bluuebunny/crossref_metadata_2025 huggingface dataset:
The Analysis of Tool Key Technology in High Speed Machining
Authors: Zhou Chun Jiang , Zou Jing Qiao
Published: May 2011

High speed machining is one of the advanced manufacturing technologies which have developed quickly in recent years. Tool technology is key factor which will make influence to the efficiency and precision of HSM. The paper has analysis the HSM tool technology in terms of material, shank structure and tool balance. It brings forward that tool material with high property must match with workpiece to get high efficiency and precision in HSM. Three type of shank are introduced and using HSK can get better working performance due to its double-surface positioning and short tapered shank. The paper finally put forward the online balancing test technology which can achieves the actual signal collection of dynamic balance, and make technical analysis as well as processing in high-speed cutting.
Development and Slope-Mowing Application of LD-1300 Crawler Mower
Authors: Li Qin Gan , Zhao Yu Kun , Qian Wan Jun
Published: May 2011

For large-area slope turf nursing, existing self-propelled mower is unsuitable to operate on slope while hand-propelled or backpack mower works with intensive labor and low efficiency. The development of LD-1300 crawler mower resolves this problem: being supported with articulated suspension, the generator set is vertical automatically relying on gravitation, at this rate it is suitable to operate on any slope; crawler traveling mechinanics can work for a long distance and climb up abrupt slope; adjustable knife suits grass of different height; suspended knife can be upturned, for convenience of the mower to move and turn; knife protection cover and floating wheel can protect the knife and people and livestock around; retractable lever at both sides of the mower will protect the mower from side flip. Compared with backpack mower, the efficiency of crawler mower is 2.4 times higher and the cost is nearly half. While it can work in high quality and efficiency with low cost, the crawler mower is economical and can be extended in relevant field.
The Development of Metal Injection Moulding for ZK60 Magnesium Alloy Using Palm Stearin Based Binder System
Authors: Harun M.R. , Muhamad N. , Sulong A.B. , Mohamad Nor N.H. , Jamaludin K.R.
Published: May 2011

In this paper, the development of green compact of ZK60 magnesium alloy was studied in the context of MIM using screw type injection moulding machine model Battenfeld BA250CDC. The MIM feedstock used was 64 vol.% powder loading and the balance was palm stearin and low linear density polyethylene with the fraction of 60/40 by weight percent. The injection moulding parameters were then adjusted until the optimal condition of green part was accomplished. Results indicate that the feedstock exhibited good workability when injection moulded at the temperature of 190°C, injection pressure of 900kN, flow rate of 15,5cm3/s and with a very low ejection parameters. This technique provides an additional means to manufacture magnesium alloy components for a wide variety of applications.
Path Selection Methods with Multiple Impairment Constraints Based on Flooding Approach in Transparent Optical Networks
Authors: Wang Li Rong
Published: May 2011

Set out from the evolution of optical network to all optical transparent frame,this paper analyzes the major physical impairments in transparent optical network and their constraints on route selection. A novel impairment-aware routing and wavelength assignment algorithm based on flooding path information message is proposed.
Simulation of High-Speed Cutting Process Based on ABAQUS
Authors: Yu Xia , Sun Xu Yao , Wei Dan Ke
Published: May 2011

Using the separation line technology, established a FE model of two-dimensional cutting process for AISI4340 steel and discussed some basic theory and pivotal questions associated with the simulation of cutting process including the Johnson-Cook material model, the contact model between tool and chip, criteria of chip separation and so on. In order to study the impact of tool rake angle on the chip morphology and the cutting forces, the high-speed cutting process for AISI 4340 steel was simulated based on ABAQUS software. Also, analyzed the influence of mesh azimuth on the chip morphology and its temperature distribution.
Multi-Discipline Knowledge Acquiring Model in Collaborative Design of Complicated Products Based on Polychromatic Sets
Authors: Zhang Guo Hai
Published: May 2011

This paper presents a new model of multi-discipline knowledge reasoning for collaborative design. The main contributions of this study can be focused on three points: The first is to clarify the concepts and contents of the polychromatic sets and polychromatic graph. The second is to put forward the knowledge reasoning model for multi-discipline knowledge based on polychromatic sets. Finally, the mathematical solutions for contour matrix, the causal relationship between the adjacent and the same knowledge patterns are given.
Porous TiO2 Film Electrode Used for Photoelectrocatalytic Degradation of Methyl Orange in NaHCO3 Solution
Authors: Zhang Wen Jie , Li Ke Xin
Published: May 2011

PEG1000 was used as template to prepare porous TiO2 film by sol-gel method. The functions of applied potential and concentration of NaHCO3 to the photoelectrocatalytic degradation of methyl orange on porous and smooth TiO2 films were investigated. Methyl orange degradation rate has two optimal values at the applied potential of 0.8 V and 1.8 V. The addition of PEG may have negative effect on photoelectrocatalytic activity of TiO2 film. The degradation rate increases with increasing NaHCO3 concentration from 0 up to 0.05 mol/l, and then it declines after further increase of electrolyte concentration. After 100 min of reaction, the degradation rates on the films prepared without and with PEG addition are 63.78% and 65.22%, respectively.
The Study on the Optimal Design of the Toroidal Worm-Gearing
Authors: Xu Hua , Wen Qing Ming , Zhou Liang Yong , Zhong Guo An
Published: May 2011

