bluuebunny/crossref_metadata_2025_split huggingface dataset:
Design of a Detection and Maintenance Equipment Based on Arduino
Authors: Wu Yong , Lei Lei , Zhang Jianhu , Ruan Xiaoyan , Zhang Jun 
Published: December 2019

Abstract
The photoelectric encoder of a certain type of equipment has a high failure rate. When repairing, it is often unable to locate the fault accurately and judge the quality of the photoelectric encoder. At the same time, the battery performance of this type of equipment often affects its service life because it can not be maintained in time. In order to improve the technical support ability of the equipment, realize fast and accurate fault diagnosis and prolong its battery life, a detection and maintenance equipment based on Arduino is designed. The detection and maintenance equipment is simple to use and easy to operate.
Analysis of Chip Morphology in Drilling Ti-6Al-4V by Using Graphene Oxide Nanofluids
Authors: Mao Xuanyu , Yi Shuang , Mo John , Dimla Eric , Ding Songlin 
Published: December 2019

Abstract
Titanium and its alloys have been widely used in various areas due to their superior mechanical properties. However, Titanium and its alloys have low elastic modulus and low thermal conductivity, which lead to extreme high temperature during the machining process and result in poor workpiece quality. The main objective of this paper is to investigate the effectiveness of graphene oxide (GO) nanofluids in drilling process of Ti-6Al-4V by using tungsten carbide tools. The spiral chips were obtained when GO nanofluid was used and squeezed string chips were obtained when conventional coolant was applied. By analysing the back surface of the chips, it was found that the high coolant pressure resulted in better chip formation, which had less scratch and plunking. In addition, by using higher concentration of GO nanofluids, the adhesion phenomenon was found significantly reduced.
Reasons for the Formation of Tissue Defects in Continuous Casting Low Alloy Extra-Thick Plates and Countermeasures
Authors: Ye Tie , Lu Zhiwen , Zhong Zhiguo , Ma Chunhua 
Published: December 2019

Abstract
Scanning electron microscopy and electron probe were used to observe the internal defects of continuous casting low alloy extra-thick plates. The results show that there is Mn segregation, MnS segregation, inclusions and Al2O3 inclusions in 100mm continuous casting low alloy extra-thick plates; The center is loose and the microcracks are accompanied by the central segregation and inclusions. These defects greatly damage the mechanical properties of the product. In order to reduce these defects, the method of controlling sulfur and calcium is used in the smelting process to reduce the formation of MnS; controlling the moisture and combined water absorbed by the steelmaking materials, and reducing the hydrogen content in the molten steel and the formation of hydrogen atoms to reduce cracking of the steel sheet.
Research on Tissue Culture Rapid Propagation Technology of Taiwan Lily
Authors: Li Yi , Xia Xiaoyi , Liang Jian , Yang Zisong 
Published: December 2019

Abstract
This experiment selected Taiwan lily as experimental material to study the different ages of lily to produce different explants to induce differentiation, through subculture and the optimal conditions for tissue culture outdoor refining, and then the experimental staff established Systematic Taiwan lily flower tissue culture and rapid propagation technology. Studies have shown that the optimal medium for differentiation of Taiwan lily flower scales (winter sampling) is MS+0.2 ug/L GA3+0.1 mg/L NAA+1 mg/L 6-BA; optimal Taiwan lily leaves (winter sampling) The medium for differentiation was MS + 0.1 ug / L GA3 + 0.1 mg / L NAA + 1 mg / L KT. The best scale-induced differentiation medium for Taiwan lily (spring sampling) that was not in dormancy was MS+0.1 mg/L NAA+1.0 mg/L 6-BA, and the leaf differentiation medium was MS+0.1 mg/L NAA+ 1 mg/L IBA. MS+0.2 mg/L NAA+1.0 mg/L KT was the best callus differentiation bulb culture medium, MS+0.5 mg/L NAA+0.5 mg/L 6-BA was the best induction rooting medium.
Research on Design and Application of Absorbing Material Based On Electromagnetic Compatibility of Handheld Device
Authors: Zhao Lei , Zhao Tingdi 
Published: December 2019

