bluuebunny/crossref_metadata_2025 huggingface dataset:
Research Development of Energy Efficient Water Hydraulics Manipulator for Underwater Application
Authors: Yusof Ahmad Anas , Wasbari Faizil , Ibrahim Mohd Qadafie
Published: September 2013

This paper presents research development of water hydraulicsmanipulator testrig for underwater application at Centre for AdvancedResearch on Energy, Faculty of Mechanical Engineering, Universiti Teknikal Malaysia Melaka. The test rig is designed in order to study the effectiveness of using water hydraulics system for underwater manipulation application. With objectives to promote sustainability and energy saving, the manipulator system is targeted for usage in an underwater scenario, possibly on small submarines or underwater remotely operated vehicles (ROVs).Underwater vehicles normally utilize the use of oil hydraulics for propulsion, manipulation and instrument control. The research on underwater manipulator that uses the surrounding sea water itself as the power and energy carrier for control is now possible with the current development in water hydraulics technology.
Theoretical and Experimental Analysis of Double Layer Quintuple Solar Oven
Authors: Solihin Zainoor Hailmee , Wirachman Wisnoe , Noriah Yusoff , Wan Mohammad Wan Sulaiman
Published: September 2013

Solar cookers or solar ovens are devices that use sunlight as their energy source. These devices are primarily used for heating purposes. A double layer quintuplet solar oven was researched; the objectives were to study performances of the solar oven in harvesting sunlight to reach the highest temperature and heat storage, and to compare theoretical models against actual experimental data. The solar oven was fabricated using glass panels and supported by a trolley for mobility. The solar oven in-field testing was set at 08:00 to 18:00 hours to ensure maximum exposure to daytime direct sunlight, thus maximum heat captured. A temperature sensor (thermocouple) was used to measure the temperature changes inside the oven. A XR440 Pocket Logger was connected to the sensor to record the measured temperature on an hourly basis. The experimental data were then collated and presented in a graphical format to visualize the trend. A numerical analysis based on theoretical modeling was done to compare with the experimental data which was affected by actual weather conditions. The experimental data showed that the maximum temperature captured inside the solar oven was 80°C. In principle, the temperature inside the solar oven will increase proportionately to the increments of the solar radiation from sunlight. This experimental study concluded that the maximum heat gained by this double layer quintuplet solar oven was 80°C or at solar irradiance value of 578.04W/m2. This experimental irradiance value when compared against the irradiance value calculated based on the theoretical model shows a variance of 8.44%. This parametric research study is worth exploring further as a research frontier in alternative sustainable energy in Malaysia. Similar research by other scholars reported that the solar oven will function effectively as a cooking device if the solar irradiance heat generated inside it is more than 800W/m2. With this finding, a further enhancement can be made to the oven design to improve the maximum heat gain.
Effect of Two-Cycle Heat Treatment on Mechanical Properties of Ductile Iron
Authors: Abdullah B. , Idham M. F. , Jaffar A. , Zubair Ahmad Faiz , Mohamed M.
Published: September 2013

The aim of this study is to investigate the mechanical properties of ductile iron after treatment with two-cycle heat treatment processes which modified from austempering. The modified heat treatments have two stages holding temperature. Ductile iron was austenitized at 900 °C for an hour and followed by transferring the sample to other furnace which was set at different temperatures of i) 250 °C; ii) 300 °C; iii) 350 °C without quenching for 1.5 hours. Tensile (ASTM E8M), impact (ASTM-E23-1990) and Rockwell hardness tests were carried out to study the mechanical properties of the ductile iron. It was found that the sample which was heat treated using two-cycle heat treatment process at temperature of 250 °C contributed to better absorbing impact energy properties and hardness properties. Meanwhile, sample that heat treated at 350 °C has higher tensile strength.
Numerical Investigation of Temperature Distribution in a Diffuser Equipped with Helical Tape
Authors: Wisnoe Wirachman , Shukri Ehan Sabah , Zailani Ramlan , Che Mi Mohd Hafizie , Zakaria Muhamad Fairul
Published: September 2013

The effect of helical tape inside a conical diffuser on the temperature distribution is examined. In the present paper helical tape with different pitches (20 mm, 25 mm, and 30 mm) and different tape geometries (H=10mm, 15mm) with the same pitch (30mm) are studied in order to observe their effect on the temperature distribution. The length of diffuser, inlet diameter, outlet diameter, and the divergent angle are kept constant for all pitches of tape. The analysis is carried out using CFD software using k-ε turbulence model. The results show that small pitch gives better distribution of temperature, and increasing tape height improves the distribution in the radial-tangential direction.
A Unified Adaptive Fanger's Model for Thermal Comfort in Tropical Countries
Authors: Pau Jion Sean , Pao William K.S.
Published: September 2013

