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Articles 1711 - 1740 of 2936
Full-Text Articles in Social and Behavioral Sciences
The Effect Of Chemical Composition On Microstructure And Properties Of Intercritically Reheated Coarse-Grained Heat-Affected Zone In X70 Steels, Zhixiong Zhu, Lenka Kuzmikova, Huijun Li, Frank J. Barbaro
The Effect Of Chemical Composition On Microstructure And Properties Of Intercritically Reheated Coarse-Grained Heat-Affected Zone In X70 Steels, Zhixiong Zhu, Lenka Kuzmikova, Huijun Li, Frank J. Barbaro
Faculty of Engineering and Information Sciences - Papers: Part A
The current study investigates the effect of different levels of Ti, N, and Ti/N ratios on microstructure and properties in the intercritically reheated coarse-grained heat-affected zone (ICCGHAZ) of two-pass submerged arc welds in API 5L grade X70 pipe. Gleeble simulation was employed to reproduce the ICCGHAZ of actual welds. Hardness and Charpy V-notch (CVN) tests were performed on the simulated samples. The microstructure of simulated ICCGHAZ was characterized by optical microscopy and scanning electron microscopy (SEM). LePera color etching technique was employed to identify and quantify the martensitic-austenitic (M-A) constituent. Results show that the simulated ICCGHAZ exhibited extremely low toughness, …
Performance And Prediction Of Marine Clay Treated With Vacuum And Surcharge Consolidation At Port Of Brisbane, Buddhima Indraratna, A S. Balasubramaniam, Harry Poulos, Cholachat Rujikiatkamjorn, Jayantha Ameratunga
Performance And Prediction Of Marine Clay Treated With Vacuum And Surcharge Consolidation At Port Of Brisbane, Buddhima Indraratna, A S. Balasubramaniam, Harry Poulos, Cholachat Rujikiatkamjorn, Jayantha Ameratunga
Faculty of Engineering and Information Sciences - Papers: Part A
During the past decade, the application of vacuum preloading for stabilising soft coastal clay and other low-lying estuarine soils has become popular in Australia. The cost-effectiveness isa major factor in most projects in view of the significantly reduced time for achieving high degree of consolidation. Due to an increase in trade activities at the Port of Brisbane, new facilities on Fisherman Islands at the mouth of the Brisbane River will be constructed on the new outer area (235 ha) adjacent to the existing port facilities via land reclamation. A vacuum assited surcharge load and conventional surcharge scheme in conjunction with …
Characteristics Of Power Quality Disturbances In Australia: Voltage Harmonics, S T. Elphick, V W. Smith, V J. Gosbell, S Perera
Characteristics Of Power Quality Disturbances In Australia: Voltage Harmonics, S T. Elphick, V W. Smith, V J. Gosbell, S Perera
Faculty of Engineering and Information Sciences - Papers: Part A
Management of harmonic voltage levels can impose significant economic impacts for both electricity suppliers and customers. For the case where harmonic voltage levels are high, economic costs include damage to equipment and associated loss of production due to high voltage harmonic levels as well as the costs associated with mitigation of harmonic currents, for example, harmonic filters. In the alternate scenario, ie. the case where harmonic voltage levels are acceptable, considerable expense may be incurred mitigating harmonic currents unnecessarily due to lack of knowledge of harmonic levels and/or network capabilities. As such, there is considerable potential for industry to make …
Rail Track Infrastructure For Enhanced Speed - Analysis Design And Construction Challenges, Buddhima Indraratna, Sanjay Shrawan Nimbalkar, Jayan Sylaja J S Vinod
