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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.

169,291 papers · 148 categories

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8.3%16.7%25.0%33.3% · Jan 199319922001200920182026
48 results for scale-up estimator

ADVGP scales up Gaussian process regression to large datasets efficiently.

problem Expensive computational cost of traditional GP inference for large datasets.
method Asynchronous Distributed Variational Gaussian Process (ADVGP) with weight space augmentation and asynchronous proximal gradient optimization.
result ADVGP achieves superior prediction accuracy for large-scale regression tasks.

This paper solves parameter estimation with ordered 2\ell_2 regularization using ADMM.

problem Scaling up ordered 2\ell_2 regularization for large-scale data.
method Alternating Direction Method of Multipliers (ADMM) for ordered 2\ell_2 regularization.
result ADMM-O2\ell_{2} outperforms or matches state-of-the-art methods in parameter estimation.

This thesis examines the accuracy of scaling VaR estimates for longer holding periods.

problem The accuracy of VaR estimates for longer holding periods using the square root of time rule.
method Examined VaR scaling for longer holding periods using empirical analysis.
result Scaling can provide good estimates of VaR but may lead to significant losses over time.

Scaling up model and data size improves imitation learning in single-agent games.

problem Limited recovery of expert behavior in single-agent games using imitation learning.
method Investigate the effect of scaling model and data size on imitation learning performance.
result IL loss and mean return scale with compute budget, resulting in power laws.

Active testing for large language models is made more efficient and accurate.

problem Efficient evaluation of large language models with limited labels.
method Cost-saving measures and in-context learning for constructing a surrogate model.
result Significantly more accurate evaluations of LLM performance compared to random data acquisition.

A new R package for high-dimensional regression and precision matrix estimation.

problem High-dimensional linear regression and precision matrix estimation challenges.
method flare package implements various regression methods and extensions for sparse precision matrix estimation.
result The flare package is efficient and scalable for large problems.

Bayesian optimization speeds up bioprocess development across scales.

problem Costly and complex bioprocess development across scales and biocatalyst selection.
method Multi-fidelity batch Bayesian optimization framework integrating Gaussian Processes and mixed-variable optimization.
result Reduction in experimental costs and increased yield in bioprocess optimization.

Deep learning improves image reconstruction, but scaling up training sets doesn't significantly boost performance.

problem Understanding the impact of training set size on deep learning image reconstruction.
method Empirical study and analytical characterization of performance scaling laws.
result Scaling up training set size does not significantly improve reconstruction quality for deep learning.

Paper improves tree probability estimation using stochastic optimization and variance reduction.

problem Improving tree probability estimation in phylogenetic inference.
method Introduces computationally efficient methods for training SBNs and variance reduction for optimization.
result Methods outperform previous baseline methods in tree topology probability estimation and Bayesian phylogenetic inference.

We consider the problem of clustering a set of high-dimensional data points into sets of low-dimensional linear subspaces. The number of subspaces, their dimensions, and their orientations are unknown. We propose a simple and low-complexity clustering algorithm based on thresholding the correlations between the data po…

2013-03-15abs ↗pdf ↗

Random features are improved by variance-reducing couplings, enhancing machine learning models.

problem Improving the efficiency and accuracy of random features in machine learning.
method Using optimal transport theory to find couplings that reduce variance in random features.
result Theoretical and practical gains in efficiency and accuracy for various machine learning models.

We consider large-scale Markov decision processes (MDPs) with parameter uncertainty, under the robust MDP paradigm. Previous studies showed that robust MDPs, based on a minimax approach to handle uncertainty, can be solved using dynamic programming for small to medium sized problems. However, due to the "curse of dimen…

2013-06-26abs ↗pdf ↗

HCNAF models complex conditional distributions for probabilistic occupancy forecasting.

problem Modeling complex conditional probability density functions for occupancy forecasting.
method Hyper-Conditioned Neural Autoregressive Flow (HCNAF) combining AF and hyper-network.
result HCNAF achieves state-of-the-art performance in self-driving datasets.

Noisy natural gradient improves variational inference for Bayesian neural nets.

problem Tradeoff between simple and complex variational families in Bayesian neural nets.
method Adaptive weight noise in natural gradient ascent to implicitly fit variational posteriors.
result Noisy natural gradient algorithms can train full-covariance variational posteriors efficiently.

Paper proposes a new PLL framework with a progressive identification algorithm.

problem Weakly supervised learning with partial labels.
method Flexible model and optimization algorithm for PLL, progressive identification algorithm.
result Established an estimation error bound and set new state of the art.

Dynamic topic models (DTMs) are very effective in discovering topics and capturing their evolution trends in time series data. To do posterior inference of DTMs, existing methods are all batch algorithms that scan the full dataset before each update of the model and make inexact variational approximations with mean-fie…

2016-02-19abs ↗pdf ↗

This paper develops a bootstrap method to estimate errors in Random Fourier Features.

problem Inability to estimate the error of Random Fourier Features approximations.
method Develops a bootstrap approach to numerically estimate the errors of RFF approximations.
result Specific, flexible, and adaptive error estimates for RFF approximations.

We present a scalable Bayesian model for low-rank factorization of massive tensors with binary observations. The proposed model has the following key properties: (1) in contrast to the models based on the logistic or probit likelihood, using a zero-truncated Poisson likelihood for binary data allows our model to scale …

2015-08-18abs ↗pdf ↗

A new Gaussian process regression method infers implicit manifold structure from data.

problem Scaling Gaussian process regression to high-dimensional data.
method Proposes a fully differentiable Gaussian process regression technique that infers implicit manifold structure from data.
result Improves predictive performance and calibration of standard Gaussian process regression in high-dimensional settings.

Stochastic variational inference (SVI) lets us scale up Bayesian computation to massive data. It uses stochastic optimization to fit a variational distribution, following easy-to-compute noisy natural gradients. As with most traditional stochastic optimization methods, SVI takes precautions to use unbiased stochastic g…

2014-06-13abs ↗pdf ↗

One approach for constructing copula functions is by multiplication. Given that products of cumulative distribution functions (CDFs) are also CDFs, an adjustment to this multiplication will result in a copula model, as discussed by Liebscher (J Mult Analysis, 2008). Parameterizing models via products of CDFs has some a…

2015-11-09abs ↗pdf ↗

New method decomposes sensory information from neurons into specific stimuli and features.

problem Understanding how much and what specific information neurons encode.
method Introduced axioms for meaningful stimulus-wise decomposition and derived a tractable solution using diffusion models.
result Can efficiently estimate contributions of specific stimuli and features to encoded information.

Analyzes generalization error in distributed linear regression.

problem Understanding generalization performance in distributed learning.
method Analytical characterization of generalization error in linear regression with distributed learning.
result Generalization error increases dramatically when nodes estimate close to the number of observations.

Study shows scaling up models doesn't always improve downstream tasks.

problem Understanding why scaling up models doesn't always improve downstream performance.
method Systematic study of 4800 experiments on various models, analyzing performance on 20 downstream tasks.
result Performance on downstream tasks saturates as model size increases, revealing a nonlinear relationship.

New insights into the top-K sparse softmax gating function for deep learning.

problem Understanding the theoretical effects of the top-K sparse softmax gating function on density and parameter estimations.
method Using a Gaussian mixture of experts, novel loss functions, and theoretical analysis.
result The convergence rates of density and parameter estimations are parametric under certain conditions, but slow under over-specified models.