bluuebunny/crossref_metadata_2025_split huggingface dataset:
Modification of Multi-Functional Composites by Using Particles with High Thermal Conductivity to Improve Heat Management and Electromagnetic Shielding Performance
Authors: Zhao Minna , Xu Baosheng , Chen Yanfei 
Published: August 2023

Abstract
Packaging materials with thermal management and electromagnetic protection are designed to develop miniaturized high-power airborne electronic equipment and meet the overall design requirements. In this study, graphene/paraffin composite material modified by high thermal conductivity particles is used to improve thermal conductivity, thermal management efficiency, and electromagnetic performance. Four kinds of high thermal conductivity particles including nickel, silver, copper, and hexagonal boron nitride were selected. Modified phase change material composite with carbon matrix was prepared by melt blending and pressure molding. Microstructure, thermal conductivity, latent heat, and electromagnetic properties were tested. Particles with different high thermal conductivity values could be uniformly distributed in the composite material by melt blending. Adding particles can improve the thermal conductivity of the composite to varying degrees, and copper and silver can also improve the electromagnetic shielding effectiveness of the composite. The composite material added with silver particles has the best modification effect, with a 92.3% increase in thermal conductivity and a 32.8% increase in shielding efficiency.
The characteristics of porous baffles reducing the impact load of liquid nonlinear sloshing
Authors: Shen Minmin , Sun Chuanbin , Tong Baohong , Chen Cuiqian 
Published: August 2023

Abstract
The study aims to explore the characteristics of the impact load of a ship under the influence of a harsh marine environment. The horizontal excitation test platform is established to analyze the response law of the external excitation frequency of the sloshing load. Moreover, nonlinear liquid sloshing impact load characteristics are analyzed under porous baffling with different solids ratios and tanks with different liquid depths. It is found that the resonance frequency of the tank without baffling is 0.93ω
0, and that of the tank with a porous baffle is 0.96ω0. With the solid ratios of 0.4 to 0.8, the transient and steady state pressure peaks decrease by 66% and 71%, respectively. The liquid depths of H to H/4, for both transients and steady state pressure peaks, decreased by about 36%. It shows that the resonant frequency is closer to the natural frequency when the amplitude of liquid sloshing is reduced. When the solid ratio is smaller or the liquid depth increases, the impact load of liquid on the wall is stronger, and the double peak of impact load is more obvious. This provides a reference for the engineering design of the liquid tank and the study of fluid sloshing damping.
The Johnson-Cook Constitutive Model of TA19 Titanium Alloy
Authors: Tang Wenting , Liu Changli , Zhang Kaiming 
Published: August 2023

Abstract
In order to obtain the stress-strain relationship of the TA19 titanium at 10−3 s−1 to 4100 s−1 strain rates, a quasi-static tests and a Split Hopkinson Bar were performed at room temperature. The Johnson-Cook model analyzed and the parameters in the constitutive equation are fitted according to the experimental data. SHPB tests of TA19 titanium at strain rates of 1100 s−1, 2000 s−1, and 3300 s−1 were simulated by using ANSYS/LS-DYNA. Comparison of experimental data with simulation data shows that the J-C model can correctly reflect the material properties of TA19 titanium within a certain strain rate range.
Thermodynamic Calculation of 2618 High Performance Aluminum Alloy
Authors: Chen Shanshan , Huang Zicheng , Chai Zhizhang 
Published: August 2023

Abstract
The thermodynamic-related physical parameters, precipitation amount of equilibrium phase, and initial precipitation temperature of Al-(1.9–2.5) Cu-(1.2–1.8) Mg-(0.9–1.5) Fe-(0.9–1.5) Ni alloy were simulated by using the thermodynamic simulation software JMat-Pro. The results show that with the change of element content, the liquidus temperature is in the range of 641.92–638 °C. The precipitation transition temperature of the eutectic phase with a low melting point ranges from 515 °C to 517.25 °C. The solidus temperature is closely related to Cu/Mg. The dendrite spacing decreases with the increase of Mg and Fe (Ni) contents, among which Mg has the greatest influence, followed by Fe (Ni) and Cu. The partial molar Gibbs free energy of Cu, Mg, Fe, and Ni is negative. The activity of Mg increases with the decrease in temperature, and the maximum activity is 0.10189, while the activities of Cu, Fe, and Ni are close to 0. The initial precipitation temperatures of S(Al2CuMg) and Al9FeNi phases are 424–450 °C and 635.4–643.01 °C, respectively. The initial precipitation temperature of the Al9FeNi phase decreases with the increase of Cu and Mg contents, while it increases with the increase of Fe (Ni) contents. With the increase of Cu and Mg contents, the initial precipitation temperature of S(Al2CuMg) increases and decreases with the increase of Fe (Ni) contents. The precipitation amount of S(Al2CuMg) mainly depends on the content and ratio of Cu and Mg, while that of Al9FeNi increases with the increase of Fe and Ni elements in the same proportion.
Design of rapid erection system for transmission lines for disaster rescue
Authors: Zhao Bingliang , Guo Zhigang , Yang Wei , Lu Yanling 
Published: August 2023

