bluuebunny/crossref_metadata_2025 huggingface dataset:
The Design of Omni-Bearing Translation and Rotary Windows
Authors: Chen Bin , Zheng Hui Meng
Published: October 2012

In view of many problems of the windows existing in the current market ,to design omni-bearing translation and rotary windows can solve the problems of cleaning the ordinary windows .At the same time, regulating the rotation angle of the windows can change the ventilated area arbitrarily and improve the residential environment .The windows includes five parts: gearing mesh structure, cap button device, window frame guide groove structure, magnetic induction structure and window locked structure.
Multi-Position Self-Calibration Method of Inertial Navigation System
Authors: Zhang Ji Wei , Xu Xiao Dong , Wang Bo
Published: October 2012

In order to solve the problem that in the dual axle rotating modulation inertial navigation system the angle between the horizon roller of the system and horizontal plane can't be removed, this paper provides an on-line self calibration method based on inertial navigation system, and this method realized the on-line self calibration of the inertial navigation system by calculating bias and scale factor both of the gyroscope and accelerometer, solving the problem that in the dual axle rotating modulation inertial navigation system the angle between the horizon roller of the system and horizontal plane can't be removed, providing an calculable basis for the prediction of attitude angle and realizing on-line autonomous self-calibration.
Application of the Real-Time EtherCAT Technology in Wind Power Control System
Authors: Wang Xiang Ming , Wang Jin Chao , Sun Dong Hua
Published: October 2012

In this paper, the real-time EtherCAT technology is introduced in detail, which including operating principle, communication protocol and the superiority performance of EtherCAT i.e. synchronicity, simultaneousness and high speed. To show how to design a slave system that considering the characteristics of application, the method of developing systems based no EtherCAT technology are proposed. Finally, a data acquisition system based on EtherCAT technology is designed. Application of EtherCAT technology can improve the real-time characteristics of data communication in wind power system.
Computer-Aided Calculation of the Box Centroid of Linear Vibration Screener
Authors: Wang Zhi Wei , Meng Ling Qin
Published: October 2012

In the design of the vibration screener, the calculation of screen box centroid has direct impact on the performance of the vibration screening machine. In traditional design, calculation of the screen box centroid is carried out through repeated calculations and the adjustment of the vibrator installation, of which the calculation process is tedious with low accuracy. This thesis deduces the formula of calculating screen box centroid by the way of mass decomposition method, and programs for calculation of the box centroid of Linear vibration screener through C language. With the computer aid, the present author realizes the accurate calculation of screen box centroid and enhances the level of design for vibration screener.
Based on Active Vibration Control Technology of Signal Acquisition System Research
Authors: Chu Jia Wei , Xu Rui Hua , He Jun Hua , Wei Ming Zhi , Wang Wei
Published: October 2012

The principle of full vibration signal acquisition system is introduced. This article through the use of PSD high resolution, the characteristics of the corresponding speed, put it to use in vibration measurement, and introduces the realization method, Including the front optical, electrical and late signal processing, And through the concrete experimental data, and verifies the feasibility of the scheme.
Decomposing the Non-Gaussian Surface in Sum of Gaussian Surfaces
Authors: Qi Zhang Xing , Wu Zhen Sen , Yu Zi Wen , Li Hai Ying
Published: October 2012

The decomposition of the multivariate Non-Gaussian PDF in the sum of a Gaussian PDF instead of the Gram-Charlier series is investigated. Four parameters need to be found by minimizing the integrated square of the difference between Cox-Munk function and its approximation. The backscattering radar cross section (RCS) of the surface is calculated by the Kirchhoff approximation (KA) under different value of k using the formula of decomposition of the Non-Gaussian. The condition of KA satisfying electromagnetic scattering scale from Gaussian and Non-Gaussian surfaces is taken into account by computing the backscattering coefficients in HH and VV polarity.
Autonomous Vehicle Trajectory Planning under Uncertainty Using Stochastic Collocation
Authors: Liu Hong Fu , Zhang Yu , Chen Shao Fei , Chen Jing
Published: October 2012

We propose a framework based on stochastic collocation to solve autonomous vehicle optimal trajectory planning problems with probabilistic uncertainty. We model uncertainty from the location and size of obstacles. We develop stochastic pseudospectral methods to solve the minimum expectation cost of differential equation, which meets path, control, and boundary constraints. Results are shown on two examples of autonomous vehicle trajectory planning under uncertainty, which illustrated the feasibility and applicability of our method.
Research on a Method of EDM Control System Based on Two Positioning Mode
Authors: Huang Xiao Liang , Luo Yong Jiang , Lin Hai Bo , Zhang San
Published: October 2012

The processing of three-dimensional structure and servo feed systems for micro-EDM have strict requirements.The two positioning method is used to solve the contradiction between the large stroke and high precision, Coarse and fine action units matched to achieve the precision positioning requirements. A combined device with piezoelectric ceramic and step motor has been employed as drive and use the linear rolling guide As the transmission in this study,which has strong control function ，great flexibility, high positioning accuracy and repeatability. The basic performance of the platform met the needs of micro-EDM control.
The Failure Mechanism of Bucket Teeth of Electric Excavator Used in Metal Mine
Authors: Qiu Chang Ming , Wang Yan Feng , Xing Shu Ming , Guo Li Jun
Published: October 2012

