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Articles 1 - 30 of 457
Full-Text Articles in Social and Behavioral Sciences
Energy Exchange Between Electric Vehicle Load And Wind Generating Utilities, Ahmad Tavakoli, Michael Negnevitsky, Duc Thanh Nguyen, Kashem M. Muttaqi
Energy Exchange Between Electric Vehicle Load And Wind Generating Utilities, Ahmad Tavakoli, Michael Negnevitsky, Duc Thanh Nguyen, Kashem M. Muttaqi
Faculty of Engineering and Information Sciences - Papers: Part A
This paper proposes a novel approach to energy exchange between electric vehicle (EV) load and wind generation utilities participating in the day-ahead energy, balancing, and regulation markets. An optimal bidding/offering strategy model is developed to mitigate wind energy and EV imbalance threats, and optimize EV charging profiles. A new strategy model is based on optimizing decision making of a wind generating company (WGenCO) in selecting the best option among the use of the balancing or regulation services, the use of the energy storage system (ESS) and the use of all of them to compensate wind power deviation. Energy imbalance is …
Development And Optimization Of An Innovative Hvac System With Integrated Pvt And Pcm Thermal Storage For A Net-Zero Energy Retrofitted House, Massimo Fiorentini, Paul Cooper, Zhenjun Ma
Development And Optimization Of An Innovative Hvac System With Integrated Pvt And Pcm Thermal Storage For A Net-Zero Energy Retrofitted House, Massimo Fiorentini, Paul Cooper, Zhenjun Ma
Faculty of Engineering and Information Sciences - Papers: Part A
This paper describes a novel solar-assisted HVAC system developed for the Team UOW 'Illawarra Flame' Solar Decathlon house, the winner of the Solar Decathlon China 2013 competition. This HVAC system consists of an air-based photovoltaic-thermal (PVT) collector and a phase change material (PCM) thermal storage unit integrated with a reverse cycle heat pump, in a ducted system. The system was designed for operation during both winter and summer using daytime solar radiation and night-time sky radiative cooling, respectively. The PVT collector heats or cools fresh air from ambient and thereby provides heating or cooling either directly to the indoor space, …
A Distributed Broadcast Algorithm For Duty-Cycled Networks With Physical Interference Model, Dianbo Zhao, Kwan-Wu Chin
A Distributed Broadcast Algorithm For Duty-Cycled Networks With Physical Interference Model, Dianbo Zhao, Kwan-Wu Chin
Faculty of Engineering and Information Sciences - Papers: Part A
Broadcast is a fundamental operation in multi-hop wireless networks. Given a source node with a message to broadcast, the objective is to propagate the message to all nodes in an interferencefree manner while incurring minimum latency. This problem, called Minimum-Latency Broadcast Scheduling (MLBS), has been studied extensively in wireless networks whereby nodes remain on all times and has been shown to be NP-hard. However, only a few studies have addressed this problem in the context of duty-cycled wireless networks, which unfortunately, remains NP-hard. In these networks, nodes do not wake up simultaneously, and hence, not all neighbors of a transmitting …
Behaviour Of Perforated Gfrp Tubes Under Axial Compression, Weiqiang Wang, M Neaz Sheikh, Muhammad N. S Hadi
Behaviour Of Perforated Gfrp Tubes Under Axial Compression, Weiqiang Wang, M Neaz Sheikh, Muhammad N. S Hadi
Faculty of Engineering and Information Sciences - Papers: Part A
This study investigates the influences of various parameters on the behaviour of perforated Glass Fibre Reinforced Polymer (GFRP) tubes under axial compression. A total of 15 GFRP tubes with and without perforations were tested under axial compression. All the GFRP tubes were divided into two groups: 12 tubes with 89 mm outer diameter and 6 mm wall thickness and 3 tubes with 183 mm outer diameter and 8 mm wall thickness. The influences of hole diameter, vertical hole spacing, tube diameter, perforation pattern, transverse hole spacing, and hole reinforcement on the axial compressive behaviour of perforated GFRP tubes were experimentally …
Performance Monitoring: Case Studies Of Tracks Stabilised By Geosynthetic Grids And Prefabricated Vertical Drains, Buddhima Indraratna, Sinniah K. Navaratnarajah, Sanjay Nimbalkar, Cholachat Rujikiatkamjorn, Tim Neville
