bluuebunny/crossref_metadata_2025_split huggingface dataset:
Preparation, Properties and Application of Homogeneous Polypropylene Cation Exchange Membrane
Authors: Jia Yifan , Tao Ran , Gao Degui , Yang Xuhong , Zhu Xinsheng 
Published: April 2023

Abstract
Electrodeionisation (EDI) is one of the most important methods for the separation and purification of heavy metal ions from wastewaters. Acrylic acid (AA) and butyl acrylate (BA) were grafted onto polypropylene nonwoven to prepare cation exchange membranes, which were used for EDI treatment of simulated Cu(II) wastewater. The effects of the ratio of two monomers, initiator and crosslinker on the microstructure, mechanical and electrochemical properties of the resultant homogeneous polypropylene membranes were investigated. The experimental results show that at the conditions of AA: BA = 2:1, BPO 3.75%, and PETA 7%, a grafting rate of over 240% is achieved with high IEC, low water permeability and good mechanical properties. However, too much crosslinking makes area resistance high. Compared to commercially available heterogeneous membrane, the resultant membranes have better Cu(II) separation, longer service life but lower current efficiency.
Edaravone-Loaded Sodium Alginate/Carboxymethyl Chitosan Composite Flim for the Healing of Chronic Wound
Authors: Li Jianxiao , Xu Chao , Sun Changkai , Guan Shui 
Published: April 2023

Abstract
High levels of reactive oxygen species (ROS) in the wound surface are one of the reasons why chronic wounds are difficult to heal. Using of free radical scavengers to reduce ROS levels and reduce the duration of toxic effects of ROS can accelerate the healing of chronic wounds. In this study, a novel edaravone (Ed)-loaded sodium alginate (SA)/carboxymethyl chitosan (CMCS) antioxidant composite film was prepared, and the physicochemical properties and biocompatibility were analyzed. The results indicated that the SA/CMCS/Ed films were hydrophilic, with excellent water absorption and water retention, and also exhibited adequate mechanical properties. The exploratory drug release investigation revealed that the increase in SA content plays a critical role in the Ed release process by improving the binding ability of the composite film to the drug, resulting in slow release. In addition, cell experiments confirmed that the SA/CMCS films with Ed content of 20% and 30% not only had no cytotoxicity, but also significantly promoted the cell viability of fibroblasts from oxidative stress injury induced by hydrogen peroxide. These preliminary results suggested that the Ed-loaded SA/CMCS composite film can be further used for the study of chronic wound dressings, which is expected to provide new ways for the treatment of diabetic foot ulcers, lower extremity venous ulcers and arterial ulcers.
Thermodynamic Analysis Modelling of In Situ Al-Ti-B Alloy Formed by Fluorine Salt Method
Authors: Wang Minghao , Zhang Guangzong , Guo Lili , Li Junwen , Li Gengyang , Guan Renguo 
Published: April 2023

Abstract
Al-Ti-B master alloy is currently the most widely used grain refiner in aluminum alloys. Reaction controlling plays an important role in changing alloy microstructure and improving the refining effect. In this paper, Al-Ti-B master alloy is prepared by the fluoride salt method, and the control of the in-situ generated phases is realized by establishing a thermodynamic analysis modelling. Results show that the reactant change caused by the difference of alloy system directly determines the reaction sequence, which in turn affects the type and quantity of phases. The combination of elemental Ti and B is affected by the reaction system. When KBF4 is firstly consumed, TiB2 and TiAl3 are produced. And when K2TiF6 is firstly consumed, only TiB2 and AlB2 are generated in the system. Thermal balance calculation results indicate that aluminothermic reaction has a contribution to the pool temperature, which facilitates to improve the kinetic conditions of the reduction reaction.
Machine Learning Model of Oilfield Productivity Prediction and Performance Evaluation
Authors: Song Laiming , Wang Chunqiu , Lu Chuan , Yang Shuo , Tan Chaodong , Zhang Xiongying 
Published: April 2023

