bluuebunny/crossref_metadata_2025 huggingface dataset:
How to Involve Students in an Online Course
Authors: Tsai Chia-Wen
Published: September 2013

In an online course, students learn independently in the virtual environment without teacher’s on-the-spot support. However, many students are addicted to the Internet which is filled with a plethora of shopping websites, online games, and social networks (e.g. Facebook). To help keep students focused on and involved in online or blended courses requires teachers’ exquisite design of their online teaching methods and learning activities. Thus, the author in this study redesigned his online pedagogy, collaborative learning (CL) with initiation and self-regulated learning (SRL) with feedback, based on the teaching results from previous semesters and his own self-reflection. This study involved an experiment that included 227 sophomores from four class sections. The results of this study indicate that students from CIS group (who received online CL with initiation and SRL) had the highest involvement. The implications for educators that plan to deliver online learning were also provided in this study.
Differential Effects on ERP Post-Adoption Stages across Scandinavian and Iberian SMEs
Authors: Ruivo Pedro , Oliveira Tiago , Johansson Björn , Neto Miguel
Published: September 2013

Enterprise resource planning (ERP) post-adoption stages (use and value) and small and medium enterprises (SME) are of high interest among both academics and practitioners. Grounded in the diffusion of innovation theory to explain ERP use and resource-based view theory to explain ERP value the authors postulate that use is an important link to value. The authors propose and test a model using a unique dataset of 883 SMEs from Scandinavia and Iberia. Whereas for both regions, competitive pressure, efficiency, and best-practices are important factors to use ERP, analytics and collaboration are important factors for ERP value. Whereas complexity and training are not relevant for ERP use among Scandinavian SMEs, they are facilitators for Iberian firms. This is an empirical theoretically grounded research studying ERP use and value among SMEs across two distinct European regions, thus adding an international dimension to the IS literature, as well moving beyond dichotomous “adoption versus non-adoption”.
XBRL
Authors: Liu Chunhui
Published: September 2013

Ranked as one of top ten technologies for accounting and auditing professionals, eXtensible Business Reporting Language (XBRL) is a freely available, open, and global standard language for exchanging business financial information digitally. XBRL holds the greatest promise for building a global standard that is pledged to enhance the accuracy, reliability, efficiency, accessibility and availability of electronic communication of business financial data. This paper sets out to provide a review of literature to lend insights into our understanding of XBRL adoption, implementation, and value realization assessment. A comprehensive review uncovers four sub-themes of research in XBRL adoption: perceived benefits of XBRL adoption; organizational readiness; external pressure; and XBRL adoption. Research challenges for future research are highlighted.
The Challenge of Establishing a Recognized Interdisciplinary Journal
Authors: van de Kaa Geerten , Blind Knut , de Vries Henk J.
Published: September 2013

This paper examines the impact of interdisciplinary IT standardization research by analyzing the International Journal of IT Standards and Standardization Research (JITSR). Three issues will be addressed: (1) What is the scientific impact of IT standardization research published in JITSR? (2) Are JITSR publications on IT standardization interdisciplinary, and if so, to what extent do they cite publications in other disciplines? (3) Is IT standardization research recognized as an interdisciplinary discipline, and if so, to what extent do papers in other disciplines cite JITSR publications? The authors find that although the scientific impact of JITSR is comparatively low, it is recognized in different disciplines. The findings also show that research published in JITSR is, to some extent, interdisciplinary; papers published in JITSR refer to a number of different disciplines.
The Role of Expected Reciprocity in Knowledge Sharing
Authors: Endres Megan L. , Chowdhury Sanjib
Published: September 2013

The authors investigated the effects of expected reciprocity on knowledge sharing, as moderated by team and individual variables. Data (n = 84) was collected in an experimental study from undergraduate business student participants. Effects of expected reciprocity on knowledge sharing depended on the levels of individual competence, positive team attitudes, functional diversity and demographic diversity. Implications include that the effectiveness of reciprocity in knowledge sharing depends on several factors relating to the team and individual. Encouraging reciprocity may have positive effects, but these can be overridden by poor team attitudes, low ability perceptions and team diversity. Future research suggestions are offered.
Semi-Automatic Annotation of Natural Language Vulnerability Reports
Authors: Wu Yan , Gandhi Robin , Siy Harvey
Published: September 2013

Those who do not learn from past vulnerabilities are bound to repeat it. Consequently, there have been several research efforts to enumerate and categorize software weaknesses that lead to vulnerabilities. The Common Weakness Enumeration (CWE) is a community developed dictionary of software weakness types and their relationships, designed to consolidate these efforts. Yet, aggregating and classifying natural language vulnerability reports with respect to weakness standards is currently a painstaking manual effort. In this paper, the authors present a semi-automated process for annotating vulnerability information with semantic concepts that are traceable to CWE identifiers. The authors present an information-processing pipeline to parse natural language vulnerability reports. The resulting terms are used for learning the syntactic cues in these reports that are indicators for corresponding standard weakness definitions. Finally, the results of multiple machine learning algorithms are compared individually as well as collectively to semi-automatically annotate new vulnerability reports.
Based on VERICUT Software Simulation of Multi-Axis Processing Cylindrical Cam Research
Authors: Niu Xing Hua , Zhang Zhen Tao , Meng Xian Li , Yang Ze Feng , Liu Yi
Published: September 2013

