bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on the Conditions of Plasma-Induced Graft Acrylic Acid on Polyethersulfone Substrates
Authors: Li Ru , Liu Fen Fen , Deng Ji Fei
Published: December 2012

The use of low-temperature plasmas to modify the surface of substrates and grafted acrylic acid is discussed. Their surface composition characterized by attenuated total reflectance fourier transform infrared (ATR-FTIR) spectra and water contact angle. The results of various techniques indicated that acrylic acid could be incorporated in the membrane surface. The plasma treatment time，plasma treatment power and grafting time effect on water contact angle. The water contact angle decreased from 67° for virgin PES to 11° for the plasma-induced and 0° for grafted AA.
Surface Treatment of Chopped Basalt Fibers and Mechanical Properties of Wood-Based Composite
Authors: Xie Kai Fang , Liu Hua Wu , Hu Wei Wei , Sun Han , Yang Shu Wei , Yang Tian Yang
Published: December 2012

Chopped basalt fiber reinforced wood sawdust panels were glued using melamine modified urea-formaldehyde resin. In order to improve the interfacial property, the basalt fibers was pre-treated by silane coupling agent. The tensile and bending strengths of the wood composites were tested, which indicated that the tensile and bending strengths of wood composites both reached their maximum values, 17.359MPa and 37.331MPa respectively, when the concentration of silane coupling agent is 0.75%.
Study on Air-Conditioning Fiber/Cotton Blended Yarn Sizing Using Less PVA
Authors: Zou Wen Lin , Liu Hui Juan
Published: December 2012

The sizing of air-conditioning fiber/cotton blended yarn was carried out according to the method of quadratic regression orthogonal design. The sizing ingredients mainly consist PR-S, denatured starch and less PVA. The properties of the sized yarns such as breaking strength, breaking elongation, wear resistance and hairiness index were tested base on the practical production demands． The testing data was analyzed by using fuzzy comprehensive evaluation method. The comprehensive evaluation result of the sizing performance shows the synthetic performance of sizing will be better when the percentage of PVA, denatured starch and PR-S are 2.735%, 4.823% and 3.823%.
The Low Temperature Fracture of Asphalt Composite Reinforced by Basalt Glass Powder and Basalt Fiber
Authors: Lou Jian Li , Liu Hua Wu , Pang Ai Yun , Sun Han , Yang Shu Wei , Yang Tian Yang
Published: December 2012

The bending strength and failure stain at -10 oC were used to evaluate the anti-facture properties of asphalt composite in winter. The samples with lime rock powder had the basalt fiber contents 0%, 0.2%, 0.25% and 0.3%, respectively. The bending strength and failure stain curves were convex and the maximum values reached at 0.25% basalt fiber content, which were 11.52MPa and 3450 ×10-6. The difference of bending strength between the maximum and the control group was 5.4%, which was insignificant. The difference of failure strain between the maximum and the control group was 13%, which was significant. The samples with basalt glass powder had the basalt fiber contents 0%, 0.2%, 0.25% and 0.3%, respectively. When the fiber contents were 0.2%, 0.25% and 0.3%, the increments of bending strengths in comparison with the control group were 7.6%, 12.4% and 10.8%, respectively. The difference of failure strain between the maximum and the control group was 8.8%, which was remarkable as well. The basalt glass powder is better than the traditional lime rock powder, as the filler of asphalt composite.
The Preparation and Mechanical Property Study of Aluminum Borate Whisker/Phosphate Chrome-Alumina Wave-Transparent Composites
Authors: Wang You Ping , Liu Jing Song
Published: December 2012

Wave-transparent materials of aluminum borate whisker/phosphate chrome-alumina are synthesized through coating method. It is found that, from the TG-DSC image analysis, there are two endothermic peaks at 120 °C and 180 °C, respectively. Pressure and curing time at this temperature should be increased. The flexural and tensile strength of the composite material reach the maximum when the content of aluminum borate whiskers is 6%.
Polyester Bone Scaffolds Using Polymer Adhesives
Authors: Lou Ching Wen , Lu Chao Tsang , Tsai Ming Shiuan , Wen Shih Peng , Huang Chien Lin , Lin Jia Horng
Published: December 2012

This study creates a PET bone scaffolds with a stabilized structure. With various twists per inch (TPI), 150 denier polyester (PET) filaments are twisted into plied yarn, after which the optimal plied yarn is braided into PET bone scaffolds. The plied yarn is evaluated for mechanical properties to determine the optimal TPI. The maximum elongation of the plied yarn occurs when the TPI is at its optimal, 9. The PET bone scaffolds are immersed in sodium alginate (SA) solution and CaCl2 solution, respectively, and then observed by a stereomicroscope and evaluated for porosity. The surface observation of PET bone scaffolds indicates that the immersion leads to the adhesion of filaments and consequent, their compact arrangement, which results in a lower porosity of the bone scaffolds, but a greater tensile strength.
Study on Characteristics of Outlast Acrylic Fiber
Authors: Zhang Hai Xia , Zhang Xi Chang
Published: December 2012

