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基于自适应递阶遗传算法的神经网络优化策略 总被引:5,自引:3,他引:5
基于递阶结构的遗传算法可以同时对多层前向神经网络进行结构优化和权重求解。与基本的遗传算法相比,这种算法不仅在权重训练方面更加快速稳定,而且能在学习过程中确定网络的拓扑结构,具有较高的学习效率,而在遗传过程中采用自适应的交叉和变异概率能有效加快遗传速度和避免早熟现象的出现。 相似文献
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提出一种用于非线性函数逼近的小波神经网络的训练算法。分析了网络的拓扑结构,给出了网络的参数估计方法,即混合递阶遗传算法,该算法是递阶遗传算法和多元线性回归的结合,仿真研究表明该方法逼近精度高,为非线性系统建模提供了一种新方法。 相似文献
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吕俊 《计算机工程与应用》2006,42(24):62-64
在自适应递阶遗传算(AHGA)中融入BP操作可以在对神经网络结构进行优化的同时,充分利用遗传算法的全局寻优能力在大范围内搜索可能的误差极值区域,并利用BP算法沿误差最速下降方向在极值点附近快速搜索,从而达到全局最优和快速搜索的有机结合。通过对混沌时序信号的预测,表明了混合学习策略在较大程度上改进了神经网络的学习性能和泛化能力。 相似文献
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基于AHGA+BP的神经网络混合学习策略 总被引:1,自引:0,他引:1
吕俊 《计算机工程与应用》2006,42(24):62-64
在自适应递阶遗传算法(AHGA)中融入BP操作可以在对神经网络结构进行优化的同时,充分利用遗传算法的全局寻优能力在大范围内搜索可能的误差极值区域,并利用BP算法沿误差最速下降方向在极值点附近快速搜索,从而达到全局最优和快速搜索的有机结合。通过对混沌时序信号的预测,表明了混合学习策略在较大程度上改进了神经网络的学习性能和泛化能力。 相似文献
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基于递阶遗传算法的BP网络结构设计与权值训练 总被引:1,自引:1,他引:0
针对BP网络结构设计及权值训练算法多种改进方案的不足,基于递阶遗传算法,本文同时考虑神经网络结构设计和权值训练,提出一种新的适应度函数,实现了对BP网络结构和权值的同步优化。仿真结果证明了本文算法的有效性。 相似文献
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基于HGA的模糊神经控制器设计及其应用 总被引:1,自引:0,他引:1
将神经网络与模糊控制相结合,实现了模糊控制器的自学习和自适应。给出一种基于递阶遗传算法的模糊神经网络优化算法,通过对每个染色体采用递阶编码,可以同时优化模糊神经网络结构和权值参数。将这种模糊神经网络控制器应用于镍氢电池的充电控制中,证明了算法的有效性。 相似文献
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提出一种利用模拟退火和混合递阶遗传算法优化RBF神经网络的方法。通过利用混合递阶遗传算法对RBF神经网络的拓扑结构、径向基中心和半径进行参数寻优,引入模拟退火算法对交叉和变异概率进行控制,采用最小二乘法确定网络的输出权值。将此方法应用于典型实例,并与其他四种方法进行对比,通过试验结果证明了该方法的准确率明显优于其他四种方法,方法的可行性和优越性得到验证。 相似文献
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S. Shaw 《Journal of Computer Assisted Learning》1993,9(2):93-99
Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained. 相似文献
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European Community policy and the market 总被引:1,自引:0,他引:1
C. Lloyd 《Journal of Computer Assisted Learning》1993,9(2):86-91
Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven. 相似文献
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融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。 相似文献
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Wayne O’Brien Author Vitae 《Journal of Systems and Software》2008,81(11):1997-2013
Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them. 相似文献
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This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives. 相似文献
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潘丽 《自动化与仪器仪表》2014,(7):80-82
自然界的绝大部分信号都是以模拟的形式存在,因此模拟信号的采集转换存储在数字时代十分关键。文章讨论了在雷达信号处理领域基于AD9626的AD采集存储卡的设计原理、硬件结构和程序设计与芯片配置等问题,为今后相关领域的研究提供了可参考的方案。 相似文献
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Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what
is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic
sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and
its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of
an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify
robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can
or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest.
This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January
31–February 2, 2008 相似文献
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张涛 《计算机测量与控制》2015,23(1):86-89
为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值. 相似文献
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Jacob Palme 《Software》1979,9(9):741-747
The COM teleconferencing system was designed to be easy to use for both beginners and people with much computer experience. A number of design choices in organizing the human-computer interface were considered very carefully. These design problems are not unique for teleconferencing applications, but will appear in many other developments of human-computer interfaces for non-computer specialists. This report discusses naming conventions, menu format, user commands, help facility and the treatment of ‘type ahead’ from the users. 相似文献