bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis on Self-healing Properties of Membrane
Authors: Wang Shixi 
Published: November 2020

Abstract
Due to special compositions and structures, polymer membrane materials usually show a variety of excellent functions. However, the hardness of polymer materials are much lower than inorganic materials, so they are easy to suffer external damage in the process of use. The damaged polymer material will lose its original function and become unable to continue to use, which will have a serious impact on our production and life. Therefore, it is one of the most effective methods to extend the service life and improve the functional reliability of polymer functional materials to endue them with self-healing properties. In this paper, the principle, classification and research results of self-healing membrane are introduced. In particular, this paper explores the application of microcapsule self-healing technology in membrane field, conclude the influence of various components of microcapsule self-healing technology on membrane properties, and discuss the self-healing technology of cellulose membrane and polyethersulfone membrane. In addition, the author also pointed out the development direction of self-healing technique in membrane field.
Study on the Cutting Surface Formation Mechanism of TA2 and TC4
Authors: Nie Cong , Liu Gui-Zhong 
Published: November 2020

Abstract
High speed machining of titanium and titanium alloy is an important and fundamental research topic in the field of machining. In this paper, the cutting experiments of commercial pure titanium TA2 and titanium alloy TC4 were carried out at different speeds. We used roughness measuring instrument and scanning electron microscope (SEM) to observe and analyze the cutting surface and particularly analyzed its roughness and microstructure characteristics under different cutting speeds. The experimental results show that in the cutting process, when the cutting speed of TA2 is higher than 79.13m/min, the surface roughness is reduced, the influence depth of extrusion and dislocation becomes shallow, and good surface quality is obtained; when the cutting speed of TC4 is close to 79.13m/min, the surface roughness is reduced, the influence depth of extrusion and dislocation becomes shallow, and good surface quality is obtained. At the same cutting speed, the surface roughness of TC4 is less than TA2, and the influence depth is also less than TA2, so Titanium alloy TC4 is easier to get good surface quality.
The Dripping Behaviors of PE Metal Sandwich Panel Insulation material at Different Powers
Authors: Fan Yinke , Zhou Ru 
Published: November 2020

Abstract
An experimental study on the characteristics of molten drop and flame spread of metal polyethylene (PE) cladding panel is presented. The parameters investigated include mass loss rate, the mass of the melting part and the average flame height. The effects of fire source power on the flame spread and melt drop are studied. The results show that the sandwich panel combustion can be divided into the surface of the sandwich panel and the dripping combustion. With the increase of power,the time interval between melting drops becomes smaller and the flame pulsation frequency increases. which causes the temperature change range getting larger, the mass loss rate and mass of the melting part and the average flame height increase under all conditions. The mass loss rate and the area of combustion of the metal sandwich panel depend on the degree of surface burning. There is a certain relationship between oil pool fire average flame height, and the distance between sample and the oil pan(D). It is found that when D ≤ 1.4m, with the rise of D. oil pool fire average flame height decreases. However, when D ≥ 1.4m, the fire flame intensity of the oil pool is determined by the number of extinguished droplets before the drops hit the oil pan, and the flame parameters of the oil pool are basically stable. The influence mechanism and law of oil pool fire burning of PE metal sandwich panel insulation materials are revealed.
Effect of nitrate nitrogen content on properties of modified single-base propellant
Authors: Zhang Haotian , Xu Bin , Liu Zhitao , Liao Xin 
Published: November 2020

Abstract
In order to investigate the effect of nitrocellulose (NC) nitrogen on the performance of modified single-base propellants, modified single base propellants with different nitrogen content (12.8%, 12.7%, 12.6%, 12.4%) were prepared by solvent extrusion. The mechanical properties of the modified single-base propellant were tested using a universal material testing machine and a simply supported beam impact tester; the impact section was observed by a scanning electron microscope; and the combustion performance of the modified single-base propellant was tested by a closed explosive device test. The results showed that the higher the nitrogen content of nitrocellulose, the worse the swelling effect, the worse the cotton’s dissolving ability, and the worse the mechanical properties of modified single-base propellant; as the nitrogen content increases, the burning rate and force capacity of the propellant gradually increase.
Lightweight Design of Vertical Lathe Bed for Repairing Wheel based on ANSYS Workbench
Authors: Zhang Qingping , Zhang Jianhua 
Published: November 2020

