bluuebunny/crossref_metadata_2025 huggingface dataset:
Translator Education and Metacognition
Authors: Echeverri Álvaro
Published: December 2014

Translator training has undergone major changes over the last two decades. One of those changes is a transition from training courses organized around a series of translation difficulties to a conception of training organized around a set of skills and competencies that have emerged as the product of interdisciplinary research on translation and educational science. Helping students to take better control of their own learning is an aspect that can be influenced by knowledge produced in educational research. Metacognition as knowledge produced in educational science can contribute to this transition. This chapter highlights the metacognitive dimension of translation and shows that metacognition can help translation students to become responsible for their own learning. Finally, the author presents the results of a study that allowed him to identify and define metacognitive factors that help learners succeed in their transition from university to the labor market. Some crucial aspects of training are overlooked when it focuses exclusively on disciplinary knowledge.
A Corpus-Based Comparison of Self-Reflection Modalities in Process-Oriented Translator Training
Authors: Angelone Erik
Published: December 2014

In recent years, process-oriented translator training has gained popularity among trainers and trainees alike, thanks to new, user-friendly pedagogical tools geared towards fostering cognizance of problems and problem-solving. This chapter reports on a corpus-based exploratory study that set out to document variation in student problem-solving discourse when utilizing Integrated Problem and Decision Reporting logs and screen recordings as self-reflection tools. Variation was observed between the two self-reflection modalities, particularly in the domains of the textual level and locus (comprehension, transfer, or production) of problem solving. The discourse generated by students when using screen recording for self-reflection is suggestive of a multi-layered, granular approach, which may, in part, shed light on why screen-recording analysis has proven to be particularly efficacious for the purposes of error detection and mitigation.
Cross-Fertilization of Training and Research in a Master's Program in Public Service Interpreting and Translation
Authors: Valero-Garcés Carmen
Published: December 2014

This chapter addresses the need to combine training, research, and practice to guarantee the existence of competent professionals in the field of Public Service Interpreting and Translating (PSIT) (also known as Community Interpreting and Translation [CIT]). These elements are integrated in the design of the Master's in Intercultural Communication, Public Service Interpreting and Translating (MICIT) at the University of Alcalá, Madrid, Spain. The program is based in the principle of cross-fertilization of these three main parameters: training, internship, and research. The focus of this chapter is to show the interrelation between these three elements, with special emphasis on the last element: research.
Telework
Authors: Blount Yvette
Published: December 2014

This chapter examines the technology, human resource management, and service quality issues that inhibit and/or support managers and employees in adopting sustainable telework programs using data from two Australian case studies. The Telework Conceptual Framework developed in this chapter provides guidance for government policymakers and managers in organisations (SMEs, not-for-profit, and large organisations) on the choice of technology, human resource management considerations, and service quality issues relating to the sustainable adoption of telework. A business case for telework should include the components of technology, human resource management, and service quality (customer service) that will contribute to an organisation's profitability. The contribution of telework to an organisation's competitiveness is an important prerequisite for management to embrace telework and other flexible work practices.
E-Government Service Research Development
Authors: Hasan M. Mahmudul
Published: December 2014

Electronic service in the domain of e-Government has been gaining research attention over past two decades. This paper reports on a literature review of the published e-Government service research and provides an analysis of the research development in terms of research themes, regional context, research perspective, data analysis method, and research approach. The results of this analysis can serve the e-Government research communities as a means of understanding the e-Government service research development and future research agenda. The finding of this paper shows that e-Government service research is conducted in the theme of adoption, evaluation, interoperability, etc. The research is conducted both in the context of economic developed and developing countries mainly in citizen perspective. Empirical data analysis method and descriptive approach are mostly employed in the research.
M-Government for Emergency Notifications
Authors: Joseph Rhoda C. , Lee Roderick L.
Published: December 2014

This study examines the use of mobile devices for the delivery of emergency notifications to end users from a mobile government (m-government) perspective. The study is informed by the task-technology fit model, technology acceptance models, and the literature on emergency management. Our findings indicate that the task, technology, behavioral, and to a lesser extent situational characteristics affect the use of m-government for the delivery of emergency notifications. Additional themes of equity and dependence emerge as relevant to user perceptions. This paper contributes to the m-government literature by examining and presenting findings relevant to emergency management and provides insights on the user perceptions of m-government for emergency notifications. This study also has implications for all levels of government including local, state, and federal. Lastly, as mobile technology use grows in the public domain this type of study advances the goal of using information and communications technologies (ICTs) to benefit human well-being.
Cloud Computing for Teaching Practice
Authors: Saadatdoost Robab , Sim Alex Tze Hiang , Jafarkarimi Hosein , Hee Jee Mei , Saadatdoost Leila
Published: December 2014

Recently researchers have shown an increased interest in cloud computing technology. It is becoming increasingly difficult to ignore cloud computing technology in education context. However rapid changes in information technology are having a serious effect on teaching framework designs. So far, however, there has been little discussion about cloud computing benefits in domains of teaching frameworks which propels us to study and redesign teaching frameworks considering cloud computing. The purpose of this paper is to review recent research into cloud computing and features which can be improved with this new technology. This paper studied several researches through literature to determine the main impact of cloud computing on “planning and preparation” and “instruction” domains as two main domains of teaching framework. Light will be then shed on the impact and potential benefits of cloud computing on teaching framework. The paper closes by proposing to design an evaluation table based on cloud computing artifacts to enhance teaching practice and highlights its offerings for educational institutions.
Study on Extraction of Xylan and in Wood Preservation
Authors: Wang Ju Wei
Published: December 2014

