bluuebunny/crossref_metadata_2025 huggingface dataset:
Experimental Investigation on Laser Milling of Al2O3 Ceramic
Authors: Xu Zhao Mei , Hong Zong Hai
Published: October 2013

Milling of Al2O3 ceramic is affected by various factors. Combination of laser milling parameters was optimized based on orthogonal experiment in this study. The affect degree of the parameters on the milling depth was obtained by range analysis ,based on which process parameters were optimized and laser milling experiment was taken on circular cavity using optimized parameters. The results indicated that the sequence of the factors affecting on the milling depth was laser power,scanning speed, overlap amount,defocused quantity successively. By using optimized parameters,milling depth of 0.4mm was obtained for single layer experiment,and milling result was satisfactory. The roughness was increased because the molten on the specimen surface failed to be removed,thus the pressure of the assist huff gas should be increased to improve the surface quality.
The Design of Ultrasonic Ranging Car Collision Prevention Alarm System
Authors: Qu Xiao , Zheng Wei Gang
Published: October 2013

This article in view of the situation of highway automobile rear-end collision accident frequency, designed and developed based on the ultrasonic ranging car anti collision warning system, its main purpose is to get the driver more parking time, thereby reducing the occurrence of accident. The design on the basis of the minimum safety distance model, and puts forward the system solution: by ultrasound to measure the distance of the two cars, using this system as the control core, for the analysis of all kinds of information, when driving distance less than the minimum safety distance control will alarm and stop the car.
A Differentiated Registration Method for Complex Surfaces
Authors: Tan Gao Shan , Zhang Li Yan , Liu Sheng Lan , Shi Qing Lan
Published: October 2013

Different error requirements on different surfaces are necessary in many situations. If the registration between the measured dataset and the nominal surface is performed ignoring these differences, an inaccurate result could occur due to the surfaces which have low precision. An improper registration even results in false verdict. So the differentiated registration is of significance in precision engineering. In this paper, a new registration method taking into consideration of the different error requirements is proposed. Firstly surfaces are classified based on different error requirement. Then, appropriate weight factors are iteratively given to these surfaces. Based on the change relationship of error and weight factors, the algorithm controls the error distribution by optimizing the weighted least squares. Our method has the great flexibility in distributing the error, which is suitable for engineering applications. The experiment demonstrates the validity.
Application of Operations Research in Management
Authors: Zhou Yong , Qi Jing
Published: October 2013

Operations research as a branch of comprehensive and multidisciplinary cross science, there are two types of decision problems. The first one is how to make use of resource to fulfill the tasks as much as possible. The other one is how to Using the least amount of resources to complete a certain task. The planning model about resource utilization in the factory is built through the investigation and analysis. It uses limited resources to complete the production task at most. In the actual problems of the university financial management and daily life, multi-target optimization is necessary. Analytic hierarchy process is used to built Hierarchical evaluation model and make decision of how to select school for graduate education.
A Windchill-Based PDM Application to Enhance Agricultural Machinery Chassis Design
Authors: Jin Xiao Ping , Zhang Tong , Song Zheng He
Published: October 2013

Considering the actual requirements of data and process management in agricultural machinery product design, a Windchill-based PDM system is proposed for agricultural chassis products design regarding its system architecture, data models and functional modules. Specific workflow models and data models are built to provide a collaborative platform for the product data management. It consists of seven major functional modules such as data management, data search, management of team, version and permission and system integration, etc. Its implementation methods will provide a useful guide and application for the agricultural machinery manufacturing enterprises to achieve rapid design of their products.
The DFT Studies on a Novel Hydrogen Storage Material Mg12Ni6-xCrx(x=0,1)
Authors: Liu Ying , Meng Ling Peng , Zheng Shi Jun , Zhang Shao Wen
Published: October 2013

The structural, electronic and thermodynamics stability properties of the new hydrogen storage materials Mg12Ni6-xCrx(x=0, 1) are analyzed based on the density functional theory (DFT). The enthalpy of hydride formation of Mg-Ni alloys is-65.07kJ/mol (H2). For a small range of Cr doping, the enthalpy of hydride formation of the Mg-Ni-Cr system is-54.99 kJ/mol (H2), widely accepted as considerable value for applications. The thermodynamics properties of Mg12Ni6-xCrxH2(x=0, 1) are expected to be improved by addition of Cr elements. The results will play an important role in practical research field.
Novel Anticaking Materials of Bentonite, Biological Carbon and Abandoned Animal/Plant Oil in Compound Fertilizer
Authors: Hu Pan , Zhang Yi He , Wang Yue , Fu Meng , Zhou Feng Shan
Published: October 2013

A novel anticaking material was prepared from from Bentonite, Biological Carbon and abandoned animal/plant oil in this study. In order to determine the optimal dosage of bentonite, biological carbon and abandoned animal/plant oil, the experiments has been performed systematically. The effect of anticaking materials was described by caking ratio. BAC was prepared by 30g of bentonite, 5g of abandoned animal/plant oil, 2.0g of biological carbon. With dosage of BAC is 10g / 200g (compound fertilizer), In the 30 days storage period, preparation of BAC can achieve the requirement of the anti-caking. However, the anti-caking effect is weaker as the longer storage time and Anti-caking cycle of BAC is shorter.
Preparation and Properties of Cf-Ti3SiC2-Cu-Graphite Composites
Authors: Xu Shao Fan , Xu Shao Ping , Zhu Cheng Nan , Zhao Qing Bi
Published: October 2013

