bluuebunny/crossref_metadata_2025_split huggingface dataset:
Multi-image encryption based on 3D space scrambling and new spatiotemporal chaotic system
Authors: Hanrui Lu , Teng Lin , Du Longbiao 
Published: September 2024

Abstract
This paper introduces a groundbreaking spatiotemporal chaotic system, named DCMLMDF, and a novel encryption method that synergizes scrambling and diffusion synchronization for multi-image encryption. The DCMLMDF system, which incorporates a dynamic coupling approach and a random delay feedback mechanism, significantly enhances the randomness and complexity of the encryption process. By applying this system within the newly designed multi-image encryption framework, the method achieves three-dimensional space scrambling and diffusion synchronization, overcoming traditional encryption challenges such as extended encryption time and periodic vulnerabilities. The results demonstrate that this innovative approach not only effectively confuses image data but also substantially improves overall system security, marking a significant advancement in the application of chaotic systems to image encryption.
Growth temperature-dependent properties of electrodeposited CdSe thin films for optoelectronic application
Authors: Yimamu A U , Yagoub M Y A , Dejene B F , Echendu O K , Terblans J J , Kroon R E , Motloung S J 
Published: September 2024

Abstract
Cadmium selenide (CdSe) thin films were synthesized using a two-electrode electrodeposition technique in potentiostatic mode. The solution matrix contains 0.3 M Cd(NO3)2.4H2O and 0.03 M SeO2 on conductive glass substrates/fluorine-doped tin oxide (FTO). The electrodeposited CdSe thin films were examined at various growth temperatures of 55, 65, and 85 °C, both as-deposited (AD) and annealed (HT) samples. A polycrystalline cubic structure of the prepared CdSe thin films was identified using x-ray powder diffraction. The energy bandgap of films was found to vary with deposition temperature and was recorded as 1.85, 2.00, and 2.13 eV for AD and 1.86, 2.16 and 2.70 eV for HT samples deposited at 55, 65, and 85 °C, respectively. Surface morphology images show that the form and grain size varied with growth temperature. The average surface roughness varied with deposition temperature. The elemental analysis confirmed that the proportion of cadmium (Cd) increased while that of Se decreased as the deposition temperature increased for both AD and HT films. The film that was deposited at low temperature (55 °C) can be as a layer for absorption. Conversely, however the film deposited at a high growth temperature (85 °C) is capable of serving as a buffer layer in thin-film solar cell technology.
Surface modification of carbon fibres via plasma-activated water for mitigating burnout risk from direct plasma treatment
Authors: Ma Leisi , Liu Yongle , Guo Xuanying , Guo Ying , Xu Shaofeng , Shi Jianjun 
Published: September 2024

Abstract
This study presents a novel plasma jet discharge device designed to indirectly treat carbon fibre materials with plasma-activated water. This innovative method effectively mitigates issues related to carbon fibre conduction and combustion, which are common challenges encountered when directly modifying fibres using a plasma jet. Specifically, the atmospheric composition is adjusted to modulate the active particles in the liquid phase. The experimental results demonstrate that this technique significantly increases the surface wettability of carbon fibres without damaging their structure. Under the conditions of argon/oxygen cascade discharge, oxygen-containing substances generate ionomers that activate the water, which in turn introduces oxygen-containing groups (e.g., C−O, C=O, O−C=O) onto the carbon fibre surface. These groups catalyse monomer polymerisation on the material surface, which increases the wettability of the carbon fibres, as evidenced by a significant reduction in the water contact angle from 80.12° to 55.31°. This in turn improves the bonding strength with epoxy resin and slightly increases the monofilament strength. Furthermore, composites produced by this method exhibit 21% higher interlaminar shear strength than the untreated sample and an increased O/C ratio of up to 24.55%. In summary, these findings provide a valuable theoretical basis for enhancing the surface properties of carbon fibre composites through plasma–liquid interactions and open new possibilities for high-performance carbon fibre–resin matrix composites.
The exact solution of the Wegner flow equation with the Mielke generator for 3 × 3 hermitian matrices
Authors: Masłowski Tomasz 
Published: September 2024