Abstract
The paper analyzes the characteristics of the absorbing materials through detailed data, and then studies the manufacturing theory of electromagnetic compatibility about absorbing materials. In the course of the experiment, the writer solved the problem that the reflectivity measurement could not be accurately predicted. The experiment was carried out and finally found that the absorbing material reflectivity modeling simulation experiment with finite integral method is the great method. In the next test process, the writer used the above theory to test the handheld device. Finally, the results show that the finite integral method is worked, and then the absorbing material reflection simulation operation is performed. The method can accurately obtain the range of the test frequency. The writer tested the electromagnetic compatibility of the handheld device and found that the effect of the absorbing material using the method was very obvious, the material could have a good application market.
Numerical Simulation of Temperature Field of 12crni2 by Laser Melting Deposition
Authors: Duan Chenghong , Zhou Junjing , Luo Xiangpeng , Zhao Minghuang 
Published: December 2019

Abstract
Based on the heat transfer theory, and the fact that thermal physical parameters, latent heat of phase change and heat transfer coefficient which vary with temperature is taken into considered, a three-dimensional transient temperature field model of 12CrNi2 by Laser Melting Deposition (LMD) is established by using the parametric design language of ANSYS. Optimum process parameters were determined by single-layer and single-track experiments of LMD. Microstructure observation by optical microscope shows that the width of heat affected zone increased with the increase of laser power and decreased with the increase of printing speed. The top of the deposited layer is mainly composed of equiaxed dendrites, and the middle and bottom of the deposited layer are columnar crystals with epitaxial growth characteristics. At the same time, the accuracy and reliability of temperature field model are verified by comparing the morphology of molten pool. The simulation results show that in the process of LMD, the peak temperature of molten pool increases with the increase of layers; the peak temperature of the node increases with the increase of laser power and the decrease of printing speed. The research results in this paper would be reference for LMD of 12CrNi2 alloy steel.
Experimental Study on Welding Dynamic Mechanical Properties of Q460JSC and HQ600 High Strength Steel at High Strain Rate
Authors: He Zhiyang , Liu Xiyue , Ye Jiayi , Yan Luhui 
Published: December 2019

Abstract
In order to study the high strain rate effect of the high-strength steel structure weld and its heat-affected zone material under the action of explosion, in this paper, the Q460JSC and HQ600 high-strength steel welded specimens were quasi-static and high strain rate tensile test of 1500/s to 5000/s using electronic universal testing machine and Hopkinson rod tester. The dynamic mechanical properties of high strength steel welded joints were studied. The results show that both the weld and its heat affected zone have strain rate sensitivity, and the strength and ultimate strain are higher than quasi-static under high strain rate. The center weld strength is higher than that of the base metal but the plastic deformation ability is weak. The strength and ultimate strain of the Q460JSC heat-affected zone are about 10% lower than that of the base metal, while the HQ600 high-strength steel has a smaller drop and better weldability.
Time-Varying Stiffness Calculation of Spiral Bevel Gears Based On SIMPACK
Authors: Ge Xiaolin , Sun Yuehai 
Published: December 2019

Abstract
Aiming at the difficulty in calculating the time-varying stiffness of spiral bevel gears, the time-varying stiffness acquisition and calculation of spiral bevel gears under the actual coincidence degree based on SIMPACK is proposed. Taking a pair of spiral bevel gears as an example, the process of modeling and simulation with SIMPACK is described in detail. The numerical results are compared with the ISO standard calculation method, which verifies its correctness and rationality. Through the analysis of the relationship between meshing stiffness and load and damping under different working conditions, it is shown that meshing stiffness increases nonlinearly with the increase of load, and load damping makes the change of stiffness curve gentler.
Mechanical Performance Analysis of Prestressed Concrete Composite Box Girder Bridge with Corrugated Steel Webs under RW Cantilever Construction
Authors: Jiang Zhuchang , Cao Hongliang , Yin Yongsheng 
Published: December 2019

