bluuebunny/crossref_metadata_2025_split huggingface dataset:
Linear superposition for a sine-Gordon equation with some types of novel nonlocalities
Authors: Zhang Zong-Ao , Lou S Y 
Published: January 2023

Abstract
Some nonlocal sine-Gordon (SG) systems with some different types of nonlocalities are derived from the usual local SG equation by means of the consistent correlated bang approach. The nonlocal SG systems are Lax integrable. Two types of N-soliton solutions and six types of periodic solutions of the usual SG equation are presented. Some types of solutions of the nonlocal integrable SG systems are obtained by using the symmetric-antisymmetric separation approach. Usually, the linear superposition principle can not hold as a general principle in the presence of nonlinearity. In this paper, it is shown that for a special type of nonlocal SG equations, a linear superposition theorem can be survived for some special types of exact solutions.
Numerical comparison and design of magnets arrays for particle separating, based on magnetophoresis
Authors: Baghdadi Shahriar , Rad Malekshahi Mazdak 
Published: January 2023

Abstract
In this paper, based on magnetophoresis, the effects of magnets arrays changings on particle tracing are analyzed. The changing of magnets arrays are included the changings of magnets dimensions and also the changing of the space between them. Magnets arrays with different styles, have generated dissimilar magnetic field. Hence, in some cases the magnetic force is stronger. In these cases, the manipulation on particles are done in less time. The importance of this problem is related to increase the throughput of the microsystem.To conquer to this challenge analytical methods (mathematical piecewise method) in 2D platform are used. The path of particles in microchannel are predicted. Then, the changings in magnets arrays (gap-dimension) are inserted. Lastly, the comparison of distance, velocity, and time to find out the proper style are done.The results shown that for the specific surface area (volume in 3D platform), there is a particular magnets dimension with a particular spacing between them (gap-dimension). Which has performed a maximum effects on microparticles. The simulations for five surface area S1 = 40000 μm2, S2 = 62500 μm2, S3 = 90000 μm2, S4 = 122500 μm2, and S5 = 160000 μm2 are proceed. The results are describes as the couple of gap-dimension which the gap is the space between magnets and the dimension is the intersection of the magnets and the channel. The results of (gap-dimension) for specific surface area are listed respectively as: (500 μm−107 μm), (575 μm−127 μm), (650 μm–146 μm), (725 μm−164 μm), and (800 μm − 183 μm). The efficiency and throughput in this points are 100 percent for micro device. Because all of the particle are captured in the less time.Using the proper gap-dimension for the magnets arrays is led to maximize the efficiency and throughput of the microsystem.
Performance Study of Plant Phenol Modified Tapioca Starch in Drilling Fluid
Authors: Song Bingqian , Mo Cheng , Lei Haoran , Zhang Jie 
Published: February 2023

Abstract
As a natural and environmentally friendly product with wide sources, low cost, easy degradation and good environmental adaptability, starch has a wide range of applications in the petroleum industry, but improving its temperature resistance is an important research direction for the future. In this paper, by modifying cassava starch with plant phenols, different types and concentrations of plant phenols were preferably selected with plastic viscosity PV (mPa-s) and filtration loss FL (mL) as the main evaluation indexes, and the results showed that the plant phenol modified cassava starch has excellent temperature resistance and filtration loss reduction performance. In addition, the results of clay ball experiment and bentonite particle size distribution measurement experiment indicated that the hydration dispersion and hydration swelling inhibition performance of plant phenol-cassava starch clay were good. Plant phenol-cassava starch is expected to be widely used as a safe and environmentally friendly drilling fluid treatment agent with excellent performance.
Modeling Method of Engine Zero-dimensional Combustion Model Based on PSO Algorithm Optimization
Authors: Hu Deng , Wang Hechun , Wang Binbin , Duan Baoyin , Wang Yinyan , Yang Chuanlei 
Published: February 2023

