bluuebunny/crossref_metadata_2025_split huggingface dataset:
Tunable electronic properties of two-dimensional C3N/antimonene van der Waals heterostructure
Authors: Zou Hui , Pan Jiangling , Ouyang Fangping 
Published: July 2022

Abstract
In this work, we construct a C3N/antimonene van der Waals heterostructure to investigate its structural and electronic properties using first-principles calculations. The C3N/antimonene heterostructure exhibits an indirect band gap of 0.143 eV with a type-II band alignment. Electrons transferring from C3N to antimonene layer introduce a build-in electric field which can be used to prevent recombination of the photoexited electron–hole pairs. By applying vertical strain, band gap value of the heterostructure can be tuned in a range from 0 to 0.318 eV. A type-II to type-I band alignment transition occurs at a interlayer distance of sim3.2 Å, and the heterostructure experiences a semiconductor to metal transition with a interlayer distance of sim3.7 Å. Moreover, structural and electronic properties of C3N/antimonene heterostructure show modulation under in-plane biaxial strain. A semiconductor to metal transition takes place when strain reaches −2.0%. Moreover, with the increase of compressive strain, buckling degree of the heterostructure increases, and band gap of the heterostructure increases to 0.645 eV at strain of −5.0%. In addition, band gap value of the heterostructure varies almost linearly with vertical electric field of −0.2–0.2 V Å−1, and type-II band alignment can be maintained in this range. Thus, these results indicate that C3N/antimonene heterostructure has great potential in the field of multifunctional optoelectronic devices.
Even-odd chain dependent spin valve effect on a zigzag biphenylene nanoribbon junction
Authors: Zhang Lin , Tong Peiqing 
Published: July 2022

Abstract
The even–odd chain dependent spin valve effect was forecasted in some honeycomb graphene-like materials with zigzag edges. In this study, we confirm that the even–odd chain related spin valve phenomenon also exists in a zigzag biphenylene nanoribbon (ZBN) junction. By modeling the ZBN junction with different even and odd chains subjected to a local Rashba spin–orbit coupling (SOC) and a homogeneous magnetic field, we calculate the spin dependent conductance spectra between the source and the drain electrodes and find that the spin up (down) electron can be inhibited (allowed) to flow through the even (odd)-chain ZBN junction, which can be explained by the combined effect between the pseudo-parity conservation and magnetic field-tunable energy gap in the energy band theory. The switch on and off states of spin valve can be modulated by the most system parameters such as the Fermi energy, magnetic flux, and Rashba SOC. Furthermore, the ZBN can act as a gate-tunable spin generator and spin filter, in which we can get 100% polarized spin up (down) electrons with (no) spin-flipping from the even-chain ZBN junction, and only produce 27% polarized spin-converting electrons from the odd-chain ZBN junction. Our findings might be useful in designing future multi-parameter controllable spin valves by using the new carbon allotropes.
Sintering of alumina nanoparticles: comparison of interatomic potentials, molecular dynamics simulations, and data analysis
Authors: Roy S , Prakash A , Sandfeld S 
Published: July 2022

Abstract
Sintering of alumina nanoparticles is of interest both from the view of fundamental research as well as for industrial applications. Atomistic simulations are tailor-made for understanding and predicting the time- and temperature-dependent sintering behaviour. However, the quality and predictability of such analysis is strongly dependent on the performance of the underlying interatomic potentials. In this work, we investigate and benchmark four empirical interatomic potentials and discuss the resulting properties and drawbacks based on experimental and density functional theory data from the literature. The potentials, which have different origins and formulations, are then used in molecular dynamics (MD) simulations to perform a systematic study of the sintering process. To analyse the results, we develop a number of tailored data analysis approaches that are able to characterise and quantify the sintering process. Subsequently, the disparities in the sintering behaviour predicted by the potentials are critically discussed. Finally, we conclude by providing explanations for the differences in performance of the potentials, together with recommendations for MD sintering simulations of alumina.
Global threshold dynamics and finite-time contraction stability for age-structured HIV models with delay
Authors: Guo Wenjuan , Zhang Qimin , Ye Ming 
Published: July 2022