Xylan preservative is harmless to humans and animals, contaminate the environment of new wood preservatives.This paper from bagasse, rice husk, corncob, xylan extracted from birch, testing the corrosion resistance of these four preservatives and CCA compared with the results show that: white rot fungus specimen weight loss rates were: Bagasse xylan: 2.41%, rice husk xylan: 2.65%, corn cob xylan: 2.53%, birch xylan: 2.33%, CCA rate of 4.08% weight loss.
Synthesis and Characterization of Silica Coated Carbon Nanotubes-Alumina Composite Ceramics
Authors: Meng Sheng Hao , Yan Jun , Li Hong Guang , Du Shi Guo
Published: December 2014

Silica-coated carbon nanotubes compounds were synthesized through coating silica nanoparticles on the surface of carbon nanotubes, by peptization and reflux method with tetraethoxy silicone as a main material. Silica coated carbon nanotubes-alumina composite ceramics were synthesized by adding the SiO2/CNTs compounds to the alumina ceramic. The surface of composite ceramics were observed by scanning electron microscope (SEM), the coated nanotubes exhibit better dispersion in the alumina substrate over uncoated and play a role of bridging the alumina grains.
Selection and Analysis of Parameters for Composite Carbide End Mills
Authors: Mokritskii Boris Y. , Pustovalov Dmitriy A. , Stupin A. , Vereschaka Alexey Anatolevich , Serebrennikova A.G. , Altukhova Victorya V.
Published: December 2014

Carbide end mills are quite expensive tools. Reduction of cost of such end mills while maintaining their key performance characteristics is an important and long-running task. One way for solution of this problem is to develop a composite end mill, which tail part is made of structural material and working part of carbide. Versions for positioning and connecting tail and working parts may differ, and this will influence the performance characteristics and, accordingly, the scope of application of a particular version of end mill. This work was supported by grants No2014 / 68 (Project 254) and No9.251.2014 / K (Project Code 251), Ministry of Education of the Russian Federation.
Fabrication of Micro-Dimple Arrays Using Modified Through-Mask Electrochemical Micromachining
Authors: Hao Qiao Ling , Ming Ping Mei
Published: December 2014

It has been found that well-defined surface textures (such as micro-dimple arrays, micro groove arrays) can reduce friction, wear and improve heat transfer, fluid motion state effectively. To produce micro-dimple arrays on the metal surface with a high efficiency and low cost, this paper proposed a modified through-mask electrochemical micromachining method with flexible porous material filled in the interelectrode gap. The feasibility of the process and the most important process factor which affects the depth of the micro-dimple were investigated by orthogonal experiments. The results showed that micro-dimple arrays can be obtained efficiently using both direct current (DC) and pulsed current and the qualities of the micro-dimples generated by pulsed power were much better than those formed by DC. Electrolyte concentration was the most important factor that affected the depth of the micro-dimple in the selected process parameters.
Research on Virtual Grinding for Indexable Inserts
Authors: Wang Yuan Yuan , Zhao Jun , Li Fei
Published: December 2014

The cutting location of cutting-edge curves is obtained by the mathematic models of indexable inserts, and based on the softwares of UG and NCSIMUL, The virtual machining platform is realized to simulate the whole processing of grinding. The Entity modelings of indexable inserts are obtained by Boolean operation in virtual environment, and the basis is presented for analyzing accuracy of the mathematic models and the virtual machining platform. Testing efficiency of NC code and reliability of high speed grinding are improved. This method provides precise 3D models which can be used in the followed works such as finite analysis, CNC machining and so on.
Effect of Forming Parameters on Springback of Advanced High Strength Steel DP800
Authors: Minh Nguyen Quang
Published: December 2014

Springback is one of the main quality defects in the sheet forming. In this paper, numerical simulation is used to analyze the effects of blank holder force, friction coefficient, blank thickness, die corner radius and stroke on springback. The effect of blank holder force and blank thickness on springback is obvious. Springback decreases as the BHF and blank thickness increase. Increasing friction coefficient between tools and blank shows a good suppression effect on springback. Larger die corners increase the curvature of side wall and worsen the springback, but the springback of flange is reduced. The greater the stroke is, the larger the final springback will be.
Effect of Heat Treatment on Gradient Wetting of (Meth)Acrylate Copolymer Film Surfaces
Authors: Zhang Yong , Cheng Jiang
Published: December 2014

The effect of heat treatment on gradient wetting of (meth) acrylate polymer film surfaces was analyzed. Poly (methyl methacrylate – butyl acrylate) and poly (methyl methacrylate – butyl acrylate - 2-hydroxyethyl methacrylate) were prepared by the free radical solution polymerization and their coating film wettability was obtained by measuring water contact angles (CAs). The gradient wetting surface was fabricated by a simple controlled ester group hydrolysis process on (meth) acrylate polymer film. The gradient wetting properties were attributed to the gradient surface chemistry from the ester group to acid salt on copolymer film. The copolymer films of gradient wetting were heated at 100 °C. It is found that the gradient materials will exhibit the unique wetting with the heating time increasing and the heat-resistance property of gradient surface needs further research.
Experimental Investigation of Casting Shape Memory Polyurethane
Authors: Li Guang Ling , Zhou Hong Lei
Published: December 2014