Performance Monitoring: Case Studies Of Tracks Stabilised By Geosynthetic Grids And Prefabricated Vertical Drains, Buddhima Indraratna, Sinniah K. Navaratnarajah, Sanjay Nimbalkar, Cholachat Rujikiatkamjorn, Tim Neville
Faculty of Engineering and Information Sciences - Papers: Part A
This paper focusses on assessing the performance of rail track through field trials conducted in the towns of Bulli, Singleton, and Sandgate in the state of New South Wales, Australia. In Bulli and Singleton, different types of geosynthetics (geogrid, geotextile and geocomposite) were installed to investigate their relative advantages in relation to various aperture sizes and types of subgrade. A key objective of this study was to evaluate the effect of these artificial inclusions on the vertical and lateral track deformation as the largescale laboratory tests provided evidence that grids reduce particle breakage by restraining the movement of aggregates and …
Design Of Earth Retaining Structures And Tailing Dams Under Static And Seismic Conditions, S S. Nimbalkar, D Choudhury
Design Of Earth Retaining Structures And Tailing Dams Under Static And Seismic Conditions, S S. Nimbalkar, D Choudhury
Faculty of Engineering and Information Sciences - Papers: Part A
In this paper the seismic active earth pressure is determined by using pseudo-dynamic method. Mononobe-Okabe method by pseudo-static approach gives the linear distribution of seismic earth pressure behind retaining wall in an approximate way. A rigid vertical retaining wall supporting cohesionless backfill material with horizontal ground has been considered in the analysis with planar rupture surface. Results highlight the non-linearity of seismic earth pressures distribution. Applications of pseudo-dynamic method for stability assessment of gravity dams and tailing dams are presented. A new simplified method to include soil arching effect on determination of earth pressures is also proposed.
Geotechnics Of Granular Materials For Railways And Port Reclamation, Buddhima Indraratna, Sanjay Nimbalkar, Ana Heitor
Geotechnics Of Granular Materials For Railways And Port Reclamation, Buddhima Indraratna, Sanjay Nimbalkar, Ana Heitor
Faculty of Engineering and Information Sciences - Papers: Part A
Rail is one of the largest transportation modes offering freight and passenger traffic in rapidly developing nations, including India. Concerted efforts to improve productivity, modernization and technology upgrading have led to an impressive growth in railways and port infrastructure. Large-scale physical modelling and full-scale field monitoring often provide significant knowledge to better understand performance and to extend the current state-of-the-art in design of rail and port. A series of large-scale laboratory tests were conducted to analyse behaviour of granular materials (ballast, sub-ballast) under cyclic and impact loads. Effectiveness of using geosynthetic grids, geocells and shock mats was also studied. Comprehensive …
Using Diffusion Of Innovation Theory To Understand The Factors Impacting Patient Acceptance And Use Of Consumer E-Health Innovations: A Case Study In A Primary Care Clinic, Xiaojun Zhang, Ping Yu, Jun Yan, Ir Ton A M Spil
Using Diffusion Of Innovation Theory To Understand The Factors Impacting Patient Acceptance And Use Of Consumer E-Health Innovations: A Case Study In A Primary Care Clinic, Xiaojun Zhang, Ping Yu, Jun Yan, Ir Ton A M Spil
Faculty of Engineering and Information Sciences - Papers: Part A
Background Consumer e-Health is a potential solution to the problems of accessibility, quality and costs of delivering public healthcare services to patients. Although consumer e-Health has proliferated in recent years, it remains unclear if patients are willing and able to accept and use this new and rapidly developing technology. Therefore, the aim of this research is to study the factors influencing patients' acceptance and usage of consumer e-health innovations. Methods A simple but typical consumer e-health innovation - an e-appointment scheduling service - was developed and implemented in a primary health care clinic in a regional town in Australia. A …
Privacy-Preserving Ciphertext Multi-Sharing Control For Big Data Storage, Kaitai Liang, Willy Susilo, Joseph K. Liu
Privacy-Preserving Ciphertext Multi-Sharing Control For Big Data Storage, Kaitai Liang, Willy Susilo, Joseph K. Liu
Faculty of Engineering and Information Sciences - Papers: Part A