To analyze the structure and performance of Outlast acrylic fiber, the fiber structure was observed respectively by FTIR spectra, X-ray diffraction and scanning electron microscope, the normal physical and mechanical properties were measured, and the thermo-regulated performance was investigated by differential scanning calorimeter, thermal gravimeter analysis and step cooling test. The results indicate that the structure and normal physical and mechanical properties of Outlast acrylic fiber are slightly different from that of normal acrylic fiber. Both the melting peak and crystallization peak of Outlast acrylic fiber are single peaks, and the phase change temperature range is applicable and the phase change enthalpy is high. The decomposition temperature of Outlast acrylic fiber is around 311.85°C. The cooling velocity of Outlast acrylic fiber decreases exponentially with the increase in time, and the thermo-regulated ability of Outlast acrylic fiber is better than that of normal acrylic fiber.
Research Progress in Nano-Cellulose Modification
Authors: Cheng Zheng Liang , Xu Qing Hua , Gao Yang
Published: December 2012

As an environmentally friendly material prepared from renewable natural resources, nano-cellulose demonstrates excellent properties, including high crystallinity, high purity, high surface area, unique optical properties, and high Young's modulus. Furthermore, it has the advantages of bio-based materials such as light-weight, bio-degradable, bio-compatible, and renewable. Therefore, the nano-cellulose shows a great potential for developing new composite materials with high performances. This paper summarizes the ways for chemically modifying nano-cellulose to obtain better dispersion and improve its compatibility with nonpolar or hydrophobic matrices in nano-composites.
Influence of Polyacrylate on the Compatibility in P(MMA/EA)/PU Semi-IPNs
Authors: Jian Xiao Xia , Xiao Le Qin , Zhou Wei Liang , Ding Hai Qin
Published: December 2012

The Semi-Interpenetrating Polymer Networks(Semi-IPNs) of poly(methyl methyacrylate/ethyl acrylate)(P(MMA/EA)) and polyurethane thermoplastic elastomer (PU) were synthesized by PU and copolymer of methyl methacrylate and ethyl acrylate to improve the compatibility of polymethyl methacrylate(PMMA) and PU Semi-IPNs . The structure and properties were investigated by Fourier transform infrared spectrometer, Solid nuclear magnetic resonance spectrometry, Dynamic mechanical thermal analysis and Mechanical properties. The tensile stress of (P(MMA/EA)/PU)( P(MMA/EA):PU=3:7) can get to 9.6MPa, the additional physical crosslinks and entanglement for Semi-IPNs are the reasons.
Fabrication and Mechanical Properties Analysis of Flame-Retardant Fiberboards Made of Abandoned Flax Fibers and Polyurethanes
Authors: Lv Li Hua , Zuo Min , Wei Chun Yan , Wang Xiao , Wang Ke
Published: December 2012

In this paper, abandoned flax fibers were adopted as reinforcing materials, polyurethane particles were adopted as matrix materials. Through blend mastication and hot-pressing methods to exploit flame-retardant fiberboards, which were made of abandoned flax fibers and polyurethanes. This paper explored the mechanical properties and flame-retardant property.Tensile strength, bending strength and impact strength were selected as mechanical properties' test index, limiting oxygen index was selected as flame-retardant property's test index. Abandoned flax fibers mass fraction, hot-pressing temperature, hot-pressing time and flame-retardant mass fraction acted as level of factor. The optimized processing conditions were concluded through orthogonal experiment and the range analysis: abandoned flax fibers mass fraction 45%, hot-pressing temperature 170°C, hot-pressing time 6 min, flame-retardant mass fraction 10%. This paper studied the solution of the abandoned fibers’ reuse. At the same time, it provided theoretical guidance for the further development of flame- retardant polyurethane fiberboard.
Study on Hygroscopicity/Easy Dry Properties of Cooldry Polyester Knitted Fabrics
Authors: Zhai Ya Li , Bai Li Hong
Published: December 2012

The prupose of this paper was to study hygroscopicity /easy dry properties of Cooldry knitted fabrics to facilitate product development. The capillary effect, moisture absorption, time of drip-diffusion, amount of evaporation, moisture permeability and ventilation properties of knitted fabrics made of different fabric structures and fiber contents such as Cooldry, soybean protein/Cooldry, soybean protein fiber, polyester/cotton were tested to evaluate their hygroscopicity /easy dry properties using grey clustering analysis. The results show that the Cooldry knitted fabrics are superior to soybean protein or ordinary polyester/cotton knitted fabrics in hygroscopicity /easy dry properties , and the eyelet structure fabrics knitted by interlock compound stitch have better hygroscopicity /easy dry performances than other structure fabrics.
Analysis Twitter Management Platform of College Enrollment and Employment Services
Authors: Di Guo Qiang , Cao Wen Li , Luo Rui , Zeng Xiang Qi
Published: December 2012

Enrollment and employment service is an essential organic component of the higher education teaching process, In this IT era ,with computer popularization and the network technology rapid development, using the advanced technology of computer science to design and manage plays an important role in the development of universities. Twitter is a new Internet media today which attracts the abnormal attention among the world. It has many features, such as interaction, community, immediacy, convenience, originality and back to face and so on. Based on the features of Twitter, it will have great potential to apply Twitter to the modern education of universities, enrollment and employment services, etc. Twitter Management Platform of Enrollment and Employment Services is mainly to provide employment services for college students and do the preparatory work for the recruit of the students who are about to enter the college. Meanwhile it also provides convenience for the interaction among teachers, the interaction among students, the interaction among teachers and students.
The Ontology Based Model of Distance Education Ecosystem
Authors: Wu Qing
Published: December 2012

