bluuebunny/crossref_metadata_2025 huggingface dataset:
Research and Build a Test Platform for EPON OLT Software
Authors: Yu Qiang , Zhang Gang , Yu Peng Fei , Huang Hui , Chen Wei
Published: September 2014

For software function verification and performance testing, a test platform was built during the development of large-capacity EPON OLT equipment. The platform was based on distributed system,which using modified TCP/UDP to establish RPC data exchange path between nodes. With Linux as unified operating system, software work in both embedded PowerPC and x86-based PC virtual machines without modification. At last, a group of stress test was executed on the platform and the result was discussed.
An Empirical Study on Post-Adoption Behavior of Information Technologies for Health Care Management: A View of Big Five Personality
Authors: Lu Wen Xing , Wu Yu Yong , Liang Chang Yong , Gu Zuo Zuo , Zhao Yu , Wang Rui Ling , Gu Dong Xiao
Published: September 2014

Nowadays, health care management is driven by informationization and information technologies are widely used in various types of hospitals. Doctors and nurses are the direct users of information technologies for health care management (ITHCM), as well as the most critical prerequisites in ITHCM implementation. Their acceptance and use of ITHCM can significantly promote hospital performance and enhance core competitiveness. However, different people have different attitude, values and motivation on ITHCM. These factors not only affect employee’s behavior in ITHCM adoption, but also their continued use behavior of ITHCM. Based on the Big Five personality as well as real-world healthcare situation in China, we investigated the impacting factors of ITHCM continuing use, and built ITHCM Continuing Use Model based on personality. We conducted an empirical study to verify the related hypothesis. The results show that Big Five personality affect the willingness of ITHCM continuing use through perceived ease of use and perceived usefulness.
On the Construction of the Service Platform of the Mobile Library - Taking SUAA as a Research Model
Authors: Han Xue
Published: September 2014

Based on field researches,this paper is to propose a practical functional program adapted to today’s mobile library, and then try to implement the program by setting up a serial of correspondingly effective function modules for each of the service platforms of the mobile library of Shenyang University of Aeronautics and Astronautics (SUAA).
Personalized Customization on Science and Technology Intelligence
Authors: Fei Fei , Zhu Quan Yin , Xu Cheng Jie , Zhou Lei , Li Xiang
Published: September 2014

In order to suite customized demand of enterprises on scientific and technological information, a Web-based Front Platform Management System of Scientific and Technological Information is designed and realized. Customizable front platform page adopts HTML5+CSS3+jQuery to realize dynamic customization of display mode and contents, meeting the diversified demand of different users. Upon design and improvement, the system interface basically realizes customized operation on scientific and technological information, providing a front platform interface of good user-experience for the customized platform of scientific and technological information for enterprises.
The New Trend of Knowledge Service Crowdsourcing Model Based on the University Library
Authors: Li Ruo
Published: September 2014

This paper taking commercial crowdsourcing mode of economic operation in the the library knowledge consulting services introduces the crowdsourcing concept, features, successful business case and the crowdsoucing applications in foreign library and the predicament the knowledge consulting services faces and the contents, processes and management of the crowdsourcing mode knowledge consulting services.
Unsupervised Sentiment Orientation Analysis on Micro-Blog Based on Dependency Parsing and Hierarchical Dirichlet Processes
Authors: Tang Yong Wang , Wang Bo , Tang Hao Hao , Xi Yao Yi
Published: September 2014

Supervised methods of sentiment orientation analysis have got more and more attention for which don’t require labeled corpus and can be applied to different domains. However, traditional methods mostly consider single words which ignore the dependencies between the words of each other. To solve the problem, this paper presents an unsupervised method for sentiment orientation analysis on micro-blog based on dependency parsing and HDP model. Firstly, this method uses dependency parsing to filter the words in the corpus. Secondly, the HDP model is used to mine the implicit topics in the document. Then, a sentiment dictionary is used to calculate the sentiment distributions of the topics. Finally, the sentiment orientation of the whole micro-blog is obtained on the basis of the sentiment distributions of the topics. The experimental results show that the proposed method can effectively identify the sentiment orientation of micro-blog.
eBooks Research: Literature Review on Trends and Contributions, 1998 to January 2014
Authors: Yu Kuo Ting , Lu Hsi Peng , Luor Tain Yi , Ren Zhe Li
Published: September 2014

Purpose: This paper systematically consolidates and analyzes all literature on eBooks published between 1998 and January 2014 in an effort to inform academics and practitioners on the future research and development direction of this product.
Failure Logic Modeling Techniques Based on DEVS
Authors: Sun Qiang , Jiao Jian , Zhou Shan Shan
Published: September 2014

