bluuebunny/crossref_metadata_2025 huggingface dataset:
Le motif de l’araignée dans le conte de
l’Infanticide
Authors: Barale Elisabetta
Published: April 2023

Cette étude se penche sur l’image de l’araignée
et le motif de l’empoisonnement par son ingestion dans le conte de
l’Infanticide. Rédigé par le(s) compilateur(s) de
la seconde Vie des Pères à partir de deux anecdotes des
Vitae fratrum ordinis Praedicatorum, ce récit jouit
d’un grand succès témoigné, entre autres, par quatre réécritures en
prose sous la forme de miracles mariaux composées entre le XIVe et le
XVe siècle. Deux lectures complémentaires de ces textes – en
réseau et en diachronie – se révèlent utiles afin de comprendre le rôle des
arachnides dans le bestiaire marial occidental aussi bien que
l’évolution de leur symbolique au fil du temps. En plus de confirmer
l’ambiguïté de ces bêtes qui, sans cacher leur caractère inquiétant, se
font exécutrices du dessein divin, les résultats de nos analyses invitent à
envisager davantage la fin du Moyen Âge comme une époque de transition vers la
première modernité. Les changements concernant le traitement de la figure de
l’araignée – qui dans la Vie des Pères incarne les
péchés de l’héroïne du conte, mais qui est ensuite de plus en plus
associée à son état de maladie mentale, voire à la mélancolie – en
constitueraient un exemple.
Délaisser l’écorce et goûter du ‘fruict interieur’
Authors: Cifarelli Paola
Published: April 2023

The prose fable collection known as the Anonymous of 1547 was a
real bestseller, with at least twenty editions published before the end of the
16th century. This translation differs from the other three that appeared
between 1480 and the middle of the 16th century in its intention to combine
tradition and innovation with regard to the order of the tales, the choice of
sources and the use of prose; the intention to follow the pattern of an emerging
‘bon usage’ characterises this translation, intended to provide an example of
elegant prose. After having highlighted the specificities of this collection,
two annotated copies will be described, in order to anchor the hypotheses
concerning the target audience on concrete data.
A new approach to scribal abbreviation in the Bestiaire in Merton College Library, MS
249
Authors: Dows-Miller Sebastian
Published: April 2023

Macro-level, quantitative approaches to certain scribal features such as spelling have offered much to the
development of the field of manuscript studies, and yet the evidence afforded by abbreviation remains hitherto largely unexamined.
This paper examines a bestiary found within a discrete section of a codex in Merton College Library in Oxford, using it as a case
study to assess the value of examining features of scribal abbreviation through mixed-method analysis. Such an approach has
utility in allowing us to reinforce or challenge existing hypotheses regarding the production of individual manuscript units, but
it has not yet reached its full potential, and future work is required, particularly in the analysis of dated and datable
manuscripts, in order to reveal how quantitative facts about scribal preferences changed over time, and how this can be used in
the examination of manuscripts for which no date of creation is known.
Le chien, l’enfant et le serpent
Authors: Foehr-Janssens Yasmina
Published: April 2023

Starting from the tale “Canis” as it appears in the French Roman des Sept Sages in verse (version K) and in the Dolopathos of Jean de Haute-Seille, as well as in its adaptation into Old French by Herbert, I will discuss the complex imaginary relationships between the human and animal actors in a tale which recounts a family drama. Our attention will be focused on the presence of snakes, which maintain a strange familiarity with domestic space. In this respect, different versions of the fable of “The Man and the Snake” will be discusses, as they often include, like the story of “Canis,” the murder of a child by a snake.

I propose to consider a political reading of these narratives of negotiated cohabitation and shared food whose implications go beyond the private sphere to take on ethical significance in a feudal context.
Dogs of lust, loyalty, and ingratitude in the Early Modern manuscript
painting of Robinet Testard
Authors: Friedman John B. , Figg Kristen M.
Published: April 2023

Robinet Testard, the court illuminator from 1484 to 1531 for
Count Charles of Angoulême (d. 1496) and Louise of Savoie (d. 1531), had an
artistic career extending from the era of the handwritten book into the age of
printing and graphic media. His embrace of these new technologies included
pasting in and coloring the twelve single-leaf Large Passion cycle engravings of
Israel van Meckenem into a manuscript book of hours (Paris, BnF, lat. 1173) that
he was illustrating for Charles, a practice that allows us to see how he chose
to enhance certain details and even add new ones that radically altered the
meaning of the scene. In many of his illuminations done for the Valois couple,
Testard had enjoyed adding dogs to scenes both to appeal generally to the
contemporary fashion for dogs in scenes of courtly domestic life and to express
his own moral and religious convictions on the topics of sexual license or
marital fidelity. In the BnF hours of Charles of Angoulême, however, we see
these dogs put to a new use. In Testard’s reworking of the Apostle Peter’s
denial of Jesus in the Interrogation before Annas print and in the Crowning with
Thorns print (with a subtext of the biblical Malchus’ failure to acknowledge
Jesus’ miraculous healing of his severed ear), we can see how Testard
brilliantly reworks existing dogs though color, expression, and body language to
express his disapproval of religious ingratitude.
Du liniere au lièvre chez Geoffroi de la Tour
Landry, Caxton et Marquard vom Stein
Authors: Tassone Claudia
Published: April 2023