The optimal design of the toroidal worm plays a key role on its performance. The paper analyses the optimal design of the toroidal worm in detail, then points out the design rule of the toroidal worm and the key point of the optimal design. At the same time the program is also built on the optimal design. Based on the program, the optimization of the modification parameters of toroidal worm-gearing is solved.
Carbon Fiber Mechanical Properties Analysis of Wood Composite Board Based on Finite Element Analysis
Authors: Zhu Liang Kuan , Shi Guang Wei , Sun Li Ping
Published: May 2011

In this paper, the carbon fiber mechanical properties of wood composite board were discussed. The microscopic structure of the composite material was analyzed based on finite element method. A unit cell model was established, and element stiffness matrix of the model was developed. The model was used to predict the mechanical properties with feasible and accurate affects. The results of experiment showed that after carbon fiber being mixed, the MOE, the MOR and the IB of medium density fiberboard was significantly improved.
The Self-Catalytic Role of Zirconium N-Propoxide in Sol-Gel Syntheses of ZrO2/Y2O3-CeO2 Compound Powders
Authors: Yi Zhong Zhou , Wang Bo , Zhai Feng Rui , Xie Zhi Peng
Published: May 2011

The self-catalytic role of zirconium n-propoxide has been investigated with respect to the synthetic parameters of ZrO2/Y2O3-CeO2compound powders. When zirconium n-propoxide is prehydrolyzed, the gelation time is prolonged, resulting in a more transparent gel. It is found that gelation time can be shortened with a high concentration of tetraethoxysilane in the presence of a small amount of zirconium n-propoxide. On the basis of the synthetic data, a mechanism for the zirconium n-propoxide catalytic reactions has been discussed. A linear correlation between the mixing level and metal content holds up to 45 mol% of ZrO2/Y2O3under the studied conditions.
A Study of Operable 3-D Virtual Laboratory
Authors: Dai Su Mei , Jia Rui Qing
Published: May 2011

In this work an interactive teaching tool related to the operable virtual 3-D laboratory has being presented. Though defining the lighting and material, and rendering the scene environment, a remarkable virtual laboratory appears as 3-D figures. As well as combining the ramble, animation and interactivity with the 3-D model, a realistic feel of the experiment presents to us. Data information combine with 3-D model achieve a realistic feel of the experiment and to enhance the students’ understanding of some complex concepts. Based on the virtual laboratory model, a group of experiments are developed, including wind tunnel, a Bernoulli equation rig and a stream line rig, etc.
The Method of Attribute Reduction Based on Decision Tree
Authors: Li Fa Chao , Yin Hong Ze , Guan Fei
Published: May 2011

This paper is for refining database in the data mining process. Based on the analysis of the features and disadvantages of this decision tree algorithm and the substantive characteristics of data mining, we propose the concept of the core samples set and prove its invariance. On this basis, we build an attribute reduction method based on decision tree algorithm and then give a specific implementation steps, further, combined with a specific instance analyze the characteristics and efficiency of the method. Results show that the attribute reduction method based on the decision tree has good maneuverability and explicableness. This method can simply realize the attribute reduction of information system and its basic ideas completely adapt to the attribute reduction problems of the uncertain environment.
Style Design of Men’s Pants and Programming Realization
Authors: Gu Bing Fei , Kong Hai Yan , Su Jun Qiang , Liu Guo Lian
Published: May 2011

In the developing of 2D non-contact anthropometry and application system, automatic pattern generation of men’s pants system is important component. Styles of men’s pants are single, and can be devised simply. In this paper, 6 kinds of devised styles are summarized by observing styles of men’s pants, which divide into landscape orientation, lengthways orientation and slant segmentation all included straight line and curve. After the users enter into automatic pattern generation of men’s pants system, they can choose devised style in the interface of design, and then related pattern can be automatically generated in the interface of pattern. In this paper, VS software is used to make programming, ganged style of pants in human body is realized by MATLAB, so the pattern can be automatically generated according to the rules of pattern and devised styles. This study provides the basis for automatic pattern generation of men’s pants system.
Preparation Conditions on Adsorption and Photocatalytic Activity of TiO2 Particles Prepared by Sol-Gel Method
Authors: Zhang Wen Jie , Yu Yang
Published: May 2011

The amounts of ethanol, HCl and H2O, and also calcination conditions during sol-gel process of preparing TiO2 photocatalyst were investigated. Methyl orange adsorption on TiO2 prepared using different sol compositions is not more than 4% by varying the amount of ethanol, HCl and H2O. The photocatalytic degradation is related to sol composition, and the optimal composition is composed of 10 ml ethanol, 1.0 ml H2O, and 0.1 ml HCl. Calcination temperature and time are also important in TiO2 preparation. The TiO2 particle prepared at 500 °C for 3 h has the optimal photocatalytic activity. In the irradiation time range up to 100 min, photocatalytic degradation rate constantly increases up to 94.2%.
A Material Model with Softening Effect Considered
Authors: Fu Ming Juan , Zhou Hai Tao , Duan Bao Jun
Published: May 2011

