bluuebunny/crossref_metadata_2025 huggingface dataset:
The Improvement of Wavelet Packet for Psychoacoustic Model
Authors: Zhou Jing Lei , Li Ying
Published: November 2012

Compared with common psychoacoustic model, this article uses wavelet packet decomposition to decompose a signal. This method improves the situation of insufficient time-frequency resolution which the uniform spectrum analysis causes. In addition, frequency division by wavelet packet decomposition is much closer to human’s critical band than the way common psychoacoustic model getting, it is more suitable to human’s hearing characteristics. So we can use wavelet packet decomposition replace FFT in MPEG, and get accurate psychoacoustic model.
Using Parameter Joint Model to Predict the Grain Yield of Guangxi Province
Authors: Li De Wang , Qiu Mei Lan
Published: November 2012

The principle of the Markov chain model is described in this paper, based on the combination forecasting thought and Markov chain thinking, we combine joint forecasting model with the state of the Markov chain transfer model , which is better reflected the law of development of the system of things. We get with parameters in the joint model, and use the joint model to predict the Guangxi food production. Based on historical grain yields data from 1964 to 2011 and the nature of the growth curve regression equation, we establish parameter joint prediction model of Markov and the quadratic function growth curve, which can predict the future grain production of Guangxi province, and we could proof its feasibility. The accuracy of parameter joint model prediction is high, which can be validated by historical grain yields data.
Design of New Dual-Motor Independent Drive System for Electric Vehicle
Authors: Wang Wen Wei , Lin Cheng , Cao Wan Ke , Chen Jiao Yang
Published: November 2012

Multi-motor wheel independent driving technology is an important direction of electric vehicle(EV). Based on the analysis of the features of existing independent driving system of electric vehicle, a new dual-motor independent driving system configuration was designed. Complete parameters matching and simulation analysis of the system include motor, reducer, and battery. Distributed control network architecture based on high-speed CAN bus was developed, and information scheduling was optimized and real-time predictability was analyzed based on the rate monotonic (RM) algorithm and jitter margin index. The vehicle lateral stability control was achieved based on coordinated electro-hydraulic active braking. Based on the new dual-motor independent driving system, a new battery electric car was designed and tested. The results show that the vehicle has excellent dynamic and economic performance.
Research on the Selection of Modes of Recycling End-of-Life Appliances Based on AHP
Authors: Jiang Wei Fan
Published: November 2012

As the number of household appliance increasing, and the number of waste products has increased dramatically, these waste electrical appliances’ processing not only bring huge economic expense, and a lot of waste electrical appliances influence ecological environment and the human health. Recycling economy requirements enterprise to reduce energy consumption, and improve the utilization of the resources Focused on the issue of recycling end-of-life appliances, this paper presents three modes of recycling end-of-life appliances, which are self-supporting mode, outsourcing mode and joint management mode, and analyzed the characteristics and application areas respectively. According to the characteristics of the three modes, this paper presents the evaluation index system, and compares each evaluation index. At last, this paper uses the AHP method to choose the mode of recycling end-of-life appliances.
Research of Modular Experimental Production System
Authors: Cao Dong Mei , Li Dong Bo , Yu Fei
Published: November 2012

On the basis of former researcher domestically and abroad about flexible production system technologies, the experiment platform for modular flexible manufacturing system (KNT-FMS) is designed and implemented according to customers’ requirements. After analysis of system requirements, the architecture of modular flexible manufacturing system (KNT-FMS) is constructed. Then the design and implementation of production status recognition and monitoring are focused on. Finally, the application of monitoring system is illustrated by an example of 11-stop experimental flexible manufacturing system. The experiment platform can train professional skills for the students and engineers before working through simulating the work conditions of factual production system so as to shorten the gaps between theory and practice and improve the comprehensive skills all around. Also it provides practical training equipments for training applicable skilled talent and is of application value.
Application of IRP Technology in the Informatization Construction of Vehicle Maintenance Support
Authors: Chen Yu , He Yu , Fu Yu
Published: November 2012

Information resource planning （IRP）is a unified planning for the collection, processing, storage, transfer and usage at all stages of information. IRP is the foundation engineering and pilot engineering for the informatization construction of vehicle maintenance support. As an important and standardized project in the informatization construction of the vehicle support, the operation of IRP for vehicle maintenance information will play an important role in promoting and improving the informatization construction level of the vehicle support. This paper introduces several basic concepts in IRP first, then discusses the implementation procedures of the IRP of vehicle maintenance support, and analyzes the whole solutions for the informatization construction of vehicle maintenance support finally based on IRS.
The Research of Remaining Oil Distribution in High Water Cut Oilfield
Authors: Fu Cheng , Huang Bin
Published: November 2012