Abstract
As a new type of steel-concrete composite bridge, PC composite box Girder Bridge with corrugated steel webs has been rapidly developed in China in recent years. With the deepening of research, a new type of construction technology - RW cantilever construction began to be applied to the construction of such bridges. This paper first introduces the general steps of RW cantilever construction and the advantages compared with traditional cantilever construction. Then, take a continuous rigid frame bridge with corrugated steel webs under RW cantilever construction as an example, and build its finite element model. The crack resistance and compressive stress of the concrete and the shear stress of the corrugated steel web were checked to meet the requirements of the specification, and the feasibility of the construction method was verified.
Application of the Generalized Interpolation Material Point Method Coupled With the Finite Element Method for Rigid-Flexible Contact
Authors: Chen Feng , Chen Rong , Jiang Banghai 
Published: December 2019

Abstract
The paper shows the numerical simulation of the Generalized Interpolation Material Point Method (GIMP) coupled with the Finite Element Method (FEM) in rigid-flexible contact. The GIMP can overcome certain numerical noise existing in the original MPM and is used to simulate the great deformation of soft materials. A rigid material with a higher hardness can be described by the finite element method for limited deformation in rigid-flexible contact. First, the feasibility of GIMP was verified by the high-speed gelatin impact rigid wall. After that, this article shows the collision simulation of an iron bar and a gelatin bar. By comparing the material deformation, internal pressure distribution and the form of shock-wave obtained by GIMP with the calculation results of ls-dyna, it is shown that couple the GIMP and finite element method to deal with rigid-flexible contact is feasible.
Design of Calibration System for Motion Attitude Measurement of Large-caliber Projectile
Authors: Wang Dongxu , Gao Hongju , Sun Zhonghui , Qiao Zhiwang , Di Changan 
Published: December 2019

Abstract
To meet the large-caliber projectile motion measurement system calibration requirement, developed a large-caliber projectile motion measurement system calibration system, gives the calibration principle and working process, design a visibility good green light source as the collimating light source, the design targets based on the filtering and PSD field grid position detection module; Aiming at the calibration requirement that the six faces of cavity cross grids frame cannot be shielded, the cavity cross grids adjustment module is designed. Error analysis shows that the calibration error of the system is 0.062mm.
Mechanical Analysis of Sandwiched Maglev 2D-Positioning Stage
Authors: Song Ningran , Zhou Guangxu , Zhu Mengmei , Ma Shuyuan , Mu Yongyun , Gao Jia 
Published: December 2019

Abstract
This paper proposes a two-dimensional magnetic positioning stage with a sandwiched coplanar structure. The novel symmetric compensation structure can realize the steady levitation of the platform, which is of vital importance to the positioning accuracy. To verify the reliability of the special structure, vibration modal, thermal deformation and mechanical deformation of the sandwiched maglev positioning stage under different working conditions are analyzed in finite element method. The simulation results show that this novel structure can meet the working requirements.
The study on photocatalytic performance of Metal amorphous/TiO2 nanocomposite materials
Authors: Chen Suhong , Xu Naiyuan , Zhu Yi , Zhang Lei , Pang Xiangkun , Xu Ting , Yun Yuxin 
Published: December 2019

Abstract
Based on the composite TiO2 / metal the excellent properties of amorphous in catalytic. Found in the process of experiment, the different micro - nano amorphous particles compound nanometer anatase TiO2 dual azo dyes and other organic pollutants, under natural conditions with efficient, fast, catalytic degradation effect.
Rolling-Cladding Technology for Cu-Al Thin Sheet
Authors: Xiong Sang , Shang Zhengping , Gao Huan , Zhai Qijie 
Published: December 2019

Abstract
In order to meet the demand of electronic and heat-radiating devices for CuAl composite the rolling-cladding technology for Cu-Al thin sheet was developed. The corresponding roll-cladding technology was optimized by the experiments. The varying regularity of thickness ratio in the rolling process of Cu-Al thin sheet was studied. The change in the Cu-Al interface was investigated by adopting different annealing technologies. The results show that the critical rolling reduction rate for AlCu cladding decreases with increasing the thickness proportion of Cu. The reduction rate of Al and Cu is proportional to total reduction rate. With the increase of the rolling reduction rate of Al and Cu, the reduction rate of Cu and Al also increases. Annealing can enhance the bending performance of the thin sheet. However, when the annealing temperature is too high, the hard and brittle intermetallic compounds form at the interface of Cu and Al, which will deteriorate the bonding strength of Cu-Al cladding sheet.
Preparation of a Hydrophilic Nitrocellulose Membrane
Authors: Tang Yuting , Xing Li , Wang Ping 
Published: December 2019

