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Articles 1291 - 1320 of 2936
Full-Text Articles in Social and Behavioral Sciences
Applications Of Controllable Smart Fluids To Mechanical Systems, Seung-Bok Choi, Norman Wereley, Weihua Li, Miao Yu, Jeong-Hoi Koo
Applications Of Controllable Smart Fluids To Mechanical Systems, Seung-Bok Choi, Norman Wereley, Weihua Li, Miao Yu, Jeong-Hoi Koo
Faculty of Engineering and Information Sciences - Papers: Part A
For this special issue, 20 papers have been received, and three of which have been withdrawn. After strict review processes by the world-wide experts on the smart fluids technology, 10 papers have been accepted and are published here.The published papers cover various application devices and systems, which can be controllable to achieve desired performances by applying the external fields to the smart fluid domains. A brief summary of each application item proposed in the published papers is given as follows.
Effect Of Polytetrafluoroethylene Material On Dynamic Behaviour Of An Underactuated Unmanned Aerial Vehicle, Abdel Ilah N. Alshbatat, Peter J. Vial, Liang Dong
Effect Of Polytetrafluoroethylene Material On Dynamic Behaviour Of An Underactuated Unmanned Aerial Vehicle, Abdel Ilah N. Alshbatat, Peter J. Vial, Liang Dong
Faculty of Engineering and Information Sciences - Papers: Part A
An unmanned aerial vehicle (UAV) is an aircraft capable of flight without a human operator. This aircraft can be controlled remotely or autonomously via a preprogrammed flight path. A quadrotor UAV is one of the best unmanned aerial vehicles. It is an aircraft whose lift is generated by four DC motors and it is able to take off and land vertically. It also has the advantage that it can be controlled by varying the speeds of the four motors in a systematic manner. In this paper, we present the design, development, testing and implementation of a quadrotor unmanned aerial vehicle. …
Thermodynamic Model Of Coherent Island Formation On Vicinal Substrate, Xu Zhang, Yanguang Yu, Xiao-Hong Sun, Xiaomin Ren
Thermodynamic Model Of Coherent Island Formation On Vicinal Substrate, Xu Zhang, Yanguang Yu, Xiao-Hong Sun, Xiaomin Ren
Faculty of Engineering and Information Sciences - Papers: Part A
A thermodynamic model has been proposed to address the formation of coherent island on the vicinal substrate. The morphological transition from square based island to elongated based one with various substrate misorientations is described. The initial stage of nucleation and growth process of islands in Stranski-Krastanow system is studied by taking into account the elastic deformations and the change of energy in the case of two-dimensional growth mode. The theoretical analysis shows the minimum nucleation barrier of island is on the decrease with increment of substrate misorientation, which means the nucleation of island on vicinal substrate is more favorable than …
New Approach To Improve The Performance Of Fringe Pattern Profilometry Using Multiple Triangular Patterns For The Measurement Of Objects In Motion, Lei Lu, Jiangtao Xi, Yanguang Yu, Qinghua Guo
New Approach To Improve The Performance Of Fringe Pattern Profilometry Using Multiple Triangular Patterns For The Measurement Of Objects In Motion, Lei Lu, Jiangtao Xi, Yanguang Yu, Qinghua Guo
Faculty of Engineering and Information Sciences - Papers: Part A
Fringe pattern profilometry using triangular patterns and intensity ratios is a robust and computationally efficient method in three-dimensional shape measurement technique. However, similar to other multiple-shot techniques, the object must be kept static during the process of measurement, which is a challenging requirement for the case of fast-moving objects. Errors will be introduced if the traditional multiple-shot techniques are used directly in the measurement of a moving object. A new method is proposed to address this issue. First, the movement of the object is measured in real time and described by the rotation matrix and translation vector. Then, the expressions …