Cette étude se pose le but d’examiner le cas spécifique d’un
animal ‘mystérieux’ dans un des livres de conduite les plus célèbres du Moyen
Âge, le Livre du Chevalier de la Tour Landry pour l’enseignement de ses
filles. L’auteur, Geoffroi de la Tour Landry, instruit ses filles à
vivre dans le monde, et il le fait en leur montrant les mauvais comportements à
éviter et en leur proposant différents modèles à suivre. Dans un de ses
chapitres, il mentionne quatre animaux, dont trois servent à illustrer un
comportement à refuser et un, dont le nom varie dans les manuscrits, est en
revanche proposé comme modèle de vertu. Dans la tentative d’identifier ce
dernier animal, nous avons consulté plusieurs manuscrits ainsi que les
traductions médiévales en anglais et en allemand du Livre du Chevalier
de la Tour Landry, ce qui témoigne de l’importance d’une étude
interlinguistique même pour les textes médiévaux.
Du serpent à la chèvre et du renard au cerf
Authors: Wittwer Stephanie
Published: April 2023

Les armoriaux arthuriens indiquent, pour chaque chevalier de la Table Ronde, l’écu qu’il arbore et permettent
ainsi d’identifier le personnage. La plupart du temps, il s’agit d’un animal ou d’un objet, parfois d’un motif géométrique qui est
attribué de manière univoque à un porteur spécifique. Or la tradition manuscrite n’est pas toujours unanime quand il s’agit
d’indiquer l’image qui figure dans l’écu. Dans quelques cas apparaissent en effet des contradictions pouvant concerner le texte ou
le dessin. La présente étude porte sur un certain nombre de ces cas où un mot difficile ou un dessin impossible à interpréter ont
généré un problème qui s’est ensuite propagé dans la tradition manuscrite. Nous étudions en particulier les animaux énigmatiques
qui figurent dans l’écu de Calogrenant, dans celui de Galinde, de Virant de la Roche, de Solinan et du Chevalier des Sept Voies.
L’objectif est de comprendre l’origine de la confusion et d’observer les réactions des copistes et des peintres face au
problème.
Allosteric modulation of GluN1/GluN3 NMDA receptors by GluN1-selective competitive antagonists
Authors: Rouzbeh Nirvan , Rau Andrew R. , Benton Avery J. , Yi Feng , Anderson Carly M. , Johns Mia R. , Jensen Loren , Lotti James S. , Holley David C. , Hansen Kasper B.
Published: April 2023

NMDA-type ionotropic glutamate receptors are critical for normal brain function and are implicated in central nervous system disorders. Structure and function of NMDA receptors composed of GluN1 and GluN3 subunits are less understood compared to those composed of GluN1 and GluN2 subunits. GluN1/3 receptors display unusual activation properties in which binding of glycine to GluN1 elicits strong desensitization, while glycine binding to GluN3 alone is sufficient for activation. Here, we explore mechanisms by which GluN1-selective competitive antagonists, CGP-78608 and L-689,560, potentiate GluN1/3A and GluN1/3B receptors by preventing glycine binding to GluN1. We show that both CGP-78608 and L-689,560 prevent desensitization of GluN1/3 receptors, but CGP-78608-bound receptors display higher glycine potency and efficacy at GluN3 subunits compared to L-689,560-bound receptors. Furthermore, we demonstrate that L-689,560 is a potent antagonist of GluN1FA+TL/3A receptors, which are mutated to abolish glycine binding to GluN1, and that this inhibition is mediated by a non-competitive mechanism involving binding to the mutated GluN1 agonist binding domain (ABD) to negatively modulate glycine potency at GluN3A. Molecular dynamics simulations reveal that CGP-78608 and L-689,560 binding or mutations in the GluN1 glycine binding site promote distinct conformations of the GluN1 ABD, suggesting that the GluN1 ABD conformation influences agonist potency and efficacy at GluN3 subunits. These results uncover the mechanism that enables activation of native GluN1/3A receptors by application of glycine in the presence of CGP-78608, but not L-689,560, and demonstrate strong intra-subunit allosteric interactions in GluN1/3 receptors that may be relevant to neuronal signaling in brain function and disease.
On the viability of f(Q) gravity models
Authors: De Avik , Loo Tee-How
Published: April 2023

In general relativity, the contracted Bianchi identity makes the field equation compatible with the energy conservation, likewise in f(R) theories of gravity. We show that this classical phenomenon is not guaranteed in the symmetric teleparallel theory, and rather generally f(Q) model specific. We further prove that the energy conservation criterion is equivalent to the affine connection’s field equation of f(Q) theory, and except the

f
(
Q
)
=
α
Q
+
β

model, the non-linear f(Q) models do not satisfy the energy conservation or, equivalently the second field equation in every spacetime geometry; unless Q itself is a constant. So the problem is deep-rooted in the theory, several physically motivated examples are provided in the support.
Light speed variation from GRB 221009A
Authors: Zhu Jie , Ma Bo-Qiang
Published: April 2023

