bluuebunny/crossref_metadata_2025 huggingface dataset:
Modeling and Simulation of Vehicle Traffic Detection System Based on Ground Sense Coil
Authors: Ju Jing Wen , Liu Jiao Yu , Yang Wei , Liu Ning
Published: July 2014

In this paper, the traffic detection system based on ground sense coil is studied. Due to the change of ground sense coil inductance, the output waveform frequence of LC oscillation circuit changes [1]. The LC oscillation circuit is composed by the three point detection circuit. Then the wave is shaped into a square-wave by shaping circuit. The square-wave is transmitted into MCU, the frequency change is detected by MCU and motor is controlled by control signal from the MCU.So when a vehicle passes above the ground sense coil, this approach makes automobile blockader lift the stop lever automatically. And the system can stop the lever falling when there is a vehicle below the lever, so this system can prevent the vehicle damage. This system can improve practical value and application prospect of a automobile blockader.
Lignite-Fired CFB Boiler SO2, NO Emission Control Technology Research
Authors: Yang Jian Meng , Wang Bi Zheng , Wang Wei
Published: July 2014

For study on SO2 and NO emission characteristics of circulating fluidized bed boiler experiments were carried out in a 300MW circulating fluidized bed boiler. In these experiments, the variables were the amount of limestone and bed temperature. While conducting the test, the reasons for the changes in emission were analyzed, and some advices about combustion adjustment were proposed.
Currency Crisis Prediction Using Wavelet-Based Support Vector Machine
Authors: Zhang Qin Li
Published: July 2014

A currency crisis is typically a kind of rare event, but it hurts sustainable economic development when it occurs. A novel method of wavelet-based support vector machine (SVM) is proposed to predict financial crisis events for early-warning purposes in this paper. In the proposed method, currency exchange rate, a typical currency indicator that usually reflects economic fluctuations, is first chosen. Then a wavelet decomposition algorithm is applied to the currency exchange rate series. Using the wavelet decomposition procedure, some details and features of the currency exchange rate series, with different scales, can be obtained. Using these details and features, a wavelet-based SVM learning paradigm is used to predict future currency crisis events, based upon some historical data. For illustration purpose, the proposed wavelet-based SVM learning paradigm is applied to exchange rate data of two Asian countries to evaluate the state of currency crisis. Experimental results reveal that the proposed wavelet-based SVM learning paradigm can significantly improve the generalization performance relative to some popular forecasting methods.
An Improved Speech Enhancement Algorithm Based on Wiener-Filtering
Authors: Liu Yu Hong , Zhou Dong Mei , Di Jing
Published: July 2014

This paper proposes an improved speech enhancement algorithm based on Wiener-Filtering, which addresses the problems of speech distortion and musical noise. The proposed algorithm adopts the masking properties of human auditory system on calculating the gain of spectrum point, in order that the signal in the enhanced speech whose energy is lower than the threshold will not be decreased further and the less distortion will be brought to enhanced speech by the trade-off between the noise elimination and speech signal distortion. What’s more, in order to eliminate the “musical noise”, a spectrum-shaping technology using averaging method between adjacent frames is adopted. And to guarantee the real-time application, two-stage moving-average strategy is adopted. The computer simulation results show that the proposed algorithm is superior to the traditional Wiener method in the low CPU cost, real-time statistics, the reduction of the speech distortion and residual musical noise.
Hidden Markov Modeling for Nakagami Fading Channel
Authors: Yang Yi Huai , Wang Li Fang , Sun Yan Ping
Published: July 2014

In this paper, we proposed a novel hidden Markov model (HMM) to approximate the characteristic of the Nakagami Fading channel. Our study is based on a Hidden Markov Model (HMM). The channel switches between ‘good’ and ‘bad’ channel situation. The transition between the sub-states of the channel is governed by a Markov Chain, which some self-return state is hidden. The performance of the model is studied by simulating probability density functions (PDF), cumulative distribution functions (CDF), level cross rate (LCR) and average fade duration (AFD).
Application with AHP in Assessment of House Plans
Authors: Zhang Bing Jiang
Published: July 2014

In this paper, we suggest and analyze a new support system for easy decision-making on housing planning. Using this, user’s can analyze their preferences by themselves individually and can select optimal alternatives. The purpose of this paper is to propose a rational decision-making system in housing planning based on the ASP (Analytic Hierarchy Process). Then, we show how standard evaluation can be decided on this system. In this paper, evaluation and election of the room arrangements is based on the information data came from users.
Algebraic Immunity, Correlation Immunity and other Cryptographic Properties of Quadratic Rotation Symmetric Boolean Functions
Authors: Huang Jing Lian , Wang Zhuo , He Mei Rong
Published: July 2014