Abstract
Considering age of infected cells and intracellular delay in both virus-to-cell and cell-to-cell transmissions, this paper develops an age-structured HIV model with delay to investigate the global threshold dynamics, which show the uninfected and infected steady states of the model. Using the Lyapunov function and LaSalle's invariance principle, we show that the global threshold dynamics of the model can be determined by utilizing basic reproduction number. Moreover, given that sudden environmental changes can lead to uncertainty in parameters of the model, a stochastic age-structured HIV model with Markovian switching is developed to study the finite-time contraction stability, which characterizes transmission properties of virus over a finite time. The sufficient conditions of the finite-time contraction stability are obtained by employing the Lyapunov function and stochastic comparison theorem. Numerical examples are presented to illustrate the theoretical results, and numerical results show that different noise intensity and delay affect stability of the HIV models.
Normalized multibump solutions to nonlinear Schrödinger equations with steep potential well
Authors: Tang Zhongwei , Zhang Chengxiang , Zhang Luyu , Zhou Luyan 
Published: July 2022

Abstract
We are concerned with the existence of multibump solutions to the nonlinear Schrödinger equation

−
Δ
u
+
λ
a

(

x

)

u
+
μ
u
=
|
u

|

2
σ

u

in

R

N

with an L
2-constraint

‖
u

‖

L

2

(

R

N

)

2

=
ρ

in the L
2-subcritical case σ ∈ (0, 2/N) and the L
2-supercritical case σ ∈ (2/N, 2*/N), where the usual critical Sobolev exponent is 2* = +∞ if N = 1, 2 and 2* = 2N/(N − 2) if N ⩾ 3. Here

μ
∈
R

will arise as a Lagrange multiplier, and

0
⩽
a
∈

L

loc

∞

(

R

N

)

has a bottom int a
−1(0) composed of ℓ
0 (ℓ
0 ⩾ 1) connected components

{

Ω

i

}

i
=
1

ℓ

0

, where int a
−1(0) is the interior of the zero set

a

−
1

(

0

)

=

{

x
∈

R

N

|
a

(

x

)

=
0

}

of a. When ρ is fixed either large in the L
2-subcritical case or small in the L
2-supercritical case, we construct a ℓ-bump (1 ⩽ ℓ ⩽ ℓ
0) positive normalized solution which is localised at ℓ prescribed components

{

Ω

i

}

i
=
1

ℓ

for large λ. The asymptotic profile of the solution is also analysed through taking the limit as λ → +∞, and subsequently as ρ → +∞ in the L
2-subcritical case or ρ → 0+ in the L
2-supercritical case. In particular, we find ℓ-bump normalized solutions to the related Dirichlet problem

−
Δ
v
+
μ
v
=
|
v

|

2
σ

v
,

v
∈

H

0

1

(

∪

i
=
1

ℓ

Ω

i

)

,

∑

i
=
1

ℓ

∫

Ω

i

v

2

=
ρ
,

v

|

Ω

i

>
0

for

i
=
1
,
…
,
ℓ
.
Invariant tori for multi-dimensional integrable Hamiltonians coupled to a single thermostat
Authors: Butler Leo T 
Published: July 2022

Abstract
This paper demonstrates sufficient conditions for the existence of Kolmogorov-Arnol’d-Moser (KAM) tori in a singly thermostated, integrable Hamiltonian system with n degrees of freedom with a focus on the generalized, variable-mass thermostats of order 2—which include the Nosé thermostat, the logistic thermostat of Tapias, Bravetti and Sanders, and the Winkler thermostat. It extends theorem 3.2 of Legoll et al (2009 Nonlinearity
22 1673–94) to prove that a ‘typical’ singly thermostated, integrable, real-analytic Hamiltonian possesses a positive-measure set of invariant tori when the thermostat is weakly coupled. It also demonstrates a class of integrable Hamiltonians, which, for a full-measure set of couplings, satisfies the same conclusion.
PID Controller tuning by Virtual Commissioning - a step to Industry 4.0
Authors: Bysko Szymon , Bysko Sara , Fratczak Michal , Nowak Pawel , Klopot Tomasz , Czeczot Jacek , Stebel Krzysztof , Laszczyk Piotr 
Published: July 2022