It is feasible to polymerize SMPU from MDI, PBA, BDO and DMF. Each component has a good ductility, but there are insufficient in terms of strength, glass-point temperature, crack resistance and implosion tendencies. The formulation (PBA: BDO: MDI: DMF=1: 3: (3-4): (7-8)) is recommended. SMPU polymerized by this proportion has good comprehensive properties. The effect of the two-step prepolymerization method, especially the full polymerization method is satisfactory. The composite Materials obtained from powders and particles by hot press molding and that formed by cotton fabric have good ductility. Finally, some suggestions are proposed about implosion preventing, casting crack preventing and development technology.
Corrosion of High Zn Content Al-Zn-Mg-Cu Alloy in 3.5 wt.% NaCl Solution
Authors: Ran Fan Qing , Chen Zi Yong , Chai Li Hua
Published: December 2014

In this paper, the polished specimens of high Zn content Al-Zn-Mg-Cu alloy after various aging treatments were immersed in 3.5 wt.% NaCl for up to 240 mins. The development of corrosion was monitored using scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDX). There are two stages during the corrosion process, the first stage of attack started with localized corrosion of trenching around the Al-Zn-Mg-Cu particles. In the second stage the pitting corrosion appeared at the grain boundaries, and then developed into intergranular corrosion. This phenomenon is related to the potential difference between the matrix and the precipitates.
Comparative Study on Analytic Data Smoothing Method of High Speed Video
Authors: Zhou Ji He , Yang An
Published: December 2014

Commonly used video data smoothing methods in analytic system is interpolation and filtering. Images of sports biomechanics signal data is a quadratic function, such as projectile motion.In recent ten years, few scholars have conducted a comparative studyon the effect of different kinds of smoothing method on this type of signal data processing, we first list the mathematical principle of various kinds of interpolation method and filter method, with proper mathematical reasoning and combined with the literature to get the advantages and disadvantages of various methods and scope of application, and then validated with experimental method and draws the conclusion.
Difference of Mixing and Cocrystallization of TNT and CL-20 Studied by Molecular Dynamics Simulation
Authors: Chen Peng Yuan , Zhang Lin , Zhu Shun Guan , Cheng Guang Bin
Published: December 2014

For the purpose of studying the difference of mixing and cocrystallization of TNT(2,4,6-trinitrotoluene) and CL-20(2,4,6,8,10,12-hexanitrohexaazaisowurtzitane), molecular dynamics simulation(MD) was performed within Discover code. After the equilibrium of the system, the average bond length of trigger bond(Lave) is almost unchanged after mixing or cocrystallization. However, the largest bond length of trigger bond(Lmax) of CL-20 in cocrystal is shorter than that of it in pure CL-20, indicting the cocrystal is more difficult to be detonated than CL-20. The Lmax of TNT shows the same result. The cocrystal shows a larger cohesive energy density than composite ones, suggesting the cocrystal is more insensitive. Besides, trigger bond energy of cocrystal is larger than physical mixture of TNT and CL-20, suggesting the cocrystal is more insensitive. The mechanical properties show the cocrystal is more harder than pure TNT or CL-20, but has a weaker ductibility and tenacity.
Modal Analysis for Vertically Cutting the Motor Frame Based on ANSYS Software
Authors: Wang Xin Rong , Zhou Yan Yu , Zhao Ya Zhou , Wang Ping
Published: December 2014

The dynamic modeling method with finite element for the motor frame was introduced by using ANSYS software to analyze the frame modal. Natural frequency characteristics and the vibration modes of frame under the action of centrifugal force during vertical machining process were discussed, and effects on the result of modal analysis coming from rotating centrifugal force at different velocity were analyzed. These study results are helpful for guidance of the key process and equipment design for machining the motor frame.
Numerical Simulation and Production Trial of Aluminum Alloy Gear Box Housing
Authors: Ni Li Yong , Liu Peng
Published: December 2014

Die casting processing analysis was conducted and the gating system and the cooling system were designed for aluminum alloy gearbox housings. Numerical simulation software PROCAST was used to calculate the filling and solidification sequence and the temperature field of die castings. The reasonable designs of the gating system and the cooling system were obtained. The feasible die casting mould was designed and manufactured. Production trial showed that, casting molding effect is good, and there were not defects such as misrun, cold lap. After machining, there were not defects exceeding the allowed limited values including porosity, shrinkage, and slag inclusion in the products. The trial showed that the product mold design and die casting technology achieved the desired effect, which can realize batch production.
Suspension Force Control System Design and Simulation for Bearingless Brushless DC Motor
Authors: Liu Yi Chen , Zhu Huang Qiu , Zhu Li Dong
Published: December 2014

