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Deep learning (DL) has shown unprecedented performance for many image analysis and image enhancement tasks. Yet, solving large-scale inverse problems like tomographic reconstruction remains challenging for DL. These problems involve…

医学物理 · 物理学 2019-12-18 Lin Fu , Bruno De Man

Let $G$ be a simple graph of order $n$ with degree sequence $(d)=(d_1,d_2,\ldots,d_n)$ and conjugate degree sequence $(d^*)=(d_1^*,d_2^*,\ldots,d_n^*)$. In \cite{AkbariGhorbaniKoolenObudi2010,DasMojallalGutman2017} it was proven that…

组合数学 · 数学 2018-08-17 Ercan Altınışık , Nurşah Mutlu Varlıoglu

The solution of potential-driven steady-state flow in large networks is required in various engineering applications, such as transport of natural gas or water through pipeline networks. The resultant system of nonlinear equations depends…

计算物理 · 物理学 2026-03-20 Shriram Srinivasan , Kaarthik Sundar

The majority of model-based learned image reconstruction methods in medical imaging have been limited to uniform domains, such as pixelated images. If the underlying model is solved on nonuniform meshes, arising from a finite element method…

图像与视频处理 · 电气工程与系统科学 2021-07-12 William Herzberg , Daniel B. Rowe , Andreas Hauptmann , Sarah J. Hamilton

We develop an index theory for variational problems on noncompact quantum graphs. The main results are a spectral flow formula, relating the net change of eigenvalues to the Maslov index of boundary data, and a Morse index theorem, equating…

泛函分析 · 数学 2026-03-26 Daniele Garrisi , Alessandro Portaluri , Li Wu

A great deal of theoretical and experimental efforts have been devoted in the last decades to the study of long-wavelength photodetection mechanisms in field-effect transistors hosting two-dimensional (2D) electron systems. A particularly…

介观与纳米尺度物理 · 物理学 2019-02-13 Alessandro Principi , Denis Bandurin , Habib Rostami , Marco Polini

Generalized linear models (GLM) are link function based statistical models. Many supervised learning algorithms are extensions of GLMs and have link functions built into the algorithm to model different outcome distributions. There are two…

统计方法学 · 统计学 2019-05-02 Colleen M. Farrelly , Srikanth Namuduri , Uchenna Chukwu

Graph Neural Networks (GNNs) learn from graph-structured data by passing local messages between neighboring nodes along edges on certain topological layouts. Typically, these topological layouts in modern GNNs are deterministically computed…

机器学习 · 计算机科学 2024-02-27 Xinjian Zhao , Chaolong Ying , Tianshu Yu

We present an improved algorithm for computing the $4$-edge-connected components of an undirected graph in linear time. The new algorithm uses only elementary data structures, and it is simple to describe and to implement in the pointer…

数据结构与算法 · 计算机科学 2021-08-20 Loukas Georgiadis , Giuseppe F. Italiano , Evangelos Kosinas

A graph is a powerful concept for representation of relations between pairs of entities. Data with underlying graph structure can be found across many disciplines and there is a natural desire for understanding such data better. Deep…

机器学习 · 计算机科学 2019-01-25 Martin Simonovsky

Quantum hypergraph states form a generalisation of the graph state formalism that goes beyond the pairwise (dyadic) interactions imposed by remaining inside the Gaussian approximation. Networks of such states are able to achieve…

量子物理 · 物理学 2026-05-06 Abhijith Ravikumar , Darren W. Moore , Radim Filip

Drawings of non-planar graphs always result in edge crossings. When there are many edges crossing at small angles, it is often difficult to follow these edges, because of the multiple visual paths resulted from the crossings that slow down…

离散数学 · 计算机科学 2014-09-02 Yifan Hu , Lei Shi

We propose a new framework for the analysis of low-rank tensors which lies at the intersection of spectral graph theory and signal processing. As a first step, we present a new graph based low-rank decomposition which approximates the…

计算机视觉与模式识别 · 计算机科学 2016-11-16 Nauman Shahid , Francesco Grassi , Pierre Vandergheynst

Conventional deep neural nets (DNNs) initialize network parameters at random and then optimize each one via stochastic gradient descent (SGD), resulting in substantial risk of poor-performing local minima. Focusing on image interpolation…

计算机视觉与模式识别 · 计算机科学 2026-04-08 Xue Zhang , Bingshuo Hu , Gene Cheung

We design quantum algorithms for maximum matching. Working in the query model, in both adjacency matrix and adjacency list settings, we improve on the best known algorithms for general graphs, matching previously obtained results for…

数据结构与算法 · 计算机科学 2021-10-27 Shelby Kimmel , R. Teal Witter

Hypergraphs tackle the limitations of traditional graphs by introducing {\em hyperedges}. While graph edges connect only two nodes, hyperedges connect an arbitrary number of nodes along their edges. Also, the underlying message-passing…

机器学习 · 计算机科学 2024-09-17 Mehrad Soltani , Luis Rueda

Computing the Euler genus of a graph is a fundamental problem in graph theory and topology. It has been shown to be NP-hard by [Thomassen '89] and a linear-time fixed-parameter algorithm has been obtained by [Mohar '99]. Despite extensive…

数据结构与算法 · 计算机科学 2014-12-05 Ken-ichi Kawarabayashi , Anastasios Sidiropoulos

We present new quantum algorithms for Triangle Finding improving its best previously known quantum query complexities for both dense and spare instances.For dense graphs on $n$ vertices, we get a query complexity of $O(n^{5/4})$ without any…

量子物理 · 物理学 2016-10-13 Titouan Carette , Mathieu Laurière , Frédéric Magniez

Combining multiple knowledge graphs (KGs) across linguistic boundaries is a persistent challenge due to semantic heterogeneity and the complexity of graph environments. We propose a framework for cross-lingual graph fusion, leveraging the…

计算与语言 · 计算机科学 2026-03-24 Kaung Myat Kyaw , Khush Agarwal , Jonathan Chan

Dynamic graph learning (DGL) aims to learn informative and temporally-evolving node embeddings to support downstream tasks such as link prediction. A fundamental challenge in DGL lies in effectively modeling both the temporal dynamics and…

社会与信息网络 · 计算机科学 2025-06-10 Ling Wang