bluuebunny/crossref_metadata_2025 huggingface dataset:
Effect of Alloy Composition on the Microstructure and Mechanical Properties of Al-Fe-V-Si Heat-Resistant Aluminum Alloy
Authors: Tang Jin Jun , Fei Liang Jun , Gong Zhao Hui , Zhu Xiu Rong , Shi Hong Xia
Published: October 2013

Heat-resistant aluminum alloy because of its low density, low price, good heat resistance and corrosion resistance, has been widely used in aviation, aerospace, weapons and other industrial fields. In this paper, preparation of Al-Fe-V-Si heat-resistant aluminum alloy materials is used in the RS/PM process, and studied the influence law of effect of alloy composition on the microstructure and mechanical properties of heat-resistant aluminum alloy. The results show that, Fe, V, Si element content and Fe/V ratio has great effect on the microstructure and mechanical properties. When the Fe content is too low, the content of Al12(Fe, V)3Si phase is less. Mechanics to improve material properties cannot be maximum; if the content of Fe is excessive, the strength of the material do not increase, but decrease the plastic. The addition of V element can be stabilized in Al12(Fe, V)3Si Si phase; and the addition of Si can inhibit the second-phase dispersion phase coarsening and decomposition, increase the high temperature stability of materials; Fe/V ratio affects the coarsening rate of second-phase particles, thus affecting the thermal stability of materials.
Simulation on the Temperature Field of Bobbin Tool Friction Stir Welding of AA 2014 Aluminium Alloy
Authors: Liu Xue Mei , Yao Jun Shan , Cai Yue , Meng Hui , Zou Zeng Da
Published: October 2013

Bobbin tool friction stir welding is a new type of friction stir welding. In the study, the thermo-mechanical model of the bobbin tool friction stir welding was set up. By this model, the temperature field of AA 2014 aluminium alloy work plate of 6mm was simulated, which provides useful information for the investigation of this new process. Simulation results show that the temperature field of the cross section presents symmetry approximately about the mid thickness of the work plate. The high temperature zone has large radius at bottom and top surfaces near the shoulders while small radius at the mid thickness, like a waist. The max temperature for the point at retreating side is about 40°C higher than advancing side.
Assessment of the Cutting Tooling Effect on Turning Chatter
Authors: Hwang Joon , Jeong Ey Hyoun , Chung Eui Sik , Liang Steven Y.
Published: October 2013

Machining performance is often limited by chatter vibration at the tool-workpiece interface. Chatter is a type of machining self-excited vibration which originates from the variation in cutting forces and the flexibility of the machine tool structure. Machining chatter is an inherently nonlinear phenomenon that is affected by many parameters such as cutting conditions, tool geometry, cutting speed, feed rate, depth of cut, overhang length of tool, clamping condition of workpiece. This study presents experimental approach for investigation of effects of various cutting tool geometry on the onset of chatter. In turning process, measured cutting force signal and triaxial accelerometer signal was used to know the characteristics of chatter vibration. The static and dynamic component of cutting forces reflect onset of chatter vibration. Proper selection of tooling is an important parameter in terms of chatter elimination in machining.
Simulation Analysis of Battery Thermal Management System Using Phase Change Material (PCM)
Authors: Li Mao De , Liang Peng
Published: October 2013

This article mainly addresses the technology of improving heat dissipation performance of power battery packs using Phase Change Material (PCM). This new technology aims to reduce the temperature gradient among the battery packs. As the thermal properties of the pure paraffin wax are hard to meet the dissipation demand, changes are made to add graphite particles into it. Commercial CFD software ANSYS FLUENT is used to simulate the heat dissipation process during battery discharge using PCM and traditional forced air cooling methods. The simulation results show that both under constant current and pulse current the maximal temperature and temperature gradient by the end of discharging using PCM method are relatively lower than that of using forced air cooling method.
Development of Underwater Acoustic Transducer Using 1-3-2 Piezoelectric Composite
Authors: Li Li , Wang Li Kun , Qin Lei
Published: October 2013

The flat transducer is composed of 1-3-2 piezoelectric composite and copper shell. The structure of transducer was determined according to design requirement and finite element analysis by ANSYS. The transducer was prepared by using a 25mm×25mm×4.8mm 1-3-2 composite chip, rigid foam backing, copper shell, polyurethane layer and acoaxial cable. The voltage response, source level, receiving voltage sensitivity and other performance were measured. The resonant frequency of transducer is 294kHz, the maximum transmitting voltage response is 159.6dB, 3dB bandwidth is 32kHz, source level is 208dB, receiving voltage sensitivity of the transducer is -203 ± 3dB in the frequency range of 50-250kHz frequency, the beam width of -3dB is 11º in the directivity.
Application of Gray Level Co-Occurrence Matrix Method in Characterization of Cylindrical Grinding Surface Roughness
Authors: Chen Zi Xin , Xu Feng Yu
Published: October 2013