The western South-eight block which is located in the comprehensive tap demonstration area of NO.2 oil production plant, has already gone through three years’ fine development. The production has been stable, the rising amplitude of comprehensive water cut has been small, and the natural decline rate has been controlled effectively. But with the deep development, this block has gone into the late ultra-high water cut stage. To maintain high efficient water flooding development is more and more difficult, therefore fine 3D geological modeling and reservoir numerical simulation work have been carried out. And some practical residual oil saturation diagrams have been put forward finally towards this block, which has provided a reliable basis for the next oilfield development.
The Convergence Rate with Bootstrap for Multidimensional Density Functional Kernel Estimation
Authors: Li De Wang
Published: November 2012

Bootstrap method is a statistical method proposed by the American Stanford University professor of Statistics Efron, which belongs to the parameters of statistical methods. According to a given sub-sample, we do not need its distributional assumptions or increase the sample information which can be described the overall distribution characteristics of statistical inference. The basic idea of the Bootstrap statistics is unknown and can not repeat the sampling distribution function instead of using a repeat sampling of the distribution function estimates. The independent identically distributed random variable series ,have the common probability density function, with .In the paper, combining with multidimensional density function, we discuss the convergence rate with Bootstrap method for the kernel estimation of the density functional .
Technical Factors’ Measurement and Simulation in the Equipment’s Stability Investigation
Authors: Zhao Yin Yan , Cheng Nong , Xiao Tian Yuan
Published: November 2012

It is difficult to model and simulate the technical factors’ effects on system stability for their indeterminate and complex features. Experimental investigation is one of the most important means to solve complex engineering problems, as well as a supplier of indispensable simulation modeling evidences of many perplexed factors. Angio-cardiographic equipment is as a case here and its C arm’s rotation speed stability is investigated through experiments. The speed curves’ trends and stabilities in different working conditions are generalized and their interfering technical factors are analyzed. The gear meshing clearance and the unbalanced gravity moment, which is found through analyzing experimental results, are included into simulation models and the simulation precision is acceptable. These give strong supports for following simulation work.
The Research of Factors which Effect B2C E-Commerce Trust - Based on the Mechanism of Process
Authors: Wu Xian Feng , Zhou Jing , Yuan Xu
Published: November 2012

With the continuous development of Internet, e-commerce has become flourishing, among which B2C e-commerce has developed especially rapid. However, the problem of consumer trust has become one of the main factors that has hampered the development of B2C e-commerce. This paper focuses on discovering the factors which influence the consumer trust in B2C e-commerce and establishing the consumer trust model of B2C e-commerce. This paper applies the mechanism of process to the B2C e-commerce creatively, then comes up with six stages of e-commerce shopping process, and refines the impact factors for each stage, and finally builds the consumer trust model of B2C e-commerce based on the mechanism of process. As online suppliers have control in the factors I have proposed in my research, the model is helpful not only for theoretical use, but for guiding cyber-marketing practices of enterprises.
Roundness Error Measurement of Shaft Parts Based on Virtual Instrument
Authors: Jiang Feng Guo , Zhu Bin , Wang Yan Tao , Liu Peng
Published: November 2012

Roundness error is widely measured in machinery industry, but existing roundness error measuring instruments have much weakness such as single function and low intelligent level, etc. Aimed at the shortage of traditional roundness error measuring instruments, the roundness error measuring system based on virtual instrument is developed. This system which takes NI LabVIEW8.5 as development platform, evaluates roundness error with the least square method, adopts modular design, combines with 610H IPC, PCI-1716 data acquisition card, stepping motors, LVDT sensor and other hardware can realize fast, precise measurement of roundness error of shaft parts. It is verified to be feasible by measuring standard parts. Compared with the similar product, this system has many advantages such as simple operation, intuitive display, high intelligent level and so on.
Ontology-Based Semantic Description for Substation Devices
Authors: Wang Xin Ying , Yan Lei
Published: November 2012

At present, the development of smart grid has already formed a consensus in the world. As an energy depletion big country, the development of smart grid has very important significance in China. Transformer substation plays a very important role in the smart grid, so do semantic description of substation equipment and improve their interoperability can effectively raise the intelligence application of the transformer substation. The ontology technology based on semantic sharing has unique advantages in describing the concept and relationship. Therefore, to build up ontology for substation equipment and to describe it using the ontology description language-OWL can achieve power equipment information sharing, interaction and processing, which provides a new method to build smart grid.
Stochastic Optimal Dispatch Model Considering Security Risk Constraint
Authors: Zhou Xiong , Yang Hong Ming , Wu Jia Jie , Liu Bao Ping
Published: November 2012

Due to the natural disasters, the transmission line fault has randomness. In order to describe the uncertainty of the transmission line fault, the conditional value-at-risk (CVaR) theory is introduced to quantify the uncertainty risk caused by transmission line failure. A stochastic optimal dispatch model of the power system considering the security risk constraint is proposed in this paper, using the sample average approximation (SAA) method and the analytic method to solve the model. The influence on the result of stochastic optimization dispatching is analysed by different conditional value at risk and confidence levels. The simulations demonstrate that the stochastic optimal dispatch model considering the security risk constraint is reasonable and provides a theoretical basis for the stochastic optimization dispatching of the power system considering line failure.
Influence of Magnetic Field on Aqueous NaCl Solutions: A Foundational Research on the Desalination Method Based on the Rotating Electromagnetic Effect
Authors: Han Hai Bo , Guo Bin , Chai Feng
Published: November 2012

