bluuebunny/crossref_metadata_2025 huggingface dataset:
Effect of Anodic Films on Galvanic Corrosion Behavior of TC4 Titanium Alloy and LY12 Aluminum Alloy
Authors: Wu Zhi Yong , Li Xue Yuan , Zhao Li Ning , Hu Su Rong
Published: August 2014

Galvanic corrosion behavior of TC4 titanium alloy coupled LY12 aluminum alloy was investigated in 3.5% NaCl solution. Particular attention was given to the effect of three different oxidation films. Galvanic corrosion test was conducted on TC4 titanium alloy which coupled LY12-sulfuric acid anodic film (LY12/A(S)), LY12-chromic acid anodic film (LY12/A(Cr)), LY12-hard anodic film (LY12/A(S) hd) and bare LY12, respectively. Galvanic corrosion current (Ig) and average galvanic current density (Ig’) were monitored. Corrosion morphology was observed by camera and corrosion mechanism was discussed. The results show that the three anodic films improve the corrosion resistance of the anode in different magnitudes. LY12/A(S) hd is found to be least susceptible to galvanic corrosion when coupled TC4 titanium alloy. LY12/A(S) and LY12/A(Cr) are found to be moderately susceptible to galvanic corrosion. But the bare LY12 is highly susceptible to galvanic corrosion in corrosive environment.
Advances in Test Methods for Poisson’s Ratio of Solid Propellant
Authors: Zhang Xiao , Zheng Jian , Peng Wei , Gu Zhi Xu
Published: August 2014

This paper reviews domestic and foreign study result of the calculation method and variation of solid propellant and other viscoelastic material ratio of solid propellant, the viscoelastic material's Poisson's ratio as well as Poisson's ratio's influence on the structure performance of solid propellant.
Design of Steam-Heated Drying Line
Authors: Wang Li Hua , Wu Xiao Qiang
Published: August 2014

This paper describes the working principle of the steam in the drying process,the structure of the steam heating system and the drainage system composition. Meantime the function and role of each component are described and studied how to build an efficient performance of the steam heating drying line.
Equipment and Technology Research of Ballast Water Treatments
Authors: Wang Jun
Published: August 2014

Biological invasions caused by Ballast water is always one of the diffcult problems of marine environmental protection, and the technology of ballast water treatment is an effective way to solve biological invasion. This article introduce many equipments of ballast water treatment, introduce physical ballast water treatment, chemical treatment and comprehensive treatment, then describes the advantages and disadvantages of these metheods.
Experiment Research on Effect of Moving Flat Speed on Carding Force in Carding Machine
Authors: Zhao Ye Ping , Sun Peng Zi , Han Xian Guo
Published: August 2014

In order to research the influence of moving flat speed on carding force between cylinder and flat, the carding force test was carried out under the condition of seven level speeds of the flat with a specially developed dynamometer. Experimental results show that the flat speed has an obvious effect on the carding force, which on the first to tenth flats have been more influenced. The carding force increases as the flat speed rises. When the flat speed is 650 mm/min, the carding force is the largest. Raising the flat speed is equivalent to reducing load on the flat clothing surface. Therefore, average carding force increase on single fiber explains the basic reason that incremental flat speed results in the carding force raising. Cotton fibre carding process has been basically completed between the 14th and 20th flats.
Optimal Design of Working Face Ventilating System of Huoerxinhe Company
Authors: Yang Li Ping , Qiao Wei , Zhou Hou Quan
Published: August 2014

In order to guarantee the safe and efficient production of coal mine of Huoerxinhe Company, for the problems of gas exceeding limitation, excavating replacement tension, resource waste air leaking and so on, the ventilation mode was optimized and Y type ventilation mode was adopted. Practices indicate that this ventilation mode is entirely feasible on working face of Huoerxinhe Company. Through this mode, we can (1) decrease the tunneling engineering quantity, improve the excavating replacement tension of double U type mode; (2) reduce the protective coal pillars to cut down resource waste; (3) solve the problem of gas exceeding limitation on upper corner thoroughly.
Effect of TGA Concentration on Morphology of Cu2S Nanoparticals
Authors: Ma Guan Xiang , Hu Jun Qing , Kotov Nicholas A.
Published: August 2014

Copper chalcogenide nanoparticles (NPs) represent a promising material for solar energy conversion and electrical charge storage. We showed that aqueous synthesis of high quality monodispersed high-chalcocite Cu2S NPs is possible. Here, different thioglycolic acid (TGA) concentrations were employed in studies made to investigate the effects of stabilities ratio on particle morphology. It was found that the stabilizes concentration plays a key role in the synthesis of Cu2S NPs, the reaction rate is fast at low concentrations of TGA, and the size range is lager, while flower-like cluster with sizes of 30 nm were formed at high concentrations of TGA. Rapid availability of our results will provide valuable insight into the controlled growth of aqueous dispersions of ternary copper chalcogenide NPs, stimulating further studies of these materials in green energy conversion technologies and drug delivery applications.
The Development of a Highly Integrated Secondary Instrument
Authors: Pan Hao , Ma Qiu Fang
Published: August 2014