This paper of simulation studying is mainly aiming for the typical part of multi-axis processing cylindrical cam by analyzing design drawings and technical requirements of processing, planning NC processing technology, creating cylindrical cam model and importing NC program to VERICUT simulation software. In this way, simulation of the entire machining process could be observed clearly.
Solder Short Reject Reduction in Soft Solder Die Attach (SSD) Process Using Mechanical Solder Shield Design
Authors: Rashid Amirul Abd , Yow Kai Yun , Nor Hayati Saad , Freddawati Rashiddy  Wong
Published: September 2013

This paper presents a development of mechanical solder shield, which was integrated to the Soft Solder Dispenser (SSD) die attach machine. The innovation of the mechanical shield has proven its ability to prevent the molten solder overflows to the lead area of the device. As a result, it reduced number of solder short defects. The manufacturing assembly yield is maintained at the highest level; ensuring fitness for function and production cost of the product remain competitive.
Optimization Design of Connecting Rod in Twin-Rotor Cylinder-Embedded Piston Engine
Authors: Chen Hu , Pan Cun Yun , Xu Hai Jun , Zhang Xiang , Zou Ten Gan , Zhang Lei
Published: September 2013

For cylinder-embedded piston in Twin-rotor piston engine, the piston and rod are both the important component of power transmission, and their design directly affects the efficiency of engine. For comparison of the piston, ether from sealing and lubrication or the appearance, it is consistent with that of traditional engine, but the rod is different from the old one. In this paper, the static strength of rod is modeled and analyzed, and based on that the structure of rod is optimized by ANSYS workbench. It can be concluded that: for the rod, the maximum of mass, stress and deformation are determined by the three parameters, which are rod length L, width b and height H. The mass of rod is proportional to them, and the levels of impact of the parameters to the targets, from maximum to minimum, are b, H and L successively. However, a comprehensive consideration is necessary for the parameters selected based on the practical condition.
Analysis and Optimizing Utility of the Ultra Supercritical Steam Turbine Shaft Vibration
Authors: Pang Ke , Xu Hai Chuan , Zhang Liang Bo
Published: September 2013

The operation reliability of the power plant has much to do with the turbine shaft vibration. The object of this paper is N1000-25.0/600/600 steam turbine. In view of the turbine shaft vibration fault, the analysis and solution were made in two conditions. They refer to start-up and on-load steam turbine running state. The solution methods have produced a good result. And they can be used for reference to the turbines of the same type in the future.
The Finite Element Analysis and Optimization of Wave-Framebased on ANSYS
Authors: Wang Shou Jun , Yang Li Bo
Published: September 2013

When it comes to the design of a wave-frame,empirical design is always adopted domestic,which is relatively conservative on stiffness and intensity and prefer a bigger factor of safety,thus these bring many uncertainties to the wave-frame.In order to reduce the negative effect to the wave system,the analysis of the wave-frame based on ANSYS is executed to have a knowledge of the weakness and the deformation of various parts.On the permise of ensuring the stiffness and intensity,with the method of grouping and using different profile steel,the purpose is to reduce the mass snd the negative effect brought by mass,and achieve the goal of optimization.
The Comparison of the Exhaust Emissions from an Agricultural Tractor and a Truck
Authors: Lijewski Piotr , Merkisz Jerzy , Fuc Pawel , Daszkiewicz Pawel
Published: September 2013

The paper discusses the issues of exhaust emissions from farm tractors most frequently used for transport of loads. Transport is an integral part of food manufacturing at almost every stage of the product life cycle. Ready-to-eat food very often needs processing; it often incorporates transport of half products to appropriate facilities. The transport between the processing facilities and the distribution of food products is carried out by typical road vehicles i.e. heavy and light trucks. In the case of agricultural produce it is very often the farm tractors with appropriate trailer sets that are used for transport. The paper presents a comparison of the exhaust emissions and fuel consumption from a farm tractor and a truck. The tests were performed under actual operating conditions in real traffic. For the tests the authors used PEMS equipment (Semtech by Sensors). Both vehicles covered the same route with the same load.
New Type of Two Degree of Freedom Motor Three-Dimensional Tooth Layer Field Application and Solution
Authors: Yang Wen Huan , Chen Hai Xu , Xie Shuang , Fang Chun Ren
Published: September 2013