A bearingless brushless DC motor is a new type of high performance motor, which integrates the function of magnetic bearings into a brushless DC motor. In this paper, the suspension force control system is improved and optimization designed according to the radial suspension force mathematical model. The bearingless brushless DC motor control system model is established with the aid of Matlab/Simulink software. From the simulation results, it is confirmed that the rotor shaft is stably suspended without the mechanical contacts. The proposed suspension control system is found suitable to realize the stable suspension of the rotor in the bearingless brushless DC motor.
Axiomatic Design of Facility Layout for Reconfigurable Manufacturing System
Authors: Fan Shu Hai , Li Jin Hong , Jiang Zhi Bing , Zhang Zhi Gang
Published: December 2014

Based on the basic knowledge of reconfigurable manufacturing system and axiomatic design, this paper designed the reconfigurable manufacturing system through two axioms (independence axiom and information axiom) of axiomatic design. In the application of independence axiom, the general goal was decomposed into four levels and each decomposition was accomplished by four steps with their respective design equations. And then the corresponding functional structure table in summary is listed. While in the application of information axiom, the information content of system was calculated under the circumstances of uncoupled design and quasi-coupled design. Finally, the problems and their corresponding solutions of the two axioms of axiomatic design were put forward.
Crystal Structure and Antioxidant Activity of 6-Gingerol Oxime
Authors: Wang Na , Liu Si Yu , Huang Xue Song
Published: December 2014

Under the acidic condition, 6-gingerol (C17H26O4) reacted with hydroxylamine to generate 6-gingerol oxime (C17H27NO4). Single-crystal X-ray diffraction with CuKα radiation (λ = 1.54184 Å) revealed the crystal belongs to the orthorhombic system, the space ground is P212121 with a = 5.24240(10), b = 25.7792(4), c = 25.9824(5) Å, V = 3511.39(11) Å3, Z = 8, Mr = 309.40, Dc = 1.171mg/mm3, μ = 0.669mm-1, S = 1.035, F(000) = 1344.0, the final wR2 was 0.1132 (all data) and R1 was 0.0412 [I>2σ (I)]. Two molecules compose one monomeric unit in the crystal. And the hydrogen bonds construct the dimer and the integral crystal spacial structure. The antioxidant activity of the 6-gingerol oxime was tested by the scavenging effect on DPPH radical and potassium ferricyanide reducing power test while Vitamin C was regarded as the comparison. The IC50 of the oxime for the scavenging effect on DPPH was 0.0471 g/L which was less strong than Vitamin C. The reducing power of Vitamin C was about three times powerful than the 6-gingerol oxime.
Research on Operating System Security Technology
Authors: Zhao Ming Xin
Published: December 2014

This paper study three mainstream operating system,their kernel module on-demand loading mechanism, their safety and reliability measures, points out the weaknesses these operating systems have in the kernel module security control. Along with the study of two new operating system -- dynamic extensible operating system and virtual address space based on file operation system, make a prospects on the operating system architecture development
Study on Dynamic Characteristic in Hydraulic System Based on Bypass Method by the AMESim
Authors: Zhang Jun , Wu Yong , Tang Hong Mei , Tang Chun Ren , Li Xian Hua
Published: December 2014

s. At present, based on the bypass method to measurement the dynamic of the high pressure side flow in hydraulic system became more and more. In order to analysis the dynamic characteristics, the bypass method measurement system flow schematic was introduced in this paper, the dynamic flow of the main oil and the system was obtained by using dynamic flow of the side oil. Meanwhile, the dynamic pressure of the main oil was obtained by using dynamic pressure of the side oil. From the results of numerical analysis indicates that it is feasible to use the bypass method to get the characteristics of the dynamic flow and dynamic pressure in the system.
Properties of a Solid–Solid Phase Change Material PAN/SA-LA/ZMS
Authors: Guo Jing , You Xiang Kang , Zhang Li , Xiang Heng Xue , Zhang Sen , Liu Yuan Fa
Published: December 2014

In this study, novel solid–solid phase change materials (PCM) composed of polyacrylonitrile, binary of fatty acids ((blending of stearic acid (SA) and lauric acid (LA)) and zeolite molecular sieve (ZMS) were prepared by solution blending process. The structure and properties of the PCM were characterized using flourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), polarized optical microscopy (POM), differential scanning calorimetry (DSC) and thermogravimetric analysis (TG), respectively. DSC analysis indicated that the crystallization latent heat of the PCM was 125.22 J/g and its phase transition temperature was about 17 °C. The temperature curve for step cooling of the PCM showed that it’s holding time achieved 1 480 s, which explains that the PCM had excellent heat-insulating properties. Based on all results it can be concluded that the novel PCM can be considered as potential PCM for thermal energy storage.
The Research of Water Flooding Measures in Late High Water Cut Period of Secondary Reservoirs
Authors: Song Kao Ping , Wang Cheng Cheng , Fu Cheng , Wu Xiao Hui
Published: December 2014

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ilfield is in high water cut stage and always appears two phenomenon called "two speeds" and "two low". Based on the geological characteristics of the block, the current exploration wells arrangement and producing dynamics, two sets programs of water injection intensity and water injection timing were designed. Through the numerical simulation prediction of the two sets of 16 programs, the optimization results are 9 injection intensity and 93% of water cut. The cumulative oil producing capacity is 1402.41×104t and the cumulative increasing oil capacity is 6.26×104t and the increasing value of the recovery efficiency in Secondary oil layer is 1.33% when the water cut is 98%.
Real-Time Implementation in DSPACE of Rotor Magnetic Field Control of Bearingless Induction Motor
Authors: Zhang Qin , Sun Yu Xin , Zhu Huang Qiu , Liu Xian Xing
Published: December 2014

