bluuebunny/crossref_metadata_2025 huggingface dataset:
Parametric Modeling of Five Typical Cylindrical Shells
Authors: Lu Xiao Yang , Zhao Xiao Wei , Huang Li Li , Li Zheng Hui , Wang Zhi Dan , Wang Chao
Published: January 2012

Based on the geometric characteristics of five typical cylindrical shell structures, a method of the node generation and element connection of the reticulated shell is established in the cylindrical coordinate system. A macro program is designed by using its own Parametric Design Language APDL (ANSYS Parametric Design Language) based on the platform of ANSYS. This five typical cylindrical shell modeling are realized under given parametric conditions such as span, rise high, length and number of grids. It is proved by several examples that this method is simple, efficient and possible. It can be easily used to analysis the internal force and optimize design in shell structures
Wavelet Analysis on Vibration Signal during Unsteady Process
Authors: Liu Yang , Yin Chong Qing
Published: January 2012

Because of the limitation of Fast Fourier Transform(FFT) for the methed of traditional spectrum analysis to analyze the unsteady signal, wavelet analysis are made for the typical unsteady process signal of starting up and shut down with the good characteristic of simultaneous localization in both the time and the frequency domains based on the field test, in which the signal is decomposed into different frequency band, and then the weak signal is caught and the dominant frequency is picked up for the analysis of the vibration source. It proved that the wavelet is a most powerful tool for processing the unsteady signal.
Optimal Design of Basic Parameter of Disconnected Steering Trapezoid
Authors: Guo Cui Xia , Liu Kang , Xie Wen Ling
Published: January 2012

In the design of disconnected steering trapezoid, the Fmincon function of MATLAB optimization toolbox is used to optimize its basic parameters. First, establish the optimal mathematical model. Second, obtain wheel angle curve of inside and outside steering by least-squares fitting. Finally, compare the curve with the ideal Ackerman geometric curve to get the optimization parameters of disconnected steering trapezoid. The example of optimized design validated that the actual curve of deflection angle of the both sides of steering wheel was almost close to perfect Ackerman geometry curve, it ensures the steering of wheel do pure rolling in the common conditions, which reduce tire wear
Kolmogorov Entropy Optimization in the Aeroengine Health Monitoring
Authors: Shi Yong Sheng , Ma Ji , Song Yun Xue
Published: January 2012

Kolmogorov entropy theory was introduced into this paper for time series of one-parameter maximum likelihood estimation of the entropy K, combined with practical applications to aeroengine health monitoring. K entropy value was used to describe the disorder degree of aeroengine parts performance parameters, analyzing the health status and evolutive trend of aeroengine components. Optimization base on K entropy was used to analyze muli-parameter time series trend of K entropy, according to preferred status indicator changes analyzes the overall health of aeroengine. Experimental demonstration on the actual flight data can be more accurately reflected the health of aeroengine,have some significance to fault diagnosis and repair of aeroengine
Design of Industrial LCD Terminal System for Intelligent Image Display
Authors: Fu Xian Cheng , Song Rui , Wen Guo Jun
Published: January 2012

This article discusses that the design technique of LCD terminal system for intelligent image display based on an 89C51 microcontroller. The system includes both hardware and software parts. Hardware part consists of liquid crystal display module, flash memory module and serial communication module; software part includes liquid crystal display programming, reading/writing programming of memory chip, serial communication programming, and host computer software
Construction of Luciferase Reporter Plasmid with Human AQP1 Gene Promoter
Authors: Sun Zhe , Zhang Tong Cun , Jiang Yong
Published: January 2012

Aquaporins (AQPs), a family of water channels, function as a water-selective transporting protein in cell membranes. Aquaporin 1 (AQP1) was first discovered in human erythrocytes as a water channel for high osmotic water permeability. AQP1 promoter is responsible for regulation of its transcription and expression. In this study, molecular biology and genetic engineering knowledge and principles of construction of AQP1 promoter plasmid, and recombinant plasmids were identified and measured for luciferase, for promoter function. Our study successfully constructed AQP1 promoter luciferase reporter gene expression plasmid and successfully carry out the functions of its detection, provides a new foundation for the transcription expression and function regulation of the AQP1
Application of Fuzzy Closeness in Siberian Tiger Skin Texture Recognition
Authors: Chen Jie , Qi Da Wei , Zhang Xiu Juan
Published: January 2012

In order to improve the accuracy of tiger skin texture recognition, a skin texture identification method based on fuzzy closeness is put forward in this paper: four skin texture stripes extracted from a tiger texture image are selected as a research object. The image treatment process is: firstly, connected their endpoints to form three quadrilaterals, then regarded the quadrilateral area, bottom length, and left bottom corner features as the characteristics index of the object, the fuzzy closeness degree derived from the characteristics is compared with the standard models, and the final closeness degree is obtained. Experimental results show that this method can improve the accuracy of tiger skin texture recognition, and identify the tiger skin texture effectively to achieve individual identification of tigers finally.
The Metabolic Capabilities of Two Cells in Enterobacteria
Authors: Zhou Qing Hua , Sun Xiao Dian , Li Yan
Published: January 2012