In order to simplify the design of secondary instrument, a highly integrated scheme based on MSP430F169 was put forward in the paper. On analysis of the functional requirement for process parameter measurement and control systems, signal conditioning circuits to deal with the thermal resistance, thermocouple, current and pulse input or output was designed to meet the demand of different field. The MCU on-chip resources were used in the design as far as possible. It mainly includes the use of A/D and pulse counter to acquire signal, D/A to output current and UART to construct communication. Furthermore the clock and EEPROM storage systems were designed to enlarge the universal property. Tests show that the platform can meet the hardware demand of the mainstream secondary instrument, and is with high performance cost ratio.
Tri-Linear Regulation of Diffusion Tensor Field for WM Fiber Tracking
Authors: Wu Zhan Xiong , Li Xun
Published: August 2014

In this paper we present a method for regulating diffusion tensor magnetic resonance (DT-MRI) data. The method is divided in two steps. First, decomposed diffusion tensor and found out the tensors whose eigenvalue was non-positive. The second step was to apply tri-linear interpolation to regularize the diffusion tensor field. We show that the process is a convenient framework to regulate DT-MR data. Both steps are illustrated on real diffusion tensor magnetic resonance data.
Research on Risk Generation Mechanism of China’s Alternative Fuel Vehicle Industry
Authors: Lin Jin Feng
Published: August 2014

Alternative fuel vehicle industry, as one of China’s strategic emerging industries, its development process will be faced with many risks, researching the generation mechanism of risk has important theoretical and practical significance. This paper, in reference to relevant researches, put forward a kind of FIR analysis model (Factor-Interaction-Risk Model) for analysis the risk generation mechanism of China’s alternative fuel vehicle industry, the method solve the earlier risk generation mechanism studies’ drawbacks being lack of dynamic analysis, the relations among the factors hard to understand and obscure.
A Product-Level Rapid Modeling Method for Mesh Reflector Antenna
Authors: Zhang Zhi Hua , Li Shen , Li Peng
Published: August 2014

To solve the low design efficiency problem of complex product, a product-level rapid modeling method is proposed. Parametric template library is created firstly. Then a hierarchical product assembly model is constructed by the top-down variable design. Lastly product model is generated automatically by using the technologies of position constraints and semantic mapping. The method has been applied to a self-developed modeling system for mesh reflector antennas (MRA). The results show that it can generate the product model rapidly, improve the design efficiency greatly, and provide the model data support for the follow-up analysis, optimization and adjustment process.
An Islanding Detection Method for Photovoltaic Power Generation System Using Fluctuation Characteristic of PCC Harmonic Voltage
Authors: Yun Luo
Published: August 2014

In the photovoltaic power generation system, the harmonic voltage of the point of common coupling (PCC) is determined by system disturbance, local load and photovoltaic power generation system itself together. Based on the fluctuations of this harmonic voltage, a new islanding detection method for the PV system is proposed. By extracting the higher harmonic components from the wavelet transformation of point of common coupling (PCC) voltage, and then taking its fluctuations as the islanding identification and detection index, non-detection zone (NDZ) can be eliminated, without a plus disturbance. According to IEEE Std.1547, simulated verification of the proposed method is accomplished in the ideal photovoltaic grid system. When the PCC voltage and frequency are within the normal range, it can not only give a fast and accurate detection to the occurrence of islanding, but also identify the false islanding, such as voltage dips and switching loads, effectively avoiding false detection caused by the false islanding.
Analysis of Design Parameter Sensitivity of On-Off Shift Solenoid Valve
Authors: Huang Fei , Wang Chun Yang , Sun Yu Bo
Published: August 2014

The parameters of the On-off shift solenoid valve are analyzed by finite element analysis software Ansoft and orthogonal experiment design. What’s more, the design parameters of the on-off shift solenoid valve can be optimized by analysis of the data of the orthogonal table. The result shows that the voltage influences the electromagnetic force the most, the air gap comes second and the number of turns is the minimum. We find that the force increases with the growth of voltage and the number of turns, but it is opposite to the air gap.
Direct Torque Control for Permanent Magnet Synchronous Motors Based on Fuzzy Regulator
Authors: Tang Xiang , Gu Jun , Qin Ting Gao
Published: August 2014

In this paper, a method of direct torque control (DTC) for permanent magnet synchronous motor (PMSM) based on fuzzy regulator is proposed. It overcomes the disadvantages such as speed drop with load, torque ripple etc., which happens in the DTC for PMSM based on conventional PI regulator. The simulation results show that, the DTC for PMSM based on fuzzy regulator can effectively improve the system loading capability and significantly reduce the torque ripple and the harmonic content of the system. Therefore, it can comprehensively improve the system performance.
Millimeter-Wave Reduced-Size Wilkinson Power Divider
Authors: Qiu Yu Feng
Published: August 2014

