Results 31 to 40 of about 331,908 (277)

Ladder and zig-zag Feynman diagrams, operator formalism and conformal triangles

Journal of High Energy Physics, 2023
We develop an operator approach to the evaluation of multiple integrals for multiloop Feynman massless diagrams. A commutative family of graph building operators H α for ladder diagrams is constructed and investigated.
S. E. Derkachov, A. P. Isaev, L. A. Shumilov   +2 more
doaj   +1 more source

Design of Strict Control-Lyapunov Functions for Quantum Systems with QND Measurements [PDF]

, 2011
We consider discrete-time quantum systems subject to Quantum Non-Demolition (QND) measurements and controlled by an adjustable unitary evolution between two successive QND measures.
Amini, Hadis, Mirrahimi, Mazyar, Rouchon, Pierre   +2 more
core   +4 more sources

PDSA Problem Solving: With a gentle introduction to double-loop learning, program theory, and causal graphs

, 2017
Tomás Aragón
openaire   +2 more sources

Fast Loop Closure Selection Method with Spatiotemporal Consistency for Multi-Robot Map Fusion

Applied Sciences, 2022
This paper presents a robust method based on graph topology to find the topologically correct and consistent subset of inter-robot relative pose measurements for multi-robot map fusion.
Wei Chen, Jian Sun, Qiang Zheng
doaj   +1 more source

Extracting Einstein from the loop-level double-copy

Journal of High Energy Physics, 2021
The naive double-copy of (multi) loop amplitudes involving massive matter coupled to gauge theories will generically produce amplitudes in a gravitational theory that contains additional contributions from propagating antisymmetric tensor and dilaton ...
John Joseph M. Carrasco, Ingrid A. Vazquez-Holm   +1 more
doaj   +1 more source

Spanning tree-based algorithm for hydraulic simulation of large-scale water supply networks

Water Science and Engineering, 2010
With the purpose of making calculation more efficient in practical hydraulic simulations, an improved algorithm was proposed and was applied in the practical water distribution field.
Huan-feng Duan, Guo-ping Yu
doaj   +1 more source

Unquenched flavor and tropical geometry in strongly coupled Chern-Simons-matter theories [PDF]

, 2011
We study various aspects of the matrix models calculating free energies and Wilson loop observables in supersymmetric Chern-Simons-matter theories on the three-sphere.
A Kapustin, A Kapustin, A Karch, B Chen, B Eynard, B Haghighat, C Núñez, CP Herzog, D Gaiotto, G Akemann, G Mikhalkin, G Veneziano, IR Klebanov, J Ambjørn, J Erdmenger, K-M Lee, M Aganagic, M Aganagic, M Mariño, M Mariño, M Mariño, Marcos Mariño, N Drukker, N Drukker, N Drukker, N Halmagyi, N Halmagyi, O Aharony, O Aharony, O Aharony, Pavel Putrov, R Emparan, Ricardo Couso Santamaría, S Hohenegger, S Iwao, S-J Rey, T Suyama, V Bouchard, Y Hikida   +38 more
core   +2 more sources

Analysis of a planetary gear modelled with a contour graph considering the decision making complexity of game-tree structures

ITM Web of Conferences, 2017
Analysis and synthesis of mechanisms is one of the fundamental tasks of engineering. Mechanisms can suffer from errors due to versatile reasons. Graph-based methods of analysis and synthesis of planetary gears constitute an alternative method for ...
Deptuła Adam, Drewniak Józef, Partyka Marian A.   +2 more
doaj   +1 more source

A Graph-Based Power Flow Method for Balanced Distribution Systems

Energies, 2018
A power flow method based on graph theory is presented for three-phase balanced distribution systems. The graph theory is used to describe the power network and facilitate the derivation of the relationship between bus Currents and the bus Voltage Bias ...
Tao Shen, Yanjun Li, Ji Xiang
doaj   +1 more source

Network dismantling on factor graphs: break long loops and spare local structures

New Journal of Physics, 2021
A new solution framework for the task of network dismantling is recently developed, based on a two-scale bipartite factor-graph representation of the original graph where local structures are abstracted as factor nodes.
Tianyi Li
doaj   +1 more source