It is postulated in Einstein’s relativity that the speed of light in vacuum is a constant for all observers. However, the effect of quantum gravity could bring an energy dependence of light speed, and a series of studies on high-energy photon events from gamma-ray bursts (GRBs) and active galactic nuclei (AGNs) suggest a light speed variation

v
(
E
)
=
c

1
−
E

/

E

LV

with E
LV = 3.6 × 1017 GeV or a bound E
LV ≥ 3.6 × 1017 GeV. From the newly observed gamma-ray burst GRB 221009A, we find that a 99.3 GeV photon detected by Fermi-Large Area Telescope (LAT) is coincident with the sharp spike in the light curves detected by both Fermi-Gamma-ray Burst Monitor (GBM) and HEBS under the above scenario of light speed variation, suggesting an option that this high-energy photon was emitted at the same time as a sharp spike of low-energy photon emission at the GRB source. Thus this highest energy photon event detected by Fermi-LAT during the prompt emission of GRBs might be considered as an optional signal for the linear form modification of light speed in cosmological space.
Remote wide angle view broad wavelength viewing system compatible with D-T operations in JET
Authors: Balboa I , Rose E , Matthews G F , Croft D , Stamp M , Silburn S A , Williams J C , Hepple D , Huber A , Whetham S , Iglesias D , Kinna D J , Beldishevski M , Figueiredo J , Perez Von Thun C , Jones G , Balshaw N , Horton L D , Lobel R C , Pearson I J , Pepperell K W , Fishpool G , Lane B , Zastrow K-D , Arnoux G , Bodnar G , Carman P , Carvalho P , Conway N J , Gupta N , Huber V , Kocsis G , Manzanares A , Puglia P , Ruiz de Galarreta C , Marren C , Otín R , Naish J , Thompson V K
Published: April 2023

Imaging diagnostics in Joint European Torus have become essential in the study of plasma wall interactions and the protection of the plasma facing components. During deuterium operations, the location of these diagnostics was at close proximity to the vessel. However, for the 50–50 deuterium-tritium operation, the neutron yield impact onto the electronics of these imaging diagnostics would have caused them to fail completely at these locations. Shielding these systems from neutrons is achieved by relocating a selected number of these imaging systems to outside the Torus Hall (i.e. to the other side of the biological shield wall). The relocation encompasses the construction of two new lines of sight crossing through the biological shield wall and each of them using an optical relay which extends to separate ports in the machine. This article starts with a brief description of two new viewing systems. However, it focuses on the optical modelling and engineering design of one of them which is a multiple camera system producing a wide angle view (WAV) of the inside of the vessel. This WAV system has been used successfully during the recent D-T campaign. It operates in a broadband wavelength range extending from the visible to the middle infrared. It also incorporates a novel in-house horizontal kinematic mirror mount made from glass reinforced plastic as part of the optical relay. The operational stability of the WAV system has also been assessed and some post design improvements implemented.
JET exhaust detritiation system replacement—design, commissioning, and operation
Authors: George Robert , Kennedy David , Huddleston Tim , Vittal Aarthee , Morris Ryan , Ng Simon , Lefebvre Xavier
Published: April 2023

The exhaust detritiation system (EDS) of the Joint European Torus (JET) active gas handling system removes tritium from exhaust gases and contaminated air prior to discharge to stack. The system was replaced prior to JET’s tritium experimental campaign due to corrosion damage. In this paper, the following topics are presented: system function and description, corrosion and failure of the previous EDS, enhancements for the replacement EDS including testing of acid passivation column, commissioning experience, operating experience and performance. Acids including hydrofluoric were generated in catalytic recombiners following inadvertent halogen ingress. Pitting corrosion was identified with breakthrough failure of condensate pipework. To mitigate a recurrence, a novel acid passivation sub-system was designed. The acid passivation testing demonstrated successful performance of the design and calcium-hydroxide passivation packing tested, with acids below the limit of detectability at the test column outlet. Issues encountered during commissioning are described and key performance metrics such as detritiation factor reported. Finally, operational issues and system performance is presented.
The role of the number of filaments in the dissociation of CO2 in dielectric barrier discharges
Authors: Douat C , Ponduri S , Boumans T , Guaitella O , Welzel S , Carbone E , Engeln R
Published: April 2023

