bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on the Lubrication Problems of Driveline Gearbox
Authors: Zhang You Kun , Ju Tong Hui , Shi Tong Jie , Lu Yan Hui
Published: August 2014

Driveline gearbox includes transmission gearbox and rear axle,automotive gear oil used to lubricate gear.Take rear axle for example,through catia ,we can build three-dimensional models,and use ansa to mesh axle , then import it to fluid software fluent to analyze temperature,and obtain oil temperature curve under certain load over time;it can predict transmission efficiency and equilibrium temperature under a certain load ,and reduce gear wear and improve the operational reliability of the car.
Kinetic and Dynamic Characteristics Analysis of Timing Chain System for Diesel Engine
Authors: Xi Jia Xin , Feng Zeng Ming , Wang Guo Qiang , Guo Hai Tao
Published: August 2014

Kinetic characteristics of chain drive system were investigated in this paper and some corresponding mathematical models were established. In accordance with the theory of chain drive, based on the multi-body dynamics software platform, a dynamic analysis model of timing bushing chain system for diesel engine was established. Chain tension force, chain contact force and chain fluctuation in a rotation cycle at different running speeds were analyzed. By analysis and evaluation these results, the kinematic and dynamic characteristics of the chain drive system during the operation could be effectively recognized, this research results can provide a basis for production tests.
Modal Analysis of the Dynamic Disc of New-Type Plate-Rolling Crusher
Authors: Pei Dong Jie , Dai Chao Lei , Qin Dong Chen
Published: August 2014

The finite element analysis software Solidworks Simulation is used to the modal analysis of the dynamic disc of the new-type plate-rolling crusher, its natural frequency and main vibration modes of preceding five orders are obtained. The analysis results show that while the natural frequency of preceding two orders of the dynamic disc is closed to the engagement frequency of the gears of the reducer casing, resonance occurs. So corresponding measures of avoiding resonance are proposed, the study offers theoretical references for the dynamic design of the dynamic disc.
Lightweight Design of Absorber Spring Plate Based on Topological Optimization Method
Authors: Zhang Jie , Sun Na , Zhang Ping , Hu San Bao
Published: August 2014

HyperMesh was used to mesh the absorber spring plate, and MATLAB was used to read-in grid node coordinate file and to carry on multi-target structure topological optimization design through the self-compiled program. Objective functions include rigidity, volume and fatigue life etc. model reconstitution, CAE analysis and experimental verification were completed according to the optimization result. Results showed that optimized spring plate met the using need and lightweight design was accomplished.
A New Product Design for Fire Extinguishing Equipment Based on Quality Function Deployment
Authors: Li Yan Jun , Che Jian Ming
Published: August 2014

To design a new product for fire extinguishing equipment, knowledge about customer requirements for selecting suitable characteristics is required. And Quality Function Deployment (QFD) is proposed as an effective design method to addresses the translation of customer requirements into product functional characteristics. So this paper describes an extension of QFD method aimed at representing customer needs, technological requirements, environmental impacts and their relationships with the product functionality during the conceptual design phase. At last this method could help designers to design a new conceptual product for fire extinguishing equipment.
The Modal Analysis of Vehicle Steering System Based on ANASYS
Authors: Wang Shu Fen , Wang Li Na , Li Yu Guang , Dond Jun
Published: August 2014

The steering system is one of the most important system on the Vehicle, whose reliable function is related to the motion safety of the vehicle. In this paper, taking a simplified model of a vehicle steering system as the researched object, modal analysis of the steering system was carried out based on the finite element software ANASYS. The analysis process can be used to optimize and improve the design of the steering system, and avoid the resonance between vehicle and the uneven road.
Design on Groove Curve in Typical Section for 3D Complex Groove Turning Inserts
Authors: Feng Xin Min , Tan Guang Yu , Wu Ming Yang , Cheng Yao Nan , Liu Fei
Published: August 2014

This paper derives formula which computes the width of equivalent groove of the 3D complex groove of the indexable turning insert when cutting medium carbon steel uses the theory of chip curling and breaking. The formula was computed by MATLAB program. The calculation method of the width of equivalent groove is proposed. The cellular automaton model which designs the line-arc curve of groove of indexable turning insert with the 3D complex groove is established. One evolvement rule was confirmed and a program was designed to realize the dynamic evolvement and design of the groove curve. This research provides a base for the groove design and optimization.
Study of Vehicle Handling Stability Based on MATLAB
Authors: Li Yu Guang , Liang Chang Fei , Wang Shu Fen
Published: August 2014

In this paper, the sideslip angle and yaw velocity as parameters are presented to describing the motion state of the motion state of the vehicle, in which two DOF(degree of freedom) vehicle model is used as the reference model. And car speed is considered as the system step input to building a three DOF vehicle model based on H.B. Pacejka’s tire model. Meanwhile, the sideslip angle and the yaw velocity are taken as the system outputs. And achieve simulated analysis of vehicle handing stability by using Simulink. The results show that the three DOF vehicle model is more accurate in description of transport condition, which provides reference for the study of the vehicle steering stability.
Structural Analysis of Complex Aluminum Alloy Structural Component
Authors: Yin Xiao Wei , Qian Wen Xue , Xie Li Yang
Published: August 2014

