bluuebunny/crossref_metadata_2025 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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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.
Analysis and countermeasures of the development trend of AI based on patents and policies
Authors: Zhang Xiaofeng
Published: December 2019

Based on the research of global AI patents, policies and sub-study research fields, the development of AI field in China and other countries will be compared and analyzed, so that the development dilemma faced by AI in China and its corresponding countermeasures will emerge.
Application of Improved Collaborative Filtering Algorithm in Recommendation of Batik Products of Miao Nationality
Authors: Ding Ning , Lv Jian , Hu Lai
Published: December 2019

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

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

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

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

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

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

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

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

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.
Synthesis of mesoporous MnO2 nanosheets and its application in toluene purification reaction
Authors: Chen Jiawei , Liu Guangyou , Feng Ying , Guan Jiankang , Dou Yongshen , Liu Sanmao , Li Yongfeng
Published: December 2019

Mesoporous manganese dioxide (m-MnO2) nanosheets were synthesized using octadecylamine (OTA) as template. The obtained m-MnO2 has rich mesoporous structures, high pore volume of 0.323 cm3/g and high surface area of 125.7 m2/g. While using the as-synthesized m-MnO2 as a carrier to support the noble metal active component of platinum, the obtained Pt-based supported catalyst exhibited excellent toluene purification activity: toluene conversion can be over 90% at low reaction temperature of 160°C.
Study on Direct Quenching and Tempering Process of 1000MPa Grade Low Alloy High Strength Steel
Authors: Gao Peng , Gao Ye , Chen Jun , Liu Zhenyu , Zhuo Yue , Sun Guodong
Published: December 2019

The direct quenching and tempering process of 1000MPa low alloy high strength steel had been studied in this paper. When the tempering temperatures were between 550°C and 610°C after direct quenching, carbides began to precipitate in the test steel, and the main microstructure were tempered martensite. When tempering temperatures were between 640°C and 670°C, the recovery stage of martensite lath basically ended and recrystallization began. The precipitated carbides grew up and the microstructure were mainly tempered sorbite. The results showed that the optimum tempering temperature range of the test steel was 610°C∼640 °C. The yield strength and tensile strength of the test steel were greater than 1000MPa, and the comprehensive properties of the test steel were better. It provided guidance for the production of 1000MPa high strength steel by direct quenching and tempering process in industry.
Evaluation and analysis of bearing capacity of bridges based on structure checking
Authors: Zhang Chunxia , Peng Lu , Lin Zhidan
Published: December 2019

To assess the bearing capacity of a bridge, this paper modified the structural resistance and load effect in the limit state equation by using the checking coefficient of bearing capacity, deterioration coefficient of bearing capacity and section reduction coefficient. Additionally, the paper compared the bearing capacity of the decision structure or the element and provided reference for evaluation and analysis of similar beam bridges.
Mechanical Analysis and Simulation of Intelligent Nursing Bed
Authors: Lang Jianzhi , Zhang Ziheng , Zhao Jintao
Published: December 2019

How to take better care of the elderly and disabled people has become an urgent problem. This paper focuses on the development of a set of intelligent toilet collection system for the sanitary problem of excreting on the bed, which can help patients automatically excrete. First of all, we designed the overall structure of the nursing bed, its frame and planar linkages. Then, we used the Adams software to make kinematics and dynamics analysis of the nursing bed’s mechanism. According to the data of the dynamic analysis, we conducted a finite element analysis of the frame of the nursing bed, and tested the strength of its parts. The results showed that the motion of each mechanism was stable, the experimental value was much less than the yield strength of the material. Consequently, it could meet the design requirements.
The Influence of Temperature on the Bonding Strength of the Interface
Authors: Liu Lei , Li Jinfei
Published: December 2019

In order to study the effect of temperature on the bond strength between the propellant and the lining interface, this paper designed a temperature test for the bonded test piece, and conducted a uniaxial tensile test and a stress relaxation test on the test piece. At the same temperature level, the maximum load on the specimen increases with the increase of strain. Under constant strain conditions, the stress on the bonding interface of the test piece gradually decreases with increasing temperature.
Aging Properties of Nitrile Rubber in Medium under High-Low Cyclic Temperature Environment
Authors: Kong Lingze , Dong Kehai , Chen Sitong , Xia Cheng , Pei Liguan
Published: December 2019