Abstract
This paper deals with the validation of the concept of using virtual commissioning of the low-level industrial control systems to adjust PID controller settings. General hardware configurations and logical layers of the experimental setups, which were used during the experiments, are shown and described in details. It is shown how to determine the controller settings using pre-tuning and fine-tuning functionality, available in standard Siemens® Function Blocks Library, that have been launched in virtual commissioning environment. Comparison of the results is a basis to answer the question if the modern virtual commissioning tools currently used in industry have sufficient accuracy to be used as a master tool for the initial PID controller tuning. It is also important to know whether these systems are suitable for use as Industry 4.0 tools, as the simulation is one of its most important part. The first section in your paper
Passive wireless strain and crack sensing using a RFID-based patch antenna
Authors: Zhang Binpeng , Lyu Yan , Lee Yung-chun 
Published: July 2022

Abstract
As an important parameter of structural health monitoring, strain can be an important indicator for stress concentration and crack development. And stress/crack can effectively evaluate the health status of the structure. Micro-strip antenna strain sensing technology, as a passive wireless detection technology, is of great significance to the health monitoring of high-end equipment bearing structures. In this work, the UHF (Ultra High Frequency) RFID (Radio Frequency Identification) technology is combined with the micro-strip antenna technology. And the micro-strip antenna is used as the tag antenna to receive the energy emitted by the RFID reader and activate the tag chip of the RFID. Then the signal modulation technology is used to eliminate the noise interference in the environment, and the resonant frequency of the antenna changes with the strain/crack information is returned to the reader to realize the passive wireless strain and crack detection. Through the experiment, it proves that under different strain/crack states, the resonant frequency of the RFID-based antenna sensor decreases with the increase of strain or the increase of the depth of the crack.
Optimized LPDA Antenna for IoT Applications
Authors: Ng W H , Tiang S S , Lim W H , Teng K H , Karunamoothei V 
Published: July 2022

Abstract
In this new era of fast-growing industry revolution, IoT has become integral part of most industries. In this paper, a high directivity printed log periodic dipole array (LPDA) antenna printed on a FR4 substrate is proposed for the application of IoT communication. The simulation result of NSGA-II optimized antenna is then compared and validated with another optimization scheme, MOEA\D algorithm. The simulation results demonstrate that the proposed antenna has low sidelobe level of -13.9dB with the VSWR < 2 across the dual bandwidth of 0.3027 GHz and 5.6289 GHz from 4.2166 GHz to 4.5193 GHz and 5.8412 GHz to 11.47 GHz respectively. The proposed antenna has achieved a new low side lobe level of -13.9 dB. It is also possesses a wide bandwidth which enhanced from 2.52GHz to the dual bandwidth of 0.3027 GHz and 5.6289 GHz on 4.2166 GHz to 4.5193 GHz and 5.8412 GHz to 11.47 GHz respectively. It has a good realized gain of 8.42dBi with the increment of 1.42dBi after optimization. The multi objective genetic algorithm optimizes the realized gain, directivity, sidelobe level, bandwidth, standing wave ratio of the proposed antenna which is well suited for practical applications in physical layer IoT communication.
Research on Rapid Measurement Technology of Roughness Based on Light Scattering
Authors: Hongjun Wang , Chen Wei , Bingcai Liu , Ailing Tian 
Published: July 2022