Rail Track Infrastructure For Enhanced Speed - Analysis Design And Construction Challenges, Buddhima Indraratna, Sanjay Shrawan Nimbalkar, Jayan Sylaja J S Vinod
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. Conscious efforts to improve productivity, modernization and technology upgrading have led to an impressive growth in railways. Large-scale physical modeling, sophisticated numerical modeling and full-scale field monitoring often provide significant knowledge to better understand track performance and to extend the current state-of-the-art in design. A series of large-scale laboratory tests were conducted to establish relationships between (i) ballast breakage and train speed, (ii) ballast fouling and strength and (iii) interface strength and geogrids. Comprehensive field trials were carried out on instrumented …
Consistency Proof Of Two Denoising Methods And The Parameter Selection Of Pde Filtering Method For Espi, Zhitao Xiao, Quan Yuan, Fang Zhang, Jun Wu, Lei Geng, Zhenbei Xu, Jiangtao Xi
Consistency Proof Of Two Denoising Methods And The Parameter Selection Of Pde Filtering Method For Espi, Zhitao Xiao, Quan Yuan, Fang Zhang, Jun Wu, Lei Geng, Zhenbei Xu, Jiangtao Xi
Faculty of Engineering and Information Sciences - Papers: Part A
Electronic speckle pattern interferometry (ESPI) is a nondestructive, whole-field optical measurement technique. The removal of speckle noise is fundamental to extract measurement information accurately. In this letter, two filtering methods based on the oriented feature of ESPI fringes, i.e., the second-order oriented partial differential equation (SOOPDE) and oriented, regularized quadratic-cost function filtering methods, are first proven to be consistent. An important question in solving partial differential equation, i.e., how to select suitable parameters in an adaptive manner, is then discussed. The computer-simulated and experimentally obtained ESPI fringe patterns and phase map are processed by the SOOPDE filtering model with adaptive …
The K-Theory Of Heegaard Quantum Lens Spaces, Piotr M. Hajac, Adam Rennie, Bartosz Zielinski
The K-Theory Of Heegaard Quantum Lens Spaces, Piotr M. Hajac, Adam Rennie, Bartosz Zielinski
Faculty of Engineering and Information Sciences - Papers: Part A
Representing Z/NZ as roots of unity, we restrict a natural U(1)-action on the Heegaard quantum sphere to Z/NZ, and call the quotient spaces Heegaard quantum lens spaces. Then we use this representation of Z/NZ to construct an associated complex loine bundle. This paper proves the stable non-triviality of these line bundles over any of the quantum lens spaces we consider. We use the pullback structure of the C*-algebra of the lens space to compute its K-theory via the Mayer-Vietoris sequence, and an explicit form of the Bass connecting homomorphism to prove the stable non-triviality of the bundles. On the algebraic …
Suburban Bus Route Design, Shuaian Wang, Xiaobo Qu, Zhiyuan Liu
Suburban Bus Route Design, Shuaian Wang, Xiaobo Qu, Zhiyuan Liu
Faculty of Engineering and Information Sciences - Papers: Part A
Rural and suburban areas have a low density of population. Hence, the bus services have unique features that enable the design of suburban bus route a practical and interesting research topic. We formulate a suburban bus route design problem and prove its NP-hardness. A dynamic programming approach is developed to obtain the optimal solution. A case study is reported to demonstrate the applicability of the proposed model and solution method.
