bluuebunny/crossref_metadata_2025_split huggingface dataset:
Laser Surface Remelting of AISI 4140 Steel
Authors: Zhao Lirun , Hu Zengrong , Wang Xiaonan , Chen Xiaming , Huan Pengcheng , Zhang Hai 
Published: March 2020

Abstract
In order to improve the surface wear resistance and hardness, laser remelting was used to process AISI 4140 steel. The microstructure and the Vickers hardness of surface and cross-section of those samples were studied. The results shown the laser power was one of the most important facts, which affect the enhanced hardness and microstructure. After laser remelting, the the grain size of the sample surface was refined, and the hardness of the melted surface of AISI 4140 was improved. Compared to the base material it has about 313% incensement for samples processed with 130 W. It enhances the comprehensive mechanical properties dramatically.
Biocompatible Swelling Textile Structure Reinforced Hydrogels with High Toughness and Stiffness
Authors: Wang Ling , Wang Jilong , Shen Hua 
Published: March 2020

Abstract
In the present work, a toughness hydrogel was manufactured by introducing kapok/PET assembly into single network of polyacrylamide hydrogels. The textile reinforced hydrogels (TRH) exhibits apparently higher young modulus than PAAM hydrogel. The normal strength of TRH was six-times higher than that of PAAM hydrogel when it was compressed at 40%. In addition, the swelling ability of TRH in x-y planar direction was largely suppressed, with only a 6.25% increase in the edge length. It was significantly lower than the swelling ability of PAAM hydrogel, which was high to 62.5%. While in the z direction, the swelling ability of TRH was much improved if compared with that of PAAM hydrogel, indicating the anisotropy in swelling properties of TRH. Besides, although the solution absorption ability of TRH was clearly decreased because of the suppress of kapok/PET assembly, the TRH and PAAM hydrogel depicted approximately the same swelling behaviour in the initial 8 hours of absorption from totally dry state.
The Doping of Mineral Additions SF, FA and SL on Sulfate Corrosion Resistance of the HIPC Cements
Authors: Chen Ping , Tian Yu , Hu Cheng , Zhang Xiaoping 
Published: March 2020

Abstract
To prepare highly durable cement concrete for marine infrastructure, the effect of silicon powder (SF), fly ash (FA) and mineral powder (SL) on sulfate corrosion resistance of the high iron and low calcium portland cement (HIPC) were studied. In this paper, a series of experiments were carried out using HIPC cements as the raw material and 20 °C, 5% Na2SO4 solution as the conservation environment. The effect on the sulfate resistance of the system is determined by analysing the mechanical properties of the sample and measuring the corrosion resistance coefficient K to characterize the system’s resistance to corrosion. The results show that the anti-erosion coefficient of HIPC systems with different mineral admixtures has been enhanced to varying degrees, among which the optimal amount of SF is 3%; the optimal amount of SL is 40%; the optimal amount of FA 20%.
Study on Preparation and Properties of Polyurethane-Based AlN Potting Compounds
Authors: Li Nianhua , Liu Jiping , Liu Xiaobo , Yang Weiwei , Song Kunpeng , Li Xueli 
Published: March 2020

Abstract
Polyurethane (PU) is a widely used polymer material. Adhesives prepared with polyurethane as the base material can bond a variety of materials and have excellent performance. In the electronic packaging industry, the potting compounds prepared by using polyurethane as the base material and aluminum nitride powder as the thermally conductive filler has excellent thermal conductivity, which adapt to the increasingly miniaturization and high integration requirements of integrated circuits, and can dissipate the heat generated by components in time, which can keep the device in the best state during using and keep its efficiency and stability. With the continuous development of the microelectronics industry, the advantages of potting compounds with excellent thermal conductivity in the market will become more and more obvious.
Electroplating Wastewater Treatment Method and Development Trend Analysis
Authors: Lu Bing-Jie , Wu Ke 
Published: March 2020