In order to investigate whether magnetic field can improve the seawater desalination efficiency, the influence of magnetic field on the aqueous solutions of NaCl is studied by molecular dynamics (MD) simulations. The results show that, under the influence of magnetic field, the hydration number of Cl- ions increases and the mobility of hydrated Cl- ions is weakened, while the mean size of water clusters decreases and the mobility of water molecules is enhanced. These may lead to higher salt rejection and water flux by the usage of magnetic field in our novel desalination method based on rotating electromagnetic effect.
Coupled Shape and Reentry Trajectory Optimization of Entry Vehicle for Lunar Return
Authors: Wu Xu Zhong , Tang Sheng Jing , Guo Jie
Published: November 2012

This paper deals with the reentry trajectory optimization problem for lunar return with consideration of entry vehicle’s fore-body shape. Three performance objectives are applied in this work: cross range, peak heat flux and total heat load. Aerothermodynamic models are based on modified Newtonian impact theory and semi-empirical correlations for convective and radiative stagnation-point heat transfer. A population based evolutionary algorithm has been executed to optimize the multidisciplinary problem. At last the numerical example showed the Pareto frontiers for spherical segment and sphere cone respectively, one of optimal trajectory designs selected from the Pareto frontiers are showed in this paper. The mission requirements are satisfied through the aerothermodynamic balance.
Development for CAD / CAM System of Modification Slotting Cutter’s Design and Manufacture for High-Speed and Heavy-Loading Gear
Authors: Hu Liang Bin , Li Bi Wen , Li Sheng , Hu Yao Bin
Published: November 2012

In view of the advantages of slotting modification processing and the difficulties in the design and manufacture of Modification Slotting Cutter, development for CAD / CAM system of modification slotting cutter’s design and manufacture for high-speed and heavy-loading gear has the following features:Firstly, the adaptive design of modification slotting cutter is implemented based on different modification target.Secondly,the precise design of modification slotting cutter is implemented by automatic regulating its section line position based on simulation results of the evaluation of the modification. Thirdly, the automatic regulation for fixture system and wire cutting process parameters of modification slotting cutter is implemented based on prediction model of slotting cutter’s pressure angle error, thereby reducing the design and manufacturing difficulty and to improve the precision as well as self-adaptability for modification slotting cutter.
Self-Reduction Quiescent Current Low Power Low Dropout Regulator for SoC Application
Authors: Liang Lee Chu , Sidek Roslina Mohd
Published: November 2012

A low power low-dropout (LDO) voltage regulator with self-reduction quiescent current is proposed in this paper. This proposed capacitorless LDO for Silicon-on-Chip (SoC) application has introduced a self-adjustable low-impedance circuitry at the output of LDO to attain stability critically during low output load current (less than a few hundred of micro-ampere). When the LDO load current increases, it reduces the LDO output impedance and moved the pole towards higher frequency away from the dominant pole and improving the system stability. When this happen, less amount of quiescent current is needed for the low-impedance circuitry to sustain the low output impedance. In this proposed LDO, the quiescent current that been used to sustain the low output impedance will be self-reduced when the output load current increases. Thus, the reduction of quiescent current at low output load current has tremendously improved the efficiency. The simulation results have shown a promising stability at low load current 0~1mA. The dropout voltage for this LDO is only 100mV at 1.2V supply. The proposed LDO is validated using Silterra 0.13μm CMOS process model and designed with high efficiency at low output load current.
Study on Method of Key Target Tracking Parameter Matching
Authors: Pang Xue Liang , Jang Run Xiang
Published: November 2012

This paper addresses the issue of how to get the optimal tracking parameter matching scheme. At first it establishes the comprehensive evaluation system of target tracking parameter matching scheme which includes four indexes such as capturing probability, getting probability and so on. Then based on the AHP it brings forward the evaluation method based on multi-index decision making to realize the optimized scheme evaluation. Because of the number and level of the parameters, there are numerous parameter matching schemes. So it utilized Uniform Design to optimize simulation experiment number and calculated optimized parameters matching scheme by generalized regression equation. At last, the design examples present the validity and practicability of this method on solving the problems of key target tracking parameter matching scheme.
A Design of Cascaded Multilevel Inverter Snubber Circuit
Authors: Zhou Qing Hong , Liu Qing Feng
Published: November 2012

