bluuebunny/crossref_metadata_2025 huggingface dataset:
The Microstructure and Electrical Property of Porous Cu Film on Soft PVDF Substrate
Authors: Wang Xue Hui , Tang Wu , Yang Ji Jun
Published: February 2012

The porous Cu film was deposited on soft PVDF substrate by magnetron sputtering at different sputtering pressure. The microstructure and electrical properties of Cu films were investigated as a function of sputtering pressure by X-ray diffraction XRD and Hall effect method. The results show that the surface morphology of Cu film is porous, and the XRD revealed that there are Cu diffraction peaks with highly textured having a Cu-(220) or a mixture of Cu-(111) and Cu-(220) at sputtering pressure 0.5 Pa. The electrical properties are also severely influenced by sputtering pressure, the resistivity of the porous Cu film is much larger than that fabricated on Si substrate. Furthermore, the resistivity increases simultaneously with the increasing of Cu film surface aperture, but the resistivity of Cu film still decreases with the increasing grain size. It can be concluded that the crystal structure is still the most important factor for the porous Cu film resistivity.
The Dynamic Response and Sensitivity Analysis of the SFD-Sliding Bearing Flexible Rotor System
Authors: Wang Ji Yan , Zhao Yu Cheng , Wang Chao
Published: February 2012

The paper established the mechanical model of SFD-sliding bearing flexible rotor system, adopting Runge-Kutta method to solve nonlinear differential equation, thus acquiring the dynamic response and the unbalanced response curve. The study has shown: from stable periodic motion, the route of the flexible rotor system to go into chaos is: periodic motion—quasi-periodic motion—chaos—period doubling bifurcation—chaos. The paper analyzed the sensitivity of the first two critical speeds of flexible rotor system, offering design variables for optimization analysis, improving the efficiency of optimization and shortening the design cycle.
A Novel USB Key Design with Online Emulation Debugging Functions
Authors: Miao Quan , Yuan Dong Feng
Published: February 2012

This paper presents a novel design scheme on USB key device. The design use Oregano Systems 8051 IP core. Compared with the standard 8051, Oregano Systems 8051 has 10 times the performance improvements at the same frequency. Details of the design internal structure and novel online debugging mechanism are introduced. The design allows online debugging on USB key, greatly accelerates the development process. The design has been implemented on Altera’s Stratix FPGA and got practical verification.
Numerical Investigation of Effect Pilot Injection on Combustion Noise and Exhaust Emission of Diesel Engine
Authors: Xuan Tie Min , He Zhi Xia , Jiang Zhao Chen , Yan Yi
Published: February 2012

Numerical Investigation of Effect Pilot Injection on Combustion Noise and Exhaust Emission of Diesel Engine The traditional mechanical fuel supply system has already been no way to satisfy the requirement of more stringent fuel consumption and emission legislation. For the past few years, it has been a hot topic to improve performance of diesel engine combustion and emission through optimizing the fuel injection strategy. All kinds of spray, combustion and emission models were studied and then the numerical models for the single-injection combustion of 1015 diesel engine were setup and validated through comparing with results from experimental data. With the above verified models, different injection strategies were further investigated to get the effect mechanism of pilot injection (PI) timing and quantity on combustion noise and exhaust emission.
An Automatic Information Extraction Method Based on the Characteristics of Patent
Authors: Hou Chao Yi , Li Wen Qiang , Li Yan
Published: February 2012

As a huge knowledge base, patent, including a mass of invention information, has the power of balance in product innovation. Based on the fact that some fixed phrases are included in the patent, e.g.” the existing technical problems”,” the advantage of the invention”, this paper codes these phrases and programs with related software to realize extracting information from the patent’s background, technical proposal, advantage and so on automatically. At last, an application of the method is listed to show detailed process.
Fatigue Life Evaluation on the Seam Welds in the Main Rotation Platform of YTQH800
Authors: Liu Ben Xue , Yang Hong Pu , Xiao Xin Ke , Yang Zhen Bo
Published: February 2012

The fatigue life of the rotation platform of YTQH800 was evaluated based on transient dynamic calculation by using normal stress method in LMS VL. According to the evaluation, fatigue hot spots were predicted. A 3D sub-model with R=1 mm notches was built at one of the hot spots with the highest fatigue damage predicted previously. The stress history is obtained by transient dynamic computation. The detailed fatigue life was obtained by using notch stress method in LMS VL. The results provided technology supports to the structure optimum and improvement.
Study of Numerical Problem Based on the Extended Finite Element Method
Authors: Zhang Di , Wang Feng , Xu Hui
Published: February 2012

The extended finite element method (XFEM) provides an effective tool for analyzing crack problems.The control equations and the weak form can be established through balance equations ,boundary condition, geometry equations,etc.After the establishment of stiffness matrix,the crack problems can be solved by XFEM conveniently.
Method and Application of RBF Network Structure Optimization
Authors: Han Zi Bo , Yang Jin Fang
Published: February 2012

