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频率域     
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  frequency domain
     The method of finite difference of high precision elastic wave equations in the frequency domain and wave-field simulation
     高精度频率域弹性波方程有限差分方法及波场模拟
短句来源
     The Model of Time Domain and Frequency Domain in the Linear Control System
     线性控制系统的时间域与频率域模型
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     Study on multi-watermark coexistence technology in the frequency domain of digital images
     数字图像频率域多水印共存技术研究
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     AN OPTIMIZATION INVERSION METHOD FOR TWO DIMENSIONAL MAGNETIC ANOMALY IN FREQUENCY DOMAIN
     二维磁异常频率域最优化反演方法
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     Research on Digital Image Watermarking Algorithm and Its Realization Based on Frequency Domain
     基于频率域的数字图像水印算法的研究和实现
短句来源
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  frequency-domain
     Based on the model reduction theory in frequency-domain,two predictive PI(D) controller design methods for high order processes with time-delay are proposed.
     利用频率域模型降阶理论,提出了高阶时滞对象的预测PI(D)控制器两种设计方法.
短句来源
     A FREQUENCY-DOMAIN INTERPRETATION METHOD OF REFLECTION WAVE FROM SINGLE INTERFACE
     单界面反射的反射波法频率域解释方法的研究
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     Solution to Seismic Wave Equations by Frequency-domain Boundary Element Approach
     地震波方程频率域边界元法
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     Frequency-domain solution of shear stress along pile-soil interface for longitudinal vibration of piles and its application
     纵向振动桩侧壁切应力频率域解及其应用
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     A Frequency-Domain Synthesis Method of the Finite Memorial Optimum Linear System
     有限记忆最佳线性系统的频率域综合方法
短句来源
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  frequency domains
     Combinational Image Watermarking in the Spatialand Frequency Domains
     空间域和频率域相结合的数字水印
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     The conventional method to calculate the thicknesses is implemented in time or frequency domains, mainly using single parameter.
     常规计算薄层厚度的方法是在时间域或频率域实现,主要使用单参数计算。
短句来源
     Based on 3-D high-precision seismic data in northwest part of Be'er sag, Haila'er basin and through analyses of seismic attributes in time and frequency domains, the paper studied the variation and distributing law of channel sand bodies and summarized a set of approaches using seismic attributes in time and frequency domains to identify the palaeochannel.
     本文基于海拉尔盆地贝尔凹陷西北部高精度三维地震资料,通过对时间域、频率域地震属性的分析,研究了河道砂体的变化及分布规律,总结出了一套利用时间域、频率域地震属性识别古河道的方法。
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     Theoretical calculate and real data processing show the method can depress noise in both time and frequency domains, spread out the effective frequency band, and improve the resolution factor.
     理论数据和实际资料处理结果表明 ,将这种方法用于时间域和频率域的去噪均能起到压制噪声的效果 ,有利于展宽有效频带 ,提高分辨率。
短句来源
     Based on the characters of field geophone array, analysis of data of single digital geophone receiving (5m group interval) and indoor array in Tongkou work area, the paper considered: ①Different interference waves have different distribution features in time and frequency domains, small group interval is of advantage for separation and suppression of interference waves and large group interval is difficult to separate the signal from noise.
     文中根据野外检波器组合的特点,对同口工区数字检波器单道(5m道距)接收、室内组合的资料分析后认为:①不同干扰波在时间域及频率域有着不同的分布特征,小道距有利于干扰波的分离和压制,大道距使信、噪分离困难。
短句来源
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  frequency field
     MIMO_TURBO_STBC_OFDM system can realize multidimensional processing of space field、time field and frequency field,if the three techniques of MIMO_STBC、TURBO and OFDM can be conbined,they will compose a concatenation transmission scheme with good performance,the paper simulate this scheme,simulation results show that the system can have better performance.
     MIMO_TURBO_STBC_OFDM系统可实现空间域、时间域及频率域的优化组合多维处理,这三种技术MIMO_STBC、TURBO和OFDM的有机联手、级联运作,构成一种“强强联手、互补增强”的更优秀的级联传输方案,本文就这种方案的系统性能进行了仿真,仿真结果表明:此系统能获得相当大的性能提升。
短句来源
     How to improve the derivation accuracy of frequency field is proposed and a new derivation method with higher accuracy suitable for potential field data is introduced in this paper.
     更由于求导本身固有的敏感性,这是一个计算方法上的棘手问题,也是很多兄弟单位没有解决的问题,本文提出如何改善频率域求导的精变,同时介绍一种适用于位场数据的空间域高精度求导方法。
短句来源
     Research on the performance of cotton carder autoleveller in frequency field
     清梳联自调匀整系统频率域性能的研究
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     Fourthly, the market quotation records are transformed from time field to frequency field by FFT algorithm, the comparability is measured in frequency field.
     4.采用快速傅立叶变换(FFT)方法,实现交易行情信号从时间域向频率域的转换,并在频率域对相似性进行度量,用股票行情记录对该方法的有效性进行测试。
短句来源
     THE FREQUENCY FIELD SEPARATION TECHNIQUE OF GRAVITY ANOMALIES AND ITS APPLICATION
     重力异常频率域分离方法及应用
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  frequency domain
We present an explicit, straightforward construction of smooth integrable functions with prescribed gaps around the origin in both time and frequency domain.
      