In this paper, we investigate the metabolic capabilities of two kinds cells belong to enterbacteria. Firstly we develop the mathematical models for Escherichia coli and Buchnera aphidicola Cc based on Flux balance analysis methods. Then we study their capacity of producing the important metabolite Ethanol. Finally, the results show that if the metabolic pathway is more complicated, then more the terminal metabolite-AcCoA is produced.
Microscopic Numerical Simulation of Reinforced Concrete Damage Evolution under Uniaxial Tension and Compression
Authors: Chen Jian Yun , Zhang Ming , Liu Zhi Guang
Published: January 2012

Based on the mesoscopic random aggregate model and brittle-damage constitutive model, the numerical simulations of tension and compression are performed on reinforced concrete, and the thickness method is employed to simulate the interface between steel bar and concrete. Then a series of samples are generated randomly based on Weibull distribution’ mechanical parameters, and these samples are used to investigate meso damage evolution process of reinforced concrete, as well as the impact of parameter selection on macro-strength characterization of reinforced concrete. The results of numerical simulations effectively reveal the accumulation of tensile damage of meso-units, which lead to the failure of reinforced concrete. In conclusion, this research provides an innovative method to investigate the mechanical properties of interface between steel bar and concrete.
Traditional Chinese Medicine Epimedium Release from PLGA/HA Scaffolds Prepared in Supercritical CO2
Authors: Liu Jin Song , Xu Li Hua , Deng Zhen Nan , Wang Si Qian , Ji Xiao Li
Published: January 2012

Traditional chinese medicine epimedium was introduced into the poly(D,L-lactide-co-glycolide) / hydroxyapatite (PLGA/HA) scaffolds by using a supercritical CO2 technique. The morphology, porosity, mechanical strength, degradation behaviors, and drug release kenitics of scaffolds with 1wt%, 5 wt% and 10 wt% of epimedium were determined. The results revealed that the micropores and macropores in the scaffolds were interconnect, and the addition of drug had little effect on the morphology of scaffolds. When the drug was at 10 wt% , the porosity and mechnical strength of scaffolds were deteriorated. The dosage of epimedium in scaffolds exhibits an signficant influence on weight loss of scaffolds and release kenitics of epimedium. Within the limits of our study, 5 wt% epimedium loaded scaffolds might be suitable for bone tissue egineering application.
Effect of Working Parameters on the Damage of Ladder Impact Drill
Authors: Yu Fu Sheng , Wang Xue , Shen Xiao Qin , Dong Mao Qi , Zhang Rong Lu
Published: January 2012

The step face of the large-scale ladder impact drill is easy to generate fracture damage. The unreasonable working parameters are an important factor for the fracture damage in addition to the irrational structure. In this paper, three working parameters consisting of drill impact height, impact frequency and impact stratum for damage are studied from two perspectives of theoretical analysis and finite element analysis.
The Research on Directional Elements of High-Voltage Line Protections Based on Zero-Sequence Reactance of Fault Components
Authors: Zeng Xiao Hui , Chen Yong Hui , Song Hong
Published: January 2012

Zero-sequence directional elements under a small voltage are studied and a new directional element based on zero-sequence reactance of fault components is presented. From analysis and simulations we have that when a forward fault or a reverse fault occurs, the zero-sequence reactance of a fault component will less or larger than the line zero-sequence reactance respectively. Therefore, the direction of a fault can be distinguished. The simulation results of EMTP show that the directional element based on zero-sequence reactance of fault components can identify forward and reverse faults accurately and it can satisfy requirements of relay protections for high-voltage lines.
N-Soliton Solutions for (2+1)-Dimensional Nonlinear Dissipative Zabolotskaya-Khokhlov System
Authors: Li Bang Qing , Wang Cong
Published: January 2012

Applying a symbolic computation algorithm, namely, the improved Hirota bilinear method, a new type of the N-soliton solutions is obtained for the (2+1)-dimensional nonlinear dissipative Zabolotskaya-Khokhlov system. The solutions can be expressed explicitly. Furthermore, the evolution process is investigated for the N-soliton solutions
Analysis and Improvement of Vibration and Noise for Driving Axle
Authors: Shi Wen Ku , Guo Nian Cheng , Yang Wei , Wu Guang Ming , Wang Guo Lin , Zhang Fei
Published: January 2012

Driving axle of a light bus was tested on the bench of transmission system, and the cause of abnormal vibration and noise was analyzed. Some defects were found from the test, such as oversized impact of hyperboloidal gear pair, eccentricity of drive gear shaft, and poor roughness of tooth face. Several improvement measures were put forward and confirmed by bench test. The results indicate that noise reduced greatly, thus the improvement measures are effective and positive
Photocatalytic Activity of TiO2 Coated on HZSM-5 Prepared by Oxalic Acid Treatment
Authors: Zhang Wen Jie , Chen Jin Lei , He Hong Bo
Published: January 2012