To obtain the aging mechanism of a certain kind of missile sealing nitrile rubber material under high and low-temperature cycle conditions, the nitrile rubber sealing ring was subjected to the accelerated aging test of high and low temperature circulating oil medium. The changes of compression set, mechanical properties, microstructure, molecular structure and dynamic mechanical properties under the condition of temperature-changing oil medium were studied. The dissociation energy of several important chemical bonds of nitrile rubber molecules was calculated. The test results show that the maximum tensile strength and elongation at break of special nitrile rubbers decrease with the increase of the number of cycles, and the compression set rate of nitrile rubber samples stored in oil medium increases gradually in the early stage of aging. Large, slightly restored in the late stage of aging, as the aging time increases, the side groups of the nitrile rubber molecules decompose and the main chain flexibility increases.
Synthesis of Pyridinium Pyrimidines C-Met Small Molecule Inhibitors
Authors: Xiong Hehua , Peng Fu , Tian Fajuan , Tang Qidong , Zheng Pengwu
Published: December 2019

Cancer has gradually become a serious threat to human health, and molecular targeted therapy has largely broken through the shortcomings of traditional treatment methods. C-met has been found to be overexpressed in a variety of cancer cells, and inhibition of its signaling pathway can effectively inhibit the occurrence of cancer. To explore the structure-activity relationship of the pyridinium pyrimidine cmet small molecule inhibitors, we synthesized the final compound A.
Research on Hub Lightweight Based on Lightweight Materials
Authors: Zhao Hongwang , Chen Yuanhua , Liu Xiaogang
Published: December 2019

Taking the hub of a certain vehicle as the research object, according to the actual operation conditions of the hub, the stress analysis of the hub is carried out to obtain the stress of the hub, which provides a reference for the lightweight design of the hub. The wheel hubs of structural steel, magnesium alloy and aluminium alloy are loaded and restrained respectively, and the displacement nephogram, stress nephogram and modal analysis diagram of the three materials are obtained. The results show that the three materials meet the requirements of stiffness and strength. Aluminum alloy is the best choice in terms of weight reduction effect and price.
Research on Risk Management Strategy of Direct Supply Support for Maintenance Material Manufacturers
Authors: Cheng Zhonghua , Zhang Yangyang , Ma Quanyue , Yin Xuyang
Published: December 2019

Direct supply support for maintenance material manufacturers is a new mode of support, which also faces many risks and problems. Aiming at the problem of how to effectively manage and control risks, considering the main risk factors in the support process comprehensively, on the basis of getting the weight of risk factors by using the analytic hierarchy process, the ABC classification method is used to classify and grade the risk factors, and then effective risk countermeasures and reasonable management and control suggestions are put forward respectively to ensure that the direct supply of maintenance material manufacturers can achieve the desired effect.
Induction Hardening Process of G18NiMoCr3-6 Steel
Authors: Tang Cai , Chen Bo , Fan Huiji
Published: December 2019

The microstructure and properties of G18NiMoCr3-6 steel after medium frequency. Quenching hardening with different process parameters and its heat treatment process optimizing were studied. The results show that the best combination is voltage 420V, cooling water flow 300L/h, moving speed 200mm/min. After medium frequency induction hardening process, the surface of G18NiMoCr3-6 steel generates uniform and small martensite, the strength and wear resistance significantly increases.
Low temperature synthesis and performance investigation of co-doped (Cr, Co)–ZrSiO4 ceramic pigments
Authors: Li Peng , Yang Qiuhong , Zhang Shaobo
Published: December 2019