The hidden unit number of RBF neural networks directly influences the performances of the whole net. A new strategy to prune the hidden units based on the singular value decomposition (SVD) of matrixes is proposed in the paper. At the basis of a structure involving enough more hidden units, the paper analyzes the outputs corresponding to some training samples with the SVD method and finds out the internal relations of them, then removes redundant ones according to the contribution rate of every hidden unit to the whole network, simplifies the structure of RBF neural network at last. The optimized network has strong generalization ability with simpler structure. At the end of this paper the new strategy is successfully used in the main steam system modeling of power plant and confirmed by simulation experiments.
Design and Study of a Phase Change Micro-Channel Heat Sink
Authors: Wang Dong Fang , Wu Yu Ting , Liu Bin , Ma Chong Fang
Published: February 2012

It is difficult to cool high thermal flux electronics by traditional methods such as air cooling, common liquid cooling and so on. However, vapor compressor refrigeration system is an efficient approach to solve this problem. Heat sink is important equipment in system, so the goal of this paper is to design a heat sink which is similar to an evaporator in vapor compression system with head load 100W. Mathematical model of heat sink is set up. Different heat flux, pressure drop, heat transfer area and weight with different micro-channel width are obtained finally.
Investigation of Conducting Pins in Sphere Filled with Phase Change Material for Enhancing Heat Transfer in Thermal Energy Storage
Authors: Mohd Amin Nasrul Amri , Bruno Frank , Belusko Martin
Published: February 2012

The utilisation of phase change material (PCM) for thermal energy storage (TES) can significantly enhance the energy savings achievable with renewable thermal systems. Sphere based packed bed systems have been used as TES for many years. However, due to the thermal resistance within these systems, the heat transfer is limited and not all the PCM can be used effectively. This study focuses on heat transfer enhancement options for single PCM sphere in a TES system. An experimental investigation has been conducted using water as the PCM. The thermal performance of plain plastic sphere containing PCM has been compared to plastic sphere encapsulated with conducting pins. The heat transfer rate of the sphere with conducting pins was more than 34% that of the sphere without pins.
Research of Three-Dimensional Parametric Design System Based on Case-Hardened Machinery Product
Authors: Niu Hong Bin , Li Xiao Hua , Cai Gang Yi
Published: February 2012

Aimed at the characteristics of case-hardened machinery products, a realization method of three-dimensional parametric design system based on case-hardened machinery products was developed. Example certification demonstrated the feasibility of design system, which improves design efficiency greatly.
Machining Parameters Optimization for Form Milling the Gear Using Improved Harmony Search Algorithm
Authors: Jia Xin Jie , Deng Xiao Zhong , Su Jian Xin
Published: February 2012

Machining parameters optimization in face-milling the hypoid gear was often needed in order to obtain lowest cost or highest productivity. In this study, the optimum value of machining parameters including feed rate, rotation speed are obtained using improved harmony search algorithm(IHSA), to yield minimum total time while considering constrains such as allowable cutting speed, tool life and machine tool capabilities. Results indicate that the IHSA converged to optimum solution with similar accuracy in comparison with the genetic algorithm (GA).
The Application of CLS Algorithm in the Quantitative Analysis of Lime in Wheat Flour by NIR Spectroscopy
Authors: Wang Dong , Ma Zhi Hong , Pan Li Gang , Zhao Liu , Han Ping , Wang Ji Hua
Published: February 2012

Classical least square (CLS) algorithm is applied in this thesis to develop the raw spectra corrected peak area model, the raw spectra corrected peak height model, the 2ndderivative spectra corrected peak area model and the 2ndderivative spectra corrected peak height model by NIR spectra data of the wheat flour samples with lime added in. The result indicated that the correlation coefficients of the 4 models are 0.9321, 0.9483, -0.9491 and -0.9482 respectively; the result of F-test indicated that a remarkable correlation exists between the specified values of lime in wheat flour and the the raw spectra corrected peak areas / heights or the 2ndderivative spectra corrected peak areas / heights, which indicated that CLS algorithm has a certain potential application in the quantitative analysis of lime in wheat flour by NIR spectra data. Meanwhile, the result of F-test indicated that a very remarkable correlation exists between the estimated and specified values both the calibration set and external validation set of the 4 models. The limit of detection of the 4 models are 4.83 %, 4.14 %, 4.14 % and 4.17 % respectively, which will be suitable for the rapid quality screening for the wheat flour in the market and will be of great importance to the quality screening of wheat flour in the market, guarantee of the customers' health and the design and manufacturing of the special NIR spectrometer.
Numerical Simulation of Temperature Field for TIG Welding of Aluminum Alloy Sheet Based on the SYSWELD
Authors: Guo Zheng Hua , Ou Xian Yin , Shuai Ge Wang , Chen Yu Hua
Published: February 2012

Using SYSWELD to simulate welding temperature field for TIG welding of aluminum alloy sheet, The transient temperature field distribution and features of the thermal cycle curve is given. As a result, the calculated data is in good agreement with literature data, the model can provide a basis for technical parameters optimization during the process of TIG welding of aluminum alloy.
Fabrication and Construction of Large Scale Aluminum Target Chamber for SGIII
Authors: Xu Yuan Li , Liu Hui Lin , Wu Wen Kai , Zhu Ming Zhi
Published: February 2012

