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基于改进灰色关联分析和CMPSO⁃LSSVM算法的短期电力负荷预测 被引量:4
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作者 解海翔 陈芳芳 +2 位作者 刘易 盖佳郇 徐天奇 《现代电子技术》 2021年第8期177-181,共5页
为了提高短期负荷预测精度,提出一种基于改进灰色关联分析(IGRA)和混沌粒子群算法(CMPSO)优化最小二乘支持向量机(LSSVM)参数的短期负荷预测的方法。该预测模型首先在传统的灰色关联分析方法基础上做出改进,定义了综合灰色关联度从而选... 为了提高短期负荷预测精度,提出一种基于改进灰色关联分析(IGRA)和混沌粒子群算法(CMPSO)优化最小二乘支持向量机(LSSVM)参数的短期负荷预测的方法。该预测模型首先在传统的灰色关联分析方法基础上做出改进,定义了综合灰色关联度从而选取相似日;其次,针对标准粒子群算法求解LSSVM参数优化问题时存在的易陷入局部最优的缺陷,引入混沌理论对粒子群算法加以改造,建立CMPSO⁃LSSVM预测模型;最后将该方法应用于某市2018年夏季短期负荷预测,仿真结果表明该方法不仅可以避免算法陷入局部极值,还能提高预测的精准度。 展开更多
关键词 关联分析 相似日选取 特征提取 模型建立 算法改造 短期负荷预测
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Layout Design-Based Research on Optimization and Assessment Method for Shipbuilding Workshop
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作者 Yang Liu Mei Meng Shuang Liu 《Journal of Marine Science and Application》 2013年第2期152-162,共11页
The research study proposes to examine a three-dimensional visualization program, emphasizing on improving genetic algorithms through the optimization of a layout design-based standard and discrete shipbuilding worksh... The research study proposes to examine a three-dimensional visualization program, emphasizing on improving genetic algorithms through the optimization of a layout design-based standard and discrete shipbuilding workshop. By utilizing a steel processing workshop as an example, the principle of minimum logistic costs will be implemented to obtain an ideological equipment layout, and a mathematical model. The objectiveness is to minimize the total necessary distance traveled between machines. An improved control operator is implemented to improve the iterative efficiency of the genetic algorithm, and yield relevant parameters. The Computer Aided Tri-Dimensional Interface Application (CATIA) software is applied to establish the manufacturing resource base and parametric model of the steel processing workshop. Based on the results of optimized planar logistics, a visual parametric model of the steel processing workshop is constructed, and qualitative and quantitative adjustments then are applied to the model. The method for evaluating the results of the layout is subsequently established through the utilization of AHP. In order to provide a mode of reference to the optimization and layout of the digitalized production workshop, the optimized discrete production workshop will possess a certain level of practical significance. 展开更多
关键词 visual parametric model steel processing workshop layout optimization design improved genetic algorithm assessment methods optimization algorithm shipbuilding workshop
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