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Articles 31 - 60 of 579
Full-Text Articles in Social and Behavioral Sciences
Photonic Chip Based Tunable And Reconfigurable Narrowband Microwave Photonic Filter Using Stimulated Brillouin Scattering, Adam Byrnes, Ravi Pant, Enbang Li, Duk-Yong Choi, Christopher G. Poulton, Shanhui Fan, Steve J. Madden, Barry Luther-Davies, Benjamin J. Eggleton
Photonic Chip Based Tunable And Reconfigurable Narrowband Microwave Photonic Filter Using Stimulated Brillouin Scattering, Adam Byrnes, Ravi Pant, Enbang Li, Duk-Yong Choi, Christopher G. Poulton, Shanhui Fan, Steve J. Madden, Barry Luther-Davies, Benjamin J. Eggleton
Faculty of Engineering and Information Sciences - Papers: Part A
We report the first demonstration of a photonic chip based dynamically reconfigurable, widely tunable, narrow pass-band, high Q microwave photonic filter (MPF). We exploit stimulated Brillouin scattering (SBS) in a 6.5 cm long chalcogenide (As2S3) photonic chip to demonstrate a MPF that exhibited a high quality factor of ~520 and narrow bandwidth and was dynamically reconfigurable and widely tunable. It maintained a stable 3 dB bandwidth of 23 ± 2MHz and amplitude of 20 ± 2 dB over a large frequency tuning range of 2-12 GHz. By tailoring the pump spectrum, we reconfigured the 3 dB bandwidth of the MPF …
A Note On Asymptotic Exponential Arbitrage With Exponentially Decaying Failure Probability, Kai Du, Ariel Neufeld
A Note On Asymptotic Exponential Arbitrage With Exponentially Decaying Failure Probability, Kai Du, Ariel Neufeld
Faculty of Engineering and Information Sciences - Papers: Part A
The goal of this paper is to prove a result conjectured in Follmer and Schachermayer (2007) in a slightly more general form. Suppose that S is a continuous semimartingale and satisfies a large deviations estimate; this is a particular growth condition on the mean-variance tradeoff process of S. We show that S then allows asymptotic exponential arbitrage wiith exponentially decaying failure probability, which is a strong and quantitative form of long-term arbitrage. In contrast to Follmer and Schachermayer (2007), our result does not assume that S is a diffusion, nor does it need any ergodicity assumption.
Asset Management In The Energy Pipeline Industry In Australia, Richard Dwight, Tieling Zhang, Khaled O. El-Akruti
Asset Management In The Energy Pipeline Industry In Australia, Richard Dwight, Tieling Zhang, Khaled O. El-Akruti
Faculty of Engineering and Information Sciences - Papers: Part A
A review of asset management systems within the context of energy pipelines has been conducted. It covers available methodologies, current asset management systems, opportunities for improvement and research challenges. A particular point of interest is the degree to which consideration of remaining life and the influence of maintenance activities are used to drive the asset management strategy. Asset management within the energy pipeline industry is mostly concerned with integrity assurance. Irrespective of this overriding goal, cost of delivery is also of concern. At any point of the service life the remaining life of the pipeline at an acceptable level of …
Agency In Transport Service: Implications Of Traveller Mode Choice Objective And Latent Attributes Using Random Parameter Logit Model, Ahm Mehbub Anwar, A Kiet Tieu, Peter Gibson, Khin Than Win, Matthew J. Berryman
Agency In Transport Service: Implications Of Traveller Mode Choice Objective And Latent Attributes Using Random Parameter Logit Model, Ahm Mehbub Anwar, A Kiet Tieu, Peter Gibson, Khin Than Win, Matthew J. Berryman
Faculty of Engineering and Information Sciences - Papers: Part A
