In recent years, non-negative matrix factorization (NMF) methods based on graph embedding have been widely applied in the field of image classification. Despite their significant success, these methods have some limit...
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In recent years, non-negative matrix factorization (NMF) methods based on graph embedding have been widely applied in the field of image classification. Despite their significant success, these methods have some limitations: 1) Existing methods are sensitive to noise interference and occlusion;2) They do not fully account for intra-class compactness and inter-class separability;3) Some models arbitrarily assume that the subspace distribution of samples within the same class is identical;4) Traditional graph embedding methods often necessitate the introduction of additional regularization parameters, thereby reducing the algorithm's interpretability. To address these issues, this paper proposes a novel method called robust non-negative matrix factorization with supervised graph embedding (RNMF-SGE). RNMF-SGE integrates label information, graph embedding structures, & ell;2,1-norm sparsity constraint, and NMF method into a unified optimization framework. Firstly, we employ & ell;2,1-norm constraint to reduce sensitivity to noise interference. Secondly, we utilize a weight matrix to ensure that the subspace distribution of samples within the same class is similar but not necessarily identical. To fully consider intra-class compactness and inter-class separability, we impose constraints on the learning of the weight matrix using label information. Lastly, to avoid introducing additional regularization terms, we integrate the supervised weight matrix into the NMF model in a parameter-free manner. Comprehensive experiments demonstrate that RNMF-SGE exhibits enhanced robustness, superior classification performance, and improved generalization capability compared to a series of advanced NMF algorithms.
In the digital age, embedding imperceptible data into images for authenticating ownership and content integrity through watermarking has gained immense importance. Existing watermarking methods struggle to balance imp...
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The aim of link prediction is to predict missing links or eliminate spurious links and new links in future network. Among different types of link prediction algorithms, non-negative matrix factorization(NMF)-based met...
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With the rapid advancement of sequencing technology, the increasing availability of single-cell multi-omics data from the same cells has provided us with unprecedented opportunities to understand the cellular phenotyp...
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With the rapid advancement of sequencing technology, the increasing availability of single-cell multi-omics data from the same cells has provided us with unprecedented opportunities to understand the cellular phenotypes. Integrating multi-omics data has the potential to enhance the ability to reveal cellular heterogeneity. However, data integration analysis is extremely challenging due to the different characteristics and noise levels of different molecular modalities in single-cell data. In this paper, an unsupervised integration method (JSNMFuP) based on non-negative matrix factorization is proposed. This method integrates the information extracted from the latent variables of each omic through a consensus graph. High-dimensional geometrical structure is captured in the original data and biologically-related feature links across modalities are incorporated into the model using regularization terms. JSNMFuP can be utilized for data visualization and clustering, facilitating marker characterization and gene ontology enrichment analysis, providing rich biological insights for downstream analysis. The application on real datasets shows that JSNMFuP has superior performance in cell clustering. The factors are interpretable, making it an effective method for analyzing cell heterogeneity using single-cell multi-omics data.
Mutational signatures are typically identified from tumor genome sequencing data using non-negative matrix factorization (NMF). However, existing NMF techniques only decompose a single dataset, limiting rigorous compa...
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Mutational signatures are typically identified from tumor genome sequencing data using non-negative matrix factorization (NMF). However, existing NMF techniques only decompose a single dataset, limiting rigorous comparisons of signatures across conditions. We propose a Bayesian NMF method that jointly decomposes multiple datasets to identify signatures and their sharing pattern across conditions. We propose a fully unsupervised "discovery-only" model and a semi-supervised "recovery-discovery" model that simultaneously estimates known and novel signatures, and extend both to estimate covariate effects. We demonstrate our approach on extensive simulations, and apply our method to answer questions related to colorectal cancer and early-onset breast cancer.
Operational modal analysis (OMA) has attracted a lot of interest in the field of civil engineering during the past 15 years, to monitor structural health of large-scale infrastructure. Traditional contact-based m...
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ISBN:
(纸本)9789819760664
Operational modal analysis (OMA) has attracted a lot of interest in the field of civil engineering during the past 15 years, to monitor structural health of large-scale infrastructure. Traditional contact-based modal analysis techniques require physically attached sensors for data collection and vibration-based monitoring which can impose mass-loading as well as financial constraints upon installation and maintenance of such devices. Recently, non-contact video-based modal analysis methods for structures with arbitrary complexity using advanced computer vision techniques such as video motion magnification and optical flow have gained much importance. However, these techniques require prior information about the natural frequency ranges of the structure and utilize steerable pyramids which are complex multi-scale image decomposition filters. To address these issues, a technique is suggested in this study to extract the modal parameters (modal frequencies and mode shapes) blindly from the recorded structural vibration video signal using an unsupervised machine learning algorithm called non-negative matrix factorization (NNMF) integrated with a blind source separation technique called Generalized Complexity Pursuit (GCP). NNMF algorithm can be directly applied to the raw pixel-time series formed from the video data to obtain the temporal components, which can be demixed using GCP to identify the individual modal frequencies and mode shapes. The above algorithm is first validated on an 8-degree of freedom (DOF) numerical model and then implemented on laboratory-scale models (multi-storey shear frame model) as well as on real-world recorded structural vibration video like the Tacoma Narrows bridge to determine its noise sensitivity. The modal parameters extracted are compared with those from available literature for validation. The estimation errors obtained from all the validations are well below 1%, which makes the technique quite suitable and reliable for structural v
Optimization on Riemannian manifolds has attracted the attention of many in the machine learning community due to its potential in solving constrained optimization problems. However, high cost of geodesic-based retrac...
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Aiming at the problem that most of the current multi-view clustering methods only focus on the information of a single view, ignoring the correlation between views, and failing to fully explore the potential structure...
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Recommender systems play a crucial role in music streaming services like Spotify to help users discover music that aligns with their preferences. The goal of this research is to create a music recommendation system th...
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Multi-view clustering has been a hotspot in the field of machine learning and pattern recognition, and methods based on non-negative matrix factorization have gained attention for their simplicity and interpretability...
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Multi-view clustering has been a hotspot in the field of machine learning and pattern recognition, and methods based on non-negative matrix factorization have gained attention for their simplicity and interpretability. Despite these methods achieving great clustering performance, there may also be some limitations, such as the full structural information of data and the similarity between different views not being considered. This paper proposes a novel multi-view clustering algorithm based on pairwise co-regularization and robust dual graph non-negative matrix factorization. Firstly, the L-2,L-p -norm is applied in non-negative matrix factorization framework to enhance model robustness. Next, pairwise co-regularization is utilized to extract the inter-view information of all views. Then, graph dual regularization is applied to preserve the structure information of the data and feature spaces. Lastly, an auto-weighted strategy is introduced to assign appropriate weights to each view. In addition, an iterative updating optimization scheme for the proposed algorithm is developed, and the convergence proof of the scheme is provided. The experimental results on twelve real-world datasets show that the proposed algorithm is both effective and efficient, compared with three classical and six state-of-the-art algorithms.
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