Precise analysis on large-span spatial structures depends on accurate numerical material constitutive model, According to the axial tension stress-strain curve, the paper proposes a new numerical multiline material model, with material effects of intenerating effect, material hardening effect and damage effects considered, and corresponding calculation method applicable to beam element. Simulation of axial tension test and bi-level loading test on cantilever column proves that the material model and algorithm are effective and correct.
Sustainable Teaching and Innovation for Zero Waste
Authors: Zhu Song , Kralj Davorin
Published: May 2011

The contribution focuses on teaching and innovation for Sustainable development. Teaching the theory on the basis of the practical experiences envisages sustainable development planning as a process of continuous improvement. The article shows an optimization of recycling of concrete from lightweight aggregates containing expanded glass and hard rubber. The purpose of this work was to produce the new combination using rest, construction waste of concrete from lightweight aggregates and hard rubber and new raw components of concrete from lightweight aggregates, as key reactive material.
Review on Statistical Based Methods of Measuring the Water Pipes Reliability
Authors: Bubtiena Abdelwahab M. , El Shafei Ahmed H. , Jafaar Othman
Published: May 2011

This article attempts to provide a general review on the most widely used prediction modeling of pipes breakage and reliability. The intention of this review is to lay the historical improvement stages of this topic, to identify the previous challenges faced the researchers, to identify the malfunctions of the methods and techniques, and clarifying the limits of each technique. In addition, how the researchers could overcome the malfunctions and what are the deficiencies identified so that solutions can be suggested.
Effect of Restraint Condition on the Thermal Stress in the Bonded Single Lap Joint
Authors: Chen Cun Jun , You Min , Yu Hai Zhou , Li Jian Li , Mei Chun Zhi
Published: May 2011

The temperature field in the adhesively bonded single lap steel joint after a thermal shock (100 °C, 10s) and the influence of the restraint on the thermal stress in the joint was investigated using elasto-plastic finite element method (FEM). The results showed that the temperature in the overlap region is symmetrically distributed to the bondline after the thermal shock. Five kinds of constraints were applied in the study and it is found that the peak value of the thermal stresses were occurred at the points near the free ends of the adherend lap zone along the mid-bondline under the action of constraining the adherends in the direction of both transversal and longitudinal. The symbol of the longitudinal stress Sx and peel stress Sy is negative.
Analysis on Impacts of Construction Technology on Bearing Capacity of Grouting Piles
Authors: Nie Chun Long , Fu He Lin
Published: May 2011

Different construction technologies of grouting piles bring different properties of interfaces of pile-soil thus influencing bearing capacity. In this paper, theoretical calculations can be done with the values of , and considered to determine impacts of construction technology on bearing capacity of grouting piles. At the same time, side resistance and bottom resistance of piles is discussed though the pore forming method of non-compaction, part compaction and compaction.
Rainfall-Induced Slope Instability Rock Mixture Fluid - Structure Interaction Numerical Simulation
Authors: She Xiao Nian , Fu He Lin , Zhou Zhong
Published: May 2011

In this paper, did the numerical calculation of the mixture slope’s development and changes of the stress field, seepage field ,displacement field under fluid - solid coupling effects at different levels, researching and analyzing the water-rock interaction mechanisms of the mixture slope ,and based on strength reduction , calculated the slope safety factor at different water levels, revealed the failure mechanisms of a mixture of earth and rock slope when it considers the rainfall.
Study on Application of Time Domain Reflectometry to Highway Slope Monitoring
Authors: Lu Wen Bin , Fu He Lin , Tan Han Hua
Published: May 2011

To apply Time Domain Reflectometry (TDR) in slope monitoring, on the base of brief summary of principle of TDR, and with types of indoor shear tests and situ construction of different cables, reflection waves of types of different cables are studied. Compared with the monitor results by TDR and oblique monitoring result by drilling hole, the following conclusions can be gained, i.e. TDR can be fast applied in determining the sliding plane, more economical, safety, and precisely. By the research results, to satisfy different monitoring goal, the application rules of types of TDR is put forward , and TDR is a very useful tool for slope survey.
A Fast Algorithm to Choose Delay Time for Strange Attractors
Authors: Yao Peng , Chen Gai Rong , Xu Shao Hong
Published: May 2011

According to pseudo-periodicity and ergodicity of chaotic systems, we put forward a fast algorithm to determine delay time in phase state reconstruction. The traditional method to calculate mutual information is time-consuming and complicated to realize, which greatly restricts its application. In our algorithm we gradually reduce the feasible computing interval and adjust the calculating step until satisfactory result is gotten. This method overcomes the tedious calculation of mutual information and meanwhile guarantees high precision. Finally the simulation results of Rössler and Lorenz systems verify the feasibility of our algorithm.
The Multiple Implied Overlay Tree P2P Progressive Transmission Method of Mixed Subdivision Mesh
Authors: Shi Zhuo , Yu Ke
Published: May 2011

This paper presents a progressive transmission method of mixed subdivision mesh based on multiple implied overlay tree P2P network. Peer-to-Peer networks are widely used in media transmission because of its excellent network scalability. Scalable media service, especially mixed subdivision mesh is proposed to adapt to different terminal processing abilities. For stratified characteristics of progressive mesh, we use multiple implied tree cover P2P technology to transmit 3D mesh of mixed subdivision model. It effectively realizes to reduce MAX, average system load link and lower the average Relative delay penalty. Finally a complete set of solution is given, which is proved to be an effective method by simulation experiment.
Studying on the Magnetorheological Fluids and its Rheometer
Authors: Chen Bing San , Jiang Ji Bin , Zhang Fu Jiang
Published: May 2011

