bluuebunny/crossref_metadata_2025_split huggingface dataset:
Penetration Behavior of Wp/Zr-based Amorphous Matrix Composite
Authors: Su Xiaohong , Hu Huie , Kong Xiaodong , Deng Jingxin 
Published: October 2020

Abstract
The penetration ability and penetration behavior of 50% Wp/Zr41.2Ti13.8Cu12.5Ni10Be22.5 amorphous matrix composite were studied through penetration test and microtopography observation. It is concluded that: the composite projectile shows self-sharpening behavior when penetrating 30CrMnMo steel target and 6061 aluminum target, especially after penetration of the aluminum target, the phenomenon of self-sharpening is obvious. 50% W particles added greatly improves the penetration performance of the composite. In the process of high-speed collision between the composite projectile and the target, the high temperature causes the amorphous alloy Zr41.2Ti13.8Cu12.5Ni10Be22.5 with low melting point to melt and cover on the surface of the crater.
Electrical Behavior against Current Impulse in ZnO Varistor Ceramics with SiO2 Addition
Authors: Wang Bowen , Fang Zhen , Fu Zhiyao , Peng Yongjing 
Published: October 2020

Abstract
SiO2 addition effect on electrical behaviour against current impulse in the ZnO varistors was investigated. SiO2 acts as a controller in ZnO grain growth, decreasing the grain size of ZnO from 8.87 to 5.86 μm, which in turn results in an increase in breakdown voltage E1mA
from 192.77 to 252.57 V/mm. SiO2 has a significant influence on the current energy withstand capability and impulse aging characteristics. The results indicated that the SiO2 content was optimized at 1.5 mol%, exhibiting the best energy withstand capability of 332.03J/cm3 and clamping ratio of 1.71.
Reviews on Interfacial Properties of the Carbon Fiber Reinforced Polymer Composites
Authors: Liu Fangbiao , Wang Danyong , Liu Juncong , Wei Huazhen , Zhang Haiyun , Xu Jingli , Li Shuhu , Qin Zhenming , Wang Ronghui , Jia Huamin , Zhang Jianqin 
Published: October 2020

Abstract
The bonding state between the carbon fiber and the polymer directly affects the properties of carbon fiber reinforced polymer composites (CFRP), which is influenced by the surface structural characteristics of carbon fiber (CF). The surface of CF is composed of tightly packed graphite crystallites lacking active carbon atoms, which results in low surface energy of CF and weak interfacial performance of CFRP. The interfacial properties can be evaluated indirectly through macro-mechanical properties, and can also be characterized by micromechanical testing methods. In order to improve the interfacial combination between the carbon fiber and the polymer, it is usually to modify the interface of CFRP, which mainly includes carbon fiber surface functionalization, carbon fiber surface coating and introduction of micro-nano enhancement phase. In this paper, researches on the interfacial properties of CFRP were reviewed, and the existing problems and the future research focus were also discussed.
Mix Design and Strength Properties of Full Iron Tailings Concrete
Authors: Duan Yajing , Sun Jianheng , Dun Chenyang , Guo Yao , Ma Xinxin , Yang Mingjing 
Published: October 2020

Abstract
In this paper, the iron tailings powder, iron tailings sand and iron tailings gravel in Qian’an city are used to replace fly ash, river sand and gravel respectively as admixture, fine and coarse aggregates of concrete. Through mix design, the high-fluidity concrete with strength grade C25, C30 and slump of 180~200mm is prepared. The compressive strength of all kinds of concrete with iron tailings powder as admixture can meet the requirements of the corresponding strength grade. The basic strength properties of full iron tailings concrete are more prominent in all kinds of concrete with iron tailings powder as admixture, and are the closest to that of fly ash concrete.
Selective Recognition of Fe3+ by a Simple Schiff Base Chemosensor
Authors: Liu Zhilian , Wang Mengqi , Liu Hui , Liu Wei , Zhang Qiang , Wang Xiaoyan , Zhao Hao , Dai Xinran , Deng Ziwei , Chen Pingping , Min Gao , Yuan Mengting , Wang Tengfei , Zhang Shuxiang 
Published: October 2020