Abstract
The rapid erection system of transmission lines in disaster relief can restore the power supply in the disaster area in a very short time. It takes a long time to construct transmission lines in post-disaster relief and reconstruction. This paper designs the transmission line erection system with the idea of light quality and modularization and puts forward the dimensions and structures of auxiliary hoisting towers and overhead towers. Then, considering that the transmission line is a tall flexible structure, which is very sensitive to wind load, the finite element model of the transmission tower is established to analyze the simultaneous stress of the overhead tower and the lifting tower under extreme conditions. The study verifies the feasibility and stability of the designed transmission line rapid erection system.
Multi-Scenario Clustering-Based Distribution Network with Distributed Power Sources Operational Risk Warning Method
Authors: Ouyang Wenhua , Chen Yaqi , Li Qiong , Meng Tianqi , Cai Muliang 
Published: August 2023

Abstract
Risk assessment of the operation of distribution networks containing distributed power sources is the most important way to ensure the safe operation of distribution networks. In this paper, the main objective of the study is to assess the risk of the distribution network with distributed photovoltaic (PV) based on time-series risk analysis in multiple scenarios. Firstly, the PV output and load demand power of each time of the year are composed of multi-series data, which are clustered into several typical scenarios throughout the year, and the corresponding weights are obtained. The risk assessment and analysis are carried out in each scenario, and the risk warning is carried out according to the warning criteria. The feasibility of the proposed method is verified using an IEEE 33-node distributed system example.
Global Asymptotic Stability of Submodule Capacitor Voltage Self-converging Modular Multilevel Converters Based on Characteristic Root Method
Authors: Zhou Yiyuan , Qin Liang , Wang Qing , Yu Xue , Yang Shiqi , Liu Zhaoxun , Pu Qingxin , Liu Kaipei 
Published: August 2023

Abstract
This study presents global asymptotic stability verification of submodule capacitor voltage self-converging modular multilevel converters (SC-MMCs) according to the characteristic root method, which constructs a submodule switching state matrix for voltage balancing control. The mathematical model of MMC is established in form of the state-space equation. It is proved that SC-MMCs have the characteristic of global asymptotic stability at a certain time from the perspective of switching state matrix characteristic roots, according to the theories of Lyapunov stability and continuous-time piecewise linear system stability. Then, the submodule capacitor voltage self-convergence over a period of time is deduced based on the capacitor voltage deviation vector. Under the constraints of linearly independent switching state matrix row vectors, submodule capacitor voltage self-convergence without real-time voltage calculation and feedback can be achieved. The global asymptotic stability of SC-MMCs and the efficacy of submodule capacitor voltage self-convergence based on switching state matrix are testified by simulations.
3D Printing of Collagen Nerve Scaffold with Multichannel Characteristics
Authors: Wang Yi-chen , Zhang Li-ming , Guo Kai , Wang He-ran 
Published: August 2023