The need of secure big data storage service is more desirable than ever to date. The basic requirement of the service is to guarantee the confidentiality of the data. However, the anonymity of the service clients, one of the most essential aspects of privacy, should be considered simultaneously. Moreover, the service also should provide practical and fine-grained encrypted data sharing such that a data owner is allowed to share a ciphertext of data among others under some specified conditions. This paper, for the first time, proposes a privacy-preserving ciphertext multi-sharing mechanism to achieve the above properties. It combines the merits …
An Analysis Of A Standard Reactor Cascade And A Step-Feed Reactor Cascade For Biological Processes Described By Monod Kinetics, Harvinder S. Sidhu, Mark Ian Nelson, Easwaran Balakrishnan
An Analysis Of A Standard Reactor Cascade And A Step-Feed Reactor Cascade For Biological Processes Described By Monod Kinetics, Harvinder S. Sidhu, Mark Ian Nelson, Easwaran Balakrishnan
Faculty of Engineering and Information Sciences - Papers: Part A
We analyse the steady-state operation of two types of reactor cascade without recycle. The first is a standard reactor cascade in which the feed stream enters into the first reactor. The second is a step-feed reactor cascade in which an equal proportion of the feed stream enters each reactor in the cascade. The reaction is assumed to be a biological process governed by Monod growth kinetics with a decay coefficient for the microorganisms. The steady-states of both models are found for an arbitrary number of reactors and their stability determined as a function of the residence time. We show that …
Valuation Of Options On Oil Futures Under The 3/4 Oil Price Model, Mohammed A. Aba Oud, Joanna Goard
Valuation Of Options On Oil Futures Under The 3/4 Oil Price Model, Mohammed A. Aba Oud, Joanna Goard
Faculty of Engineering and Information Sciences - Papers: Part A
Recently, an empirically-validated one-factor model with a 3/4-power diffusion term was introduced in the literature to model oil prices and value futures contracts on oil. In this paper, we provide an exact and analytic approximation for European call option prices on futures under a 3/4-power futures model. The analytic approximation, valid for short times to expiry is then calibrated to market prices. Results from the calibration show that the analytic approximation formula outperforms current popular options on futures formulae in capturing market prices.
Models For Predicting The Axial Compressive Strength Of Steel Fibre Reinforced Normal And High Strength Concrete Square Columns, Emdad K. Z Balanji, M Neaz Sheikh, Muhammad N. S Hadi
Models For Predicting The Axial Compressive Strength Of Steel Fibre Reinforced Normal And High Strength Concrete Square Columns, Emdad K. Z Balanji, M Neaz Sheikh, Muhammad N. S Hadi
Faculty of Engineering and Information Sciences - Papers: Part A
Over the last three decades, fibre has been commonly used in reinforced concrete (RC) columns to enhance their strength and ductility. In the available studies on Steel Fibre Reinforced Concrete (SFRC) columns, axial compressive strength of the columns is expressed as functions of unconfined concrete compressive strength and the lateral confinement pressure. In this study, available experimental investigation results of the axial compressive strength of SFRC square columns have been compiled. This study also proposes axial compressive strength models of the SFRC square columns using artificial neural network (ANN). In the proposed models, axial compressive strength of SFRC columns has …
Tension And Compression Testing Of Fibre Reinforced Polymer (Frp) Bars, Qasim S. Khan, M Neaz Sheikh, Muhammad N. S Hadi
Tension And Compression Testing Of Fibre Reinforced Polymer (Frp) Bars, Qasim S. Khan, M Neaz Sheikh, Muhammad N. S Hadi
Faculty of Engineering and Information Sciences - Papers: Part A
Corrosion of reinforcement in steel Reinforced Concrete (RC) columns significantly decreases both the strength and ductility of RC columns. Fibre Reinforced Polymer (FRP) bars have emerged as an attractive alternative to the traditional steel bars because of higher ultimate tensile strength to weight ratio and higher corrosion resistance of the FRP bars. However, Standard test methods for different types of FRP bars both in tension and compression have not been fully developed. This study presents the results of tension and compression tests of circular pultruded Glass FRP (GFRP) bars and Carbon FRP (CFRP) bars of 15 mm and 15.9 mm …