Stainlessness, Etienne Turpin
Stainlessness, Etienne Turpin
Faculty of Engineering and Information Sciences - Papers: Part A
To accompany the book Stainlessness, published this Spring by the Journal of Aesthetics and Protest Press (Leipzig and Los Angeles), Sound & Language Distribution is pleased to announce the release of a Limited Edition set of prints. The etched plates on view in the Convenience Gallery - and the set of prints they produced - tell the story of labor movements in North America and show how they have shaped the cities of Sudbury, Chicago, Pittsburgh, and Detroit. While processes of urbanization have all but erased these struggles from our cities and left only ambivalent monuments to mark the past, …
Is 'Community' Important For Community Information Systems?, Alison E. Freeman, Peter Hyland, Mark Freeman, Karlheinz Kautz
Is 'Community' Important For Community Information Systems?, Alison E. Freeman, Peter Hyland, Mark Freeman, Karlheinz Kautz
Faculty of Engineering and Information Sciences - Papers: Part A
Community information systems have the power to transform communities. However, without fully understanding the pre-requisite factors affecting community information system viability, and the complex relationships between these factors, communities struggle to manage such projects in a way that leads to viable systems that deliver real benefits. This paper develops and presents a Model of Community Information System Viability Pre-requisite Factors, based on both existing literature and the study of three community information system projects. This Model represents the generic factors that inform viability (i.e. leadership, active membership, funding, awareness, and system design and functionality), and also considers the impact of …
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 …
Size And Power Of Cointegration Tests With Non-Normal Garch Error Distributions, Chaiwat Kosapattarapim, Yan-Xia Lin, Michael Mccrae
Size And Power Of Cointegration Tests With Non-Normal Garch Error Distributions, Chaiwat Kosapattarapim, Yan-Xia Lin, Michael Mccrae
Faculty of Engineering and Information Sciences - Papers: Part A
Several tests for cointegration among non-stationary financial time series have been developed including the Dicky Fuller (1979) unit root tests, the Cointegration Regression Durbin-Watson test (1983), the Wild Bootstrap test (2003) and the Johansen likelihood ratio tests (1988). The Johensen's tests appeared to provide superior results when the tests were originally applied to situations where the cointegration errors were normally distributed. However, substantial empirical evidences show that financial time series tend to be nonnormal in their distribution which may, in turn, lead to non-normal GARCH type cointegration error distributions. The question addressed in this paper is whether the Johansen's tests …
An Investigation Of The Effectiveness Of Interdiction Regimes Against Terrorist Attacks In An Urban Transport Hub, D Keep, I Piper, A Green
An Investigation Of The Effectiveness Of Interdiction Regimes Against Terrorist Attacks In An Urban Transport Hub, D Keep, I Piper, A Green
Faculty of Engineering and Information Sciences - Papers: Part A
This paper examines the effect of varying attack and interdiction strategies, both alone and in combination, in an urban transport hub. Particular attention is paid to the potential disruption to normal commuter services resulting from an intrusive stop and search regime. The work presented here represents a qualitative investigation in that many parameters relating to the details of the interdiction mechanisms are first-order approximations. However, the background against which the investigation is conducted has been constructed to be as realistic as possible. The simulation is performed using our generalised microsimulation framework Simulacron , along with a reper- toire of simulation …
Constant-Size Dynamic K-Times Anonymous Authentication, Man Ho Au, Willy Susilo, Yi Mu, Sherman S. M Chow
Constant-Size Dynamic K-Times Anonymous Authentication, Man Ho Au, Willy Susilo, Yi Mu, Sherman S. M Chow
Faculty of Engineering and Information Sciences - Papers: Part A
Dynamic k-times anonymous authentication (k-TAA) schemes allow members of a group to be authenticated anonymously by application providers for a bounded number of times, where application providers can independently and dynamically grant or revoke access right to members in their own group. In this paper, we construct a dynamic k-TAA scheme with space and time complexities of O(log(k)) and a variant, in which the authentication protocol only requires constant time and space complexities at the cost of O(k) -sized public key. We also describe some tradeoff issues between different system characteristics. We detail all the zero-knowledge proof-of-knowledge protocols involved and …
Computational Fluid Dynamics Modelling Of Respirable Dust And Gas Behaviour On A Longwall Face, T Ren, Z Wang
