bluuebunny/crossref_metadata_2025_split huggingface dataset:
Design of Control System for 6-DOF Manipulator
Authors: Li Xianglong , Quan Zikun , Liu Dongping 
Published: March 2020

Abstract
The manipulator is a complex system with high precision, high nonlinearity and strong coupling, the design of the manipulator control system has an important influence on the stable operation of the manipulator. The structural design, drive design and hardware design of the manipulator are the key contents of the manipulator, which needs to be coordinated and controlled as a whole. Through the establishment of a six-degree-of-freedom manipulator dynamics model, and the design of the manipulator control system is conducted in this paper.
Study on the Synthesis and Photothermal Conversion Property of Polyaniline
Authors: Bao Lihong , Liu Xin 
Published: March 2020

AbstractA series of polyaniline (PANI) with different HCl/aniline and DBSA/aniline molar ratio was synthesized in this paper. The structure of PANI was characterized using IR spectroscopy. The effect of pH, thermal stability and photothermal conversion properties of PANI were investigated. The results showed that the IR spectrum presented typical absorption peaks of PANI-ES. The pH had a big influence on the optical property of PANI. The PANI had high thermal stability in all HCl/aniline molar ratio. The molar ration of DBSA/aniline can influence the photothermal conversion of PANI, whereas the doped PANI showed better photo thermal conversion efficiency than that of dedoped PANI.
Structural Design of Tool Head of Pipe Dredging Device
Authors: Jia Yufei , Shang Mengyu , Sun Haojun , Pang Chuang , Liu Junjie , Yang Xu 
Published: March 2020

Abstract
In the cold season, pipelines are prone to icing-induced clogging, causing great inconvenience to people’s production and life. To solve the icing-induced clogging of the pipeline, analysis was made on the reason why the original device fails to break the ice, to provide some guidance for conducting an innovative design of the cutter head of the device. Based on the actual needs for the cutter heads in the course of ice-breaking, a parallel inclined spherical rotary cutter head was proposed, and its 3D model created with the help of a modelling software. Through the operational and arc-traversing performance analyses of the cutter head, the relationship between the radial direction and the axial direction of the cutter head was constructed. The pressure relationship of the device was analysed. The conclusion was drawn as follows: the designed cutter head can improve the effectiveness of the device on ice-breaking and reduce the requirement for the structural intensity, providing a significant basis for the development of its physical prototype.
Deflection Calculation of Steel-Concrete Composite Beams Considering Effects of Shear Lag and Slip
Authors: Hu Di , Wang Yafei , Ding Faxing 
Published: March 2020

Abstract
Based on the proposed longitudinal deformation equation considering the slip between steel and concrete and the shear lag, the energy variation function is deduced, then the formula to calculate the deflection of steel-concrete composite beams considering the effects of shear lag and slip under the action of uniformly distributed load is derived. A group of experimental steel-concrete composite beams with different space of stud is made and the experimental data are compared with theoretical values showing that the formula holds high calculation accuracy.
Effect of aging treatment on corrosion resistance of Inconel 718 fabricated by selective laser melting
Authors: Liu Xuenan , Zhang Runyu , Feng Sengnan , Li Huixiang , Wang Yizhe , Gong Jianhong , Sun Hui 
Published: March 2020

Abstract
The microstructure and corrosion resistance of Inconel 718 alloy made by selective laser melting (SLM) by aging heat treatment (AT) were studied. After the solution treatment at 1050°C, the aging treatment temperature ranges from 600°C to 800°C. Scanning electron microscopy showed that γ” was precipitated out of the γ austenite matrix, with σ decrease in delta phase. The morphology, distribution and formation mechanism of precipitates in these microstructures were analyzed and discussed. Open circuit voltage curve (OCPT), alternating current impedance spectrum (IMP) and TAFEL curve (TAFEL) were tested by electrochemical workstation. Electrochemical corrosion results and corrosion resistance of samples after four different heat treatments were analyzed, and the best aging heat treatment mode and multistage aging treatment were discussed.
Structural Optimization of Machine Tool Column Based on Dynamic Characteristic Analysis and Response Surface
Authors: Bao Zhongfu , Zeng Dejiang , Wu Darao 
Published: March 2020