This paper presents the fabrication and construction of the aluminum target chambers for SGIII laser facilities. The technical difficulty of the vacuum seal weld for the large scale aluminum target chamber has been overcome by using the special designed processing fixtures, the support and clamp fixtures, and double face multi-pass GMAS process in protective temporary enclosures. The mean pointing error of the 144 ports of the TIL chamber is 0.09mm on NC machine tool through the special designed index rotate mechanism. The field precision fabrication and construction of SGIII chamber has been achieved by the special drilling machine for accurately boring holes, the special fixture for accurately positioning the ports in the holes for welding, the laser tracker, the adjustment mechanism, and the custom machined spacers. The alignment error is 0.3mm to 0.4mm. The helium spray probe leak testing and the nondestructive inspection were employed to ensure the vacuum performance. The whole vacuum leak checking has been done. The integrity leak rate of the target chambers were less than 1×10-10Pa.m3/s. The shooting experiments showed that both chambers have satisfied the vacuum and precision requirements of experiments.
W/O Microemulsion Preparation of ZnSe Nanometer Materials Characterization
Authors: Dong Cui Zhi , Zhang Li Fang , Cui Zhi Min , Zhang Ming Xi , Zhang Qing Jun
Published: February 2012

ZnSe is important Ⅱ-Ⅵ semiconductor luminescence materials, and it is the structure of sphalerite and is the face-centered cubic crystal. W/O microemulsion method has the peculiarity of tester simpleness, easy manipulation, room temperature react etc. In this paper ZnSe nanometer line was synthesized in CTAB/cyclohexane/isobutanol/water quatemary microemulsion system. The morphology of the final products were characterized by transmission electron microscopy. according to the means, this paper researches the effect of aging time and the reactant contentration to nanometer materials. The result is that the nanometer line can be obtained through the different reactant concentration and the aging time under certain conditions. Finally, according to TEM chart, this paper infers the formation mechanism of the ZnSe.
Study on the Relationships between the Optical Density and Ink Film Thickness Based on the Offset Overprint Trapping
Authors: Yang Yong Gang , Gao Qiao Zhuo , Jiang Chao
Published: February 2012

The research finds out some existing certain regularity, and further revises the formula D=D∞(1-e-ml). The formula means the relationship between ink thickness and ink in density. By using the formal of one-color ink thickness and ink density, the second density that correspond the first major density is transferred to the equal thickness. Then they are added together. According to the formula the real ink density is calculate. Then use the above formula to work out ink thickness. In this way, overprint densities come out, and make contrast with the actual measure data, so the new model formula is built up. The result shows that the average error between the overprint density calculated by ink thickness and the actual measure data is about 0.07. However, the average error between the calculated density using the simple adding method and the actual measure data is about 0.5, so this method is practical and more accurate.
Numerical Simulation on the Parallel Combined Nozzles of Mini/Micro Gas Flow Standard Device
Authors: Meng Jin Long , Yin Zhao Qin
Published: February 2012

The flow characteristics in mini/micro sonic nozzles have been studied in this paper using the computational fluid dynamics (CFD) method. The result shows that the flow rate of the parallel combined nozzles is not equal to but smaller than that of the sum of the nozzles. The reason is the each effect of the air after nozzles, which changes the flow field parameters .The more number of the parallel combined nozzles, the bigger error exits between actual flow rate and that of the sum of the nozzles. The result is consistent to the experiment. The study also shows the smaller of the nozzle’s diameter, the bigger error exits.
Numerical Simulation of Upsetting Process of External Upset Tubing
Authors: Wang Peng , Hu Mei Juan , Shen Zhao Xi , Li Lei , Liu Wen Hong
Published: February 2012

API external upset (EU) tubing connection was applied extensively, which could ensure the enough joint strength. The end upsetting of EU tubing was the complex forming process containing upsetting, expanding and extruding, which played the important role in the EU tubing manufacture process. In this paper, the numerical simulation of end upsetting process of EU tubing was performed, which was helpful for optimization of technical process and mould.
Static and Dynamic Characteristics Analysis of a High Speed CNC Lathe Feeding System
Authors: Liao Ping , Deng Fang Ping , Ding Rui Ming , Wu Yu Xin
Published: February 2012

This paper focuses on the static and dynamic characteristics of a high speed CNC lathe feeding system, which is analyzed by using the Finite Element Method (FEM). In this study, the location of the maximum stress and deformation is demonstrated and checked, natural frequency and corresponding vibration modes is extracted and analyzed respectively, and the way to build finite element model is simply conducted. Furthermore, vibration testing of the feeding system in X, Y, Z-Direction is carried out respectively, both the theoretical analysis and test results show good agreement with each other. Finally, some conclusions and reviews are made based on the analysis results, which provide some reliable basis for the reasonable operation and static and dynamic characteristics’ improvement for the feeding system.
The Structure Optimization Design of Cutting Disc of Defibrator Based on Monte Carlo Method
Authors: Ma Hong Bin , Ma Yan , Tan Guang Yu , Guo Xiu Rong
Published: February 2012