This paper explains how principal-agent theory (PAT) can be used as an analytical tool to understand the traveller-Transport for NSW relationship and minimise the agency uncertainty in the relationship by examining traveller preferences for mode choices. The paper emphasises latent variables and objective attributes together during the choice process within the agency relationship, as a method by which the utility of the principal (traveller) can be maximised and evaluated using a discrete choice experiment, i.e. random parameter logit (RPL) model. The probability of car useis significantly higher than public transport, which indicates that an agency uncertainty exists in the relationship …
Fabrication And Characterization Of A Polymer Micro-Fiber Bragg Grating, Ginu Rajan, Gang-Ding Peng
Fabrication And Characterization Of A Polymer Micro-Fiber Bragg Grating, Ginu Rajan, Gang-Ding Peng
Faculty of Engineering and Information Sciences - Papers: Part A
Polymer micro-fibers with inscribed Bragg gratings are reported in this paper. By implementing a two-stage fabrication process a 16 μm diameter micro-fiber is fabricated with an inscribed 10 mm long Bragg grating which exhibits a peak reflected wavelength circa 1530 nm. The growth dynamics of the polymer micro-fiber Bragg grating are also observed and analyzed. A maximum reflectivity of 5% is obtained after an exposure time of 3 minutes to a 50 mW power He-Cd laser of 325 nm wavelength. The temperature characterization of the micro-fiber Bragg grating with different diameters is also presented. The fabricated micro-fiber Bragg grating can …
Performance Uniformity Evaluation Of Two Sensl's Sipm Modules, Lachlan Chartier, Yujin Qi, Marco Petasecca, Peter Ihnat, Michael L. F Lerch, Anatoly B. Rosenfeld, Benjamin Tsui
Performance Uniformity Evaluation Of Two Sensl's Sipm Modules, Lachlan Chartier, Yujin Qi, Marco Petasecca, Peter Ihnat, Michael L. F Lerch, Anatoly B. Rosenfeld, Benjamin Tsui
Faculty of Engineering and Information Sciences - Papers: Part A
Minimization of the channel-to-channel variation of silicon photomultiplier (SiPM) array is of great importance in achieving high performance for SiPM based imaging detectors. The purpose of this study was to characterize the operating parameters of a large-area SiPM based detector module with 12x12 pixel array (SensL's ArraySM-4P9) in order to develop an optimal multiplexing readout for high-resolution SPECT imaging. Two versions of SensL's SiPM arrays were investigated in this study. The previous ArraySL-4 version has an array of 4x4 pixels with 3x3mm2 pixel size and the new AarraySM-4p9 version consists of a 3x3 matrix of the 4x4 pixels SiPM modules. …
Effects Of Geosynthetic Reinforcement On Performance Of Ballasted Rail Track, Pongpipat Anantanasakul, Buddhima Indraratna, Sanjay S. Nimbalkar, Tim Neville
Effects Of Geosynthetic Reinforcement On Performance Of Ballasted Rail Track, Pongpipat Anantanasakul, Buddhima Indraratna, Sanjay S. Nimbalkar, Tim Neville
Faculty of Engineering and Information Sciences - Papers: Part A
The 'field' performance of different geosynthetics to reinforce ballasted rail tracks was investigated. An extensive monitoring program was undertaken on fully instrumented track sections constructed near Singleton, New South Wales. Four types of geosynthetics were installed at the ballast-subballast interface of track sections located on subgrades with three distinctly different values of stiffness. It was found that geogrids could decrease vertical settlements of the ballast layer with obvious benefits of improved track stability and decreased maintenance cost. It was also found that the effectiveness of reinforcing geogrids increased when the subgrade stiffness decreased. Keywords: Geosynthetic, Reinforcement, Rail track, Ballast.
