bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on Microstructure of Nano-Zirconia Coating by Atmospheric Plasma Spraying
Authors: Chang Ying , Zhu Qin Biao , Dong Shi Jie , Wang Hui Hu , Du Kuan He
Published: August 2014

On the basis of successfully preparing nanozirconia coating via reasonable spraying technical parameters, the cross section and surface morphology of coating were determined by scan electron microscopy (SEM), and the ceramic particle sizes of coating were determined by transmission electron microscopy (TEM). Experimental results indicate that plasma sprayed zirconia coating possesses typical layer structure of thermal spray coating, in which columnar grains pile up together. Meanwhile, the non-molten nanopowders coexist with the layer structure. In addition, the equiaxial grains exist in the zirconia coating according to TEM, but the grain size is not uniform.
Porous Silicon as Functionalized Material for Biomedical Application
Authors: Zhang Xi Feng , Dong Hong Xia , Chou Yuan Yuan
Published: August 2014

As a novel functional nanomaterial, porous silicon has many unique properties, such as its unique optical characteristics, biocompatibility, abundance, mechanical, electronic properties, silicon microelectronic compatibility, filtration, nanometer micropore controllable growth and large specific surface area, which enhance its prospect in the biological analysis, immune virus detection, environmental, food industry and so on, and has attracted world interests in the fields of materials science, biology, medicine, and electronics. In this work the application of porous silicon in the fields of biological and biomedical has been introduced with depth and width of researching on its.
Precision Analysis of the Surface Reconstruction Model Based on Geomagic Qualify
Authors: Wang Wei , Gao Dong Qiang , Yi Jiang Miao
Published: August 2014

Use Geomagic Qualify software, take the distance between the measure point and the surface model as the main evaluation index, respectively evaluate the quality of the shoe last surface reconstructed by tradition surface modeling way and quickly surface modeling approach, through 3D comparison, 2D comparison and special point comparison, get the 3D deviation chart and the error percentage distribution list, through the analysis and comparison of the charts, the two ways of surface reconstruction method are in line with the requirements of the surface, select the appropriate method of surface reconstruction according to the different requirements of surface reconstruction quality, provide the reference basis to surface measurement and surface reconstruction of other models.
Adaptive Stochastic Resonance Method for Early Fault Detection of Rotating Machinery Based on Alpha Stable Distribution
Authors: Yu Gang , Chen Ye
Published: August 2014

This paper proposes an adaptive stochastic resonance (SR) method based on alpha stable distribution for early fault detection of rotating machinery. By analyzing the SR characteristic of the impact signal based on sliding windows, SR can improve the signal to noise ratio and is suitable for early fault detection of rotating machinery. Alpha stable distribution is an effective tool for characterizing impact signals, therefore parameter alpha can be used as the evaluating parameter of SR. Through simulation study, the effectiveness of the proposed method has been verified.
Study on the Fusion of the Train 5T System
Authors: Yan Jian , Yue Jianhai , Yang He
Published: August 2014

Vehicle operation safety monitoring system (5T system) is the important means to guarantee the safe operation of the vehicle under the new situation of mixed passenger and freight rail transportation, speed, vehicles overloaded. The system using a variety of advanced motion detection technology, information processing technology and network technology to achieve real-time vehicle dynamic monitoring of running status. However, various types of failure of vehicle components are interacting and interrelated, in practical applications, there is a strong demand for information sharing, centralized monitoring and comprehensive analysis. Based on the actual research of Datong-Qinhuangdao line, a set of building methods of 5T information fusion are proposed, laid the foundation for the promotion of 5T information fusion.
Glass Capillary Tension Feed System Structure Design
Authors: Chen Shan , Yao Zhi Yuan
Published: August 2014

The nanofluidic devices with the nanopores are the foundation of the third generation of the DNA sequencing technology. Comparing with the traditional nanopores constructed on the nanofilms, the nanofluidic devices made by the SiO2 have higher stiffness, strength and stability. We study on the structure design of glass capillary tension feed system, used in manufacture of the nanofluidic devices with the nanopores. Firstly, we design glass capillary tension feed system, including the mechanical moving parts, heating parts and the control parts, which is used to heat glass capillary and stretch it to get glass capillary with a smaller inner diameter in need. Among them, the control accuracy of the moving parts is up to 1μm, the heating range of heating parts is less than 5mm, and the temperature can reach 1500 ̊C. Then we make a prototype, and do some experiments with it. According to the experiment results, the system can be used for glass capillary tension, and the inner diameter of the nanoglass capillary stretched by this system is as small as 500 nm.
Research on Height Measure Based on Shadow Feature
Authors: Xue Li , Sun Wen Bang , Tang Hai Yan , Wang Jie Min
Published: August 2014