Abstract
To improve the low accuracy of the zero-dimensional combustion model established by BP-NN, a particle swarm-neural network (PSO-NN) algorithm was proposed. The PSO optimize weights and thresholds of NN, and the operating and combustion parameters are constructed, and then compared with NN algorithm. The results show that comparing with NN algorithm, the zero-dimensional combustion model constructed by PSO-NN algorithm has higher prediction accuracy, and the mean square error of the main combustion period m is 0.0034, which is 78.21% lower than that before optimization. The particle swarm algorithm has quicker convergence and stronger versatility, which is suitable for the study of diesel engine 0-D model.
Structural Improvement on Cylinder of Horizontal Ultrafine Stirring Mill
Authors: Wang Lin , Zheng Jin , Huo Chaoxia , Li Guojun 
Published: February 2023

Abstract
The stirred media mill with pin-type rotor structure is one of the important equipment for manufacturing superfine powder. Its structure design affects the grinding and refinement of superhard and superfine powder. Computational fluid dynamics (CFD) method is used to carry out numerical simulation of single-phase flow field, improve the cylinder structure, add static pins for it. The influence of circular, triangular and rectangular static pin structures on the flow field and grinding characteristics of stirred mill was analyzed. The results show that the cylinder with static pins can better hinder the flow inside the grinding machine, improve the utilization rate of energy inside the stirred mill, and increase the proportion of the region with large velocity gradient in the grinding chamber. Compared with the three design schemes, it can be found that the larger area and non-streamlined rectangular static pin can improve the grinding strength of the stirred mill.
Flux Reconstruction Schemes for Fokker-Planck Equations with Drift-Admitting Jumps
Authors: Lin Yu , Chen Yaming , Deng Xiaogang 
Published: February 2023

Abstract
We develop in this work flux reconstruction (FR) schemes for one-dimensional Fokker-Planck equations with drift-admitting jumps, which have applications in describing the propagators of piecewise-smooth stochastic differential equations. Since the propagators are nonsmooth at the jumps of the drift, difficulties arise in finding the corresponding solutions not only theoretically but also numerically. To be more specific, the main difficulties lie in the fact that two matching conditions have to be imposed simultaneously at each jump, i.e., where the the propagator and the probability current are continuous. In this work, we show that the FR method is an ideal choice for designing numerical schemes for solving this problem. The corresponding FR schemes are given in details. Some benchmark examples are also employed to validate the proposed schemes numerically.
A Study on X-ray Shielding Efficiency of New 3D Alloy
Authors: Liu Minqiang , Zhu Xiaofeng , Zeng Chao , Xu Xianguo 
Published: February 2023

Abstract
In this paper, MCNP was used to simulate the shielding efficiency of different shielding materials and the new 3D alloy (an alloy of Ta and W) with different surface densities for the low energy X-ray spectrum (<200keV), and the transmission efficiency of the new 3D alloy with different single energy X-ray spectrum. The simulation results show that the new 3D alloy is a shielding material with high X-ray shielding efficiency, which is approximate to W. The higher the surface density is, the greater the shielding efficiency of the new 3D alloy is. With the increase of energy, the X-ray transmissivity increases. At about 69keV, the transmissivity suddenly decreases to the minimum, and then increases with the increase of energy. And the X-ray transmission verification experiment is designed, and the experimental results are in good agreement with the simulation results.
Experimental Study on Supporting Capacity of Hollow Reinforced Concrete Filled Steel Tube
Authors: Liu Yanan 
Published: February 2023

Abstract
Hollow reinforced concrete supported specimens with different slenderness ratio and steel content were designed and the load-displacement test was carried out. The load-displacement curve of hollow reinforced concrete filled steel tube supported showed no obvious decreasing section, and the curve remained almost unchanged or slightly decreased after reaching the ultimate load, with good ductility. The bearing capacity of the support increases with the decrease of hollow ratio. The heart rate decreases from 0.33 to 0.19, and the bearing capacity increases 2.037~2.28 times. The bearing capacity calculation formula of hollow reinforced concrete filled steel tube is derived, and the improved compressive strength calculation formula of hollow reinforced concrete filled steel tube is obtained by considering the stirrup action of the member and combining with the relevant test data. At the same time, using the stability coefficient formula obtained from the regression analysis, the stability bearing capacity calculation formula of hollow concrete filled steel tube axial compression medium long column is obtained.
An Easy and Low-cost Fabrication of AgNPs with High Performance in SERS
Authors: Deng Junpeng , Wang Guofu , Qin Zhenle , Wang Mengqi , Sun Yukun , Jia Xiaobo , Zhou Jin , Liu Yansheng 
Published: February 2023