Abstract
The casting bed of vertical lathe for repairing wheel hub is optimized to realize the lightweight design. The optimal selection scheme is optimized to improve the first natural frequency and reduce weight. Multi-objective genetic algorithm is based on the general algorithm of genetic algorithm to solve the problem. The five important dimensions of the bed structure are multi-objective optimized to determine the best optimization scheme. According to the results of multi-objective optimization design of bed, the optimal design scheme based on objective optimization is obtained. After the parameters are rounded, the casting bed is brought into the whole machine model, and the static analysis of the whole machine is carried out to check the safety of the structure.
High-temperature Ceramic Manganese Crystal Glaze
Authors: Shen Haiyong , Yang Jingyu , Li Jun 
Published: November 2020

Abstract
The main purpose of this paper was to produce high-temperature ceramic manganese crystal glaze made from manganese dioxide by firing at 1310 ° C in reducing flame atmosphere. This paper describes the process of glaze preparation and the kiln temperature controlling during the glaze firing process in detail. For the glaze effect of the manganese crystalline glaze after firing, the super-depth-of-field three-dimensional microscope is used to observe the true depth of field of more than 20 times of the optical microscopic system.
Effect of Milling Parameter on the Surface State of Ultra-high strength Steel 16Co14Ni10Cr2Mo
Authors: Xu Jin , Yan Fuwu , Li Yan , Yang Zhenchao 
Published: November 2020

Abstract
The machining mechanism and process parameters of ultra-high strength steel 16Co14Ni10Cr2Mo are still lack of complete understanding. By changing the milling condition, the influence of process parameters on cutting force, such as Radial milling depth, Axial milling depth, Feed per tooth and milling speed, is studied,and in the meanwhile that the surface morphology and hardness of 16Co14Ni10Cr2Mo after machining are analyzed. Indicating that the milling force increases with the increase of axial milling depth, feed rate and radial milling depth. With the increase of milling speed, the milling force reduces. The effect of axial cutting depth and radial cutting depth on cutting force is maximum. For 16Co14Ni10Cr2Mo ultra-high strength steel, it is suitable to use small cutting depth and high milling speed. On the surface of milling material, partial melting and partial oxidation of chips occur. When the milling speed and feed rate increased, the surface hardness of the material did not change significantly, and there was no work hardening.
Hot Compression Deformation Characteristics of Nimonic Alloy as-forged
Authors: Chunchun WU , Keyu JIN , Gang CHEN 
Published: November 2020

AbstractHot Deformation Behavior and Constitutive Model of the nickel-base alloy Nimonic Alloy as–forged are investigated by hot compression tests in the ranges of strain rate (0.001-1s−1) and temperature 1323-1423K, at intervals 50K. During the process of compression deformation, with the increase of true strain, the flow stress first increases rapidly to the peak value. Then, the flow stress decreases with the increase of true strain. Flow curves show dynamic recrystallization occurs at low strain rate (0.001-0.1 s−1) and temperature (1323-1423K). The softening mechanism at high strain rate (1 s−1) is dynamic recovery. According to the values of the ture stress and strain, the material constants of constitutive model are calculated and Arrhenius-type equation is given.
Research on the Influence of Main Spinning Process Parameters on the Forming Quality of 20 Steel by Strong Spinning
Authors: Yang Yu 
Published: November 2020