At present, the height measure is an important content of image processing. But the height is determined by solar height angle achieved by look-up table, and the method is imprecise and inconvenient. To overcome such drawbacks, a novel determination method was proposed in the paper. First, the imaging time is adjusted to Solar Time. Then, the solar height angle at imaging time is calculated. Finally, the height of an object is calculated based on solar height angle and shadow length. The theoretical analysis and experiment results show that the proposed method is more effectual.
Study on Variation of Reservoir Parameters in Different Injection Stage
Authors: Zhang Yan , Yu Shuang
Published: August 2014

In the old oilfields, Reservoir properties have a certain change in the long-term effects of the injected water, studying variation of reservoir parameter in different injection stage has important Significance, it can help to determine the distribution of remaining oil in different washing stage and make reasonable recovery methods. In this paper, combined with experimental data from a large number of samples in different washing stage and numerical analysis method, the variation of parameters of different reservoirs in different washing stage is analyzed, the conclusion includes: With the water washing degree increasing, flow capacity of class I reservoir increased gradually; There is rapid growth under a certain degree of water injection condition, the aim reservoir is divided into four classes. In the class III and IV reservoirs, average pore throat radius is less influence by washing. Water washing degree has the least impact on class I reservoir and there has the greatest impact on class IV reservoir. The influence of washing level is the greatest on the class I reservoir and the poorest on the class IV reservoir.
A Sensor Array Optimization Method Based on Variance Difference for Machine Olfaction
Authors: Chen Rong Rong , Luo De Han , Sun Yu , Sun Yun Long , Gholam Hossini H.
Published: August 2014

In machine olfaction or electronic nose, sensor optimization is important to enhance pattern recognition efficiency and reduce redundant information. Highly correlated response of one sensor to two different odors implies less contribution of this sensor to the classification of these two odors. Variance difference is a significant index to measure the similarity of sensor responses. A sensor optimization method based on variance difference is proposed in this paper; both the average value of variance difference and cluster analysis of variance difference matrix were considered to identify several possible sensor subsets. Six Chinese herbal medicines and linear discrimination analysis (LDA) were applied to test the classification results in order to determine the best subset. LDA results indicated that the optimized sensor subset performed well in classification of the six Chinese medicines. The proposed sensor array optimization method could be applied to other kinds of odors classification as a novel method.
Research on Imaging Simulation of Aerial Photography
Authors: Liu Zhao Hui , Sun Wen Bang , Wang Jie Min , Bai Xin Wei
Published: August 2014

Nowadays, most imaging simulation focus primarily on image quality, but the light path of an image sensor should be simulated in many application areas. So, light path simulation of aerial photography has been researched in the paper. The main idea is that the pixels of a known vertical image with known altitude will be transferred to the simulation photosurface along the light path. First, several coordinate systems are set up to describe the space coordinates of a pixel. Then, the relationship between the vertical image and the simulation photosurface are built based on the collinearity equation. Finally, the simulation image will be generated from the known vertical image by the method of indirect re-sampling. The theoretical analysis and experiment results show that the proposed method can simulate the light path very well.
Study on the Treatment Effect on the Loess Layer of Culvert Basement on Central-South Railway DK241+860 Section
Authors: Feng Ai , Zhao Yan , Zhan Qi Fang , Jia Ya Hui , Zhu Ai Jun
Published: August 2014

As an example of collapsible loess foundation treatment project in central and southern shanxi tunnels five railway culvert, the collapsible loess and harm of engineering properties, this paper introduces the construction method by cement-soil compaction pile to reinforce the foundation in order to ensure the quality and effect of the overloaded railway foundation.
On a Way to the Self-Optimizing LTE Networks
Authors: Asmaryan Albert , Borovik Irina
Published: August 2014

Main achievements in load balancing algorithm in a long-term-evolution (LTE) mobile communication system are presented. As result a self-optimizing system, that could be implement in the real networks. Basic target functions, such as the signal-to-noise ratio distribution, bit error rate, energy efficiency are derived as a figure of merit. The framework is exemplified by basic investigations on load balancing technology.
Design of a Capacitor Cross-Coupled Common Gate Wideband Low Noise Amplifier with Noise Canceling Technique
Authors: Song Dan , Fan Xiang Ning , Bao Kuan , Hua Zai Jun
Published: August 2014

This paper presents a wideband low noise amplifier (LNA) for multi-standard radio application .The low noise amplifier achieves wideband matching with the structure of differential common gate .Meanwhile ,the low noise characteristic is achieved by noise canceling and capacitor cross-coupled. Fabricated in 0.18μm CMOS process, the LNA is designed to operate from 700MHz to 2.6GHz.As are shown in the results of simulation, when the LNA operates from 700MHz to 2.6GHz,the S11 is less than-10dB,the gain achieves 8.5 dB and the variation is within ±0.5dB.The noise figure is 2.2dB wih the supply voltage is 1.8v and the drain current is 8mA.
Construction and Influence Analysis of Co-Author Network Based on Network Science
Authors: Yang You She , Zheng Ming Fa , He Qi Fang , Wang Tie Zhu
Published: August 2014