An experimental investigation of the dissociation of CO2 in a symmetric pin-to-pin dielectric barrier discharge (DBD) is presented. The reactor geometry allows for an accurate control of the number of filaments (microdischarges) and is used to study the impact of one single filament on the CO2 dissociation. We show the number of filaments per half cycle follows a power-law as a function of the injected power and does not depend on pressure, flow or other process parameters. It is shown that for pressures between 200 and 700 mbar approximately 0.5 W per filament is required and the charge transferred per filament remains constant at 0.5 nC. Furthermore, the dependence of CO2 conversion on only specific energy input (SEI) is shown to be valid down to a single filament. Additionally, by using quantum cascade laser absorption spectroscopy the absolute number of CO molecules produced per filament is measured and is found to be in the range from 5.1011 to 2.1012. The conversion degree of CO2 into CO is estimated to be lower than 0.1% within a single filament and increases with SEI. In the presence of a couple of filaments, the maximum energy efficiency obtained is 25%. A comparison of the conversion degrees in pin-to-pin DBD and plane-to-plane DBD configuration shows that these two reactor geometries follow the same power law. This means the geometry is not the most important parameter in CO2 dissociation in DBDs, but the SEI and thus the number of filaments ignited per unit of time. This result means that the dependence of conversion degree on the SEI can be extended to a single filament. This observation leads to the conclusion that the SEI appears to be valid as a universal scaling parameter down to very low values.
Modeling of very high frequency large-electrode capacitively coupled plasmas with a fully electromagnetic particle-in-cell code
Authors: Eremin D , Kemaneci E , Matsukuma M , Mussenbrock T , Brinkmann R P
Published: April 2023

Phenomena taking place in capacitively coupled plasmas with large electrodes and driven at very high frequencies are studied numerically utilizing a novel energy- and charge-conserving implicit fully electromagnetic particle-in-cell (PIC)/Monte Carlo code ECCOPIC2M. The code is verified with three model problems and is validated with results obtained in an earlier experimental work (Sawada et al 2014 Japan. J. Appl. Phys.
53 03DB01). The code shows a good agreement with the experimental data in four cases with various collisionality and absorbed power. It is demonstrated that under the considered parameters, the discharge produces radially uniform ion energy distribution functions for the ions hitting both electrodes. In contrast, ion fluxes exhibit a strong radial nonuniformity, which, however, can be different at the powered and grounded electrodes at increased pressure. It is found that this nonuniformity stems from the nonuniformity of the ionization source, which is in turn shaped by mechanisms leading to the generation of energetic electrons. The mechanisms are caused by the interaction of electrons with the surface waves of two axial electric field symmetry types with respect to the reactor midplane. The asymmetric modes dominate electron heating in the radial direction and produce energetic electrons via the relatively inefficient Ohmic heating mechanism. In the axial direction, the electron energization occurs mainly through an efficient collisionless mechanism caused by the interaction of electrons in the vicinity of an expanding sheath with the sheath motion, which is affected by the excitation of the surface modes of both types. The generation of energetic electron populations as a result of such mechanisms is shown directly. Although some aspects of the underlying physics were demonstrated in the previous literature with other models, the PIC method is advantageous for the predictive modeling due to a complex interplay between the surface mode excitations and the nonlocal physics of the corresponding type of plasma discharges operated at low pressures, which is hard to reproduce in other models realistically.
Quantum size effects in stacked multilayer graphene
Authors: Chen Zheng , Cheng Zhenyu , Du Liang , Yang Yong
Published: April 2023

In this paper,we study the quantum size effects in multilayer graphene sheets using first principles methods within the framework of density functional theory. Four different types of functionals are adopted respectively to describe the van der Waals interactions between graphene layer sheets: the DFT-GGA(PBE), the DFT-D2, the vdW-DF and the optPBE-vdW. By inspecting the binding energy as a function of increasing graphene layers, we find that the PBE functional can not well describe the van der Waals interactions between different layers of graphene sheets. In contrast, the other three methods exhibit similar results with monotonic increasing binding energy as a function of graphene layers towards the bulk limit, concluding that the layered graphene structure is stabilized by van der Waals interactions. The density of states at zero temperature indicate that the multilayer graphene sheets is a semi-metal, which is independent of sheet layers number. The finite temperature (about 200 K) density of states at Fermi surface are studied as a function of the number of stacking graphene layers. The systematic oscillating behavior of finite temperature density of states between odd and even number of layers is a demonstration of quantum size effects. The Fermi wavelength will converge to two times the inter-layer distance of graphite, which is consistent with the theory describing the motion of particles in a quantum well. Finally, we study the adsorption of single H atom on multilayer graphene sheets to test the role of quantum size effects. The adsorption energies and the vibration frequencies are calculated for comparison with experiments. Our results shed light on understanding the stacking process of multilayer graphene in vacuum both theoretically and experimentally.
Quantum propagator for a general time-dependent quadratic Hamiltonian: Application to interacting oscillators in external fields
Authors: Janjan Shohreh , Kheirandish Fardin
Published: April 2023

In this paper, we find the quantum propagator for a general time-dependent quadratic Hamiltonian. The method is based on the properties of the propagator and the fact that the quantum propagator fulfills two independent partial differential equations originating from Heisenberg equations for positions and momenta. As an application of the method, we find the quantum propagator for a linear chain of interacting oscillators for both periodic and Dirichlet boundary conditions. The state and excitation propagation along the harmonic chain in the absence and presence of an external classical source is studied and discussed. The location of the first maxima of the probability amplitude P(n, τ) is a straight line in the (n, τ)-plane, indicating a constant speed of excitation propagation along the chain.
Identification of node rankings in temporal networks based on multilayer topological overlap coefficients
Authors: Niu Qiong , Hu Gang , Xu Li-Peng , Ren Yong-Jun
Published: April 2023