The problems of too much emphasis on technology lack of people-centered educational philosophy, and the construction of the distance education system lack of system concept and the overall view. In this paper, the modern distance education ecosystem models based on ontology in developed. This paper analyses the learner model specification established by the Committee of Chinese education information technology standards, the ontology-based distance education ecological subject is constructed. After analyzing cognitive psychologists Anderson's Taxonomy of Educational Objectives, ecological environment ontology is promoted. On this basis, the modern distance education ecosystem model is designed. We focus on the use of distance education ecological ontology in modern distance education ecosystem. This paper provides theoretical support for the building of modern distance education ecosystem, and the technical guidance for the design of distance education ecosystem.
Study on Performance of Organic Cotton Knitted Fabrics
Authors: Kong Fan Rong , Chen Li Na , Yang Ming Xia
Published: December 2012

This paper analyzes the performance of organic cotton fiber. Through the analysis of performance of ordinary cotton and organic cotton knitted fabrics, it was found that the mechanical properties of the organic cotton knits are somewhat less than ordinary cotton knits and there is no difference in wear ability between the two.
The Optimization Design for Protection Plate Structure of Honing Measuring Head
Authors: Liu Yong Ping , Nie Jia Peng , Gong Jun
Published: December 2012

In order to improve the pneumatic gauging precision of honing process, according to the pneumatic gauging characteristic of honing machine, the mathematical model of air current state in measurement process is established with oblique shock wave theory. Through setting up different fillet on protection plate, the air flow state of measurement process could be improved. The change of gas velocity, temperature and pressure was analyzed for different protection plate structure by fluid simulation software, the validity of the theoretical analysis was verified, which can provide the theory basis for structure optimization of the honing head.
Metal Nanoparticle Production by Anode Jet of Argon-Hydrogen DC Arc
Authors: Watanabe Takayuki , Tanaka Manabu , Shimizu Tasuku , Liang Feng
Published: December 2012

The purpose of this paper is to prepare nickel particles by arc plasma method with hydrogen addition. The effect of anode jet formation on the nanoparticle production was investigated by high-speed camera observations. The high-speed camera system with appropriate band-pass filters successfully provides the observation of anode jet image without cathode jet image. The areas of the anode jet and the cathode jet were separately estimated from the high-speed images. From these observations, the periodical fluctuation of the anode jet was confirmed. Higher hydrogen concentration leads to larger anode jet area, resulting from the enhanced evaporation of the anode material.
Development of Natural Fiber Reinforced Laminated Hybrid Composites
Authors: Bakkal Mustafa , Savas Mehmet
Published: December 2012

In this study, mechanical properties of composite laminates reinforced with various forms of glass fibers have been investigated. Tensile testing, impact testing and optical microscopy and SEM analysis results were discussed. The results of glass fiber reinforced novel composite material have been compared with the results of a commercial car front bumper material tests performed in same conditions. Study concluds that glass fiber has positive hybridization effect and increased tensile strengths, elastic modules and impact strengths in laminar hybrid composites.
Effect of Applying Air Pressure on Gas Porosity in Lost Foam Casting of Al-Si Alloy
Authors: Niakan Ali Asghar , Idris M.H. , Ourdjini A. , Karimian Majid
Published: December 2012

The paper presents the result of investigation on aluminum-silicon (LM6) alloy cast using pressurized lost foam casting process. The study investigated the effect of pressure and sand size on porosity of the casting produced. Air pressure of 1, 2, 3 and 4 bars was applied on the solidifying alloy poured in mould of sand sizes 16-30, 40-60, 60-100 (AFS). The porosities of casting were measured using optical microscope which was equipped with image analyzer. For porosity of castings, all surfaces of solidified castings were captured by digital camera for better observation. The results show that applying pressure during solidification of the LM6 alloy has significant influence on casting porosity of the alloy. By increasing the applied pressure, the porosity percentage based on gas porosity decreased when pressure was applied. Consequently, the removal rate of gas porosity improved by increasing the sand size to finer size 60-100 (AFS), so there is less gas porosity in samples. Besides, rising air pressure lead to fulfilling of molten which improves the casting porosity.
Study on the Data-Bases for Fire Engineering Design of Structural Steels Members
Authors: Kwon In Kyu , Kim Hyung Jun , Kim Heung Youl , Cho Bum Yean , Cho Kyung Suk
Published: December 2012

