bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study on Bending Strength of Cementitious Composites Based on Fiber Alignment
Authors: Zhang Ping , Lu Xiao-jun 
Published: September 2021

Abstract
The traditional cement-based composites can’t meet the needs of actual 3D printing, people are committed to get breakthroughs in printing materials and extrusion process. This paper introduces the preparation of fiber-reinforced concrete materials, determining the optimum content of glass fiber in composite cement-based materials, and studying the fiber alignment during extrusion. From the bending strength, the performance of 3D printed fiber concrete materials are comprehensively analyzed. As a result, the bending strength of the sample does increase to the fiber volume ratio. The composite cement-based material with 2 vol.-% aligned fiber can have an excellent flexural strength of 12.05MPa, and the samples along the extrusion direction are more excellent than that along the transverse direction.
Study on Frictional Force between Lining Concrete and Rubber Blocks
Authors: Zhou Zhiyong , Gao Sen , Chen Xiaolu , Guan Chengying 
Published: September 2021

Abstract
This paper mainly studies the friction coefficient between lined concrete and rubber blocks, designs the Friction resistance test device, puts forward two different Shaw hardness rubber blocks in different environments, and carries out the experimental research, obtains the corresponding coefficient of friction results, and provides the parameters and basis for the development of the special enclosure for the research of the subject.
Experimental study on particle breakage and fractal characteristics of coarse-grained soil
Authors: Jun Du , Xing-gang Shen 
Published: September 2021

Abstract
Particle breakage is an important factor affecting the strength and deformation of coarse-grained soil. In order to study the compaction characteristics and particle breakage effect of coarse-grained soil, the compaction tests of coarse-grained soil with different stone content and water content were designed. The results show that the dry density of coarse-grained soil first increases and then decreases with the increase of water content. With the increase of stone content, the maximum dry density and optimal moisture content of coarse-grained soil increase. After compaction test, the coarse-grained soil has obvious particle breakage phenomenon, and the particle breakage index increases with the increase of stone content and water content. The fractal dimension D can characterize the coarse-grained content of coarse-grained soil. With the increase of coarse-grained content, the fractal dimension D decreases gradually.
Application of non-destructive testing technology in construction steel structure industry
Authors: Wei Han , Lina Liu 
Published: September 2021

Abstract
High-rise buildings are mostly made of steel structures, and the damage detection technology for the welding process of steel structures still needs to be improved. Especially in the current welding process, there are problems such as the lack of data-based control mechanism and the uneven quality of the staff. The use of non-destructive testing technology can effectively detect defects in the welding process, while ensuring the quality of use of the steel structure. This article will study the application of non-destructive testing technology in steel structures, and provide some opinions and suggestions on the development of the construction steel structure industry by analyzing the problems that occur in the welding process.
Calculation on Short-term Stiffness of Simply-supported Beams with Gradient Concrete and Glass Fiber Reinforced Plastic Bars
Authors: Yao Lirong , Zhao Deyin , Zhong Rongqiang , Guo jing , Li Zhiming 
Published: September 2021

AbstractIt is of the advantages of high bearing capacity and economy for the gradient concrete beam with glass fiber reinforced plastic(GFRP) bars, so it will be applied widely in practical engineering. In order to acquire the short-term stiffness of simply-supported beams with gradient concrete and GFRP bars, 14 simply-supported beams were designed. Based on material constitutive model, finite element models of the beams are established by ABAQUS software. The stiffness variation law of the specimens is acquired. The simulation results are in good agreement with the experimental results, which proves the correctness of finite element modeling. Based on numerical simulation the stiffness calculation formula of the beams is provided, which can provide reference for the application of the beams in the actual engineering.
Study on the effect of ion invasion on compressive strength, resistivity and polarizability of concrete
Authors: Lu Si Tong , Huang Jun Ge , Zhang Yu 
Published: September 2021

