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Probabilistic Temporal Tensor Factorization (PTTF) is an effective algorithm to model the temporal tensor data. It leverages a time constraint to capture the evolving properties of tensor data. Nowadays the exploding dataset demands a large…

机器学习 · 统计学 2016-11-14 Guangxi Li , Zenglin Xu , Linnan Wang , Jinmian Ye , Irwin King , Michael Lyu

The spatial and temporal aspects of system properties are crucial for many types of systems. In this short paper, we present a TopFunST framework to analyse topological dependencies among features of the system, covering also spatial and…

形式语言与自动机理论 · 计算机科学 2025-12-30 Maria Spichkova

The transport equations for polarized radiation transfer in non-Riemannian, Weyl-Cartan type space-times are derived, with the effects of both torsion and non-metricity included. To obtain the basic propagation equations we use the tangent…

广义相对论与量子宇宙学 · 物理学 2009-11-11 K. S. Cheng , T. Harko , X. Y. Wang

In this work, we use the concept of quaternion time and demonstrate that it can be applied for description of four-dimensional space-time intervals. We demonstrate that the quaternion time interval together with the finite speed of light…

综合物理 · 物理学 2021-06-14 Viktor Ariel

Previously a mathematical approach has been developed for calculation of the propagation time of a signal, emitted by a moving along an elliptical orbit satellite, with account also for the General Relativity Theory (GRT) effects. The…

综合物理 · 物理学 2025-01-09 Bogdan G. Dimitrov

The transit timing variation technique (TTV) has been widely used to detect and characterize multiple planetary systems. Due to the observational biases imposed mainly by the photometric conditions and instrumentation and the high…

地球与行星天体物理 · 物理学 2016-07-14 C. von Essen , S. Cellone , M. Mallonn , B. Tingley , M. Marcussen

We propose the time-delayed transformer (TD-TF), a simplified transformer architecture for data-driven modeling of unsteady spatio-temporal dynamics. TD-TF bridges linear operator-based methods and deep sequence models by showing that a…

机器学习 · 计算机科学 2026-02-10 Albert Alcalde , Markus Widhalm , Emre Yılmaz

The problem of finding null geodesics in a stationary Lorentzian spacetime is known to to be equivalent to finding the geodsics of a Randers-Finlser structure. This latter problem is equivalent to finding the motion of charged particles…

广义相对论与量子宇宙学 · 物理学 2017-08-10 G. W. Gibbons

This paper proposes an efficient parameterization of the Room Transfer Function (RTF). Typically, the RTF rapidly varies with varying source and receiver positions, hence requires an impractical number of point to point measurements to…

声音 · 计算机科学 2015-05-19 Prasanga Samarasinghe , Thushara Abhayapala , Mark Poletti , Terence Betlehem

Localization and synchronization are very important in many wireless applications such as monitoring and vehicle tracking. Utilizing the same time of arrival (TOA) measurements for simultaneous localization and synchronization is…

信息论 · 计算机科学 2016-01-18 Weijie Yuan , Nan Wu , Bernhard Etzlinger , Hua Wang , Jingming Kuang

Despite the fact that quantum gravity theory still remains elusive, it is generally expected that it will bring the picture of a space-time foam at short distances leading to Lorenz Invariance Violation (LIV) manifested e.g. by energy…

天体物理学 · 物理学 2015-05-13 Marek Biesiada , Aleksandra Piórkowska

Air pollution, especially particulate matter 2.5 (PM2.5), is a pressing concern for public health and is difficult to estimate in developing countries (data-poor regions) due to a lack of ground sensors. Transfer learning models can be…

机器学习 · 计算机科学 2024-06-25 Shrey Gupta , Yongbee Park , Jianzhao Bi , Suyash Gupta , Andreas Züfle , Avani Wildani , Yang Liu

Spectral methods provide highly accurate numerical solutions for partial differential equations, exhibiting exponential convergence with the number of spectral nodes. Traditionally, in addressing time-dependent nonlinear problems, attention…

We introduce observables associated with the space-time position of a quantum point defined by the intersection of two light pulses. The time observable is canonically conjugated to the energy. Conformal symmetry of massless quantum fields…

量子物理 · 物理学 2009-10-30 Marc-Thierry Jaekel , Serge Reynaud

We reexamined the gravitational time delay of light, allowing for various models of modified gravity. We clarify the dependence of the time delay (and induced frequency shift) on modified gravity models and investigate how to distinguish…

广义相对论与量子宇宙学 · 物理学 2008-11-26 Hideki Asada

Time-dependent density-functional theory (TDDFT) is a computationally efficient first-principles approach for calculating optical spectra in insulators and semiconductors, including excitonic effects. We show how exciton wave functions can…

材料科学 · 物理学 2020-12-29 Jared R. Williams , Nicolas Tancogne-Dejean , Carsten A. Ullrich

Master-field simulations offer an approach to lattice QCD in which calculations are performed on a small number of large-volume gauge-field configurations. The latter is advantageous for simulations in which the global topological charge is…

高能物理 - 格点 · 物理学 2022-12-20 Mattia Bruno , Marco Cè , Anthony Francis , Jeremy R. Green , Max Hansen , Savvas Zafeiropoulos

The real-time electronic dynamics on material surfaces is critically important to a variety of applications. However, their simulations have remained challenging for conventional methods such as the time-dependent density-functional theory…

化学物理 · 物理学 2015-06-16 Rulin Wang , Dong Hou , Xiao Zheng

Real-Time Time-Dependent Density Functional Theory (TDDFT) has become an attractive tool to model quantum dynamics on a first-principles Density Functional Theory level. In recent years, several developments and applications in this field…

计算物理 · 物理学 2020-08-21 Joscha Hekele , Peter Kratzer

This paper introduces a new market-implied object, Time to Transition (TtT), extracted from the difference between two selected nodes of the greenium term structure. TtT is defined as the latent waiting time until this cross-maturity…

数理金融 · 定量金融 2026-05-06 Lorenzo Mercuri , Andrea Perchiazzo , Edit Rroji , Ilaria Stefano