Structural steel has been used since the early 1970’s in Korea as primary structural members such as columns, beams, and trusses. The materials have much higher strength such as fast construction, high load bearing capacity, high construction quality but those have a fatal weakness as well. Load-bearing capacity is going down when the structural members are contained in fire condition. Therefore, to protect the structural members made of steels from the heat energy the fire resistance performance required. Generally, the fire resistance performance have evaluated from the exact fire tests in fire furnaces. But the evaluation method takes much more time and higher expenses so, the engineering method requires. The engineering method not only adopts a science but also an engineering experience. In this paper, to make various data-bases for evaluation of structural members such as columns(H-section, RHS), beams, loaded fire tests were conducted and derived not only each limiting temperature but also fire resistance respectively.
Research on Welding Repair for Tee Joint Crack of Subcritical Power Station Boiler Platen Superheater Header
Authors: Wang Qing , Zheng Xiang Feng , Feng Yan Ting , Niu Xiao Guang , Hao Xiao Jun , Li Wen Bin , Zhao Ji Feng , Dong Guo Zhen
Published: December 2012

Through methods, such as microscope analysis, metallography examination, the causes resulting in tee joint crack of subcritical power station boiler platen superheater header have been analyzed. The result indicates the tee joint crack originated in the original defects, expanded to connect with reheat cracking and leaked finally. In repair crack, the measures of reducing residual stress, such as lower welding heat input, reducing thickness of welding layer, hammer blowing, assigning reasonably heat treatment power ,lengthening holding time and so on, were taken. The welding repair succeeded greatly.
Hybrid Welding of AA5754-H111 Alloy Using a Fiber Laser
Authors: Casalino Giuseppe , Campanelli Sabina , Ludovico Antonio D.
Published: December 2012

The new generation of high power fiber lasers presents several benefits for industrial application. Nevertheless, due to the small spot size of the laser, the fiber laser has difficulties in some welding applications. These shortcomings can be overcome by laser-arc hybrid welding technique such as laser-gas metal arc welding or laser-gas tungsten arc welding. In this work, a high power fiber laser was coupled to an arc welder and the AA5754-H111 magnesium aluminum alloy was welded. The trials were carried out using laser leading configuration. A new generation of high power fiber laser was used. The experimental trials included process parameters such as laser power, welding speed and arc current. Microstructure, microhardness and weld appearance were analyzed. The experimental results showed that laser leading configuration produces full penetration for some welding parameters. The obtained results worth a larger investigation based on the experimental design technique.
Parameter Optimization in Al6061/HIF GA Steel Friction Stir Lap Welds
Authors: Das Hrishikesh , Basak Sushovan , Das Goutam , Pal Tapan Kumar
Published: December 2012

Friction Stir welding has been attempted to study the feasibility of FSW between aluminium sheet (AA 6061) of 2 mm thick and Zinc coated steel (HIF-GA) sheet of 1 mm thick in lap joint configuration. The interfacial area of dissimilar welds has been analyzed by XRD, EPMA,TEM with EDS and nano indentation technique to identify the IMC distribution pattern depending on the combined effect of rotational speed and travel speed as well as the effect of energy and thermal cycle. The average joint strength is significantly influenced by the thermal cycle, respective torque and combined effect of rotational speed and travel speed as well as energy input. Improved joint strength between Al and coated steel could be obtained within a combination of rotational speed and travel speed as well as energy input. Force and torque response during FSW have been analyzed in terms of parameter optimization and joint performance.
Characterization of Chemically Synthesized Ag2Se Nanowires via Anodic Alumina Membrane as Template
Authors: Singh Ranjeet , Sharma S.K. , Chakarvarti S.K.
Published: December 2012

Highly ordered nano crystallized Ag2Se nanowires of diameter 200 nm have been successfully prepared through direct chemical method using Anodic Alumina Membrane (AAM) as a template; AgNO3 as cation precursor agent and Na2SeSO3 as Se precursor, respectively at room temperature. The qualitative analysis of the EDAX spectrum of nanowires shows that the atomic composition of Ag and Se in synthesized nanowires is close to 2:1 stoichiometry. XRD spectrum confirms orthorhombic structure. UV-Vis absorption spectrum provides estimation of the optical band gap 1.41 eV of nanowires.
Improving the Performance of the Cluster Identification Algorithm for Grouping in Advanced Manufacturing
Authors: Cheng Chun Hung , Chu Pok Nan , Ng Tobin Dorbin
Published: December 2012

Advanced manufacturing concepts such as cellular and flexible manufacturing may require the formation of part families and machine cells. Many algorithms have been proposed for this and cluster identification (CI) is one such approach. The original CI approach is effective only for perfectly separable cases. Followup efforts use a branch and bound framework to make the CI approach work in partially separable cases. Although the branch and bound framework is useful, it may still produce infeasible solutions. In this paper, we adopt an improved branching scheme to deal with the problem. Computational results are also reported.
Computer Aided Design Based on Visual FORTRAN and AutoCAD
Authors: Li Yu He , Xu Peng , Bai Xin Li
Published: December 2012

Aimed at disadvantages of tedious work of the gear teeth design, Visual Fortran is taken as the development platform, and design data are stored and managed by self-developed program and database technology. A CAD System for Gear Teeth named GTCS is researched and developed. The system integrates designing and drawing in a body, and fully uses the powerful numerical calculation function of Visual Fortran and the function of Windows interface design, as well as the secondary development function of AutoCAD and database technology, etc. The software can realize designing and calculating of involute gear teeth and transmission mechanism, automatic drawing and various kinds of results post-processing. Results show that the research results greatly improved the efficiency and quality of the design. The result documents are easily accessible by other structural analysis software (such as SolidWorks, ANSYS, ADINA, etc) and similar design software, and convenient to use for the follow-up work.
Time Synchronization of Laser Scanner and Robot
Authors: Kang Hee Shin , Kwak Sung Jo , Suh Jeong
Published: December 2012

