bluuebunny/crossref_metadata_2025_split huggingface dataset:
Circuit Modelling for Dielectric Layers in Electrowetting Devices
Authors: Yu Kun , Wang Weiqiang 
Published: November 2019

Abstract
In this paper, we present an electromechanical model for the electrowetting based micro-droplet driving device. We developed an equivalent circuit for this microfluidic device by using the method of lumped parameter electromechanics. The voltage distributions across the device dielectric layer and the droplet were calculated based on the model. The actuation force for the parallel-plate device was derived according to the principle of virtual work. Based on the force calculation, we studied the effects of droplet conductivity, dielectric constant, and the electric field frequencies on the electrical force exerted on the liquid droplet.
Preparation and Characterization of Glass Ceramics Containing SrTiO3
Authors: Zhu Xiaowei , Zou Xiangyu , Zhang Hongbo , Song Qiong , Su Chunhui 
Published: November 2019

Abstract
The glass ceramics containing SrTiO3 crystals were successfully synthesized by high temperature melting crystallization. The optimum technological formula was determined by orthogonal experiment. The heat treatment system of the glass samples were determined by differential scanning calorimeter analysis (DSC). The effects of heat treatment temperature and time on crystal formation and grain size were discussed in detail. The ideal heat treatment condition is at 950°C for 3h. The microstructure and phase structure of glass ceramics were analyzed by scanning electron microscope and X-ray diffraction respectively, which indicate that SrTiO3 crystal were precipitated uniformly in the glass matrix.
Study on High-Temperature Synthesis Ejecting Technique of ZnO Nanomaterials
Authors: Tang Xiangjun , Li Junshou , Zhao Fang , Han Kai , Song Bin 
Published: November 2019

Abstract
ZnO nanomaterials were prepared by self-propagating high-temperature synthesis ejecting technique with Al, Cu2O, ZnO and SnO power reagents as raw materials. The structure and morphology were characterized by XRD, SEM and FTIR methods. The synthesis mechanism of ZnO nanomaterials was discussed. The results showed that single ZnO with hexagonal wurtzite structure was prepared by high-temperature combustion synthesis ejecting method. The products exhibited nanowire morphology, accompanied by granular and flaky morphologies. According to the analysis, the formation mechanism of ZnO nanomaterials is as follows: The reactant is heated to the molten liquid state by exothermic reaction of thermite powder, a self-ejecting system consisting of porous film with high melting point and low density, molten substances to be prepared and ejecting additives is formed by utilizing the difference of specific gravity and melting point between compounds. The substances to be prepared are ejected through the holes of the porous film by the gas released from the ejecting additives, and finally nanomaterials are obtained.
Electromechanical Properties and Temperature Stability of 1-3 Type PZT/Epoxy Piezoelectric Composite
Authors: Liu Dakang , Yao Weizeng , Zhou Chunming , Zhang Jialiang 
Published: November 2019

Abstract
1-3 type PZT5H/epoxy composites were fabricated via dice and fill method, by which the PZT5H ceramic blocks were processed into a series of rod arrays with kerf width of 120 μm ∼ 260 μm and pillar width of 120 μm ∼ 450 μm. Proper thickness was chosen to guarantee that the aspect ratio (height/width) is higher than 3. Piezoelectric properties of the 1-3 composites as a function of ceramic volume fraction and aspect ratio were investigated. The resultant composites show high piezoelectric coefficient d
33>500p C/N, low mechanical quality factor Q
m = 2.9 ∼ 7.7, enhanced electromechanical coupling coefficient k
t=0.66∼0.74 and low acoustic impedance Z = 9 ∼ 17 Mrayl, as well as a good temperature stability in the investigated temperature range from -50°C to 150°C.
Electrical Properties of La and Sm Co-Doped SrTiO3 for Mixed Ionic-Electronic Conductor
Authors: Shan Ke , Zhai Fengrui , Li Nan , Yi Zhong-Zhou 
Published: November 2019

