bluuebunny/crossref_metadata_2025_split huggingface dataset:
Global Attractivity of Solutions of Nonlinear Delay Difference Equations
Authors: Zhao Jing , Kong Xiangming , Wang Yu , Wang Chunxiao 
Published: May 2022

Abstract
The asymptotic behavior of solutions of delay difference equations is an important research topic in the field of qualitative analysis of difference equations and the key to grasp the evolution trend of various dynamic systems As we all know, most difference equations cannot find exact solutions Therefore, it is necessary to study the asymptotic behavior of the solution of the delay difference equation by indirect method. In this paper, improved the form of the equation in the existing reference, a single delay is changed into a multi delay equation, and the conditions required for the theorem to be established are weakened, so that the theorem can be applied to a wider range and still holds under the original conditions sufficient conditions for the asymptotic behavior of solutions independent of delay are obtained. The conclusion is proved by constructor method and counter proof method The relevant results in the existing literature are extended and improved to make the results more general. The results are applied to a kind of hematopoietic stem cell model. The asymptotic behavior of the solution is intuitively displayed in the form of chart to verify the conclusion.
A Low-temperature-coefficient Bandgap Voltage Reference for Sar Adc
Authors: Hu Daqian , Qiao Jiaqi , Yang Xiaoxu , Zhao Peng , Song Yang 
Published: May 2022

Abstract
The paper verifies a curvature-compensated bandgap reference circuit, which generates 1.2V bandgap voltage. Bandgap voltage comprises two parts: proportional to absolute temperature (PTAT) voltage from the bandgap core and complementary to absolute temperature (CTAT) voltage from the p-n junction. Simulation results across corners show that the temperature coefficient of this architecture can be less than 3ppm/°C by using the current compensation. Test results prove that the temperature coefficient achieves 5ppm/°C. The proposed bandgap consumes a power of 2mW and occupies an area of 0.15mm2 in the 0.18μm CMOS process.
New Feature for Evaluating Depth of Partial Decarburized Layer Based on Cepstrum Filter Banks
Authors: Yan Zhengxiang , Sun Guangmin , Liu Xiucheng , Li Yu , He Cunfu , Xing Zhixiang 
Published: May 2022

Abstract
Decarburization refers to a phenomenon that the content of carbon in metal is reduced, and this could be advantageous or detrimental depending on the usage scenario. In this paper, a new feature, called Barkhausen frequency scale cepstrum coefficients (BFCCs), which was based on the cepstrum was proposed to evaluate the depth of the decarburized layer. The Genetic algorithm was used to optimize the parameters of the BFCCs feature. In the experiment part, the regression precision was compared under BFCCs and MBN envelope features using multiple linear regression (MLR) and BP neural network (BP). The regression experiment result was measured by mean absolute error (MAE) and shows the good representative ability of BFCCs for the depth of the decarburized layer.
High Harmonic Generation from Oriented Asymmetric Molecules in the Presence of Static Electric Field
Authors: Silaev A A , Romanov A A , Vvedenskii N V 
Published: May 2022

Abstract
We investigate the high harmonic generation during the interaction of the femtosecond laser field with oriented asymmetric diatomic molecules in the presence of an external static electric field. Based on the numerical solution of the time-dependent Schrödinger equation for the model one-electron system, we calculate the high harmonic generation spectrum for a wide range of static-field strengths. The possibilities for visualizing low-frequency (terahertz and mid-infrared) radiation using time-delay measurements of even high harmonics intensities are discussed.
Simulation of High Harmonic Generation in Xenon Based on Time-Dependent Density-Functional Theory
Authors: Romanov A A , Silaev A A , Sarantseva T S , Frolov M V , Vvedenskii N V 
Published: May 2022