In this paper, we are devoted to the construction and analysis of research network. Firstly, on the basis of data Erdos1, a co-author network is built and two novel measures are proposed to analyze properties of the co-author network. A data extraction method using string matching technique is developed and the network is visualized using UCINET. Then, the first-order and second-order entropy are defined to depict the complexity of the network, and the node’s invalidity probability and load-bearing capacity are defined to depict the robustness of the network.
Compressive Properties Study and Finite Element Analysis on Duck Eggshell
Authors: Zhang Rong , Wang Shu Cai , Zhang Kai , Xie Xiong Feng
Published: August 2014

The mechanical properties of the sharp end, equator and blunt end of White-duck-eggshell were tested through the compression experiment, and the static load mechanical properties of the eggshell were simulated with finite element analysis method. The results showed that the maximum pressure that the loaded long axis of the eggshell can endure is obviously greater than that of the short axis, and that the maximum pressure that the sharp end can endure is greater than that of the blunt end in the long axis. Furthermore, the same results have been obtained both by finite element analysis (FEA) and experimental study, which can prove the feasibility of the FEA in the analysis of eggshell mechanics properties.
Applying Information Theory’s Methods to Physics’ Content for Students in Nanoelectronics
Authors: Gnitetskaya Tatyana N. , Ivanova Elena B. , Nefedev K.V.
Published: August 2014

The paper deals with the necessity to develop and apply quantitative methods to the process of sorting and systematization of physics’ content, when future engineers are training physics. Consistency of the information theory’s methods and processes of the human’s information perception is emphasized. The sense structure of a physical term and graph of such structure, which are based on the information model of intra-subject connections, are given. It is shown that, using the sense structure graph of a physical term, the information characteristics of such term may be calculated. Nanoelectronics developes very fast, and students need to study many different disciplines. On the base of these characteristics we can fixed the information limitations to escape students overloading.
Solid-State Nanopores for Nanoparticle Sensing
Authors: Wang Lei , Zhao Wen Yuan , Mo Dan , Liu Quan Jun
Published: August 2014

In recent years, single particle detection techniques based on driving nanoparticles through nanoscopic pores with a voltage or pressure had been the subject of numerous studies. Since particles with high charge, such as DNA and proteins, have been widely used for research, there was little information about the translocation behavior of nanosized particles which with low charge. However, nanoparticles include virus and colloids are important samples for nanopore sensing technology. In this study, we employed the solid-state nanopore to sense nanoparticles as fundamental study. Nanopore with diameter of 185 nm has been used to detect the nanoparticles with compared low zeta potential of-16 mv in different voltages. And simulations of electric field strength was made by using COMSOL Multiphysics to assist analyze the translocation behavior. The result suggests that the nanoparticles could transport the nanopore under the large electric field. By rising up the bias voltage could favor the detection of the nanoparticles.
Influence of Pipe Diameters on Shapes of Air Taylor Bubbles in Small Pipes Containing Stagnant Water
Authors: Lertnuwat Boonchai , Angariya Niravit , Chaokijka Wit , Nuchjaroen Pratip
Published: August 2014

The aim of the work is to computationally investigate the influence of pipe diameters on shapes of air Taylor bubbles in small pipes, containing stagnant water. The examined pipe diameters are selected between 6.5 and 11 mm so that flows around the bubbles are laminar. The proper Taylor bubble shape of each pipe size is determined by varying the bubble shape until the air pressure distribution inside the bubble is uniform. Computational results show that the Taylor bubble shape will be slenderer if the pipe diameter is larger.
Effect of Grain Size on Effective Permittivity of Ferroelectric Films Based on Effective Medium Theory
Authors: Thongsri Jatuporn
Published: August 2014

Based on effective medium theory, the temperature dependence of effective dielectric permittivity, εe(T), on core radius (a) and thickness (t) of non-ferroelectric dead layer (DL) on the surface of inhomogeneous grains of ferroelectric film made up of cylindrical ferroelectric grains was theoretically investigated. It was found that εe(T) increases with increasing core radius but decreases with increasing DL thickness. In this work, an equation expressing the relationship among εe, a and t was derived. This equation is very useful for the preparation of a ferroelectric film to desired properties.
Process Control Virtual Laboratory: Temperature Control Based on LabVIEW for Convection Heat Transfer
Authors: Wutthithanyawat Chananchai , Srisiriwat Nawadee
Published: August 2014

The process control virtual laboratory is created by using LabVIEW for demonstrating process control via manipulating a simulated model of a physical process. In this study, a system of convection heat transfer in a rectangular duct is set up and connected with a data acquisition card and a computer serving for an advanced virtual laboratory aimed at supporting teaching and learning in Instrumentation and Control Engineering courses at Pathumwan Institute of Technology. The use of the virtual laboratory facilitates the ongoing evolution of the teaching method from a traditional didactic lecture and laboratory course to a more student-centered approach. The LabVIEW application is used to conduct several tasks including user interface design, publishing and sharing measured data, instrument control and remote access to a system in the Process Control Laboratory. Using LabVIEW software, students can familiarize the basic skills necessary to use equipment and software because the control systems in many industrial processes can be implemented on a computer which runs on LabVIEW.
Driver Behavior Detection Based on Multi-GNSS Precise Point Positioning Technology
Authors: Noomwongs Nuksit , Thitipatanapong Raksit , Chantranuwathana Sunhapos , Klongnaivai Sanya
Published: August 2014

