bluuebunny/crossref_metadata_2025_split huggingface dataset:
Design and simulation of chalcogenide perovskite BaZr(S,Se)3 compositions for photovoltaic applications
Authors: Thakur Nikhil , Kumar Pawan , Neffati R , Sharma Pankaj 
Published: April 2023

Abstract
Lead-free Perovskite materials have acquired a lot of interest owing to their potential to overcome the stability and toxicity concerns compared to traditional perovskite solar cells. Chalcogenide perovskites (ABX3, where A = Ba, B = Zr, X = S and/or Se) are emerging materials for photovoltaic (PV) applications. Computer-based designing of metal chalcogenide semiconductors, resulting in the identification of extremely appealing ABX3 substances and their derivatives that may be used as absorbers in thin-film PV devices. In this context, here the numerical studies are performed using the SCAPS-1D simulator for designing of chalcogenide perovskites-based solar cells. We used FTO (Fluorine-doped tin oxide), TiO2 as electron transport layer (ETL), BaZrS3, and BaZrSe3 as an absorber layer, Spiro-OMeTAD as a hole transport layer (HTL), and Au as a metal back contact. The simulations are conducted under AM 1.5G solar spectrum designed to maximise the efficiency of the proposed solar cell. The selection of the optimal parameters such as thickness, defect density and temperature for all the layers including absorber, FTO, ETM, and HTM is examined. The parameters are considered, keeping in mind their impact on solar cell performance, budget effectiveness, and the physics of the entire solar cell architecture. The effect of temperatures between 300 K to 450 K is studied. The results indicate that the power conversion efficiency (PCE), FF (fill factor), Voc (Open Circuit Voltage) and Jsc for BaZrS3 is 12.12%, 79.40%, 0.70 V, 22.00 mA cm−2, respectively, whereas for BaZrSe3 it is 25.84%, 77.32%, 0.72 V, 46.65 mA cm−2, respectively. This shows that BaZrSe3 has the potential to replace BaZrS3.
Sustainable Porous Carbons with Ultrahigh Specific Surface Areas for High-performance Supercapacitors
Authors: Ye Yajing , Lei Dongjun , Ren Xueyun , Chen Jifan , Wang Weixing 
Published: April 2023

Abstract
Waste biomass residues are prospective precursors for the preparation of sustainable porous carbons. In this work, we used the residues from Lonicera japonica Thunb and Ligusticum chuanxiong Hort to prepare porous carbons with ultra-high specific surface area (> 3000 m2 g−1), which deliver excellent capacitive performance for electrochemical double-layer capacitor. Porous carbon derived from Ligusticum chuanxiong Hort displays a specific capacitance of 314.4 F g−1 (1 A g−1) in three electrode system. The energy density of Ligusticum chuanxiong Hort-based symmetric supercapacitor reaches 8.4 Wh kg−1 at the power density of 519 W kg−1 in 6 M KOH. The cell remains a high energy density of 5.1 Wh kg−1 at an increased power density of 10.8 kW kg−1. Our work indicates that the waste biomass residues are promising and competitive precursors for the preparation of ultrahigh specific surface area porous carbons for supercapacitor application.
Synthesis and Electrochemical Properties of Fe2O3/rGO Nanocomposite Anode Materials
Authors: Li Lin , Liu Qing , Cheng Jinsong , Zhao Rongfei 
Published: April 2023

Abstract
The Fe2O3/rGO nanocomposites were prepared through a facile approach combining sol-gel synthesis with thermal reduction. The XRD, SEM, and electrochemical performance tests were used to study the relationship between the physical character and the electrochemical properties of the electrode material. As the anode material, the Fe2O3/rGO nanocomposites delivered excellent lithium storage properties, stable cycle performance, and high rate capability (707 mAh g-1 of 100 cycles).
It is demonstrated that the preparation of Fe2O3/rGO nanocomposites structured can effectively alleviate the particle pulverization caused by volume expansion, effectively shorten the diffusion distance of lithium ions, prevents the aggregation of Fe2O3 with the graphene, and improve the cycle stability of the electrode. Meanwhile, the incorporation of the Fe2O3 particles suppressed the stack of graphene layer.
Effect of Zn on Corrosion Resistance of 5083 Alloys
Authors: Shi Jianhao , Mu Yongliang , Shen Hua , Xing Na 
Published: April 2023