This paper aims at the factors that the design needed to be considered. There are diameter and structural of defibrator millstone and the rotational speed and torque of millstone and so on. To optimize the cutting disc size and subarea size and the number of cutting disc fan block etc. which will influence the indicator of performance parameters of cutting disc and to arrive at a more reasonable design parameters via the Monte Carlo simulation method.
Numerical Investigation of the Influence of Friction, Module and Number of Teeth in Forging Process of a Spur Gear
Authors: Hosseinzade Amirhossein , Hossein Pour Komeil , Reza-Kashyzadeh Kazem , Amiri Asfarjani Alireza
Published: February 2012

Among all manufacturing processes, forging has a special place because in this technology, parts with desired mechanical properties and minimum waste of material can be produced. Gear is one of the components of machinery which should have special features such as high strength-to-weight ratio, fatigue and surface abrasion resistance, etc. So, comparing with other methods, gear forging provides above requirements. Moreover, precision forging of gears is one of the appropriate methods for producing this piece because it saves material consumption and reduces machining costs. Extensive studies are carried out on this production method but there are also many aspects to be investigated. Since, without having knowledge of the influence of parameters such as friction conditions, material properties, and geometry of work piece on the mechanics of the process, optimal design of the form, selection of appropriate equipments, and prediction and prevention of defects that may occur is not possible, modelling the process for computer simulation has been given much attention in modern technology of metals forming. The purpose of this study is to examine factors such as number of teeth, modulus and coefficient of friction on load, and the force required for the process which has been studied using finite element method.
Evaluation of Cutting Error in Five-Axis Free-Form Surface Milling for Table-Tilting Type Machine
Authors: Yu Yang , Liu Ping
Published: February 2012

Accuracy of machined workpiece is one of the most important considerations for any manufacturer. The present study aims to establish a new algorithm for evaluating the cutting Error in five-axis free-form surface milling for table-tilting type machine. The cutting error evaluating algorithms consider the kinematics of the machine and the tool geometry as well as the local geometries of the machined free-form surface. Based on these algorithms, the present study develops a new error compensation method. Finally, experimental results show that the tool paths generated by the present procedure have better machining efﬁciency.
Investigation on the Strength Analysis of Vacuum Tank
Authors: You Mei Yan , Zhang Shi Wei
Published: February 2012

A strength analysis on a large-scale horizontal vacuum tank, a dry equipment of the “ two million” large transformers, will be done in this article. Using the means of finite element analysis and two different unit-setting models, we compare the two results getting from the two units. Different lengthen styles of vacuum tank’s reinforced bead will be discussed, as well as different processing styles of welding parts model-setting in ANSYS.
Research of Modeling and Simulation for Warp-Knitted Fabric
Authors: Fang Yuan , Ju Ting Ting
Published: February 2012

A method of the three-dimensional (3-D) simulation for warp-knitted fabric has been presented based on the characteristic structure of the yarn. And a 3-D model for warp loop structure has been established according to the NURBS curves. To make the simulation appear more realistic, a texture technology has been used for the loop model based on computer vision. Combining both Visual C++ and 3-D graphics processing technologies, a simulation program has been developed for the warp 3-D simulation.
Research on 3D Modeling and Virtual Assembly of Quayside Container Crane
Authors: Yan Wei , Liu Jing Shuai , Lu Hou Jun
Published: February 2012

As to the problem that the assembly cycle and costs of quayside container crane always exceeds 40% of the entire production cycle and costs, improving the assembly efficiency becomes an important link to enhance the competence of port machinery manufacturing enterprises. In the product assembling cycle, virtual assembly can help to improve assembly quality and reduce the cost. Based on the physical structure of 45t quayside container crane, 3D components model were developed, the assembly hierarchy and modeling process were provided. The simulation analysis of assembly sequence was taken based on the CATIA DMU platform and virtual assembly animation was generated. The assembly interference detection results were analyzed to verify the part assembling ability, the whole disassembly and assembly process was displayed, which can help the assembly workers making visual analysis of fitting operation rationality.
Molecular Dynamics Simulation for Crack Propagation in Magnesium Alloy
Authors: Ding Jun , Huang Xia , Li Wen Zhong , Zeng Xiang Guo
Published: February 2012

In this work, crack initiation due to the pre-existence of an initial crack has been predicted according to the criterion of critical stress intensity factor and succeeding crack evolution and propagation are also been performed using molecular dynamic (MD) method in combination with finite element method (FEM). The modified embedded atom method potentials were employed to characterize the interaction among atoms in magnesium alloy in MD simulation. Finite element simulations have been first conducted to provide subsequent MD simulation with boundary conditions constrained at the atoms. The MD simulation shows that atoms around crack arrange disorderly, aggravate rapidly suggesting the onset of crack initiation and eventually results in the failure of alloy specimen. It helps to evaluate the value of critical stress intensity factor for a specific crack configuration, which provides an effective way to determine the stress intensity factor for the specified configuration.
The Mathematical Model of Welding Process Comparative Study of Identification Method
Authors: Wu Jun Feng , Huang Jing
Published: February 2012