Abstract
A simple and easily synthesized Schiff base chemosensor 1 was prepared by the one-step condensation reaction of 3-acetyl-4-hydroxycoumarin and 1-naphthylamine. The metal ion recognition ability of the chemosensor was measured by UV-Vis spectrophotometer. It demonstrated that its absorbance at 327 nm enhanced upon addition of Fe3+ significantly. The absorption intensities at 327 nm fitted good linear relation (R
2=0.9928) to Fe3+ concentration in DMF. 1 is able to recognize Fe3+ selectively over other ions. The synthesized chemosensor 1 would be useful to detect Fe3+ qualitatively and quantitatively.
Study on Hydration Resistance of MgAlON Composites
Authors: Guo Yanqin , Ji Zhe 
Published: October 2020

Abstract
Selected Aggregate, matrix and a small amount of sintering aids as raw materials. Mixed raw materials evenly, Sintered in high temperature nitriding furnace. Two test samples series of hydration resistance were made. Measured the pH value of the hydration samples, the content of nitrogen before and after hydration; drawn the change curve of pH value; calculated the weight change rate of samples before and after hydration; detected the phase composition of block sample before and after hydration. The results show that: under the same process conditions, the hydration resistance of MgAlON composite with spinel as aggregate is better than that of MgAlON composite with magnesia as aggregate. Compared with the sample of the same aggregate, the hydration resistance of the alumina based sample is better than that of the bauxite based sample. The phase composition of samples is almost unchanged before and after hydration, The reason for hydration is mainly due to the hydration of a small amount of AlN in the sample. The hydration resistance of MgAlON composites is much better than that of AlN composite.
Study on Wear-resistant Surfacing Flux Cored Wire for Shield Machine Hob
Authors: Su Banghe , Sun Junshen , Xu Hu , Jiao Enli , Zuo Zengmin 
Published: October 2020

Abstract
The hob is an important tool for the shield machine, which improves its wear resistance and is of great significance for extending its life and improving the reliability of the shield machine. Based on the working condition of the hob, Ni-Cr-B-Fe surfacing flux-cored wire was designed. The effects of Ni and B content on the microstructure and properties of deposited metal were studied by XRD and SEM. Optimize Ni and B content to provide technical data. The powder 40%Ni-10%Cr-50%Fe-B alloy flux-cored wire studied was used for hob surfacing, which significantly improved its wear resistance.
Study on the Seismic Behavior of Eccentrically Braced Steel Frames of Replaceable Shear Links With Web Opening
Authors: Li Tong , Shi Qiang , Wang Xinwu , Ye Chongyang 
Published: October 2020

Abstract
The replaceable energy-dissipating beam is convenient for post-earthquake repair and reinforcement or direct replacement. A quasi-static test study of an eccentrically supported steel frame with replaceable energy dissipating beam sections was performed, and the hysteretic performance and failure mode of the eccentrically supported steel frame with replaceable energy dissipative beam sections were obtained. Based on the test results, the structure of the energy dissipating beam segment was improved, and a number of K-shaped eccentric support frame finite element models for the web opening ratios of different energy dissipating beam segments were established. Nonlinear numerical analysis was performed on its hysteretic performance. The research shows that the finite element analysis is in good alignment with the test results. The opening of the web in the energy-consuming beam segment can effectively reduce the stress level of the frame beam and ensure that large plastic deformation occurs within the energy-consuming beam segment. With the increase of the opening ratio, the ultimate bearing capacity, initial stiffness and energy consumption of the frame have all shown a downward trend. The research provides a basis for the seismic design of similar structures and can guide the design of related projects.
The Influence of Braking Pressure on the Temperature and Stress Field of Iron-based Friction Pairs
Authors: Ning Keyan , Han Junjiao , Han Ming , Zhang Nan , Du Jianhua , Lang Zhaoyang , Liu Zhe , Liu Guimin , Ji Zhen , Jia Chengchang 
Published: October 2020

Abstract
The material model was established by the finite element analysis software ABAQUS. The temperature field and stress field of iron-based powder metallurgy friction pairs under the brake pressure of 0.44Mpa and 0.8MPa were calculated respectively. The variation laws of temperature and stress under two pressure conditions were compared and analyzed. The results show that with the increase of braking pressure, the stress of the friction pairs increases, but the distribution of temperature and stress fields changes little.
The Effect of Rotation Speed on the Temperature and Stress Field of Iron-based Friction Pairs
Authors: Han Junjiao , Ning Keyan , Han Ming , Zhang Nan , Du Jianhua , Lang Zhaoyang , Liu Zhe , Liu Guimin , Ji Zhen , Jia Chengchang 
Published: October 2020

