bluuebunny/crossref_metadata_2025_split huggingface dataset:
Applications of different machine learning methods on nuclear charge radius estimations
Authors: Bayram Tuncay , Yeşilkanat Cafer Mert , Akkoyun Serkan 
Published: October 2023

Abstract
Theoretical models come into play when the radius of nuclear charge, one of the most fundamental properties of atomic nuclei, cannot be measured using different experimental techniques. As an alternative to these models, machine learning (ML) can be considered as a different approach. In this study, ML techniques were performed using the experimental charge radius of 933 atomic nuclei (A ≥ 40 and Z ≥ 20) available in the literature. In the calculations in which eight different approaches were discussed, the obtained outcomes were compared with the experimental data, and the success of each ML approach in estimating the charge radius was revealed. As a result of the study, it was seen that the Cubist model approach was more successful than the others. It has also been observed that ML methods do not miss the different behavior in the magic numbers region.
Bifurcation analysis, chaotic analysis and diverse optical soliton solutions of time-fractional (2+1) dimensional generalized Camassa-Holm Kadomtsev-Petviashvili equation arising in shallow water waves
Authors: Gupta Rajesh Kumar 
Published: October 2023

Abstract
This paper presents a study on (2+1) generalized Camassa-Holm Kadomtsev-Petviashvili equation, which is used to describe the behavior of shallow water waves in nonlinear media. The considered equation provides a more accurate description of wave behavior compared to linear wave equations and can account for wave breaking and other nonlinear effects. This model can be used to describe and study the behavior of nonlinear waves such as rogue waves in complex fluid dynamics scenarios. This includes the behavior of waves in stratified fluids, nonlinear dispersive media and wave interactions in fluid flows with varying velocities and densities. The bifurcation analysis of the governing equation has been performed using the planar dynamical system method. The chaotic behavior of the dynamical system has been examined by utilizing various techniques such as time series analysis and the construction of 2D and 3D phase space trajectories. Furthermore, the introduction of a perturbed term has resulted in the observation of chaotic and quasi-periodic behaviors across a range of parameter values. The considered equation has been reduced to ordinary differential equation by performing symmetry reduction. The Kudryashov method has been used to obtain the exact solution of reduced equation. The single soliton solution of governed equation has been obtained by using Hirota method and impact of fractional parameter on the obtained solution has been studied using graphical representation. The extended sinh-Gordon equation expansion method and modified generalized exponential rational function method have been exploited to obtain dark, bright and singular soliton solutions of considered equation. The motivation for this study arises from the need to understand and analyze the complex dynamics of shallow water waves in nonlinear media with a particular focus on the (2+1) generalized Camassa-Holm Kadomtsev-Petviashvili equation. By performing symmetry reduction and applying various analytical methods, we aim to unravel the intricate behavior and soliton solutions of considered equation, contributing to the broader understanding of nonlinear wave phenomena.
Research on Ultra-wide Bandwidth Low-frequency Signal Channelization for Xinjiang 110 m Radio Telescope
Authors: Zhang Hai-Long , Zhang Ya-Zhou , Zhang Meng , Wang Jie , Li Jian , Ye Xin-Chen , Pei Xin 
Published: October 2023

Abstract
Aiming at the subband division of ultra-wide bandwidth low-frequency (UWL) signal (frequency coverage range: 704–4032 MHz) of the Xinjiang 110 m QiTai radio Telescope (QTT), a scheme of ultra-wide bandwidth signal is designed. First, we analyze the effect of different window functions such as the Hanning window, Hamming window, and Kaiser window on the performance of finite impulse response (FIR) digital filters, and implement a critical sampling polyphase filter bank (CS-PFB) based on the Hamming window FIR digital filter. Second, we generate 3328 MHz simulation data of ultra-wideband pulsar baseband in the frequency range of 704–4032 MHz using the ultra-wide bandwidth pulsar baseband data generation algorithm based on the 400 MHz bandwidth pulsar baseband data obtained from Parkes CASPSR observations. Third, we obtain 26 subbands of 128 MHz based on CS-PFB and the simulation data, and the pulse profile of each subband by coherent dispersion, integration, and folding. Finally, the phase of each subband pulse profile is aligned by non-coherent dedispersion, and to generate a broadband pulse profile, which is basically the same as the pulse profile obtained from the original data using DSPSR. The experimental results show that the scheme for the QTT UWL receiving system is feasible, and the proposed channel algorithm in this paper is effective.
A new paradigm for fast and repetitive chirping of Alfvén eigenmodes
Authors: Cheng Junyi , Zhang Wenlu , Lin Zhihong , Bao Jian , Dong Chao , Cao Jintao , Li Ding 
Published: October 2023