Abstract
The Wegner flow equation is a differential equation for a family of Hamiltonians and can be considered as a continuous unitary transformation. In essence, the transformation continuously decouples degrees of freedom and gradually converts the transformed Hamiltonian into the near-diagonal form. The Wegner flow equation has so far been applied to many areas of physics, but mainly in perturbative calculations. However, the exact solutions are known only for the simplest of two-dimensional case and this certainly limits the practical application of the method. On the other hand, the knowledge of exact solutions is essential for many physical problems as well as it can help in constructing improved approximated approaches. In this paper we present the exact solution of the Wegner flow equation with the Mielke generator for 3 × 3 Hermitian matrices, the general solutions for N × N tridiagonal Hermitian matrices and partially for 4 × 4 real symmetric matrices.
An ab initio and monte carlo study of MS2/VS2 (M=Mo, W) ferromagnetic bilayer with negative magnetoresistance in MoS2/VS2 heterostructure
Authors: Lahiri Saurav , Kumar Manish , R Thangavel 
Published: September 2024

Abstract
Herein, the electronic and magnetic properties of ferromagnetic van der Waals MS2/VS2 (M=Mo, W) heterostructures, investigated using density functional theory (DFT) and Monte Carlo (MC) simulations are reported. Stability was confirmed via interlayer binding energy, and electronic band structure analysis revealed an indirect band gap with staggered (type II) heterojunctions. The systems exhibit potential for opto-spintronics devices due to large band offsets in both spin channels. Ferromagnetic ground states were identified with Curie temperatures of 299 K and 301 K for MoS2/VS2 and WS2/VS2, respectively. Biaxial strain studies indicated that while WS2/VS2 transitions to half-metallic behavior under tensile strain beyond 1%, the Curie temperatures decrease under both compressive and tensile strains, demonstrating tunable magnetic properties. Additionally, MoS2/VS2 heterostructures fabricated via drop casting exhibited negative magnetoresistance, suggesting potential in spintronics applications.
Electrolyte impact on supercapacitors made off Ni2O3-Ni2S3 decorating graphitic carbon nitride
Authors: Ben Gouider Trabelsi Amira , Alkallas Fatemah H , Esayed Asma M , Rabia Mohamed 
Published: September 2024

Abstract
Utilizing the hydrothermal method, we have successfully synthesized a promising composite material by adorning Ni2O3-Ni2S3 onto graphitic carbon nitride (G-C3N4). This composite’s structural and morphological characteristics were thoroughly examined through various analytical parameters. SEM and TEM images depict the incorporation of Ni2O3-Ni2S3 onto the 2D sheets of G-C3N4. Employing this nanocomposite, we have fabricated a supercapacitor with symmetric electrodes. Whatman filter paper, saturated with different electrolytes—HCl, Na2SO4, and KOH—was the separator between the electrodes. A series of tests were conducted to assess the electrical performance of the supercapacitor, including charge/discharge cycles, cyclic voltammetry, impedance, and lifetime measurements. At a current density of 0.3 A g−1, distinct charge and discharge times were observed for each electrolyte: 790 s for HCl, 140 s for Na2SO4, and 358 s for KOH. The supercapacitor’s energy density (E) varied depending on the electrolyte employed. Similarly, HCl achieved optimal performance, yielding the E value of 84.8 W.h.kg-1. Conversely, Na2SO4 showed reduced values at 9.5 W.h.kg−1, while KOH had the lowest values at 5.5 W.h.kg−1. The results unmistakably establish that the supercapacitor’s performance adheres to the HCl > Na2SO4 > KOH sequence concerning the electrolytes used. Looking ahead, our team aims to advance toward developing a prototype for a supercapacitor, positioning it as a viable alternative to traditional batteries in energy storage applications.
A novel remaining useful life prediction based on transfer hybrid deep neural network under variable working conditions
Authors: Xia Yunzhong , Li Wanxiang , Ren Weijia 
Published: September 2024

