bluuebunny/crossref_metadata_2025 huggingface dataset:
The Research on Tests for Detecting Strength of Shallow Asphalt Pavement under Ice Frozen
Authors: Zhao Mao Cai , Gao Shi Xian , Shi Da Wei , Huang Qi Shu
Published: July 2012

The thesis utilizes the Penetrating Strength Detector of Shallow Pavement to conduct impacting penetration experiment, uniaxial compression test and diametral compression test to asphalt mixture of different void ratios and cycles of freezing and thawing, and then we’ve obtained the relationship between average penetration depth and compressive strength as well as tensile splitting strength of mixture, moreover, the initial reference standard of the Penetrating Strength Detector of Shallow Pavement is established. Afterwards, the thesis conducts impacting penetration test to the asphalt pavement cores from Chongzun freeway in Guizhou Province suffering from ice frozen damage. The effectiveness of the Penetrating Strength Detector of Shallow Pavement has been proved.
Compacting Properties of Zeolite Based Warm Asphalt Mixture
Authors: Yang Li Ying , Tan Yi Qiu
Published: July 2012

Warm asphalt mixture develops rapidly throughout the world in recent years. Zeolite based warm mix is one of the warm mixtures. In this paper, seven kinds of zeolites including six natural zeolites and one synthetic zeolite are selected. As warm mix additives, their physical properties such as density, water content and pore arrangements are tested respectively. To evaluate the compacting properties of zeolites based warm asphalt mixture, AC-20 mixture is designed and compaction is conducted. It shows that zeolites can reduce the compacting temperature for both Marshall and gyratory compaction. Temperature is the main factors which influence the compaction effect. Type of zeolite affects compaction to some extent. Marshall compaction is more sensitive to zeolite than gyratory compaction.
Classification of Mobility of Cellular Phone Using Linear Classification and k-Clustering
Authors: Wang Shi Long , Wang Hua
Published: July 2012

Road traffic data is a fundamental element of intelligent traffic system. However, due to the high investment of the road sensor, the availability of the traffic data is so limited that it can’t satisfy the requirement of current situation. Using cellular phone information as road traffic data becomes an attractive alternative because of its low cost, widespread and high cover rate. Until now, there are several algorithms to process the cellular phone information and most of them present promising conclusion. However, in order to get the satisfying conclusion, nearly all of these methods depend on a high amount of sample, in which way will detract the real-time performance of the traffic regulation and control. This is we don’t want to see. In this paper, we proposed a process to collect the information of cellular phone based on the simulation of working mode of the real base station, i.e., putting an appropriate instrument on the side of the road to detect the cellular phone passing by. Using the data we got, then we proposed a method to classify the mobility of the cellular phone, which is the critical problem of the analysis of the cellular phone information. Two key attributes are the average vehicle velocity and the variance of the vehicle velocity.
Test Study on Road Performance of Soils Stabilized by Liquid Stabilizer in Seasonally Frozen Regions
Authors: Chen Yao , Tan Yi Qiu
Published: July 2012

In seasonally frozen regions, road construction often suffers from low strength,lack of durability, etc. Improving the typical clay’s workability in Changchun with lime and the Base-Seal stabilizer (BS-100) shows promising results. A comprehensive investigation to assess the soil characteristics influence is undertaken, so as the lime and liquid stabilizer (BS-100) content on the physical properties of stabilized soils in seasonally frozen regions. The optimum mix proportions, unconfined compressive strength, splitting strength, modulus of resilience, freeze-thaw action, water resistance and penetration-resistance were outlined. By comparing with current specifications, the Base-Seal stabilized soil as base material has higher early strength, higher after-strength and better frost stability.The results can be applied in road construction in seasonally frozen regions.
Dynamic Water Effect on the High Temperature Stability of Asphalt Mixture
Authors: Hou Ming Hao , Tan Yi Qiu , Hu Bin
Published: July 2012

This paper introduces dynamic water effect into the test, develops a laboratory test device for simulating the dynamic water effect on asphalt pavement, and puts forward a test method of dynamic water effect working together with load, water and temperature. Based on this method, the high temperature stability of seven kinds of asphalt mixtures with the factors of asphalt grade, gradation and air voids are studied. The research shows that the effect of dynamic water can take adverse effect for the high temperature stability of asphalt mixture. The effect degree is different under different factors. It is the most disadvantaged when the air voids of the mixture is near 10%, the skeleton structure gradation of mixture is better than the suspended structure at the most disadvantage air voids, and the mixture made of high viscosity asphalt is more affected when the temperature is higher.
Study of Road Performance between Rub-Concrete and Normal Concrete Materials
Authors: Wang Long , Xie Xiao Guang , Fan Lu Lu
Published: July 2012