To identify the component failure propagation path in complex systems, a component failure logical model based on DEVS was established by combining the failure logic principle and DEVS formal specification at the next granularity level of component hierarchy. A series of components failure states define a potential hazard. DEVS has modeling advantages of standardized, hierarchical and modular. Basing on its own characteristics,it can be used to study failure logic modeling techniques of complex systems, model and analyse the scene of the accident process. Therefore, the paper describes syntax and semantics of component failure logic and atomic DEVS, focusing on the implementation mechanism of failure logic using DEVS, the establishment of component state space, the trigger mechanism and the corresponding output in order to establish a component failure logical model based on DEVS. At last, a Wheel Brake System is used to verify the applicability and validity of the model.
Estimation Methods of a Joint Model Based on Proportional Intensity Function and Proportional Hazard Function
Authors: Liu Huan Bin , Yin Tong , Rao Cong Jun
Published: September 2014

Recurrent events data refers to the observation of individuals, which contains the recurrent event time of interest. This paper mainly discusses a joint model when the end time is a multiplicable hazard function and the recurrent event process is a multiplicable intensity function. Based on the likelihood method, Delta method, U-statistic method and the idea of general estimation equation, the estimation of unknown parameters and unknown functions in the model is provided. It provides a new method of parameter estimation for the statistic analysis of recurrent events data.
The Design for Zero Emission Greenhouse System
Authors: Zhang Shao Jie , Li Bing , Liu Sheng
Published: September 2014

Currently, in alpine region, the main way of heating for the greenhouse is coal heating in winter. This heating method has many drawbacks. During the winter heating period greenhouse will consume large amounts of coal and produce large amounts of pollution. In addition, coal heating also relates to the issue of fire safety, there is security risk. Therefore, using new energy for heating to instead of coal fire heating has a very important significance. Wind and solar energy have the great application prospects and both of them are new clean energy resources which the technology is more mature. In this paper, the design of the greenhouse system use renewable and clean energy as the primary energy supply. The design uses “wind and solar hybrid system” to provide energy for the greenhouse. The system takes efficient energy storage and conversion device for heating the air and soil in the greenhouse, system can meet its own needs and ensure the temperature is appropriate for growth of plants in the greenhouse. Besides, the system can run without other energy supplement in the whole operation cycle. At the same time, this greenhouse system does not produce any harmful pollutants, so that it achieves the full-year zero-emission operation.
The Influence Analysis of Rectifier Side Control Mode on Commutation Failure in UHVDC
Authors: Rong Jun Xiang , Yang Ju Rui
Published: September 2014

This paper studies the influence of different control modes in the rectifier side (constant current control, constant power control) on commutation failure in UHVDC transmission system. The study is based on Yunnan-Guangdong ±800kV UHVDC transmission system and simulated in PSCAD/EMTDC. A wealth of simulation results indicate that the control ability of the constant current control on commutation failure caused by the critical voltage ratio of inverter transformer increased is worse than the constant power control; the control ability of the constant current control on commutation failure caused by three-phase grounding fault happens at inverter side AC bus is worse than the constant power control; The control ability of the constant current control on commutation failure caused by phase to phase short circuit fault or single-phase ground fault happens at inverter side AC bus is worse than the constant power control.
Study of Fault Location Algorithm Based on Fault Analysis Method
Authors: Li Lu Yi , Li Rong
Published: September 2014

Analyze and derive the relationship of each electrical quantity of the single-end fault location algorithm and present a fault location formula of two-end fault location algorithm. Through the simulation research of MATLAB/Simulink, when the fault occurs near in either end of the line, the ranging device near the fault point is adopted, fault distance can be measured with single-ended electrical quantities algorithm, when the fault occurred in near the midpoint of the line, two-end fault location algorithm is chosen to ensure the results’ accuracy higher.
Operation Optimization Approaches of Thermal Power Units with Big Data-Driven Hybrid Modeling
Authors: Wang Ning Ling , Zhang Yong , Zhu Long Fei , Yang Zhi Ping
Published: September 2014

An accurate and reliable energy-consumption model is the key to operation optimization and energy-saving diagnosis of thermal power units especially under different operation conditions and boundaries. Conventional mathematical and data-driven modeling methods were overviewed and compared in this paper. A hybrid modeling based on thermodynamic theory and fuzzy rough set (FRS) method was proposed to process the great volume of operation data and describe the energy-consumption behavior of thermal power units. On this basis, the operation optimization was performed with intelligent computation methods to derive the realizable benchmark state with the whole set of operation parameters. The resultant optimum operation state reflects the exterior factors and system behavior, taking practical guidelines for the modeling and optimization of large thermal power units.
Design of English Pronunciation Training System for Android
Authors: Liu Xiao Yun , Shen Jian
Published: September 2014

