共查询到20条相似文献,搜索用时 349 毫秒
1.
2.
基于遗传算法混沌系统同步的研究 总被引:7,自引:1,他引:7
把混沌同步和混沌控制相结合, 利用引导混沌轨道的基本原理, 将模拟自然界生物进化过程的遗传算法用于混沌同步, 提出基于遗传算法引导混沌轨道, 从而实现混沌系统同步的新方法, 目的是使初始条件不同的混沌系统在小扰动作用下能迅速到达同步, 并采取策略使同步得以维持. 以H啨nonMap系统为例的仿真表明, 用此方法实现同步效果良好. 相似文献
3.
4.
5.
6.
7.
基于变量反馈控制方法的混沌控制研究 总被引:1,自引:0,他引:1
将变量反馈控制(VFC)方法用于混沌杜芬方程的控制,通过调整反馈强度,可显著改善混沌现象,并可使系统由初始的混沌轨道被控变成非混沌的轨道,最终进入目标轨道。 相似文献
8.
9.
在不同的研究领域中,混沌系统中的不稳定周期轨道的稳定化问题受到越来越多的重视,若要将混沌轨道控制至周期轨道,则不稳定周期轨道的寻找就变得尤其重要,本文给出了庞加莱截面方法在寻找陈氏混沌系统中失稳周期轨道方面的应用。 相似文献
10.
混沌系统控制与同步可通过优化方法设计控制律引导混沌系统轨道来实现.类电磁机制优化算法(EM)是模拟电磁场带电粒子间吸引一排斥行为机制的一种启发式搜索方法,目前还尚未在混沌系统控制与同步问题中得到应用.本文提出一种混合类电磁机制优化算法(HEM)用于求解该优化问题,该方法采用修改的类电磁机制算法(REM)与差分进化算法(DE)相融合平衡算法对解空间的全局探索和局部开发能力,基准函数测试表明混合算法改善了全局搜索能力及求解可靠性.在此基础上,采用HEM算法引导混沌系统的轨道,搜索施加于系统的小扰动使其轨迹在短时间内跟踪到目标区域;再将混沌系统的同步问题转化为在线轨道导引问题,采用HEM优化算法解决.通过典型离散Henon映射为例,数值仿真结果表明了该方法是解决混沌系统控制与同步的一种有效方法. 相似文献
11.
在计算机模拟作战演习过程中。导调系统起着十分重要的作用。基于高层体系结构(HLA)的导调成员主要是完成传输导调信息,下达导调命令,控制仿真执行进程等功能,达到在不同条件下进行作战综合演练和提高联邦性能的目的。该文主要介绍了基于HLA的作战仿真导调成员生成环境的导调内容和系统组成,并给出了为达到重用目的而进行成员软件框架设计的方法和软件仿真流程。最后作了结论。 相似文献
12.
四路摄像头协同多重触控系统通过拟合四路摄像头得到触点方向线,以解决多触点遮档问题。针对该原理中触点方向线构建问题,提出查找表法、消失点法和立体标定法3种系统标定方法,以实现多触点精确定位。查找表法在交互区边框上设定标定点,通过插值查找对应标定点,以光心和标定点构建触点方向线;消失点法利用触点方向上的消失点和光心构建触点方向线;立体标定法利用极线几何反投影射线构建触点方向线。误差分析实验结果表明,查找表法适用于较小尺寸平台,消失点法适用于大尺寸平台,立体标定方法精度有待提高。 相似文献
13.
一个计算机接警指挥系统的设计和实现 总被引:1,自引:0,他引:1
文中介绍了一个计算机辅助110接警指挥系统-39DS接警指挥系统,该系统通过程控交换机得的到取警信息,利用城市地理信息迅速定位报警地点,同时通过自动拨号同相关单位建立联系,帮助接警人员迅速,准确地作出反应。 相似文献
14.