Machine vision based surface roughness inspection method is applied to assess different cylindrical grinding surfaces under LED illumination. Images directly recorded by a camera are analyzed by gray level co-occurrence matrix (GLCM) method to discover its texture information. It shows obviously relationship between feature values of the matrix and their corresponding surface roughness values. Uniform table are also designed to choose optimal parameters, which is five of distance between pixel pairs and ninety degree of angle to calculate GLCM. Entropy is chosen to represent different surface roughness images by comparison of correlation coefficients between the parameters and the corresponding surface roughness values.
A Simulation Method of Pressure-Stress Affects Power Press Pack FRD Chip Forward Voltage
Authors: Zhao Ge , Zhang Yu , Liu Yue Yang , Che Jia Jie , Gao Wen Yu , Jin Rui , Yu Kun Shan
Published: October 2013

Press Pack IGBTs modules have the characteristics of easy series connection and double side cooling widely used in industry, electric power, smart grid and other fields. Press Pack FRD (Fast Recovery Diode) chips is a component of Press Pack IGBTs module. In the actual operating conditions, the electrical parameters of FRD device will change in the electrical properties under pressure-stress, especially the Forward Voltage (VF) parameters. This change of the VF parameters will have adverse effect on the reliability of FRD chip and the overall module. In this paper, according to the stress of physical model of semiconductor material silicon were analyzed, proposed method to stress effect on the VF parameter of the FRD simulation analysis software.
Electrical Properties of PSZT Doped with Mn and Ce Elements
Authors: Wang Xuejie , Tian Hui , Huang Fei , Luo Min , Zheng De Yi
Published: October 2013

Piezoelectric materials can convert between electric and stress and has been applied widely in industrial field. Lead strontium zirconate titanate (PSZT) ceramic, as one kind of piezoelectric material, shows good piezoelectric properties and has been used in making resonators, sensors etc. For further improving its piezoelectric properties, various elements have been doped into PSZT. In this paper, two kinds of oxides, MnO2 and CeO2, are doped into PSZT. The electrical properties of the doped PSZT samples are tested and the microstructures of samples are observed as well. Results show that, after doping 0.1wt% MnO2 and 0.1wt% CeO2, the electrical properties are enhanced to: d33=569pC/N, tgδ=0.94%, kp=0.632, ε=2882. It can also be found from SEM results that, as increasing the doping amount of MnO2, the grain size of samples increases, and by doping CeO2, results show reverse effect.
Shape Memory Alloy Driven Two-Way Deformation Structure Design
Authors: Yu Dong , Chen Zhao Bo , Zhang Bo Ming , Jiao Ying Hou , Jin Long Xue
Published: October 2013

Shape memory alloy (SMA) is a type of smart material with huge driving force, and large driven displacement. Using SMA as the structure driver may force a bi-directional deformation structure that can achieve high efficiency and compact driving structure. SMA, together with elastic component, forms the two-way driving structure; however the two, if respectively serving as the driver, can enable the occurrence of the simplest bi-directional drivable structure. The offset structure constituted by SMA, not only can achieve two-way drive, and does not require continuous input of energy during the shape-stabilizing period. This paper studies the design methods of these two structures, gives the typical formulas, which makes possible efficient and compact bi-directional drivable structures.
The Technical Viability of the Reuse of Recycled Concrete Aggregate (RCA) for the Production of Interlocking Concrete Paving
Authors: Serpa M.C. , Evangelista Ana Catarina J. , Miguez Marcelo G. , Filho Romildo D. Toledo , Barroso Daniel
Published: October 2013

A report about the current industry standards of technological, economic and legal development for the recycling and reuse of civil construction waste (CCW). The use of CCW, such as recycled aggregate inserted into concrete, is still in its initial stages in Brazil [. This paper's main objective was to evaluate the quality of concrete produced using different amounts, or fractions, of recycled concrete aggregate RCA from the residues of demolition wastes RDW from UFRJ's university hospital, located at its Rio de Janeiro campus. These residues had the dimensions of crushed gravel, and were inserted into a mix of conventional concrete for making interlocking concrete paving, based on the characterization of the recycled aggregates and mechanical tests, carried out on laboratory produced cylindrical specimens of concrete, contributing to the increase in the recycling of cement and concrete in Brazil.
The Thermal Design of Surface Type Heat Exchanger
Authors: Wang Ya Rong , Wang Pei Rong
Published: October 2013

Heat exchanger, which is to transfer the heat from the fluid with high temperature to the equipment with relatively low temperature.There are at least two kinds of fluid participate the process of transferring heat, the fluid with high temperature is called hot-fluid,release heat, and the one with low temperature is called cold-fluid absorb heat. Heat exchanger is a very necessary and important part in many areas and its investment always compose 30~40 percent of the whole investment. Moreover according to the policy of the government Energy development and conservation,the energy saving in the first place, the use of heat exchanger has a very close relationship with the development of energy and save of energy. In this paper we describe the thermal design of surface type heat exchanger with practical example.
The CFD Analysis of Gasoline Engine Turbocharger Compressor Based on NUMECA
Authors: Liu Xiang Ling , Liu Meng Xiang , Gong Jin Ke
Published: October 2013