Abstract
Accurate and efficient prediction of oilfield productivity is very important for the formulation of development and adjustment plans. Machine learning (ML) productivity prediction model can quickly obtain the productivity of oilfield development. In this paper, an oilfield development productivity prediction model based on five ML algorithms including multivariable linear regression (LR), extreme gradient boosting (XGBoost), light gradient boosting machine (LightGBM), back propagation (BP) neural network and long short term memory (LSTM) neural network is established. Through the evaluation of model performance indicators (include the root mean square error (RMSE), the coefficient of determination (R2), the mean absolute error (MAE) and mean absolute percentage error (MAPE)), the best performance prediction model is selected. The research results show that the prediction results of LR model are greatly affected by the data of high productivity oil wells, XGBoost model are easily affected by fitting, and BP neural network model is far less effective than other models. Through comprehensive comparison of prediction results, LightGBM model has better stability and generalization performance. The difference between the prediction results of each model is mainly caused by the characteristics of the algorithm and the size of the data sets. At the same time, LSTM can predict the future oil well production based on the oil well time series observation data. The research results of this paper have guiding significance for the selection of productivity prediction model for oilfield development based on data-driven.
Study of Air Pressure on Arc Ion Plating on Epoxy Resin Matrix Composites at Meter Range Working Distance
Authors: Meng Chao , Ma Zhandong , Xue Hongming , Yue Shoujing , Gao Zhen , Liu Xing 
Published: April 2023

Abstract
The metal film was deposited on the surface of epoxy resin based composite by arc ion plating technology. The distribution of metal ions at the interface of matrix was simulated. The growth mode of metal ions on the composite surface was analyzed. The deposition rate, surface morphology and membrane base bonding strength were investigated. The results show that the transition layer of nm level will be formed on the surface of composite materials, and the larger the sputtering energy of metal ions, the deeper the distribution on the surface of composite materials. Nucleation occurs at the junction of fiber and resin matrix, and the fusion of nucleated particles grows along the fiber boundary with the increase of deposition time, and extends to the vertical fiber direction. Finally, the particles between fibers and the particles on the boundary gradually expand and merge into layered films. The working pressure decreased, the deposition rate of metal increased, the grain size decreased, the large particles on the surface of the metal coating decreased, and the bonding strength of the film base increased.
The Law Study of Arc Ion Plating on Cyanate Ester Composite Surface
Authors: Xue Hongming , Wang Fengchen , Meng Chao , Zhang Ping , Yue Shoujin 
Published: April 2023

Abstract
Silver film was deposited on cyanate ester composite by arc ion plating technology; the thickness of the coating, the surface resistance of the coating, the surface morphology and the membrane-based bonding strength were measured by surface profiler, four probe instrument, election microscope and electronic tension machine respectively. The influences of different process parameters on the deposition rate, electronic conductivity and feeding force of metal films were obtained by analyzing the test results. The results show that the target distance is the most important factor affecting the deposition rate of metal silver. Under the same working current, the lower working pressure, the higher deposition rate of metal silver on the surface of cyanate ester composite, the higher membrane-based bonding strength and the finer surface. The higher the working current, the higher the average deposition rate, the better the thickness and hardness of the metal coating. The uniformity of film was greatly improved by optimizing the parameters.
Causes of Ponding in Foundation Gallery of Fenhe Reservoir II Gravity Dam
Authors: Wang Runying , Xu Miao , Zhou Yonghong 
Published: April 2023

Abstract
The multi field coupling mechanism of seepage, stress and temperature coupling of concrete gravity dam is analyzed, and its coupling control equation is deduced. Based on the analysis of the temperature effect of cracked concrete dam, a three field coupling model of seepage, stress and temperature based on pore crack dual medium suitable for the characteristics of RCC gravity dam is established, and its implementation strategy in COMSOL Multiphysics is studied. The three-dimensional finite element model of the overflow dam of Fenhe Reservoir II is established, and the annual working behavior of the overflow dam section is simulated in COMSOL Multiphysics. The variation law of dam seepage characteristics under the coupling action of seepage, stress and temperature is obtained. It is considered that the ponding in the gallery mainly comes from the crack leakage, and the temperature and headwater elevation are the main factors affecting the crack leakage of the dam.
A Simple Analytical Approach for Stress Calculation of Solar Cells
Authors: Li Zhiqi 
Published: April 2023