Zeolite HZSM-5 was pre-treated by oxalic acid and used as support for TiO2film prepared by sol-gel method. Decoloration rates increased with TiO2concentration both for pure TiO2and TiO2/HZSM-5. Meanwhile, the total decoloration rate on TiO2/HZSM-5 is much higher than using pure TiO2on all TiO2concentrations. Methyl orange degradation on TiO2/HZSM-5 reached its maximum value at TiO2concentration of 600 mg/l. After 120 min of irradiation, decoloration rate on TiO2/HZSM-5 was near 100%, compared with 50% decoloration on pure TiO2. Photocatalytic degradation of methyl orange on both TiO2/HZSM-5 and TiO2follows the equation of first order reaction. Kinetic constant on TiO2/HZSM-5 is k1=0.02663 min-1, which is much higher than that on pure TiO2, k2=0.010154 min-1.
Performance Investigate of Fine Aggregate Size and Content on Asphalt Mastic
Authors: Zhu Zhong Rong , Ye Yong
Published: January 2012

The objective of this study is to investigate and evaluate the compressive strength and creep behavior of fine aggregates on asphalt mastic. The variables that are considered in the study include the size and content of fine aggregates. Eight types of mastic specimens consisting of bitumen with various volume fractions of different kinds of fine aggregates were used. Unixal compression and static creep tests were realized at different loading conditions. The results found that, in general, asphalt mastics made with different aggregate sizes but same volume fraction (64%) have slight difference in compressive strength and creep values. However, those values show significant differences for mastics made with different volume fractions but same aggregate size (between 2.36 and 1.18 mm). Moreover, the asphalt mastic with 64% volume fraction has better deformation resistance.
The Analysis of Wireless Channel in the Workshop of Chemical Water Treatment in Power Plant
Authors: Wang Ren Shu , Bai Yan , Xu Yi Xin , Xu Cheng Yan , Li Qiu Ling
Published: January 2012

As the performance of the wireless sensor networks is sensitive to the environment of the application, the analysis of wireless channel is carried out in the workshop of the chemical water treatment in power plant. With the power of noise and received signals sampled, the path-loss exponent γ is derived to establish the model of the wireless channel. To meet the requirement of the performance of wireless communication, such as a given bit error rate (BER), the upper bound of the distance between transmitter and receiver is also presented. At last, the conclusion is given.
Study of an Inorganic Ion Exchanger Li1.2Zn0.9PO4
Authors: Li Heng
Published: January 2012

New complex inorganic ion exchanger Li1.2Zn0.9PO4is synthesized. Chemical composition, structure and some related properties and complex mechanism of this ion exchanger are investigated by electron microscopic, X-ray diffraction and chemical methods. The ion exchange behavior of Li1.2Zn0.9PO4has been studied in detail. Results of column test indicated, that the exchange capacity obtained from tests for Li+in 0.1mol /L HNO3solution is 6.3mmol/g.
The Synthesis and Ion-Exchange Property of Li+ Memorized Spinel LiZnPO4
Authors: Li Heng
Published: January 2012

Compound [LiZnPO4], a spinel-type metal compound, was prepared by a solid state reaction crystallization method. The experimental results showed that the Li+extraction/insertion be progressed mainly by an ion-exchange mechanism. The acid treated samples had an ion exchange capacity of 4.1 mmol/g for Li+.
A Signal Processing Method for Ground Monitoring System of a Certain Missile’s Guidance Module
Authors: Li Dong Sheng , Fu Wen Xing
Published: January 2012

This paper studies the architecture of the ground monitoring system of a certain missile’s distributive guidance module and discusses in some detail the signal processing methods for controlling the power supply voltage, generating and acquiring the switching values, acquiring the analogue quantity and the image etc. The discussion results show that the electricity of the earth monitoring system can be fully insulated from that of the missile under testing, thus ensuring its safety. The signal processing methods can accurately generate and acquire various types of signal through normalization, adaptation and conditioning, thus being applicable to engineering practices
Preparation of Microbial Flocculant and its Preliminary Application on Removal of Ammonia in Tannery Effluent
Authors: Zhao Chang Qing , Yang Qin Huan , Teng Bo , Chen Wu Yong , Jiang Li , Wang Yan , Deng Si Si
Published: January 2012

The removal of ammonia in tannery effluent was studied elementarily with microbial flocculant in the experiment. Though an orthogonal experiment, the microbial flocculant produced the most by Bacillus cereus when 27°C, pH of 8, incubation time of 48h and the initial ammonia concentration of 1g/100mL; and the mass of microbial flocculant was positive correlated with the growth of the Bacillus cereus. After treating the tannery effluent containing ammonia through the microbial flocculant, it was found that the microbial flocculant had the ability to remove ammonia in tannery effluent. By detecting the removal effect of ammonia in tannery effluent at different pH, the removal ratio was higher under slightly alkaline condition with the microbial flocculant. The experiments may contribute to the application of microbial flocculant to ammonia removal in tannery effluent.
Wetland Plant Landscape Construction of the Ancient Canal Combining Archaic Rhyme with Wild - Taking China Yangzhou Sanwan Wetland Park as a Case
Authors: Zhu Zun Ling , Li Ning
Published: January 2012

In urban wetland ecological system plants are important components, and plant landscape is one of the themes of landscape in the urban wetland and it is even the basic support of wetland ecosystem. The paper takes China Yangzhou Sanwan Wetland Park as a case, starting from maintaining wetland system ecological balance to protecting wetland functions and biodiversity, and realizing the sustainable use of the resources. Based on excavating the culture resources in Yangzhou, it also comprehensively utilizes natural wetland resources, surrounding natural and humanity resources to make a cultural and green plants group. So that we can build an urban wetland ecological system with “rhyme” and “green field”.
A Design Proposal of Integrated PC-Architecture Embedded Control System for Remotely Operated Weapon Station
Authors: Qian Han Ming , Sun Ping , Zhao Hong Tao
Published: January 2012