Spatial Shift Unwrapping For Digital Fringe Profilometry Based On Spatial Shift Estimation, Pu Cao, Jiangtao Xi, Yanguang Yu, Qinghua Guo
Spatial Shift Unwrapping For Digital Fringe Profilometry Based On Spatial Shift Estimation, Pu Cao, Jiangtao Xi, Yanguang Yu, Qinghua Guo
Faculty of Engineering and Information Sciences - Papers: Part A
An approach is presented to solve the problem of spatial shift wrapping associated with spatial shift estimation-based fringe pattern profilometry (FPP). This problem arises as the result of fringe reuses (that is, use of fringes with periodic light intensity variance), and the spatial shift can only be identified without ambiguity within the range of a fringe width. It is demonstrated that the problem is similar to the phase unwrapping problem associated with the phase-detection-based FPP, and the proposed method is inspired by the existing ideas of using multiple images with different wavelengths proposed for phase unwrapping. The effectiveness of the …
Multi-Agent Receding Horizon Control With Neighbour-To-Neighbour Communication For Prevention Of Voltage Collapse In A Multi-Area Power System, Sk. Razibul Islam, Kashem M. Muttaqi, Danny Sutanto
Multi-Agent Receding Horizon Control With Neighbour-To-Neighbour Communication For Prevention Of Voltage Collapse In A Multi-Area Power System, Sk. Razibul Islam, Kashem M. Muttaqi, Danny Sutanto
Faculty of Engineering and Information Sciences - Papers: Part A
In this study, a multi-agent receding horizon control is proposed for emergency control of long-term voltage instability in a multi-area power system. The proposed approach is based on a distributed control of intelligent agents in a multi-agent environment where each agent preserves its local information and communicates with its neighbours to find an optimal solution. In this study, optimality condition decomposition is used to decompose the overall problem into several subproblems, each to be solved by an individual agent. The main advantage of the proposed approach is that the agents can find an optimal solution without the interaction of any …
Simultaneous Measurement Of Vibration And Parameters Of A Semiconductor Laser Using Self-Mixing Interferometry, Yan Gao, Yanguang Yu, Jiangtao Xi, Qinghua Guo
Simultaneous Measurement Of Vibration And Parameters Of A Semiconductor Laser Using Self-Mixing Interferometry, Yan Gao, Yanguang Yu, Jiangtao Xi, Qinghua Guo
Faculty of Engineering and Information Sciences - Papers: Part A
Laser diode (LD)-based self-mixing interferometry (SMI) is a promising technique for noncontact sensing and its instrumentation. According to the well-known Lang-Kobayashi equations, an SMI waveform is shaped by multiple parameters, including linewidth enhancement factor (denoted as α), optical feedback level factor (denoted as C), and the movement of the external cavity of an LD. This paper presents a new algorithm for simultaneously retrieving the multiple parameters from a piece of SMI signal. First, a set of linear equations is derived based on the existing SMI model. By careful selection of data samples, the linear equations canbe made independent and used …
Improving The Accuracy Performance Of Phase-Shifting Profilometry For The Measurement Of Objects In Motion, Lei Lu, Jiangtao Xi, Yanguang Yu, Qinghua Guo
Improving The Accuracy Performance Of Phase-Shifting Profilometry For The Measurement Of Objects In Motion, Lei Lu, Jiangtao Xi, Yanguang Yu, Qinghua Guo
Faculty of Engineering and Information Sciences - Papers: Part A
This Letter presents a new approach to reducing the errors associated with the shape measurement of a rigid object in motion by means of phase-shifting profilometry. While the work previously reported is only valid for the case of two-dimensional (2-D) movement, the proposed method is effective for a situation in which the object moves in a three-dimensional (3-D) space. First, a new model is proposed to describe the fringe patterns reflected from the object, which is subject to 3-D movement. Then, an iterative least-squares algorithm is presented to estimate the phase map. Experiments show that, in contrast to conventional phase-shifting …
