bluuebunny/crossref_metadata_2025_split huggingface dataset:
Traveling spiral wave chimeras in coupled oscillator systems: emergence, dynamics, and transitions
Authors: Bataille-Gonzalez M , Clerc M G , Knobloch E , Omel’chenko O E 
Published: September 2023

Abstract
Systems of coupled nonlinear oscillators often exhibit states of partial synchrony in which some of the oscillators oscillate coherently while the rest remain incoherent. If such a state emerges spontaneously, in other words, if it cannot be associated with any heterogeneity in the system, it is generally referred to as a chimera state. In planar oscillator arrays, these chimera states can take the form of rotating spiral waves surrounding an incoherent core, resembling those observed in oscillatory or excitable media, and may display complex dynamical behavior. To understand this behavior we study stationary and moving chimera states in planar phase oscillator arrays using a combination of direct numerical simulations and numerical continuation of solutions of the corresponding continuum limit, focusing on the existence and properties of traveling spiral wave chimeras as a function of the system parameters. The oscillators are coupled nonlocally and their frequencies are drawn from a Lorentzian distribution. Two cases are discussed in detail, that of a top-hat coupling function and a two-parameter truncated Fourier approximation to this function in Cartesian coordinates. The latter allows semi-analytical progress, including determination of stability properties, leading to a classification of possible behaviors of both static and moving chimera states. The transition from stationary to moving chimeras is shown to be accompanied by the appearance of complex filamentary structures within the incoherent spiral wave core representing secondary coherence regions associated with temporal resonances. As the parameters are varied the number of such filaments may grow, a process reflected in a series of folds in the corresponding bifurcation diagram showing the drift speed s as a function of the phase-lag parameter α.
Optimizing state-discrimination receivers for continuous-variable quantum key distribution over a wiretap channel
Authors: Notarnicola M N , Jarzyna M , Olivares S , Banaszek K 
Published: September 2023

AbstractWe address a continuous-variable quantum key distribution protocol employing quaternary phase-shift-keying of coherent states and a non-Gaussian measurement inspired by quantum receivers minimizing the error probability in a quantum-state-discrimination scenario. We consider a pure-loss quantum wiretap channel, in which a possible eavesdropper is limited to collect the sole channel losses. We perform a characterization of state-discrimination receivers and design an optimized receiver maximizing the asymptotic secure key rate (SKR), namely the key-rate optimized receiver (KOR), comparing its performance with respect to the pretty good measurement and the heterodyne-based protocol. We show that the KOR increases the SKR for metropolitan-network distances. Finally, we also investigate the implementations of feasible schemes, such as the displacement feed-forward receiver, obtaining an increase in the SKR in particular regimes.
Scaling of errors in digitized counterdiabatic driving
Authors: Hatomura Takuya 
Published: September 2023

Abstract
We study errors caused by digitization of shortcuts to adiabaticity by counterdiabatic driving. We find possibility of error scaling

O

(

M

−
2

)

with the number of time slices M, whereas worse error scaling

O

(

M

−
1

)

is predicted in the conventional theory of the first-order Suzuki-Trotter decomposition. We point out this possibility by considering a state-dependent error bound and confirm emergence of this error scaling

O

(

M

−
2

)

by numerical simulation. Moreover, we numerically show that intermediate error scaling can be observed in digitization of approximate counterdiabatic driving. These results reveal usefulness of digitized counterdiabatic driving from the viewpoints of both cost and performance.
Synchronization of discrete time fractional order neuromuscular models in the presence and absence of stimulus
Authors: Vignesh D , Fataf NAA , Abdul Rahim M F 
Published: September 2023

