bluuebunny/crossref_metadata_2025 huggingface dataset:
Melting Characteristics of Equiaxed NH4Cl Crystals Settling in Superheated NH4Cl-H2O Melts
Authors: Zhou Peng , Wang Meng , Chen Lei , Qiu Feng , Huang Wei Dong , Zhang Jia Liang
Published: June 2012

The influence of equiaxed crystal movements in a superheated environment on the melt kinetics of the equiaxed crystals was experimentally investigated by observation of the settling and melting behaviors of NH4Cl equiaxed crystals in its aqueous solution. The experimental set-up composed of the settling tubes, water bath and video capture device, where NH4Cl equiaxed crystals were acquired in a cooling zone and then introduced into the superheated settling tubes filling with NH4Cl-H2O model alloy, and the morphologies of the equiaxed crystals were video captured for further analysis. Two kinds of morphology evolution have been observed, and the difference was related with typical spinning movements of the equiaxed crystals during their sedimentation. Changes of the length of six primary dendrite arms have been measured; the results were compared with the calculated melting rate for equiaxed crystals without any convection. It has been shown that the convection induced by the sedimentation imposes a strong influence on the melting kinetics of the equiaxed crystals.
Improving in Oxidization Kinetics of Manganese Sulfate Hydrolyzates in Alkaline Solution Media
Authors: Zou Xing
Published: June 2012

The oxidization of hydrolyzates of manganese sulfate had been investigated in ammoniacal solution. The results show that hydrolyzates of manganese sulfate are oxidized slowly by air, furthermore, their oxidization rate less depends on temperature and acidity in the ranges of their respective certain values, but the oxidization rate for hydrolyzates of manganese sulfate can be increased significantly by adding some additives, activatiing hydrolyzates or changing molecular structure of hydrolyzates.
Dynamic Experimental Study on Liquefaction Behavior of Saturated Silts
Authors: Chen Hui Qin , Wu Hui Ge , Xie Yong Ping
Published: June 2012

The liquefaction properties of silt soil which were drilled and sampled from engineering site of Tangshan area in China, were studied and analyzed by DDS-70 computer-controlled Dynamic Triaxial apparatus in this paper. And by recording the curves of dynamic stress and vibration numbers, the resisted liquefaction intensity of saturated silts were analyzed. And the enumerated experimental results of several kinds of soils can apply and guide the engineering practice in Tangshan Area.
Review of Stratified Charge Research in Oxygen-Enriched and Nitrogen-Enriched Combustion
Authors: Su De Yuan , Jin Ying Ai , Gao Qing , Che Xian Da , Xing Yun Long
Published: June 2012

This paper discusses combustion and emissions of internal combustion engine when oxygen-enriched combustion air and nitrogen-enriched combustion air are used. Nitrogen-enriched combustion can reduce the formation of NOx by inhibiting the combustion temperature in cylinder. Engine combustion is mainly subject to components of oxygen and nitrogen in the intake, the former combustion and the latter flame retardant. So we can control the two components during combustion process to re-engineering their component in the intake to the implementation control the combustion and emissions.
Introduction and Analysis of the Techniques for the Removal of Phenol from Water
Authors: Liu Dong Mei , Wang Yue , Jia Xue Bin , Zhang Dong Jun , Zou Yi , Ma Dian Dong , Liu Li Qun , Wang De Zhen , Zou Ya Chao , Zhang Jian Ming , Yin Dexin , Shan Qi , Wang Yi Ge
Published: June 2012

According to extensive literature research, we introduce and summarize both physical, chemical properties, main hazards of phenol and the recent phenol water pollutions. We get the problem that it’s hardly to meet the standard and ensure the safety of water supply because of the low removal ratio in the process of water treatment when the water source is polluted by sporadic phenol pollution. After we analyze and compare the removal technology in polluted water and potable water respectively, we know the removal ratio of polymeric aluminum chloride-powdered activated carbon and permanganate potassium- activated carbon is significantly higher than activated carbon only, but the output water couldn’t reach the standard when facing high concentration phenol pollution (500μg/L). The biological technologies and membrane methods used in waste water treatment are introducing into the potable water treatment.
Study on Alloyed Surface Layer of Wear Resistant Castings by Evaporable Pattern Castings Infiltration Process
Authors: Yang Da Chun
Published: June 2012

Wear-resistant casting was made by V-EPC infiltration process. This paper puts forward and analyses the mechanical properties and forming mechanism of the layer. The matrix material was high boron steel casting. By partial casting alloyed, the surface composite materials layer was ceramic particles, such as WC, Ferrochromium, and Borax, etc. High boron molten metal was infiltrated into the composite layer and a good cast-infiltration layer may be formed by the interaction of vacuum and high temperature. The test result shows that using this process we can get the casting surface which is special abrasion-resistance with the remarkable characteristics such as simple process and low cost. It is a new process that wear-resistant casting will be made of.
Existence and Uniqueness of Periodic Solutions for (2k)th-Order Delay Differential Equations
Authors: Liang Xin , Cong Fu Zhong , Ma Ming Juan , Zhang Yu
Published: June 2012