On this paper, a study of robot based remote laser welding technology for manufacturing light car body was conducted. Laser welding and industrial robotic systems were used with robot-based laser welding systems. The laser system used in this study was 1.6kW fiber laser, while the robot system was Industrial robot (payload : 130kg). The robot-based laser welding system was equipped with a laser scanner system for remote laser welding. Laser patterning on the fly needs to control some parameters to accomplish the desired shape and good quality of the welded pattern. The scan path and the mark speed as two control parameters of the laser scanner are numerically computed from pattern shape and robot motion. However, time-delay in operation of the laser scanner and the robot makes unexpected geometric error between the desired pattern and the welded pattern. The pattern sequence and the robot path is optimized to reduce total processing time. The proposed method is tested with various patterns and robot paths, and the welded patterns are validated by measuring their geometries and positions. Finally, the experimental results show that our method is suitable for laser patterning on the fly. The welding joints of steel plate and steel plate coated with zinc were butt and lapped joints. The quality testing of the laser welding was conducted by observing the shape of the beads on the plate and the cross-section of the welded parts, analyzing the results of mechanical tensile test. The remote laser welding system with laser scanner system is used to increase the processing speed and to improve the efficiency of processes. This paper proposes the robot-based remote laser welding system as a means of resolving the limited welding speed and accuracy of conventional laser welding systems.
The Development of CAD Software for Manufacturing Flat-Face and Roller Cam Systems
Authors: Simolowo Emmanuel Oluwafunbi
Published: December 2012

Computers have made the greatest impact in the advancement and development of almost all aspect of human endeavour, particularly in the engineering field. In this research, effort is geared towards improving the universal design and final manufacturing of commercial cams in many automotive and other related companies around the world. A software package for the design and profile simulation of plate cams with a possible choice of two followers (Roller and Flat-Face) using eight standard cam motions for over one hundred and eighty-nine different follower profiles has been developed. The developed software provides the tools to analyze critical aspects of cam design before physical prototyping or production of such cams and followers, thereby increasing their reliability and performance. The developed software does not only remove the tedium associated with cam design process but also speeds it up dramatically thereby making the process of comparative design analysis and optimization easier and faster.
An Improved Ant Colony Algorithm Based Dynamic Scheduling Method in Job Shop with Parallel Machines
Authors: Zhang J. , Yang J.G. , Qin W. , Li H. , Xu Z.G.
Published: December 2012

In this paper, the authors analysed the impact of machine breakdowns in job shop scheduling problem with parallel machines. A mathematical model with the objective of minimizing the weighted value of makespan and early due date was established. An improved ant colony dynamic scheduling algorithm combined with elite strategy and max-min ant mechanism was designed. Simulation experiments were designed and numerical results verified the superiority of the proposed approach.
Influence of Density on the Thermal Conductivity of Fiberglass Felt
Authors: Yang Yong , Cheng Xue Yu , Chen Zhao Feng , Fu Ren Li , Chen Zhou , Qiu Jing Lian , Su Dan
Published: December 2012

The influence of density on the thermal conductivity of fiberglass felt is studied by experiment.Experimental data obtained using the coefficient of thermal conductivity measuring instrument(Germany Netzsch HFM 436).The results show that the thermal conductivity of the low-density fiberglass felt increases with the increasing of density，when the density of fiberglass felt is below a certain value,the thermal conductivity is tend to a stable value.At last the conclusion that using the heat-transfer mechanism of the porous materials explains this phenomenon has also been drawn by experiment.
Improvement on Development of CAD Software for Shaft under Various Loading Conditions
Authors: Adekunle Adefemi Adeyemi , Adejuyigbe Samuel B. , Mudashiru Lateef O.
Published: December 2012

In time past, designs of shafts were conservative in approach as relatively low working stresses were employed to cover up for unknown “Factors of Ignorance”. [1]. And where high stresses are involved, greater shaft dimension is employed for such design. This approach necessarily made the production cost high as quite a lot of materials are involved in such production. The primary reason for such approach is to safeguard the shaft failure in most operations. Unfortunately, the mechanism of failure mode was not well understood and because most of the applications in which shafts are employed are of great importance, which in some cases affects life negatively (i.e. involving loss of lives) and distortion of operations. Despite all these developments, designers are still faced with the problems of working with large numbers of formulas, computations and iteration procedures involved in the design of shafts. These have made the design procedures of shafts both cumbersome and rigorous, hence time consuming. This problem becomes more pronounced if the designer is interested in seeing the effects of the variation of one or more design parameter, this means he has to start again from scratch. Fortunately, these problems can be overcome if the various advantages, utilities and flexibilities which modern high – speed micro – computers offer are put into good use in the design of shafts. This study was carried out to design shaft under various loading conditions using Computer Aided Design, and results gotten proved that it saves wastage of materials, and it safes time as well A software package (or program) was developed using the formulas initially derived and a numerical procedure for computing the deflection using the double integration methods. The Programming language used was Visual Studio C#. This objective was achieved in part as the program so developed satisfactorily handle design based on strength and safety of the shaft.
Cemented Carbides for Machining of Heat-Resistant Materials
Authors: Adaskina A.M. , Grigoriev S.N. , Vereschaka A.A. , Vereschaka A.S. , Kashirtsev V.V.
Published: December 2012

