bluuebunny/crossref_metadata_2025 huggingface dataset:
Multi-Domain Modeling Simulation and Application Based on MapleSim
Authors: Cao Jia Ming , Wu Tao
Published: June 2013

In order to evaluate the ability of simulation of the software MapleSim, this paper introduces MapleSim software and its features. Experiments on two independent domains and one multi—domain physical are modeled and simulated. The multi—domain physical system has several outputs that can be shown as visible charts. Experiments demonstrate the MapleSim ability of modeling and simulation under complex condition. The result of simulation has highly reliability.
The Design and Application of Quality Information Management System of the Assembly Line of Engine
Authors: Chen Ru , Yang Ji Xin , Wang De Quan , Cheng Jin Shi , Tao Xue Heng , Wang Xue Jun , Zhang Li Ping , Wang Hui Hui
Published: June 2013

Automation monitoring system collects data from the assembly line of automation equipment and processes. The machine status and alarm data are displayed on the screen to prompt management personnel resolve the problem immediately; the LED of the workshop shows the yield information, and summarizes the current date and the output information of various types of engine; quality data is divided categorized and stored to be the base of the quality of the product line into the market. Provide assurance for the query and analysis of the quality management system; the improvement of the production quality and efficiency; and the traceability of the products. The system has been put into the production of commerce and can show the effectiveness of the system.
The Spatial Classification Algorithm of K-Nearest Neighbor Based on Spatial Predicate
Authors: Ma Yu , Gao Yu Ling , Song Shao Yun
Published: June 2013

Traditional k-Nearest Neighbor Algorithm (short for KNN) is usually used in the spatial classification; however, the problem of low-speed searching exists in this method. In order to avoid this kind of disadvantage, this paper puts forward a new spatial classification algorithm of K-nearest neighbor based on spatial predicate. This method searches the object set which is similar to the test object in spatial concept and uses spatial predicate to help search the object set, which narrows the searching range and reduces the operating time of KNN algorithm.
Physical Properties and Antibacterial Activity of a Chitosan Film Incorporated with Lavender Essential Oil
Authors: Zhang Zhi Hong , Qin Yu Yue , Fan Jian , Zhao Tian Rui , Cheng Chun Sheng
Published: June 2013

Chitosan-based films containing lavender essential oil (LEO) (0, 0.5%, 1.0%, 1.5% (v/v)) were prepared to evaluate their physical and antibacterial activities. In order to study the impact of the incorporation of LEO into chitosan matrix, the solubility, mechanical property, water vapor permeability, and antibacterial activity of the films were investigated. Fourier transform infrared chromatography (FTIR) was carried out to explain structure–property relationships. Results showed that the solubility and water vapor permeability of the chitosan-based film decreased by LEO incorporation. Films containing LEO showed better mechanical property. FTIR spectra demonstrated good interaction between functional groups of chitosan with LEO. With the concentration of LEO increased from 0 to 1.5 %, the inhibitory zone of four bacterial strains (Escherichia coli, Staphylococcus aurous, Bacillus magaterium, Bacillus subtilis) increased. It can be concluded that chitosan films containing LEO can be used for development of active food packaging materials.
Condition-Based Maintenance and State Diagnosis of Electric Equipment
Authors: Wu Shi Hong , Xu Xiao Di
Published: June 2013

Time-based maintenance is mainly used by power plants in our country. Through the study of the disadvantages of time-based maintenance, condition-based maintenance is proposed. This paper details the superiority and the concept of condition-based maintenance, the trigonometry fuzzy number theory and the fuzzy fault tree analysis have been proposed in the state diagnosis. This paper provides the reference to online monitoring and the levels of diagnosis. It’s a reliable plan that the application of condition-based maintenance to power plants.
Fuzzy Comprehensive Evaluation on Regional Development Level of General Aviation in China
Authors: Wen Xing Zhong
Published: June 2013

t can provide the basis on drafting the regional general aviation development policy for government departments and civil aviation regulatory agencies by analyzing the regional general aviation development level scientifically. The regional development level of general aviation in 2009 is chosen as the research object. According to the seven regional administration of Civil Aviation Administration of China (North China, Northeast, East China, Central and southern, Southwest, Northwest, Xinjiang), the region of general aviation is divided into seven parts. The evaluation system of operational scale and operational efficiency of regional general aviation is established. The weights of the seven indicators in the evaluation system are determined by Analytic Hierarchy Process (AHP) and the development level of seven region of general aviation is evaluated by Fuzzy Comprehensive Evaluation Method. Finally, the development levels of seven region of general aviation are settled by the values of Fuzzy Comprehensive Evaluation. The relative good and weak regions of general aviation development are identified.
Prediction of Soluble Solids Content of Jujube Fruit Using Hyperspectral Reflectance Imaging
Authors: He Jian Guo , Luo Yang , Liu Gui Shan , Xu Shuang , Si Zhen Hua , He Xiao Guang , Wang Song Lei
Published: June 2013