The existence of periodic solutions for a class of even order delay differential equations is obtained. It is useful in the delay problem of wireless beaconage. The proofs are based on combining a method of Fourier analysis with Schauder fixed point theorem. This generalizes results developed by W. Layton to high order equations
Surface Treatment and Application in Acrylic Polyurethane Coating of ZnO Nano Powder
Authors: Pang Ji Lian
Published: June 2012

In this paper, the ZnO nano powders were prepared by sol-gel method and modified with diphenyl-methane-diisocyanate (MDI). The modified ZnO nano powders can disperse in acrylic polyurethane coating homogenously. The dispersion stabilization of modified ZnO nano powders in acrylic polyurethane coating was significantly improved in comparison with the native ZnO nano powders, which was due to the introduction of grafted polymers by surface treatment. The ultraviolet absorption ability of ZnO nano powders were tested by UV spectrophotometer, when the modified ZnO nano powders are added into the acrylic polyurethane coating. The addition amount of ZnO powders is more; the ultraviolet absorption ability is stronger.
Mathematical and Dynamic Analysis of a Gompertz Ecosystem with Impulsive Control Strategy and Stage Structure for Predator
Authors: Zhao Wen Cai , Zhang Tong Qian , Chang Zheng Bo
Published: June 2012

In this paper, on the basis of the theories and methods of ecology and ordinary differential equations, an ecological Gompertz model with Holling III functional response and stage structure for predator is established. By use of the stroboscopic map, a predator extinction periodic solution is obtained, and the global attractivity of the predator extinction periodic solution is analyzed. By using comparison theorem of impulsive differential equation and small amplitude perturbation skills, we get the sufficient condition for permanence of the system under impulsive harvest strategy for the prey and maturation time delay of predator.
A Gradient-Less Shape Optimization for Elastic Contact Problems
Authors: Tian Shu Ai , Xu Ya Zhou , Wu Zhi Xue
Published: June 2012

A shape optimization method for solving elastic contact problems is proposed based on gradient-less idea(a zero order optimization method). It is found that the contact stress on the elastic contact surface can be smoothed and reduced effectively by both changing the contact surface shape and changing the shape of non-contact surface. To avoid mesh distortion that results in undesirable shape, a move stratrgy for nodal movement has been used in the finite element model. Two examples are presented to show the effectiveness of the proposed method in dealing with elastic contact problems.
Dynamic Buffeting Response Analysis of High Pier and Long Span Continuous Rigid Frame Bridge with Stochastic Wind Field
Authors: Hao Tian Zhi , Xie Xiao Li , Hao Tian Jia
Published: June 2012

The fluctuating wind field is simulated for digital by using the stationary Gauss processes, which Kaimal spectrum and Panofsky spectrum is used to the simulation of wind target spectrum with different direction and speed. According to Davenport quasi-steady buffeting force model formula, the time-history of wind velocity is converted to Buffeting force time history, which are applied to the Structure model node, combined with ANSYS for long-span continuous rigid frame bridge buffeting response analysis dynamic simulation.Taking a high pier and long span continuous rigid frame bridge as an example, analyzes dynamic buffeting response of the bridge under the action of the stochastic wind field, which as the guidance of high pier and long span continuous rigid frame bridge design work, practice has proved that the method is simple, reliable, also can be a way that dynamic analysis of buffeting response of large span bridge or tower structure under the action of stochastic wind field.
Effect of Time-Delay in a Time-Delayed Mono-Stable System Subject to White Noise and Dichotomous Noise
Authors: Zhu Fu Cheng , Li Feng Bao
Published: June 2012

The stochastic resonance (SR) for a time-delayed mono-stable system, driven by periodic square-wave signal, a dichotomous noise and a static force as well as multiplicative and additive noise is considered. It is found that the output signal-to-noise ratio (SNR) increases monotonically with the increase of the delayed time. The SNR varies non-monotonically with the intensities of the dichotomous noise and multiplicative and additive noise as well as the system parameter and the amplitude of the input square-wave signal.
Blind Separation of Non-Stationary Convoluted Mixtures Based on Time-Frequency Analysis
Authors: Wang Peng , Cao Ji Hua , Ni Xiao Chang
Published: June 2012

The signals of convoluted mixtures have a stated of non-stationary identity, and the change of their spectrum with time-varying usually could not be observed from the frequency domain, but they can be observed by the time-frequency method. Therefore, the blind separation of non-stationary convoluted mixtures based on time-frequency analysis is proposed in this paper. For the non-stationary identity, the space-albinism of the mixed matrices and the joint diagonalization of the time-frequency matrices are simulated to separate the convoluted mixtures. Two kinds of time-frequency analysis methods, Wigner-Ville distribution and improved Wigner-Ville distribution, are introduced, which are calculated with MATLAB 7.0 software. The simulated results show the improved Wigner-Ville distribution method has a better performance for blind separating of non-stationary convoluted and mixed signals.
Parallel Topology Optimization of Bi-Material Layout for Vibration Control in Plate Structures
Authors: Xue Xiao Guang , Li Guo Xi , Gong Jing Zhong , Wu Bao Zhong
Published: June 2012