Boolean functions with a variety of secure cipher properties are the key factors to design cryptosystem with the ability to resist multiple cipher attacks and good safety performance. In this paper, using the derivative of the Boolean functions and the e-derivative defined by ourselves as the main research tools, we study algebraic immunity, correlation immunity and other cryptographic properties of the quadratic rotation symmetric Boolean functions. We determine the quadratic rotation symmetric Boolean functions which are H Boolean functions, and the range of weight distribution of the quadratic rotation symmetry H Boolean functions. Besides, we get the compatibility among propagation, balance, correlation immunity and algebraic immunity of the quadratic rotation symmetry H Boolean functions, and also focus on the relationship of balance, correlation immunity and dimension. Furthermore, we check the existence of the cubic rotation symmetry H Boolean functions, and obtain the relationship between existence and dimension of the cubic rotation symmetry H Boolean functions. Moreover, we obtain a more convenient method for solving annihilator. Such researches are important in cryptographic primitive designs, and have significance and role in the theory and application range of cryptosystems.
Laying the Ground of Indoor Restrooms by Using Foam Glass and Waterproof Coating
Authors: Shi Shuo Mang
Published: July 2014

This article presents a new design of waterproof ground for rest rooms in basements by using new materials and new combination. First use cement mortar to paste the waterproof and heat resistance foam glass furring bricks which have low density and high strength on the ground. Then use silicon sealant to fill the gap between the bricks. Roll brush the multifunctional transparent elastic waterproof coating pure acrylic JQ - 168 on the bricks as surface. The combination of the two formed a sealed waterproof ground in indoor restrooms with certain strength and toughness. So this kind of ground surface can have stable and reliable waterproof function when in face of the situation that groundwater upwelling through fissures in concrete created by resistless damage like earthquake and so on.
Particle Swarm Optimization by Improved Chaos Immune Genetic Algorithm
Authors: Wan Shao Song , Cao Jian , Zhu Qun Song
Published: July 2014

In order to resolve these problems, we put forward a new design of the intelligent lock which is mainly based on the technology of wireless sensor network. Particle swarm optimization (PSO) is a recently proposed intelligent algorithm which is motivated by swarm intelligence. PSO has been shown to perform well on many benchmark and real-world optimization problems; it easily falls into local optima when solving complex multimodal problems. To avoid the local optimization, the algorithm renews population and enhances the diversity of population by using density calculation of immune theory and adjusting new chaos sequence. The paper gives the circuit diagram of the hardware components based on single chip and describe how to design the software. The experimental results show that the immune genetic algorithm based on chaos theory can search the result of the optimization and evidently improve the convergent speed and astringency.
Dynamic Network Model Analysis Based on Communication Network
Authors: Yuan Nan Qi , Jiang Tian , Bai Shi , Sun Hao , Zhao Jing Mei
Published: July 2014

In order to research dynamic network astringency reaching uniformity, this paper perfects the Vicsek model and puts forward improving dynamic network astringency efficiency by weighted model. We prove that the convergence rate of weighted model is faster than the classic Vicsek model and it can optimize dynamic network.
Influence of Mo Addition on a Nickel-Base Single Crystal Superalloy
Authors: Zhao Kai
Published: July 2014

The influence of minor Mo addition on the lattice misfit and creep rupture strength of a new single crystal superalloy have been investigated. It was shown that Mo can reduce the lattice misfit; increase the tendency of forming TCP phase; extend the time to material failure.
The New Class of Laplacian Integral Graphs
Authors: Lu Shi Fang , Zou Jin Yu
Published: July 2014

Graph is Laplacian integral, if all the eigenvalues of its Laplacian matrix are integral. In this paper, we obtain that the Laplacian characteristic polynomials of graphs by calculation. Characterizes the new class of Laplacian integral graphs .
An Efficient Methodology for Estimating Interconnect Crosstalk Noise in Deep-Submicron Technologies
Authors: Liu Xiao Xiao , Shao Jing Bo , Zhao Ling Ling
Published: July 2014

To solve the crosstalk noise question in deep-submicron technologies, an efficient methodology for estimating interconnect crosstalk noise is proposed in this paper. PCA and ICA techniques are applied to reduce correlations of process variations, and moment matching scheme is used to obtain the PDF of crosstalk noise in victim coupled with multiple aggressors. Experimental results show that our method maintains the efficiency of past approaches, and significantly improves on their accuracy.
Research Progress in Topological Relations of Objects with Holes
Authors: Di Shuang , Zhang Ji Mang , Shi Yun Fei , Zhang Ling Ling
Published: July 2014

The topology relation is the important basis of GIS data modeling, spatial query, spatial analysis, spatial reasoning and so on. This paper summarizes the current research progress of topological relations between complicated objects (with holes). In accordance with the order of the number of holes, respectively introduce D9-intersection model, 4-4ID model, HFM model and so on, and then analyzes their presentation skills, advantages and defects, so as to provide reference for subsequent research.
Time Complexity Research on the Second Type Neural Networks of Padé Weight Functions
Authors: Zhang Dai Yuan , Yang Lei
Published: July 2014

Time complexity is an important measure of algorithm. The main purpose of this paper is to research the time complexity of the second category of Padé weight function neural network and find out the factors which affect its time complexity. In this paper, firstly, the second category of Padé weight function neural network algorithm is introduced. Then through the analysis of the key steps of the algorithm, the time complexity is given. After MATLAB simulation, the experimental results verify the theoretical analysis of the results. Therefore, its time complexity is related to input dimension, output dimension and the number of training samples.
Superhydrophobicity of Silicon-Based Microstructured Surfaces
Authors: Li Gang
Published: July 2014