Copper-plated short carbon fiber/copper-plated Ti3SiC2-Cu-graphite composite, copper-plated short carbon fiber/Ti3SiC2-Cu-graphite composite with the same carbon fiber content and copper-plated Ti3SiC2-Cu-graphite composite were prepared by the powder metallurgy method. Physical and mechanical properties of these composites were tested. The dry friction tests of the composites under sliding velocity of 10m/s and load of 4.9N were conducted for 36 hours. The results show that the properties of the Cf-copper-plated Ti3SiC2-Cu-graphite composite such as electric conductivity, bending strength and wear resistance are remarkably increased than those of either Cf-Ti3SiC2-Cu-graphite or copper-plated Ti3SiC2-Cu-graphite composites.
Anti-Wear Performance of Novel Tri(hydroxymethyl) Propane Esters as Additives in Rapeseed Oil
Authors: Ji Xian Bing , Chen Yin Xia
Published: October 2013

Three novel B, N, S-containing tri (hydroxymethyl) propane (TMP) esters were synthesized. The anti-wear performance of the synthesized compounds as additives in rapeseed oil (RO) was evaluated with a four-ball tester. The results show that the novel TMP esters have good antiwear performance when they are used as additives in rapeseed oil under all test loads. The action mechanism was investigated through analysis of the X-ray photoelectron energy spectrometer. The results indicate that the additives in RO adsorb and react with metal surface to form a protective film composed of organic compounds, B2O3 and iron oxide.
Study on Grinding Kinetics of a Unique Double-Sphere Grinding Media for Cassiterite-Polymetallic Sulphide Ores
Authors: Feng Jin Peng , Feng Xia , Ma Shao Jian , Liu Jie , Mo Wei , Yang Jin Lin , Su Xiu Juan
Published: October 2013

The grinding kinetics are strongly affected by the grinding media size and style, in order to improve the grinding efficiency and solve the over-grinding problem of cassiterite in the process of grinding in cassiterite-polymetallic sulfide ores plant. A unique double-sphere grinding media has been designed and the grinding kinetics of this media with different diameters for grinding products of different size fractions have been investigated in this paper.
Effect of Ce Co-Deposition on Phase Structure and Thermal Stability of Ni-Cu-P Alloy
Authors: Sun Hua , Ma Hong Fang , Feng Li Ming , Guo Xiao Fei
Published: October 2013

Two nickel base multicomponent Ni-Cu-P, Ni-Cu-P-Ce alloy coatings were prepared using electroless plating method in low acidity condition, and examined by scanning electronic microscope, x-ray diffractometer and x-ray flourometer respectively on its morphology, component and structure characteristic. Thermodynamic stability of the two samples were also examined by thermal analysis method. Research revealed a microcrystalline characteristic with compact and tight surficial cellular structure of Ni-Cu-P-Ce coating. And addition of Cu and Ce into Ni-P alloy could enhance thermodynamic stability of the coating, and let coatings transformation temperature from amorphous state to crystalline state increase approximately to 480°C Celsius. X-ray diffraction analysis indicated the reaction products to be crystal grains of nickel atoms and intermetallic compound of Ni3P.
Phase Structure and Thermodynamic Stability of Various Nickel-Base Multicomponent Alloy Coating
Authors: Sun Hua , Ma Hong Fang , Feng Li Ming , Guo Xiao Fei
Published: October 2013

Nickel base multi-component alloy Ni-PNi-Cu-PNi-W-P and Ni-Co-P were prepared using electroless plating methodand examined by scanning electronic microscope, x-ray diffractometer and x-ray flourometer respectively on its morphology, component and structure characteristic. Thermodynamic stability of the three samples were also examined by thermal analysis method. Research revealed all three coatings possessed compact and tight surface structure with excellent thermodynamic stability. Also, it was more efficient to enhance the thermodynamic stability of the Ni-P alloy coating by adding atom Cu rather than atom Co or atom W. While Ni-W-P coating demonstrated a microcrystalline structure, both Ni-Co-P and Ni-Cu-P were amorphously structured. After thermal treatment three alloy coatings all experienced transformation from non-crystalline or microcrystalline state to a more stable crystalline state, XDR analysis indicated the reaction products were unit cells and inter metallic compounds of Ni3P.
Microwave-Assisted Precipitation Synthesis and Photoluminescence Properties of SrWO4 Mesocrystals with Different Shapes
Authors: Xing Guang Jian , Wang Yi , Yu Chun Na , Zhao Chang , Wu Guang Ming
Published: October 2013