Abstract
Based on digital simulation technology, the dynamic characteristics of a NC machine tool column are studied, including modal analysis and harmonic response analysis. Then the response surface of design parameters and indicators is obtained based on the experimental design. Finally, the optimal design is obtained by using genetic algorithm based on response surface.
Effect of MWCNTs’ Content on the Properties of Polyimide Composite Molding Materials
Authors: Chen Xiaoqi , Wang Zhengzheng , Xu Haoran , Zhou Haijun , Zhou Mengmeng , Li Yantao 
Published: March 2020

Abstract
A series of MWCNTs/PI composite molding powders with different MWCNTs contents were prepared by ultrasonic dispersion in situ polymerization and blending method, and the samples were prepared by molding. In this experiment, 3, 3’, 4, 4’ - biphenyltetracarboxylic dianhydride (BPDA), pyromellitic dianhydride (PMDA) and 4, 4’ - diaminodiphenyl ether (ODA) are taken as the main raw materials and MWCNTs as reinforcement materials. The molecular structure, thermal stability, mechanical properties, wear resistance and hardness of the composites were characterized. Results showed that mechanical properties of the composite molding materials prepared by ultrasonic dispersion in situ polymerization are better than those prepared by dry mixing method. The composite molding materials showed the best properties at the MWCNTs content of 0.5wt%. What’s more, the tensile strength and elongation at break are 108.9MPa and 4.5%, which are 26% and 23.6% higher than those of pure PI.
Hot-pack Accumulative Roll-bonding (HP-ARB) Process of Ti-44Al-5Nb-1Mo-(V, B) Alloys
Authors: Li Tianrui , Liu Guohuai , Guo Ruiqi , Wang Xiuqi , Wang Zhaodong 
Published: March 2020

Abstract
Ti-44Al-5Nb-1Mo-(V, B) alloy preforms were processed under hot-pack accumulative roll-bonding (HP-ARB) process directly from HIPed ingot. A thin crack-free HP-ARB sheet was obtained. The corresponding microstructure evolution, alloy element distribution, and tensile properties were systematically studied. The alloy matrix were measured as ∼703-844 μm, while the defect-free bonding interfaces were measured as ∼96 and 221 μm. Near-lamellae and fine near-duplex microstructure were characterized in the bonding interface and the sheet matrix, respectively. The differences of stress state between the alloy matrix and the plate edge, and large deformation strain during HP-ARB are considered to be the main factors to form the microstructure characteristics. After HP-ARB, the sheet exhibited high performance at room-temperature (RT) as well as high-temperature. Ultimate tensile stress (UTS) of 863 Mpa and ductility of 1.71% were exhibited at RT. The 800 oC and 850 oC UTS/ductility were 754 Mpa/7.24% and 599 Mpa/67.5%, respectively. The pure bonding interface and fine homogeneous microstructure contributed positively to the RT and high-temperature tensile properties.
Size Effect of Ultra Pure Ti Thin Strip under Asymmetrical Rolling
Authors: Song Meng , Yin Libo , Bai Fengmei , Huang Zhenyi , Liu Xianghua 
Published: March 2020

Abstract
In order to study the size effect on properties of ultra pure Ti tensile tests were performed with ultra pure Ti foil (thickness range from 30μm to 280μm) by asymmetrical rolling. A pronounced size effect was observed at thickness of 34μm. The results were shown that the ultimate strength were increased as sample thickness down from 280μm to 34μm, however, were decreased as the thickness from 34μm to 30μm with ultrahigh strain. These features seemed to be link to the increasing of fraction of surface grain to volume, which led to the less districting on dislocation slip.
Parameter Simulation and Analysis of Rotary Feeder
Authors: Dong Fang , Li Yong 
Published: March 2020