Here, a simple method was presented for fabricating superhydrophobic silicon surfaces. Square-pillar-array samples were fabricated on silicon substrates by using the femtosecond laser micromachining technology. We measured the static and dynamic contact angles for water on these surfaces. The contact angles and the rolling angles on the silicon surfaces were measured through an optical contact angle meter. Wettability studies revealed the films exhibited a superhydrophobic behaviour with a higher contact angle and lower rolling angle-a water droplet moved easily on the surface.
Research on Workpiece Deformation in Electromagnetic Forming Process with Finite Element Method
Authors: Peng Chang , Qiu Li , Gong Ke Shen , Wang Ding Jun
Published: July 2014

Electromagnetic forming is a kind of processing technology that use lorentz force to make rapid prototyping of metal workpiece, which can significantly improve the metal forming performance,and it is expected to become an emerging technology that alternative to traditional machining to process light alloy materials. Based on the understanding the basic structure of the electromagnetic coupling on the basis of physical process of electromagnetic forming, this article adopt ANSYS sequential coupling method to simulate the electromagnetic coupling process of electromagnetic structure, and analysis of tube electromagnetic forming and plate of workpiece in the process of free bulging deformation behavior. The solenoid coil tubing have an axis of symmetry due to bulging, and it’s electromagnetism load and constraint has symmetry, so its formability is uniform in hoop direction. When the plank free bulge, the distribution of the electromagnetic force caused by the flat spiral coil is not uniform,and the artifacts accelerate fastest in the part of the radius of coil 1/2, but the center area of the workpiece’s forming height is highest.
A Multifactor Grey Forecasting Model of Agriculture Output Value
Authors: Chen Wei Zhen , Liang Li Juan
Published: July 2014

In this paper, a multifactor grey forecasting model of agriculture output value is proposed. Agriculture output value is very important in the country. It can help us to well know the situation of agriculture, and to modify the policy of agriculture. When the data change greatly, one-factor forecasting model may not be get good results. Grey forecasting model with multifactor would be better. From the simulation, this multifactor grey forecasting model with gross and total farm output value can get better effects.
Mixed Features Based Improved Human Action Recognition Algorithm
Authors: Jia Hai Long , Cao Kun
Published: July 2014

The choice of the motion features affects the result of the human action recognition method directly. Many factors often influence the single feature differently, such as appearance of human body, environment and video camera. So the accuracy of action recognition is limited. On the basis of studying the representation and recognition of human actions, and giving full consideration to the advantages and disadvantages of different features, this paper proposes a mixed feature which combines global silhouette feature and local optical flow feature. This combined representation is used for human action recognition.
Impact of Tooth Shape Parameters on Strength Safety Coefficient of Herringbone Planetary Train
Authors: Zhu Zeng Bao , Shu Chao Qun , Xu Ying Li , Li Can , Yin Min
Published: July 2014

The influence of tooth profile parameters on the strength safety coefficient can provides the basis for the design of high strength herringbone planetary train system. Through calculation of the three strength safety coefficients (contact strength, bending strength, bonding strength), curves of the relationships between the tooth shape parameters (addendum coefficient, tip clearance coefficient, spiral angle) and the strength safety coefficients have been obtained and the impact of tooth shape parameters on the three strength safety coefficients have been analyzed. The research results show that the bigger addendum coefficient can be selected for the design of high strength herringbone planetary train system. In order to satisfy bending strength, no-undercut and lubrication condition the smaller tip clearance coefficient should be taken. The strength safety coefficients are bigger with the increase of spiral angle, so a bigger spiral angle may be appropriately chosen.
Design of Monitoring System for Hydraulic Support Based on LabVIEW
Authors: Tang Shan Shan , Wei Chao Kun
Published: July 2014

Hydraulic support is widely used under the mine while the pressure is the most important factors of its safety.In view of the defects about present pressure monitor of mining hydraulic support ,designing a mining hydraulic support pressure monitoring system based on LabVIEW.This article mainly introducing the overall structure of the system, hydraulic system principle, the LabVIEW program, data communication and interface design.Using LabVIEW collection and storage support’s real-time pressure information. On the basis of the single chip microcomputer and the LabVIEW for data processing and display, improving the real-time control of hydraulic support.
Spherical SrCO3 Nanopowder Synthesized by Super Gravity Method
Authors: Yang Zhan Shou , Jin Jian Hua , Li Bo , Zou Qi Xin Wu , Gang You Zhi
Published: July 2014

SrCO3 were synthesized using Sr (OH)2 solution and CO2 in super gravity reactor of carbide. It studied SrCO3 powder morphology by the dosage of the appearance agent Ethylene Diamine Tetraacetic Acid (EDTA), material flow and flow velocity and the speed of the rotating packed bed. Samples were characterized using X-ray powder diffraction (XRD) and scanning electron microscope (SEM). These products were found to be orthorhombic SrCO3 nanoparticles with 90–110 nm ranges.
Modeling and Analysis of Arresting Property of EMAS
Authors: Zhao He Huan , Yu Hong Bin
Published: July 2014