Well-crystallized SrWO4 mesocrystals with different shapes including flower-like sphere, bundle, peanut, dumbbell, and notched sphere were controllably synthesized via a simple microwave-assisted precipitation method. X-ray powder diffraction (XRD), field-emission scanning electron microscopy (FESEM), high-resolution transmission electron microscopy (HRTEM), and photoluminescence (PL) measurements were used to characterize these mesocrystals. XRD patterns indicate that the SrWO4 mesocrystals present a scheelite-type tetragonal structure. FESEM and HRTEM micrographs showed different shapes for the SrWO4 mesocrystals. The molar ratio of [WO42-] to [Sr2+] was found to play an important role in the morphological controlling of the resulting SrWO4 mesocrystals. With the increase of the molar ratio, the shape of the SrWO4 mesocrystals changed from flower-like sphere assembled with nanorods to notched sphere with intermediate peanut and dumbbell shapes. PL spectra measurements showed that the luminescence properties of the SrWO4 mesocrystals strongly relied on its shapes.
Biomimetic Fabrication and Infrared Properties of Hierarchically Structured ZnO Derived from Cotton Fibers
Authors: Zhang Tao , Zhou Yu Ming , Wang Yong Juan , Bu Xiao Hai , Xue Jin Juan , Chen Zhen Jie
Published: October 2013

Materials with infrared low emissivity have attracted great attention due to their increasingly important application in both military stealthy and thermal control. Hence, this work describes a facile, green method based on cotton fibers to fabricate hierarchically structured ZnO fibers and nanorod by simply immersion and calcination process. And infrared emissivity value of samples was also investigated. The cotton fiber adsorbed Zn2+ could be converted into ZnO nanorod by controlling reaction temperature and solution pH. The XRD pattern revealed the highly crystalline nature of the samples. In order to enhance the surface optical properties, the surfaces of biomorphic ZnO were modified by bovine serum albumin (BSA). The low infrared emissivity values were obtained in BSA modified samples, indicating that the surface properties of materials may play an important role in infrared emissivity control.
Dynamic Mechanical Properties and Phase Structure of Polyethylene/Montmorillonite Nanocomposites Prepared by In Situ Polymerization
Authors: Li Min , Xiao Li Guang , Zhao Hong Kai
Published: October 2013

Polyethylene/montmorillonite (PE/MMT) nanocomposites were prepared by in situ polymerization. The dynamic mechanical properties and phase structure of PE/MMT nanocomposites at different MMT concentrations (from 0.1 to 1.2 wt %) were studied. The storage modulus of PE/MMT nanocomposites is higher than that of the polymer matrix. And the motions of molecular relaxations and conformational transitions both in non-crystalline and crystalline phases are confined by the strong interactions between polymer and MMT. Otherwise, the spherulite size gradually decreases with the increasing content of MMT.
Preparation and Performance of Polysulfone Hollow Fiber Ultrafiltration Membranes
Authors: Bai Yang , Liu Zhen , Sun Dao Bao
Published: October 2013

Polysulfone (PSF) hollow fiber ultrafiltration membranes were successfully prepared by dry-wet spinning technology. Dimethylacetamide (DMAC) was used as a solvent, water was used as bore liquid and coagulation bath, polyvinylpyrrolidone (PVP) was used as polymeric additive. The effects of spinning conditions on membrane structures and properties were investigated in present study. The results indicated that with the increase of PVP concentration, pure water flux increased and developed finger-like pores were formed. High coagulation bath temperature restricted pure water flux, 30°C was the best for the preparation of high-performance ultrafiltration membranes. When the air length was 11cm, the membrane comprehensive performance was the best.
Deformation Analysis for Hydrostatic Rotary Table of Heavy Duty CNC Machine Tool
Authors: Dong Xiang Min , Cai Li Gang , Zhao Yong Sheng , Shi Xiao
Published: October 2013

The deformation of constant flow and closed type hydrostatic rotary table of heavy duty CNC machine tool has a great influence on the film thickness because of its large diameter, high load-bearing. According to the circular plate deformation theory of elasticity, differential equations of worktable deformation are derived in the simply supported conditions when bearing uniform force of different locations. Displacement curves of worktable are obtained. Force and deformation weaknesses of hydrostatic rotary table are found, which can provide theory basis for supporting location of heavy workpiece machining and whether oil film is failure or not.
Eddy Current Detection for Weld Defect and Automatic Separating System for Defective HFW Pipe
Authors: Shen Xiao Qin , Yu Fu Sheng , Bao Ying
Published: October 2013

An eddy current detection and automatic separating system is developed to defect the weld defects in HFW pipe and separate the defective pipe. Application of phase sensitive detector, the pure signal of the weld defect is obtained through a low-pass filter. The information of the weld defect signal, the displacement of flying saw and the welding speed of welded pipe are fused together. The mathematical model is established for unfixed length truncation of the defective welded pipe. An automatic separating system is designed to cut and separate the defective welded pipes in the production line. The practice shows that this system can accurately detect the weld defect, cut the welded pipe in the perfect position and maximumly reserve the welded pipe without defect. This detection and separating system can improve the quality of the welded pipes and avoid the waste.
The Mechanical Design and Simulation of Marine In-Pipe Robot Based on Metamorphic Mechanism
Authors: Fei Lan Bing , Wei Yu Ping , Cui Fang
Published: October 2013