This paper is devoted to an English Pronunciation training system on the Android platform with functions like English transcription, word pronunciation demonstration, listening and repeating, pronunciation comparison, grading, pronunciation feedback and correction. The training system is designed and developed in line with the characteristics of Android operation system, giving full play to the advantages of Android platform by calling the relevant functions of function interface and components to improve the development efficiency of the system. The system is of high real-time and reliability with a series of multimedia techniques like the pronunciation mouth video-based animation, internal mouth structure figure, pronunciation guidance of mouth and tongue positions, and can effectively guide the learners to learn and practice English pronunciation.
Image Reconstruction Based on Compressive Sensing via CoSaMP
Authors: Zhang Lin
Published: September 2014

Compressive Sampling Matching Pursuit (CoSaMP) is a new iterative recovery algorithm which has splendid theoretical guarantees for convergence and delivers the same guarantees as the best optimization-based approaches. In this paper, we propose a new signal recovery framework which combines CoSaMP and Curvelet transform for better performance. In classic CoSaMP, the number of iterations is fixed. We discuss a new stopping rule to halting the algorithm in this paper. In addition, the choice of several adjustable parameters in algorithm such as the number of measurements and the sparse level of the signal also will impact the performance. So we gain above parameters via a large number of experiments. According to experiments, we determine an optimum value for the parameters to use in this application. The experiments show that the new method not only has better recovery quality and higher PSNRs, but also can achieve optimization steadily and effectively.
An Improved Online De-Noising Method for Ultrasonic Echo Signal of Wear Debris in Oil
Authors: Li Yi Ning , Zhang Pei Lin , Xu Chao , Zhang Yun Qiang , Li Long Yun
Published: September 2014

The ultrasonic echo signal of wear debris is influenced by many matters. It causes so much more noise. Therefore, it puts forward an improved online de-noising method for ultrasonic echo signal of wear debris in oil. In the dual-tree complex wavelet transform (DTCWT) field, a method, which combines the new non-linear threshold function with adaptive threshold, utilizes particle swarm optimization (PSO) for optimizing the parameter of non-linear threshold function to get the optimal solution. The result of de-noising method can be evaluated. Experimental results show that the proposed method has obvious effect on signal de-noising.
A Limbus-Based Approach for Eye Gaze Trackers
Authors: Chiang Chih Yuan , Christanto Ricky , Miaou Shaou Gang , Chen Ying Kang
Published: September 2014

Eye gaze trackers have numerous applications in medicine, gaming, advertising, teaching and learning, intelligent transportation, etc. In this paper, we proposed a novel approach for video based eye gaze trackers. In this approach, we apply the circumcircle of triangle principle to the limbus part of human eyes. First, an image pre-processing step is used to find three triangle vertices located on limbus. Then, we use the coordinates of these points to determine the limbus center using the circumcircle of triangle principle. Furthermore, when the proposed system fails to find the three useful points on limbus of one eye, a mirror procedure is adopted to find its limbus center based on the information extracted from the other eye. The proposed method can solve the occlusion problem caused by the eyelids that cover part of limbus. The experimental results show that the average eye detection rate is 98.39% and the average error between estimated and actual centers of limbus is only 1.99 pixels. The proposed method is simple, fast, and effective.
Ordinary Differential Equation Model and its Application in the Prediction Control of Population
Authors: Huang Xiao Min
Published: September 2014

Ordinary differential equation is an important branch of modern mathematics, and is a powerful tool to study the function change rules. Nowadays, the ordinary differential equation models have been widely used in various fields such as science, technology, engineering, economics, ecology, environment, population and transportation. In this paper, we study two kinds of ordinary differential equation models, i.e., Malthus model and Logistic model, and discuss their applications in the prediction control of population. We also use the population prediction of Huanggang City as an application example, and get satisfactory prediction results.
The Influence of Network Bottleneck on Train Energy Consumption in Railway Traffic
Authors: Fan Hong Qiang , Li Ke Ping , Jia Bin
Published: September 2014

In this paper, an improved cellular automaton model is proposed to simulate train movement by considering reaction time and coasting strategy. Our study is focused on the factors which influence the train energy consumption around network bottleneck (i.e. stations). Here the laws of the propagation of train delay are also discussed. The simulation results demonstrate that the proposed model is suitable for simulating the train movement under high speed condition.
Research on Novel Structure of Filter Banks Multicarrier Array Pattern Synthesis System
Authors: Liu Ying , Zhang You Run
Published: September 2014

This paper discusses the wideband array pattern synthesis based on filter banks, and the system output error is considered form time to frequency adaptive pattern synthesis. The novel structure is suitable to be used for the interference suppression in the downlink filter banks multicarrier system.
Study on Asymptotic Properties of a Joint Model
Authors: Liu Huan Bin , Yin Tong , Rao Cong Jun
Published: September 2014

With the development of biology, medical statistics and economy, the study of recurrent event data has made great progress. Many important statistical models of failed time and recurrence process are established. In this paper, we study a joint model based on multiplicable hazard function and proportional hazard function. Considering that the covariate is time-independent, and censoring is dependent on recurrent event processes and end times, we prove the consistency and asymptotic properties of the estimation under certain regularity conditions for this model.
Study on the Asymptotic Properties of a Composite Model in Statistical Analysis of Recurrent Event
Authors: Liu Huan Bin , Yin Tong , Wang Cheng
Published: September 2014