Driver behavior is the key to safe mobility. In general, vehicle maneuvers can be determined from acceleration of the vehicle. Physically, the acceleration and brake can be detected with longitudinal acceleration while turning and lane change can be detected with lateral acceleration. Nowadays, navigation system technologies have been much improved both on availability and accuracy with combination of multiple navigation satellite systems. Normally, it’s called Multi-GNSS (multiple global navigation satellite system). With decimeter precision and the update rate scale up to 10-Hz, the GNSS could be an alternative solution for driver behavior detection. In this paper, advance Multi-GNSS with precise point position (PPP) technique was presented with a simple maneuver detection algorithm. The advantage of PPP over conventional navigation is decimeter accuracy without direct connection to any reference base station. The experimental Multi-GNSS receiver was JAVAD Delta G3T that installed on a utility vehicle. This high performance multi-GNSS navigation system was investigated with the driving behavior detection algorithm. The precise point positioning (PPP) technique in combination with multiple satellite navigation system (GPS+GLONASS+GALOLEO+QZSS) were applied in this study. The PPP technique improved the output of detection algorithm in acceleration limit from 260% error in conventional navigation system (GPS) to 20% of incidents with PPP.
Complex Network Based Modeling and Analysis of Resource Nodes for MG
Authors: Yin Yong , Zhang Chao Yong , Chen De Jun
Published: August 2014

Manufacturing Grid (MG) is one of the most promising manufacturing modes in recent years, which has been proved to be a complex network characterized with scale-free. In this paper, the resource nodes of MG are treated as the nodes of a network and the linkage among each node is treat as the edges or arcs, based on which a three-element model of G = ( V, E, R) is proposed, and a scene of the optimal composition strategy among the 50 candidate nodes aiming at task A is modeled. Next the static parameter of the degree for a resource node and the synchronization performance of the complex network model for the resource nodes are studied. Results of the paper can promote the management of the manufacturing resource nodes and improve the efficiency of sharing MG resources, so as to facilitate the application and popularization of MG.
Design of a Simple Underactuated Mechanical Gripper
Authors: Surakijboworn Mahasak , Wannasuphoprasit Wittaya
Published: August 2014

The objective of this paper is to design and develop a simple geometry of an underactuated mechanical gripper which can provide most common hand grasps, fingertip grasp and enveloping grasp. The gripper consists of 2 2-DOF fingers underactuated by a pulley-tendon system, and a movable pulley for underactuation between fingers. Each finger has 2 links and 2 pulleys. A parallel linkage is used to translate distal phalanx toward an object such that fingertip grasp is improved. This work implements stability and force isotropy criteria to optimize the design. The prototype has 0.43 of pulley-radius ratio and 1.72 of link-length ratio. From primitive-shape grasping test, the gripper is able to achieve the stable configuration.
Research on Damage Technology of Variable-Structure Following Warhead
Authors: Li Gang , Yuan Bao Hui , Sun Xing Yun , Liu Han Hui
Published: August 2014

Aimed at the structure limitation of tandem following warhead, a variable-structure following warhead which can be transformed from series to parallel was proposed. The following process of the variable-structure was simulated by numerical simulation method, and the advantages in reaming and aftereffect was proved, which provided new ideas for the design of the following warhead.
Finite Element Analysis of Magnetization Reversal Effect Based on Ferromagnetic Specimens
Authors: Xi Xiao Wen , Ren Shang Kun , Yuan Li Hua
Published: August 2014

Using large finite element analysis (FEA) software ANSYS, the stress-magnetization effect on 20# steel specimens with different shape notches is simulated under the geomagnetic field and tensile load. With the stimulation, the magnetic flux leakage fields at certain positions of the surface specimen were measured. Through analysis the relationship between the magnetic flux leakage fields of certain points with tensile stress, the results showed that the magnetic field value at certain positions of specimen surface first decreases and then increases along with the increase of stress, which is called magnetization reversal phenomenon; Different gaps and different positions of the specimen show different magnetization reversal rules; By measuring the maximal variation of the magnetic field value △Hmax at certain positions of the surface specimen and by analyzing its change law, we can roughly estimate specimen stress size and distribution regularity of stress. Moreover, this article also discusses the effect of lifts-off of the probe on the law of stress magnetization.
Parametric Modeling and Analysis of Self-Loading Container Vehicle Based on ANSYS
Authors: Wang Wen Bin , Cheng Kai , Cheng Lei
Published: August 2014