According to the characteristics of the marine pipelines, we present a kind of ships in-pipe reconnaissance robot for different types of pipes. Finish an optimized design for the adjusting mechanism by mechanics analysis of the metamorphic mechanism, and by the analysis of overcoming obstacles performance, the robot can not only adapt to different types of pipes, but also has good obstacle surmounting abilities. No doubt it improves the stability and reliability of the robot. The force and movement trajectory of the robot is obtained by using ADAMS, which carries on the kinematics analysis. Simulation results show that the robot can pass through 330 ~ 486 mm (diameter) pipes smoothly and can pass 5 mm circular obstacle by spring within the scope of the traction.
Influence of Cutting Parameters on Vibration Acceleration in Micro-End-Milling
Authors: Ma Li Jie , Wang Xi Bin , Li Yong Feng
Published: October 2013

In order to reveal the change rule of vibration acceleration during micro-end-milling straight groove, the single-factor and orthogonal experiments are employed to confirm the influence of milling parameters on vibration acceleration. On this basis, the relation equation between milling parameters and vibration accelerations is built. The result show that, the vibration acceleration along the width of groove is bigger than that of feed direction and it will increase rapidly with the improve of cutting speed; the predicted result of vibration acceleration is in good accordance with test result, therefore the relation equation can be used to predict vibration acceleration.
Parameters Optimization of Multistage Pump-Off Propped Fracturing in Thick Formation
Authors: Jia Suo Gang , Zhang Yu , Wan You Yu , Teng De Lin , Jia Yuan Zhao , Sun Peng
Published: October 2013

Based on the proppant index, a production forecast method for thick oil-bearing formation fracturing was deduced. And combined with NPV methodology, treatment scale of multistage pump-off propped fracturing can be optimized. The effects of treatment parameters, such as injection stages, pumping interval, pumping rate, the ratio of pre and post stage pumping rate, on the fracture geometry, conductivity and production were simulated and analyzed. It reveals that two injection stages, 5 minutes of pumping interval and consistent pumping rate contribute to the highest annual cumulative production. Moreover, the injection stages make the most significant influence on production. Optimization results, applied to Kunbei Oilfield, achieved satisfactory application effects. The single well average production was enhanced by7.92 t/d, the stimulation ratio was 13.56, and the stimulation validity was about 270 days.
Analysis on Mechanical Parameters at SCC Tip in Fusion Boundary Region of Dissimilar Weld Joint
Authors: Zhao Ling Yan , Xue He , Yang Fu Qiang , Gui Yuan Kui
Published: October 2013

Microstructure and material mechanical property in the fusion boundary (FB) region of dissimilar weld joints in light water reactors are quite complicated and different from the bulk material, which make it more susceptible to stress corrosion cracking (SCC) and produce high weld residual stress. To investigate SCC behavior in the FB region of an Alloy 182-A533B dissimilar weld joint, considering the mechanical heterogeneity, mechanical parameters ahead of crack tip with different sampling location are analyzed. It suggests that the stress near crack tip would be significantly higher in a high yield stress material while the strain would be much smaller, and the effect of the material properties around FB region on strain is smaller than that on stress. The result of J-integral indicates FB region would be a barrier when crack in Alloy 182 weld propagates towards LAS.
Tubing Cleaning Nozzle Assembly Structure Improvement and Numerical Simulation
Authors: Zhang Yong , Ai Zhi Jiu , Wu Yan , Jian Qing Ping , Yang Yun Da , Wang Shuang , Chen Peng , Liu Xu
Published: October 2013

The installation position of nozzle directly affect the efficiency of high pressure water jet cleaning. In order to improve the cleaning efficiency, the paper establish the three-dimensional structure and numerical model of the original nozzle assembly and the spiral nozzle assembly. The numerical simulation results show that, on the same boundary conditions, the effective hit range of the spiral nozzle assembly is greater and more uniform than that of the original nozzle assembly.The effective surge pressure of the spiral nozzle assembly is larger than that of the original nozzle assembly, spiral nozzle assembly can can reduce the blind cleaning area and improve the cleaning efficiency.
Recycled Polypropylene/SEBS Polyblends: Manufacture and Mechanical Property Evaluation
Authors: Lin Jia Horng , Lin Zheng Yan , Chen Jin Mao , Lou Ching Wen
Published: October 2013

This study polystyrene-b-poly (ethylene-r-butylene)-b-polystyrene (SEBS) elastomer to modify recycled polypropylene (RPP). Tensile strength test, impact strength test, and a polarized light microscope are used to evaluate the mechanical properties and spherulite morphology of the resulting RPP/SEBS polyblends. The experiment results show that with an increase in SEBS, tensile strength of the polyblends decreases from 29 MPa to 13 MPa. With the distribution of SEBS in RPP, the spherulite size of RPP decreases, but the impact strength significantly increases.
Study on Fatigue of Hinge Sleeve of Cubic Press based on ANSYS
Authors: Sun Xuan , Qi Wen Zheng , Zhao Hong , Li Hai Xia
Published: October 2013

Hinge sleeve of cubic press is the most important equipment which is used in the field of processing and production of super-hard materials, and is always under super high pressure, so the problem of fatigue must be concerned. In this paper, Actual model of hinge sleeve of cubic press was established in ANSYS. Strength of hinge sleeve of cubic press was calculated under super high pressure load in realistic condition, which the equivalent stress contours were obtained, and the danger point was found out. Then the fatigue analysis was carried out to this danger point by applying ANSYS/Fatigue module. Consequently the fatigue usage coefficients were obtained.
Mechanics Simulation of Lathe Tool Fixture and Tool Carrier in CNC Machine Tool for Guide Disc
Authors: Yang Ke , Guan Shang Jun , Li Chang Hua
Published: October 2013