In this paper, a green (Cr, Co)-codoped ZrSiO4 pigment was successfully prepared with Li2CO3 as mineralizer via solid-state reaction method at low temperature. The samples were characterized by X-ray diffraction, thermogravimetry and differential scanning calorimeter analysis, respectively. The XRD results reveal that the Li2CO3 as mineralizer can promote the formation of ZrSiO4 and decrease the synthesis temperature to 1000 °C that is 400–500 °C lower than the without mineralizer. The TG-DSC curve doped with Li2CO3 shows that zirconia and silica react to form zircon at 1000 °C. It is indicated that the Li2CO3 can reduce reaction activation energy and Si-O bond degree to promote zircon formation. After calcining at 1000 °C for 2h, the intensity of the colour in the samples varies from light green to dark green, depending on the co-doping content. The sample with 8mol% (Co, Cr) particles exhibit brilliant green (a*=-19.33), the value of a* is almost as good as commercial pigments, which indicates it is a potential candidate for ceramic pigments application. More importantly, the preparation method has the advantages such as reduce color ion doping, simplicity of process, and can also be used for preparing other zircon-based high-temperature colorants.
Pollution and Cooperative Treatment of Livestock and Poultry Waste: A Review of the Literature
Authors: Chen Yu , Wang Fang
Published: December 2019

By reviewing the current situation of livestock and poultry wastes pollution, the disposal methods, influencing factors and the related theories of cooperative treatment and literature on livestock and poultry farming pollution, it was found that most of the research on Cooperative treatment of livestock and poultry farming wastes in rural areas remained at the theoretical level, but less in practice. There are few studies on the development of a cooperative system and aquaculture subjects. The future research directions can be focused on the benefit evaluation of pollution control mechanism of livestock and poultry farming and the practical mode of cooperative pollution control of livestock and poultry farming.
RTU Hardware and Software Design in the Process of Nano Material Production Control
Authors: Zhang Li , Liu Menglin
Published: December 2019

“Nano-storage” based on organic molecules is a new type of data storage system with a trend to replace the currently widely used semiconductor memory devices. At present, there are two kinds of “molecules” that are potentially applied to “nano-storage”, one is molecular electronic devices, including molecular wires, molecular rectifiers, molecular switches, and molecular transistors; and another material that uses nanostructures, such as nanometers. Tubes, nanowires, and nanoparticles. In this paper, nanomaterials are used as raw materials to invest in R&D and hardware design of remote data terminal control software (RTU) of electrical engineering. The development of nano-charge storage such as characteristics of remote terminal controls and charge transfer is discussed. Embedded design method. The design steps of the embedded method and the overall structure of the control software are introduced. Finally, the characteristics and practical applications of the method are discussed.
Study on Abnormal Heating Mechanism of FRP Rod of Composite Insulator
Authors: Zeng Leilei , Zhang Yu , Yan Nianping , Miao Xuemei , Tong Chao , Zeng Xin , Zhou Longwu , Zou Yang , Liu Yan , Deng Zhibin
Published: December 2019

In recent years, abnormal heating phenomenon has occurred in composite insulators in China, which have brought potential trouble to the safe operation of power grid. The abnormal heating of fiber reinforced plastic (FRP) rod is an important reason for the temperature rise of composite insulators. In order to study the mechanism of abnormal heating of the FRP rod of composite insulator, three analysis methods of material including scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) are combined to make a microscopic analysis of abnormal heating phenomenon and sample of mandrel, which find that the abnormal heating mandrel of epoxy resin matrix and glass fiber were all deteriorated and accompanied by the invasion of moisture and the produce of HNO3. The experimental results show that polarization loss, partial discharge and resistance loss caused by deterioration of mandrel are the main reasons for abnormal heating of FRP core of composite insulator.
Novel Spray Cooling Plate for Thermal Control of Active Phased Array Radar
Authors: Jiang Shouli , Li Jia , Xiao Rui , Leng Tongtong , Zhong Jianfeng , Cheng Wenlong
Published: December 2019

Based on spray cooling technology, a new high-integrated subarray cooling plate with multi-nozzles is presented for thermal control of active phased array radar (APAR) with high heat flux density. Firstly, by building a three-dimensional heat transfer and flow model, the simulation work was performed to evaluate both thermal control performance of presented cooling plate for APAR. Then, a special experimental thermal control system for the new cooling plate was established to investigate the thermal performance of presented cooling plate under both static state and vibrative state are investigated. The results showed that the nozzles in the cooling plate got high uniformity in pray characteristics. And by using the new cooling plate, the temperature rise of heat source could be controlled below 43°C with heat flux density of 323.3 W/cm2. Also, the temperature rise of heat source under vibrant state was lower than the static state.
Structure Design and Finite Element Analysis of the 24m Array Truss
Authors: Yang Chong , Zhou Sibin , zhang Guoguang
Published: December 2019