Abstract
The high harmonic generation (HHG) in xenon is studied by using the time-dependent density-functional theory for active 4th and 5th atomic shells. The HHG spectra are calculated for different intensities and carrier-envelope phases of a laser pulse. The HHG spectrum shows enhancement at the frequency region near 100 eV, where the HHG yield is by more than an order of magnitude higher than in the single-active electron approximation. The high accuracy of the obtained results is confirmed by comparing the calculated HHG spectra with experimental results.
Effects of Low-Level Laser Irradiation on Mammalian Cell Cultures: Comparative Experimental Studies with Different Types of Lasers at 1260-1270 nm
Authors: Khokhlova A , Zolotovskii I , Sokolovski S , Saenko Yu , Rafailov E , Stoliarov D , Pogodina E , Gilmutdinova A , Svetukhin V , Fotiadi A 
Published: May 2022

Abstract
The effects observed under near-infrared laser irradiation of mammalian cells have been demonstrated to depend to a large extent on the type of irradiation source. In our experiments, we have measured concentration of reactive oxygen species in cell cultures of different origin (rodent and human, cancerous and non-cancerous) exposed to the radiation of low-level lasers at 1265 nm. Surprisingly, the radiation effects of narrowband laser occur to be more pronounced compared with those provided by the lasers of broader linewidth. Also, we have found that the aggressive types of cancer require a more accurate selection of irradiation parameters and laser operation regime.
Research of Surface Plasmonic Resonance at The Silicon Nano-Silver Interface in the Information Recording Unit of the Diagnostic Complex Intest
Authors: Mogilnaya T Y , Vasiliev A M , Pagava L L , Botikov A G 
Published: May 2022

Abstract
The research presents a study of the fundamental possibility of realizing the contactless recording of information a complex for express diagnostics of an organism for the presence of infectious agents, which was called diagnostic complex “Intest”. The mathematical model of the interaction of the laser radiation with the surface of the crystal was built. Calculations were performed in the COMSOL 5.5 software package. The results of the optimization calculations showed at what crystal parameters it is possible to implement contactless recording
Phase Transitions in Quantum Complex Networks
Authors: Alodjants A.P. , Yu. Bazhenov A. , Nikitina M. M. 
Published: May 2022

Abstract
In this work we examine a superradiant (SR) and/or ferromagnetic (FM) - paramagnetic (PM) phase transitions problem in quantum materials which may be established by Barabási-Albert (BA) scale-free network that possesses power law degree distribution and specific degree correlations. We represent quantum material by means of Dicke-Ising model, that describes the interaction between a spin-1/2 (two-level) system and external classical (magnetic) and quantized (transverse) fields. To describe PM-FM and SR phase transitions we introduce three order parameters: the total (topologically) weighted as well as un-weighted z-spin components, and the normalized transverse field amplitude, which correspond to the spontaneous magnetization in z- and x-directions, respectively. We have shown that SR state occurs as a result of the interaction between the ordering of the spins in the z− and x-directions and depends on assortativity or disassortativity of the network medium. We have shown that non-trivial topological behavior associated with large fluctuations of network parameters inherent to assortative networks reduces of PM-FM phase transition temperature, while dissasortative networks exhibit high temperature phase transitions. Our findings demonstrate new opportunities to design of quantum materials which may be implemented for current quantum technologies at relatively high temperatures.
Process optimization of WEDM D2 steel based on orthogonal test and response surface method
Authors: Zhou Changwu , Zhao Liangliang 
Published: May 2022

Abstract
D2 steel can be used to manufacture cold working molds with large cross sections, complex shapes, high impact forces and high wear resistance requirements. Cutting speed is an important process index of WEDM. In order to study the influence of WEDM process parameters on the cutting speed of D2 die steel and explore the process parameters at the maximum cutting speed, In this experiment, the electrical parameters pulse width, pulse interval and servo voltage were selected as test factors, and the cutting speed process indexes were analyzed and optimized by orthogonal test and response surface analysis method. Experimental results show that: the influence of main electrical parameters on cutting speed is consistent; the effects of pulse width, pulse interval and servo voltage on cutting speed decrease successively; the optimum process parameters obtained after optimization are consistent, pulse width 8μs, pulse interval 10μs, servo voltage 38V.
Simulation analysis and experimental study on impact fall test of forklift overhead guard
Authors: Peng Xuefeng , Zhao Jianbo , Liu Yetao , Dai Zongmiao 
Published: May 2022