Recurrent events data refers to the observation of individuals, which contains the recurrent event time of interest. In this paper, we focus on the statistical analysis of recurrent event, and present a composite model based on the proportional intensity function and additive hazard function, and then prove the consistency and asymptotic properties of the estimation under certain regularity conditions.
Design and Implementation of Multi-Frequency Digital Receiver Based on FPGA
Authors: Liu Yu Peng , Du Chao , Liu Dong Lin
Published: September 2014

Recently, the concept of software radar has been proposed. The wide application of the digital technology has become a trend. With the development of modern radar system, the system requires higher and higher performance to the radar receiver. The technology of digital receiver has become an effective implementation method for high-accuracy and wide-band radar receiving systems. However, most of the digital receiver can only receive one wide-band signal with one center frequency. A multi-frequency digital receiver which can receive several center frequencies of signal simultaneously [1] is discussed in this paper. We also describe the theory and the design about digital receiver, introduce digital downconversion (DDC), FIR and decimation, digital beam forming and channel calibration. Based on the research, a realization of multi-frequency digital receiver based on FPGA is put forward. The analysis and simulation is made and the result shows the design of great performance.
Research on the Knowledge Character and Classification of Intangible Cultural Heritage
Authors: Dai Min Li , Sun Chuan Ming , Wang Min
Published: September 2014

As the knowledge of intangible cultural heritage is the experience which is accumulated for a long time, it is difficult to express the complex relationships completely. In order to preserve the content of intangible cultural heritage effectively, the knowledge should be classified by a rational standard. Firstly, this paper discussed the special character and information processing technology of intangible culture heritage; Secondly, the classification of intangible cultural heritage is designed based on its character and the theory of knowledge classification, and then a knowledge modeling framework for intangible cultural heritage is designed based on this classification. Application has proved that it is feasible and effective, and could help the users to master the knowledge and its relationship from various perspectives.
Enzymatic Degradation of Epoxy Resins: An Approach for the Recycling of Carbon Fiber Reinforced Polymers
Authors: Moeser Katrin
Published: September 2014

Carbon fiber reinforced polymers (CFRPs), particularly epoxy resins, are increasingly applied in innovative products nowadays. At the end of the life cycle of those products, CFRP waste has to be disposed in an ecological way. As of today, no energy effective recycling method is available to recover the valuable carbon fibers in a good quality. The presented study aims to exploit the ability of biological systems in order to efficiently and specifically degrade the polymer and release carbon fibers with minimal material strain. In a first approach environmental microorganisms for degrading the polymer component of epoxy composites into small fragments have to be identified. An analytical method will be developed to identify and quantify the polymer degradation. In a following step, the enzymes that are produced by the microorganisms and are essential for the polymer degradation will be identified, cloned, produced in a high amount and characterized in CFRP recycling studies.
Interaction of Load and Residual Stresses in Sintered 1.3344 High Speed Steel
Authors: Denkena Berend , Grove Thilo , Lucas Henning
Published: September 2014

Compressive residual stresses enhance cold forging tool lifetime. These stresses can be induced during the grinding process of the tool manufacturing. To use residual stresses induced by grinding it must be understood how load and residual stresses interact in ground and unground sub-surface zones. This has been studied with specimen from powder metallurgically produced 1.3344 high-speed steel. Residual stresses in the specimen where measured through x-ray diffraction in ground and unground conditions and under various applied load stresses. Residual stresses and load stresses sum up directly proportional at lower stresses, while at higher stresses a saturated stress state is achieved and the whole material deforms plastically.
Micromachining of Silicon - Study on the Material Removal Mechanism
Authors: Carrella Marina , Aurich Jan C.
Published: September 2014

The growing demand for micro products of hard and brittle materials requires suitable manufacturing processes, which serve high structure quality and accuracy. Therefore, micro pencil grinding tools are used. While grinding hard and brittle materials the structure quality and accuracy depends on the material removal mechanism. This mechanism is a complex interaction between the process parameters, the material response and the tool geometry. In this paper the influence of the process parameters, particularly the cutting speed and the feed rate, on the material removal mechanism are discussed. Furthermore, a method for the analysis of the structure quality and accuracy and within the material removal mechanism is shown.
Smart FE-Based Tool Design in Cold Forging
Authors: Andreas Kolja , Kiener Christoph , Engel Ulf , Merklein Marion
Published: September 2014

In cold forging, the forming tool takes a key role as it determines accuracy and efficiency of forming process. The present study focuses on the FE based analysis of the influence of die material, interference within prestressing and die splitting on the stress state in and the elastic behaviour of the forming tool. The results reveal a great influence of the workpiece material and the tool layout on the outcome of the forming process and the corresponding tool stresses.
An Ultrasonic Non-Contact Handling Device from Quartz Glass for Middle and High Temperature Applications
Authors: Locmelis Edgars
Published: September 2014