Abstract
The roughness is an important parameter to evaluate the parts surface quality, so it is very important to measure the surface roughness of high-precision parts. In order to meet the needs of rapid and non-contact measurement of surface roughness, a new method based on optical scattering distribution is proposed in this paper. By analyzing the modulation effect of surface roughness on incident light, the relationship between surface roughness and scattering distribution is established. Based on the analysis of the characteristics of light source, detector and their relative position, the scattered light distribution measurement system is constructed. In the measurement system, the surface roughness is measured by real-time acquisition of scattering distribution. The roughness of different samples is measured by this method and white light interferometer, and the measurement standard deviation is less than 0.15nm. The measurement results show that this method is feasible and effective.
A new fretting fatigue loading method and its finite element simulation
Authors: Li H , Li J , Meng X , Shan L 
Published: July 2022

Abstract
Fretting damage is caused by small relative displacement between two bodies. It can result in loosening of fasteners or fatigue cracks. The traditional mode of fretting fatigue loading is to add a fixed normal load on the fretting pad and a corresponding fatigue load on the free end of the specimen. A new fretting fatigue loading method is proposed to simulate the actual working condition of spline coupling. A 3D finite element model is implemented to simulate the contact state in the process of bending fretting fatigue. The influence of cyclic bending load on the stress and strain of contact surface is studied. The new model is proved to be correct and effective.
Cobot as the Part of Multi-agent Model of a Manufacturing System
Authors: Foit K 
Published: July 2022

Abstract
In recent years an upward trend has been observed regarding the use of robots in the industry. It is caused, among other things, by introduction of assumptions that causes minimization of employee’s participation in the manufacturing process. Such approach allows improving quality, to optimize manufacturing costs, to increase productivity and at the same time introduce full supervision over the manufacturing process. However, there are still processes that are performed faster, and more efficiently by a worker, without the need for special training. In such cases, the implementation of the robot is not economically justified. However, it is possible to install a cobot that acts as an assistant in relation to the activities performed by the employee. In the industrial environment, cobots operate on the boundary between digitally control led systems and the domain of factory workers. This paper will discuss the problems relate to the use of agent approach in order to model the cobot as a part of multiagent model of a manufacturing system. An important issue is the interaction and communication with the worker and its consequences for the entire system. It is also necessary to take into account the information provided by HMI systems and signals coming from the appropriate sensors.
Experimental study on magnetic flaw detection of micro-defects in ERW tubes
Authors: Wang B , Kang C , Chen S 
Published: July 2022

Abstract
Chassis lightweight is one of the implementation of vehicle lightweight, the use of Electric Resistance Welding(ERW)welded pipe by bending and internal high pressure molding from the parts are an important part of the chassis components. Due to the limitation of welded pipe size, thin wall, high temperature and continuous production, the conventional nondestructive testing method is difficult to meet the continuous dynamic testing requirements of ERW welded pipe. In view of the small defect of ERW welded pipe, a method for detection of welded pipe defects based on the principle of electromagnetic induction is presented. Firstly, the fuzzy evaluation model of weld quality was established based on the fuzzy mathematics principle. Secondly, the welding mechanism of ERW was analyzed, and the microstructure of the weld was observed by metallographic microscope, and the microstructure of the weld was obtained. Finally, eddy current method, the low-frequency electromagnetic scanning method and magnetic induction method were used to detect ERW welded pipes. The data analysis shows that the magnetic induction method can realize dynamic detection and accurate localization of welded pipe defects, and the comprehensive detection effect is the best.
Collaborative robot UR10 integration with CNC lathe Haas ST10
Authors: Krot Kamil , Poskart Bartosz , Iskierka Grzegorz 
Published: July 2022

Abstract
The article describes the process of integrating a UR10 collaborative robot with a Haas ST10 CNC lathe. The integration has been implemented in order to operate the lathe in the technological process of shaft machining. The control systems for both devices were integrated using the digital input and output method. Correctness tests of the programmed machining cycle were carried out.
Experimental study of square and rectangular hollow section aluminium alloy columns
Authors: Ali Shafayat Bin , Georgantzia Evangelia , Kamaris George S. , Gkantou Michaela , Kot Patryk 
Published: July 2022