Abstract
Deep learning-based methods for remaining useful life prediction (RUL) usually require the precondition that the training and test data obey the same distribution. In engineering applications, mechanical equipment is frequently under different working conditions, which can lead to significant differences in the distribution of collected data and difficulties in obtaining labels. This paper proposed a novel RUL prediction method based on transfer hybrid deep neural network to solve the above problems. Firstly, a degradation feature extraction strategy and a clustering hybrid feature screening strategy are proposed to enrich the information content of degradation features and obtain manual features with significant degradation trends. Then, a multi-stage shrinkage attention temporal convolution network is used to adaptively extract strongly expressive and information-rich deep features from the raw data. Next, a bidirectional convolutional gated recurrent unit based on bidirectional learning and convolutional operations is designed to achieve the fusion of manual and deep features and improve the quality of degradation features. Finally, the unsupervised domain adaptation strategy is used to reduce the differences in the distribution of degradation features between training and test data and to achieve feature alignment. This paper validates the effectiveness of the proposed method on six transfer tasks. The experimental results show that the RUL prediction effectiveness of the proposed method is better than other methods.
Soliton dynamics in partially

P
T

-symmetric two-dimensional Bessel lattices
Authors: Felix-Rendon Ulises , Iakushev Denis , Bilal Muhammad Musavir , Lopez-Aguayo Servando 
Published: September 2024

Abstract
We study the dynamics of two-dimensional spatial solitons supported by partially-parity-time (

P
P
T

)-symmetric optical Bessel lattices. We show that these solitons with an imposed tilt can follow an oscillating or even a whole rotary trajectory in the transverse plane guided by a Bessel optical lattice. Due to the complex optical potential, these rotary solitons can also suffer from amplification or attenuation. Interestingly, we found that it is possible to find quasi-stability regions of parameters where there is a balance between the imposed tilt and the

P
P
T

-symmetric potential, allowing the launched spatial dissipative solitons to complete several rotations in their propagation.
Chirped grating for TE-five/TM-three reflective distribution feature
Authors: Xu Yuqing , Wang Bo , Zhan Hongwei , Li Jinjie 
Published: September 2024

Abstract
This research expounds on a novel reflective chirped grating, characterized by its differentiated functionality under various polarization modes. Under perpendicular incidence, this intricately grating produces a quintuple-channel diffraction output of the 0th, ±1st, and ±2nd orders in transverse electric (TE) polarization and a triple-channel diffraction output of the 0th and ±1st orders in transverse magnetic (TM) polarization. Both polarization modes exhibit excellent overall diffraction efficiency and uniformity. At an incident wavelength of 1550 nm, the diffraction efficiencies for the 0th, ±1st, and ±2nd orders under TE polarization are 20.16%, 19.27%, and 20.25%, respectively. Simultaneously, under TM polarization, the efficiencies for the 0th and ±1st orders are 31.79% and 31.57%, respectively. Grating parameters were meticulously derived using the finite element method (FEM) and subsequently corroborated through rigorous coupled-wave analysis (RCWA) to ensure superior grating accuracy. The study also exhaustively analyzes the manufacturing tolerances and robustness of the grating, affirming its practical applicability and effectiveness in practical applications. The dual-function grating splitter proposed in this paper enables the implementation of multiple functionalities within simple setups, suitable for applications requiring varied beam splitting. As photonic systems and fiber technology evolve, the potential applications of dual-function reflective splitters in these fields are increasingly highlighted.
Simulations of distributed-phase-reference quantum key distribution protocols
Authors: Abhignan Venkat , Jamunkar Abhishek , Nair Gokul , Mittal Mohit , Shrivastava Megha 
Published: September 2024