This paper presents a parallel implementation process for the structural dynamic topology optimization problem. An energy flow analysis based topology optimization model is established for the objective of vibration control. The structural vibrations are excited by time-harmonic external mechanical loading with prescribed frequency and amplitude. Design variables are parameterized using Bi-material Solid Isotropic Material with Penalization (SIMP) models and Method of Moving Asymptotes (MMA) is applied for variable updating. A Parallel Finite Element (PFE) model is constructed by re-group the original finite element model. Each PFE will be computed by different processor, and then assembles together to get the global response. The efficiency and stability can be improved, which has been illustrated in the results discussion section in the end of the paper.
A Novel Global Artificial Fish Swarm Algorithm with Improved Chaotic Search
Authors: Xu Ying , Chen Hon Gan
Published: June 2012

The artificial fish swarm algorithm, it may be trapped in local optimum in the later evolution period and its search accuracy is dependent on step length which is hard to keep balance between rapidity and accuracy. Aimed at the defects of AFSA, a novel global artificial fish swarm algorithm is proposed in this paper, in which normal chaotic search on earlier stage is modified , and a differential evolution with improved chaos search was proposed to lead artificial fish into global optimum value. The experimental results show that the proposed algorithm is not only superior to traditional one but also can make the result greater.
Stochastic Resonance Enhanced by Colored Multiplicative and Additive Noises in a Time-Delayed Bistable System
Authors: Li Feng Bao , Lei Xiao Yan , Zhu Fu Cheng
Published: June 2012

The phenomenon of stochastic resonance (SR) in a time-delayed bistable system with square-wave signal, a constant force, with asymmetric dichotomous noise and multiplicative and additive colored noise is investigated. It is found that, the SR behavior can be observed on the signal-to-noise ratio (SNR) curves as a function of the intensity and asymmetry of the dichotomous noise, as a function of the amplitude of the square-wave, the constant force, as well as of the strength of the colored noises.
Gain Adjustable Intelligent Tracking Algorithm
Authors: Si Dong Sen , Wang Xiao Xu , Chen Chen
Published: June 2012

Puts forward a Gain Adjustable Fast Intelligent Tracking (GAFIT) algorithm, and realize quick and accurate location of the goal, when the detection signal is weaker. According to the size, location and output signal of the goal in four quadrant detector, the linear probe interval is determined in the four quadrant detector. On this interval, a liner relation can be get between the spot position and the corresponding output signal. The target quick location is realized with this relation. On the other hand, the sum signal of the four quadrant detector is sampled in real-time, this sum is related to the sensor’s signal strength, then the change rate of the signal strength can be get, using adaptive learning ways to get the change trend of signal strength, and realized dynamic adjustment of the signal gain, in order to improve the signal resolution ratio when signal is weak, the tracking accuracy can be improved with this way. The experimental data show that GAIFT algorithm can rapidly locate position in the linear interval and accurately track through the dynamic change signal gain for the weaker signal. tracking precision can be improved to 0.018 degrees
An Adaptive Tracking Algorithm Based on Mean Shift
Authors: Deng Zheng Hong , Li Ting Ting , Zhang Ting Ting
Published: June 2012

Object tracking is to search the most similar parts to targets in video sequences. Among the various tracking algorithms, mean shift tracking algorithm has become popular due to its simplicity, efficiency and good performance. This paper focused on mean shift tracking algorithm, which is a modeling mechanism based on statistical probability density function. In practice, when the background of the tracking and characteristics of the target are similar, pixels of background occupy a large proportion in the histogram. The traditional mean shift cannot adapt to the mutative scene. Meanwhile, if there is block or disappearance, the result is not exact. Three algorithms were given for above difficulties. A weighted template background was established, that can highlight the features of target and improve real-time. Then this paper presented a selective mechanism to update the target model. Every component is updated based on the contribution to the target model. Finally, the Kalman filter was combined with mean shift algorithm. We saw the prediction points of Kalman filter as the initial point, carried out the mean shift iteration and then updated Kalman filter using the ultimate location. Extensive experimental results illustrated excellent agreement with these methods.
A Fast Algorithm for Workspace of a Robotic Manipulator
Authors: Shi Lei , Xu Ming Heng , Liu Bo
Published: June 2012

Numerical method is extensively used to determine the workspace of a robotic manipulator. However, four or more degree manipulator mathematic models are too computationally intensive to be finished by computer. In this paper , a fast algorithm for workspace of a robotic manipulator is introduced. The method is based upon the singularity analysis of serial manipulator so that the computation amount is greatly reduced. The practical example of 6R manipulator is treated with this method. Its workspace is drawn and determined.
Force Analysis of Luffing Mechanism of Lemniscate Type Crane with Boom Driving
Authors: Li Ke Qin , Li Jun Ning
Published: June 2012

The lemniscate type crane is fabricated by Kenz-Figee B.V. of the Netherlands. There are great differences in outward appearance, geometric shape, luffing performance between lemniscate type crane and ordinary double-link type crane. Lemniscate type crane has some advantages, i.e. lower centre of weight, practical and reasonable structure, strongly anti-wind and easy operation. Based on inverse design and principle of mechanics, force analysis and luffing moment of luffing mechanism of lemniscate type crane is researched and solved.
Redundant Lifting Wavelet Packet Analysis Based on Variable Parameter and Bearing Fault Feature Extraction
Authors: Yang Zi Jing , Cai Li Gang , Chi Gui You , Yu Gen Mao , Gao Li Xin
Published: June 2012