A new Multi-degree of freedom motor and its establishing of teeth layer parameters have been introduced in the paper, also including application method of database, namely using Quasi-Newton methods to solve the non-linear equations of the new motors magnetic circuit net, formed a refined method for designing and analyzing of motor. The establishment of 3d tooth layer parameters database, is provided for the calculation in the design of the new type motor conveniently.
Estimation of Electric Vehicle Battery Ohmic Resistance Using Dual Extend Kalman Filter
Authors: Chen Qiao Yan , Wei Ke Xin
Published: September 2013

Using the traditional measurement analysis methods to estimate electric vehicle lithium ion battery ohmic resistance, it is difficult to realize on line. We in this paper use dual extend kalman filter (DEKF) based on thevenin model to solve this problem. DEKF is a kind of circulative iteration algorithm of two kalman filters, applied in the estimation which the systems state and parameter both are unknown. Using DEKF on the estimation of battery ohmic resistance only need the battery current and terminal voltage, therefore, it can be realized on line easily. This paper verified the effectiveness of DEKF through simulation and analysis of the test data.
A New Loading Device Driven by Voice Coil Motor
Authors: Xu Peng , Men Yu Tao , Xu Bao Shan , Yang Qiang , Lu Jun , Zhang Chun Qiu
Published: September 2013

The mechanical environment has an important influence on biological behavior of the human musculoskeletal system. Either in vivo or in vitro culture, the growth and development of the musculoskeletal tissue depend on the mechanical environment. Now we propose a new loading device which uses a voice coil motor as driving force to further optimize tissue engineering bioreactor. It can not only provide tissue engineering in vitro culture with different sizes and frequency of loading environments within the physiological range, but also detect the mechanical properties of the culture in building process. This device, which uses the voice coil motor as driving force and closed-loop encoder to control displacement, has the characteristics of low power loss, high acceleration and smooth loading, and can achieve a high-precision loading process with different ranges such as from high-speed to low-speed. The device can facilitate the load research in build process of the engineered musculoskeletal system.
Research on Supporting Effect of Dynamic Var Compensation to the Security of Large-Scale Wind Power Integration
Authors: Li Xiang , Li Peng , Wang Ning Bo , Chen De Zhi , Zhu Xiao Rong , Song Yun Ting , Ding Mao Sheng
Published: September 2013

There are security and stability problems happened in northwest china power grid connected with jiuquan large-scale wind farms in practice, such as voltage rising and low-frequency oscillation. Analyzing data is the high load mode of Northwest Power Grid in the winter of 2012 in this paper. On this basis, simulation was implemented by using BPA simulation software to analyze the support and improvement of dynamic reactive power compensation equipment on security problems happened in jiuquan. Analysis results show that: dynamic reactive power compensation equipment has characteristics as automatic, fast regulation of reactive power. The security and stability of power grid connected with jiuquan large-scale wind farms can be enhanced effectively when these characteristics are full used.
Sino-Singapore Tianjin Eco-City Wind and Solar Hybrid Lamps Testing System Design and Application
Authors: Zhang Dong Sheng , Sun Bao Xin
Published: September 2013

In this paper, we study the wind and solar hybrid lamps testing system which is based on wireless communication design. The collected data will be calculated. The paper analyses six typical points to research the solar energy, wind energy to the battery energy conversion. Moreover, the paper also analyses the scenery energy and fan speed data for four seasons, providing scientific basis for eco-city management analysis of local natural resources utilization.
Study on Voltage Stability Weak Buses of Power System with Multiple Power Sources Integrated
Authors: Li Jia Long , Wei Wei
Published: September 2013

To obtain the distribution of voltage stability weak buses (VSWB) for power system with multiple power sources integrated, so as to provide a basis for voltage stability control, an analysis method under full time frame is proposed in this paper. Based on the modeling of multiple power sources, combined with the load prediction, the active power output prediction of wind and photovoltaic power and the generation scheduling of conventional power, considering different patterns of load increase and power output increase and allocation of multiple power sources, within a certain period of time and for the specifically selected time sections, the continuation power flow method is respectively used to get the voltage stability critical point (SNB point), where modal analysis is applied, so that the VSWB are obtained of the certain time section. The same calculation is carried out for all the time sections selected, and then the distribution and occurrence frequency of VSWB are summed up, thereby acquiring the concrete condition of VSWB within such certain time period. Its considered that the condition of VSWB can be affected by the different integration buses and penetration rates of multiple power sources. The proposed method is verified on the IEEE 118-bus system, as well as the fact with practical significance that the condition of VSWB varies with the difference of integration buses and the penetration rates of multiple power sources.
PV Panels Laying Method Study
Authors: Ye Yi Da
Published: September 2013