Potential Gains From Using Unit Level Cost Information In A Model-Assisted Framework, David G. Steel, Robert Graham Clark
Potential Gains From Using Unit Level Cost Information In A Model-Assisted Framework, David G. Steel, Robert Graham Clark
Faculty of Engineering and Information Sciences - Papers: Part A
In developing the sample design for a survey we attempt to produce a good design for the funds available. Information on costs can be used to develop sample designs that minimise the sampling variance of an estimator of total for fixed cost. Improvements in survey management systems mean that it is now sometimes possible to estimate the cost of including each unit in the sample. This paper develops relatively simple approaches to determine whether the potential gains arising from using this unit level cost information are likely to be of practical use. It is shown that the key factor is …
Discussion: Prediction Of Long-Term Urban Stormwater Loads At Single Sites, Daniel May, Muttucumaru Sivakumar, Fahimeh Sarmadi, Mohammad Azmi, Mana Gharun
Discussion: Prediction Of Long-Term Urban Stormwater Loads At Single Sites, Daniel May, Muttucumaru Sivakumar, Fahimeh Sarmadi, Mohammad Azmi, Mana Gharun
Faculty of Engineering and Information Sciences - Papers: Part A
Contribution by Fahimeh Sarmadi, Mohammad Azmi and Mana Gharun May and Sivakumar (2013) have predicted the long-term urban stormwater loads at single sites, using five different measures of central tendency. They have stated that their motivation in using measures of central tendency is one in which, in contrast to regression and process-based methods, there is no need for correlating urban stormwater loads with other variables (e.g. discharge), as well as less complexity. Overall, the flow-weighted mean concentration has produced the most accurate predictions of long-term loads.
Unabridged Phase Diagram For Single-Phased Fesexte1-X Thin Films, Jincheng Zhuang, Wai Kong Yeoh, Xiangyuan Cui, Xun Xu, Yi Du, Zhixiang Shi, Simon P. Ringer, Xiaolin Wang, Shi Xue Dou
Unabridged Phase Diagram For Single-Phased Fesexte1-X Thin Films, Jincheng Zhuang, Wai Kong Yeoh, Xiangyuan Cui, Xun Xu, Yi Du, Zhixiang Shi, Simon P. Ringer, Xiaolin Wang, Shi Xue Dou
Faculty of Engineering and Information Sciences - Papers: Part A
A complete phase diagram and its corresponding physical properties are essential prerequisites to understand the underlying mechanism of iron-based superconductivity. For the structurally simplest 11 (FeSeTe) system, earlier attempts using bulk samples have not been able to do so due to the fabrication difficulties. Here, thin FeSexTe1-x films with the Se content covering the full range (0 ≤ x ≤ 1) were fabricated by using pulsed laser deposition method. Crystal structure analysis shows that all films retain the tetragonal structure in room temperature. Significantly, the highest superconducting transition temperature (TC = 20 K) occurs in the newly discovered domain, i.e., …
Dynamic Conductivity Of The Bulk States Of N-Type Hgte/Cdte Quantum Well Topological Insulator, Qinjun Chen, Matthew Sanderson, J C. Cao, Chao Zhang
Dynamic Conductivity Of The Bulk States Of N-Type Hgte/Cdte Quantum Well Topological Insulator, Qinjun Chen, Matthew Sanderson, J C. Cao, Chao Zhang
Faculty of Engineering and Information Sciences - Papers: Part A
We theoretically studied the frequency-dependent current response of the bulk state of topological insulator HgTe/CdTe quantum well. The optical conductivity is mainly due to the inter-band process at high frequencies. At low frequencies, intra-band process dominates with a dramatic drop to near zero before the inter-band contribution takes over. The conductivity decreases with temperature at low temperature and increases with temperature at high temperature. The transport scattering rate has an opposite frequency dependence in the low and high temperature regime. The different frequency dependence is due to the interplay of the carrier-impurity scattering and carrier population near the Fermi surface.
