ID 原文 译文
40236 最后通过分时保存、维护算法的归一化因子以降低算法计算复杂度。 Finally, the normalized factor of the algorithm is calculated and maintained piecewisely to save computation.
40237 通过提高W1(k）的收敛速度，新算法可以更少的迭代次数获得稳定的延时估计，从而提高DFS的整体收敛速度。 By increasing the convergence of the W1(k), the proposed algorithm requires less adaptations to achieve a delay estimation of the adaptive system, and the overall convergence of the DFS is eventually improved with the proposed algorithm.
40238 以回声消除为应用背景对新算法进行实验仿真，实验结果表明新算法性能显著优于其他传统的自适应算法。 The simulation results in the context of echo cancellation indicate that compared with other traditional adaptive algorithms, the proposed algorithm is found to be more efficient in sparse system identification.
40239 分析了高速数据采集系统对采样时钟抖动的要求，给出了时钟相位噪声和时钟抖动的转换关系； This paper analyzes the requirement of sampling clock jitter of high sampling rate and high resolution data acquisition system(DAQ), and gives the relationship between clock phase noise and clock jitter.
40240 采用HITTITE的HMC1035LP6GE频率综合芯片作为主芯片，设计了时钟生成电路，2 500 MHz输出时钟抖动测量值90 fs（整数工作模式，输入频率100 MHz，鉴相频率100 MHz，环路滤波带宽127kHz，积分区间[10 kHz，10 MHz]）。 The HMC1035 LP6 GE frequency synthesizer chip is used as the main chip of the clock generation circuit with output clock jitter measured as 90 fs(integer mode, 2 500 MHz output frequency, 100 MHz input frequency, phase detector frequency 100 MHz, loop filter bandwidth 127 kHz, integral interval[10 kHz, 10 MHz]).
40241 对比时钟生成电路在各种工作模式下的性能，给出了对应的设计指南。 The performance of the circuit in various working conditions is compared, and the corresponding design guidelines are given.
40242 在利用Lamb波进行板状结构损伤检测时，采用经典最小功率无畸变波束形成算法可以获得较高的损伤成像精度，但仍无法避免频散效应对成像精度的影响， When using Lamb waves to detect the damage of the plate structures, the classic minimum power distortion beamforming algorithm can obtain good damage imaging accuracy, but it still can not avoid the influence of dispersion effect on the imaging accuracy.
40243 且该算法存在谱矩阵求逆运算复杂、奇异谱矩阵无法求逆等缺陷，显著降低计算效率。 And this algorithm has shortcomings such as complex spectral matrix inversion operation and inability to invert singular spectral matrix, which may reduce computing efficiency significantly.
40244 为解决上述问题，本文提出了更适用于Lamb波检测的改进型最小功率无畸变波束形成算法。 In order to solve the above problems, this paper proposes an improved minimum power distortion beamforming algorithm that is more suitable for Lamb waves detection.
40245 该算法在频域进行波束形成以解决频散对成像的影响，并结合最小二乘递推法与对角加载法来进行谱矩阵求逆，以提高计算效率。 The proposed algorithm performs beamforming in the frequency domain to solve the dispersion effect on imaging result, meanwhile combines the least square recursion method and the diagonal loading method to invert the spectral matrix to improve computational efficiency.