The letter reports the analysis of the reduced-size planar microstrip Wilkinson power divider which uses miniaturized microstrip line instead of conventional quarter wavelength transmission line. The full design formulae of the miniaturized Wilkinson power divider with arbitrary power ratio is first proposed.3dB one-stage and two-stage miniaturized Wilkinson power divider are designed according to the formulae. The ADS EM simulation results of the one-stage miniaturized Wilkinson power divider when the smaller electrical angle is 45 degrees show its reflection coefficient<-20dB,isolation>20dB and the transmission loss<0.4dB in the bandwidth of 28.9-34.9GHz,for the two-stage reduced-size Wilkinson power divider its reflection coefficient <-20dB,isolation>20dB and the transmission loss<0.4dB in the bandwidth of 26-37.5GHz.This kind of miniaturized Wilkinson power divider has a very compact size as well as good match and isolation.
In Situ Self-Assembled Graphene-Polyaniline Nanocomposite Thin Films for Ammonia Gas Sensor
Authors: Guo Ning Jie , Tai Hui Ling , Ye Zong Biao , Xie Guang Zhong
Published: August 2014

In this paper, the graphene-polyaniline (PANI) nanocomposite thin film was prepared by the in situ self-assembly method for the ammonia (NH3) gas sensor application, which was characterized by scanning electron microscopy (SEM) and UV-vis spectroscopy. The NH3 sensing performance and mechanism of the nanocomposite film were investigated. The results revealed that the sensor based on graphene-polyaniline nanocomposite film exhibited better sensing properties and restorability than those of single graphene film.
Secondary Cooling Control of Continuous Casting Process with Model Strategy
Authors: Zhang Jin Hong , Jia Jun Li , Wang Guo Zhen
Published: August 2014

In the continuous casting production casting speed and casting temperature fluctuates frequently, the secondary cooling control of slab surface temperature fluctuation is too big problem, proposes a radical.The utility of the pulling speed cascade water distribution control method, a kind of development.secondary cooling control model for slab continuous casting.
The Application of Piezoelectric Actuator for Small Aircraft
Authors: Zhang Xing , Wang Wei , Zong Guang Hua
Published: August 2014

This paper describes the design, construction, and analysis of a new piezoelectric actuator design for small aircrafts in the special requirements of the steering weight. It describes the working principle of piezo actuator, optimizes the piezo chip specification parameters by experimental measurements, put forward the finite element analysis simulation and the experimental testing of piezoelectric actuators’ drive performance. The simulation and experimental results show that the new design meets the design requirements of weight and space control.
The Design of Wireless Sensor Network Node Based on TinyOS
Authors: Li Hong Kun , Huang Jun
Published: August 2014

In order to solve the low power issues of wireless sensor networks, this paper designs a wireless sensor network node embedded operating system based on TinyOS. This paper Briefly introduces on the basis of TinyOS, gives the hardware structure diagram and the hardware connection between the low power MCU MSP430 and RF transceiver chip CC2420. what’s more, the design process of system and the program flow diagram are given. The node can be effectively applied in the power requirements where the requirement of wireless communication power is relatively strict.
Vision-Based Vehicle Detection in Real Traffic Environment Using Fast Wavelet Transform and Kalman Filter
Authors: Zhuo Fu Qing , Lin Pei Qun , Gu Yu Mu
Published: August 2014

A new vision-based approach for robust vehicle detection is addressed in this study. First, fast wavelet transform (FWT) is proposed to extract image texture, while grey level co-occurrence matrix (GLCM) is employed to measure and analyze the extracted texture. Then, vehicles can be extracted because the vehicle sections and the shadow sections have different textures in the foreground image. Moreover, we put forward the state and observation matrixes of Kalman filter which can be used to track vehicles under complicated traffic scenes. Experimental results in real traffic scenes show that the proposed methods are effective and efficient.
The Design and Realization of Real-Time Video Transmission System Using in Tracked Robot
Authors: Wang Kai , Zhang Yi Wen , Hu Ji Wen
Published: August 2014

In order to solve the poor quality of video transmission system on the platform for tracked robot motion, we have designed a video transmission system of tracked robot motion platform adopting a streaming media SDK of DirectShow and the real-time transmission protocol of RTP, and we also analyzed and improved the communication quality of the system. The experimental results show that the new design has greatly advantage in reducing the packet loss ratio and time delay phenomenon, and enhance the quality of the video transmission. The conclusion of the research has a great significance in promoting the accuracy and timeliness in the semi-autonomous control of tracked robot under complicated environment.
Study on Numerical Simulation of Shrapnel Fragments at the Components Damage Effect on Armored Vehicle Concept
Authors: Wu Xiao Ying , Li Fan
Published: August 2014

we studies the grenade fragment to view damage effect of aiming an armored vehicle parts (fragment size, shape, fragment velocity) with the finite element method,The damage processs of grenade fragments of armored vehicle concept aiming component is simulated by the AUTODYN software. Through the analysis of the results of numerical simulation,weobtained parameters values at the damage assessment components (attenuation penetration depth, diameter and velocity degree) and grenade fragment to the gunner aimed at the damage rule, mirrorand lay the foundation for the fragment of the armored equipment parts damage assessment.
A Theme-Oriented Data Automatic Organization Method
Authors: Cao Rui , Hao Li Yun , Wu Ling Da
Published: August 2014