Abstract
The structural safety of concrete has been attached great importance, especially in saline-alkali area. In order to better study the changes of physical parameters of concrete after corrosion in saline-alkali area, the soil quality in saline-alkali area was investigated and sampled to analyze the main ionic components of concrete corrosion environment. According to the corrosion ionic components, the concrete model was made by mixing carbonate and sulfate solutions with different concentrations. Resistivity method and induced polarization method were used to measure the resistivity and polarizability characterization of the model within the curing period (28d), and the compressive strength of the concrete model during the curing period was tested to study the correlation between the resistivity, polarizability and compressive strength of the concrete model. The results show that the resistivity, polarizability and compressive strength of concrete are closely related to the type and concentration of ions. There is a corresponding relationship between the polarizability and the bearing capacity of concrete test blocks mixed with the same solution. The larger the polarizability, the weaker the bearing capacity. There is no strong correlation between resistivity and bearing capacity. Polarizability data can reflect both ion invasion and strength change of concrete.
Effects of AlN and rare earth fluorides on the thermal conductivity of SiC ceramics with impedance spectroscopy analysis
Authors: Li Jingren , Lu Wenzhong 
Published: September 2021

Abstract
Dense silicon carbide (SiC) ceramics were fabricated through hot-pressing with an innovative additive combination of AlN and rare earth fluorides (ReF3, Re= La, Nd and Gd). Effects of these additives on the microstructure, phase composition and thermal conductivity of SiC ceramics were evaluated. All samples showed compact microstructures, high densities and clean grain boundaries without visible secondary phases. Sample sintered with 4 wt%AlN and 1 wt%NdF3 (4A1Nd sample) exhibited the highest thermal conductivity (152.3W/m·K) amongst all. Impedance spectroscopy analysis was employed to associate with the thermal conductivity variations in different samples by analyzing defects and impurities. 4A1Nd sample exhibited the highest fitting grain and grain boundary resistances among all samples, indicated its lowest concentration of

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vacancies and impurities, which suggested the best impurity purifying ability of AlN and NdF3 combination. On the contrary, the sample sintered with 4 wt%AlN (4A sample) exhibited a higher concentration of defects than other ReF3 added samples. Therefore, the AlN-ReF3 additive combinations are promising in both tailoring and improving the thermal conductivity of SiC ceramics.
Nonequilibrium behavior of polymer nano films cast from different solvents
Authors: Fan Xiao , Ma Jinghong , Ma Yu 
Published: September 2021

Abstract
Properties of materials are largely determined by the processing conditions. This is especially true of polymers, which typically have much longer relaxation times than processing times and therefore possess out-of-equilibrium chain conformations. Here, we demonstrate that the nonequilibrium behavior of polymer nano films can be tuned by controlling the processing pathways. Films cast from different quality of solvents were aged at room temperature for various times, and then carried out the dewetting experiment above the glass transition temperature. The residual stress and relaxation time strongly depend on the quality of the solvents, and the differences may be caused by the boiling point and interaction parameter. This work offered a pathway for preparing a stable nano film, which is crucial for the durability of nanomaterials and devices.
Catalytic reduction of 4-Nitrophenol using CoPt nanoparticles on the reduced graphene oxide layer nanocomposite catalyst
Authors: Zhang Xiaolong , Duan Qian 
Published: September 2021

Abstract
The reduced graphene oxide (rGO) supported CoPt nanoparticles nanocomposite catalyst has been preparation by a facile method. The XRD and TEM results show that the CoPt nanoparticles were successfully loaded onto the rGO layer. The apparent rate constant (k) is about 0.167 min-1. The rGO/CoPt nanocomposite catalyst exhibits excellent catalytic performance for catalytic reduction of 4-nitrophenol. Moreover, the magnetic result shows that the rGO/CoPt nanocomposite is superpara-magnetism.
Controllable plasmonic nanostructures induced by ultraviolet laser
Authors: Li Dongfang , Yuan Yanping , Wang Chunlian , Chen Jimin 
Published: September 2021