3-D model of the lathe tool fixture and tool carrier in\ CNC Machine Tool for guide disc is established through Solidworks. Then, the 3-D model is input into ANSYS, simulating the stress map and the nephogram of displacement deformation of the lathe tool fixture and tool carrier, which plays a important role in designing the lathe tool fixture and tool carrier.
Workspace and Control System Study for Arc Welding Robot
Authors: Zhang Dong , Lun Zeng Min , Lv Cehng Yuan , Zhao Shu Xia , Pan Wei Yi , Wang Rui , Wang Hai Tao , Gao Hong Bo
Published: October 2013

Focusing on welding problems such as poor working environment, high pressure, appalling conditions in oil and gas pipelines, pressure vessels and other large welding, a 6R welding robot was proposed. Based on D-H notation, space kinematics model of robot was founded and the kinematical equations of the grinding robot wad derived. According to the kinematics model, The robot work space was obtained by Monte Carlo methods. Furthermore, control and software system was introduced for the arc welding robotic system.
The Simulation Study of Shunt Active Power Filter in the Power System Harmonics Restraint
Authors: Rao Bin , Zou Qing Yuan , Zhong Ting Jian , Liu Qing Ping
Published: October 2013

because of the existence of non-linear loads,they will be inpouring a lot of harmonic current to the power system,in order to restrain harmonic,we have to take relevant measures to restrain. This paper introduces three measures of harmonic restraint firstly, expounds the active power filter, and then it analyses the work principle and mathematical model of shunt active power filter , building three-phase shunt active power filter simulation model,; At last, using MATLAB simulation experiment ,the result shows that the shunt active power filter of harmonic detection algorithm and the control strategy are correct and effective , and also it has the important significance to the power system harmonic restraint.
The Stability of Weft Insertion of CRT – 83 Carpet Rapier Loom
Authors: Cai Yong Dong , Ma Shun Bin
Published: October 2013

CRT- 83 carpet rapier loom is a kind of high-grade rigid rapier loom，the weft yarn will give looms to demand higher stability of the weft insertion. Theoretical analysis based on the theory research of the stability of clamping weft and weft handover shows that the rapier deformation，slipping force and the depth of clamping are main factors influencing the stability of weft insertion.In order to obtain reasonable process of weft insertion，concerned with the following factors：the grip length and outrigger length of rapier，release times of clip yarn device，initial deformation angle of spring piece.
Fracture Parameters Optimization of BZ Oilfield Horizontal Well Integral Fracturing
Authors: Xu Wen Jiang , Hu Yong Quan , Zhao Jin Zhou , Li Zhi Qiang
Published: October 2013

Horizontal well technology has become an important technological means for offshore oilfield exploitation, but at present, most of the fracture parameters optimization of horizontal well fracturing are based on the single wells productivity after fracturing and pay less attention to consider the impact of injection wells.Therefore, aiming at injection and production development mode of BZ oilfield horizontal wells after fracturing, Integral fracturing physical model and productivity forecast mathematical model of horizontal well for the purpose of improving integrated exploitation benefit of the block is established respectively.Combining with reservoir parameters of BZ oilfield, a corresponding numerical simulator is developed by means of solving mathematical model to forecast production performance of oil well with different fracture number, fracture length, fracture conductivity. The best fracture parameters are obtained through analyzing the effect of fracture parameters on accumulative oil production, which provides theoretical foundation for integral fracturing optimization design of horizontal well of BZ oilfields, and has vital site guiding significance.
Simulation of Wind Characteristics Surrounding a Container Terminal
Authors: Qin Xian Rong , Liao Xin , Liu Yuan Yuan , Zhang Qing , Sun Yuan Tao
Published: October 2013

Metal structures of present port machineries are much more flexible than those decades ago, and are therefore very vulnerable to various wind-induced vibrations, among which the frequently happened random buffeting of structures attracts some special attentions since it contributes pretty much to the early structural fatigue. The intensity of buffeting is closely related to the local surrounding wind field. In this paper, the local wind field of a container port in Shanghai of China was simulated by CFD technique, and the corresponding spatial distribution of wind velocity, turbulence intensity, and wind profile were investigated in detail.
A New Method of Design of Epicyclic Gear Trains
Authors: An Pei Wen , Lv Zhong Liang
Published: October 2013

Epicyclic gear trains have been broadly applied in engineering practice. In this paper, kinematic chains (K.C.) with single-joint (S.J.) were applied to innovative synthesis of the epicyclic gear trains. The method of the innovative synthesis of the epicyclic gear trains was presented. Not only the epicyclic gear trains in common uses were obtained, but some new types of epicyclic gear trains that are got difficultly by means of conventional combination method were gained. Thereby, a new way has been offered for the innovative synthesis of the epicyclic gear trains, at the same time, a way has also been offered for practical application of some multi-link kinematic chains gained by using the theory of type-number synthesis of the K.C. with S.J.. Examples show that the method presented in this paper is right and feasible, and the method is efficient and practical for the innovative synthesis of the epicyclic gear trains.
Development and Research of Foundation Pit Fluid-Solid Coupling Finite Element Analysis Software Based on Automatic Parametric Modeling
Authors: Pan Xiao Hua , Li Guo Liang , Yu Qian
Published: October 2013