To improve the cement concrete deformation, small toughness traditional defects, with Adding the rubber grain in the concrete to form the rubber particles concrete; flexural modulus of Rubber particles of concrete and ordinary concrete was comparative studied, two kinds of concrete damping change was analyzed by using the finite element, through three point concrete trabecular bending test, the fatigue properties were comparative researched , the rutting test methods were used in proving the rubber particles of concrete of erosion performance; According to the test made the mechanical parameters of acquired in experiments , the applying the MEPDG 2002 design method, the road surface damage state were forecasted of the two kinds of concrete pavement in the design of the end; Experiment shows that rubber particles cement concrete flexural modulus is reduced by 12% than that of ordinary cement concrete, the damping ratio increased by 30%, the fatigue life have greatly improved, and surface erosion phenomenon did not happen; Theoretical analysis shows that, the rubber cement concrete panel breakage is lower 30% than ordinary concrete, Therefore, the rubber particles concrete pavement can overcome the traditional l defects of cement road and with has excellent road performance.
Theory of Allocating and Scheduling Resources at Airport Passenger Terminals: A Review
Authors: Cheng Shao Wu , Zhang Ya Ping , Guo Yuan Yuan
Published: July 2012

This paper reviews theory of allocating and scheduling resources at airport passenger terminals, from three aspects, that are method of integrating airport operational data, method of predicting passenger flow at airport terminals and optimization method of allocating and scheduling resources at airport terminals. Directions and challenges of future research are identified.
Study on the Scale Determination of Urban Rail Transfer Station
Authors: Wang Yu Ping , Zhang Ya Ping , Xu Hui Zhi
Published: July 2012

As the major distributing center and intermediate transit point, the scale of transfer station in urban rail transit system directly affects the operational efficiency and overall cost of the entire system. So, accurately controlling the scale of transfer station becomes one of the most important aspects in improving service level and reducing the overall project cost. On the basis of summarizing the method on determining the scale of transfer station both home and abroad, the paper describes the role of the various facilities in rail transfer station, and illustrates the problems of our rail transfer station. Following the above discussion and investigation, the sizes of typical transfer station facilities are discussed and improved (e.g. vertical elevator). Taking the Longjiang Street station example, the proposed methods and models are verified and the analysis result shows that this transfer station should be cross platform interchange mode.
Influence of Post-Processing Methods on the Conductive Properties of Nano-Silver Conductive Ink
Authors: Li Wei Wei , Mo Li Xin , Fu Ji Lan , Li Wen Bo , Fan Xin Ming , Ran Jun , Li Lu Hai
Published: July 2012

The article prepares the jet ink with nano-silver synthesized by the lab and then adjusts the parameters of the silver colloid to fabricate nano-silver conductive ink suitable for ink-jet. Then patterns are obtained on the photo paper through EPSON ME 70 jet printing, and treated by three post-processing methods include laser sintering, heating, and solution soaking, which measured by four- point probe measurement and observed by SEM. It shows that after treatment the surface resistance of the patterns all decrease obviously. Patterns heated at 120°C for 10min, the resistance is 815mΩ/□, while the surface changes of silver layers can be observed obviously from SEM images. But the surface of the photo paper is destroyed with some bubbles on the coating surface. After 10min of laser sintering, the resistance of the silver layer reaches 890mΩ/□ from infinity. And when immersed in the NaCl solution for 5min, the patterns’ surface resistance decrease to 2.7Ω/□.
An Investigation on the Structure of Amorphurs Nano-Silica by XRD Method
Authors: Xie Hong Yong , Ma Chang Wen , Wang Jing Rong , Chen Sheng Wen , Bing Nai Ci
Published: July 2012

Using Faber and Ziman depolarized scattering function theory and modified Kaplow method for eliminating cut off error，the structure of amorphous silica nanoparticles synthesized by a flame CVD process has been investigated. From measured intensities, reduced scattering intensity and radial distribution functions and thus the average atomic distance and the nearest coordination number were obtained. And the influence of particle size on the structure of the amorphous silica nanoparticles was also reported.
Characteristics of TiCN Film on AZ31 Magnesium Alloy Deposited by Radio Frequency Magnetron Sputtering
Authors: Huang Jia Mu , Meng Xi , Chen Wei , Sui Shi Yu
Published: July 2012

Titanium carbonitride (TiCN) films were deposited on AZ31 magnesium alloy by radio frequency magnetron sputtering. The surface morphology and microstructure were investigated by scanning electron microscopy (SEM) and X-ray diffraction (XRD), and the corrosion resistance was studied by potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS). The results show that TiCN coatings deposited on AZ31 magnesium alloy are amorphous, and reveal good adhesion onto the substrate. The corrosion current density of TiCN-coated magnesium alloy was 1.664×10-6 A/cm2, which decreased by more than one order of magnitude compared to the uncoated magnesium alloy (1.785×10-5 A/cm2).
Effect of Solution Pressure on Microstructure of AM60 Magnesium Alloy
Authors: Yue Xue Qing , Li Da Jun , Fu Hai Jun
Published: July 2012

As-cast AM60 magnesium alloy was solid dissolved for 40 min at 450 °C under different pressures, atmospheric pressure, 3, 4 and 5 Gpa. The microstructure of the products was characterized by optical microscope and X-ray diffraction. The results show that increasing solution pressure promotes the fracture and dissolution into the α-Mg matrix of the coarse β-Mg17Al12 phase distributed along the grain boundary with a network appearance.
Thickness of Magnesium Alloy Cylindrical Cup in Pressure-Lubricating Deep Drawing
Authors: Mao Xian Chang , Lin Hai Yan
Published: July 2012