Abstract
Given the difficulty in preparing multichannel nerve scaffolds for peripheral nerve repair, a method of manufacturing multichannel collagen nerve scaffolds by multi-nozzle 3D printing technology was proposed. Gelatin material is used as the core melting material because of its temperature-sensitive characteristics. A collagen nerve scaffold with a multichannel structure was manufactured by temperature-rising removal after printing, and the scaffold with different collagen concentrations was analyzed and evaluated in terms of microtubule diameter and mechanical properties. The research results show that the mechanical properties of the scaffold are gradually enhanced with an increase in collagen concentration. When the concentration of collagen is between 5% and 6%, the quality of the microtubule is significantly improved compared with the 4% collagen scaffold. Combined with the distribution of microtubule diameter, a lower concentration of collagen will lead to the collapse and deformation of the print structure, while a higher concentration of collagen will lead to the existence of voids in the print structure. Considering the manufacturing process, microtubule diameter, and mechanical properties of collagen nerve scaffold, 5% collagen nerve scaffold is the best and is expected to meet the requirements of peripheral nerve regeneration.
Fracture Characteristics of Super Duplex Stainless Steel after Hot Tensile Testing
Authors: Li Xianchao 
Published: August 2023

Abstract
This study’s temperature range of hot tensile testing is 1000–1200 °C, which is consistent with ordinary industrial hot working temperatures. The fractography of super duplex stainless steel S32750 after hot tensile testing is investigated with Optical Microscopy and Scanning Electron Microscopy, and Electron Back-scatter Diffraction and Transmission Electron Microscopy study hot deformation behaviors of the necking area. The results reveal that ~1050–1150 °C is the optimal hot working temperature range regarding hot ductility and cracking sensitivity. The micro-voids nucleate at the ferrite-austenite interphase boundaries following the Kurdjumov-Sachs (K-S) or Nishiyama-Wasserman (N-W) orientation relationship at 1000 °C. Therefore, a quasi-cleavage fracture forms along the interphase boundaries. At the temperature range 1050–1150 °C, a uniform distribution of fracture surface is formed, and the highest Reduction in Area appears at 1150 °C. Dynamic phase transformation occurs with the formation of secondary austenite at ferrite grain boundaries at 1200 °C, which results in an intergranular fracture surface morphology.
Screen Printing Preparation of Porous Cu Integrated Electrode as a High Sensitivity Enzyme-Free Glucose Sensor
Authors: Zhao Yajun , Huang Zeya , Fu Renli 
Published: August 2023

Abstract
Herein, a three-electrode coplanar integrated electrode was prepared by the screen-printing process. By designing a reasonable electrode structure, a scheme for the preparation of three-electrode coplanar Cu (OH)2/Ag/AgCl/C/Al2O3 integrated electrode by screen printing was proposed. The morphological structure of the material was investigated by SEM, EDS, and XRD characterization methods. Moreover, the availability of the electrodes was characterized macroscopically using an electrochemical workstation. As the results showed, the innovative sensor exhibited excellent detection performance for the catalytic oxidation of glucose. Electrode sensitivity was up to 14.376 mA mM−1 cm−2 in the glucose range of 1 μM–0.05 mM, while, excellent interference immunity and reproducibility were achieved.
Design of Metamaterial Absorber with Ultra-broadband and High Absorption
Authors: Li Xiu , Hu Chang Jun , Wang Yang 
Published: August 2023

Abstract
Metamaterial absorbers with perfect absorption properties are essential in various fields. A multilayer metamaterial disc absorber has been designed and analyzed using a finite-difference time-domain method. In the wavelength range from 300 nm to 3000 nm, this metamaterial absorber absorbs more than 90%. The metamaterial absorber is polarisation-insensitive due to its symmetric structure. On the other hand, the designed absorber still provides a high absorbance (>80%) at an incidence angle of 60°. Surface plasmon resonance (SPR), cavity resonance, local surface plasmon resonance (LSPR), and inter-resonance interactions dominate the absorber for efficient absorption and extended absorption bandwidth.
The Temporal Measurement of Infrared Femtosecond Fiber Laser Pulse with Complex Spectra: SPIDER and FROG
Authors: Lin Jiahe , Cai Yi , Xu Shixiang 
Published: August 2023