To predict soluble solids content (SSC) of jujube fruits, a hyperspectral imaging technique has been used for acquiring reflectance images from 200 samples in the spectral regions of 900-1700nm. Hyperspectral images of jujubes were evaluated from the regions of interest using principal component analysis (PCA) with the goal of selecting five optimal wavelengths (1034, 1109，1231，1291 and 1461nm). Prediction model of SSC (Rp=0.9027, RMSEP=1.9845) were built based on BP neural network. This research has demonstrated the feasibility of implementing hyperspectral imaging technique for sorting jujube fruit for SSC to enhance the product quality and marketability.
The Asymmetry-Center Probabilistic Fuzzy Set for Freight Turnover Forecasting in Changsha City
Authors: Wang Zhong Wei , An Yan
Published: June 2013

A freight turnover forecasting is an important issue of the logistics plans of a city. The probabilistic fuzzy set (PFS) is designed for handling the uncertainties in both stochastic and nonstochastic nature. Because of the asymmetric probabilistic fuzzy sets variability and malleability is higher than symmetric one. In this paper, an asymmetry-center probabilistic fuzzy set is proposed by randomly varying the center of asymmetric Gaussian membership function. Then the PFLS with this asymmetric probabilistic fuzzy set is constructed and applied to a freight turnover forecasting. The results show that the asymmetry-center probabilistic fuzzy set improves the accuracy of such system. This work will broaden the application of the probabilistic fuzzy set.
Brief Discussion on Manufacture and Application Value of Modern Paper-Cut Animation
Authors: Zhang Wen , Xie Ji Cheng
Published: June 2013

Paper-cut animation is rooted in Chinese folk culture, which is an important constituent part of Chinese animation. This article has analyzed the own artistic charm of paper-cut animation, from the early traditional manufacturing method and its insufficiencies as well as the questions we faced, to details of the new manufacturing method after the application of modern computer technology to the paper-cut animation. Also the article emphasizes the introduction of manufacturing advantages after the computer technology applied to the paper-cut animation, as well as discussions on application value of paper-cut animation in business and service domains, etc.
Feasibility Study on Material Selection of Corporate Brand Image Design
Authors: Meng Yan , Zhang Li
Published: June 2013

In the process of corporate brand image design, material selection is the first step of corporate brand image design and it shall obey the principle of environmental protection and resource conservation. Improvement of attention consciousness to green materials directly affects building of corporate brand image. From the angle of safety, in-depth study was done aimed at material application in corporate packaging and image wall; feasibility of its processing and implementation was discussed under the current technical conditions like property and functional structure of the materials to satisfy the limitation of sustainable development in the process of building brand image.
Research on Resource Optimization of Special Maintenance Vehicle Operation Based on Genetic Algorithm
Authors: Wang Tao , Zhang Fu Long , Li Guang Feng
Published: June 2013

This articles aims to research the special maintenance vehicle so as to optimize its resource allocation in operation, which belongs to the issue of fixed completion time-resource levelling. It makes analysis on the operation deployment process, critical path and procedure of the truck based on the RLP problem solving algorithm, and makes optimization allocation to the scheme by using genetic algorithm. The new allocation scheme after the optimization can increase the efficiency by 12.5% and realize the reasonable allocation of human resources.
The Application Research of the Traditional Materials Based on the Green Design of Products
Authors: Li Yan , Luo Hong , Qu Zhen Bo
Published: June 2013

The environment has been heavily polluted by various industrial productions. People began to realize the importance of protecting the environment. Therefore, the Green Design has become the theme of today's design. Traditional materials fit the theme of environmental protection because of their own properties. Due to the specific properties of traditional materials, they are used in todays products so the green product design begin to take on a new vitality. The paper investigated the green products using traditional materials, including domestic and foreign products. The aim of this subject is to explore the possible of the traditional materials and development trends in green product design, and propose a method that can creatively use the traditional materials to design a product which is humane and friendly to environment.
Press Forging Forming of Stepped Holes in Thick Sheet Metal
Authors: Cao Xu Jun , Wang Ke Sheng , Han Yu , Lin Chong Chao
Published: June 2013

Press forging forming of thick sheet metal is a combined extrusion process, which is put forward in the presently study. A new technological scheme for a two-step press forging of stepped holes in a thick metal sheet was proposed. Finite element analysis on the two-step process is carried out by using DEFORM-3D. Distributions of effective strain and effective stress were obtained. The study showed that the process not only can form the stepped holes, but also can increase the surface quality and strength of stepped holes in sheet metal parts, According to the numerical simulations process parameter, an experimental die was designed, the simulation results were in good agreement with the experimental data.
Characterization of Poly(Diethylene Glycol Adipate -co- Neopentylglycol Adipate) as a New Plasticizer for Poly(Lactic Acid)
Authors: Wan Tong , Zhang Si , Du Tao
Published: June 2013

A new poly (diethylene glycol adipate -co- neopentylglycol adipate) (PDNA) was synthesized from diethylene glycol adipate (DEAP) with neopentylglycol adipate (NPAP). The chemical structure of PDNA was characterized by 1H-NMR. PLA was plasticized by various amount of PDNA to obtain biodegradable blends. The effects of both temperature and shear rate on the rheologies of PLA/PDNA blends were evaluated by a parallel plate rheometer.
Studying on Hot Pressure Casting Process of CaZr0.9In0.1O3-α Tubes for Hydrogen Sensor in Aluminum Melt
Authors: Wang Dong , Li Sheng Li , Li Wei Juan , Li Ji Guang , Liu Jun , Xu Tao
Published: June 2013