Thermal comfort, which used to be a luxury in life has transformed into a necessity in modern lives. Tropical country such as Malaysia has hot and humid climate all year round. Much air conditioning is required in tropical countries to provide thermal comfort for indoor occupants. Fangers model is deterministic as it regards the heat fluxes across the boundary between humans and their thermal environment. Fangers model is adopted by ASRHAE Standard 55 in 1992 but it has over-predicted thermal preferences of those living in tropics. Malaysians who are used to hot and humid climates prefer warmer indoor temperature, as hypothesized in adaptive model. Adaptive model is said to predict thermal comfort more accurately than Fangers model as it relates the indoor comfortable temperature to outdoor air temperature. The objective of this research is to integrate the adaptive theories into Fangers model and to synthesize a new thermal comfort model which is expected to accurately predict thermal comfort in tropical countries. As the adaptive theory says that not all peoples thermal preferences are affected by thermal histories and contextual factors, the new model has proposed a broader operation range of PMV for air conditioner. The increment of PMV range from ±1.0 to ±1.17 for 80% satisfaction requirement is proved to applicable in Malaysia.
Study on the Use of Micro-Perforated Panel to Improve Acoustic Performance in Mosque
Authors: Putra Azma , Hafizah D. , Yaakob M.Y. , Mohd Nor Mohd Jailani
Published: September 2013

Most activities in mosque such as Friday prayer and the sermon by an Imam require clarity of speech. Unfortunately, this speech intelligibility performance is often poor due to initial design of a mosque. This paper presents assessment of the indoor acoustics of a mosque. Acoustical properties such as reverberation time, clarity and early decay time are obtained from simulation data using CATT indoor acoustic software. The study started with an empty mosque with no acoustic treatment. Acoustic green absorbers using micro-perforated panel (MPP) are then introduced to improve the acoustic performance. The application of MPP is still rare for mosque and is expected to replace the typical porous absorber. The effect of the panel size, location and frequency range of sound absorption are simulated and the results are discussed.
A Study on Effect of Intelligent Speed Adaptation (ISA) to Bus Drivers
Authors: Zamakhshari N.M. Hanif , Makhtar Ahmad Khushairy , Ramli M. Hanif
Published: September 2013

ntelligent Speed Adaptation (ISA) is a system that constantly monitors vehicle speed, local speed limit on a road and implements an action such as giving warning or discourages the drivers when the vehicle is detected to be exceeding the speed limit. A GPS connected to digital speed map allows Intelligent Speed Adaptation technology to continuously update the vehicle speed limit to the road speed limit. The main purpose of this project is to study the speed profile and effect on drivers psychology on Intelligent Speed Adaptation to bus drivers before and after the intervention of ISA technology. An experiment was conducted on GPS-ISA instrument involving about 20 respondents of Universiti Teknologi MARA (UiTM) Shah Alam Campus bus drivers from various backgrounds. The instrument used to collect data is GPS-ISA device. The data gained from GPS-ISA device is speed profile to specify the speeding and speed variation. To evaluate drivers psychology, a set of questionnaire was designed. The data gained from questionnaire are attention level, stress level, and ISA acceptance level. The result of total differences for all 20 respondents between the average speed before and after the intervention for Zone 1 to Zone 5 was-8.95 km/h. For drivers psychology results, most of the respondents are willing to use ISA system if given a chance. Majority of respondents did not felt any stress and distraction while driving by using ISA system. For conclusion, the ISA system proved to be efficiently reduced speed of busses in UiTM Shah Alam campus zone and can be used as an initiative in order to assist bus drivers to reduce speed of vehicles especially in campus zone.
Stress Concentration Factors in Auxetic Rods and Plates
Authors: Lim Teik Cheng
Published: September 2013

Auxetic materials are solids that possess negative Poissons ratio. Although rare, such materials do occur naturally and also have been artificially produced. Due to their unique properties, auxetic materials have been extensively investigated for load bearing applications including in biomedical engineering and aircraft structures. This paper considers the effect of Poissons ratio on the stress concentration factors on rods with hyperbolic groove and large thin plates with circular holes and rigid inclusions. Results reveal that the use of auxetic materials is useful for reducing stress concentration in the maximum circumferential stress of the rods with grooves, and in plates with circular holes and rigid inclusions. However, the use of auxetic materials increases the stress concentration in the axial direction of the rod. Therefore a procedure to accurately select and/or design materials with precise negative Poissons ratio for optimal design is suggested for future work.
Researches on Thermo-Electric Properties of Seawater and Al2O3 Nanofluids
Authors: Wang Jung Chang , Chiang Wen Chou
Published: September 2013

The article utilizes thermo-electric performance experiments to study four fixed volume kinds of electrolytes (Tap Water, Mineral Water, Sea Water, and Al2O3 Nanofluids) under different operating temperatures, distances and areas of electrodes due to the impact of the output currents. The experimental results showed that the rise in operating temperature will significantly affect the magnitude of the output current because of heat convection inside the fluid. And the output current of the seawater was much larger than those of the nanofluids, tap water and mineral water between 27 °C and 90 °C. Its maximum value was up to 4.2 mA. However, the seawater presented unstable for output current. The Al2O3 nanofluids had the most stable among them and its output current was about 1.08 mA. If seawater combined with Al2O3 nanoparticles, they will be able to achieve a complementary role in the future development.
The Periodic Solution and Numerical Simulations for Iced Cable System
Authors: Li Jing , Ran Yan Ping , Yin Xiao Na , Chen Li Hua
Published: September 2013