Abstract
Femtosecond fiber laser pulse (FFLP) is very suitable for precision laser processing (PLP) with the advantages of high power, compact integrated structure, and easy installation. However, with the power increasing, nonlinear optical effects (NOE) of fiber, such as self-phase modulation (SPM), will be greatly enhanced, and the spectra of the output pulse will be very complex, which considerably increases the temporal complexity of FFLP and takes an immeasurable influence on PLP, so it is of great significance to accurately measure the temporal property of FFLP for higher accuracy of PLP. This paper presents a self-referencing spectral phase interferometry for direct electric-field reconstruction based on a single grating stretcher (SGS-SPIDER) with the two-step phase shift (TSPS) method for measuring FFLP with complex and infrared spectra. Meanwhile, we present a modified pulse-retrieval algorithm called an adaptive pulse-retrieval algorithm (APRA) of frequency-resolved optical gating (FROG) to reconstruct the measured pulse accurately. The duration of the reconstructed pulse measured by FROG is 162 fs, whose autocorrelation curve is similar to the measured autocorrelation curve including the picosecond background. The error of the reconstructed FROG trace is 0.42%, which is reliable enough according to the literature experience. Finally, the unique advantages of FROG for measuring complex ultrashort pulses such as FFLP are compared with SPIDER; that is, FROG has a wider spectral phase measuring range than SPIDER. These studies provide a new diagnostic technique for the complete temporal characterization of FFLP with complex spectra and extend the measurement range and application of SPIDER at the infrared wavelength band, which is significant for improving the accuracy of PLP using FFLP.
Effect of macroscopic defects on optical properties of fluorophosphate glasses
Authors: Jia Wentao , Kou Xiaoyong , Gong Tang , Wang Jingjing , Xu Guangyi 
Published: August 2023

Abstract
Fluorophosphate glass is the core of laser materials and also has an important reference value for an optical lens. According to Kirchhoff’s law, this paper focuses on the optical loss of incident light entering fluorophosphate glass. The transmittance and refractive index of optical glass were measured by an ultraviolet-visible spectrophotometer (Uv) and V-prism tester. With the sample thickness increasing from 10 mm to 50 mm, the transmittance of grade 4 fluorophosphate glass decreases from 85.32 % to 76.91 %, and the scattering rate increases from 8.4704 % to 17.0591 %. The microstructure and internal images of macroscopic defects were obtained by projective optical microscopy. In addition, an electron probe (EPMA) was used to analyze the defective components and identify the main components of the defects. The results show that the high content of P/Al/O element is the main cause of optical loss.
Lamination Effect on Al-Mn Alloy During Can Forming
Authors: Yan Wenduan , Wu Yuanli 
Published: August 2023

Abstract
Fracture behavior of Al-Mn alloy after plastic deformation is studied by electron microscopy. Cracked can is mainly caused by the lamination of the Al-Mg alloy plate. Optimized melt treatment is the main way to solve the problem of lamination caused by microporosity. Microporosity can be eliminated by adjusting the casting speed and other technological parameters. As a result, the behavior of lamination of Al-Mn alloy during deformation is weakened. The rate of cracked cans in the process is reduced subsequently.
Study on the Effect of Microstructures and Properties of Al-Mg-Mn-Zr Alloy Welding Wire by Adding Minor Sc
Authors: Chen Min , Wu Yueyi , Chen Yun , Mao Hua , Chen Yue , Zhou Guxin 
Published: August 2023

Abstract
The low strength of welded joints of aluminum alloy welding wire materials has seriously restricted the promotion and application of high-performance aluminum alloys represented by 7A52 and 7B52 aluminum alloy. It is urgent to develop new high-strength aluminum alloy welding wire material to meet the lightweight application demand of 7××× series high-performance aluminum alloy materials in military and civilian vehicles. This paper studied the effect on microstructures, mechanical properties, and welding properties of Al-6Mg-0.3Mn-0.2Zr welding wire alloys by adding minor Sc elements. The result shows that it formed Al3Zr, Al3Sc, and Al3(Sc1-x, Zrx) primary dispersive phases in the matrix, and the Al3(Sc1-x, Zrx) primary phase, which had triple-shell microstructure composed of Al3Zr/α(Al)/Al3Sc three-layer phases enclosing individually with each other from the center to outside. These phases could promote heterogeneous nucleation during solidification and crystallization in the process of welding, resulting in strong refinement and strengthening effects in the weld-zone microstructure. The welding joint mechanical properties of both tensile strength and elongation increased with the increase of Sc contents within the range of 0–0.4%. It was reached at Rm 365 MPa/A 5% without means of heat treatment which are much higher than aluminum alloy welding wires used in current engineering when the 7B52 aluminum alloy laminated plates were welded with the prepared welding wire Al-6Mg-0.3Mn-0.2Zr alloys of 0.385% Sc.
Preparation and Properties of Aluminum Particles Reinforced Functional Coatings
Authors: Qi Pengyuan , Yu Linhui , Yang Jingshan , Wu Mengxuan , Lou Ming , Li Changsheng 
Published: August 2023