Abstract
In view of the iron-based powder metallurgy friction pairs under braking conditions, the temperature field and stress field of friction pairs under different rotation speeds were calculated by using the finite element software ABAQUS through building the structure and physical model of friction pairs. The temperature and stress distribution of the friction pairs under different rotation speeds were studied. The results show that in the process of friction braking, the temperature at the middle diameter of the friction contact surface is higher, and the stress at the inner diameter of the friction contact surface is the largest. With the increase of rotation speed, the distribution of temperature and stress is not changed.
Calculating the Mechanical Properties of DX56 Steel by the Spherical Indentation Method
Authors: Sun Mingcheng , Tan Che , Tan Wei , Yang Chao 
Published: October 2020

Abstract
The mechanical properties of metal materials are studied by indentation method in this paper. The elastic-plastic curve of indentation experiment is obtained by fitting the representative stress and strain points, and the theoretical elastic-plastic curve is described by the power index equation of three parameters. After optimal coincidence of two curves, the yield strength, strain hardening index and elastic modulus of the material are obtained. Taking DX56 steel as an example, which has good deep drawing property for automobile, the mechanical properties of the steel are tested by indentation method and compared with the results of uniaxial tensile test. The error of tensile properties is small, so the indentation method can be used to detect the mechanical properties of metal materials.
Experimental Research on Basical Mechanical Properties of Bamboo Plywood
Authors: Tang Gan , Zhang Zhexian , Sun Ping , Jiang Tianli 
Published: October 2020

Abstract
The objective of this study is to investigate the mechanical properties of bamboo plywood. Seeking more sustainable materials to reducing the carbon impact onto our environment has put bamboo on the map as an alternative building material, especially in the regions such as China, Southern Asia, and South America, where the bamboo is abundant. The basical mechanical properties of the bamboo plywood were carefully tested and recorded to provide a first-hand database on the parameters of the compressive strengths and shear strengths of such material.It can provide theoretical reference for the application of bamboo plywood in practical engineering.
Experimental Study on Bending Property of Bamboo-Reinforced Solid Wood Composite Board
Authors: Chen Qiang , Bao Yanmin , Xie Xinghua , Li Xianmin , Yang Ling , Xie Zihong , Shen Bo 
Published: October 2020

Abstract
Bamboo and wood structures are restricted by material characteristics because of its span, bearing capacity and structural size. In order to reveal the relationship between the bearing capacity and the bearing capacity of the bamboo-wood composite structure, this paper proposes a bamboo-reinforced solid wood composite board with bamboo-reinforced board and solid wood as the skeleton, which is spliced with any length of wood bar, and is subjected to mid-span bending test. The failure form, the relationship between load and deflection, and the relationship between load and strain are obtained. The experimental results show that the strain along the middle cross section of the original wood board and the bamboo-reinforced solid wood composite board is still basically in accordance with the assumption of flat section, which indicates that the bamboo and wood can work together, and that the bamboo-reinforced solid wood composite board give full play to its tensile properties.
Research on the Performance of Series Waterborne Polyurethane Acrylate Modified Epoxy Acrylates
Authors: Liu Hongbo , Xue Xiaowu , Xiao Wangdong , Wei Jingjing 
Published: October 2020

Abstract
In this study, a series of bifunctional-based UV curable waterborne polyurethane acrylate modified epoxy acrylate (UV-WPUA) was prepared by using 2,4-toluene diisocyanate (TDI), Epoxy resin (E51) and polyethylene glycol (PEG) as the main materials. Waterborne resin and UV curing film with content of C-O-C were obtained by using polyethylene glycols with different molecular weights. The infrared spectra (FT-IR) demonstrated the presence of C=C and epoxy bond in the UV curing film chains. In addition, the molecular weight of the oligomer, and glass transition temperature, gelation rate and thermogravimetric analysis of the films were investigated.
Coexistence of Digital and Analog Resistive Switching Behaviours in Ag/CuAlO2/TiO2/p++-Si Memristor
Authors: Yi Hai , Ilyas Nasir , Li Chunmei , Li Dongyang , Jiang Xiangdong , Li Wei 
Published: October 2020