Abstract
A novel 2D nonlinear dynamical paradigm is constructed to interpret the fast and repetitive frequency chirping and amplitude oscillation of Alfvén eigenmodes excited by energetic particles in fusion plasmas as observed in global gyrokinetic simulations. In this non-perturbative paradigm of the collisionless phase-space dynamics, wave-particle resonant interactions cause the phase-space structure to continuously twist and fold, leading to the repetitive excitation and decay of the Alfvén eigenmode. The radial (perpendicular to the dominant wave-particle interaction) dependence of the mode amplitude and toroidal precessional drifts of the energetic particles leads to the 2D dynamics of wave-particle interactions, which is found to be responsible for the repetitive process of formation and destruction of the mode structure.
A cooperative game-based vulnerability assessment method for distribution lines in typhoon weather
Authors: Fan Xiaoyue , Hou Shuainan 
Published: October 2023

Abstract
Identification and protection of vulnerable lines is the key point of typhoon disaster prevention in distribution networks in coastal areas. This paper proposes a comprehensive lines vulnerability assessment method based on combined weight using cooperative games. Firstly, a distribution line vulnerability evaluation index system is constructed from four aspects: line fault probability, line loss value, line electric betweenness, and line degree. Secondly, the entropy method and CRITIC weight method are used to calculate the weights of each evaluation index in the evaluation system, respectively, and the cooperative game method is used to combine the two weights. Finally, the combined weight is used to evaluate the vulnerability of the line. The power distribution system in a certain area is used for the example simulation, and the key vulnerable lines of the distribution network can be identified, which shows the rationality and effectiveness of the proposed method.
The Capacity Configuration of Energy Storage System in DC Microgrid with Source-storage Integration
Authors: Wei Tianliu , Li Weiwei , Guo Fang , Wang Ruiyang , Wei Chengzhi , Zheng Bingyao 
Published: October 2023

Abstract
The occurrence of a fault in a DC microgrid can significantly jeopardize the system’s safe operation, making it a critical area of research for scholars. One key focus of this research is on developing methods to suppress the fault current, which has become a research hotspot for many scholars. Each distributed power source is connected to DC microgrid through a battery storage system to form a source-storage integration DC microgrid structure, which can have good fault current control ability and obvious improvement effect on reducing the protection technology difficulty of DC microgrid and enhancing the flexibility of distribution network. Compared with the traditional DC microgrid structure, the source-storage integration DC microgrid, whose battery storage system is changed from centralized to distributed, will smooth fluctuations in distributed power output by modifying energy storage planning principles, and also maintain bus voltage and realize fault current control with distributed power sources. Capacity planning principles for energy storage systems proposed in this paper were studied for DC microgrids with source-storage integration, and the total energy storage capacity and power under two DC microgrid structures were compared and analyzed with a scenic complementary power station as an example. Although a DC microgrid with a changed grid structure would require less than a 20% increase in the overall capacity and power of the energy storage system, according to the calculation results, the operation of the microgrid can be significantly improved, the flexibility of power dispatching of the distribution network was enhanced, and the investment cost of fault protection was reduced. Research into the capacity configuration of energy storage systems has demonstrated that DC microgrids with integrated source and storage capabilities hold significant engineering application value and practical significance.
Research on Solid-state Optical Filtering Technology Using Faraday Anomalous Dispersion in Rare Earth-doped Crystals
Authors: Wen Kailun , Bai Xuanyao , Liu Shuangqiang , Luo Le 
Published: October 2023

Abstract
This paper proposes a Faraday anomalous dispersion optical filter that uses rare earth-doped crystals to overcome the limitations of current atomic filtering technology, which include limited working wavelength and Doppler broadening. The paper analyses Er3+: LiYF4 1530 nm as an example filter. The results show that the proposed filter achieves high transmission while maintaining an ultra-narrow bandwidth transmission spectrum. The maximum transmission efficiency reaches 94.8% with a transmission bandwidth of hundred trillions HZ. The position of the transmission peak can be tuned by adjusting the size of the magnetic field, enabling the conversion of the transmission spectrum between the line center and the line wing.
Effect of Sheet Thickness on Forming Precision in Single Laser Shock Forming with Mold
Authors: Zhang Yan , Zhang Xingquan 
Published: October 2023

Abstract
Laser shock forming (LSF) is one of the sheet metal dynamic forming techniques that employ laser-induced shock waves to form sheet metal into complex three-dimensional parts rapidly. This work investigates the effect of sheet thickness on the forming precision in laser shock forming with mold. ABAQUS/Explicit analysis software is adopted to study the effect of sheet metal thickness on forming accuracy. The corresponding forming experiments with sheet thickness arranged from 0.1mm to 0.4 mm are conducted to validate those numerical values. The numerical and experimental results indicate that the sheet thickness plays an important role in the precision of the formed parts, with the increase of sheet thickness, the forming precision is decreased.
Direct Band-gap 1.64μm Electroluminescence from Edge Emitting Germanium Diode for Near-infrared Application
Authors: Yang Jiayin , Chen Lei , Zhang Long , Xiong Kaili 
Published: October 2023

