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2019

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Articles 781 - 810 of 885

Full-Text Articles in Engineering

Full-Duplex Ofdm Relaying Systems With Energy Harvesting In Multipath Fading Channels, Jiaman Li, Le Chung Tran, Farzad Safaei Jan 2019

Full-Duplex Ofdm Relaying Systems With Energy Harvesting In Multipath Fading Channels, Jiaman Li, Le Chung Tran, Farzad Safaei

Faculty of Engineering and Information Sciences - Papers: Part B

In this paper, the performance of in-band fullduplex OFDM relaying systems with energy-harvesting and selfinterference cancellation in the polarization domain is analyzed. Specifically, we use the time switching-based relaying protocol to implement energy harvesting. The harvested energy is used by the relay to forward the transmitted information from the source. To cancel the self-interference, the polarization-enabled digital self-interference cancellation scheme is deployed at the relay. Our simulation results show that the full-duplex OFDM energy harvesting relaying system almost doubles the throughput, while maintaining the same bit error performance by a modest increase in the signal-to-noise ratio compared to the half-duplex …

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Phase-Specific Properties In A Low-Alloyed Trip Steel Investigated Using Correlative Nanoindentation Measurements And Electron Microscopy, Zhiping Xiong, Ahmed A. Saleh, Gilberto Casillas, Shaogang Cui, Elena V. Pereloma Jan 2019

Phase-Specific Properties In A Low-Alloyed Trip Steel Investigated Using Correlative Nanoindentation Measurements And Electron Microscopy, Zhiping Xiong, Ahmed A. Saleh, Gilberto Casillas, Shaogang Cui, Elena V. Pereloma

Faculty of Engineering and Information Sciences - Papers: Part B

Nanoindentation measurements of polygonal ferrite (PF), bainitic ferrite (BF) lath, ferrite in granular bainite (GB) and retained austenite (RA) in a low-alloyed multi-phase transformation-induced plasticity steel were carried out in conjunction with electron backscattering diffraction and scanning transmission electron microscopy (STEM). PF returned the lowest hardness followed by ferrite in GB, BF lath and RA. Dislocation glide and austenite-to-martensite transformation can be correlated with the first and second pop-in observed in the load-displacement curve, respectively. The martensite transformation induced by nanoindentation was demonstrated via correlative STEM. Film RA generally shows a higher stability than blocky RA, associated with a larger …

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A Study On The Local Corrosion Behavior And Mechanism Of Electroless Ni-P Coatings Under Flow By Using A Wire Beam Electrode, Yi-Rong Tang, Qin-Ying Wang, Rui Pei, Yu-Chen Xi, Li-Jin Dong, Shu-Lin Bai, Shanhong Wan Jan 2019

A Study On The Local Corrosion Behavior And Mechanism Of Electroless Ni-P Coatings Under Flow By Using A Wire Beam Electrode, Yi-Rong Tang, Qin-Ying Wang, Rui Pei, Yu-Chen Xi, Li-Jin Dong, Shu-Lin Bai, Shanhong Wan

Faculty of Engineering and Information Sciences - Papers: Part B

The local corrosion behavior and mechanism of Ni-P coatings in a 3.5 wt% sodium chloride solution with different flow speeds (0 m s-1, 0.5 m s-1, 1 m s-1) were investigated through a wire beam electrode (WBE) with morphological, elemental and electrochemical analyses as well as numerical simulations. It was found that the microstructure of the Ni-P coating was in the shape of broccoli and possessed satisfactory compactness and uniformity. The numerical simulations showed that the speed increased and the static pressure decreased at the local area. Combined with WBE, it was found that …

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A Combination Of Keyhole Gtaw With A Trapezoidal Interlayer: A New Insight Into Armour Steel Welding, Zhenyu Fei, Zengxi Stephen Pan, Dominic Cuiuri, Hui Jun Li, Azdiar Adil Gazder Jan 2019

A Combination Of Keyhole Gtaw With A Trapezoidal Interlayer: A New Insight Into Armour Steel Welding, Zhenyu Fei, Zengxi Stephen Pan, Dominic Cuiuri, Hui Jun Li, Azdiar Adil Gazder