Aluminum alloy structures are widely used in engineering practice. The advantage of aluminum alloy is light weight and corrosion resistance. For different application fields, the structures of aluminum alloy components are very different. They are typically lighter for the same strength and provide better heat conduction. As we know that do FEA (finite element analysis) is necessary before and after the alloy structures have been made. In this paper, a detail analysis was done with FEM (finite element method), and the stress distribution of alloy structures was obtained. Also the FEA results show that the maximum stress is much less than the yield stress and the stress concentration of the round is need to notice.
The Research of Quantitative Analysis Methods of Composite Structure Repair Tolerance
Authors: Liu Tian Jiao , Zhang Wei Fang , Fang Xiao Liang
Published: August 2014

In this paper, we researched the analysis methods of composite structure from a quantitative point of view. Based on reasonable assumptions, the research contents of the upper and lower repair tolerance were pointed. It was proposed that the remaining strength of damaged structural components should be used as the parameter index to analyze the lower repair tolerance, meanwhile calculating the parameter via the model of stress and interference. We could then confirm the conclusion by contrasting the references. To analyze the upper repair tolerance, we considered mainly technical level and economical efficiency, from which the upper limit could be ascertained.
Effect of Sintering Temperature and Time in Nickel Wick for Loop Heat Pipe with Flat Evaporator
Authors: Wu Shen Chun , Wu Chang Yu , Lin Weie Jhih , Chen Jia Ruei , Chen Yau Ming
Published: August 2014

This paper specifically addresses the effect of changing the constant temperature region of the sintering temperature curve in manufacturing nickel powder capillary structure (wick) on the performance of a flat loop heat pipe (FLHP). The sintering temperature curve is composed of three regions: a region of increasing temperature, a region of constant temperature, and a region of decreasing temperature, with the sintering time and temperature in the region of constant temperature having significant effect on the permeability of the wick. In this study, for wick manufacturing the temperatures in this region tested range from 550°C to 650°C and the time from 30 minutes to 60 minutes. The properties and internal parameters of the wick are measured, and the wick is placed into FLHP for performance testing. Experimental results show that at sintering temperature of 550°C and lasting about 45 minutes, maximum heat load is 200W, minimum thermal resistance is 0.32°C/W, permeability is , porosity is 66%, effective porosity is 3.8and heat flux is around 21W/cm2; related literatures have only reported maximum heat load increase of 25%.
Calculation and Analysis of J-Integral Using ANSYS
Authors: Jiang Shang Yang , Xu Jia Chu
Published: August 2014

The calculation methods of J - integral in ANSYS were analyzed, and through a case the implementation procedure of J - integral in ANSYS was illuminated. Then a comparison analysis was made between the stress intensity factor and J - integral, which obtained the same conclusion in classical fracture mechanics. It is demonstrated by the analysis. It is feasible to calculate J - integral of the material and it provides one extremely effective method for later calculation of fracture parameters.
Modeling and Simulation of Reducer’s Production Process Based on Object-Oriented Petri Net
Authors: Dong Hai , Xin Heng Bao
Published: August 2014

In order to deal well with the complexity in modeling a reducer’s production process, this paper proposes an Object-oriented Petri Net (OOPN) approach by combining object-oriented concept with Petri net theory. At first, the definitions of OOPN were given. Then, the procedure of modeling the production process with OOPN was described in detail, and the model analysis was conducted. Finally, the Flexsim software was used to simulate this model in order to find out the bottlenecks of the reducer’s process planning and some suggestions were proposed, which will lay a foundation on the optimization of its process planning.
Thermal Stress Analysis of the 1015 Engine Cylinder
Authors: Jin Xiao Yu , Tang Jin Jun , Hou Li Qun , Yulei Li , Wang Qun
Published: August 2014

To solve the thermal load problem of 1015 engine cylinder liner, based on the temperature field measured, the boundary condition of 1015 engine cylinder liner was determined, a comparatively perfect mathematic mode and a geometric model are built up, and the analysis of the three dimension temperature field of cylinder liner and the thermal deformation was performed using FEA method.
Structure Design and Simulation Analysis of Decladding Plant for Sunflower Seeds Based on Bionic Principle
Authors: Wang Kai Bao , Wang Xing Fu , Yue Chao , Wang Rui Feng , Zhao Zun Hong
Published: August 2014

The sunflower oil that has rich nutritional value is high-quality nutrition oil. The quality of oil products was impacted seriously by a lot of harmful substances that contained in sunflower seed shell. The characteristic of sunflower seeds are the kernel is smaller and the shell density is large. The shelling operation is quite difficult with the characteristic. The shelling devices for the sunflower seeds based on optimization design method and dynamics analysis is introduced in the paper. The shelling devices for the sunflower seeds can be used in the place of processing factory and individual workshop. The structure of shelling devices was designed with the 3d modeling software. In the research, the virtual prototype technology was used to simulate the kinematics and dynamics characteristics of the mechanical system. The feasibility of the design scheme of mechanical system was proved with the simulation analysis results. The equipment has advantages of the structure is compact, safe and reliable, easy to use. The research of the shelling devices for sunflower seeds can be regarded as the reference of the related research.
Self-Evolution of an Assembly Workshop in Knowledgeable Manufacturing Environment
Authors: Jiang Tian Hua , Yan Hong Sen
Published: August 2014