Abstract
A simple analytical solution was proposed for stress evaluation of the solar cells. The present solution was then applied to the stress calculation of the cells in 1580mm×808mm PV module, the variation of the wind pressures and the shear storage modulus of the EVA were taken into account in calculation. The results from the present solution show in good agreement with those by FE.
Study on the Engineering Properties of Waste Soil-Based Flowable Fill
Authors: Liu Hao , Huang Zheng , Qi Wen , Shi Han , Yao Lijuan 
Published: April 2023

Abstract
Flowable fill is developed mainly for the difficult backfilling and compaction such as side trenches of foundation pits and retaining wall backfills. It can make use of waste soils. It has good flowability before curing, and thus can be compacted by its own weight. It also has high strength after curing. In this study, by using on-site waste soils as the raw material soil, 25 groups of flowable fill experiments were carried out. The relationship between flowability, strength and mix ratio of flowable fills was analyzed. The results show that the flowability of flowable fill increases with the increase of water-soil ratio and decreases with the increase of cement-soil ratio. It shows that the water-soil ratio is the main control index of its flowability. The strength of flowable fill increases with the increase of cement-soil ratio, and decreases with the increase of water-soil ratio. The water-cement ratio can be used as the main control index for the strength of the material within the tested range.
Rigid Spliced Box Girder Bridge under the Action of Foundation Settlement Difference Analysis of Mechanical Behavior of Splice Section
Authors: Xu Liang , Qiu Zhefeng , Li Yang , Dong Yidan , Zhou Xiaoyong 
Published: April 2023

Abstract
In a main line viaduct widening project, the old bridge is 35m+55m+35m three-span variable section prestressed concrete continuous box girder, which has the characteristics of large width, long span, variable section of beam body, large cantilever (4.05m), and transverse prestressed steel beams arranged on the bridge panel, etc. The old and new box girders adopt rigid joint scheme. Articles on rigid splicing box girder bridge in foundation settlement under the action of splicing mechanical properties to carry out the finite element analysis, the results show that the new bridge under the action of foundation settlement difference, longitudinal pier fulcrum position splicing under high horizontal stress, transverse middle fulcrum section splicing appeared transverse stress peak period of angular point position, may result in the crack of the concrete; There is a linear relationship between the level of additional internal force and the settlement difference of foundation, which is about 0.95MPa/mm. The calculation stress value of splicing segment can be reduced by reducing the thickness of splicing segment. In practical engineering, control and adjustment measures such as preloading of new bridge structure and selecting adjustable high support can be used to improve the force condition of splicing section[1][2].
Finite Element Analysis of PolyLactic Acid (PLA) under Tensile and Compressive Loading
Authors: Aldosari Fahad , Khan M. A. A. , Asad M. , Djavanroodi F. 
Published: April 2023

Abstract
Additive manufacturing or 3D-Printing technology is being utilized heavily in recent times, especially in a range of manufacturing industries. Many types and sizes of 3D-printers are being utilized in producing ceramic, metal, or plastic components. This technology is serving society in many aspects, such as minimizing environmental impact, reduction in cost, and even material consumption. Polylactic acid (PLA) is a thermoplastic filament type material used in Fused Deposition Modelling (FDM) 3D printers. In this study, finite element analysis is used to simulate the mechanical behaviour of PLA in both solid and a 60% infill conditions. Simulations are done to predict strength and other mechanical properties in both tensile and compressive loadings using ABAQUS. The results provide insight on the performance of PLA under above mentioned conditions. It is concluded the carefully selected infill pattern can result in less material consumption together with nearly same mechanical performance as the sound PLA objects.
Toughening and Strengthening Modification of Flame-Retardant High-Impact Polystyrene
Authors: Chen Yijun , Zang Chongguang , Zhu Xiangdong 
Published: April 2023