In this paper, the periodic behavior of iced cable in the case of the in-plane fundamental parametric resonance-principal resonance, out-of-plane principal parametric resonance-principal resonance, and in 1:2 internal resonances is investigated. The sufficient condition for the existence of the periodic solutions about the system is obtained through using Melnikov function and Poincare mapping, then the stability of periodic solution is investigated by using blow-up transformations and the average method. Numerical simulations are performed to verify the analytical predictions and get three groups of diagrams.
Uncoupled Dynamic Thermal Stress Distribution on the Section of a Flow Channel Occupied Filling Medium
Authors: Liu Jie , Jia Xiao Ling , Chai Neng Qiang
Published: September 2013

Throught translation and rotation method of coordinate axis, a problem of the dynamic thermal stress distribution on the two-dimensional section of a flow channel occupied filling medium was studied theoretically. A general analytical solution with related computional process was described in detailed. As an illustration sample, some numberical results are shown in the figure about the dynamical thermal stress distribution on the section of an elliptic flow channel occupied filling medium.
Effect of Ball Milling on Structure of Microcrystalline Cellulose
Authors: Su Si Ting , Xiong Jian , Ye Jun
Published: September 2013

The main objective of this work was investigate the effect of ball milling on microcrystalline cellulose (MCC) structure. FTIR results shows there are no obvious different in the function groups of between neat and ball milling MCC. Both FTIR and WAXD analysis indicate that the crystalline of MCC samples are change with the ball milling time. The WAXD results also show MCC change from typical cellulose IV to amorphous state when ball milled for 6h, and after 30h the characteristic shape ball milling transformed into cellulose II.
Second-Order Proportional Modification Parameters for Spiral Bevel Gears Manufactured by Spread Blade Method
Authors: Huang Deng Hong , Wang Zhi Yong , Yu Shui Qin
Published: September 2013

The proportional modification parameters are useful for compensating the tooth form errors of spiral bevel gears. Based on the mathematical model for calculating the machine setting parameters and according to the relative position relationship between cutter and workpiece, the formulae for calculating the second-order proportional modification parameters for gears manufactured by spread blade method was deduced by the curvature and normal vector at calculation point. The proportional modification parameters can make the lengthwise curvature or profile curvature or lengthwise twist curvature of the concave and convex flank produce uniform change or difference change. The formulae is verified by experiment on CNC spiral bevel gear grinding machine and M&M sigma 7 gear measuring center.
Optical Characteristics of WO3 Thin Films Prepared Using the Electrodeposition Method
Authors: Teng Tun Ping , Lin Li , Yu Chao Chieh
Published: September 2013

The tungsten oxide (WO3) thin films on the indium tin oxide (ITO) glass in this study were produced by applying the electrodeposition method (ED). This method involves adjusting ED time to control the structure, film thickness, and morphology of WO3thin films. Furthermore, the crystallization of the WO3thin films was controlled by annealing them at 200 °C and 500 °C. The results show that the WO3coated glass with non-annealed and annealed at 200 °C has a high transmittance of visible light and anti-infrared characteristics. However, the WO3coated glass annealed at 500 °C has high infrared transmittance, with the highest infrared transmittance reaching 85% at the 1000 nm wavelength. To improve the heat collecting efficiency of solar water heaters, the high infrared WO3coated glass can be applied to the surface of the heat collecting component.
The Residential Intelligent Power Consumption Management System
Authors: Wu Yan , Wang Li Fang , Liao Cheng Lin
Published: September 2013

Because of lacking of effective management and various energy-saving measures, a family smart power management system is introduced. The system includes the servers, LAN and smart power management terminal; the system can control the equipment to achieve the scientific management, and provide users a platform to interact with electrical equipment; the user can use the phone , PAD, PC and other mobile devices log the specified smart power management service website anytime, anywhere to control the electrical household electrical household appliances and query the power consumption, also can control the electrical household electrical household appliances at home through the smart power management terminal. According to the test of the system, the performances verify the system can effectively improve the power consumption rate, and achieve a good energy saving effect.
Energy and Economic Comparison of Different Conditioning System among Traditional and Eco-Sustainable Building
Authors: Franzitta V. , Milone D. , Trapanese M. , Viola A. , Di Dio V. , Pitruzzella S.
Published: September 2013

The use of bioclimatic principles can reduce energy demands and CO2 emissions in the building sector [1-. Costs are one of the most important barriers to a widespread adoption of the green architecture technologies [4-. The aim of this study is to compare the energy and economic performances of two buildings: a real residential bioclimatic building located in Cinisi (a small town near Palermo, Sicily) and an imaginary residential building supposed having the same geographical location, cubature, shape and orientation as the bioclimatic building but built by conventional building materials. The tools used for this study were TRNSYS and HOMER
Urban Waste as Resource for Sustainable Environment
Authors: Milone Angelo , Milone Daniele , Campione Francesco Claudio , Pitruzzella Salvatore
Published: September 2013