In this study, the self-evolution problem of knowledgeable manufacturing systems is studied by taking an assembly workshop as an example. The rolling horizon procedure (RHP) is adopted to implement the self-evolution process of the workshop. The whole dynamic self-evolution process is decomposed into several static decision processes. At each decision point, a static decision sub-problem needs to be solved. A general mathematical model of these sub-problems is built, and a bi-level genetic algorithm (BiGA) is designed. Simulation results show that the model and algorithm are feasible and effective. By comparison, the system with self-evolution operations has a better production performance.
Numerical Simulation of Deformations of Rotary and Stationary Rings of Contact Mechanical Seal Based on ANSYS Workbench
Authors: Zhang Peng Gao , Wei Long , Feng Xiu
Published: August 2014

The total deformation and contact pressure the equivalent stress of rotary and stationary rings of contact mechanical seal are numerical simulated by ANSYS workbench. The effects of spring pressure, friction coefficient, rotational speed of rotary ring, width of contact surfaces on deformation and contact pressure are analyzed. Results indicate that deformation of rotary and stationary rings increases with the increase of spring pressure and friction coefficient, however, decreases with the increase of rotational speed of rotary ring and width of contact surfaces. Contact pressure increases with the increase of spring pressure, however, decreases with the increase of friction coefficient and width of contact surfaces. The effects of spring pressure and friction coefficient on contact pressure are not obvious, and the effect of width of contact surfaces on contact pressure is very small when it is more than 3 mm.
3D Numerical Simulation of Inner Flow in a Mixed-Flow Stirred Reactor
Authors: Li Hui , Wang Rui Li
Published: August 2014

Based on the principle and method of computational fluid dynamics (CFD), using the software, FLUENT, the inner flow field in a mixed-flow stirred reactor was simulated and the flow details were studied roundly. This article analyzed the three-dimensional velocity field distribution and testified the reliability of numerical simulation to a certain extent. The simulated effect was proved effective. The results of this paper provided a good base and reference for the further research of the stirred reactor.
Study and Development of Network Manufacturing System Based on Open CNC
Authors: Pan Jian Feng , Fang Ying
Published: August 2014

This article discusses the construction of network manufacturing system based on open CNC, through combining the own characteristics of C/S and B/S architecture with CNC manufacturing units, communication is achieved by underlying network link through port design. This communication mode can guarantee real time and vast amount of data transmission, and ensure the wideness of the entire network manufacturing system, which is a strong trend of network manufacturing.
Numerical Simulation of Cylindrical Hollow Steel Specimen in Quenching
Authors: Wen Tao , Zhu Li , Sun Li
Published: August 2014

using finite element method to study the stress variation of cylindrical specimen during the cooling process of quenching, through the establishment of the computer models of mechanical property and thermal property, and using computer to perform the numerical simulation of temperature environment and structure in the process of quenching, simplify the operation process on one hand, and facilitate the analyses of complicated nonlinear problems on the other hand. The outcome according to the stress variation of the outside surface of cylinder indicates that during the process of quenching, the cooling speed of the inner surface of cylinder is much slower than that of the outer surface, leading to the reverse between the center stress and the outer surface stress of hollow cylinder, which finally turns into internal stress distribution of structural stress type.
The Design of the Horizontal Cross-Flow Scrubbing Tower
Authors: Ou Yang Lian Ge , Zhang Miao , Zhou Shui Ting , Tan Cui Can
Published: August 2014

Directed at the working conditions of waste discharging hall in a waste incineration power plant, put forward the design scheme of the horizontal scrubbing tower, used Eckert's current correlative graph and the Bain-Hogan correlation, determined the wind needed for treatment and size parameters of washing tower, worked out at the flooding point gas velocity and the wind resistance. Based on CREO, modeled a washing tower model, and established the analysis model of scrubbing tower bodies by using ANSYS. The calculation results indicate that the maximum deformation and stress are 1.9623mm and 87.7.7MPa, and all the main parameters meet the design requirements.
Research on Underwater Vehicle and Tail Gas Mass Coupling Process
Authors: Li Zhi Sheng , Zhao Xin
Published: August 2014

Rayleigh equation was applied to establish the model of the underwater vehicle tail gas mass developing process. The interrelationship of tail gas mass radius and pressure of was analyzed. The interaction equation between tail gas mass change and vehicle motion parameters was studied by coupling equation of gas mass and vehicle motion. The result shows that the simulation result agree with experimental results well, and show that the change of environment pressure with different work situations. The bigger initial pressure is, the longer oscillation period of vehicle tail pressure is. The bigger initial pressure is, the bigger initial acceleration is, but the acceleration is distinctly attenuate with time.
FEA-Simulation of Automobile Sheet Metal Hemming Process
Authors: Lin Ju Guang , Zhou Guang Rui , Wang Jian Qiang , Huang Ya Wen , Wang Qing Hua
Published: August 2014