Ultrasonic non-contact handling is used to manipulate surface sensitive and fragile workpieces, e.g. wafers and glass plates, without mechanical contact. While the technology is available forapplications at room temperature, some of the manufacturing processes of products mentioned aboverequire handling at elevated temperatures. To enable this technology for handling in thermal processesan ultrasonic system for increased working temperatures is required. In order to adapt the ultrasonicsystem to the limited working temperature of the actuator, the handling system has to be operated attwo different temperatures. Due to the small change of the Young's modulus over temperature, quartzglass was chosen as material for the components in the high temperature region. The paper presentsthe design and manufacturing of a novel ultrasonic system operated at 790 °C while the actuator iskept at room temperature.
Wear Analysis of Tool Surfaces Structured by Machine Hammer Peening for Foil-Free Forming of Stainless Steel
Authors: Klocke Fritz , Trauth Daniel , Terhorst Michael , Mattfeld Patrick
Published: September 2014

Increasing demands concerning the performance of tribological systems for metal forming due to ecological restrictions or technologically increased process loads require the development of innovative tribological systems, especially in forming of stainless steel. It could be shown in preliminary work that surface structures on deep drawing tools manufactured by the incremental forming process machine hammer peening have the potential to reduce friction in strip drawing test by about 58 % in comparison with a ground reference surface. This is explained by the effect of lubricant pockets and a reduced true contact area in the interacting zone. However, due to the effect of a reduced contact area, the wear resistance of these surface structures is of main concern for the effectiveness of their application in deep drawing. Therefore, in this work strip drawing tests are performed over a minimum of 500 repetitions for the evaluation of friction characteristics. Additionally, the coating of the surface structures is investigated to improve the wear resistance of the structures.
Adaptive Friction Bearing for Reduction of Stick-Slip Effects
Authors: Engel Tobias , Lechler Armin , Verl Alexander
Published: September 2014

The motion quality of high precision feed drives is often limited by nonlinear friction effects. This paper presents an approach of using ultrasonic vibrations integrated into the linear bearings of the feed drive in order to control the friction. Measurement results of an ultrasonic excited prototype are shown and a control strategy for stick-slip reduction is proposed.
Determination of the Technical Energy Flexibility of Production Systems
Authors: Popp Richard S.H. , Zaeh Michael F.
Published: September 2014

Besides the energy efficiency approach to reduce energy demands of production systems there are also other possibilities to decrease the energy related operating costs. Amongst others avoiding long-term peak loads represents a common measure. In possible future cases a flexible energy demand of factories can also be refunded by the energy provider within new tariff structures. This paper shows the potentials of production systems to alternate their energy demand within productive state, which is also referred to as technical energy flexibility. The focus is on machines of sensitive main processes, where an influence on the energy demand could induce distinct negative effects on the product quality. It is shown how and to which extent the energy demand of production systems can be controlled without negative effects.
FE-Simulation for a Safe Design of Machine Tool Safety Guards
Authors: Meister Fabio , Uhlmann Eckart
Published: September 2014

The current standards on the safety of machine tools are reliable sources for designers who need to know which materials and thicknesses are appropriate for safety guards on a certain type of machine tool. However, due to various possible designs of safety guards, information about requirements on their fixation is only provided for isolated cases. In this publication, a broad series of FE simulations and impact tests has been accomplished in order to provide quantitative values to machine tool guard designers. In addition, a method to validate FE simulation results and to determine their reliability is presented. This allows an integration of FE simulations in the dimensioning process of machine tool guards and significantly reduces required experimental impact tests.
Methodology for the Efficient Analysis of Thermal and Thermo-Elastic Behaviour of Machine Tools
Authors: Großmann Knut , Galant Alexander , Merx Marcel , Riedel Mirko
Published: September 2014

Thermally induced deviations become the limiting factor for the precision of machine tools. Structure-based finite-element models of high resolution can estimate these deviations with high accuracy but have also a high computational effort. With model order reduction (MOR) these models can be converted into structure-preserving reduced-order finite-element models (FEM-MOR-models) which can be solved very efficiently in MATLAB/Simulink®. To improve model matching selective thermography is used. Selective thermography is a measurement method providing high structural resolution and minimal instrumentation expense due to the use of thermography and photogrammetric methods.
An Approach towards Improving the Robustness of Production Systems
Authors: Stricker Nicole , Lanza Gisela
Published: September 2014

Robustness becomes a crucial feature of production systems. On the one hand, the systems are subject to many disturbances and on the other hand, a reliable production is demanded. A robust system shall be able to keep the working process on a good performance level despite occurring disturbances. To enable such a system’s behaviour, different actions have to be taken. The paper presents an approach to identify the best action to improve a system’s robustness on an operational and tactical level by investigating its disturbances and performance.
Approach to Assess and Compare the Performances of Production Structures
Authors: Schuh Günther , Potente Till , Thomas Christina , Nuyken Timo , Hausberg Carlo , Dany Stefan
Published: September 2014