For the technical requirements of a domestic enterprise to develop a new generation of self-loading container truck products, this paper creatively puts forward a set of suitable reduction standards for special structure. Based on ANSYS and Visual Studio 2008 platform, the parametric modeling and automatic analysis of side loader container structure are achieved independently. Several operating conditions, such as stacking, self-loading and unloading etc. can be analyzed rapidly and automatically. The research achievement can be not only used for the conceptual design stage of forward design process, but also applied in the modification of the original structure, thus effectively shortening the product design cycle, reducing design cost, providing useful guidance for independent research of domestic enterprise.
Thermo-Structural Coupling Numerical Analysis of Rectangular Vessel
Authors: Tian Chun Lai , Zhou Shan , Han Li Yong
Published: August 2014

A rectangular vessel has two contact surfaces with different materials, iron and copper. In order to investigate thermo-structural characteristics of the vessel, the structural model is developed. The structural analysis is coupled with the thermal condition. The numerical simulation model with hex eight-node thermally coupled brick elements is established and solved by finite element method. The results show that the maximum stress with 112.5 MPa is distributed on the contact surface between the different materials. Because of the different materials’ expansions, there is stress concentration on the contact surface. The maximum displacement is 0.27 mm, almost the same at different pressure loads. The maximum stress increased to about 300 MPa as the temperature increase. The structural response caused by thermal expansion is important for the vessel design.
The Applied Research of Ergonomics in Lying Plate of Repair
Authors: Li Fu Xing
Published: August 2014

The car repair workers would be injured in some part of body because of improper working postures. To reduce the injuries while repairing, changes must be made in the design of the car lying board. The improvement will be made according to the ergonomics theory, thus from the perspective of the comfortable working posture; analyzing from a qualitative nature to a quantitative nature, the design of the car lying board through man-machine analysis module of CATIA software on how to enhance the comfort of car repairing. That will make it possible for the car lying board to change its height and the angle of the pillow board according to the level of fatigue of man, so as to improve the comfort of car repairing. Also, it will provide an important reference to the design of related products.
Virtual Reality Technology Applied in Automobile Modeling Design
Authors: Pan Xiao Yang , Wei Xiao Jia
Published: August 2014

it is to make the designers for the virtual reality technology application in automobile modeling have a certain understanding, By comparing the traditional car model making process and the latest virtual technology . Compared with Industrial Modelling Design of Automobiles and Man-Machine Engineering, the VRT could save enormous manpower and the material resources. Futhermore, it has a revolutionary change in the aspects of modeling precision and modifiability. it provides technical direction for Automobile Modeling.
Distribution Substation Site Planning Method Summary and Discussion
Authors: Li Hong Kai , Lv Ming Jun , Liu Jian Guo
Published: August 2014

The substation location is an important part of network planning . In this Paper, the optimal siting and site optimization mathematical model of classification are introduced , and the methods used in substation siting analyze many algorithms for a more comprehensive overview ; Finally,we offer some suggestions for the method of substation power market environment devlopment research .
Coanda Effect on the Impact of Distribution Characteristics of Oil-Air Annular Flow
Authors: Sun Qi Guo , Chen Dong Xu , Wang Xiong Shi , Zhou Zheng Hui
Published: August 2014

The T-junction model is simulated in Fluent by changing the curvature of branch pipe, and then the distribution characteristics of the annular flow was studied in T-junction distributor. The mass flow and pressure of the annular flow in this T-junction are studied, and the impact of Coanda Effect on the annular flow distribution characteristic is analyzed in oil-air two phases flow. The results show that, Coanda Effect affects the distribution of oil-air annular flow unevenly. The mass flow rate of air phase and the air velocity of outlet increase with decreasing the curvature, while the mass flow rate of liquid decrease with decreasing the curvature of the branch pipe connection; T-shaped junction inlet pressure is high, but the pressure gradient is small, the pressure gradient in the small curvature manifold is larger than that in the large curvature manifold.
Generation of Technological Model for Multi-Stage Incremental Forming
Authors: Zhu Hu , Zhang Wei , Li Hua Yi
Published: August 2014

In order to the difficult forming sheet metal part with the vertical wall to be formed by the multi-stage incremental forming, the algorithm of the recognition and modify the difficult forming surface of the vertical wall is studied. The method for generation of the technological model for multi-stage incremental forming is also presented. The case studies show that the algorithm is feasibility.
Research on Cam Contour Error of Grinding Machining
Authors: Chen Xiu Mei , Han Qiu Shi , Peng Bao Ying
Published: August 2014

In order to obtain higher cam quality, the research on the cam contour error is studied. The cam is machined in the way of X-C biaxial linkage motions. The linear motor drives the grinding wheel mechanism to get the motion of X axis, and the motion of C axis is the rotating of cam driven by the torque motor. Because of the servo-system-lag of the two axes, the cam contour error is formed in the X-C biaxial linkage motions. Moreover, the following position error of X axis and C axis is not same as the cam contour error. The relationship between axis following position error and cam contour error is studied. The mathematical model of cam contour error is constructed, the relationship between the cam contour error and the following position error are obtained. At last, the conclusion which the cam contour error can be controlled is made, although the following position error exists at the same time. To design the contour error controller for higher quality cam is based on the above conclusion.
Study on Stability of the High Rock Slope under the Flood Discharge Atomization and Rainfall
Authors: Shen Zhen Zhong , Nie Bai Song , Xu Li Qun , Yang Lei , Wang Ning
Published: August 2014