Forming process of AZ31B magnesium alloy cup parts in pressure-lubricating deep drawing was simulated by Dynaform at room temperature. The technological parameters which influence the wall thickness difference of cup parts were investigated in this paper, including internal pressure, blank holder force and punch corner radius, etc. Compared with the deformation behaviors of magnesium alloy in mechanical deep drawing and pressure-lubricating deep drawing, the wall thickness distribution of cup parts was discussed. The result shows that preferable deformation behaviors can be obtained in pressure-lubricating deep drawing when adopted adaptive technological parameters.
Research on Properties Improvement of Composite Aluminum Alloy Foil Based on Cold-Rolling Cladding
Authors: Tai Qian
Published: July 2012

The cold-rolling cladding process of composite aluminum alloy foil for automobile heat exchanger was investigated, as well as the effects of percentage reduction of first pass, clad sheet thickness and final annealing schedule on the microstructure and properties of the foil. The results showed that bonding the clad sheets A4045 to the core material A3003 on both sides succeeds initially when the percentage reduction is 30%~50% of first pass during cold rolling, and the thickness of both the clad sheets of the composite foil are basically the same. The best sagging resistance is available when the percentage reduction of final pass is 25%~35%. The annealing temperature should be controlled in the range from 320 to 400°C before finish rolling, and the annealing time should control within 80 minutes when annealed at 400°C.
Effect of Boron on the Melting Dynamics of Iron Base
Authors: Zhao Ding Guo , Wang Shu Huan , Li Qiu Jing
Published: July 2012

Analyzed the melting process of iron base which contacted tightly with boron slag, established the boriding melting dynamical model of iron base and calculated the melting rate of pure iron. The melting rate of pure iron is not only decided by heat transfer rate, but also related to the mass transfer rate of boron. With the resolving of the model, we can know that the melting rate of pure iron is 3.41mm/min, and melting time is 15 min. When the speed of heating is high, the melting rate is mainly decided by diffusion.
Influence of Oxygen Plasma Treatment on Properties of Polyester Fabrics Coated with Copper Films
Authors: Meng Ling Ling , Wei Qu Fu , Li Yue Li
Published: July 2012

A lab radio frequency (RF) magnetron sputter coating system was used to deposit the nanoscale copper (Cu) films onto the surface of polyester plain fabric at room temperature. In this study,the polyester fabrics were treated under different duration with low temperature plasma.The effect of oxygen plasma pretreatment on surface morphologies,antistatic properties,mechanical properties of the copper-coated polyester fabrics is investigated. The surface morphology of modified polyester fabrics was characterized by atomic force microscopy (AFM).The AFM observations revealled the obvious corrasion was formed on the fiber surface,the sputtered copper particles were hard to cluster and uniformly distributed on the fiber surface with longer duration of plasma treatment.The antistatic properties of the copper-coated polyester fabrics was greatly improved after the oxygen plasma treatment.The hydrophobic behavior of the coated samples was also significantly improved .
Optimization of Sanding Parameters for Surface of Laminated Veneer Lumber of Eucalyptus
Authors: Su Chu Wang , Huang Jing Da , Zhang Jian Min , Ren Yi , Wang Ze Kun
Published: July 2012

In order to analyze the relation between wood surface roughness of Laminated Veneer Lumber of Eucalyptus and sanding parameters, an orthogonal experiment and a single factor experiment were performed. The results show that the mesh of the sandpaper has remarkable influence on wood surface roughness of Laminated Veneer Lumber of Eucalyptus, but the feeding speed and sanding thickness don’t; when the mesh of the sandpaper is 150, the feeding speed is 6 m/min and sanding thickness is 0.6 mm during the first sanding and the mesh of the sandpaper is 320, the feeding speed is 9m/min and sanding thickness is 0.2mm during the second sanding, the smallest roughness (Ra) was obtained as 2.45μm. Considering production efficiency, changing feeding speed into 9 m/min, engineering optimization scheme was obtained, and the wood surface roughness (Ra) is 2.70μm.
Anti-Friction Effect of Graphite Nonasheets Formed by Sonicating Expanded Graphite
Authors: Liu Zhi Guo
Published: July 2012

Graphite nanosheets were prepared by sonicating expanded graphite (EG) in a liquid medium. The products were characterized by scanning electron microscope (SEM), and its anti-friction effect used as additive of base oil was investigated. The influencing factors of its anti-friction effect, the weight ratio of graphite nanosheets to base oil, the sonicating medium and sonicating time, were studied and optimized. The results show that under the optimum conditions the graphite nanosheets exhibit an excellent anti-friction effect.
Investigations on Broken Rules of the 20# Cylindrical Steel Shell under Inside-Explosion Loading
Authors: Wang Deng Wang , Qin Xue Jun , Tang Shi Ying , Liu Wen Xiang , Wang Hui
Published: July 2012