The emerging model of waste disposal, develops an integrated approach based on waste reduction, selection, recycling, energy recovery and residual use of landfill. Here we discuss the fundamentals of a proper planning of waste disposal system, specially the thermal recovery, the integration and the methodological approach, either from the environmental and economic point of view.
The growing demand for energy, the resulting environmental problems due to satisfy the demand for energy and the complex-economic system, necessitate the study of new technologies such as energy from municipal solid waste (MSW) obtaining as a result of decrease huge mass of solid waste to sanitary landifill and emissions of landifill gas as (CH4 and CO2 ).
Therefore, we propose to validate a technical, economical and environmental analysis of waste-treatment systems with enphasis on generation of energy.
The recovery of heat from a waste-to-energy plant, can make a useful contribution to the city energy needs. Whilst we have been slow to exploit fully this resource in Sicily, economically in urban areas.
Finite Element Simulation Analysis of Reinforced Concrete Aqueduct
Authors: Tan Min
Published: September 2013

Aqueduct is a important water conveyance buildings, this paper adopts finite element method to carry out three-dimensional finite element simulation analysis for Songxijiang reinforced concrete rectangle beam-supported aqueduct. Researching variation law of the aqueducts stress and displacement in construction process and operational process. Analysis results show that, structure of Songxijiang reinforced concrete rectangle beam-supported aqueduct is reasonable, force of aqueduct structure is explicit, it meets the requirements for engineering.
Research on Structure Force of Clay Core Wall Stone Slag Dam
Authors: Liu Ke Ding
Published: September 2013

The dam is a important structure in hydraulic key project, this paper adopts universal finite element calculation software to carry out three-dimensional finite element simulation analysis for clay core wall stone slag dam of Fushengqiao reservoir. Computer is fully used in calculation process, researching variation law of the dams stress and displacement in construction process and operational process. The research results offer some reference for design and construction of clay core wall stone slag dam.
Design of Neural Network Controller for Space Robot with Flexible Manipulators
Authors: Ma Jing , Zhang Wen Hui , Zhu Zhi Hua
Published: September 2013

Neural network self-learning optimization PID control algorithm is put forward for free-floating space robot with flexible manipulators. Firstly, dynamics model of space flexible robot is established, then, neural network with good learning ability is used to approach non-linear system. Optimization algorithm of network weights is designed to speed up the learning speed and the adjustment velocity. Error function is offered by PID controller. The neural network self-learning PID control method can improve the control precision.
Region Merging Based Segmentation with Cellular Automaton
Authors: Gao Yong Hui , Wang Sheng Zheng , Yang Jie
Published: September 2013

Since fully automatic image segmentation on natural images is usually hard to provide guaranteed results, interactive scheme with a few simple user inputs becomes a good alternative. This paper presents a novel interactive method based on regional attacking and merging mechanism within a cellular automaton (CA) framework. With an attacking rule based on regions maximal similarity, the adjacent homogeneous
regions that are initialized by pre-segmentation are automatically merged and labeled, the users only need to indicate the object and background regions with rough markers. The whole process neednt set any similarity threshold in advance and the desired contours are effectively extracted by labeling all the non-marker regions as either background or object. Extensive experiments are performed and the results show that the proposed scheme can reliably extract the object contours from the complex background.
Robust Control Analysis Techniques Applied to a Mini Aircraft
Authors: Ibarra R. , Rodríguez W. , Florida S. , Romero Gerardo , Lara D. , Pegard C. , Abdelhamid R.
Published: September 2013

This paper presents a methodology for the development of an UAV Autopilot System, based on modeling, instrumentation and a control law, with the purpose of stabilizing the airplane attitude. Firstly, were made experimental test flights by manual control for obtaining the longitudinal model parameters using the Matlab toolbox called "System Identification Tool". The model is represented by a transfer function of the pitch angle with respect to the elevator into an open-loop system. The system is stabilized using a PD controller (derivative-proportional) tuned with poles placement method. The zero exclusion principle is used to compute the robustness margin of the closed-loop system. Different experiments were made in order to validate theoretical results which are presented at the end of this work.
A Design of Multi-Band UHF Sensor for Partial Discharge Detection
Authors: Liu Bin , An Jing De , Zhang Wei Dong , Xu You Lin
Published: September 2013

The selection and design of the sensor is one of the key technologies for UHF PD detection. The UHF sensors popular used in PD detection and location in substation are partial discharge UHF sensor are usually ultra wideband antenna in the frequency range of 200 MHz to 1.5 GHz, which contains interference from communication signals. Accordingly, in order to improve the detection sensitivity and the signal-to-noise ratio, a kind of multi-band UHF narrowband sensor is proposed and designed in accordance with the principles of the loop antenna for PD detection. The proposed frequency resonant bands are set in the ranges of 480MHz-520MHz, 800MHz-850MHz and 1.1GHz-1.2GHz. The design based on simulation is finished and the performances of the prototype sensor are researched by parametric test and PD detection of three typical discharges: corona discharge, surface discharge and metallic particles discharge generated by PD mode. Results show that the selection of band for the UHF sensor is reasonable, and the sensor is with high sensitivity.
Experimental Study on a Piezoelectric Energy Generator Excited by Rotating Magnets
Authors: Huang Fang Sheng , Kan Jun Wu , Jin Xian Fang , Fu Jia Wei , Fan Chun Tao
Published: September 2013

