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Full-Text Articles in Engineering
Electro-Tactile Feedback System For A Prosthetic Hand, Daniel Pamungkas, Koren Ward
Electro-Tactile Feedback System For A Prosthetic Hand, Daniel Pamungkas, Koren Ward
Faculty of Engineering and Information Sciences - Papers: Part A
Without the sense of touch, amputees with prosthetic hands can have difficulty holding and manipulating objects, especially when a task requires some degree of skill and tactile feedback to perform. To equip prosthetic hand users with touch sensing and tactile feedback, researchers have been experimenting with various types of force and/or tactile sensors together with various methods for delivering the tactile information to the brain. Although some success has been achieved recently with force sensors and implanted electrodes, these systems are expensive, surgically invasive and can represent an infection risk where cables emerge through the skin. Also, non-invasive tactile feedback …
A Variable Stiffness And Damping Suspension System For Trains, Shuaishuai Sun, Huaxia Deng, Weihua Li
A Variable Stiffness And Damping Suspension System For Trains, Shuaishuai Sun, Huaxia Deng, Weihua Li
Faculty of Engineering and Information Sciences - Papers: Part A
As the vibration of high speed train becomes fierce when the train runs at high speed, it is crucial to develop a novel suspension system to negotiate train’s vibration. This paper presents a novel suspension based on Magnetorheological fluid (MRF) damper and MRF based smart air spring. The MRF damper is used to generate variable damping while the smart air spring is used to generate field-dependent stiffness. In this paper, the two kind smart devices, MRF dampers and smart air spring, are developed firstly. Then the dynamic performances of these two devices are tested by MTS. Based on the testing …
Integrated Dehumidification And Downdraft Evaporative Cooling System For A Hot-Humid Climate, Sriraj Gokarakonda, Georgios Kokogiannakis
Integrated Dehumidification And Downdraft Evaporative Cooling System For A Hot-Humid Climate, Sriraj Gokarakonda, Georgios Kokogiannakis
Faculty of Engineering and Information Sciences - Papers: Part A
Unlike in hot-dry climates, in hot-humid climates evaporative cooling techniques are not readily suitable for space cooling. In order to effectively use evaporative cooling in hot-humid climates, dehumidification of ambient air is necessary before it passes over an evaporative medium for cooling. The present study explores the combined process of dehumidification and evaporation and its effect on thermal comfort in a typical small residential building located in a hot humid climate. A novel system has been investigated with the combination of an Earth Tube Ventilation (ETV) (for pre-cooling of air), a rotary wheel desiccant dehumidifier (for dehumidification) along with a …
System Implementation Of Self-Mixing Interferometry Technique-Based Measurement On Young's Modulus, Ke Lin, Yanguang Yu, Zhenghao Liu, Jiangtao Xi, Huijun Li, Cuiling Liu
System Implementation Of Self-Mixing Interferometry Technique-Based Measurement On Young's Modulus, Ke Lin, Yanguang Yu, Zhenghao Liu, Jiangtao Xi, Huijun Li, Cuiling Liu
Faculty of Engineering and Information Sciences - Papers: Part A
Young's modulus (denoted by E) is an intrinsic and valuable quantity for appropriate estimation of material performance. E can be obtained from the resonant frequency from the vibration of the tested material sample excited by the external forces. In this paper, we present a system design for determining the parameter by using an optical feedback self-mixing interferometry (OFSMI) system. An OFSMI system consists of a laser diode (LD), a micro-lens and an external target. The material sample to be tested is used as the external target. The vibration of the sample causes the variation of the length of the external …
Multi-Objective Ant Colony System For Data-Intensive Service Provision, Lijuan Wang, Jun Shen, Junzhou Luo
Multi-Objective Ant Colony System For Data-Intensive Service Provision, Lijuan Wang, Jun Shen, Junzhou Luo
Faculty of Engineering and Information Sciences - Papers: Part A