Identifying node ranking in complex networks over time is a crucial research topic. The topology relationship of general network nodes reflects their importance in the network. The node ranking evolution within the temporal layers depends not only on the current layer’s topology relationship but also on the nodes’ interaction relationships as they evolve. In this study, we propose a method called the multilayer topological overlap coefficient-based supra-adjacency matrix to identify node rankings. To account for the node evolution process, we analyze and establish the node ranking matrix structure of unweighted and weighted temporal networks in the temporal network. We also analyze the sequence multilayer node topological overlap structure throughout the whole-time layer. The experimental results demonstrate that the topological overlap coefficient unweighted supra-adjacency matrix of multilayer nodes performs up to 15.00% and 25.80% better than the two supra-adjacency matrix metrics under three different metrics. Moreover, the topological overlap coefficient weighted supra-adjacency matrix of multilayer nodes outperforms the SAM metrics by up to 70.20%.
Study on Selection of Test Water for the Large Liquefied Natural Gas (LNG) Storage Tanks
Authors: Fan Yang , Li Xiao , Yuqi Zhang , Huan Huang
Published: April 2023

As one of the most important clean energy, liquefied natural gas (LNG) is highly demanded and imported on a large scale in China. The safe and efficient storage of LNG is critical to its transport and development. The structure of the LNG storage tanks requires specific inspection with high standards following related specifications during its construction. After constructing the main structure of the inner and outer tank of the large LNG storage tank, the hydraulic test of the inner tank shall be carried out, but there is no systematic specification and guidance for the selection of water quality. Here, the freshwater and seawater are compared as a medium. Freshwater is preferred for the least corrosion to the inner tank if it is accessible. With seawater as a test medium, impressed current cathodic protection or cathodic protection with sacrificial anode should be taken as corrosion countermeasures. This paper will contribute to the hydraulic test as a reference for the construction of large LNG storage tanks in the future.
An optimal configuration method for microgrid second-use battery storage system considering users allocate the cost of peak-shaving auxiliary service
Authors: Li Xinru , Shen Jin
Published: April 2023

The second use of retired batteries can reduce energy storage system (ESS) costs, relieve the power supply pressure of the power grid during peak hours, peak cutting and valley filling and promote energy saving and emission reduction. Power users can allocate a certain amount of peak-shaving auxiliary service costs to guide users to cut peaks and fill valleys. This paper presented an optimal configuration method for a microgrid second-use battery energy storage system (BESS) considering the users allocate peak shaving auxiliary service costs. A second-use BESS optimization configuration model was established to configure the second-use BESS with the lowest cost and the lowest peak shaving service cost allocated by users. The optimization model was solved by the particle swarm algorithm (PSO). And compared with the configured conventional BESS of residential area micro-grid. Simulation is carried out on the MATLAB platform, and the results verify the model’s and algorithm’s rationality.
Research on integrated micro-energy storage technology based on multi-type electrochemistry
Authors: Zhang Shuo , Yu Changle , Zhang Su
Published: April 2023

Electrochemical energy storage is a process that utilizes chemical reactions to store and release electrical energy in the form of chemical energy. These include lead-acid, lithium-ion, flow, sodium-sulfur batteries, etc., while electrochemical energy storage materials and technologies are the keys to solving the utilization, conversion, and storage of clean energy. In order to solve the problem that the current energy storage technology has an extensive range of energy storage frequency fluctuations in the application process, this paper conducts research on a comprehensive micro-energy storage technology based on multi-type electrochemistry, which improves the stability of energy storage. Based on the introduction of multi-type electrochemical technology, MXene (Ti3C2) was selected as the dispersion liquid, and PVA was used as the gel electrolyte to complete both preparations. The device’s fabrication and assembly are completed based on calculating the rated power, rated capacity, and other parameters of the micro energy storage capacitor. Aiming at the ultra-low frequency oscillation problem that may exist in the energy storage process, this paper develops a micro energy storage control method that participates in primary frequency modulation. The comparison experiment proves that the frequency fluctuation of the new energy storage technology is within the controllable range in practical application, which can effectively improve the stability of energy storage.
Design of Wave Energy Capture Structure and Mooring System with Additional Mass
Authors: Liu Shi , Yang Yi , Guo Xinran , Liang Chonggan , Wang Hongxing , Liu Zhigang
Published: April 2023

There is huge amounts of wave energy in ocean, and how to convert its unstable energy into stable and sustainable output energy is a major problem that needs to be solved urgently. The power production performance of a wave energy capture device is closely related to its anti-wave performance, so the design of the mooring system is very important for it, In this paper, a truss-type three-sided wave energy capture device is used, and the mooring system with additional mass is used for research. The study found that the mooring system with additional mass blocks could significantly restrain the platform’s surge displacement under wind and wave loads.
Research on Capacity Allocation Method for Multi-scenario Rural Integrated Energy System
Authors: Feng Changzheng , Wang Weishuai , Wang Zhelong , Li Cancan , Yang Weijin , Wei Shanshan
Published: April 2023