The relationship of the powders and binder system and forming process on the quality of the U-shaped proton conducting CaZr0.9In0.1O3-α tubes was studied. The results showed that defect-free green bodies can be obtained under the conditions of the wax slurry containing 87.8% (mass percentage, the same below) proton conductor powders, 11% paraffin wax, 1% beeswax and 0.2% oleic acid, the wax slurry and mold temperature at 73°C and 30°C, the casting pressure and time at 0.5MPa and 15s. A reasonable wax removing schedule about the green bodies was put forward. At last the sintered samples were characterized by higher density and less shrink rate and distortion.
Studying Status and Application Prospect of Cryogenic Treatment on HSS
Authors: Jin Fang Wei , Zhou Zhi Ming , Qiu Li Mei , Wei Jian , Wu Long
Published: June 2013

Deep Cryogenic treatment is a new technology that was dated from the later middle of 20th century and gained widely utilization. It has been proven to be a efficient method for improving the mechanical properties and working life of the high speed steel (HSS) substantially by deep cryogenic treatment. This paper summarizes the cryogenic treatment and its mechanism on metal material. Moreover, the development process of deep cryogenic treatment on HSS and its current research at home and abroad were mainly introduced. Finally, some views and prospects of the industrialization of cryogenic treatment technology were putted forward.
Synthesis and Characteristics of Poly(ethylene terephthalate)/SiO2/TiO2 Hybrid Composites by Sol-Gel Method
Authors: Zhu Jiang , Xu Qiang , Liu Xiang , Liao Xiao Qing
Published: June 2013

Poly (ethylene terephthalate) (PET)/SiO2/TiO2 hybrid composites were prepared via the Sol-gel method that involves two steps: the as-prepared PET was dissolved into the mixed solution of phenol and dichloroethane by adjusting the pH value of the reaction system to 2～3 using acetic acid; then both the tetraethylorthosilicate (TEOS) and the tetrabutyltitanate (TBT) were successively added to the hybrid solution followed by the Sol-Gel reactions at strong stirring to form the three PET/SiO2/TiO2 composites with cohydrolysis-condensation reaction. The intrinsic viscosity of the hybrid composites were measured by using an Ubbelohde viscometer. The resulting products with the different SiO2-TiO2 content were thoroughly characterized with FT-IR.
The Color, Taste and Toxicity of Non-Ferrous Metals
Authors: Yu Dong Mei , Zhang Jian Bin , Li Juan Juan , Jia Jian Gang
Published: June 2013

The mechanical and physical properties of metals are closely related to engineering applications. As ecological materials, color, taste and toxicity of metals should be taken into consideration. Metals have specific colors, such as gold, silver, bronze and iron. "Metallic taste" is another taste different from the sour, sweet, bitter, saltiness and umami. Directives in European Union reveal different toxicities on the health hazards.
The Effect of SiC Content on the Microstructure and Thermal Conductivity Properties of SiCp/Cu Composites
Authors: Zhang Yun Long , Hu Ming , Liu You Jin , Gao Jing
Published: June 2013

in order to resolve the weaker wettability between the copper and SiC particles and analyze the micro-structure and thermal conductivity properties of the SiCp/Cu composites, the chemical plating technology and pressure-less sintering technique were utilized to fabricate SiCp/Cu composites. The results proved that SiC powders were more homogeneous in the SiCp/Cu composites and interfaces were clear. The coefficients of linear expansion of SiCp/Cu composites were nonlinear increased along with the measuring temperature increasing. When SiC content was constant, the coefficients of thermal expansion (CTE) and thermal conductivity (TCT) of the SiCp/Cu composites would reduce as the content of the SiC powder became higher.
The Patented Project Design for Preparing SnSe2 Nanosheets
Authors: Ma Zhong Quan , Liu Ke Gao
Published: June 2013

The patent design provides one method for preparing photoelectricity thin film used in solar cell. It belongs to the field of photoelectric film preparation technology. The SnSe2 nanosheet was prepared from the solid powders of SnCl22H2O and SeO2. The hydrazine hydrate, NaOH and ammonia are used as reducing agents and assistant agent respectively in the patent. It includes the steps of reacting, heating, washing, drying to prepared Tin diselenide. The obtained SnSe2 with high purity has good dispersivity, and regular and uniform shape. The method has a wide application prospect because of safety process and the pollution-free and manageability aided solution.
The Programming Strategie of High Speed Milling on Aluminum Ally Bowl-Shaped and Thin-Walled Part by Using Powermill Software
Authors: Lin Xin Gui , Yi Gen Miao
Published: June 2013

According to the particularity of aluminium alloy thin-walled bowl, the programming strategies for high-speed milling process were analyzed, including the tool path strategies, leading in/out, and the tool path connections. A programming example was used to illustrate the practical application of Powermill software in high-speed milling of aluminium alloy thin-walled bowl.
Tribological Properties of PVD CrAlN Coating Tools
Authors: Liu Ai Hua , Deng Jian Xin , Zhang Peng
Published: June 2013

