和电压匹配使用模拟或离散输出信号。
The SPM-D21 provides automatic frequency, phase and voltage matching using either analog or discrete output signals.
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