Results 41 to 50 of about 326,821 (208)

The boundaries of dipole graphs and the complete bipartite graphs K_{2,n}

, 2013
We study the Seifert surfaces of a link by relating the embeddings of graphs by using induced graphs. As applications, we prove that every link $L$ is the boundary of an oriented surface which is obtained from a graph embedding of a complete bipartite ...
Kim, Dongseok
core   +1 more source

Comparison of matroid intersection algorithms for large circuit analysis [PDF]

, 1997
This paper presents two approaches to symbolic analysis of large analog integrated circuits via simplification during the generation of the symbolic expressions. Both techniques are examined from the point of view of matroid theory.
Fernández Fernández, Francisco Vidal, Galán, Mariano, Rodríguez Vázquez, Ángel Benito   +2 more
core   +1 more source

Modelling Selected Parameters of Power Grid Network in the South-Eastern Part of Poland: The Case Study

Energies, 2020
In this paper, a case study is conducted based on the real data obtained from the local Distribution System Operator (DSO) of electrical energy. The analyzed network represents connections and high-voltage switchgears of 110 kV. Selected graph parameters&
Piotr Hadaj, Dominik Strzałka
doaj   +1 more source

Voltage relaxation curve‐based state of charge estimation method with reduced measurement time

Electronics Letters, 2023
This paper proposes a method for estimating a battery's State of Charge using voltage relaxation curves. This method offers advantages over the conventional State of Charge estimation methods by reducing the measurement time of the Open Circuit Voltage ...
Suhyeon Lee, Dongho Lee
doaj   +1 more source

On the girth of voltage graph lifts

European Journal of Combinatorics, 2011
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Exoo, Geoffrey, Jajcay, Robert
openaire   +1 more source

Low-Voltage Topology Description Method Based on Graph-Relation Model for Distribution Grid With Large-Scale and High-Frequency Measurement

IEEE Access
The intricate structure and frequent online reconfiguration of low-voltage distribution lines result in massive, multi-version dynamic topologies that are challenging to acquire and analyze for operational applications.
Junfeng Qiao, Lin Peng, Aihua Zhou, Meizhao Liu, Pei Yang, Min Xu, Sen Pan   +6 more
doaj   +1 more source

Homology detection method for voltage sags based on space vector and maximum mean discrepancy

Energy Reports, 2022
A single voltage sag source may trigger multiple power quality monitors to record waveforms resulting in the redundancy of voltage sag monitoring data.
Wei Wang, Xijuan Yu, Dajie Tu, Haiyun Wang, Zaichi Zhang, Yuxuan Zhang   +5 more
doaj   +1 more source

Analysis of Chromatic Aberration Effects in Triple-Junction Solar Cells Using Advanced Distributed Models [PDF]

, 2011
The consideration of real operating conditions for the design and optimization of a multijunction solar cell receiver-concentrator assembly is indispensable.
Algora del Valle, Carlos, Espinet González, Pilar, García Vara, Iván, Rey-Stolle Prado, Ignacio   +3 more
core   +2 more sources

Measurement Method and Principle for Thoracic Impedance Graph

MATEC Web of Conferences, 2017
Thoracic impedance graph is an impedance change curve measured on the surface of the human chest. It reflects indirectly the volume change of the heart and large vessels in the thorax, and it includes rich information about physiological activities and ...
Hui Zhao, Shi-jiang Kuang, Bai-qing He, Zi-min Wang, Xiao-ling Cheng   +4 more
doaj   +1 more source

Reactive Power Optimization of a Distribution Network Based on Graph Security Reinforcement Learning

Applied Sciences
With the increasing integration of renewable energy, the secure operation of distribution networks faces significant challenges, such as voltage limit violations and increased power losses.
Xu Zhang, Xiaolin Gui, Pei Sun, Xing Li, Yuan Zhang, Xiaoyu Wang, Chaoliang Dang, Xinghua Liu   +7 more
doaj   +1 more source