A bearingless induction motor is a strong coupled complex system, the decoupling control of torque and radial suspension force is the premise of the stable operation of the bearingless induction motor. In this paper, the principle of bearingless induction motor is expounded. The magnetic mathematical models of bearingless induction motor are created. The rotor field oriented control strategy is designed. The control strategy is validated with Matlab/simulink. Real-time simulation model based on dSPACE is given and the platform based on dSPACE is constructed. The results show that this method has good decoupling control performance. The actual system development and experiment process confirms that the dSPACE real-time simulation platform can shorten the development time and facilitate the development process, and save costs during the design and test period.
Research on the Development of Computer Architecture
Authors: Zhao Ming Xin
Published: December 2014

This paper is for the fact that some computer system structures impeding the current computer performance further improvement . Present the solution method and the development direction. CISC system and RISC system are introduced, together withVLIW system, Parallel architecture and multi-threading architecture and massively parallel processor systemMPPand group of machines parallel system. Analyze the structure of the computer system research challenges,Look to the future about the development direction of computer system structure.
A Three-Level DTC System Based on Virtual Space Vector Modulation for Bearingless Permanent Magnet Synchronous Motor
Authors: Sun Yu Xin , Xu Chang Sheng , Zhu Huang Qiu
Published: December 2014

In This paper, a direct torque control (DTC) method for bearingless permanent magnet synchronous motor (BPMSM) based on three-level neutral-point clamped (NPC) inverter is described. Through the analysis of virtual space vector modulation, an independent control strategy is adopted into the suspension winding control and a flux linkage error vector SVM-DTC method supplied by three-level NPC inverter is introduced into the torque windings control. By using the proposed control strategy, the neutral-point voltage variation can be greatly limited and the voltage shifting can be eliminated. The results of simulation verify the feasibility of the control algorithm, the dv/dt of output voltage and the torque ripple are restrained effectively, satisfactory robustness and the good performance of the radial levitation can be achieved in a wide speed range by using the proposed method.
A Study on the Aerodynamic Characteristics for a Two-Dimensional Trajectory Correction Fuze
Authors: Li Jie Min , He Guang Lin , Guo Hao Yang
Published: December 2014

This study researched the aerodynamic characteristics of a two-dimensional trajectory correction fuze used for the common artillery ammunition, which increases the targeting accuracy by decreasing the circular error probability. The correction fuze has a pair of fixed canard and a pair of steering canards for roll control and guidance. In this study, computational fluid dynamic (CFD) simulation is performed to study the aerodynamic characteristics of the trajectory correction fuze. The primary purpose of this performance was to predict the aerodynamic coefficients and flow field over a spin-stabilized projectile with the correction fuze. Calculation covered from-10 degrees to 10 degrees steering canards deflection over speed range from Mach 0.6 to 3. The results showed the variation law in the rotary moment of correction module and the control forces of the steering canards with the Mach varying, providing aerodynamic reference for the research of trajectory correction projectiles in the future.
Parameter Effects on Dynamic Crushing Behavior of Aluminum Staggered Kelvin Cellular Metal
Authors: Dang Xiao Bing , He Kai , Li Jiu Hua , Zuo Qi Yang , Du Ru Xu
Published: December 2014

This paper is aimed at investigating the parameter effects on dynamic crushing behavior of staggered Kelvin cellular metal using finite element method. The geometrical characteristics of the staggered cellular structure were analyzed and the finite element model was constructed using shell elements. A full factorial Design of Experiment simulation was carried out and four individual factors including two structure characteristics of the cellular metals and two mechanical parameters of the base material were selected, namely cell edge length, cell wall thickness, yield stress and tangent modulus. Their single and interaction effects on plateau stress, densification strain and densification strain energy were mainly researched. From the results it could be seen that the structure characteristics were a little more important than the base material properties for aluminum staggered Kelvin cellular metal.
Wind Turbine Gearbox Fault Diagnosis Based on Wavelet Theory and Hilbert Demodulation Spectrum
Authors: Wang Hui , Gao Gui Ge , Zeng Xian Wen
Published: December 2014

Through the mechanism of the gearbox’s vibration signal and establish the corresponding mathematical model, then establish a fault diagnosis method based on the wavelet theory and Hilbert demodulation spectrum. First, the wavelet threshold de-noising can be used to reducing noise of the gearbox’s vibration signal. Then, use the wavelet packet decomposition to decomposing the de-noising signal into different frequency band. After that, use the Hilbert transform to demodulate the frequency band that focused power. Finally, extract the fault characteristic value for the fault diagnosis. Through a fault simulation vibration signal test the method, the results show that the method can effectively extract the fault information of the wind turbine gearbox.
Kernel Independent Component Analysis and its Application in Blind Separation of Mechanical Faults
Authors: Ye Meng Di , Li Zhi Nong , Xiao Yao Xian , He Xu Ping , Yan Jing Wen
Published: December 2014