The paper reports the tribological properties of the CrAlN coating tools at different speeds and loads. The coating was deposited on cemented carbide by cathodic arc physical vapour deposition technique. Ball-on-disc wear tests were performed on the CETR UMT-2 test system against SiC balls. The coating character and test results were obtained through SEM, XRD and Wyko surface profilometer. The results are as follows: The value of friction of coefficients decreased and depth of wear tracks became sallower as speeds increased and the coating presented adhesion phenomenon under low load. CrAlN coating showed excellent anti-wear properties at high speed and low load, and was more suitable for these similar working conditions.
Analysis Drive Index of A12 Oil Reservoir
Authors: Zhang Lei , Liu Guo Ming
Published: June 2013

A12 oil reservoir rock Mainly Sandstone and siltstone, Fine granularity, Mudstone cemented. Reservoir rock porosity Change range 0.18~0.22%,Average - 16%, Permeability range 1~316mD, Average - 46mD, A medium porosity, medium and low permeability reservoir. The reservoir development discontinuous, Heterogeneity powerful. Based on characteristics of A12 oil reservoir development, Application of material balance equation calculate the index for the driving of the various types of energy, compare all types of drive index of oilfield development role in the process, determine A12 oil reservoir reasonable to development method.
A Technique Method of Recycling Waste Liquid in the Sulfate Copper Plating Technological Experiment in the Laboratory
Authors: Lei Shi
Published: June 2013

It introduces a kind of technique method that recycling waste liquid in the sulfate copper plating technological experiment in the laboratory, involving the fields in electroplating and comprehensive utilization of waste liquid. This process includes the following steps: first filter the waste liquid to remove impurities in it, and then using electrolytical method to recycle copper in the waste liquid. Add NaOH, NaHSO3 into the solution, through chemical deposition remove heavy metal ions in the waste liquid, and carry on the harmlessization handle to sediments, finally deal with the waste liquid through a semipermeable membrane to get pure water. This process provides a kind of simple, easy to operate, low cost method for the treatment with waste liquid of electroplating produced in the laboratory, which is toxic and pollute the environment.
Determination of Bond Lengths and Electronic Structure of Cd1-xZnxTe Ternary Alloys by Synchrotron Radiation
Authors: Zheng Wei , Wu Yu Li , Chen Yen Ting , Geng Zhe Chuan , Lee Jyh Fu , Becla P. , Zheng Rui Sheng
Published: June 2013

High-resolution synchrotron radiation x-ray absorption spectroscopy on Zn K-, Cd L3- and Te L3-edges for Cd1-xZnxTe ternary alloys with x = 0.10, 0.30, 0.50 and 0.90 are presented. A detailed analysis of the extended x-ray absorption fine structure using the IFEFFIT program, and the chemical bonds of Zn-Te are obtained, suggesting distortion of the Te sub-lattice. The x-ray absorption near-edge structure of the Zn K-, Cd L3- and Te L3-edge are investigated, and the electronic structures of Cd1-xZnxTe with various compositions are studied.
Study on the Flow Field of Air Floating Pool of Pressurized Dissolved-Air Floatation Water Treatment System
Authors: Li Yan Min , Wang Pei Yan , Li Kun
Published: June 2013

This paper used the FLUENT software to analyze a flow field of the advection type air-float pool, the simulation analysis is applied to study of partition plates, water retaining plate and floatation pool length depth ratio and other key parameters which influence the flotation pool flotation effect .The research results provide the basis for the structure design of improving the flotation pool. It has a certain reference value for the same type of flotation pool design.
A Design of Algorithm for Excimer Laser Coaxial Observation Automatic Tracking Processing System
Authors: Xie Zheng Yang , Chen Tao , Liu Ning , Liu Shi Bing , Chen Ji Ming
Published: June 2013

This paper proposed a design of algorithm of an excimer laser coaxial observation processing system which can automatically track preset line. With using of the Visual C + + image processing technology and the least square method, the XY axis in both directions of processing platform can obtain accurate processing displacement, and stability control platform for real-time tracking a straight line center. Processing system can acquire the coordinate of processing place where can get the distance from the centre of image in order to achieve real-time tracking.
A Intergrated Compensation Device Design for Three-Phase Unbalance and Reactive Power of Low Line
Authors: Wang Hai Xiang , Zhou Wei Peng , Hang A Fang
Published: June 2013

The harm of high three-phase unbalance factor and low power factor is introduced. The design of hardware and software process is given. The design of AD circuit , adjust circuit , frequency detection circuit and thyristor switch circuit is illustrated.
Based on the Double SCM Real Time Control System Design of Drum Brake
Authors: Li Sui Ping , Chen Wei Dong , Yao Jing Jing
Published: June 2013

Based on single-chip microcomputer(SCM) control technology, designed a set of new brake automatic cooling control system. Through the hardware and software design of the system, and simulation test, proved that the system is reliable. The system can solve the problem of truck brake failure effectively.
Control Strategy for Space Manipulator Based on Genetic Algorithm Self-Tuning
Authors: Wang Chao , Dong Zheng Hong , Gao Yong Ming , Yin Hang
Published: June 2013