Adaptive Antenna Selection For Energy-Efficient Mimo-Ofdm Wireless Systems, Ngoc Phuc Le, Le Chung Tran, Farzad Safaei
Adaptive Antenna Selection For Energy-Efficient Mimo-Ofdm Wireless Systems, Ngoc Phuc Le, Le Chung Tran, Farzad Safaei
Faculty of Engineering and Information Sciences - Papers: Part A
In this paper, we investigate energy-efficiency in antenna selection OFDM-based systems. We show that an OFDM system with conventional antenna selection approaches, including per-subcarrier selection (i.e., selecting antennas independently for each subcarrier) and bulk-selection (i.e., choosing the same antennas for all subcarriers), suffers from a significant loss in energy-efficiency. To achieve a better energy-efficiency performance, we propose an adaptive antenna selection scheme where both the number of active RF (radio frequency) chains and the antenna indices are selected depending on the channel condition. This selection scheme could be implemented by exhaustive search. Moreover, we develop an algorithm that achieves a …
A Study Surface Layer And Hardness Produced By Induction Hardened S45c Steel, Alain Parisianto, Rosfian Dahar, Huijun Li, Syamsul Hadi
A Study Surface Layer And Hardness Produced By Induction Hardened S45c Steel, Alain Parisianto, Rosfian Dahar, Huijun Li, Syamsul Hadi
Faculty of Engineering and Information Sciences - Papers: Part A
A cylinder of Carbon Steel S45C with a ferrite and pearlite structure was analysed to improve the hardness and surface layer as well as the toughness. Accordingly, it is important to undertake a heat treatment process for the hardness and surface layer of this steel. The heat teatment process was carried out using induction heating with five different temperatures of 800°C, 900°C, 1000°C, 1100°C and 1200 °C followed by water quenching with certain cooling speed. The chemical compositions and microstructures of these samples were characterized by spectrometer and optical microscopy. The microhardness of the samples was measured and the surface …
Assessment Of The Post-Compaction Characteristics Of A Silty Sand, Ana Heitor, Buddhima Indraratna, Cholachat Rujikiatkamjorn
Assessment Of The Post-Compaction Characteristics Of A Silty Sand, Ana Heitor, Buddhima Indraratna, Cholachat Rujikiatkamjorn
Faculty of Engineering and Information Sciences - Papers: Part A
Conventional field compaction control methods are effective at the time of placement. However, the discrete nature of these measurements and a limited depth of investigation can render them unsuitable for post-construction compaction quality assessments of deeper fills or larger surface areas. In this situation, classical destructive geotechnical surveys (i.e. boreholes, cone penetration tests) are sought to evaluate the current fill conditions. Nevertheless, these methods often do not provide the required level of information because only certain locations are tested and they have tremendous implications in terms of cost. The use of available non-destructive methodologies, such as shear wave velocity surveys …
Dem Modelling Of Methane Hydrate Bearing Sand, J S. Vinod, Masayuki Hyodo, Buddhima Indraratna, Roy Miller
Dem Modelling Of Methane Hydrate Bearing Sand, J S. Vinod, Masayuki Hyodo, Buddhima Indraratna, Roy Miller
Faculty of Engineering and Information Sciences - Papers: Part A
Methane gas hydrates are crystalline compounds formed from water and methane under certain pressure and temperature. They are mostly found in marine continental margin sediments and beneath the permafrost and considered as the future non-conventional energy resource. In order to develop innovative techniques for the safe extraction of methane gas from Methane Hydrate (MH) it is important to understand the shear behaviour of methane hydrate bearing sand. It has been reported that the pore scale habits of MH have a significant influence on the shear behaviour of methane hydrate bearing sand. In this paper, an attempt has been made to …
Modeling A Soft Robotic Mechanism Articulated With Dielectric Elastomer Actuators, Chuc H. Nguyen, Gursel Alici, Rahim Mutlu
Modeling A Soft Robotic Mechanism Articulated With Dielectric Elastomer Actuators, Chuc H. Nguyen, Gursel Alici, Rahim Mutlu
Faculty of Engineering and Information Sciences - Papers: Part A
In this paper, a translational actuation mechanism in the form of a parallel-crank mechanism (i.e. double-crank 4-bar mechanism) articulated with two dielectric elastomer actuators working in parallel are fabricated. This structure, which is a fully soft mechanism, is established by stretching a dielectric elastomer (DE) film over a PET (polyethylene terephthalate) frame so that the energy released from the stretched DE film is stored in the frame as bending energy. The mechanism generates a translational output under a driving voltage applied between two electrodes of the DE film. The visco-elastic models are proposed for the mechanism so that the mechanical …
Index Theory For Locally Compact Noncommutative Geometries, Alan Carey, V Gayral, Adam Rennie, F Sukochev
Index Theory For Locally Compact Noncommutative Geometries, Alan Carey, V Gayral, Adam Rennie, F Sukochev
Faculty of Engineering and Information Sciences - Papers: Part A
Spectral triples for nonunital algebras model locally compact spaces in noncommutative geometry. In the present text, we prove the local index formula for spectral triples over nonunital algebras, without the assumption of local units in our algebra.