Bucket teeth of electric excavator used in metal mine bear severe impact and friction, so their life is short and this have an negative effect on productivity. The paper analyzes the case of failure and material of bucket teeth, and researches into the mechanism of abrasion of bucket teeth and distinguishing feature of the work hardening of ZGMn13, and draw the conclusion that it is correct to choose ZGMn13 as material of bucket teeth used in metal mine. Improve configuration of bucket teeth or enhance the abrasion resistance can prolong the service life.
The Research on Vehicle Anti-Braking System Control Algorithm Based on Immune PID Control
Authors: Jiang Ke Rong , Dong Bo Lin
Published: October 2012

Because the classic PID control doesn’t satisfy the demand of automobile ABS in all conditions and it is short of an ability of identifying road surface, fuzzy control is short of an ability of remove systemic stable error and it doesn’t make automobiles keep higher control precisions. a dynamic mode of the wheels is built when an automobile is braking at first, aiming at automobile ABS, a immune PID control algorithm based on classic PID is presented and used in automobile ABS system. Compared with the classic PID control algorithm and fuzzy control algorithm, the simulation result shows that the immune PID control algorithm has a shorter stabilization time, a smaller excess of system output, fewer response time and shorter braking distance, it is superior to the classic PID control algorithm and fuzzy control algorithm. The immune PID control algorithm has a higher application value.
Computation of 2D Manifold Based on Generalized Condition
Authors: Wu Zhong , Jia Meng , Ji Qing Hua
Published: October 2012

The new algorithm uses the idea of growing the manifold. The preimage of the new point is found quickly with a method called gradient prediction scheme and a new accuracy criterion is proposed. Furthermore, our algorithm is capable of computing both stable and unstable one dimensional manifold.
Video Detection System Design of Meshing Depth of Elevator’s Door Lock
Authors: LU Zhi Yuan , Zhao Bo , Liu Tie , Song Yun Peng , Zhang You Meng
Published: October 2012

The detection of meshing depth of elevator’s door lock is an important content in the detections of elevator safety performance. Based on machine vision and the principle of image processing, this paper established a detection system of meshing depth of elevator’s door lock, and designed a handheld instrument. Combined with the environment of building for the detection of meshing depth of elevator’s door lock, this paper developed a software system suitable for multiple door locks. The detection system used industrial camera for the image acquisition of door lock’s meshing, and the images would be processed automatically in the micro computer. The instrument is easy to carry. The paper designed two ways including the offline and online automatic calibration for the instrument of video imaging. This paper solved the synchronization problem of image snapshot when the moment of conduction for door lock’s circuit. The detection way has no damage and interference from door lock’s circuit and ensures the independence of detection process.
The Dynamics Analysis of the Linear Vibrating Screen Machine
Authors: Wang Zhi Wei , Meng Ling Qin
Published: October 2012

According to the linear vibration theory and the Lagrange Equation, this paper makes an analysis of dynamics and establishes the dynamics equation of linear vibrating screen machine system and then confirms the relationship among its vibration mass, the supporting spring stiffness , the mass of eccentric block and vibration circular frequency, it provides conditions for the precise design of the linear vibration screening machine’s bearing spring and the accurate calculation of the screening processing capacity,and it provides a basis for the vibrating screen machine’s force analysis and its strength calculation. By designing the supporting spring of the ZKB3675 linear vibrating screen machine, it verifies the practicality of the dynamics equation which is established in this paper.
Influence of Stelmor Cooling Procedure on Eutectoid Transformation of Segregation in 82B Wires
Authors: Wang Li Feng , Wang Meng , Wang Li Ping
Published: October 2012

The character of microstructure in the segregation of 82B wire with two different stelmor control cooling procedures and kinetics of eutectoid transformation of segregation through thermal simulation in the range of 400-600°C were researched. The longitudinal section segregation microstructure and composition were analyzed by OM、SEM、WDS. The thermal simulation results show that the length of martensite segregation bands is decreased as holding time increases above a certain temperature, and martensite band in the core of wire where the content of Mn and Cr elements is higher than matrix because of segregation. Furthermore, Stelmor control cooling experiments in the high speed wire mill confirms that there is a critical temperature to 82B wire above which the eutectoid transformation in the segregation is possible, and enough time above the critical temperature in the Stelmor control cooling lids is the key to optimizing procedure.
Research on Device of Hydraulic Pushing
Authors: Liu Kai , Zhou Hai Ying , Jiang Ming
Published: October 2012

The new device of hydraulic pushing device achieves enclasping of clamping device and steel rail locking effect by the wedge clamping on the both side of the steel rail, so as to provide thrust and pulling force action point for the cylinder of hydraulic equipment. Compare with other devices, the new type of device has more advantages like : simple structure, reliable clamp, easy erection and high efficiency. To further optimize the mechanical clamping device, the pressure and the friction coefficient of the wedge. the shell and the rail were analyzed emphatically. Combining experimental data and the reasonable angle of wedge and optimizing design direction was applied.
The Design of Control System Based on Motion Control Card for Automatic Biochemical Testing Device
Authors: Zhang Yan Hua , Dong Niu
Published: October 2012

