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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.

169,051 papers · 148 categories

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48 results for user-defined relations

R-GPM enables efficient graph pattern mining through user-defined relations.

problem Efficient graph pattern mining through user-defined relations.
method Parallel computing framework with MCMC sampling algorithm and optimizations.
result Efficient estimators for graph pattern statistics with up to 3-orders-of-magnitude computational cost reduction.

Semi-supervised learning (SSL) has become important in current data analysis applications, where the amount of unlabeled data is growing exponentially and user input remains limited by logistics and expense. Constrained clustering, as a subclass of SSL, makes use of user input in the form of relationships between data …

2018-05-06abs ↗pdf ↗

A new probabilistic polygonal curve representation using Gaussian Mixture Models.

problem Capturing curves with uncertainty in both tangent and normal directions.
method Probabilistic polygonal approximation with Gaussian Mixture Model (GMM).
result The GMM accurately captures the local geometry and uncertainty of curves.

This paper optimizes clustering interpretability by balancing value and user-defined features.

problem Generating interpretable clusters in graph data.
method Proposes a β-interpretable clustering algorithm that ensures at least β fraction of nodes share the same feature value.
result Empirical demonstration of the benefits of the proposed approaches in generating interpretable clusters.

Improves interpretability of neural network intermediate layers by making concept activations more robust and effective.

problem Challenges in interpreting neural network decisions and learning in intermediate layers due to opacity and shared interactions.
method Proposes A-CAV to increase effectiveness and employs Gram-Schmidt process to improve robustness.
result Significant improvement in recall rate of concept images from 18.35% to 76.83% for VGG16, with reduced variance in recall across different random seeds.

ARMS automates fraud detection rules to improve efficiency and accuracy.

problem Maintaining effective fraud detection rules over time and reducing manual review.
method ARMS uses heuristic search and a user-defined loss-function to optimize and manage rules.
result ARMS can maintain original systems' performance with only a fraction of the rules.

The paper identifies and analyzes subjective class issues in user-generated data.

problem Subjective labels in user-generated data can lead to biased and manipulated results.
method Defined subjective and objective classes, proposed a framework for detecting subjective labels.
result Data mining practitioners can detect and avoid subjective class issues early in their projects.

We propose some axioms for hierarchical clustering of probability measures and investigate their ramifications. The basic idea is to let the user stipulate the clusters for some elementary measures. This is done without the need of any notion of metric, similarity or dissimilarity. Our main results then show that for e…

2015-08-15abs ↗pdf ↗

ED2 uses active learning to detect errors with minimal labeled data.

problem Error detection requires user-defined parameters and rules, limiting user expertise.
method ED2 employs a two-stage active learning approach with multi-classifier sampling and multi-column features.
result ED2 achieves high detection accuracy with less than 1% labeled data.

Bayesian optimization has recently emerged as a popular and efficient tool for global optimization and hyperparameter tuning. Currently, the established Bayesian optimization practice requires a user-defined bounding box which is assumed to contain the optimizer. However, when little is known about the probed objective…

2015-08-14abs ↗pdf ↗

GACELA fills long gaps in musical audio with a GAN and context conditioning.

problem Restoring long gaps in musical audio with varying complexity and duration.
method Generative adversarial network (GAN) with five parallel discriminators and context conditioning.
result Reduced artifacts in inpaintings from unacceptable to mildly disturbing.

Approximate Bayesian Computation (ABC) provides methods for Bayesian inference in simulation-based stochastic models which do not permit tractable likelihoods. We present a new ABC method which uses probabilistic neural emulator networks to learn synthetic likelihoods on simulated data -- both local emulators which app…

2018-05-23abs ↗pdf ↗

Improves Gower's similarity for mixed-type variables with automatic weighting.

problem Handling missing values and unbalanced variable contributions in Gower's similarity for mixed-type data.
method Automatic weighting scheme minimizing differences in correlation between contributing dissimilarities and weighted Gower's dissimilarity.
result Improved performance in classification and imputation of missing values.

Extracts controllable models from videos of real-world activities.

problem Creating realistic and controllable character models from video data.
method Two networks: one for pose and control signal to next pose, and another for pose, new pose, and background to output frame.
result High-quality, controllable character models can be generated from arbitrary videos.

FISHDBC clusters arbitrary data with flexible, scalable, and hierarchical features.

problem Clustering arbitrary data with arbitrary distance functions efficiently.
method Flexible, incremental, scalable, hierarchical density-based clustering algorithm.
result Flexible clustering of arbitrary data without feature extraction.

One of the key challenges in applying reinforcement learning to real-life problems is that the amount of train-and-error required to learn a good policy increases drastically as the task becomes complex. One potential solution to this problem is to combine reinforcement learning with automated symbol planning and utili…

2018-06-28abs ↗pdf ↗

UAPCA projects uncertain data to low dimensions using GMMs.

problem Uncertain multidimensional data not well described by normal distributions.
method Model data with Gaussian mixture models, derive UAPCA projection from general formulation.
result Low-dimensional projections better represent multidimensional distributions.

In most classification tasks there are observations that are ambiguous and therefore difficult to correctly label. Set-valued classifiers output sets of plausible labels rather than a single label, thereby giving a more appropriate and informative treatment to the labeling of ambiguous instances. We introduce a framewo…

2016-09-02abs ↗pdf ↗

Following the seminal idea of Tukey, data depth is a function that measures how close an arbitrary point of the space is located to an implicitly defined center of a data cloud. Having undergone theoretical and computational developments, it is now employed in numerous applications with classification being the most po…

2016-08-14abs ↗pdf ↗

A new deep generative model captures global dependencies without supervision.

problem Global modeling in deep generative models.
method Non-i.i.d. variational autoencoders with mixture model and global Gaussian latent variable.
result Captures interpretable disentangled representations and domain alignment.

The paradigm of multi-task learning is that one can achieve better generalization by learning tasks jointly and thus exploiting the similarity between the tasks rather than learning them independently of each other. While previously the relationship between tasks had to be user-defined in the form of an output kernel, …

2015-11-18abs ↗pdf ↗