Abstract
The mixed conductor materials La0.3Sr0.7SmxTi1-xO3-δwas prepared via sol-gel method. The influence of Sm content on the electrical properties of La, Sm co-doping SrTiO3 was investigated. Sm-doping increased the sinterability of La0.3Sr0.7SmxTi1-xO3-δ. With the Sm-doping increasing, the total electrical conductivity and the ionic conductivity of La0.3Sr0.7SmxTi1-xO3-δ increased. The optimized La0.3Sr0.7Sm0.08Ti0.92O3-δ sample exhibits the total electrical conductivity in the order of 0.132-0.315 S·cm−1 at 500-900°C. The ionic conductivity for La0.3Sr0.7Sm0.08Ti0.92O3-δ was 9.22×10−3 S·cm−1 and increased about 266% compared with La0.3Sr0.7Sm0.04Ti0.96O3-δ at 950°C. The possible charge compensation mechanism in La0.3Sr0.7SmxTi1-xO3-δ was discussed.
Synthesis, Microstruture and Electromagnetic Performance of NixZn1-xFe2O4 Ferrites with Different Ni/Zn Ratios Prepared by a Novel Molten Salt Method
Authors: Yang Pao , Qi Hongbin , Peng Zhijian , Fu Xiuli 
Published: November 2019

Abstract
NixZn1-xFe2O4 ferrites (x=0.0∼1.0 with a step of 0.1) were prepared by a novel molten salt method. The effects of Ni/Zn ratio on the microstructure and electromagnetic performance of the acquired ferrites were investigated. All the samples are composed of a pure ferrite with cubic spinel structure, and their microstructures are quite homogeneous. With the increase of Ni content, the lattice constant of the samples decreases, the grain size fluctuates in a very narrow range around 2.0 μm, and the saturation magnetization firstly increases and then decreases, presenting the maximum value with x=0.6, while the coercivity basically displays an inverse trend to the saturation magnetization. In the frequency range from 1 M to 1 GHz, the initial permeability of the acquired NixZn1-xFe2O4 ferrites decreases, the cut-off frequency increases, and the magnetic loss decreases with increasing Ni content.
Influence of Annealing Temperature and Time on Phase Component of 8YSZ Powders Prepared by APS
Authors: Zhao Xiaohui , Wang Ziyuan , Pan Wei 
Published: November 2019

Abstract6∼8wt% yttria-stabilized zirconia (8YSZ) ceramic powders with high t’ phase content could be obtained by air plasma spraying (APS). However, a small amount of high-temperature c phase was contained in APS-8YSZ due to the fast cooling rate, which was required to be transformed into the t’ phase through heat treatment. In this study, APS-8YSZ powders were annealed at 1000-1200°C for 30-150 min to investigate the influence of annealing temperature and time on the phase components of APS-8YSZ powders. As a result, the suitable heat treatment conditions are determined by analyzing the phase constitutions of annealed powders through XRD and multi-peak fitting, wherein, the optimal annealing parameter is 1000°C for 90 min. Besides, dense 8YSZ bulk ceramics with pure t’ phase and fine-grained structure were prepared by SPS at 1300°C for 5min.
Isothermal Oxidation Behavior of TiN Coatings Deposited by Closed Field Unbalanced Magnetron Sputtering
Authors: Zhang Hao , Chang Weijie , Long Lin , Hu Jinkang , Li Xiangrui , Li Jun , Duo Shuwang 
Published: November 2019

Abstract
TiN coatings were successfully prepared by closed field unbalanced magnetron sputtering (CFUBMS) in this study. The microstructure, composition, phase structure, hardness and adhesion of TiN coating were investigated by SEM, EDS, XRD, and nanoindentation/scratch techniques, respectively. Emphatically, the oxidation behaviors of TiN coating were analyzed and discussed at 550, 600 and 650°C, respectively. Results showed that TiN coatings are golden with loose pyramidal structure, and the phases in TiN coating are mostly TiN and a small amount of Ti. The hardness, elastic modulus and bonding strength of TiN coating are about 23 GPa, 288 GPa and 35 N, respectively. The isothermal oxidation tests in a thermal analyzer at 550°C and 650°C for 19 h suggested that TiN coating has better oxidation resistance at 550°C because it was approximately intact at 550°C. However, the oxidation experiments in a muffle furnace at 600°C and 650°C for only 10 h indicated that TiN coatings were slightly oxidized. Therefore, above 600°C, TiN coating will fail due to the formation of the brittle rutile TiO2 as the oxidation time increases.
Al Content Effects on Mechanical and Tribological Properties of Cr/CrN/CrAlN Multilayer Nanocomposite Coatings
Authors: Zhang Xue , Chang Weijie , Zhang Hao , Zhou Zichao , Xie Shengliang , Duo Shuwang 
Published: November 2019