Abstract
The effect of addition of 1.5% -5% Zn (mass fraction) on the corrosion performance of alloy 5083 was studied. Homogenization and post-rolling of the alloy were analysed by immersion and electrochemical tests in 3.5% NaCl aqueous solution. The result is as follows: the rate of weight loss increases at the same soak time with the increasing of Zn element mass fraction. The weight loss rate of the alloy rolled is obviously higher than that of homogenized alloy at the same immersion time and Zn content mass fraction. The homogenization of the same components and the self corrosion potential and self corrosion current of rolled alloy at different soaking time are not very obvious. The effect of immersion time on the corrosion resistance of the alloy is not obvious. With the increasing of the Zn element mass fraction, the self-corrosion potential of the homogenized and rolled alloy decreases overall, so the corrosion resistance of the alloy decreases with the increasing of Zn element mass fraction. The homogeneously treated alloy has a higher self-corrosion potential than the alloy rolled, therefore, the alloy rolled has lower corrosion resistance than the homogenized alloy.
IRT and DIC Synchronous Detection of Stress Intensity Factors and Plastic Zone Ranges
Authors: Chen Ruohong , Huang Kai 
Published: April 2023

Abstract
To achieve non-contact in situ detection of stress intensity factors (SIF), this paper innovatively adopts the advanced IRT and DIC synchronous detecting system to measure SIFs as using plastic zone range to assist in determining the state of stress fields. Though this synchronous detecting method has been applied to analyze thermomechanical coupling effects of materials, it has never been used to detect SIFs, which requires a high accuracy of point stress state detection. Thus, to testify its feasibility and accuracy in SIF detection, three engineering materials were subjected to various loading conditions to provide sufficient verification. Firstly, the coefficients of volumetric strain and temperature change of different materials were calibrated by thermocouple and infrared thermography. Then, the compact tensile specimens were subjected to high-speed loading, of which the SIFs and plastic zone ranges were computed by taking several measurement points on infrared and deformation images. Compared with the theoretical values, the errors of the SIF and K-dominated range measured by this experimental method are all within 5%. It demonstrates that the synchronous detecting method has a wide application prospect in high-accurate crack tip strain field and crack development analysis.
Restoration Strategy of Distributed Power Supply in Distribution Network Based on Genetic Algorithm
Authors: Wang Lei , Niu Lin , Ma Zhiguang , Li Hongbo , Wang Li , Wang Tao , Zhang Zhenhai , Chen Lina 
Published: April 2023

Abstract
Nowadays, the penetration of distributed power in distribution network increases the complexity of power supply restoration. For the recovery of the traditional method in the field of distributed power supply system restore deficiency, the improving measures are put forward based on the many kinds of operation constraints, proposes the mathematical model of multi-objective optimization. In addition to conventional constraints in the mathematical model, will also be the network structure and branch power flow constraints into consideration. In view of the model, using the rough set theory, a multi-objective optimization problem into a single objective problem, and on this basis, considering the characteristic of radial network and the characteristics of the different load, by using genetic algorithm to reconstruct network, finally through the corresponding example recovery strategy is feasible and efficient.
Influence of Mg on Inclusions in 21-4N Valve Steel
Authors: Ji Dengping , Liu Beibei , Sun Han , Fu Jianxun 
Published: April 2023

Abstract
In order to explore the influence of different magnesium contents on the morphology, size, distribution and composition of inclusions in 21-4N austenitic valve steel, the inclusions in 21-4N austenitic valve steel with different magnesium contents smelted by high temperature resistance furnace were analyzed by Zeiss metallographic microscope and scanning electron microscope. The results show that the average yield of magnesium in steel is only 4.50% due to the high vapor pressure of magnesium in the laboratory smelting process. When the mass fraction of magnesium is 0-60ppm, with the increase of magnesium content, the main inclusions in steel mostly change from the initial Al2O3 and Al-Mn-O inclusions to Al-Mg-O spinel inclusions and Al-Mg-O composite inclusions. With the further addition of Mg, a large number of large-size MgO inclusions began to appear in steel. The average size of inclusions in 21-4N steel decreased from 4.576μm to 2.89μm, and the density of inclusions increased from 54 to 132 /mm2. The distribution uniformity of inclusions is obviously improved.
The Effect of Nonlinear Feature of Tire on the Control of Active Rear Steering at High Speed
Authors: Tan Zhenxian , Jin Yang , Liu Chengwu 
Published: April 2023