Abstract
We study a cost effective and easy way to fabricate stable, uniform and large area surface-enhanced Raman scattering (SERS) substrates. The AgNPs with varying diameters have been fabricated through a thermally treating method on SiO2/Si substrate which present a high sensitivity, good uniformity and good stability. By using rhodamine 6G (R6G) molecule as analyte, the maximized detection limit is as low as 10−8 M. The deviation of SERS intensity by using proposed AgNPs SERS substrate is less than 15% which indicates its good uniformity. This work provides an efficiently way of fabricating industry SERS substrates which are good candidate in practical application in medicine, food safety and biotechnology.
Constitutive Model of TNM Alloy Using Arrhenius-Type Model and Artificial Neural Network Model
Authors: Zhou Yaoqing , Yang Gang , He Xiaomao , Zhou LeYu , Zhai Yuewen 
Published: February 2023

Abstract
TNM alloys are frequently employed in automotive and aeronautical applications. Hot compression experiments on a Gleeble-3800 testing apparatus were conducted at a range of temperatures (1150°C–1250°C) and strain rates (0.001s-1 - 1s-1) to investigate the high temperature deformation behavior of TNM alloys. The complex deformation mechanisms of TNM alloys at various temperatures and strain rates were studied using the experimentally discovered true stress-true strain curves. The constitutive relationships between deformation parameters and flow stresses were constructed using two methods, Arrhenius model and neural network model respectively. The results demonstrated that the correlation coefficient R and root mean square error (RSME) achieved by BPNN are, respectively, 0.9982 and 4.7784, and are notably better than those anticipated by the Arrhenius-type model. In terms of the distribution of relative errors, the BPNN findings are similarly more concentrated, and the bulk of them fall inside the 10% range. Therefore, the BP neural network is a useful tool for forecasting the elevated temperature flow behavior of TNM alloys.
Tire Noise Prediction through 2D Tread Pattern Design
Authors: Zhu Bin , Wang You-Shan 
Published: February 2023

Abstract
Noise emitted by rolling tires has a strong contribution on the traffic noise in urban areas and has a significant impact on the ride comfort for passengers, which is mainly caused by the interaction between tires and pavement. The force generated in the contact patch has an important contribution to tire noise. For a patterned tire rolling on a flat surface, the geometry and position of tread pattern blocks are one of the main influencing factors of discontinuous force. In this paper, it is assumed that the impact force produced by each tread pattern element and pavement can be expressed as a Dirac delta function. For more realistic modelling of noise generated by impact force, a weighting function is considered, which is distributed along the tread transverse direction. The experiment is performed on a drum experimental machine in a semi-anechoic room. The predicted results are compared with experimental measurement, the maximum error is 3.85 dB between the predicted sound pressure level and measured. The prediction results have sufficient accuracy on the trend of A-weighted sound pressure level. The prediction method in this paper can be used to accelerate the development process of low tire tread pattern in the future.
Forced Vibration Analysis of Bimodular Microbeams Based on the Modified Couple Stress Theory
Authors: Huang Chunlin , Peng Jianshe , Fan Lin , Liu Yang 
Published: February 2023