Abstract
This paper introduces the safety performance test standards and requirements of forklift overhead guard. According to the requirements of the impact fall test in the standard, an explicit dynamic calculation model of the impact of overhead guard under load was established based on the LS-DYNA display central difference method, and the field impact test of the overhead guard designed in this paper was carried out. The results show that the hourglass energy of the impact falling simulation test is less than 5% of the total energy, which conforms to the law of energy conservation, so the simulation model can be considered correct. At the same time, the simulation analysis results are consistent with the field impact falling test results. The connection position of riser and position of base bolting appear failure fracture, and the structural strengthening suggestions are given.
Study on the improvement of performance of proton exchange membrane Fuel Cell by Magnetic effect
Authors: Lang Xianji , Wu Zhicong , Li Rurun , Wu Maoliang 
Published: May 2022

Abstract
Oxygen and water are the main components of proton reaction, and the gradient magnetic field can affect their physical and chemical properties. The performance of PEMFC with gradient magnetic field on anode side was studied. On this basis, the performance of the battery under different battery temperature and hydrogen flow rate was tested. The experimental results show that the electric efficiency of PEMFC can be improved, the degradation of battery performance can be inhibited, and the service life of PEMFC can be extended under the same environmental variables. The experimental results can provide some reference value for improving PEMFC performance.
DEKF-based SOC estimation study for lithium batteries
Authors: Chen Yuhang , Xiong Hongjun , Guo Yi 
Published: May 2022

Abstract
In view of the low estimation accuracy of single extended Kalman filter algorithm (EKF) and the influence of the initial value of state of charge (SOC), the double extended Kalman filter algorithm (DEKF) is used for online estimation of battery model parameters and SOC based on the establishment of second-order RC equivalent circuit model. A 36V 32A·h lithium iron phosphate battery pack is used as the research object, and experiments are designed for the actual battery conditions. The experimental results show that the DEKF algorithm has better convergence and adaptability under different conditions than a single EKF algorithm with inaccurate initial values of SOC, and the error is controlled within 5%, which proves the feasibility and effectiveness of the algorithm.
Study on Processing Technology of Aluminium-based silicon carbide material for Shafting Installation
Authors: Li Lin , Li Hao , Zhang Bin , Wang Tianming , Yu Junyu , Mao Lei , Wei Jialin , Huang Ning , Chen Lei 
Published: May 2022

Abstract
Aluminium-based silicon carbide (SiCp/Al) composites are widely used in spacecraft structures due to their excellent properties. Aiming at the high-precision machining requirements of thin-walled shell components installed in SiCp/Al shafting in aerospace field. The structural characteristics of thin-walled shell components are analysed. Combined with material characteristics and mechanical properties, a single clamping vertical horizontal conversion machining scheme is formulated. Match the right machine tools and PCD tools. Then the metal cutting process is simulated by AdvantEdge, and the tool structure parameters and cutting process parameters are optimized. Finally, the process route suitable for installing housing components is formulated, with dimension accuracy of H6, cylindricity of 0.003mm and coaxiality of 0.006mm, which solves the difficult problem of machining high-precision shaft mounting housing.
Ride comfort analysis of electric vehicle using hub motor as dynamic absorber
Authors: Zhao Pingping , Fan Zhimin 
Published: May 2022

Abstract
To resolve the problems of adding unsprung mass and worsening ride comfort of hub motor drive electric vehicles, a new drive system with hub motor as dynamic absorber is studied and proposed. The mathematical models of the new hub motor drive system and the centralized motor drive system are established, and their ride comfort is compared and analyzed. The impact of dynamic absorber parameters on ride comfort of the new hub motor drive system is analyzed, and the parameter sensitivity is calculated. The results show that the body acceleration, suspension dynamic deflection, wheel dynamic load of the new hub motor drive system are better than those of the centralized motor drive system, and the dynamic absorber parameters have a great effect on the electric vehicle performance.
Test and Measurement Data Analysis of Fuel Consumption Measurement and Control System of Floating Ball Engine
Authors: Xu Dong 
Published: May 2022