Modern warfare has led the concept of remotely operated weapon station for increasing force protection while maintaining lethality. There is a need for an efficient embedded control system for certain kind of system. A design proposal of an integrated PC-architecture embedded control system for remotely operated weapon station is presented. The hardware of the system is based on the 486DX2 processor running at 100MHz with coprocessor, which is a Pentium class platform. Hardware/software co-design methods and tools have been discussed after the system configuration is decided. The software design consideration for the control system has been presented according to multi-task programming of VxWorks
Design of Internal Control Risk Management System of Coal Mining Enterprises Based on Systems Engineering
Authors: Hao Su Li , Ding Zhong Xin
Published: January 2012

Coal mining enterprises internal control risk management is a complicated system problem. The paper researched the internal control risk management system of coal mining enterprises by applying the system engineering theory and risk management method. And then the internal control risk management system has been established from internal control risk management process, risk management circle and risk management method. Furthermore, the every subarchitecture and the internal relation have been analyzed. Finally, from the business process of coal mining enterprises, the implementing scheme of internal control risk management has been designed form workers, equipment, environment and management aspects
The Finite Element Analysis and Topology Optimization of Semi-Trailer Frame
Authors: Zhang Wei Chun , Du Xian Bin , Ma Bing Bing , Pei Bao Hao , Chen Jie , Liu Zhong Xi
Published: January 2012

Create the finite element model of the frame in ANSYS, and then apply the corresponding boundary conditions and loads for static analysis under the two typical operating conditions of the bending and twisting. And then identify the part suffered a relatively bigger stress in the frame by analyzing the results to verify whether it meets the requirements of its strength. Finally, make a preliminary topology optimization for the frame
Research of the Sprayed Steel Fiber Concrete Application in Tunnel Construction
Authors: Luo Xian Long , Li Li Zeng , Yin Hui Zeng
Published: January 2012

The spayed concrete is blended with steel fiber,which can improve tensile strength and higher resistance to deformation. This method is applied to support underground chamber surrounded by weak wallrock or chamber bearing great load. this paper accounts for the theory of sprayed steel fiber concrete and its application in tunnelling construction.And aslo, its comprehensive economic effect will be emphasized in comparison with jetting concrete net from the aspects of technology,safety and economy.
Investigation on Shading Effect of Urban Green Space in Summer in Hangzhou
Authors: Wu Wen Ting , Zhao Heng Yu , Ren Yi , Tian Mi Mi , Shen Dan
Published: January 2012

With the accelerating developments of the current urbanization in the world and the increasingly severe environmental problems, the research on ecological service function of urban green spaces has been the frontier subject for the international ecology. The urban green spaces are a special underlying surface, an important composition of the urban natural eco-system. For the urban green spaces, the crowns of the plants can block, absorb and reflect the radiation from the sun to obviously reduce the sunshine penetrating to the ground through the spaces of the leaves, which can reduce torridness and sever sunshine and enhance people’s environmental comfortableness. Hence they are entitled with a significant ecological service function. The research focuses on classifying the shading effect of various urban green spaces in summer in Hangzhou in order to realize the amount situations of shading effect of urban green spaces in summer in Hangzhou and to provide inspiration and reference for elaborately classifying and evaluating service function values of shading effect of ecological service function of urban green spaces
Synthesis of SrTiO3 Nanoparticles by a Simple Sonochemical Method
Authors: Wang Yu Jiang , Yang Lin Lin , Wang Yong Gang
Published: January 2012

SrTiO3 nanoparticles were successfully synthesized by a sonochemical method at room temperature. The as-prepared powders were characterized by X-ray powder diffraction (XRD) and transmission electron microscopy (TEM), and exhibited a pure phase SrTiO3 with a perovskite structure about 20nm in size with uniform and nearly spherical shape. It is found that the size of the obtained nanoparticles increased with prolonging the ultrasonic time.
Research on the Weak Signal Detecting Technique for Crop Water Stress Based on Wavelet Denoising
Authors: Wang Jing Hua , Geng Li Hui , Zhang Cui Min
Published: January 2012

At present, water shortage in agriculture becomes more and more serious. This situation makes it necessary to develop precision irrigation, which needs to obtain the accurate crop water stress in advance. However, this signal is too weak to be detected easily. Wavelet analysis has been widely used in the signal processing area for almost two decades due to its excellent time-frequency analysis ability. Therefore, the wavelet decomposition and reconstruction technique is applied to reduce the noises of experimental data collected from corn plants in a farmland. Finally, data analysis results show that wavelet denoising is effective to achieve the weak signal extraction.
Remote Monitoring System for Aquaculture Based on Ethernet
Authors: Liu Xing Qiao , Liu Zhi
Published: January 2012

