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复幅度
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  complex magnitude
     A novel algorithm for real-time determination of power network frequency by using complex magnitude
     应用复幅度实时检测电网频率的新算法
短句来源
     Moreover frequency detection, the core of the third part, is analyzed in detail and based on the complex magnitude of harmonic signal, a novel algorithm for computing the frequency deviation in real-time is proposed.
     同时对稳态电能质量检测的核心——频率检测,作了详细的分析,并提出了一种新的适用于实时条件下的频率偏差检测算法——“基于复幅度的实时频率检测算法”。
短句来源
     Based on the complex magnitude of harmonic signals and under the condition of ideal synchronous samplings, an algorithm for computing the frequency deviation is proposed.
     在理想同步采样的条件下,提出了一种基于简谐信号复幅度的频率偏差求取算法。
短句来源
  complex amplitude
     A detection algorithm is derived to implement radar target detection through the Rao test with known Doppler frequency shift and unknown complex amplitude of the correlated noise,which is assumed as an autoregressive(AR) model.
     将相关噪声看作为AR模型,在未知信号复幅度而已知目标多普勒频移情况下,利用Rao检验方法实现了雷达目标检测。
短句来源
  相似匹配句对
     Complex Numbers
    
短句来源
     A novel algorithm for real-time determination of power network frequency by using complex magnitude
     应用幅度实时检测电网频率的新算法
短句来源
     Reconstruction of a complex-valued object function
     物体的恢
短句来源
     An Improved Complex Cepstrum Method of Minimum Phase Signal Reconstruction from Amplitude Spectrum
     由幅度谱恢最小相位信号的改进倒谱算法
短句来源
     Amplitude Weighting of Butler Matrix
     Butler阵的幅度加权
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  complex magnitude
In contrast, the AGC loop attempts to maintain the complex magnitude of the Costas arm-filter outputs to be unity on average.
      
In either case, the CWT enables new coherent multiscale signal processing algorithms that exploit the complex magnitude and phase.
      
  complex amplitude
A function of synchronous superposition of object complex amplitude reconstructed from N-step phase-shifting through one integral period (N-step phase-shifting function for short) was proposed.
      
In ideal conditions, the proposed method is a kind of synchronous superposition algorithm in which the complex amplitude is separated, measured and superposed.
      
A general nonlinear parabolic equation for the complex amplitude of excitation is derived by reduction of the Oregonator, the Field-Noyes model of the Belousov-Zhabotinskii reaction, with allowance made for diffusion.
      
A general nonlinear parabolic equation for the complex amplitude of excitation is derived by reduction of the Oregonator, the Field-Noyes model of the Belousov-Zhabotinskii reaction, with allowance made for diffusion.
      
The complex amplitude transmittance and reflectance are found for the entire multilayered structure from the calculated matrix elements.
      
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The computation of Green's function in spatial domain is the key difficulty in solving multilayer structure. According to the nonuniqueness of inverse problem, a novel method based on discrete complex image method(DCIM)-fixed real image method(FRIM) is put forward.According to this method, we use fixed images at real instead of complex locations to approximate the spectral Green's function, the images real locations are selected according to the classic image theory, and the complex amplitudes can be obtained...

The computation of Green's function in spatial domain is the key difficulty in solving multilayer structure. According to the nonuniqueness of inverse problem, a novel method based on discrete complex image method(DCIM)-fixed real image method(FRIM) is put forward.According to this method, we use fixed images at real instead of complex locations to approximate the spectral Green's function, the images real locations are selected according to the classic image theory, and the complex amplitudes can be obtained using simple point match method. This method is simpler and faster than the complex image method for avoiding the fitting procedure of Prony or GPOF. A group of computation results are given and validated by DCIM.

空域格林函数的求解是矩量法分析分层介质结构的主要困难 ,也是关键所在。在离散复镜像技术的基础上 ,注意到逆问题解的不唯一性 ,提出了一种新方法———固定实镜像法 (FRIM ) ,即在用一组空域复镜像 (表示为复指数级数和 )来拟合谱域格林函数时 ,根据经典镜像理论给定镜像的实位置 ,然后用简单的点匹配法来求出相应实镜像的复幅度。该方法避免了复镜像法中用Prony法或广义函数束法 (GPOF)拟合的复杂计算过程 ,提高了计算速度 ,且物理含义也更加明确。文中给出了该方法的基本原理 ,给出一组数值模拟结果 ,与复镜像法吻合得很好 ,证实了该方法的有效性

First, the reason for spectrum leakage and its influence to DFT used in frequency analysis is introduced. Based on the complex magnitude of harmonic signals and under the condition of ideal synchronous samplings, an algorithm for computing the frequency deviation is proposed. Second, this algorithm is further modified according to actual sampling and the power network signals. Finally, the iterative formulas for real-time determination of power network frequency are presented as well. Simulation results show...

First, the reason for spectrum leakage and its influence to DFT used in frequency analysis is introduced. Based on the complex magnitude of harmonic signals and under the condition of ideal synchronous samplings, an algorithm for computing the frequency deviation is proposed. Second, this algorithm is further modified according to actual sampling and the power network signals. Finally, the iterative formulas for real-time determination of power network frequency are presented as well. Simulation results show that the algorithm can follow up the frequency deviation accurately and quickly. Moreover, the algorithm will be of potential applications in the fields of AC real-time determination due to its features of less computation time, fast convergence and ability of against harmonic interference.

首先简要分析了频谱泄漏的成因和其对频率分析中DFT算法的影响。在理想同步采样的条件下,提出了一种基于简谐信号复幅度的频率偏差求取算法。再依据实际采样和电网信号的特点,修正了该算法,并得出了电网频率实时检测的迭代公式。仿真结果表明,该算法在非同步采样条件下能精确、快速地跟踪频率变化,且运算量小、收敛性好、抗谐波干扰能力强,在以交流电信号实时检测为基础的系统中有较强的应用价值。

A detection algorithm is derived to implement radar target detection through the Rao test with known Doppler frequency shift and unknown complex amplitude of the correlated noise,which is assumed as an autoregressive(AR) model.The unknown parameters are estimated by maximum likelihood estimation under hypothesis H_0.It is shown through computer simulations that the algorithms has almost the same performance as that of the GLRT,while the structure is simpler.The asymptotic performance of the algorithms is also...

A detection algorithm is derived to implement radar target detection through the Rao test with known Doppler frequency shift and unknown complex amplitude of the correlated noise,which is assumed as an autoregressive(AR) model.The unknown parameters are estimated by maximum likelihood estimation under hypothesis H_0.It is shown through computer simulations that the algorithms has almost the same performance as that of the GLRT,while the structure is simpler.The asymptotic performance of the algorithms is also given.

将相关噪声看作为AR模型,在未知信号复幅度而已知目标多普勒频移情况下,利用Rao检验方法实现了雷达目标检测。该算法只在H0假设条件下对未知参数进行最大似然估计,并通过计算机仿真了该检测算法的检测性能。仿真结果表明该检测算法的检测性能与GLRT算法性能相当,而结构则更为简单,同时文中也给出了该检测算法的渐近性能。

 
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