Results 21 to 30 of about 331,908 (277)

A New Graphical Representation of the Old Algebraic Structure

open access: yesJournal of Mathematics, 2023
The most recent advancements in algebra and graph theory enable us to ask a straightforward question: what practical use does this graph connected with a mathematical system have in the real world?
Muhammad Nadeem   +3 more
doaj   +1 more source

Design and Validation of Energy Management Strategy for Extended-Range Fuel Cell Electric Vehicle Using Bond Graph Method

open access: yesEnergies, 2021
In view of the aggravation of global pollution and greenhouse effects, fuel cell electric vehicles (FCEVs) have attracted increasing attention, owing to their ability to release zero emissions.
Ke Song   +4 more
doaj   +1 more source

The H-graph with equal masses in terms of multiple polylogarithms

open access: yesPhysics Letters B, 2021
The initial phase of the inspiral process of a binary system producing gravitational waves can be described by perturbation theory. At the third post-Minkowskian order a two-loop double box graph, known as H-graph contributes.
Philipp Alexander Kreer   +1 more
doaj   +1 more source

Feynman integrals for binary systems of black holes

open access: yesSciPost Physics Proceedings, 2022
The initial phase of the inspiral process of a binary black-hole system can be described by perturbation theory. At the third post-Minkowskian order a two-loop double box graph, known as H-graph, contributes.
Philipp Alexander Kreer, Robert Runkel, Stefan Weinzierl
doaj   +1 more source

The Study of the Theoretical Size and Node Probability of the Loop Cutset in Bayesian Networks

open access: yesMathematics, 2020
Pearl’s conditioning method is one of the basic algorithms of Bayesian inference, and the loop cutset is crucial for the implementation of conditioning.
Jie Wei, Yufeng Nie, Wenxian Xie
doaj   +1 more source

Hybrid Robust Model Predictive Based Controller for a Class of Multi-Agent Aerial dynamic Systems [PDF]

open access: yesAUT Journal of Electrical Engineering, 2022
The decentralized control of a multi-agent system with leader-follower consensus is investigated. The system is formulated in graph theory, and a general configuration for L-F formation is proposed.
Erfan Nejabat, Amirhosein Nikoofard
doaj   +1 more source

Scalar Matter Coupled to Quantum Gravity in the Causal Approach: Finite One-Loop Calculations and Perturbative Gauge Invariance [PDF]

open access: yes, 1999
Quantum gravity coupled to scalar massive matter fields is investigated within the framework of causal perturbation theory. One-loop calculations include matter loop graviton self-energy and matter self-energy and yield ultraviolet finite and cutoff-free
't Hooft   +20 more
core   +2 more sources

A New Method for Type Synthesis of 2R1T and 2T1R 3-DOF Redundant Actuated Parallel Mechanisms with Closed Loop Units

open access: yesChinese Journal of Mechanical Engineering, 2020
The current type synthesis of the redundant actuated parallel mechanisms is adding active-actuated kinematic branches on the basis of the traditional parallel mechanisms, or using screw theory to perform multiple getting intersection and union to ...
Yongquan Li, Yang Zhang, Lijie Zhang
doaj   +1 more source

Knot Invariants and New Weight Systems from General 3D TFTs [PDF]

open access: yes, 2011
We introduce and study the Wilson loops in a general 3D topological field theories (TFTs), and show that the expectation value of Wilson loops also gives knot invariants as in Chern-Simons theory.
Qiu, Jian, Zabzine, Maxim
core   +1 more source

Modular graph functions and odd cuspidal functions. Fourier and Poincaré series

open access: yesJournal of High Energy Physics, 2019
Modular graph functions are SL(2, ℤ)-invariant functions associated with Feynman graphs of a two-dimensional conformal field theory on a torus of modulus τ. For one-loop graphs they reduce to real analytic Eisenstein series. We obtain the Fourier series,
Eric D’Hoker, Justin Kaidi
doaj   +1 more source

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