bluuebunny/crossref_metadata_2025_split huggingface dataset:
Population dynamic study of interaction between two predators and one prey
Authors: Singh Khushbu , Kaladhar K 
Published: January 2024

Abstract
In the present study, we develop a set of ordinary differential equations that simulate the interactions of an ecological system with two predators and one prey. Here, we have investigated the interaction dynamics between one prey and two predators. The three dimensional ‘Lotka-Volterra prey-predator’ system’s stability has been investigated applying ‘Takagi-Sugeno (T-S) impulse control model’ and the Fuzzy impulse control model. After the model is created, numerical simulations are used to determine the model's global stability and fuzzy solution. Graphical representations are provided together with suitable explanation to understand the workings of our proposed model.
Head on collision of multi ion acoustic solitons with arbitrary degenerate electrons
Authors: Parveen Shahida , Mahmood Shahzad , Majid Mirza Arshad , Qamar Anisa 
Published: January 2024

Abstract
This study presents a head-on collision of ion-acoustic (IA) multiple solitons in unmagnetized quantum plasma with arbitrary degenerate electrons. The two-sided Korteweg–de Vries equations and phase shift associated with them have been derived using the extended Poincaré-Lighthill-Kuo (PLK) method. Depending on the quantum parameter’s value for the degenerate electrons, it is found that compressive and rarefactive solitons are formed. In addition, the Hirota bilinear approach is used to investigate the overtaking collision, and the expressions of phase shifts of multi-solitons interactions are determined. For a specific range of quantum diffraction, i.e, H < 2 compressional solitons propagating with supersonic speed, and for H > 2 the rarefactive solitons travelling with subsonic speed are found. A new nonlinear structure with a larger amplitude is produced during the collision in the interaction region. Graphically, the effects of different plasma parameters such as quantum diffraction and fugacity on interacting IA solitons structures and their associated phase shifts are investigated. The results of this study might help us to understand the collision of ion-acoustic solitons in an unmagnetized quantum plasma with arbitrary electrons degeneracy which can exist in astrophysical or laser plasma environment.
Constraints on axion-like particles from the observation of GRB 221009A by LHAASO
Authors: Gao Lin-Qing , Bi Xiao-Jun , Li Jun , Yao Run-Min , Yin Peng-Fei 
Published: January 2024

Abstract
The LHAASO collaboration recently reported the measurement of the gamma-ray spectra of GRB 221009A, which is the brightest burst ever, covering an energy range from 0.3 TeV to about 10 TeV. Based on the observation, we investigate the ALP-photon oscillation effect in the host galaxy of GRB 221009A and the Milky Way. The CLs method is applied to set constraints on the ALP parameters in this study. Given the uncertain magnetic field configuration in the host galaxy, we use three different models: a homogeneous magnetic field model, a magnetic field model identical to that of the Milky Way, and a model constructed from the HST observations of the host galaxy. We find that the constraints derived using these three host galaxy magnetic field models are comparable. Our results are complementary in the small ALP mass regions compared with other experiments.
Neutrino constraints on inelastic dark matter captured in the Sun
Authors: Chauhan Bhavesh , Reno Mary Hall , Rott Carsten , Sarcevic Ina 
Published: January 2024