Abstract
In this study, four Cr/CrN/CrAlN multilayer nanocomposite coatings with various Al content controlled by Al target power were successfully prepared on 316L stainless steels by plasma enhanced magnetron sputtering (PEMS). The surface morphology, chemical composition, phase structure and surface roughness of the coatings were characterized by SEM, EDS, XRD and AFM, respectively. The micro-hardness, Young’s modulus and adhesion of the coatings were measured by nano-indentation and nano-scratch, respectively. The friction and wear behavior of the coatings was investigated by a friction and wear tester. The effects of Al content on the microstructure, mechanical properties and wear resistance of the coatings were studied in detail. Results show that Al content in coatings increased with the increase of Al target power. The coatings exhibited the NaCl crystal structure. As the Al content increased, the hardness, Young’s modulus, bonding force and wear resistance of the coatings increased first and then decreased. The Cr/CrN/CrAlN coating with Al content of 37.8% has the optimal comprehensive properties.
Manufacturing of Electrical Dryer Machine for Food and Fruit Products
Authors: Efendi Adhan , Nugraha Aditya , Baharta Ridwan 
Published: November 2019

Abstract
Indonesia is a country with a tropical climate that has two seasons, namely the dry season and the rainy season. In the dry season, sun drying is the most widely used method for agricultural products. In the rainy season, people who open businesses in the food processing sector have difficulty predicting uncertain weather. The community needs solar thermal energy to dry food ingredients in the form of opak, tubers, fruits, etc. In the rainy season, the value of production has decreased. This study aims to create a drying machine that can help people to dry various types of food and fruit products. The research was carried out in several stages, namely field observation, literature study, design, manufacturing, and performance testing. The study states that: (1) the manufacturing process of electrical machine dryer was done in three stages: the initial stage, advanced stage, and the final stage. (2) the trial of an electrical dryer machine was used to dry opak and banana. Data obtained in the form of opak before drying weighs 3.4 ounces and after drying to 2.2 ounces. Whereas the banana before drying weighs 7.3 ounces and after drying to 4.5 ounces; (3) electrical dryer machine is very helpful in the process of drying food processed products in Subang Regency. Keywords: manufacturing, electrical dryer machine, opak and banana.
Reliability Analysis of Belt Conveyor Based on Fault Data
Authors: Li Meiyan , Yingqian SUN , Luo Chuan 
Published: November 2019

Abstract
In order to improve the accuracy of the reliable analysis of the belt conveyor, based on the belt conveyor fault data, firstly fit the probability density distribution function of the belt conveyor fault interval time. According to the characteristics of the fault data, it is inferred that it may obey the Weibull three-parameter distribution. The Weibull distribution model is obtained by combining the least squares method with the correlation coefficient method, and the accuracy of the model is verified by d test. Finally, the reliability of the belt conveyor is analysed, and the measures to improve the reliability of the belt conveyor are given, which provides a theoretical basis for the daily maintenance of the belt conveyor.
Manufacturable Gradient-Variable Cellular Structures Design
Authors: Li Gang , Yao Yuan 
Published: November 2019

Abstract
Topology optimization (TO) has been widely used in the field of additive manufacturing (AM), but the structure designed by the density-based optimization method has obvious material gradient and complex internal structures, which are difficult to be directly manufactured with specific process. This paper proposes a multi-scale design method for designing cellular structure with topology optimization. Firstly, micro units with variable density are designed to support smooth interconnections. Then, we provide a assembling method to generate models with density distributions similar to topology optimization method, while guarantee the manufacturability of the structures. The experimental results show that the generated model does not need support in fabrication, and retains the optimized mechanical properties, which can be used as a TO based fill pattern for 3D printing.
Research on Motion Characteristics of Single Particle Third Body in Braking Process Based on W-M Fractal Feature
Authors: Sha Zhihua , Ru Guotao , Yin Jian , Liu Yu , Ma Fujian , Yang Dapeng , Zhang Shengfang 
Published: November 2019

