ID 原文 译文
23435 同步压缩变换建立在小波变换的基础上，通过在较小频域范围内压缩小波系数，可有效改善信号的能量分布，提高时频聚集性。 SynchroSqueezing Transform (SST), based on the wavelet transform, can effectively improve the energy distribution and time-frequency aggregation of a signal by compressing the wavelet coefficients in a short frequency domain.
23436 该文针对线性调频(LFM)信号的参数估计问题，根据适用于 LFM 信号的 Chirplet 变换，在同步压缩理论的框架下，提出一种同步压缩 Chirplet 变换方法(SSCT)。 To solve the parameter estimation problem of Linear Frequency Modulation (LFM) signals, a new SynchroSqueezing Chirplet Transform (SSCT) is proposed within the framework of synchrosqueezing.
23437 由于充分利用了 LFM 信号时间与频率的线性关系，SSCT 方法在提高 Chirplet 变换时频平面能量聚集性的同时，可实现信号参数的精确估计，且保留了Chirplet 变换窗函数选取灵活，无交叉项干扰等优点。 Taking full use of the linear relationship between the time and the frequency of an LFM signal, the SSCT method can improve the energy density on the time-frequency plane and estimate the signal parameters accurately, which at the same time keeps the advantages of the chirplet transform, such as flexible window function selecting and no cross-term interfering.
23438 针对复杂噪声环境下的参数估计问题，进一步提出分数低阶SSCT 方法(FLOSSCT)。 Then a Fractional Lower Order SSCT (FLOSSCT) method is proposed in order to estimate the parameters of an LFM signal in the complex noise environment.
23439 仿真结果表明，在高斯噪声以及脉冲性更强的α稳定分布噪声背景下，该方法可有效实现 LFM 信号的参数提取，具有较好的鲁棒性。 The simulation results show that the SSCT and the FLOSSCT have good performance under the background of Gaussian and impulsive noise, respectively.
23440 该文以含励磁环节的分数阶四阶电力系统模型为对象，研究其动力学行为并加以同步控制。 Based on the four-order power system model, a fractional-order power system model with excitation model is presented in this paper and the dynamic properties of the fractional-order system are investigated and controlled.
23441 首先，固定系统参数，利用分岔图和最大 Lyapunov 指数谱计算系统产生混沌振荡的最低阶次。 Firstly, the fractional-order power system of 4D is given and then the minimum order for existence of chaotic oscillation in power system with fixed parameters is achieved through bifurcation diagram and maximum Lyapunov exponent.
23442 其次，以单变量法分别研究机械功率、阻尼系数和励磁增益的改变对系统动力学行为的影响，通过数值仿真绘制系统随参数变化下的分岔图、Lyapunov 指数谱等，选取不同的系统初值，研究同一系统在不同初值的情况下存在的多吸引子共存现象。 Secondly, the influence of mechanical power, damping coefficient and excitation gain on system dynamics behavior is studied respectively. The bifurcation diagrams and Lyapunov exponent spectrum of the system are plotted through numerical simulations, respectively. In addition, the coexistence of attractors with different initial conditions in the same system is investigated.
23443 最后，基于分数阶系统稳定性理论和非线性反馈控制理论，设计同步控制器实现系统混沌控制，数值仿真验证了所设计控制器的有效性。 Finally, from the stability theory of fractional-order system and nonlinear feedback control theory, a synchronous controller of two power systems with different initials is designed, and numerical simulations show the effectiveness of the controller.
23444 该文给出了一种对 13 类常用雷达信号波形的抗截获性能进行评价的新方法，可为雷达波形的设计者提供评价波形抗截获性能的一般性准则。 This paper presents a new method for evaluating the anti-interception performance of thirteen kinds of radar signals, which can be used to guide radar waveform designing.