Influence of different pre-hem paths on the flange geometry was studied first. Among these paths could be vertical, oblique, horizontal. The result of the simulation shows that the vertical pre-hem path leads to less creep. To avoid the hemming quality defects around the corner of the outer-sheet, influence of the structure of the pre-processing steel on the hemming force was studied. And finally the design scheme of the table-top hemming machine and the basic operating principle were presented.
Research on Elevator Group Control Uncertainty
Authors: Yan Dong Mei , Liu Li
Published: August 2014

Uncertainties elevator group control systems are analyzed first in this paper according to the fuzzy control theory and characteristics of the elevator group control system. Then, simulation model of elevator group control system is built using fuzzy inference system with Matlab. Operation of elevator group control system based on fuzzy control system is shown by simulation.
Research on MEMS Gyroscope Random Error Compensation Algorithm Based on ARMA Model
Authors: Chen Ming Ming , Gao Guo Wei
Published: August 2014

. MEMS device based on MEMS technology has the advantages of small volume, light weight, low cost, shock resistance, high reliability, it is widely used in the dynamic level measuring device. But due to the interference of external environment, the measurement accuracy of MEMS devices has been difficult to achieve practical application level. This paper analyzes the factors influencing the measurement accuracy of MEMS devices in the dynamic level measurement, is proposed based on the improved MEMS gyro random error compensation algorithm for ARMA model. Processed by the random error of a certain type of gyro, the test, the measuring accuracy of MEMS gyroscope has been significantly improved in the before and after filtering. After Kalman the improved filter and Kalman filter adaptive fading factor is introduced, in the static condition, the standard error of the difference of the original error are reduced to 3.75% and 4.8%, the filtering precision and dynamic environment is also effectively improved. Prove that the method is feasible and effective and is of great practical significance.
Analyzing the Effects of the Hollow Bars on Compression Experimental Setup Using Numerical Methods
Authors: Javed Raja Ahsan , Zhu Shi Fan , Guo Chun Huan , Jiang Feng Chun
Published: August 2014

For the Comprehension of the dynamic mechanical properties of the materials under the dynamic loading, Hopkinson pressure bar apparatus is used. During the compression testing of the low impedance materials the use of the hollow transmission bar is common. In the current work, the analysis is performed to analyze the effects of hollow transmission and incident bars on the specimen testing for the large diameter compression setup. Complete model of the setup is prepared using the ANSYS software and the simulation of loading is done using the LS-DYNA software. The results of analysis indicate that for the large compression testing setup, solid bars can be replaced with hollow bars. By using the hollow transmission bar the objective of high strain rate testing is also obtained.
Simulation of Automotive Galvanized Steel Stamped Parts: Experimental and Numerical Approach
Authors: Senin Azman , Mohd Nopiah Zulkifli , Jamaludin Muhammad Jamhuri , Abidin Mohd Azmir , Zaudin Muhamad Azuan , Ahmad Muhammad Afzal , Zakaria Ahmad
Published: August 2014

In the rapid new automobile development, the use of simulation technology is highly demanded due to shorter time to market and fashionable product styling that go beyond the rule-of-thumb in the manufacturing technology. In stamping simulation, the expected predictions rest with the part formability, spring back, blank optimization, and other vehicle integration works. These predictions are conducted concurrently during detailed product design, and intensive product validation is performed based on such predictions. In current work, it has established the experimental mechanical properties and flow curve data for thin galvanized sheet metal. Furthermore, the true prediction of part formability is investigated with established data and standard material database embedded in commercial simulation software. The tensile experiments were carried out on a uniaxial hydraulic tensile test machine with sheet metal specimen and in accordance to ASTM requirements. Three different sheet metal specimens were prepared from the longitudinal, transverse and 450 degrees from the rolling direction. From experimental works and formulation, the mechanical properties, anisotropy and flow curve had been obtained. Further improvement in the embedded material database increases the prediction accuracy of FEM analysis for Body-in-White structure and crash performance.
Springback-Free Sheet Metal Structural Part Design by Topography Optimization
Authors: Adzman M.S. , Zakaria A.
Published: August 2014

Topographgy optimization is a special kind of size optimization and it has been widely used to enhance the stiffness of sheet metal formed component by adding beads to the geometry. In this paper we present a methodology on how this concept can be employed in order to reduce formed part geometry deviation due to springback. An automotive part from Numisheet benchmark 2008 was used in this study. Several bead patterns were first generated by topography optimization subject to load constraints. Then the effects of these bead patterns location and size were studied by numerical forming and springback simulation. Our results show that the bead patterns have a significant effect on the springback. Finally, a methodology has been developed so that springback-free design can be incorporated in the early stage of part design.
Morphological Investigation of Alumina Asymmetric Membrane by Manipulating the Sintering Temperature Profile
Authors: Hasbullah H. , Mohamed Fadilah , Ali R.R. , Ibrahim Norazana , Hamid Mohd Kamaruddin Abd , Salleh W.N.W. , Binti Yusof Norhaniza
Published: August 2014