Abstract
Fuel consumption is an important index to evaluate the fuel economy of automobile engine, and it is one of the important measurement parameters in engine test research. This paper uses the engine eddy current test bench to carry out the repeatability verification test, measurement accuracy and accuracy verification test, and engine bench test of the designed and developed floating ball fuel consumption meter. The data obtained from the test are analyzed to verify the floating ball fuel consumption. performance indicators of the instrument.
Evaluation of measurement uncertainty of the orthogonal deviation angle of the target mirror based on AMCM
Authors: Huang Qiangxian , Guo Xiaoqian , Li Hongli , Zhang Zuyang , Chen Zhiwen 
Published: May 2022

Abstract
The combination of the three-dimensional (3D) target mirror and laser interferometers can achieve 3D precision measurement, and the orthogonality between the target mirror has a significant impact on the accuracy of the measurement system. In order to ensure the accuracy of the measurement system, it is necessary to measure the orthogonal deviation angle of the 3D target mirror and evaluate the uncertainty to verify whether the machining accuracy of the target mirror meets the requirements. In this paper, to test the orthogonality of the X-Y reflection planes of the 3D target mirror, which is glued by three plane mirrors, the evaluation methods of measurement uncertainty of the orthogonal deviation angle θxy
are studied. The measurement model of uncertainty evaluation is built based on the quantitative characteristics analysis method, and the evaluation results of measurement uncertainty are obtained based on the adaptive Monte Carlo method (AMCM). Moreover, the evaluation results are compared with those evaluation results obtained respectively based on the traditional assessment method of measurement uncertainty (called as GUM method) and Monte Carlo method (MCM). Through the comparison of the evaluation results, it can be concluded that the best estimate of the orthogonal deviation angle θxy
is about -3.09”, the corresponding standard uncertainty is about 0.69”, and the machining accuracy of the X-Y reflection planes of the target mirror meets the requirements. Moreover, the AMCM evaluation results is reliable, and AMCM is more convenient and efficient than GUM and MCM methods. The research work provides valuable reference for solving practical measurement evaluation problems.
Coordinated Control of Path Following and Yaw Stability for Distributed Drive Autonomous Vehicle
Authors: Liu Zhikun , Yin Dejun , Guo Ruiming 
Published: May 2022

Abstract
This paper researches a coordinated control approach of path following and yaw motion stability for distributed drive autonomous electric vehicle. In the upper-level controller, a linear time-varying model predictive control algorithm is used to obtain the front wheel steering angle to guarantee the vehicle to drive along the planned path. Meanwhile, the sliding mode control theory is aimed to calculate the external yaw moment to ensure the vehicle yaw stability. In the low-level controller, this research proposes the particle swarm optimization algorithm to execute the torque distribution control. The Matlab/Simulink simulation results indicate that the coordinated control strategy can not only effectively improve the accuracy of path following, but also guarantee yaw motion stability of the autonomous vehicles.
Beam dynamics challenges in linear colliders based on laser-plasma accelerators
Authors: Schroeder C.B. , Benedetti C. , Bulanov S.S. , Terzani D. , Esarey E. , Geddes C.G.R. 
Published: May 2022