This paper presents a magnetorheological(MR) rheometer which consists of a pair of rotating parallel disc, step motor, the signal collecting device, computer software for dynamic analysis etc.. In order to assess the performance of the MR rheometer, high-order spectrum analysis tools are used. The theoretical and experimental results indicate that the rheometer is useful to test the dynamic charicteristics of the MR fluids and the high-order analysis might be helpful to describe MR rheometer dynamic characteristics. The measurement and analysis process based on virtual instruments are automatically controlled by computer in this paper.
Improvement of the 1880 Slab Sizing Press Pinch Rolls
Authors: Liu Cai , Li Jun Hui
Published: May 2011

The back group of the pinch rolls of the 1880 Slab Size Press are wearing away seriously in some domestic steel mill, so based on the finite element software a sizing press mode1 is established. The major reason of the back pinch rolls wearing away is the partly contact between the rolls and the “dog-bone” of the pressed slab. The work condition of the new bank group of the pinch rolls is greatly improved in the production line and the cost of production is saved.
The Application of CBR in Stone Equipment Variant Design
Authors: Wang Jing Kun , Li Jian Jun , Zhang Jin Sheng , Ai Xing
Published: May 2011

This paper studies the application of CBR (case-based reasoning) in stone equipments variant design. As the actual design process and CBR process have collateral corresponding relation, CBR accords with the actual design process of deviser. The basic resolution model of variant design is established, and the instance of products variant design is presented. With the application of variant design principle, the design intensity will be lightened, and the design time will be shortened. Therefore the variant design accommodates the requirement of products diversification and client orientation.
Microstructure Characterization of Hot Deformed Fe-32%Ni Alloy
Authors: Han Bao Jun
Published: May 2011

Hot deformation behavior and microstructure evolution of Fe-32%Ni alloy were investigated when compressed at the temperature of 1000°C and a strain rate of 2×10-3s-1. The microstructures were analyzed using optical microscope (OM), electron back scatter diffraction (EBSD) and transmission electron microscope (TEM). The results show that the generation and development of dynamic recrystallization (DRX) can obviously refine the grains of Fe-32Ni% alloy and the DRX reached dynamic equilibrium when the strain was high. According to the TEM observations, the DRX microstructure can be categorized into three kinds: grains with low dislocation density, which are DRX nucleations; grains with low dislocation density around the grain boundary and high dislocation density in its interior which means that grains with dislocation density gradient and which are DRX grains in growth; grains with high dislocation density, which are fully work-hardened DRX grains.
Study on Low-Alloy Coupled Steel Technological Applications
Authors: Gao Bing , Wang Bo , Zou Jian Qi
Published: May 2011

Low-alloy steel coupled steel bars is formed to ladder-framework by two parallel cold-drawn that’s they are longitudinal reinforcement wedding with short and band cold-drawn that’s low-carbon steel are transverse reinforcement. In this paper, study on its mechanical and technology properties. So, get suggestion model calculating formulas of crack width and stiffness are presented. The advantages of cooperating between coupled steel bars and concrete have been primarily accepted.
Design and Application of Multi-Well Automatic Metering and Remote Monitoring System
Authors: Zheng Gang , Wu Na , Sun Shu Wen , Hu Shou Qiang , Wang Xin Hua
Published: May 2011

A PLC-based multi-well automatic metering and remote monitoring system has been developed to improve metering accuracy, realize multi-well continuous metering and meet the needs of remote monitoring. A three-level management mode consisting of metering station, oil production crew and oil production plant is built. The metering station is used to control the metering order, monitor the working condition of oil wells and upload metering data to oil production crew through wireless module; the oil production crew is used to receive the instantaneous data from the metering station and upload the statistical data to the server in the oil production plant; the oil production plant is used to browse and manage the data from every oil production crew through internet and the website of oil field data management system has been developed based on B/S frame. Field test shows that this system can accurately meter and analyze oil production data, generate needed reports and graphs with the functions of automatic metering, remote transmission, data analysis and queries.
Influence of Manufacturing Errors on Performance of Optical Power Splitter
Authors: Mohammad Syuhaimi Ab.Rahman , Ater Foze Saleh , Mohammad Rahamah
Published: May 2011

In this paper, the effect of manufacturing errors (MEs) on the performance of 1×2 optical power splitter is investigated in details. The ME, which is assumed to take regular shape, is considered in each section of the device. Simulation result shows that ME has a significant effect on the output power especially when it occurs in S-bends.
A New Type Auto-Reclaim Facility of Boiler Exhaust Steam Heat Energy
Authors: Jiang Pei , He Guang Jin , Yang Gao Li
Published: May 2011