Ceramic materials have been widely utilized due to its attractive properties including high resistance to extremely harsh environments; chemical and heat, and its durability to the remarkable mechanical strength. Inorganic flat sheet films in this study were prepared by dry-wet phase inversion process followed by sintering method, which expected to produce very unique micro-structures leading to improvement in performance for various applications including catalytic reactions and filtration processes. Aluminium oxide was chosen as the main material due its known capability in filtration processes, membrane reactors and membrane catalysis applications. Polyethersulfone (PES) was used as an organic binder in the membrane dope formulation. Besides alumina and PES, the dope solution was consisted of N-methyl-2-pyrrolidone (NMP) and arlacel as solvent and additive, respectively. The main aim of this study is to investigate the effect of sintering temperature on the morphology and structure of the prepared membranes. Scanning electron microscope (SEM) was used to examine the membrane structure. Since the morphology of a membrane highly influences its mechanical properties, the membrane strength was measured using tensile test. From the SEM, preliminary cast membrane structure displayed a long finger-like near the outer and inner walls sandwiched a sponge-like structure that provided the membrane strength.
Preparation and Tribological Performance of Silica/Ethylene-Octene Copolymer Nanocomposites
Authors: Cao Ke Sheng , Li Song Tian , Cheng Yong Hua , Guo Xiao Liang
Published: August 2014

The maleic anhydride-grafted ethylene-octene copolymer (POE-g-MAH) and 2, 3-epoxy propoxy propyltrimethoxysilicane (KH-560) modified nano-silica particles/ POE nanocomposites were fabricated by solution coprecipitation. Tribological behaviors of these nanocomposites were investigated using a pin-on-disk friction and wear tester under dry friction condition, and worn surfaces were studied by scan electron microscope (SEM) and color 3D laser scanning microscope, respectively. The results indicated that the addition of the low inclusion (more than 10 wt%) of nano-silica particles could improve the reducing-friction and anti-wear abilities of the POE matrix composites, and modified nano-silica as the filler are superior to nano-silica in terms of the ability of decreasing friction coefficient and wear rate of the POE polymer materials. In both cases, appropriate treatments could effectively improve the mechanical and tribological properties of the POE matrix composites due to the enhanced nanosilicas-matrix interfacial bonding.
A Review of the Low-Temperature Degradation of Dental Zirconia
Authors: Aboras Mohamed M. , Theng Kai Yuan , Muchtar Andanastuti , Azhari Che Husna , Yahaya Norziha
Published: August 2014

The use of tetragonal zirconia as a dental restorative material has recently increased because of its unique mechanical and optical properties, as well as high biological compatibility with the oral cavity environment. However, the mechanical properties of zirconia can be severely degraded, which leads to the failure of dental restorations. This review focuses on the low-temperature degradation of dental zirconia and its effects on the properties of zirconia and on the oral environment. The purpose is to show the importance of this negative phenomenon and suggest guidelines for minimizing the aging of zirconia that is used as a dental restoration material.
Office Chair Design Methods Based on Dynamic Sitting Behavior
Authors: Xu Ji Feng , Zhang Han Ning , Nie Zi Chao
Published: August 2014

Human sitting posture and dynamic behavior at work are analyzed systematically by using the principle and method of ergonomics. And from the scales and functionality limited by both aspects, put forward new design ideas of office chair which are fit to modern office work so as to provide reference to design practice.
State Estimation for 4WD In-Wheel Motor Electric Vehicle
Authors: Gao Bo Lin , Chen Hui , Xie Shu Gang , Gong Jin Feng
Published: August 2014

This article proposed a Double Extended Kalman Filters (Double EKFs) observer to estimate states of 4WD in-wheel motor electric vehicle. One EKF observer was used to estimate vehicle longitudinal velocity. The other EKF observer was employed to estimate vehicle sideslip angle. The structure has two benefits: Firstly, two EKFs reduce the order of the wholly state observer, so that calculation load could be lower. Secondly, the two EKFs could be adjusted easier and more independently. The paper investigates the feasibility of this observer in two vehicle test conditions. The test results indicate the effectiveness of the Double EKFs State estimation.
Design of Double-Disc Friction and Electromagnetic Hybrid Brake System of Passenger Car
Authors: He Ren , Gu Xiao Dan , Shi Jun
Published: August 2014