Confining Concrete Cover Of Gfrp Tube Reinforced Concrete Columns With Polymer Grids, Weiqiang Wang, M Neaz Sheikh, Muhammad N. S Hadi
Confining Concrete Cover Of Gfrp Tube Reinforced Concrete Columns With Polymer Grids, Weiqiang Wang, M Neaz Sheikh, Muhammad N. S Hadi
Faculty of Engineering and Information Sciences - Papers: Part A
This study presents the results of an experimental investigation on the behaviour of glass fibre reinforced polymer (GFRP) tube reinforced concrete columns under axial compression. The polymer grids were embedded into the concrete cover of glass fibre reinforced polymer (GFRP) tube reinforced concrete columns to reduce the spalling of concrete cover. A total of four column specimens were prepared and tested under axial compression. The columns were 150 mm in diameter and 300 mm in height. The first column was the reference column without any reinforcement. The second column was reinforced with GFRP tube without cover confinement. For the third …
Tweeting Propaganda, Radicalization And Recruitment: Islamic State Supporters Multi-Sided Twitter Networks, Akemi Takeoka Chatfield, Christopher G. Reddick, Uuf Brajawidagda
Tweeting Propaganda, Radicalization And Recruitment: Islamic State Supporters Multi-Sided Twitter Networks, Akemi Takeoka Chatfield, Christopher G. Reddick, Uuf Brajawidagda
Faculty of Engineering and Information Sciences - Papers: Part A
Islamic State (IS) terrorist networks in Syria and Iraq pose threats to national security. IS' exploitation of social media and digital strategy plays a key role in its global dissemination of propaganda, radicalization, and recruitment. However, systematic research on Islamic terrorist communication via social media is limited. Our research investigates the question: How do IS members/supporters use Twitter for terrorism communication: propaganda, radicalization, and recruitment? Theoretically, we drew on microeconomic network theories to develop a theoretical framework for multi-sided Twitter networks in the global Islamic terrorist communication environment. Empirically, we collected 3,039 tweets posted by @shamiwitness who was identified in …
Quantum Oblivious Set-Member Decision Protocol, Run-Hua Shi, Yi Mu, Hong Zhong, Shun Zhang
Quantum Oblivious Set-Member Decision Protocol, Run-Hua Shi, Yi Mu, Hong Zhong, Shun Zhang
Faculty of Engineering and Information Sciences - Papers: Part A
We present and define a privacy-preserving problem called the oblivious set-member decision problem, which allows a server to decide whether a private secret of a user is a member of his private set in an oblivious manner. Namely, if the secret belongs to his private set, he does not know which member it is. We propose a quantum solution to the oblivious set-member decision problem. Compared to classical solutions, the proposed quantum protocol achieves an exponential reduction in communication complexity, since it only needs O(1) communication cost.
Two Quantum Protocols For Oblivious Set-Member Decision Problem, Run-Hua Shi, Yi Mu, Hong Zhong, Jie Cui, Shun Zhang
Two Quantum Protocols For Oblivious Set-Member Decision Problem, Run-Hua Shi, Yi Mu, Hong Zhong, Jie Cui, Shun Zhang
Faculty of Engineering and Information Sciences - Papers: Part A
In this paper, we defined a new secure multi-party computation problem, called Oblivious Set-member Decision problem, which allows one party to decide whether a secret of another party belongs to his private set in an oblivious manner. There are lots of important applications of Oblivious Set-member Decision problem in fields of the multi-party collaborative computation of protecting the privacy of the users, such as private set intersection and union, anonymous authentication, electronic voting and electronic auction. Furthermore, we presented two quantum protocols to solve the Oblivious Set-member Decision problem. Protocol I takes advantage of powerful quantum oracle operations so that …
Benefits Of Online Health Education: Perception From Consumers And Health Professionals, Khin Than Win, Naffisah Mohd Hassan, Andrew Bonney, Donald Iverson
Benefits Of Online Health Education: Perception From Consumers And Health Professionals, Khin Than Win, Naffisah Mohd Hassan, Andrew Bonney, Donald Iverson
Faculty of Engineering and Information Sciences - Papers: Part A