A nonlinear blind separation method of mechanical fault sources is proposed. In the proposed method, the signal is transformed from the low-dimensional nonlinear original space into a high-dimensional linear feature space by the kernel function, so that nonlinear mixture mechanical fault sources can be separated by the linear ICA method in a new feature space. The simulation result shows that the proposed method is superior to the traditional ICA method in processing nonlinear blind separation problem. Finally the proposed method is applied to the nonlinear blind separation of bearing faults. The experiment result further verifies the validity of the proposed method.
Study on the Effects of the Nonhomogeneous Material Properties on the Structure Strength of the Induction Quenched Crankshaft
Authors: Li Ji Shan , Liao Ri Dong , Chen Guo Hua
Published: December 2014

To study the effects of the nonhomogeneous material properties on the stress in an induction quenched crankshaft, the FEM model considering the nonhomogeneous material properties was established to simulate the stress in the crankshaft under the explosion pressure. Results showed that the nonhomogeneous properties almost didn’t vary the Mises stress distribution rule in the crankshaft. The maximum Mises stress, the ratio of the elastic modulus of the surface layer and the matrix followed a linear rule nearly. Moreover, the maximum Mises stress increased with the ratio. Besides, effect of elastic modulus distribution in the transition layer on the maximum stress could be ignored. To simplify the establishment of the FEM model, the elastic modulus could be set to either equal to the surface layer’s or the matrix’s.
Analysis of Development and Application of In-Wheel Motor System for Electric Vehicle
Authors: Yang Wei Hua , Fang Zi Fan , He Kong De
Published: December 2014

In-wheel motor driving electric vehicle is an important development direction in the future. Aiming at the in-wheel motor used for electric vehicle, a comprehensive analysis of its present design and application situation was made, then the performance characteristics of in-wheel motor driven electric vehicle was proposed. Moreover, the concept and structure of in-wheel motor system were stated, and the current development situation of its each part was expounded. Finally, on the basis of analysis of the positive and negative effects on the performance of electric vehicle, the key technical problems concerning in-wheel motor system design and the solutions were summed up.
Effect of Medium Viscosity on the Lift Performance of Full-Metal Single Screw Pump
Authors: Wu Jun Fei , Kan Jin Mei , Meng Fan Guo , Yu Ben Liang
Published: December 2014

To deal with the complicated spiral surface of screw pump,this article uses Pro/E to build geometry model.And it improves the method of the grid topology to use the dynamic grid ideas.At the same time,using the method of Computational Fluid Dynamics to numerical simulation for full-metal single screw pump,analysis and study that viscosity affect leakage properties,the torque of surface of rotor and the volumetric efficiency.
Parameter Design and Static Performance Analysis of a Novel Axial Magnetic Bearing for Maglev Wind Generators
Authors: Dong Jin Yue , Sun Yu Xin , Zhu Huang Qiu
Published: December 2014

As an important component of maglev wind generators, magnetic bearing should possess the merits of small volume, light weight, lower consumption and so on. A novel low-loss axial hybrid magnetic bearing (HMB) is proposed in this paper, its structure and operation principle are introduced, and the process of producing suspension force is elaborated. Based on equivalent magnetic circuit method, magnetic circuit models of PM and control coil are analyzed and established to deduce the quotation of axial levitation force. The accuracy and the reasonableness of proposed low-loss axial HMB are analyzed and validated by using finite element method (FEM), and the comparison between theoretical calculation and FEM is given, which indicates the proposed HMB exhibits good dynamic response and easy control.
Research on the Impacts of Screw Speed on All-Metal Screw Pump
Authors: Wu Jun Fei , Li Zhi , Meng Fan Guo , Yu Ben Liang
Published: December 2014

Compared with traditional screw pump,all-metal screw pump have more advantages in the oil extraction. In this paper, all-metal single screw pump's geometric model was made by PROE software; then the dynamic mesh technique was applied to mesh the model and constraint condition was applied in the ANSYS-FLUENT software. 3D flow field was numerical analyzed In that software, the impacts of screw speed on volume flow and volumetric efficiency were concluded, the conclusion can offer some valuable guidances to the all-metal single screw pump's design.
The Structure and Finite Element Analysis of a New Type of Maglev Wind Generator
Authors: Zeng Si , Sun Yu Xin , Du Yi , Zhu Huang Qiu , Liu Xian Xing
Published: December 2014

Abstract. In this paper, a new type of maglev wind generator is proposed. The working principle, structure characteristics and the finite element analysis of the new maglev wind turbine are introduced. The generator consists of a 2 degrees of freedom (DOF) maglev generator and a 3 DOF hybrid magnetic bearing. An eight poles active magnetic bearing with external rotor is added into traditional direct-drive permanent magnet wind generator. The rotor ring is hollowed, which can leads to the self-decoupling for magnetic fields between power generation system and suspension system. Compared with the conventional maglev wind generator, the proposed generator not only shows the same advantages of traditional maglev wind turbines, but also improves the axial length utilization and decrease the cost of motor control.
Influence of Bi3.15Nd0.85Ti3O12 Buffer Layer on Structure and Electrical Properties of Bi0.94Ce0.06Fe0.97Ti0.03O3 Thin Films
Authors: Zeng Jia , Tang Ming Hua , Tang Zhen Hua , Xiao Yong Guang , Peng Long , Zhou Yi Chun
Published: December 2014