AbstractThis article proposes a fractional order discrete-time neuromuscular model incorporating calcium kinetics to study the essential role of the neuromuscular system in facilitating rapid information transmission between nerve cells and muscles for bodily functions. The study conducts a dynamical analysis to investigate the stability and periodic oscillations of the system in the presence and absence of tetanus stimuli from neurons. Bifurcation diagrams are generated for different fractional orders and rate constants, highlighting the occurrence of chaotic dynamics. The region of chaos is determined using the largest Lyapunov exponents and the Jacobian matrix method. The study also achieves synchronization of the systems by employing nonlinear control functions with feedback gains. Emphasizing the significance of constructing the biological model using fractional order operators, the article provides a chemical interpretation of the analytical findings. Moreover, the article employs dynamic plots to visually depict the changing system variables over time, allowing for an examination of the concurrent presence of multiple attractors through bifurcation diagrams and phase plane portraits. By studying how chemical kinetics and muscle activation are interrelated, the article uncovers captivating revelations that could guide the formulation of strategies to combat muscle disorders. The article also underscores the potential utility of synchronization in managing neuromuscular conditions, thus emphasizing its practical implications in disease control.
Enhancing pinning ability by the addition of potassium niobate nanorods in YBCO superconductor
Authors: Kumar Gaurav , Dahiya Mamta , Khare Neeraj 
Published: September 2023

Abstract
In the current study, we have investigated the effect of adding potassium niobate (KNbO3) nanorods (NRs) in YBCO superconductor to improve flux pinning properties. The KNbO3-NRs are synthesized by hydrothermal method, and KNbO3-YBCO nanocomposites are prepared by incorporating variable amounts of the NRs in YBCO matrix by solid-state reaction method. X-ray diffraction (XRD) pattern confirmed the orthorhombic phase of YBCO, KNbO3-NRs, and KNbO3-YBCO nanocomposite samples. The morphology and composition of the YBCO, KNbO3, and KNbO3-YBCO nanocomposites are studied using field emission scanning electron microscopy (FESEM) and energy-dispersive x-ray spectroscopy (EDX). Magnetic measurements of KNbO3-YBCO nanocomposites are carried out at temperatures from 15 to 65 K under an external magnetic field from -7 to + 7 T. The value of critical temperature (TC0) in xKNbO3-YBCO nanocomposites showed no significant decrease from the TC0 value obtained for YBCO, indicating that inserting a modest amount of KNbO3-NRs into the YBCO matrix does not result in substantial changes in TC0. The critical current density (JC) showed an enhancement of ∼ 3.6 times in 0.5wt%KNbO3-YBCO nanocomposite compared to YBCO. Additionally, when the concentration of KNbO3-NRs in YBCO was raised, the critical current density (JC) decreased due to the accumulation of KNbO3-NRs at the interfaces between grain boundaries. The rate of JC decay decreases as the externally applied field increases for nanocomposite samples compared to YBCO, showing an improvement in the pinning properties of nanocomposites.
Optimal design of relativistic stellar models
Authors: Haggag Salah 
Published: September 2023

Abstract
A new approach to construct relativistic stellar models is presented. The problem is formulated as an optimal control problem, with an objective function to be optimized. As illustration, the problem is formulated and solved, with the rest mass as the objective function to be minimized, in three cases. First, if the density is piece-wise continuous the optimal solution is the spherical shell. Second, if the density gradient is piece-wise continuous the optimal solution has constant density. Third, if the speed of sound does not exceed that of light, the optimal solution has a linear equation of state. Thus, using this new approach, the equation of state is determined by a physical motivation. Results support the suggestion that the linear equation of state could represent a relativistic incompressible fluid. Extensions to some other configurations are explored.
Seeking and sharing information in collective olfactory search
Authors: Panizon Emanuele , Celani Antonio 
Published: September 2023

Abstract
Searching for a target is a task of fundamental importance for many living organisms. Long-distance search guided by olfactory cues is a prototypical example of such a process. The searcher receives signals that are sparse and very noisy, making the task extremely difficult. Information-seeking strategies have thus been proven to be effective for individual olfactory search and their extension to collective search has been the subject of some exploratory studies. Here, we study in detail how sharing information among members of a group affects the search behavior when agents adopt information-seeking strategies as Infotaxis and its recently introduced variant, Space-Aware Infotaxis. Our results show that even in absence of explicit coordination, sharing information leads to an effective partitioning of the search space among agents that results in a significant decrease of mean search times.
Integrable nonlocal PT-symmetric generalized
so(3,R)
-mKdV equations
Authors: Chen Shou-Ting , Ma Wen-Xiu 
Published: September 2023

Abstract
Based on a soliton hierarchy associated with

so
(
3
,
R
)