Abstract
This paper analysed the present situation of hydrophilic nitrocellulose membrane at home and abroad. Then we propose the preparation method of commercialized hydrophilic nitrocellulose membrane. The hydrophilic nitrocellulose membrane is suitable for rapid diagnostic products after steam-inducing phase separation. The membrane has uniform surface and internal structure and good protein adsorption capacity. It is applied to the test of fast diagnostic products, and the test results are good.
Application of Improved Collaborative Filtering Algorithm in Recommendation of Batik Products of Miao Nationality
Authors: Ding Ning , Lv Jian , Hu Lai 
Published: December 2019

Abstract
Recommendation system has been widely used in various e-commerce websites, but there are few personalized recommendations for ethnic handicrafts. And the national handicraft recommendation belongs to the small batch recommendation behavior, so the recommended performance is limited by the sparsity of the data in the scoring matrix. To solve this problem, an improved collaborative filtering algorithm is proposed, in which the user-based collaborative filtering algorithm is nested in the collaborative filtering algorithm based on gradient descent. First, the scoring prediction value is filled into the unscoring items in the scoring matrix, and then the recommendation is given by using the collaborative filtering method based on gradient descent. The proposed method is applied to the recommendation of wax dyeing products of Miao nationality and compared with the existing traditional methods. The results show that the improved algorithm greatly improves the recommendation performance, reduces the recommendation error and improves the accuracy.
Effect of Irradiation on Austenite Phase in Thermally Aged 308 Stainless Steel Weld Metal
Authors: Li Yuanfei , Liu Xiangbing , Xue Fei , Xu Chaoliang , Qian Wangjie , Li Jinyu , Peng Qunjia , Li Zhengcao 
Published: December 2019

Abstract
In this study, 308 stainless steel weld metals aged at 400°C for 7000h were irradiated at 400°C to different fluences with 240keV proton to study the effects of radiation on austenite phase. The microstructural change was examined by transmission electron microscope (TEM), and the hardness change was measured with a nano-indentation tester. It was found that bubbles and dislocation loops were formed in the austenite phase, and their size and numerical density increased with the irradiation dose. The hardness of the austenite phase also increased with the irradiation fluence. According to the statistical results of microstructural features, the dispersed barrier hardening model was used to correlate the hardness change with the microstructure evolution. Although the calculated value of hardness change was lower than the measured value, the variation trend of the calculated hardness values was in good agreement with that of the measured values.
Analysis and Research on Corrosion Law of Natural Environment of Materials
Authors: Zhang Mengru , Xi Zhexu 
Published: December 2019

Abstract
For the interaction of different types of materials, such as polymer materials, non-ferrous metals, ferrous metals and organic coatings, in the three different natural conditions of atmosphere, seawater and soil, this paper intends to analyze the data of corrosion datasets. It strives to introduce higher-dimensional, more accurate data, and proposes a more realistic and reference model mechanism by citing scientific optimization algorithms, which is more conducive to understanding the internal relationships between complex variables.
Research Progress of Organic Functionalized Graphene in Heterogeneous Catalytic Application
Authors: Wang Yufang 
Published: December 2019

Abstract
Graphene has been applied in many fields as a catalyst with inherent advantages because of its unique structure and properties. Functionalized graphene has been enriched and expanded in the field of performance and application, and has become the current research trend. Organic functionalized graphene is a non-metallic modification of graphene, which has more excellent catalytic performance and is widely used in many reactions. This paper reports the application of organic functionalized graphene in heterogeneous catalysis as the following aspects: of graphene oxide (Go), doped graphene, small organic molecules and modified graphene by organic polymers.
The Study on Equivalent Analysis Method of Optical Scattering Characteristics of Space Objects
Authors: Zhang Peng , Dai Yunchao , Zhong Mingfei , Xu Can 
Published: December 2019