In order to automatic parametric establish foundation pit finite element model more simple, more convenient, more efficient, a foundation pit fluid-solid coupling finite element analysis software based on automatic parametric modeling has been developed, which fluid-solid coupling and time-effect coupling are considered. The architecture, characteristics, functions and key technology of this software are introduced. Meanwhile, application of the software to CCTV foundation pit verifies the convenient and reliability. The results show that this study has important theoretical significance and application value.
The Characters of Dual Harmonic Frames of Subspaces and Applications in Signal Processing Theory
Authors: Huang Yong Yi , Zhou Jian Feng
Published: October 2013

Digital signal processing is the processing of digitized discrete-time samp-led signals. Processing is done by general-purpose computers or by digital circuits such as ASICs, field-programmable gate arrays or specialized digital signal processors. Information science focuses on understanding problems from the perspective of the stakeholders involved and then applying information and other technologies as needed. The definition of multiple pseudofames for subspaces with integer translation is proposed. The notion of a generalized multiresolution structure (GMS) of is also introduced. The construction of a generalized multiresolution structure of Paley-Wiener subspaces of is investigated. The pyramid decomposition scheme is derived based on a generalized multiresolution structure.
Multisource Image Fusion Based on DWT and Simplified Pulse Coupled Neural Network
Authors: Wang Nian Yi , Wang Wei Lan , Guo Xiao Ran
Published: October 2013

In this paper, a new image fusion algorithm based on discrete wavelet transform (DWT) and spiking cortical model (SCM) is proposed. The multiscale decomposition and multi-resolution representation characteristics of DWT are associated with global coupling and pulse synchronization features of SCM. Two different fusion rules are used to fuse the low and high frequency sub-bands respectively. Maximum selection rule (MSR) is used to fuse low frequency coefficients. As to high frequency subband coefficients, spatial frequency (SF) is calculated and then imputed into SCM to motivate neural network. Experimental results demonstrate the effectiveness of the proposed fusion method.
The Implementation Based on the Improved IEEE802.15.4e Network of the Elder Monitoring System
Authors: Wang Ping , Zhang Yang Yang , Hong Yang , Dong Lei
Published: October 2013

In the elder Monitoring System, the improved IEEE802.15.4e network is in use. In order to deduce the energy consumption, modifition is introduced to the CSL mechanism of the protocol of IEEE802.15.4e. In the CSL mechanism, short interval, which is less than the channel sampling, is applied among the arouse frame sequence to wait for the acknowledged frame. Besides, a immediate response to turn on the receiver to wait for the data frame and quick switch back to the state of the next cyclical dormancy. In this way, the energy consumption problem is better solved, which greatly expand the life of the tumble detected terminal, compared with the same device worked by means of the other wireless network. Key words: IEEE802.15.4e; CSL mechanism; low consumption
Remote Supervisory System of Classroom Lighting Based on LonWorks Fieldbus
Authors: Yin Li Jie , Zhen Ya , Fan Qi Li
Published: October 2013

A remote supervisory system of classroom lighting based on LonWorks fieldbus is presented, which controls the switch state of lights and the number of lights to turn on, achieving the purpose of energy saving. The administrator can remotely know the situation of each classroom, and be able to perform manually control. The experiment results show that the proposed supervisory system has the qualities of easy to implement, high reliability, and easy to expand.
Design of High Speed Data Acquisition System Based on FPGA
Authors: Yu Yan Xin , Chen Yu
Published: October 2013

with the rapid development of information technology, a variety of data acquisition and processing in the modern industrial control and scientific research have become an indispensable part. The data acquisition system is a bridge between the smart instruments and the outside physical world, and it is also an important way to get information. The implementation of high-speed data acquisition and real-time transmission has always been an important research direction in data acquisition system. The development of FPGA technology has provided new solution. In this paper, the typical architecture of data acquisition system was given. The hardware part mainly consists of front high-speed A/D converter module, master controller of FPGA, and USB interface circuit has been realized. According to the idea of design and the procedure of program, software part has been completed. The results show that the system has the characteristics of fast acquisition speed, high storage capacity, small transmission delay, high stability and so on.
Design of Audio Spectrum Display Based on ARM
Authors: Duan Li Na , Zhao Jin
Published: October 2013

How to realize the audio spectrum displayer system based upon ARM is introduced in detail. The system includes functions as collecting, processing, displaying after transforming of audio signals. With sound collecting, ARM technology and FFT algorithm, the design builds a real-time collecting spectrum display system, which can be put into various applications in which sounds need collecting and analyzing. The design consists of hardware system and software system. The former mainly includes the collecting and processing of sounds, the minimum system, electronic power and displayer module, while the later is to display the data transformed by ADC with FFT on the displayer. The design has been proved real-time and accurate after test.
Decoupling Control of the Gas Collectors' Pressure System Based on Neural Network Inverse System
Authors: Tian Qing , Sun Jie
Published: October 2013