In this paper, the finite element model and mesh model of JQ40A gasoline engine turbocharger compressor was built by using Computational Fluid Dynamics(CFD) software NUMECA. The compression ratio and efficiency characteristics of compressor were simulated and verified experimentally. Based on the established models, the airflow velocity field, pressure field, temperature field and entropy field in the compressor volute passage and impeller clearance were simulated and analyzed. The simulation results show that the pressure loss is low and the flow passage design is reasonable; A rational volute export curvature R does not affect the compressor efficiency; the compressor impeller rim size can be adjusted to accommodate the engine torque characteristics; the engine speed affects internal loss of the flow field; within a certain range the impeller tip clearance is smaller, the higher the efficiency of the compressor is. The research methods and conclusions provide a basis for the optimization design of the compressor.
Control of Position and Pose on Virtual Axis Polishing Process
Authors: Zhao Chang Long
Published: October 2013

To guarantee the effect of virtual axis machine tool, improve processing quality, research on analyze machining parameter optimization problem on affect the machining accuracy of the virtual axis machine tool, position and pose of the virtual axis machine tool are analyzed, and find out the key factors that affect the position and pose, and progress the actual processing experiment of position and pose for the optimized processing parameters, the results of actual processing proves that the optimized processing parameters can guarantee good processing effect.
A New Flexible Track Automatic Drilling System
Authors: Bi Yun Bo , Jiang Yi Hang , Li Yong Chao , Wang Wei , Gao Mian , Li Shuo
Published: October 2013

The Flexible track automatic drilling equipment is widely used in aircraft assembly because of the low cost, high efficiency and high quality of holes. This paper constructs a new flexible track drilling system for large-size aircraft assembly. The system structure is introduced, and the transformation algorithm between product/device coordinate system and axes position parameters is proposed. The experimental results show that the transformation algorithm has the merits of high computational efficiency and high stability, and can meet the requirement of precision drilling.
The Research on 200 Liters Large Material Barrels with Double L-Rings Drop Analysis
Authors: Zhang De Qiang , Li Jin Hua , Li Yu
Published: October 2013

Using CAD / CAE / CAM softwaresolidworks obtain material barrels three-dimensional model. The analysis date of dropping simulation, the material barrel filled with heavy objects, free-fall from the height of 1.2 meter on non-normal condition, is got by the function of dropping test and the method of equivalent load setting. The result of analysis is very close to the results of the theoretical calculations. It shows that the design to improve product quality and efficiency has a very important theoretical and practical value.
The Optimization Analysis of the Conditions for Optimal Parameter Combination of Husker Capacity by Response Surface Method
Authors: Wu Yi , Wu Wei Wei , Ruan Jing Lan
Published: October 2013

In rice processing courses, the parameters configuration of rubber roll husker has significant influences to husker capacity. For this reason, this paper chose contact pressure between rolls, inlet flow, fast roll linear speed and linear speed difference as parameters, set up a regression mathematic model with Box-Behnken experiment design method which reflected the changing rules between husker capacity and the four parameters, and then optimized and analyzed the objective function. The conclusion indicated that consider only to raise the husker capasity, the main influential factors are the inlet flow, contact pressure, linear speed difference and fast roll linear speed; the optimal working parameter combination is: contact pressure 6.2kg.cm-1, inlet flow 174kg.cm-1.h-1, fast roll linear speed 17m.s-1 , linear speed difference 3.1m.s-1.
Goal-Driven Optimization Design of Lathe Bed Based on the Response Surface Method
Authors: Cong Ming , Wang Hong Chuan , Li Shan Shan , Wang De Sheng
Published: October 2013

In this article, the Lathe Bed of DL20-MST CNC machine tool is taken as the research object. The response surface method and optimization design of goal-driven are introduced. Combining the two methods, the size optimization design method of the Lathe Bed of NC machine tool is put forward based on the ANSYS. The design dimensions which play an important role in the static and dynamic performance of Bed are found through sensitivity analysis. And then, the goal-driven optimization design of the Lathe Bed is carried out based on the response surface method, searching for the optimal dimensions of Lathe Bed, realizing the lightweight design of the Lathe Bed of NC machine tool. In addition, the improvement on the performance of Lathe Bed after optimization is analyzed. The ideas and methods used in this paper offer a good reference for the design and production of the key parts of other similar machine tools, and have a great engineering application value.
TE0 Mode Resonant Properties of the Rubidium Clock Microwave Cavity Loaded with Ceramic Material
Authors: Li Xiao Xiao , Lei Jin Li , Ren Guo Dong
Published: October 2013

Resonant properties of a Microwave cavity with ceramic material for a new type of rubidium clock is studied by mode matching method. In order to study main factors influencing resonant characteristics, resonant frequencies of TE011 mode are calculated. In addition, the effect of the ceramic material on resonant frequency are also analyzed. This work is of great significance for cavity design and theory perfection in atomic clock.
A Survey of Underwater Wet Weld Seam Tracking Based on Ultrasonic Sensor
Authors: Chen Bo , Feng Ji Cai
Published: October 2013

