Results 61 to 70 of about 196,468 (204)

Relationship Between Mean Kärger Model Water Exchange Rate and Intercellular Water Transition Rate

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To derive a quantitative relationship between the mean Kärger model (KM) water exchange rate and the mean intercellular water transition rate applicable to brain and other complex biological tissues. Theory and Methods The mean KM water exchange rate applies to any KM, accommodates an arbitrary number of compartments, and can be ...
Jens H. Jensen, Hunter G. Moss, Thorsten Feiweier, Andreana Benitez   +3 more
wiley   +1 more source

Nonlocal Low-Rank Nonnegative Tensor Factorization for Hyperspectral Unmixing

, 2020
Hyperspectral unmixing decomposes hyperspectral images (HSI) into a collection of constituent materials or end-members and their fractions, i.e., abundances. Nonnegative tensor factorization (NTF) has been utilized thanks to its ability of preserving all
Jun Zhou, Xiong, F, Yuntao Qian, Zhou, J, Jianfeng Lu, Lu, J, Qian, K, Kun Qian, Fengchao Xiong, Qian, Y   +9 more
core   +1 more source

User social influence analysis based on constrained nonnegative tensor factorization

Tongxin xuebao, 2016
Existing models for measuring user social influence fail to integrate both opinion and topic information.Therefore,a new constrained nonnegative tensor factorization method combining user’s opinion and the topical relevance was proposed.The method ...
Jing-jing WEI, Chang CHEN, Xiang-wen LIAO, Guo-long CHEN, Xue-qi CHENG   +4 more
doaj   +2 more sources

An S-type upper bound for the largest singular value of nonnegative rectangular tensors

Open Mathematics, 2016
An S-type upper bound for the largest singular value of a nonnegative rectangular tensor is given by breaking N = {1, 2, … n} into disjoint subsets S and its complement. It is shown that the new upper bound is smaller than that provided by Yang and Yang (
Zhao Jianxing, Sang Caili
doaj   +1 more source

Mixed feelings, mixed outcomes? When emotionally ambivalent framing enhances idea appreciation

Strategic Entrepreneurship Journal, EarlyView.
Abstract Research Summary Despite growing interest in how linguistic strategies shape audience responses to innovative ideas, prior evidence on the benefits of using emotional language remains mixed. Building on research on emotional ambivalence and social evaluation, we introduce the concept of emotionally ambivalent framing (i.e., the combination of ...
Donato Cutolo, Denise Falchetti, Henrik Wesemann Lekkas   +2 more
wiley   +1 more source

Accelerated stochastic gradient for nonnegative tensor completion and parallel implementation

, 2021
Summarization: We consider the problem of nonnegative tensor completion. We adopt the alternating optimization framework and solve each nonnegative matrix completion problem via a stochastic variation of the accelerated gradient algorithm.
Κολομβακης Χρηστος(http://users.isc.tuc.gr/~ckolomvakis), Σιαμινου Ιωαννα(http://users.isc.tuc.gr/~isiaminou), Liavas Athanasios(http://users.isc.tuc.gr/~aliavas), Siaminou Ioanna(http://users.isc.tuc.gr/~isiaminou), Kolomvakis Christos(http://users.isc.tuc.gr/~ckolomvakis), Παπαγιαννακος Ιωαννης-Μαριος(http://users.isc.tuc.gr/~ipapagiannakos), Λιαβας Αθανασιος(http://users.isc.tuc.gr/~aliavas), Papagiannakos Ioannis-Marios(http://users.isc.tuc.gr/~ipapagiannakos)   +7 more
core   +1 more source

World Models for Robotic Manipulation: A Survey

SmartBot, EarlyView.
World models enable robots to anticipate how candidate actions may alter object configurations, contact states, and scene geometry before physical execution. This survey examines world models for robotic manipulation as action‐conditioned predictive systems and organizes the literature according to predicted representations, interfaces between ...
Fangyuan Wang, Ziyuan Wang, Guorui Pei, Mengshi Zhang, Canxi Liang, Jun Hu, Zhongxuan Li, Jinsong Wu, Ning Han, Zeqing Zhang, Jiaming Qi, Hongmin Wu, Shiyao Zhang, Pai Zheng, Jia Pan, David Navarro‐Alarcon, Sichao Liu, Peng Zhou   +17 more
wiley   +1 more source

Some inequalities on the spectral radius of nonnegative tensors

Open Mathematics, 2020
The eigenvalues and the spectral radius of nonnegative tensors have been extensively studied in recent years. In this paper, we investigate the analytic properties of nonnegative tensors and give some inequalities on the spectral radius.
Ma Chao, Liang Hao, Xie Qimiao, Wang Pengcheng   +3 more
doaj   +1 more source

Graph‐Laplacian modeling of spatiotemporal effects for house price estimation

Real Estate Economics, EarlyView.
Abstract Many variables involve the modeling of spatial effects, and their dynamics over time. This article presents a linear model in which spatiotemporal random effects are modeled by graph‐Laplacians. A graph‐Laplacian flexibly encodes adjacency in both space and time, in our case not depending on unknown parameters. The graph‐Laplacian can be input
Willem P Sijp, Marc K. Francke
wiley   +1 more source

Maximal and typical nonnegative ranks of nonnegative tensors

, 2018
Let $N_1, \ldots, N_d$ be positive integers with $N_1\leq\cdots\leq N_d$. Set $N=N_1\cdots N_{d-1}$. We show in this paper that an integer $r$ is a typical nonnegative rank of nonnegative tensors of format $N_1\times\cdots\times N_d$ if and only if $r\leq N$ and $r$ is greater than or equals to the generic rank of tensors over $\mathbb{C}$ of format ...
Sumi, Toshio, Miyazaki, Mitsuhiro, Sakata, Toshio   +2 more
openaire   +2 more sources