The EMAS of aircraft-pavement is a dedicated device that used to block aircraft overrunning the runway. To protect the safety of aircraft and passengers, the EMAS can safely arrest the overrun aircraft in an allowed distance and inertial load without injuring aircraft passengers and damaging aircraft. Combining with actual situation, this paper made statics and dynamics analysis under the action of the wheel of EMAS,and provides effective theoretical support for further research of EMAS of aircraft-pavement.
Buckling Stability Analysis of Parallel Micro-Spring
Authors: Zhang Jing , Sui Li , Guo Xu Hong , Liu Guo Hua
Published: July 2014

Compression deformation will cause a micro-spring to buckle, and structural parameters, constraint conditions and structural forms of a micro-spring will affect its critical load and buckling mode. In order to study the influence on the micro-spring’s stability caused by structural forms and find a structure to improve its critical load in the end, this paper designs a new kind of parallel micro-springs, which consists of two same-structured S-shaped planar micro-springs. We have carried on eigenvalue buckling analysis on the parallel micro-spring by software ANSYS, and have gotten its six orders’ buckling mode. Because the critical load of the parallel micro-spring may change with the length of the beam connecting the two sub-springs, this paper studies the effect of the beam’s length on the parallel micro-spring’s critical loads and buckling mode. From comparing the analysis results between parallel micro-spring and single micro-spring with same stiffness, this paper concludes the stability’s degree of improvement.
Feasibility Investigation for Visible-Laser Compatible Camouflage Thin Film
Authors: Zhu Li Yan , Xu Wei Dong , Wan An , Zeng Zhao Yang , Ma Yao
Published: July 2014

Based on multi-layer film interference theory and optimization calculation, a film structure that can satisfy both visible and 1064nm laser camouflage requirements were put forward. The light transmission property of the structure was analyzed systematically and the thickness and refractivity of different layers were obtained.
PWM Control for Actively Clamped Resonant DC-Link Inverter on Soft-Switching
Authors: She Yan
Published: July 2014

Due to the active inverter in industrial application, if use hard switching mode, not only may have the switch losses, but also may produce electromagnetic interference and harmonic, these power quality is affected. This paper presents the design of a soft-switching active inverter, that active clamped resonant DC-link inverter topology was used on the main circuit, the voltage space vector pulse width modulation (SVPWM) control mode was used on control circuit, using TMS320LF2407DSP programming, while the AT89C51 was responsible for liquid crystal display task, data exchanged and coordinated between double CPU. The experimental results show that, the device switching-losses can effectively reduce, the switching frequency can improve, input power quality can improve.
Design Improvement on Shipping Container Spraying Production Line
Authors: Okorie Sunday Onyedikachi , Shi Jing
Published: July 2014

This paper describes the design of a flip-frame mechanism for shipping container spray painting production line. The idea of the flip-frame mechanism is to reduce, to a large extent, paint wastage during spray painting of the quadrangular exterior surfaces of the shipping container. Clamping of the shipping container on the flip-frame is achieved by hydraulic cylinders. A roller chain and a sprocket is used to drive the flip-frame because of their simplicity, strength, ability to work under harsh condition and require little lubrication.
Research on the Optimal Design and Gear Modification of Gearbox of a Wind Turbine Based on the Virtual Prototype
Authors: He Hui Bo , Li Hua Ying , Yang Jun , Lu Guo Cheng , Gu Tao
Published: July 2014

This article describes a new mixed transmission system about the wind power gearbox. It is composed of one NGW planetary gear stage and two parallel gear stages. The modeling and optimization analysis of gearbox have been performed using Romax designer software. The load case of gear, gear modification, transmission error and Fast Fourier Transform Harmonics of wind gearbox have been carried out to investigate various performances of gearbox system. Results of the investigation show the maximum load per unit length of gear reduces about 7.2%, Transmission Error of gear reduces 74.3% and Fast Fourier Transform Harmonics decreases 77.4% after gear modification. This kind of design method has a remarkable effect on smooth running. And it provides a new research method for gear box of wind turbine.
The Influence of Diamond Graver’s Edge Radius in Diffraction Grating Scoring Process
Authors: Sun Peng , Wang Hong Wei , Zhang Xian Yu , Qiao Li Ming , Wei Xiu Ling
Published: July 2014

Diffraction grating is a kind of very sophisticated optical element, It is usually used diamond ruled grating. Edge radius is one of the important parameters of diamond ruled grating, the effect of the edge radius to diffraction efficiency and ruled depth is analyzed by the theoretical calculation and finite element analysis in this paper. Get the influence law of diffraction efficiency, ruled depth and the ruling force, which has provided the theory basis for correctly precision edge radius.
Design and Analysis of Hydraulic Piston Structure Exciter
Authors: Wang Shi Juan , Yu Ke Long
Published: July 2014

The movement characteristics of hydraulic exciting piston is a small displacement and high reversing frequency. The movement of the piston is to adapt to the requirement of quick reversing resistance. The mating surface seal uses to reduce the motion resistance to meet the requirements of the piston movement. Piston position should be in the oil chamber oil area to meet the requirements of the piston movement and oil circulation. Elastic beam with hydraulic cylinder is connected together . This structure is conducive to the piston and the connection of elastic beam and the installation of the oil cylinder. The causes of the different moving displacement of piston is leaking.
Design of Underground Gas Concentration and Humidity Monitoring System Based on RS-485
Authors: Long Yue Hong
Published: July 2014