Omitting Types And Af Algebras, Kevin Carlson, Enoch Cheung, Ilijas Farah, Alexander Gerhardt-Bourke, Bradd Hart, Leanne Mezuman, Nigel Sequeira, Alexander Sherman
Omitting Types And Af Algebras, Kevin Carlson, Enoch Cheung, Ilijas Farah, Alexander Gerhardt-Bourke, Bradd Hart, Leanne Mezuman, Nigel Sequeira, Alexander Sherman
Faculty of Engineering and Information Sciences - Papers: Part A
We prove that the classes of UHF algebras and AF algebras, while not axiomatizable, can be characterized as those C*-algebras that omit certain types in the logic of metric structures.
Disclosure-Protected Inference With Linked Microdata Using A Remote Analysis Server, James Chipperfield
Disclosure-Protected Inference With Linked Microdata Using A Remote Analysis Server, James Chipperfield
Faculty of Engineering and Information Sciences - Papers: Part A
Large amounts of microdata are collected by data custodians in the form of censuses and administrative records. Often, data custodians will collect different information on the same individual. Many important questions can be answered by linking microdata collected by different data custodians. For this reason, there is very strong demand from analysts, within government, business, and universities, for linked microdata. However, many data custodians are legally obliged to ensure the risk of disclosing information about a person or organisation is acceptably low. Different authors have considered the problem of how to facilitate reliable statistical inference from analysis of linked microdata …
Convexity Estimates For Hypersurfaces Moving By Convex Curvature Functions, Ben Andrews, Mat Langford, James A. Mccoy
Convexity Estimates For Hypersurfaces Moving By Convex Curvature Functions, Ben Andrews, Mat Langford, James A. Mccoy
Faculty of Engineering and Information Sciences - Papers: Part A
We consider the evolution of compact hypersurfaces by fully non-linear, parabolic curvature ows for which the normal speed is given by a smooth, convex, degree one homoge- neous function of the principal curvatures. We prove that solution hypersurfaces on which the speed is initially positive become weakly convex at a singularity of the ow. The result extends the convexity estimate [HS99b] of Huisken and Sinestrari for the mean curvature ow to a large class of speeds, and leads to an analogous description of `type-II' singularities. We remark that many of the speeds considered are positive on larger cones than the …
Factors Influencing Success In Chem101 At Uow, Becky Armstrong, Mark James Fielding, Stephen Kirk, Jacqui Ramagge
Factors Influencing Success In Chem101 At Uow, Becky Armstrong, Mark James Fielding, Stephen Kirk, Jacqui Ramagge
Faculty of Engineering and Information Sciences - Papers: Part A
In 2010 the Faculty of Science at the University of Wollongong (UOW) decided to inform its admissions policy by analysing the results in the introductory chemistry subject CHEM101. The data was analysed by members of the School of Mathematics and Applied Statistics using a generalised linear model. This paper discusses the model and its implications. One of the conclusions is that the level of mathematics studied for the Higher School Certificate (HSC) is a better predictor of performance in CHEM101 than either the HSC Chemistry mark or the student's Australian Tertiary Admission Rank. As a result of the analysis in …
Genome-Wide Delineation Of Natural Variation For Pod Shatter Resistance In Brassica Napus, Harsh Raman, Rosy Raman, Andrzej Kilian, Frank Detering, Jason Carling, Neil Coombes, Simon M. Diffey, G Kadkol, David Edwards, Margaret Mccully, Pradeep Ruperao, Isobel Parkin, Jacqueline Batley, David Luckett, Neil Wratten
Genome-Wide Delineation Of Natural Variation For Pod Shatter Resistance In Brassica Napus, Harsh Raman, Rosy Raman, Andrzej Kilian, Frank Detering, Jason Carling, Neil Coombes, Simon M. Diffey, G Kadkol, David Edwards, Margaret Mccully, Pradeep Ruperao, Isobel Parkin, Jacqueline Batley, David Luckett, Neil Wratten