The dynamic process of the weld pool is a high complex object with strong nonlinearity, mult-variable coupling and a mount of stochastic and uncertain factors. It is very difficult to obtain an analysis mathematic model of weld pool dynamics. Pulsed Gas Tungsten Arc Welding (GTAW) is an important metal’s welding technology, which has been widely applied in the aerospace and manufacturing areas. Therefore, the dynamic characteristic of the welding process has always been hot and difficult in the field of academic research and engineering applications. In order to solve the difficulties of modeling and controlling of nonlinear system, this paper investigates the dynamic characters of the pulsed GTAW from the classic control systems. It obtains the SISO transfer function model by the area method and least square method. The results of simulation experiment show that the area method is better between the two methods.
Compact Reflection Bragg Grating Based on Metal-Insulator-Semiconductor Structure
Authors: Yang Mo , Song Jin Cheng , Yi Miao
Published: February 2012

An ultra-compact and broad-band Bragg grating based on hybrid plasmonic waveguide is presented and investigated. The Bragg grating is formed by a semiconductor trip which is separated from a metal surface by a nanoscale insulator layer. Simulation results demonstrate that the proposed structure shows the capability of efficient wavelength selection near the telecom bandwidths and transmits the light with a strong mode confinement and low propagation loss. It will have a potential application in the broad-band telecommunications systems and the integrated photonic circuits.
Improving Design of Cricoid Plastic Gating System Based on Moldflow
Authors: Yang Dong Po , Han Jian Min
Published: February 2012

To solve the problems such as poor ventilation and high production costs in the production of cricoid plastics, we analysis the reasons and look for solutions with Moldflow software to guide the new design and manufacturing of the mould. The poor ventilated structure is changed into a ventilation structure. A poor ventilation structure is changed to a good ventilation structure. Injection weight ratio was reduced from 35% to 15% - 20%, the gating system was improved, the molding process was optimized, ensuring product quality and save the cost, produced good economic benefits.
Research of 3D Parametric Design System of Gear Based on SolidWorks
Authors: Li Xiao Hua , Niu Hong Bin
Published: February 2012

General flow of 3D parametric design was put forward according to the characters of gear design in this study. There are three key modules, which include parameters designing calculation of gear, automatic generation of 3D parametric model of gear and automatic generation of gear part drawing, and corresponding solutions were also provided. In final an example verifies the feasibility of the method. 3D parametric design system is one of efficient and reliable modern machine design techniques. The efficiency of gear designing can be greatly enhanced by adopting 3D parametric design system, and meet the needs of modern machine design. In addition, this study gives a use for reference to 3D parametric design system for other parts.
Design of Dual-Channel High-Speed Data Acquisition Card Based on USB 3.0 and FPGA
Authors: Wang Peng , Wu Chen
Published: February 2012

A high-speed data acquisition card using USB 3.0 interface has been designed in order to solve the problem that traditional data acquisition card could not take both data transmission bandwidth and easy connection with PC into account. The data acquisition card controlled the dual-channel 12-bit 20Msps ADC for asynchronous parallel sampling using FPGA as core control module, which made the sampling rate up to 40Msps. The sampled data which was processed by FPGA transferred synchronous from FIFO interface to PC via USB controller. The basic structure of hardware and the basic design method for software and firmware were given in this paper, in which how to use FPGA to realize FIFO was elaborated in detail. The timing simulation of using asynchronous parallel A/D conversion technology and using ADC device of 40Msps sampling rate for FIFO internal data transmission were simulated respectively, thus verified the reliability of asynchronous parallel A/D conversion.
The Research of CNC Processing Analysis and Feed Rate Determination of Scroll Compressor‘s Type Line
Authors: Liu Guo Ping , Song Hong Gun , Liu Qiang Fei , Hu Long Hua
Published: February 2012

The paper based on Mitsubishi M70 NC system, firstly, the theoretical analysis of scroll-type lines and the processing methods have been made, and then focused on the study of the relationship between the C-axis, the X-axis with NC feed rate .Finally, Mitsubishi M70 CNC was used on the fine milling of the scroll plate. The experiment has showed that the result is fine.
Method of Volumetric Error Compensation for 3-Axis NC Machine Tool
Authors: Wang Jin Dong , Guo Jun Jie , Deng Yu Fen , Li Hai Tao
Published: February 2012

Error compensation is an effective method to improve the machining accuracy of NC machine tool. A laser tracker is used to rapidly and accurately detect the geometric error of NC machine tool in the paper. The machine tool is controlled to move on the preset path in the space, and a laser tracker is used to measure the motion trajectory of the machine tool. Each geometric error can be identified by error separation. Based on the error model of 3-axis machine tool, error compensation can be carried out by modifying the machining process (G code). Results of experiment show that, this measurement method is feasible, and modifying the G code for error compensation is also effective.
Receptance Coupling for Micro-End-Milling
Authors: Han Zhen Yu , Zhang Xiang , Fu Hong Ya , Sun Ya Zhou
Published: February 2012