In this paper, the problem of how to design a photovoltaic house to achieve the maximum power generation is discussed. An optimized solution of laying PV cells on house surface is proposed based on the solar radiation data of Da Tong (Shan Xi Province). Meanwhile, the concept Utility Factor per area is introduced and the inefficient combinations are discarding. Then Dynamic Programming Algorithm is applied to maximize the cells on each surface. It can be chosen that the inverters based on electric current, voltage, power and price after the layouts have been decided. Finally, the total power generation in a year and the total profit during PV cells lifetime is calculated. The solution involves various fields and covers every aspect of the problem as well evaluates the total benefits efficiently.
Reduction of Metal Contents in Coal Stockpile Wastewater Using Electrocoagulation
Authors: Bow Rusdianasari , Arita Susila , Ibrahim Eddy , Ngudiantoro Ngudiantoro
Published: September 2013

Stockpile wastewater consisted of ferrous metal, manganese metal and total suspended solid (TSS). In addition, it also has high acidity (pH) which is possibly harmful to the environment. This research objectives were to reduce ferrous and manganese metal in coal stockpile wastewater using electrocoagulation technique using aluminum electrode with variation in electrics current and processing time. The most effective conditions in reducing ferrous and manganese concentrations with electric current of ± 2.5 A in 90 minutes. Effectivity in ferrous and manganese metal reduction was 98.7% and 99.6%, respectively. The final concentration of ferrous and manganese metal was 0.08 mg/L and 0.01 mg/L respectively. Optimum concentration of TSS reduction was 83.7% with the final concentration of 72 mg/L. The wastewater pH value became 7,1. Finally, the results demonstrated that the electrocoagulation process using aluminium electrode is a reliable technique for removal of pollutants from coal stockpile wastewater.
Application of Damper in the Seismic Engineering
Authors: Zhong Teng Fei , Bai Yu , Sun Ya Juan
Published: September 2013

The article describes the theory and application of energy dissipation technology. Puts forward the simplified modeling and optimization of damper stiffness parameter method .Through nonlinear time history of the structure show its obvious seismic effect. Prove that the method has certain reference value of the energy dissipation design.
Research on Maintenance Cycle Optimization of Power Generation Equipments Based on PSO
Authors: Liu Yi Gang , Liu Zhu , Liang Jun Hui , Liao Si Zhe , Yang Kai Ping
Published: September 2013

Maintenance cycle optimization of power generation equipments is a complex decision-making process which needs to consider risk, availability and cost .This paper uses Probabilistic risk assessment (PRA) technology in maintenance cycle optimization, establishes multi-component maintenance risk-cost model,conducts comprehensive optimization best cycle and the lowest cost. Introduce PSO method as optimized decisions, find the optimal maintenance cycle for the target of the lowest total maintenance costs and achieving the required level of safety, improve optimized speed and the quality of reconciliation.
Knowledge Management for Manufacturing Process Based on Knowledge Lifecycle to Enhance Data Sharing (Perception: Application and Benefits)
Authors: Kurniawan Yohannes
Published: September 2013

The importance of effective knowledge management is well recognized in a number of manufacturing companies. There is still, however, a clear need to further reinforce applications of knowledge management tools by effectively solving fundamental and specific problems related to knowledge management practice in manufacturing industry. The paper presents the concept specifically for the business case at the palm oil companies, where the tools are used to transfer the knowledge over different life cycles of the production process to enhance data sharing. This paper put forward a knowledge management operation mode for manufacturing process based on knowledge lifecycle, and research the operation mode from the points of the knowledge acquisition stage, knowledge sharing stage, and knowledge utilization stage. This paper gives a value to manufacturing companies to develop initiatives to share knowledge to achieve business objectives.
GA Implementation Path Optimization of Pneumatic Marking System
Authors: Shao Lei , Zuo Hai Bin , Liu Nan
Published: September 2013

According to the characteristics of pneumatic marking system, and the typing path was seen as a TSP problem. After comparing the Dijkstra optimization algorithm of marking path results, and applying the genetic algorithm (GA) to analysis, research, and solve the optimization problem, reasonable to get print needle typing path. In this case, printing mark time was shorten as much as possible. It was proved by MATLAB simulation that the study can solve the problem of path optimization and improve the efficiency of marking greatly.
Experimental Method to Evaluate Unbalance Vibration for Machine Tool Spindle Integrated with Automatic Balancer
Authors: Fan Hong Wei , Jing Min Qing , Liu Heng
Published: September 2013

Unbalance is one of the main vibration sources of rotating machinery. Study on the response of unbalance is important for the machine tool spindle dynamic performance evaluation and balancing technology. How to simulate the unbalance automatic generation and how to effectively analyze the unbalance vibration signal are two main problems. In this paper, an electromagnetic balancer is used to act as the unbalance generator to imitate the tool unbalance during machine tool operation. An integrated spindle with the balancer is developed and the acceleration and displacement sensors are applied to pick up the unbalance vibration. The filtering, linear FFT and averaging are applied to extract the fundamental component from the original signal. The displacement peak-peak value and acceleration peak value are chosen as the characteristic parameter evaluating unbalance response and the shaft orbit is adopted to recognize unbalance intuitively. The experimental results show that the unbalance simulation and signal analysis method are feasible and effective.
The Research on Temperature Control System of Heat Transfer Station Based on Genetic Algorithm PID Control
Authors: Shao Lei , Liu Nan , Zuo Hai Bin
Published: September 2013