With the exploration of marine sources becoming more and more important, underwater welding is widely needed. Because of the special working condition, underwater weld seam tracking technology is urgently needed, for the automation control of the underwater welding process is the inevitable development trend because of the rigorous environment. This paper used ultrasonic sensor to monitor the weld seam position in underwater wet welding process, and signal process algorithm was developed to obtain the weld seam information, experiment results showed that this method could detect the weld seam shape correctly, this load the foundation for further automatically controlling the welding process.
Finite Element Modeling and Analysis for a Certain Urban Bus Frame
Authors: Li Ya Hui , Luo Wei Dong , Zhou Rui
Published: October 2013

Using CATIA set up a 3d model of urban bus frame in this paper, And ANSYS13.0 is used to establish the body frame finite element model of the certain urban bus body frame, Based on this model, the static characteristics under various conditions were analyzed, and the features of stress and strain distribution are gotten. Through the analysis of calculation results, we can conclude that this body frame around the column to the rear windscreen beam junction strength in insufficient, need to increase cross-sectional area of the left column; The floor behind driver seats strength is not enough, need to add two beams to strengthen the support. And the calculation result shows that the rest of the frame has a certain extent optimization space, and can provide the basis for the next step of lightweight.
Study on Design of Color Guide System on Campus
Authors: Xiao Wei
Published: October 2013

The campus space as urban space environment, the need to provide spatial derivative knowledge systems, both for university users solve path finding problems, but also into the cultural identity of universities, colleges and universities as a knowledge space to enhance the image quality. Thesis on the campus guide system design knowledge content, establish a reasonable functionality embodied strictly systematic, consistent own campus culture construction, coordinating campus environment of the campus space guide knowledge systems.
Design of Conditioning Circuit of Mining Vibration Acceleration Sensor
Authors: Ji Xiao Dong , Yang Zi Xian , Zhao Xin Ying , Xue Guang Hui , Wu Miao
Published: October 2013

In order to adapt to the harsh conditions of the coal mine, according to the MA Verified standards, we developed a set of vibration acceleration sensor signal conditioning circuit of mining, used for picking up vibration signal in the coal mine. The conditioning circuit solve the vibration signal of large equipment acquisition problems in coal mine, and lay a good foundation for the research of coal mine equipment vibration signal.
Heating Mode of Type I Ammonia-Water Absorption Heat Pump with Parabolic through Collector
Authors: Wang Zhao , Zhao Bing Feng , Li Zhen
Published: October 2013

Presents the application of the system to a project in Dezhou. Tests the application effect and the COP of absorption heat pump units and the heat pump system. Analyses and evaluates the energy saving property of the system based on the test data, providing reference for other similar application.
Study on New Laboratory Scale Transverse Plate Electrostatic Precipitator Collecting Fly Ash
Authors: Yi Cheng Wu , Yin Tian , Huang Hai Qin , Du Yan Sheng , Yi Rong Jie
Published: October 2013

s. Experiments were carried out to investigate the treatment efficiency of soot particles with a new type laboratory-scale transverse plate electrostatic precipitator (ESP). It has a ω type collecting plates which are set perpendicular to the airflow and the discharged electrodes lie alongside the collecting plates. With this structure, the drift velocity has been improved while the size of ESP has been significantly minimized. Several most important factors influenced precipitator efficiency were discussed. According to the experimental results, the collection efficiency of the transverse plate ESP is above 90%. Different influential factors have different effects on each grade of particles. ω type collecting plates make them function like a dust collector cyclone without applied voltage. It also has a collection efficiency of 47.38%.
Research and Development of Household Fire Refuge Cabin
Authors: Yan Huai Chao , Li Lin Jie , Huang Jun Ge
Published: October 2013

With the high-rise building fire accidents have increased every year, the appearance of home fire evacuation cabin has a very important significance.At first,We introduced the development status of domestic and international mine refuge Chamber and two mine refuge Chamber products which was used commonly,and analysed their merit and shortcoming,where we could get the inspiration;Then we focused on the present situation of the household refuge compartment and analysis of its shortcomings and the main problems need to be solved;Finally we put forward the design concept of the household fire refuge cabin .
Optimization Analysis of the Wedge Block Surface of NYD Contact Backstop
Authors: Wang Quan Wei , Wang Ming Hui , Li Dong , Wan Dian Mao , Meng Rong
Published: October 2013

By analyzing the relationship of the design parameters of NYD contact backstop, the cross-section curve of the wedge block has been discussed as Archimedes spiral, logarithm spiral and arc. Each curve is designed optimally using MATLAB optimization toolbox. The merits and drawbacks of each curve are discussed.
Investigating Current Status of Container Housing
Authors: Lim Gyu Jin , Jeong Joo Seob , Jung Tae Hwa , Kim Sang Chul
Published: October 2013

The fast moving construction made use of the advantages that can be installed utilizing a container house and container buildings are developed and used for various purposes. In this paper, the advantages and disadvantages in a container housing was analyzed through present status and technology. Then, the form, kind, and structure of container housing were examined, container housing can be activated in the future is to propose ways. Then, research team proposed to promote container housing supply with a short duration and cost, eco-friendly to make use of the advantages, the various modules and institutional development in various areas.
Strength Analysis for Frame of Pavement Accelerated Loading Experimental Facility
Authors: Jia Qian , Wang Hui Jun , Guo Xing Yu
Published: October 2013