Abstract
With the continuous development of spinning technology, more and more products are processed by spinning. Every time spinning a new product, it is necessary to reset the spinning process parameters, which are usually determined by spinning process test. If the influence of spinning process parameters on the forming quality can be grasped, it can help the rapid setting and optimization of spinning schemes. In this paper, through a large number of spinning process tests, the effects of spindle speed and feed rate on the strength of 20 steel were analyzed, including the defects such as corrugation, cracking, and diameter expansion, as well as the spinning force, roundness and nominal diameter tolerance. The research results of this paper have certain scientific significance for the reasonable setting of process parameters of 20 steel, and provide theoretical basis for the optimization of spinning process parameters.
Experiment of ice ball impacting glass fiber laminate
Authors: Liu Yang , Qu Jia , Ju Dianwei , Pang Yuezhao , Yan Xiaojun 
Published: November 2020

AbstractAs a solid form of water, ice has brought a lot of technical challenges to aviation, ships, bridges and other related engineering fields, the technical fields such as the impact protection strength of aircraft and the strength design of icebreakers need to consider the influences of ice impact on structural strength and reliability. Therefore, in order to solve such problems, this paper takes the hail disaster as the background, and applies a first-level air gun to use 50.8mm (2inch) and 25.4mm (1inch) diameter ice balls to conduct impact experiments on glass fiber laminates at various speeds(2inch ice ball for 5 speeds, 1inch ice ball for 3 speeds). As the results, the specific support force of the laminated plate and its back plate strain under different working conditions are obtained. It is found that the impact reaction force of the 1 inch ice ball is basically proportional to the impact energy, and the law of the 2 inch ice ball is slightly different due to the fixing method of the laminated plate; in terms of strain caused by impact, it is concluded that the maximum strain at the contact portion of a 1 inch ice ball at an impact speed of 88 m / s is 10300με; at the same time, a high-speed camera was used to record the process of the ice ball impacting the target plate, and the damage of the ice ball at the instant of impact and the deformation form of the laminated plate were observed and analyzed.
Microstructure and photocatalytic activity of TiO2-SiO2 composite materials
Authors: Wang Jun , Zhang Wenjuan , Zhu Binghua , Xiao Yueyuan 
Published: November 2020

Abstract
TiO2-SiO2 composite materials with different composition (from 0 to 50 mol % SiO2) were prepared by sol-gel method. Microstructure, optical property and photocatalytic activity of TiO2-SiO2 composite materials were characterized by Raman scattering, ultraviolet-visible (UV-vis) spectrometer and photocatalytic degradation of methylene blue. The Raman spectra results showed that TiO2-SiO2 composite materials contained only a single crystalline phase of anatase TiO2. It also indicated the inclusion of SiO2 suppressed the growth of anatase TiO2. The UV-vis absorption spectra showed that the absorption edge of TiO2-SiO2 composite materials has a blue shift as the SiO2 increased. The optical band gap of TiO2-SiO2 increased from 3.06 eV to 3.32 eV for TiO2 and 0.5TiO2-0.5SiO2. The adsorption performance and photocatalytic activity of TiO2-SiO2 was enhanced with the increase of SiO2 content. 0.5TiO2-0.5SiO2 has the best absorption performance and photocatalytic activity in our experiment. And it has potential application value in the field of photocatalytic materials.
Mixture Strength of Recycled Concrete Based on Structural Forms
Authors: Liu Haitao 
Published: November 2020

Abstract
In order to test the application of recycled concrete with different particle grading in the road base, strength tests of different structural forms of the mixture are designed; the results show that the seven day strength of the mixture can meet the requirements of the road base, and the compressive strength of the skeleton dense structure is the highest. It is suggested that appropriate equipment should be used to process concrete waste and produce recycled materials with dense skeleton structure.
Study on stress relaxation characteristics of Fe based memory alloy based on strain constraint
Authors: Liu Linlin , Chen Peijun , Du Jinqiao , Wang Xinyi 
Published: November 2020

