| ID | 原文 | 译文 |
| 55327 | 仿真结果表明,NDO可以实现对系统不确定性的精确观测和补偿,滑模控制律具有对系统建模误差和大气风切变的鲁棒性和抗干扰性。 | The simulation results show that NDO can realize accurate observation and compensation of system uncertainties, the sliding mode control law with error of system modeling and atmospheric wind shear robustness and anti-interference. |
| 55328 | 由于C4ISR体系结构模型缺乏可执行性,不利于体系结构的验证评估,为此提出了一种基于fUML(semantics of a foundational subset for executable unified modeling language models)的体系结构建模与分析方法。 | Due to the lack of enforceability C4ISR system structure model for validation of architecture evaluation, put forward a kind of based on fUML (semantics of a foundational subset for the executable unified modeling language) models of architecture modeling and analysis methods. |
| 55329 | 基于fUML元模型来定义C4ISR体系结构的可执行建模元模型,使用它们来构建C4ISR体系结构的可执行模型;定义可执行模型的代数语义域——可执行活动模型代数(executable activity model algebra,EAMA),使用语义函数将可执行模型的行为语义转换为EAMA的进程项;定义EAMA的操作语义作为进程项的执行规约,通过对进程项的仿真执行来实现C4ISR体系结构的可执行分析,最后以区域防空作战系统为例说明了方法的可行性。 | Based on fUML meta model to define the C4ISR architecture modeling executable metamodel, use them to build the executable models of C4ISR architecture;Define the executable models of semantic domain - executable activity model algebra (the executable activity model algebra, EAMA), using semantic function converts the behavior of the executable models semantic EAMA process;Define EAMA operational semantics as the process of the implementation of the code, through the process of simulation performed to realize the C4ISR system structure can perform analysis, finally to area air defense combat system as an example illustrates the feasibility of the method. |
| 55330 | 天波超视距雷达(over-the-horizon radar,OTHR)中,机动目标信号存在频谱扩展,导致目标检测性能下降。 | Sky-wave over-the-horizon radar (over - the - horizon radar, OTHR) in maneuvering target signal spectrum expansion, resulting in a decline in target detection performance. |
| 55331 | 强的海杂波进一步增加了机动目标的检测难度。 | Strong sea clutter further increasing the difficulty of maneuvering target detection. |
| 55332 | 针对该问题,考虑到海杂波信号能量主要集中在零频附近,而且可以建模为一个自回归(auto-regressive,AR)过程,用AR滤波器抑制海杂波; | Aiming at this problem, considering the sea clutter signal energy is concentrated near the zero frequency, and can be modeled as a autoregressive (auto - regressive, AR) process, AR filter to suppress sea clutter. |
| 55333 | 考虑到机动目标信号近似为线性调频信号,而分数阶傅里叶变换(fractional Fourier transform,FRFT)能有效积累线性调频信号的能量,因此采用FRFT算法估计目标运动参数,实现机动目标检测;在此基础上用分级迭代的FRFT进一步降低运算量;针对多目标检测问题,用"CLEAN"方法逐个检测机动目标。 | Considering the maneuvering target signal is approximate to linear frequency modulation signal, the fractional Fourier transform, fractional Fourier transform, the FRFT) can effectively accumulate the energy of linear frequency modulation signal, so the FRFT algorithm to estimate target motion parameters and realize the maneuvering target detection;On the basis of using hierarchical iteration of FRFT further reduce the computational complexity;In view of the multi-target detection problem, with the "CLEAN" method one by detecting maneuvering targets. |
| 55334 | 仿真结果表明,与已有的离散多项式变换(discrete polynomial transform,DPT)算法相比,本文算法可以更好地适用于多目标检测;与Radon-Wigner变换算法相比,本文算法可以达到更高的参数估计精度。 | The simulation results show that with the discrete polynomial transform (discrete 'polynomial transform, DPT) algorithm, the algorithm in this paper can better apply to multiple target detection;Compared with the Radon - Wigner transform algorithm, this algorithm can achieve higher precision of parameter estimation. |
| 55335 | 在脉冲压缩雷达系统中估计目标波达方向(direction of arrival,DOA)的主要问题之一是:脉压前信号的信噪比低、目标没有在距离域分开; | In the pulse compression radar system estimate DOA (direction of concatenated, DOA) is one of the major problems: |
| 55336 | 脉压后的信号虽然信噪比得到了改善且目标已按距离分开,但是快拍数却非常有限。 | the low signal-to-noise ratio of the former pulse pressure signal, target is not separate from the domain;Though the SNR of signal pulse pressure is improved and the target has been according to the distance apart, but the snapshot number is limited. |