A redundant lifting wavelet packet analysis based on variable parameter was presented, which was used to extract the weak fault features of bearing submerged in background noise. Through different choices of parameters in the design formula of predictor based on least square method of fitting, six asymmetric wavelets with various characteristics were constructed, which were then respectively used for redundant lifting wavelet packet decomposition to signal layer by layer. All the results obtained by decomposition were adopted to establish the objective function of minimum norm, through which the optimal wavelet that best matches the feature information is selected for each node signal. The node signals got by last decomposition were utilized for wavelet packet energy analysis, while the node signal with maximum energy was chosen for single branch reconstruction and envelop spectrum analysis. The proposed method above is applied to process the engineering data of bearing with fault and good results are gained by which the effectiveness of this method is well validated.
Longitudinal Dynamics Response of M-Wing Morphing Aircraft
Authors: Xu Lai Bin
Published: June 2012

A simulation methodology suitable for morphing wing aircraft is presented, accounting for the changes in both inertial and aerodynamic properties. The aerodynamics was generated with vortex lattice method and solved concurrently with 6DOF nonlinear extended equations of motion. Due to the wing morphing, there are 4 additional forces and moments exhibiting in the extended equations of motion. The simulation mythology was applied to M-wing morphing aircraft, and the longitudinal dynamic response was analyzed with the wing morphing symmetrically. The results show that the additional forces and moments influence the flight dynamic considerably
Application of Bipectrum in Mechanical Fault Diagnosis
Authors: Wu Wen Bing , Yang Shu Qun , Huang Yi Jian
Published: June 2012

Bispectrum produced by third order cumulant contains the asymmetric and nonlinear information of signal, which can be used to describe the nonlinear phase coupling, especially the quadratic phase coupling, has been widely applied in fault diagnosis. The features of fault signals and normal signals are fetched by 2-D wavelet in different directions, then these features are used to diagnose fault. The experiment shows that the method can achieve satisfactory result.
Analysis of Plastic Strain versus Different Depth between Two Fractal Surfaces under Different Deformation Characteristics
Authors: Lai Lian Feng , Gao Cheng Hui , Huang Jian Meng
Published: June 2012

A three-dimensional contact model was established between two isotropic rough surfaces exhibiting fractal behavior,and the equivalent plastic strain was discussed using the finite element analysis. The maximum equivalent plastic strain and its depth are presented with the different paths of rough solid when loading. The result showed that the equivalent plastic strain versus different depth which at different locations showed different laws, in the top area of the asperities versus different depth, the maximum equivalent plastic strain occurs in the subsurface which range about 5 um from the surface. In addition, with different deformation characteristics, the degree of the equivalent plastic strain was different. The contact model between two rough solids will lay a foundation to further research on the substance of the process of friction and wear.
Study on Dynamic Properties of Solid-Liquid Separator Entrance
Authors: Liu Zhong Bin , Zeng Tao , Hu Guang Zhong
Published: June 2012

Using of two-phase flow theory to set up liquid-solid separator inside the water and slag particles separation model, studied the strainer inlet and the relative relationship between the inlet and outlet, obtained the corresponding two-phase flow rate and the concentration distribution. It is shown that, entry form using the reverse side of slag cyclone and centrifugal separation methods to achieve the self-scouring effect and fluid, more conducive to the dispersed particles and continuous phase separation; From the strainer inlet and outlet position relationship point of view, taking into account the water uses from the side into the bottom and out from the top side is more reasonable and effective.
A New Grid Multi-Scroll Chaotic System and the Simulation Based on Labview
Authors: Huang Yong
Published: June 2012

In order to get the grid Multi-Scroll in the two directions, based on a simple unstable system, the way of the combination of the translational transform and step function was put forward to make the scrolls extending in the x and y directions in this paper. The quantity of scrolls can be controlled by two parameters N and M. A simulation system was designed with Labview to simulate grid Multi-Scroll chaotic system, it demonstrates the existence of grid Multi-Scroll chaotic attractor.
The Electrochemical Behavior of Surface Modified Spinel LiMn2O4
Authors: Yang Chi
Published: June 2012

Spinel LiMn2O4 is treated on its surface with CoO1+x/ZrO2 in this paper. Metal oxide-coated spinel LiMn2O4 was investigated with respect to electrochemical characteristics. The metal oxide coating process was carried out by using the solution method. CoO1+x/ZrO2-coated spinel LiMn2O4 exhibited stable cyclic performance in the range from 3.0 to 4.4V, and it has less electrochemical impedance, polarization and capacity loss. The cell composed of the CoO1+x/ZrO2-coated spinel LiMn2O4 can be discharged at a large current density.
Multidisciplinary Design Optimization Framework for Aeroengine Turbine Based on Life and Reliability
Authors: Ao Liang Bo , Li Yuan Sheng , Wen Zhi Xun , Li Lei , Yue Zhu Feng
Published: June 2012