In this paper an approach to assess the performances of the production structures is introduced. Key figures within this approach are the performance limit of the production structure and the control dependence of the production performance. These figures are visualised for different production structures in a production structure portfolio.
Model Based Optimization of Forging Process Chains under the Consideration of Penalty Functions
Authors: Dannenberg Matthias , Georgiadis Alexander , Behrens Bernd-Arno
Published: September 2014

For the production of forged components, it is necessary to coordinate and optimize the production stages along the different process chains. This includes the mainstream processes as well as the associated process chains and the respective processes of die manufacturing. Until now, these processes and process chains are commonly planned and optimized independently due to different and often contradictory target criteria. This paper deals with an extended approach to a holistic planning and optimization of forging process chains by means of the optimization technique Genetic Algorithm (GA) in order to reduce production costs and time.
Reference Model for the Description of Digital Engineering Tools Based on Mechatronic Principles and Concepts
Authors: Drescher Benny , Reinhart Gunther
Published: September 2014

Today’s engineering demands the collaboration of various specialists in order to provide quality excellence and meet time constraints within engineering projects. Even though mechatronic engineering methodologies display handy instruments (e. g. VDI 2206), they are not sufficiently supported by digital engineering tools. Digital engineering tools are rather characterized based on its discipline-specific functions and omit a holistic mechatronic thinking. On this account, the paper introduces a reference model for mechatronic engineering tools. Thereby, the model boundary bases on mechatronic principles and concepts (e. g. the mechatronic principle of interdisciplinary collaboration and the concept of interdisciplinary knowledge provision). The model is structured into three reference perspectives: Process, application and artifact. While the reference perspective process claims the requirements of mechatronic engineering processes, the reference perspective application represents the interaction with mechatronic developers and the reference perspective artifact forms the digital representation of mechatronic production systems. Being designed deductively, industry-based expert interviews and workshops ensure feasibility of the paper’s approach. Finally, the potential for integration in current software maturity models and the company-specific scaling of engineering tools is mentioned as part of the application’s scope.
Analysis and Simulation of Surface Topographies in Grinding of Thermally Sprayed Coatings
Authors: Rausch Sascha , Siebrecht Tobias , Kersting Petra , Biermann Dirk
Published: September 2014

The abrasive-wear resistance and the lifetime of tribologically stressed free-formed surfaces of forming tools can be increased by thermally sprayed tungsten carbide coatings. In order to improve the surface quality and the shape accuracy, the workpieces must be machined prior to industrial application. A suitable machining process is NC grinding on five-axis machining centres using abrasive mounted points. However, the high hardness of the applied coatings and the small diameter of the utilized tools pose a great challenge for the process design. In order to optimize the grinding process and predict the resulting surface topography, a geometric-kinematic simulation based on the modelling of individual grains using Constructive Solid Geometry techniques was developed. In this paper, the results of fundamental investigations on grinding tungsten carbide coatings and the developed process simulation are presented.
Analytical Model Approach for Tool Temperature Prediction in Broaching Nickel-Based Alloys
Authors: Gierlings Sascha , Brockmann Matthias
Published: September 2014

The following article suggest an analytical model approach for tool temperature prediction in broaching nickel-based alloys. The presented approach is based on an existing model proposed by Komanduri and Hou in 2001, however, includes several modifications in order to better describe the phenomena observed in thermo-graphic measurements acquired during broaching experiments. The novel model approach includes different assumptions regarding the location of heat sources in the cutting zone as well as adiabatic boundary conditions. Moreover, an advancement of the model was made to regard variable contact conditions between tool clearance face and work piece caused by tool wear.
Strength Quality Research of Cement Mortar Blended with Solar PV Cells
Authors: Teng Li Wei , Huang Ran , Hsu Hui Mi , Cheng An , Chang Jia Ruey , Yu Ping Hung
Published: September 2014

In this article we demonstrated the study results of strength quality of cement paste blended with waste solar PV cells. The conclusions were made on effect of this cement replacement. The use of ground solar cells on the mechanical properties of cement-based composite was investigated, and as a result, we identified the factors affecting the strength for those of cement mortar specimens which predefined and made in lab.
Fuzzy Set Approach in the Fatigue Damage Analysis of Composite Structures
Authors: Kędziora Piotr , Muc Aleksander
Published: September 2014