In order to achieve long distance monitoring of gas concentration and humidity underground coal mine,a new monitor of gas concentration and humidity,which contains upper computer,master station and a lot of monitoring points,is designed.Every monitoring point is consisted of gas concentration sensor MJC4/3.0L and humidity sensor HS1101,which is used to conveys the data to master station by RS-485,again by RS-485 transmitted to the upper computer and it realizes the real-time monitoring of gas concentration and humidity undereground coal mine.
Data Storm Monitoring System of Large Power Industrial Control Network under Non Uniform Format
Authors: Liao Lang , Huang Yong Hong , Zhao Chang Jiang
Published: July 2014

In the high power industrial control network, due to the large user base, the data traffic is plodding, the data formats are inconsistent, the network data storm is difficult to monitor. A kind of high power industrial control network data monitoring and control system is designed under non-uniform formats. The network node information collector is designed, the data is collected, and the data collection result is taken as the mathematical expectation, the mathematical expectation is trained. The problem of data flow storm statistics is solved. In the system, the format conversion function is added, data storm monitoring results is taken with the format conversion, and they are stored as text format. The monitoring program reads and displays the result, the difficulties brought by the format is not unified are solved. System test results show that the system can monitor the large power industrial control network data storm, the monitoring result is precise, and it can make the formatting process fast. A size of the generated result file is 18.1%, of the original file, and can fully reflect the network data storm characteristics, the effect is perfect.
High Value Added Utilization of Vanadium Slag
Authors: Du Tao , Fang Xin , Zhang Xin Pu
Published: July 2014

Vanadium slag is a kind of common furnace slags in the metallurgical field that contains rich vanadium oxides and iron oxides. The high value added utilization of vanadium slag was exploratory studied in this paper. Under the existing experimental conditions, chemical reactions conducted between vanadium slag and concentrated sulfuric acid. Vanadium titanium catalyst was prepared with the lixivium (whose main ingredients were 44.42% of V2O5 and 29.36% of TiO2), which could meet the demand of industrial production; zeolite 4A was prepared creatively with leach residue of vanadium slag for the first time and its feasibility in CO2 capture was verified via detecting the CO2/N2 adsorption capacity. It is feasible to recycle solid wastes efficiently, reduce the environmental pollution and promote the development of CO2 reduction technology by this means.
Synthesis and Characterization of Nano Melamine Phosphate
Authors: Wang Zheng Zhou , Xu Shao Hong
Published: July 2014

nanomelamine phosphate (NMP) flame retardant was synthesized by means of a solvothermal method, and was characterized by Fourier transform infra-red spectroscopy, X-ray diffraction, and scanning electron microscopy. Effects of reaction temperature and reaction time on the morphology of reaction products were investigated. It was observed that the morphology of the products changes greatly as reaction temperature or reaction time changes.
The Brief Introduction of Several Common Subway Shock Absorber Fasteners in China
Authors: Luo Hua Peng , Cai Dun Jin , Liu Ming Liang , Wang Ping
Published: July 2014

Due to the large and medium-sized cities in our country is more; the urban rail speed is low and the environmental protection high capacity requirements. Each city urban rail structures more or less differences. Especially fastener system is various, even in the same line also exist different deduction system; Because the subway in China fastener system is various and not a fixed is widely used fastener system; The paper gives a simple summary of subway common shock absorber fasteners in China. I hope it can give a reference to researchers on fasteners.
The Multi-Body Dynamics Contact Simulation on Transmission Gears
Authors: Deng Xiao He
Published: July 2014

Based on the theory of gear dynamics and contact, the paper uses multi-rigid-body dynamics software ADAMS to build transmission simulation model. The model takes the highest shift gears of a transmission as objects to finish gear meshing simulation analysis. The corresponding meshing force and its Fourier transform results are acquired based on the analysis to get the transmission gears meshing properties.
Analog Circuit Parameters Measurement System Based on Multiplier
Authors: Wang Yong Xi , Hu Mei
Published: July 2014

For the more complicated principles and the lower accuracy for the existing methods of the measurement of the analog circuit parameters, the paper constructs a measurement system for the analog circuits parameters based on the multiplier. The signal source generates two orthogonal sinusoidal analog signals with same frequency, and then one of the signals goes through the analog circuits. Then the multiplication and filtering are completed with the two DC signals. At last the phase and amplitude of the analog circuit are obtained through the DAQ and LabVIEW software. The amplitude and phase errors are less than 3%. The results show that the system has simple circuit, fast speed and high accuracy. So it is a feasible plan for the measurement system of the analog circuit parameters at present.
Numerical Simulation of Skid Steer Loader Steering Characteristic
Authors: Ren Feng , Liu Xin Hui , Chen Jin Shi , Zeng Ping , Jia Xue Feng , Wang Qin Meng
Published: July 2014

In order to analyze the steering dynamic characteristic of the skid steer loader, refer to the theory of tracked vehicle, established the steering Kinematic and dynamic models. use AMESim software platform and Motion software platform to establish a Co-Simulation model of steering system based on theoretical analysis of skid steer loader steering travel. The results show that: the model can predict the dynamic characteristics of the skid steer loader skid steering process.
Design and Implementation of Remote Control System Based on Embedded Mobile Network
Authors: Wei Jing Xin
Published: July 2014