For collectors pressure system strong interference, coupled, nonlinear, multi-parameter and other characteristics, based on the inverse system decoupling principle, the reversibility of the mathematical model of the gas collectors pressure system is analyzed. BP neural network which has strong nonlinear approximation ability is applied, to approximate inverse system of gas collectors pressure system. Neural network inverse system with the original system composes of the pseudo linear decoupling composite system. The neural network inverse decoupling control of gas collectors pressure system is implemented. The simulation results show that this method realizes decoupling, has a certain application.
An Improved Clustering Method Based on Data Field
Authors: Liu Yu Hua , Xu Cui , Xu Ke , Jin Jian Zhi
Published: October 2013

By analyzing the problem of k-means, we find the traditional k-means algorithm suffers from some shortcomings, such as requiring the user to give out the number of clusters k in advance, being sensitive to the initial cluster centers, being sensitive to the noise and isolated data, only being applied to the type found in globular clusters, and being easily trapped into a local solution et cetera. This improved algorithm uses the potential of data to find the center data and eliminate the noise data. It decomposes big or extended cluster into several small clusters, then merges adjacent small clusters into a big cluster using the information provided by the Safety Area. Experimental results demonstrate that the improved k-means algorithm can determine the number of clusters, distinguish irregular cluster to a certain extent, decrease the dependence on the initial cluster centers, eliminate the effects of the noise data and get a better clustering accuracy.
Effect of the Doping Ni and Overdosing Lithium for Synthesis LiMn2O4 Cathode Material by the Solid State Reaction Method
Authors: Liu Yen Chun , Liu Ming Cheng , Liu Robert Lian Huey , Chi Mao Chieh
Published: October 2013

The study with Li2CO3 and Mn3O4 through the solid state reaction makes cathode material for lithium battery spinel - LiMn2O4. According to past literature, under the solid-state reaction. The experiment carries out sintering at temperature of 850°C.. Cathode materials under these sintering temperatures are made to fabricate battery. For Ni doped LiMn2O4, the capacitance decreasing speed is slow and stable; after 15 times charging-discharging cycles, the attrition rates were 3.05 % or less. The result of experiment demonstrates that the best sintering temperature is at 850°C. Under the condition of 850°C, various contents for extra amount of lithium (1.02 mole-1.1 mole) are fabricated and range of working voltage is released. It is found a further increase of initial capacity to 140.51 mAh/g. LiMn2O4 further extends circulation and usage.
Design of Slope Deformation Monitoring System Based on WSN
Authors: Zhang Lie Ping , Wang Ping
Published: October 2013

In view of the present high hardware and communications problems of slope deformation monitoring, design a set based on wireless sensor network (WSN) of the slope deformation monitoring system.The system sets up a platform for wireless sensor network through the TI chip CC2530 and free ZigBee protocol,including the sensor node,the router nodes,the coordinator node,and the use of Kingview realizes the monitoring configuration data of slope deep displacement and ground water.By testing,the system can effectively realize the monitoring of the slope data,reduces the cost of the slope deformation monitoring.
Application of Local Wave Method in the Structural Health Monitoring Signal Decomposition
Authors: Yang Lin
Published: October 2013

Health monitoring of the bridge structure has gradually become one of the hot topics. The signal decomposition technology is the key technique of the bridge structural health monitoring. The traditional data analysis and processing methods, which can only be applied to stationary or linear signal processing, have significant limitations. However, the structural response signals tested are mostly non-stationary and nonlinear. So methods that can effectively analyze non-stationary and nonlinear signal are urgently needed. Based on the summarization and analysis of the shortage of wavelet analysis method, the application of local wave method for data processing and analysis in structural health monitoring is put forward. The feasibility and superiority of local wave method is discussed. Experimental simulation results show that the application of local wave method in bridge health monitoring signal decomposition is feasible.
Comparison of Sewage Treatment Mixer in Three Pool Face Boundary Conditions
Authors: Tian Fei , Shi Wei Dong , Jiang Hua
Published: October 2013

The method for setting the boundary condition of the pool surface was studied. Using the FLUENT 6.3 CFD software,the RNG k-ε turbulence model and SI MPLE algorithm,the sewage treatment pool where a submersible mixer with two leaves was numerically simulated by describing the surface as wall,VOF model and rigid-lid assumption respectively. Meanwhile, the velocity distribution in the pool was analyzed. The results showed that: the contribution of the three different treatments to the flow in the pool are small except the area near the pool surface. In the first case ( describe the surface as wall), pool surface fluid velocity is zero, which is inconsistent with the actual situation obviously. In the other two cases (describe the surface as VOF model and rigid-lid assumption), the pool surface fluid velocity has the same velocity and is not zero,which is consistent with the actual situation. In the case of rigid-lid assumption,convergence was reached easily,and it is undemanding for the computer configuration,so it ( rigid-lid assumption) is the best boundary conditions setting method for the surface and provides guidance for the mixer numerical simulation.
Nanocrystalline TiO2 Composte Films for Enhanced Photocatalytic Activity
Authors: Dai Mei Li , Feng Ji Jun , Li Fang , Yao Ming Ming
Published: October 2013