Faculty of Engineering and Information Sciences - Papers: Part A
Resistance to pod shattering (shatter resistance) is a target trait for global rapeseed (canola, Brassica napus L.), improvement programs to minimise grain loss in the mature standing crop, and during windrowing and mechanical harvest. We describe the genetic basis of natural variation for shatter resistance in B. napus and show that several quantitative trait loci (QTL) control this trait. To identify loci underlying shatter resistance, we used a novel genotyping-by-sequencing approach DArT-Seq. QTL analysis detected a total of 12 significant QTL on chromosomes A03, A07, A09, C03, C04, C06, and C08; which jointly account for approximately 57% of the genotypic …
Effects Of Mesh Size And Escape Gaps On Discarding In An Australian Giant Mud Crab (Scylla Serrata) Trap Fishery, Matt Broadhurst, Paul Butcher, Brian R. Cullis
Effects Of Mesh Size And Escape Gaps On Discarding In An Australian Giant Mud Crab (Scylla Serrata) Trap Fishery, Matt Broadhurst, Paul Butcher, Brian R. Cullis
Faculty of Engineering and Information Sciences - Papers: Part A
In response to concerns over excessive discarding from Australian recreational round traps (with four funnel entrances) used to target giant mud crabs, Scylla serrata, an experiment was done to assess the independent and cumulative utility of paired, bottom-located horizontal escape gaps (46x120 mm) and increasing mesh size (from 51 to 101 mm). Compared to conventional traps comprising 51-mm mesh throughout, those with the same mesh size and escape gaps caught significantly fewer (by 95%) undersize (- CL) crabs while maintaining legal catches. Traps made from 101-mm mesh (but with the same funnel entrances as conventional designs) and with and without …
Grainscan: A Low Cost, Fast Method For Grain Size And Colour Measurements, Alex P. Whan, Alison Smith, C R. Cavanagh, Jean-Philippe F. Ral, Lindsay M. Shaw, Crispin A. Howitt, Leanne Bischof
Grainscan: A Low Cost, Fast Method For Grain Size And Colour Measurements, Alex P. Whan, Alison Smith, C R. Cavanagh, Jean-Philippe F. Ral, Lindsay M. Shaw, Crispin A. Howitt, Leanne Bischof
Faculty of Engineering and Information Sciences - Papers: Part A
Background: Measuring grain characteristics is an integral component of cereal breeding and research into genetic control of seed development. Measures such as thousand grain weight are fast, but do not give an indication of variation within a sample. Other methods exist for detailed analysis of grain size, but are generally costly and very low throughput. Grain colour analysis is generally difficult to perform with accuracy, and existing methods are expensive and involved. Results: We have developed a software method to measure grain size and colour from images captured with consumer level flatbed scanners, in a robust, standardised way. The accuracy …
Mathematics In A Connected World, Anne Porter
Mathematics In A Connected World, Anne Porter
Faculty of Engineering and Information Sciences - Papers: Part A
The issues confronting mathematics teachers remain as they have been for many years. How do you engage students who do not want to learn mathematics? How do you teach to students with varying abilities? How do you convey the relevance of mathematics? How do you engage students from different socioeconomic and ethnic groups? The questions all present as challenges. In a connected world there are many more options for addressing such challenges. The ease of creating and/or accessing learning resources in a connected world has enabled possibilities such as MOOCs, flipped classrooms, online learning, learning support programs and headstart programs. …
Minimisation Of Video Downstream Bit Rate For Large Scale Immersive Video Conferencing By Utilising The Perceptual Variations Of Quality, Pedram Pourashraf, Farzad Safaei, Daniel Franklin