Abstract
Electroplating wastewater is a highly hazardous industrial wastewater with complex composition. For the treatment of electroplating wastewater, the traditional treatment methods include chemical treatment and membrane treatment. According to the requirements of electroplating wastewater treatment and industrial wastewater treatment in recent years, traditional electroplating wastewater treatment technology is difficult to reach new emission standards. The “zero emission” technology of electroplating wastewater has gradually become a new goal of ecological civilization construction. This article starts discussion from this aspect.
Electromagnetically Induced Transparency in All-Dielectric Metamaterial of Bi-layer Asymmetric Bars
Authors: Wang Ziyu , Bai Lei , Shao Jian , Tang Lili , Zhou Xuetong 
Published: March 2020

Abstract
The authors demonstrate the all-dielectric-metamaterials-based electromagnetically induced transparency with low loss and high quality (Q) factor. The all-dielectric metamaterial is made up of bi-layer silicon bars. A transparency window is observed by the coupled the bright and dark modes when the asymmetry is introduced. Compared with metallic metamaterials, it avoids of the loss of ohmic damping, so that the Q factor and the window transmittance can reach 1864 and 96%, respectively.
Precipitation Process Optimization Research on Zinc-Based Electrode Materials Synthesis
Authors: Wang Jianhai , Yang Yubin , Yu Yue , Zhu Shaomin , Xu Bing 
Published: March 2020

AbstractOptimization of electrode material is one of the most important measures to improve the performance of supercapacitors. Layered double hydroxide electrode materials supported by foam Ni were synthesized by in situ hydrothermal synthesis with CO(NH2)2/NaOH/Na2CO3as precipitants and inorganic Zn(II) and Al(III) as precursors. The catalytic layer is composed of Zn6Al2(OH)16CO3·4H2O and Zn4(OH)6CO3·H2O. Specific capacitance of the electrode materials can reach as high as 1259 F g−1at 1.0 A g−1. Urea in precipitants optimized the composition, structure, and properties of the electrode materials. These encouraging results make these low-cost and eco-friendly materials promising for supercapacitor applications.
Experimental Research of Mechanical Behaviour of GFRP Cross Arm of 500kV Transmission Tower
Authors: Wu Kunpeng , You Qiang , Gu Xin , Peng Yiliang 
Published: March 2020

Abstract
Glass fibre reinforced polymer (GFRP) material is used in the field of transmission tower structure because of its excellent electrical and structural performance. In this paper, a full scale GFRP composite cross arm of 500kV transmission tower is designed and a triaxial load-unload experiment is conducted to study the mechanical properties of it. Three kinds of the most unfavourable load cases of GFRP cross arm are loaded, and the strain changes of the upper, middle and lower parts of the cross arm are obtained. It is verified that the bearing capacity of GFRP cross arm meet the design requirements and GFRP cross arm can be used safely in the transmission tower engineering.
Study on the Wear of the UB Hanging Plate of the Ground Wire Suspension String Clamp in the Continuous Stable Wind Area
Authors: You Yi , He Cheng , Zhang Ling , Jiang Shihao , Fang Sheng , Wei Yanding 
Published: March 2020

Abstract
This study focuses on the common wear phenomena on the side of the UB hanging plate of the suspension string clamp in the continuous stable wind area. The force models of the suspension string considering the wind load in three wind speed stages are established, and the formulas for calculating the gravity load and the wind load of the wire are developed, and the expression of the relationship between the contact point pressure (the contact point between the connecting angle steel and the deflected UB hanging plate) and the wind speed and the icing thickness is derived. The results show that the installation clearance between the connecting angle steel and the UB hanging plate is the main structural factor for the wear phenomena, and the side of the UB hanging plate will contact and wear with the connecting angle steel when the wind speed is greater than the critical wind speed. The contact force between the UB hanging plate and the connecting angle steel increases with the increase of the icing thickness, the span and the wind speed, and the influence of the icing thickness on this contact force is more obvious in the case of the occasion with large span and strong wind. This study evaluates the three factors of span, icing thickness and wind speed, which is of guiding significance for the structural optimization of the suspension string in the future.
Experimental Investigation of Interactions between Double Oblique Cracks on Crack Growth Behaviours under the Fatigue Loading
Authors: Han Zhichao , Qian Caifu , Li Huifang 
Published: March 2020