Abstract
The optical observation of Space objects, it is an important component of Space Situation awareness, which is a significant means of obtaining information and developing objects recognition. The optical characteristics are important features of the spatial objectives that allow us to carry out the main elements of optical observation and analysis. In this paper, the target detection, feature extraction and recognition in the space target monitoring task are analyzed and studied systematically, the optical scattering characteristics of the space target and the equivalent analysis of the ground laboratory are analyzed. And the most important influencing factor, atmospheric attenuation, which was analyzed and calculated. Based on MODTRAN, we made the atmospheric attenuation calculation module was developed to correct the atmospheric attenuation factors. Finally, the equivalent analysis of the simulated and actual measurements in the laboratory is carried out and the irradiance of the equivalent space target is obtained.
Prediction of concrete compressive strength based on principal component analysis and radial basis function neural network
Authors: Sun Zongjun , Li Kai , Li Zhongyi 
Published: December 2019

Abstract
Aiming at the concrete compressive strength data measured in the field laboratory, the data samples are standardized and the missing and abnormal values of the data samples are detected and processed. Then, the principal component factors of several influencing factors are extracted with the idea of “dimensionality reduction” by principal component analysis, and a new data sample set is established. Finally, the radial basis function neural network model is constructed to simulate the concrete compressive strength. The strength is predicted and the predicted value is obtained. The results show that three principal component influencing factors are extracted by principal component analysis, and the RBF network structure with 50 neuron nodes in the hidden layer is established. The error of the predicted value of concrete compressive strength is less than 4%, which meets the control requirements of engineering test accuracy. The predicted model can be used to predict the compressive strength of concrete.
Numerical Simulation Study on T-tape Welding of Mild Steel
Authors: Ji Liangbo , Sun Xuejiao 
Published: December 2019

Abstract
Welding technology as an important technology of industrial production is widely used in production practice, T-type welding joint, as the main form of welding space joint, is widely used in daily production. The article mainly uses software ANSYS, the T-type welding of Q345 low carbon steel was analyzed by numerical simulation. Calculating the changes of temperature field and stress field, the results can effectively predict the problems related to welding quality, improve production efficiency and save production cost.
Measurement of Acoustic Basic Parameters of Polyethylene Pipe
Authors: Qi Guoquan , Li Yuke , Ding Nan 
Published: December 2019

Abstract
The acoustic characteristics testing, research and analysis on steel reinforced polyethylene composite pipes is conducted in this paper to provide strong basis for design of suitable phased array ultrasonic probe. The acoustic characteristic parameters are tested first, and the sound velocity is measured through twice reflected echo from the bottom surface. At the same time, the variation of the longitudinal wave velocity of the PE100 material under different temperature conditions is measured. The values of critical angle and acoustic impedance of the PE100 material are calculated by measuring the sound velocity. Then, the attenuation coefficient of the probes with different frequencies in the PE100 material is measured by the simulation calculation method and the actual measurement method, and the measurement attenuation coefficient of each frequency is further calculated. The results show that: (1) the sound velocity of PE100 material is 2,340m/s and the attenuation coefficient is 0.3dB/mm; (2) phased array ultrasonic inspection method can be used to make vertical incidence of longitudinal wave and avoid non-existence of the second critical angle; (3) 2MHz is the best frequency to inspect the body of steel reinforced polyethylene (PE) pipe.
Study on Compressive Strength of Cracked Concrete under Chloride Ion Erosion
Authors: Peng Tao 
Published: December 2019

Abstract
According to the orthogonal experimental design, the changes of compressive strength of shaft concrete with different lengths, widths and depths of cracks and different concentrations of sodium chloride solution were studied. The test results show that the higher the concentration of sodium chloride solution is, the stronger the compressive strength of concrete will be when the shaft concrete with fracture is soaked for 60 or 90 days. The order of cracks has the same order of influence on the compressive strength of concrete immersed in different concentrations of sodium chloride solution, that is, the depth of crack has the greatest influence, followed by the length, and the width has the least influence. The test combination with the minimum influence of crack on compressive strength of concrete is 4cm in length, 0.3mm in width and 1cm in depth.