Abstract
The two-degree-of-freedom model of the vehicle is more accurate with considering of the nonlinear feature of tire. Based on the model, the active rear steering control strategy for achieving zero sideslip angle is yielded. Simulation results show that both of the two cases, constant and variable cornering stiffness, are useful in the control of sideslip motion, and using the variable stiffness due to the effect of load transfer in control strategy is more effective.
Seismic Behavior of Through-tenon Joints with Loose Gap
Authors: Li Shengcai , Chen Tao , Shi Shengxiang 
Published: April 2023

Abstract
In this paper, the dry shrinkage deformation of through-tenon joints (TTJs) is simulated by reducing the height of tenon to produce a gap between tenon and mortise. The seismic behaviors of TTJS such as the failure characteristics, hysteretic loops, skeleton curves, degradation of rigidity and energy dissipation were studied through low-cycle reversed loading experiment on 2 groups of TTJs with different degrees of dry shrinkage and sizes. The results indicate that the shape of hysteretic loops of all joints are Z shaped and the gathering effect gets more obvious with the increase of loose degree. The dry shrinkage deformation of TTJs will weaken the seismic performance of the specimens, with the energy dissipation capacity of the joint decreases with the increase of dry shrinkage deformation, and the energy dissipation capacity will be significantly weakened when the gap between the mortise and tenon increases slightly, for example, the energy dissipation capacity of the specimen will be weakened to 50% that of the intact specimen when the gap value increases to 3% height of the mortise.
Study of the Tribological Properties of Magnetic Fluid under the Surface Effects with Magnetic-pole Magnetic-groups
Authors: Xu Chunxia , Zhang Han , Hu Rui 
Published: April 2023

Abstract
The tribological characteristics of the magnetic fluid are studied with the change of multi-pole distribution in this paper. The maximum magnetic field strength and its gradient on the surface of the magnetic-group are analyzed by the finite element analysis of the magnetic field strength distribution at the same magnetic-group with the area ratio of 30%. The research results show that the matching distribution among N-S magnetic-pole groups at the same pole area ratio of 30% has less influence on the magnetic specimen surface, but the magnetic field distribution of magnetic-pole with the rectangular permanent magnet in the annular friction surface has the optimal range of magnetic field distribution design for specific magnetic fluid lubrication, in which pole group specimen 5 is the best magnetic-pole magnetic-group combination for friction reduction, and specimen 1 is the second best.
Research on Integration of Design and Manufacturing of High Thickness Honeycomb Sandwich Structure with Lager Curvature
Authors: Lu Honglong , Hao Lei , Meng Xiangmin , Jia Shunli 
Published: April 2023

Abstract
Based on the characteristics of honeycomb sandwich structure with high thickness and large curvature, the idea of integration of design and manufacturing was proposed to solve the problem of mismatch among design, process and material. Facing the particularity of this kind of structure, the honeycomb deformation simulation model was established. And the composite building block verification method was simplified aiming at solving the problems of sliding and collapse of high thickness honeycomb. A variety of honeycomb stabilization methods were proposed. And the verification contents at the material level, element level, sub component level and component level were specified. Taking the landing gear door parts of large passenger aircraft as a case, the idea of design and manufacturing integration and the building block process verification method of honeycomb sandwich structure was practiced leading to the forward design of gear door parts. The honeycomb deformation simulation model was preliminarily established, which provided a reference for the forward design of similar structural parts.
Comparison of the Beam Mechanical Properties between the CDG Based Geopolymer Concrete and OPC Concrete
Authors: Wang Kai , Zha Xiaoxiong 
Published: April 2023