In this study, the fatigue damage progress is analyzed both theoretically and experimentally. The cyclic loading causes damage, reducing the strength until the material can no longer sustain even the service loading. The theoretical analysis is associated with the definition of the damage parameter. The detailed analysis is mainly devoted to the consideration of two structural elements, i.e. a rectangular composite plate (made of glass fibre/epoxy resin) with a centrally located circular hole subjected to cyclic tensile and a square plate (made of aramid fiber/epoxy resin) subjected to shear loading. The experiments demonstrate the scatter of results. The fuzzy set analysis has been proposed in order to estimate the uncertainty in the evaluation of critical number of cycles corresponding to the final fatigue damage..
Modelling and Characterization of Planar Components
Authors: Ourabia Malika
Published: September 2014

An approach for modeling and numerical simulation of planar components using the edge line concept is developed. With this method, we develop an efficient modeling technique for microstrip discontinuities. The structure presents an arbitrary number of ports, each one with different orientation and dimensions. This article presents a hybrid method based on multimode contour integral and mode matching techniques. The process is based on segmentation and dividing the structure into key building blocks. We use the multimode contour integral method to analyze the blocks including irregular shape discontinuities. Finally, the multimode scattering matrix of the whole structure can be found by cascading the blocks. Therefore, the new method is suitable for analysis of a wide range of waveguide problems. Therefore the present approach can be applied easily to the analysis of any multiport junctions and cascade blocks. The accuracy of the method is validated comparing with results for several complex problems found in the literature. CPU times are also included showing the efficiency of the new method proposed.
Analysis on the Application of PV Technology in Terms of Tranditional Roof House. Case Study: Julang Ngapak Sundanese Traditional Roof Form
Authors: Religiana Hendarti , Wiyantara Wizaka
Published: September 2014

This study departs from the thought that the implementation of new technology should consider the local context or the concept of “genius loci”. Based on this conception, this study is aimed to investigate whether the implementation of the current technology (here is PV technology) can be in accordance with the initial local traditional architectural form. To accommodate that objective, the roof form of the Sundanese traditional house called “Julang Ngapak”, located in West Java, was studied to analyse its particular orientation, North and South in regards to the solar incident level. The campus building of Bina Nusantara University, located in Jakarta, was selected for the study of PV roof implementation. The method of the study is simulation by applying the EnergyPlus software. There are three types of PV roof which were simulated to investigate the electricity production of the solar cell. The final deliveries of this study are to compare and to analyse the solar irradiance arrive on each type of roof and to define the most appropriate roof form in terms of orientation for implementing the BIPV concept on building particularly in Jakarta region.
Deciding the Recycling Progress of Refrigerator Compressor Based on Naïve Bayes
Authors: Liu Xue Ping , Cui Yang , Gao Lang
Published: September 2014

Compressor is the heart of refrigeration system, and the most valuable part in a refrigerator from the perspective of recycling. So the recycling progress (remanufacturing or recycling) is critical for taking full advantage of the compressors that run out of use. This paper introduces a method to decide whether to remanufacture or to recycle a compressor based on Naïve Bayes.
Ambient Energy Harvesting for Wireless Sensor Nodes: A Review
Authors: bin Omar Mohamed Hanafiah , Lim Meng Hee
Published: September 2014

Energy harvesting has generated a lot of interest in low power devices and wireless sensing applications as a viable replacement to the batteries that are required to power them. Wireless sensors nodes on the other hand have gain considerable interests from researchers and industries alike. Wireless sensing have the potential to improve productivity of industrial systems by providing greater awareness, control and integration of business processes. This paper attempts to provide an overview of the available technologies and at the same time deduce a practical energy harvesting platform as applied to wireless sensor nodes based on current research.
Monitoring and Fault Identification in Aeronautical Structures Using an ARTMAP-Fuzzy-Wavelet Artificial Neural Network
Authors: Parra dos Anjos Lima Fernando , Silva Frutuoso de Souza Simone , Chavarette Fábio Roberto , Martins Lopes Mara Lúcia , Turra Antonio Eduardo , Lopes Júnior Vicente
Published: September 2014

This paper presents a methodology to perform the monitoring and identification of flaws in aircraft structures using an ARTMAP-Fuzzy-Wavelet artificial neural network. This technique is used in the detection and characterization of structural failure. The main application of this method is to assist in the inspection of aircraft structures in order to identify and characterize failures as well as decision-making, in order to avoid accidents or air crashes. In order to evaluate this method, the modeling and simulation of signals from a numerical model of an aluminum beam was performed. The results obtained by the method are satisfactory compared to literature.
Experimental Investigation of Thermoelectric Power Generation Using Radiative Heat Exchange
Authors: Watcharodom Niran , Puangsombut Withaya , Khedari Joseph , Vatcharasatien Narong , Hirunlabh Jongjit
Published: September 2014