Abstract
Germanium has been considered as a promising material for near-infrared optical devices due to its higher carrier mobility and adjustable band structure. In this study, the low temperature combined with high temperature (LT-HT) two-step method is utilized to fabricate the edge emitting germanium diode who can be an application for near infrared. The tensile strain of the germanium layer is determined by XRD and Raman, which are about 0.3%. The TEM results show a high material quality near the surface of the Ge layer with few defects at the Si/Ge interface. Then, the chip is packaged to facilitate testing and protect the device. The I-V characteristics indicate a reserve saturation current of about 10−3A/cm2 at -0.1V in the dark. The EL measurement with a stable EL peak at 1640nm was observed.
Design Method of Meta Operators Based on Equivalence Class Distribution
Authors: Shu Guoqiang , Fei Yangyang , Yi Zongjiang , Xu Jinchen , Liu Fudong , Shan Zheng 
Published: October 2023

Abstract
Currently, there are many physical systems for quantum computing and to adapt to the physical characteristics of different systems, engineers have designed different basic gate groups for gate circuit calculation models. The quantum algorithm realizes the evolution of the quantum state by applying unitary operators to the quantum states, and the results are obtained by measuring the outputs. These operators will be done in the corresponding physical system by compiling and decomposing into hardware supported basic gates. Universal fundamental gates can construct all quantum algorithms, but their computational efficiency is limited. Drawing on the idea of meta operators in classical machine learning, by constructing a deep learning framework for deep learning models, the common computational logic of operators in different deep learning frameworks is abstracted as ‘meta operators’ [1, 2]. This article aims to study and propose the common computational logic of quantum computing with geometric equivalence class distribution methods, using the volume size of the equivalence class space as a performance indicator for meta operators and identifying the optimal meta operators to optimize the depth of the circuits in the experiments. Which proves the effectiveness of the design method proposed and provides solutions for quantum circuit optimization and dedicated gate design.
Spatially divided two-step phase-shifting method for computational optical scanning holography
Authors: Yoneda Naru , Matoba Osamu 
Published: October 2023

Abstract
Computational optical scanning holography (COSH) is one of the single-pixel incoherent digital holographic techniques; therefore, three-dimensional fluorescent objects can be measured as a digital hologram with a single-pixel detector. However, due to the requirement of a phase-shifting method to remove unnecessary components from holograms, the number of measurements of COSH is larger than the number of pixels. To reduce the number of measurements, the spatially divided phase-shifting method has been proposed. Similar to the parallel four-step phase-shifting digital holography, the spatially divided phase-shifting method can obtain four phase-shifted holograms simultaneously. However, the spatially divided phase-shifting method has a problem in that the spatial resolution is lower than the original COSH. In this paper, a spatially divided two-step phase-shifting method is proposed to improve spatial resolution. The numerical evaluation results indicate the feasibility of the proposed method. In addition, the proposed method is applied to microscopy for proof of principle experiment. The experimental results indicate the proposed method improves the image quality compared with the conventional spatially divided four-step phase shifting method.
Phonon-mediated magneto-resonances in biased graphene layers
Authors: Pandey Mrityunjay , Watanabe Kenji , Taniguchi Takashi , Raghavan Srinivasan , Chandni U 
Published: October 2023

Abstract
We explore the non-equilibrium transport regime in graphene using a large dc current in combination with a perpendicular magnetic field. The strong in-plane Hall field generated in the graphene channel results in Landau levels that are tilted spatially. The energy of cyclotron orbits in the bulk varies as a function of the spatial position of the guiding center, enabling us to observe a series of compelling features. While Shubnikov–de Haas oscillations are predictably suppressed in the presence of the Hall field, a set of fresh magneto resistance oscillations emerge near the charge neutrality point as a function of dc current. Two branches of oscillations with linear dispersions are evident as we vary carrier density and dc current, the velocities of which closely resemble the transverse acoustic (TA) and longitudinal acoustic (LA) phonon modes, suggestive of phonon-assisted intra-Landau level transitions between adjacent cyclotron orbits. Our results offer unique possibilities to explore non-equilibrium phenomena in two-dimensional materials and van der Waals heterostructures.
Polarization-tuneable excitonic spectral features in the optoelectronic response of atomically thin ReS2
Authors: Vaquero Daniel , Arroyo-Gascón Olga , Salvador-Sánchez Juan , Alcázar-Ruano Pedro L , Diez Enrique , Perez-Rodríguez Ana , Correa Julián D , Dominguez-Adame Francisco , Chico Leonor , Quereda Jorge 
Published: October 2023