A control system based on GE-300-SV-PCI-G motion control card is designed and developed. The hardware of the control system is achieved with the division of functional modules with the analysis of this biochemical testing device. Then the software realizing corresponding detection process is programmed with the method of open and independent programming. In this paper, the multi-threaded programming method is used to solve the problem of software compatibility. Also the movement accuracy of the biochemical testing device is verified with a motion accuracy detection experiment.
Design of Automatic Transition Flight Control System for Helicopter
Authors: Yao Cong Chao , Wang Xin Min , Wang Xiao Yan , Huang Yao
Published: October 2012

To realize anti-submarine task for helicopter, a new automatic transition flight control system is developed. In order to simulate the real situation that wireless electric instrument altitude signal has the noise, wave model is introduced and filter is also designed to deal with this real problem. The system has an excellent operation characteristic. According to the basic requirements of the mode, height control loop and portrait velocity control loop are designed to accomplish the specific flight maneuver. Through the effect of comparator and limiter, during the automatic transition process, height and speed channels can be controlled cooperatively. The two loops cooperate together to guarantee that the velocity decreases to zero synchronously with the height descending to the expected height. Simulation indicates that control simulation system designed can be response to the real situation well, and control structure has good resistance to vertical wind disturbance and robustness.
Study on Dynamic Shifting of Power Split CVT (PSCVT)
Authors: Zhang Lan Chun , Bei Shao Yi , Li Guo Qing
Published: October 2012

In order to study the shift control of power split continuously variable transmission (PSCVT), the integrated shift dynamic models for the set of engine, magnetic powder clutch and transmission are established. The shift simulation shows that the magnetic powder clutch connecting condition can be adjusted and the shifting quality can be improved by means of controlling magnetic powders clutch field current, which at last result in the improvement of vehicle performance.
Railway Culvert CAD Software System
Authors: Li Jie Wen , Guo Jian Bo , Zhang Guo Bi , Li Bang De
Published: October 2012

With the development and the widespread application of computer technology, some of the country's railway professional designing institute and software companies have introduced many culvert design application software. There are many culvert CAD system have been applied in engineering practice, but from the view of practical application and software development, there also have many shortcomings, such as the operation is inconvenient, the function is not perfect, the mapping function does not conform to the designing habits, the function of inheritance and generality is not strong, the management functions of design information and design results is lack and so on.This paper aims at the standardization; normalization characteristics of culvert designing, the parameterization culvert design method were studied, analyzed the data organization structure, the culvert length calculation method, the parametric design and drawing method, then based on them, use the object-oriented programming method, at the VC++6.0 programming platform, developed the railway culvert CAD software systems which based the ObjectARX technology.The software system which has been developed realized the engineering quantity calculation, engineering drawing and engineering quantity form output, improving the efficiency of culvert designing and mapping.
The Development of Virtual Design Platform for Couplings
Authors: Chang De Gong , Dou Hong Yun , Zhou Guang Zhen , Zhang Li Zeng
Published: October 2012

This platform is based on virtual technology, taking the twin tripod slider universal coupling as three-dimensional solid model and integrating the functions of Pro/E and ANSYS. Using JAVA and VRML language develop and build the intelligent virtual design platform, which includes the parametric modeling, FEM Analysis, experiment data testing and optimization design. Based on this platform, we can achieve high efficiency of coupling’s design and research.
Design of the Novel Calibration Platform for Piezoelectric Dynamometers
Authors: Gao Chang Yin , Li Wan Quan
Published: October 2012

In order to accomplish the static calibration of piezoelectric dynamometer, the principle and structure of a multifunctional high-precision, high rigidity static calibration platform is manufactured in this paper. The screw loading mechanisms are used to achieve vertical force and horizontal forces, and its value can directly obtained by the standard measuring ring. The torque load adopts “force × lever arm" law, that is, the two horizontal loading mechanisms are relatively shifted to form force arm, and at the same time two parallel forces that have the same magnitude and opposite directions are generated. After accuracy and rigidity experiments, the static calibration platform has reached the calibration standard stipulated by CIRP-STCC. Undoubtedly, the calibration platform can use to calibrate unidirectional force, two component force sensor, three-component piezoelectric dynamometer and the drilling dynamometer, such as sensitivity, linearity, repeatability, hysteresis and crosstalk.
Research on Sensorless Control System of BLDCM Based on TMS320F2812
Authors: Zhu Jian Guang , Jiang Kai , Zheng Hao
Published: October 2012

An electronic control system for sensorless BLDCM is proposed. Normally, the back-emf signal has coupling noise from the PWM signal which is used to vary the speed of the motor. So it is difficult to detect the zero-crossing point accurately when the motor work at low speed. In order to improve the controllability of BLDCM at low speed, a new algorithm is presented. The control system is implemented from both hardware and software parts. And the experiments verified the good control performance and dynamic characteristics of the system.
The Application of the Finite Element in the Vehicle NVH Field
Authors: Chen Hong Jiang , Wu Yue Hai
Published: October 2012

The articles establish the dynamic model of the vehicle with the finite element software, and simulate the structural modes, acoustic modes, driving the NHV performance of ride comfort, and proposed improvement program. Practice has proved that the application of finite element analysis software can simulate the vehicle NVH performance and provide fast and accurate basis to improve its performance.
Simulation of PMSM Vector Control Based on SVPWM and SVPWM Algorithm
Authors: Gui Jun , Zhang Na , Liu Li Jun
Published: October 2012