The optimum ratio of rhenium and cobalt in Co-Re binder of a cemented carbides based on the analysis of phase diagrams and studying the carbides properties is defined.It is shown that properties of carbide binder at the same ratio of rhenium and cobalt are also the same, and the carbide properties are determined by the amount of carbide binders.Researches of wear resistance of the tool from carbides with Co-Re binder at machining of a constructional steel and hard-to-machining alloys have confirmed their high efficiency.
Risk Analysis for Utilizing Cloud Computing - In Perspectives of Legality, Hardware and Non-Hardware
Authors: Fan Chiang Ku , Chiang Chen Mei Fan , Lee Yu Hsuang
Published: December 2012

There is little objective, scientific research focused on evaluating the loss exposure that results from cloud computing. In this study, a modified Delphi method and the analytic hierarchy process were employed to identify and evaluate risks of cloud computing. The findings of this study are: (1) Loss exposures attributable to Jurisdiction, Burglary, Natural disaster, Normal wear and tear or malfunctions are characterized by high frequency but relatively low severity. (2) Loss exposures attributable to Privacy, Damaged or spoiled by employees intentionally or accidentally, and System vulnerability can be addressed through insurance. (3) Risks generated through Agreement or contract, Social engineering, Mistakes made by employees intentionally or accidentally, and Cross-cloud compatibility are characterized by both high frequency and severity.
Computer Simulation of Steel Industrial Casting
Authors: Ramírez-López A. , Muñoz-Negron D. , Palomar-Pardeve M. , Romero-Romo M.A. , Cruz-Morales V.
Published: December 2012

The present work illustrates the procedure to simulate computationally the continuous casting process of metals.This is the most popular method to produce metals ingot without interruption. This procedure is useful to cast metals and alloys such as steel and aluminum.The algorithms have been developed to provide appropriated and efficient tools for reading data and display the simulation on the screen using a graphical user interphase(GUI).Analysis of the industrial processing allows to test and correct probable situations avoiding problems and risks;moreover computer simulation allows to identify critical aspect of the kinematics procedure and evaluate productivity.
The Review of Algorithms to Correct Barrel Distortion Image
Authors: Qi Min , Zhang Xiao Xi , Li Da Jian , Fan Yang Yu
Published: December 2012

Aiming at solving the problem of correcting barrel distortion of image, this paper concluded the common correction algorithms into three types which include Affine Transformation, Two Degree Polynomial Transformation and Polar Coordinate Transformation, and introduced the basic theory of each of their representative algorithm. Then, analyzed and compared the advantages and disadvantages of them according to the correction experiments. At last, pointed out the research directions and difficulties of this field. In conclusion, Polar Coordinate Transformation is the most appropriate method to correct barrel distortion image, and the improved algorithm based on Polar Coordinate Transformation is more flexible to work out current difficulties of this aspect.
Controlled Patterning and Dimensional Control of Suspended Carbon Nanofibers
Authors: Canton Giulia , Bisht Gobind , Kulinsky Lawrence , Madou Marc
Published: December 2012

A simpleand inexpensive top down approach to fabricate micropatterned carbon micro- and nano-fibers has been developed combiningCarbon-MEMS technology, Low Voltage Near-Field Electrospinning (LVNFES),and isotropic dry etching.A multitude of applications can take advantage of these patterned carbon nanofibers especially in the field of electrochemical sensors and nanoelectronics. In particular, wehave developed a novel polymeric ink that exhibits excellent electrospinning capability in a LVNFES setup and that does survive the pyrolysis process. To illustrate the potential of this new ink, we have fabricated carbon fiberssuspended on Carbon-MEMS structures.The fiber thickness can be controlled by adjusting the LVNFES voltage and using isotropic oxygen plasma based dry etching.
Cutting-Edge Engineering - An Innovative Approach to Better Support the Engineering and the Life Cycle of Automated Production Systems
Authors: Merhof Jochen , Franke Jörg
Published: December 2012

This article describes how a future engineering of production systems could look like and what the benefits would be. The presented concept is requirement-based and uses a role-concept and aggregation to deal with the increasing complexity of mechatronic systems. The aim is to counteract the increasing complexity of the systems. For this purpose, strategies must be identified and implemented to achieve this. Finally, an approach for implementing this concept is described.
A Study on the Development of Tool Planning for REF SILL OTR-R/L Auto-Body Panel by Using Forming Analysis
Authors: Jung D.W. , Kim D.H. , Kim B.C.
Published: December 2012