Data-intensive services have become one of the most challenging applications in cloud computing. The classical service composition problem will face new challenges as the services and correspondent data grow. A typical environment is the large scale scientific project AMS, which we are processing huge amount of data streams. In this paper, we will resolve service composition problem by considering the multi-objective data-intensive features. We propose to apply ant colony optimization algorithms and implemented them with simulated workflows in different scenarios. To evaluate the proposed algorithm, we compared it with a multi-objective genetic algorithm with respect to five performance metrics
Electro-Tactile Feedback System For Achieving Embodiment In A Tele-Operated Robot, Daniel Pamungkas, Koren Ward
Electro-Tactile Feedback System For Achieving Embodiment In A Tele-Operated Robot, Daniel Pamungkas, Koren Ward
Faculty of Engineering and Information Sciences - Papers: Part A
Tele-operation can enable an operator to control a robot remotely in inaccessible and hazardous environments. However, controlling a robot remotely via a conventional monitor and control panel can be difficult and slow. To achieve faster and more dexterous operation of the robot, enhanced 3D perception and some form of tactile or neural feedback is needed to achieve some degree of embodiment within the robot's physical structure and world. To achieve this objective we have devised an immersive tele-operation system comprised of a stereo vision headset and an electro-tactile feedback system that is worn by the operator, connected to stereo cameras …
Emerging Of Academic Information Search System With Ontology-Based Approach, Norasykin Mohd Zaid, Sim Kim Lau
Emerging Of Academic Information Search System With Ontology-Based Approach, Norasykin Mohd Zaid, Sim Kim Lau
Faculty of Engineering and Information Sciences - Papers: Part A
This paper describes the comparison of ontology development tools for development of academic information search system that assists inexperienced research students at a local university in Malaysia to search for academic resources in the local language context (Bahasa Malaysia). The cohort of inexperienced research students faces two main problems when using current system comprises of keyword search. Firstly the language barrier-limiting students' capabilities to conduct keyword search in foreign language (such as English). Secondly limited research experience in querying often results in obtaining irrelevant search results. The proposed semantic search system aims to apply ontology-based search to overcome the above …
Collaborative Learning Through Taas: A Mobile System For Courses Over The Cloud, Geng Sun, Jun Shen
Collaborative Learning Through Taas: A Mobile System For Courses Over The Cloud, Geng Sun, Jun Shen
Faculty of Engineering and Information Sciences - Papers: Part A
As mobile cloud-based learning gain wide acceptance, learners engaged in online courses have more opportunities to participate in virtual teams. In this paper we present a new system, Teamwork as a Service (TaaS), which is service-oriented and emphasizes on building a smart collaborative learning context in conjunction with cloudhosting learning management systems (LMSs). Each of the five services of TaaS aims to organize a certain type of refined learning activities, so as to join together to facilitate the whole collaborative learning process. The implementation details of TaaS are demonstrated, and some typical user interfaces (UIs) are illustrated about how TaaS …
Discovering Periodic Patterns In System Logs, Marcin Zimniak, Janusz R. Getta, Wolfgang Benn
Discovering Periodic Patterns In System Logs, Marcin Zimniak, Janusz R. Getta, Wolfgang Benn
Faculty of Engineering and Information Sciences - Papers: Part A
Historical information stored in the software system logs, audit trails, traces of user applications, etc. can be analysed to discover the patterns in periodic variations of levels and structures of the past workloads. These patterns allow for the estimation of intensities and structures of the future workloads. The correctly anticipated future workloads are used to improve performance of software systems through appropriate allocation of computing resources and through restructuring of associated system support. This work defines a concept of periodic pattern and presents the algorithms that find the periodic patterns in the traces of elementary and complex operations on data …
Multi-Phase Ant Colony System For Multi-Party Data-Intensive Service Provision, Lijuan Wang, Jun Shen