As an significant part of China’s energy system, rural energy has ushered in significant development opportunities in the national strategy of Rural Revitalization and new urbanization construction. On account of the differences in the geographical location of China, different rural areas have different economic statuses and characteristics, so it is essential to allocate the corresponding comprehensive energy system for different regional advantages, which is that the energy supply system can satisfy the load demand in rural areas. To solve the above problems, the investigation on the development scenario of village energy differentiation, considering economic, environmental protection and energy saving, puts forward the optimization allocation method of comprehensive rural energy under the differential scenario. The capacity allocation method of the rural comprehensive energy system put forward in this text is verified by selecting three villages with typical scenarios in China.
Short-term Load Prediction of Electric Vehicle Charging Stations built on GA-BPNN Model
Authors: Li Quanming , Xiong Hongjun
Published: April 2023

In response to the rapid growth of electric vehicles (EVs), the expanding charging demand significantly impacts the distribution network, and load prediction for EV charging stations is required. We combine the genetic algorithm and BPNN to achieve a more accurate and efficient prediction effect for electric vehicle charging stations. It adopts GA to optimize the weights and thresholds of BPNN to obtain the optimal solution of the BP neural net prediction model, thus establishing a BPNN prediction model built on GA. We apply this model to the load prediction of actual EV charging stations. The MATLAB simulation study shows that the prediction model optimized by GA acquires higher accuracy and better practicability than the unoptimized prediction model.
Sparsity Promoting Dynamic Mode Decomposition for Data-Driven Modeling of Wind Turbine Wake
Authors: Zhang Hu , Xu Chang , Wei Shangshang , Deng Zhiwen , Jiao Zhixiong
Published: April 2023

High-fidelity numerical simulation is suitable for analyzing the complex unsteady flow field dynamics of wind turbines. For a better understanding of these flow characteristics, the dynamic mode decomposition method can be used to carry out a reduced-order model study on the wakefield of wind turbines based on large-eddy simulations (LES) numerical simulation. In this paper, we abstract material dynamic information from the wakefield of the wind turbine by applying the sparsity-promoting dynamic mode decomposition (SPDMD) method, and the decomposition results are contrasted with the standard dynamic mode decomposition (DMD) method. Indicated that both mode decomposition methods can abstract the dynamic characteristics of wake and reveal the development and variation law of wind turbine wake. However, the frequency and spatial structure of the selected modes are different. For the purpose of demonstrating the extraction impact of the DMD/SPDMD method on the wakefield of wind turbines, DMD/SPDMD reduced-order models are established respectively. The result indicated that the relatively limited number of SPDMD modes is adequate to validly rehabilitate the wakefield of the unabridged wind turbine while standard DMD methods prerequisite more decomposition modes. Therefore, compared with the standard DMD method, the SPDMD method has strong robustness in mode selection, eliminates the feature information that contributes weakly to the flow, and has a smaller performance loss in the reconstruction of the wakefield of the wind turbine. The consumption of computing resources is greatly reduced.
The carbon trading operation optimization for virtual power plants of industrial parks considering wind power
Authors: Tong Yongjie , Meng Zhen , Qiu Peng , Cui Jia , Ma Jinshi , Tian Yanfeng , Wang Zhe
Published: April 2023

Virtual power plants can participate in power market transactions by combining wind and solar power generation and energy storage technologies, They participate in energy market transactions for aggregating distributed energy and user-side resources, Meanwhile, the carbon trading market is an effective tool to control the greenhouse effect, As a market subject with unlimited potential, VPP of industrial park plays its environmental benefits by participating in the carbon trading market, It is able to promote the growth of VPP benefits and reduce carbon emissions, Firstly, this paper introduces the composition of virtual power plants and the carbon trading market, Secondly, this paper puts forward the influence of the uncertainty of wind turbines on virtual power plants, Thirdly, a virtual power plant model is build under the uncertainty of wind turbines, Finally, the operation of virtual power plants is optimized considering carbon trading, so as to maximize the benefits and explore the carbon reduction capacity of virtual power plants
Material Selection Analysis of UHV AC Double Circuit Steel Pipe Tower Cross Arm Structure
Authors: Wang Zhifei
Published: April 2023

The cross arm of wire is an important part of the UHV tower, and the force and calculated length of the upper and lower main or inclined materials are smaller than the main or inclined materials of the tower, and the two types of section types, Angle steel, and steel pipe, have their own advantages and disadvantages. How to select materials reasonably and give full play to their advantages is an important content of the optimization design of the tower structure. In this paper, the double circuit steel pipe tower of the same UHV project tower is taken as an example, and the main material of the cross arm and the inclined material are selected Angle steel or steel pipe. The research shows that the main material of the cross arm is Angle steel, the main material of the cross arm is suggested to be steel pipe, the front inclined material of the cross arm is steel pipe, and the material selection principle of the cross arm can provide a reference for the future engineering design.
Axial Force Detection Based on Electromagnetic Ultrasonic of Power Bolt
Authors: Wu Zhaobin , Guo Tao , An Zhichong , He Yongfeng
Published: April 2023