Abstract
In this study, to improve the flame-retardant and mechanical properties of high-impact polystyrene (HIPS), DBDPE/Sb2O3 and HBCD/DBDPE/Sb2O3 were used to modify HIPS for flame retardant, where HBCD/DBDPE played a synergistic role in the segmental flame retardant of HIPS. The mechanical properties of flame-retarded HIPS were improved through surface, toughening and reinforcement modification, while the flame-retardant level of HIPS was guaranteed at UL94V-0. The flame-retardant and mechanical properties of flame-retarded HIPS were characterized by tensile test, impact test, LOI, UL94, TGA, DTG, DSC. The results indicated that HIPS modified with HBCD/DBDPE/Sb2O3 achieved UL94V-0 (3.2 mm), and the LOI of the modified HIPS was nearly double that of unmodified HIPS. The mechanical properties of the modified HIPS were optimized when the particle size of Sb2O3 was 500 nm, and 2-3 wt% titanate coupling agent NDZ101 was added to the flame retardant. Compared with the flame-retarded HIPS modified without tougheners and reinforcements, the HIPS modified by 22%PPO and 15%SEBS was improved the tensile strength by 33.5%, the impact strength by two times, and reached the excellent flame resistance of UL94V-0.
Adsorption of Volatile Organic Compounds via Cellular Material Produced from Aluminum Dross
Authors: Chien Kuang-Li , Chen Chun-Liang , Liang Chih-Chao , Chuo Hsien-Ho , Yang Sheng-Fu 
Published: April 2023

Abstract
In this study, the aluminum dross collected in the production process of the aluminum smelting industry was used as the raw material for mixing with an alkaline solution to make aluminum hydroxide where aluminum was extracted by a titration procedure. When the pH value of the solution is 10~13, the crystal forms of the precipitation products are monoclinic and hexagonal, and the particle size is about 0.25~4 μm. To develop and establish a circular economy in the aluminum industry for aluminum smelting slag where aluminum hydroxide and alumina are environmentally friendly adsorption materials can help to solve environmental problems caused by waste, increase the life cycle of resources. Cellular material produced from aluminum dross are used to carry out the adsorption characteristics test of volatile organic compounds, and the average adsorption amounts for acetone and toluene were 1.20 and 1.87 μg/g, respectively. This cornerstone results had demonstrated the design and development of the expansion of resource-based adsorption materials can meet the needs of various industries.
Experimentally and Numerically Investigate of the Critical Diameter of Aluminized DNAN/RDX Melt-Cast Explosive
Authors: Cao Tongtang , Zhou Lin , Zhang Xiangrong 
Published: April 2023

Abstract
This study experimentally investigates the effect of RDX particle size and crystal quality, as well as aluminum particle size and content on the critical diameter of aluminized DNAN/RDX melt-cast explosive using the continuous wire method. Ultimately, the critical diameter increases when the particle size of both RDX and aluminum, as well as RDX crystal quality increases. Contrastingly, the critical diameter decreases when the aluminum content increases. Besides, we employed the Ignition and Growth reaction flow model to simulate the effect of RDX particle size and crystal quality, as well as aluminum particle size and content on the critical diameter.
Analysis of Low Mechanical Properties of 1420 Al-Li Alloy in Tensile Test
Authors: Liu Peishuo , Cheng Jun , Chen Hao , Yang Zhongwei , Li Yue 
Published: April 2023

Abstract
The mechanical properties of 1420 Al-Li alloy tensile specimen were tested after T6 heat treatment. The mechanical properties of some specimens were lower than the standard requirements. In this paper, the reasons for the low mechanical properties of tensile specimens were analyzed by means of electron microscope observation, metallographic examination and hardness examination. The results show that after T6 heat treatment, the surface of the sample is rough and the depth of the oxide layer is different, and the notch sensitivity of 1420 alloy is very high. During the mechanical properties testing, the deep oxide layer becomes the stress concentration point and the source zone of tensile fracture, which reduces the overall mechanical properties of the sample. After heat treatment, the surface of the specimen is formed with low hardness white bright band structure, which also reduces the mechanical properties of the specimen. The high content of Zr in the fracture source region of some samples also leads to the unqualified mechanical properties.
Failure Analysis of High Pressure Hose in Hydraulic Loading System
Authors: Li Yue , Bai Yan , Li Xiaolin , Liu Peishuo , Shi Changwei 
Published: April 2023