Computational Fluid Dynamics Modelling Of Respirable Dust And Gas Behaviour On A Longwall Face, T Ren, Z Wang
Faculty of Engineering and Information Sciences - Papers: Part A
Longwall mining is the dominant form of underground coal mining methods in Australia. As production increases there is also a need for increased face ventilation rate for gas dilution and dust mitigation. The behaviour of gas emission and respirable dust in a longwall face is a complex process because of the nature of longwall operations. The generation, dispersion and transport of airborne dust and gas are governed mainly by the spatial velocity and the movement pattern of the ventilation air. To understand the gas and dust behaviour in a complex longwall mining environment and to evaluate the effectiveness of various …
Quantitative Hahn-Banach Theorems And Isometric Extensions For Wavelet And Other Banach Spaces, Sergey Ajiev
Quantitative Hahn-Banach Theorems And Isometric Extensions For Wavelet And Other Banach Spaces, Sergey Ajiev
Faculty of Engineering and Information Sciences - Papers: Part A
We introduce and study Clarkson, Dol’nikov-Pichugov, Jacobi and mutual diameter constants reflecting the geometry of a Banach space and Clarkson, Jacobi and Pichugov classes of Banach spaces and their relations with James, self-Jung, Kottman and Sch¨affer constants in order to establish quantitative versions of Hahn-Banach separability theorem and to characterise the isometric extendability of H¨older-Lipschitz mappings. Abstract results are further applied to the spaces and pairs from the wide classes IG and IG+ and non-commutative Lp-spaces. The intimate relation between the subspaces and quotients of the IG-spaces on one side and various types of anisotropic Besov, Lizorkin-Triebel and Sobolev spaces …
Recent Developments In Flat Rolling Technologies, Hailiang Yu, Cheng Lu, A Kiet Tieu, Ajit Godbole
Recent Developments In Flat Rolling Technologies, Hailiang Yu, Cheng Lu, A Kiet Tieu, Ajit Godbole
Faculty of Engineering and Information Sciences - Papers: Part A
In this paper, a survey of four relatively recent rolling technologies is presented. The merits and drawbacks of each technique are examined. These techniques are: (1) Heated Roll Rolling, and the suitability of this technique for magnesium sheet production; (2) Asymmetric Cryorolling, which has potential for large-scale industrial production of nanostructural materials; (3) Variable-Gauge Rolling, used for production of flat products with variable thicknesses; and (4) Through-width Vibration Rolling, used for fabrication of ultrafine material sheets. Where possible, computer simulations of the rolling processes are described. Among the interesting simulation results obtained is the finding that the shear strain distribution …
A Relaxation Strategy With Fuzzy Constraints For Supplier Selection In A Power Market, Dien Tuan Le, Minjie Zhang, Fenghui Ren
A Relaxation Strategy With Fuzzy Constraints For Supplier Selection In A Power Market, Dien Tuan Le, Minjie Zhang, Fenghui Ren
Faculty of Engineering and Information Sciences - Papers: Part A
A power market is a special kind of e-markets. In a power market, all trading processes are related to three parties: buyers, suppli- ers and brokers. A broker acts as middlemen between buyers and sup- pliers in a trading process. In a power market, how to select a potential supplier for a buyer through a broker based on the buyer's requirements is a challenging research problem. This paper proposes relaxation strat- egy with fuzzy constraints for supplier selection. The strategy includes three components, i.e., a supplier selection, a fuzzy constraint relaxation, and a decision making. The major contributions of this …
Modeling Of Thin Strip Profile During Cold Rolling On Roll Crossing And Shifting Mill, A Aljabri, Z Y. Jiang, D B. Wei, X D. Wang, H Tibar
Modeling Of Thin Strip Profile During Cold Rolling On Roll Crossing And Shifting Mill, A Aljabri, Z Y. Jiang, D B. Wei, X D. Wang, H Tibar
Faculty of Engineering and Information Sciences - Papers: Part A
Strip profile control in cold rolling of thin strip is a difficult and challenge problem found in industry. Currently using the novel type of strip rolling mill, such as the work roll crossing and shifting is the one of the main methods to control the strip profile quality in cold rolling. In this paper, 3-D finite element simulation models of the thin strip profile in cold rolling for the work roll crossing and shifting system were successfully developed. The strip profile and edge drop are discussed considering both crossing angle and shifting value of the work rolls. The research shows …
Tuning Performance Of E-Business Applications Through Automatic Transformation Of Persistent Database Structures, Janusz R. Getta
Tuning Performance Of E-Business Applications Through Automatic Transformation Of Persistent Database Structures, Janusz R. Getta
Faculty of Engineering and Information Sciences - Papers: Part A