For questions of joint angle control of space manipulator, a method based on genetic algorithm PID self-tuning is proposed, which can improve the control accuracy of joint angle. We establish the dynamic model of the space manipulator and design the PID controller, and then using the genetic algorithm to tuning the PID parameters, and simulate in MATLAB. The result shows that the control performance of the space manipulator is improved, and the difficulties of traditional PID parameter regulation can be avoided by this method.
Design of Measurement System of the Center of Gravity
Authors: Li Fang
Published: June 2013

It is very difficult to confirm the position of the center of gravity irregular object.This paper introduces a new system,which can be used in measuring and adjusting of the center of gravity.The irregular object was put on the support parts,then the center of gravity was given.When the actual position was compared with the ideal position,the difference was given. Until actual position and ideal position were coincided,the machining was continuing. Matlab was programmed in this measure system. It will be applied widely in the future.
Design of Temperature Control System for Thermocouple Verification Based on Virtual Instrument Technology
Authors: Zhou Bing , Zhao Jing Hui
Published: June 2013

The thermocouple calibration temperature control system is constructed USB - 4716 200 ks/s, 16 multi-function USB module, JKH-C series thyristor phase shift trigger, PC machine as the main hardware, the U.S. National Instrument (NI) company Labview as the software development platform. According to the precious metal, base metal thermocouple wire thermoelectric EFM method to determine the temperature test point, the temperature control system using automatic control to test furnace temperature, and realize the visual operation interface. Temperature control accuracy: temperature deviation calibration point is less than ± 5 °C when testing the thermocouple, constant temperature stability: constant temperature's change is less than 0.2 °C /min in the thermocouple testing process.
Development of the Amplitude-Frequency Characteristic Tester Based on SCM Control
Authors: Liu Hai Jiang , Wang Hong Yan
Published: June 2013

In this paper, the development of the amplitude-frequency characteristic tester based on SCM control has been introduced. The digital frequency synthesizer has been adopted to generate the automatic sweep frequency sine signals so as to provide the reliable sources for the frequency characteristic tester. The amplitude and the frequency characteristics of the active network and the passive network can be obtained through changing the output signals of circuit measuring network by digital analogy as well as the operation program of the microcontroller under the input signals with different frequencies. In this paper, the working principles of tester, the software and hardware design for the frequency synthesizer signals, the hardware and software design of the data collection channels and the applications of LCD technology have been specially discussed.
Effect of Annealing Temperature on Resistance Switching Behavior of Bi4Ti3O12 Thin Films Deposited on ITO Glass
Authors: Sun Bing Cheng , Wang Hua , Xu Ji Wen
Published: June 2013

Nonvolatile of polycrystalline Bi4Ti3O12 thin films prepared by solgel method were studied, and the effect of annealing temperature on resistance switching behavior has been studied. The main point is accented on decrease the operation voltage. Two controllable resistance states were observed by applying voltage pulses. It was also found that the conduction mechanisms dominating the low and high resistance states are Ohmic behavior and Space Charge Limited Current(SCLC).
Mechanical Analysis of Snake-Like Robot for Colonoscopy
Authors: Feng Xiao Xiao , Jiang Fu Bing , Hu Hai Yan , Gu Hong , Cai Xiao Wei , Ni Jin Cheng
Published: June 2013

In order to develop a robot for colonoscopy, which can provide the same functions as conventional colonoscope, but much less pain and discomfort for patient, a snake-like robot with continuum structure is proposed. The mechanical structure of snake-like robot for colonoscopy is introduced and the angle of single section is calculated. The mechanical model of cantilever beam is built, the force diagram is drawn and the mechanical analysis of single section in bending process is mainly analyzed. Finally, ‘Pro/E’ is used to build model and simulate the process that the snake-like body goes through the colon. This paper lays foundation for the research on snake-like robot for colonoscopy.
Mixed Ant Colony Algorithm for Vehicle Routing Problem with Time Windows
Authors: Wang Jian , Li Hong Yun , Chen Hong
Published: June 2013

To optimize the vehicle routing problem with time windows(VRPTW), a mixed ant colony algorithm (MACO) was proposed to accomplish the vehicles’ scheduling. The pheromone adaptive volatile strategy takes real-time traffic status into consideration. Algorithm was accomplished on computer with the c# language.10 examples were calculated. Results show, MACO has a quick convergence rate, the result is stable.
Modeling and Simulation of Circulating Fluidized Bed Boiler Combustion System Based on Neural Network
Authors: Cui Lin Lin , Lai Hua , Yu Xiao Qian , Qi Ming Jie
Published: June 2013

According to the multivariable coupling、 large time delay, non-linearity and time-varying and other difficulties of circulating fluidized bed boiler combustion system, a kind of control technology based on neural network to circulating fluidized bed boiler combustion system was presented. Actual parameter data of a paper mill in Kunming and neural network control principle were used in the establishment of a circulating fluidized bed boiler combustion system mathematical model and modified BP neural network algorithm training. Results of MATLAB simulation show that boiler combustion system control precision was effectively improved and good effects in production and application were got.
Optimum Slide-Way Structural Design for a New Polarized Scattering Instrument
Authors: Shih Chien Jong , Teng Tso Liang , Liang Cho Chung , Huang Yong An
Published: June 2013