, we construct two integrable nonlocal PT-symmetric generalized mKdV equations. The key step is to formulate two nonlocal reverse-spacetime similarity transformations for the involved spectral matrix, and therefore, integrable nonlocal complex and real reverse-spacetime generalized

so
(
3
,
R
)

-mKdV equations of fifth-order are presented. The resulting reduced nonlocal integrable equations inherit infinitely many commuting symmetries and conservation laws.
Study of the gluonic quartic gauge couplings at muon colliders
Authors: Yang Ji-Chong , Guo Yu-Chen , Dong Yi-Fei 
Published: September 2023

AbstractThe potential of muon colliders opens up new possibilities for the exploration of new physics beyond the Standard Model. It is worthwhile to investigate whether muon colliders are suitable for studying gluonic quartic gauge couplings (gQGCs), which can be contributed by dimension-8 operators in the framework of the Standard Model effective field theory, and are intensively studied recently. In this paper, we study the sensitivity of the processμ+μ−→jjνν¯to gQGCs. Our results indicate that the muon colliders with c.m. energies larger than 4 TeV can be more sensitive to gQGCs than the Large Hadron Collider.
Impact of fast ions on microturbulence and zonal flow dynamics in HL-2A internal transport barriers
Authors: Xu J.Q. , Peng X.D. , Chen W. , Hao G.Z. , Li J.Q. , Qu H.P. , Li Z.J. , He X.X. , Li Y.G. , Jiang M. , Yu X. , Wen J. , Yang Z.C. ,   the HL-2A Team
Published: September 2023

Abstract
The turbulent transport properties and dynamics of zonal flows (ZFs) in the presence of fast ions (FIs) are investigated for a typical internal transport barrier (ITB) plasma based on the gyrokinetic approach, focusing on the role of FI temperature and the effects of the toroidal rotation, including the E× B rotational shear, parallel velocity gradient (PVG) as well as the rotation velocity itself. Linear GENE simulations have shown that the core ITB plasma on HL-2A is dominated by ion temperature gradient (ITG) modes and trapped electron modes (TEMs), where the former is stabilized by FIs whereas destabilized by the PVG. Neither of the FIs or the PVG has observable effect on TEMs. The ion heat transport generally decreases at large FI temperature due to the nonlinear electromagnetic stabilization of turbulence with increased total plasma β until electromagnetic modes are excited. The transport fluxes peak around a certain FI temperature and the ZF shearing rate is significantly higher at such value compared with that in the absence of FIs, and the heat flux reduction is a result of the synergistic interaction between turbulence, ZFs and the external rotational shear. The E× B shear stabilizing and PVG destabilizing is not obvious at low normalized ITG R/L
Ti, indicating they are less important in determining the stiffness level in the relatively low density and rotation scenarios regarding the HL-2A ITB discharges. The turbulence suppression is predominated by the nonlinear stabilization of ITG turbulence as well as enhanced ZFs simultaneously in the presence of FIs. These results have also provided the possible way to reduce the turbulence transport through increasing the FI temperature in the off-axis neutral beam heated plasmas such as in HL-2A.
Taser - Stungun Semi-Automatic Advanced Security System Concept Test for Volvo FH - 12
Authors: Rojas Ruben Gregorio Ricra , Huánuco Franklin Javier Gutiérrez , Huamanchahua Deyby 
Published: September 2023

Abstract
Truck theft in Peru is ranked among the 10 most dangerous countries in the world. In that sense, the registered cases of vehicle theft in the year 2012 were a total of 16 357 and in the year 2019 was 20 159 stolen vehicles increasing a percentage of 18.89% in only 7 years. This paper shows as an objective, the development of the Proof of Concepts of an Advanced Security System Taser - Stungun semi-automatic for Volvo FH - 12. In this system, a TTL device (PIC) is used as hardware and a voltage booster from 5v to 5000v generating protection for the easiest and most valuable parts to steal. The proof of concept is activated by the user by buttons and sensors assigned for the protection of the truck, since the installed devices will be aesthetically located in the truck to not be found by the thief, besides being very reliable so that the driver can use it, also in its installation. The prototype will use a shock as self-defense since the system will generate an electric shock of 10 mA with a frequency of 2 seconds, which can immobilize or temporarily paralyze the thief. Therefore, it will analyze the alternatives with the help of the morphological matrix to choose the ideal solution, then we will design the electrical circuit, the programming in pseudocode, validating the proof of concepts, and the selection of the insulator. Finally, it must consider the correct selection of sensors and actuators thus allowing security reliability in different circumstances of the theft.
COMSOL Simulation of the Storage Life of Zinc-silver Reserve Battery
Authors: Tang Jun 
Published: September 2023