The characteristics of the sheet metal process include the loss of material during the process, short processing time and excellent price and strength. The sheet metal process with the above characteristics is commonly used in the industrial field, but in order to analyze irregular field problems, a reliable and economical analysis method are needed. The finite element method is a very effective method to simulate the forming processes with a good prediction of the deformation behaviour. Among the finite element method, the static-implicit finite element method is applied effectively in order to analyze the real-size auto-body panel stamping processes, which include the forming stage.
New CNC Machining Method for Sculptured Surface Using Non-Ball-End Tools
Authors: Zhou Kai Hong , Liu Dian Ting
Published: December 2012

In current multi-axis CNC manufacture technology, the sculptured surface has to be approximated to simplify its complexity, therefore, the current machining methods can not fully exploit the flexibility of the multi-axis CNC tools and offer the prospect of higher machining efficiency and better machining quality. A new theory (Envelope-Approximation Theory) was presented to generate the sculptured surface by maximizing the machined strip width based on the moving frame. The differential geometry based on the idea of the moving frame was discussed to determine the related motion of the tool and the workpiece. The optimized model of the related motion of the tool was established to enable the envelope of the tool surface approximate to the predesigned surface aiming at the least warping. Simulated examples based on Matlab7.0 demonstrate the improved machining efficiency and precision of the Envelope-Approximation Theory over current published methods.
Prototyping as a Tool for Rapid Development of Components for Sporting Equipment
Authors: Stadler Ctibor , Krotak Stanislav , Neuman Jan , Masek Bohuslav
Published: December 2012

The purpose of this article is to demonstrate the potential of hydroforming process combined with the Engineering Design Science (EDS) in single piece production of a technical product. The chosen demonstration product for this integrated approach is a ski riser for extreme carving. Its load-bearing base is an intricate-shape part that is well suited for modified hydroforming process in an isostatic press. In order to reduce production costs, rapid prototyping and rapid tooling methods were used.
A Design of New-Type Pipe Thread Forming Machine Based on Pro/E
Authors: An Mei Ling , Du Yan Gui
Published: December 2012

The pipe thread forming machine was innovatively designed in the article, using Pro/E as a design tool, we built the structural model of the pipe thread forming machine and performed interference detection and movement simulation for it, on the basis of this, we made a physical prototype. And our experiment showed the complete machine has the characteristics of high efficiency, tight structure, small volume and light weight, and it was easy to move.
Multi-Role-Based Employee Performance Appraisal Method for Manufacturing Enterprise
Authors: Zhou Lin , Wang Hui Fen , Liu Lin Yan
Published: December 2012

Employee performance evaluation is a key part for the enterprises to improve human resource management. It provides a way of managing and motivating staff for modern enterprises. In order to solve the problem of performance appraisal for the employees of manufacturing enterprise, a model of multi-role-based performance appraisal is put forward based on the comprehensive analysis of organizational structure. Taking sales manager of a manufacturing enterprise as an example, with the integrated using of Analytical Hierarchy Process (AHP) and Fuzzy Comprehensive Evaluation (FCE), the method of performance evaluation is proposed, which provides a reference for performance appraisal of manufacturing enterprise.
The Flow Stress Behavior and Constitutive Equation of Nanometric Al2O3 Particulate Reinforced Al Alloy Matrix Composites
Authors: Zhang Zhi Min , Yang Yong Biao , Zhang Xing
Published: December 2012

The flow stress behavior and constitutive equation of the nanometric Al2O3particulate reinforced Al alloy matrix composites were investigated in the temperature range from 590k-710k, and at the strain rates range from 0.01s-1-1s-1. Hot compression tests were carried out with thermal simulation machine Gleeble-1500. The results showed that the values of the true stresses rose rapidly and then held constant to some extent after attaining the peak values with the increasing strains at different deformation condition. The flow stress for the composites increased with increasing strain rate, which means that the experimental material is a sensitive material of positive strain rate, and decreased with decreasing temperature. Dynamic recovery and dynamic recrystallization occurred during hot compression of the composites. The constitutive equation represented by a Zener-Hollomon parameter in an exponent-type and the deformation activation energy are as follows respectively: σ=71.43ln{(Z/4.37×1011)1/5.94+[(Z/4.37×1011)2/5.94+1]1/2}, Q=197KJ mol-1.
Study on the Reliability Problem of MEMS Fuze Mechanism
Authors: Liu Jia Kai , Qi Xing Lin , Jia Jin , Fu Bo
Published: December 2012

MEMS technology has become the hotspot of fuze development currently, but the reliability problems seriously influence the application of MEMS in fuze. By way of analyzing the characteristic of MEMS fuze mechanism in aspects of process technics, material behavior, structure form and micro size effect, it shows that the reliability of MEMS mechanism is quite different from the traditional fuze. The environment stress in full life cycle of fuze and the main failure mode of MEMS mechanism under environment stress have been analyzed, and the interrelated matrix between environment stress and failure mode has been presented. Based on these investigation, the reliability testing method of MEMS fuze mechanism has been studied, which can provide guidance for the reliability testing of MEMS fuze mechanism.
Two-Component Injection Molding of Molded Interconnect Devices
Authors: Chen Jyun Yi , Young Wen Bin
Published: December 2012