A new polarized scattering instrument is presented in this paper. The finite element analysis has been used to examine the static performances of this instrument so as to capture necessary structural characteristics. Consider the structural volume and tip deflection as objectives, a double-loop of topological and parametric optimization has been developed that result in the optimum material distribution and volume fraction. Such an optimum structure is further modified to a solid model for the optimum product design. The final results show that the tip deflection and material volume can evidently be improved consequently. The presented process of mechanical design skill can provide for creative mechanical engineering application.
Effects of the Mould Pressure and Mould Pressing Time on the Properties of Graphite/Phenolic Resin Composites
Authors: Li Mi Dan , Liu Dong Mei , Feng Lu Lu , Niu Huan , Lu Yao
Published: June 2013

Polymer matrix composites made from phenolic resin are filled with natural graphite powders. They are fabricated by compression molding technique. The density, electrical conductivity and flexural strength of composite are analyzed to determine the influences of mould pressure and mould pressing time on the physical, electrical and mechanical properties of composite. It is found that the density, electrical conductivity and flexural strength of composites increased with increasing mould pressure. Under pressure of 40 MPa for 60 min, the density, electrical conductivity and flexural strength of composites were 1.85 g/cm3, 4.35  103 S/cm and 70 MPa, respectively. The decreased gaps could be the main reason for the increasing of density, electrical conductivity and flexural strength as mould pressure increases. The results also show that the density of composites increased with increasing mould pressing time.
Research on Motion Characteristic Simulation of 8×8 Omnidirectional Platform
Authors: Zhang Yu Nan , Tian Peng , Yan Nan Ming , Shang Ying Hui , Li Nian Yu
Published: June 2013

Because 4×4 omnidirectional platform which designed has some motion disadvantages, this paper analyses the kinematic characteristic of 8×8 omnidirectional platform and builds the dynamic virtual model to get the translation chararteristic by coordinated simulation. By adding the arm shaft, it can climb the grade with 32 degree, climb stairs and achieve omnidirectional motion on the uneven road. It shows 8×8 omnidirectional platform has good motion characteristic by simulation. And it is the foundation for producing the real platform.
Research on pH Value for City Sewage Optimized Control Based on HDP
Authors: Lei Sheng Yong
Published: June 2013

During the city sewage treatment process, pH value has the nonlinear control characteristics of pure lag, large inertia and so on. This paper presents the adaptive system control method based on HDP (heuristic dynamic programming) in view of the above features. Three neural networks which are action, model and critic constitute a self-learning system for the approximate dynamic program the optimal performance index function to realize the optimized control on pH value. The emulation experiments show that this method has better control effects comparing with the traditional method PID on steady-state error, overshoot, response speed and anti-jamming ability.
Research of Intelligent Monitoring System of Tower Crane Based on RFID
Authors: Zheng Xi Jian , Zeng Jin Bao , Zhang Hong
Published: June 2013

To ensure the efficiency and safety of the construction, it needs to monitor the real-time work status of single tower crane and between each other. This paper briefly described the basic application of RFID technology. Then it applied RFID technology to the anti-collision system between two tower cranes and wireless communication system of the tower cranes group. As the important part of the perception layer of the Internet of Things, the application of RFID technology in wireless communication system of tower cranes group could improve the efficiency of the construction. It also ensured the safety of the construction. Finally, it built the monitoring system platform of the construction machinery group based on Internet of Things technology.
Synthesis and Characterization of Zn Phtalocyanine (ZnPc) Using Maghnite-Zn as Clay Catalyst
Authors: Belmokhtar A. , Yahiaoui A. , Hachemaoui A. , Belbachir M.
Published: June 2013

The synthesis and charaterization of a Zn-phtalocyanine is described. This compound is synthesized by microwaveassiseted methods. Here we report the synthesis of a phtalocyanine Zinc (ZnPc). The effect of the amount of catalyst and time on the polymerization yield of the polymers was studied. The structures were confirmed by UVvis and XPS sepctroscopies.
Adjusting the Influence Function Method for Subsidence Prediction
Authors: Saeidi Ali , Deck Olivier , Al Heib Marwan , Verdel Thierry , Rouleau Alain
Published: June 2013

Theextraction of ore and minerals by underground mining may induce groundsubsidence phenomena. These phenomena produce several types of ground movement likehorizontal and vertical displacements, ground curvature and horizontal groundstrain at the surface, and associated building damage in urban regions. Theinfluence function is a well-known and efficient method for the prediction ofthese movements, but its application is restricted to mining configurationswith the same influence angle around the mine. However, this angle may displaydifferent values when the mine is not horizontal or when other subsidenceevents already occurred near the considered mine.In this paper a methodology and analgorithm are developed, based on the traditional influence function method inorder to take into account different influence angles. This methodology isimplemented in the Mathematicasoftware and a case study is presented with data from the Lorraine iron minefield in France. Ground movements calculated with the developed methodologyshow a fair concordance with observed data.
Effect of Titanium on Microstructure of Al2014 Alloy Prepared by SIMA Process
Authors: Amuei M. , Emamy M. , Khorshidi R.
Published: June 2013