Abstract
The characteristics of stress induced ε martensitic phase transformation and its stress relaxation during tensile stopped loading of Fe-17Mn-5Si-10Cr-5Ni alloy under constant strain constraint were studied by X-ray diffraction. The results showed that the amount of stress-induced martensite of the alloy could be increased effectively under the constant strain constraint condition when the constant strain stopped loading for 0~10 min. The stress relaxation ratio of Fe-Mn-Si memory alloy increased sharply when the constant strain stopped loading for 0~5 min, and the relaxation ratio increased slowly after 5 min, indicating that the stress-induced γ→ε phase transformation was mainly completed within 5 min. Thermo-mechanical training not only improved the shape memory effect of Fe-Mn-Si memory alloy, but also reduced the stress relaxation ratio of the alloy. The characteristics of Fe-Mn-Si memory alloy should be considered when it was applied in practical engineering.
Study on Microstructures of Complex Plant Polysaccharides Aerogels and Their Effects on Porosity
Authors: Zheng Han , Wang Hao , Tian Yuan , Wang Xu , Tian Yongfeng , Zhan Jianbo , Fu Rongrong 
Published: November 2020

Abstract
The microstructure of polysaccharide aerogels is a key factor affecting porosity, and directly determines the efficiency of its application as filter rod material. Scanning electron microscopy was used to observe the effects of different amounts of starch on the microstructure of the complex plant polysaccharide aerogels. The experimental results showed that the aerogel samples showed a complete and homogeneous three-dimensional network structure. With the increase of starch content, the pore size became smaller and the pore structure on the hole wall became smaller. After adding starch, the concentration of the system increased, that is, the solute in the unit volume increased, the moisture content decreased, and the air replaced the water in the gel after freeze drying, resulting in the increase of the density of the aerogel and the decrease of porosity. All aerogels showed a trend of increasing filtration efficiency with increasing particle size. The filtration performance of aerogels with different starch content was tested by using the comprehensive performance test bed of filter media. The test results showed that the capture of filter material was mainly through inertial collision. When the particle size was bigger, the greater the inertia, the greater the possibility of particle contamination being captured, so the higher the filtration efficiency.
Progress in Preparation Methods and Applications of Inorganic Nanoparticles
Authors: Li Ruoxi 
Published: November 2020

Abstract
Nanotechnology is a new technology with great potential. It can be combined with many physical, chemical and biological methods to develop many nanomaterials with good properties, such as nanoparticles, nanofilms and nanoemulsions. Combining with the domestic and foreign research literatures, this article summarized the preparation methods and applications of the inorganic nanoparticles, introduced the solvothermal method, sol-gel method, thermal decomposition, electrochemical deposition and other preparation methods in detail, as well as application in catalysis, drug delivery, chemical energy storage. The research status and the development direction of inorganic nanoparticles were summarized and prospected, which might be contributed to the future research of nanoparticles.
Improved the response time of WO3 thin film by deposition of Ag nanolayers
Authors: Zhao Lin , Song Shipai , Li Le 
Published: November 2020

Abstract
The effects of different Ag layer thicknesses on the optical properties of WO3-Ag-WO3 composite films are studied by magnetron sputtering. The research of WO3-Ag-WO3 composite films reveals that the introduction of Ag layer is not conducive to improving the transmittance ability of the film, and the transmittance modulation amplitude decreases with the increase of Ag layer thickness. However, with the increase of the Ag layer thickness, the response time and the cycle stability of the films have been significantly improved. However, electrochromic performances will decline when Ag was sputtered too long. Taken together, in this experiment, when the sputtering time of Ag layer is about 6min, the electrochromic device assembled by composite thin film can obtain the most excellent electrochromic performances.
Study on Mechanical Properties and Micro Morphology of Acetate Filter Rod before and after Partial Degradation
Authors: Wang Hao , Zheng Han , Zhan Jianbo , Wang Xu , Fu Rongrong , Zhang Ling , Li Geng , Yu Yao , Zhang Ying 
Published: November 2020