The stability of high rock slopes under the flood discharge atomization and rainfall is an in-negligible problem especially for the hydropower station with high head during the flood discharge. According to the complicated geological conditions of a high rock slope with the flood discharge problem in China, the method of the saturated-unsaturated unsteady seepage if used, thus the finite element model for the high rock slope in the downstream of the power station is set up. Based on the model, the distribution regularities of the unsteady seepage field of the rock slope is studied under the different discharge atomization and rainfall intensity. Moreover, based on the theory of continuous-discontinuous deformation, the finite element model is set up to analyze the stability of the slope, thus the deformation law of slopes under the flood discharge atomization and rainfall is studied and the safety of the slope is evaluated, and what's more, the engineering measures for improve the stability of the stability of the slope is put forward.
Research on the Quadrature Demodulation-Based Quartz Crystal Microbalance Implementation Method
Authors: Zhou Jun Peng , Pang Ren Shan , Yang Gui Fu , Chen Hai Xia , Wang Lian Ming
Published: August 2014

In order to overcome the shortcomings of traditional quartz crystal microbalance (QCM) network measuring method, such as high requirements for hardware devices, low measurement speed and high challenge to curve fitting, a method based on the Quadrature Demodulation was proposed to design a rapid and accurate measuring system for QCM parameters, which mainly took the advantages of Quadrature Demodulation to remove the intermediate frequency component while reserve the low frequency component. Furthermore, the effectiveness of this method was proved by contrasting the Matlab simulation results with the actual measurement results based on the modified measuring system, which indicated that the frequency resolution could reach 0.1Hz with high testing speed of 0.02s per cycle, the relative deviations of resonance frequencies were less than 0.01% and the deviation of the differences between series and parallel resonant frequency points was 0.38%.
An Improved Background Update Algorithm and Application in Traffic Engineering
Authors: Zhu Shi Song , Zhang Hai Yan , Zhang Cui Yun , Zhu Hong Jin
Published: August 2014

The statistical histogram algorithm is one of the common background update algorithms. Considering the statistical histogram algorithm disadvantages of large complex computation, the paper proposes an improved method named fixed window statistical background updating algorithm. The algorithm sets a window which contains N records for each pixel point firstly, every record records value in the permissible range of error and the number of pixel point occurrence, and then counting pixel values for every record through statistical histogram algorithm. When the window is full, the new pixel values will replace the smaller counting, while the pixel which counting larger will be adaptively updated by adaptive background updating formula. The experimental result shows that this method has a high real-time performance and robustness in background updating.
Finite Element Analysis of Two Wheels Scooter Based on Solidworks
Authors: Huang Zhi Dong , Du Yun Pu , Zhao Liang , Zhu Ke Gang , Ji Hong , Wang Ren Sheng
Published: August 2014

Based on Solidworks software, the three-dimensional model of two wheels scooter is set up. The finite element model of two wheels scooter is generated. Finite element analysis of telescopic mechanism of bar on two wheels scooter is investigated. The stress and strain of telescopic mechanism of bar is investigated. The stress diagram and the strain diagram are obtained. The method and the result can be used as a reference of innovative design of two wheels scooter.
The Experimental Study of Unload on Temperature Characteristics of Hydraulic Retarder
Authors: Wu Chao , Song Zhen Chuan , Tang Shou Sheng , Shan Wei Gang
Published: August 2014

The experimental study of unload on temperature characteristics is put up for heavy vehicle hydraulic retarder, forms the retarder unload testing method of temperature characteristics, confirms the relationship between the temperature of hydraulic retarder inner cavity and unload torquecavity air density, which can be used to instruct the simulation of retarder inside flow field in unload condition and actualize method to reduce air losing, and it lays the foundation for developing mechanism research to reduce air losing of retarder.
Analysis on Vibratory Subsoiler Considering Slowly Varying Parameter
Authors: Xin Li Li , Li Chuan Qi , Liang Ji Hui
Published: August 2014

According to the analysis to the motion track of the subsoiler, the influence on the motion track caused by the vibration amplitude and vibratory frequency has been reached, the system model of the vibratory subsoiler with slowly varying parameters of the soil has been built , the asymptotic method is adopted to carry out solving and analyzing, and experimental study is done by using the vibratory subsoiler. Analysis shows that the change of soil stiffness, soil damping, and soil quality parameters makes the system resonance curve shift, and the change of vibration amplitude, vibration frequency can improve the efficiency of deep scarification of soil.
Study on the Flow Field of an Undershot Cross-Flow Water Turbine
Authors: Li Yan Rong , Nishi Yasuyuki , Inagaki Terumi , Hatano Kentarou
Published: August 2014