Abstract
In this paper, the interaction of double oblique cracks is researched experimentally and numerally. Fatigue crack growth tests of both the single crack and double crack specimens are conducted to investigate the effect of crack interactions on fatigue crack growth behaviours. Results indicate that the oblique crack has a shielding effect on the crack growth length of the dominant crack. In addition, numerical simulations show that the stress intensity factors at the dominant crack tips in the double crack specimens are smaller than those at the crack tips in the single crack specimens, which explains why the growth length of the dominant crack decreases in the present of the oblique crack.
Buckling Analyses of Functionally Graded Graphene Nanoplatelets Reinforced Nonlocal Piezoelectric Microplate
Authors: Lu H M , Zhang W , Mao J J 
Published: March 2020

Abstract
This paper analyses the buckling characters of a multi-layered functionally graded graphene nanoplatelets reinforced nonlocal piezoelectric (FG-GRNP) microplate. The FGGRNP microplate is acted by the in-plane axial force and external potential. Graphene nanoplatelets are assumed to dispersing parallel in each layer of the FG-GRNP microplate, but it is distributed graded along the thickness direction. The rule of mixture and Halpin-Tsai parallel model are used to calculate the properties of the FG-GRNP microplate. The governing equations of buckling behaviors the FG-GRNP microplate are derived by nonlocal elastic theory, minimum potential energy principle and first-order shear deformation plate theory. The differential quadrature (DQ) method is adopted to solve the eigenvalue equations. The effects of the axial forces, piezoelectric multiple, nonlocal parameter, external voltage, characteristics of graphene nanoplatelets on the critical buckling load of the FG-GRNP microplate are studied.
Development of Rehabilitation Training Gloves Based on Flexible Robot Technology
Authors: Guo Kai , Zhao Shasha , Liu Bin , Liu Yongfeng , Yang Hongbo , Li Zhenlan 
Published: March 2020

Abstract
This paper develops an intelligent sports rehabilitation glove based on flexible robot technology. Designed for sports rehabilitation gloves through the rational design of flexible pressure sensing systems, micro-precision drives, intelligent control systems, and ergonomic gloves. Through the use of flexible lasso transmission, rehabilitation training is performed on the patient’s hand, and the endurance and endurance of the wearer’s daily life are enhanced. This paper combines the latest flexible sensing technology, intelligent control technology, and micro-precision driving technology with the advanced concepts and methods of sports medicine. Through the combination of medical and industrial research, it has developed low cost, comfortable wearing, convenient and practical, and can meet families, hospitals, and Wearable smart rehabilitation gloves for use in industries such as industry.
Design and Application of γ-aminobutyric Acid Nano-Fluorescent Probe
Authors: Hu Qiao , Pang Yutong , Shi Yuxin , Yang Ke , Liao Xiaoling , Liu Xue 
Published: March 2020

Abstract
The design and development of nano-fluorescent probes is a research hotspot in the field of biological functional materials. The construction of γ-aminobutyric acid (GABA) fluorescent probe based on fluorescence resonance energy transfer (FRET) technology will become a new tool for bacterial screening. Recombinant plasmids suitable for prokaryotic expression were constructed by subcloning technology, and verified by agarose gel electrophoresis and sequencing. The target protein was expressed in BL21 E. coli and purified by nickel matrix affinity chromatography. Spectroscopy and fluorescence imaging validate probe function and evaluate bacteria’s environmental adaptability. The results showed that a recombinant plasmid suitable for efficient and stable expression of prokaryotes was successfully constructed. The release of GABA will cause changes in fluorescence intensity. The probe can evaluate the metabolic activity and adaptability of bacteria to different environments. This method uses bacteria’s metabolic activity to realize the selection of bacteria. The sample does not require special biochemical treatment. Compared with traditional evaluation methods by counting the number of bacteria and analyzing metabolite, it is a more convenient tool for screening and evaluation of bacteria strains.
Preparation and Characterization of Conductive Chitosan/Polypyrrole Composites for Neural Repair
Authors: Shi Yuxin , Hu Qiao , Wang Song , Zhu Xu , Gong Chen , Liao Xiaoling , Liu Xue 
Published: March 2020