In the field of Permanent Magnet Synchronous Motor (PMSM) control, SVPWM method is one of the new techniques have been developed in recent years. This paper presented the SVPWM method, including the reference voltage projection and the space vector duration calculation. Then the simulation results also are presented.
A Study on Projective Correspondence Model of Camera Calibration in Aerial Photogrammetry
Authors: Ma Qing
Published: October 2012

A novel mathematical model of imaging on idealized optical system has been proposed based on the principle of camera imaging. The correlation between the object and image space is analyzed in the established model. The reason for projective distortion is that the inconstant amplification ratio, and is with nonlinear relationship with the tilt angle and filed of view. Concepts of positive projective and negative projective distortion are defined, and a quantitative study has been carried out. The distribution of the projective distortions is provided after analysis. The proposed model has been used to explain the measurement inaccuracy in our aerial photo topography, and to find the essential difference between 2-D projective and affine correspondences in photogrammetry. The mature projective correspondence is successfully adopted to improve our aerial test and measurement precision.
An Automatic Braking System in the Reversing Based on Electric Vacuum Booster
Authors: Lu Sheng , Yan Bin , Piao Chang Hao , Zhang Qiang
Published: October 2012

An automatic braking system based on Electric Vacuum Booster (EVB) in the reversing is proposed in the paper. The present study can not only avoid the collisions in the reversing, but also keep the vehicle in a low uniform speed. In the system, Time-of-flight (TOF) algorithm is used to measure real-time distance from vehicle to obstacle. Fuzzy-PI controller is adopted to maintain the vehicle speed by EVB. If the real-time distance is in the dangerous range, the vehicle will immediately stop. It can be one of active safety measures for vehicles in the reversing.
A Self Training Semi-Supervised Truncated Kernel Projection Machine for Link Prediction
Authors: Huang Liang , Li Rui Xuan , Wen Kun Mei , Gu Xi Wu
Published: October 2012

With the large amount of complex network data becoming available in the web, link prediction has become a popular research field of data mining. We focus on the link prediction task which can be formulated as a binary classification problem in social network. To treat this problem, a sparse semi-supervised classification algorithm called Self Training Semi-supervised Truncated Kernel Projection Machine (STKPM), based on empirical feature selection, is proposed for link prediction. Experimental results show that the proposed algorithm outperformed several outstanding learning algorithms with smaller test errors and more stability.
Research and Implementation of Brushless DC Motor Drive Controller Based on FPGA
Authors: Lei Yang Jie , Zheng Jin Kun , Yan A Qi , Cao Jian Zhong , Zhou Zuo Feng , Chen Wei Ning , Zhang Hui , Liu Guang Sen , Wang Hao , Tang Li Nao
Published: October 2012

In the paper, a design method of brushless DC motor drive controller and its pure hardware implementation on FPGA is proposed. First, we design each module of the controller, including the proportional integral (PI) speed and current PI regulator, current detection module, position and speed detection module, PWM generator and commutation control module, which focuses on a PI regulator and the current detection section. Then, the logical design structure diagrams and the timing simulation waveforms are given. Finally, the overall system circuit are implemented on FPGA which can improve system integration, stability and reliability and easier to modify and upgrade. Simulation and experiment results indicate that this controller design method is reasonable and has stable operation.
Dynamic Simulation of Shaper Guide-Bar Mechanism Based on MATLAB/SIMULINK
Authors: Xu Xiu Fen
Published: October 2012

Using the vector method of shaping the transmission mechanism undertook an analysis, established the kinematics model. Application of MATLAB/ SIMULINK simulation software has been shaper planer head displacement, velocity, acceleration motion curve. high processing precision shaper of writing for a theoretical foundation.
Study on Detection and Location of Mobile Oil Pipeline Leakage Based on Pressure Gradient Method
Authors: Song Jun Yuan , Li Shu , Wang Zhao Li , Peng Xiang Jun
Published: October 2012

In the process of monitoring mobile oil pipeline system, it is hard to detect the exact leakage point. In order to solve this problem, a method based on pressure gradient is adopted to improve the accuracy of leakage detection. In the previous researches, the fluid friction resistance coefficient is supposed to be an invariable before and after the leakage of mobile oil pipeline, but the method based on pressure gradient can overcome this limitation and improve the accuracy of locating leakage point. Furthermore, it is indicated that the method is better by comparison with relevant literatures.
Fault Detection System Overall Design for Artillery Control Device
Authors: Zhang Shi Long , Dou Ya Li , Gao Jian , Wang Jian Zhong , Yuan Hai Wei
Published: October 2012

We designed the fault detection equipment for artillery cotrol device, and the performances and faults of the three subsystems can be detected, according to their signal characteristics. In this fault detcetion system, the MCU is used as the master controller, and the A/D conversion chip MAX197 is applied to acquisit and convers data. The data will be processed by the MCU, then be transfered to LCD intelligent terminal through serial port, and finally be displayed and preserved in the terminal. This detection system can complete data acquisition and real-time fault detection, locating the faults to the specific parts. It can also provide expert maintenance proposal in the three subsystems of artillery control device. Besides, this system has great generality and practicability, and it is convenient for upgrating and reforming.
Autofocus Design for Testing System of Small Arms Sights
Authors: Yu Qiu Shui , Jia Xin Yu , Li Hai Yu , Song Xiao Hua
Published: October 2012