Abstract
As a kind of continuous conveying equipment for powder and pellets, rotary feeder is widely used in the processing of non-staple food products, chemical industry production, metal smelting, wine brewing and terminal transportation because of its convenient control, high reliability and stable transportation. Such industries have an important position in the bulk material conveying industry. Different process parameters and structural parameters of the rotary feeder will have an impact on the conveying effect. The process parameters affecting the conveying effect mainly include rotor speed and material filling coefficient. In this paper, the dismantling rotary feeder with the rotor diameter of Ф62 is studied by simulation and test, and the influence of rotor speed and material filling coefficient on the conveying effect is analyzed.
Potential Transparent Supercapacitor Electrode Materials
Authors: Fan Ziyan 
Published: March 2020

Abstract
Supercapacitor utilizes the nano-scaled pores to increase the surface area indefinitely and shortens the distance between the positive and negative plate, on the account that some larger particles cannot fit into the pores. According to the capacitance equation “capacitance = εrε0 (area/distance),” as the distance decreasing and area increasing, the magnitude of the capacitance is tremendously magnified. A transparent supercapacitor describes a supercapacitor that has a high optical transmittance. If the intensity of light that transmits across the substance is higher than the rate that it is blocked or reflected. The substance possesses a transparency. The flexibility of transparent supercapacitors is another important area of studies. It generalizes a combination of stretchability, bendability, twistibility, or compressibility. In real life, it’s important to obtain the optimal optical transmittance, flexibility, and electrical conductivity for future devices such as smart glasses. These characteristics enable us to develop something more complex and advanced in the future.
Microstructure characterization and micro-hardness of Fe-9Cr ODS alloy produced by laser powder bed fusion
Authors: Shi Yingnan , Lu Zheng , Xie Rui 
Published: March 2020

Abstract
Oxide dispersion strengthened (ODS) alloys have been considered as the promising candidates for advance Generation-IV fission reactor application due to excellent radiation tolerance and high temperature mechanical properties but traditional manufacturing process is complex. A 9Cr-ODS alloy with nominal composition of Fe-9Cr-1.5W-0.3Ti-0.3Y2O3 (wt %) was produced by laser powder bed fusion (LPBF) which is a laser additive manufacturing technique. The microstructure and nanoscale oxide particles were characterized by using optical microscope (OM), electron backscattered diffraction (EBSD) and transmission electron microscopy (TEM). The micro-hardness was tested by hardness tester. The results showed that the equiaxed grains with an average size of 3.8 μm were obtained. The dispersed oxide particles with 10-20 nm were observed in LPBFed 9Cr-ODS alloy. The micro-hardness of built sample was about 460 HV.
Numerical Simulation Study on Bolted Joints of Steel-wood Structures
Authors: Zheng Yang , Xu Chunmei 
Published: March 2020

Abstract
As one of the most widely used rigid connections, bolted joints have the advantages of convenient loading and unloading, increased prestressing to prevent loosening, and no change in material composition at the joints. In this paper, six sets of test pieces are designed, and the monotonic loading is performed. The bearing capacity of the joints under the two parameters of bolt margin and wood characteristics is analyzed, and compared with the theoretical value, the reliability of the finite element simulation results is increased.
Selection of optimal vibration parameters molding reinforced concrete products
Authors: Vasiliev V G 
Published: March 2020

Abstract
The efficiency of reinforced concrete products vibration moldingdepends largely on the rational modes of vibration on the compacted concrete mix and the selected parameters of the equipment used. The article summarizes the results of experimental studies on the compaction of concrete mixes in molds that are freely installed on the vibration platform through elastic pads. It is shown that the forming concrete products in non-fixed mold provides for effective compaction by selecting the parameters of the oscillating system “vibrating table - elastic element - a mold with concrete mix”.The obtained results open a new prospect in the development and improvement of vibration moldingmachines with free set molds.
Organization of recycling of construction scrap with the use of mobile crushing plants in Russia
Authors: Gustov D Yu 
Published: March 2020