Multi-Phase Ant Colony System For Multi-Party Data-Intensive Service Provision, Lijuan Wang, Jun Shen
Faculty of Engineering and Information Sciences - Papers: Part A
The rapid proliferation of enormous sources of digital data has led to greater dependence on data-intensive services. Each service may actually request or create a large amount of data sets. To compose these services will be more challenging. Issues such as autonomy, scalability, adaptability, and robustness, become difficult to resolve. In order to automate the process of reaching an agreement among service composers, service providers, and data providers, an ant-inspired negotiation mechanism is considered in this paper. We exploit a group of agents automatically negotiating to establish agreeable service contracts. Twostage negotiation procedures are used in our data-intensive service provision …
A New Payment System For Enhancing Location Privacy Of Electric Vehicles, Man Ho Au, Joseph K. Liu, Junbin Fang, Zoe L. Jiang, Willy Susilo, Jianying Zhou
A New Payment System For Enhancing Location Privacy Of Electric Vehicles, Man Ho Au, Joseph K. Liu, Junbin Fang, Zoe L. Jiang, Willy Susilo, Jianying Zhou
Faculty of Engineering and Information Sciences - Papers: Part A
An electric vehicle (EV) is a promising and futuristic automobile propelled by electric motors, using electrical energy stored in batteries or another energy storage device. Due to the need for the battery to be recharged, the cars will be required to visit a recharging infrastructure very frequently. This may disclose the users' private information, such as their location and, thus, compromise users' privacy. In this paper, we propose a new payment system that is suitable for EVs. Our system not only supports privacy protection (location privacy) but supports traceability in the case where the cars are stolen as well. Our …
Water Reclamation From Shale Gas Drilling Flow-Back Fluid Using A Novel Forward Osmosis-Vacuum Membrane Distillation Hybrid System, Xue-Mei Li, Baolong Zhao, Zhongwei Wang, Ming Xie, Jianfeng Song, Long Nghiem, Tao He, Chi Yang, Chunxia Li, Ghang Chen
Water Reclamation From Shale Gas Drilling Flow-Back Fluid Using A Novel Forward Osmosis-Vacuum Membrane Distillation Hybrid System, Xue-Mei Li, Baolong Zhao, Zhongwei Wang, Ming Xie, Jianfeng Song, Long Nghiem, Tao He, Chi Yang, Chunxia Li, Ghang Chen
Faculty of Engineering and Information Sciences - Papers: Part A
This study examined the performance of a novel hybrid system of forward osmosis (FO) combined with vacuum membrane distillation (VMD) for reclaiming water from shale gas drilling flow-back fluid (SGDF). In the hybrid FO-VMD system, water permeated through the FO membrane into a draw solution reservoir, and the VMD process was used for draw solute recovery and clean water production. Using a SGDF sample obtained from a drilling site in China, the hybrid system could achieve almost 90% water recovery. Quality of the reclaimed water was comparable to that of bottled water. In the hybrid FO-VMD system, FO functions as …
A Novel Membrane Distillation-Thermophilic Bioreactor System: Biological Stability And Trace Organic Compound Removal, Kaushalya Wijekoon, Faisal Ibney Hai, Jinguo Kang, William Price, Wenshan Guo, Hao H. Ngo, Tzahi Cath, Long Nghiem
A Novel Membrane Distillation-Thermophilic Bioreactor System: Biological Stability And Trace Organic Compound Removal, Kaushalya Wijekoon, Faisal Ibney Hai, Jinguo Kang, William Price, Wenshan Guo, Hao H. Ngo, Tzahi Cath, Long Nghiem
Faculty of Engineering and Information Sciences - Papers: Part A
The removal of trace organic compounds (TrOCs) by a novel membrane distillation-thermophilic bioreactor (MDBR) system was examined. Salinity build-up and the thermophilic conditions to some extent adversely impacted the performance of the bioreactor, particularly the removal of total nitrogen and recalcitrant TrOCs. While most TrOCs were well removed by the thermophilic bioreactor, compounds containing electron withdrawing functional groups in their molecular structure were recalcitrant to biological treatment and their removal efficiency by the thermophilic bioreactor was low (0-53%). However, the overall performance of the novel MDBR system with respect to the removal of total organic carbon, total nitrogen, and TrOCs …
Analysis Of Subsynchronous Torsional Interaction Of Hvdc System Integrated Hydro Units With Small Generator-To-Turbine Inertia Ratios, Yin Chin Choo, Ashish Agalgaonkar, Kashem M. Muttaqi, Sarath Perera, Michael Negnevitsky