Faculty of Engineering and Information Sciences - Papers: Part B

The ballistic performance of armour steel welds using austenitic filler materials is poor on account of the disparity in the mechanical properties of the weld and base metals. Consequently, a novel Keyhole Gas Tungsten ArcWelding process with a trapezoidal AISI309 austenitic stainless steel interlayer was developed to tailor chemical composition and microstructure by controlling the solidification sequence. Results show that the dilution rate in the weld metal region can reach up to 43.5% by placing a specially designed interlayer in between the base metal, providing a major scope for microstructure modification. Detailed weld analysis was undertaken by X-ray diffraction, optical …

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In-Situ Cu Coating On Steel Surface After Oxidizing At High Temperature, Na Li, Ruizhi Jia, Hongmei Zhang, Wei Sha, Yan Li, Zhengyi Jiang Jan 2019

In-Situ Cu Coating On Steel Surface After Oxidizing At High Temperature, Na Li, Ruizhi Jia, Hongmei Zhang, Wei Sha, Yan Li, Zhengyi Jiang

Faculty of Engineering and Information Sciences - Papers: Part B

Almost all copper in scrap steel is recovered, so research on copper-bearing steel has profound practical significance. The surface enrichment of copper occurs in all copper-bearing steels studied in this paper after being heated at high temperature. In-situ oxidation-induced copper coatings were discovered on the descaled copper-bearing steels after heating at around 1150 °C for 2 h in air. Scattered copper precipitates in or under rust after heating at a lower temperature. A new concept was created using in-situ composites prepared by direct oxidation of matrix, and there was no bonding problem found between the coating and the matrix. The …

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3d Printable Linear Soft Vacuum Actuators: Their Modeling, Performance Quantification And Application In Soft Robotic Systems, Charbel Tawk, Geoffrey M. Spinks, Marc In Het Panhuis, Gursel Alici Jan 2019

3d Printable Linear Soft Vacuum Actuators: Their Modeling, Performance Quantification And Application In Soft Robotic Systems, Charbel Tawk, Geoffrey M. Spinks, Marc In Het Panhuis, Gursel Alici

Faculty of Engineering and Information Sciences - Papers: Part B

Conventional robotic systems have proved their versatility in the industry where complex tasks requiring high force, high speed and high precision are desired. However, these rigid-bodied systems cannot collaborate safely with humans. Soft robots which are primarily made of highly compliant materials bring robots and humans together by operating safely in unstructured environments. Soft robots demand dexterous soft actuators that preserve or enhance their softness and safety features. This article reports on modeling, performance quantification, and soft robotic applications of directly three-dimensional (3-D) printed linear soft vacuum actuators (LSOVA), that are manufactured in a single step, using a low-cost and …

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Mechanical Properties Of Aluminium Metal Matrix Nanocomposites Manufactured By Assisted-Flake Powder Thixoforming Process, Saud Almotairy, Alireza Fadavi Boostani, M Hassani, Dongbin Wei, Zhengyi Jiang Jan 2019

Mechanical Properties Of Aluminium Metal Matrix Nanocomposites Manufactured By Assisted-Flake Powder Thixoforming Process, Saud Almotairy, Alireza Fadavi Boostani, M Hassani, Dongbin Wei, Zhengyi Jiang

Faculty of Engineering and Information Sciences - Papers: Part B

This study discusses the superior effect of thixoforming process on enhancing the tensile properties of aluminium matrix composite produced using flake metallurgy route. The flake metallurgy process was utilised to manufacture aluminium matrix composites followed by thixoforming process. Microstructural investigations carried out using transmission electron microscope have shown the synergic effect of thixoforming process on rendering uniform distribution of SiC nanoparticles associated with lower porosity content. X-ray diffraction characterisations have revealed the promising effect of uniform dispersion of SiC nanoparticles on restricting the grain growth of aluminium matrix within nanoscale regime (90 nm) even at high semi-solid thixoforming temperatures (575 …

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Robust Adaptive Sliding Mode Pi Control For Active Vehicle Seat Suspension Systems, Wenxing Li, Haiping Du, Donghong Ning, Weihua Li Jan 2019

Robust Adaptive Sliding Mode Pi Control For Active Vehicle Seat Suspension Systems, Wenxing Li, Haiping Du, Donghong Ning, Weihua Li