The frequency domain method and the multiplier technique are used.
      
The frequency domain method and the multiplier technique are applied.
      
In this paper, the acoustic leak signal is analyzed in the time-frequency domain.
      
Consideration was given to the transformations of speech in the frequency domain which precede extraction of the informative attributes of phonemes.
      
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  frequency-domain
Frequency-Domain Bounds for Nonnegative, Unsharply Band-Limited Functions
      
In this paper we give a further investigation of the method introduced by the author in [1, Frequency-domain bounds for nonnegative unsharply band-limited functions] for proving bounds for functions with nonnegative Fourier transforms.
      
The discrete spectrum of the field after continuation is obtained from difference methods for Maxwell's curl equations in frequency-domain, and the time domain solution of the original problem is derived from their inverse Fourier transform.
      
Different types of tomography, such as continuous wave (CW), frequency-domain (FD), and time-domain (TD) tomography, allow fluorescence imaging of tumors located deep in human or animal tissue.
      
A recursive algorithm for the two-stage empirical frequency-domain optimal parameter (EFOP) estimation method was proposed.
      
更多          
  frequency domains
There are two capacitances in high-and medium-frequency domains and one inductive loop or component in low-frequency domain.
      
A comparison of the results obtained in the time and frequency domains gives evidence that the energies of thermal and coherent phonons coincide, while their dephasing and energy relaxation times are different.
      
For an intense laser field, there are frequency domains of either constructive or destructive self-interference of inelastically scattered photons.
      
Dispersion relations for the surface wave are derived for different field polarizations, and the frequency domains where this wave may exist are found.
      
A method utilizing single channel recordings to blindly separate the multicomponents overlapped in time and frequency domains is proposed in this paper.
      
更多          
  frequency field
Study of energy dissipation in a suspension of particles with magnetic hysteresis in alternating supercritical-frequency field
      
Stability of a circular cylindrical configuration of liquid metal supported by a high-frequency field
      
In the present paper, it is shown that a plane-polarized high-frequency field effectively stabilizes part of the spectrum of three-dimensional perturbations of an interface but does not completely suppress the Rayleigh-Taylor instability mechanism.
      
Influence of a high-frequency field on the formation of photosensitive thin-film materials synthesized by the sol-gel method
      
The sample to be investigated is heated in a high-frequency field of a multiturn cylindrical inductor in an air/argon mixture in a hermetically sealed volume with a volume content of air of 6.2%.
      
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