bluuebunny/crossref_metadata_2025_split huggingface dataset:
Du serpent à la chèvre et du renard au cerf
Authors: Wittwer Stephanie 
Published: April 2023

Résumé
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.
On the viability of f(Q) gravity models
Authors: De Avik , Loo Tee-How 
Published: April 2023

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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.