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arXiv research

A locally-built, LLM-digested index of recent arXiv papers in quant finance, geometry/topology, and statistical ML — keyword search served straight from SQLite on this machine.

169,181 papers · 148 categories

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2975958921,189 · Jun 202019922001200920182026
48 results for data completion

New method for matrix completion under complex missing data patterns.

problem Matrix completion with complex missing data patterns.
method Estimate the probability matrix of observation via low-rank matrix estimation and use inverse probabilities weighting to complete the target matrix.
result Optimal asymptotic convergence rates for observation probabilities and target matrix estimation.

New method improves tensor completion for weakly-dependent spatiotemporal data.

problem Improving tensor completion for weakly-dependent data on graphs.
method Introducing L1L_{1}-norm and Graph Laplacian penalties for low-rank tensor decomposition and completion.
result Improved performance in metro passenger flow prediction.

A new training method improves autoregressive data completion efficiency.

problem Efficiently completing missing data in autoregressive models.
method Proposed an alternative training procedure (OA++) that reduces overfitting and leverages prior knowledge.
result OA++ achieves better performance with fewer computations and less overfitting.

With the huge influx of various data nowadays, extracting knowledge from them has become an interesting but tedious task among data scientists, particularly when the data come in heterogeneous form and have missing information. Many data completion techniques had been introduced, especially in the advent of kernel meth…

2017-02-14abs ↗pdf ↗

New model for high rank matrix completion with online and batch methods.

problem Matrix completion for high rank matrices with latent structure.
method Kernel trick to map data into a high dimensional feature space, explicit parametrization of low dimensional subspace, online fitting procedure.
result Online method can handle streaming data and adapt to non-stationary latent structure.

Tensor completion improves EEG-based BCI performance with missing data.

problem Improving classification accuracy in BCI systems with noisy EEG data.
method Tensor decomposition models to infer missing entries in multidimensional EEG datasets.
result Tensor completion algorithms enhance BCI classification accuracy with missing data.

A very simple interpretation of matrix completion problem is introduced based on statistical models. Combined with the well-known results from missing data analysis, such interpretation indicates that matrix completion is still a valid and principled estimation procedure even without the missing completely at random (M…

2016-05-10abs ↗pdf ↗

The paper proposes methods for predicting missing values in mixed data matrices.

problem Matrix completion for mixed data types (continuous, binary, ordinal).
method Generalized latent factor models for low-rank matrix estimation with entrywise consistency.
result Tight probabilistic error bounds for the proposed estimators.

Paper proposes a novel method to improve matrix completion with median loss for large datasets.

problem Matrix completion with absolute deviation loss for large-scale data.
method Proposes a refinement step using pseudo data to improve inefficient estimators of median matrix completion.
result Turns inefficient estimators into a rate (near-)optimal matrix completion procedure.

New method estimates missingness probabilities for MNAR matrix completion.

problem Bias in matrix completion due to missing not at random data.
method Estimate missingness probabilities using nuclear norm structure.
result Improved matrix completion accuracy without auxiliary information.

Study on Brownian motion on discrete curve spaces, proving stochastic completeness.

problem Analyzing Brownian motion on spaces of discrete curves.
method Introduced and studied Brownian motion on spaces of discrete regular curves with Sobolev-type metrics.
result All geodesically complete spaces of discrete regular curves are stochastically complete.

A new framework improves tensor completion accuracy by considering numerical priors.

problem Tensor completion accuracy loss due to ignoring numerical priors.
method Generalized CP Decomposition Tensor Completion (GCDTC) framework incorporating numerical priors.
result GCDTC framework outperforms state-of-the-arts in non-negative tensor completion.

New deep learning model for matrix completion combining linear and nonlinear relationships.

problem Matrix completion considering only linear or nonlinear relations, ignoring latent relationships.
method Combines linear and nonlinear models in a latent variables framework, using a deep neural network with two branches for columns and rows, and manifold learning as an auxiliary task.
result Experimental results show the proposed method outperforms state-of-the-art matrix completion methods.

A new tensor completion method handles missing data with missing not at random entries.

problem Handling missing data in tensors where the probability of observation depends on other entries.
method Estimate propensities using convex relaxation, then use higher-order SVD with inverse propensities weights.
result Finite-sample error bounds on the completed tensor are provided.

The study challenges the notion that partial data annotation is inferior, suggesting it can sometimes outperform complete annotation.

problem The inefficiency and high cost of completely annotating structured data.
method Information theoretic formulation applied to three diverse structured learning tasks.
result Learning from partial structures can sometimes outperform learning from complete ones.

In this paper, we introduce the first method that (1) can complete kernel matrices with completely missing rows and columns as opposed to individual missing kernel values, (2) does not require any of the kernels to be complete a priori, and (3) can tackle non-linear kernels. These aspects are necessary in practical app…

2016-02-08abs ↗pdf ↗

New method for tensor completion using nonconvex dual total variation.

problem Tensor completion from partial measurements with exponential-family noise.
method Proposed dual-TV (DTV) regularizers for tensor completion under exponential-family noise.
result Theoretical upper bounds on recovery error for tensor completion.

Study compares LRMC algorithms under dependent sampling in various applications.

problem Recovering missing entries in partially observed low-rank matrices with dependent sampling.
method Various LRMC algorithms tested under dependent sampling in different contexts.
result Performance differences among LRMC algorithms under dependent sampling.

RMCSE improves voltage estimation in low-observability distribution systems.

problem Insufficient measurements in distribution system state estimation.
method Combines matrix completion and power system model, minimizes rank and residual with different weights.
result Robust voltage estimation in low-observability systems without bad data detection.

Novel LRMC tackles missing data and outliers in large-scale low-rank data recovery.

problem Missing data and extreme outliers in low-rank data analysis.
method Learned Robust Matrix Completion (LRMC) using deep unfolding and flexible neural network framework.
result LRMC achieves optimum performance with low computational complexity and linear convergence.

Paper explores robustness of CCS model for matrix completion.

problem Robustness of cross-concentrated sampling model against sparse outliers.
method Proposes Robust CUR Completion (RCURC) algorithm for efficient non-convex iterative matrix completion.
result Empirical validation of RCURC's efficiency and robustness in synthetic and real datasets.

Paper proposes a method to recover rankings from limited comparisons using low-rank matrix completion.

problem Rank aggregation from pairwise comparisons with limited and noisy data.
method Low-rank matrix completion, alternating minimization algorithm, maximum likelihood estimation.
result Improved algorithm performance over state-of-the-art methods.

The paper recovers missing data entries of high-rank matrices using polynomial polynomials.

problem Recovering missing entries of high-rank matrices with low intrinsic dimension.
method Developed a new polynomial matrix completion method using the kernel trick and relaxation of rank objective.
result Identified complete matrix of minimum intrinsic dimension by minimizing rank in high-dimensional feature space.

Proposes a transductive matrix completion method with calibration for multi-task learning.

problem Improving multi-task learning with multiple related data sources.
method Transductive matrix completion with calibration constraint.
result The proposed algorithm recovers incomplete feature and target matrices with improved results.

Bayesian model improves image completion accuracy by automatically learning low rank structure.

problem Improving image completion accuracy with limited data and avoiding overfitting.
method Developed a Bayesian low rank tensor ring model with multiplicative interaction and Student-T distribution for sparse core factors.
result The proposed method outperforms state-of-the-art image completion techniques, especially in recovery accuracy.