Faculty of Engineering and Information Sciences - Papers: Part B

In this paper, a robust adaptive sliding mode proportional integral control (RASMPIC) method is proposed for an active vehicle seat suspension system, where the driver's mass is supposed as an unknown parameter with boundaries. A dynamic active seat suspension system is established at first. Then a sliding mode controller (SMC) is designed to achieve the required ride comfort performance based on the driver's mass estimated by utilizing an adaptive law where a projecting adaptive algorithm is used to prevent the estimated parameters from surpassing their boundaries to enhance the robustness of the seat suspension system. Also, a proportional and integral …

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Flexible Surface Electrodes Targeting Biopotential Signals From Forearm Muscles For Control Of Prosthetic Hands: Part 1 - Characterisation Of Semg Electrodes, Siobhan O'Brien, Thomas Searle, Gursel Alici Jan 2019

Flexible Surface Electrodes Targeting Biopotential Signals From Forearm Muscles For Control Of Prosthetic Hands: Part 1 - Characterisation Of Semg Electrodes, Siobhan O'Brien, Thomas Searle, Gursel Alici

Faculty of Engineering and Information Sciences - Papers: Part B

This study is Part 1 of two studies which investigate the use of various flexible surface sensors as an alternative to the gold standard Ag/AgCl surface electromyography (sEMG) electrodes in identifying movement intention from a user during common hand gestures. Three conductive textiles, two commercial conductive elastomers and one E-skin elastomer produced on site were tested as biopotential electrodes to establish the efficacy of each in gathering movement intention from the human brain at the level of the muscle. Testing was performed in vivo on two participants across three hand gestures, with results demonstrating that sEMG electrodes made from a …

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Flexible Surface Electrodes Targeting Biopotential Signals From Forearm Muscles For Control Of Prosthetic Hands: Part 2 - Characterization Of Substrates For Strain Sensors, Siobhan O'Brien, Thomas Searle, Gursel Alici Jan 2019

Flexible Surface Electrodes Targeting Biopotential Signals From Forearm Muscles For Control Of Prosthetic Hands: Part 2 - Characterization Of Substrates For Strain Sensors, Siobhan O'Brien, Thomas Searle, Gursel Alici

Faculty of Engineering and Information Sciences - Papers: Part B

This study investigates the use of stretchable strain sensors as an alternative to the gold standard Ag/AgCl surface electromyography (sEMG) electrodes currently utilised to identify movement intention from a user during common hand gestures. Further building on the research in the companion paper, this study documents a series of strain characterisation experiments undertaken on three conductive textiles, two commercial conductive elastomers and one E-skin elastomer produced on site to determine the linearity of each sensor, along with the magnitude of hysteresis in a single stretch and release cycle, and any creep effects present. Gesture identification testing was performed in vivo …

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Fully 3d Printed Monolithic Soft Gripper With High Conformal Grasping Capability, Charbel Tawk, Yuan Gao, Rahim Mutlu, Gursel Alici Jan 2019

Fully 3d Printed Monolithic Soft Gripper With High Conformal Grasping Capability, Charbel Tawk, Yuan Gao, Rahim Mutlu, Gursel Alici

Faculty of Engineering and Information Sciences - Papers: Part B

The recent advances in material science and engineering disciplines have had a significant impact on the robotics field where numerous bioinspired soft robots have been developed. Roboticists can now develop and fabricate soft robotic systems made of materials with low elasticity using additive manufacturing technologies. One of the most studied classes of soft robotic systems is soft adaptive grippers. In this work, we present a novel fully 3D printed soft pneumatic gripper that incorporates a novel design of soft pneumatic chambers and a bioinspired fin-ray structure for conformal grasping. The soft gripper was printed in a single step using a …

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Secondary Students' Ideas About Scientific Concepts Underlying Climate Change, Lorna E. Jarrett, George J. Takacs Jan 2019

Secondary Students' Ideas About Scientific Concepts Underlying Climate Change, Lorna E. Jarrett, George J. Takacs