Broken rules of cylindrical steel shell subjected to internal blast loads is the foundation for conducting safety assessment and failure analysis of explosion containment vessels. The experiments were carried out broken rules of the cylindrical steel shells subjected to internal blast loadings at the centers. The elastic-plastic response of cylindrical steel shells was conducted using nonlinear dynamic finite element analysis code LS-DYNA. The results show that the deformation was’t a discrepancy in the explosion center of the cylindrical steel shell in same space, and the deformation descended slower along with thickness augmentation in the end of explosion center. The radial stress、hoop stress and axial stress was a discrepancy in the thickness way of cylindrical steel shell of explosion center The most leading cause of destructivity of cylindrical steel shell was that inner wall bearing normal stress and exterior wall bearing tensile stress; the hoop stress was broken more than axial stress cylindrical steel shell. The whole process was presenting hoop fractured and axial growth.
Research of Non-Destructive Testing of Wire Rope Using Magnetic Flux Leakage
Authors: Zhong Xiao Yong , Zhang Xiao Hong
Published: July 2012

Based on the magnetic theory, the paper reviewed the factors of affecting the distribution of magnetic flux leakage (MFL) on the ferromagnetic material and analyzed the wire rope defects characters from MFL signal. A non-destructive testing (NDT) instrument of steel wire rope using magnetic flux leakage was presented in this paper. By using permanent magnets to magnetize wire rope and using Hall element arrays to test MFL, Intelligent signal processing was applied for effective discrimination of wire rope’s flaws. The experiment results show the degree and the width of defects, the annular distribution of localized flaws such as concentrated or dispersive broken wires can be well distinguished. The instrument can be used conveniently with good resolution and repeatability and can meet the requirement of real time.
Study on Electrospinning of Polyvinyl Butyral/Ethanol Solution
Authors: Wang Long , Zhang Xing Hua
Published: July 2012

Preparing polyvinyl butyral (PVB) shrinkage of nanofiber by the electrospinning technology. The main effects of different process parameters on the shape and the diameter of the PVB/ethanol solution electrospun fiber have been discussed. The SEM observation as well as Image-Pro Plus Image processing and SPSS Statistics software analysis indicated that in the 6.9% concentration with 20 KV electrostatic voltage , 15 cm collect distance condition obtains the prefer nanofiber.
Ring-Shaped Silicon Resonator Using (2,1) In-Plane Resonance Mode
Authors: Suzuki Kenta , Ioka Kumiko , Nishioka Yasushiro
Published: July 2012

A ring-shaped low-frequency resonator operating in the in-plane (2,1) mode was designed and fabricated utilizing anodic bonding of a 9-µm-thick single-crystal silicon to a glass substrate. Although the gap between the ring and the driving electrode was relatively large (900 nm), a high quality factor of 4212 at 1.609 MHz was realized. The motional resistance was 1.853 MW. In addition, the resonant frequency was electrically tuned by varying the dc bias of drive electrodes with 21.5 ppm/V. Therefore, it was expected that this resonator could possibly replace low frequency quarts resonators of a few MHz ranges.
Analysis and Simulation Evaluation of a Novel Metallic-Disc Flexible Coupling
Authors: Min Xu Guang , Hu Guo Liang
Published: July 2012

In additional to transfer the torque safely, the coupling of the diesel generator set should also has the function of compensating the relative offset distance between the centre line of the diesel crank shaft and the centre line of the generator rotor axis. In this paper, a new type of metallic-disc flexible coupling for diesel generator set of 500kW power was designed. The working principle of the metallic-disc flexible coupling was expounded in detail, and the comprehensive force performances of the metallic-disc were also analyzed. The simulation analysis was carried out to determine the optimal numbers and thickness of the metallic-disc using ANSYS software. So, the needed torque and the coaxiality between the two axes can be guaranteed. The relevant results can provide some guidance for the improvement design of domestic diesel generator set.
The Fatigue Strength Assessment for Hull Structure of Steel Fishing Vessel
Authors: Yang Gao Sheng , Xie Yong He
Published: July 2012

According to the norms “the fatigue strength assessment for hull structures in 2007” issued by China Classification Society, the combined computing platform established is composed of mature hydrodynamic software SESAM from Det NorskeVeritas(DNV)and MSC.PATRAN/NASTRAN, the fatigue strength assessment for hull structure of a steel fishing vessel is studied.
Improvement of Quality and Efficiency in Mineral Material Processing under Extreme Dynamic Environments
Authors: Lian Wen Li , Xiang Bo , Zhou Ping
Published: July 2012

In mineral processing the high material volumes yield the fact that benefits of even small improvements in the production quality and product efficiency are remarkable. During the operation of the mineral material processing, the grinding circuit (GC) is the key unit and its product particle size and circulating load are two controlled indexes directly related to the quality and efficiency of the whole mineral material processing. Therefore, an appropriate control of GC is especially significant to improve the operation performance of the mineral material processing. Due to the GCs are essentially multivariable dynamic systems with high interaction among process variables. It is hard to improve the quality and efficiency in the mineral material processing by controlling the grinding system with the conventional methods. In this paper, a novel multivariable decoupling control scheme is adopted to handle such intricate process. Simulations have shown the proposed method can greatly improve the production quality and product efficiency of the mineral material processing.
Influence of the Ink-Jet Condition to the Piezoelectric Drop State of Edible Ink-Jet Ink
Authors: Sun Jing Mei , Wei Xian Fu , Huang Bei Qing
Published: July 2012

