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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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116231347462 · Jun 202019922001200920182026
48 results for feature compactness

Compact bilinear pooling approximates covariance features for faster training.

problem Efficiently approximating covariance features for faster training.
method Compact bilinear pooling extended to polynomial approximations of covariance features.
result The proposed method achieves comparable accuracy with fewer dimensions.

Heating up softmax improves feature compactness for better metric learning.

problem Learning embeddings for samples of the same category to be compact while different categories spread out.
method Training classifiers with different temperature values of softmax function, then heating up the classifier.
result Classifier with increasing temperatures achieves state-of-the-art performance on metric learning benchmarks.

Proposes a new CNN approach for multimodal biometric identification.

problem Improving biometric identification accuracy across multiple modalities.
method Uses a bank of modality-specific CNNs, fuses their outputs, and optimizes the system.
result Significantly outperforms unimodal systems and demonstrates reduction in parameters.

GOTabPFN improves tabular model performance with compact tokenization for HDLSS data.

problem Making tabular models effective for high-dimensional, low-sample size data without retraining.
method Introducing Graph-guided Ordering with Local Refinement (GO-LR) and Neuro-Inspired Subunit Compression (NSC) to create compact meta-features.
result GOTabPFN improves stability and accuracy in tabular benchmarks with compact tokenization.

Kernel approximation using randomized feature maps has recently gained a lot of interest. In this work, we identify that previous approaches for polynomial kernel approximation create maps that are rank deficient, and therefore do not utilize the capacity of the projected feature space effectively. To address this chal…

2013-12-17abs ↗pdf ↗

Unsupervised segmentation learns features without labels, improving accuracy.

problem Discover and localize semantically meaningful categories in images without annotations.
method Separates feature learning from cluster compactification; distills unsupervised features into discrete semantic labels using a contrastive loss function.
result Significant improvement over prior state of the art on semantic segmentation challenges.

Paper introduces template functions for featurizing persistence diagrams.

problem Featurizing persistence diagrams for machine learning.
method Characterizes compactness, constructs dense subsets of continuous functions.
result Template functions enable supervised learning with persistence diagrams.

Compact-CNN outperforms traditional methods in SSVEP classification.

problem Decoding SSVEPs without domain-specific knowledge.
method Compact convolutional neural network (Compact-CNN) for automatic feature extraction.
result Across subject mean accuracy of 80% (chance 8.3%) using Compact-CNN.

A novel feature representation method for non-image based features.

problem Inability of Convolutional Neural Networks for non-image based features or features without spatial correlations.
method REFINED: Representation of Features as Images with Neighborhood Dependencies.
result Higher prediction accuracy compared to existing methodologies.

Paper uses RL and DCAE to classify large unstructured data with fewer features.

problem Classifying large unstructured data with high precision using fewer features.
method Deep Convolutional Autoencoder (DCAE) for feature learning and Double DQN/Retrace RL algorithms for policy optimization.
result The approach achieves high classification precision with fewer features than traditional methods.

Study investigates classification with unknown label noise in non-compact feature spaces.

problem Classification in the presence of unknown class-conditional label noise in non-compact feature spaces.
method Determines minimax optimal learning rates and presents an adaptive algorithm for classification.
result Optimal learning rates differ from those without label noise, displaying interesting threshold behavior.

MeliusNet improves binary neural networks to match MobileNet-v1 accuracy.

problem Achieving high accuracy with binary neural networks on mobile devices.
method Alternating DenseBlocks and ImprovementBlocks to increase feature capacity and quality.
result MeliusNet matches MobileNet-v1 accuracy on ImageNet, improving binary network performance.

Although the recent progress in the deep neural network has led to the development of learnable local feature descriptors, there is no explicit answer for estimation of the necessary size of a neural network. Specifically, the local feature is represented in a low dimensional space, so the neural network should have mo…

2017-06-16abs ↗pdf ↗

Paper proposes angular loss for better face recognition and object classification.

problem Improving intra-class compactness and preventing overfitting in face recognition and object classification.
method Angular loss function to maximize angular gradient, reducing overfitting and requiring only one adjustable constant.
result Our method outperforms other methods in accuracy, discriminative information, and time-efficiency.