Abstract
Mechanical properties and micro morphology of acetate filter rod before and after partial degradation were studied. In this paper, the mechanical properties and micro morphology of acetate filter rod samples and 28 days soil burying were compared by means of Scanning Electronic Microscopy (SEM), texture analysis, infrared spectrum analysis and thermos-gravimetry (TG) analysis. The results showed that after degradation, the average compression modulus, hardness and elasticity of cellulose acetate filter rod decreased by 15.14%, 15.19% and 0.82%, respectively. The infrared spectrum analysis showed that cellulose acetate was degraded by soil burying method and carboxyl carbonyl was formed, but the degradation degree was not high. The degradation degree of cellulose acetate was lower than that of cellulose acetate before degradation. The weight loss zone between 110 °C and 230 °C is less, which may be due to the complete degradation of the small molecular assistant added to the cellulose acetate degraded by the soil burying method.
A new design of 1×2 optical switch with silicon waveguide and phase change material
Authors: Li Yu , Liu Furong , Huang Yin , Chen Qingyuan 
Published: November 2020

Abstract
On chip photonics devices relying on the weak, volatile thermo-optic or electro-optic effect of silicon usually suffer from high energy consumption and low refractive index coefficient. In this paper, we designed a 1×2 phase change optical switch. The device is implemented in two silicon waveguides system using an overcladding layer of the phase change data storage material Ge2Sb2Te5 (GST), which exhibits high contrast in its optical properties upon transitions between its crystalline and amorphous structural phases. The switch shows cross-state and bar-state corresponding to amorphous GST (a-GST) and crystalline GST (c-GST), respectively. The characteristic parameters of the switch were carefully designed and simulated by three-dimensional finite-difference time-domain (3-D FDTD) method. As the simulation result, the insert loss was less than 0.5 dB. The crosstalk was -16 dB for cross-state and -29 dB for bar-state at 1550nm.The device performance can be further optimized and the low consumption phase change optical switch can be expected for future optical communication networks.
Properties of High Speed Friction Stir Welded 6063-T6 Aluminum Alloy
Authors: Xu Anlian 
Published: November 2020

AbstractFriction stir welding (FSW) is as known as a revolutionary welding technology, which has come to the foreground in recent years. The low welding speed affects the efficiency of friction stir welding (FSW) and hinders the large-scale commercial application of FSW. In order to improve the welding speed and promote the application of FSW, 6063-T6 aluminum alloy plates were friction stir welded with welding speed of 3000 mm/min. The properties of welds were also tested and analyzed. The results show that the alloy plates can be successfully welded by FSW with high speed welding speed, and the tensile strength of weld can reach over 71 % that of the base material.
Application of Ultrasonic Phased Array Detection Technology in Steam Turbine Components
Authors: Xuechao ZHANG , Feng YUN , Lei LV , Tong FENG 
Published: November 2020

Abstract
Ultrasonic phased array detection technology has the characteristics of fast, high sensitivity and recordable. The application of ultrasonic phased array detection technology to diaphragm, rotor, bolt and other turbine metal parts can effectively improve the detection rate of micro defects. At the same time, the development of reliable detection process can avoid the limitations of its detection and ensure the safety and reliability of turbine metal equipment.
Modal analysis on swinging structure of hydraulic press
Authors: Xiaoying Wang , Xiaowei An 
Published: November 2020

Abstract
In the actual work of hydraulic press, in order to ensure the design of auxiliary punching structure, that is, swing punching structure runs smoothly, the modal analysis of swing punching structure is carried out by using ANSYS software. The first 40 natural frequencies are determined, and the first 10 modes are analyzed. The shape variables and deformation modes are determined. Thus, the actual vibration response of the structure under the action of various external or internal vibration sources in each frequency band can be predicted to avoid resonance phenomenon in the work. At last, the aim of safety production, material saving and cost reduction is achieved.
Research on the application of phased array detection in Power transmission and transformation metal equipment
Authors: Xie Liming , Zhang Yanfei , Zhang Tao , Zhang Xuechao , Lv Lei 
Published: November 2020

Abstract
This paper analyzes and compares the characteristics of conventional nondestructive testing method and ultrasonic phased array testing method, and introduces several ultrasonic phased array testing methods of power grid equipment. Ultrasonic phased array technology is a high-efficiency, intuitive and reliable new nondestructive testing technology. It is of great significance to apply ultrasonic phased array technology to the nondestructive testing of power industry equipment and explore the adaptability of its testing technology to ensure the reliable operation of equipment and the security of power grid.