With the advancement in technology and availability of the Internet, online health education could become one of the media for health education. As health education is to persuade patients on health behavioural change, understanding perceived benefits of online health education is an important aspect to explore. The aim of this study is to explore consumers and health professionals opinion on online health education. Literature review was conducted and identified the benefits of online health education (OHE). Survey was conducted to health consumers and health professionals. Descriptive analyses were performed using SPSS Version 19.0. The analysis of the literature has identified …
Bio-Inspired Cost-Aware Optimization For Data-Intensive Service Provision, Lijuan Wang, Jun Shen, Junzhou Luo
Bio-Inspired Cost-Aware Optimization For Data-Intensive Service Provision, Lijuan Wang, Jun Shen, Junzhou Luo
Faculty of Engineering and Information Sciences - Papers: Part A
The use of Big Data and the development of cloud computing have led to greater dependence on data-intensive services. Each service may actually request or create a large amount of data sets. The scope, number, and complexity of data-intensive services are all set to soar in the future. To compose these services will be more challenging. Issues of autonomy, scalability, adaptability, and robustness, become difficult to resolve. Bio-inspired algorithms can overcome the new challenging requirements of data-intensive service provision. It is useful for the provision of data-intensive services to explore key features and mechanisms of biological systems and accordingly to …
Adaptively Secure Identity-Based Broadcast Encryption With A Constant-Sized Ciphertext, Jongkil Kim, Willy Susilo, Man Ho Au, Jennifer Seberry
Adaptively Secure Identity-Based Broadcast Encryption With A Constant-Sized Ciphertext, Jongkil Kim, Willy Susilo, Man Ho Au, Jennifer Seberry
Faculty of Engineering and Information Sciences - Papers: Part A
In this work, we present an adaptively secure identity-based broadcast encryption system featuring constant sized ciphertext in the standard model. The size of the public key and the private keys of our system are both linear in the maximum number of receivers. Also, our system is fully collusion-resistant and has stateless receivers. Compared with the state-of-the-art, our scheme is well optimized for the broadcast encryption. The computational complexity of decryption of our scheme depends only on the number of receivers, not the maximum number of receivers of the system. Technically, we employ dual system encryption technique and our proposal offers …
A Phantom Assessment Of Achievable Contouring Concordance Across Multiple Treatment Planning Systems, Elise M. Pogson, Jarrad Begg, Michael Jameson, Claire Dempsey, Drew Latty, Vikneswary Batumalai, Andrew Lim, Kankean Kandasamy, Peter E. Metcalfe, Lois C. Holloway
A Phantom Assessment Of Achievable Contouring Concordance Across Multiple Treatment Planning Systems, Elise M. Pogson, Jarrad Begg, Michael Jameson, Claire Dempsey, Drew Latty, Vikneswary Batumalai, Andrew Lim, Kankean Kandasamy, Peter E. Metcalfe, Lois C. Holloway
Faculty of Engineering and Information Sciences - Papers: Part A
In this paper, the highest level of inter- and intra-observer conformity achievable with different treatment planning systems (TPSs), contouring tools, shapes, and sites have been established for metrics including the Dice similarity coefficient (DICE) and Hausdorff Distance. High conformity values, e.g. DICEBreast_Shape = 0.99 ± 0.01, were achieved. Decreasing image resolution decreased contouring conformity.
Induced Molecular Dissociations As A Radiation Damage Descriptor (Nanodosimetry), A Traore, L Ellis-Gibbings, Alexey Verkhovtsev, K Krupa, A Munoz, Fernando Blanco, Gustavo Garcia
Induced Molecular Dissociations As A Radiation Damage Descriptor (Nanodosimetry), A Traore, L Ellis-Gibbings, Alexey Verkhovtsev, K Krupa, A Munoz, Fernando Blanco, Gustavo Garcia
Faculty of Engineering and Information Sciences - Papers: Part A
We present a nanodosimeter software based on Monte Carlo, termed: Low Energy Particle Track Simulation. For medical applications purposes, we propose bond breakings to describe the energy deposited taking water as an example. This tool aims to improve current treatment planning approach based on absorbed dose.