Nitrite ion concentration is an important parameter in aquaculture water. To measure nitrite ion in the water environment accurately, the paper proposes nitrite remote monitoring system based on Ethernet. MCU MSP430 is used as the field detection instrument, and ARM9 processor is used to build the Ethernet gateway. Field data can be sent to the gateway from MCU by RS485 bus. Embedded operation system Linux where the TCP/IP stack is transplanted is transplanted to the gateway hardware platform. Based on that web server is constructed on the gateway. So the remote monitoring for nitrite concentration can be achieved through the IE browser
Photoelectrocatalytic Oxidation of Methyl Orange in KCI Solution
Authors: Li Feng Qi , Zhang Wen Jie
Published: January 2012

When potential was less than 1.2 V, electro-degradation rate was not more than 1.2% on both the films prepared using PEG or not. The film prepared with addition of PEG showed better degradation rates in the whole potential range than the film prepared without using of PEG. The highest degradation rates existed at 1.1 V of applied potential for both of the film electrodes, where degradation rate on film with PEG was 93.6% and the rate was 92.2% on the film without PEG. Methyl orange degradation rates increased with increasing KCl concentration from 0 to 0.7 mol/l, while degradation rates dropped down at even higher potential. Degradation rates increased with prolonged irradiation time for both of the two film electrodes.
Effect of Ultra-High Pressure on the Characterization of Ursolic Acid/β-Cyclodextrin Inclusion Complex
Authors: Liu Feng Zhu , Zong Wei
Published: January 2012

To study the characterization of ursolic acid (UA) and β- cyclodextrin(β-CD) inclusion complex which prepared by ultra-high pressure method. Inclusion complex of UA /β-CD was prepared at 100MPa and 500MPa. The inclusion complex was characterized by IR spectra, X-ray diffraction, Differential scanning calorimetry and Scanning electron microscope. It was testified that the inclusion complex was formed between β-CD and UA at ultra-high pressure conditions.
Research of Detection and Control System for Lunar Dust Effects Simulator
Authors: Liao Zhi Rong , Zhou Liang , Gao D. , Zhang X.L. , Yin M.L.
Published: January 2012

To simluate the effects of lunar dust environment veritably by using lunar dust effects simulator, a detection and control system based on singlechip microcomputer was developed. In this system, peripheral circuits with stepper motor driver, temperature sensor and rotary transformer were used to collect the signals and control the temperature as well as speed. Stepper motor speed up/down curve, digital convolution filter and error compensation were adhibited for improving the system accuracy. The results showed that this method was simple, reliable and had high control accuracy.
Research on Electrolysis Manganese Negative Plate Straighten Based on Image Processing
Authors: Zhou Liang , Ren Yan Hai , Pan G.Q. , Chen P.
Published: January 2012

Based on image processing, a new method to straighten the electrolysis plate is proposed. This method uses two CCD cameras to grab images of plate edge and the computer extracts the edge and filters the image. With matrix transformation and calculating of the mechanical model, the motion parameters of the straightening device will be acquired. The straightening device straightens the negative plate as the parameters given. This method can make the curved quantity of electrolysis plate from 80mm down to 2mm or less, achieving an ideal straightening effect.
Study on Machining Distortion of Residual Stress Release
Authors: Chen Jie
Published: January 2012

When machining multi-frame complex components, more than 90% of the materials would be removed, resulting in severe distortion of the parts due to the weakened rigidity and the release of residual stress. This might also lead to stress concentration and damage of the parts. The effect of material removal from residually stressed billet is simulated using FEA software ANSYS, and the causations of distortion is analyzed. To verify the finite element simulation, a high speed milling test on aluminum alloy 7050T7351 is carried out. The results show that the simulation result is consistent with the experimental one. It included that the original residual stress in the blocks of aero-aluminum component is one of key factors to cause machining distortion.
An Improved Method for Acquisition of High-Speed Cutting Zone Temperature Based on Heat Conduction Reverse Seeking
Authors: Xu D.C. , Feng P.F. , Wu Z.J. , Yu D.W.
Published: January 2012

The cutting zone temperature is the basic cutting process physical parameter, how to obtain it accurately is a problem over the years. In the paper, a method combined the artificial thermocouple method with thermal conduction reverse seeking method was proposed. The thermocouple can track the temperature history curve of the tool measured point. Then the tool and cutting process heat conduction models were built up in the ANSYS and AdvantEdge FEM respectively. According to the simulation results, the corresponding relationship between the rake face temperature and the measured point temperature and the shear slip face temperature can be solved. So the first and second deformation zone average temperature was obtained. Shown as the research results, the method proposed in the paper can obtain the small cutting zone temperature effectively. It provides technical support for the study of cutting process deformation and friction behavior.
Milling Process Simulation Based on Quadtree-Array Representation
Authors: Li J.G. , Gao S.D. , Zhao H. , Ding J.
Published: January 2012

Model representation of workpiece in machining process simulation does directly influence on simulation accuracy and efficiency. The algorithm to acquire cutting width and cutting depth based on quadtree-array representation is discussed in this paper. In milling process simulation, workpiece is represented with quadtree-array and the cutting width and cutting depth are predicted real-time. The results of controlled simulation shows that the predicted cutting depth is accordance with that of the designed and the predicted cutting width is close to that of the designed within accuracy of half a discretization interval.
Minute Displacement Measurement with Eddy Current Sensor
Authors: Xu Q.S. , Ai C.S.
Published: January 2012