Abstract
We deduced the reaction kinetic equation of negative electrode zinc and oxygen at room temperature, and the solid-state reaction kinetics of AgO and silver, established the corresponding COMSOL model, verified and simulated the storage and discharge model, and predicted that the storage life of zinc-silver reserve battery is about 18-20 years.
Fault Warning Technology of Comprehensive Energy System Based on Digital Twins
Authors: Yao Jianhua , Chen Jieguang , Yan Huaizhe , Li Jingyu , Shen Chao , Huang Shenhai 
Published: September 2023

Abstract
The traditional energy industry has many problems, such as huge losses and non-renewability. With the development of informatization and digitalization, integrated smart energy systems have become a current research hotspot. At present, the research on integrated smart energy is still in the theoretical stage, and the fault warning part for integrated smart energy is still very scarce. Therefore, this article proposes a comprehensive energy failure warning technology based on digital twins. Firstly, the comprehensive energy system based on digital twins is divided into five layers, and the SOM algorithm is used to analyze the system’s status data for fault warning. Finally, the superiority of the proposed method was verified through experiments.
Optimal Dispatching of Energy Hub for New Energy Consumption
Authors: Liang Shuchao , Zhai Baoyu , Zhang Long , Li Xing , Xu Zhi , Li Zian 
Published: September 2023

Abstract
In recent years, with the continuous increase of wind power installed capacity, due to insufficient flexibility of the system, there has been a serious problem of wind power abandonment. In response to this phenomenon, this article improves the flexibility of the regional energy system by adding various flexible devices. Based on the concept of an energy hub, an energy hub model including wind power, CHP, heat pumps, heat storage, and other equipment is established. On this basis, considering system operating costs, wind abandonment penalty costs, and electricity purchase costs, a multi-objective regional energy system flexibility configuration model based on energy hubs was established to explore the feasibility of this model in improving wind power consumption. Finally, specific examples were combined in two different cases for analysis. The results indicate that the model has a very good effect on improving system flexibility and improving wind power consumption rate.
Distributed PV Location Selection Based on Hierarchical Optimization and Improved Genetic Algorithm
Authors: Cai Qiuna , Wu Guobing , Dong Kai , Zhao Yue , Chen Zhongfei , Xiao Yu 
Published: September 2023

Abstract
With the rapid development of Distributed Photovoltaic (DPV), the photovoltaic installed capacity of 10 kV and below is gradually increasing, and location selection and capacity planning are required to reduce the impact on the distribution network after the photovoltaic grid connection. Aiming at the access problem of distributed PV in distribution lines, the location and the capacity of DPV are optimized with the idea of layered optimization. The upper level uses improved GA to optimize regional DPV capacity, and the lower layer uses Matlab and OpenDSS to combine multi-objective optimization with minimum network loss and voltage offset and timing power flow calculation to optimize the location and capacity of the DPV within the region. A 10 kV line in Hainan is taken as an example to verify the feasibility of the model.
A Control Method for Output Voltage Stability of Proton Exchange Membrane Fuel Cells
Authors: Liang Xiaojun , Liu Jun , Zheng Wei , Zhang Tianbao 
Published: September 2023