In order to automatic organization data according to customers’ requirement, and improve the data reusability, an idea of data meta-component is proposed, the definition of data meta-component is present, the model of data meta-component is established. A theme-oriented data automatic organization method is proposed; on the basis of data mete-component, the theme domain data automatic organization is realized by means of nature language processing, semantic query, association analysis, share distribution, and other technologies; experimental results show that this method is feasible and effective.
A Cooperative Dual-Camera System for Face Recognition and Video Monitoring
Authors: Chen Zhuo , Wu Hai Bo , Xia Sheng Ping
Published: August 2014

In the ordinary video monitoring system, the whole small scene is usually observed by a stationary camera or a few stationary cameras, but the system can’t zoom and focus on the target of interest rapidly, and also can’t get the high resolution image of the target of interest in a far distance. Therefore based on the research of the dual-camera cooperation and a RSOM clustering tree and CSHG algorithm, a cooperative dual-camera system is designed to track and recognize a face quickly in a large-scale and far-distance scene in this paper, which is made up of a Stationary Wide Field of View (SWFV) camera and a Pan-Tilt-Zoom (PTZ) camera. In the meanwhile, the algorithm can ensure the real-time requirement.
Photooxidation Activity of Mixed Phase TiO2 Nanoparticles
Authors: Wei Jing , Yan Liang Guo , Li Hang , Zhao Yi Yi
Published: August 2014

The different mixing ratios of TiO2 nanoparticles were synthesized using sol–gel process by changing the temperature of calcinations. The crystal structures were characterized by X-ray diffraction (XRD). The photocatalytic action of TiO2 nanoparticles was investigated through the photooxidation of Rhodamine B in aqueous solution. The XRD results indicated that the rutile ratios of different calcination temperatures (500°C, 600°C, 700°C and 800°C, respectively) TiO2 nanoparticles were 0%, 20.87%, 92.41% and 100%, respectively. The TiO2 nanoparticles which calcinated at 600 °C had the highest photocatalytic action; under UV irradiation of 4 h, initial Rhodamine B concentration of 15 mg/L, TiO2 nanoparticles (calcinated at 600 °C) dosage of 1g/L, the degradation rate of Rhodamine B could achieve to 97.87%. The addition of rutile to anatase could particularly improve the photooxidation activity of TiO2 nanoparticles.
An Improved Method for Wild-Angle Image Correction
Authors: Jiang Kun , Zhang Hua , Zhou Wen Hui , Yao Wei Zhong
Published: August 2014

Images taken by wide-angle cameras tend to have severe distortions which pull points towards the optical center. Matlab calibration toolbox is widely used in computer vision for its simplicity and strong interactivity; however it cannot accurately extract corners from wide-angle image, and be unable to correct image automatically. This paper proposes an improved wide-angle image correction method which can obtain corners precisely and implement correction automatically. The experimental results demonstrate this method not only improves the accuracy of corner extracting, but also makes the wide-angle image correction automated.
An Improved Moving Body Detection Method Based on Gaussian Mixture Model and Differencing
Authors: Zhang Wen Zhao , Wu Wei , Shen Xian Geng
Published: August 2014

This paper presented a detecting algorithm based on improved Gaussian mixture model, which improved the speed of establishing and updating the model. Whilst, according to the detection requirements in different time periods, using the method of combining temporal differencing and background differencing to detect moving body improved the instantaneity and veracity of moving body detection.
Empirical Mode Decomposition on Geometry Signal Based Spherical Parameterization
Authors: Wang Jian Guo , E Qun , Yao Ke Ming , Wan Xin Long
Published: August 2014

A novel method based onEmpirical Mode Decomposition(EMD) is approached to process the geometry signal. The main idea is to decompose the signal into some different detail components called Intrinsic Mode Function (IMF). The key steps are as follows: First, the signal is spherical parameterization; Second it is transformed into the plane signal and sampled regularly; Third, the translated signal is processed as an image using Bid-Empirical Mode Decomposition, getting several image IMFs; Finally, invert mapping these IMFs to geometry signal and getting the geometry signal’s IMFs.We demonstrate the power of the algorithms through a number of application examples including de-noising and enhancement.
Estimation of Crowd Density Based on Adaptive LBP
Authors: Li Yue , Zou Tao , Chen Peng
Published: August 2014

In recent years, mass incidents occurred frequently. In order to identify and warn the incidents proactively and timely. To this problem, we propose an algorithm based on adaptive LBP to estimate the crowd density. Firstly, use three-dimensional Hessian matrix to detect characteristic point. Secondly, use improved adaptive LBP to extract the dynamic texture and analyze it, then get the local feature. Thirdly, learn for global characteristic vectors, and then estimate the density level with support vector machine (SVM). Through simulation comparison, the density estimation method is more accurate and more real-time.
Fuzzy C-Means Clustering Algorithm Based on Coefficient of Variation
Authors: Wang Zhen Bo , Qiu Bao Zhi
Published: August 2014

To reduce the impact of irrelevant attributes on clustering results, and improve the importance of relevant attributes to clustering, this paper proposes fuzzy C-means clustering algorithm based on coefficient of variation (CV-FCM). In the algorithm, coefficient of variation is used to weigh attributes so as to assign different weights to each attribute in the data set, and the magnitude of weight is used to express the importance of different attributes to clusters. In addition, for the characteristic of fuzzy C-means clustering algorithm that it is susceptible to initial cluster center value, the method for the selection of initial cluster center based on maximum distance is introduced on the basis of weighted coefficient of variation. The result of the experiment based on real data sets shows that this algorithm can select cluster center effectively, with the clustering result superior to general fuzzy C-means clustering algorithms.
Multi-View Face Detection Based on Multi-Features AdaBoost Collaborative Learning Algorithm
Authors: Huang Rong Bing , Zhang Hong , Shu Chang Ming
Published: August 2014