The drop state of the ink-jet ink is an important factor that influences the ink-jet imaging quality, so the drop state under different voltage and frequency is researched in order to research the influence of the ink-jet condition to the drop state. The edible ink sample is printed with Spectra Polaris nozzle under different ink-jet condition including voltage and frequency, and the drop state is observed by drop observation. The result shows that while voltage increases, drop speed increases and drop volume increases first and decreases then. The duration time of drop necking state is the same under different voltage, but the tail length becomes longer if the voltage is up to 120V. The drop speed is stability under the frequency of 2KHz-4KHz, but when the frequency continues to increase, the speed shows a trend of decrease.
An Improved Randomized Hough Transform Method for the Cotton Recognition
Authors: Liu Kun , Fei Shu Min , Wang Mu Lan
Published: July 2012

The cotton recognition would become rather difficult during the application of the cotton harvesting robot (CHR) in the case where the cotton is sheltered or covered by other objects. In this paper, a novel approach of cotton detection based on the improved randomized Hough transform (IRHT) for this case is proposed. Based on the contour information from the boundary trace, the mathematic model-based IRHT is derived based on a modified circular detection technique. It yields a well agreement with the requirements of the precision and rating of CHR.
A Study on Static Features of a High-Speed Solenoid Valve Used in Diesel Engine
Authors: Chen Na , Wang Yan Song , Guo Hui , Lei Jie , Zhang Tao
Published: July 2012

Based on the Maxwell equation and simulation analysis method, this paper investigates and retains the optimized parameters of a high-speed solenoid valve, which is very important for electrical unit pump (EUP) diesels. According to the electromagnetic theory, firstly, a three-dimensional (3D) model of the solenoid valve is established, and working process of the electromagnets is analyzed by using both the theoretical method and Ansys Workbench software. In view of the electromagnetic force, furthermore, several parameters related to the solenoid valve performance are considered and their effects on solenoid valve are analyzed and discussed. Finally, the optimized parameters are proposed for the analyzed solenoid valve and proved by theoretical equations. The studied approach can be extended to any other field related to the electromagnetic device design.
The Analysis of Fault Diagnosis on Motor Devices
Authors: Wang Hong , Men Xiao Shuang , Zhang Yu Xian
Published: July 2012

In this paper, author analyses the basic principle of fault diagnosis in motor device, and discusses systematically the modern methods of fault diagnosis in motor devices, and overviews the characters of each method and points out the trend of fault diagnosis in motor device.
Rebound Analysis for the Diesel Engine Pre-Tightened Bolt Using ABAQUS
Authors: Zheng Yu Qing , Cheng Ya Xian , Zheng Yu Xia
Published: July 2012

When the nuts are tightened on the big bore diesel engine through the hydraulic tensioner, the preloaded forces imposed on the studs are often less than the design values. In order to get the difference, finite element method was introduced and stress analysis was implemented in Abaqus. Meanwhile the finite element model was modified based on the real test result. Eventually reliable difference results were obtained and the modified model could be applied in the other research.
Numerical Analysis on Sealing Properties of Mechanical Seals with a Laser-Textured Face
Authors: Hao Hui Qin , Yu Xin Qi , Liu Qing Gang , Yu Jia Hui
Published: July 2012

An analytical model is developed to study the sealing performance of the mechanical seals with a laser-textured micro-pore face. The pressure distribution between the seal faces at various operation conditions and micro-pore geometry parameters can be obtained from a solution of the Reynolds equation by finite difference method, and then opening force and liquid film stiffness can be calculated. Seal face geometry parameters can be optimized by analyzing regulation of their effect on opening force and liquid film stiffness. Results of parametric study demonstrate that substantial hydrodynamic effect can be produced on the seal face with micro-pores.
FEA on Vibration Characteristics of an Aero-Engine Compressor Disc
Authors: Zhao Wei Qiang , Liu Yong Xian , Lu Mo Wu
Published: July 2012

This paper presents a FEA method for vibration characteristics analysis of aero-engine compressor disc. An actual modal analysis of a certain aero-engine compressor disc is made based on this method. The first ten natural frequencies and modes of this compressor disc in fully constrained boundary condition and in free vibration condition are obtained respectively. And also, the vibration characteristics of each natural mode and its effect on compressor disc and other accessories are analyzed in depth. The analysis process and results presented in this paper can be references for further study on optimal design and vibration safety verification for this aero-engine compressor disc.
Computational Simulation of Failures in Brittle Materials
Authors: Lu Sai Qun
Published: July 2012

The paper used computer simulation techniques to model the failure process of brittle materials. The simulation method is the finite element method. We have prepared a quad tree method program, through which the unit discrete planes structure, and the quick automatic generation of quadrilateral elements of good quality, and the discrete units of information and node information. We use object-oriented method of preparation of the finite element program, and use it for displacement in the destruction of the simulation, stress analysis. We simulate the failure process of brittle materials. Simulation, the choice of failure criteria and damage model are two key, they choose the proper relationship to the simulation results, good or bad. According to the characteristics of brittle materials, select the first strength theory as a failure criterion and a damage model suitable for brittle materials. The model assumes that a crack in the destruction of the cell boundary, and then through the crack surfaces and the distribution of the load to compensate for the energy released when the virtual cracks. Finally, the destruction of the material is given by the computer graphics form.
Studies on the Processing Conditions for Preparation of Polyol Using Beet Pulp
Authors: Yan Xiao Lin , Wang Ke Bing
Published: July 2012