Abstract
The flux of neutrinos from annihilation of gravitationally captured dark matter in the Sun
has significant constraints from direct-detection experiments. However, these constraints are
relaxed for inelastic dark matter as inelastic dark matter interactions generate less energetic
nuclear recoils compared to elastic dark matter interactions. In this paper, we explore the
possibility for large volume underground neutrino experiments to detect the neutrino flux from
captured inelastic dark matter in the Sun. The neutrino spectrum has two components: a
mono-energetic “spike” from pion and kaon decays at rest and a broad-spectrum “shoulder” from
prompt primary meson decays. We focus on detecting the shoulder neutrinos from annihilation of
hadrophilic inelastic dark matter with masses in the range 4–100 GeV and the mass splittings in
up to 300 keV. We determine the event selection criterion for DUNE to identify GeV-scale muon
neutrinos and anti-neutrinos originating from hadrophilic dark matter annihilation in the Sun, and
forecast the sensitivity from contained events. We also map the current bounds from
Super-Kamiokande and IceCube on elastic dark matter, as well as the projected limits from
Hyper-Kamiokande, to the parameter space of inelastic dark matter. We find that there is a region
of parameter space that these neutrino experiments are more sensitive to than the direct-detection
experiments. For dark matter annihilation to heavy-quarks, the projected sensitivity of DUNE is
weaker than current (future) Super (Hyper) Kamiokande experiments. However, for the light-quark
channel, only the spike is observable and DUNE will be the most sensitive experiment.
The influence of heating on the appearance of polarization singularities during the self-action of a Gaussian beam in the isotropic phase of a nematic liquid crystal in the pre-transition temperature region
Authors: Shishkov G M , Grigoriev K S , Makarov V A 
Published: January 2024

Abstract
Heating of the medium occurs during the self-action of elliptically polarized light in the isotropic phase of a nematic liquid crystal near the transition temperature to the mesophase. We studied the influence of heating of the medium, on the propagation modes of laser radiation and the dynamics of the formation of singularity lines of circular polarization in the cross sections of the beam, which is closely related to the multifocal structure of the electric field. It is shown that an increase in the incident radiation intensity leads to a decrease in distance from the front end of the cylindrical cuvette to the beam cross section, containing the primary (brightest and most stable) polarization singularity lines, as well as in the radius of the circle they form. The range of parameters of the incident radiation and medium at which the multifocal structure of the electric field of the propagating beam is formed, as well as the intensity threshold values at which it appears, decreases with the growth of the thermal conductivity coefficient of the liquid crystal.
Jordan decomposition of non-Hermitian fermionic quadratic forms
Authors: Kitahama Shunta , Yoshida Hironobu , Toyota Ryo , Katsura Hosho 
Published: January 2024

Abstract
We give a rigorous proof of conjecture 3.1 by Prosen (2010 J. Stat. Mech. 2010 P07020) on the nilpotent part of the Jordan decomposition of a quadratic fermionic Liouvillian. We also show that the number of Jordan blocks of each size can be expressed in terms of the coefficients of a polynomial called the q-binomial coefficient, and describe the procedure for obtaining the Jordan canonical form of the nilpotent part.
Two-stage robust programming model for active distribution network with a high proportion of renewable energy
Authors: Liu Chao , Zhang Peng , Huang Zongjun , Yang Liu 
Published: January 2024

Abstract
To reduce operating costs and obtain the optimal location and capacity of renewable energy access, a two-stage robust planning model is studied for active distribution networks with a high proportion of renewable energy access. To build a function to minimize annual comprehensive costs, the constraints of power flow, branch power, and node voltage of the active distribution network are studied. Considering the characteristics and properties of power flow safety constraints, the mixed integer second-order cone transformation is used to construct a mixed integer convex programming model, which is convenient for efficiently obtaining the global optimal solution. To avoid the influence of uncertainty, a two-stage robust model is constructed. The explicit maximum value method is used to obtain the solution results that satisfy the planning model of all uncertain problems. Experiments show that the model can obtain the optimal access position and capacity of renewable energy. After application, it can reduce the annual comprehensive cost of the distribution network and ensure the stable and safe operation of the active distribution network.
Active alarm method for switchgear status based on K-means clustering and multi-dimensional feature quantities
Authors: Zhou Jinglong , Zhi Ruifeng , Shang Yanyun , Li Zhenlin , Shang Shulei 
Published: January 2024