The multidisciplinary design optimization(MDO) framework for aeroengine turbine based on life and reliability which covers the total process is developed. The framework consists of three parts: design module of parts, subsystem and system. The parametric model and optimization of turbine components such as rotor, stator, disk, casing and axle, can be created in parts design module. The interaction in subsystems, such as rotor-stator interaction, blade-casing gap and tenon-mortise contact problem can be solved in subsystem design module. The system design module can give out the global optimal solution of the whole turbine. The MDO for an aeroengine turbine using this framework has been taken, the results show that the framework is available.
Design and Evaluation of a Constant Flow Air Sampler
Authors: Yi Qin , Liu Jie Min , Yuan Qing Dan , Ning Zhan Wu , Shu Mu Shui
Published: June 2012

Flow stability of samplers is a key factor in air sampling. However, most of the existing air samplers have the problem of poor stability. In order to enhance the stability, a constant flow air sampler (HL-1) has been designed: a single chip processor was added to the flow control part. The performance of the sampler was presented and comparison with a conventional sampler was made. Inter-sampler comparison tests were carried out by comparing (a) the indicating error (b) the repeatability (c) the consistency of the flow and (d) the timing error with a traditional sampler. The results showed the improved sampling apparatus performed better than the traditional one in respect of stability. It could operate in a predetermined range of flow and volume in an entirely reliable and predictable manner.
Optimization Design of Wind Turbine Blades Based on BLADED
Authors: Zheng Jia Hong , Ma Hao Ran
Published: June 2012

The optimization of wind turbine blades can increase the generator power and annual output of electricity. Illustrated by the case of 2MW wind turbine, optimizing the blade chord and twist angle by POS algorithm. Modeling by BLADED, analysis the change of lift and drag coefficients, the power coefficient, maximum power of wind turbine, minimum power of wind turbine, wind turbine generating capacity before and after optimization. The results show: the aerodynamic efficiency of optimized blade increased by 4.833 than that before optimization. In the wind speed of 12 m/s (that is lower and normal speed), the average power coefficient is improved by 0.05. The minimum power of the wind turbine increased by 4% -15% .The maximum power of the wind turbine increased by 3% -9%. And the annual production of power increased by 0.25%.
Optimization of CFRP Pultrusion Process with NSGA-II and ANN
Authors: Chen Xing Kai , Jiang Bing Yan , Zhou Zhou
Published: June 2012

The temperature and curing degree of carbon fiber reinforced plastic (CFRP) are coupled during pultrusion. In order to figure out the real-time temperature and curing degree of CFRP, the heat transfer model and curing model for resin were established on the basis of curing kinetics and heat transfer theory, and solved by the combination of finite element, finite different and indirect decoupling methods. The fiber Bragg grating (FBG) sensors were utilized to monitor the temperature of CFRP on real-time during pultrusion, while the curing degree of CFRP was measured through Sorbitic extraction. Experimental results show that the simulation method is effective and reliable. According to the simulated results, artificial neural network (ANN) combined with fast elitist non-dominated sorting genetic algorithm (NSGA-Ⅱ) to optimize die temperature and pull speed for pultrusion process, and significant improvements were achieved.
Optimization Design of Drawbead Based on CAE and Neural Network
Authors: Zhang Yan Qin , Deng Zhao Hu
Published: June 2012

In this paper, application of drawbead optimization using FEM simulation and neural network was discussed for the drawing of car door. A neural network model was established to simulate the nonlinear mapping relation between the drawbead force and sheet forming parameters. The samples needed for training and testing were obtained by FEM simulation. Once the ANN trained successfully, the drawbead optimized design could be realized by using the ANN.
Competitive Adsorption Study on Natural Gas Purification of Small-Scale LNG Project
Authors: Cao Wen Sheng
Published: June 2012

The concept of modularized pretreatment of competitive adsorption was brought forward. The purification experiment measured the breaking through curves of natural gas in the compound adsorption columns of zeolite 3A and 13X molecular sieves, according to the proposed queue of adsorption modules. The experimental and simulative results indicate that the modularized competitive adsorption method of natural gas purification is feasible and effective for the small-scale LNG project.
Driving Rapid Prototyping Machine Directly within CAD System
Authors: Gu Hai Xia
Published: June 2012

The project and techniques of driving rapid prototyping (RP) machine within CAD system were researched to avoid the precision decreasement of the data transfer from CAD to RP system. The method of achieving the layer’s contour scanning data within CAD system was researched; then, the data transfer model of direct integration of CAD and RP was established; finally, tests were conducted on a polystyrene foam cutter machine with example of layer generation. Tests show that the approximate processing to 3D CAD model can be avoided during data transfer between CAD and RP, and RP machine can be driven and controlled within CAD system.
Normal Vector Based Tooth Surface Generation of Helical Noncircular Gear
Authors: Lin Jing
Published: June 2012

a general mathematical model for describing tooth surfaces of a helical noncircular gear is established. Normal vector of tooth surface is introduced to deal with the model. First the normal direction angles and modulus are solved and then tooth surface could be generated directly, logically and systematically. Some examples are given to illustrate the application of the proposed mathematical model.
Disassembly Material Analysis through Time Estimation
Authors: Ouyang Yen Ching
Published: June 2012