Abstract
Recently, aluminium alloys are extensively used in the construction sector because of their small self-weight, good corrosion resistance, low maintenance, high recyclability, and aesthetic appearance. However, one of the main disadvantages of these alloys is the low Young’s modulus, which may cause a stability issue of aluminium structural members. Moreover, currently available design standards for predicting buckling resistance of aluminium columns are generally conservative. Therefore, additional research is required to evaluate the actual structural behaviour of aluminium columns under axial compression. The present study experimentally investigated the buckling response of 13 square and rectangular 6082-T6 aluminium alloy columns subjected to axial compression. The properties of the aluminium alloy were achieved from tensile test of coupon samples. The compressive load was employed concentrically by using a knife-edge hinge to ensure pin supports on both ends of the specimens. The structural response of the columns observed from the tests is presented in terms of ultimate strengths, failure modes and load-mid-height lateral displacement relationship. Furthermore, the test results of the specimens are compared with the ultimate strengths calculated by Eurocode 9, showing that the latter provides conservative and scattered design estimations.
Improvement of the flow of polyethylene terephtalate (PET) by interposition of ball strata at the inlet of the spinning die
Authors: Afio Ayarema , Lolo Komlan , Drovou Soviwadan , Kassegne Komla , Dl Batako André 
Published: July 2022

Abstract
Polyethylene terephthalate (PET) is a material developed by industrial manufacturers, but which is also abundantly found as a recovery material in many daily activities. Since it is largely used in the textile industry, the objective of this work is to improve the flow of polyethylene terephthalate (PET) in textile spinning as an application using certain polymers to produce quality fabrics. The methodology adopted here is to interpose layers of balls to form a porous medium at the entry of a melt-index in laboratory or in industrial setting. This allowed to characterize the materials’ flow properties such as flow rate, flow index and viscosity. This study used two grids of diameter 9.50 mm to form a layer of ceramic beads of equivalent diameter included in the intervals of [0.25 - 1.6 mm] and [1.6 - 2.5 mm]. Under an equivalent load of 2,6 kg, applied to the material for the measurement of both its fluidity index, the density and its viscosity. The results obtained show a decrease in the fluidity index compared with the manufacturers’ reference values when the ball states are interposed at the input of the die. This was justified by a braking of the flow of the material into the porous medium formed by the balls which constitute the interposed porous state. Moreover, the increase in the viscosity of the molten polymer after interposing states confirmed the opposite behaviour of these two characteristics. Future works seek to show the influence of ball size on the flow characteristics such as viscosity, fluidity index and hot density of the material.
FEA study of Residual stress in composite materials in Abrasive Waterjet machining
Authors: Balashov Artem , Dybala Bogdan , Burduk Anna , Batako Andre DL 
Published: July 2022

Abstract
This work focused on the determination of residual stress in composite materials and structures during precision Abrasive Waterjet machining. A methodology was developed to determine and predict the residual stress using Finite Element Analysis along with a model for numerical optimization based on initial parameters. This method has the potential to be used for predicting manufacturing losses during machining of composite structure, and machining parameters in order to achieve optimal surface quality.
Application of Basalt Fibre Composites for Wind Turbine
Authors: Shvangiradze Merab , Inasharidze Ketevan , Batako Andre DL 
Published: July 2022

Abstract
Currently. in many countries, studies are undertaken to study basalt fibre, which is one of the interesting reinforcing materials for polymer composite materials. Unlike traditional materials, when using fibre composites, product production and material formation occur simultaneously. Therefore, this work carried out the study of the material in conjunction with the study of technologies for the manufacture of products. The results of the study of the mechanical properties of basalt fibre produced in Georgia and the results of studies carried out to determine the effectiveness of its use as a reinforcing agent in the manufacture of products are presented. Experiments to determine the strength were carried out both for a single fibre and for a fabric woven from it. This work has developed some technologies for the manufacture of two types of products - high pressure cylinders and rotor blades of wind power plants. In the first case, for reinforcing the polymer composite, a bundle of threads was used, and in the second case, a fabric woven from basalt fibre was used as a reinforcing material. The experiments to determine the material mechanical performance were carried out for a single fibre as well as for the woven fabric. Tensile and bending strength are presented along the a fully manufactured and operating wind turbine.