The catalyzed liquefaction degradation of beet pulp (BP) had been studied in the system of solid silicotungstic acid and polyethylene glycol 400 (PEG400)/glycerol (GLY), in which the solid silicotungstic acid served as the catalyst, and the latter was the complex liquefacient. This paper investigated the influence of processing conditions of BP liquefaction on the liquefaction reaction and the properties of liquefaction product. The results showed that BP had a good liquefaction effect, and the optimum liquefaction processing conditions were founded as follows: the weight ratio of PEG 400/glycerol was 4:1, the liquefaction temperature was 175oC, the catalyst amount was 8%wt, the solid-liquid weight ratio was 1:12, and the liquefaction time was 135 min. In these conditions, it was found that the best liquefaction rate would reach 99.5%, the hydroxyl and acid values of liquefaction mixtures were 52-82mg/g and 0.61-0.75mg/g respectively, the final products were lower hydroxyl value plant-based polyol.
Method of Bearing Fault Identification Based on SVM Decision Tree
Authors: Cheng Hang , Li Xi , Qin Zheng Bo , Huang Chao Yong
Published: July 2012

This paper has put forward one method, combining with theory of decision tree and method of voting, and established one kind of multi-failure classifier of SVM, which could finish cross training, repeated classification and accumulative voting. This classifier could accomplish classification of failure bearings and do classification experiments among failures of kinds of bearings. The results have shown that this method could identify states of breakdown equipment for the purpose of diagnosis of failures of mechanical system accurately.
Quality Monitoring and Prognostic of Electronics Using Multidimensional Time Series Method
Authors: Wan Bo , Wang Li , Fu Gui Cui
Published: July 2012

This paper presents a quality monitoring and prognostic method to evaluating quality of electronics through monitoring degradation path. Electronics multiple performance parameter degradation data are treated as multidimensional time series and described using multidimensional time series model to take into account implements of stochastic nature of environmental variables and to predict long-term trend of performance degradation. A degradation test is processed for certain electronics and three kinds of performance parameters degradation data are monitored for prognostics. A comparison between the predicted degradation path using multidimensional time series analysis, the predicted degradation path using one-dimensional time series analysis and the real degradation path of the electronics is processed and the results show that the degradation path prediction using the suggested method is more effective than one-dimensional time series analysis.
Research on Edge Detection Algorithm for Caption Extraction from Video Frames
Authors: Wu Jin
Published: July 2012

Text area extraction from video caption has become an important tool for content-based video retrieval. Test object is frame data intercepted from video data. This paper proposes an algorithm of edge detection to extract caption text that embedded in the video frame by grayed processing. Experimental results have shown that the proposed approach is very effective in text area detection.
Study on Remote Monitoring Visualization System of Roof Support
Authors: Zhang Wen Lei , Zheng Xiao Wen , Chen Bao Feng , Peng Yang
Published: July 2012

Data, curves or 2D graphics are displayed in the traditional remote monitoring system of roof support, without real-time display of working status of roof support in 3D graphics. In order to solve this problem, VB6.0 programming language and EON Studio software were combined. Communication protocol between VB6.0 and EON Studio and the way of external control on EONX were analyzed. Data acquisition system with ADAM-6017 Data Acquisition Module was designed. The remote monitoring visualization system of roof support driven by parameters of displacement and attitude was developed by means of the Ethernet transmission. The system lays a favorable foundation for remote visualization of working status of mining machinery.
Method Research and Practice for Numerical Simulation Analysis of Temperature Field of Hot Runner of Injection Mould
Authors: Chen Feng
Published: July 2012

In this article, it is studied how to establish and solve the mathematical model of temperature field of hot runner of injection mould, visual numerical simulation analysis for temperature field is realized with computer, and finally corresponding example is cited.
The Application of Variable-Structure Control in Theodolite Fast Capture
Authors: Ge Bing
Published: July 2012

The high capability of O-E theodolite to track and acquire fast moving targets is required these years because of the rapid advancement of tested targets and automation of equipments. The traditional method of increasing the frequency width is limit. By using multi control models and velocity leading, the capability to track and acquire fast moving target is improved highly. The theories and technologies discussed in this dissertation were tested with experiments. It verifies that the theoretical analysis in this dissertation is correct.
The Design of Power Equipment Monitoring System Based on Wireless Sensor Network
Authors: Wang Ming Wei , Yao Zhan , Li Hui Zhen
Published: July 2012

In order to prevent the power system from the failure, an amount of spatially distributed sensors to monitor working conditions of the power equipments are needed. Using the wire cable to transmit the monitoring data usually caused the inconveniences of installation, inspection and maintenance in traditional wire monitoring system. Based on analyzing the advantages of wireless sensor networks (WSNs) and summarizing the key technologies of applying WSNs on monitoring the health of the electrical equipment of the power system, the new design of the power equipment temperature monitoring system based on wireless sensor network is developed in this paper. The new design has been proved to be effective to improve the flexibility, the real-time and the reliability of monitoring the health of power equipment system in practices.
Discriminative Action Recognition Using Supervised Latent Topic Model
Authors: Zou Huan Xin , Sun Hao , Ji Ke Feng
Published: July 2012