In order to improve the test accuracy of light weapons sights optical performance parameters, designed a set of photoelectric automatic focusing system which based on image processing, and made a detailed introduction of the automatic focusing system software and hardware systems design. Experiments have repeatedly established that this auto-focusing system has stable performance and high precision. The precision of the optical sighting performance parameter testing of small weapons are improved greatly. So this system has high practice value.
Detection Devices and Technologies on Large-Scale Pipe Weld Surface Defect
Authors: Liu Qi , Wei Yu Lan , Li Bing , Jin Meng Dan , Fan Ying Ying
Published: October 2012

The kind and extent of defect can be identified through image processing. First, the weld defect detection device should be constructed, and then the defect imaged should be obtained through rational way, in order to enhance the image quality, image filter and image enhancement method should be use. To ensure the real-time system, the weld region need to segment from the image. After that, the needed defect features need to determine and extract. Finally, the kind, the location and the size of the defect can be defined.
Study on Photoelectric Performance of Organic Light Emitting Device
Authors: Zhan Li Lin , Wang Ying Lian , Ye Jun Yao
Published: October 2012

Organic light emitting devices (OLED) with the structure of ITO/TPD(30nm) /Alq3 (40nm)/LiF/Al were prepared by vacuum thermal evaporation method. The influence of relative humidity and LiF buffer layer to the photoelectric performance of OLED was observed as well. It showed that the device had good photoelectric performance under relative humidity 40%, also had very good rectifier characteristics, the starting voltage was 12V, maximum luminous efficiency was 1.74cd/A. With the injection of LiF layer, the device electro-optical properties had marked improvement, the starting voltage dropped to 10V, brightness increased to 2450 cd/m2, maximum luminous efficiency was 2.34 cd/A.
Study on the Morphology and Mechanical Properties of Yak Fiber
Authors: Luo Qiu Lan , Gao Pu , Deng Dan , Xue Yuan
Published: October 2012

As a special animal fiber, yak hair has many excellent properties, such as soft feeling, good elasticity, gentle glossy and excellent warmth retention performance, therefore, it has very high industrial value, and can be used as high-grade raw materials in the woolen industry. In this paper, the fineness, length, curl and surface morphology of Yak fiber were analyzed, and mechanical and tensile properties with the different conditions were discussed and compared.
Fundamental Electronic Properties and Elastic Properties of Lanthanum Hexaboride: A Computer Aided Design
Authors: Yu Ben Hai , Xu Chao , Chen Dong
Published: October 2012

We have carried out first-principles calculations to study the lattice constants, elastic constants and some fundamental electronic properties of lanthanum hexaboride under different pressures. The calculated bulk modulus and lattice constant are in agreement with previous theoretical results. The elastic constants increase with applied pressure increasing. LaB6can retain its stability up to 5GPa. The valence band near Fermi energy is dominated by the La-5d band hybridized with the B-2p state, with small contributions of the La-s, p states. Our results are compared with some experiments and discussed in light of previous theoretical investigations.
Analysis for the Safety Status of Rock Mass Material in Mining Hole Using the Theoretical and Numerical Method
Authors: Xie Xiong Gang , Dai Zhang Yin , Zhang Ze Biao
Published: October 2012

The mechanical behavior of rocks is nonlinear. Most conventional calculation of stress around the mining hole is based on a linear Mohr–Coulomb failure criterion. In the past few years, there has been an increasing recognition that stress–strain relations do not remain linear, even for low stress levels, and the strength parameters of both geomaterials depend on stress levels. In recent years, many efforts have been focused on stability problems of geotechnical structures with the theoretical and numerical method. In order to further understand the stress state to predict the safety degree of mining hole, in this paper, analysis for the safety status of rock mass material in mining hole using the theoretical and numerical method are done to give guidance for the real practice.
Analysis of Alumina Ceramic Tools and their Cutting Performances
Authors: Wang Ming Hong
Published: October 2012

Alumina ceramic tools have played an important role in metal working industry as mainly applied ceramic tool materials. They have already become modern ceramic materials with better physical properties and cutting performances. The sorts and developing status of alumina ceramic tools are introduced here. The cutting performances and applications are elaborated. Furthermore, the matching issues are analyzed between alumina ceramic tool and its cutting object.
Synthesis and Adsorption Properties of Nano Al2O3/TiO2 by Hydrothermal Method
Authors: Zou Jin Feng , Chen Hai Feng , Yan Ting
Published: October 2012

Using auminum nitrate nonahydrate and titanium dioxide nanowires as the main raw material, Al2O3/TiO2 composite powers were prepared by the hydrothermal method at 200 oC for 24 hours. And the samples are characterized by XRD, nitrogen adsorption and desorption. The results show that the samples are corundum and rutile, and specific surface area is nearly 155 m2/g. Otherwise we tested samples for adsorption capacity of Congo red at different times, temperature and initial concentration under visible light irradiation. We found that it is the maximum adsorption efficiency (~107 mg/g) at the temperature of 50 oC, within one hour to reach the adsorption saturation.
Investigation of the Phase Structure of Tm2CrFe13Si3 Compound by Differential Thermal/Thermotravimetric Analyzer
Authors: Wu Yan Zhao , Liang Fei Fei , Zheng Kai Ping , Hu Huai Gu , Hao Yan Ming
Published: October 2012

