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Event extraction has gained extensive research attention due to its broad range of applications. However, the current mainstream evaluation method for event extraction relies on token-level exact match, which misjudges numerous…

计算与语言 · 计算机科学 2025-03-05 Yi-Fan Lu , Xian-Ling Mao , Tian Lan , Heyan Huang , Chen Xu , Xiaoyan Gao

The Levenberg-Marquardt (LM) optimization algorithm has been widely used for solving machine learning problems. Literature reviews have shown that the LM can be very powerful and effective on moderate function approximation problems when…

机器学习 · 计算机科学 2021-11-12 Wenyi Wang , John Taylor , Biswajit Bala

A non self-similar change of coordinates provides improved matching asymptotics of the solutions of the fast diffusion equation for large times, compared to already known results, in the range for which Barenblatt solutions have a finite…

偏微分方程分析 · 数学 2011-12-20 Jean Dolbeault , Giuseppe Toscani

The integration of extensive, dynamic knowledge into Large Language Models (LLMs) remains a significant challenge due to the inherent entanglement of factual data and reasoning patterns. Existing solutions, ranging from non-parametric…

计算与语言 · 计算机科学 2026-02-11 Wenxuan Xie , Yujia Wang , Xin Tan , Chaochao Lu , Xia Hu , Xuhong Wang

We study the problem of estimating the mean of a distribution in high dimensions when either the samples are adversarially corrupted or the distribution is heavy-tailed. Recent developments in robust statistics have established efficient…

数据结构与算法 · 计算机科学 2021-01-20 Samuel B. Hopkins , Jerry Li , Fred Zhang

We present an extension of local sensitivity analysis, also referred to as the perturbation approach for uncertainty quantification, to Bayesian inverse problems. More precisely, we show how moments of random variables with respect to the…

数值分析 · 数学 2026-04-06 Jürgen Dölz , David Ebert

As a fine-grained segmentation task, human parsing is still faced with two challenges: inter-part indistinction and intra-part inconsistency, due to the ambiguous definitions and confusing relationships between similar human parts. To…

计算机视觉与模式识别 · 计算机科学 2020-08-25 Xinyan Zhang , Yunfeng Wang , Pengfei Xiong

Large language models (LLMs) have significantly advanced various natural language processing (NLP) tasks. Recent research indicates that moderately-sized LLMs often outperform larger ones after task-specific fine-tuning. This study focuses…

计算与语言 · 计算机科学 2024-10-14 Minghao Wu , Thuy-Trang Vu , Lizhen Qu , George Foster , Gholamreza Haffari

Large Language Models (LLMs) are large-scale pretrained models that have achieved remarkable success across diverse domains. These successes have been driven by unprecedented complexity and scale in both data and computations. However, due…

We propose a continuous-time formulation of persistent contrastive divergence (PCD) for maximum likelihood estimation (MLE) of unnormalised densities. Our approach expresses PCD as a coupled, multiscale system of stochastic differential…

机器学习 · 统计学 2025-10-03 Paul Felix Valsecchi Oliva , O. Deniz Akyildiz , Andrew Duncan

Social goods, such as healthcare, smart city, and information networks, often produce ordered event data in continuous time. The generative processes of these event data can be very complex, requiring flexible models to capture their…

机器学习 · 计算机科学 2020-12-29 Shuang Li , Shuai Xiao , Shixiang Zhu , Nan Du , Yao Xie , Le Song

Large pre-trained language models (LPLM) have shown spectacular success when fine-tuned on downstream supervised tasks. Yet, it is known that their performance can drastically drop when there is a distribution shift between the data used…

计算与语言 · 计算机科学 2022-11-04 Kostadin Cvejoski , Ramsés J. Sánchez , César Ojeda

This paper applies the Recursive Projection Method (RPM) to the problem of finding the effective mechanical response of a periodic heterogeneous solid. Previous works apply the Fast Fourier Transform (FFT) in combination with various…

计算工程、金融与科学 · 计算机科学 2020-03-18 Xiaoyao Peng , Dhriti Nepal , Kaushik Dayal

In the field of chemistry, there have been many attempts to predict the properties of unknown compounds from statistical models constructed using machine learning. In an area where many known compounds are present (the interpolation area),…

机器学习 · 计算机科学 2020-09-22 Kohei Numata , Kenichi Tanaka

We discuss the generalized eigenvalue problem for computing energies and matrix elements in lattice gauge theory, including effective theories such as HQET. It is analyzed how the extracted effective energies and matrix elements converge…

高能物理 - 格点 · 物理学 2009-04-30 Benoit Blossier , Michele Della Morte , Georg von Hippel , Tereza Mendes , Rainer Sommer

Lightcone distribution amplitudes (LCDAs) within the framework of heavy quark effective theory (HQET) play a crucial role in the theoretical description of weak decays of heavy bottom mesons. However, the first-principle determination of…

高能物理 - 格点 · 物理学 2025-04-04 Xue-Ying Han , Jun Hua , Cai-Dian Lü , Andreas Schäfer , Yushan Su , Wei Wang , Ji Xu , Yibo Yang , Jian-Hui Zhang , Qi-An Zhang , Shuai Zhao

Density functional theory is the standard theory for computing the electronic structure of materials, which is based on a functional that maps the electron density to the energy. However, a rigorous form of the functional is not known and…

材料科学 · 物理学 2021-12-02 Ryo Nagai , Ryosuke Akashi , Osamu Sugino

Large deviation theory and instanton calculus for stochastic systems are widely used to gain insight into the evolution and probability of rare events. At its core lies the realization that rare events are, under the right circumstances,…

统计力学 · 物理学 2021-05-26 Mnerh Alqahtani , Tobias Grafke

Long-term Time Series Forecasting is crucial across numerous critical domains, yet its accuracy remains fundamentally constrained by the receptive field bottleneck in existing models. Mainstream Transformer- and Multi-layer Perceptron…

计算工程、金融与科学 · 计算机科学 2025-11-13 Weixu Wang , Xiaobo Zhou , Xin Qiao , Lei Wang , Tie Qiu

We describe a fast method for solving elliptic partial differential equations (PDEs) with uncertain coefficients using kernel interpolation at a lattice point set. By representing the input random field of the system using the model…

数值分析 · 数学 2023-08-15 Vesa Kaarnioja , Frances Y. Kuo , Ian H. Sloan
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