In View of the Multi-View Face Detection Problem under Complex Background, an Improved Face Detection Method Based on Multi-Features Boosting Collaborative Learning Algorithm Integrating Local Binary Pattern (LBP) is Presented. Firstly, Facial Skin Color Information is Used to Exclude most of the Background Regions. then, Haar-like Feature and LBP Feature are Extracted from Facial Candidate Regions and Inputted into a Modified Adaboost Algorithm to Obtain a Strong Classifier. Lastly, in Order to Improve the Detection Speed, Pyramid Classifier System Structure is Adopted to Determine the Face. the Experimental Results on CMU Standard Test Set and Life Photos, the Proposed Method has Achieved the Rapid Detection of Multi-View Face Image.
Study on Otsu Threshold Method for Image Segmentation Based on Genetic Algorithm
Authors: Xu Zhi Bo , Chen Pei Jiang , Yan Shi Li , Wang Tai Hua
Published: August 2014

Threshold segmentation method was widely applied in image process and the selection of threshold affected the final results of image segmentation to a large extent. In order to improve the accuracy and the calculation speed of image segmentation, an Otsu threshold segmentation method based on genetic algorithm was offered. According to the threshold and the gray scale values of pixels, the pixels were divided into two categories, and then the genetic algorithm was used to find the maximum variance between clusters and obtain the optimal threshold of segmentation image. The experimental results show that this method can be used to segment the image effectively, which make the basis for image processing and analysis in the next step.
Study on the Image Segmentation Algorithm with Depth Data of Kinect
Authors: Li Lu Yi , Ye Jun Yong
Published: August 2014

In the segmentation algorithms of the depth image, because the object and its support surface are continuous in the depth data ,the traditional method of edge detection methods can’t detect the edge between the object and its support surface. To solve this problem, the segmentation algorithm of the depth image is studied in this paper. Firstly, we use canny operator to detect the edge the of depth image of the scene. Then the depth image of the scene is transformed into points of a 3-D space coordinate and normal vector is calculated for each point. The method of calculation the direction of the normal vector is used to determine the point of which belongs to the support surface area, which determine the support surface area of the scene. Finally, we detect image edge of the image that the support surface area is extracted, and fuse the result of canny operator edge detection and edge of the image that the support surface area is extracted. Experiments show that the segmentation algorithm works well, which the problem of detection the edge between the support surface area and the object and can also achieve a good depth image segmentation.
Synthesis and Self-Assembly Study of Biodegradable Amphiphilic Triblock Copolymers with PEG Block
Authors: Du Xu , Wang Qin , Wang Chuan Dong , Liu Yang
Published: August 2014

Three biodegradable amphiphilic triblock copolymers: polylactide-poly (ethylene glycol)-polylactide (PLA-PEG-PLA), poly (ε-caprolactone)-poly (ethylene glycol)-poly (ε-caprolactone) (PCL-PEG-PCL) and poly (lactide-glycolide)-poly (ethylene glycol)-poly (lactide-glycolide) (PLGA-PEG-PLGA) were synthesized. Their chemical structures were characterized. In aqueous solution, their self-assembly and degradation were studied by dynamic light scattering (DLS) and transmission electron microscopy (TEM). Spherical micelles were formed in aqueous solution via self-assembly of the amphiphilic triblock copolymers. After degradation, the PLA-PEG-PLA and PCL-PEG-PCL micelles became smaller and the PLGA-PEG-PLGA micelles change to vesicles, which should mainly attribute to their different degradation speed.
A Subdividing of Local Fractional Integral Holder’s Inequality on Fractal Space
Authors: Chen Guang Sheng
Published: August 2014

In this paper, we establish a subdividing of Hölder’s inequality via local fractional integral. Its reverse version is also given.
Experimental Study on Tertiary Piezoelectric Effect of X-Cut Quartz Crystal
Authors: Zhang He Bin , Zhang Zhong Hua , Jin Ya Ding , Jiang Hui Lun , Fan Lin Jun , Yu Xue Cai
Published: August 2014

This Paper has analyzed the relationship between the generation of multiple piezoelectric effects and boundary conditions of piezoelectrics and the experiments have studied tertiary piezoelectric effect of piezoelectric quartz which is applied extensively in engineering practice. We processed our experiment by piezoelectric quartz crystal unit made by two pieces of X-cut piezoelectric quartz, parallel connected it to a capacitor with the equivalent capacitance of about 1,000 times of that of piezoelectric quartz crystal unit and then got the result of pure primary piezoelectric effect excluding tertiary induced effect; then compared it with conventional primary piezoelectric effect and concluded that tertiary piezoelectric effect of piezoelectric quartz is about 1.7% of primary piezoelectric effect; thus quantified longitudinally tertiary piezoelectric effect of piezoelectric quartz crystal, concluded that piezoelectric coefficient of tertiary effect of X-cut piezoelectric quartz is about 0.04 pC/N by experiment and got relative uncertainty and standard uncertainty of the results by such experiment methods respectively as 9.49×10-3and 1.37×10-2. This study on tertiary piezoelectric effect has provided a new approach for improving precision and sensitivity of piezoelectric sensors.
Research on Ultrasonic Propagation at the Contact Interface in Ultrasonic Machining
Authors: Zhang Ming , Jiao Feng , Wang Yu Qing
Published: August 2014