On employing GSM network as the way for data wareless transmission, this thesis puts emphasis on introducing operating principle of TC35i module and AT89C51 as well as the perpheral interface circuit. Meanwhile, it designs the system hardware circuit, computer control solfware and SCM system solfware with offering the application program for TC35i module and AT89C51 interface partially. After the debugging and practising, it comes to the data transmission terminal with GSM module.
Influence of Electrolysis and Plasma Polishing on Surface Properties of SUS304 Stainless Steel
Authors: Zong Xue Mei , Wang Ji , Wang Yan Fei , Liu Jian Fei
Published: July 2014

Polishing was performed by using a self-made 40kw electrolysis and plasma polishing machine, and the test specimens were SUS304 stainless steel sheets. Roughness, micro-morphology, surface chemical composition and corrosion resistance of the specimens were analyzed. The results show the surface roughness value decreases quickly from Ra=0.573μm to Ra=0.115μm in first 10 minutes polishing. After 30 minutes polishing, the surface roughness value decreases to Ra=0.066μm. Microdefects on the surface are removed obtaining the smooth surface and Cr content of the surface increases slightly as well as the other elements content is nearly unchanged after the polishing, so the corrosion resistance measured by electrochemical analyzer is improved.
Study on the Voltage Measurement in a Battery Manage System Based on LTC6802
Authors: Zhu Yu Wei , Shi Bing
Published: July 2014

This paper presents an implementation of voltage measuring system in a battery manage system, which is based on micro-controller AT90CAN32 and LTC6802 integrated circuit chips. The design for hardware and software is mentioned in the first, and then an experiment platform is set up for the function test. The test is successful and the result shows that the implementation is valuable and practicable.
Research on Multistage Horizontal Well Fracturing in the East of Sulige Gas Field
Authors: Xue Ya Fei , Li Da , Zhu Zhi Ying
Published: July 2014

Sulige gas field had been developed for a long term, but the yield is hard to keep a high value. How to improve the daily production is a key problem. In the past, we usually fracture horizontal well in single section. In this paper, we talk about horizontal well fracturing in multistage. And meanwhile, introduce some low damage fracturing fluids. Finally, fracturing evaluation shows horizontal well multistage fracturing can improve the yield effectively. This experience can be popularized in similar gas field.
Numerical Analysis of Heat and Mass Transfer Performance of the Packed-Type Parallel Flow Dehumidifier
Authors: Zhang Rui Hang , Wang Zi Ye , Niu Run Ping
Published: July 2014

TA mathematical model describing heat and mass transfer performance of packed-type parallel flow dehumidifier was set up. The numerical solution of differential equations was derived. Taking the heat and mass transfer coefficients obtained by experiments as the input parameters of the model, the impact of solution inlet parameters on outlet parameter of air was described. The simulation results indicated that the mathematical model could be used to predict the performance of liquid dehumidification. The results showed that the mathematical model can be of great value in the design and improvement of dehumidifier.
Investigation on Flat Wheel In-Suit Measuring System and Errors Compensation for Wheel Radius under Aspheric Grinding Process
Authors: Nie Feng Ming , Li Zhan Guo , Wu Qing Tang
Published: July 2014

The paper mainly studied flat wheel’s surface precision, through envelope method, the wheel is used for grinding large aperture axial symmetry aspherical surface. With non-contact measuring method, designed and developed measuring system for wheel in-suit inspection. Aimed at wheel radius errors, proposed the compensation method, so it has certain value to enhance the surface precision.
Modeling and Simulation of Feed Drive System Vibrations Based on Dual Inertia System
Authors: Luo Liang , Zhang Wei Min , Zhang Yue Lei
Published: July 2014

The motion commands to feed drives constitute a major source for excitation of the vibrations. In this paper the vibration of feed drive caused by the motion commands is simulated by using a mathematic method. The mechanical transmission system is modeled as a dual inertia system. Three typical trajectories are used to analyze the effect of motion profiles on feed drive vibration by using a simulation model of feed drive controller.
Effect of Initial Concentration of Cu2+ on the Adsorption Performance of Hydroxyapatite
Authors: Guan Yu Tong , Wang Shao Hong , Wang Mei Han , Hou Zhao Xia , Hu Xiao Dan , Wang Hao , Fan Hai Lin , Zhang Ning
Published: July 2014

Hydroxyapatite (HAP) is an effective adsorbent for removing heavy metal ions. In this study, HAP was prepared by sol-gel method and used for removing Cu2+ from aqueous solution. Initial concentration of Cu2+ in the aqueous solution was evaluated as an important parameter determining uptake. The removal efficiency and the adsorption capacity of HAP for Cu2+ were investigated. EDS analysis indicated the presence of Cu2+ on the HAP surface.
The Injection Mold Design of Clamshell Phone Upper Cover
Authors: Liang Guo Dong , Liu Jun Hui
Published: July 2014