To meet the demand of rotating mechanism for self-powered monitoring system, piezoelectric energy generator (PEG) excited by the magnetic coupling force between rotating magnets fixed on a rotator and those fixed on piezo-beam was presented. The influence of magnetic force (number and configuration of the magnets) and rotating speed on energy generation of the PEG was investigated experimentally. The research results show that there are several optimal rotating speeds for the PEG to achieve peak voltage at speed range of 0 to 1390r/min. Under a given number of magnets fixed on the end of the piezo-beam, the peak voltages rise with the increasing of rotating magnets number and rotating speed. At 636r/min, the achieved peek voltages from the PEG with 1/2/4 rotating magnets are 12.1/15.2/20.0V respectively. Besides, the configuration modes of rotating magnets and the fixed magnets (repulsion, attraction, or repulsion-attraction) exert great influence on the peak voltage and the relative optimal rotating speeds. Taking a PEG with 2 rotating magnets for example, the 4th peek voltages and the relative optimal rotating speeds for the PEG under exciting mode of repulsion/attraction//repulsion-attraction are 12.6/15.0/16.4 V and 552/528/492 r/min respectively.
Decoding Improvement for LT Codes
Authors: Wang Li Na , Tang Wei
Published: September 2013

In this paper the performance of LT codes is analyzed. And then, for the remaining part of information which can be decoded still exists when decoding failure, an improved message passing decoding algorithm which retains the original algorithm framework is proposed. The simulation results have shown that the improved message passing decoding algorithm improves the decoding rate and reduces decoding overhead on the premise of appropriately increasing decoding complexity.
Thermocouple Sensor Influence on Temperature Field in SMA Actuator
Authors: Drahoš Peter , Kutiš Vladimír , Lenický Róbert
Published: September 2013

The paper deals with thermal analysis, modeling and simulation of the Shape Memory Alloy (SMA) actuator with temperature sensor. Because the capabilities of analytical description of SMA system are limited, numerical simulations of model have to be performed. Two different numerical models are investigated - lumped and continuous model. Simple parametric lumped model of actuator thermal field is developed in order to describe thermal field at the measuring point. The characteristic parameters of the lumped model are set up according to continuous coupled electric-thermal model made in ANSYS FEM program.
Topology Optimization Design of Bars Structure Based on SKO Method
Authors: Li Wen Jun , Zhou Qi Cai , Zhang Xu Hui , Xiong Xiao Lei , Zhao Jiong
Published: September 2013

There are less topology optimization methods for bars structure than those for continuum structure. Bionic intelligent method is a powerful way to solve the topology optimization problems of bars structure since it is of good global optimization capacity and convenient for numerical calculation. This article presents a SKO topology optimization model for bars structure based on SKO (Soft Kill Option) method derived from adaptive growth rules of trees, bones, etc. The model has been applied to solve the topology optimization problem of a space frame. It uses three optimization strategies, which are constant, decreasing and increasing material removed rate. The impact on the optimization processes and results of different strategies are discussed, and the validity of the proposed model is proved.
Research on Auto Cover Drawing Die Design BASED on NX
Authors: Xia Yong Qing , Zheng Gong Liang
Published: September 2013

According to characters of auto covering parts such as large size, thin thickness, complexity in shape, low degree of standardization and expressed by model, etc. This paper put forward the drawing die design process of auto covering parts based on NX software. The assembly drawing of the auto covering part drawing die was shown in detail. In accordance to the mold design process, the digitized model was parametrically designed. The competitiveness of the auto covering part mold manufacturing enterprises was significantly improved with the application of 3D mold dynamic simulation s and automatic forming line simulation.
Study on Mould Design with NX Based on Knowledge Reuse Technology
Authors: Wang Bin , Gu Chun Rong , Zhang Jia Nan , Shi Yi Hong
Published: September 2013

Mould design is a complex process which mainly uses fixed design process or design approach. It has certain similarity or repeatability. In order to avoid duplication of effort and improve the efficiency of the mould design, present a mould design method based on NX knowledge reuse technology, establish the standard parts library, so as to realize the target of high-quality, short-cycle and low-cost in mould design. At last, the mobile phone shell mould design example is given to verify the feasibility and practicability of the mould design based on NX knowledge reuse technology.
Business-Task Coupled Process Management for Complex Product Simulation
Authors: Wang Hai Wei , Liu Geng , Yang Zhan Duo
Published: September 2013

Business process and professional simulation process are closely relative and alternate together for complex product simulation. This paper presents a business-task coupled process management method, which can implement integration management of business process and professional simulation process. Business-task coupled process is controlled by a multilayer workflow engine based on workflow technology. When the business process executes a task activity, the responding task process will be driven. The workflow engine controls every simulation activity in the task process. A simulation activity invokes one specified simulation tool and transfers data through a simulation component. The application result shows the validity of the method.
Unified Product Data in Transmission System Development
Authors: Han Bing , Liu Geng , Li Yang , Yang Xiao Hui
Published: September 2013