This paper analyzes the factors, which causes the no-linear of the ultrasonic in the processing system, and the reasons of the ultrasonic reflection and transmission at the contact interface according to the wave theory. In this paper, the ultrasonic displacement coefficient, the pressure reflection coefficient, the displacement transmission coefficient and the pressure transmission coefficient are deduced. The relation among the x-axis and included angle, the incident wave, reflected transmitted waves. The relationship between the preload of the piezoelectric ceramics and the ultrasonic propagation is established, and the best of the bolt preload is investigated. The experiment is done to verify the relationship between the amplitude-frequency characteristics and the ultrasonic transducer at different preload, which provides a reliable basis for the ultrasonic system design, installation and maintenance.
The Study on the Effect of Driving Parameters on the Movement of the Stick-Slip Driving Stage
Authors: Zhong Bo Wen , Wang Zhen Hua , Jin Zi Qi , Sun Li Ning
Published: August 2014

In this paper, the relationship of the driving parameters and the movement of stick-slip driving was studied. Firstly, the research status and the principle of stick-slip driving was introduced. Secondly, the math model of the every step displacement and velocity of stick-slip driving was built. By using mathematical models, the relationship curve of the every step displacement and the step time was received through the simulation in Matlab software. Furthermore, in corroboration of the math model, the prototype was designed and the experiment system was built. From the testing of stick-slip prototype, the step displacement in every step time was tested 20 times and the relationship curve of the average every step displacement and step time was obtained. The simulation results are validated by the testing results and the method of reducing the time step to adjust the stick-slip driving step displacement and velocity were proved. In the future, a greater drive power should be researched for improving the movement performance of the stick-slip driving.
Analysis of a 3-DOF Micro-Positioning Stage
Authors: Zhai De De , Fan Shi Xun , Fan Da Peng
Published: August 2014

Firstly a three degrees of freedom micro-positioning stage constructed by flexure hinges is designed, and the simplified model of the stage is established. Secondly, the stiffness of the stage along X, Y direction or around Z direction is deduced by structural mechanics. The difference between finite element method and theory value is less than 7%, so it shows the theory analysis is feasible, further more, stress of the moving stage is analyzed, and the effect curve of the key parameters to the stiffness and stress is obtained. It can be concluded that the stiffness and stress mainly related with the flexure hinge length L and width t, thus it provide a theoretical basis for three-dimensional micro-positioning stage design.
The Optimal Design of Composite Bead Wire Saw Frame Based on SUMT
Authors: Gu Li Zhi , Li Peng , Xiang Tie Ming
Published: August 2014

Composite (multiple) bead wire is an important machine for stone-sheet production with efficiency, but it takes up space, with big energy consumption, uneven thickness, and noise. The current study aims at optimal designing a bead saw with energy-, material-saving, and being light in weight under the constraint of the strength, stiffness and stability for the frame. A 140 rope saw, as a prototype and one of the applications, discussion of two main frames were done with the layouts consisting of the driving wheel, guide wheel, and the supporting wheels from a variety of structural Patterns. By comparison between the triangular and rectangular layouts, a conclusion was drawn that under the condition of all other things being equal, rectangular layout is more reasonable; each wire is supposed to be adjusted for the uniformity of tension of the whole wires. The objective function was taken as the sum of the mass expression of each component of the frame with a series of punishing factors. The hollow structure of double columns with guide grooves and special beams were got, achieving design goals.
Design of Experimental Apparatus for Asynchronous Motor Principle
Authors: Shen Yun , Cao Jian Bo , Zhu Xiu Hui , Lei Xiao Jie , Ye Qiu Ling , Yan Meng Jia , Chen Kang , Gao Zhao
Published: August 2014

Current domestic and international for the experimental apparatus been associated asynchronous motor design generally used hand horseshoe magnet rotates to drive the rotor rotates, While it is possible to achieve, the apparatus is too simple, and the effect is not in great satisfaction. To further improve the experimental results, a new type of asynchronous motor experimental device is designed, whose working mechanism is a DC motor as a driving source, driven by a reduction gear mechanism to produce a rotating magnetic field, the control circuit can be achieved by utilizing the rotational speed and adjust direction. By apparatus of the stator, rotor apparatus, the related motor control and display device design can make the operation more stable, more easily observed. The experimental apparatus can enhance students' awareness and understanding of asynchronous motor, so that the original abstract theory becomes boring incomprehensible gusto, to stimulate students' desire for knowledge, strengthen students' practical knowledge and ability, with higher practical significance. The apparatus simple shaped, with simple and safe operation, is able to facilitate teaching, with better promote the use of value.
Linear Motor Control Algorithm and Experimental Research Based on Feedforward Fuzzy PID
Authors: Xia Lian , Qiu Jing , Han Jiang
Published: August 2014