There is so much exhaust steam in a boiler system that it causes great heat energy waste. A new type auto-reclaim facility of boiler exhaust steam heat energy is designed based on hydrokinetics, pyrology and automation. The new type facility is made up of water-gas injection pump, liquid relay deoxidization tank, field electrical control cabinet, instrument cabinet, loop booster pump and remote consoler. When the facility is used in the boiler system, not only can it reclaim the exhaust steam heat energy but also the whole steam and working medium. The facility is of high reliability under intelligent control and mechanism architecture. The facility has been applied in more than thirty China Petrochemical manufactories. This patent facility receives the high praise in the field of boiler steam heat energy reclaim.
Fuzzy Control-Based Air-Compressor Constant Pressure Gas Intelligent Control
Authors: Li Gong Fa , Xu Si Qiang , Wang Jin Hui , Yang Jin Tang , Kong Jian Yi , Jiang Guo Zhang , Xie Liang Xi
Published: May 2011

The air compressor system is a time-varying, delay and nonlinear complex system, it has a very important sense to ensure that the supply pressure is stable in the compressor control system. According to the working characteristic of air compressor system, the fuzzy control theory, as one of the modern control theories, was applied into the constant pressure control system to design a fuzzy pressure controller. The simulation results show that the controller was more convenient and effective; it has certain directive significance and reference for the other parameter’s control of air compressor system.
Application of ANN and SVM for Uncertainty Quantification and Propagation
Authors: He Qin Shu , Xiao Shi Fu , Liu Xin En
Published: May 2011

All measurements have error that obscures the true value. The error creates uncertainty about the quality of the measured value, which is requiring testing and calibration laboratories to provide estimates of uncertainty with their measurements. Measurement uncertainties include input uncertainty, the propagation of input uncertainty, the output uncertainty and the systematic error uncertainty. Several methods for estimating the uncertainty of measurements have been introduced for different kinds of uncertainty quantification, and two data mining methodologies-Artificial Neural Network (ANN) and Support Vector Machine (SVM) are used to build the unknown propagation model. This paper will discuss the quantification of measurement uncertainty (MU) and the separation of various uncertainty sources to MU and will discuss the advantages and limitations of SVM and ANN for building the propagation model of MU.
Numerical Analysis Method and Bifurcation of Gas-Lubricated Journal Bearing-Rotor System with Gyroscopic Effect
Authors: Zhang Yong Fang , Shi Xiao Lei , Lu Yan Jun , Yu Lie
Published: May 2011

Based on the nonlinear theory, the unbalanced responses of the gas-lubricated journal bearing-rotor system are investigated. A time-dependent mathematical model is established to describe the pressure distribution of gas-lubricated journal bearing with nonlinearity. The rigid rotor with gyroscopic effect supported by self-acting gas journal bearing with three axial grooves is modeled. The differential transformation method is employed to solve the time-dependent gas-lubricated Reynolds equation, and the dynamic motion equation is solved by Newmark-β method. The unbalanced responses of the rotor system supported by finite gas-lubricated journal bearings are analyzed by bifurcation diagram, orbit diagram, Poincaré map. The numerical results reveal periodic, period-4 motion of nonlinear behaviors of the system.
Microstructure Evolution of Hypereutectic Cu98Cr2 Alloys
Authors: Zhou Zhi Ming , Tang Li Wen , Huang Wei Jiu , Luo Jing , Li Xiao Ping , Zhou Tao , Liu Chun , Xia Hua
Published: May 2011

Hypereutectic Cu98Cr2 alloys were prepared by vacuum arc melting and electromagnetic levitationing method. The microstructure evolution was investigated during the solidification process. It is shown that for the arc melted hypereutectic Cu98Cr2 alloy, the general microstructures consist of primary β(Cr) grains distributes on α(Cu) matrix and (α+β) eutectics set in cellular α (Cu) phase. However, due to the different solidification rate, the primary β(Cr) phase, (α+β) eutectics and α(Cu) phase coexist for the electromagnetic levitated hypereutectic Cu98Cr2 alloy. The reason for the different microstructure and evolution for the hypereutectic Cu98Cr2 alloy is studied in this paper.
Method to Analyze Chemo-Mechanical Behavior of Shape Memory Polymer in Response to Solvent
Authors: Lu Hai Bao , Yin Jin Ying , Jia Jiu Si
Published: May 2011

Thermo-responsive shape-memory polymer (SMP) has been experimentally demonstrated that shape recovery can be induced by plasticizing solvent. Subject to being immersed into solvent, deformed SMP recover from the temporary shape to original shape, leading to shape recovery induced by the molecular interaction. The actuation of styrene-based SMP has been carried out by electrostatic dipole-dipole interaction and physical swelling effect, respectively. The model can be used to predict the effect of prestress, strain, volume change and chemical potential on SMP actuation in the solvent. Finally, it is found that the simulation agrees well with experimental results. The authors show that the chemo-mechanical instability occurs when the Hessian of the free-energy function ceases to the positive definite. Their calculations show that the shape recovery behavior of SMP is driven by the entropy change markedly, agreeing with existing experimental observations.
A Study of Automobile Four-Wheel Location Technology Based on Machine Vision
Authors: Zhou Chuan De , Lai Li
Published: May 2011

This paper researchs the space vector change and machine vision recognition based on plane target cooperation identification.Then establishes plane target imaging model, space attitude measurement algorithm and software flow, which are utilized in the measurement of automobile four-wheel location. The results indicate that this method is feasible in the automobile four-wheel location technology with the advantages of good anti-interference, fast speed, wide range and high accuracy.
Microstructure of Cu75Cr25 Alloys under Different Conditions
Authors: Zhou Zhi Ming , Huang Wei Jiu , Tang Li Wen , Li Xiao Ping , Luo Jing , Zhou Tao , Zhan Jie , Peng Cheng Yun
Published: May 2011