The phase structure and magnetic were investigated by means of x-ray diffraction and differential thermal /thermogravimetric analyzer. The result showed that nitrogenized reaction started at 140oC with little nitrogen diffused into Tm2CrFe13Si3 compound. The nitrogen absorption of the Tm2CrFe13Si3 compound was most violent at 700oC, and its Curie temperature TC increased obviously. As the temperature increased continually, part of the Tm2CrFe13Si3 compound decomposed into TmN compound and α-Fe.
Valuation on Mildew-Proof Results of ACQ-B to Bamboo
Authors: Han Jian , Luo Dan
Published: October 2012

In order to increased mildew-proof capability of bamboo, ACQ-B was taken as mildew preventive, and the concentration and temperature of ACQ-B, the pressure and forcing time as the test factors. The relationship between the technical factor and the moulding of bamboo was researched through the orthogonal test. The results showed that the more the weight of bamboo increased, i.e., the more ACQ-B permeating into bamboo was, the better the mildew-proof capability of the bamboo was. Through the analysis and comparing to the test results, that the concentration of ACQ-B was 0.4%, the forcing time was15h, the temperature of ACQ-B was 65°C, and the pressure was 0.24MPa was the best technical condition when bamboo was treated with ACQ-B.
Anomalous Thermal Expansion and Spontaneous Magnetostriction of Gd2Fe16.5Cr0.5 Compound
Authors: Gao Chun Jing , Hao Yan Ming , Liang Fei Fei , Hu Huai Gu
Published: October 2012

The thermal expansion and magnetic properties of Gd2Fe16.5Cr0.5compound have been investigated by means of X-ray diffraction and magnetization measurements. The Gd2Fe16.5Cr0.5compound has a rhombohedral Th2Zn17-type structure. The Curie temperature of Gd2Fe16.5Cr0.5compound is about 560K. This value is about 50K higher than that value of the mother compound Gd2Fe17. A small average thermal expansion coefficient, = 1.65×10-6/K, and a negative average thermal expansion coefficient, = -1.46×10-5/K, were found in Gd2Fe16.5Cr0.5compound by X-ray diffraction in the temperature range 294 - 514K, and 514-613K, respectively. There exists anisotropic strong spontaneous magnetostriction in the magnetic state of Gd2Fe16.5Cr0.5compound.
The Preparation Technology of the Compound Coating of Cu-Ti-B on Aluminum Alloy Spot Welding Electrode Surface
Authors: Zhou Hui Lin , Yu Hui Yong , Liu Dan , Hu Jun Hua
Published: October 2012

This study explored the preparation technology of the use of compound materials as aluminum alloy spot welding electrode surface coating, in order to improve the electrode surface temperature strength and reduce electrode wear. The test results show that compound electrode coating of Cu-Ti-B is synthesized in situ at the Zr-Cr-Cu electrode surface by the resistance heat and pressure while spot welding. Structure and component analysis shows that it contains TiB2 strips and grains with good heat resistance, which can intensify the strength of coating base and reduce the plastic deformation generated in part of the electrode surface by blasting right after the electrification. So it is feasible to prolong the electrode life of aluminum alloy spot welding.
Effect of High-Pressure Solution Temperature on Corrosion Resistance of AM60 Magnesium Alloy
Authors: Chen Guang Hui
Published: October 2012

As-cast AM60 magnesium alloy was solid dissolved under a high-pressure of 4 Gpa at different temperatures. The microstructure of the products was observed by optical microscope and the corrosion resistance of the products was investigated. The results show that increasing temperature during solution treatment promotes the dissolution into α-Mg matrix of β-Mg17Al12 in the alloy and improves the corrosion resistance of AM60 alloy, especially for over 400 °C.
Preparation and Properties of the Underwater Curing Epoxy Adhesives*
Authors: Xie Jian Jun , Huang Kai , Yao Qing Xin , Ding Chu
Published: October 2012

The epoxy adhesive is prepared according to the optimal formula of the orthogonal experiment, and its curing properties, the dynamic mechanic parameters, Fourier transform infrared spectrometer(FTIR) and the thermogravimetric analysis(TGA) are measured. And its shear adhesive strength is about 22.0MPa, its tensile strength is about 12.50MPa and its charpy impact strength is 9.41kJ/m2. The result of TGA and dynamic mechanic analysis(DMA) test have shown that the thermal stability of the epoxy adhesive is good before 335°C and its weight retention ratio is more than 90% and Tg≈50°C. By exploring the experiments, the tensile adhesive strength of the dumbbell sample in the concrete for the underwater curing epoxy adhesives is more than 2.26~2.98MPa. Epoxy resins have many excellent properties of mechanics and adhesion. By suitable modification of the epoxy resins, they have widely been applied for the leakage proofing in the underground and the submarine tunnel; the repairing and reinforcing of the dikes, dams and bridges; the repairing of the mechanical, electrical and chemical equipments[1]. Since1960’s, the underwater curing epoxy adhesives are developed and a great many works are done[2-10], for example, α-cyanoacrylate adhesive, the organosilicone adhesive, the urethane adhesive. But the open literatures abroad are few[11]. Zhang et al[12] investigated systematically the viscosity, reavtivity, mechanic and adhesive properties of the underwater curing epoxy adhesives for different curing agent systems, However, these studies concentrate on the laboratory results on the sheet steel piece, and the experimental testes on the damp and underwater concrete samples have not been seen up to now. This paper tried to explore the experiments on the damp and underwater concrete samples and obtained some good results based on the laboratory development on the sheet steel pieces.
Numerical Simulation of Frictional Dissipation in the Dislocated Single Floating Ring Bearing
Authors: Wang Xue Hui , Dai Yu Jie , Hao Jiu Qing
Published: October 2012