This paper examines the problem of assessing disassembly performance for reuse and recycling End-of-life vehicles (ELVs). The disassembly time evaluation method outlined here is shown to provide one of evidence for use during disassembly process. Moreover, in ELV recycling cases controlling performance measurement were demonstrated the elementary components of time metric. Therefore, the performance evaluation associated with disassembly performance is discussed.
Using a Hybrid Neural Network to Predict the Torsional Strength of Reinforced Concrete Beams
Authors: Huang Han Chen
Published: June 2012

This study proposes a multilayer perceptrons neural network with genetic algorithm (GA-MLP) for predicting the torsional strength of reinforced concrete beams. Genetic algorithm is used to determine the optimum number of inputs and hidden nodes of a feedforward neural network, the optimum slope of the activation function, and the optimum values of the learning rates and momentum coefficients. A database of the torsional failure of reinforced concrete (including normal-strength and high-strength concrete) beams with a rectangular section subjected to pure torsion was obtained from existing literature for analysis. We compare the predictions of the GA-MLP model with the ACI 318 code used for analyzing the torsional strength of reinforced concrete beams. We found that the proposed model provides reasonable predictions of the ultimate torsional strength of reinforced concrete beams and offers superior torsion accuracy compared to that of the ACI 318-02 equation considering both the correlation coefficient and absolute relative error.
Optimization Design of Cold Upsetting Process in Bearings Steel Ball Based on DEFROM
Authors: Fu Cai An , Tong Meng , Wang Xian
Published: June 2012

Abstract.Now the largeness of circumferential belt and 2 poles in ball billet after cold upsetting process and the consequently low material utilization ratio increase the following process time and cause a great waste. In order to obtain low allowance of ball billet, high material utilization ratio and productivity, through the research of the cold upsetting process, evaluating indicator including plumpness, roundness, cold upsetting force and volume was established, orthogonal test was designed. By the Deform simulation analysis the optimum process parameters was obtained. The results show that the optimized cold upsetting force is reduced by 35%. So the optimized process parameters has a great application value.
The Corrosion and Oxidation Resistance Improvement of DZ4 Ni-Based Superalloy Irradiated by High Intensity Pulsed Ion Beams
Authors: Mei Xian Xiu , Fu Jian Qiang , Liu Xiao Fei , Xu Jun , Wang You Nian
Published: June 2012

In this paper, the DZ4 Ni-based superalloy was irradiated by high intensity pulsed C ion and H ion beam. The parameters of ion beam were: accelerating voltage 250 kV, pulse duration 70 ns, ion current density 160 A/cm2. Irradiation pulses were 2, 5, 10 and 15. The morphology of DZ4 before and after irradiation was observed by scanning electron microscope (SEM). The phase structure and stress state were analyzed by X-ray diffraction (XRD). The results show that there were some craters on the surface of the sample after irradiation, as the irradiation time increased, the crater boundary became blurred and even disappeared. The surface tensile stress produced by initial irradiation could be relieved after several irradiations pulses. The corrosion resistance of irradiated DZ4 alloy was improved greatly. The continuous and dense α-Al2O3 layer that formed on irradiated DZ4 surface at 1000°C atmosphere increased the high temperature oxidation resistance.
Research on Optimization Design of Complex Frame Structure Based on the Power Flow Transmission Target
Authors: Huo Rui , Wang Qiang , Zhang Lei , Zhou Yi Qi
Published: June 2012

According to a problem of vibration and noise suppression of an engineering vehicle cab, the vibration transmission path is modeled by an engine-frame-cab system. The method of calculation of vibratory power flow, which is transmitted from the source engine to the receiver cab through the path frame and isolators, was deduced. And then an optimization strategy and corresponding analysis algorithm for the frame structure were proposed based on power flow objective function. The method proposed is validated through a practical case study.
Design of the Amplitude Transformer in Ultrasonic Vibration System
Authors: Wang Shan , Meng Chao
Published: June 2012

The amplitude transformer is widely applied in ultrasonic machining because it can magnify the amplitude between the ultrasonic transducer and the tool. This paper explained the experimental device of the ultrasonic vibration system, the design principles of the amplitude transformer and the design process of the conical transformer. At last, it gave the engineering drawing of the amplitude transformer.
Model Development and Robust Optimal Design of Occupant Restraint System
Authors: Wu Jun , Cao Li Bo , Zhang Rui Feng , Hu Jing Wen
Published: June 2012

In this study, an occupant restraint system model of a production SUV developed in MADYMO software was used for crash simulations. Component tests were conducted to obtain the parameters of seatbelt and seat. Parameters of airbag were obtained by tank tests and the airbag model was validated by headform drop tests. The occupant restraint system model was validated against results from real vehicle crash tests. Robust design method was adopted for sensitivity analysis and system optimization. Two parameters, spool effect of the seatbelt and mass flow of the airbag, were studied to improve the occupant protection. Better protection performance has been obtained using optimized parameters, and the robustness of the optimized result was proved by robustness assessment.
Research of Synergy Product Maturity Based on Maturity Cycle
Authors: Du Gang , Huang Qing , Sun Li
Published: June 2012