Property of transmission system will directly influence the performance and reliability of helicopters. Information exchange and sharing are difficult in transmission system life-cycle, which has complex product to fabricate and mass information to handle. To solve this problem, we establish a unified product data (UPD) to manage the information of research-development process for transmission system. In distributed collaborative environment, a single enterprise UPD is established by analysing transmission system development process and data flow. The theoretical frame of UPD and several key techniques are studied, including architecture, model, management, consistency, and mapping of data access control. Data integration and data access control model in development process is discussed in this paper. A UPD integration framework based on collaborative agent is presented, which shows the evolvement theory among PUPD, DUPD, SUPD and IUPD. Besides, task-role-based access control model is proposed, and dynamic right control process is given for UPD.
Development of a Dynamic Stability Simulator for Articulated and Conventionaltractors Useful for Real-Time Safety Devices
Authors: Mazzetto Fabrizio , Bietresato Marco , Vidoni Renato
Published: September 2013

The safety of agricultural tractors drivers is a very actual topic, especially when tractors operate on side slopes, such as in terraced vineyards. This work approaches the stability problem of articulated tractors by modelling, simulating and quantifying the safety of the driver with respect to both roll and pitch overturns. First of all, an articulated tractor has been modelled and simplified, after that a stability index has been defined and calculatedin several simulated slope conditions when the tractor travels along a circular trajectory; then, the obtained results have beencompared with respect to a conventional tractor. This work is a preliminary studyfor a tilting test platform for real vehicles, capable to reproduce real field conditions (slope, obstacles, roughness). Finally, some directives on how exploiting the obtained results for real-time safety devices have been formulated.
Research on Algorithm of Vision-Based Night Visibility Estimation
Authors: Dai Pang Da , Zhang Yu Jun , Wang Jing Li , Lu Chang Hua , Zhou Yi , Liu Jing
Published: September 2013

Accurately achieve the luminance of light sources at night images is significantly important to vision-based night visibility estimation. In this paper, we propose a practical night visibility algorithm. This algorithm contains two main parts, light sources recognition and edge extraction. Firstly, we give the model of vision-based visibility estimation, and propose the framework of algorithm. Secondly, we give the method to extract light sources from multiple potential targets by the prior knowledge of space information. Then, we analysis the features of light source image, and explain the expanded temple to cut sub-image of light source, and induce in PS level set to segment the edge. Experiments show that, the light source average recognition precision is approach to 0.95 at the condition of moderate breeze, and compared with the manual segment, the precision of light source segment is approach to 0.99 at the condition of real visibility larger than 500m.
A Generalized Auxiliary Equation Method for the Quadratic Nonlinear KG Equation
Authors: Zhang Sheng , Xu Bo , Peng Ao Xue
Published: September 2013

A generalized auxiliary equation method with symbolic computation is used to construct more general exact solutions of the quadratic nonlinear Klein-Gordon (KG) equation. As a result, new and more general solutions are obtained. It is shown that the generalized auxiliary equation method provides a more powerful mathematical tool for solving nonlinear partial differential equations arising in the fields of nonlinear sciences.
The Improvement and Development of Slicing and Shredding Machine Function
Authors: Zhang Gong Li , Yang Hui , Pan Shi Ping , Mo Jian Feng , Jiao Fei
Published: September 2013

Slicing and shredding machine is a kind of food processing machinery, and is widely used in food processing industry, but its function is limited. In order to realize the multifunction of the machine, the machine is improved and developed, driven by a gear and clutch to achieve multifunctional operations, improved its effect.
Estimation of Air Pollutant Emissions in “Turbo” and in Conventional Roundabouts
Authors: Corriere Ferdinando , Rizzo Gianfranco , Guerrieri Marco
Published: September 2013

The road pollutant emissions, above all in urban context, are correlated to many infrastructural parameters and to traffic intensity and typology. The research work on road junction geometry, carried out in European research centres, has recently allowed to design new road intersection types which are of undoubted interest, especially in terms of traffic functionality and safety, like the turbo roundabouts (in which right-turn manoeuvres do not conflict with the circulating flow). The main objective of this paper is to propose a model for the estimation the performances and the pollutant emissions into turbo roundabouts. A comparative analysis between conventional roundabout and turbo roundabout has been carried out in terms of CO, CO2, CH4, NO, PM2,5 and PM10 vehicular emissions, evaluated by mean of COPERT Software which is developed as a European tool for the calculation of emissions from the road transport sector.
Research on Mathematical Model of Liquid-Continuous Impinging Streams
Authors: Li Fu Bao , Sha Wei , Li Qin
Published: September 2013