Minimisation Of Video Downstream Bit Rate For Large Scale Immersive Video Conferencing By Utilising The Perceptual Variations Of Quality, Pedram Pourashraf, Farzad Safaei, Daniel Franklin
Faculty of Engineering and Information Sciences - Papers: Part A
This paper aims at minimising the video downstream bit rate of immersive video conferencing (IVC) applications by judiciously modifying the video quality based on the relative virtual positions of participants in the virtual environment. The paper reports on the results of a user study to assess the influence of participants' perspectives on the perceptual impact of relevant video parameters, such as resolution and frame rate. A mathematical model for video rate is proposed that expresses the total rate as the product of spatial resolution and frame rate. Results from the user study are combined with the proposed model to predict …
Potential Of Fluid Pressure Use For Achieving High Formability In Micro Sheet Forming Process, Hideki Sato, Kenichi Manabe, Dongbin Wei, Zhengyi Jiang, Daiki Kondo
Potential Of Fluid Pressure Use For Achieving High Formability In Micro Sheet Forming Process, Hideki Sato, Kenichi Manabe, Dongbin Wei, Zhengyi Jiang, Daiki Kondo
Faculty of Engineering and Information Sciences - Papers: Part A
This study decsribesa potential offluid pressure in micro hydromechanical deep drawingto achieve high formability. The FE simulation is carried out using the stainless steel foil with 50μm thickness. The friction holding effect can be obtained by applying the fluid pressure and it becomes high at high D p/t in MHDD. By applying the counter and radial pressure in MHDD, the desired lubrication condition can be obtained and the friction force can be reduced. By the friction holding effect and lubrication effect in MHDD, the micro cups can be successful fabricated in MHDD. Consequently, it is clarify that the fluid pressure …
Fault Approximation Tool For Grid-Connected Inverter-Interfaced Distributed Generators, Joel Kennedy, Philip Ciufo, Ashish Agalgaonkar
Fault Approximation Tool For Grid-Connected Inverter-Interfaced Distributed Generators, Joel Kennedy, Philip Ciufo, Ashish Agalgaonkar
Faculty of Engineering and Information Sciences - Papers: Part A
A novel fault approximation tool (FAT) is presented for use in distribution networks with a high penetration of inverter-interfaced distributed generation. The FAT does not rely on balanced operation nor an absolute reference point for voltage calculations, both of which are required for Newton-Raphson load flow calculations. Simulations show that the FAT provides an accurate representation of the transient and steady-state fault response for unbalanced faults when juxtaposed with a detailed small-signal model. The `sub-transient' response of the inverter-interfaced distributed generation is omitted to remove data considered extraneous from the perspective of distribution line protection analysis. The FAT is not …
Error Exponent Of Amplify And Forward Relay Networks In Presence Of I.I.D. Interferers, Bappi Barua, Farzad Safaei, Mehran Abolhasan
Error Exponent Of Amplify And Forward Relay Networks In Presence Of I.I.D. Interferers, Bappi Barua, Farzad Safaei, Mehran Abolhasan
Faculty of Engineering and Information Sciences - Papers: Part A
In this paper, we derive the random coding error exponent of amplify-and-forward (AF) relay networks in presence of arbitrary number of independent and identically distributed (i.i.d.) interferers both at the relay and the destination. Multiuser networks are common examples of interference limited networks. We derive the ergodic capacity of the network and present simulation results on the performance of the network where we compare the capacity and error exponent performance of interference limited networks with noise limited networks. Numerical results show that noise limited networks outperform interference limited networks even when only a very few interferers exist in the network.