Faculty of Engineering and Information Sciences - Papers: Part B

We present ideas about concepts underlying climate change, held by students in years 9 and 10. Misconceptions about climate change are common among students, and may be due to misconceptions about underlying concepts. To investigate this, we developed the Climate Change Concept Inventory (CCCI), and trialed it with 229 students; corroborating findings through focus group interviews. Our interview method and data analysis methods are described. Findings included overestimation of human contributions to atmospheric carbon inputs, ultra violet radiation in sunlight, and greenhouse gases in the atmosphere. Students were unaware that CO2 dissolves in water, and of the role of oceans …

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Evaluation Of Different B-Values In Dwi And 1h Mrs For Pancreatic Cancer And Pancreatitis: A Rabbit Model, Liguo Hao, Lijie Liu, Xin Meng, Guanghao Yu, Enbang Li, Hongqian Gu Jan 2019

Evaluation Of Different B-Values In Dwi And 1h Mrs For Pancreatic Cancer And Pancreatitis: A Rabbit Model, Liguo Hao, Lijie Liu, Xin Meng, Guanghao Yu, Enbang Li, Hongqian Gu

Faculty of Engineering and Information Sciences - Papers: Part B

Pancreatic cancer is a common malignant tumor with high incidence of metastasis. Currently, there is no absolute standard for the choice of b-value for diffusion-weighted imaging (DWI) for pancreatic cancer. The b-value is rarely reported in animal model study, especially in pancreatic cancer/mass pancreatitis rabbit models. The authors' aim was to determine the different b-values to differentiate the diagnosis of pancreatic cancer and mass pancreatitis in rabbit models using DWI. When comparing the effect of different b-values in diagnostic process, the pathological results could be regarded as the gold standard. In this research, 30 healthy New Zealand rabbits were selected …

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On Matrix Completion-Based Channel Estimators For Massive Mimo Systems, Mingjun Ding, Xiaodong Yang, Rui Hu, Zhitao Xiao, Jun Tong, Jiangtao Xi Jan 2019

On Matrix Completion-Based Channel Estimators For Massive Mimo Systems, Mingjun Ding, Xiaodong Yang, Rui Hu, Zhitao Xiao, Jun Tong, Jiangtao Xi

Faculty of Engineering and Information Sciences - Papers: Part B

Large-scale symmetric arrays such as uniform linear arrays (ULA) have been widely used in wireless communications for improving spectrum efficiency and reliability. Channel state information (CSI) is critical for optimizing massive multiple-input multiple-output(MIMO)-based wireless communication systems. The acquisition of CSI for massive MIMO faces challenges such as training shortage and high computational complexity. For millimeter wave MIMO systems, the low-rankness of the channel can be utilized to address the challenge of training shortage. In this paper, we compared several channel estimation schemes based on matrix completion (MC) for symmetrical arrays. Performance and computational complexity are discussed and compared. By comparing …

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Beach Safety: Can Drones Provide A Platform For Sighting Sharks?, Paul A. Butcher, Toby Piddocke, Andrew Colefax, Brent Hoade, Victor M. Peddemors, Lauren Borg, Brian R. Cullis Jan 2019

Beach Safety: Can Drones Provide A Platform For Sighting Sharks?, Paul A. Butcher, Toby Piddocke, Andrew Colefax, Brent Hoade, Victor M. Peddemors, Lauren Borg, Brian R. Cullis

Faculty of Engineering and Information Sciences - Papers: Part B

CSIRO 2019 Open Access. Context: A series of unprovoked shark attacks on New South Wales (Australia) beaches between 2013 and 2015 triggered an investigation of new and emerging technologies for protecting bathers. Traditionally, bather protection has included several methods for shark capture, detection and/or deterrence but has often relied on environmentally damaging techniques. Heightened environmental awareness, including the important role of sharks in the marine ecosystem, demands new techniques for protection from shark attack. Recent advances in drone-related technologies have enabled the possibility of real-time shark detection and alerting. Aim: To determine the reliability of drones to detect shark analogues …

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Vibration Control Of A Tunnel Boring Machine Using Adaptive Magnetorheological Damper, Bo Yang, Shuaishuai Sun, Lei Deng, Tianhe Jin, Weihua Li, He Li Jan 2019