Abstract
Quantum technology can enable secure communication for cryptography purposes using quantum key distribution. Quantum key distribution protocol establishes a secret key between two users with security guaranteed by the laws of quantum mechanics. To define the proper implementation of a quantum key distribution system using a particular cryptography protocol, it is crucial to critically and meticulously assess the device’s performance due to technological limitations in the components used. We perform simulations on the ANSYS Interconnect platform to study the practical implementation of these devices using distributed-phase-reference protocols: differential-phase-shift and coherent-one-way quantum key distribution. Further, we briefly describe and simulate some possible eavesdropping attempts, backflash attack, trojan-horse attack and detector-blinding attack exploiting the device imperfections. The ideal simulations of these hacking attempts show how partial or complete secret key can be exposed to an eavesdropper, which can be mitigated by the implementation of discussed countermeasures.
Neutron stars in f(R,T) theory: slow rotation approximation
Authors: Murshid Masum , Kalam Mehedi 
Published: September 2024

Abstract
In this paper, we study the slowly rotating neutron stars in f(R, T) gravity based on Hartle-Thorne formalism. We first consider the simplest matter-geometry coupled modified gravity, namely f(R, T) = R + 2χ
T. We compute the mass, radius, moment of inertia, change in radius, and binding energy due to rotation, eccentricity, quadrupole moment, and the tidal love number. The quantities, which are of the second order in angular velocity, like change in radius and binding energy due to rotation, eccentricity, and quadrupole moment, deviate more from their corresponding general relativistic counterparts in lighter neutron stars than heavier ones. Whereas the moment of inertia, which is of the first order in angular velocity, in f(R, T) = R + 2χ
T modified gravity, barely diverges from the general relativistic one. The Equation of state-independent I-Love-Q relation retains in this f(R, T) modified gravity, and it coincides with the general relativistic ones within less than one percent even for the maximum allowed coupling parameters. We also study the slowly rotating neutron star in f(R, T) = R + αR
2 + 2χT up to first order their angular velocity. We calculate the mass, radius, and moment of inertia of neutron stars in this modified gravity. The results show that the impact of the matter-geometric coupling parameter is greater on lighter neutron stars in both of these modified gravity models.
The rotating solutions beyond the spontaneous scalarization in Einstein-Maxwell-scalar theory
Authors: Xiong Wei , Zhang Cheng-Yong , Li Peng-Cheng 
Published: September 2024

Abstract
The Einstein-Maxwell-scalar (EMS) theory with a quartic coupling function features three branches of fundamental black hole (BH) solutions, labeled as cold, hot, and bald black holes. The static bald black holes (the Reissner-Nordström BH) exhibit an intriguing nonlinear instability beyond the spontaneous scalarization. We study the rotating scalarized black hole solutions in the EMS model with a quartic coupling function through the spectral method numerically. The domain of existence for the scalarized BHs is presented in the spin-charge region. We found that the rotating solutions for both the two scalarized branches possess similar thermodynamic behavior compared to the static case while varying the electric charge. The BH spin enlarges the thermodynamic differences between the cold and hot branches. The profile of the metric function and the scalar field for the scalarized BHs is depicted, which demonstrates that the scalar field concentrates more on the equatorial plane in contrast to the axisymmetric region as the spin increases.
Analysis of biospeckle pattern using grey-level and color-channel assessment methods
Authors: Karnati Srivathsav , Pathak Biswajit 
Published: September 2024

Abstract
Biospeckle offers a practical tool for contact-free testing and monitoring of biological samples, providing unique insights into dynamics of biological processes. In the present work, we design an experimental arrangement to perform quality assessment on biological samples using biospeckle patterns. We analyse the speckle patterns and evaluate its important parameters by constructing a grey-level co-occurrence matrix (GLCM). Furthermore, we propose an alternative and reliable method to study the biospeckle patterns by constructing a color-channel assessment matrix. The proposed approach provides both qualitative and quantitative information of the sample under study, with minimum speckle images and no stringent requirement of correct parameter selection, unlike in the case of GLCM method. Proof-of-concept experimental results are provided that demonstrate the feasibility of the proposed method in evaluating the quality of biological samples.
Transition from electrostatic to electromagnetic modes of low-frequency fluctuations in RT-1
Authors: Saitoh H. , Nakagawa R. , Ueda K. , Mori T. , Nishiura M. , Kenmochi N. , Sato N. , Yoshida Z. 
Published: September 2024