Micro-end-milling tools are suitable for machining miniature parts which have complex shape. As the diameters of tools are too small, cannot directly obtain the frequency response functions (FRFs) through impact hammer test at tool tip. This paper employs Receptance Coupling method (RC), couple the tool tip’s FRFs with machine-toolholder system’s FRF, and then get the micro-end-milling tool’s FRF. Establish the coupling model, then finite element and hammer test of the blank gauge tools are used to obtain the coupling transfer functions (TFs). Then analyze the tool tip model by finite element, couple with the machine-toolholder system hammer test result and coupling transfer functions, finally the micro-end-milling tool’s FRFs are obtained. Through the hammer test of blank gauge tool, the effectiveness and feasibility of RC method are verified. The result shows that the RC method is accurate at micro-end-milling tool in steady state milling.
The Mechanism of Surface Trajectories and Milling Forces in Micro-Milling Processing
Authors: Zhang Jin Feng , Dong Ya Dong , Zhang Yong Zhen , Cheng Jun
Published: February 2012

In practical industrial processing, in order to make the tiny functional devices assembly accuracy as high as possible, which raises an very high requirement for surface quality of micro workpiece. Some of the important factors in controlling the surface quality with the level of the trajectories and forces of the blade across on the workpiece have a great relationship. This paper presents generalized mathematical models of the trochoid and forces combined with the helix cutter geometry used in the industry. And then from both of these aspects analytical laws in-depth of the trochoidal curves and micro-cutting forces variation. It will be of great reference value for the study of micro-milling mechanism.
Study on Application of VSI Q Control Chart in Small-Batch Detection
Authors: Wen Chang Jun , Zhao Li
Published: February 2012

The small batch control chart was advanced in the modern production in order to control the detection process more effectively. The Q control chart got certain applications for the characteristics of its own, but the effect is not outstanding in the beginning of detection. In this paper a method that combined it with VSI was discussed and applied to an example, and was found it is a more accurate and effective method.
An Improved Genetic Algorithm For Just-In-Time Job-Shop Scheduling Problem
Authors: Yang Hong An , Li Jin Yuan , Qi Liang Liang
Published: February 2012

This paper studies a just-in-time job-shop scheduling problem (JITJSSP) in which each operation has an earliness cost or a tardiness cost if it is completed before or after its due date and the objective function is to minimize the total earliness and tardiness costs of all operations. In order to solve this problem, an improved genetic algorithm (IGA) is introduced in this paper. IGA utilizes an operation-based scheme to represent schedules as chromosomes. Then, each chromosome is processed through a three-stage mechanism. Firstly, the semi-active decoding process is employed to expand the search space of solutions and guarantee comprehensive solutions. Secondly, the greedy insertion mechanism for tardy operations is executed to move the tardy operations left to the appropriate idle time to reduce the tardiness costs. Finally, the greedy insertion mechanism for early operations is proposed to shift the early operations right to the suitable idle time to decrease the earliness costs. After the maximum number of generations is reached, IGA continues with selection, crossover and mutation. The experimental results finally show that most of solutions on the benchmarks are improved by our algorithm.
An Integrated Technology for 3D Laser Marking
Authors: Wang Xiao Yu , Zhou Li Wen , Ren Qing Rong , Chen Ji Hong , Tang Xiao Qi
Published: February 2012

This paper proposal an apparatus and processing steps to realize 3d laser marking onto the target's surface directly. A camera is attached to an ordinary inner engraver and laser source is multiple used for measuring and manufacturing respectively. Through steps successively including Camera Calibration, 3D Measuring, Surface Reconstruction, Image Ditching, Texture Mapping, Computer Aid Design (CAD), Computer Aid Manufacture (CAM) Calculation and Computer Numeric Control (CNC) Control, an inner engraver can become a 3D marking machine in a manner which is both novel and cheap.
Clam Shell Compression Characteristics and Bond Strength
Authors: Ma Yun Hai , Chai Xing Wang , Yan Zhi Feng , Chen Dong Hui , Man Jiang
Published: February 2012

In the study, based on existing shells, clam shells for the study to focus on its combination of strength and deformation characteristics were investigated. Analysis of the microstructure on the mechanical properties of clam shells, aragonite sheet comparison between the critical load Lc1 and the prismatic layer of aragonite layer between the critical load Lc2 changes, discussed the critical load overall mechanical properties of materials influence. The results showed that, vertical clam shell when the growth surface can carry the load the maximum stress is mainly concentrated in about 55MPa. Along the growth direction of the load, the maximum stress range between 48.5MPa-61MPa, as opposed to vertical loading and stability. Compressed prismatic layer and nacreous layer of the maximum intensity was significantly higher than the overall compressive strength, maximum strength of layered compression is about 2 times the overall compressive strength, direction perpendicular to the surface when the load curve showed the characteristics of ceramics. Clam shell aragonite between the critical load for the chip 90N, prismatic layer and nacreous layer between the critical load of 120N. In this process, the emergence of brittle fracture characteristics of ceramics, and when the nacre is broken, there was even a class of metal material slippage.
Finite Element Analysis of Deep Transverse Metatarsal Ligaments Mechanical Response during Landing
Authors: Gu Y.D. , Rong M , Li Z.Y , Lake M.J , Ruan G.Q
Published: February 2012