Proposes joint domain alignment and discriminative feature learning for deep domain adaptation.

problem Reduces domain shift and misclassification of target domain samples.
method Instance-based and center-based discriminative feature learning methods.
result Learning discriminative features in shared feature space significantly boosts deep domain adaptation performance.

The asymptotic dimension theory was founded by Gromov in the early 90s. In this paper we give a survey of its recent history where we emphasize two of its features: an analogy with the dimension theory of compact metric spaces and applications to the theory of discrete groups.

2007-03-26abs ↗pdf ↗

As is well-known for compact Riemann surfaces, eigenvalues of the Laplacianbare distributed discretely and most of eigenvalues vary viewed as functions on the Teichmuller space. We discuss a new feature in the Lorentzian geometry, or more generally, in pseudo-Riemannian geometry. One of the distinguished features is th…

2016-09-20abs ↗pdf ↗

This work uses decision trees to encode relevant features and their interactions into neural networks, improving model performance.

problem Overfitting in neural networks with many irrelevant variables.
method Defines a mapping to encode decision tree extracted relationships into a neural network.
result The approach outperforms fully connected neural networks and tree-based methods.

Modeling preference rankings with salient features to explain irrational choices.

problem Estimating rankings from noisy pairwise comparisons with irrational choices.
method Salient feature preference model with maximum likelihood estimation.
result Strong performance of maximum likelihood estimation on synthetic and real data.

We study solutions for the Hodge laplace equation Δu=ωΔu=ω on pp forms with Lr\displaystyle L^{r} estimates for r>1.\displaystyle r>1. Our main hypothesis is that ΔΔ has a spectral gap in L2.\displaystyle L^{2}. We use this to get non classical Lr\displaystyle L^{r} Hodge decomposition theorems. An interesting feature is …

2015-06-27abs ↗pdf ↗

Compact clustering in latent space improves semi-supervised learning.

problem Improving semi-supervised learning with unlabeled data.
method Dynamic graph creation over embeddings, label propagation, and Markov chain regularization.
result Compact clustering in latent space facilitates better separation and separation of labeled and unlabeled data.

In this paper, we consider the joint task of simultaneously optimizing (i) the weights of a deep neural network, (ii) the number of neurons for each hidden layer, and (iii) the subset of active input features (i.e., feature selection). While these problems are generally dealt with separately, we present a simple regula…

2016-07-02abs ↗pdf ↗

CardiCat generates synthetic data for high-cardinality tabular datasets.

problem Learning complexities of high-cardinality categorical features in tabular data.
method Substitutes one-hot encoding with regularized dual encoder-decoder embedding layers.
result Generates high-quality synthetic data with a smaller parameter space.

The article constructs strong Carrollian geometries at infinity for Ricci flat Einstein manifolds.

problem Understanding projective and Carrollian geometries at infinity for Ricci flat Einstein manifolds.
method Developed a new type of Cartan geometry based on non-effective homogeneous models for projective geometry.
result Carrollian geometries are determined by the projective compactification data of Ricci flat Einstein manifolds.

Tactile information is important for gripping, stable grasp, and in-hand manipulation, yet the complexity of tactile data prevents widespread use of such sensors. We make use of an unsupervised learning algorithm that transforms the complex tactile data into a compact, latent representation without the need to record g…

2016-06-23abs ↗pdf ↗

Tensor neural network improves human pose classification from 3D skeleton data.

problem Efficiently processing spatiotemporal data for human pose classification.
method Proposes a tensor-based neural network with three components: spatiotemporal feature construction, tensor fusion, and tensor-based neural network processing.
result Achieves state-of-the-art performance in human pose classification.