The purpose of this investigation is to research and develop a new type water turbine, which is appropriate for low-head open channel, in order to effectively utilize the unexploited hydropower energy of small river or agricultural waterway. The application of placing cross-flow runner into open channel as an undershot water turbine has been under consideration. As a result, a significant simplification was realized by removing the casings. However, flow field in the undershot cross-flow water turbine are complex movements with free surface. This means that the water depth around the runner changes with the variation in the rotation speed, and the flow field itself is complex and changing with time. Thus it is necessary to make clear the flow field around the water turbine with free surface, in order to improve the performance of this type turbine. In this research, the performance of the developed water turbine was determined and the flow field was visualized using particle image velocimetry (PIV) technique. The experimental results show that, the water depth between the outer and inner circumferences of the runner decreases as the rotation speed increases. In addition, the fixed-point velocities with different angles at the inlet and outlet regions of the first and second stages were extracted.
Double Binding Effect on the Stability of the Structure
Authors: Zhou Chong Yang , Yang Jian Rong , Bai Yu , Su He Xian
Published: August 2014

This article uses the finite element analysis of a specific project. The effects of the double combination box girder segment of the negative moment area structure stress properties. Draw concrete thickness and its relationship to share the role. Another explores the impact of the thickness of the concrete box girder stability, in order to provide a reference point for future design work.
Optimization of the Method to Palletize Firebricks by Robot Based on Pareto Genetic Algorithm
Authors: Liu Lei , Wang Guo Dong , Xiao Rui Yi , Wang Ru Sheng
Published: August 2014

This paper discusses some specific problems in the process of palletizing firebrick by industrial robot, and then discusses the optimization of the palletizing method by proposing two optimization goals. First, a mathematical model containing two objectives for the optimization is constructed according to the palletizing problem. Then, in order to solve this optimization model, this paper uses the Pareto genetic algorithm, and states the procedure of this method in detail. Finally, an example is taken to prove the effect of the optimization model by using MATLAB.
Hardware-in-the-Loop Simulation of a Dynamic Process by Compensation of the Transfer System
Authors: He Cheng Kun , Zhang Jun Zhi , Wang Li Fang
Published: August 2014

Hardware-in-the-loop simulation is widely used for component and controller testing, for which purpose a transfer system typically comprising sensors and mechanical actuators is used to link the software and hardware subsystems. The effect of coupling the transfer system to the test system can be ignored for a steady or slowly changing process, but not for a highly dynamic process. In this paper, we propose a feedforward methodology for compensating for the coupling effect without increasing the noise bandwidth designed for a steady or slowly changing process when simulating a dynamic process. We also present an analysis of the results of the experiments in automotive engineering used to verify the proposed methodology.
Study of Elevator Flexible Sheet Metal Processing Production Line Based on Open CNC System
Authors: Niu Shu Guang , Xue Lin , Zhou Gui Yuan
Published: August 2014

In order to improve the level of automation of elevator flexible sheet metal processing production line, flexible sheet metal processing production line based on an open architecture CNC system is proposed. The basic idea of the project is combining CNC bending machine, roller conveyors, robotic welding and other general processing equipment through reasonable project, supplemented by the necessary gauge, mobile unit, feeding positioning equipment, according to the special requirements of sheet metal processing, so that automation of elevator sheet metal production can be achieved, quality of sheet metal processing improved and production costs reduced. In all, the development of the production line can reduce our dependence on labor in the Production and processing of sheet metal.
Cognitive Evaluation of Digital Monitoring HCI in Nuclear Power Plant Based on Eye-Tracking Technology
Authors: Yan Sheng Yuan , Xiao Jun , Liu Lei , Wang Ya Hui , Zhang Jing Ling
Published: August 2014

This study attempts to make cognitive evaluation about pre-optimizing and post-optimizing digital monitoring HCI in nuclear power plant through 18 quintessential eye movement data of 20 test subject using eye-tracking technology. The result suggests that the optimized monitoring system excels cognitive evaluation in fixation time, saccade distance, pupil size and other quota, thus proving its validity.
Parameters Optimization on Method of Improving Diesel Nozzles’ Flow Coefficient and Flow Uniformity
Authors: Bai Yu Jie , Cai Hong Xia , Yu Tao
Published: August 2014

This paper investigates methods to improve the flow coefficient of diesel nozzles so that the combustion efficiency can be improved and the emissions from diesels can be reduced. And abrasive suspend flow was introduced as the last process step of improving the flow coefficient and controlling the flow at a small range. To find appropriate parameters to make the measured flow after processing as far as close to the set flow, an orthogonal experiment was designed and implemented. According the analysis to the orthogonal experimental result, several line charts about the fluctuation caused by parameter were shown and a group of appropriate parameters was determinate.
Adjusting the Degree of Compensation of Small Current Grounding System Petersen Coil
Authors: Zhao Xiang Dong , Liu Feng Zhen , Tian Ye
Published: August 2014

