• Numerical analysis and simulations show that this algorithm reduces the computational complexity significantly for the estimation of large frequency offset while maintains a good performance.

    理论分析和仿真表明该算法在保证估计精度的同时,可显著降低大频偏估计的计算复杂度。

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  • Measuring for the beat error (frequency error) : Numerical display in milliseconds. Resolution is 0.1 milliseconds; the measuring range is 0-9.9 ms.

    偏振(频率错误)测量:数值以毫秒显示。分辨率是0.1毫秒,测量范围是0—9.9毫秒。

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  • Numerical methods were utilized to investigate the time-dependent flow patterns and the frequency characteristics of unsteady tip clearance flow in an axial-flow low-speed isolated compressor rotor.

    利用数值方法研究了某低速轴流孤立压气机转子中非定常叶顶间隙流的流动特征和频率特性。

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  • This paper on the basis of high order mathematic model, described the frequency bifurcation phenomenon, and used numerical method to bound the bifurcate region of parameter.

    本文从非接触电能传输系统的高阶数学模型出发,描述了频率分叉现象,并且用数值方法界定了分叉区域。

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  • Transmission parameters such as numerical aperture and normalized frequency of the fabricated holey fibers have been measured and compared with theoretical values based on effective index method.

    测量了拉制成的有孔光纤的数值孔径和归一化频率等传输参数,并基于有效折射率方法与理论值进行了比较。

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  • The influence of bias current and modulation frequency on chaos dynamics of vertical-cavity surface-emitting laser (VCSEL) subject to direct current modulation is investigated by numerical simulation.

    利用数值模拟的方法研究了电流调制下偏置电流和调制频率对垂直腔面发射半导体激光器(VCSEL)混沌动力学特性的影响。

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  • The numerical results on the frequency are given, the results predicted by the improved and the classical theories are compared.

    文中给出了频率的数值结果,对由厚壳理论和经典理论所预示的结果进行了比较。

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  • By using a numerical method, the effect of changing in magnetic field upon vibration frequency and coefficient of reduction is presented.

    最后给出数值结果,表明磁场的变化对振动频率及衰减系数的影响。

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  • An algorithm for power system frequency measurement based on numerical differentiation and central Lagrange interpolation is presented.

    提出了一种基于数字微分和拉格朗日插值的系统频率快速而准确的测量算法。

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  • The kinetic parameters in the models, including pseudo activation energy and apparent frequency factor were obtained by using Monte Carlo numerical calculation method.

    利用随机试验法等数值计算方法求得了模型中的表观活化能和视频率因子等动力学参数。

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  • A numerical simulation approach analyzing electromagnetic characteristics for dielectric-loaded double-layer frequency selective surfaces (FSS) with dissimilar lattice geometries is presented.

    给出了一种分析有介质加载的不同栅格外形双层频率选择表面电磁特性的数值模拟方法。

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  • Steady-state probability, frequency and duration are the three main indices in reliability evaluation of the HVDC systems. Generally, they are solved by numerical methods.

    稳态概率、状态频率和持续时间是高压直流系统可靠性评估中的三个主要可靠性指标,一般用数值方法求解。

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  • The regular numerical algorithm is MOM, whose general impedance matrix has a large condition number at the resonance frequency points, which brings an inaccurate result.

    常规散射特性计算方法如矩量法中的广义阻抗矩阵在谐振频率点上条件数过大,导致计算不准确。

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  • First of all, the response and force on a fixed cylinder in open sea can be solved using the numerical program in time domain, the result fits in with the frequency value well.

    首先,本文应用高阶边界元数值程序在时域内求解开敝水域中固定圆柱的运动响应和受力大小,并与频域计算结果进行对比,结果符合良好。

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  • As for the numerical simulation by traditional power system component models and parameters, the obtained dynamic frequency curves evidently diverge from measured ones.

    采用常规的电力系统元件模型和参数进行数值仿真所得的频率变化曲线与实测曲线偏差较大。

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  • Based on element local frequency change ratio method and element modal strain energy ratio method, numerical study is carried on to detect the damage of the bridge.

    利用单元局部频率变化率法和单元模态应变能比法,对连续梁桥进行了损伤诊断的数值模拟研究。

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  • The amplitude frequency response curves and their frequency properties of the parametric resonances are investigated by using the method of numerical analysis.

    用数值方法分析了各种参数共振的响应曲线,其存在区域以及响应频率与脉动流频率之间的关系。

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  • The severe numerical instability in complex frequency modal mass identification from frequency response function makes it difficult to identify physical parameters.

    利用频响函数识别复频率模态质量存在着严重的数值计算不稳定性,给物理参数的识别造成困难。

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  • The possibility of chaos in S. cerevisiae culture system in CSTR was investigated by means of numerical computation under fixing the amplitude A and changing the frequency w of forced impulse.

    以全混釜中酵母培养系统为对象,固定外加激励振幅值,改变激励频率,运用数值方法研究了强迫激励下乙醇连续发酵系统中存在混沌的可能性。

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  • 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。

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  • The numerical relationship between range-profile's distortion and frequency is analyzed.

    分析了目标像的失真与频率的数值关系。

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  • It is analyzed by numerical computation that the temporal growth rates and the frequency of PASOTRON are affected by the filling factor of plasma.

    并通过数值计算分析了等离子体填充因子对PASOTRON的时间增长率及工作频率的影响。

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  • The method of digit fast sine sweep frequency is used in nonlinear suspention system frequency feature numerical solution.

    本文针对非线性悬架,研究通过数字快速正弦扫频获得其频域特性的数值解的方法。

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  • The results show that the non-linearity is mainly attributed to a thermal fluctuation magnetic after effect and a numerical variation of the magnetic domain with frequency.

    结果表明,非线性主要来源于热起伏磁后效和为了降低微涡流损耗而引起的磁畴数随频率的变化。

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  • The frequency degree of being visualized was determined by using the land utilization map, numerical model of topography and the incident angle of sight.

    通过地形及土地利用图、数值地形模型和视线入射角来确定景观的被视频度;

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  • Synthetic aperture radiometer applies the interferometric principle to sample in the spatial frequency domain and retrieves the image by Fourier or other numerical transformation.

    综合孔径辐射计利用孔径综合原理在空间频率域中采样,通过傅立叶变换或其他数学变换获取反演亮温图像。

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  • A concept and a numerical formula of flowing velocity on many blades are presented to discuss noise in the discrete frequency.

    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。

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  • The numerical results indicate that the higher-order mass matrices have a negligible influence on the fundamental frequency, but they affect the frequencies of higher mode vibrations considerably.

    数值实验结果表明:高阶质量矩阵对横向振动基频及低频的影响可忽略不计,但它们对高阶横向振动频率有很大的影响。

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  • With numerical calculation from single mode rate equation of semiconductor laser, the output pulse parameters in time and frequency domains are investigated under different gain switching conditions.

    从激光器的单模速率方程出发,利用数值方法研究了在不同的增益开关状态下,输出光脉冲的时域及频域特性。

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  • In regard to the excitation experiments, time-Accurate numerical stimulation was carried out to investigate the upstream disturbance frequency effect under different incidence in an annular cascade.

    针对某静止环形叶栅的激励实验工作,相应的对扩压叶栅进行了不同气流攻角和激励频率的非定常粘性计算与流场分析。

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