Typically, eddy current sensor describes the distance by measuring the voltage reflected impedance of the coil. But in some cases, such as the measurement of different materials, the voltage (impedance Z) doesn’t change monotonously which may affect the sensor Measuring range and even the accuracy of the results. So we designed a new structure of eddy current sensor using phase sensitive detection techniques to analysis the impedance of the coil. After the A/D convention of C8051F020 MCU, the signal is analyzed and processed in PC,the displacement of the object is got. The experiment shows that the device has a high accuracy and stability, suitable for the tiny-distance measurement of different materials.
Simulation Research on Dynamic Tribological Systems of Plain Bearing
Authors: Jin Yong Fu
Published: January 2012

The research method of the inner friction and wear characteristics of plain bearing which is mainly conducted currently, is to analyze the all factors that affect the friction and wear of plain bearing from the perspective of wear, and to build friction and wear model, and then to conduct the research on the model. The article establishes the friction and wear dynamics model on base of the tribological systems approach, and on the base of analyzing the internal friction system and inner process of Tribology system of plain bearing. The article conducts the research on the friction and wear characteristics of plain bearings, and studies the relationship between the inner temperature rise and the heat on the base of simulation of the dynamics model. The consistency of the simulation results and academic calculation of the dynamic model proves that the dynamic model, which is established in the article, is correct.
Stability Limits of High-Speed Milling of Thin-Walled Workpiece
Authors: Wang Tong Yue , He Ning , Li Liang
Published: January 2012

In order to control chatter in machining of thin-walled workpieces, the dynamic model of milling od thin-walled workpiece is analyzed based on considering the flexibility of the workpiece and the machine. In high speed milling of 2A12 aluminum alloy, the compensation method based on the modification of inertia effect is proposed and accurate cutting force coefficients are obtained. The machining system is divided into “spindle-cutter” and “workpiece-fixture” two subsystems and the modal parameters of two subsystems are acquired via modal analysis experiments. A method for obtaining the stability lobes is presented by considering the relative movement of both subsystems. Finally, the stability lobes for high speed milling of 2A12 thin-walled workpiece are obtained and compared between considering three kind of modal parameters. The results are verified against cutting tests.
Study on the Life of High Speed Steel Taps with Cryogenic Treatment
Authors: Yan X.G. , Pang S.Q. , Li Y.T. , Liu Z.Q. , Guo H.
Published: January 2012

The influences of various processes of cryogenic treatment, optimization of parameters and prolongation the life of the high speed steel taps have been studied in the paper. Taking W9Mo3Cr4V for an example, the influences of temperature raising and decreasing rate, cryogenic treatment temperature and holding time, times for treatment, temper process and sequence of cryogenic treatment are discussed. Two kinds of cryogenic treatment process that one is before temper and the other is after it are put forward. Process flow is designed according to the process suitability and economy, the reported research results and existent problem. The results show that the life is prolonged after cryogenic treatment and the life is longer if the cryogenic treatment is carried out before tempering. To different material, the quantity of prolonging is different. To 30CrMnTi, 1.43 times of life of the tap is prolonged if the cryogenic treatment is arranged before tempering and only 61% is prolonged after tempering. To 1Cr18Ni9Ti, 1.08 times is prolonged before tempering and only 46% is prolonged after tempering. To 5CrMnMo, 1.65 times is prolonged before tempering and only 89% is prolonged after tempering. Research indicates that after cryogenic treatment, the harder the material is, the better the cutting is.
Surface Integrity Analysis on High Speed End Milling of 7075 Aluminum Alloy
Authors: Cai X.J. , Ming Wei Wei , Chen Ming
Published: January 2012

Surface integrity is a significant issue concerning machined part quality, especially for aluminum milling process in aerospace manufacturing. This paper gave an intensive analysis on surface integrity in high speed milling of 7075-T651 aluminum alloy, and the relationships of surface topography, surface roughness and residual stress profile with cutting speed at high levels were discussed and some basic aspects concerning surface integrity in high speed end milling of aluminum parts were presented.
Surface Residual Stress Analysis Based on the Molecular Dynamics on Micro/Nano Scale
Authors: Ying Zhu , Zhou L. , Gao D.Y.
Published: January 2012

The molecular dynamics simulation and experimental study of residual stress were carried out on micro/nano scale. The relationship between residual stress and hardness was researched by the simulation for nano-indentation process of single crystal cooper. It was showed that load-displacement curve above reference state when single crystal copper surface exists compressive residual stress,and the existence of tensile residual stress is below reference state. Then the phenomenon was analyzed and gave a reasonable explanation. In addition, the regression analysis of relationship between micro/nano-hardness and residual stress was carried out.
The Composite Tool Design Technologies of Aircraft Composite Parts in Autoclave Forming
Authors: Li Ying Guang , Fu C.Y. , Li D.S. , Wan S.M.
Published: January 2012