Abstract
Switchgear is the critical equipment of the distribution network, and its status evaluation is of great significance to improve the reliability of the distribution network. Addressing the issues of high subjectivity and low accuracy in current methods of status evaluation, we propose an active alarm method for switchgear status based on K-means clustering and multi-dimensional feature quantities. We configure multiple sensors at different locations inside the switchgear to monitor and obtain multi-source data based on IoT sensing technology. We establish a multi-dimensional status dataset of the switchgear and analyze its fluctuation. We acquire the relationship between the number of clusters K and the sum of squares of errors by clustering the obtained multi-dimensional dataset of switchgear through the K-means clustering status evaluation algorithm. We also calculate the sum of squares of errors under different clusters and the optimal number of clustering levels. Finally, we combine a set of switchgear operation data to obtain the switchgear health status by cluster analysis, which verifies the effectiveness of the evaluation method.
Numerical simulation of flow and heat transfer of n-decane in composite tube under supercritical pressure
Authors: Ma Hailong , Gao Hui , Zhao Jiajun , Zhang Chen , Wen Dongsheng 
Published: January 2024

Abstract
As scramjet propulsion systems face big challenges in thermal protection performance, regenerative cooling techniques have been proposed to improve heat transfer behavior. This study introduced a novel design of composite cooling channel with bends and conducted computational fluid dynamics (CFD) simulations to analyze the flow characteristics, heat transfer behavior, and pyrolysis of hydrocarbon fuel within the tube. Results show that the presence of bends significantly enhances heat transfer, leading to an increased temperature and conversion. The composite tube with 15 bends demonstrated a 19.9% increase in conversion rate compared to the straight tube. Hence, proper structure design can improve the regenerative cooling performance which may promote the development of scramjet propulsion systems.
Research on the additional drag of turboshaft engine inlet under complex aerodynamic interference
Authors: Cheng Benlin , Huang Xing , Shan Hang , Cui Jiahang , Cai Feichao 
Published: January 2024

Abstract
In response to the complex aerodynamic interference in the inlet flow field of a turboshaft engine and the difficulty in calculating additional drag, a study was conducted based on numerical algorithms to calculate additional drag. Through the numerical calculation of the internal and external interference flow field model of the helicopter rotor and body, the inlet, the integral component of the exit section parameter, and the inner channel drag are extracted, and the calculation model of additional drag based on the momentum balance of the inlet channel and the control body of the pre-inlet tube is established. The calculation and analysis are carried out according to different operating conditions such as flight speed and inlet flow change. The results show that the calculation model of additional drag based on the three-dimensional numerical value of the interference flow field, considering the aerodynamic interference of incoming flow conditions, rotor, and body on the flow field, can realize the additional drag analysis under complex conditions. The downwash flow generated by the rotor affects the inlet front streamlines and additional drag, and the additional drag of the left and right inlets will also be different.
A stability-enhanced approach for aerodynamic heating computation in high-speed flows
Authors: Zhang Ye , Yu Hang , Ren Weijie , Li Hua 
Published: January 2024

Abstract
Near-space vehicles face severe aerothermal environments due to hypersonic speeds. Accurately predicting hypersonic aerodynamic heating is crucial for the design of spacecraft’s thermal protection systems, aerodynamic shapes, and propulsion systems. Numerical simulations have become an important tool for computing aerothermal environments under extreme conditions. However, there is a contradiction between the robustness and low dissipation characteristics of existing numerical methods for hypersonic flow fields. This paper proposes an effective dimension hybrid approach that enhances the robustness of AUSM-family schemes while maintaining their low dissipation characteristics. Numerical experiments demonstrate the proposed approach’s effectiveness and potential for practical engineering applications.
Numerical simulation analysis of anchor pullout under radial pressurization of anchor solid
Authors: Ren Chenfeng , Shi Xin 
Published: January 2024