The design of injection die on the upper cover of clamshell phone is introduced. The dual-plate die has side gate for opposite glue injection, the parts are ejected by ejector pin, the side reversed buckle contains three blocks, the reversed buckle at flip shaft consists of two inner sliders, and all the eight inner reversed buckles are made up of inclined pushing rods, and the cooling system embraces "U" shaped cooling waterway. Its application in practice has proved the reasonable die structure, smooth remolding, and qualified plastic part design.
Research on Image Vectorization Based on Dual-Thumb Pneumatic Flexible Robot Hand
Authors: Wan Shao Song , Cao Jian , Zhu Qun Song , Yan Cong
Published: July 2014

Because the traditional linear vectorization methods have some shortcomings including processing data slowly, being sensitive to noises and being easy to be distorted. Fuzzy rules and its inference mechanism are the assurance of achieving feature fusion. This paper has a design and analysis on the dual thumb pneumatic flexible robot hand base on the active flexible bending joints we have developed. The flexible joint is composed of four elongation artificial muscles with parallel arrangement. The robot hand has five multi-actuated fingers each with three flexible joints. To improve the flexibility and stability of grasp, the other four fingers are orthogonal and symmetrical except the middle finger, which forms the dual thumb oriented grasp model. Furthermore, we study on the position and posture of fingers applying the parameterized homogeneous transformation to the large deformation and nonlinear problems of flexible joint.
Temperature Control Features and Simulation Research on High and Low Gimbals
Authors: Xiao Zuo Jiang , Guo Xiao Xue , Zhu Hai Bin , Xu Zhi Gang , An Zhi Yong
Published: July 2014

In view of characteristics owned by high and low gimbals, for instance pure lag, large inertia, strongly nonlinear and so on, which was employed in low light level (LLL) weapon sight reliability detection system. The basic working principle and mathematical model of Dahlin and Smith predictive control algorithm were mainly researched. And ideal control curves were obtained by software emulation. The simulated results showed that the two algorithms each have their advantages, shortcomings and the proper situations, but as to improve the control efficiency of system, the Dahlin is superior.
Fault Diagnosis of Rolling Bearing Based on MED and Morphological Filtering
Authors: Liu Shang Kun , Tang Gui Ji , Pang Bin
Published: July 2014

One rolling bearing fault diagnosis method based on minimum entropy deconvolution (MED) and morphological filtering is proposed. Firstly, the strong background noise of rolling bearings is decreased by the MED method, then the morphological filtering which have different length of structure elements is designed and applied to the de-noised signal. Subsequently, bearing’s fault characteristic frequency is extracted by the amplitude spectrum analysis to the best morphological filtering component which have the maximum kurtosis. This method is used to analyze both a simulated bearing signal and an experimental inner ring fault signal, and the good result validated the effectiveness of this method.
Transform a Mechanical Testing Machine into High-Temperature Disk Spring Stress Relaxation Test Equipment
Authors: Zhou Xiao Yu , Yu Yi Zhong
Published: July 2014

Prediction of disk spring failure life due to stress relaxation is necessary for users; the problem was not solved before. According to special test requirement, we modified a 100N mechanical testing machine into high temperature testing equipment which can be used for different types of disk spring. With a test for 36 days on a group of 45×22.5×3.5×2.5 mm disk springs, a result of prediction of 3.38% load loss ratio after 12 years relaxation is obtained, these disk springs are qualified. Our modified equipment has the advantages of real time, heavy loading, high sensitivity and good generality.
Effect of Cr on Microstructure and Mechanical Properties of Al–3.2Mg Alloys
Authors: Zhong Zhao Jun , Zhou Ze Hua , Wang Ze Hua , Zhang Xin , Yuan Huan Long , Xue Xiao Feng
Published: July 2014

Effect of Cr element on microstructure of Al-3.2Mg alloys was investigated using optical microscopy, scanning electron microscopy (SEM) and EDS. Moreover, the tensile and hardness test were carried out. The results show that a minor additive of Cr can refine effectively the secondary dendrite arm spacing and decrease the number of coarse interdendritic structures. In the whole series of the alloys, the secondary dendrite arm spacing of Al–3.2Mg-0.1Cr alloy was the smallest, and the spacing presented an increasing trend with the Cr content. With high levels of Cr, the intermetallic compounds are formed by Cr with Al, Mg and Fe, the shape of the second phase particles were transformed from bulky bone shape to fine bone shape and long striped. The strength and the hardness of Al–3.2Mg alloys were greatly improved when the additions of Cr were 0.05% and 0.1%, but the ductility of the alloys remained at a low level by adding 0.05%Cr. Therefore, combining with the comprehensive properties and the microstructure, the best addition of Cr in the alloy was 0.10% in the whole series.
Research on the Static Cushioning Property of Folding Corrugated Cushions
Authors: Qi Yu Ming , Gao Wen Hua
Published: July 2014

0940 type cushion of E-flute corrugated paperboard is selected as the research object. By changing the load area, side breadth and the height of the cushions separately, static compression tests were done. The effects of structural parameter to cushioning property were analyzed through energy absorption method. It is useful to promote the application of corrugated board cushion.
Research on Cantilever Used for Thermal Flow Meter as Switch
Authors: Zhang Zhi Li , Wu Yuan Qing , Liu Chun Mei
Published: July 2014