The microstructure of Cu75Cr25 alloys was investigated by using vacuum non-consumable arc melting, electromagnetic levitation and splat quenching. The microstructure and solidification behavior of the Cr-rich were investigated by scanning electron microscopy (SEM). The results showed that inhomogeneous Cr-rich dendrite distributes on Cu-rich matrix for arc melted alloys. The microstructure consisting of a fine dispersion of Cr-rich dendrite in a Cu-rich matrix for electromagnetic levitated alloys. However, the morphology and size of the Cr-rich phase vary greatly with the cooling rate for splat quenched alloys. The Cr-rich phase show both dendrites and spheroids, this means liquid phase separation occurred during rapid solidification.
Development of a Freeze-Drying Process for Wet Gelcast Bodies
Authors: Wu Hai Hua , Du Xuan , Tian Qi Hua
Published: May 2011

Wet gelcast body contains the same amount of water as the starting slurry, which has to be eliminated by a subsequent drying step. But in an indirect solid freeform fabrication (ISFF) process, the wet gelcast body is surrounded by an integral sacrificial mold, and drying cracks may be formed due to mold constrains. In the paper, freeze-drying was first introduced to deal with the wet gelcast body for preventing the cracking by minimizing drying shrinkage. First, the contents of non-freezing, freezing bound and free water in polyacrylamide gel (PAG) were evaluated by differential scanning calorimetry(DSC). Secondly, the prefreezing temperature and time were determined by an electrical resistance method. The change rule of the freeze-drying shrinkage with the prefreezing temperature was discovered. Finally, complex-shaped ceramic parts were fabricated to verify the feasibility and effectiveness of the freeze-drying process.
A Smoke Simulation Technique Based on Particle System
Authors: Zhan Yong Song , Liu Wen Zhao
Published: May 2011

To achieve photorealistic special effect for the industry of virtual reality, this paper proposed a real-time smoke simulation technique using particle system. Firstly, the component of particle system is discussed according to the requirement of virtual reality. Secondly, a stable scheme is employed to solve the physical equation regulating the behavior of smoke, which is modeled by the particle system. Thirdly, the object-oriented program scheme of particle system is presented in detail. Experiment results show the robustness and feasibility of the proposed technique.
Data Fusion Based Quality Monitoring and Control of Strip Thickness
Authors: Peng Kai Xiang , Zhou Dong Hua
Published: May 2011

This paper first introduces the principle of AGC and conventional AGC in Hot Strip Mill (HSM). A linearized and discretized state-space model used for rolling force and thickness control is obtained by using recursive squares method. A data fusion algorithm based on Kalman filter is presented. For hot strip systems with complex multi-variables, an asynchronous fusion estimation algorithm is built and applied to the thickness prediction of the hot strip mill and the plasticity coefficient Q of strip prediction. Finally, real-time prediction on thickness and plasticity coefficient of the coming strip is synthetically utilized in hot strip rolling thickness control system, to improve the quality of final coming strip thickness.
A Design in the Optimal Precision Forging Process about Half Axle Gears
Authors: Tong Ying
Published: May 2011

The rigid-visco-plastic finite element model for the hot forging process of half axle gear was established, and the enclosed-die forging processes with different process parameters were simulated. As for the present forming process, the main influence factors on precision forming quality were identified and analyzed. The results show that proper die structure and cavity dimensions, suitable web thickness and position can improve material filling effect, which ensures gear tooth dimensions.
Lifetime Maximization Routing Based on Genetic Algorithm for Wireless Sensor Networks
Authors: Chen You Rong , Ren Tiao Juan , Wang Zhang Quan , Ping Yi Feng
Published: May 2011

To prolong network lifetime, lifetime maximization routing based on genetic algorithm (GALMR) for wireless sensor networks is proposed. Energy consumption model and node transmission probability are used to calculate the total energy consumption of nodes in a data gathering cycle. Then, lifetime maximization routing is formulated as maximization optimization problem. The select, crosss, and mutation operations in genetic algorithm are used to find the optimal network lifetime and node transmission probability. Simulation results show that GALMR algorithm are convergence and can prolong network lifetime. Under certain conditions, GALMR outperforms PEDAP-PA, LET, Sum-w and Ratio-w algorithms.
Experimental Study of Nanoparticle as Oil Additives
Authors: Zhang Yong , Zhao Xiao Jing , He Qiang , Jun Ye , Niu Qin Po
Published: May 2011

Cu nanoparticles as N32 base oil additives were studied in the paper. The structure of Cu nanoparticlcs was characterized by Transmission Electron Microscopy (TEM) and X-ray powder diffraction spectroscope (XRD). The widely used steel-steel friction system was chosen to test the feasibility and practicality of Cu nanoparticles as bearing lubricant additives. The results show that N32 base oil with 0.5% Cu nanoparticle can improve the test sample contact fatigue life than pure N32 base oil.
Bill of Manufacturing Resource Oriented to Capacity Allocation in Steel Enterprises
Authors: Bo Hong Guang , Huang Wen Qiu , Liu Xiao Bing
Published: May 2011