Aiming at the problems of composites of anisotropic, poor in dimensional and uneven temperature field in the designing of composite tool in autoclave, the techniques of designing the composite tool of aircraft components were constructed, involving in the following aspects: Taking advantage of design flexibility of composites, the thermal expansion coefficient between the moulding board and composite components matched. By analyzing the cure process curve of fiber-reinforced composites, the result that the crisis point without stress between component and tool, which the shape of composite component decided was concluded. By the temperature field analysis, and contrasted with the experimental results, the maximum difference was 4.95°C，after analysis, optimized the structure of the tool, obtaining the relatively uniform temperature field of the board.
A Process Equipment Networked Service Platform Based on SOA
Authors: Guo Hong , Pang S.Q. , Yan X.G. , Li J.W. , Liu Z.
Published: January 2012

In order to shorten manufacturing preparation time with making full use of web resource, a process equipment networked service platform (PENSP) based on SOA is proposed in the paper. At the same time, it is believed that this paper is helpful to build up a service-oriented enterprise (SOE). A novel classification of process equipment information management is put forward, namely, information service and knowledge service. Besides, public service is to support the safety of PENSP. Graphic elements (including point, line, circle, square and etc.) are described with XML in order to make it possible for heterogeneous drawing software to exchange data. At last, service granularity is discussed.
Modeling and Simulation of Nonlinear Networked Control System Based on Fuzzy Control
Authors: Song Sheng Li , Chen Y. , Huang S.J. , Yang L.H , He R.
Published: January 2012

In the nonlinear networked control system (NCS), the conventional control method is difficult to achieve good control performance, due to the nonlinear problem associated with the disturbance factors, such as network induced time delay and data packet dropout. Considering this situation, this paper is aimed to propose a nonlinear networked control system based on T-S fuzzy model, which does not rely on specific network parameters or mathematical model. The nonlinear problem and the uncertainties of network can be both processed by the designed fuzzy controller. Then this approach is applied to nonlinear motor servo system, simulation of the example model is implemented in Matlab/Simulink associated with True Time toolbox. The results show that the proposed method not only is convenient for modeling, but also upgrade the performance of control system.
The Research of CNC Grinder System with Online Detection
Authors: Xu Qing Song , Ai Chang Sheng
Published: January 2012

Analyses the main methods of on-line detection technology in CNC system, and puts forward a method based on eddy current sensor. Because of the grinder’s special structure that different from the lathe’s, fixed the detection device on the Z axis with the cutter, which was proved available. Designed a new sensor structure and using impedance to analyze the signal and process, the experiments show that it has a high precision relatively. Programmed PC software in VB, through G code compiler, the PC can detect and control the system synchronously in the form of motion control card.
Formation of Cutting Direction Burr/Fracture in Orthogonal Cutting
Authors: Qu Hai Jun , Wang Gui Cheng , Zhu Y.M , Shen Q.X
Published: January 2012

Cutting direction burr/fracture is one of the important factors that influence the edge quality and performance of precision parts. A finite element model based on material failure mode is developed in this study to simulate the burr /fracture forming process. According to workpiece materials deformation and mechanical properties from the simulation results, the cutting direction burr/fracture formation process is analyzed. The cutting direction burr forms when there is a crack in the area near the tool tip and grow along the principal shear zone, the cutting direction fracture forms as the crack grow along negative zone.
Research Progress of Co-Pyrolysis of Waste Plastics Contained Chlorine with Biomass
Authors: Han Bin , Feng Wei
Published: January 2012

The recent progress of co-pyrolysis of waste plastics contained chlorine or PVC with biomass was introduced. Different type raw materials of plastics and biomass, the experiments and facilities were presented. The characteristics of co-pyrolysis, the mechanism of reactions and kinetics studies were summarized, also. The development and prospect of this environmentally friendly wastes reclamation were proposed.
Surfactant-Templated Synthesis and Magnetic Properties of Ordered Nanostructured Fe3O4
Authors: Ji Xiu Jie , Wang Bin , Liu Chao , Cheng Bo Wen , Song Jun , Ma Dong Xia , Zhang Guo Feng , Li Bo Wei , Yang Zhi Xiong , Fang Zhi Yong
Published: January 2012

Surfactant-templated synthesis of ordered nanostructured materials attracts more and more attention. In this paper, ordered nanostructured Fe3O4powder was synthesized via a facile reflux method in ethanol-water media using sodium dodecyl sulphonate (SDS, C12H25SO3Na) as template. XRD and VSM were used to characterize the ordered nanostructure, inorganic phase and magnetic properties. Results show that Fe3O4powder is of an ordered nanostructure of 7.6 nm which was detected by SAXRD and the inorganic phase is composed of cubic Fe3O4nanocrystals. VSM analysis shows that the ordered nanostructured Fe3O4exhibits a two-phase structure and a soft magnetic property with a saturation magnetization of 40emu/g.
Applications of Tourmaline in Catalysis
Authors: Liu Ying , Xue Gang , Liang Jin Sheng , Ding Yan
Published: January 2012

The main properties of tourmaline are far infrared radiation, spontaneous polarization, widely used in the fields of saving energy and environment. Tourmaline as catalyst have extensive applications in the fields of environmental protection, fuel combustion, air purification, printing, deodorant, antibacterial, as well as wastewater treatment of dyeing and aquaculture.
The Review on Project Management of Wood Carbon Sequestration Materials
Authors: Cui Yu Shu , Shao Hong Ling , Ma Li Yan
Published: January 2012