Abstract
In this paper we discuss design considerations and beam
dynamics challenges associated with laser-driven plasma-based
accelerators as applied to multi-TeV-scale linear colliders. Plasma
accelerators provide ultra-high gradients and ultra-short bunches,
offering the potential for compact linacs and reduced power
requirements. We show that stable, efficient acceleration with beam
quality preservation is possible in the nonlinear bubble regime of
laser-plasma accelerators using beam shaping. Ion motion, naturally
occuring for dense beams (i.e., low emittance and high energy)
severely damps transverse beam instabilities. Coulomb scattering by
the background ions is considered and it is shown that the strong
focusing in the plasma strongly suppresses scattering-induced
emittance growth. Betatron radiation emission from the transverse
motion of the beam in the plasma will result in beam power loss and
energy spread growth; however for sub-100 nm emittances, the beam
power loss and energy spread growth will be sub-percent for
multi-TeV-class plasma linacs.
Positron sources: from conventional to advanced accelerator concepts-based colliders
Authors: Chaikovska I. , Chehab R. , Kubytskyi V. , Ogur S. , Ushakov A. , Variola A. , Sievers P. , Musumeci P. , Bandiera L. , Enomoto Y. , Hogan M.J. , Martyshkin P. 
Published: May 2022

Abstract
Positron sources are the key elements for the future and
current lepton collider projects such as ILC, CLIC, SuperKEKB,
FCC-ee, Muon Collider/LEMMA, etc., introducing challenging critical
requirements for high intensity and low emittance beams in order to
achieve high luminosity. In fact, due to their large production
emittance and constraints given by the target thermal load, the main
collider parameters such as the peak and average current, the
emittances, the damping time, the repetition frequency and
consequently the luminosity are determined by the positron beam
characteristics. In this paper, the conventional positron sources
and their main properties are explored for giving an indication to
the challenges that apply during the design of the advanced
accelerator concepts. The photon-driven positron sources as the
novel approach proposed, primarily for the future linear colliders,
are described highlighting their variety and problematic.
On possibility of low-emittance high-energy muon source based on plasma wakefield acceleration
Authors: Shiltsev V. 
Published: May 2022

Abstract
Plasma wakefield acceleration (PWA) channels are
characterized by very high accelerating gradients and very strong
focusing fields. We propose to employ these properties for effective
production of low emittance high energy muon beams, consider muon
beam dynamics in the PWFA cell and analyze various options and
potential of the PWA-based muon sources.
Improving flood impact estimations
Authors: Sieg Tobias , Thieken Annegret H 
Published: May 2022

Abstract
A reliable estimation of flood impacts enables meaningful flood risk management and rapid assessments of flood impacts shortly after a flood. The flood in 2021 in Central Europe and the analysis of its impacts revealed that these estimations are still inadequate. Therefore, we investigate the influence of different data sets and methods aiming to improve flood impact estimates. We estimated economic flood impacts to private households and companies for a flood event in 2013 in Germany using (a) two different flood maps, (b) two approaches to map exposed objects based on OpenStreetMap and the Basic European Asset Map, (c) two different approaches to estimate asset values, and (d) tree-based models and Stage-Damage-Functions to describe the vulnerability. At the macro scale, water masks lead to reasonable impact estimations. At the micro and meso-scale, the identification of affected objects by means of water masks is insufficient leading to unreliable estimations. The choice of exposure data sets is most influential on the estimations. We find that reliable impact estimations are feasible with reported numbers of flood-affected objects from the municipalities. We conclude that more effort should be put in the investigation of different exposure data sets and the estimation of asset values. Furthermore, we recommend the establishment of a reporting system in the municipalities for a fast identification of flood-affected objects shortly after an event.
Effect of honeycomb structure parameters on the mechanical properties of ZTAp/HCCI composites
Authors: Zhang Jiayi , Sui Yudong , Jiang Yehua , Zhou Mojin 
Published: May 2022

Abstract
Zirconia toughened alumina particles (ZTAp)/high chromium cast iron (HCCI) matrix honeycomb composites were successfully prepared by a non-pressure infiltration casting process. This paper systematically investigates the effect of pore size (6 mm, 8 mm, 10 mm, 12 mm) on the compression resistance of honeycomb structure under the same wall thickness condition. Through the simulation software Ansys Workbench and compression performance test, it was found that the compression performance tends to increase gradually with the increase of the honeycomb pore size, and the optimal compression resistance is reached when the pore size is 12 mm. This optimum performance is attributed to the fact that the reinforcement mechanism of the composite depends not only on the load sharing of the reinforcing particles, but also on the strength of the matrix.