In order to extend light response of TiO2 into the visible region and enhance its photocatalytic activity, V and W surface codoped nanocrytalline TiO2 film was synthesized by the sol-gel method. Tetrabutyl titanate (Ti (OC4H9)4) was chosen as the precursor, and ammonium metavanadate or ammonium tungstate was chosen as vanadium or tungsten source. The high-resolution field emission scanning electron microscopy (FE-SEM) results revealed that the film was composed of uniform round-like nanoparticles with size smaller than 6 nm. The photocatalytic activities of TiO2 films were investigated by degradation of organic dyes in aqueous solutions. V and W codoped TiO2 film exhibited excellent photocatalytic activity compared to undoped TiO2 film or single doped TiO2 film. The improvement mechanism by V and W codoping was also discussed. Keywords: Nanocrystalline TiO2; Composte films; Photocatalytic activity
The New Fast Algorithm Based on Transposed Matrix for Frequent Sets Mining of Association Rule
Authors: Song Shao Yun , Zhang Bao Hua
Published: October 2013

Apriori and its improved algorithms can be generally classified into two kinds: SQL-based and on memory-based. In order to improve association rule mining efficiency, after analyzing the efficiency bottlenecks in some algorithms of the second class, an improved efficient algorithm is proposed. Two matrixes are introduced into the algorithm: one is used to map database and the other to store frequent 2-itemsets related information. Through the operation of two matrixes, its time complexity and space complexity decrease significantly. The experiment indicates that the method has better performance.
Fabrication and Microstructural Analysis of CNTs Reinforced Copper Matrix Nanocomposites via MIM Technique
Authors: Muhsan Ali Samer , Ahmad Faiz , Mohamed Norani M. , Raza Malik Muhammad Rafi
Published: October 2013

Carbon nanotubes (CNTs) reinforced copper (Cu) matrix nanocomposites prepared via advanced fabrication method is presented. Functionalization and ultrasonication processes have been applied to enhance the dispersion of purified CNTs and creates sidewalls groups that have the potential to bond CNTs to the metal matrix. The main part of this approach was metal injection molding (MIM) technique, which is a combination of powder metallurgy and plastic injection molding technique. Preparation of MIM feedstock required a melting and mixing process of binder system (polymers) with the solid loading, which has been carried out using a twin screw rotor machine. This machine provides a viscous media of the molten binder with high shear forces that allow the additives (carbon nanotubes/copper powder) to be mixed properly and exfoliate the CNTs clusters with uniformdispersion inside the Cu matrix. Subsequently, to prove our expected results, observation tests of TEM, SEM, FESEM and CNTS were employed and discussed literally.
Study on the Methods of Predicting the Fouling Characteristics of Plate Heat Exchanger Based on Water Quality Parameters
Authors: Wen Xiao Qiang
Published: October 2013

Fouling characteristic of plate heat exchanger was studied through the experimental system, with the Songhua River water as working fluid. Several water quality parameters: pH value, conductivity, dissolved oxygen, turbidity, hardness, alkalinity, chloride ion, iron ion, chemical oxygen demand, total bacterial count, which had great influence on the formation of fouling, as well as running condition, fouling resistance and other parameters were measured through the experimental system built. A group of fouling data of the typical water quality was obtained. Two prediction models of fouling characteristics of the plate heat exchanger were built based on partial least squares algorithm (PLS) and support vector regression machine (SVR) with water quality parameters as independent variables and fouling resistance as dependent variable, and the impact of water quality parameter on predicting accuracy was analyzed. Research results showed that: the prediction accuracy of two methods could be controlled within 12.5% and meet the requirements of the project. Through the comparison of the prediction results, it was proved that the SVR method was better than the method of PLS. The impact of the water quality parameters on prediction model was discussed by the means of deleting the water quality parameters one by one.
Compliant Control for the Redundant Dual-Arm Live-Working Robot
Authors: Gao Huan Bing , Lu Shou Yin , Tian Guo Hui
Published: October 2013

Two arms are attached on the live-working robot for cooperating jobs and some task requiring larger stiffness such as pushing and butting when replacing cross arm or insulator. The different kinematic structure of this two arms brings many difficulties to get the dynamic model of the total system. This paper proposes a force control method to solve this problem. Two arms are considered as one arm firstly, then the general stiffness matrix is obtained. And based on the compliant relationship between the dual arms and the environment, the force control method for the exact force control is presented. The scheme is experimentally tested on the live-working robot, and the effectiveness and rapidity is validated .
Corrosion of Copper Pipeline Systems under Different Flow Conditions
Authors: Liptakova T. , Alaskari A. , Dodek A. , Fajnor P.
Published: October 2013

In the current study, the material corrosion behavior and degradation of a closed-loop copper piping systems were investigated taking temperature and flow parameters into consideration. To simulate the practical environment conditions, two identical copper closed-loop piping systems were constructed with three types of joints. Both systems were filled with 3% sodium chloride solution and run for about eleven months period. They were heated to a temperature of 80°C for eight hours a day and for 5 days a week. Outside that heating period, systems were maintained at room temperature (23± 2°C). Within such a heating interval, the contained solution for one system was kept in stagnation condition while it was flowing at input velocity of 0.27 m/s for the other. For both systems, the corrosion was then assessed and quantified using different evaluation techniques: Potentiodynamic test, Pourbaix diagrams, light microscope and scanning electron microscopy (SEM). The experimental results confirmed a diverse significant influence of solution flowing conditions on the damage of copper pipes.