Forming in semi-solid state to achieve globular microstructure has an effective influence on mechanical properties of aluminum alloys. In this research, the Al2014 alloy was prepared by a semi-solid strain-induced melt activated (SIMA) process. In order to analyze the effect of titanium content on the macrostructure of Al2014, the optimum amount of titanium according to its efficiency on reducing the grain size was obtained. Then, specimens with optimum titanium content were prepared by the SIMA process. Cold working was applied on specimens by an upsetting technique. Cold worked specimens were heat treated at 595, 605, 615, 625 and 635°C and were kept at these temperatures for 30 min to achieve a globular structure. Observations through optical and scanning electron microscopy (SEM) revealed that by increasing the temperature, an increase in sphericity and grain size occurs. According to the results, optimum condition in order to achieve a fine and globular microstructure is keeping specimens at 625°C for 30 min.
Tensile and Fatigue Properties of Fe-Cu-C Sintered Steels
Authors: Surapunt Supachai , Mutoh Yoshiharu
Published: June 2013

Tensile and fatigue tests of two compositions of steels, Fe-0.6%C-l.7%Cu and Fe-0.8%C-2.1 %Cu sintered at wide range of temperatures from 900°C to 1200°C were carried out to investigate effects of element content and sintering temperature. When the sintering temperature was higher than 1100°C, Fe-0.8%C-2.1%Cu steel exhibited higher density, tensile strength, elongation and fatigue strength compared to the other steel. The higher Cu content results in the higher density because Cu contributes to liquid phase in the sintering process. The higher C content contributes to the higher tensile strength, elongation and fatigue strength due to formation of pearlite phase. When the sintering temperature was lower than 1000°C, density, tensile strength and elongation were low. However, the metal copper phase still remains after sintering.
Numerical and Experimental Analysis of Self Piercing Riveting Process with Carbon Fiber-Reinforced Plastic and Aluminium Sheets
Authors: Drossel Welf Guntram , Mauermann Reinhard , Grützner Raik , Mattheß Danilo
Published: June 2013

In this study a numerical simulation model was designed for representing the joining process of carbon fiber-reinforced plastics (CFRP) and aluminum alloy with semi-tubular self-piercing rivet. The first step towards this goal is to analyze the piercing process of CFRP numerical and experimental. Thereby the essential process parameters, tool geometries and material characteristics are determined and in finite element model represented. Subsequently the finite element model will be verified and calibrated by experimental studies. The next step is the integration of the calibrated model parameters from the piercing process in the extensive simulation model of self-piercing rivet process. The comparison between the measured and computed values, e.g. process parameters and the geometrical connection characteristics, shows the reached quality of the process model. The presented method provides an experimental reliable characterization of the damage of the composite material and an evaluation of the connection performances, regarding the anisotropic property of CFRP.
Ductile Damage in Tension and Bending for DP980 Steel Sheets
Authors: Troufflard Julien , Requena Guillermo , Thuillier Sandrine , Maire Éric
Published: June 2013

The mechanical behavior of DP980 steel sheets of 1.7 mm thickness has been investigated with both tensile and bending tests. Free bending tests were performed on square samples of 60mm side. The bending tool has a sharp radius of around 0.4 mm and the sample simply lies on two rollers. Scanning electron micrography observations were performed in order to check the occurrence of cracks, that indicate the onset of rupture in bending. Moreover, X-ray microtomography observations were performed on smooth and notched tensile specimen, with a specific small-size geometry, and bending specimen. Maximum void volume fractions of 1.5 10-3 were recorded and the influence of the triaxiality ratio was investigated, by changing the notch radius. In the case of bending, samples were cut in the bent area and void volume fraction distribution was analyzed along the sheet thickness. Material parameters for Gurson-Tvergaard-Needleman (GTN) model, associated with isotropic hardening and von Mises yield criterion, were identified from the tensile tests. Inverse identification was performed over the different sample geometries, showing that GTN model can not capture the triaxiality ratio influence. Finite element simulations of the bending test were then carried out, in order to compare experimental and predicted void volume fractions in the sheet thickness.
Polycrystalline Model Predictions of Flow Stress and Textural Hardening during Monotonic Deformation
Authors: Xie Qing Ge , Eyckens Philip , Vegter Henk , Moerman Jaap , van Bael Bert , van Houtte Paul
Published: June 2013

