It is convenient to use frequency domain methods to deal with flight test data.
在飞机飞行试验的数据处理过程中，采用频域方法是比较方便的。
Both types have their own advantages: frequency domain methods have strong robustness, while spatial domain methods have higher accuracy.
这两种方法各有特点：频率域法的鲁棒性强，而空间域方法相对精确度更高。
Via frequency domain methods, the problem of stabilization by output feedback based on observer for linear system with multiple delays was discussed.
针对线性多时滞系统，利用频域法研究了线性多时滞系统基于观测器的输出反馈镇定控制问题。
Because there are many nonlinear factors in a real automobile, a nonlinear vibration model should be necessarily used. In this case, the frequency domain methods can not be applicable.
实际汽车存在许多非线性环节，需采用非线性振动模型进行研究，在这种情况下，通常采用的频域分析方法一般不再适用。
The traditional time and frequency domain methods of vibration signals of gear box fault are introduced in this paper. And meanwhile this paper lists different applied fault analysis means.
介绍了齿轮箱故障振动信号传统的时域、频域分析方法，并列举了一些不同故障所应用的分析方法。
We further propose a possible fast hybrid fractal encoding algorithm which combines existing fast search methods, statistical normalization and frequency domain comparison.
接着进一步提出一种可能的快速混合分形编码的算法，该算法将快速搜索方法、统计规范化、频域比较结合起来。
Then the time domain analysis methods and frequency domain analysis methods which are frequently used for fault diagnosis have been discussed.
其次论述了常用的故障诊断方法，即时域分析方法和频域分析方法。
Sonic loading is a high frequency, broadband random process. Basic cycle counting methods, which are prevalently used in time domain, are difficult to be applied.
噪声载荷是一种高频、宽带随机载荷，在低循环疲劳寿命预测中被广泛采用的时域计数法很难直接利用。
Methods of analyzing the dynamic performance of automatic control system can include time domain analysis, frequency domain analysis and stability.
自动控制系统的动态性能的分析方法包括时域分析法，频域分析法，及稳定性判据。
The methods of parameters identification are analyzed and low-order equivalent system is identified by frequency domain maximum likelihood method and least square method.
分析了等效系统参数辨识方法，采用最小二乘法与频域极大似然法求解先进飞机的低阶等效系统。
Fourier transformation in time domain and frequency domain is one of the main methods for modern railway signal detection.
时域分析和傅氏变换的频域分析方法是现代铁路信号检测的主要方法之一。
Purely algebraic methods for computing the sensitivity of linear algebraic system have been proven to be simple and effective in the frequency domain.
在频域灵敏度分析中，利用计算线性代数系统的偏导数的纯代数方法是简单和有效的。
The modern radar jamming and antijamming technology from airspace frequency domain and time domain, are introduced, and the methods despoiling information authority in modern war are analyzed.
分别从空域、频域、时域介绍了现代雷达干扰和抗干扰技术，分析了现代战争中夺取信息权的一些手段和方法。
The time domain integral equation (TDIE) method is one of the important methods in electromagnetic numerical simulations for several advantages over conventional method in frequency domain.
相对于频域方法而言，时域积分方程法有这许多优势，因此，它是计算电磁学数值方法中一个重要的方法。
Methods Owing to the shortcomings of the traditional digital watermark techniques, analyze the frequency domain watermark algorithm, propose a new digital watermark method.
方法针对传统数字水印技术的有限性，通过对频域数字水印算法进行分析，提出了一种新的数字水印算法。
The current widely used methods of seismic response analysis for soil layers in engineering are equivalent linearization frequency domain method which is based on FFT and iterative method.
工程上广泛应用的现行土层地震反应分析方法即为借助快速傅里叶变换和迭代法的等效线性化频域方法。
The methods of channel measurement were overviewed and the complete schemes in time domain and frequency domain were proposed for establishing measurement system for indoor channels.
针对建立室内信道测量系统的需要，总结了信道测量的各类方法，提出了室内信道时域和频域测量的完整的系统方案。
Based on the assumption of hysteretic damping, seismic response of soil layer was analyzed by using the methods of time domain and frequency domain separately.
采用滞后阻尼假定，分别应用时域和频域分析方法对土层的地震反应进行计算。
This paper gives the method about modeling, rectifying and simulating in the frequency domain, and proves the feasibility of these methods through a series of examples.
基于时频变换原理，给出了频域建模、频域校正及频域仿真的方法，通过实例验证了这些方法的可行性。
This paper indicates the normal testing methods of time domain frequency stability, and focal points out the testing methods of time domain frequency stability with modulation domain analysis.
介绍了时域频率稳定性常用的测量方法，并重点介绍了利用调制域分析仪实现时域频率稳定性的测量方法。
The methods for analyzing the line antenna and antenna array are mostly in the frequency domain.
本文针对线天线及天线阵的频域分析方法的缺点。
About theoretic calculation for lightning electromagnetic field, two analytical methods are raised, which are dipole method in time domain and time-varying field method in frequency domain.
在雷电电磁场的理论计算方面，提出了两种方法，即时域中的偶极子方法和频域中的时变场方法。
These frequency domain processing methods yield reasonable and consistent slowness estimations.
这三种频率域处理方法提取得到了合理的、一致的慢度结果。
Contrasted with the methods in time space domain, this one has high computation efficiency and is prone to image, because all its computation is in frequency space domain.
当在频率-空间域进行计算时，相对于纯粹的时间-空间域有限差分算法有计算效率高、成像方便的优点。
Many methods have been proposed to employ deconvolution in frequency as well as in time domain.
已经有许多方法在频率和时间域采用反褶积方法。
It can be classified into two methods of measurements: the time domain measurement and the frequency domain measurement.
某些毫秒级以上的频率变化，只有时域测量才能实现。
At present, the far-zone apparent resistivity definition is usually used in the frequency domain electromagnetic methods.
目前在频率域电磁法中常常采用远区视电阻率定义。
Firstly, we introduce the radar equation of weather radar, the basic principles of detection weather targets, the time and frequency domain properties of weather radar echo and its simulation methods.
首先简要介绍了气象雷达的雷达方程、气象雷达探测气象目标的基本原理、气象目标回波的时域频域特性和气象回波信号的模拟方法。
This paper discusses the application methods on solving frequency function and sets examples, in the two integral characters of time domain on Fourier conversion.
该文讨论傅氏变换中的二个时域积分特性，在求解频谱函数中的应用方法，并举例予以说明。
By using the plane wave expansion and finite-different time-domain (FDTD) methods, we can find a larger absolute band gap in the low and high frequency.
通过运用平面波展开方法以及有限差分时域(FDTD)方法进行分析，可以明显地发现，在低频和高频区域增大了光子晶体的光子禁带。
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