Jonathan Byrne Erik Hemberg Michael O’Neill Anthony Brabazon 《Genetic Programming and Evolvable Machines》2013,14(3):287-314
A designer should be able to express their intentions with a design tool. This work describes a methodology that enables the architect to directly interact with the encoding of designs they find aesthetically pleasing. Broadening interaction beyond simple evaluation increases the amount of feedback and bias a user can apply to the search. Increased feedback will have the effect of directing the algorithm to more fruitful areas of the search space. We conduct trials on two interfaces for making localised changes to a design in order to evaluate if the user is capable of directing search. In addition, an examination of the locality of changes made by the users provides an insight into how they explore the search space. The results show that a suitably designed interface is capable of directing search and that the participants used different magnitudes of change during directed search. 相似文献
15.
针对基于内容的检索技术在高层语义检索方面的不足,论文提出了一种通过XML大纲(schema)制导进行多媒体标注和检索的方法,即首先以schema来定义多媒体数据的结构,然后以schema制导的方法对多媒体内容进行标注和检索,并尝试采用基于SMIL的技术来实现检索结果的超媒体合成。为实现通用性,提出了schema制导树生成的一般算法,以及检索条件到XQuery查询语句的转换方法,最后描述了一个该方法的具体实现——Schema制导的多媒体标注和检索系统SDMMRS。 相似文献
16.
传统的边缘检测方法通常采用预先的平滑滤波操作排除噪声的干扰,这使得去除噪声的同时也损失了图像的细节。因此,滤波去噪比例和边缘检测精度一直是一对矛盾,本文针对这个问题提出了一种基于边缘定向的边缘优化策略。边缘具有一定的方向是它区别于杂乱无序的噪声的鲜明特征,利用这一特征,可以不需要平滑滤波操作并能很好地解决以上问题。文中还根据数字图像的特点提出了自组织定向这一获取图像边缘方向的有效方法。 相似文献
17.
赵程鹏 《计算机与数字工程》2007,35(4):66-67
客户服务中心,是指综合利用先进的通信及计算机技术,对信息和物资流程优化处理和管理,集中实现沟通、服务和生产指挥的系统。我们来简单探讨一下基于CTI技术的中小规模呼叫中心的建设模式。 相似文献
18.
Curry I. Guinn 《Knowledge》1994,7(4):277-278
Collaboration is more efficient when the most capable participant for each goal has initiative in directing the problem-solving for that goal. The paper describes a method for using a probabilistic analysis to create a mode-switching mechanism that selects which participant should control the collaborative problem solving so that efficiency is maximized. 相似文献
19.
The purposeful-gazing capability of active vision offers advantages to many manufacturing tasks. This paper discusses the problems associated with purposeful gazing and fixation of attention for active vision. In binocular active vision, gazing at a selected target refers to directing the visual axes to capture the target in the (appropriate part of) the visual field by both sensors (cameras), and holding gaze refers to directing the visual axes of the sensors so as to maintain the target or point of interest in the visual field of both sensors. This paper proposes solutions to the important problems involved in gaze stabilization by developing techniques for vergence error extraction, and vergence servo control. Vergence is the tilt movement process of two visual sensors (in a binocular system) in opposite directions to fixate at a selected point. Binocular gazing is realized by decreasing the disparity which represents the vergence error. In order to obtain the disparity for extraction of vergence error, a phase-based approach that robustly and efficiently estimates vergence disparity is developed. To control vergence, we present a dual sampling-rate approach for vision-sensor-based dynamic servo control. 相似文献
20.
《Computers in human behavior》2005,21(4):645-670
Three studies of student regulation of learning were undertaken. In the first study, the temporal organization of the self-regulation process was examined within an individual learning context. Multilevel analysis showed linear and quadratic relations between self-regulation process and the phase of learning. An unexpected negative direct relation between self-regulation and test performance was only found for the process of “directing”. In the two other studies, collaborative computer learning within a 3D environment, on the one hand, and within the context of literacy practices, on the other hand, was examined. Self-regulative processes as “monitoring,” “directing,” and “testing” occurred less frequently than “grounding” and “common agreement” activities. In all three studies, the students rarely “orient” themselves towards the learning task. It is concluded that the adequacy of regulation and not the frequency is important for student learning. 相似文献