In this paper, theory analysis, the MATLAB research and experimental verification about feedforward fuzzy PID control have been performed by combining the characteristics of the PID, feedforward control and fuzzy control. Simulation results show that the feedforward fuzzy PID control could improve the response speed of the system and reduce the tracking error of the system which shows the obvious superiority compared with the PID, feedforward PID, and fuzzy PID. Load experiment for such four kinds of control modes is done on the linear motor platform, and the experimental results show that the accuracy of the feedforward fuzzy PID control is obviously higher than the other three kinds of control modes and the feedforward fuzzy PID control is easier to be implemented. The position error of feedforward fuzzy PID control is changeless during the load change, and the change of the speed tracking error is small, which proves that the feedforward fuzzy PID control is suitable for the condition of load change or the great disturbance.
Design on Measuring System of New Type Electrical Resistivity Imaging Exploring Ground Instrument
Authors: Jiao Yang , Wang Jun , He Gang
Published: August 2014

Aiming at the deficiencies of single signal of electrical resistivity imaging instrument, poor anti-interference, fixed electrode arrangement and low-sampling accuracy, etc, this paper designs a new type of high-density exploring ground instrument. Based on MCU as controller, the transmitter uses MOSFET tube driving H bridge circuit to transmit any digital code current signal. Based on FPGA as master controller, the receiver uses 24 bit ADC chip to sample the data, designs the key circuit such as reference source, clock and single-ended to differential, accomplishes high precision data acquisition. Distributed intelligent electrode conversion device uses low power relay, so it is very small and low power consumption. We did the noise test and repeated measurement experiments on pure resistance on this instrument. The experimental results show that the transmitting signal is stable, waveform is standard, resistance curve tested by collecting system and actual curve are coherent, the precision is high and the stabilization is good.
Study on Modal Change Dual Planetary Composite Transmission System
Authors: Zhao Xue Zeng , Wang Xi Gui , Wang Yong Mei
Published: August 2014

In the study of the dynamic characteristics of the system, should pay attention to the influence on the dynamic performance of the system mode change. Mode change is closely related with mutation phenomena of mode localization process, in the natural frequency with the change of parameters, with a large curvature are quickly turned to separate the two natural frequency curve in the close position. Mode change will lead to the drastic changes in the natural frequency and modal energy, the variation of system parameters is also the location of the influence degree mutation position. Based on the modal characteristics of unique two stage power branch double wide helical planetary composite transmission system, studied the mode change phenomena, reveal the modal system changes.
Design of Underwater Welding Robot Used in Nuclear Plant
Authors: Lv Xi Min , Liu Yu Fei , Gao Hai Bo , Ding Liang , Tao Jian Guo , Xia Ke Rui , Deng Zong Quan
Published: August 2014

Through the analysis of operational requirements and environmental characteristics of nuclear power plant pool, we propose the design of underwater welding robot and establish the 3D model. Then, we introduce special functions and system composition of the robot in detail. After that, we propose the cooperation of the moving system and operating system, for the reason that the center position of gravity and buoyancy change when the operating system moves. Finally, we simply introduce control system components, control strategy and simulation results of the robot.
Bearing Check Analysis for Automobile Transmission Based on the Software MASTA
Authors: Li Yong Xiang , Jin Li Hong , Sheng Jia Liang , Yu Fu Jin
Published: August 2014

As the main supporting drive components of the automobile transmission, the transmission bearings are mainly used to support the moving parts installed on the gear shaft, and to ensure the rotary precision of the gear shaft and the rotating parts, which plays an important role on transmission performance. Aiming at the existing problems of the traditional check method of bearing, the objective of this study is to take a five-speed transmission as an example, to accomplish the fatigue life analysis of the bearings of the automobile transmission based on the MASTA software. The simulation modeling of the transmission is built completely to simulate the actual load conditions and complete the process of analysis for the bearings. Analytical results show that using MASTA software can effectively perform the fatigue life analysis of the transmission bearings instead of the general conventional theoretical calculation method in the actual manufacturing process, moreover, the analysis results will provide theoretical basis for the overall optimization structural design of the automobile transmission.
Cutting Data Modeling Based on Artificial Neural Network
Authors: Wang Jun , Yu Feng Qin , Wu Feng He
Published: August 2014

Cutting force is usually obtained based on the experimental data which is conducted under certain cutting condition with certain cutters because metal cutting mechanism study is not mature. As the data are numerous, in different types, and the relationships between them are complex, the commercial database can be used directly. A new approach based on ANN is introduced here for unstructured and discrete data modeling, which transfers the unstructured and discrete data into ANN topology and net weight matrix. In this paper, the experimental data of union cutting force modification are taken as examples for verifying the feasibility of the ANN model. The ANN modeling, inputs, outputs and ANN training are discussed. Compared with other modeling approaches, this model is general and can process discrete data with unified data structure. This model can be used for cutting force calculation as well as intelligent and general CAPP.
Influence of Cracking Damage on Deflection Basin Test Data of FWD
Authors: Qiu Xin , Luo Xiao Hua , Yang Qing
Published: August 2014