Vibration Control Of A Tunnel Boring Machine Using Adaptive Magnetorheological Damper, Bo Yang, Shuaishuai Sun, Lei Deng, Tianhe Jin, Weihua Li, He Li

Faculty of Engineering and Information Sciences - Papers: Part B

With a large number of tunnel boring machines (TBM) being used in various tunnel constructions, the vibration problem under complex geological conditions have become increasingly prominent. In order to solve the problem, this article investigates the application of an adaptive magnetorheological (MR) damper on the vibration reduction of a TBM. The MR damper could reduce the horizontal vibration of the TBM system and adjust its dragging force on the propulsive system under different geological conditions. The MR damper can also provide large enough damping force even under a small amplitude vibration, which is required by TBM. In this paper, an …

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Effect Of Hot Isostatic Pressing On The Mechanical Properties Of Aluminium Metal Matrix Nanocomposites Produced By Dual Speed Ball Milling, Saud Almotairy, Alireza Fadavi Boostani, M Hassani, D Wei, Zhengyi Jiang Jan 2019

Effect Of Hot Isostatic Pressing On The Mechanical Properties Of Aluminium Metal Matrix Nanocomposites Produced By Dual Speed Ball Milling, Saud Almotairy, Alireza Fadavi Boostani, M Hassani, D Wei, Zhengyi Jiang

Faculty of Engineering and Information Sciences - Papers: Part B

2019 The Authors. In this study a suggested model for flake powder metallurgy were implemented and its mechanism was explained. The suggested model includes dual-speed ball milling (DSBM) to take the advantage of the low-speed and high-speed ball milling (LSBM and HSBM). The modelled process was utilised to uniformly disperse SiC nanoparticles into aluminium metal matrix to produce nanocomposites. The produced mixed powder was hot isostatically pressed. The effects of processing parameters such as stearic acid content, SiC volume content, ball milling speed and time on the microstructure and consequently tensile properties of the manufactured composites have been investigated experimentally …

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Effect Of Heat Input On Weld Formation And Tensile Properties In Keyhole Mode Tig Welding Process, Zhenyu Fei, Zengxi Stephen Pan, Dominic Cuiuri, Hui Jun Li, Bintao Wu, Donghong Ding, Lihong Su Jan 2019

Effect Of Heat Input On Weld Formation And Tensile Properties In Keyhole Mode Tig Welding Process, Zhenyu Fei, Zengxi Stephen Pan, Dominic Cuiuri, Hui Jun Li, Bintao Wu, Donghong Ding, Lihong Su

Faculty of Engineering and Information Sciences - Papers: Part B

2019 by the authors. Licensee MDPI, Basel, Switzerland. Keyhole mode Tungsten Inert Gas (K-TIG) welding is a novel advanced deep penetration welding technology which provides an alternative to high power density welding in terms of achieving keyhole mode welding. In order to facilitate welding procedure optimisation in this newly developed welding technology, the relationship among welding parameters, weld formation and tensile properties during the K-TIG welding was investigated in detail. Results show that except for travel speed, the heat input level also plays an important role in forming undercut defect by changing the plasma jet trajectory inside keyhole channel, leading …

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Lattice-Based Ibe With Equality Test In Standard Model, Dung Hoang Duong, Quoc Huy Le, Partha Sarathi Roy, Willy Susilo Jan 2019

Lattice-Based Ibe With Equality Test In Standard Model, Dung Hoang Duong, Quoc Huy Le, Partha Sarathi Roy, Willy Susilo

Faculty of Engineering and Information Sciences - Papers: Part B

Public key encryption with equality test (PKEET) allows the testing of equality of underlying messages of two ciphertexts. PKEET is a potential candidate for many practical applications like efficient data management on encrypted databases. Identity-based encryption scheme with equality test (IBEET), which was introduced by Ma (Information Science 2016), can simplify the certificate management of PKEET. Potential applicability of IBEET leads to intensive research from its first instantiation. Ma’s IBEET and most of the constructions are proven secure in the random oracle model based on number-theoretic hardness assumptions which are vulnerable in the post-quantum era. Recently, Lee et al. (ePrint …

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Helping An Agent Reach A Different Goal By Action Transfer In Reinforcement Learning, Yuchen Wang, Fenghui Ren, Minjie Zhang Jan 2019