Abstract
The forced vibration model of bimodular microbeams is studied in this paper based on the modified couple stress theory. The effects of the bimodular characteristic and the size effect are considered in this model. The forced vibration governing equation, boundary conditions, and initial conditions are obtained by Hamilton’s principle. The influence of the bimodular ratio and the material length scale parameters on the time history response are investigated based on the analytical method. Results show that the larger the two parameters, the higher the frequency and the smaller amplitude.
Design and Development of Structural Parameter Identification Software for Nonlinear Vibration Isolators
Authors: Meng Chen , Xu Shiheng , Zhang Xiaoxu 
Published: February 2023

Abstract
This paper developed an object-oriented software to facilitate parameter calibration of the quasi-zero stiffness (QZS) vibration isolator for engineering applications. Considering its advantages of convenient programming and high noise resistance, we employ the harmonic balance method to construct the identification core algorithm. The developed software consists of data pre-processing, parameter identification, and post-processing modules. The data pre-processing module imports and classifies all the required data. Then, the parameter identification module conducts preliminary nonlinearity analysis so that nonlinear structural parameter identification can be successfully carried out. After parameter identification, the data post-processing module displays and stores the identified results. The performance of the software is tested by a numerical example of a two-degree-of-freedom QZS vibration isolator, proving the software can give accurate identification results within a few user-friendly graphical interfaces. Based on this software, we hope that the application and promotion of nonlinear system parameter identification become more convenient.
Study on the Constitutive Model and the Identification of Parameters of Granite Based on the Crack Closure Ratio
Authors: Zhang Guoyan , Qian Li , Zhang Jianhai , Wang Zhenning , He Jianhua 
Published: February 2023

Abstract
A large number of cracks exist inside brittle rocks, and the evolution and expansion of cracks inside rocks have adverse effects on the deformation and strength of rocks, leading to the reduction of mechanical properties of rocks and endangering the stability and safety of rock engineering. Taking the granite samples taken from underground plant of Yebatan hydropower station as the research object, conventional triaxial compression tests were carried out. The characteristics of crack evolution and expansion in granite is investigated, and the parameters of granite are analysed and identified for different mechanical states by using stress-crack strain evolution constitutive model. The stress-crack strain evolution constitutive model was embedded into FLAC3D for triaxial loading tests through secondary development. The results show that the stress-crack strain evolution constitutive model is reasonable and accurate enough to be applied in numerical simulation of underground power-house of Yebatan hydropower station.
Extrapolation of Load Histories Based on MCMC and POT
Authors: Zhong Zhihong , Li Kaibiao , Chen Chunyan 
Published: February 2023

Abstract
Load spectrum is essential for fatigue life analysis, strength and durability tests of vehicles and components, but the whole life load cannot be acquired by measurement. To extrapolate a short measured load history to a longer time period, a method was presented in this paper based on Markov Chain Monte Carlo (MCMC) in conjunction with the Peak Over Threshold (POT) method. Firstly, we extend the load by MCMC to increase the randomness of load and the number of extreme samples; then fit a generalized Pareto distribution (GPD) using POT method to extrapolate the extreme values. Methods of threshold selection in POT were also presented briefly in this paper. Rain flow curves of the original, the MCMC extended and the extended extrapolated signal comparison verified the effectiveness of this method.
PTZ Active Vision Method Based On BEBLID
Authors: Xu Zibo , Pan Dongyu 
Published: February 2023

Abstract
The traditional pan-tilt-zoom (PTZ) camera relies on manual operation in control, and it requires a large number of samples for training in the algorithm to achieve higher target recognition accuracy. Therefore, we introduce the Boosted Efficient Binary Local Image Descriptor (BEBLID) propose a pedestrian detection and tracking method applied to the PTZ. By extracting image feature points and feature descriptions, we use Support Vector Machines (SVM) to train fewer samples to complete pedestrian detection. Then we input it into kernel correlation filters (KCF) for subsequent tracking, and use its high frame rate to reduce the feedback steps of the PTZ position loop, which reduces the system running time, and then we control the target image to be always locked in the center of the image. Finally, the experiment is carried out, and the whole system can run normally. Under 700 test samples, the detection effect of this algorithm is the highest, reaching 93.00 %, which is 14.57 % and 3.57 % higher than that of Scale-invariant feature transform (SIFT) and Oriented Brief (ORB).
Optimal Design Method for Sub-array Beamforming Based on an Improved Ant Lion Algorithm
Authors: Li Zirui , Ouyang Jiali 
Published: February 2023