The high frequency induction heating power supply has received increasing attention from researchers, multilevel converter is a high voltage large power application areas of research focus and core, it solves the problem of the multilevel inverter output voltage waveform adjustment, avoids the problem of two times reversing that the load voltage in the commutation during the dead period occurred. An effective way to improve efficiency is to keep the power device of low voltage stress and less switching loss. A passive lossless snubber circuit is designed for inhibiting the reverse recovery current of diode and improving the turn-on condition of powers switch. The operation process of snubber circuit is analyzed and the parameter design method is given. The results of simulation have verified the validity of design methods and the conclusions given by theoretically analyzing in this paper.
Research on Feature Selection Based on Improved Particle Swarm Optimization
Authors: Wang Guo Qing , Jia Jun Bo , Li Xu Yuan
Published: November 2012

Feature selection is one of key technologies for fault diagnosis. Especially for high dimensional data, Feature selection can not only find the feature subset with sufficient information, but also improve the classification accuracy and efficiency. In order to decrease the number of diagnosis parameter in fault diagnosis of Liquid-propellant Rocket Engine, the paper proposes one feature selection method based on improved particle swarm optimization, the method applies the quantum evolution thoughts to PSO. The particle is restricted in the range from -π/2 to 0, so the particle can correspond to the quantum angle. The parameter optimization function is designed. The improved algorithm can decrease the number of parameter in fault diagnosis of Liquid-propellant Rocket Engine from 25 to 6.
Three-Dimensional Elastic Solution of a Transversely Isotropic Functionally Graded Rectangular Plate
Authors: Nie Guo Jun , Feng Zhao Yang , Shi Jun Tao , Lu Ying Ya , Zhong Zheng
Published: November 2012

Three-dimensional elastic solution of a simply supported, transversely isotropic functionally graded rectangular plate is presented in this paper. Suppose that all elastic coefficients of the material have the same power-law dependence on the thickness coordinate. By introducing two new displacement functions, three equations of equilibrium in terms of displacements are reduced to two uncoupled partial differential equations. Exact solution for a second-order partial differential equation expressed by one of displacement functions is obtained and analytical solution for another fourth-order partial differential equation expressed by another displacement function is found by employing the Frobenius method. The validity of the present solution is first investigated. And the effect of the gradation of material properties on the mechanical behavior of the plate is studied through numerical examples.
A Design of the Automatic Spray System of Belt Conveyor’s Loading Point
Authors: Guo Yong Cun , Zhang Jian , Hu Kun
Published: November 2012

In this paper, against the belt conveyor point dust requirements, I design automatic dust removal system set apply loading point. working principle this system. At the same time carried out a detailed description automatic control section on the principle of superiority its work automatically. Finally, simulation software AMEsim its automatic control part the computer simulation obtained a more accurate experimental data. The simulation data show that the system be able to timely adjust the operating parameters system with change dust concentration has the effect of dust, special profiles to normal work. Improve working environment workers, improve the safety of operations, reducing moisture content coal, electricity and water savings, in line with the call the national energy saving, with good promotional value.
The NC System Design for Strengthening and Polishing Machine
Authors: Tao Jian Hua , Liu Hua , Liu Xiao Chu , Fei Xiao Jun
Published: November 2012

This paper is to design the NC system for the strengthening and polishing machine. First, it designs the overall scheme of the system on the basis of taking all of the factors into account, and focuses on the injection system include its structure and working principle. Then, it combines with the main control flows in the mode of zero-return, manual and automation, and takes HUST H6C series CNC of Taiwan YITU Co., to deeply research the NC system for strengthening and polishing machine.
Study on Matching Design of Motorized Wheel for Urban Electric Vehicle
Authors: Yang Wei Hua , Fang Zi Fan , He Kong De
Published: November 2012

In order to enhance the dynamic performance of urban electric vehicle, the matching design research for the motorized wheel is conducted. Firstly, the types and technical advantages of motorized wheel are recommended, then, the structure parameters and dynamic parameters of complete vehicle and motorized wheel are determined and calculated, and the brake is selected. Finally, the design opinion and the reference for the selecting suspension are given.
Design of Armored Vehicles Lead-Acid Battery State Monitoring System
Authors: Li Gang , Xie Yong Cheng , Li Guang Sheng , Wei Ning
Published: November 2012

In order to raise the maintenance efficiency of the armored vehicles Lead-Acid battery, this paper introduces an state monitoring system of Lead-Acid battery. The system used the ATMEGA8 as the control core. Through designing measuring circuit of the terminal voltage, internal resistance and temperature as well as building a human-computer interaction user interface using the C++builder, the system can fast and accurately monitors the state of battery. At the same time, we try to use the lock-in amplifying technology to measure the battery inner resistance. The experiment results show that the system easy to use and has a high accuracy.
Performance Study on Miniaturized Rapid Denture Repair System
Authors: Zhang Lin , Tu Fen Fen , Wang Jie
Published: November 2012

The paper presents a miniaturized two-spindle rapid denture repair system with applications on CAD/CAM dental restorations. The necessary functions possessed by denture processing system in medical treatment environment were defined, and the main technical parameters of the machining system were determined. The modal tests of the system structure were conducted for the key areas vibration mode. The volumetric geometric errors of the system were measured with laser interferometers. At last, the milling experiments of human molar crown denture were carried out with the mean surface roughness Ra value 0.8μm, which is consistent with the requirement of dental restoration.
Development of Zr-Ti-N Coatings for Micro Drills for Machining of PCBs
Authors: Yao Shun Hui , Su Yan Liang , Kao Wen Hsien
Published: November 2012

