bluuebunny/crossref_metadata_2025_split huggingface dataset:
Science and technology for the Alert Group Disaster “Tumik Singgalang” East Malalak Nagari, Malalak District, Agam Regency, West Sumatra
Authors: Ansosry  , Barlian Eri , Syah Nurhasan , Razak Abdul 
Published: August 2019

Abstract
In the implementation of devotion in Jorong Saskand obtained a commitment on the part of districts, villages and ellipse as a service area. The commitment is obtained based on some identification problems faced by people who are important to be solved collectively. Society needs an explanation in terms of the academic science related to the potential danger to human settlements that are prone to landslides. The survey was conducted using a test to determine the type of layer geoelectric lithology / rock. Based on the results of the interpretation of electrical resistivity tomography. Wenner configuration showed layers of clay and pumice tuff at this track. Scientific analysis is translated in simple language to convey to the public. The solution to the problems facing society is the improvement of information systems at the community level while considering the potential and local wisdom. Public understanding of scientific terms that are directly involved in the technical processes related to geological conditions in disaster areas and this becomes the basis for an early warning system to collect and effective mitigation mechanisms to do. Improvement of early warning information system for landslides that involve elements that exist in society. To strengthen the information system related to early warning, then the required agreement among participants so that generated Mechanism of Landslide Mitigation Participative Approach. This method is outlined in the form of Standard Operating Procedures (SOP) early warning system for landslides Jorong Saskand, East Malalak, Agam Regency.
Implementation strategy character building of care and environmental culture in school
Authors: Teguh Prihartono Agus , Azhar Aulia , Danhas Yunhendri , Rusdinal  , Syah Nurhasan 
Published: August 2019

Abstract
Adiwiyata program has been launched in schools. The character building in schools, especially the caring and cultured environment is deemed necessary to be studied, because considering the broad and long-term impact on environmental conditions between generations. To this day, related to the environmental attitudes and culture. The point is to form caring and cultured characters for school citizens through the education system implemented in the education level unit. Therefore, it needs to be measured to what extent the implementation is running and how the improvement strategy is going forward. The number of schools that become the Adiwiyata School, in Padang Town are reaching 243, out of 646 totality of schools. To increase the number of adiwiyata schools in the Padang Town to the future, an improvement strategy is needed based on current conditions. The current condition in question is all the strengths, weaknesses and opportunities and threats that exist. This research is classified as qualitative research. The aim is to increase participation of school into Adiwiyata Program in Padang Town. The method used tin this research is SWOT analysis (strengths weaks threats opportunities). The results of the research, the strategy direction is obtained in the form of growth with the main strategy in the form of SO Strategy (Strenghts - Opportunities), namely “utilizing the power to seize the opportunities that exist”, or “increasing the opportunities for existing strengths”. The derivatives of this main strategy are 10 (ten) priority strategies.
Progress in polystyrene microspheres
Authors: Piaopiao Wang , Zihui Meng 
Published: August 2019

Abstract
The preparation methods of polystyrene (PS) microspheres were reviewed, and the effects of monomer, dispersant, initiator, reaction medium and temperature on the particle size and size distribution of PS microspheres were discussed. Finally, the application prospect of polystyrene microspheres was prospected.
Research Progress of High Temperature Filter Materials in Bag-hose Precipitation
Authors: Xiangai Zhang , Yuwen LIU , Wei JI 
Published: August 2019

Abstract
Bag-hose precipitation for its efficient, reliable, low energy consumption and simple maintenance has been widely recognized in various industries. The application of bag-hose precipitation in more than twenty fields presents rapid development trend, such as electric power, cement, steel, non-ferrous metals, machinery, chemical industry and municipal. The research status of bag-hose precipitation technology is reviewed. The application situation and developing trend in the electric power, cement, waste incineration and steel are summarized. The developing direction of high temperature filter materials in bag-hose precipitation is anticipated.
Electronic distribution and elastic properties of zinc-blende AlN and GaN
Authors: Wang Huanyou , Jin Gui , Tan Qiaolai 
Published: August 2019

