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《自动化仪表》2019,(7)
为了解决前馈(BP)神经网络在配电网工程建设工程造价预测时,容易陷入局部极小而导致预测精度降低的问题,提出了一种GA-BP神经网络的配电网工程造价预测模型。模型试算与分析结果表明:除了个别样本数据外,GA-BP模型预测数据的相对误差小于BP模型预测数据的相对误差。其中,GA-BP模型的预测数据的相对误差整体最小,BP模型的相对误差整体最大,BP整体的相对误差要稍小于GA-BP。GA-BP和BP的模型平均相对误差数值更小,GA-BP模型的平均相对误差最小,说明该模型的预测稳定性最强。此外,GA-BP和BP的模型稳定性和预测的精度上都要优于GA-BP和BP。其中,GA-BP的预测模型最好,BP预测模型最差。该基于GA-BP神经网络的配电网工程造价预测模型为提高配电网工程造价预测精度提供了一定的理论基础。 相似文献
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为了提高相对高度测量的精确性,研究并实现了一种基于气压传感器阵列式测量和遗传算法(GA)优化反向传播(BP)神经网络数据融合处理的高精度气压式相对高度计,给出了相应的硬件结构和软件设计。结合实验测量的数据和相关文献的数据,从准确性、稳定性和通用性的角度对GA-BP神经网络、传统BP神经网络以及标准计算公式在气压式相对高度计中应用的性能进行了对比分析。研究结果表明,本文提出的基于GA-BP神经网络的相对高度计具有更高的测量精度、更高的稳定性和更好的推广能力,能够满足日常相对高度的实时测量需求。 相似文献
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BP神经网络模型在预测领域中应用十分广泛,但其在网络学习过程中存在缺陷,结合遗传算法(GA)能够得到改善。历年的降雨量可以视为时间序列问题,本文分别建立BP神经网络和基于GA的BP神经网络对广州市降雨量进行预测,模型测试显示,GA-BP模型的预测效果优于BP模型。最后应用GA-BP神经网络模型对2014年的广州降雨量进行预测,预测结果为1635.1毫米。 相似文献
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基于种群熵的GA-BP混合优化算法及其应用 总被引:1,自引:0,他引:1
文章通过引入种群熵的概念把遗传算法和神经网络的BP算法有机结合起来,提出了一种新的混合算法GA-BP混合优化算法,从而充分利用了遗传算法和神经网络的BP算法各自具有的优点,并把GA-BP混合优化算法应用到机器人坐标逆变换中去。实验表明,GA-BP混合优化算法能较好地实现机器手端坐标到关节角的变换。 相似文献
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以实现科学、准确、可操作的区域自主创新能力评估分类为目标,提出一种基于决策树遗传算法和BP神经网络的组合模型(Decision Tree Genetic Algorithm and Back Propagation,DTGA-BP).利用决策树对评估指标进行特征选择并通过优化隐藏层神经元数目对神经网络的结构进行改进;采用非线性的交叉变异概率值的遗传操作结合一种新的选择算子方式优化BP神经网络的初始权重与阈值.实验结果表明,组合模型的评估结果相比传统的主观赋值法更为科学准确;较单一BP神经网络模型和GA-BP模型在分类精度方面分别提高了41%和20%. 相似文献
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为实现结构复杂、低压台区智能配电网的线损计算,首先构建误差反向传播(BP)神经网络模型以计算配电网理论线损,然后利用遗传算法(GA)深度优化神经网络并建立GA-BP模型。基于上述模型计算配电网的理论线损率并对模型计算性能进行比对分析。结果表明,使用GA-BP模型进行线损计算比单一BP模型计算的平均绝对误差减少约0.273%。应用遗传算法优化后的神经网络线损率计算模型较单一BP神经网络模型具有更好的非线性拟合能力和更高的计算精度。 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