Aiming at characteristics of production and requirement, analyzing multi-dimensional structure features of manufacturing resources, Bill of Manufacturing Resource for capacity allocation was presented based on mapping logic relationships. The state description matrixes of process load and capability were built upon Bill of Process as a coupling; the associated structure of capacity, process and material is expressed according to operations in each production stage. With manufacturing process information being integrated and carded, the accurate description of manufacturing resources can be obtained. Decision support data is provided for capacity allocation in steel enterprises. BOMR model is verified as feasible and effective by conducting in an actual enterprise.
Synthesis and Characterization of Nanoflakes β-Ni(OH)2 Microspheres for Supercapacitors
Authors: Yu Zhan Jun , Dai Ying , Chen Wen
Published: May 2011

Nanoflakes β-Ni(OH)2microspheres were successfully synthesized by a facile hydrothermal. The microstructures and morphology were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Electrochemical properties studies were carried out using cyclic voltammetry (CV), galvanostaitc charge/discharge and electrochemical impedance spectroscopy methods, respectively. The results exhibited that the β-Ni(OH)2single electrode had high specific capacitance in KOH electrolyte. A maximum specific capacitance of 1929 F/g could be achieved in 6 M aqueous KOH with 0 to 0.4 V potential at a charge-discharge current density of 6 mA/cm2. Therefore, the obtained nanoflakes β-Ni(OH)2microspheres can be a potential application electrode material for supercapacitors.
Research on the Forging Penetration Efficiency of 40Cr Axial Forging by the Simulation of Dynamic Recrystallization
Authors: Tong Ying
Published: May 2011

The property of Heavy axial forgings can be modified by the reasonable drawing process with the advantage of dynamic recrystallization. In view of formation, heat transfer, heating generation, dynamic recrystallization a macro-micro coupled process was modeled, and the drawing process of φ300 mm×4000 mm axial forging is simulated .It is found that when the cumulative reduction ratio reaches 9% in the second round, the dynamic recrystallization occurred in the material as it reached a critical strain condition .With the reduction ratio increases, the volume fraction of dynamic recrystallization increases. When the cumulative reduction ratio reaches 60%, about 67% of the inner region of the axial forging is modified fully. After the drawing process, the dynamic recrystallization grain size in 60% of the cross-section area is less than 100 μm , and the grains get refined.
Varying Parameters of the Object Model on Fuzzy Neural Network Controller for Activated Sludge Method of the Sewage Treatment System
Authors: Shi Zhao Hui , Wang Cheng Zhi
Published: May 2011

In this paper, we take characteristics of wastewater treatment and process technology, drawing on the effectiveness of thetraditional PID control and on the basis of its lack, with the key steps in the sewage treatment process - Aeration control of part of the process parameters, Fuzzy neural network control of dissolved oxygen concentration (DO) to achieve negative feedback control loop,design a model-based closed-loop cascade control system. Fuzzy systems, membership function, the structure of the network topology and algorithms are based on the actual issues identified in the fuzzy variables. Aiming at the four parts of the fuzzy control, adopting four fuzzy neural network based on the standard model - the input layer, Fuzzy layer,Inference layer,Clear layer are corresponding with it. Standing on two points: the dissolved oxygen concentration control and the rate of change from the error ,then design the Fuzzy neural network controller. Then the fuzzy neural network control technology could be used in wastewater treatment on the specific application of process control.
New Approach of Encrypting Embedded Data in H.264 Compressed Video
Authors: Idbeaa Tarik , Jumari Kasmiran , Abd. Samad Salina , Abdulgader Ali , Eshah Nidal
Published: May 2011

Digital video steganography has attracted a great deal of research interest in the recent few years in applications. In this paper, we propose a method to embed and encrypt messages into video sequences by using steganography technique Based on the H.264 video coding standard. The system implemented in this work provides robust H.264 video compression constant, without significantly affecting the overall bit rate and quality of the video stream. The results indicate that the algorithm can be implemented steganography fast and efficiently and effect vision and peak signal to noise ratio (PSNR) of video sequences are almost unaffected after decoding.
Analysis on Temperature Field of Work-Piece during Cross Wedge Rolling
Authors: Liu Wen Ke , Zhang Kang Sheng , Hu Zheng Huan
Published: May 2011

Based on the rigid-plastic deformation finite element method and the heat transfer theories, the forming process of cross wedge rolling was simulated with the finite element software DEFORM-3D. The temperature field of the rolled piece during the forming process was analyzed. The results show that the temperature gradient in the outer of the work-piece is sometimes very large and temperature near the contact deformation zone is the lowest while temperature near the center of the rolled-piece keeps relatively stable and even rises slightly. Research results provide a basis for further study on metal flow and accurate shaping of work-piece during cross wedge rolling.
Structural Dynamic Reliability on Supercavity Vehicle
Authors: Liu Ming , An Wei Guang
Published: May 2011

Dynamic reliability of supercavity vehicle is investigated. The vehicle is modeled as thin shells, using eight-node super-parametric shell elements. To deal with the tail of supercavity vehicle structures subjected to stationary random excitations, and the wave passage effect must be considered, an efficient method, the Pseudo Excitation Method, is suggested. The stationary random excitation is transformed into a deterministic transient excitation. The response can be obtained by Newark method, at last dynamic reliability of supercavity vehicle can be got base on the rule of first excursion failure. Examples show that this method is simple, efficient and has good precision.
Design of a Torsional Dynamic Absorber Using Magnetorheological Elastomers for Powertrain Vibration Control
Authors: Hoang Nga , Cao Di
Published: May 2011