With the popularization of falling weight deflectometer (FWD) to calculate the stiffness related parameters of the pavement structures, non-destructive evaluation of physical properties and performance of pavements has taken a new direction. FWD backcalculation is mathematically an inverse problem that could be solved either by deterministic or by probabilistic approach. A review of the currently used backcalculation procedures indicates that the calculation is generally based on a homogeneous, continuous, and linear elastic multi-layer system. Identifying effective data of dynamic deflection basins seems to be an important task for performing modulus backcalculation. Therefore, the main objective of this paper was to discuss the distribution features of dynamic deflection basins of asphalt pavements with crack distresses, and present the reasonable criteria to filter the testing data of FWD deflection basins. Finally, the study aims to validate the established criteria by conducting in-situ case study.
Design of Virtual Machine Assembly Simulation System in Single-Channel Immersion
Authors: Li Jing , Bai Shan Shan , Wang Yi Long , Xi Ping , Li Bing Yi
Published: August 2014

The virtual reality technology has been widely applied in virtual manufacturing; virtual environment which integrated with visual, auditory and tactile can be established. In this paper, a single - channel immersion machine assembly simulation system was built by EON Studio of virtual reality software and virtual peripherals. For building immersion virtual environment, three dimensional entity model of machine was established by the CATIA software, rendering and coloring it through the 3ds Max, inputting interface of EON convert file. Researching on interactive virtual assembly technology of machine was done, two interactive methods were developed through the keyboard ,mouse and other input devices or data glove ,(Flock and Bird) and other virtual peripherals respectively: one was to realize the interaction based on keyboard by the triggering sensor node, event driven and routing mechanism ; another was established the virtual hand, achieving the spatial position of manpower through driving virtual hand by data glove and (Flock and Bird) , and converted it into the position of virtual hand in virtual space, to complete the grasping, moving, releasing the object operation in immersion virtual environment, so that completing the virtual machine assembly, assembly trajectory visualization was realized, the basis was provided for the path of assembly analysis. The human-computer interface of assembly simulation system of machine develop, each module integration was realized by the transmission of information between EON Studio and machine, and reasonable guidelines for machine assembly training was provided.
Fuzzy Self-Tuning PID Controller for Pressure Control in VCM
Authors: Liu Yuan Yuan , Wan Fu Ping , Zhang Hai Guang , Zhang Zhuang Ya , Hu Qing Xi
Published: August 2014

Owing to nonlinearity, time-delay and complexity of pressure control system in vacuum casting (VC) process, the traditional pressure tuning method can’t guarantee the good performance and thus high quality product nowadays. In this paper, a novel pressure control strategy for vacuum casting process, combining fuzzy PID and neural network methods, is proposed to solve this problem. The proposed strategy can on-line regulate pressure difference between low and upper chambers of VCM to meet the pressure requirement in VC process, thus ensuring high quality part. With the aid of Matlab and configuration software – Forcecontrol, the proposed fuzzy self-tuning controller is implemented in a sample machine. The experiment result shows that the presented pressure controller can track the pressure profile accurately and thus can further improve the product quality.
Research on Laser-Driven Flyer Microforming in Warm Condition
Authors: Ma You Juan , Wang Xiao , Xu Peng Hui , Zhang Qiang , Liu Hui Xia , Gu Yu Xuan
Published: August 2014

Laser-driven flyer micro forming process is a promising microforming technology with the advantage of high efficiency, low cost, high flexibility. A series of experiments are conducted to investigate forming ability of aluminum foil with the thickness of 50μm. The effect of forming temperature and laser energy on forming ability characterized by forming depth, forming accuracy and surface quality is quantitatively analyzed. It is found that forming depth observed through three dimensional topography increases with the enhancement of forming temperature and laser energy. By elevating the forming temperature, the preheated workpiece suffers more homogenous deformation, presenting better forming accuracy. However, a certain degree of deterioration of surface integrity at the forming temperature of 200°C can be attributed to the earlier appearance of micro cracks caused by excessive thinning even at low laser energy. Overall, it is concluded that the optimal forming temperature is appropriately 150°C as the forming depth and forming accuracy is improved with no deterioration of the surface integrity.
Research on Factors of High Strength Steel TRB Hot Stamping
Authors: Han Xiu Qin , Li Yun , Lei Cheng Xi
Published: August 2014

This paper discusses the influence factors in the process of hot stamping of high strength steel TRB(Tailor rolled blank) by simulation,using the numerical model referred tothe typical part of vehicle B column structure and BR1500HSas the material model in Abaqus for simulation.By means of numerical simulation using theorthogonal and control variables methods,different models have been designed to research the influence of transition zone gradient (A),fillet radius of punch and die (B), clearance between punch and die (C), friction coefficient (D), thetemperature (E), taking the hoop strain and the material movement along the direction of thick change as the evaluation index.in order to draw the infect law of TRB for hot stamping to find out the best technological parameters group for stamping, which can make theoretical contribute to the TRB application. The research shows that the influencedegree order of different factorsis:D>E>C>A>Conly taking the hoop thick into consideration,then influence order is E(A)>D>B>C only taking the material movement along the direction of thick change.