Abstract
The density-functional theory (DFT) and density-functional perturbation theory (DFPT) are employed to study the electronic distributions and elastic properties of zinc-blende AlN and GaN. The linear charge density distributions along the [111] direction and charge density distribution of (001) planes for zinc-blende AlN and GaN are calculated. The total state of density and partial state of density of AlN and GaN are also calculated. Based on the optimized lattice parameters, the elastic constants and the internal strain parameters of zinc-blende AlN and GaN are calculated. The elastic tensors and compliance tensors are used to calculate Young’s modulus of (101) planes.
Intelligent optimization design of specimen on sheet materials for Split Hopkinson Tensile Bar tests
Authors: Wang Qinghua , Xu Feng , Xing Liangliang , Huang Dedong , Wu Bin 
Published: August 2019

Abstract
The Split Hopkinson Tensile Bar (SHTB) is one of the most widely used methods to study the high strain rate behavior of materials. For these experiments usually dogbone-shaped sheet specimens are used. However, there’s no agreement on the exact dimensions. In the present study, mechanism of the influence of specimen responses on accuracy of SHTB experiments was investigated with finite element program ABAQUS (Explicit). Indicators which can evaluate the measurement accuracy of specimens are proposed based on this. Orthogonal test is designed to establish the sample database for back-propagation (BP) neural network, which is adopted to fit the non-linear mapping from structure parameters to accuracy indicators of specimen. Optimal design of structure for sheet specimen is obtained with Genetic Algorithm (GA) according to the fitness of individual determined by trained and qualified BP neural network. At last, numerical simulations are adopted to verify the validity of the optimal structure for sheet specimen. The result of this study can provide recommendations for specimen design and data reliability analysis in Split Hopkinson Tensile experiments.
Study on Electrochemical and electrical discharge compound Micro-machining for Silicon
Authors: Chen Hui , Shi Lei 
Published: August 2019

Abstract
Silicon material is a widely used substrate in micro-electromechanical systems, and its micro-fabrication technology has always been a research hotspot. The main microfabrication methods of silicon material are chemical etching, electrochemical machining (ECM) and electrical discharge machining (EDM). The electrochemical and electrical discharge compound machining technology is a kind of machining method for non-conductive materials. In this paper, the compound machining technology was studied and applied to the microfabrication of silicon material. The machining principle of silicon material in hydrochloric acid solution was studied, and the influence of silicon material type and voltage on the machining was analyzed. It is found that n-type silicon can be machined, while p-type silicon can hardly be machined. With this technology, micro three-dimensional structures can be fabricated on silicon material.
Techniques used to improve the tribological performance of the piston ring-cylinder liner contact
Authors: Elagouz Ahmed , Ahmed Ali Mohamed Kamal , Xianjun Hou , Abdelkareem Mohamed A. A. 
Published: August 2019

Abstract
The mechanical assemblies in automotive engines are usually lubricated by a combination of oil and solid lubrication films. Consequently, the significant current challenges for developing the tribological behavior of vehicle engines need the lubricants that conform to different operating conditions by providing mechanisms for reducing friction and wear. This article summarily reviews the techniques used to improve the tribological performance for piston ring-cylinder liner contact and evaluates their effectiveness to provide the most assuring approaches to reduce friction and wear. The objective was to explore the areas where there are openings for further research contributions to achieving an improvement in the piston ring-cylinder contact in automotive engines.
Effect of Dispersion of Nano-inorganic Particles on the Properties of Polymer Nanocomposites
Authors: Liu Ting , Zhong Jihui 
Published: August 2019

Abstract
Nanocomposites refer to materials with at least one one-dimensional dimension within 100nm of the dispersed phase of the composite. Nanomaterials have a large phase interface area, which have many new physical and chemical properties that macroscopic objects do not have. The research on dispersing nano-particles in polymer to improve the properties of polymer materials was introduced in this paper, and the influencing factors of dispersing effect of nano-particles in polymer were studied from the aspects of surface treatment agent and mechanical processing technology and so on.
Study on 3D printing process of continuous carbon fiber reinforced shape memory polymer composites
Authors: Shen Xinxin , Jia Baoxian , Zhao Hanxing , Yang Xing , Liu Zhengxian 
Published: August 2019