Abstract
This paper presents the results of an experimental investigation on the beam mechanical properties, based on the completely decomposed granite (CDG) & slag based geopolymer reinforced concrete, as well as the OPC reinforced concrete. The failure mode and bearing capacity of beam members were obtained. The load vs mid span deflection relationship and load vs displacement relationship were discussed. Furthermore, the results show the feasibility of the CDG & slag based geopolymer concrete in engineering application.
Preparation of Conductive Hydrogel and Its Effect on the Proliferation of Neural Stem Cells
Authors: Xie Feng , Wang Shuping , Sun Changkai , Guan Shui 
Published: April 2023

Abstract
Conductive hydrogels open up new possibilities for neural stem cells (NSCs) transplantation for the treatment of neurodegenerative diseases (NDs) and traumatic brain injury (TBI). In this study, a novel carboxymethyl chitosan/gelatin/poly(3,4-ethylenedioxythiophene) (CMCS/Gel-PEDOT) hydrogel with different contents of EDOT monomer was prepared by lyophilization and in-situ polymerization. The samples were characterized in terms of mechanical properties, in vitro biodegradation, swelling rate, and electrical conductivity. All the hydrogels exhibited excellent viscoelasticity, showing compression properties similar to those of rat brain tissue. Moreover, the conductive hydrogels exhibited a high swelling rate (2500%~3000%) in 60-85 h and adequate biodegradability within 6 weeks. With the increase of PEDOT content, the electrical conductivity of prepared hydrogel increased significantly, and the CMCS/Gel-0.2 EDOT hydrogel presented the highest conductivity (1.5×10−3 S/cm). In addition, compared to the suspension culture group and the group without PEDOT, NSCs seeded into the CMCS/Gel-0.2 EDOT hydrogel showed higher proliferative activity after 10 days of culturing, indicating that the conductive hydrogel may be a competitive choice for enhancing nerve regeneration in neural tissue engineering.
Experimental Study of Ultimate Bearing Capacity of Axial Compression of L-type Steel Column
Authors: Chen Xin , Zheng Xiaoyao , Wang Xintang , Wang Zhanliang 
Published: April 2023

Abstract
The L-type steel column studied here is a special-shaped column composed of a square steel pipe and two of T-shaped steel, which are connected by weld. Because the columns have better properties than ordinary steel columns, it may be wildly used in residential steel structures. Therefore, it is quite valuable to study the bearing capacity and stability of the new steel columns. Three of specimens of the column are tested, and behaviour of deformation, distribution of displacements and stresses, and bearing capacity are presented. Effect of related factors on property of the steel column are discussed. It is concluded that the local buckling happened before finally failure of the column, which is sensitive to geometric defects.
Research on Rolling Bearing Operating Life Based on Principal Component Analysis
Authors: Wang Wengang , Hao Xu , Wang Yingchao , Yuan Yu 
Published: April 2023

Abstract
In order to analyze the running state of rolling bearing, the principle component analysis is used to extract new parameters to analyze the running state of the rolling bearing. Firstly, the whole life cycle vibration signal of the rolling bearing is collected by using an acceleration sensor. Secondly, Empirical Mode Decomposition (EMD) is used to reduce the noise in the vibration signal. Then, the main components of the time domain parameters are extracted using the principle component of the denoised signal. And the main components are synthesized into new parameter indicators. Finally, under the new parameter index, the envelope analysis is used to analyze the signal classification. The results show that the new parameter index can divide the entire life cycle of the rolling bearing into four different operating periods, each representing a different bearing operating state.
Microstructure and Macroscopic Characteristics of Powder Superalloy under Different Plastic Deformation Process Parameters
Authors: Lan Bo , Liu Shenghong , Ma Xingyu 
Published: April 2023

Abstract
Through the uniaxial compression deformation test, this work focuses on analyzing the microstructure evolution of the alloy in the two stages of dynamic softening and strain hardening in the true stress-true strain curve during hot deformation, including grain size, local misorientation and The interaction of its relative mobility, and through the grain boundary orientation difference and grain orientation, explained the dynamic softening mechanism and strain hardening phenomenon, so as to find the microstructure-determining characteristic parameters of the dynamic recrystallization nucleation and core growth of the alloy and its evolution.
Research on Strength Check Method for Expansive Stressed Grouted Clamp on Complex Joint
Authors: Zhang Yifei , Chen Yong , Zhao Zhangfan 
Published: April 2023