Bi0.94Ce0.06Fe0.97Ti0.03O3 and Bi0.94Ce0.06Fe0.97Ti0.03O3/Bi3.15Nd0.85Ti3O12 double-layered thin films were fabricated via sol-gel process on Pt/Ti/SiO2/Si substrates. The influence of Bi3.15Nd0.85Ti3O12 buffer layer on microstructure and electrical properties of Bi0.94Ce0.06Fe0.97Ti0.03O3 thin films were investigated in detail. Well-saturated P-E hysteresis loops can be obtained in Bi0.94Ce0.06Fe0.97Ti0.03O3 films with Bi3.15Nd0.85Ti3O12 buffer. The remnant polarization (2Pr) of the double-layered thin films is 112 μC/cm2. The coercive field (2Ec) of double-layered films is 672 kV/cm, which is much lower than that of the Bi0.94Ce0.06Fe0.97Ti0.03O3 thin films. The leakage current density of Bi0.94Ce0.06Fe0.97Ti0.03O3/Bi3.15Nd0.85Ti3O12 double-layered thin films is 4.12×10-5 A/cm2.
Influence of MnCO3 Addition on the Grain Refinement of AZ91 Magnesium Alloy
Authors: Liu Xiao Ying , Geng Hao Ran , Zuo Min , Ji Peng Fei
Published: December 2014

This article reports the effect of MnCO3addition on the grain refinement efficiency of AZ91 magnesium alloy. The results indicate that the addition of MnCO3has excellent grain refining efficiency for AZ91 alloy, which is mainly attributed to the Al4C3particles formed in the melt, besides Mn is indispensable to grain refinement in Al-bearing magnesium alloys. There is an optimal addition amount of 0.6% at 740 °C and the grain size is reduced from 245 to 91 μm. At the same time, the corrosion resistance performance of MnCO3-added AZ91is improved.
Influence on the LED Luminous Efficiency from COB Packaging with Different Chip Arrangement
Authors: Guo Mian Mian , Wan Qi Xin , Kuang Hai , Xiong Zhi Hua
Published: December 2014

In this work, the influence on the luminous efficiency of sapphire-based LED with different chip arrangement was studied. Three types of ten-chips LED with COB packaging including the circular, triangular and rectangular structures COB were fabricated respectively. It is indicated that the COB packaging with rectangular arrangement has the best luminous efficiency in three types of COB packaging structures. In conclusion, a better COB packaging way was developed.
Optimization of Poly(phenylene sulfoxide ether sulfide ether) Synthesis by Response Surface Methodology
Authors: Gu Ai Qun , Li Zuo Cai , Liu Shu Ling , Fu Cong Li , Yu Zi Li
Published: December 2014

To increase the molecular weight of poly (phenylene sulfide ether) (PPSE), a novel route has been developed via the reduction of poly (phenylene sulfoxide ether sulfide ether) (PPSOESE) precursor. The synthesis of high molecular weight PPSOESE is essential for the ultimate purpose. Effects of process parameters on preparation of PPSOESE were firstly investigated and the optimization was performed by response surface methodology (RSM). Average number molecular weight (Mn) and Yield of PPSOESE were defined as the experimental responses. The statistical analyses indicate that the most significant factor is monomer concentration, followed by reaction temperature and the interaction of reaction temperature • monomer concentration. Under optimal conditions, the and Yield responses were obtained as 1.78 ×104±1.02 % and 93.6±1.3 %, which are in agreement with the predicted values of 1.80 ×104and 95.4 %, respectively. Structure of PPSOESE was also characterized. The highest intrinsic viscosity and yield of PPSE by the reduction of PPSOESE reached to 0.78 dL/g and 93.2%, respectively, much greater than the reported results. The work is helpful for forthcoming preparation and study of high molecular weight PPSE.
Photocatalysis Activity of TiO2-Based/Dendrimer Phthalocyanine Nanocomposite Photocatalyst
Authors: Xiao Shu Rong , Huang Bao Quan , Chen Qing Hua , Xue Hun , Qian Qing Rong , Xiao Li Ren , Liu Xin Ping , Xu Jing
Published: December 2014

The photocatalytic activity of polycrystalline TiO2samples impregnated with dendritic zinc phthalocaynine was investigated using the rhodamine B (RhB) aqueous solution as a probe. The morphology and structure of TiO2/dendrimer phthalocyanine nanocomposite catalyst were characterized by X-ray diffraction (XRD) and UV-Vis spectra. Significant activity improvements of the TiO2/dendrimer phthalocyanine nanocomposite photocatalyst were observed possible in terms of lower loading amount, enhanced photo-reactivity under light irradiation, as well as chemical, and photochemical stability of the sensitizers.
Slowing down for Ion Penetration through Plasmas
Authors: Wang Gui Qiu , Liu Si Yuan , Wang Yao Chuan
Published: December 2014