The electromagnetic brake has already been acknowledged by users as one kind of contactless brake. In this paper, the basic principle and application of electromagnetic braking technology were briefly introduced first. Then the structure of the innovative hybrid brake with double disc was put forward. It employed an electromagnetic braking to reduce brake pad wear and braking system thermal recession. Based on the design requirements, the friction brake and the electromagnetic brake were designed respectively. Finally, in order to verify that whether the designed hybrid brake meets the design requirements, a bench test was carried out. The electromagnetic braking torque characteristic was tested. The results showed that the electromagnetic braking torque could approach 198N·m.Thus the design method is feasible..
Measurement Error Correction of y Coordinate in Three Dimensional Localization of Tomatoes Using Binocular Stereo Vision
Authors: Xiang Rong , Jiang Huan Yu , Ying Yi Bin
Published: August 2014

Accuracy three dimensional coordinates of fruits and vegetables are very important to harvesting robots to harvest fruits and vegetables correctly. To decrease the measurement errors of the y coordinates of tomatoes, we analyzed the measurement errors of y coordinate acquired using binocular stereo vision based on three stereo matching methods. These three stereo matching methods were centroid-based, area-based, and combination stereo matching methods. After stereo matching, the three dimensional coordinates of tomatoes could be acquired based on the triangle ranging principle. Tests of 225 pairs of stereo images of three plastic balls used as normal balls acquired at the distances from 300 to 1000 mm showed that the ranges of the measurement errors of y coordinate acquired based on three stereo matching methods changed with the image acquisition distances obviously. Moreover, the measurement errors of y coordinate appeared linear decreasing trends approximately. Therefore, binary linear regression models were set up to reduce the ranges of the measurement errors of y coordinate of three balls. These models were used as correction models of the measurement values of y coordinate and were helpful to reduce the measurement errors of y coordinate. However, there were owe correction and overcorrection conditions when the image acquisition distances were smaller and larger than 750 mm separately. Then, the correction models based on piecewise binary linear regression were used to solve this problem. The ranges of the measurement errors of y coordinate were reduced further. Tests of 225 pairs of stereo images of three tomatoes acquired at the distances from 300 to 1000 mm showed that the ranges of the measurement errors of y coordinate acquired based on three stereo matching methods were separately from [-20.9, -6.6], [-19.9, -3.44], [-19.9, -3.48] mm to [-6.84, -0.06], [-5.84, -0.82], [-5.85, -0.83] mm after the correction using the piecewise binary linear regression models. It proved that the piecewise binary linear regression models were helpful to reduce the measurement errors of y coordinate in three dimensional localization of tomatoes using binocular stereo vision.
Laser Ranging Controlling System Based on Virtual Instrument
Authors: Lv Qiong Ying , Zhang Dan Dan , Quan Ya Zhou
Published: August 2014

It has a wide range of applications in the field of domestic, meanwhile Laser Ranging has great competitive power comparing with microwave and other medium for distance measurement. At the same time, high range of frequency, data collection and processing pressure are then increased. In this paper, it puts forward a kind of Laser Ranging Controlling System based on Virtual Instrument. Using self-controlling infrared high repetition frequency laser as sending and receiving unit of the system to improve the accurate collimation and anti-noise capacity, march the alternate orientation gate .Taking usage of FPGA board as the core cell to handle large amounts of data collection in high speed. Choosing Labview Programming environment to proceed signal feature extraction, gating and storage efficiently.
A Comparison of Methodologies for Intelligent Computing Used to Integrity Analysis of a Structure Aeronautic
Authors: Parra dos Anjos Lima Fernando , Chavarette Fábio Roberto , Silva Frutuoso de Souza Simone , dos Santos e Souza Adriano , Lúcia Martins Lopes Mara
Published: August 2014

This article presents the application and comparison of two techniques for intelligent computing to perform the analysis of the structural integrity of an aircraft structure. In this context, a ARTMAP-Fuzzy neural network and immunological negative selection algorithm are used in the identification and characterization of structural failure. The main application of these methodologies is to assist in the inspection of aircraft structures aiming at detecting and characterize flaws and decision making. To evaluate the methodology was performed modeling and simulation of signals from a numerical model using an aluminum beam. We performed a comparative analysis of methodologies, proving the efficiency of intelligent methods in the analysis of structural integrity. The results obtained by the method show efficiency, robustness and accuracy. To Evaluate the methodology was Performed modeling and simulation of signals from the numerical model using an aluminum beam. We performed a comparative analysis of methodologies, proving the efficiency of intelligent methods in the analysis of structural integrity. The results Obtained by the methods show efficiency, robustness and accuracy.
Synchronization for Stochastic Complex Networks with Time Varying Delayed and No-Delayed Couping
Authors: Wang Yu Ling , Luo Yun Ling , Xie Cheng Rong
Published: August 2014

In this paper, the problem of adaptive synchronization in pth moment is considered for stochastic complex networks with time varying delayed and no-delayed couping. By using the Lyapunov Krasovskii functional, stochastic analysis theory, sufficient condition to ensure adaptive synchronization in pth moment for stochastic time varying delayed complex networks is derived. To illustrate the effectiveness of the synchronization condition derived in this paper, a numerical example is provided finally.
A New Definition of Countably PS-Compact L-Fuzzy Sets
Authors: Bai Shi Zhong , Guan Hui Mei
Published: August 2014