Helping An Agent Reach A Different Goal By Action Transfer In Reinforcement Learning, Yuchen Wang, Fenghui Ren, Minjie Zhang

Faculty of Engineering and Information Sciences - Papers: Part B

© 2019, Springer Nature Switzerland AG. Reinforcement learning agents can be helped by the knowledge transferred from experienced agents. This paper studies the problem of how an experienced agent helps another agent learn when they have different learning goals by action transfer. This problem is motivated by the widely existing situations where agents have different learning goals and only action transfer is available to agents. To tackle the problem, we propose an approach to facilitate the transfer of actions that are right to a learning agent’s goal. Experimental results show the effectiveness of the proposed approach in transferring right actions …

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Using Freivalds’ Algorithm To Accelerate Lattice-Based Signature Verifications, Arnaud Sipasseuth, Thomas Plantard, Willy Susilo Jan 2019

Using Freivalds’ Algorithm To Accelerate Lattice-Based Signature Verifications, Arnaud Sipasseuth, Thomas Plantard, Willy Susilo

Faculty of Engineering and Information Sciences - Papers: Part B

© Springer Nature Switzerland AG, 2019. We present a novel computational technique to check whether a matrix-vector product is correct with a relatively high probability. While the idea could be related to verifiable delegated computations, most of the literature in this line of work focuses on provably secure functional aspects and do not provide clear computational techniques to verify whether a product $$xA = y$$ is correct where x, A and y are not given nor computed by the party which requires validity checking: this is typically the case for some cryptographic lattice-based signature schemes. This paper focuses on the …

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Soi Thin Microdosimeters For High Let Single Event Upset Studies In Fe, O, Xe And Cocktail Ion Beam Fields, Benjamin James, Linh T. Tran, David Bolst, Stefania Peracchi, Jeremy A. Davis, Dale A. Prokopovich, Susanna Guatelli, Marco Petasecca, Michael L. F Lerch, Marco Povoli, Angela Kok, Marc Goethem, Mitchell John Bromley Nancarrow, Naruhiro Matsufuji, Michael A. Jackson, Anatoly B. Rosenfeld Jan 2019

Soi Thin Microdosimeters For High Let Single Event Upset Studies In Fe, O, Xe And Cocktail Ion Beam Fields, Benjamin James, Linh T. Tran, David Bolst, Stefania Peracchi, Jeremy A. Davis, Dale A. Prokopovich, Susanna Guatelli, Marco Petasecca, Michael L. F Lerch, Marco Povoli, Angela Kok, Marc Goethem, Mitchell John Bromley Nancarrow, Naruhiro Matsufuji, Michael A. Jackson, Anatoly B. Rosenfeld

Faculty of Engineering and Information Sciences - Papers: Part B

The response of a 5 lm thin silicon on insulator (SOI) 3D microdosimeter was investigated for single event upset applications by measuring the LET of different high LET ions. The charge collection characteristics of the device was performed using the Ion Beam Induced Charge collection (IBIC) technique with 3 and 5.5 MeV He2+ ions incident on the microdosimeter. The microdosimeter was irradiated with 16O, 56Fe and 124Xe ions and was able to determine the LET within 5% for most configurations apart from 124Xe. It was observed that on average, measured LET was 12% lower for 30 MeV/u 124Xe ion traversing …

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A Novel Quality Assurance System For Eye Plaque Brachytherapy, Alannah Kejda, Dean L. Cutajar, Michael R. Weaver, Marco Petasecca, Anatoly B. Rosenfeld Jan 2019

A Novel Quality Assurance System For Eye Plaque Brachytherapy, Alannah Kejda, Dean L. Cutajar, Michael R. Weaver, Marco Petasecca, Anatoly B. Rosenfeld

Faculty of Engineering and Information Sciences - Papers: Part B

Eye Plaque brachytherapy pre-treatment quality assurance (QA) conducted clinically involves an activity verification of individual seeds via well chamber and does not include a physical measurement of dose-rate of the final assembly. A novel spectroscopic, dose-rate detection system, was evaluated for pre-treatment QA of eye plaque brachytherapy. The system includes a water phantom with sterility management. The system was calibrated using a known-activity I-125 seed, measured at 1 cm in water along the radial axis, compared to TG-43 U1 calculations and verified over a number of distances. A depth dose curve was acquired for a clinical, mixed activity eye plaque …