Abstract
We report the electrostatic and electromagnetic behaviors of low-frequency fluctuations and their spatial structures observed in the RT-1 (Ring Trap 1) levitated dipole experiment. By using movable Langmuir probes capable of operating under the high-heat flux conditions, we investigated the spatial structures of electrostatic fluctuations in the plasma and compared them with magnetic fluctuation properties. Low-frequency electrostatic fluctuations in low-beta plasma transact into electromagnetic modes in high-beta operation, the latter of which has been found with edge magnetic probes in previous studies. Multi-point measurements with the Langmuir probes revealed that, in low-beta plasma, the fluctuations propagate in the electron diamagnetic direction and exhibit a toroidal mode number of 3 or 4 in a broad region across different magnetic surfaces. In the high-beta plasma, the phase velocity of the fluctuations has a clear dependence on the magnetic surfaces and reverses its toroidal propagation direction according to plasma conditions. These observations are consistent with the interpretation that density fluctuations transported by the drift motion of plasma generate magnetic fluctuations in high-beta conditions, suggesting a similarity with the so-called entropy mode.
Research on production scheduling method of cement plants considering demand response and carbon trading
Authors: Liu Penglong , Zhang Zhi , Li Congcong , Jing Zhen , Wang Pingxin , Wang Qing 
Published: September 2024

Abstract
A production scheduling method for cement plants considering demand response (DR) and carbon trading is proposed. Firstly, the production process of the cement plant is analyzed, and the load DR model of the cement plant is established. Secondly, the carbon emission mechanism of cement plants is analyzed, the quantitative expression between carbon emission and production arrangement is established, and the stepped carbon trading model is used to calculate carbon trading costs. Finally, a production scheduling model for cement plants is established, which takes DR and carbon trading into consideration. By optimizing the power purchase and production plan of each link, the goal of minimum power purchase cost and carbon transaction cost is achieved. The example analysis shows that the proposed method can realize the electric-carbon collaborative optimization of cement plants under the power market and carbon market.
Transient analysis of the trans-critical CO2 adjustable ejector
Authors: Liu Yue , Liu Fang , Ding Jiqiang 
Published: September 2024

Abstract
In the adjustable CO2 ejector refrigeration system, the needle of the ejector as the component for regulation has a great impact on the performance of the refrigeration system. This paper investigates the changes in the entrainment ratio resulting from the adjustment of the needle position when two different needles are used. The results show that the Transient and steady state changes in the entrainment ratio are the same when a round needle is used, while the tip needle has a large change. At the same time, the round needle has a larger entrainment ratio relative to the tip needle when the throat area is reduced by the same percentage. The use of a round needle improves performance and stability during transient changes. For the round needle, with the increase of throat area reduction, the pressure change in the mixing section is reduced, and the surge in the mixing section is also reduced to a certain extent.
Based on the WSP-Optuna-LightGBM model for wind power prediction
Authors: Xiang Bo , Liu Zhenqing , Huang Linhong , Qin Ming 
Published: September 2024

Abstract
In order to optimize energy dispatch and enhance the predictive performance of wind power forecast, this study proposes a WSP-Optuna-LightGBM mixed regression prediction model based on wind speed-power curve (WSP), Optuna parameter optimization, and Light Gradient Boosting Machine (LightGBM). The first step of this study involves utilizing historical wind speeds and actual power generated by wind turbines to develop a wind speed-power curve. The curve is used to estimate the output power of the turbines at any given moment, serving as inputs for the model. Next, this study processes historical data from the wind farm and continuously optimizes the model using cross-validation and the Optuna algorithm. Finally, the data prediction results under the WSP-Optuna-LightGBM regression prediction model are obtained. Experiments based on two assessment indicators are conducted to analyze the predictive performance of the wind power prediction model. The results demonstrate that the proposed method exhibits greater accuracy in its predicted values when compared with other wind power prediction models.