Thin Silicon Strip Detectors For Beam Monitoring In Micro-Beam Radiation Therapy, Marco Povoli, Enver Alagoz, Alberto Bravin, Iwan Cornelius, E Bräuer-Krisch, Pauline Fournier, Thor E. Hansen, Angela Kok, Michael L. F Lerch, E Monakhov, J Morse, Marco Petasecca, Herwig Requardt, Anatoly B. Rosenfeld, D Röhrich, H Sandaker, M Salome, B Stugu
Thin Silicon Strip Detectors For Beam Monitoring In Micro-Beam Radiation Therapy, Marco Povoli, Enver Alagoz, Alberto Bravin, Iwan Cornelius, E Bräuer-Krisch, Pauline Fournier, Thor E. Hansen, Angela Kok, Michael L. F Lerch, E Monakhov, J Morse, Marco Petasecca, Herwig Requardt, Anatoly B. Rosenfeld, D Röhrich, H Sandaker, M Salome, B Stugu
Faculty of Engineering and Information Sciences - Papers: Part A
Microbeam Radiation Therapy (MRT) is an emerging cancer treatment that is currently being developed at the European Synchrotron Radiation Facility (ESRF) in Grenoble, France. This technique uses a highly collimated and fractionated X-ray beam array with extremely high dose rate and very small divergence, to benefit from the dose-volume effect, thus sparing healthy tissue. In case of any beam anomalies and system malfunctions, special safety measures must be installed, such as an emergency safety shutter that requires continuous monitoring of the beam intensity profile. Within the 3DMiMic project, a novel silicon strip detector that can tackle the special features of …
Complex Internal Rearrangement Processes Triggered By Electron Transfer To Acetic Acid, Paulo Limao-Vieira, G Meneses, T Cunha, A. Gil, M Calhorda, Gustavo Garcia, F. Ferreira Da Silva
Complex Internal Rearrangement Processes Triggered By Electron Transfer To Acetic Acid, Paulo Limao-Vieira, G Meneses, T Cunha, A. Gil, M Calhorda, Gustavo Garcia, F. Ferreira Da Silva
Faculty of Engineering and Information Sciences - Papers: Part A
We present negative ion formation from collisions of 100 eV neutral potassium atoms with acetic acid (CH3COOH) and its deuterated analogue molecules (CH3COOD, CD3COOH). From the negative ion time-of-flight (TOF) mass spectra, OH- is the main fragment detected accounting on average for more than 25% of the total anion yield. The complex internal rearrangement processes triggered by electron transfer to acetic acid have been evaluated with the help of theoretical calculations at the DFT levels explaining the fragmentation channel yielding OH-.
Simulink Model For Examining Dynamic Interactions Involving Electro-Mechanical Oscillations In Distribution Systems, Dothinka Ranamuka Rallage, Ashish P. Agalgaonkar, Kashem M. Muttaqi
Simulink Model For Examining Dynamic Interactions Involving Electro-Mechanical Oscillations In Distribution Systems, Dothinka Ranamuka Rallage, Ashish P. Agalgaonkar, Kashem M. Muttaqi
Faculty of Engineering and Information Sciences - Papers: Part A
In Australian medium voltage (MV) distribution networks, the majority of embedded local generation (LG) uses synchronous machine based technology. LG units with a synchronous generator can easily be dispatched and controlled to provide or absorb reactive power and thereby locally supporting the system voltage and increasing the voltage stability margin. The fast response from a synchronous machine based LG unit exciter will ensure fast voltage recovery. This will significantly improve the transient voltage stability. Also, the synchronous machine based LG units can provide inertial support to the system. Furthermore, some of these LG technologies work as standby power supplies all …
Effect Of Heat Input On Stellite 6 Coatings On A Medium Carbon Steel Substrate By Laser Cladding, Alain Kusmoko, Druce P. Dunne, Huijun Li
Effect Of Heat Input On Stellite 6 Coatings On A Medium Carbon Steel Substrate By Laser Cladding, Alain Kusmoko, Druce P. Dunne, Huijun Li
Faculty of Engineering and Information Sciences - Papers: Part A
Stellite 6 was deposited by laser cladding on a medium carbon steel substrate (MS) with energy inputs of 1. kW (MS 1) and 1.8. kW (MS 1.8). The chemical compositions and microstructures of these coatings were characterized by atomic absorption spectroscopy, optical microscopy and scanning electron microscopy. The microhardness of the coatings was measured and the wear mechanism of the coatings was assessed using a pin-on-plate (reciprocating) wear testing machine. The results indicated less cracking and pore development for Stellite 6 coatings applied to the medium carbon steel substrate with the lower heat input (MS 1). Moreover, the Stellite coating …