Molded Interconnect Device (MID) can be defined as that an injection-molded plastic part combining with electrical and mechanical functions in a single device. This study is to examine the application of micro injection molding technology to the two-component molding process for the MID fabrication. The process involves the first shot of a plastic component with channel patterns on the surface. A second shot by micro injection molding technology is applied to fill the channel with the plateable plastics. The effects of the micro injection molding process parameters on filled line width of the two-component MID will be investigated. It is concluded that, for a MID component, the molding conditions must be designed carefully to keep the thickness variation below the allowable value. It is also found from the experiments that the thickness interference may in the range from 92 m to 196 m to have adequate molding at the second shot.
Dynamic Model for Product Innovation Alliance Oriented to Competitive Advantage
Authors: Yao Yi Yong , Zhao Li Ping
Published: December 2012

Technology innovation alliance strategic is a basic and a trend for product innovation in SMEs (small and medium-sized enterprises). Researching on cooperative dynamic mechanism, FGEM for product innovation alliance in SMEs is built based on entropy theory. To improve the product innovation ability and comprehensive entropy management level, a standardized evaluation index and evaluation system is proposed, and a product innovation alliance dynamic evaluation method is constructed to give a new way for sustainable development of enterprises and constant innovation and upgrading of products.
Research Status and Developing of Metal Injection Molding
Authors: He Yi Qiang , Qiao Bin , Yang Jian Ming , Feng Li Chao
Published: December 2012

Metal injection molding(MIM) is a high efficient and near net shape manufacturing technology, which is appropriate for parts of small size and complex shape. MIM provides a viable method to fabricate metal and metal matrix composites with discontinuous reinforcements, and micro metal injection molding (μMIM) is applied to manufacturing products at micro scale. The status of the research and development of MIM and μMIM are reviewed. Processes including mixing, injection molding and subsequent debinding and sintering are summarized. And technical characteristic, injection processing and application of μMIM are introduced. The disadvantages in mixing, injection molding and debinding processes limit MIM to fabricating components with small size, low precision and mechanical properties, and it is necessary to prevent the powder from reuniting and avoid any oxidation and impurity during μMIM process. Further investigations in these areas will give rise to being explored of full potential of MIM technology.
Microstructure of the Synthetic Cast Iron Carburized with Different Types of Carburizers
Authors: Janerka Krzysztof , Jezierski Jan , Bartocha Dariusz , Szajnar Jan
Published: December 2012

The cast iron melting process can be based on metallic charge with pig iron or on steel scrap exclusively (i.e. synthetic cast iron). The analysis of the synthetic cast iron microstructure was presented and compared to micros of the cast iron produced on the base of pig iron. The analysis consisted of size and shape of the graphite precipitations and the metal matrix structure, too. The results of examinations and calculations were presented in form of figures and graphite distribution histograms. Based on researches conducted the authors confirmed opinions of heredity of the alloys microstructure cited in the literature.
Polaronic Effects in Wurtzite InxGa1-xN/GaN Parabolic Quantum Well
Authors: Wu Ren Tu Ya , Feng Qi Zhao
Published: December 2012

The energy levels of polaron in a wurtzite InxGa1-xN/GaN parabolic quantum well are investigated by adopting a modified Lee-Low-Pines variational method. The ground state energy, the transition energy and the contributions of different branches of optical phonon modes to the ground state energy as functions of the well width are given. The effects of the anisotropy of optical phonon modes and the spatial dependence effective mass, dielectric constant, phonon frequency on energy levels are considered in calculation. In order to compare, the corresponding results in zinc-blende parabolic quantum well are given. The results indicate that the contributions of the electron-optical phonon interaction to ground state energy of polaron in InxGa1-xN/GaN is very large, and make the energy of polaron reduces. For a narrower quantum well，the contributions of half-space optical phonon modes is large , while for a wider one, the contributions of the confined optical phonon modes are larger. The ground state energy and the transition energy of polaron in wurtzite InxGa1-xN/GaN are smaller than that of zinc-blende InxGa1-xN/GaN, and the contributions of the electron-optical phonon interaction to ground state energy of polaron in wurtzite InxGa1-xN/GaN are greater than that of zinc-blende InxGa1-xN/GaN. The contributions of the electron-optical phonon interaction to ground state energy of polaron in wurtzite InxGa1-xN/GaN (about from 22 to 32 meV) are greater than that of GaAs/AlxGa1-xAs parabolic quantum well (about from 1.8 to 3.2 meV). Therefore, the electron-optical phonon interaction should be considered for studying electron state in InxGa1-xN/GaN parabolic quantum well.
A Finite Displacement Visco-Hypoelasticity Model
Authors: de Deus Hilbeth P. Azikri , Alves Marcelo K. , da Silva Claudio R. Avila
Published: December 2012

The objective of the work is to propose a dual visco-hypoelasticity model and a numerical procedure for the analysis of Polymeric materials subjected to large displacements and rotations. In the proposed dual approach, the Hencky’s logarithm strain measure is a function of the rotated Kirchhoff stress history in terms of a convolution equation. The material is assumed to be isotropic and the kernel functions, associated with the shear and bulk compliance moduli, are represented in Prony series. The problem is formulated within a Total Lagrangian framework and employs the Galerkin finite element method in the discretization process. Finally some numerical examples are presented in order to attest the proposed model and to verify the robustness and performance of the proposed numerical scheme.