While the system is equipped with Petersen coil caused by the switching operation can prevent a different period , single-phase disconnection and other factors neutral point displacement , so that the neutral point voltage is too high, the threat of insulation safety equipment . Also in the normal operation of the power grid , but also effectively prevent resonance over-voltage , prevent system damage caused thereby , better protection of system security , stability, and high-quality operation. Summary of small current grounding system after the formation of arc suppression coil compensation compensation network system , in order to better prevent arc short-circuiting the system of single phase , which is to ensure security of supply , improve reliability and power quality .In the paper, small current grounding system Petersen coil with the compensation adjustment is carried out and some analysis, study and research is done in order to improve the operating personnel awareness and emphasis on small current grounding system , and better ensure the safety of the small current grounding system , stable operation.
Simulation Research on Variable Frequency Flash Based on Blind Source Separation
Authors: Li Meng Da , Duan Yu Bo , Wang Yan
Published: August 2014

This dissertation proposes a method of constructing a delay matrix using the output signal sequence of single voltage transformer instead of the multiple sensor output signal arrays. The matrix satisfies the basic requirement of BSS so that each frequency component is separated from flicker,harmonics and inter-harmonics which contain a number of frequencies.
Crack Initiation Observation in Early Stage of Rolling Contact Fatigue of SUJ2 Using a Single-Ball Apparatus
Authors: Kida Katsuyuki , Hazeyama Shintaro , Sado Takuma , Mizobe Koshiro , Shibukawa Takuya
Published: August 2014

A single-ball RCF testing machine was used in order to investigate crack initiation of SUJ2 material at early stage of fatigue. This machine enables observation of a full cross section by sectioning the specimen only once. The RCF tests were carried out under a Hertzian stress of 5.3 GPa, at 3000 rpm. All of the cracks initiated from non-metallic inclusions on 300 mm2 sized area were counted, and the relation between the number of cracks and their initiation depths was drawn. Furthermore subsurface shear stress distribution was calculated. Empirical data of the crack distributions and subsurface stress distribution was compared. It was found that the crack starts growing during 3.3×104 - 1.0×105 cycles by the subsurface shear stress.
Tensile Strength Prediction of Out-of-Plane Composite Joints for Integrated Composite Cabins
Authors: Zhou Xiao Hong , Zhang Dong Hua , Zhou Long Wei
Published: August 2014

The failure of an adhesive-bonded and bolted composite joint under axial tensile loading is investigated. A progressive damage model consisting of a three dimensional FEM accompanying with a three dimensional maximum stress failure criterion and corresponding material degradation model is established to predict the failure behavior of the joint. The predicted failure load and load-displacement curve are validated by the experimental results is obtained. Moreover, the result shows that the discontinuity between two L-shaped laminates is the weak spot and required to be strengthened.
Experiment of Effects of Oil Volume-Per-Cycle on Oil Film’s Thickness under Oil-Air Lubrication
Authors: Sun Qi Guo , Zhou Zheng Hui , Wang Yue Fei
Published: August 2014

Abstract: Thickness of oil film, a parameter of an oil-air lubrication system, is an important evaluation criterion for two-phase annular flow flowed in the system. Experiment of the effects of oil volume-per-cycle on oil film’s thickness is done on a special test rig using ECT technology, and then the changing rule of oil film’s thickness is analyzed in this paper. The results show that, at the first the thickness of oil film is thinness and weakness, and then it changes to thickness and stabilization, at the last the oil focusing on the bottom of tube. The break of annular flow and the blocking of oil at elbow tube have been studied experimentally and theoretically.
Study on a Flutter Stability Control Measure of Fabricated Steel Truss Bridge
Authors: Zhang Cheng Long , Wang Qiang , He Xiao Hui , Bian En Jiang , He Jie
Published: August 2014

Abstract. To improve the flutter stability of a certain type fabricated steel truss bridge, a method of setting tuyere is put forward. Based on the two-dimensional 3 DOF coupling flutter method (2d-3DOF method), with the numerical wind tunnel established by computational fluid dynamics (CFD), the flutter stability control measures of tuyere is simulated. Through CFD numerical simulation, the flow field characteristics, flutter derivatives and critical flutter speed of origin and tuyere models are obtained. Through analysis, for the certain type fabricated steel truss bridge, the tuyere can improve its flutter stability. It illustrates the feasibility and reliability, and lays the foundation for further applied in practical projects.
Two-Machine Flowshop Problem with Release Dates, Rejection and Non-Availability Interval on the First Machine
Authors: Xie Xie , Kong Xiang Yu , Zheng Yong Yue , Wei Kun
Published: August 2014

This paper studies a two-machine flowshop problem with release dates, rejection and non-availability interval on the first machine. The non-availability interval often origins from equipments maintain or man-power. Usually, in order to pursue maximal profit, some jobs which can be rejected, and in this situation the rejection penalty should be paid. Our objective is to minimize the sum of the makespan of the accepted jobs and the total rejection penalty of the rejected jobs. For this demonstrated NP-hard in strong sense, we propose a heuristic method and further demonstrate that its worst case performance is 3.