The frictional dissipation in the dislocated single floating ring bearing is simulated by boundary element method (BEM). The advantage of BEM is that it can reduce the numerical simulation error and increase the numerical efficiency. The numerical results indicate that the total frictional dissipation decreases with the increases of the floating ring’s velocity and never change when the radius of the floating ring Rf=0.4. The evolution of total frictional dissipation is similar with the bearing’s frictional dissipation.
Numerical Simulation and Prediction of Cutting Force in Turning of Titanium Alloy
Authors: Li Bin , Wang Hong
Published: October 2012

Though titanium alloys are being increasingly sought in a wide variety of engineering and biomedical applications, their manufacturability, especially machining and grinding imposes lot of constraints. With the development of engineering technology, FEM can be used to simulate metal machining process and gain better understanding of material flow within dies, so as to optimize tooling to eliminate tears, laps and other forging defects. In this paper, numerical simulation was conducted by using FEM software on the whole cutting process for TC4 alloy mounting parts in an effort to investigate the metal flow behavior. The calculated cutting force increases approximately logarithmically with the cutting speed, as should be expected from the logarithmic rate dependence.
Study of Detecting Defect System for the Images of Medical Aluminum-Plastic Cap
Authors: Shan Gen Li , Huang Peng Hui , Zhou Yun Guang
Published: October 2012

This paper introduces the current situation of the development of medical aluminum- plastic caps and the importance of developing a set of recognizing system to measure their defects. For the defects on the inner side of the cap, a kind of identification method by extracting the image characteristic values is put forward, which include Area, Compact degree and six moment invariant parameters. Comparing the values of the caps to be detected with those of qualified ones, we then use the removing device to remove the failed caps.
Control of Machining Process for Titanium Alloy Based on Green Cooling and Lubricating Technology
Authors: Zhang Yue , Han Li , Zhang You Jun , Zhang Xi Chuan
Published: October 2012

The machining process of titanium alloys always need special control by using coolant and lubricant as it is one of the difficult-to-cut materials. The cutting experiments are carried out based on green cooling and lubricating technology. To achieve green cutting of titanium alloy Ti-6Al-4V with water vapor cooling and lubricating, a minitype generator is developed. Compared to dry and wet cutting, the using of water vapor decreases the cutting force and the cutting temperature respectively; enhances the machined surface. And it can help to chip forming and breaking. Water vapor application also improves Ti-6Al-4V machinability. The excellent cooling and lubricating action of water vapor could be summarized that water molecule has polarity, small diameter and high speed, can be easily and rapidly to proceed adsorption in the cutting zone. The results indicate that the using of water vapor has the potential to attain the green cutting of titanium alloy.
Study on the Fatigue Life of Fully-Automatic Hydraulic Press Pull Rods Based on Finite Element and Mechanical Materials
Authors: Huang Zhi Cheng , Zhang Bai Qing , Xu Han , Han Wen
Published: October 2012

Fully-automatic hydraulic press is one of the key mechanical equipments of ceramic wall and floor tiles production line. The four pull rods of the frame withstand the all work force when it works, so took a type of fully-automatic hydraulic press as the object of study, established the 3D model of its pull rods by CAD software Pro-E, and then import them into finite element analysis software to analysis the value and distribution of the stress and strain, finnly studied the fatigue life of the pull rods according to the finite element static analysis result and the S-N curve of the pull rods material by using ANSYS fatigue analysis module. The methods and conclusions have practical significance to understand the hydraulic press structure and improve on the structure design and life assessment of the fully-automatic hydraulic press beam.
Stall Analysis of the Compressor Based on Discrete Wavelet
Authors: Xu Jiang Tao , Guo Rui Xia
Published: October 2012

This paper, based on the discrete wavelet thoughts, using the pressure fluctuations signal of the engine compressor, effectively remove high frequency interference, and keep useful information to signal. According to the different position of different states of the signal pressure pulsation multi-resolution analysis, reconstruction of the relevant frequency band pressure component signals, thus judgment that whether compressor enters a stall, the conventional only through the stall of engine after expressed by changes to the method of performance criterion.
A Gradient-Prediction Algorithm for Computing One Dimensional Stable and Unstable Manifolds of Maps
Authors: Jia Meng , Ru Yi , Xi Jun Jie , Ji Qing Hua , Wu Zhong
Published: October 2012