The deep transverse metatarsal ligaments (DTML) play an important role in stabilizing the metatarsal bones and manipulating foot transverse arch deformation. However, the biomechanical research about DTML in the foot maneuver is quite few. Due to the difficulties and lack of better measurement technology for these ligaments experimental monitor, the load transfer mechanism and internal stress state also hadn’t been well addressed. The purpose of this study was to develop a detailing foot finite element model including DTML tissues, to investigate the mechanical response of DTML during the landing condition. The DTML was considered as hyperelastic material model was used to represent the nonlinear and nearly incompressible nature of the ligament tissue. From the simulation results, it is clearly to find that the peak maiximal principal stress of DTML was between the third and fourth metatarsals. Meanwhile, it seems the DTML in the middle position experienced higher tension than the sides DTML.
Research on the Knowledge-Based Multi-Dimensional Information Model of Manufacturing Capability in CMfg
Authors: Luo Yong Liang , Zhang Lin , Zhang Kui Ping , Tao Fei
Published: February 2012

Cloud manufacturing (CMfg) is a new service-oriented, highly efficient, lowly consumption knowledge based, and intelligent networked manufacturing model. It aims to achieve on-demand use, dynamic collaborative work, and circulation of manufacturing resources and manufacturing capability(MC). In order to achieve the above goal proposed, how to realize the formal description of MC is the key point in CMfg. This paper emphasizes the multi-dimensional information model of MC based on knowledge. According to the requirement and characteristics of manufacturing, the concept and connotation of MC were presented firstly in this paper, then the multi-dimension information model for MC was proposed based on knowledge, it contains three dimensions, such as elements dimension, relationship dimension, evaluation dimension.
Protection & Coordination of Pharmaceutical Safety Responsibility Based on TPL
Authors: Meng Jong , Guo Chun Xia
Published: February 2012

By using the basic idea of logistics and supply chain management, this paper researches on Protection & Coordination of Pharmaceutical Safety Responsibility Based on TPL. The result shows that:From the macro and micro perspectives, protection & coordination of pharmaceutical safety responsibility play an important part in guaranteeing biopharmaceutical product safety, promoting biopharmaceutical enterprises' performance，strengthening supervision on biopharmaceutical product safety and advancing the service level of government supervision, which is also of guiding significance and practice value for high efficient operation and decision of biopharmaceutical supply chain.
Parameters Performance to the Vibration Isolation in Three-Dimensional Elastic Floating Raft Isolation System
Authors: Jiang Guo He , Wu Gang
Published: February 2012

Based on the three-dimensional elastic floating raft isolation system model, this paper using the finite element method to calculate vibration response of the system, and then analyze the performance of floating raft under different mass and stiffness, providing useful conclusions for vibration isolation designing.
Research and Application of Combinational Demulsifier
Authors: Lou Yan Min , Zhang Yong Hui , Zhang Yong Kun , Liu Qing Wang
Published: February 2012

The dehydrationrate of Daqing crude oil was not stable and the amount of chemical demulsifier used too much, which caused serious environmental pollution and enlarged the difficulty of dealing with crude oil. Therefore, PRJ-1 bio-demulsifier was selected to combine with chemical demulsifiers SP-169 and GT-D01, respectively, to resolve the crude oil emulsion of Daqing. The results showed that PRJ-1 can combine with SP-169 efficiently. The demulsification efficiency was high and dehydrated water was clear. However, the demulsification efficiency increased a little with GD-D01. The study shows that efficient synergetic effect between PRJ-1 and SP-169 was confirmed. The suitable proportionality of combinational demulsifier is 1:1 and the demulsifying effect can meet requirement of oilfield demulsifiers currently.
Study Affection of Nano-Al2O3 Additive on the Corrosion Resistance of Micro-Arc Oxidation Film of Titanium Alloy TC4
Authors: Wu Pei Nian , Niu Guo Jun , Xi Jian Jun , Zhao Jun
Published: February 2012

Study the affect of nano-Al2O3 additive on the MAO film of titanium ally, the affect of nano-Al2O3 additive on the surface morphology and the thickness is not remarkable, but the nano-Al2O3 additive is good to improve corrosion resistant of the film. The mechanism of nano-Al2O3 additive improving corrosion resistant of the film is that: on the one hand is improving the content of α- Al2O3 in the film, on the other hand is decreasing the size of the pore area of the film and improving the dense of the loose and compact layer.
Vibration Analysis of Radial Drilling Machine Structure Using Finite Element Method
Authors: Kumar Rajiv , Garg Mohinder Pal , Sharma Rakesh C.
Published: February 2012

Manufacturing industries now a days have stringent expectation from the machine tools in terms of productivity as well as quality of products.Vibration plays an important role in determining the quality of product.If the pattern of vibration prevailing in the machine tool during cutting is known,then machine tool structure can be designed in such a way so that natural frequency of machine tool structure can be isolated from the forced frequency.So, this study is focused on finding the natural frequency and mode shapes of radial drilling machine structure.Finite element analysis has been done to find out the natural frequencies and mode shapes of radial drilling machine structure.Assembled mass and stiffness matrices are obtained for each element and solved by using inverse iteration technique.
CFD Study of Wake Interaction of Two Wind Turbines
Authors: Chen Zi Xi , Marathe Neha , Parameswaran Siva
Published: February 2012