The building heating energy consumption has drawn peoples attention gradually. Heat transfer station, as the central part of the heating system, has the characteristics of great inertia, pure delay in the temperature control system. Considering these characteristics, the GA-PID arithmetic was presented, and a simulation model was created in this dissertation. Comparing with traditional PID control, GA-PID control system has a half overshoot, shorter adjustment time, higher accuracy, and enters into the steady state faster. The simulation results prove the correctness and effectiveness of the proposed control scheme.
Measuring Mass Transfer on Biodiesel Process by Means of Impedance Measurement
Authors: Rachmanto Tri , Allanson David , Matthews Christian , Jenkinson Ian
Published: September 2013

Transesterification is commonly used to produce biodiesel from methylester. In order to control the conversion process is useful to employ process monitoring, in particular monitoring of the mass transfer processes that limits the initial rates of transesterification. Monitoring of these initial stages of the reaction may allow for process optimization. Many methods have been identified to monitor reaction progress. This paper proposes a method to monitor the initial stages of the biodiesel production process using impedance measurement. The impedance measurements presented show the expected sigmoid curves that are associated with mass transfer (mixing) processes taking place during the early stages of the transesterification process.
Electromagnetic Measurement System for Monitoring Crack of Conductivity Material
Authors: Wu Dong Yue
Published: September 2013

Electromagnetism based detection has advanced rapidly in recent years because of its characteristics of non-contact and non-invasion nature. An electromagnetic measurement system for monitoring the crack of conductivity material was presented in this paper. The system consists of signal source module, measuring module and demodulation module. In order to evaluate the system performance, some prime experimental work was undertaken, the results showed the feasibility of the system.
Video-Based Integrated Fire Detection, Positioning and Water Cannon Suppression Intelligent System
Authors: Yuan Wei , Yuan Jie , Li Yao Dong , Wang Xiao Wei , Zhang Yong Ming
Published: September 2013

Fire detection system has been developed for years, but the existing systems are either non-intelligent or non-integrated. This paper supposed a design of an intelligent and integrated fire safety surveillance system. We integrate video fire detection, fire positioning and fire suppression together into one intelligent system. Firstly, the video fire detection subsystem could recognize fire in the monitoring scene by processing the image sequences from the camera in real time. This subsystem will send fire alarm and video of fire scene to the control centre, and the centre will give positioning commands to the fire positioning subsystem. Secondly, the fire positioning subsystem will compute the coordinates of fire by images from two cameras of different position. The position information of fire will be also sent to the control centre and the centre will command fire suppression subsystem to work. Finally, the fire suppression subsystem could adjust the water cannon to the fire according to the coordinates of fire and spray water to put out the fire automatically. This integrated system can work independently and automatically. This system is applicable to various places, such as warehouse, workshop, dormitory, etc.
Application of Laser Doppler Technique in Measurement of Explosive Container Based on Frequency Correction
Authors: Liu Hong Li , Shao Lei , Zuo Hai Bin , Liu Nan
Published: September 2013

Dynamic measurement of explosion containment vessel deformation for explosive experiment is obtained using laser doppler effect. The system is based on optical heterodyning technologies, and uses half wave plate, quarter wave plate, polarization beam splitter and acousto-optic modulator to improve the intensity of doppler signal and signal-noise-ratio. Short time fourier transform and energy centrobaric correction method using hamming window is applied to improve the signal processing speed and the accuracy. The experimental results of explosive container are presented under 20g TNT explosion.
Characterization of Activated Carbon from Oil Palm Shell Prepared by H3PO4 for Procion Red Dye Removal
Authors: Hariani Poedji Loekitowati , Faizal Muhammad , Ridwan  , Marsi  , Setiabudidaya Dedi
Published: September 2013

Characterization of activated carbon from oil palm shell prepared by H3PO4and application for the removal of procion red dye was investigated. Oil palm shell was carbonized at 500°C and prepared by H3PO45 % with ratio of 1:3. Characterized activated carbon by Fourier Transform Infra Red Spectroscopy (FTIR), Brunauer Emmet Teller (BET) surface area, Scanning Electron Microscope-Energy Dispersive X Ray Spectrometry (SEM-EDS). The result indicated that functional groups on the activated carbon surface were influenced by acidic treatment. The activated carbon have surface area 385.991 m2g-1and volume of micro porous 0.201 cm3g-1. The SEM-EDS image showed that activated carbon have many porous structure and the strong peak of C was 92.7 %. Adsorption capacity of activated carbon prepared by H3PO45 % was 278.197 mg g-1which is higher than not chemical activation was 216.456 mg g-1at equilibrium time 5 h.
Research of the Distance of Transmitting Antenna and Test Window to Measure Shielding Effectiveness of Material Using Shielded Room Method
Authors: Qin Li Jun , Yang Hao Liang
Published: September 2013