Aiming at sufficiently recognizing and optimally designing the flow structure of impinging stream, and accommodating theoretical basis with the improvement and innovation of processing equipment, this dissertation researched the mathematical model of Liquid-continuous impinging streams. It, primarily, established the mathematical model of Liquid-continuous impinging streams through analyzing the physical characteristics of flow field of Liquid-continuous impinging streams.Then it obtained the locus function, velocity function and pressure function of Liquid-continuous impinging streams though solving equation of the model.Finally it made a numerical simulation about Liquid-continuous impinging streams by using CFD software.The result of numerical simulation and the analysis about flow characteristic suggests that the mathematical model established by this paper is appropriate for describing the flow field of Liquid-continuous impinging streams.
Study on Dispersion Behavior of Al2O3/ZrO2 Composite Powder
Authors: Xu Jing , Chen Min
Published: September 2013

nanocomposite used widely with the development of nanotechnology, and the dispersion of different composition is important. ZrO2 often used as the second phase to improve the toughness of Al2O3 ceramics[1,. nanoAl2O3 and ZrO2 are added to water to prepare suspension, and PVP was used as dispersant to improve the dispersion of suspension. The suspension of Al2O3 and ZrO2 adjusted from 2 to 11 with the addition of dispersant is 0.5%. The flocculation of suspension was observed after 3h, 6h, 12h and 24h. Result shows that two kinds suspension dispersant better in acid liquid than in alkaline and natural liquid. The pH values that are choose as the best dispersion and flocculation are 5 and 7. Morphology and element distribution of composite powder are tested in the SEM. Results show that the composite powder is finely disseminated.
Study of the Surface Integrity of Powder-Metallurgy High-Speed Steel (S390) Multi-Cut by Wire Electrical Discharge Machining
Authors: Zha Xiang , Cao Chuan Liang , Zhang Xiang Lin , Feng Ji Jun
Published: September 2013

The surface integrity of powder metallurgical high speed steel (S390) cut by wire electrical discharge machining (WEDM) has a great influence on the its fatigue life. In this paper, a study focused on surface integrity including white layer, surface finish, retained austenite, carbide and residual stress changed with multi-cutting has been described. Scanning electron microscopy (SEM), X-ray diffraction (XRD) and energy dispersive spectrograph (EDS) analysis were performed in the examination of the evolution of surface integrity. The experimental results reveal that the surface roughness, micro-cracks, white layer thickness and surface residual stress decrease with the increase of cutting pass, but the amount of retained austenite in the resolidified layer of the surface after the second cutting pass is the highest, compared with the other cutting passes. The content of carbides increases with the cutting pass and few carbides appear in the top section of the white layer of the first two cutting passes.
The Research on Milling Force in High-Speed Milling Nickel-Based Superalloy of Inconel 718
Authors: Zhao Can , Liu Yu Bo
Published: September 2013

This paper makes an experiment in high-speed milling of Inconel 718. Cutting tests were performed using round and ceramic tools, at feeds from 0.06 to 0.14 mm/tooth, Axial Depth of Cut from0.5 to 1.5mm,and cutting speeds ranging from 500 to 1037 m/min. The behaviour of the cutting forces during machining was then measure. The results show that cutting force increases first and then decreases with the increase of feed per tooth, the tool chipping and groove wear were found with the increase of axial cutting depth, and cutting force is increased; the increase in cutting force with the cutting speed increases, when the cutting speed reaches a critical speed, the cutting force as the cutting speed increases began to decline.
Electroplated Diamond Wire Saw Applying Ultrasonic Vibration to Cut Polysilicon Experiment and Simulation Analysis
Authors: Zhang Liao Yuan , Wang Shuo , Shao Zhong Qing , Lv Zhong Xiu
Published: September 2013

In this paper, on the basis of a large number of literature at home and abroad are summarized, we used the complete with independent intellectual property rights ultrasound wire-cutting processing machine tool to carry out machining experiment , and the ultrasonic wire cutting mechanism and process was carried out in-depth study. The results showed: compared with ordinary sawing, the cutting efficiency of applying ultrasonic action was high, its cutting force and surface roughness was small, at the same time ,used the software of ABAQUS finite element simulation analysis, and further studied on the law of electroplated diamond wire saw ultrasonic vibration cutting of composite processing technology process.
Effect of the Vibration on Machining Gap of WEDM
Authors: Sun Peng
Published: September 2013

The effect of the lateral vibration of the electrode wire on machining gap of CNC was analyzed. Then the vibration mathematical model of the wire electrode was established, and the influence of various parameters on the vibration and machining gap was revealed. Taking 1 mm wire as example, the influence low of the parameters on vibration of wire electrode was obtained. It shows that the vibration model is correct, to provide a reference for optimizing the machining gap of CNC.
Research of Composite Coating Composed of Mo Wire and High-Cr Cast Iron Made by Laser Cladding Technology
Authors: Zhang Wei
Published: September 2013

The experiments of laser cladding on the surface of H13 steel were made. Molybdenum (Mo) wire and high-chromium (Cr) cast iron powder were used as cladding material. The microstructure and hardness of laser cladding layer were studied. The experiments showed that Mo wire and high-Cr cast iron cladding layer had better properties such as minute crystals, high density, no crack, no gas cavity and good metallurgical bonding with base metal. There was a slight melting on the surface of Mo wire which would greatly increase the binding force between Mo wire and high-Cr cast iron. Mo wire could make grain refine and limit the growing of carbide. The average hardness of junction zone of Mo wire and high-Cr cast iron was 750HV0.2 which was higher than that of cladding zone composed of high-Cr cast iron (650HV0.2).
Welding Quality Controlling by Describing the Shape of Weld Joint of Pipeline Steel through Computer Software
Authors: Zhao Ji Dong
Published: September 2013