Frame is an important bearing part of Pavement Accelerated Loading Experimental Facility. Static strength analysis of frame was made under four conditions by finite element analysis software ABAQUS. The four conditions are bending, twisting, emergency braking and urgent turning in full load. The frame strength and stiffness were analyzed and the stress distribution and displacement were got. According to the conclusion, the structure improvement suggestions are put forward such as increasing the beam thickness, adding cross beams between the side beams in the dangerous section. These suggestions can improve the design quality and enhance the facility safety.
Defensive Analysis of Bunker within Taiyuan Iron & Steel (Group) Co., Ltd
Authors: Yan Wen Tao
Published: October 2013

Numerous bunkers in Taiyuan formed the unique military building culture .Take the bunker located in Taiyuan Iron & Steel (Group ) Co, Ltd as an example ,analyzing its building form ,building function ,building sight-defensiveness , etc. to illustrate the defensiveness of this special military architecture.
Finite Element Analysis of Prestressed Steel Reinforced Concrete Beam
Authors: Wang Cheng Quan , Zhu Yue Feng , Shen Yong Gang
Published: October 2013

Non-linear finite element model of prestressed steel reinforced concrete(PSRC) beams were carried out by using software ABAQUS. The effects of the parameters of non-prestressed reinforcement ratio, prestressed reinforcement ratio, effective prestressed force and non-prestressed tendons yield strength on the ultimate strength and ductility of PSRC beam were investigated. It is found that increase of the tension reinforcement ratio has little impact on the ultimate deflection but can improve the ultimate capacity of PSRC beam. Increase of the prestressed steel ratio can significantly improve the cracking load, stiffness and ultimate capacity of PSRC beam. The effective prestressed force can improve the bearing capacity of PSRC beam.
A Novel Numerical Method for Ground-Coupled Heat Transfer Problems
Authors: Li Xiang Qian , Wang Wei Wei , Li Ming Hai , Zhen Mao Yu
Published: October 2013

A meshless element-free Galerkin method (EFGM) which is applicable to arbitrary shapes but requires only nodal data is applied to two-dimensional steady-state ground-coupled heat transfer problems. The soil layer around underground constructions is modeled as a homogeneous medium and as a layered soil with two layers. The calculation precision of EFGM is validated by comparing EFGM results with those obtained by finite element method (FEM). EFGM reduce considerably the preparation of the model. EFGM is very appropriate for the ground-coupled heat transfer problems.
Main Existing Problems and Respective Countermeasures of Ground-Source Heat Pump Technique Applications
Authors: Li Zhen , Wang Wei Wei
Published: October 2013

Based on the investigation results of 40 operation projects of ground-source heat pump air-conditioning systems in Shandong, analyses the problems of ground source heat pump existed in project application and puts forward respective technical and management countermeasures, providing reference for other similar applications.
Study on Non-Contact Optical Vibration Senor
Authors: Sun Ke Xue , Li Xian Jun , Li Man , Yan Qing Yun , Cheng Xie Feng , Zheng Hao
Published: October 2013

The vibration measurement is one of the new application in the optical sensor. This paper studies a new non-contact optical vibration sensor, and implements the Optical fiber vibration sensor based on FPGA. The totally available measurement range arrived over 300um, and the accuracy of 0.1 um can be obtained . This fiber optic vibration sensor has a low cost, good reliability, and high accuracy measurements.
Comparative Analysis of Two Methods for Conduction Transfer Functions of Building Constructions
Authors: Li Xiang Qian , Wang Wei Wei , Li Ming Hai , Zhen Mao Yu
Published: October 2013

Conduction transfer function (CTF) is widely used to calculate conduction heat transfer in building cooling/heating load and energy calculations. It can conveniently fit into any load and energy calculation techniques to perform conduction heat transfer calculations. There are two popular methods, direct root-finding (DRF) method and frequency-domain regression (FDR) method to calculate CTF coefficients. The limitation of methodology possibly results in imprecise or false CTF coefficients. This paper analyzes the errors of two methods to the material properties of a multilayer heavyweight building construction. The results show that the calculation error of DRF method becomes increasing as the wall characteristic parameter becomes increasing. The maximal error even reaches almost 100%. However, the calculation error of FDR method always remains within 1% no matter how the wall characteristic parameters are varied. Thus, FDR method is more robust and reliable than DRF method.
An FPTAS for Uniform Parallel-Machine Scheduling Problem with Deteriorating Jobs and Rejection
Authors: Luo Cheng Xin
Published: October 2013

This paper studies uniform parallel-machine scheduling problem with deteriorating jobs and rejection. The processing time of each job is a linear nondecreasing function of its starting time. A job can be rejected by paying a penalty cost. The objective is to minimize the sum of the total load of the accepted jobs on all machines and the total rejection penalties of the rejected jobs. We propose a fully polynomial-time approximation scheme (FPTAS) for this problem.
An Adaptive Assembly Scheduling Approach in Knowledgeable Manufacturing
Authors: Wang Hao Xiang , Yan Hong Sen
Published: October 2013