Abstract
The plasmonic resonance express as strong extinction band and great enhancement of the electromagnetic field in the vicinity of the nanoparticles, which have been exploited in various applications such as data storage, super-resolution imaging, light collimation, solar cells, biosensors and absorbers. However, a simple and effective route to obtain uniform metal nanoparticles is still a challenge. Here, we have demonstrated a cost-efficient, lithography-free, and facile methods to obtain controllable gold nanoparticles (GNPs) for structure color by direct ultraviolet (UV) laser writing. The thermals dewetting process realized by UV laser direct writing, greatly simplifies the manufacturing process of plasmonic nanoparticles, lowers the bar for equipment, and realizes the structure color in selected areas. The direct laser writing process is performed on a 4 nm-thin island-like Au films atop dielectric-metal sandwiches. By local laser heating, the semi-continue gold film merges and reshapes into approximately spherical structure, generating brand colors. The structure color changes as a function of the laser energy density, low laser energy density to green and high laser energy density to red. Especially for lager laser energy density, the processed area shows a high saturation Numerical simulations confirm that the reflectance of the processed area is strongly affected by the absorption of the bottom metal layer and the local surface plasmon resonance of the top GNPs. In addition, the top GNPs play a major role in tunning the peak of reflection spectrum.
An Exploration on Mechanisms of Andrographolide Nanoemulsifying in Treating Gastric Cancer Based on Network Pharmacology
Authors: Chen Ting , Huang Xulong , Zheng Kaimin , Zhong Jinping , Huang Bin 
Published: September 2021

Abstract
This article preliminarily revealed the mechanism of andrographolide (AD) nanoemulsifying inhibiting gastric cancer(GC). The targets of AD was searched by TCMSP and SwissTargetPrediction database, we entered the keyword “Gastric Cancer” in GeneCards database to find all targets related to GC. The intersection of AD and GC is taken as an important targets for AD to act on GC, Cytoscape 3.7.1 was used for topological analysis of the target, so as to obtain all important targets for AD to inhibit GC. DAVID database was used to perform biological process analysis on all potential targets, mainly through its analysis function. It involves Cell composition, molecular function and signal pathway enrichment analysis. Finally, we obtained a total of 53 potential targets related to GC, among which IL6, MAPK8, CREBBP, CDK2, MAPK14, AR and MAP2K1 may be important targets for inhibiting GC. The effect of AD on GC is mainly through Influenza A, Pathways in cancer, Sphingolipid signaling pathway, Progesterone-mediated oocyte maturation, Herpes simplex infection and other important pathways which are closely related to 10 biological processes such as protein phosphorylation, signal transduction, peptidyl-serine phosphorylation, positive regulation of gene expression, and positive regulation of transcription from RNA polymerase II promoter Sex. This study can provide guidance for the development of anti-GC drugs.
The elastic modulus reduction method for upper bound limit analysis of pressure vessels incorporating material strain hardening effect
Authors: Zhang Yang , Liu Jingmin , Yang Yanyan 
Published: September 2021

Abstract
Pressure vessel is a kind of special equipment which is involved in various industries. Once it is damaged, it will cause great loss to people’s life and property. The traditional elastic modulus reduction method for upper bound limit analysis of pressure vessels adopts the elastic-perfectly plastic material model. This method will result in waste of materials without considering the material strain hardening effect. So the material strain hardening effect is introduced into upper bound limit analysis. Firstly, the equivalent yield strength considering material strain hardening effect is established. Then, the formula of limit load multiplier which is expressed by the equivalent yield strength is derived based on the upper bound theorem. Combined with the strategy for elastic modulus adjustment, the elastic modulus reduction method for upper bound limit analysis of pressure vessels incorporating material strain hardening effect is constructed. The limitation of the elastic-perfectly plastic model for the upper bound analysis method is eliminated by the method proposed in this paper. The result calculated by this method is closer to the true limit load of pressure vessels.
Changes in the Spectral Characteristics of Hydrophilic Fraction in Compost Organic Matter
Authors: Zilong Zhang , Yu Xiao 
Published: September 2021