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Validation Of A Monte Carlo Simulation For Microbeam Radiation Therapy On The Imaging And Medical Beamline At The Australian Synchrotron, Andrew Dipuglia, Matthew Cameron, Jeremy A. Davis, Iwan Cornelius, Andrew W. Stevenson, Anatoly B. Rosenfeld, Marco Petasecca, Stephanie Corde, Susanna Guatelli, Michael L. F Lerch Jan 2019

Validation Of A Monte Carlo Simulation For Microbeam Radiation Therapy On The Imaging And Medical Beamline At The Australian Synchrotron, Andrew Dipuglia, Matthew Cameron, Jeremy A. Davis, Iwan Cornelius, Andrew W. Stevenson, Anatoly B. Rosenfeld, Marco Petasecca, Stephanie Corde, Susanna Guatelli, Michael L. F Lerch

Faculty of Engineering and Information Sciences - Papers: Part B

Microbeam Radiation Therapy (MRT) is an emerging cancer treatment modality characterised by the use of high-intensity synchrotron-generated x-rays, spatially fractionated by a multi-slit collimator (MSC), to ablate target tumours. The implementation of an accurate treatment planning system, coupled with simulation tools that allow for independent verification of calculated dose distributions are required to ensure optimal treatment outcomes via reliable dose delivery. In this article we present data from the first Geant4 Monte Carlo radiation transport model of the Imaging and Medical Beamline at the Australian Synchrotron. We have developed the model for use as an independent verification tool for experiments …

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Bearing Corrosion Failure Diagnosis Of Doubly-Fed Induction Generator In Wind Turbines Based On Stator Current Analysis, Xi Chen, Wei Xu, Yi Liu, Md Rabiul Islam Jan 2019

Bearing Corrosion Failure Diagnosis Of Doubly-Fed Induction Generator In Wind Turbines Based On Stator Current Analysis, Xi Chen, Wei Xu, Yi Liu, Md Rabiul Islam

Faculty of Engineering and Information Sciences - Papers: Part B

IEEE Bearing failure often occurs in doubly-fed induction generator (DFIG)-based wind turbines which are usually subject to electrical corrosion effects. Fault diagnosis method based on electrical signals has been paid much attention as the method is non-invasive and cost-effective. This paper describes the use of the modulation signal bispectrum (MSB) detector for diagnosing bearing faults in DFIGs of wind turbines. The major theoretical principles involved with the MSB method are presented and it is shown how the amplitude and phase relationships of the stator current signals caused by torque oscillations can be effectively revealed. Since the MSB result is obtained …

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A Numerical Approach To Design The Kretschmann Configuration Based Refractive Index Graphene-Mos2 Hybrid Layers With Tio2-Sio2 Nano For Formalin Detection, Md. Biplob Hossain, Tamanna Tasnim, Lway Abdulrazak, Md Masud Rana, Md Rabiul Islam Jan 2019

A Numerical Approach To Design The Kretschmann Configuration Based Refractive Index Graphene-Mos2 Hybrid Layers With Tio2-Sio2 Nano For Formalin Detection, Md. Biplob Hossain, Tamanna Tasnim, Lway Abdulrazak, Md Masud Rana, Md Rabiul Islam

Faculty of Engineering and Information Sciences - Papers: Part B

In this paper, a Kretschmann configuration based surface plasmon resonance (SPR) sensor is numerically designed using graphene-MoS2 hybrid structure TiO2-SiO2 nano particles for formalin detection. In this design, the observations of SPR angle versus minimum reflectance and SPR frequency (FSPR) versus maximum transmittance (Tmax) are considered. The chitosan is used as probe legend to perform reaction with the formalin (40% formaldehyde) which acts as target legend. In this paper, both graphene and MoS2 are used as biomolecular acknowledgment element (BAE) and TiO2 as well as SiO2 bilayers is used to improve the sensitivity of the sensor. The numerical results show …

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Analog Least Mean Square Loop For Self-Interference Cancellation: Implementation And Measurements, Anh Tuyen Le, Le Chung Tran, Xiaojing Huang, Y. Jay Guo Jan 2019