Abstract
The issues of recycling construction scrap during the demolition of buildings, taking into account the specifics of the work on the demolition of buildings in Russia. The feasibility of the formation of “distribution cards” demolished buildings with an indication of the type and predicted amount of construction scrap. A typical extended set of construction and road machines has been proposed, which should be used when using mobile crushers. Suggestions are given on the mechanism for forming a set of machines according to the criterion of specific reduced costs. The calculated dependencies are given. It indicates which machines should be considered when choosing a kit, and which machines can be excluded from the analysis.
Assessment of resources of road machines working in the conditions of tropical climate
Authors: Zorin Vladimir , Tuan Le Tchong 
Published: March 2020

Abstract
In this article results of researches are considered, formulas full gamma percent resource T

f.γ
and a gamma percent resource before the first major repair ofT

r.γ
(is developed for definition at γ=80%) road-building machines, according to technical condition and operating conditions of the machine in the tropical climate of Vietnam. The corresponding values of resources of road-building machines in Vietnam were at the same time defined that formed a basis for exact planning terms of carrying out construction works, to make the reasonable diagram of maintenance and repair of machines for each climatic zone of Vietnam.
Ultimate loads, arising on the blade during exploitation, according to existed design positions for calculations
Authors: Saveliev A G , Mikhailovskaya V A 
Published: March 2020

Abstract
In the paper a method for determining external loads on the working equipment of the bulldozeris presented. Using this method, it was revealed that the computations using the existing algorithm allow to obtain overestimated values of the loads, whatleads to a significant increase in the metal intensity of the machine design. Also in the article is shownaway for carrying outan experiment on the bulldozer stand, described the positions of bulldozer working equipment, according to which it will be tested and made the conclusions about the research.
Influence of the tilt of the sprung elements of the construction of car cranes on cargo stability
Authors: Mekhonin O N , Shchetkin R V , Pugin K G 
Published: March 2020

Abstract
This article describes the key features of determining the coefficient of cargo stability of automotive cranes on the base chassis, taking into account the roll of sprung structural elements. The possible factors affecting the error of the cargo stability calculation are identified, and the ways of solving this problem are proposed.
Evaluation of savings on operational services from innovative energy-saving materials
Authors: Romanova A I , Berval A V , Burkeev D O , Safina R S , Ilyina E V , Egorov D A 
Published: March 2020

Abstract
Innovative infrastructure projects, as a rule, are aimed at creating or some modification of infrastructure objects, which are characterized by large-scale, high degree of capital intensity, their long-term implementation, freezing investments for a long period due to a long payback period. The most fertile post for the implementation of infrastructure projects is construction.A high share of the economic effect is explained by the fact that the modern world is focused on increasing the efficiency of each innovation, thereby saving on the costs of natural resources, which affects environmental stabilization and the rational use of the resources received. In this aspect, investments in green building can be considered particularly advantageous, allowing us to talk about the double effect of innovations in construction: here we can also reduce the environmental burden on nature with the help of new technological solutions at the stage of development and application of new environmentally friendly materials (effect for the manufacturer), and comfort for a consumer of highly environmentally friendly construction products in an environmentally friendly area (effect for the buyer) in a large metropolis.
Optimizing the location for the enterprise recycling the forestry production waste
Authors: Tyurin N A , Gromskaya L Ya , Antonova T S , Kalyashov V A , Artemiev V N 
Published: March 2020