In this paper, one type of 24m underwater array truss structure have been designed.Based on the array structure, analysis the force condition, the structure strength and stiffness were calculated, and the establishment of the array structure finite element model, combined with ANSYS analysis, truss strength and stiffness meet the specification requirements, the structure safe and reliable.
Study on External Limit Load and Instability Characteristics of C-shaped Bellows
Authors: Gao Qingdong , Duan Chenghong , Luo Xiangpeng
Published: December 2019

The metal bellow is the main flexible component in the pipeline compensator, which is used to compensate for the change of pipeline or structural displacement caused by thermal expansion and contraction, mechanical displacement or vibration, and is widely used in various fields of industrial production. In this paper, the critical load of the external pressure instability of the C-shaped bellow is theoretically deduced, and the corresponding finite element method is verified by this theory. On this basis, the finite element analysis is carried out for C-shaped bellows of different sizes. The influences of parameters such as diameter, wall thickness, wave radius, wave pitch and wave height on the limit load and critical instability load are clarified. The present study could provide an effective basis for the mechanical analysis and design of bellows, and also could provide a reference for the installation and use of bellows.
Application of Ergonomics in the Installation of Silage Mechanical Coating Module
Authors: Chen Mengjia , Lv Bing , Li Zequn , Wei Hao , Xue Zhenpeng , Li Yantao
Published: December 2019

In the high-speed innovation of agricultural machinery, the main means of competition among different brands has shifted from product function to good user experience. Modular silage machinery has gradually become the development trend of agricultural machinery industry. In order to reduce the purchase cost of large silage machinery, improve installation efficiency and operational comfort, the silage machinery is divided into modules based on the functional flow model. Taking silage mechanical coating module installation as an example, analyzing the installation difficulties from the perspective of ergonomics, the module division and installation process design of the lifting device, the design of the coating module armrest and the connection mode between the lifting device and the coating module are obtained. The installation plan of the silage mechanical coating module. It relieves the pressure on the lumbar spine of the operator during the installation process and provides a design basis for the installation of other modules.
Vibration Analysis of Corn Header Silage Module Rack Based on Technological System Evolution
Authors: Li Zequn , Lv Bing , Chen Mengjia , Xue Zhenpeng , Li Yantao , Wei Hao
Published: December 2019

The silage module of the corn header is transformed from the existing silage corn header. The tractor drives the silage module to harvest silage corn, and the performance of the silage module directly affects the quality of the harvest. In view of the strong vibration and unstable performance of the silage module during operation, it is necessary to perform vibration analysis on the frame of the silage module. The 3D model of the silage module was established by Solidworks. The modal analysis of the frame structure of the silage module was carried out by ANSYS. The first 6 modes of the frame and its natural frequency are obtained. By analyzing the intrinsic relationship between the mode and vibration of the silage module frame, the first-order mode of the silage module frame is obtained to resonate with the road surface excitation frequency. Using the technical system evolution rule to analyze the patents related to avoiding resonance methods, it is concluded that the current patent evolution is at a mature stage. It shows that there are enough ways to avoid resonance. Combined with the scientific effects of the How-to model and related patent cases, resonance is avoided by changing the structure of the frame to avoid the excitation frequency of the road surface.
Application of Computer-Aided Diagnosis Algorithm in CT Images of Urinary Calculi
Authors: Gao Yaming , Huang Laijian , Chen Bin , Liu Zhaobang
Published: December 2019

In recent years, computer-aided diagnosis has developed from pure theory to clinical trials, which has proved its feasibility and applicability in the diagnosis of breast cancer and pulmonary nodules. Therefore, combined with the actual medical background, computer-aided diagnosis is used in the analysis of urinary calculi components in patients, and the composition and structure of calcium oxalate calculi and anhydrous uric acid calculi are accurately analyzed, which has important guiding significance for the clinical treatment and prevention of urinary calculi.
The Design of Small-Metals Collector in Workshop
Authors: Zhao Yaping , Chen Zailiang , Weng Yunxian
Published: December 2019