Abstract
In order to explore the motion characteristics of the third body particle in the friction of the rough braking interface, based on W-M fractal theory and elastoplastic mechanics theory, the finite element model of the three body micro-extrusion shearing process of rough contact surface is established. The influence of the braking parameters on the motion characteristics of the single-particle third body is analyzed. The analysis results show that the three body contact steady state increases with the increase of brake pressure, and the shear speed affects the three body contact vibration. An increase in the friction factor accelerates the third body discharge friction gap to exacerbate the wear condition.
Study on Thermal Erosion Process of SiCp/Al Composite Material in EDM
Authors: Liu Yu , Wang Bingchao , Zhang Wenchao , Zhang Shengfang , Ma Fujian , Yang Dapeng , Sha Zhihua 
Published: November 2019

Abstract
SiCp/Al composites are composed of two different material properties of aluminium matrix and SiC particles. In order to deeply study the erosion process of SiCp/Al composite in EDM, a single pulse discharge model of SiCp/Al composites was established. The melting and solidification model and the volume of fluid (VOF) model in Fluent software were used to simulate the thermal erosion process of EDM. The change of temperature field and the formation of molten pool in the heating process of SiC particles and Al matrix are analysed. The number of SiC particles in molten pool is counted and analysed, and the number of SiC particles in molten pool was counted, the simulation results were verified by the single pulse EDM experiments. The results show that the depth-diameter ratio of the molten pool increases with the increase of the pulse width, and decreases with the increase of the peak current. The number of melted particles in molten pool is basically unchanged.
Simulation Study on Cutting Force and Cutting Temperature in Turning of Titanium Alloy
Authors: Yang Dapeng , Yu Liu , Fujian Ma , Zhihua Sha , Zhang Shengfang 
Published: November 2019

AbstractThe objective of this paper is to study the cutting force and cutting temperature in turning of titanium alloy. The simulation of cutting force and cutting temperature by finite element simulation software ABAQUS is conducted. The orthogonal experiment is designed. The influence of various factors on cutting force and cutting temperature is obtained. A prediction model of cutting temperature and cutting force is obtained by performing multiple linear regression analysis on the data obtained from orthogonal experiments.
A Study on the Design Approach and Theory for the Hydrostatic Propulsion Drive System of a Tamping Machine
Authors: Wang Wenlin , Cai Xiong 
Published: November 2019

Abstract
With the fast developing of modern high-speed railways, it is urgent and meaningful to introduce effective design approach and theory for advanced railcar development. A design approach and theory for the hydrostatic propulsion drive system of a tamping machine is proposed in this study, the design approach and theory includes the overall design method, specification of the hydraulic pump and motor, the optimally matching of the hydraulic pump and diesel engine and the force equilibrium verification. A design case study is finally conducted and a series of good performance validates the effectiveness of the proposed design approach and theory: the designed closed-type hydrostatic propulsion drive system is smaller and more integrated in configuration, and is with high efficiency; the designed system is stable and fast in dynamic response with acceptable overshoot and errors, the displacement performance of the tamping machine is satisfactory for its cyclic tamping operations, and the tamping machine has also got a wide scope for high-speed mobility with satisfactory acceleration performance. Thus, the proposed design approach and theory in this work will be instructive for further tamping machine product development and design optimizations.
Structural Topology Optimization of Cantilever Crane Boom Based on Equivalent Moving Load Method
Authors: Yin Jian , Zhang Shengfang , Liu Yu , Sha Zhihua , Ma Fujian , Yang Dapeng , Yuan Dongfang 
Published: November 2019

Abstract
As a key structure in the process of lifting heavy objects by cantilever cranes, the boom is of great significance. When the cantilever crane carries heavy objects, the load on the boom is a typical moving load. The traditional structural optimization method cannot fully consider the influence of the moving load on the structure. Based on the variable density structure topology optimization method, the equivalent moving load method is proposed to transform the motion of heavy objects on the boom into multiple equivalent working conditions. And according to the structural characteristics and motion form of the boom, the weight coefficient of every equivalent working conditions is assigned. The number of equivalent moving loads is determined in the form of multiple growth, and finally the lightweight cantilever crane boom structure is obtained, which is 32.08% lighter than the original structure, thus verifying the structural topology based on the equivalent moving load method proposed in this paper. The feasibility and effectiveness of the optimization method are also provided for other structural optimization that are subject to moving loads.
Research on Machining Fixture Layout Optimization for Near-Net-Shaped Jet Engine Blade
Authors: Zhang Kaiyao , Wu Dongbo , Wang Jiao 
Published: November 2019