To address the uncertainty of production environment in aircraft engine assembly, an adaptive optimization scheduling algorithm is designed for an aircraft engine assembly line in knowledgeable manufacturing. A Q-learning adaptive scheduling model of aircraft engine assembly is built on the objective function of minimizing earliness penalty. Simulation experiments indicate that the proposed algorithm outperforms other scheduling rules much. Especially, better results are generally achieved with the increase in number of engines to show good adaptive performance.
Research of Parts Inventory Classification and Management Strategy in Manufacturing Enterprises
Authors: Xue Dong Juan , Gao Tian Yi , Mu Guang Yu , Pan Ying
Published: October 2013

The correct inventory strategy is important to control reasonable inventory within manufacturing enterprises. And a new material inventory strategy is proposed based on the classification scheme according to the prosperities. First the material inventory styles are classified. Then a decision tree model is defined based on inventory classification result. The value of the node is decided by Fuzzy Neural Network if multi-attribute decision is needed and material inventory strategy can be decided with the classification tree and inventory strategy table. In the end, the implementation of the model in a manufacturing enterprise resource plan system is presented.
Scheduling Jobs on Dedicated Parallel Machines
Authors: Shim Sang Oh , Choi Seong Woo
Published: October 2013

This paper considers scheduling problem on dedicated parallel machines where several types of machines are grouped into one process. The dedicated machine is that a job with a specific recipe should be processed on the dedicated machine even though the job can be produced on any other machine originally. In this process, a setup is required when different jobs are done consecutively. To minimize the completion time of the last job, a scheduling method is developed. Computational experiments are performed on a number of test problems and results show that the suggested algorithm give good solutions in a reasonable amount of computation time.
The Financial Risk Assessment of Manufacturing Firms under the Supply Chain Environment
Authors: Li Li Jun , Si Meng Tan
Published: October 2013

Supply chain brings about many kinds of risk, as well as the competitive and marginal advantage. The financial risk of supply chain combines both supply chain risk and financial risk and leads the new research direction of supply chain management. Through analyzing the characteristics of manufacturing firms and concluding characteristic of financial risk transformation, the financial risk of manufacturing firms is classified. After the industry-based financial risk valuation index system is built, the Multi-level Fuzzy Evaluation method is used to evaluate it.
Influencing Mechanism of Productivity Load Ratio to Enterprise Business Efficiency
Authors: Tu Jian Fei , Xie Wen Dong
Published: October 2013

Capacity and load balancing is an important prerequisite to ensure normal business. Based on the analysis of the multiple relationships between the capacity and load, and the impact mechanism of capacity load factor on the business benefits is discussed by the making use of resources benefits, opportunities benefits and risk benefits. It is concluded that a good state of load capacity ratio is very important to enterprises to improve business benefits. Finally an example of enterprise applications is provided.
The Measurement of Economic Growth Contribution Rate by Population Quality in China Base on Cobb-Douglas Model
Authors: Liu De Jun
Published: October 2013

The paper measures the economic growth contribution rate by population quality in China by dividing the data into 3 epochs and 3 areas. The paper applies two methods and two time intervals to measure the contribution rate. The results show that the economic growth contribution rate by population quality is nearly 10 percents but the contribution rate is decreasing; the contribution rate is the largest in the east and a bit smaller in the central and west, and the number is 13.27 percents, 6.84 percents and 8.40 percents, respectively.
Analyses on W&R and BIAS Expert System of Stock-Market Software
Authors: Huang Hai Ping , Wang Pin
Published: October 2013

According to extensive quantity of public and factual data, this essay does tests on BIAS and W&R expert system of stock-market trading software in simulation experiment method, and compares their strength and weakness in the respect of mathematical statistics theory and Management objects, winning rate, annual return rate and net profit rate. The tests show that BIAS expert system is 2.58 times as good as W&R expert system in the items of annual return rate and net profit rate, 0.26 times in the item of the total number of trading. As a whole, BIAS expert system is superior to W&R expert system.
Identify the Spatial Characteristics of Employment Density in Northeast China with Software GIS and Spatial Statistics
Authors: Zhang Xiao Huan , Shen Ti Yan , Wang Da Cheng , Xu Hong
Published: October 2013

The spatial distribution of employment is very important to the study of regional structure. We made an analysis on the spatial characteristics of employment density in Northeast China based on the regional density equation and spatial statistical methods with GIS and Geoda. The results showed that the employment centers concentrate along the coast, the local convergence trend becomes more and more obvious from the northern to the southern part, and the multi-center pattern of employment has been formed in the Northeast Region of China, which is like an inverted letter Y. From the year 2004 to 2008, the concentration of the employment density in the Northeast China continued to be strengthened. However, different local employment centers presented different patterns of growth. The results in this study can support the decision-making for local development, and the model and methods used in this paper may provide reference for relative studies.
Improve the Mechanisms Product Yield through Cycle Time Optimization
Authors: Xiong Fei , Yao Jin
Published: October 2013