The forest carbon sinks play an important role in controlling the Greenhouse Gas emissions. The project management of wood carbon sequestration materials will be helpful to attract more and more enterprises to step into forestation, reforestation and technology development for improvement of forest management. That will create a sustainable situation that governments, NGO and corporations join together. Based on the domestic and foreign literature, the paper sorts out the current literature in the direction of forest carbon sequestration managements are from five aspects such as, carbon policy, carbon sequestration, carbon conservation, carbon substitution, carbon benefits. Based on this, the paper puts forward the policy and the long-term objectives of wood carbon sequestration materials should be integration of the implementation.
Influence of Water Activated by Ceramic on Growth of Epidermal Cells of Newborn Mice
Authors: Zhang Dong Mei , Liang Jin Sheng , Ding Yan , Mu Xi , Wang Lei
Published: January 2012

The effect of activated water on the growth of epidermal cells of newborn mice is studied by cell culture in vitro. To investigate the influence of activated water on the growth of cells, parameters of water are measured. Then, biological mechanism about how the water effects on cells is discussed. It shows that activated water has the promoter action to growth of cells comparing with non-activated water by detecting optical density (OD) at 570 nm with the MTT colorimetry. Statistically, the probability P, less than 0.01, is obvious. We believe that water cluster has become smaller and small water clusters are beneficial for transporting nutrients.
Analysis of Influencing Factors on Performance of Cis-1,4poly-Butadiene Rubber Containing Modified Attapulgite
Authors: Wu Xiang Xin , Zhang Fu Qiang , Li Peng , Wang Fei , Liang Jin Sheng , Tang Qing Guo
Published: January 2012

Cis-1,4poly-butadiene rubber (BR) is an unself-reinforce rubber. The tensile strength of BR is low. We study the factors that affect the capability of surface treatment attapugite/BR (OAT/BR). The factors include the kind of accelerant, the proportion of accelerant, the quantity of accelerant, the quantity of sulphur, etc. The result proves that the accelerant of CBS (CZ), TMTD, and TBBS (NS) can improve the capability of OAT/BR effectively. When the proportion of CZ and TMTD is 0.75 to 1.25, the quantity of accelerant is 3, the quantity of sulphur is 1.8, and the tensile strength of OAT/BR can reach 12.5MPa.
Fatigue Crack Initiation and Growth Behavior of 7475 Aluminium Alloy in Air and Aggressive Environment
Authors: Verma B.B. , Mallik M. , Atkinson J.D. , Ray P.K.
Published: January 2012

Present investigation is devoted to study the effects of aqueous solution of 3.5% NaCl on high-cycle stress life and fatigue crack growth behavior of 7475-T7351 alloy. At low alternating stress the environment test exhibited corrosion pit dominated crack initiation and at high stress level crack initiation occurred through anodic dissolution. Corrosive environment resulted reduction in fatigue life, crack growth rate enhancement and drop in stage-I to stage-II transition. The behavior is explained with the help of fractographic observations.
Research on Variable Metric Chaos Optimization Modeling for the Prediction of Wastewater Treatment Plants Performance
Authors: Fu Guo Kai , Hu Yi Yue , Zhang Zhi
Published: January 2012

A reliable model for any wastewater treatment plant is essential in order to provide a tool for predicting its performance and to form a basis for controlling the operation of the process. This would minimize the operation costs and assess the stability of environmental balance. For the multi-variable, uncertainty, non-linear characteristics of the wastewater treatment system, a variable metric chaos optimization neural network (VMCNW) prediction model is established standing on the actual operation data in the wasterwater treatment system. The model overcomes several disadvantages of the conventional BP neural network. Namely:slow convergence, low accuracy and difficulty in finding the global optimum.The results of model calculation show that the predicted value can better match measured value,played a effect of simulating and predicting and be able to optimize the operation status. The establishment of the predicting model provide a simple and practical way for the operation and management in wastewater treatment plant,and have good research and engineering practical value.
Influence of Microwave Plasma Nitriding on Hemocompatibility of Biomedical Stainless Steels
Authors: Liu Chung Ming , Chiang Hsi Jen , Ou Keng Liang , Yu Chih Hua
Published: January 2012

During nitriding treatment between 350°C and 550°C, the phase transformation sequence on the nitrided layers of the alloys was found to be γ → (γ + γN) → (γ + α+ CrN). The hemocompatibility test demonstrated the nitrided layer processed the excellent hemocompatibility properties. These results could be useful in further understanding the clinical mechanismsof thenitrided alloys, to develop as a potential biomedical material.
The Hydraulic Anti-Skid System of an Electric Pallet Truck
Authors: Li Guo Ping , Shu Li Sheng , Wang Lu Wei
Published: January 2012

Aiming to avoid the skidding of a moving electric pallet truck, a new anti-skid method was proposed in this paper, which changes the proportion of enduring pressure between the driving wheel and trundles of the electric pallet truck. And a hydraulic anti-skid system was built up according to this method. Based on the theoretical analysis of the hydraulic anti-skid system, simulations were carried out by using AMESim and Matlab/Simulink software, and the anti-skid experiments were implemented. The results of simulations and experiments all show that the designed hydraulic anti-skid system can prevent trucks from slipping and can realize accurate and real-time anti-skid control.