Abstract
In view of the upgrading of engine-bearing pad-coating materials, the preparation of functional coatings suitable for bearing pad surfaces sprayed with aluminum particles as the reinforcing phase has important application value. In this paper, the exploration of preparing composite coatings on the working surface of bearing pads with aluminum particles as the reinforcing phase was carried out through orthogonal experiments. The effects of different process parameters on the adhesion, bonding strength, and micro-hardness of the coatings during the preparation process were studied, which provided a theoretical basis for the preparation of functional coatings.
Flow field and erosion characteristics of the valve head of a vertical well inclinometer
Authors: Wang Xindong , Li Fuqiang , Zhang Lei , Zhou Lei , Huang Haoping 
Published: August 2023

Abstract
During the drilling, the flow field characteristics of the vertical well inclinometer are complex. In a harsh underground environment, the valve head is prone to erode and wear. To overcome these disadvantages, the three-dimensional (3D) model of the valve head of a vertical well inclinometer was developed, and the flow field and erosion characteristics were simulated by using a numerical program. Results show that the maximum velocity and the maximum turbulence effect occur at the throttling inlet through which the drilling fluid passes the guide sleeve. By analyzing the particle trajectory of the discrete phase model, it is found that the particles above the valve head surface have obvious accumulation and rebound phenomena and that the erosion effect appears to some extent on the valve head surface. Analysis of the shear stress on the surface of the valve head shows that the stress concentration occurs in the valve head directly impacted by the drilling fluid and in the groove of the flow drilling fluid, respectively. The feasibility and accuracy of the simulation are verified by comparing the theoretical results with that of the field test. This investigation can be used to explain the failure of the valve head of the vertical well inclinometer and provide the design and optimization of the valve head with scientific support.
Flexible a-InGaZnO Thin Film Transistor Based on Biocompatible Sodium Alginate
Authors: Liu Zhuo , Chin Hung-Chih , Huang Pei , Zheng Fei , Li Lei , Chang Kuan-Chang 
Published: August 2023

Abstract
Flexible electronics have attracted increased attention in advanced fields, such as electronic skin and flexible displays. However, most flexible electronic devices are made with polymers that lack biocompatibility and environmental friendliness. Meanwhile, the complexity of the manufacturing process further restricts the mass production of flexible devices. This study uses biocompatible sodium alginate (SA) derived from seaweed as a flexible substrate to fabricate a thin film transistor (TFT) without using lithography, effectively protecting the flexible substrate from eroding. The flexible TFT with SA substrate can be opened at the Vg of ~ 0 V, and the mobility 26.8 cm2/(V·s) is realized. Flexible TFT with SA substrate has desirable characteristics, such as biocompatibility, transparency, and high mobility, providing promise for advancing the implementation of electronic skin and flexible displays.
Experimental and Numerical Investigation on the Failure Behaviour of Multi-Stiffener Composite Panel Under Compression
Authors: Yu Fei , Yuan Fei , Wang Zhe , Chen Xiangming 
Published: August 2023

Abstract
Multi-stiffener composite panels are the primary components widely used in aircraft structures such as fuselage, wing box, and rear bulkhead, but they are typically sensitive to compressive load-induced buckling as the thin-walled nature of these components. This paper presents a numerical and experimental study on the compressive failure behaviour of multi-stiffener composite panels. A progressive damage model based on Hashin’s failure criteria was employed to model the failure behaviour of the laminates, while a cohesive zone model (CZM) was used to replicate the delamination between the stiffeners and the flat skin. The predicted initial buckling threshold and ultimate failure load agree well with the experimental data, which validated the simulation tool developed in this study. The failure mode of the MSCP was then dominated by the breakage of the stiffeners at their middle cross-section, simultaneously accompanied by delamination at the skin/stiffener interfaces. Results indicated that the initial out-of-plane buckling can cause a high level of peeling and shearing effects at the skin/stiffener interfaces, leading to skin/stiffener debonding as the compression increase. This subsequently introduced an additional bending effect to the stiffener, which eventually caused breakage in the middle stiffeners.