Performance of e-business applications strongly depends on internal implementations of persistent database structures and on effective algorithms processing these structures. Commercial database systems, which are the basis of e-business applications typically implement logical database structures with one-size-fits-all persistent storage structure. This work investigates a new class of database systems where a conceptual and logical view of a database can be implemented in many different ways depending on the performance requirements of database applications. We consider the improvements to performance of e-business applications through automatic changes of the persistent database structures in the ways indicated by the performance statistics obtained from …
Modernisation Of Rail Tracks For Higher Speeds And Greater Freight, B Indraratna, S Nimbalkar, C Rujikiatkamjorn
Modernisation Of Rail Tracks For Higher Speeds And Greater Freight, B Indraratna, S Nimbalkar, C Rujikiatkamjorn
Faculty of Engineering and Information Sciences - Papers: Part A
An efficient transportation infrastructure has become utmost priority for global economic reforms. Railways are designed to provide high speed passenger and heavy haul freight transportation. Ballast is one of important constituents of the rail track however, it experiences excessive deformation and degradation from trains operating at high speeds. In addition, tracks built along coastal areas often undergo large settlements due to soft compressible clay deposits. This leads to progressive track deterioration and necessitates frequent and costly track maintenance. The use of artificial inclusions such as geogrids, geocomposites, shock mats and prefabricated vertical drains (PVDs) is often an attractive design alternative …
Secure Exchange Of Electronic Health Records, Alejandro Flores Zuniga, Khin Than Win, Willy Susilo
Secure Exchange Of Electronic Health Records, Alejandro Flores Zuniga, Khin Than Win, Willy Susilo
Faculty of Engineering and Information Sciences - Papers: Part A
Protecting the confidentiality of a patient's information in a shared care environment could become a complex task. Correct identification of users, assigning of access permissions, and resolution of conflict rise as main points of interest in providing solutions for data exchange among health care providers. Traditional approaches such as Mandatory Access Control, Discretionary Access control and Role-Based Access Control policies do not always provide a suitable solution for health care settings, especially for shared care environments. The core of this contribution consists in the description of an approach which uses attribute-based encryption to protect the confidentiality of patients' information during …
A Resources Provision Policy For Multi-Unit Maintenance Program, Winda Nur Cahyo, Khaled El-Akruti, Richard Dwight, Tieling Zhang
A Resources Provision Policy For Multi-Unit Maintenance Program, Winda Nur Cahyo, Khaled El-Akruti, Richard Dwight, Tieling Zhang
Faculty of Engineering and Information Sciences - Papers: Part A
A System Dynamics model for resource provision policy in multi-unit maintenance program is developed. First, a scheme is developed to formulate and evaluate policies regarding the provision under uncertain condition or resource requirement in a period of planning to result in minimum maintenance cost. The model emphasizes on resourcing strategy involving human and procurement. It is composed of 3 sub-models presented in a causal loop modelling. The human resource sub-model focuses on policies related to provision and management. The procurement sub-model takes into account the procurement process and inventory system. Due to data availability, the verification has encloses only the …
The Role Of Life Cycle Cost In Engineering Asset Management, Khaled El-Akruti, Richard Dwight, Tieling Zhang, Mujbil Al-Marsumi
The Role Of Life Cycle Cost In Engineering Asset Management, Khaled El-Akruti, Richard Dwight, Tieling Zhang, Mujbil Al-Marsumi
Faculty of Engineering and Information Sciences - Papers: Part A
This paper presents a case study demonstrating life cycle cost (LCC) analysis as a major and critical activity of engineering asset management decisions and control. The objective is to develop a maintenance policy to control the economics of replacement and repair practice of refractory lining of an electric arc furnace (EAF). The replacement & repair policies involve the optimum life policy, the repair versus replacement policies, the repair limit method and the comparison of lining material types from different suppliers. The developed models provide a method for defining the most important factors involved in decision making with respect to operational …
Removal Of Trace Organic Contaminants By The Forward Osmosis Process, Abdulhakeem Alturki, James Mcdonald, Stuart Khan, William Price, Long Nghiem, Menachem Prof Menachem Elimelech
Removal Of Trace Organic Contaminants By The Forward Osmosis Process, Abdulhakeem Alturki, James Mcdonald, Stuart Khan, William Price, Long Nghiem, Menachem Prof Menachem Elimelech
