Frequency modulated continuous wave(FMCW)radar is an advantageous sensor scheme for target estimation and environmental perception.However,existing algorithms based on discrete Fourier transform(DFT),multiple signal c...Frequency modulated continuous wave(FMCW)radar is an advantageous sensor scheme for target estimation and environmental perception.However,existing algorithms based on discrete Fourier transform(DFT),multiple signal classification(MUSIC)and compressed sensing,etc.,cannot achieve both low complexity and high resolution simultaneously.This paper proposes an efficient 2-D MUSIC algorithm for super-resolution target estimation/tracking based on FMCW radar.Firstly,we enhance the efficiency of 2-D MUSIC azimuth-range spectrum estimation by incorporating 2-D DFT and multi-level resolution searching strategy.Secondly,we apply the gradient descent method to tightly integrate the spatial continuity of object motion into spectrum estimation when processing multi-epoch radar data,which improves the efficiency of continuous target tracking.These two approaches have improved the algorithm efficiency by nearly 2-4 orders of magnitude without losing accuracy and resolution.Simulation experiments are conducted to validate the effectiveness of the algorithm in both single-epoch estimation and multi-epoch tracking scenarios.展开更多
It is a great challenge to use digital technology to inherit and reproduce Xinjiang Qiuci music and dance authentically. The thesis displays the cultural beauty of Qiuci music and dance through the change of vector im...It is a great challenge to use digital technology to inherit and reproduce Xinjiang Qiuci music and dance authentically. The thesis displays the cultural beauty of Qiuci music and dance through the change of vector images controlled by bones. The concrete methods are： first, get video images, do edge detection; then set up 2D character model based on anime studio, and build the skeleton according to the level, make key frames; finally use vector animation performance with the help of platform. Compared with Flash, this method is more flexible and natural. By setting up the skeleton libraries, it could lay the foundation for intellectualized design animation performance.展开更多
Xinjiang folk art patterns and designs are the art treasures of Chinese cultural treasure-house as well as the precious humanistic resources of Western China. In the process of collecting, sorting out and studying Xin...Xinjiang folk art patterns and designs are the art treasures of Chinese cultural treasure-house as well as the precious humanistic resources of Western China. In the process of collecting, sorting out and studying Xinjiang folk art patterns, the elegant simplicity as well as the good taste stands out impressively, and the pattern shape as well as the layout composition shows a distinctive national trait and a strong local color. As ＂The Geometry of Nature＂, fractal geometry brings about a new performing method. Various fractal graphs are created by different generators. Their dynamic pictures contain visual information of great magnitude and their artistic effect is similar to Xinjiang folk art patterns, which fully proves the fractal beauty in Xinjiang folk art patterns.展开更多
本文以空间任意分布的传感器阵列为例,提出一种有效的二维波达方向(Two-Dimensional Direction of Arrival,2D DOA)检测算法。在分析MUSIC算法原理以及谱峰分布特征的基础上,通过步长设置,由局部逐步逼近全局最优,成功进行2D DOA检测,...本文以空间任意分布的传感器阵列为例,提出一种有效的二维波达方向(Two-Dimensional Direction of Arrival,2D DOA)检测算法。在分析MUSIC算法原理以及谱峰分布特征的基础上,通过步长设置,由局部逐步逼近全局最优,成功进行2D DOA检测,避免了穷尽搜索。仿真结果表明,在信噪比、快拍数、阵元个数变化下本文算法具有很高的检测效率。展开更多
基金funded by the National Natural Science Foundation of China,grant number 42074176,U1939204。
文摘Frequency modulated continuous wave(FMCW)radar is an advantageous sensor scheme for target estimation and environmental perception.However,existing algorithms based on discrete Fourier transform(DFT),multiple signal classification(MUSIC)and compressed sensing,etc.,cannot achieve both low complexity and high resolution simultaneously.This paper proposes an efficient 2-D MUSIC algorithm for super-resolution target estimation/tracking based on FMCW radar.Firstly,we enhance the efficiency of 2-D MUSIC azimuth-range spectrum estimation by incorporating 2-D DFT and multi-level resolution searching strategy.Secondly,we apply the gradient descent method to tightly integrate the spatial continuity of object motion into spectrum estimation when processing multi-epoch radar data,which improves the efficiency of continuous target tracking.These two approaches have improved the algorithm efficiency by nearly 2-4 orders of magnitude without losing accuracy and resolution.Simulation experiments are conducted to validate the effectiveness of the algorithm in both single-epoch estimation and multi-epoch tracking scenarios.
基金Supported by National Natural Science Foundation of China(61163044)Xinjiang Uygur Autonomous Xinjiang Science and Technology Projects(201191215)Philosophy and Social key Fund Project(12AZD118,12AZD120)
文摘It is a great challenge to use digital technology to inherit and reproduce Xinjiang Qiuci music and dance authentically. The thesis displays the cultural beauty of Qiuci music and dance through the change of vector images controlled by bones. The concrete methods are： first, get video images, do edge detection; then set up 2D character model based on anime studio, and build the skeleton according to the level, make key frames; finally use vector animation performance with the help of platform. Compared with Flash, this method is more flexible and natural. By setting up the skeleton libraries, it could lay the foundation for intellectualized design animation performance.
基金Supported by Xinjiang Uygur Autonomous Xinjiang Science and Technology Projects(2014211A046)
文摘Xinjiang folk art patterns and designs are the art treasures of Chinese cultural treasure-house as well as the precious humanistic resources of Western China. In the process of collecting, sorting out and studying Xinjiang folk art patterns, the elegant simplicity as well as the good taste stands out impressively, and the pattern shape as well as the layout composition shows a distinctive national trait and a strong local color. As ＂The Geometry of Nature＂, fractal geometry brings about a new performing method. Various fractal graphs are created by different generators. Their dynamic pictures contain visual information of great magnitude and their artistic effect is similar to Xinjiang folk art patterns, which fully proves the fractal beauty in Xinjiang folk art patterns.
文摘本文以空间任意分布的传感器阵列为例,提出一种有效的二维波达方向(Two-Dimensional Direction of Arrival,2D DOA)检测算法。在分析MUSIC算法原理以及谱峰分布特征的基础上,通过步长设置,由局部逐步逼近全局最优,成功进行2D DOA检测,避免了穷尽搜索。仿真结果表明,在信噪比、快拍数、阵元个数变化下本文算法具有很高的检测效率。