Abstract
The widely used PEMFC (Proton Exchange Membrane Fuel Cell) analysis found that when the REMFC load is changed, its instantaneous output voltage fluctuates, and it causes voltage loss. The main reason is that it is activated by activation. The characteristics of the three-proton exchange membrane fuel battery characteristics of Ohm overvoltage and thickness cause voltage loss. By using the corresponding empirical formula in the Matlab / Simulink environment, the study designs the PID and the Fuzzy PID Controllers. After the established dynamic model of PEMFC, it controls the hydrogen supply module, changes the ratio of hydrogen and oxygen input, and indirectly controls the output voltage. Through experiments, it was found that Fuzzy PID Controller can achieve faster and smoother voltage stability than an ordinary PID Controller and less overshoot when load change, The controller can control the system voltage to reach a set point and to stabilize the supply voltage for the load.
Analysis of the inhomogeneous LPG-air flow field in a tube containing mixed obstructions
Authors: Gao Jianfeng , Wu Yang , Shao Xiaojun , Han Yanan , Guo Bingang , Liang Jianjun 
Published: September 2023

Abstract
Based on numerical simulation, this paper further investigates the flow field structure near the obstacle during the premixed gas deflagration. In the deflagration flow field, the pressure gradient variation and vortex structure intensity in the upper surface region of the obstacle are larger, indicating that the pressure gradient has a stronger effect on the vortex structure. The changes in density gradients and pressure gradients induced by the combined rectangular, flat barrier configuration will be more pronounced than in the model with only flat barriers. This change in turn acts back on the combustion field, which in turn has a strong perturbative effect on the flame.
Research on energy flexibility demand analysis and evaluation method of power systems with a high proportion of new energy
Authors: Sun Wei , Lu Zhaojun , Wang Hongwei , Zhang Wen , Liu Zirui , Shu Jun 
Published: September 2023

Abstract
With the increase of the scale of highly uncertain power supply in the system, the system needs more and more energy flexibility. Existing studies focus more on short-term energy demand volatility changes and lack quantitative means to analyze the system’s demand for energy flexibility at different time scales. Aiming at the above problems, this paper proposes an energy flexibility demand analysis and evaluation method for power systems with a high proportion of new energy. It constructs an energy flexibility demand evaluation index system at different time scales. Combined with the analysis of domestic provincial cases, the results verify the effectiveness of the proposed method.
Application study of the power control system for air-cooled proton exchange membrane fuel cell based on fuzzy adaptive with heuristic adaptive period strategy
Authors: Gan Zhenning , Liu Zhi , Deng Zhijun , Zhao Chen 
Published: September 2023

Abstract
As a zero-emission, non-polluting power generation device, hydrogen fuel cells are of great interest to the global industry with the advantages of high-power generation efficiency, wide source, and wide application scenarios. Influenced by various factors, it leads to a complex fuel cell control system and unstable output characteristics, which is one of the difficulties in the current technology development. In this section, an embedded power control system according to an STM32 microcontroller is developed to improve the steady-state characteristics of cathode open air-cooled fuel cell (PEMFC), and a fuzzy adaptive PID control algorithm according to the heuristic adaptive strategy of time interval is proposed. The control system achieves real-time detection of operating status. It maintains the stable output of cathode open air-cooled PEMFC by predicting vehicle speed in real-time to precisely control the hydrogen supply and external additional fans to control the operating temperature by the control strategy.
Multi-time Scale Coordinated Optimization Scheduling Considering Flexible Resources
Authors: Song Mingshu , Su Changsheng , Gao Guangmang , Xu Xinyu , Zhu Qing , Zhang Siwen , Wu Maoqian , Ma Lei 
Published: September 2023

Abstract
With the growth of new energy installations such as wind power and photovoltaic, the contradiction between supply and demand balance in the power system is becoming increasingly prominent, mainly reflected in the abandonment of new energy, deep peak shaving of units, and Primary Frequency Regulation of units. This article proposes a multi-time scale optimization scheduling strategy that considers multi-link flexible resources. It aims to promote the consumption of clean energy, enhance the flexibility of the power system, and promote the coordinated operation of different time scales. Firstly, the operational characteristics of the power system at different time scales were analyzed, and the current situation and problems of deep peak shaving and Primary Frequency Regulation were analyzed. Secondly, an optimization model was established with the goal of minimizing system operating costs and new energy waste electricity, which includes three stages: weekly optimization, daily optimization, and real-time optimization. Finally, an IEEE-30 node network structure was used for example verification, and the results showed that the proposed scheduling mode could effectively improve system flexibility.