A group of Zr-Ti-N coatings was prepared and studied to access their potential as a protective layer for micro drills to obtain cutting tool wear improvement. The coatings were grown using an industrial-scale four-target closed-field unbalanced magnetron sputtering ion plating system, employing one Ti and three Zr targets working in residual N2 atmosphere. To achieve Zr-Ti-N coatings with varying Ti doping content, the current applied to the Ti target was subjected to change from 0A to 3.6A while those to the Zr targets were kept constant. The coatings were characterized using GDOES, XRD, SEM, Vickers microhardness tester, scratch tester and Rockwell C indentation tester. Evaluation of wear improvement by Zr-Ti-N coatings for microdrills was conducted by machining of FR4 print circuit boards. It was found that the coatings with 16.5 at.% Ti doping content showed the highest microhardness and wear improvement for microdrills. Wear of microdrills with this coating could be reduced by a factor of two as compared with traditional TiN coated ones.
Study on Electromagnetic Repulsion Suspension of CNC Machine Guide System
Authors: Zhang Xiu Yan , Zhao Yong Cheng
Published: November 2012

Magnetic suspension technology is used in CNC machine tool. The guide which uses the electromagnetic force is suspended in the air without mechanical touch. There is no mechanical contact with the supporting components. It can eliminate friction and wear. Magnetic suspension structure guide can achieve fast and precise position, and increase the productivity of the equipment substantially. Magnetic suspension structure guide has a lot of significant advantages. The magnetic suspension rail can ensure the high positioning accuracy of machine tools platform from the structure, and reduce the inertial mass of the drive system, Improve platform mobile frequency response. Magnetic suspension system has both the advantages of Energy-saving and environmental protection. The magnetic suspension support extends the useful life of equipment, improves the operating conditions of equipment. It has broad application prospects in terms of transportation, machinery, appliances, materials, metallurgy, electrical, Material.
Effect of Injection Parameters on Immersion Liquid during Wafer Scanning
Authors: Chen Hui , Liu Qi
Published: November 2012

Double patterning improves the development of immersion lithography, but it brings new challenges including the higher scanning velocity of wafer. In this paper, considering two typical injection types, the three-dimensional computational fluid dynamics model is developed to investigate the effect of injection parameters on immersion liquid during wafer scanning. By analyzing the velocity distribution of immersion flow and normal stress on the lens, the proper parameters of injection are proposed under the typical conditions, and the appropriate parameters which lead to effective renovation with low lens distortion are also given.
The Optimization of Tooth Form Fitting Error on Worm Type Shaving Cutter
Authors: Cai Shan Le , Cai Yan Wei , Huang Wen Tao
Published: November 2012

In order to solve the flank concave problem of the rotary gear shaving cutter, a new worm type shaving cutter has been manufactured, which will be used on a gear hobbing achieving freedom shaving. And its tooth precision can reach 6-7 level. The main contents includes the worm normal section curve equation of the worm type shaving cutter involutes, the optimization of tooth fitting error and the linear fitting of the tooth curve of the normal section by the MATLAB genetic algorithm toolbox. According to GB/T6084-2001 hob series standard, the results showed that the error theory is less than 1/6 of the AA level.
Fabrication of Taper Gap Warm End Heat Exchanger in Coaxial Pulse Tube Cryocooler
Authors: Yang Kai Xiang , Wu Yi Nong , Zhang An Kuo , Xiong Chao
Published: November 2012

Coaxial pulse tube cryocooler (PTC) acquires a perfect substitute for the existing Stirling cryocooler for providing reliable low-noise cooling for the given infrared detector system. The challenging work is the exacting requirement on its dimensions which have to adapt to the given Dewar.Warm end heat exchanger is the key assembly of the pulse tube cryocooler,and the coupling effect especially the heat exchange of the gas and solid in warm end heat exchanger directly affects the performance of the pulse tube cryocooler ,this paper briefly analyzes the differences of warm end heat exchangers in the form of cylinder gap,cylinder copper screen and taper gap.The status of every type of warm end heat exchanger are outlined, including the fabricating material and technique kernel , and especially introduce the taper gap warm end exchanger.In the end of the paper we conclude that the taper gap warm end exchanger can apparently improve the performance and minish the volume of the of the pulse tube cryocooler
The Progress of Bionic AUV Stealth Technology Research
Authors: Liu Yan Jun , Sun Xing Wang , Li Yu , Liu Ji Bin
Published: November 2012