t has the certain request to the distance of transmit antennas and test window when measure the effectiveness of material using shielded room method. In order to obtain the shielding effectiveness of materials on the plane wave, far field emission state of the antenna should be ensured-distance of transmitting antennas and test window distance should be far enough. This paper presents a near-field shielding theory of a shielded room, explaining the effect of the distance on the shielding effectiveness measurement results fundamentally. The theory can be used to guide the test that measures shielding effectiveness of material using shielded room method.
Design for Network Management System Assessment in Power Communication Network
Authors: Sun Feng Jie , Zhang Min , Qi Jing Liang , Li Hai Long , Wang Wei Qing , Wang Hua
Published: September 2013

With the complexity of power network, request for communication network of electric power has been improved gradually. Network management system (NMS), as an important part of power communication network, can realize monitoring of the network operation and achieve a rational allocation of resources. To ensure the safety operation of NMS, assessment should be given. This paper combines the indexes and algorithm to give an effective analysis to reliability and validity of the system, which can realize comprehensive evaluation and provide effective monitoring to the safe operation of NMS.
Image Analysis Based on the Haar Wavelet Transform
Authors: Ma Cui Hong , Li Yi , Wang Ying
Published: September 2013

Wavelet is a kind of mathematics tool rapid development in recent years and widely used in various areas of technology, Wavelet analysis of image processing is the most widely used and mature areas. Wavelet change based on the features, Using Matlab software, this paper analyses the wavelet in image decomposition, denoising, compression, reconstruction, etc . Concluded that the wavelet transform for image processing have ideal effect.
Study of Improved Feature Technology for Abnormal Sound Recognition Based on Empirical Mode Decomposition
Authors: Wang Hui , Wang Liang , Jun Yu Li , Liu Shao Ying
Published: September 2013

There has been increasing attention to the abnormal sound in our daily life, its identification technology has become a current research focus of non-speech signals. Aiming at abnormal sound detection and recognition in a large parking lot, this paper put forward a new approach to the feature extraction process of advanced Mel frequency cepstral coefficients (MFCC) based on empirical mode decomposition (EMD) for abnormal voice recognition, and Gaussian mixture model is used to design the classifier, implementing the classification for abnormal sound recognition of peoples scream, glass broken, car alarm and crash sound in the parking lot. The results demonstrated that the proposed of improved MFCC feature extraction algorithm can get more dynamic information ,hence have a higher recognition rate for abnormal sound, and the new characteristic feature has better robustness and accuracy under different signal-to-noise ratio.
Enhancement of Ev On-Board Diagnostics System into Preliminary Operation Using Estimation Theory
Authors: Chen Chun Liang , Hsu Chan Wei
Published: September 2013

This paper presents a recent study to construct an EV preliminary research platform using hybrid communications. Vehicular network, which integrated battery and powertrain information, is applied for performance display and on-line diagnostics. Mobile communication offers one-way data collection for remote surveillance when data transmission is continuously linked with server through mobile communication. Data acquisition is handled by on-board unit via EV CAN network. However, on-line data size, e.g. state of health, is so huge that it isnt easily transmitted when hundreds of vehicles are simultaneously connected for data logging into server. Taking SOH as example, the continuity of curve variation is a challenge in order to be effectively provided for remote health estimation. Hence, estimation theory is applied and embedded into hardware implementation before data reporting. Cubic spine and linear Kalman filter are applied to curve fitting and estimation for data size reduction. The proposed system provides not only information display but also on-board diagnosis; furthermore, the processed data can be devoted to EV preliminary operation in Taiwan.
Survivability Assessment Modeling for Command Information System
Authors: He Xin Hua , Ma Yi Nan , Guo Qi Shen
Published: September 2013

The Bayesian network for survivability assessment modeling of command information system is introduced. We establish survivability evaluation model from three aspects, the network node, the network structure and model parameters. Proposed the attribute dependence progressive genetic.
The Research on Automatic Generation of Process Diagram in CAPP System for Shaft Parts
Authors: Yu Jing Hua , Wu Meng Hua , Ren Shao Chuan
Published: September 2013

Automatic generation of process diagram is developed in CAPP for shaft parts. The processing code to express the processing is used as a link to get the information of process diagram from the parts and processing information, so the topological relationship is established between the various components of surface on parts. The parts diagram, the rough diagram and process diagram are drawn by graphics sub-module with the shape feature flatten based on graph theory and the diagram related marking is also completed. Practical instances are given to analyze and verify.
A System Dynamics Approach for Evaluating Policies on Prioritizing Public Transportation
Authors: Li Kun Da , Zhou Si En , Yang Xin Miao
Published: September 2013