Product Maturity Level (PML) has a great significance as an important tool in impelling the development of professional product research and realizing optimization of supply and product continuous improvement. Through analyzing Product Maturity Cycle, this paper proposes Application Readiness Level (ARL) based on the study of Technology Readiness Level (TRL) and Manufacturing Readiness Level (MRL). It improves the evaluation model of PML and expands the scope of PML. Meanwhile, this paper regarded synergy products as research object, combining the backwardness advantage of product development and the aspiration of innovation in China, it develops a new PML evaluation model of high technology products. The characteristic factors, influencing factors of PML and its grades dividing had also been deeply studied and systematically analyzed, which offers guidance to product development and marketization in China.
Research on Green Design of Infant Clothing
Authors: Chen Shu Cong
Published: June 2012

Health and environmental protection have become the development trend of the future infant clothing. The basic attribute of infant clothing has transformed from beauty, wearableness to safety, comfortableness and health. In this paper, the green concept in the design of infant clothing has been researched, and the green design of infant clothing is performed in the aspect of environmentally friendly materials, modeling and colors.
Microstructure Analysis of TiC Reinforced Ni-Based Composite Coating by Plasma Cladding
Authors: Gong Jin Xia , Lu Jin Bin , Liu Ying
Published: June 2012

TiC reinforced Ni-based composite coating added with 10% TiC and 20% TiC particles were prepared on the surface of Q235 steel by plasma cladding, respectively. SEM as well as EDS and XRD were used to investigate the microstructure and formation mechanism of composite coating. The results show that between composite coating and substrate is metallurgical combination, and the microstructure of composite coating is composed of basic microstructure dendrite γ-Ni, interdendritic eutectic structure (α-Fe+Cr23C6+CrB) and dispersed TiC particle. Part of TiC particles melt when the composite coating added with 10% TiC particles, in the composite coating added with 20% TiC particles, part of TiC particles precipitate after dissolution. TiC particles have a uniform distribution with the size 3~5µm. The maximum value of micro-hardness of composite coating added with 10% TiC and 20% TiC particle is 460 HV0.2 and 620 HV0.2, respectively.
Global Strength Assessment of Trimaran Structure
Authors: Shehzad Khurram , Ren Hui Long , Zhen Chun Bo , Khurram Asifa
Published: June 2012

This paper presents structural strength assessment of trimaran by global FE-analysis. Global strength analysis using the finite-element method is a powerful tool extensively used to design well-balanced and reliable sea going vessels. This analysis technique is particularly recommended in unconventional and new ship designs. Lloyd’s Register rules (LR Rules) for classification of trimaran are used to compute design loads and load cases. Global FE analysis is performed as per direct calculation procedure of LR Rules. Maximum stress concentration locations or hot spots corresponding to each load case are identified. The stresses induced in trimaran structure for all load cases are less than the maximum allowable stress. Furthermore, some modifications in current design are suggested to reduce the stress concentrations and hence to improve the structural strength.
Parallel Control for Structural Dynamic Topological Optimization Problems Based on MMA
Authors: Xue Xiao Guang , Li Guo Xi , Gong Jing Zhong , Wu Bao Zhong
Published: June 2012

This paper presents a parallel control method for the structural dynamic topology optimization problem. The necessary and feasibility of parallel control during the optimization iteration process were discussed, respectively. The parallel control algorithm based on traditional sequential programming method was constructed by introducing MMA. The method proposed in this paper can improve the drawback of low computational efficiency and local convergence in FEA, which has been illustrated in the results discussion section in the end of the paper.
Steering Analysis of Multi-Axle Vehicle Based on ADAMS/VIEW
Authors: Zhu Yong Qiang , Zhang Ping Xia
Published: June 2012

In order to improve low-speed flexibility and high-speed handling and stability of multi-axle vehicle, a double-phase steering system was designed with planetary gear system. An in-phase steering mode is used when steering wheel turning in small angle. A adverse-phase steering mode is used when steering wheel turning in large angle. A five-axle vehicle simulation model was established with software ADAMS/VIEW. The research of all-wheel steering and non-all-wheel steering for high speed and low speed was respectively processed. When running in high speed, the lateral acceleration and yaw rate of the centroid are significantly lower when rear wheels steering in in-phase mode than the rear wheels not turning, which makes the possibility of roll and drift decrease, when vehicle overtaking in high-speed. When running in low speed, compared with rear wheels not steering, when rear wheels sreering, lateral acceleration increased by only 12.8%, yaw rate is 17.3% higher, diameter of the centroid trajectory is reduced by 12.9%, which greatly increases the mobility and flexibility of the multi-axle vehicle when turning at low speed.
Design and Simulation of Guidance Law for a Kind of Flight Test Missile
Authors: Qian Yu , Xiang Xiao Jun , Yang Jun Li
Published: June 2012

To reduce the miss distance of flight test missile, the midcourse guidance law is studied in this paper. The nonlinear projectile dynamic model is developed at first, and then designed the midcourse guidance law with the impact point prediction information. The guidance law was designed using the difference between predicting impact point and target point. To improve the guidance law’s performance, this research inducted the predicted impact point’s velocity information and integral term into guidance law command. At the end, the simulation was developed. The results of simulation show that the guidance law designed in this study is successful and it can satisfy the test missile’s flight mission requirements.
Optimization of Hood Structure Design
Authors: Li Zhe
Published: June 2012