Abstract
Electrical stimulation showed ability to promote the proliferation and differentiation of neurons. Thus, conducting polymers such as chitosan/polypyrrole (CS/PPY) composites can be a potential material for neural repair. To improve the preparation processes and biological activity of CS/PPY composites, a novel “one step” method was proposed in the present study. Polypyrrole (PPY) nanoparticles were synthesized in chitosan (CS) solution directly. FeCl3 was used as the oxidant and dopant with a mole ratio of 4:1 to pyrrole (PY). In the Fourier Transform infrared spectroscopy (FT-IR) spectrum of CS/PPY, the two bands at 1544 cm−1 and 1040 cm−1 are characteristic PPY peaks. The scanning electron microscope (SEM) results showed that the PPY nanoparticles were distributed uniformly in CS films. When the weight ratio of PY to CS was 20%, the conductivity of the composite films was 0.51 mS/cm. The CS/PPY film adsorbed more protein than the pure CS film. The results of cell viability assay showed that the composite had good biocompatibility with PC-12 cells. The “one step” method can improve the preparation processes of CS/PPY composites and provide a promising potential material for neural tissue engineering.
A Dummy-Pattern-Assisted Lift-Off Method for Small and Dense Nanostructures
Authors: Duan Tianli , Xu Kang , Wang Yao , Ma Xuhang , Zhang Rui , Gu Chengjie 
Published: March 2020

Abstract
Nanostructures have attracted much attention because of wide application. Moreover, most of the nanostructures play the function through small and dense patterns in irregular shape, which indicates that the fabrication process is utmost important. In general, a lift-off process is used to transfer the pattern from resist to substrate. However, for small and dense patterns, the lift-off does not work well. In this paper, a dummy-pattern-assisted lift-off method is present. With added dummy patterns, a deep and thin valley forms on the resist but does not contact the substrate. The following deposited metal film may not fully cover the valley or form a weak connection in the valley. Therefore, the metal film is easily lifted off in the valley when the sample is dipped in the acetone, which could result in a successful lift-off. This novelty method is able to improve the quality of nanofabrication by lift-off process.
The Fabrication of Micro-/Nano-Structural Antirefraction Coatings Based on the PDMS Film for Solar Cells Application
Authors: Liu Siyuan , Zhang Yaoju , Wu Zeping , Zhou Bochuan , Fang Chaolong 
Published: March 2020

Abstract
A simple and low-cost methodology to fabricate micro/nanostructure anti-refraction coatings (ARCs) of solar cells is introduced. The nanostructure ARCs are generated by O2 Plasma surface modification technique for a flexible polydimethylsiloxane (PDMS) polymeric film, the microstructure ARCs are obtained by soft imprint lithography, and the micro-nano complex structure PDMS ARCs are fabricated by soft imprint lithography technique combined with surface modification technique. The measured results show that these PDMS ARCs can decrease reflection loss of light from the solar cells and increase the solar cells photovoltaic conversion efficiency.
Dependency of Statistical Correlation between Ply Elastic Properties of FRP
Authors: Xu Dong , Huang Jine , Zhang Yang , Cheng Hongwei , Zhang Shufeng 
Published: March 2020

Abstract
Statistical correlation between ply (or lamina) mechanical properties is recently recognized as an important factor in composite structure reliability evaluation. This work provides a sensitivity analysis of stochastic variation of ply elastic properties to constitutional material (microscale) properties to reveal essential causes of the statistical correlation. Relationship between linear correlation coefficients of ply elastic properties and microscale uncertainty is derived. It is shown that if the microscale uncertainty is dominated by the uncertainty of FVR, there would be great statistical correlation between all ply in-plane elastic properties for both unidirectional and plain-weave fibre reinforced composite. Statistical correlation between ply elastic properties of plain-weave fibre reinforced composite additionally depends on the uncertainty level of unit-cell geometry.
Strain Sensing Properties of Graphene/Elastic Fabric
Authors: Bustami Shaun Bayazid , Cai Runxuan , Sun Xiaojiang , Huang Chaokun , Bi Shuguang , Ran Jianhua 
Published: March 2020