This paper provides a modeling framework based on the system dynamics approach by which policy makers can understand the dynamic and complex nature of the policies on prioritizing public transportation within a transportation socioeconomic system. Since the government has implemented the policies on prioritizing public transportation, a framework that helps policy makers to understand the impacts of such policies is currently quite relevant. Within this framework, 6 basic subsystems: population, economic development, environmental influence, public transport development, private cars development and priority polices, focuses on the short-and long-term system behaviors.
Study on Engagement Features for a Novel Spherical Engine
Authors: Zhang Zheng Zhou , Pan Cun Yun , Xu Xiao Jun , Xie Qiang , Feng Yi Fei
Published: September 2013

Based on engagement theory, this paper presents the principle and the process of modeling and simulation of a novel spherical engine. When considering the operate device of the spherical engine as a spherical cam, we use the theory of conjugated surfaces to analyze the engagement surfaces between the cam and the follower, the equations of the engagement surfaces as well as the expression of pressure angle are built. Finally, we use the mathematical tools to describe the trace of the engagement surfaces.
Trajectory Compensation of Chute Constrained Chain Drive
Authors: Li Xiao Juan , Hong Lin , Du Bing
Published: September 2013

A method for path compensation of constrained chain transmission with heavy loads is presented in the paper. Polygon effects generated in chain transmission has been analyzed in the paper. Relevant position compensation programs and compensation trajectory have been given. As a result, polygon effects have been greatly reduced. This approach also provides a reference for other chain drive with constrained path.
Research on Unsteady Aerodynamics Modeling Based on Back Propagation Algorithm at High Angle of Attack
Authors: Wang Hong Biao , Lv Bin Bin , Yang Xiao Juan , Luo Tai Yuan
Published: September 2013

with the BP algorithm, this paper sets up the High angle of attack unsteady aerodynamic neural network model. By using the large-amplitude pitch oscillation dynamic test data of some slender model in high-speed wind tunnel, this paper trains and verifies the BP neural network model and discusses elements which may influence the arithmetic speed and prediction accuracy of the neural network model. Test results show that the established BP neural network model matches the wind tunnel test results nicely and has relatively good capacity to predict the High angle of attack unsteady aerodynamics.
On the Solving of Variational Inequalities of Stationary Problems of Two-Phase Flow in Porous Media
Authors: Badriev Ildar B.
Published: September 2013

We consider a variational inequalities of the second kind with cocoercive operator and a non-differentiable proper convex functional. Such inequalities arise in the mathematical modeling of the problem of finding the boundaries of ultimately-stable pillars of residual viscous-plastic oil. To solve the variational inequalities we suggest the iterative process and its convergence investigated. The numerical results confirm the efficiency of the proposed method.
Finite Element Analysis of Fir-Tree Blade-Disc Assembly
Authors: Dargahi Ashkan , Masoudi Mehdi , Nakhodchi Soheil
Published: September 2013

The safe operation of industrial gas turbines is dependent on the structural integrity of the critical geometrical features such as blade-disc attachments. Knowledge of stress distribution in this region is the principal necessity for damage tolerance analysis and lifetime estimations. The finite element analysis which includes contact between two deformable bodies is complicated and takes extensive computational costs. A simplified FE model is needed which could predict the stress distribution without modeling the exact contact features. The main objective of this study is to present and compare two simplified FE models which can predict stress distribution at blade disc interface. Fir-tree region in a gas turbine disc assembly is modeled and comprehensive 2D and 3D non-linear finite element analysis is carried out. FE results are verified using photo elasticity method.
A Method for Determining Acceleration Factor of Models with Bathtub Failure Rate
Authors: Hu Xiao , Ma Xiao Bing
Published: September 2013

Traditional Weibull distribution is unable to model the complete lifetime of systems with a bathtub failure rate function. As a consequence, a new model is quoted in this paper, in which the conditions of models with bathtub failure rate function failure mechanism and the method to determine acceleration factor are discussed in detail. Furthermore, I make an example by using the best overall unbiased estimation to illustrate the method. In addition, parameter range of the acceleration factor is given at last.
A New Dynamic System Analysis
Authors: Mi Bao Liang , Wu Guo Zeng
Published: September 2013

A new four-dimensional chaotic system is presented in this paper. Some basic dynamical Properties of this chaotic system are investigated by means of Poincaré mapping, Lyapunov exponents and bifurcation diagram. The dynamical behaviours of this system are proved not only by performing numerical simulation and brief theoretical analysis but also by conducting an electronic circuit implementation.
BSDEs Driven by Continuous Semi-Martingales under Locally Lipschitz Condition
Authors: Li Shi Yu , Wang Jin Hui , Gao Wu Jun
Published: September 2013

In this paper, we deal with multidimensional backward stochastic equations (BSDES) driven by continuous semi-martingale. We first obtain the existence of solution for this kind of BSDES with locally Lipschitz coefficient, which generalizes the corresponding results in Khaled Bahlali.
An Improved Algorithm of Path Planning for a Mobile Robot
Authors: Jia Xue Mei , Sun Qi Yuan
Published: September 2013