Abstract
In this paper, shape memory polymer (SMP) and continuous carbon fibers (CCF) were utilized as raw materials to manufacture composites by means of 3D printing based on FDM. Various process parameters were systematically studied by the orthogonal experiment to find out the optimal process combination where interfaces and mechanical properties of printed composites specimens were treated as research objectives. The influence of each factor on the performance of the specimen was discussed. The results indicated that the mechanical properties were preferable when the printing temperature was 200°C, the printing speed was 4.5mm/s, the scanning pitch was 1.1 mm, and the ply stacking sequence was 0°. Furthermore, the fiber content had little effect on the shape memory performance of the polymer matrix. The rapid manufacture of shape memory carbon fiber composites has potential use in the field of aerospace.
Study on Charging Performance of Solar Panels Auxiliary Batteries for Hainan Electric Bus
Authors: Bai Youjun , Zheng Yan , Liu Shihao 
Published: August 2019

Abstract
Under the background of building free trade pilot area in Hainan Province to promote clean energy vehicles in an all-round way, this paper explores adding solar panel auxiliary batteries to electric buses with subtropical climate characteristics. Based on the solar energy resources of Haikou City, the experimental vehicles and parameters are selected, and the average daily power generation of solar panels is studied. The endurance mileage can be increased under full load air conditioning conditions. The results show that the installation of solar panels for battery auxiliary charging in electric buses has certain energy-saving and environmental benefits, but combined with the current operation of Hainan electric buses, the promotion and use of electric buses has no prospects for development.
Effect of Laser Processing Parameters on Surface Texture of Ti6Al4V Alloy
Authors: Xi Xiaoying , Pan Yongzhi , Wang Pengcheng , Fu Xiuli 
Published: August 2019

Abstract
Surface micro-machining was performed on Ti6Al4V alloy sample by nanosecond laser. The micro-morphology, the depth of texture and the chemical composition of melt deposits were analyzed through different techniques including Ultra-Depth Microscopy, SEM and EDS. The single factor method was applied to investigate the influence of different laser parameters on the depth of texture and micro-morphology. The result showed that the depth of texture increased first and decreased with the increase of average power (11-20.9W), the texture depth decreases sharply when the scanning speed increased from 10mm/s to 40mm/s, and the repetition frequency had little effect on the depth of texture. It was possible to select an optimum combination of laser processing parameters that obtain different depths of texture without decreasing the surface quality of texture.
Effect of controlled rolling and cooling process on microstructure and properties of X65 pipeline steel
Authors: Zhang Hai , Li Shaopo , Hao Ning , Li Zhangjun 
Published: August 2019

Abstract
Effect of rolling and cooling process on microstructure and properties of X65 pipeline steel was studied by means of tensile test at room temperature, oscilloscopic impact test and metallographic microscope. And the impact fracture process of samples with different microstructures was analyzed by oscillographic impact curve. The results indicate that controlled cooling process has important influence on the microstructure of the sample. The strength and toughness of sample with acicular ferrite microstructure are better than this with ferrite and pearlite microstructure. The crack initiation energy of the acicular ferrite microstructure is similar to that of ferrite and pearlite microstructure. However the crack propagation energy of the acicular ferrite microstructure is different from that of ferrite and pearlite microstructure.
1.99 micron Tm:YAP acousto-optical Q-switch laser
Authors: Wen Ya , Zhang Hongliang , Zhang Lin , Li Shuo , Wu Chunting , Jin Guangyong 
Published: August 2019