With the development of high technology war. Bionic autonomous underwater vehicle has become a popular issue these years, To Achieve better concealment, the stealth technology is the most difficult problem that must be solved. This paper briefly introduces the principle methods to keep the AUV quiet and difficult to be found, the advantages and disadvantages of all these extraction methods were analyzed. The stealth technology of underwater vehicle refers to the means that make the enemy’s sonar can’t detect their own location or shorten the distance, mainly including two aspects: noise control and acoustic antagonism. Finally, the development tendency of Bionic AUV stealth technology is provided.
On the Feasibility of Green Packaging from the Use of Bamboo
Authors: Cai Ni Na
Published: November 2012

Nowadays, with the increasing prominent contradiction between waste of product packaging and environment, people gradually realize the importance of green packaging. Through accessing to bamboo packaging related to the analyzing summarizing and studying, the paper deduces the characteristics of green packaging which are green packaging material, reasonable packaging structure, combined with local and traditional culture. Based on studying on packaging of Shanxi Liangpi, the paper aims to find out ways and reasons about the feasibility of green packaging.
The Dual Implementation of Lean and ERP in Manufacturing
Authors: Li Yu Xian , Liu Mei Hong , Li Zi Liang
Published: November 2012

The ‘Push’ of ERP (Enterprise Resource Planning) seems to be contradictory with the ‘Pull’ of Lean manufacturing; actually they have mutual promotion in production. The dual implementation of ERP and Lean is inevitable direction in the enterprise’s development. This paper first explains the difference and interrelation between ERP and Lean Manufacturing, and discusses the mutual promoted effects. Then focus on “how to accomplish the dual implementation” To answer this question, this paper mainly put forward three points: firstly strength the centralized management of all kinds of data and information in manufacture; then fuse ERP with Kanban; lastly build business process mixed by Pull-based mode and Plan-controlled mode. Through the above methods, ERP links with Lean to boost each other. Thus enable enterprise to gain a competitive advantage in manufacturing.
The Method Used for Process Precision Prediction of Micro-Assembly Based on Principle of Maximum Entropy
Authors: Zhang Xiao Feng , Zhang Zhi Jing , Sun Yuan , Ye Xin , Ye Zhi Peng
Published: November 2012

This paper briefly introduces the principle of sub-micro precision micro-assembly system based on the micro force detection. The linear mapping of micro force-micro displacement can be obtained, which is in agreement with the experimental data. And the probability distribution density function of the fitted mapping coefficients can be derived by the principle of maximum entropy. Furthermore, the uncertainly of k is accessed. Hence, the reliability of micro force-micro displacement mapping in the assembly process is demonstrated. The experiment result shows that the assembly precision can be accurately predicted by the fitted micro force-micro displacement mapping.
Research on Feedrate Planning Model for Continuous Small Lines Contour with Look-Ahead
Authors: Jiao Qing Song , Wang Shi Yong
Published: November 2012

The traditional line or arc interpolation function treats small line segments separately and conducts feedrate planning within each of them. The rather small lengths of the segments result in low machining efficiency, and the frequent acceleration and deceleration also reduce the lifetime of the motor. To solve these problems, a look-ahead feedrate planning model for the continuous small lines contour (CSLC) is proposed in this paper to implement the high speed interpolating. The feedrate planning is elaborated from the aspects of the curvature characteristic of the contour, the turning feedrate, and the federate optimization between the adjacent segments. Simulations show that the proposed algorithm can efficiently improve the machining efficiency.
Research and Improvement of Leakage Protection System in Coal Winning Machine
Authors: Chen Xia , Xi Xin Bo , Chu Peng , Pei Yong Chun , Wang De Lan
Published: November 2012

Most of the Shearer adopt additional DC power protection, it has to protect a comprehensive, capacitive current compensation, the simple characteristics of action value of the tuning, however, it in the actual production will occur leakage protection device malfunction, tripping phenomenon For the leakage protection circuit in traction motor of coal winning machine is impacted by frequency converter devices in the course of their work, malfunctions appear frequently. This paper makes an in-depth analysis, analyzing the shortcomings of the current protection circuit, After the analysis of the interference signal, it is proposes a solution of using the subtraction circuit to offset interference signals and conducts a simulation analysis. The above scheme, which is simple and easily realized, can improve the reliability of leakage protection device in traction motor. Avoiding unnecessary production halts. The production efficiency can be improved.
Improvement of Hydraulic System of New Energy Saving Die Casting Machine
Authors: Zhu Xu Xia , Zhao Wei Min , Xu Jia Feng
Published: November 2012

Due to the growing tension of non-renewable energy supply, in order to enhance sustainable development and competitiveness of the die-casting equipment, developing new energy-saving die casting machine is imperative. In this paper the hydraulic system of die casting machine was studied, mainly about how to adjust and improve its oil supply and oil return system, servo technology and pneumatics were applied, the result shows that the new methods can effectively reduce the overall energy consumption, and improve the efficiency of the system.
The Research Progress of Automatic Drilling Technology
Authors: Lin Wei , Yu Ping , Zhang Chun Peng , Zhang Peng
Published: November 2012