Bolts are widely used in industrial production, and the electromagnetic ultrasonic shaft force detection method is designed based on power bolts. Combined with the actual characteristics, the curve is divided into linear and non-linear characteristic curves, and the power bolt’s strength coefficient in the free and tightened states is calculated. The two are determined to establish the calibration model of the power bolt. Design ultrasonic shaft force detection method, combined with different propagation media to compare the emission angle and refraction angle conversion relationship to obtain the ultrasonic shaft force detection relationship formula. Under the four test samples, the characteristic bolt curve was calibrated, and the ultrasonic wave flight time under different bolt clamping lengths was tested. The experimental results showed that all four types of samples could get effective detection results, and the shaft force detection effect of sample 1# was the best.
Research on the High Voltage Near Electric Safety Distance Alarm Device
Authors: Yu Ting , Duan Xiaoli , Yue Yishi , Liu Sanwei , Zeng Zeyu , Duan Jianjia
Published: April 2023

In the process of construction near overhead transmission lines, the safety distance between the crane, tower crane, and live wire is insufficient, which leads to the tripping of lines. It not only causes huge economic losses, but also endangers human life safety. In order to avoid the car accidentally touching live wire, this paper studies a high voltage near electric safety distance alarm device, and introduces the structure and working principle of the device. The voltage signal is measured by the test to reflect the distance between the vehicle and the live wire. The measured voltage signal data is processed and compared with the alarm voltage signal threshold. According to different voltage levels and distances, the high voltage near electric safety distance alarm device can realize voice alarm and remind operators to pay attention to keep a safe distance.
Research on Transmission Line Motion Condition Monitoring Device and Communication Networking
Authors: Dong Yanwu , He Pengjie , Yan Yu , Li Jie , Lu Ziqiang
Published: April 2023

In order to ensure the reliability of transmission line operation, it is necessary to carry out effective monitoring of its motion state, and master the running state of transmission line in real time by means of data analysis and comparison. During this period, transmission line motion state monitoring device is bound to be used. However, in order to ensure the effectiveness of transmission line monitoring, it is necessary to add communication network into the motion state monitoring device, so as to improve the reliability of transmission line data acquisition, transmission and analysis, and ensure the normal and safe operation of transmission circuit.
Power System Flexibility Enhancement with Energy Storages Considering Charging Characteristics
Authors: Xiang Jie , Huang Bowen , Xiao Guojun , Zeng Zihao , Xie Xueyuan , Chen Hong , Tan Zhe
Published: April 2023

With the increasing integration of renewable energy generations, the renewables’ uncertainties impact the power system operation. So, it is critical to enhancing the system’s operational flexibility. To this end, one of the most useful solutions is to deploy energy storage. This paper proposes a power system flexibility enhancement method using energy storage systems (ESSs). The grid’s flexibility requirement is analyzed, and the flexibility enhancement model is constructed, considering the ESSs’ charging and discharging characteristics. Case studies on an IEEE 33-node system verify the quantitative method. The conclusions indicate the ESSs could efficiently meet the system’s flexibility requirements.
Emission factors measurement of regional power grid based on Gaussian process regression
Authors: Yang Zhibo , Zhang Qunxiong , Li Jianming , Sun Haipeng , Sun Fei
Published: April 2023

Machine learning can analyze and study the huge amount of big data on electricity, explore and mine the correlation between electricity data, and then analyze the current situation and predict the future values of certain electric power industry indicators. In this paper, various social, economic and industrial indicators affecting the grid emission factors are derived through algorithmic analysis of the grid emission factors. The Gaussian process regression analysis algorithm was used to compare and analyze the collected electricity data, focusing on five aspects of regression effects, including root mean square error, mean square error, mean absolute error, fitting coefficient, and running time, to obtain the optimal regression model parameters. Finally, the trained model was completed to predict the emission factors of the East China Power Grid from 2020 to 2060.
Optimal allocation of energy storage in distribution network considering microgrid cluster and system economic operation
Authors: Li Zhenfeng
Published: April 2023

A two-stage optimization model for the location of distribution grid energy storage (ES) configuration and its capacity determination is proposed for different operating conditions of the distribution grid, consider the impact of microgrid cluster operation strategies and sub-microgrid cooperation on the distribution network (DN). In the first stage, location, number of ES devices, the charging/discharging strategy were solved for using GAMS software, the minimum operating cost of the distribution system is used as the target for the daily operating timescale. In the second stage, the minimum annual operating cost is taken as the target for a one-year time scale, consisting of investment, ES equipment’s operation and maintenance in the DN, and is solved using a particle swarm optimisation algorithm with nested ES lifetime calculations in MATLAB software. The calculations show that the optimal allocation method of ES equipment in DN can effectively reduce the operating costs of DN as well as the investment and maintenance costs of ES under different operating conditions, taking into account the economic operation of microgrid clusters and distribution systems. As a result, the economy of the DN can be substantially improved.
Numerical studies on storage process of phase change material with metal foam for prefabricated cabin energy system
Authors: Yang Jialin , Dou Zhenlan , Zhao Pengxiang , Zhou Xichao , Cong Lin , Li Na , Zhang Chunyan
Published: April 2023