Dynamic Stall Simulation Of Wind Turbine Airfoils, Xiong Liu, Shi Liang, Yan Chen, Shi Qiang Zhang, Chun Chen
Dynamic Stall Simulation Of Wind Turbine Airfoils, Xiong Liu, Shi Liang, Yan Chen, Shi Qiang Zhang, Chun Chen
Faculty of Engineering and Information Sciences - Papers: Part A
Based on the Beddoes-Leishman (B-L) semi-empirical dynamic stall model, the dynamic stall characteristics of wind turbine airfoils were studied through the analysis of attached flows, separated flows and dynamic vortices. According to the operating conditions of wind turbine airfoils, the method for evaluating dynamic stall coefficients associated with the separated flows and dynamic vortices in the B-L model was amended. The amended model was also extended to produce transient aerodynamic force coefficients over the entire range of possible angles of attack. The lift, drag and pitch moment coefficients of wind turbine airfoils S809 and NACA 4415 during dynamic stall were …
Hybrid Model Predictive Control Of A Residential Hvac System With Pvt Energy Generation And Pcm Thermal Storage, Massimo Fiorentini, Paul Cooper, Zhenjun Ma, Duane A. Robinson
Hybrid Model Predictive Control Of A Residential Hvac System With Pvt Energy Generation And Pcm Thermal Storage, Massimo Fiorentini, Paul Cooper, Zhenjun Ma, Duane A. Robinson
Faculty of Engineering and Information Sciences - Papers: Part A
This paper describes an experimental investigation into the performance of a Hybrid Model Predictive Control (HMPC) system implemented to control a novel solar-assisted HVAC system servicing the Team UOW Solar Decathlon house, the overall winner of the Solar Decathlon China 2013 competition. This HVAC system consists of an air-based photovoltaic thermal (PVT) collector and a phase change material (PCM) thermal store integrated with a conventional ducted reverse-cycle heat pump system. The system was designed for operation during both winter and summer, using daytime solar radiation and night sky radiative cooling to increase the energy efficiency of the air-conditioning system. The …
Understanding Phase Transformations In Steels Using Modern Electron Microscopy Techniques, Elena V. Pereloma, Ahmed A. Saleh, Hendrik T. Spanke, Fayez Al-Harbi, Azdiar A. Gazder
Understanding Phase Transformations In Steels Using Modern Electron Microscopy Techniques, Elena V. Pereloma, Ahmed A. Saleh, Hendrik T. Spanke, Fayez Al-Harbi, Azdiar A. Gazder
Faculty of Engineering and Information Sciences - Papers: Part A
The advantages and limitations of electron back-scattering diffraction coupled with energy dispersive X-ray spectroscopy and of transmission Kikuchi diffraction in relation to the in-depth characterisation of steel microstructures containing phases with similar lattice parameters and/or precipitates are discussed. An in-house developed EBSD map post-processing methodology provided insights into the mechanisms of bainite formation.
Investigation Of Oxide Scale On Ferritic Stainless Steel B445j1m And Its Tribological Effect In Hot Rolling, Xiawei Cheng, Zhengyi Jiang, Jingwei Zhao, Dongbin Wei, Liang Hao, Jianguo Peng, Ming Luo, Li Ma, Suzhen Luo, Laizhu Jiang
Investigation Of Oxide Scale On Ferritic Stainless Steel B445j1m And Its Tribological Effect In Hot Rolling, Xiawei Cheng, Zhengyi Jiang, Jingwei Zhao, Dongbin Wei, Liang Hao, Jianguo Peng, Ming Luo, Li Ma, Suzhen Luo, Laizhu Jiang
Faculty of Engineering and Information Sciences - Papers: Part A
Severe sticking occurs in the hot rolling of ferritic stainless steel B445J1M. The characteristics of the oxide scale on the steel in hot rolling are associated with this phenomenon. The tensile failure of the oxide scale formed on the steel B445J1M was investigated by using a Gleeble 3500 thermo-mechanical simulator over temperature range from 1000 to 1150°C in humid air. Two passes hot rolling were carried out on a 2-high Hille 100 experimental rolling mill. The results show that the temperature is a significant factor for the formed thickness of the oxide scale and its failure in tensile stress. On …