针对目前配电网用户负荷数据高维度时序数据特征提取难、交叉数据聚类处理难、负荷数据精准标签化难等问题,文章提出面向用户负荷数据的基于降噪自编码器和改进粗糙模糊K均值的特征提取与标签定义模型(feature extraction and label def...针对目前配电网用户负荷数据高维度时序数据特征提取难、交叉数据聚类处理难、负荷数据精准标签化难等问题,文章提出面向用户负荷数据的基于降噪自编码器和改进粗糙模糊K均值的特征提取与标签定义模型(feature extraction and label definition model based on DAE and improve RFKM,FLMbD-iR)。FLMbD-iR通过降噪自编码器对原始用户负荷数据进行深度特征提取后,利用基于类簇规模不均衡度量的粗糙模糊K均值进行聚类,处理聚类中簇间交叉数据存在误差的缺陷,最后构建描述指标对典型日负荷曲线进行标签定义。实验采用美国电力负荷数据进行仿真模拟,实验结果显示本方法在用户负荷数据聚类处理上效果显著。展开更多
With the concept of super-atom, first principles calculations propose a new type of super stable cage clusters AlnH3n that are much more energetic stable than the well established clusters, AlnHn＋2. In the new cluste...With the concept of super-atom, first principles calculations propose a new type of super stable cage clusters AlnH3n that are much more energetic stable than the well established clusters, AlnHn＋2. In the new clusters, the aluminum core-frame acts as a super-atom with n vertexes and 2n A1-A1 edges, which allow to adsorb n hydrogen atoms at the top-site and 2n at the bridge-site. Using Al12H36 as the basic unit, stable chain structures, （Al12H36）m, have been constructed following the same connection mechanism as for （A1H3）n linear polymeric structures. Apart from high hydrogen percentage per molecule, calculations have shown that these new clusters possess large heat of formation values and their combustion heat is about 4.8 times of the methane, making them a promising high energy density material.展开更多
In this paper,an atom-continuum coupled model for thermo-mechanical behaviors in micro-nano scales is presented.A representative volume element consisting of atom clusters is used to represent the microstructure of ma...In this paper,an atom-continuum coupled model for thermo-mechanical behaviors in micro-nano scales is presented.A representative volume element consisting of atom clusters is used to represent the microstructure of materials.The atom motions in the RVE are divided into two phases,structural deformations and thermal vibrations.For the structural deformations,nonlinear and nonlocal deformation at atomic scales is considered.The atomistic-continuum equations are constructed based on momentum and energy conservation law.The non-locality and nonlinearity of atomistic interactions are built into the thermo-mechanical constitutive equations.The coupled atomistic-continuum thermal-mechanical simulation process is also suggested in this work.展开更多
文摘针对目前配电网用户负荷数据高维度时序数据特征提取难、交叉数据聚类处理难、负荷数据精准标签化难等问题,文章提出面向用户负荷数据的基于降噪自编码器和改进粗糙模糊K均值的特征提取与标签定义模型(feature extraction and label definition model based on DAE and improve RFKM,FLMbD-iR)。FLMbD-iR通过降噪自编码器对原始用户负荷数据进行深度特征提取后,利用基于类簇规模不均衡度量的粗糙模糊K均值进行聚类,处理聚类中簇间交叉数据存在误差的缺陷,最后构建描述指标对典型日负荷曲线进行标签定义。实验采用美国电力负荷数据进行仿真模拟,实验结果显示本方法在用户负荷数据聚类处理上效果显著。
基金This work was supported by the Swedish Research Council, Swedish National Infrastructure for Computing, the National Natural Science Foundation of China （No.10534010 and No.20925311）, the Funda-mental Research Funds for the Central Universities （No.201103255）, and the China Scholarship Council.
文摘With the concept of super-atom, first principles calculations propose a new type of super stable cage clusters AlnH3n that are much more energetic stable than the well established clusters, AlnHn＋2. In the new clusters, the aluminum core-frame acts as a super-atom with n vertexes and 2n A1-A1 edges, which allow to adsorb n hydrogen atoms at the top-site and 2n at the bridge-site. Using Al12H36 as the basic unit, stable chain structures, （Al12H36）m, have been constructed following the same connection mechanism as for （A1H3）n linear polymeric structures. Apart from high hydrogen percentage per molecule, calculations have shown that these new clusters possess large heat of formation values and their combustion heat is about 4.8 times of the methane, making them a promising high energy density material.
基金supported by the Special Funds for the National Basic Research Program of China (973 Project) (Grant No. 2010CB832702)the National Natural Science Foundation of China (Grant No. 90916027)also supported by NSAF (Grant No.10976004)
文摘In this paper,an atom-continuum coupled model for thermo-mechanical behaviors in micro-nano scales is presented.A representative volume element consisting of atom clusters is used to represent the microstructure of materials.The atom motions in the RVE are divided into two phases,structural deformations and thermal vibrations.For the structural deformations,nonlinear and nonlocal deformation at atomic scales is considered.The atomistic-continuum equations are constructed based on momentum and energy conservation law.The non-locality and nonlinearity of atomistic interactions are built into the thermo-mechanical constitutive equations.The coupled atomistic-continuum thermal-mechanical simulation process is also suggested in this work.