Abstract
Report the acousto-optical Q-switched operation of double ended pump big energy Tm:YAP laser.Tm:YAP crystal was a-cut, the dimensionas were 3mm×3mm×15mm and doped was 3at%. The laser diode center wavelength of 795nm. When the pump power was 79.2W, the repeat frequency was 1 kHz, a 1.99 μm wavelength laser output of up to 16.36 mJ was obtained, the narrowest pulse width of 38.04 ns, the peak power of 430.07 kW. The slope efficiency was 29.42%, light and light conversion efficiency was 20.66%. When the Q-switched average power was 15W, the beam quality factor of M2 was estimated of 3.19 in x-direction and 3.29 in y-direction
Research on the Comparisons between Sabah Cycle and Diesel Cycle of Common Rail Injection Diesel Engine
Authors: Liu Feng 
Published: August 2019

Abstract
Pressure constant pre-expansion ratio has directly influenced on the highest temperature of Diesel cycle. The common rail injection system also has directly influenced on the highest temperature and pre-expansion ratio, thereby it also affects the technical indices, such as thermal efficiency and average valid pressure. Taking National VI emission standard diesel from Weicai Company as an instance, the highest temperature and other technical indices of Sabah cycle with a common rail injection system and Diesel cycle without a common rail injection system were compared.
Motion Simulator System for Rendezvous and Docking Based on RTX
Authors: Liu Hao , Gong Dezhu , Fu Tongling , He Huadong , Li Bo 
Published: August 2019

Abstract
Motion simulator system for rendezvous and docking needs high precision and high real-time capacity. The main structure, crucial indexes and control system structure are introduced at first. Software demand is also analyzed, software is modular designed, makes use of fine interface of Windows, use real-time processing ability of RTX and high precision of control algorithm. The experimental results show that the motion simulator system for rendezvous and docking based on RTX have the high precision and dynamic real-time capacity, which can satisfies the demand of application.
Establishment and verification of longitudinal aerodynamic model of tandem wing aircraft
Authors: Wang Ziyi , Xiong Jing , Cheng Xiaoxue , Li Jie 
Published: August 2019

Abstract
This paper clarified the contribution of front wing and rear wing to the longitudinal aerodynamic derivative by analyzing the characteristics of tandem wing aircraft. By combining the structure and aerodynamic simulation data of the aircraft, the aerodynamic derivative can be directly solved through simplification of force without introducing the tail capacity Vh, and the longitudinal short-period (control) transfer function of the tandem wing aircraft can be obtained by substituting the aerodynamic model which is composed by aerodynamic derivative into the short period motion equation. This transfer function can be used to build the control system in Simulink. When the input signal is the same, the short-period response of the system has high goodness of fit with the value measured in flight test. Therefore, the longitudinal aerodynamic model of the aircraft is well verified, and it can be used for the design of the aircraft controller and its aerodynamic shape. The modeling method and the verification method are applicable to fixed-wing aircraft including tandem wing aircraft.
Dynamic characteristics of high-speed railway vehicle with axle box bearing faults
Authors: Xinna Ma , Jingwei Liu , Wenrui Shi 
Published: August 2019

Abstract
Based on the motion characteristics of axle box bearings and taking high-speed railway vehicles as the research object, a vertical dynamic model of 17-DOF car body-bogie-axle box bearings-wheel set is proposed. Aiming at the surface fault of axle box bearing, the New-Mark fast numerical integration method is used to simulate and analyze. The dynamic characteristics of railway vehicle under early failure of axle box bearing on inner ring and outer ring raceway surface are studied. The vibration characteristics of axle box bearings under different fault degrees and different vehicle speeds (axle box bearing speed) are analyzed. The changes of vehicle dynamic performance and vibration characteristics under fault evolution are discussed. The analysis results show that the vibration of car body and bogie is little affected by the early fault of axle box bearing; with the deepening of the fault degree, the vertical vibration acceleration and displacement of axle box bearing are increasing; with the increase of vehicle speed, the motion state of axle box bearing undergoes a change from periodic motion, quasi-periodic motion to chaotic motion. Finally, the dynamic simulation results of axle box bearing fault evolution in high-speed vehicle system are validated on the experimental platform. The research work has certain reference value for vehicle condition tracking and monitoring.
Improved Droop Control Strategy with Fast Equalization for SOC Based on Power Balance in Energy Storage System
Authors: Zhang Heng , Sun Shiyu , Feng Gaohui , Shi Bingqing 
Published: August 2019