In mechanisms manufacturing environment, factory management level is always trying to achieve higher product yield to ship more quality product to the customers. In this paper, we will show the yield improvement based on cycle time reduces. Yield organization has established excellent systems for driving defect reduction. Established a clear set of core principles that would help drive a new way of driving cycle time improvement. Discuss the key findings captured through yield benchmarking activities. There are three core principles outlined above and the associated changes made in manufacturing to embrace these principles.
Modular Production Network and the Development of Strategic Emerging Industries in China
Authors: Cao Hong Jian , Liu Dan , Zhang Hui , Zhang Ya Qin
Published: October 2013

Modularization is an effective way to manage a complex system. Modular production network has unique information features and operation mechanisms. Personal information encapsulation enhances the innovation activities of modular system while system information assimilation ensures the compatibility between modules. These do not only provide a variety of innovative options for the future, but also make self-evolution possible without concentration beforehand. Self-organization is a feature of modular production network. Strategic emerging industries in China need a new industrial organization which has quick response to the market. With modular production networks strong competitive advantages, strategic emerging industries in China can be further optimized and upgraded by making full use of it.
Research of Location Selection of Distribution Center for Service Based on Gravity Method
Authors: Liu Shu Jun , Wang Zhe , Miao Rui , Xu Jing , Huang Hao
Published: October 2013

For the multinational chemical company, a reasonable distribution center location decision needs to consider the chemical product characteristics, logistics costs, logistics response speed etc. Establishing a logistics distribution center in North China is significant for the company. Based on the analysis of logistics costs, this paper chose gravity method to obtain the optimal distribution center location, and did a comprehensive analysis of the actual situation and then come to a reasonable distribution center location.
Fuzzy Evaluation on College English Teachers' Comprehensive Quality
Authors: Rui Li
Published: October 2013

Teachers’ quality is to support quality education in the most positive, the most active, the most decisive factor, both with professional skills training also has English communication skills of highly qualified personnel, require highly qualified English teachers. For college English teachers’ quality is difficult to evaluate the current situation, this paper, fuzzy comprehensive evaluation method is used. First, by combining research and comprehensive analysis of the results of previous studies, establish evaluation index system; Secondly, study the basis work before evaluated, including establishing factor set, weight set and evaluation set; Then, create mathematical model, including single-factor model evaluation and fuzzy comprehensive evaluation; Finally, a college English teacher for five quality comprehensive evaluation. Fuzzy comprehensive evaluation of this paper, designed to evaluate English teachers’ quality to provide a scientific approach is bound to raise the level of English teachers, deepen education reform has played a positive role in promoting.
DEA-Based Efficiency Assessment of Railway Diversified Enterprises
Authors: Geng Lian Song
Published: October 2013

On the basis of depth analysis of the new situation and tasks the railway facing. Ministry of Railways put forward a strategy of diversification. Therefore, it is necessary to conduct in-depth analysis of the Railway diversified business development efficiency. This article describes the basic theory of the efficiency assessment, analyzes the factors which influences the efficiency of the railway diversified enterprises and builds the efficiency evaluation index system of railway diversified enterprises .Based on DEA, this article establishes a railway diversified business efficiency evaluation model. We use the business data of railway diversified enterprises in 2008 as empirical, and the results show that the efficiency of the railway enterprise diversification is different in different industries. Further analysis revealed that ,the relative efficiency of the industry in railway diversified business is closely related to transportation business, and the closer the industry are to transportation industry ,the more efficient it is.
Engineering Training System for Jewelry Materials Majors
Authors: He Tao , Zhang Qiang
Published: October 2013

With the advanced materials industry, makes this especially machinery manufacturing industry has witnessed rapid development and become one of the very important part, therefore, material engineering colleges focus on the development has also become one of the disciplines. Train and improve their practical ability to adapt to the needs of society has become an important part of college students training, this thesis explores the materials engineering students' professional training system establishment, the students presented material class materials processing skills training methods Manufacturing engineering training through high students' practical ability and engineering sense.
Design and Fabrication of Magnetic Sensor Based on the Phase Characteristics of GMI
Authors: Wang San Sheng , Ning Xiao Shuai , He Tong Fu
Published: October 2013

This article presents a kind of high sensitive magnetic transducer which is based on the phase characteristics of giant magnet-impedance (GMI) effect. Then the development process of this new kind of magnetic transducer is discussed with the ideal condition of the GMI sensor elements (the frequency and the amplitude of the excitation current). Compared with the amplitude characteristics of GMI effect, the transducer can make a 10 to 100 times lower frequency. At the ideal condition, the sensor has a sensitivity of 1.6°/Oe, and we can conclude that the sensor has a potential to detect the weak magnetic.
Information Equivalent of Content for a Physics Learning Module
Authors: Gnitetskaya Tatyana N. , Ivanova Elena B.
Published: October 2013

