共查询到20条相似文献,搜索用时 62 毫秒
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针对电力负荷的小样本、非线性、高维数和局部极小点等问题,提出采用最小二乘支持向量机方法建模,以历史负荷、温度、湿度等数据作为输入量,对短期电力负荷进行预测;针对最小二乘支持向量机在建模中存在的参数选取问题,采用一种根据种群多样性信息来指导初始种群选取和避免粒子早熟收敛现象的改进粒子群优化算法来优化最小二乘支持向量机的惩罚因子和核参数。仿真结果表明,基于改进粒子群优化算法和最小二乘支持向量机的短期电力负荷预测方法较最小二乘支持向量机预测方法、基于基本粒子群优化算法和最小二乘向量机的预测方法具有更好的预测精确度。 相似文献
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基于粒子群LSSVM的网络入侵检测 总被引:1,自引:0,他引:1
研究保护网络安全问题,计算机网络攻击的多样性及隐蔽性导致网络入侵检测困难.当前流行的人工神经网络检测方法的网络入侵检测率仅70%左右,不能满足网络安全防护需求,为了解决上述问题,提出基于最小二乘支持向量机和粒子群优化算法(PSO-LSSVM)的网络入侵检测方法,粒子群优化算法用于选择合适的最小二乘支持向量机参数.方法泛化能力强,识别精度高.在网络入侵检测中,通过KDDCup99数据库数据进行仿真,证明方法的优越性.实验结果表明粒子群优化算法与最小二乘支持向量机组合方法的网络入侵检测精度优于LSSVM与SVM.可见,PSO-LSSVM非常适合于网络入侵检测,可为网络保护设计提供参考. 相似文献
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研究小样本数据对飞机武器系统的设计和改型方案是航空系统工程的重要内容。针对提高设计的进度和质量问题,利用粒子群优化算法的群体智能优化理论与最小二乘回归支持向量机的回归思想,提出了一种基于粒子群算法与最小二乘回归支持向量机的飞机设计综合智能论证模型。提出应用粒子群算法对支持向量机核函数参数进行寻优,再利用优化的核函数参数支持向量机回归模型,建立映射模型来对飞机的作战效能进行预测。仿真实例验证了方法的适用性和结果的可靠性。 相似文献
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基于最小二乘支持向量机的机器视觉识别方法 总被引:1,自引:0,他引:1
为了解决传统的机器视觉识别技术识别精度低的难题,提出基于粒子群优化最小二乘支持向量机的机器视觉识别方法.首先,对机器视觉采集的图像进行特征提取;然后,利用特征数据建立基于粒子群优化最小二乘支持向量机的识别模型;最后,以红枣缺陷识别作为应用案例以证明该方法的有效性及优越性.分别采用人工神经网络、支持向量机与该方法进行对比... 相似文献
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损伤检测方法是关联智能结构实现损伤自诊断功能的一个重要研究内容。针对支持向量机研究的关键与难点——核函数的构造及核参数的优化问题,基于小波核函数的近似正交性,研究基于小波核的最小二乘支持向量机(LSWSVM)方法,并采用粒子群优化算法(PSO)对LSWSVM参数进行优化,从而构造PSO-LSWSVM方法。基于压电元件的正逆压电效应,搭建损伤自诊断压电智能结构试验系统,对各压电传感器的响应信号进行功率谱密度最大值(PSM)特征提取。基于各压电传感器的响应信号特征,将该PSO-LSWSVM方法应用于智能结构损伤自诊断,并对该方法进行性能评价。结果表明,在同等条件下,LSWSVM有比基于高斯核函数的最小二乘支持向量机(LSSVM)更高的损伤检测精度及更强的推广能力,相比于传统遗传算法(TGA),该方法中粒子群优化算法(PSO)具有较好的寻优能力和收敛速度。 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