Abstract
During the low temperature static test of a certain model, the hose of the hydraulic system leaked oil and bulged. In this paper, through the macroscopic observation and analysis, anatomical observation and analysis, scanning electron microscope analysis and infrared spectrum analysis of the failed high-pressure hose, the reason for the failure of the high-pressure hose is obtained: due to the cracking failure of the inner rubber, the high-pressure oil in the pipe leaks outward, and the outer CPE material leaks or bulges locally. The reason for the cracking of the inner rubber is mainly related to two factors: 1) the inner steel wire winding layer of the hose is locally uneven, and there are bridging and overhead phenomena; 2) the inner rubber has low elongation and poor compatibility of deformation.
Study on Microstructures and Properties of the Al. Alloy Vacuum Die-Cast Parts of TL117 and C611
Authors: Han Lijun , Wu Xuesong , Zhu Junjie , Bai Ming , Zheng Xiaohong , Zhang Ze 
Published: April 2023

Abstract
The microstructures and properties of the vacuum die-cast Al. alloy C611 were studied by taking the vacuum die-cast Al. alloy TL117 as a reference. The purpose is to cancel the T6 heat treatment and part correction process in the die-cast Al. alloy production in order to reduce the cost of parts. By adding rare earth element Sr, the crystallization process and crystal morphology can be controlled, by which the grains can be refined and the phase transformation stress can be controlled properly. The strength and deformation of the part can meet the design requirements. By comparing the microstructures, second phases, strength, elongation, fracture morphologies and crystallization latent heat of the two materials, the mechanisms of high performance and small deformation of the C611 part were obtained. The research of the vacuum die-cast Al. alloy without heat treatment and correction is of great significance to the application of Al. alloys in automobile field.
Contact Electrification Characteristics of Polytetrafluoroethylene and Metal
Authors: Ding Ruihuan , Si Xiaoliang , Qu Minglei , Yan Wei , Li Qiuliang , Duan Zemin 
Published: April 2023

Abstract
In industrial production, the contact electrification phenomenon between materials will cause equipment damage and bring potential safety hazards to personnel, so it is necessary to study the contact electrification mechanism of materials. In order to explore the contact electrification characteristic mechanism between polytetrafluoroethylene and brass, aluminum alloy, a contact separation electrification test platform was built to pay attention to the change rule of surface potential of composite materials under contact pressure, environmental relative humidity, temperature and material temperature difference. The test results show that the surface potential first increases and then decreases slightly with the increase of contact pressure, and the surface potential is stable when the contact pressure is greater than 7 KN; The contact electrification of materials decreases with the increase of relative humidity; At 15°C ~35°C, the material surface potential is proportional to the temperature; With the temperature difference between the two test materials becoming larger, the contact potential shows a law of first increasing and then decreasing. Through the analysis of the contact electrification characteristics of materials under different conditions, it can provide a direction for further research on the contact electrification mechanism and industrial electrostatic protection.
Stress Analysis Around the Interference-fit Joint of CFRP/metal Stacks
Authors: Song Danlong , Wang Yuanhao , Yang Zhenchao , Hua Keyi 
Published: April 2023

Abstract
Carbon fibre reinforced polymer (CFRP) composites and traditional metal alloy are both widely applied in modern aircrafts. The mechanical performances between CFRP laminate and metal alloy are totally different, the stress of CFRP/metal stacks around the interference-fit joint is severely non-uniform. Therefore, the stress distribution for the contact interface of CFRP/metal stacks was investigated by finite element simulation in detail. First, the assembly process of the interference-fit bolt with CFRP/metal stacks was partitioned into six stages. Secondly, an accurate 3D finite element model was established by ABAQUS to simulate the hi-lock bolt interference fit assembly process with CFRP/metal stacks. Finally, the stress magnitude and distribution of interference-fit interface were compared and analysed. It was observed that the interference percentages and friction coefficient were the two major factors that affected the non-uniform stress distribution. The stress on the contact interface of the stacks was less than that on the free surface and decreased with moving away from the bolt.