Abstract
In parallel operation of energy storage units, the droop control based on voltage and current tends to neglect the difference of SOC in energy storage unit, which leads to the withdrawal of some energy storage units from the system due to overcharge or overdischarge, thus causing the voltage fluctuation of DC micro-grid bus. To solve this problem, an improved droop control strategy with fast equalization for SOC is proposed. With the SOC of energy storage batteries, the acceleration factor can be calculated in real time, so as to improve the speed of SOC equalization and power distribution. Finally, the validity of the control strategy is verified by simulation results with MATLAB/Simulink.
Research on Process Parameters Optimization of Fine Blanking for Intermediate Washer of Clutch Based on Orthogonal Test
Authors: Mu Rui , Wang Xiaoli , Wang Caihong 
Published: August 2019

Abstract
Intermediate washer of automobile clutch is taken as research object, blanking clearance, radius of corner of punch, blanking speed, blank holder force, counter force and tooth angle of blank holder are selected as influencing factors, length of shear zone is chosen as evaluation index. Orthogonal test with six factors and three levels is established, and Deform-2D is used to simulate fine blanking process of intermediate washer at different combinations of process parameters. Blanking clearance has a significant influence on length of shear zone by variance analysis. The influence sequence of fine blanking process parameters on length of shear zone is blanking clearance, counter force, radius of corner of punch, blank holder force, blanking speed and tooth angle of blank holder. In addition, the optimal combination of process parameters of fine blanking for intermediate washer are as follows: blanking clearance is 8%t, radius of corner of punch is R0.09 mm, blanking speed is 15 mm•s−1, tooth angle of blank holder is 45°, blank holder force is 450 kN and counter force is 150 kN. The simulation value and experimental value of length of shear zone for optimized scheme are 3.945 mm and 3.438 mm respectively, the relative error between simulation value and experimental value is 12.9%. Therefore, it provides an important reference for the actual production of enterprise.
Analysis of Shear Lag Effect in Twin-cell Box Girders
Authors: Luo Min , Lin Peng-zhen , Sun Li-xiang 
Published: August 2019

Abstract
For the twin-cell box girder, considering the difference of the shear lag between each cantilever plate, the shear lag warping displacement function of each wing of the box girder is defined. Based on the basis of the variation principle, the governing differential equations for considering the shear lag effect of twin-cell box girder are established. For a typical simply supported beam of twin-cell box girder, according to the three dimensional numerical methods used for plate and shell and the analytical solution method in this paper, the shear lag distribution law of uniform load and concentrated force has been studied. The results show that the shear lag warping displacement model proposed in this paper can reflect the difference of shear lag between each cantilever plate. The analytical solution is in good agreement with the finite element numerical solution. The shear lag effect at the top and bottom of the web site of the twin-cell box girder is different from that of the edge web site. In this paper, the stress at the top and bottom of the middle web is smaller than that at the side web.
High spatial efficiency single-particle trapping array based on a microfluidic device
Authors: Duan Yu , Zhang Weiguan , Peng Zhengchun 
Published: August 2019

Abstract
High-throughput single cell trapping is critical for cell biology research. In this paper, a microfluidic device with micro-cup array is designed to achieve high-throughput single-particle trapping. Microspheres were aspired in the micro-cup array and immobilized in site by hydrodynamic force generated by the flow. Design of micro-cup is optimized based on “least flow resistance path” principle showing that higher volume flow ratio leads to better capturing efficiency. The result showed 100% capturing efficiency with flow ratio of 1.744. Also, by placing the micro-cup structure side-by-side in the channel, high-throughput of the microfluidic device is realized. 35 microspheres can be captured in the trapping area of 160×510 μm2 which is a promising tool for high-throughput single cell analysis.