We present a discriminative learning method for human action recognition from video sequences. Our model combines a bag-of-words component with supervised latent topic models. The supervised latent Dirichlet allocation (sLDA) topic model, which employs discriminative learning using labeled data under a generative framework, is introduced to discover the latent topic structure which is most relevant to action categorization. We test our algorithm on two challenging datasets. Experimental results demonstrate the effectiveness of our algorithm.
Embedded Digital Oscilloscope Based on STM32 and μC/OS-II
Authors: Shi Jian , Guo Mian
Published: July 2012

This paper introduces one design method of embedded digital oscilloscope based on STM32 and μC/OS-II. The hardware adopts STM32 and the custom data buffer to realize the 2 channel data synchronizations. The software uses the μC/OS-II platform to realize the multi-duty movement and the real-time processing. The test indicates that this embedded digital oscilloscope supports 2 channel inputs and the sampling frequency scope is 25Hz to 10MHz. Its input voltage is -3.6 V to +3.6 V and it has good man-machine interaction contact surface.
Overview of Development Plans for Magnetic Bearing Control System
Authors: Zhu Xiao Ming , Teng Wan Qing
Published: July 2012

Magnetic bearing is a new type bearing used in many fields. An appropriate controller can greatly improve its dynamic performance. With the development of software and hardware of computer, many new platforms appear suitable for studying of controller of magnetic bearing. Typical software platforms include universal operation systems, such as Dos, Windows, and some special operation systems, such as RTLinux. Some applications, such as Matlab/Simulink, can also be applied. And typical hardware platforms cover PC, DSP and some special embedded computers. The design mode of the controller also advances from code design to model design. Many new development plans of magnetic bearing controller based on these platforms and design mode have many advantages over old platforms. For designers, the development plans based on theses new platforms are good choices for bringing about a stable, short development period, low cost controller.
The Design of Spectrometer Detection and Control System Based on C8051F350
Authors: Zhao Yuan Yuan , Sun Jie
Published: July 2012

This paper designed a photoelectric detection system based on C8051F350 , which can be used in the grating spectrometer system. Aiming at traditional detecing methods, this paper puts forward a multi sensor data fusion technology which can fuse detecting data from multi photomultipliers. It has very strong practicability that detection data can be transmit to the computer through the serial port to draw curve of spectrum.
Application of Vacuum Preloading for Soft Foundation Treatment in Grain Storage
Authors: Liu Qi Xia , Zhao Yang
Published: July 2012

The application of vacuum preloading for soft foundation treatment in grain storage is introduced from its principle，design，construction and the inspections. Its obvious effect is proved by example. The east coast of China is the most developed economical area and major grain and oil manufacturers. Many grain and oil depots have been established. However, in the places where the depots located, soil is soft dirt with low strength grade, high compressibility, small permeability and high possibility of plastic flow, has increased difficulties of grain and oil depots foundation construction. Without enough knowledge of soft soil and lacking of proper foundation construction method and good technology, depots may slip due to foundation’s erosion, and big settlement. If the structure slips, equipments for aeration, dehumidifier, antivirus equipment cannot work well. Based on the statement above, reasonable and effective methods for soft soil foundation work is the key point for construction of high quality and high standard grain and oil depots. This paper mainly discussed when we do depots construction work on the soft soil foundation, exact calculation, construction method and result test of fasten method for the soft foundation under the vacuum circumstance of preloading.
The Combined Guiding Hole Technology of Large Diameter DTH Hammer and Long Screw-Pile Driver
Authors: Liu Qi Xia , Fan Liang
Published: July 2012

From an engineering reality, in order to solve complex stratigraphic drilling problems and improve construction efficiency, the method of combination of large diameter DTH hammer and the pile driver with a special long spiral drill multifunctional is proposed. This method has the characteristics of simple equipment, fast, effective, low cost etc. It can quickly drill through layers of gravel, stone, weathered bedrock, reach to depth up to above 25m. It has been widely used in embedded engineering methods of precast piles, the long spiral rock-socketed piles, piles into the rock currently. The study of this construction method has not only wide range of applications, but also has a wide range of practical and theoretical significance.
The Records of Slope Reinforcement Engineering in a Loess City
Authors: Liu Qi Xia , Fan Liang
Published: July 2012

This article selected a typical loess slope engineering as the research object, and through the characteristics of loess landslide, landslide environmental geological conditions, the formation mechanism of the landslide study of the loess area of urban slope instability factors, loess slope stability of the calculation method and reinforcement measures, the loess slope stability study area has a large reference.
Bending Deformation of U75V Heavy Rail through Natural Cooling Process
Authors: Song Hua , Tong Shan Hu , Jiang Juan Juan , Jia Hao , Yuan Si Yu , Liu He , Lian Fa Bo , Li Kui Xing
Published: July 2012