Abstract
The low crystal symmetry of rhenium disulphide (ReS2) leads to the emergence of dichroic optical and optoelectronic response, absent in other layered transition metal dichalcogenides, which could be exploited for device applications requiring polarization resolution. To date, spectroscopy studies on the optical response of ReS2 have relied almost exclusively in characterization techniques involving optical detection, such as photoluminescence, absorbance, or reflectance spectroscopy. However, to realize the full potential of this material, it is necessary to develop knowledge on its optoelectronic response with spectral resolution. In this work, we study the polarization-dependent photocurrent spectra of few-layer ReS2 photodetectors, both in room conditions and at cryogenic temperature. Our spectral measurements reveal two main exciton lines at energies matching those reported for optical spectroscopy measurements, as well as their excited states. Moreover, we also observe an additional exciton-like spectral feature with a photoresponse intensity comparable to the two main exciton lines. We attribute this feature, not observed in earlier photoluminescence measurements, to a non-radiative exciton transition. The intensities of the three main exciton features, as well as their excited states, modulate with linear polarization of light, each one acquiring maximal strength at a different polarization angle. We have performed first-principles exciton calculations employing the Bethe-Salpeter formalism, which corroborate our experimental findings. Our results bring new perspectives for the development of ReS2-based nanodevices.
Effect of carbon nanotube type and length on the electrical conductivity of carbon nanotube polymer nanocomposites
Authors: Elaskalany Mostafa , Behdinan Kamran 
Published: October 2023

Abstract
Carbon nanotube (CNT) type and length are two key factors that affect the electrical behavior of CNT/polymer nanocomposites. However, numerical studies that consider these two factors simultaneously are limited. This paper presented a stochastic multiscale numerical model to predict the electrical conductivity and percolation threshold of polymer nanocomposites containing single-walled carbon nanotubes (SWCNTs) and multi-walled carbon nanotubes (MWCNTs). The combined effects of CNT type and length on the electrical conductivity and percolation threshold of the polymer nanocomposites were investigated. The model predictions were validated against experimental data of commercially available CNTs. Our results showed that the effect of CNT type varied based on both the length and aspect ratio of the CNTs. Long SWCNTs exhibited the greatest enhancement of the polymer’s electrical conductivity with the lowest percolation threshold among all the CNT types studied.
Modulation of electrocatalytic activity by tuning anion electronegativity: case study with copper chalcogenides
Authors: Singh Harish , Prendergast David , Nath Manashi 
Published: October 2023

Abstract
Anion-tuning in metallic chalcogenides has been shown to have a significant impact on their electrocatalytic ability for overall water splitting. In this article, copper-based chalcogenides (Cu2
X, X= O, S, Se, and Te) have been systematically studied to examine the effect of decreasing anion electronegativity and increasing covalency on the electrocatalytic performance. Among the copper chalcogenides, Cu2Te has the highest oxygen evolution reaction (OER) activity and can sustain high current density of 10 and 50 mA cm−2 for 12 h. The difference in intrinsic catalytic activity of these chalcogenide surfaces have been also probed through density functional theory calculations, which was used to estimate energy of the catalyst activation step. It was observed that the hydroxyl adsorption on the surface catalytic site is critically important for the onset and progress of OER activity. Consequently, it was also observed that the –OH adsorption energy can be used as a simple but accurate descriptor to explain the catalytic efficiency through volcano-like correlation plot. Such observation will have a significant impact on developing design principle for optimal catalytic surface exhibiting high performance as well as prolonged stability.
Passively stretchable vacuum-powered artificial muscle with variable stiffness skin
Authors: Wang Tao , Wang Xi , Fu Guoqiang , Lu Caijiang 
Published: October 2023

Abstract
A passively stretchable vacuum-powered artificial muscle (VPAM) is proposed in this work that extends the deformation mode of the existing VPAM, allowing it to have passively stretchable properties while maintaining the performance benefits. The passively stretchable VPAM is made possible by a new variable stiffness skin consisting of two composite layers. Each composite layer is divided into two parts: a non-stretchable part and a stretchable part. When vacuum pressure is applied, the composite layers are jammed and the skin becomes non-stretchable. Conversely, in the absence of pressure, the skin becomes stretchable, making the VPAM stretchable. The behaviour of the actuator has been theoretically modelled and the corresponding experiments have been carried out. Since the behaviour of the actuator with the skin in jammed state is consistent with that of the existing VPAM, the effect of passive tensile deformation on the behaviour of this type of VPAM is primarily analyzed. It is shown that the passively stretchable properties not only make the VPAM more similar to the deformation behaviour of biological muscles, but also enable the regulation of the blocked force and maximum contraction rate of the VPAM. We believe that the proposed artificial muscle will contribute to new robotic systems and provide more inspiration to the robotics community.