The relationship between welding quality and the shape of weld joint of pipeline steel and the factors which can make large influence over the shape of weld joint is analyzed in this paper. The pictures of weld joint in all kinds of welding conditions are taken into computer by some special ways in order to the pictures can be used to producing mathematic curves of weld joint shape. Welding quality and the shape of weld joint of pipeline steel can be forecasted and controlled by finding the best mathematic curve among all the curves which are fitted from the pictures of the weld joint of pipeline steel in all kinds of welding conditions by the computer software.
Design of Novel Integrated Heating and Riveting Control System for TB2 Titanium Alloy Rivet
Authors: Yu Xiao , Zhang De Yin
Published: September 2013

A novel integrated heating and riveting control system for TB2 titanium alloy rivet based on the precise heating temperature and the heating time control is designed in this paper. The novel heating and riveting control system is implemented by using a linear current sensor to measure primary side current of output transformer of the control system so as to determine heating temperature, and using a microcontroller to precisely control heating time. Comparing to the difficult heating temperature control of the traditional rivet heating system of which heating time is controlled by time relay, our novel control system has implemented precise heating temperature control by precise heating time control and heating current control. The experimental results show the heating time error of rivet heater of this research is less than 0.1 second, and the novel control system is more reliable, convenient and accuracy than that traditional one controlled by time relay. The actual production results show required riveting temperature can be attained accurately under the condition of working voltage even with ±10% fluctuation, and the novel control system brings to increase the rate of finished products of riveted TB2 titanium alloy rivet about 15%.
The Design of Power Supply with Feed-Forward Control Method for EBW
Authors: Wei Shou Qi , Liu Zhi Jie , Zhu Si Si , Su Zhen Yuan , Li Ming , Chen Xu
Published: September 2013

A kind of accelerating power supply device for electronic beam welder was introduced in this paper. The device adopts PWM modulation method, use IGBT as DC chopper. M, N two groups of H inverse bridge parallel with each other compose the inverter. Intermediate frequency AC produced by inverter was sent into intermediate frequency high voltage transformer, after the high voltage rectifying and filtering, the high voltage output running steadily. In order to improve the power supply devices output characteristics when power system fluctuates or load changes, feed-forward control strategy was introduced. Use the control method that feed-forward combining with feed-back. The experiments show that the adjusting speed of this power supply device is fast, the output voltage ripple is small, the technical indicators can meet high welding technology for electron beam welding machine.
Metal Transfer Behavior of Consumable DE-GMAW
Authors: Zhu Ming , Fan Ding , Shi Yu , Zhou Hai
Published: September 2013

Consumable double-electrode gas metal arc welding (consumable DE-GMAW) is a novel and high efficient welding method. According to the different polarity of two electrodes in consumable DE-GMAW, the metal transfer behaviors are analyzed by using the state force balance theory. For main torch with direct current electrode positive polarity, the arc root area is enlarged by bypass arc and increased electromagnetic force promotes main metal transfer. For bypass torch with direct current electrode negative polarity, the electromagnetic force does not work on the melting area. Only gravity force is major detaching force. The volume of bypass droplet is large and not easily detache to the weld pool.
Multi-Input Multi-Output Control of Consumable DE-GMAW
Authors: Zhu Ming , Shi Yu , Fan Ding , Zhou Hai
Published: September 2013

A novel and high efficient consumable double-electrode gas metal arc welding (consumable DE-GMAW) method has been introduced. Because of the coupled welding parameters, a multi-input multi-output (MIMO) control scheme was proposed and tested, which controlled the bypass arc by adjusting the bypass wire feed speed, and controlled the base metal current by adjusting the bypass current. Then, the welding experiment has been carried out. The results showed that the MIMO control scheme was effective. The base metal current was controlled at a nearly constant level and the welding process was stable. Also a good weld appearance was obtained.
Influence of Scanning Speed on Microstructure and Hardness during Laser Cladding High-Cr Cast Iron
Authors: Zhang Wei
Published: September 2013

The experiments of laser cladding on the surface of 20 steel were made. High-chromium (Cr) cast iron powder was used as cladding material. The microstructure and hardness of laser cladding layers under different scanning speed were studied. The experiments showed that high-Cr cast iron cladding layer had better properties such as minute crystals, high density, no crack, no gas cavity and good metallurgical bonding with base metal. When the scanning speed was low, such as 10mm/min, the microstructure of cladding layer was cellular dendrite. There were much carbide with the shape of fish-bone distributing among cellular grains. Under higher scanning speed (from 100mm/min to 300mm/min), needle-shaped primary cementite would come into being. When laser scanning speed was 500mm/min, the carbide of cladding zone was very thin. With the increasing of laser scanning speed, the average hardness of cladding zone increased from 388HV0.2 to 580 HV0.2.