A small appliance for collecting the small metals scattered in factories and workshops. This collector has rotary drum structure and uses the permanent magnet to absorb small metals. The design of the one action removal system helps collected metal parts is removed automatically instead of desquamated by hand. Part structure of this appliance can be combined by increasing the working width to satisfy different market demands in various conditions. The tests indicate that this appliance with simple structure, convenient operation and low cost has great market demand and application value.
FEA of Polyurethane Filled Double Skin Steel Tube
Authors: You Yuanyuan , Mi Xufeng
Published: December 2019

T Based on the nonlinear finite element software, the mechanical properties of polyurethane filled double skin steel tubular (PFDSST) members with different hoop coefficients and slenderness ratios under axial compression were studied by nonlinear finite element software.
Raw Materials Purchasing Strategy Model for Complex Products Based on Time Series
Authors: Peng Zhao , Guo Shunsheng , Wang Lei , Guo Jun , Du Baigang
Published: December 2019

A rolling purchasing strategy based on time series is proposed for the purchase of raw materials in the manufacturing process of complex products. The core idea of this strategy is to implement rolling procurement under the conditions of normal processing. According to the future price fluctuation of raw materials, a multi-stage purchasing model is established to minimize the total cost, solve the optimal purchasing quantity in each stage and implement the optimal purchasing quantity in the current period; when the next raw material procurement sequence is reached, according to the new order demand of the enterprise, update the information of time series, raw material demand, future price and other aspects of the model to obtain a new multi-stage procurement model, and then solve the optimal procurement volume in the current period, and so on.
Research on Optimizing Model of Product Availability in Warranty Period
Authors: Cheng Zhonghua , Wang Qian , Bai Yongsheng , Wang Qiang , Zhao Rudong , Chen Yong
Published: December 2019

In order to improve the availability of products during the warranty period, a maintenance strategy combining incomplete preventive maintenance with two different degrees of maintenance is adopted to solve the problem of long downtime which is caused by failure of products during the warranty period. Based on the theory of incomplete maintenance, the availability model is established. Through an example, it is proved that the model can improve the availability of warranty products, and the scope of application is given. Sensitivity analysis is conducted for some factors affecting availability.
A review of polyaniline based materials as anodes for lithiumion batteries
Authors: Chen Yifan
Published: December 2019

Conducting polyaniline is of great research interest to use as anode material for lithium-ion batteries. However, the development of polyaniline still remains significant challenges. For example, nowadays, it is not easy to effectively improve the electrochemical performance of ions batteries and promote its application. Herein, we introduce the structure, synthesis and properties of polyaniline firstly, then we summarize the recent advances and applications of PANI based hybrid materials in anodes for lithium-ion batteries. Special attentions were given on the following items: carbon-polyaniline composite, silicon-polyaniline composite, and metal oxides-polyaniline composite. The superior chemical nature of polyaniline enables it is promising to use as advanced anode material for Lithium-ion batteries.
Preparation and optical properties of boron-doped Si-Na-Al-Zn photo-thermal-refractive glass
Authors: Li Peng , Zheng Ruilin , Yao Xiang , Wei Wei
Published: December 2019

Photo-thermo-refractive (PTR) glass, which has the advantages of high refractive index modulation value, large working bandwidth and wide environmental adaptability, is an excellent material for preparing volume Bragg grating (VBG). However, the application of PTR glass is limited because of its high melt processing temperature and high optical loss. The introduction of boron into PTR glass can significantly reduce the melting temperature. In this study, boron-doped Si-Al-Na-Zn PTR glass was prepared at a low temperature by the high-temperature melting method, and its temperature–viscosity relationship, heat treatment procedure and optical properties were investigated. The results show that the introduction of boron into PTR glass can significantly reduce the high-temperature viscosity of PTR glass. The melting temperature is lower than 1,400 °C, and the optimum nucleation and crystallisation temperatures are 490 °C and 590 °C, respectively. The optical transmittance of UV-exposed and heat-treated glass is more than 90%, which indicates its excellent optical properties and its applicability for use in preparing VBG with high diffraction efficiency and low optical loss.