Analysis Of Subsynchronous Torsional Interaction Of Hvdc System Integrated Hydro Units With Small Generator-To-Turbine Inertia Ratios, Yin Chin Choo, Ashish Agalgaonkar, Kashem M. Muttaqi, Sarath Perera, Michael Negnevitsky
Faculty of Engineering and Information Sciences - Papers: Part A
The constant current controllers at high voltage direct current (HVDC) rectifier stations and the outer loops which set the reference to the current controller have potential to introduce negative damping on the nearby generating units. It is therefore vital to investigate the torsional interaction behavior between turbine-generator (TG) units and the HVDC systems over a frequency range of interest. In this paper, subsynchronous torsional interaction (SSTI) phenomenon for hydroelectric TG units with small generator-to-turbine inertia (GTI) ratios interconnected to an HVDC system has been investigated. The sensitivity of different system parameters, such as generating capacity and loading, DC power flow, …
A Mathematical Analysis Of A Membrane Bioreactor Containing A Sludge Disintegration System, Mark Nelson, Thomas Yue
A Mathematical Analysis Of A Membrane Bioreactor Containing A Sludge Disintegration System, Mark Nelson, Thomas Yue
Faculty of Engineering and Information Sciences - Papers: Part A
The activated sludge process is widely used to treat domestic and industrial wastewater. A significant drawback of this process is the production of "sludge", the disposal of which can comprise a significant proportion of the total operating costs of a wastewater treatment plant. We analyze the steady-state operation of a membrane bioreactor system (MBR) incorporating a sludge disintegration unit (SDU) to reduce sludge production. We provide a qualitative understanding of the model by finding analytically the steady-state solutions of the model and determining its stability as a function of the residence time. In practice a target value of the mixed …
Total Electron Scattering Cross Sections For Pyrimidine And Pyrazine As Measured Using A Magnetically Confined Experimental System, M Fuss, A Sanz, Francisco Blanco, J C. Oller, Paulo Limao-Vieira, M J. Brunger, Gustavo García
Total Electron Scattering Cross Sections For Pyrimidine And Pyrazine As Measured Using A Magnetically Confined Experimental System, M Fuss, A Sanz, Francisco Blanco, J C. Oller, Paulo Limao-Vieira, M J. Brunger, Gustavo García
Faculty of Engineering and Information Sciences - Papers: Part A
In this paper, a recently constructed apparatus for measuring electron scattering cross sections while applying a strong axial magnetic field is utilized for determining total scattering cross sections. The first molecules studied with this setup are pyrimidine (1,3-diazine) and pyrazine (1,4-diazine), whose total cross sections are obtained for the incident electron energy range of 8-500 eV. Quite good agreement with earlier theoretical predictions is found after accounting for the angular acceptance (angular resolution for forward scattering) of the apparatus. However, no other experimental total cross sections for electron scattering from pyrimidine or pyrazine have been found in the literature for …
Panoptes: Calibration Of A Dosimetry System For Eye Brachytherapy, Michael Weaver, Marco Petasecca, Dean Cutajar, Michael L. F Lerch, Gianluigi De Geronimo, Donald Pinelli, Ashley Cullen, Dale A. Prokopovich, Vladimir Perevertaylo, Anatoly B. Rosenfeld
Panoptes: Calibration Of A Dosimetry System For Eye Brachytherapy, Michael Weaver, Marco Petasecca, Dean Cutajar, Michael L. F Lerch, Gianluigi De Geronimo, Donald Pinelli, Ashley Cullen, Dale A. Prokopovich, Vladimir Perevertaylo, Anatoly B. Rosenfeld
Faculty of Engineering and Information Sciences - Papers: Part A
Intraocular cancer is a serious threat to the lives of those that suffer from it. Dosimetry for eye brachytherapy presents a significant challenge due to the inherently steep dose gradients that are needed to treat such small tumours in close proximity to sensitive normal structures. This issue is addressed by providing much needed quality assurance to eye brachytherapy, a novel volumetric dosimetry system, called Panoptes was developed. This study focuses on the preliminary characterisation and calibration of the system. Using ion beam facilities, the custom, pixelated silicon detector of Panoptes was shown to have good charge collection uniformity and a …