Abstract
The sub-array division plays an important role in reducing the system complexity, computing complexity and hardware cost of large aperture phased array radar. The traditional sub-array partition method does not consider the suppression of side lobe and interference as well as the weight optimization of sub-array. In this paper, a sub-array-level pattern optimization design method based on improved ant lion algorithm is proposed. Firstly, the anti-collision factor and elimination mechanism are introduced into ant lion algorithm. Then, by constraining the total number of elements and sub-array, the appropriate number of elements and sub-array weight of each subarray are solved, and then the height of peak sidelobe and the depth of null are optimized. The simulation results show that this method has better effects in sub-array optimization, sidelobe reduction and zero depth reduction in comparision with other algrithems.
Flexible soft Pneumatic Bionic Hand Based on Multi-Jointed Structure
Authors: Hao Tianze , Xiao Huaping , Liu Shuhai 
Published: February 2023

Abstract
Compared with rigid robotic hands, soft hands can provide better safety and adaptability. In the process of gradual development, the multi-jointed structure that mimics the shape of the human hand has shown significant progress in realizing its personification. In this article, we propose a multi-jointed pneumatic soft hand, which is composed of multi-jointed soft fingers, thumb, thenar and 3D printed palm. It can express letters through sign language gestures and can grasp objects with different sizes, shapes, weights and surface textures. We tested the bending ability of the actuators under different air pressures to characterize the performance of actuators made of silicone rubber. Based on the strain energy density function of silicone rubber, the Yeoh model is used to calculate the relationship between the air pressure required and the bending angle. In addition, a dedicated pneumatic control system is designed and manufactured to enable the soft hand to automatically perform tasks set by the specific program. This new multi-jointed pneumatic soft hand has flexible bionic fingers, and has the advantages of fast response speed, low cost, easy manufacturing, assembly and replacement.
Application of Rail-Type Welding Robot in Automatic Welding of Pipeline
Authors: Zhou Lun , Guo Yanbao , Yin Tie , Wang Xinsheng , Ma Zhifeng , Wang Hehe 
Published: February 2023

Abstract
In order to realize the automatic welding of oil and gas pipelines, a kind of rail-type welding robot was designed, which includes a mechanical structure that can walk around the circumference of the pipeline steadily and a control system with the function of welding seam tracking. According to the characteristics of field construction, the robot adopted a modular design method, which primarily consists of a walking mechanism, quick clamping mechanism, welding torch adjusting mechanism, welding torch, wire feeder mechanism, guide rail, and the composition of the control system was introduced besides. The weld center identification and weld tracking were both automatically accomplished by the laser vision tracking system. Through the welding test, it has been demonstrated that the rail-type welding robot can meet the requirements of automatic welding of pipelines.
High-resolution electronic and vibrational spectroscopy of small-to-medium sized molecules with ab initio potential energy surface
Authors: Ray Soumyadip , Koner Debasish , Mondal Padmabati 
Published: January 2023

Abstract
Electronic and vibrational spectroscopic studies of molecules are of crucial importance to characterizing a molecule and detecting the molecular species in different environments. In this review article, we summarized some important theoretical methods to calculate high-resolution electronic spectra and ro-vibrational states for small molecular systems with the inclusion of vibronic and ro-vibrational couplings, respectively. We have also reviewed a number of theoretical studies exploring some interesting organic chromophores like indole, isoalloxazine, transition metal trifluoride CoF3 and NiF3, and molecular ions like protonated rare gases and azido ions. These studies involve the calculation of spectroscopic features based on analytical potential energy surfaces (PESs) constructed using high-level ab initio energies. The topology of the PESs has been explored for these selected systems. The vibronic spectra and ro-vibrational states calculated using various theoretical methods and their comparison to available experimental results are reported in this review.