Abstract
The article discusses the optimization of the location of the enterprise for recycling the wood waste from logging and wood processing industries. A promising area of waste recycling is the production of wood-fuel pellets as an alternative renewable energy source. The raw material supply of pellet production means a lot of collection activities, in which transport costs play a decisive role. Sources of raw materials and consumers of finished products are distributed over vast territories. The paper proposes an integrated approach to solving the problems of the territorial location of the recycling plant based on logistic methods and the use of geographic information systems. The paper presents a mathematical model and a technique for optimizing the territorial distribution of pellet production by the criterion of the minimum transportation costs for raw materials. The developed methodology takes into account the existing infrastructure. It involves the full use of sources of raw materials, and also allows us to choose the best option for the location of the enterprise, taking into account the social and economic possibilities of construction. The technique has great versatility, which allows it to be used to place enterprises of various fields of activity. It clearly reflects the results of the problem solution, which simplifies the decision-making process on the location of enterprises.
Optimizing the number of anti-skid device for vehicle
Authors: Sakhapov R L , Makhmutov M M 
Published: March 2020

Abstract
We can image the shift work of the vehicle in the form of: a) the movement of the unit from the park to the object of work; b) work on the object; c) the movement from the object to the park. Depending on the condition of the roads, as well as the weather conditions of spring and autumn, the driving wheels of the vehicle can be equipped with the hooks just before leaving, on the road or directly at the work site. In any case, it is necessary to spend a certain amount of the shift time for installation and disassembly of the anti-skid device.
Open gear train as a source of oscillations of the construction machines mechanisms
Authors: Skel V I 
Published: March 2020

Abstract
The article considers kinematic, force and parametric characteristics of an open cylindrical gear train of the rotation mechanism of an excavator as sources of oscillations of mechanisms with a tooth frequency. The author builds a two-mass dynamic model with an internal perturbation in the form of a variable gear ratio and taking damping into account. The paper shows that the main perturbations can be the difference between the basic pitches of the gear and the wheel and the error of the involute profile of the side surface of the teeth. These errors occur during the manufacture of a gear pair and due to wear of the teeth. The errors in the relative position of the gear and wheel teeth, the variable tooth hardness with an overlap ratio greater than one, friction in the engagement for open gear train of a large module and manufactured by 8 … 9 degrees of accuracy, play a significantly smaller role in the excitation of oscillations. The effect of the considered sources of oscillations should be taken into account in the resonant modes of the mechanism operation.
Implementation of laboratory works on the modern laboratory equipment
Authors: Drozdov A N , Belkina E R 
Published: March 2020

Abstract
The Department “Mechanization of Construction” of Moscow State University of Civil Engineering continues to work in the implementation of the concept of development of educational disciplines in terms of the widespread use of computers and software in the educational process. This paper determines the main characteristics of two types of impact machines: electric hammers with vacuum magnetic angle valve and impact wrenches using NATIONAL INSTRUMENTS equipment and, in particular, the NATIONAL INSTRUMENTS ELVIS workstation.
Improving the level of traffic service on the road network of cities
Authors: Solodkiy A I , Chernikh N V 
Published: March 2020

Abstract
The problems associated with the formation of congestion and the low quality of transport service continue to be relevant for modern megacities. One of the parameters that evaluates the effectiveness of the organization of traffic, is the level of service traffic. The article provides foreign experience of using this parameter. The need to improve the level of traffic service on the road network by using a set of measures is noted as the main problem. The authors give a classification of event types. The paper notes that only the integrated application of the measures specified in the classification, taking into account the restrictions imposed and the existing traffic conditions, has the greatest effect.
Experimental studies of the dependence of the heterogeneity coefficient of the mixture on the technological parameters in the mixer with a variable working chamber
Authors: Lozovoi N M , Radinskaya L V , Lozovaya S Y 
Published: March 2020

Abstract
Mixing bulk materials is widespread in various industries: construction, agro-industrial complex, chemical technology, energy industry and many others. At the same time, the task of preparing homogeneous mixtures is associated with a number of difficulties, such as a wide range of changes in the physicomechanical properties of the processed materials, requirements for the quality and composition of the product, productivity, energy and metal consumption, etc.