Control Issues Of Distribution System Automation In Smart Grids, Kashem M. Muttaqi, Ali Esmaeel Nezhad, Jamshid Aghaei, Velappa Ganapathy
Control Issues Of Distribution System Automation In Smart Grids, Kashem M. Muttaqi, Ali Esmaeel Nezhad, Jamshid Aghaei, Velappa Ganapathy
Faculty of Engineering and Information Sciences - Papers: Part A
In recent years, the world has been exposed to many developments in different areas esp. computer technology, resulting in computers with high power of processing to be built. Among these devices, intelligent electronic devices (IEDs) have the capability to process considerable volume of data at high speed. Since, real-time data processing is vital in distribution networks as the largest users during their operation, IEDs would be applicable in such systems. In addition to IEDS, communication systems have improved during recent decades, providing the desired conditions for a concept known as distribution system automation (DSA) which has been discussed in this …
Computer Vision Based Traffic Monitoring System For Multi-Track Freeways, Zubair Iftikhar, Prashan Premaratne, Peter James Vial
Computer Vision Based Traffic Monitoring System For Multi-Track Freeways, Zubair Iftikhar, Prashan Premaratne, Peter James Vial
Faculty of Engineering and Information Sciences - Papers: Part A
Nowadays, development is synonymous with construction of infrastructure. Such road infrastructure needs constant attention in terms of traffic monitoring as even a single disaster on a major artery will disrupt the way of life. Humans cannot be expected to monitor these massive infrastructures over 24/7 and computer vision is increasingly being used to develop automated strategies to notify the human observers of any impending slowdowns and traffic bottlenecks. However, due to extreme costs associated with the current state of the art computer vision based networked monitoring systems, innovative computer vision based systems can be developed which are standalone and efficient …
Ropes Eye Plaque Dosimetry: Commissioning And Verification Of An Ophthalmic Brachytherapy Treatment Planning System, J Poder, N Annabell, M Geso, M Alqathami, S Corde
Ropes Eye Plaque Dosimetry: Commissioning And Verification Of An Ophthalmic Brachytherapy Treatment Planning System, J Poder, N Annabell, M Geso, M Alqathami, S Corde
Faculty of Engineering and Information Sciences - Papers: Part A
In this study, the Plaque SimulatorTM eye plaque brachytherapy planning system was commissioned for ROPES eye plaques and Amersham Health model 6711 Iodine 125 seeds, using TG43-UI data. The brachytherapy module of the RADCALC® independent checking program was configured to allow verification of the accuracy of the dose calculated by Plaque SimulatorTM. Central axis depth dose distributions were compared and observed to agree to within 2% for all ROPES plaque models and depths of interest. Experimental measurements were performed with a customized PRESAGEm 3-D type dosimeter to validate the calculated depth dose distributions. Preliminary results have shown the effect of …
Resonance Forever In A Rotational System: The Infinite Viv Lock-In Regime For Pivoted Cylinders, Brad Stappenbelt, Andrew Dennis Johnstone
Resonance Forever In A Rotational System: The Infinite Viv Lock-In Regime For Pivoted Cylinders, Brad Stappenbelt, Andrew Dennis Johnstone
Faculty of Engineering and Information Sciences - Papers: Part A
The aim of the present investigation was to examine the critical vortex-induced vibration (VIV) point for cylinders in a rotational system. For translational systems, the existence of a critical mass ratio for cylinders undergoing vortex-induced vibration has been well established. At mass ratios below this critical point, the reduced velocity at VIV lock-out tends to infinity, resulting in the resonance forever condition as described by the authors first reporting this phenomenon. The approach adopted in the present investigation involved measuring the VIV response of a positively buoyant pivoted cylinder being towed at very high reduced velocity. High reduced velocity was …
Teamwork As A Service: A Cloud-Based System For Enhancing Teamwork Performance In Mobile Learning, Geng Sun, Jun Shen
Teamwork As A Service: A Cloud-Based System For Enhancing Teamwork Performance In Mobile Learning, Geng Sun, Jun Shen
Faculty of Engineering and Information Sciences - Papers: Part A