Abstract
The smart fabric is a new material that began to develop in the 1990s, and on the basis of the nature and function of original material, it joined the features of intelligent perception. On the performance, intelligent fiber can sense the changes of heat, light, chemistry, mechanical, temperature, and electromagnetic, then react accordingly. For smart textiles, the sensor is the core part, now most commonly used micro/nano strain sensor are using silicon and zinc oxide and others inorganic as main material. But inorganic materials have limited deformation ability, once deformation occurs, the sensor will be strictly damaged. So, the development of flexible, high sensitivity, wide range of strain of the flexible intelligent fiber strain sensor has a very important application prospect. For the stretch-able sensor, the prepared conductive material must be placed on the substrate of the flexible polymer. In this paper, graphene is used as conductive material to construct an orderly conductive layer. Waterborne polyurethane was used as dispersant and adhesive, then strengthen the interface between the layer of conductive material and elastic fabric binding force, and finally prepare a kind of high sensitivity, wide strain range, stable performance and high elastic intelligent fibers.
Anti-solvent Engineering for Efficient Perovskite Solar Cell Using PVK as Hole-Transporting Layer
Authors: Wu Shuanghong , Wang Haoyu , Wang Xiangru 
Published: March 2020

Abstract
Perovskite solar cells were studied using PVK as hole-transporting layer and different anti-solvent process. We have fabricated CH3NH3PbI3 (MAPbI3) photoactive layer using chlorobenzene (CB) solution and PVK in CB solution as the anti-solvent solution, respectively. The results show that the power conversion efficiency is enhanced to 14.7% by using 2.5 mg/mL PVK in CB solution as the anti-solvent, which is significantly improved compared with 12.85% for the device treated using CB. PVK in CB as the anti-solvent solution facilitates the hole transport for MAPbI3/PVK heterojuction as well as good crystallinity and less PbI2 residues in MAPbI3 photoactive layer.
Effect of Temperature on the Dispersion of Graphene in Graphene Reinforced Aluminum Matrix Composite
Authors: Wang Qiang , Sun Qingze , Chen Shengyong 
Published: March 2020

Abstract
The influence of hot pressing temperature on the dispersion of graphene (GR) in GR reinforced aluminum matrix composites was investigate. The microstructures of the sample were observed by optical microscope, scanning electron microscopy and energy dispersion spectrum, respectively. The temperature is hold at 640-750°C, and the interval is 10°C. The results show that GR is mainly distributed at the grain boundary at 640 °C. And GR is dispersed in the aluminum matrix, without obvious agglomeration at the temperature from 670 °C to 680 °C. However, GR is agglomerated in the aluminum matrix and has obvious regional differentiation at 690-750 °C, in which the concentrated area of GR is in the middle of the sample, and the dilution area in the rest.
Development and Application of Electromagnetic Shielding Material with Silicone Rubber Graphene Structure
Authors: Zheng Yongli , Zhao Yueju , Du Jing , Teng Jilin , Xu Shanjun , Lu Lu 
Published: March 2020

Abstract
A new kind electromagnetic shielding material with silicone rubber graphene structure was developed and evaluated. The silicone rubber compound material was prepared by vinyl silicone oil, hydrosilicone oil and compound coupling agent. It was made into 1-3 mm silicone rubber sheet by calendering process, and its dielectric strength, leakage resistance and mechanical properties were investigated. The graphene was modified to form graphene modified slurry, and the adhesive was introduced to disperse the graphene slurry. The initial electromagnetic shielding effectiveness, tensile strength and dielectric strength of this material are 82 dbm, 6.5 MPa and 25.3 kv/mm, respectively. The results from ultraviolet and thermal aging tests show that the intercalation between silicone rubber and graphene is stable and this material has good aging resistance. This newly developed electromagnetic shielding materials can meet the requirements of external insulation and electromagnetic shielding for field maintenance operation robots.
Study on Soil Properties of an Erosion Gully in Yanghe Basin in China
Authors: You Qinjing , Zheng Yuyang , Wu Xuanwen , Zhou Wenjiao , Zhang Feifan , Zhang Huayong 
Published: March 2020

Abstract
Controlling erosion gully caused by soil and water erosion is an important content of ecological restoration. In order to better allocate soil and water loss control measures, the total nitrogen content and water content in the surface soil of gully were analyzed by taking typical erosion gully in Yanghe basin as the research area. The results show that the erosion gully surface soil total nitrogen content was 0.215-1.459 g/kg, saturated moisture content ranged in 35-44%, and the permeability was between 0.0975-0.2925 mm/min. Combined with actual investigation and the experimental results, we conclude that the total nitrogen content and water content of the surface soil in the erosion gully are greatly affected by climate and vegetation conditions.