This paper summarizes the current research condition of automatic drilling technology at home and abroad, it analyses the current type of automatic drilling combined with concrete examples. By comparing the working principles and structure characteristics of the automatic drilling, it points out the shortcomings of the existing technology and the development trend of the automatic drilling in our country. It is considered that AC frequency conversion motor technology and full hydraulic automatic drilling technique should be emphatically promoted, so many due improvements should be made on automatic drilling in China. Finally it makes a conclusion that the intelligent drilling must be achieved and automatic drilling system as the indispensable important part of intelligent drilling will have more broad application prospect in intelligent drilling.
Iso-Scallop Toolpath Generation for Orthogonal Turn-Milling of Ruled Surfaces
Authors: Wang Wei , Peng Fang Yu , Yan Rong , Duan Xian Yin
Published: November 2012

This paper presents a new method of computing constant scallop height tool paths for orthogonal turn-milling of ruled surfaces. Indeed, the traditional tool path generation method in orthogonal turn-milling leads to unevenly distributed scallop-height between adjacent toolpaths, which prevent from reaching the required quality. The proposed approach is adequate for orthogonal mill-turning whose toolpath topology is parallel-pattern or spiral-pattern and the constant scallop height is guaranteed by modifying the path-interval distance through adjustment of the offset distance.The machining results obtained show that this method can reduce uneven distribution of scallop height.
The Green Design of Bracket of Scraper Part of Coal Mine Underground Horizontal Extension Transfer Machine
Authors: Mao Ping Huai , Ding Li , Li Jing Xi
Published: November 2012

Recently, transporting coal in the coal mine is poor efficiency and too costly. Coal mine underground horizontal extension transfer machine is used to transport coal faster and better. To resolve the problem how to connect the scraper conveyer with tramcar in this system, the design of the bracket has been brought up. The bracket of scraper part is the main bearing of coal mine underground horizontal extension transfer machine, and all the scraper conveyer must be fixed in the bracket. In addition, the design of the bracket of scraper part not only considers the rationality in the structure, but also considers the effect of the environment. The system works in extreme circumstances, but the green design can resolve it. It can effectively combine the choice of material, the structure of the bracket, the methods of technology with exterior styling, reflecting the human, machine of harmony with the working environment.
Coaxial Adjusting Method for Irregular Rotating Workpiece
Authors: Li Qian , Ma Li Qun , Wang Zhong Yu , Sun An Bin
Published: November 2012

At present, most coaxial adjustment methods were evolved from traditional dial indicator coaxial adjustment method. The outer of the contour used as a benchmark to measure the axial and radial ruinous in these methods. However, these methods contain cylinder error of the shaft itself. To solve this problem, a method of using the double-layer one-dimensional Position Sensitive Detector (PSD) and laser was proposed. The laser should be fixed to the outside of the irregular rotating device, ensuring the two parts synchronous rotate ; the 6 one-dimensional PSD was divided to high and low 2 layers which were placed in coaxial position with the reference axis. The laser coaxial sweep passing the PSD, when laser coaxial and the irregular device rotate synchronous, the light of spot position on the PSD can determine the irregular rotating workpiece’s axes and the reference axis position relationship, the device can be used to adjust coaxial in this way.
The Experiments Study of Polishing Characteristics during Polishing Process
Authors: Tsai Hung Jung , Tsai Hung Cheng , Huang Pay Yau , Horng Jeng Haur , Chiu Shun Jung
Published: November 2012

The investigation of experiment becomes more important to increase the understanding of polishing performance. In this paper, a high precision polishing process test bench with in-situ measurement technology was applied to investigate the effects of operating parameters on polishing interfacial phenomena during mechanical polishing with IC1000 pad. The shear force and temperature rise were measured for stainless steel during mechanical polishing process. The surface temperature was measured by T-type thermocouples and the shear force was measured by a load transducer. The shear force for various particle size, applied load and rotation speeds during polishing process was demonstrated. Furthermore, the temperature rise under different slurry concentration was investigated. The experimental results contribute to the understanding of polishing mechanism and also provide an index to end-point-detection.
Coal Mine Underground Horizontal Extension Transfer Machine
Authors: Mao Ping Huai , Zhai Bing , Ding Li
Published: November 2012

At present, many coal mines in underground coal loading method are: first we will fill with the first tramcar, and then push the tramcar to another one. Finally, the electric locomotive will take all tramcar away. This method has brought many problems: the demand of roadway widened, the transmission efficiency is low, the transmission of high cost, labor intensive. To resolve these problems, we put forward a kind of application in underground coal mine machinery--horizontal extension transfer machine. This article describes the loader part of the structure and working principle. Green design principles, to provide a theoretical basis for the design of similar machinery. There are many advantages of the structure in the machine, such as compact, simple operation, easy maintenance, low costly and environmental.
Study on Wafer Thinning Characteristics of Ultimate Diamond Disk
Authors: Jin Xu Xing
Published: November 2012

