Structural damage is rapidly detected by monitoring the frequency migration of the corresponding point on the intact and damage structure.
通过监测损伤结构频率对完好结构相应点的偏移，快速检测结构的损伤。
In stepped frequency radar, the velocity of targets must be estimated and compensated to eliminate the range migration and distortion due to target moving.
步进频率雷达中，目标的径向运动将导致合成的目标径向一维距离像产生距离徙动和波形失真，需要对目标速度进行估计以补偿其影响。
Those parameters include the number of subpopulations, migration frequency, migration rates, migration selection strategies and the communication styles, etc.
这些参数包括：子种群数目、迁移率、迁移规模、迁移选择策略和通信方式等。
The main parameters that effect horizontal resolution of migration imaging were identified as medium velocity, dominant frequency of seismic wavelet and aperture Angle of migration processing.
结果表明，影响偏移成像水平分辨率的主要参数是介质速度、地震子波主频和偏移处理的孔径角。
The finite difference depth migration equation in space-frequency domain can be derived when the radical expression is approximated by continued fraction.
采用连分式近似，可以得到空间频率域的有限差分深度偏移方程。
Simultaneously, a migration imaging technique using the whole MT observed frequency bands information was realized.
同时实现了可包含所有观测频率信息的全频段MT偏移成像技术。
BP algorithm replaces the concept of phase with delay time, so it is irrelevant to frequency and the problem of range migration correction does not exist.
BP算法由于用时延代替了相位的概念，故与频率无关，不存在距离徙动校正的问题。
Results and Conclusion: The results show that the length of DNA migration and the frequency of tailed cells increase, and the dose-effect relation is obvious.
结果与结论：结果表明：在硫芥的作用下细胞DNA的迁移率和迁移长度增加，且呈显著剂量效应关系。
The algorithm completes range migration correction through correcting the linearity Doppler frequency line. It can avoid one time inserting processing and reduce calculation.
该算法通过对具有线性的多普勒谱线进行校正来完成距离迁移校正，避免了一次插值运算，减少了运算量。
According to the moving target's echo characteristics acquired by the frequency-modulated stepping radar, the envelope migration is firstly carried out for the subset of the compressed pulse.
根据调频步进雷达运动目标的回波特性，首先对压缩后的子脉冲进行包络平移。
The depth migration with higher-order approximation by time-shift algorithm eliminates the frequency dispersion and amplitude distortion in the calculation process.
本文使用高阶方程深度偏移方法，并且在计算中采用了一种与差分运算等价的时移法解决了计算中出现的频散和振幅失真问题。
Then two conventional envelope migration compensation algorithm was introduced, on this basis, a new algorithm called frequency domain correction was proposed.
接着介绍了两种常规的包络走动补偿算法，在此基础上提出了一种新的算法称之为基于频域校正的包络补偿算法。
A new method which using two order keystone transform to correct quadratic migration and frequency domain correction to correct once migration was proposed.
提出了一种新的解决方法，即利用二阶keystone变换补偿时间二次项，然后用频域校正算法补偿时间一次项。
Formulas for 3d migration of seismic data in frequency-wave number domain are derived. The software and procedure used on medium -sized computer and minicomputer are given.
在频率-波数域中，详细地推导出了对地震记录进行三维偏移归位的全部计算公式，并给出了能在中小型计算机上实施的程序结构和流程。
Low penetration as well as drilling incidents of high frequency resulted from problems caused by leakage, gas migration, collapsing sticking, well kick, blowout and so forth.
且常发生井漏、气侵、坍塌性卡钻、井涌与井喷等井下复杂问题，导致机械钻速低与钻井事故频发。
Low penetration as well as drilling incidents of high frequency resulted from problems caused by leakage, gas migration, collapsing sticking, well kick, blowout and so forth.
且常发生井漏、气侵、坍塌性卡钻、井涌与井喷等井下复杂问题，导致机械钻速低与钻井事故频发。
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