Abstract
The hydrophilic fraction (HyI) is one of the important components of humus, and its structure and composition are important factors for evaluating the stability and maturity of compost. This study used spectroscopy to analyze the composition and structure of HyI. The results showed that with the passage of composting time, the UV–Vis curve had a red shift, indicating that the conjugated structure of the substance increased and the aromaticity is enhanced. The three-dimensional fluorescence excitation–emission spectrum (3D-EEM) showed that the fluorescence intensity of humus-like substances in HYI was significantly enhanced, and microbial metabolites such as protein-like substances, carbohydrates and other small molecules were continuously degraded, and the relative content decreased from 21% to 8%, the humus-like substances rose from 54% to 68%, which showed that the organic matter in the compost is continuously condensing and polymerizing, and the maturity and stability of the compost product are deepened.
Parameters Extraction Methods of Compound Semiconductor Photovoltaic Modules
Authors: Zhou Chuxiang , Wang Yu , Xu Jie 
Published: September 2021

Abstract
The parameters extraction method of the single diode model is usually used to analyse silicon-based solar cells to predict their behaviour from IV curves. However, the film solar cells based on compound semiconductor, for example the CdTe and CIGS, which have been widely used in the market, have few relevant studies still now. This paper presents two parameters extraction methods and applies to two photovoltaic modules, then we use a function in MATLAB to refine the results. Finally, the error of the two methods has been compared to find the best fitting result. Final fitting results show that these methods have their own advantages and disadvantages and both have great fitting accuracy on the two modules, and they can be used in various irradiance conditions.
Study on the characteristics of V2O5-WO3/TiO2 denitration catalyzer synergistic mercury removal
Authors: Zhiyong LU , Litao QU 
Published: September 2021

Abstract
Ti-V1W9 catalyzer obtained the best 68.18 % elemental mercury (Hg0) oxidation efficiency at the temperature of 250 °C, The elemental mercury (Hg0) oxidation efficiency can be maintained above 60 % in the reaction temperature range of 250-350 °C, indicating that V2O5-WO3/TiO2catalyzer has certain oxidizing ability to elemental mercury (Hg0); SO2 inhibits Ti-V1W9catalyzer’s ability to oxidize elemental mercury (Hg0), and the toxicity of Ti-V1W9 catalyzer cannot be reversed to some extent; O2 has a very obvious promoting effect on the oxidation performance of Ti-V1W9catalyzerelemental mercury(Hg0). Increasing the concentration of O2 can significantly improve the elemental mercury(Hg0) oxidation efficiency; Low concentration of NO contributes to the adsorption oxidation of elemental mercury (Hg0) by Ti-V1W9 catalyzer, while high concentration of NO significantly inhibits oxidation of elemental mercury (Hg0); NH3 inhibits the adsorption and oxidation of elemental mercury (Hg0) on the surface of catalyst; H2O(g) has very obvious inhibitory effect on elemental mercury (Hg0) adsorption oxidation.
Three-layer structure hot bending/diffusion bonding process of reactive sintering Ti-22Al-25Nb alloy and its load response at high temperature
Authors: Long-hai YU , Yuan-xin Wang 
Published: September 2021

Abstract
Three-layer structure part as a ideal structure part, that had light weight and enough strength to be widely used, was prepared combining hot bending and diffusion bonding processes in this paper. The Ti-22Al-25Nb sintered alloy that owned better using temperature was applied to manufacture three-layer structure part. The forming processes of manufacturing three-layer structure was divided into hot bending forming of the core sheet and diffusion bonding of three layers sheets. Firstly, the hot bending of core sheet was performed at 1423K for 10MPa in a vacuum furnace. Secondly, the diffusion bonding of three layers sheets was carried out at 1473K for 120min and 10MPa. Furthermore, in order to evaluate the quality and performances of three-layer structure, the microstructure of bonding joint of three layers sheets was analyzed by SEM, and the properties of three-layer structure part were tested at 1073K by compressing test and three-point bending test. Compressing load and compressing strength were 9014N and 10MPa, respectively. Bending strength was up to 54MPa. In addition, the experimental results also indicated that three-layer structure that prepared using the Ti-22Al-25Nb sintered alloy owned good properties.
Study of structure and electrochemical properties of Fe-doped carbon aerogels
Authors: Wang Shasha , Ren Bin , Zhang Lihui , Liu Zhenfa 
Published: September 2021