Silicon wafer is machined by diamond cutting tools to certain extent, the cutting tool currently used is polycrystalline diamond (PCD). However, as its cutting edges are not leveled to the same height, it will produce different depth of cut and the stress distribution is uneven on wafer surfaces, in the process of wafer thinning, both the workpiece and the cutting tool are probably damaged, this will increase the production cost accordingly. In this paper, a strategy is described to improve the ability of cutting tool for wafer thinning, a cutting tool named Ultimate Diamond Disk (UDD) designed by Taiwan Wheel Company is recommended, which can reduce both the crack of workpiece and the wear speed of cutting tool. Moreover, an experiment on base of different machining parameters including rotation speed of spindle, feed rate and depth of cut was tested and discussed. As a result, the removal mode of workpiece material and the wafer thinning characteristics of UDD are obtained.
The Design and Analysis of the Column of the Small Dual Fork Stacking Robot
Authors: Wen Huai Xing , Zhao Qing Fu
Published: November 2012

The stacking robot is the main equipment in the automated high-rise warehouse.It plays an important role in the automated high-rise warehouse. Column is a major component of the stacking robot. Its performance has a direct impact on the overall performance of the stacking robot. In this paper, combining with the actual work situation of the stacking robot, we use finite element software Ansys Workbench to analyze the column of the small dual fork stacking robot in structural mechanics.Based on the analysis,we can find its weakness and improve.It provide a theoretical basis for the actual manufacturing of small dual fork stacking robot. At the same time, it also provides an effective design and analysis methods for the manufacture of the other parts of the small dual fork stacking robot.
Parameters Optimization and Experimental Analysis in High Speed Machining
Authors: Lin Huan , Gao Dong Qiang , Li Zhong Yan , Yi Jiang Miao
Published: November 2012

First of all, in the cutting parameters optimization, according to the different processing conditions, optimization variables selection is different, including production efficiency the objective function and the constraint conditions of the machine tool. And then using genetic algorithm to build a high-speed processing parameters optimization model. The mathematical model explores the best solution through the software Matlab, and gets the optimal combination between the parameters of each cutting; high speed machining cutting parameters provides the reference for the choice of the user. Through the optimization of the comparison of the before and after that, using genetic algorithm cutting parameters optimization, mach inability got obvious improvement, in order to ensure the quality of processing also achieve the maximization of the production efficiency.
Application Research on TorkBuster in Well Yashen 1 of Yumen Oilfield
Authors: Zeng Yi Gen , Wei Zhong Liang , Liu Da Hong
Published: November 2012

To the technical difficulties of slow ROP and low drilling efficiency in Silurian formation of Yumen Oilfield. After investigating on the ROP improvement technologies of domestic and abroad similar formation's characteristics, proposing a drilling test program of torsion and percussion in Silurian formation of Well Yashen 1. The test well section is 3753.00~4108.05m, the accumulative footage of TorkBuster is 355.05m, the actually drilling time is 208.35h, the average ROP is 1.70m/h. Compared with the offset well, the average ROP is up to 110%.The test results are shown that: TorkBuster eliminates the "stick-slip" phenomenon effectively when the bit cutting the formation, ensures the PDC bit continue to cut the formation effectively, cuts down the drilling cycle and saves the drilling cost. It provides a new guiding ideology to increase ROP in Cretaceous formation of Yumen Oilfield.
Research and Application of 9-5/8〞Retrievable Casing Drilling Technology
Authors: Pei Xue Liang , Xu Jun Liang , Zhu Jie Ran
Published: November 2012

Combined with present situation of ShengLi oilfield drilling equipments and its matching tools, Drilling Technology Research Institute of ShengLi has carried out research on retrievable casing drilling technology, and made emphasis on the research of the retrievable BHA. Running/Retrieving tool of BHA, Locking device of BHA and Composite bits have been designed and completed. And the laboratory experiments of these key tools have been finished. The field experiments have been finished in He4-GX60 well and Xin110-X16 well. The trial result has proven that the retrievable casing drilling device is simple in structure, the design is rational and it can meet the demand of field application. The construction technique of casing drilling is completely feasible, technical route is right, which satisfied with the field operation requirements
Optimization Method of Man-Machine Operating for Multi-Variety and Small Batch Production
Authors: Chen Wei Zeng
Published: November 2012

According to the characteristics of the multi-variety and small batch production units, the traditional man-machine operating analysis methods can not meet the needs of the optimized manufacturing process. In order to maximize the utilization of man-machine resource, a man-machine combination and mixed flow processing method is proposed in this paper. It involved several integrated application methods. The man-machine operating analysis method can optimized the process of the man-machine operating, and also can acquired the important parameters of the man-machine operating in each species production processing, The integration of gather form, histogram and single people-multi-machine calculation formula made the various products processing parameters analysis and the remaining energy utilization easily. By using this method, the optimized plan of the man-machine combined in various products processing can be determined. The characteristics of the proposed method are that it extends the design program of man-machine combination and mixed flow processing. The test results show that the new method works well in the multi-variety and small batch production model.