Abstract
The rock structure of weak rock formation is loose with low strength, which is easy to deform. Due to insufficient elongation and bearing capacity, anchor anchorage system damage is frequent and serious. Given the above problems, this paper researches the radial increase in compressive stress anchoring mechanism and uses finite element software ABAQUS simulation algorithms to obtain different radial pressurization conditions under the deformation of the surrounding rock law and the anchor pulling the anchor and the surrounding rock displacement stress change rule. The results show that when applying the radial pressure of 1.5 MPa, the surrounding rock and the anchor stress reach their maximum value, and the displacement reaches its minimum value. Field testing and monitoring results show that radial pressurized anchors can effectively control the deformation of the roadway perimeter rock and improve the anchoring effect.
Small molecule conjugation reduces macrophage uptake and increases in vivo blood circulation of polystyrene nanoparticles
Authors: Yenurkar Devyani , Ruocco Maria , Pragya  , Liang Lily , Mukherjee Sudip 
Published: January 2024

Abstract
Nanomedicine often failed clinically to show therapeutic efficacy due to reduced particle circulation and enhanced capture by the reticuloendothelial system, including the liver. Developing novel immunomodulatory surface coating can prevent macrophage capture and increase the particle circulation of the nanomedicine, resulting in higher therapeutic efficiency. Herein, we demonstrate the development of immunomodulatory small molecule (RZA15) with triazole functionality using copper-catalyzed click chemistry to conjugate onto spherical polystyrene nanoparticles (NPs) using amide coupling reactions, achieving higher blood circulation and lesser macrophage uptake of the nanoconjugates (NCs). In this work, we evaluated the effectiveness of RZA15 coating for the enhanced circulation of polystyrene NPs of 100 nm size, which is commonly utilized for various drug delivery applications, and compared with poly(ethylene)glycol coatings. Several polystyrene NC formulations were analyzed in vitro in normal and macrophage cells for cell viability and cellular uptake studies. In vitro studies demonstrated lesser macrophage uptake of the NCs following RZA15 coating. Finally, in vivo, blood-circulation, pharmacokinetics, and biodistribution studies were performed in the C57BL/6J mouse model that endorsed the substantial role of RZA15 in reducing liver and spleen capture and results in extended circulation in blood. Coating immunomodulatory small molecules to nanoparticles can severely enhance the potential therapeutic effects of nanomedicine at lower doses in near future.
Facile preparation of self-healing hydrogels based on chitosan and PVA with the incorporation of curcumin-loaded micelles for wound dressings
Authors: Ding Peng , Ding Xiaoyue , Li Jingyu , Guo Wei , Okoro Oseweuba Valentine , Mirzaei Mahta , Sun Yanfang , Jiang Guohua , Shavandi Amin , Nie Lei 
Published: January 2024

Abstract
The increased demand for improved strategies for wound healing has, in recent years, motivated the development of multifunctional hydrogels with favorable bio-compatibility and antibacterial properties. To this regard, the current study presented the design of a novel self-healing composite hydrogel that could perform as wound dressing for the promotion of wound healing. The composite hydrogels were composed of polyvinyl alcohol (PVA), borax and chitosan functionalized with sialic acid (SA-CS) and curcumin loaded pluronic F127 micelles. The hydrogels were formed through the boronic ester bond formation between PVA, SA-CS and borax under physiological conditions and demonstrated adjustable mechanical properties, gelation kinetics and antibacterial properties. When incubating with NIH3T3 cells, the hydrogels also demonstrated good biocompatibility. These aspects offer a promising foundation for their prospective applications in developing clinical materials for wound healing.
A heparin-based nanogel system for redox and pH dual-responsive delivery of cisplatin
Authors: Thi Huong Nguyen , Ngoc Son Nguyen , Minh Thanh Vu , Van Quan Le , Bui Vu Thuy Duong , Nguyen Ngoc Hoi 
Published: January 2024