A series of mechanical tests in different specimen orientations was performed to study the anisotropic behavior of an IF steel (DC06). State-of-the-art polycrystalline models Alamel [1], VPSC [2], as well as the classical FC Taylor model were employed to predict flow stress curves. A two-stage Voce law was used to describe the single crystal shear stress-accumulated shear strain relationship. In this approach, the textural hardening and the dislocation hardening are effectively modeled separately. Results demonstrate that both the Alamel and VPSC models could reproduce the flow stress curves adequately. Also, the quantitative agreement of texture prediction is used to validate the model predictions. It is concluded that the better performance of grain interaction models compared to the FC Taylor model is mainly due to an improved prediction of the slip inside the constituting grains, and not in particular due to an improved prediction of texture evolution.
Physically-Motivated Elasto-Visco-Plastic Model for the Large Strain-Rate Behavior of Steels
Authors: Pipard Jean Marc , Balan Tudor , Abed-Meraim Farid , LEMOINE Xavier
Published: June 2013

A physically based elasto-visco-plastic constitutive model is presented and compared to experimental results for three different mild steels. The experiments consist of tensile tests at strain rates up to 103 s-1 and reverse shear tests. The model requires significantly fewer material parameters compared to other visco-plasticity models from the literature while exhibiting very good accuracy. Accordingly, the parameter identification is simple and intuitive, requiring a relatively small set of experiments. The strain-rate sensitivity modeling is not restricted to a particular hardening law and thus provides a general framework in which advanced hardening equations can be adopted. The model was eventually used as the basis for a homogenization approach at the phase scale; preliminary investigations showed the benefit of such an approach, where microstructure-relevant data can explicitly enter the model and may be used for material design simulations.
Application of Response Surface Analysis and Genetic Algorithm for the Optimization of Single Point Incremental Forming Process
Authors: Bahloul Riadh , Arfa Henia , Salah Hedi Belhadj
Published: June 2013

Single point incremental forming (SPIF) is a modern method of forming sheet metal, where parts can be formed without the use of dedicated dies. The ability of SPIF to form a part is based on various forming parameters. Previous work was not accomplished with the help of design of experiments (DOE), thus reducing the number of parameters varied at any time. This paper presents a Box-Behnken experimental design, which develops the numerical plan, formalizes the forming parameters critical in SPIF and analyse data. The most critical factors affecting SPIF were found to be wall inclination angle, incremental step size, material thickness and tool size. The main effects of these parameters on the quality of the formed parts were studied in detail. Actually this work aims to “optimize the thinning rate and the maximum force by considering the tool diameter and the vertical pitch as unknown parameters for two different wall angles and thicknesses”. To this purpose, an optimization procedure based on the use of response surface methodology (RSM) and genetic algorithms (GA) have been proposed for application to find the optimum solutions. Finally, it demonstrated that the developed methods can solve high non-linear problems successfully. Associated plots are shown to be very efficient for a quick localization of the region of the search space containing the global optimum values of the SPIF parameters.
Influence of Tool Geometry Variation on the Punch Force in Micro Deep Drawing
Authors: Behrens Gerrit , Vollertsen Frank
Published: June 2013

Micro forming processes are very well suited for manufacturing of small metal parts in large quantities and micro deep drawing provides a great application potential for the manufacturing of parts with complex shapes. But size effects like changed tribology and material properties usually result in smaller process windows for micro forming operations. Process caused wear as well as large inaccuracy in manufacturing of micro forming tools is responsible for geometrical deviation of the tools from nominal size. Both influences can have essential impact on the process window size and process stability. A better understanding of the influence of tool geometry on process stability can help to improve and optimize process control in micro forming. In addition, a quantitative judgment of the impact of wear and manufacturing inaccuracy will be possible. Therefore, in this study, the impact of different tool geometries on the punch force in micro deep drawing was investigated. Significantly varied tool geometries were punch diameter, drawing gap, punch and drawing die radius and shape of the die edge. FEM simulations as well as experiments were used to determine tool geometry influence on the punch force of a micro deep drawing process. Hereby, it was possible to classify each geometry variation regarding its impact on the punch force and therefore on one important parameter of the process stability. Results show that the greatest impact on the punch force was caused by modifications of the punch diameter and variation of the drawing gap. Changes in punch or drawing die radii proved to be of minor importance.
Friction-Spinning – an Innovative Incremental Forming Process for the Manufacturing of Functional Graded Parts
Authors: Homberg Werner , Lossen Benjamin , Struwe A.
Published: June 2013

Friction spinning is an innovative incremental forming process for the manufacture of tailor-made components with defined functionally graded properties. The process is characterized by the use of friction sub-processes for self-induced heat generation that can be employed for the defined thermo-mechanical treatment. Due to this in-process heat treatment, it is possible to extend the forming limits and achieve more complex geometries as well as favorable part properties. One very interesting application for friction spinning is the sealing of tube ends. There are a lot of conceivable application fields, including the substitution of soldering or welding operations in chemical engineering. Another interesting field is the use of this incremental forming process for industrial or automotive applications such as the manufacture of very slim cylindrical cups. An advantage of this method is the feasibility of defined control of the thickness distribution in the bottom and side wall area. This is supported by a new tool system with a pivoting forming tool. The pivot movement is controlled by a process control system. This system makes it possible to achieve different contact conditions between the tool and the workpiece during the process so as to attain a defined influence on the material flow and hence to enhance the attainable bottom wall thickness compared with previous fixed-angle tools. This tool concept thus offers an opportunity to improve the properties of the components as well as to manufacture new and complex geometries, such as hollow, fully closed roll type parts.