Abstract
The digital resistive switching is suitable for the applications of information storage and logical operation, while the analog resistive switching is required in the neuromorphic computing system. This paper reports the stressed bias voltage-dependent digital and analog resistive switching behaviours coexisted in Ag/CuAlO2/TiO2/p++-Si memristor devices. At high biased voltage, the device has demonstrated bipolar resistance switching functions with a resistance ratio over 104 and reliable durability. Moreover, in the low voltage sweeping region, the device showed potentiation and depression characteristics. It is suggested that the bipolar resistive switching may be due to the local migration of Ag and oxygen ions within the dielectric layers. This new memory structure with digital and analog resistive switching is expected to reduce to decrease the manufacturing complexity of the electronic circuit containing digital/analog memristors.
Using Wolfram-Doped Diamond-Like Carbon Film to Extend Lifetime of Spinneret Punching Needle in Production Line
Authors: Sun Yibo , Wang Caiping , Yu Xiang , Tian Zhenfei , Guo Zhenhua , Liu Yuzhong 
Published: October 2020

Abstract
Punched by needle, spinneret is a critical component of chemical fiber production equipment. Increasing order and short lifetime of punching needle seriously drags the production schedule of enterprise. W-DLC (wolfram-doped diamond-like carbon) film was deposited on the needle in a magnetron sputtering system, and the doping content of wolfram was controlled by adjusting the ratio of Ar to C2H2. A systematic investigation was conducted on the structural and punching performances of the coated needle. The results show that, (1) W-DLC film has a dense structure, and W element exists in phase of W1-XC. (2) W-DLC film plays an important role of the needle protection, and can prolong its lifetime in evidence. (3) W-DLC film coated punching needles can punch up to 6000 times per needle, and its lifetime can be increased to about 200% in the production line.
Solvothermal Synthesis and Characterization of Nest-shaped BiOCl
Authors: Yang Hui , Wang Xiaoyu , Wei Jiangang , Mao Yuqin , Zhu Luping 
Published: October 2020

Abstract
BiOCl with nest morphology was preparation successfully. By the condition that the ratio of BiCl3 to urea is 1:2 and with a simple solvothermal route. The morphology and composition of BiOCl were studied by X-ray diffractometer (XRD), scanning electron microscope (SEM), and UV-vis spectrophotometer methods. SEM result indicates that the sample exhibited nest-shaped structures. XRD results showed that the synthesized sample were pbfcl layered structure BiOCl with good crystallinity. UV–vis spectra reveal that the band gap energy of the BiOCl was 3.57 eV.
Preparation and Properties of Pesticide-loaded Carboxymethyl Chitosan Microsphere
Authors: Xu Qing , Wang Daibo , Liu Guohua , Yan Changrui , Yang Jiang , Nie Fei 
Published: October 2020

Abstract
Controlled release system has been widely developed and used in agriculture to improve efficacy and minimize environmental pollution. Here, the pesticide-loaded carboxymethyl chitosan microspheres were constructed by suspension-crosslinking method. Carboxymethyl chitosan was used as a carrier to formulate microsphere to load neonicotinoids with a mixture of calcium chloride and glutaraldehyde as double-component cross-linking agent. The resulting microsphere processed high drug loading and encapsulation efficiency with a mean diameter of 1 mm. The UV detection method of pesticide was established, which was convenient and quick. The pesticides release properties of the microspheres were investigated, and the controlled release time was more than 6 days, which achieves the objective of improving the efficacy of the pesticides. This work would promote the development of controlled-release pesticide systems.
Comparing Study on Metal Rubber and High Polymer Rubber
Authors: Lu Chunhong , Bai Yuwei , Zhang Yuzhi , Tian Guang 
Published: October 2020

Abstract
In this paper, the metal rubber and rubber were systematically compared, on the basis of comprehensive comparison of the manufacturing technique property of the metal rubber and high polymer rubber, the physical and mechanical properties of the two materials, especially the elastic and damping properties, were emphasisly compared. Finally, the scope of application of the two materials was discussed. The results of this study has certain guiding significance for application of metal rubber properly by the researchers engaged in the vibration isolation and damping of engineering.
Safety Analysis of Carbon Fiber Composite Subjected to Different Levels of Bending Moment
Authors: Li Jialong 
Published: October 2020