Abstract
Heparin recently has been discovered as a novel anti-cancer agent. The combinations of heparin with other agents was reported not only to reduce the undesired effects of free heparin and increase the cellular uptake of the delivered molecules, but also is the basis for the design and development of multi-stimulation response systems to improve their killing cancer cell efficiency at the target positions. This study aimed to design a redox and pH dual-responsive anticancer system based on heparin for cisplatin (CPT) therapy. Heparin was first cross-linked with Poloxamer 407 chains via disulfide bridges to form a redox-sensitive system Hep-P407. CPT was then encapsulated into the Hep-P407 system via the complex of Platin and carboxyl groups to form the redox/pH-responsive system CPT@Hep-P407. The obtained Hep-P407 systems were proved and characterized using specific techniques including 1H-NMR, zeta potential, Dynamic Light Scattering (DLS) and Fourier-transform infrared spectroscopy. The dual-responsive behavior to redox and pH of CPT@Hep-P407 was proved through DLS, zeta and in vitro release analysis meanwhile its cytotoxicity was investigated using Resazurin assay. The CPT@Hep-P407 system is expected to be a promising redox/pH-responsive anticancer system based on heparin for CPT therapy.
Not even 6 dB: Gaussian quantum illumination in thermal background
Authors: Volkoff T J 
Published: January 2024

Abstract
In analyses of target detection with Gaussian state transmitters in a thermal background, the thermal occupation is taken to depend on the target reflectivity in a way which simplifies the analysis of the symmetric quantum hypothesis testing problem. However, this assumption precludes comparison of target detection performance between an arbitrary transmitter and a vacuum state transmitter, i.e. ‘detection without illumination’, which is relevant in a bright thermal background because a target can be detected by its optical shadow or some other perturbation of the background. Using a target-agnostic thermal environment leads to the result that the oft-claimed 6 dB possible reduction in the quantum Chernoff exponent for a two-mode squeezed vacuum transmitter over a coherent state transmitter in high-occupation thermal background is an unachievable limiting value, only occurring in a limit in which the target detection problem is ill-posed. Further analyzing quantum illumination in a target-agnostic thermal environment shows that a weak single-mode squeezed transmitter performs worse than ‘no illumination’, which is explained by the noise-increasing property of reflected low-intensity squeezed light.
A comparative study on the spectral characteristics of nanosecond pulsed discharges in atmospheric He and a He+2.3%H2O mixture
Authors: CHEN 陈 Chuanjie 传杰 , PENG 彭 Dongyu 东宇 , LIU 刘 Botong 博通 , ZHANG 张 Tinglin 婷琳 , QIAN 钱 Muyang 沐杨 , ZHOU 周 Feng 锋 , WANG 王 Rugang 如刚 
Published: January 2024

Abstract
Nanosecond pulsed discharges at atmospheric pressure in a pin-to-pin electrode configuration are well reproducible in time and space, which is beneficial to the fundamentals and applications of low-temperature plasmas. In this experiment, the discharges in helium (He) and He with 2.3% water vapor (H2O) are driven by a series of 10 ns overvoltage pulses (~13 kV). Special attention is paid to the spectral characteristics obtained in the center of discharges by time-resolved optical emission spectroscopy. It is found that in helium, the emission of atomic and molecular helium during the afterglow is more intense than that in the active discharge, while in the He+2.3%H2O mixture, helium emission is only observed during the discharge pulse and the molecular helium emission disappears. In addition, the emissions of OH(A-X) and Hα present similar behavior that increases sharply during the falling edge of the voltage pulse as the electrons cool down rapidly. The gas temperature is set to remain low at 540 K by fitting the OH(A-X) band. A comparative study on the emission of radiative species (He, He2, OH and H) is performed between these two discharge cases to derive their main production mechanisms. In both cases, the dominant primary ion is He+ at the onset of discharges, but their He+ charge transfer processes are quite different. Based on these experimental data and a qualitative discussion on the discharge kinetics, with regard to the present discharge conditions, it is shown that the electron-assisted three-body recombination processes appear to be the significant sources of radiative OH and H species in high-density plasmas.