A new algorithm is presented to compute both one dimensional stable and unstable manifolds of planar maps. The global manifold is grown from a local manifold and one point is added each step. It is proved that the gradient of the global manifold can be predicted by the known points on the manifold with a gradient prediction scheme and it can be used to locate the image or preimage of the new point quickly. A new accuracy criterion is derived from the gradient prediction scheme. The performance of the algorithm is tested with several well-known examples.
A Research on the Power Match of Generator System of Special Vehicle
Authors: Zhu Shi Shun , Luo Su Jun , Xiao Hui , Yang Gang
Published: October 2012

Aimed at the problem of power supply protection on vehicles as the special project platform, making use of the surplus reserve power of vehicles and installing moving shaft generator system is introduced. Dynamics model of vehicle with shaft generator system is established, the impact of shaft generator system to the vehicle is analyzed, and compared with the dynamics of prototype vehicle, the dynamics matching method of vehicle with moving shaft generator system is obtained.
The Research on Automatic Recognition of Assembly Feature and Converse Parametric Design Method Based on UG
Authors: Fang Bin , Tian Liang
Published: October 2012

No matter the bottom-up design mode is adopted or the top-down design is chosen, one-to-one dimension relation can be realized alone among assembly-components in three-dimensional CAD systems.In the paper, a method of automatic recognition is put forward based on assembly features in UG and various definitions as well as expressional methods of assembly features are analyzed. The interrelated dimension relation is established on account of the fit dimension chain. The converse parametric design is realized besides an independent module in UG is developed to achieve the function.
Fault Prediction Method Research of the Power Plant Fan
Authors: Sun Jian Ping , Gao Ming , Li Ya Lun
Published: October 2012

To solve the problem of the power plant fan fault prediction, proposed that combining with neural network method and nonparametric density function estimation methods based on parzen window the estimation to achieve fault detection. To improve the prediction performance of neural network, used PSO method, which can realize weights optimization of the neural network prediction, avoid falling into local optimum. Using sliding time window achieve the multi-step prediction of the neural network, and ensure the prediction accuracy. Then, fault is predicted by prediction residuals through density function estimation and hypothesis test. Finally, by using the vibration fault prediction of the air feeder of a power plant in Shanxi as research object to test this method, the simulation result illustrate this fault prediction algorithm can predict the fault of fan timely and effectively.
Comparative Investigations of the Sandfish’s β-Keratin (Reptilia: Scincidae: Scincus scincus). Part 1: Surface and Molecular Examinations
Authors: Staudt Konrad , Saxe Friederike Petra Maria , Schmied Heiko , Soeur Raphael , Böhme Wolfgang , Baumgartner Werner
Published: October 2012

The Sandfish (Scincidae: Scincus Scincus) Is a Lizard Capable of Moving through Desert Sand in a Swimming-Like Fashion. the Epidermis of this Lizard Shows a High Resistance against Abrasion Together with a Low Friction to Sand as an Adaption to a Subterranean Life below the Desert’s Surface, Outperforming even Steel. the Low Friction Is Mainly Caused by Chemical Composition of the Scales, which Consist of Glycosylated β-Keratins. in this Study, the Friction, the Micro-Structure, the Glycosylation of the β-Keratin Proteins and β-Keratin Coding DNA of the Sandfish in Comparison to other Reptilian Species Was Investigated, Mainly with the Closely Related Berber Skink (Scincidae: Eumeces Schneideri) and another Sand Swimming Species, the Not Closer Related Shovel-Snouted Lizard (Lacertidae: Meroles Anchietae). Glycosylated β-Keratins of the Sandfish, Visualized with Different Lectins Resulted in O-Linked Glycans through PNA Employed as Carbohydrate Marker. Furthermore, the Glycosylation of β-Keratins in Various Squamatean Species Was Investigated and All Species Tested Were Found Positive; however, it Seems Like both Sand Swimming Species Examined Have a much Stronger Glycosylation of their β-Keratins. in Order to Prove this Finding through a Genetic Foundation, DNA of a β-Keratin Coding Gene of the Sandfish Was Sequenced and Compared with a Homologue Gene of Eumeces Schneideri. by Comparison of the Protein Sequence, a Higher Abundance of O-Glycosylation Sites Was Found in the Sandfish (enabled through the Amino Acids Serine and Threonine), Giving Molecular Support for a Higher Glycosylation of the β-Keratins in this Species.
Kinematics Analysis of Foot Metatarsals Skeletal Rays through Inverse Modelling
Authors: Hao Q. , Shen W.W. , Ma J.B. , Li J.S. , Ren X.J. , Gu Y.D.
Published: October 2012

The Purpose of this Study Is to Establish Models of the First to the Fifth Ray of the Skeletal Plantar Arch and to Analyse the Model Application in Kinematics. Foot Models Are Built through CT Scan, then Inverse Model Recreation. we Calculated the Metatarsal Angles and Horizontal Metatarsal Angles Using Motion Analysis System. the First to the Fifth Metatarsal Angle and Horizontal Metatarsal Angle Are both Different. the same Trend Happened in the Lateral and Medial Metatarsal Angles. these Results, Especially the Middle Part Angle Relationship Can Be Further Used for Analysis of Foot Mechanics during Walking or other Activities.