Slowing down processes for a proton and a carbon ion penetration through plasmas are studied within the dielectric response theory.The results show that the stopping power of ion will increase in lower projectile velocity, while the value of stopping power will decrease for higer velocity, and there is a maximum value for stopping power for some projectile velocity due to the resonace of excitation of plasmas. In addition, the stopping power will have higher value for carbon ion than proton due to the effects of charge states. Introduction
Effective Response Modifications of Non-Proportionally Damped Resonating Structures
Authors: Peters Hugo J. , Tiso Paolo , Goosen Johannes F.L. , van Keulen Fred
Published: December 2014

The structural resonance properties of damped structures can be exploited to obtain a required dynamic response with relatively low input power requirements. Practical applications often demand temporary modifications of this response. This paper presents a systematic approach to modify the response of harmonically driven, non-proportionally damped resonating structures using local structural property changes and excitation adjustments. The complex response is written in polar form (i.e., modulus and argument) to enhance insights. Sensitivity analysis is used to approximate the influence of the control variables on the response. A projection is proposed to determine the locations at which a specific structural change scores maximum effect to reach the desired response modifications. The introduced response normalization separates amplitude and shape modifications in a clear way. This work shows response modifications of non-proportionally damped resonating structures due to control variables in an intuitive manner.
Demonstrate for Rotating C-Shape Magnetic Refrigeration near Room Temperature
Authors: Alahmer Ali
Published: December 2014

Magnetic refrigeration is a new promised technology based on a distinctive property magnetocaloric effect (MCE) of some materials such as gadolinium. This manuscript demonstrates a rotating C-shape magnetic refrigeration using finite element magnetic method (FEMM). The proposed configuration can be produced a mean flux density about 0.6 T in the high flux region and a value of 0.02 T in the low flux density when the magnetocaloric material was magnetized and demagnetized respectively. Also a C-shape rotating magnetic refrigeration model was successfully built and tested in Tafila Technical University at mechanical engineering laboratories. A 3 °C of temperature difference between a hot and cold end of heat exchangers was achieved.
2D Phase-Field Simulation of the Directional Solidification Process
Authors: Ferreira Alexandre Furtado , de Castro José Adilson , Ferreira Ivaldo Leão
Published: December 2014

The microstructure evolution during the directional solidification of Al-Cu alloy is simulated using a phase field model. The transformation from liquid to solid phase is a non-equilibrium process with three regions (liquid, solid and interface) involved. Phase field model is defined for each of the three regions. The evolution of each phase is calculated by a set of phase field equations, whereas the solute in those regions is calculated by a concentration equation. In this work, the phase field model which is generally valid for most kinds of transitions between phases, it is applied to the directional solidification problem. Numerical results for the morphological evolution of columnar dendrite in Al-Cu alloy are in agreement with experimental observations found in the literature. The growth velocity of the dendrite tip and the concentration profile in the solid, interface and liquid region were calculated.
The Application Research of HVDC & FACTS to Suppress the Power System Low-Frequency Oscillation
Authors: Wang Min , Gu Dan Zhen
Published: December 2014

With the widely application use of UHV（ultra- high- voltage） transmission，increased the system low frequency oscillations，and flexible application of high-voltage direct current transmission (HVDC) and flexible ac transmission system (FACTS) can improve the system damping oscillation inhibition. This paper Based on the research results in recent years, classify& summarize HVDC and FACTS devices the theoretical basis and the main application places, and according to the way of access system of parallel, series and parallel hybrid FACTS devices stable controller design and optimization are summarized and classified.
Technical Economic Analysis of a Low Power Hybrid Wind-Solar System Grid Connected
Authors: Sócola Jorge Serván , Aldana Daniel Marcelo
Published: December 2014

The main aim of this work is to develop a methodology that allows performing an economic technical analysis of an energy generation system in base to renewable sources, with the capacity to feed to an average residential house connected to the electrical grid. As a first step should be to determine the energy demand for a residential user of the study area. Later, it performs an analysis in steady state of the energetic resources, in order to evaluate the energetic potential and right-sizing system available for energy demand estimated. Once dimensioned, the system proceeds to select the main components that conform it, makes the calculations for the dimensioning of the electrical system, and selects the type of structures of support as well as the location with a better provision inside the location area. Following each step of this methodology, it has been selected like a better alternative: a wind turbine of 2 kW and four photovoltaic panels of 240 Wp like main energetic sources of the hybrid, which will produce a total of 4055.24 kWh yearly, covering the annual demand with an surplus energy of 609.64 kWh a year and to a cost of 0.361 $/kWh, which is higher than the average cost of the electrical energy inside the residential areas. What concludes by the economic-financial analysis, the need of a co-financing and a policy of incentives from the government that benefits to the small auto-producers to use renewable energy sources.
Design of an Economical Compact Coaxial Cavity Combline Filter for 3G TD Base Station
Authors: Zheng Guang Ming
Published: December 2014

The cross coupled microwave filter is widely used in the communication sub system .The synthesis of the cross coupled filter is from prescribed transmission zeros and return loss till the attainment of the coupling matrix of each cavity. A compact narrowband combline high rejection filter with cross coupled is presented. A configureiton using identical resonator post with capacitance-loading is introduced. Tested results show that with order-8 filter center frequency at 2017.5MHz, return loss lower than-25dB can be achieved over a relative bandwidth of 1.29%. A sample filter has been fabricated and tested result confirmed the theory result.