Abstract
The design of machining fixture layout optimization for near-net-shaped jet engine blade is a major problem in the blade processing and manufacturing process. In this paper, the mathematical model of machining fixture layout optimization is established, and the influence of the clamping point position on the machining deformation of the blade-fixture system is analysed. Firstly, the mathematical model of machining fixture layout optimization is established according to the process requirements and clamping characteristics. Secondly, the positioning clamp points of machining fixture is optimized by the combination of finite element analysis (FEA) and genetic algorithm under the optimization target of the minimum value of the maximum deformation of the blade. Finally, cutting experiments are carried out to verify the reliability of the optimal layout fixtures, and the feasibility of the algorithm is verified by comparing with the minimum value obtained by the traditional Monte Carlo statistical method.
Calculation of the Energy Complex Based on a Steam Gas Installation Assessment of the Parameters of the Contour of the Auxiliary Steam Power Plant Installation
Authors: Gaev E.S. , Panshin R.A. , Shimanov A.A. , Tereshchenko O.V. , Shatochin E.V. , Uglanov D.A. 
Published: November 2019

Abstract
In this paper, we calculate the parameters of the energy complex on liquefied natural gas (LNG), which serves for the gasification of LNG with its further utilization in the circuit of a steam turbine plant, during operation of which additional electrical energy is generated. We evaluate the effectiveness of regasification of cryoproducts and evaluate the potential of using Cold Energy.
Various schemes of power plants using Cold Energy are considered. The parameters and characteristics of the combined-cycle plant consisting of the gas-turbine circuit and the steam-turbine circuit are calculated. The coefficient of cryoproduct energy return (liquefied natural gas) of the considered schemes is calculated and and based on the data obtained, the most optimal one is selected.
Calculation and Determination of Energy Parameters of the Mini-CHP on the Basis of the Heat Pump
Authors: Grinuk U.I. , Panshin R.A. , Shimanov A.A. , Tereshchenko O.V. , Uglanov D.A. 
Published: November 2019

Abstract
In this paper, the calculation and determination of the parameters of a mini-CHP on the basis of a heat pump is carried out, using four different plant diagrams as the power supply for the heat pump. Thermodynamic calculation of the heat pump. Calculation of the efficiency of the heat pump. Analysis of structural schemes for generating electricity using micro-thermal power plants and based on heat pumps A comparative analysis of the effectiveness of various schemes with mini-CHP. An assessment of the capital costs of installation, operation and determination of the payback period of the mini-CHP on the basis of a heat pump with various plant diagrams is carried out and the most economically advantageous scheme is selected. The practical application of the studied structural schemes is evaluated.
Research on Performance of Terrain Matching Algorithm for Underwater Autonomous Vehicle Based on Particle Filter
Authors: Jian Shen , Lu Xiong , Ning Ba 
Published: November 2019

Abstract
AUV is a powerful tool for exploration and development of marine resources. Underwater terrain matching navigation is an emerging passive autonomous navigation method, which improves the long-term and high-precision navigation capability of AUV. The underwater terrain matching algorithm based on particle filter (PF) use a large number of particle sampling to approximate the system state, which can avoid the Taylor expansion truncation error caused by the terrain linearization method, and has good matching precision and terrain adaptability. However, due to the strong nonlinearity and the uneven distribution of the underwater terrain features, it is difficult to achieve the full-range terrain matching optimize with a single configuration parameter of PF underwater terrain matching algorithm. For this reason, this paper has comprehensively studied the PF terrain matching algorithm (referred to as PF matching algorithm). The principle, accuracy and implementation steps of PF algorithm are analyzed. With the UKF algorithm as a reference, the advantages and disadvantages of PF-based algorithm are studied through computer simulation of terrain matching navigation. The matching precision and terrain adaptability of PF-based algorithm has been tested. From the simulation results, it is concluded that the particle diversity decline is one of the main factors affecting the matching performance, which provides a basis for algorithm performance improvement and engineering adaptability improvement.