期刊文献+
共找到3篇文章
< 1 >
每页显示 20 50 100
三维地理信息系统中纹理的非参数映射及矢量剪切 被引量:3
1
作者 田宜平 刘刚 +1 位作者 韩志军 吴冲龙 《地质科技情报》 CAS CSCD 北大核心 2000年第2期103-106,共4页
根据日常生活和地矿工作的实际需要 ,利用相似变形原理 ,提出了一种新的非参数映射法——实物标志点映射法 ,同时给出了纹理映射后的矢量剪切算法——空间曲面网格与剪切平面求交的算法。这种新的纹理映射法和矢量剪切算法简单易行且准... 根据日常生活和地矿工作的实际需要 ,利用相似变形原理 ,提出了一种新的非参数映射法——实物标志点映射法 ,同时给出了纹理映射后的矢量剪切算法——空间曲面网格与剪切平面求交的算法。这种新的纹理映射法和矢量剪切算法简单易行且准确可靠 ,而且具有很强的灵活性和适应性 ,推广应用前景良好。一个典型城市景观的应用实例说明了该方法的有效性。 展开更多
关键词 GIS 纹理 非参数映射 矢量剪切
下载PDF
流形学习样本外点问题解决方法的比较研究
2
作者 黄红兵 《电大理工》 2024年第3期8-12,36,共6页
流形学习作为一种非线性降维技术,近年来已经在降维、数据可视化、特征提取及数据重构方面取得了许多成功的应用,然而,流形学习用于监督分类时效果却不尽人意,这是因为流形学习用于监督分类时会碰到样本外点问题。该问题能否妥善解决对... 流形学习作为一种非线性降维技术,近年来已经在降维、数据可视化、特征提取及数据重构方面取得了许多成功的应用,然而,流形学习用于监督分类时效果却不尽人意,这是因为流形学习用于监督分类时会碰到样本外点问题。该问题能否妥善解决对于流形学习用于监督分类来说至关重要。因此,文章侧重分析了非参数映射、核岭回归、广义回归神经网络这三种典型算法的主要步骤和各自的优缺点,并通过实验进行分析比较,为有监督分类提供有益借鉴。 展开更多
关键词 流形学习 样本外点问题 非参数映射 核岭回归 广义回归神经网络 监督分类
下载PDF
Methodology for Obtaining Electricity-Price Patterns in Customer Response Programs
3
作者 A. Gabaldon A. Guillamon +4 位作者 M.C. Ruiz S. Valero M. Ortiz C. Senabre C. Alvarez 《Journal of Energy and Power Engineering》 2011年第11期1087-1095,共9页
The main objective of electricity regulators when establishing electricity markets is to decrease the cost of electricity through competition. However, this scenario cannot be achieved without a full participation of ... The main objective of electricity regulators when establishing electricity markets is to decrease the cost of electricity through competition. However, this scenario cannot be achieved without a full participation of the electricity demand by reacting against electricity prices. The aim of this research is to develop tools for helping customers and aggregators to join price and demand response programs, while helping them to hedge against the risk of short-term price volatility. In this way, the capacity of and hybrid methodology (Self-Organizing Maps and Statistical Ward's Linkage) to classify high electricity market prices is analysed. Besides, with the help of Non-Parametric Estimation, some price-patterns were found in the abovementioned clusters. The contained knowledge within these patterns supplies customer market-based information on which to base its energy use decisions. The interest for this participation of customers in markets is growing in developed countries to obtain a higher elasticity in demand. Results show the capability of this approach to improve data management and select coherent policies to accomplish cleared demand offers amongst different price scenarios in a more flexible way. 展开更多
关键词 Clustering customer demand response customer price response demand elasticity electricity markets.
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部