Analog Least Mean Square Loop For Self-Interference Cancellation: Implementation And Measurements, Anh Tuyen Le, Le Chung Tran, Xiaojing Huang, Y. Jay Guo

Faculty of Engineering and Information Sciences - Papers: Part B

Analog least mean square (ALMS) loop is a simple and efficient adaptive filter to cancel self-interference (SI) in in-band full-duplex (IBFD) radios. This paper proposes a practical structure and presents an implementation of the ALMS loop. By employing off-the-shelf components, a prototype of the ALMS loop including two taps is implemented. The prototype is evaluated in IBFD systems which have 20 MHz and 50 MHz bandwidths, respectively, with the carrier frequency of 2.4 GHz. The performance of the prototype with different roll-off factors of the transmit pulse shaping filter is also examined. Experimental results show that the ALMS loop can …

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Ftn Signaling-Aided Space-Time Multi-Mode Index Modulation Systems With A Gmp-Based Receiver, Shaoang Li, Nan Wu, Qiaolin Shi, Qinghua Guo Jan 2019

Ftn Signaling-Aided Space-Time Multi-Mode Index Modulation Systems With A Gmp-Based Receiver, Shaoang Li, Nan Wu, Qiaolin Shi, Qinghua Guo

Faculty of Engineering and Information Sciences - Papers: Part B

In this paper, we propose a faster-than-Nyquist (FTN) signaling-aided space-time multi-mode index modulation (IM) scheme with a low-complexity Gaussian message passing (GMP) based receiver. The advantages of spatial domain IM, time-domain IM relying on multiple modes and FTN signaling are explored. Specifically, multi-mode IM is employed in time domain by activating all time slots, hence the spectral efficiency is improved substantially compared to its single-mode counterpart. Meanwhile, the transmission rate is further increased by utilizing FTN signaling. At the receiver, based on the state-space model of IM symbols, a two-layer Forney style factor graph (FG) representation for the system is …

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Scattering Transform Framework For Unmixing Of Hyperspectral Data, Yiliang Zeng, Christian H. Ritz, Jiahong Zhao, Jinhui Lan Jan 2019

Scattering Transform Framework For Unmixing Of Hyperspectral Data, Yiliang Zeng, Christian H. Ritz, Jiahong Zhao, Jinhui Lan

Faculty of Engineering and Information Sciences - Papers: Part B

2019 by the authors. The scattering transform, which applies multiple convolutions using known filters targeting different scales of time or frequency, has a strong similarity to the structure of convolution neural networks (CNNs), without requiring training to learn the convolution filters, and has been used for hyperspectral image classification in recent research. This paper investigates the application of the scattering transform framework to hyperspectral unmixing (STFHU). While state-of-the-art research on unmixing hyperspectral data utilizing scattering transforms is limited, the proposed end-to-end method applies pixel-based scattering transforms and preliminary three-dimensional (3D) scattering transforms to hyperspectral images in the remote sensing scenario …

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A Method For Dynamic 3d Shape Measurements Based On Multiple-Shot Ftp And Motion Compensation, Chengpu Duan, Jun Tong, Jiangtao Xi, Yiwei Zhang, Yanguang Yu, Qinghua Guo, Lei Lu Jan 2019

A Method For Dynamic 3d Shape Measurements Based On Multiple-Shot Ftp And Motion Compensation, Chengpu Duan, Jun Tong, Jiangtao Xi, Yiwei Zhang, Yanguang Yu, Qinghua Guo, Lei Lu

Faculty of Engineering and Information Sciences - Papers: Part B

2019 SPIE. Fringe projection profilometry (FPP) has attracted considerable interests for addressing the challenge of measuring three-dimension (3D) shapes of moving objects. Compared with phase shift profilometry (PSP) which requires the capture of multiple fringe patterns and is thus only suitable for static objects, Fourier transform profilometry (FTP) is less sensitive to motion-induced errors. However, FTP is prone to the influence of background lights and variations of the surface reflectivity, which may result in less accurate measurements. There are studies aimed to reduce the measurement errors with FTP using more sophisticated processing of the fringe patterns. However, existing works focus …

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