Abstract
A nanocomposite material CAFe was obtained by assembling of Fe and carbon aerogels. The physical characterizations of CAFe were compared using XRD, Raman, XPS, and SEM. The results showed that Fe was successfully loaded onto carbon aerogels. The results of the electrochemical performance revealed CAFe exhibited high specific capacitance (78.7 F g-1) and excellent stability. Therefore, Fe-doped carbon aerogel is a good electrode material.
Research on capacity degradation and aging state estimation of lithium-ion battery
Authors: Li Xu , Zhang Qi , Yang Bowen , Wang Dafang , Cui Shengmin 
Published: September 2021

Abstract
The aging state estimation of the power battery is very important for the battery management system (BMS). Regular estimation of the battery’ state of health (SOH) can improve the service life of electric vehicles. The reasons for the aging of lithium-ion battery are briefly introduced in this paper. What’s more, the estimation methods of battery aging state are summarized and described from both the model-based and data-driven aspects.
Properties of carbon-doped GaN using isobutane as a dopant
Authors: Li Xun , Zhu Songran 
Published: September 2021

Abstract
Carbon doping is an effective method to obtain semi-insulating GaN buffer, which is a necessity to prevent current leakage, in the high-electron-mobility-transistor device structure. The properties of intentionally carbon-doped GaN using isobutane gas as a dopant has been studied in detail. The carbon incorporation efficiency has been measured by secondary ion mass spectrometry. It is found that the carbon concentration could be directly controlled by the flow rate of isobutane precursor. The surface morphology of carbon-doped gallium nitride epitaxial layers has been investigated by optical microscopy and atomic force microscopy. The growth mode of GaN layers changes from step-flow to island growth, when the incorporated carbon concentration is higher than 1×1019 cm-3. In order to evaluate the structural quality of intentionally carbon-doped GaN, the full-width-at-half-maximum values are extracted from the rocking curves in six different reflections measured by high resolution X-ray diffraction. Raman spectroscopy is utilized to evaluate the physical properties of the carbon-doped GaN epitaxial layer.
Research on the Anode Protection of Lithium
Authors: Tao Chen , Jingze Li , Hongli Liu , Jianjian Shi 
Published: September 2021

Abstract
The anode of Lithium serves as the most ideal substitute for graphite anode. However, uncontrolled growth of lithium dendrite brings about service life and safety problems, which limit its commercial application. According to the thermodynamic and kinetic factors of lithium dendrite growth, many strategies have been proposed to inhibit the growth of lithium dendrite, such as structural composite lithium metal anode, optimizing SEI film, using solid electrolyte, etc. This paper reviewed the development process of different strategies, and analyzed their advantages and limitations, looking forward to the possible direction of inhibiting the growth of lithium dendrite.
The photoelectric conversion enhancement of p-Cu2O/n-ZnO heterojunction by deposition temperature
Authors: Niu Jingjing , Pan Jiaqi , Fu Wendi , Li Chaorong 
Published: September 2021

Abstract
Dense ZnO films were prepared by RF magnetron sputtering, and PN junctions were formed with Cu2O films prepared at different deposition temperatures. Different characterization methods show that the PN junction has better transmittance. Compared with the unheated Cu2O, the Cu2O / ZnO PN junction formed by the heated Cu2O film shows obvious enhancement of photoelectric properties, which can be attributed to that the improved film crystallinity with the increased sputtering substrate temperature, can reduce the corresponding defects in the film.