Understanding the wake behavior properly would help in designing proper layouts of wind farms to obtain maximum power and improved turbine life. This research aims at studying the impact of power of a turbine that is in the wake of another turbine under uniform inflow condition. Computational Fluid Dynamics (CFD) simulations are carried out to represent the velocity deficit behind two turbines in-line with the wind using the Virtual Blade Model (VBM). Power loss of the second wind turbine located at different distance downstream is also calculated.
Ultranarrow Gap Welding with Constrained Arc by Flux Strips
Authors: Zhu Liang , Pan Yan Li , Li Yuan Bo
Published: February 2012

Ultranarrow gap welding with the gap of less than 5mm was executed successfully. In order to prevent the arc from being attracted by sidewall and going up along the sidewall, the flux strips consisting of the specified aggregates are placed onto the sidewalls to constrain the arc. This technique was tested on the welding experiment of pipeline steel with thickness of 30mm. The involved welding parameters were obtained. The width of gap is 4mm, the welding voltage 20~24V, and the heat input 0.6 KJ/mm. The cross sections of weld profile were analyzed. The width of heat affected zone is relatively narrow and about 1.3mm, and the weld hardness is much higher than that of HAZ and base metal.
The Formation of Adiabatic Shear Band and Analysis of its Characteristics in the Process of Penetration
Authors: Li Jin Quan , Wang Sheng Xu
Published: February 2012

The characteristics and causes of the formation of adiabatic shear bands (ASB) in 30CrMnMo armor steel plate are analyzed by shooting 93W projectiles. The results show that adiabatic shear bands do not occur in the initial stages of the opening-crater and plugging. Adiabatic shear bands distributed sparsely appear in the stable penetrating phase because of the necessary strain volume. Adiabatic shear bands are formed along main shear stress lines at an angle of about 450 in relation to the penetrating direction. These are approximately consistent with the direction of the plastic deformation slip line. The non-homogenous deformation and centralizing of stress and strain inside the adiabatic shear band causes micro-cracks and micro-bores during cooling of the plate.
Make WPC Products More Beautiful by Secondary Processing
Authors: Wang Yi Gong , Chen Zhong Zhong
Published: February 2012

The secondary processing of WPC (wood-plastic composite, WPC) is a necessary method to make its productions more beautiful while it is applied in furniture, sanitary location, bathroom and other fields. Although there is widespread availability of WPC abroad, such as building, municipal installations, packing and other occasions, but on the contrary, there is little application in our country. As a substitutes of wood, WPC has many excellent performances such as light weight, high rigid, water resistance, insect resistance, acid and alkali resistance etc, it can be nailed, drilled, planed, sawed, agglutinated and painted like lumber. Furthermore, it can be extruded as thermoplastics, and decorated by printing or spraying. In this research, problems of WPC popularization in domestic furniture market are clarified by analyzing the material performances and consumer mentality.
Research on Renitrocarburizing of Mechanical Element
Authors: Shi She Xuan , Wang Zhong Ya
Published: February 2012

Analyzes the reason why renitrocarburized element could not get desired surface quality as the first. Improve the craft. Conduct trial and testing. The surface hardness and compounds layer depth of the Renitrocarburized element can back to the same level as the first time. Furthermore, the infiltration layer microstructure is consistent with that in the first nitro carburizing.
A Time-Series Trend Forecast Method Based on Principal Component Analysis
Authors: Wei Shu Di , Zhao Hui Huang
Published: February 2012

The time-series is the collection of chronological varying numerical ordered by time. It has a wide existence of image data, text data, hand-written data and the brain scan data patterns. The present research of time-series concentrates on series data transformation, similarity search, forecast, classification, clustering and Visualization etc. Furthermore the trend forecast of time-series is the major basis of other related research. This paper analyses the existing time-series forecasting methods and puts forward a new time-series method based on principal component analysis. The example tests the validity of the method of other related research.
Discussion on the Utilization of Forestry Resource Data to Update Basic Geographic Information Data
Authors: Lai Li Fang , Zhang Yu Fen
Published: February 2012

Along with the rapid development of economy, strong demand has been put on the application of basic geographic information data which needs timely updating. It has become a subject to be further investigated to make full use of other data (such as forestry resource data, land survey data, etc.) to effectively add new data when the basic geographic information data is updated and ensure the timeliness of basic geographic information data. This paper gives an instance to describe and discuss a novel method, whose purpose is to quickly update basic geographic information data by forestry resource data on MicroStation V8 platform.
Automatic Processing System of Welding Spots in Auto-Body Welding Lines
Authors: Zhu Bin , Wang Yan Tao , Yu Tao
Published: February 2012

Assigning welding spots to stations in the design of an auto-body welding line is a tedious job and error-prone. In this paper, an automatic processing system of welding spots has been implemented on the platforms of the commercial software, CATIA and Solid Edge. The geometric feature based technology is used to recognize welding spots automatically. The corresponding station is found for each welding spot according to the order of stations and the types of welding spots automatically. The system provides other convenient functions to facilitate the processing of welding spots as well. It has been used in the design of auto-body welding lines very successfully.