Faculty of Engineering and Information Sciences - Papers: Part A
The rejection of trace organic contaminants (TrOCs) by an osmotically driven membrane filtration process was investigated. A set of 40 compounds representing major groups of TrOCs of concern was selected for this study. The rejection of the TrOCs by a commercial cellulose acetate asymmetric forward osmosis membrane, as well as a ''tight'' commercial thin-film composite nanofiltration (NF) membrane, was systematically investigated and compared under three different operating modes: forward osmosis (FO), pressure retarded osmosis (PRO) and reverse osmosis (RO). Results revealed that the cellulose acetate membrane had considerably smaller water and salt permeabilities as well as less negative surface charge …
Description And Comparison Of Documentation Of Nursing Assessment Between Paper-Based And Electronic Systems In Australian Aged Care Homes, Ning Wang, Ping Yu, David Hailey
Description And Comparison Of Documentation Of Nursing Assessment Between Paper-Based And Electronic Systems In Australian Aged Care Homes, Ning Wang, Ping Yu, David Hailey
Faculty of Engineering and Information Sciences - Papers: Part A
Purpose: To describe nursing assessment documentation practices in aged care organizations and to evaluate the quality of electronic versus paper-based documentation of nursing assessment. Methods: This was a retrospective nursing documentation audit study. Study samples were 2299 paper-based and 6997 electronic resident assessment forms contained in 159 paper-based and 249 electronic resident nursing records, respectively, from three aged care organizations. The practice of nursing assessment documentation in participating aged care homes was described. Three attributes of quality of nursing assessment documentation were evaluated: format and structure, process, and content by seven measures: quantity, completeness, timeliness comprehensiveness, frequencies of documentation specific …
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 …
Voltage Sag Susceptibility Of 230 V Equipment, Sean Elphick, Victor Smith, Victor Gosbell, Gerrard Drury, Sarath Perera
Voltage Sag Susceptibility Of 230 V Equipment, Sean Elphick, Victor Smith, Victor Gosbell, Gerrard Drury, Sarath Perera
Faculty of Engineering and Information Sciences - Papers: Part A
The ITI curve developed by the Information Technology Industry Council (USA) describes an AC input voltage envelope, which typically can be tolerated by most information technology (IT) equipment supplied by nominal 120 V 60 Hz electricity networks. Although the curve ostensibly applies only to IT equipment supplied at 120 V 60 Hz it is often used throughout the electricity supply industry, including at other nominal voltages and frequencies, without modification or consideration of applicability to provide an indication of the input voltage tolerance of a wide range of equipment. This paper details a preliminary study aimed at developing an ITI …
The Simulation Of Particle Flow Mechanisms In Dustiness Testers, Sathaphon Wangchai, David B. Hastie, Peter W. Wypych
The Simulation Of Particle Flow Mechanisms In Dustiness Testers, Sathaphon Wangchai, David B. Hastie, Peter W. Wypych
Faculty of Engineering and Information Sciences - Papers: Part A
Dust generation is a common result of many bulk handling and mining applications and has potentially serious consequences to the surrounding environment as well as workers and nearby community. Companies need to know how much and what type of dust is being generated so they can find ways to reduce this dust. Dustiness testers can be used for this purpose. This paper investigates the rotating drum testers used for dustiness testing of bulk solids and the subsequent discrete element method (DEM) simulation of the particle mechanisms. Preliminary comparisons of the rotating drum designs were undertaken using particle/bulk parameters of a …
Determining The Geometry Of Mass-Flow Bins - Some Important Considerations, Peter Arnold
Determining The Geometry Of Mass-Flow Bins - Some Important Considerations, Peter Arnold
Faculty of Engineering and Information Sciences - Papers: Part A
It has taken some time to obtain general acceptance but in recent times, at least in Australia, competent designers of mass-flow bins use techniques based on the traditional concepts of Jenike to determine the appropriate geometry for mass-flow hoppers to handle bulk solids reliably. While the traditional Jenike design concepts may appear straightforward experience dictates that some important considerations need to be exercised during the design process, especially when handling the more difficult bulk solids, to ensure that the final bin construction performs to expectations. Some of the important considerations that this paper will highlight include: • Appropriate bulk solids …
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 …