Abstract
Carbon fiber composite rods can be widely employed in engineering due to their high ratio of the strength and density. Carbon fiber composite rods can be only used in the suitable conditions. In particular, under the bending deformation, the failure of carbon fiber composite rods can lead to the engineering accident if the applying bending moment is beyond a certain value. In this paper, a finite element model (FEM) for carbon fiber composite rod was put forward to simulate the mechanical responses of carbon fiber composite rod subjected to bending moment loading. A series of simulations under different levels of bending moments were conducted. Based on the calculated results, the limit bending moment was obtained by comparing the mechanical responses and the failure strength.
A Control Circuit Design for Automatic Aperture
Authors: Cao Yong , Zheng Yifan , Liu Yi , Wang Xiao , Hu Jinrui 
Published: October 2020

Abstract
In view of the fact that automatic aperture technique is applied as a method of regulating light in the current industrial monitoring and control systems more and more, an automatic aperture control circuit is designed according to automatic aperture control principle. The circuit has the characteristics of the simple structure, low cost and high reliability and etc. It has been proved by experiments that the circuit can adjust the size of aperture automatically according to the change of the external illumination, which ensures proper luminous flux entering the lens, and avoids the loss of image gray levels in bright space, and solves the image flicker caused by the change of light intensity, ensures the CCD get used to brightness changes of scenery outside and obtain the best image.
UK’s Ecological Protection Construction Characteristics and Its Enlightenment on Hainan China
Authors: Zhang Changda , Li Ziyu , Zhang Hua 
Published: October 2020

Abstract
The Central Committee of the Communist Party of China has explicitly proposed the construction of a national ecological civilization experimental area (Hainan), and it is also one of the strategic orientations given by General Secretary Xi Jinping to Hainan’s "three zones and one center". Hainan has now accelerated the pace of ecological protection construction. The article systematically expounds the characteristics of ecological protection construction in the United Kingdom, and analyzes the deficiencies in ecological protection construction in Hainan. Drawing on the experience of ecological protection construction in the United Kingdom, and combining the actual situation in Hainan, four suggestions for improving ecological protection construction in Hainan are put forward: 1) Legislation first, strengthen the top-level design; 2) Scientific zoning, implement diversified management; 3) Promote green and harmonious national park Construction; 4) grasp the key points and do a good job in the design of eco-tourism products. With a view to providing a reference for Hainan’s ecological protection and construction.
Simultaneous Measurement and Simulation of Angular Position and Angular Speed for Time Grating
Authors: Gao Zhonghua , Li Pengxia , Wan Jialuo 
Published: October 2020

Abstract
A method is presented in order to realize the measurement of angular position and angular speed simultaneously based on the theory of time grating and the measurement of angular position and angular speed is transformed into the measurement of phase difference. Four orthogonal excitation signals are generated by the internal phase-locked loop module of FPGA. The excitation signals are superposed and input to the stator sensor. At this time, the rotation of the motor causes the rotation of the rotor sensor to generate the induction signal. The phase difference of the two signals will be obtained by the input comparison circuit of the induction signal and the excitation signal. The phase difference will be processed in FPGA, and finally the angular position and angular speed values will be obtained. The simulation results show that the method is feasible. The experimental results show that the accuracy error of angular position measurement can reach ±3", and the measurement speed stability can reach 3rpm(3%o) when the angular speed is 1000rpm.
Flexible Quantum Dot Light Emitting Diodes based on Copper Nanowires/Poly(P-Phenylene Benzobisoxazole) Composite Electrode
Authors: Yang Min , Zhang Qin , Zhang Wenjing , Ren Fumeng , Feng Jinlei , Gong Dongfei , Hao Zhongqi , Hai Xia , Li Fangfang , Zhang Yubao 
Published: October 2020

Abstract
Flexible quantum dot light emitting diodes have attracted widespread attention due to their many advantages such as low cost, color tunability, and high luminance effciency. Among flexible electrodes, copper nanowires have attracted much attention due to their high electrical conductivity, simple fabrication process, and low cost. However, the oxidation and poor film quality of copper nanowires films are the barrier that restrict their practical application. In this paper, polyethylene terephthalate/copper nanowires/poly(p-phenylene benzobisoxazole) composite flexible electrode can solve the problems of oxidation and high surface roughness of copper nanowires, which improves the performance of flexible quantum dot light emitting diodes.