Latent heat thermal energy storage (LHTES) is a promising technology in prefabricated cabin energy system. This paper proposed a new thermal energy storage (TES) system with phase-change material (PCM) embedded in metal foam and heating source is steam or hot water. The mathematical formulas and numerical models of representative units are studied. The effect of natural convection is considered in the simulation of melting process. Finite volume method is used to discretize the governing equation The Forchheimer-Darcy law is used to model the porous resistance and a local thermal equilibrium model is developed. The model is firstly validated against low temperature experiments from the literature and then used to simulate the charging behaviour of LHTES system proposed by this paper. Foamed metal and fin are effective means to improve the heat transfer performance and shorten the melting time of heat storage system. In this paper, the effects of pore density, porosity, wall temperature and fin spacing on temperature change and melting rate are discussed.
Research on the calculation method of manual haul distance for transmission line engineering considering equivalent slope
Authors: Wu Huiying , Xiao Fangshun , Zou Meihua , Lin Jiawei , Ou Wenqi
Published: April 2023

Due to the long path and the point-like distribution of tower positions in the transmission line project, most of the material transportation in the construction needs to be transported by manpower, and the manpower transport involves the reasonable design and calculation of the manpower distance, while the manpower distance involves the follow-up Construction safety, construction cost and construction efficiency. Therefore, when carrying out construction design and budget estimation, it is often necessary to count the average manpower distance of material transportation, especially for hills, mountains and other terrains. However, most of the existing manpower distances are set based on subjective experience, which leads to manual labor distances. The error is large, resulting in chaotic construction management, large differences in construction costs, inability to guarantee construction safety, and low construction efficiency. Based on this, in this paper, the mountain is equivalent to a cone, and the mathematical model of the equidistant cone helix is used for modeling, and the arc length calculation formula is used to calculate the distance of manual climbing, which is used as the artificial distance of the tower. The research results of this paper realize the objective calculation of manual transportation distance, greatly reduce the data error, reduce the construction cost difference, and improve the construction safety and efficiency.
Simulation of a plasmonic sensor using kinetic theory of plasma with the Vlasov equation in MATLAB
Authors: Khulbe Manisha
Published: April 2023

This research proposes a mathematical model for a plasmonic sensor using kinetic theory of plasma with the Vlasov equation. A nanoantenna cavity of a plasmonic material is driven by an input electromagnetic wave, which changes the charge density and current flow in the cavity, resulting in a change in the Fermi distribution function of the charged particles. The results are achieved in terms of current density and conductivity by solving the Boltzmann transport equation, Maxwell’s equations, and Taylor series expansion in terms of perturbed electric fields with linear integro differential equations. The results are simulated using MATLAB. The changes in current density and conductivity are validated by experimental analysis of graphene plasmonic material using patch antenna with the dielectric substrates SiO2 and Al2O3. By varying the applied electric fields, current changes at the output of the plasmonic antenna are analyzed using signal-processing techniques. Wavelet transforms are used to find the space-scale behavior of the output signals, such as current density variation, voltage variation, and susceptibility change with sub-band coding techniques in terms of wavelet coefficients.
𝐿^{∞}-Energy method and its applications to nonlinear partial differential equations
Authors: Ôtani Mitsuharu
Published: April 2023

A method called “

L
∞

L^\infty

-Energy Method” is introduced. Several basic tools for this method are prepared and some typical ways of usage of this method are exemplified for some nonlinear parabolic equations and nonlinear elliptic equations with nonlinear boundary conditions.
Socioeconomic differences in older adults’ unplanned hospital admissions: the role of health status and social network
Authors: Harber-Aschan Lisa , Darin-Mattsson Alexander , Fratiglioni Laura , Calderón-Larrañaga Amaia , Dekhtyar Serhiy
Published: April 2023

Background

the socioeconomic distribution of unplanned hospital admissions in older adults is poorly understood. We compared associations of two life-course measures of socioeconomic status (SES) with unplanned hospital admissions while comprehensively accounting for health, and examined the role of social network in this association.

Methods

in 2,862 community-dwelling adults aged 60+ in Sweden, we derived (i) an aggregate life-course SES measure grouping individuals into Low, Middle or High SES based on a summative score, and (ii) a latent class measure that additionally identified a Mixed SES group, characterised by financial difficulties in childhood and old age. The health assessment combined measures of morbidity and functioning. The social network measure included social connections and support components. Negative binomial models estimated the change in hospital admissions over 4 years in relation to SES. Stratification and statistical interaction assessed effect modification by social network.

Results

adjusting for health and social network, unplanned hospitalisation rates were higher for the latent Low SES and Mixed SES group (incidence rate ratio [IRR] = 1.38, 95% confidence interval [CI]: 1.12–1.69, P = 0.002; IRR = 2.06, 95% CI: 1.44–2.94, P < 0.001; respectively; ref: High SES). Mixed SES was at a substantially greater risk of unplanned hospital admissions among those with poor (and not rich) social network (IRR: 2.43, 95% CI: 1.44–4.07; ref: High SES), but the statistical interaction test was non-significant (P = 0.493).

Conclusion

socioeconomic distributions of older adults’ unplanned hospitalisations were largely driven by health, although considering SES dynamics across life can reveal at-risk sub-populations. Financially disadvantaged older adults might benefit from interventions aimed at improving their social network.