In order to reduce consumption of thermal flow meter and prolong its working life, this article makes a research on cantilever switch, which control the circuit and save its energy. A cantilever was added into flow meter and was put into the air flow aisle in front of sensors. Process was designed and nanoimprint method was used to realize cantilever. The device was simulated and the effect on reducing consumption was certified, which has great significance on thermal flow meter.
Communication Module Design of Offshore Drilling Platform Cleaning Robot
Authors: Jiang Yong Xiang , Liu Jing Fang , Zhang Xing Hui , Zhao Yu Ling
Published: July 2014

Communication module design is one of the key technologies in offshore drilling platform cleaning robot, through overall design and analysis of communication systems, the communication module is selected and technology roadmap is analyzed. thus communication module hardware architecture (PC, PLC and multi-sensor ) is designed, multi-sensor (Sonar, infrared, camera, SINS, pressure sensors and fiber optic gyrocompass) underwater monitor is designed and selected, the system software is programmed (PC configuration software, PLC software and communication protocol software); Finally, control structure and running track is designed. The research ensures the operation accurately and improves the cleaning efficiency.
Methods of Metal Parts Unfolding
Authors: Li Yang , Zhang Jie Gang , Li Ji Guang , Li Yu Chen
Published: July 2014

There are a variety of sheet metal parts in rocket body structure. The exact length calculation of sheet metal structure work is the key to ensure better quality of product. This paper describes two methods of sheet metal part unfolding which are method of formula and method of software. Two quick unfolding ways using AUTOCAD and EXCEL are described aim at method of formula. Summarize the notes of using Pro/E to unfold aim at method of software. span>Parts Unfolding
Reviews on Automobile Abnormal Sound Fault Diagnosis
Authors: Tan Gui Ling , Miao De Hua , Qi Yu Ming , Deng San Peng
Published: July 2014

Automotive abnormal sound is an important manifestation of the automotive system components early malfunction. It can effectively improve safety and reliability of the vehicle system by characteristics extraction of abnormal vehicle sound and prediction of the development trend of fault. What’s more, it can solve the problem that ECU can’t identify tire failure and other problems. As a result, it will reduce the number of traffic accidents, protect human safety and property.
An Analysis of Electric Inertia Simulation Method on the Test Platform of Electric Bicycle Brake Force
Authors: Yu Zhao Xu , Yu Hong Bin
Published: July 2014

This paper analyzes the electric inertia simulation method deeply. By analyzing the brake torgue in the braking process, this paper makes a conclusion about the relationship between the moter’s torgue in the braking process and the simulation of inertia. The test uses the method of combining the mechanical simulation and electrical simulation. In this method, it invites the test platform of electric bicycle brake force, and realizes the inertia simulation. On the test platform, the results showed: by using the electric inertia simulation, the performance of the system is obviously better than the one on the test platform which using flywheel groups. This method improves the degree of automation on the test platform.
The Research of Fluid in the Cross Micro-Channel
Authors: Li Jian Yi , Zhou Wei , Zhang Xu , Jiang Yun Feng , Yang Li , Zhang Si Xiang
Published: July 2014

The phenomenon of laminar flow in the micro-channel is demonstrated by the software simulation. It shows different velocity produces different flow layer. Water-in-oil droplets are obtained by the experiments. These experiments take water as the dispersed phase and take the oil as the continuous phase. Analyze forming process and forming factors of the droplets and the column flow. The main factors of forming droplets are surface tension, viscosity shear force and the liquid velocity. The size of droplet is associated with the flow and channel width of two liquids. Changing the pressure of the inlet can obtain droplets in different size.
Fatigue Loads Prediction Based on a Hybrid Road Approach
Authors: Mei Yi He , Xie Qing Sen
Published: July 2014

Based on a hybrid road approach, a reliable process of fatigue load prediction is proposed. This approach known as Time Waveform Replication (TWR) relies on test data and multi-body model. The test data is used to back-calculate the hybrid road profile that will cause the same forces on the multi-body model. The road load is measured on the proving ground, and simulation of the multi-body model is ran by TWR to back-calculate the hybrid road profile. The simulation signals are verified by the experimental signals collected by wheel force transducers (WFT) and acceleration sensors.
Assessing the Harmonic Emission Level Based on Partial Least-Squares Regression with Data Envelopment Analysis
Authors: Li Xiang , Chen Min You , Zheng Yong Wei
Published: July 2014

A novel method is used for assessing the harmonic emission level, which is based on the partial least-squares (PLS) regression with data envelopment analysis (DEA). Based on measuring the harmonic voltage and current at the point of common coupling (PCC) and removing the inefficiency data with DEA, regression coefficients are worked out through partial least-squares algorithm. Consequently the harmonic emission level of customer is calculated.The proposed approach removes the effect of outlying data points and gets accurate estimation results. The simulation results prove that the proposed method is more effective than PLS.
Aerospace Test and Launch Process Dynamic Management System Based on the Network Diagram Method
Authors: Wang Yan , Wang Hua , Li Yan
Published: July 2014

To manage and optimize aerospace test and launch process in real time and dynamically, the aerospace test and launch process dynamic management system based on network diagram method has been designed in this paper. Firstly, we summarize the research status of test process optimization in references to find the shortages in optimization and management. Secondly, we design the system from three aspects including the process design, data management and indexes evaluation, respectively. Subsequently, the software is introduced briefly. Finally, the deficiencies of the system and improvement goal are put forwarded.