Through measurement the sizes of the head and neck at all kinds of activity state was obtained. It was analyzed to get the parameters of the structure of hood, such as the length and the width of hood, which accord with the movement of the head and neck. According to the parameters, two-piece hood was drafted. By comparison and analysis with human body data, it can be drawn the two-piece hood is not good in fitness and aesthetics and three-piece hood is more fitted structure. The width of the middle piece has a big effect on structure of the three-piece hood. A mathematical model about the relationship between the width of the middle piece with the head circumference and hood length can be got with the multiple linear regression in SPSS, so that the optimal three-piece hood can be got just with head circumference and hood length.
Design for Refrigerator Assembly
Authors: Gao Wei Zeng , Gu Yue Sheng , Zhu Yan Li
Published: June 2012

In refrigerator industry, takt time becomes shorter with the growth of refrigerator production, product configurations become more diverse with the increase of customizing requirements, traditional data acquisition methods and manufacturing resource identification methods cannot meet the need of manufacturing execution system (MES) in job shop scheduling, work in process (WIP) tracking, rapid response of process control and so on. As an automatic identification technology, Radio Frequency Identification (RFID) can be applied to bridge the gap between physical flow of product/part and information flow in enterprise application system due to its characteristics such as automatic identification, long-distance reading, and non-line-of sight. Based on this characteristic, this paper design a real-time MES (RT-MES) for refrigerator production and successfully implements this system based on the actual situation of JAC.
Comprehensive Evaluation on Weapon System of Main Battle Tank Based on Topsis Method
Authors: Ma Run Bo , Xu Shi Meng , Dong Yu Cai , Fan Ge Hua
Published: June 2012

An integrated evaluation of the modern main battle tank based on Topsis method is discussed in this article. The method is a technique for order preference by similarity to ideal solution which can avoid the difficulty in traditional evaluations that regard the multi-evaluation parameters as a single efficiency evaluating value. The results show that this mode1 features convenient calculations，high distinguish efficiency and high stability. The article supplies a new system to the comprehensive evaluation of the modern main battle tank.
Model Reconstruction from CMM and Optical Scanning Data for Reverse Engineering
Authors: Liu Peng Xin , Liu Xuan , Ma Su Chang , Wang Li Jie
Published: June 2012

This paper introduces a novel modeling method using points acquired by a touch probe on a coordinate measuring machine and an optical scanner. An improved iterative closet point algorithm is adopted in order to transform the optical scanning data and the high precision points captured by a touch probe into a common coordinate system. A data merging method is also used to keep the high precision of feature surfaces and then unified into a precise 3D model. Experimental results demonstrate the efficiency of the presented method, which enhances the flexibility of digitization while maintaining the accuracy of feature surfaces.
The Effects of Voltage on Cu-Ce Infiltration Layer of 304 Stainless Steel by Double Glow Plasma Surface Metallurgy
Authors: Tang Feng , Xu Jin Yong , Tang Yan , Gao Cheng , Gao Peng , Gao Bo , Mo Wei Heng , Li Yuan Ming
Published: June 2012

The Cu-Ce infiltration layer was formed on 304 Stainless Steel surface by double glow plasma surface metallurgy technology. The effects of source voltage and cathode voltage on surface alloying concentration, surface hardness and infiltration layer depth were analyzed by comparative test. The results showed: In the experimental range, the contents of Cu and Ce, surface hardness, deposition layer depth increase with the source voltage increasing, which is contrary to the cathode voltage; the diffusion layer depth increases with either voltage increasing in a certain range.
Microstructure and Hardness of Surface Composite Layer Fabricated by Evaporative Pattern Casting Technology
Authors: Zhang Ran Yang , Zhao Gang Yao , Chen Yue
Published: June 2012

Surface composite layer was fabricated on the cast steel matrix using the evaporative pattern casting (EPC) technology. The pre-coating with WC and Cr-Fe particles as raw reinforcements was reacted with matrix and formed the composite layer. Then, the microstructure and hardness of surface composite layer were investigated by Scanning Electron Microscope (SEM), Olympus Microscope (OM), Energy Dispersive X-ray Spectroscopy (EDAX) and Rockwell Apparatus. The results show that the composite layer can be divided into transitive layer and penetrated layer, and the component analysis shows that the microstructure distribution of the penetrated layer is homogeneous.
Optical Design of Strong Interference of Light System for Airborne Photoelectric
Authors: Fan Yu , Wu Xue Feng
Published: June 2012

A novel optical system of emitting is discussed. The optical system is used for the interference transmission system and it is used in the photoelectric tracking equipment. The optical system consists of the light source part, a collimating optical system and a special reflection prism. The Coude light path and emitting system of strong source are used for automatically tracking and interfering with aerial or ground target. The system should be useful in the photoelectric countermeasures. The optical design could meet the requirements for the interference of light emission system.
Structural Design and Research of the Bionic Snake-Like Robot
Authors: Song Tian Lin , Lu Ya Ping , Li Zhi Yao
Published: June 2012

After analyzing snake body structure, the paper introduces a novel structural design of bionic snake-like robot which can qualify 3D movement. And 3D bionic snake-like robot is invited. The robot can simulate the real snake to do such action as winding, turning, spiraling, rising head and ducktail etc.