This paper reports experimental investigation of a new concept of waste heat recovery for Thermoelectric Power Generation using Radiative heat exchange principle (TERX). To this end a small scale experimental setup was considered; it was composed of a heated plate, an absorber plate, thermoelectric modules and water cooled heat sink. The dimensions of absorber and heated plates were 0.2 m width and 0.3 m length. The air gap space between the two plates could be adjusted. Ten thermoelectric modules were connected in series parallel (5x2). Tests were made for different air gap spaces and fixed water flow rate (2L/min). A constant electric current (200W) was supplied to the heater of hot plate. Data collected included temperature at various positions and the electrical power generated. Experimental investigation confirmed that using radiative heat exchange principle could be considered for TE waste heat power generation. Increasing air gap decreased the electrical power generated as less radiative heat is absorbed by the thermoelectric modules. Under test conditions, the maximum measured electrical power is 0.3132 W at 0.5 cm of air gap, the corresponding temperature difference between the hot and cool sides of thermoelectric modules was about 35oC. Due to its simplicity of installation as no there is no need for direct contact between the thermoelectric generation set and the source of heat, the proposed concept offers a new alternative for waste heat recovery.
A Study on Proposal of Environmental Assessment Method in Materials and Resource Category of Korea Green Building Certification
Authors: Gong Yu Ri , Tae Sung Ho , Roh Seung Jun
Published: September 2014

The purpose of this study is to propose a method of environment assessment in the field of building materials within Korea Green Building Certification (G-SEED). The method of environment assessment in the field of building materials was examined using LEED of the United States and BREEAM of the United Kingdom, the representative environment-friendly building certification systems in other countries. Especially, each revision of BREEAM was investigated for assessment methods such as environment assessment guidelines and assessment programs. In addition, assessment process and items were analyzed in relation to BREEAM. As a result, for environment assessment in the field of building materials within G-SEED, the method of connecting essential elements such as building material assessment guidelines and database networks with G-SEED was proposed.
Control Instability Applied to a Micro Electro Mechanical Actuator System (MEMS)
Authors: de Conde Kevin Eduardo , Chavarette Fábio Roberto
Published: September 2014

MicroElectroMechanical Systems (MEMS) are devices what have been considered the technology of the future, being used in too many areas. MEMS are a combination of microstructures, micro sensors and micro actuators. The purpose of this work is to reduce the chaotic movement of the micro-actuator electrostatic to a small periodic orbit using the linear optimal control technique. The simulation results show that this technical is very effective.
Utilization of Mosaic Sludge Waste into Fired Clay Brick: Properties and Leachability
Authors: binti Abdul Kadir Aeslina , Rahim Ahmad Shayuti Bin Abdul , Jamil Hidra Hasbee Bin
Published: September 2014

Brick is one of the most common masonry units used as building material. Due to the demand, different types of waste have been investigated to be incorporated into the bricks. Many types of sludge have been incorporated in fired clay brick for an example marble sludge, stone sludge, water sludge, sewage sludge and ceramic sludge. The utilization of these waste materials in fired clay bricks usually has positive effects on the properties such as lightweight bricks with improved shrinkage, porosity, and strength. Therefore, the objective of this study is to incorporate different percentages of mosaic sludge and investigate heavy metals leachability from the mosaic sludge brick. Heavy metals leachability was conducted by using toxicity characteristic leaching procedure (TCLP). Physical and mechanical properties were also determined which are compressive strength, shrinkage, density and initial rate of suction. From the results obtained, it shows that fired clay brick with 5% of mosaic sludge obtained the best result with highest compressive strength and low initial rate of suction (18.76N/mm2 and 10.08 g/mm2) respectively. Nevertheless, all the other properties for all bricks incorporated with different percentages of mosaic sludge were also complied with the BS 3921:1985 standard. The results also demonstrated that the leachability of potential heavy metals in mosaic brick were complied with USEPA (1996) and EPAV (2005a) regulatory limit. In conclusion, mosaic sludge could be an alternative low cost material for fired clay brick as well as providing a disposal method for mosaic sludge waste.
Experimental and Numerical Investigation on Flow Characteristics of a Water Jet Impingement
Authors: Kitcharoenpaisarn Chatchai , Tangwarodomnukun Viboon
Published: September 2014

Water jet impingement on a flat target surface can be seen in cooling and cleaning applications, where the flow velocity, static and dynamic pressures are the three main parameters to be considered. Although the jet impingement is a basic free-surface liquid flow, the understanding of flow characteristics after the impingement is essentially needed to elucidate the flow behaviors and its influences to some specific processes. Therefore, the aim of this study is to investigate the flow characteristics of water jet impingement on a solid surface through the computational fluid dynamics and experiments. An obstacle with different thickness was added into the target surface, representing the uneven morphology of workpiece surface to be cooled or cleaned. The parameters considered were the jet impact angle and obstacle thickness, and the water layer formed radially from the stagnation point was observed and analyzed. According to the results, there was a good agreement between the numerical and experimental findings. The jet impact angle was found to remarkably affect all the performance characteristics examined in this study. The water flow characteristics were found to be changed after the flow impinged and passed over the obstacle. In addition, the static and dynamic pressures caused by the impingement were also presented and discussed.