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- W4318604521 abstract "By energy usage decomposition, this paper refers to the decomposition of energy use time series data into its major load classes. Specifically, a novel unsupervised learning algorithm is proposed to classify energy usage in a residential unit into fixed loads and one or more classes of shiftable loads. Unlike traditional disaggregation, the algorithm does not require any prior information about the load consumption patterns of individual appliances in the home, thereby fully preserving the home's privacy. Shiftable loads are characterized by ON/OFF duty cycles. The proposed algorithm is based on non-negative matrix factorization (NMF), where fixed loads are represented in terms of real-valued basis vectors, whereas shiftable loads are divided into binary signals. This binary decomposition approach directly applies <tex xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>$L_{0}$</tex> -norm constraints on individual shiftable loads. The new approach obviates the need for more computationally intensive methods (e.g. spectral decomposition or mean-field annealing) that have been used in earlier research for these constraints. A probabilistic framework for the proposed approach has been outlined." @default.
- W4318604521 created "2023-01-31" @default.
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- W4318604521 date "2022-12-04" @default.
- W4318604521 modified "2023-10-01" @default.
- W4318604521 title "An $L_{0}$-Norm Constrained Unsupervised Non-Negative Matrix Factorization Algorithm for Privacy Preserving Energy Usage Decomposition" @default.
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- W4318604521 doi "https://doi.org/10.1109/ssci51031.2022.10022155" @default.
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