Modified projective phase synchronization of chaotic complex nonlinear systems

This paper introduces the concept of Modified Projective Phase Synchronization (MPPS) for interacting chaotic systems with complex variables. The idea is that the number of effective state variables can be increased by treating the real and imaginary parts separately. On the basis of the Lyapunov stability theory, a scheme is designed to realize the new form of chaotic synchronization, and we demonstrate how chaotic complex systems in a master–slave configuration can be synchronized to a constant scaling matrix. The speed and accuracy of the synchronization are illustrated by means of computer simulation.     

Grounding spatial language in perception: An empirical and computational investigation.

The present paper grounds the linguistic categorization of space in aspects of visual perception; specifically, the structure of projective spatial terms such as above are grounded in the process of attention and in vector-sum coding of overall direction. This is formalized in the attentional vector-sum (AVS) model. This computational model accurately predicts linguistic acceptability judgments for spatial terms, under a variety of spatial configurations. In 7 experiments, the predictions of the AVS model are tested against those of 3 competing models. The results support the AVS model and disconfirm its competitors. The authors conclude that the structure of linguistic spatial categories can be partially explained in terms of independently motivated perceptual processes. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Projective identification: Whose projection-whose identity?

An examination of the concept of projective identification indicates that it is incongruent with a definition as a primitive defense mechanism. Its application to countertransference as currently in the literature has been misleading. It is redefined here as a transactional process, where the projection contains a quality of intensity or power leading to induction of aspects of the projection, but viewing the induction as a function of the recipient's vulnerability due to identity fragmentation. Implications for transference/countertransference issues in the analytic milieu are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

三次透视投影变换图像拼接

为了减少带有路面信息的建筑物图像的拼接中产生的图像失真并提高拼接速度,基于局部变形方法并结合建筑物和路面纹理信息的不同提出了三次投影变换图像拼接方法。该方法根据图像内容将图像分割成不同子图像,然后拼接图像内容相同的子图像,最后实施总体拼接。为了改善当前全局投影变换带来的图像形状失真或扭曲问题,整个拼接过程采用三次局部的透视投影图像变换方法。由于是在传统的透视投影变换的基础上基于图像内容分割后再拼接,故拼接结果比传统方法更精确、更真实。实验结果表明:采用提出的图像拼接方法克服了路面部分纹理信息过少导致图像失真的缺陷,拼接速度比相关拼接方法提高了20%~40%。该方法能快速得到清晰无缝的拼接图像,基本满足拼接速度快、真实度高的要求。     

超混沌系统的动力学性质及同步问题的研究

选取一个超混沌Qi系统,详细分析其动力学性质。采取基于观测器的方法来实现系统在不同初值条件下的同结构投影同步,并采用反馈法的思想设计合适的控制器,以实现Qi系统和Liu系统不同结构之间的完全同步。通过Lyapunov稳定性定理证明控制器的合理性,并对两种同步方法进行数值仿真来证明其可行性和有效性。     

基于固定扫描点的建筑物三维测量方法

提出一种基于固定激光扫描点的三角投影法测量建筑物大目标三维尺寸的方法。利用线结 构光旋转扫描形面和对投影图像进行处理分析,实现三维重建和测量。导出了三维几何尺寸的计算公式,进行了仿真实验,获得满意的数据。在进行建筑物等大目标三维测量时,不需激光器和传感器平行移动,减少误差来源,提高精度,方便可行。     

局部投影降噪算法参数的确定及其应用

针对水声信号的非线性特征,采用局部投影降噪算法研究了舰船辐射噪声的非线性降噪问题.在分析局部投影降噪算法有关参数的选择对降噪效果影响的基础上,研究了局部投影邻域半径参数的估计.提出一种适合水声信号降噪的邻域半径估计算法,即通过估算信号的噪声强度确定局部投影的邻域半径.对Logistic模型和实际舰船信号进行降噪处理,结...     

基于角点和Hu矩不变量的可见光和红外图像自动配准方法

针对红外图像与可见光图像的自动配准问题,提出了一种基于图像角点特征和透视变换模型的方法.首先采用自适应阈值对红外与可见光图像进行分割,然后利用Harris因子分别在分割后的红外和可见光图像上检测角点.通过分析角点邻域在原始图像上的相关性实现角点的粗匹配.接着通过RANSAC算法对角点进行细匹配,删除outliers,再...     

红外隐身材料的性能特征述评

简述了红外隐身材料的工作原理 ,分析了不同类型红外隐身材料的性能特征 ,并综述了国内外红外隐身材料的研究现状