In this paper, we introduce a new definition of countably PS-compact L-fuzzy sets by means of pre-semi-open L-fuzzy sets and their inequality. This new definition doesn’t depend on the structure of basis lattice L which does not require any distributivity.
Linear Motor Intelligent Control System Based on LabVIEW
Authors: Liu Wei Na , Su Dong Nan , Ma Jun Ying , Yang Li Feng
Published: August 2014

In order to realize the industrial computer can control automatic adjustment of linear motor, design the linear motor control scheme based on virtual instrument technology. System driven by the control card of GE series, based on the LabVIEW development platform, realizes the intelligent control of linear motor.
Mathematical Model for Calculating Aerodynamic Characteristics of Overhead Transmission Lines
Authors: Tokenov Nurmakhan , Dzhamanbayev Muratkali , Bekbayev Amangeldi , Eskendirova Damelya , Baimuratov Olimzhon
Published: August 2014

This article is devoted to creation of mathematical models of overhead transmission lines (OHTL), taking into account the glaze. In the studying and designing of transmission lines is often necessary to construct mathematical model taking into account the influence of natural factors and all the basic physical parameters affecting or hindering them. The main difficulties arise when describing the equation of oscillations, as they nonlinear. Numerical experiments and comparative analysis with previously reported models was presented. The main setting is the critical velocity of the wind flow and its dependence on the angle of attack to OHTL.
Research on Continuous Trajectory Planning for Ultrasonic Manipulator
Authors: Zheng Hui Feng , Yu Sang Sang , Wang Yue Bing , Tang Ting Hao
Published: August 2014

For the large number of sampling points and high requirement of stabilization in ultrasonic testing,the dynamic performance of 5-dof manipulator was taken into consider: Firstly, the D-H notation and Newton-Euler were applied to set up the kinematic and dynamic equation for trajectory planning. Then the 4-3-4 polynomial which is continuous in displacement, velocity and acceleration, was used for continuous trajectory planning in joints space. Finally the trajectory based on time optimization with the constraint of velocity and acceleration including torque of actuator was validated.
An Evolving Web Service Interaction Network Model
Authors: Liu Yong Kui , Zhang Lin , Tao Fei , Wang Long
Published: August 2014

With the rapid growth of Web services on the Internet, the atomic Web services as nodes and their functionality dependency relationships as edges form a complex Web service network. Various interactions between Web services can occur along the edges, such as collaboration, competition and substitution, etc. So far, however, there lack of an effective and scalable model for generating Web service interaction networks capturing the aforementioned types of interactions, which hinders the relevant researches such as development of new service composition algorithms and the investigation of evolution mechanisms of service networks. In this paper, we propose a model which is able to generate two types of Web service interaction networks, namely complementary Web service interaction network (CWSIN) and similar Web service interaction network (SWSIN). We show that CWSIN exhibits some of the typical characteristics reported in the previous empirical studies.
Dynamic Response of Hammer Impacting Pile under Gravity Field
Authors: Chen Dong Hua , Wang Li Quan
Published: August 2014

Pile hammer impact system is composed of hammer, pile cap and pile. Gravity field will produce uneven stress in the pile which is placed on a fixed rigid plane, and gravitational potential energy will increase the impact energy which is inputted to the pile during the impact process. These will influence dynamic response of collision process between pile hammer and pile. In this paper, a gravity field factor was added in the Simth difference equations which are based on One-dimensional Wave Equation. The numerical model of pile hammer impact system was established. A program was written to implement the numerical model. Simulation results indicated that the duration of collision, the peak and stable value of impact force and the effective impact energy would be affected by the gravity field.
Analysis of Media Cloud Architecture and Security Technology
Authors: Li Chen , Jiang Zheng Tao , Huang Xiao Li
Published: August 2014

Cloud computing is an emerging technology, which has been the focus of the world since its birth. It is bound to bring tremendous and far-reaching changes to the field of information technology with its development. Because of its wide development space and huge appreciation potential, media cloud, as a branch of cloud computing, has become a research hotpot in recent years. It has achieved some preliminary results. As the rapid development and application of cloud computing becoming more in-depth, the disadvantages of cloud computing in security and personal privacy protection is much more obvious, which hinders the popularity and improvement of cloud computing. Those problems also exist in Media Cloud. This paper will analyze the characteristics of current media cloud and security problems based on the existing research at first. Then we propose a security framework model to solve this problem. At last, we will analyze the architecture of media cloud and try to investigate the security model for media cloud.
Triangulation-Based Point Cloud Data Processing Technology Research and Application
Authors: Wu Ke He , Cui Wen Chao , Cheng Bo Hao , Zhang Qian Yuan
Published: August 2014

With the "Digital Earth" concept being put forward, people are starting to focus on geospatial information technology. Traditional manual building modeling process is gradually eliminated by history due to cumbersome and inefficient work. With massive data storage and processing technologies emerging and improving, people begin to explore building point cloud data measured by laser radar technology and to use point cloud data processing software for further building boundary extraction. In the model boundary extraction process, the use of prototype with the model fit is a good, clear and easy programming algorithm and triangulation algorithm.
Improved Elliptic Encryption Algorithm
Authors: Shao Zuo Zhi , Qiao Jun Feng , Li Hao , Li Yun Peng
Published: August 2014