Although cloud computing helps learners to access online learning content through commonly used devices, it can be difficult to collaborate in the mobile environment. We develop a service-oriented system, ‘Teamwork as a Service’ (TaaS), to facilitate learners’ team learning activities. The five main services of TaaS facilitate a teamwork-enhanced learning flow associated with the theory of Kolb’s team learning experience, providing learners with an introduction, a ‘jigsaw classroom’, schedule planning, and mutual supervision during the whole process. Specifically, TaaS enables a rational grouping mechanism that allocates learners to their appropriate tasks in order to give their best performance. TaaS is …
Facilitating Collaborative Learning In Taas: A Mobile Cloud System For Enhancing Teamwork Performance, Geng Sun, Jun Shen
Facilitating Collaborative Learning In Taas: A Mobile Cloud System For Enhancing Teamwork Performance, Geng Sun, Jun Shen
Faculty of Engineering and Information Sciences - Papers: Part A
Mobile cloud-based learning is a novel trend that brings many advantages to distributed learners to achieve collaborative learning, but it still lacks of mechanisms to enhance their teamwork performances. To make up that shortcoming, combining the features of cloud environment, we have identified a learning flow, a specification of workflow, based on Kolb team learning experience. This novel learning flow can be executed by our newly designed system, Teamwork as a Service (TaaS), in conjunction with cloud-hosting learning management systems, following which learners benefit from functions given by cloudbased services, separately for organizing cloud jigsaw classroom, planning and publishing tasks, …
Total Electron-Scattering Cross Sections From Pyrimidine As Measured Using A Magnetically Confined Experimental System, Martina C. Fuss, Ana G. Sanz, Francisco Blanco, Juan Carlos Oller, Paulo Limao-Vieira, Michael J. Brunger, Gustavo Garcia
Total Electron-Scattering Cross Sections From Pyrimidine As Measured Using A Magnetically Confined Experimental System, Martina C. Fuss, Ana G. Sanz, Francisco Blanco, Juan Carlos Oller, Paulo Limao-Vieira, Michael J. Brunger, Gustavo Garcia
Faculty of Engineering and Information Sciences - Papers: Part A
In this paper, an apparatus for measuring electron-scattering cross sections while applying a strong axial magnetic field is described. The first original experiment performed with this setup is the measurement of the total cross sections for pyrimidine (1,3-diazine), which are presented for the incident electron energy range of 8-500 eV. Generally good agreement with earlier theoretical predictions is found after accounting for the angular acceptance (angular resolution for forward scattering) of the apparatus.
Validation Of An Imrt Beam Model Using A Secondary Treatment Planning System As A 3d Dosimeter, A Xing, S Arumugam, L Holloway, G Goozee
Validation Of An Imrt Beam Model Using A Secondary Treatment Planning System As A 3d Dosimeter, A Xing, S Arumugam, L Holloway, G Goozee
Faculty of Engineering and Information Sciences - Papers: Part A
A treatment planning system IMRT beam model is usually validated using phantom-based measurement, however this will not detect errors related to patient anatomy and inhomogeneity. In this study a secondary treatment system (CMS XIO) was used as a 3D dosimeter to verify an IMRT beam model recently commissioned in a Philips Pinnacle treatment planning system. Data sets from three head-neck and two prostate patients previously treated were utilised. The IMRT plans for these patients were planned in Pinnacle and transferred to XIO. The dose at each voxel in the patient volume was calculated in both XIO and Pinnacle. The 2D …
Innovations Of The Assessment System In Introductory Statistics Subject, Norhayati Baharun, Anne Porter
Innovations Of The Assessment System In Introductory Statistics Subject, Norhayati Baharun, Anne Porter
Faculty of Engineering and Information Sciences - Papers: Part A
This paper presents the results of a study investigating the innovations in the assessment system implemented in an introductory statistics subject (STAT131) at the University of Wollongong (UOW). For several years, innovations have been introduced to STAT131 particularly in the assessment system. These included the approaches of assignments, summary and mid-session test in 2003; assignments, laboratory work and midsession test from 2004 to 2005; four tests and three make-up tests in 2006; six tests with three compulsory and two optional tests in 2007; four tests (the best of three test marks were chosen) and opportunity to re-sit the tests in …