Navigation is a key technology of mobile robot. The information of path planning for navigation is always incomplete in dynamic time-varying environment. In this paper, based on grid environmental model, an improved algorithm of path planning is proposed combining ant colony optimization with rolling window for an unknown complex environment with obstacles. A sub-target point can be searched within a rolling window according to the heuristic information about a target point, the improved algorithm can plan a local optimal path for the mobile robot in a rolling window. Simulations show that the improved method is feasible for path planning in an unknown environment.
Neural Network Approach to Gain Scheduling for Traction Control of Electrical Vehicles
Authors: Young Jieh Shian , Lin Yi Pin , Shih Po Wen
Published: September 2013

This paper proposes a gain scheduling approach by neural network to force control of the electric vehicle wheels. To approximate to the reality in simulation, we utilize the traction force database of the motor, called the current-RPM-torque database, instead of the slip ratio measurements. The system is nonlinear and a constant gain cannot overcome all road conditions of the traction force control for the electric vehicles. The appropriate gains for different road conditions can be the training data of the neural network. In this paper, the proper parameters for the RBF neural network are obtained. The appropriate gains which have to fit the assigned specifications in time domain seem to be inverse proportion to the slip ratio slope.
The Study and Confirmation of Kinematic General Formula for Chain-Type Self-Reconfigurable Robot
Authors: Ge Wei Min , Zhang Hua Jin , Wang Xiao Feng , Lei Ying Lin , Zhao Teng , Zhang Yue
Published: September 2013

As an intelligent system, self-reconfigurable robot is able to change its configuration depending on different environments and tasks. This work illustrates an approach to the study on the process of deformation from chain-type configurations to circular configurations. In this work, the junction surface of module units and coordinate transform matrix are defined. And the general formulas are deduced based on the D-H method and mathematical induction as well. The motion trail, velocity and acceleration of the end docking face during the deformation are simulated by RecurDyn and MATLAB. The simulation results prove the correctness and validity of the general formula. The approach estimates the kinetic trajectory and reconfigurable space.
Nonlinear Calculation of Active Magnetic Bearings Dynamic Magnetic Field by Finite Element Method
Authors: Ding Guo Ping , Gao Bin
Published: September 2013

Active magnetic bearings open-loop instability makes the features of dynamic magnetic field crucial to the control performance. We presented a nonlinear calculation of AMBs dynamic magnetic field by FEM. Firstly, we constructed a AMBs dynamic field FEM model considering the magnets nonlinear permeability; Secondly, we applied a harmonic current to the coils through 160 load steps and a zero magnetic potential boundary condition; Finally the field was solved and magnetic flux lines, air gap flux density and eddy current density were retrieved and analyzed. Because of the nonlinearity of eddy current, air gap flux density is not standard harmonic and lags behind the source current,and as magnetizing energy equalizes eddy current losses, air gap flux density approaches harmonic.
Electromagnetic-Thermal Modeling of Electromagnetic Brake Using Finite-Element Analysis
Authors: Zhang Bo , Chen Qiao , Cao Quan Liang , Ji Kai , Liu Meng Yu , Peng Tao , Li Liang
Published: September 2013

A DC-excited high torque electromagnetic brake has been designed for high-speed train in WHMFC. An electromagnetic-thermal analysis model for electromagnetic brake analysis has been developed, taking into account the specific heat capacity-temperature relation, nonlinear magnetization-saturation and the skin effect. With simplification, the complex transient electromagnetic-thermal process has been successfully solved. This paper follows a previous work in which analysis was performed with electromagnetic analysis only.
A Study on the Clearance Decision of Fine Blanking Tool for Eco-Al Special Parts with Various Inner Corner Shapes
Authors: Kim Jong Deok , Heo Young Moo , Won Si Tae
Published: September 2013

Fine blanking is a press-working process that permits the production of precise finished components which are cleanly sheared through the whole cutting surface. It can be eliminated secondary operations, such as milling, grinding, etc. Recently, many studies on the weight reduction of automobile for fuel saving were underway. Especially, there are many examples in which light metal like Al were applied for automotive parts. Eco-Al is the new material which is replaced Mg of aluminum alloy with Mg+Al2Ca, therefore Eco-Al material has improved mechanical properties and formability. The clearance between the punch and die of a fine blanking tool is an important design factor that affects the sheared surface of a product. In a fine blanking process, the clearance is typically assigned a 0.5% material thickness. If the clearance is too big, a fractured surface would occur in the product while if it is too small, bulging would occur. In this study, a setting for optimum clearance was proposed for inner corner shapes by checking shear characteristics and bulging effects according to various clearances. After designing a special part with various corner shapes possessing Eco-Al5052 (thickness: 4 mm), a fine blanking tool was constructed and fine blanking experiments were conducted. The result could be usefully applied in fine blanking processes for Eco-Al automobile parts with corner shapes in the future.