This paper presents the idea of implementing a quantitative information equivalent for a learning module enabling the teacher to control the volume of contents comprising the module. Filtering, systematization and optimization of such contents can be performed based on information parameters calculation. A brief description of the sense structures and information parameters method, information volume and minimum perception time, is given. A graph on physics module on the topic Kinematics and Dynamics of a Material Point and an optimization example of the lecture included into the module are presented. The authors conclude that this approach will allow designing the modern learning process for the engineers-to-be taking into account the information limits.
Human Body Segmentation Based on Shape Model and Level Set
Authors: Deng Ying Na , Hou Xue Mei
Published: October 2013

Human body segmentation is important for object tracking and recognition. When there are multiple human bodies, because of inter-occlusion, human body precise segmentation is difficult. A segmentation method based on prior shape model and level set is proposed. Human coarse shape models are constructed with position, scale and posture. For each human body, its corresponding human shape model is obtained by model matching by which position is obtained roughly after model matching, and object precise contour is obtained through curve evolution by multiphase level set with initial contour obtained from shape model. The proposed method could segment human object precisely.
Sub-Pixel Edge Detection of Color Image Based on Dimensionality Reduction Technique and Curve Fitting
Authors: Xiao Feng , Guo Li Na
Published: October 2013

In order to solve the problem of the color characteristic information is often ignored in color image edge detection process, we propose a new color image sub-pixel edge detection method, which uses Ostu algorithm to get coarse positioning edges and extracts sub-pixel edge on the combination of curve fitting and coarse positioning edge in the projected image obtained by dimensionality reduction technique.Experimental results show that the algorithm positioning accuracy can reach 0.14 pixels,it is able to extract color image edge information effectively.
A Novel Threshold Selection Method Based on Iterative Clustering Strategy
Authors: He Jin Guo
Published: October 2013

This paper extends our previous algorithm for clustering. This previous algorithm works fine on simulated data. It can acquire satisfactory clustering results even with annular or zonal simulated data by causing the data to shrink within a cluster. To make use of the advantages of the previous algorithm, a one-dimensional (1D) histogram is mapped to a two-dimensional (2D) image and can be clustered by the previous algorithm, thus leading to stable results of histogram thresholds. The shrinking procedures of the 2D image or the 1D histogram are given, and a new parameter strategy is discussed.
Video Synopsis Generation Using GPGPU
Authors: Wang Zong Yue
Published: October 2013

Video summaries provide a compact video representation preserving the essential activities of the original video, but the summaries may be confusing when mixing different activities together. Summaries Clustered methodology, showing similar activities simultaneously, enables to view much easier and more efficiently. However, it is very time consuming in generating summaries, especially in calculating motion distance and collision cost. To improve the efficiency of generating summaries, a parallel video synopsis generation algorithm is proposed based on GPGPU. The experiment result shows generation efficiency is improved greatly through GPU parallel computing. The acceleration radio can reach at 5.75 when data size is above 1600*960*30000.
Research and Design of a New Kind In-Wheel Driving System
Authors: Chen Xin Bo , Lu Yun Yun , Wang Bin
Published: October 2013

In order to solve one of the main negative effects of in-wheel driving system, caused by heavy unsprung mass, a new kind of design is put forward: in which in-wheel motor is used not only as a driving part, but also as a mass element in a dynamic vibration absorber. By changing motor from unsprung mass into sprung mass, the dynamic vibration absorber is no longer constrained by in-wheel space and vehicle mass. Due to the reduction of unsprung mass, vertical performance of vehicle, especially wheel ground adhesion is improved. An efficiency, compact and reliable system is designed in the paper.
A New Adaptive Image Denoising Method Based on Wavelet Packet Transform and Neighbor Dependency
Authors: Huang Bin Wen , Jiao Yuan
Published: October 2013

In image processing, removal of noise without blurring the image edges is a difficult problem. Aiming at orthogonal wavelet transform and traditional thresholds shortage, a new adaptive threshold image de-noising method which is based on wavelet packet transform and neighbor dependency is proposed. Low frequency part and high frequency part can be decomposed at the same time in wavelet packet transform and the information contained in wavelet coefficients is redundant. Using this kind of relativity in wavelet packet coefficients, we use a new variance neighbor estimation method and then neighbor dependency adaptive threshold is produced. From the experiment result, we see that compared with traditional methods, this method can not only effectively eliminate noise, but can also well keep original images information and the quality after image de-noising is very well.
Adjustment Method between Phonological Attributes and Phone Boundaries
Authors: Zhang Lian Hai , Chen Qi , Qu Dan
Published: October 2013

Two kinds of imperfections, namely the detection errors and the asynchrony between phonological attributes and phone boundaries, can cause a substantial decline in recognition accuracy of a detection-based automatic speech recognition system. To solve these problems, an adjustment method between phonological attributes and phone boundaries is proposed in this paper. At first the prior knowledge of corpus and the detection results are combined, then the asynchronies in the phone boundary area are compensated and the detection errors are corrected; additionally, by selectively deleting some frames with errors, the precision of the phone models are improved. After adoption of this adjustment method, 1.4% of phoneme recognition rate can be improved in the TIMIT phone classification experiments based on Conditional Random Fields.