While the rapid development of Internet technology and communication technology, SSL VPN (security socket Layer Virtual Private Network) as a new remote access technology about network application layer, not only based on the proven SSL protocol, but meet the needs of most of network users. In recent years, enterprise networks have been widely used. However, due to its structure so that all access and calculation must be processed through VPN service, which appeared insufficient memory, computing speed to keep up with other issues. This article proposed some improvement based on these issues, using the improved algorithm to encrypt the ellipse. Keywords-SSL;VPN;Ellipsealgorithm
Research and Test on User Privilege Elevation Method in Windows 8
Authors: Du Jiang , Wang Hao , Yang Jia Yu
Published: August 2014

Windows 8 is the latest release of Microsoft operating system, the user interface, function and safety have been greatly improved. The user privilege has played a part in operating system security, which can greatly prevent worm programs. The Windows 8 privilege management inherits from Windows Vista’s UAC (User Account Control) system and improved it. Now there are two types of method to elevate user privilege, one is aim at the UAC in Ring 3 mode, the other is attack the kernel of operating system in Ring 0 mode. This paper is primarily analyzing and testing these methods.
Design and Implementation Logistics Cloud Platform Based on SOA
Authors: Zhe Zheng , Xu Ji Hui
Published: August 2014

Development of logistics enterprises have gradually become the bottleneck restricting the rapid development of e-commerce, As a rapid developing domain, logistic enterprise should serve to various kind of companies whose business requirement always change frequently. Under these circumstance ,this paper put forward an idea about logistics cloud platform based on SOA architecture ,which use IT relevant technology to achieve an IT systems which can quick response, efficient reuse and easy to be adaptive to accommodate the business need. In order to meet service characteristics of logistics enterprises, an iBOS (intelligence Business Operating System) is designed and implemented to achieve the rapid development of logistics business, customized service and other functions.
Research on Combined Prediction Model for Busy Telephone Traffic
Authors: Li Jiang Bao , Jia Zhen Hong , Qin Xi Zhong , Sheng Lei , Chen Li
Published: August 2014

In order to improve the prediction accuracy of busy telephone traffic, this study proposes a busy telephone traffic prediction method that combines wavelet transformation and least square support vector machine (lssvm) model which is optimized by particle swarm optimization (pso) algorithm. Firstly, decompose the pretreatment of busy telephone traffic data with mallat algorithm and get low frequency component and high frequency component. Secondly, reconfigure each component and use pso_lssvm model predict each reconfigured one. Then the busy telephone traffic can be achieved. The experimental results show that the prediction model has higher prediction accuracy and stability.
Analyses of Complex Networks Based on the Random Walk Model
Authors: Deng Jing Wei , Deng Kai Ying , Li Ying Xing
Published: August 2014

In this letter, we derive the analytical expressions of the degree distributions for a kind of networks model random initializing attractiveness and preferential linking, which analyzed degree evolution by using the master equation approach. We also discuss the theoretical justification of the scale-free behavior about the proposed model. The influencing range of initialization to the degree distribution only related to initialization’s expectation under the global meaning. Finally, a series of theoretical analysis and numerical simulations to the scale-free network model are conducted in this letter. The results of computer simulation is presented to the theoretical analysis.
Statistical Properties Analysis of Relay Channel
Authors: Yang Xiao Xue , Zhang Chun Yang , Wang You Zheng
Published: August 2014

The statistical properties of relay channel are quite different from the direct transmission channel for including two phases channel of source to relay and relay to destination. In this paper, we study the relay channel from three viewpoints of probability density function (PDF), level crossing rate (LCR) and Doppler spectrum for Rayleigh, Rice and Nakagami fading models. The closed form expressions are deduced, and simulation evaluation is done to verify the results.
Novel Code Acquisition Scheme for Weak GPS Signal
Authors: Li Xian Shan , Guo Wei
Published: August 2014

In this paper, we propose a novel GPS C/A code paralleled acquisition scheme with adaptive threshold setting method. The proposed threshold setting criterion is based on the ratio between the peak and the second peak which determine the signal strength over the noise. For our scheme, the detection and false alarm probabilities are derived. When the length of the received data is 200ms, simulation results show that the proposed scheme improves the acquisition sensitivity by about 2 dB in comparison with the two conventional schemes under various Doppler frequency deviation conditions.
A New Parameter Estimation Method Based on Spectrum Character in Satellite Communication
Authors: Ma Zhao Yu , Zhang Geng Xin , Bian Dong Ming , Xie Zhi Dong , Hu Jing
Published: August 2014

According to satellite communication, a novel parameter estimation method based on spectrum feature analysis is proposed. For the satellite communication signals shaped by raised cosine, the scheme enhance the efficiency of power spectrum and the square power spectrum of signals. The proposed method can estimate symbol rate and carrier frequency exactly in the satellite channel without any prior knowledge.