This paper presents the design of torsional adaptive tunable vibration absorber (ATVA) using magnetorheological elastomers (MREs) for vibration reduction of powertrain systems. The MRE used for the ATVA development consists of a silicone polymer, silicone oil and magnetic particles with the weight fractions are 60%, 20%, 20%, respectively. Experimental testing is conducted to measure MRE Young’s modulus and damping ratio. With the MRE, a dynamic absorber design is proposed for powertrain vibration reduction and the parameters of magnetic circuit such as the number of turns of coils can be determined. Also, the mechanical parameters of the dynamic absorber are designed. In addition, the ATVA effectiveness is investigated through simulations, which is useful to optimize ATVA parameters to develop the ATVA.
A Novel Particle Swarm Algorithm to Optimize QoS Unicast Routing
Authors: Ye An Xin , Wu Jian Bin
Published: May 2011

Unicast routing service is becoming a important requirement of computer networks supporting multimedia applications. And unicast routing problem has been demonstrated technically as a NP-complete. This paper proposes a novel QoS-based unicast routing algorithm using the Chaotic Particle Swarm Optimization algorithm (CPSO).The algorithm enhance the global searching ability when some particles have trapped in local minimums by chaotic series .The novel algorithm makes use of the ergodicity of chaotic search to improve the capability of precise search and keep the balance between the global search and the local search. The result of QoS shows that the CPSO algorithm has the advantage over the conventional algorithms in efficiency.
The Numerical Simulation of GH4169 Alloy during Cross Wedge Rolling
Authors: Zhang Ning , Wang Bao Yu , Hu Zheng Huan
Published: May 2011

The metal microstructure of a product formed by cross wedge rolling (CWR) has much effect on the comprehensive properties of the final product. The microstructure model of GH4169 alloy was programmed into the rigid-plastic finite element software DEFORM-3D by the secondary development in this paper, so the microstructure evolution during the CWR process can be simulated. The finite element model (FEM) that coupled deformation, heat transfer and microstructure evolution was established. Based on the model, the evolution of microstructure of GH4169 alloy in the process of CWR was realized with the simulation. The strain, strain rate, temperature and the distribution of grain size of the part were obtained in the whole process of CWR. The simulation results show that the dynamic recrystallization is the main grain refinement mechanism for the CWR process and the grain refining effect of the workpiece during the CWR process is remarkably.
The Electric Retrofit Design of Forestry Tending Vehicle’s Drive System
Authors: Wei Chao , Liu Jin Hao
Published: May 2011

By comparison of the drive systems in electric vehicle and fuel vehicle, this study indicates the main differences of the structures between these two items, and explores the electric retrofit designs of forestry tending vehicles theoretically and practically, upon focusing the developing trend of cleaning environment and based on Tractor 50. On this foundation, the paper finally puts forward to suggestions on retrofit design.
Timeslot Allocation Scheme for Cognitive Satellite Networks
Authors: Wang Li Na
Published: May 2011

In this paper, we investigated timeslot allocation scheme in medium access control protocol for cognitive satellite networks. The timeslots for satellite primary users were allocated according to the reserve channel with priority fit algorithm and the timeslots for cognitive users were allocated according to the prediction algorithm. Compared to random allocation scheme, the correction ratio of timeslot allocation using the prediction algorithm was improved. The proposed timeslot allocation scheme adopted the combined backoff algorithm to avoid collisions. And then the improved throughput and the reduced delay could be obtained. Simulation results verify the effectiveness of the proposed timeslot allocation scheme.
Influence of Aggregate Volume Ratio of Mortar on the Migration of Cations Using the Accelerated Lithium Migration Technique
Authors: Wang Wei Chien , Liu Chih Chien , Lee Chau
Published: May 2011

This study utilizes mortar specimens, to design 3 different a/c ratios of 2.25, 2.75, and 3.25. The aggregate volume ratios (Vf) are 46 %, 52 %, and 57 %, respectively, while the w/c ratio is 0.5, and undergoing a 9, 12, and 15 A/m2 constant current density Accelerated Lithium Migration Technique after curing for 3 months. Results show that, on specimens applied with the same current density, the time of Li+ to pass through the specimen, and steady state flux and migration coefficient all exhibit a positive linear correlation with Vf. At the same time, the non-steady state migration coefficient for Li+ have a negative linear correlation with Vf.
Microstructural Characterization of Silicon-Alloyed Pyrolytic Carbon for Mechanical Heart Valves
Authors: Zhang Jian Hui , Sun Hai Bo , Wang Gen Ming , Guo Peng Hai
Published: May 2011

Microstructural information obtained for silicon-alloyed pyrolytic carbon coatings used for heart valves using X-ray diffraction, scanning electron microscopy and energy dispersive spectroscopy is described. The coatings consist of two phases, pyrolytic carbon and β silicon carbide, whose crystallite sizes are small. The coatings are principally composed of spherical particles that are from 300 to 1000 nm in diameter. These spherical particles, between which there are occasionally pores, are welded by laminar carbons. The silicon, content of which is moderate, disperses uniformly in the coatings.