Reliability Modeling And Analysis For A Novel Design Of Modular Converter System Of Wind Turbines, Cai Wen Zhang, Tieling Zhang, Nan Chen, Tongdan Jin
Reliability Modeling And Analysis For A Novel Design Of Modular Converter System Of Wind Turbines, Cai Wen Zhang, Tieling Zhang, Nan Chen, Tongdan Jin
Faculty of Engineering and Information Sciences - Papers: Part A
Converters play a vital role in wind turbines. The concept of modularity is gaining in popularity in converter design for modern wind turbines in order to achieve high reliability as well as cost-effectiveness. In this study, we are concerned with a novel topology of modular converter invented by Hjort, Modular converter system with interchangeable converter modules. World Intellectual Property Organization, Pub. No. WO29027520 A2; 5 March 2009, in this architecture, the converter comprises a number of identical and interchangeable basic modules. Each module can operate in either AC/DC or DC/AC mode, depending on whether it functions on the generator or …
Novel Modulation And Control Strategy For Five-Level Anpc Converter With Unbalanced Dc Voltage Applied To A Single-Phase Grid Connected Pv System, Hamid R. Teymour, Danny Sutanto, Kashem M. Muttaqi, Phil Ciufo
Novel Modulation And Control Strategy For Five-Level Anpc Converter With Unbalanced Dc Voltage Applied To A Single-Phase Grid Connected Pv System, Hamid R. Teymour, Danny Sutanto, Kashem M. Muttaqi, Phil Ciufo
Faculty of Engineering and Information Sciences - Papers: Part A
This paper proposes a new control strategy and a novel modulation technique for a grid-connected photo-voltaic (PV) system using a single-phase five-level flying capacitor (FC) based active-neutral-point-clamped (ANPC) converter. The proposed modulator can control the FC voltage to follow the requested reference value and simultaneously generate the required ac output voltage regardless of the values of the dc capacitor voltages of the converter. By implementing this method, smaller values of dc-link and flying capacitors can be used even in applications that could experience ripple or transient in the capacitors voltage. In the grid-connected single-phase five-level ANPC, where the capacitors can …
Ontology-Based Search System Using Hierarchical Structure Design, Norasykin Mohd Zaid, Sim Kim Lau, Mohd Nihra Haruzuan Mohamad Said
Ontology-Based Search System Using Hierarchical Structure Design, Norasykin Mohd Zaid, Sim Kim Lau, Mohd Nihra Haruzuan Mohamad Said
Faculty of Engineering and Information Sciences - Papers: Part A
Major retrieval issues on conventional online database search systems faced by novice researchers are identified and described. An ontology-based search framework is proposed. The framework consists of five elements: (1) user, (2) query, (3) query interface, (4) search process, and (5) result. The query interface is designed based on the ontology hierarchical structure in the ontology datastore and is represented as keywords/sub-keywords structures in the query interface. Ontology enables relationships between keywords and terms to be defined. Ontology allows desired information to be retrieved by sharing common vocabularies with an understanding of meaning of terms in the domain. A prototype …
A Multi Agent System Based Implementation For Semantic Web Services, J Shen, G Beydoun, G C. Low
A Multi Agent System Based Implementation For Semantic Web Services, J Shen, G Beydoun, G C. Low
Faculty of Engineering and Information Sciences - Papers: Part A
Many information systems developers face high cost in adopting service oriented architectures because of the high cost of locating appropriate services to customise and integrate into their system. This paper aims at reducing this cost by automating much of the composition and service selection effort. It illustrates the use of a Peer-Peer multi agent system (MAS) to facilitate service selection with multiple Quality of Service properties. The system will use semantic enrichment of services in order to facilitate their identification and composition. With semantic driven composition, services can be shared between teams of developers and across multiple organisations connected via …