Results 31 to 40 of about 330,630 (266)

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

open access: yesWater 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

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

open access: yesITM 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   +2 more
doaj   +1 more source

A Graph-Based Power Flow Method for Balanced Distribution Systems

open access: yesEnergies, 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

Optimization Model of Closed Loop Supply Chain Based on System Dynamics and Graph Theory

open access: yesInternational Journal of u- and e- Service, Science and Technology, 2016
In order to assist in the reverse recovery decision of emergency logistics in sudden natural disasters, this paper conducts the system modeling on the reverse recovery of reusable materials in several disaster areas from the perspective of system dynamics under the principle of rescue satisfaction preference.
Ying Xu, Xuemei Zhang, Yu Hong
openaire   +1 more source

Perturbative Noncommutative Quantum Gravity [PDF]

open access: yes, 2000
We study perturbative noncommutative quantum gravity by expanding the gravitational field about a fixed classical background. A calculation of the one loop gravitational self-energy graph reveals that only the non-planar graviton loops are damped by ...
't Hooft   +40 more
core   +4 more sources

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

open access: yesNew 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

Perfecting one-loop BCJ numerators in SYM and supergravity

open access: yesJournal of High Energy Physics, 2023
We take a major step towards computing D-dimensional one-loop amplitudes in general gauge theories, compatible with the principles of unitarity and the color-kinematics duality.
Alex Edison   +5 more
doaj   +1 more source

Robust Loop Closure Selection Based on Inter-Robot and Intra-Robot Consistency for Multi-Robot Map Fusion

open access: yesRemote Sensing, 2023
In multi-robot simultaneous localization and mapping (SLAM) systems, the system must create a consistent global map with multiple local maps and loop closures between robot poses.
Zhihong Chen   +4 more
doaj   +1 more source

Making multigraphs simple by a sequence of double edge swaps

open access: yes, 2021
We show that any loopy multigraph with a graphical degree sequence can be transformed into a simple graph by a finite sequence of double edge swaps with each swap involving at least one loop or multiple edge.
Sjöstrand, Jonas
core  

Non-orientable Boundary Superstring Field theory with Tachyon field

open access: yes, 2001
We use the BSFT method to study the unoriented open string field theory (type I). The partition function on the Mobius strip is calculated. We find that, at the one-loop level, the divergence coming from planar graph and unoriented graph cancel each ...
A. Bilal   +30 more
core   +3 more sources

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