Abstract
For the strength check method of expansive stressed grouted clamp for repairing damaged joints of offshore platforms, a simplified method of clamp modeling and the grout check criteria suitable for complex joints are proposed. Then, for strengthening two penetration cracks in the PL19-3 offshore platform, the corresponding expansive stressed grouted clamp was designed. And the strength check on the clamp was carried out by ANSYS software employing the suggested method. It is shown that the equivalent stress of steel structure and the Tresca stress of grout ring are all within a reasonable range. This paper provides a simplified design idea for the finite element calculation method of the expansive stressed grouted clamp to repair complex joints.
Preparation and Characterization of Chitosan Grafted Tannic Acid for Anticorrosion Coating on Bronzeware
Authors: Chen Junying , Zhang Xiaoman , Zhang Linli , Zhou Sheng , Huang Xia 
Published: April 2023

Abstract
The protective bronze film was prepared by mixing the reaction product of oligosaccharide (COS) and modified tannic acid (TA) with polyvinyl alcohol and polyethylene glycol. Chloroacetic acid to carboxylate TA was used to generate sodium tannate. N,N’-Dicyclohexylcarbodiumide (DCC)/1-Hydroxybenzotriazole (HOBt) was used as a condensing agent to form an amide bond between carboxylic acid and amine to form COS-TA. The synthesized product was characterized using FT-IR, NMR, and thermal analysis. The surface morphology of the coating made of the synthesized product was observed using an optical microscope and scanning electron microscope. Electrochemical methods were used to determine the stability and corrosion inhibition performance of the coating. FT-IR, NMR, and thermal analysis demonstrated that tannic acid and Chitosan oligosaccharides were successfully condensed. Electrochemical impedance spectroscopy showed that the impedance increased, the corrosion current was significantly reduced, and the coating had a significant anti-corrosion effect.
Experimental and Prediction Model Study of Carbonation Resistance of High Performance Concrete under Influence of Curing Conditions
Authors: Chen Haibo , Zhou Dan , Huang Zhousheng , Wang Jiawei 
Published: April 2023

Abstract
The carbonation resistance of high performance concrete is closely related to the service life of concrete structure, and is an important parameter to reflect its durability. The carbonation resistance of concrete is influenced on selection of curing conditions greatly. In the paper, based on the common curing conditions, the carbonation tests of high performance concrete under different curing methods and curing time were carried out, and the influence mechanism of curing conditions on the carbonation resistance of materials was qualitatively analyzed. The exponential function expression of curing time and carbonation depth was fitted when curing by wet straws. The results show that: in terms of carbonation resistance, the order is wet straw curtain curing, plastic film curing and curing agent curing, and should be cured in advance. The carbonation depth is effectively reduced by short-term curing (3d) and medium-term curing (7d), but the reduction rate slows down, and 7d curing is suggested. The fitted prediction model is calculated the carbonation depth of concrete materials, and the test results are provided data for the selection of curing conditions and time of engineering.
Analysis of 00Cr17Ni14Mo2 Bellows Leakage
Authors: Zhang Jingyu , Li Xiaolin , Yang Zhongwei , Cai Naijia , Xia Shengyou 
Published: April 2023

Abstract
A multi-layer welded bellows made of 00Cr17Ni14Mo2 was found to have leakage points in the heat-affected zone of the weld during airtight inspection and leak detection by helium mass spectrometry. In view of the leakage of multilayer welded bellows, the reasons for the leakage of multilayer welded bellows areanalyzed by means of macroscopic observation, electron microscope observation, energy spectrum analysis, metallographic examination, microhardness test and chemical composition analysis. The results show that there are liquefaction cracks in the heat-affected zone of the outer bellows, which results in air leakage in the airtight test. The generation of liquefaction crack is related to the low Ni content in the material and the pollution of S and Cu elements. The cleaning treatment of the material surface in the welding area should be strengthened before welding to reduce the generation of cracks. At the same time, should be paid attention to the control of welding raw material composition.