The cooling process of heavy rail is the important step to the output, that the preflexed rail is cooled on the stepping-type cold bed which has been carried by the chain transmission device. We employed the finite element method to analyze the bending deformation of the U75V rail through natural cooling process, the effected factors including the rail side-laying on the cold bed, the latent heat of phase change, and the thermal radiation are considered in the analysis. In the paper, we discussed the establishment of the heavy rail cooling model, the cooling parameters and the boundary condition, and emphatically analyzed the rail bending deformation changes and its principles through the cooling process. The study of the hundred-meter high speed heavy rail can provide the theoretical foundation and reference value to the formulation of cooling technical parameters and preflex technical schedule.
Evaluation Model of Dike Safety Based on Cusp Catastrophe Theory
Authors: Shen Xi Zhong , Yang Xiao Ping , Ma Wei Dong
Published: July 2012

Evaluation indexes (monitoring value) set in safety evaluation of dike, it was difficult in conforming the range of evaluation indexes, and could not reflect characteristic of outburst destroy. Catastrophe theory is a kind of mathematical method that problems of transition, discontinuity, and abrupt qualitative change based on analysissitus, problems about how a system of continuous quantitative change to evolving into jumping qualitative change can be analyzed. Firstly, the relation between deformation of dike with components of water pressure, temperature and time effect is analyzed, subdivision lemma of cusp catastrophe theory is cheesed, expression of potential formula on horizontal deformation is carried out based on influence of factor of time, water pressure and temperature. Moreover, normal form of catastrophe is advanced and critical rules of dike safety are put forward, evaluation model based on catastrophe theory is established. Finally, the model is validated with dike of Yellow River. Analysis shows that evaluating conclusion of the model is as the same as the practice, and it can not only reflect outburst destroy character of dike, but also evaluate safety degree in quantity, thus the model is good in adaptability and precision.
Mechanism Dynamics Analysis of Inertia Vibrating Screen
Authors: Xu Zu Bin , Min Jian Qing
Published: July 2012

The inertia vibrating screen mechanism is taken as an example for the purpose of finding out the kinetic characteristic conveniently, the solution of mechanism kinetic simulation based on SimMechanics is studied, the simulation physical model is given, and the simulation is carried out after the setting of all simulation parameters. Compared with the others simulation solutions, its most prominent feature of SimMechanics is that it needn’t establish the mechanism kinematical mathematical model and program, it has the advantage of convenient and the visual modeling function, also has the powerful simulation function. it is a powerful and convenient tool in mechanical system’s analysis and simulation.
Novel Shock-Absorbing Spring Stiffness Changes in Automobile Clutch Driven Plate Application
Authors: Zhang Yun , He Ji Lin , Cai Yan , Liu Zhi Yong , Li Meng Zhu
Published: July 2012

Through the driven disc of automobile clutch damper spring are certain structural improvements, the damping spring stiffness from the original single stage stiffness into three stages stiffness, and with the variations of road condition and load the stiffness change, so as to improve both the ride comfort for passengers and enhancement the car's bearing capacity and reliability.
Effect of Lubricant Viscosity on Gearing Contact Fatigue Life
Authors: Qi Xiu Mei , Gao Chuang Kuan , Zhang Zeng Qiang
Published: July 2012

The paper considers the effect of lubricant viscosity, ν, on the contact fatigue life, N, in gearing applications. More than 40 sets of the thermal non-Newtonian EHL numerical calculations and six sets of disc fatigue tests under the conditions ranging from the mixed to full film lubrication are used. The results show that for improving gearing fatigue life it is generally useful to increase lubricant viscosity. But it is not simply the case that the higher the lubricant viscosity, the better. When lubricant viscosity, ν, is less than a critical value, νcr, a quantitative relation of is seen in the test results; When ν > νcr, however, increasing lubricant viscosity is found to reduce the fatigue life. Based on this result, the paper raises questions concerning the accuracy of the lubrication factor recommended by ISO/6336:1996.
Research on Cutter of Field Straw Chopper Strengthened with Flame Spray Welding
Authors: Li Xiong Zhuang , Hao Jian Jun , Gao Liang , Ma Lu Ping , Ma Yue Jin
Published: July 2012

In order to solve the high-price and short- lifetime problem of the cutter of field straw chopper, wear-resistance coating was prepared on the substrate of 45# steel by flame spray-welding NiWC alloy. By means of orthogonal test and multiple factors variance analysis, The process that the test factors influence the wear-resistance was studied. The technology parameters of flame spray-welding NiWC alloy were optimized as follows: coating matching, 65%Ni60+35%WC; preheat temperature, 450 °C; acetylene flow, 1000 L/h; spraying distance,40 mm.
Study on Applicability of Sound Radiation Characteristics of Thin Finite Length Cylindrical Shells Using Wave Propagation Approach
Authors: Li Bing Ru , Wang Xuan Yin , Ge Hui Liang , Jiang Yue Peng
Published: July 2012

Based on Donnell’s thin shell theory and basic equations, the wave propagation method is discussed here in detail, which is used to investigate the vibration and sound radiation characteristics of thin finite length circular cylindrical shells and ring stiffened shells under various boundary conditions. The effects of boundary conditions, mode truncation, shell’s length, thickness and rings on the acoustic radiation are explored. It is shown that the wave propagation method is more effective for the long cylindrical shell, and the mode truncation can satisfy the calculation accuracy. The conclusion is drawn that the stiffeners have a great influence on the total mechanical impedance while have a slight influence on radiation impedance. The work will give some guidelines for noise reduction of this kind of shell.