A Model Of The Effects Of Authority On Consensus Formation In Adaptive Networks: Impact On Network Topology And Robustness, Brenton J. Prettejohn, Matthew J. Berryman, Mark D. Mcdonnell
A Model Of The Effects Of Authority On Consensus Formation In Adaptive Networks: Impact On Network Topology And Robustness, Brenton J. Prettejohn, Matthew J. Berryman, Mark D. Mcdonnell
Faculty of Engineering and Information Sciences - Papers: Part A
Opinions of individuals in real social networks are arguably strongly influenced by external determinants, such as the opinions of those perceived to have the highest levels of authority. In order to model this, we have extended an existing model of consensus formation in an adaptive network by the introduction of a parameter representing each agent's level of 'authority' based on their opinion relative to the overall opinion distribution. We found that introducing this model, along with a randomly varying opinion convergence factor, significantly impacts the final state of converged opinions and the number of interactions required to reach that state. …
Analytical Nonlinear Reluctance Model Of A Single-Phase Saturated Core Fault Current Limiter, Philip A. Commins, Jeffrey W. Moscrop
Analytical Nonlinear Reluctance Model Of A Single-Phase Saturated Core Fault Current Limiter, Philip A. Commins, Jeffrey W. Moscrop
Faculty of Engineering and Information Sciences - Papers: Part A
A saturated core fault current limiter (FCL) is a device that is designed to limit the fault currents in electrical energy networks and consequently, protect existing network equipment from damage. Due to complex nonlinear magnetic properties, the performance of saturated core FCLs has largely been characterized through experimentation and finite-element analysis simulations. Although both of these techniques are quite accurate, they are time consuming and do not describe the behavior of FCLs in actual electrical networks. This has led to an increasing demand for an accurate analytical model that is suitable for transient network analyses. This paper presents the development …
Secure Id-Based Linkable And Revocable-Iff-Linked Ring Signature With Constant-Size Construction, Man Ho Au, Joseph K. Liu, Willy Susilo, Tsz Hon Yuen
Secure Id-Based Linkable And Revocable-Iff-Linked Ring Signature With Constant-Size Construction, Man Ho Au, Joseph K. Liu, Willy Susilo, Tsz Hon Yuen
Faculty of Engineering and Information Sciences - Papers: Part A
In this paper, we propose a new ID-based event-oriented linkable ring signature scheme, with an option as revocable-iff-linked. With this option, if a user generates two linkable ring signatures in the same event, everyone can compute his identity from these two signatures. We are the first in the literature to propose such a secure construction in an ID-based setting. Even compared with other existing non ID-based schemes, we enjoy significant efficiency improvement, including constant signature size and linking complexity. Our scheme can be also regarded as a normal ID-based ring signature. We are also the first to propose such a …
Non-Collapsing In Fully Nonlinear Curvature Flows, Ben H. Andrews, Mat Langford, James A. Mccoy
Non-Collapsing In Fully Nonlinear Curvature Flows, Ben H. Andrews, Mat Langford, James A. Mccoy
Faculty of Engineering and Information Sciences - Papers: Part A
We consider embedded hypersurfaces evolving by fully nonlinear flows in which the normal speed of motion is a homogeneous degree one, concave or convex function of the principal curvatures, and prove a non-collapsing estimate: Precisely, the function which gives the curvature of the largest interior sphere touching the hy- persurface at each point is a subsolution of the linearized flow equation if the speed is concave. If the speed is convex then there is an analogous statement for exterior spheres. In particular, if the hypersurface moves with positive speed and the speed is concave in the principal curvatures, then the …
Optical Vortex Solitary Wave In Bounded Nematic-Liquid-Crystal Cell, Antonmaria A. Minzoni, Luke W. Sciberras, Noel F. Smyth, Annette L. Worthy
Optical Vortex Solitary Wave In Bounded Nematic-Liquid-Crystal Cell, Antonmaria A. Minzoni, Luke W. Sciberras, Noel F. Smyth, Annette L. Worthy
Faculty of Engineering and Information Sciences - Papers: Part A
Modulation theory, based on a Lagrangian formulation of the governing equations, is used to investigate the propagation of a nonlinear, nonlocal optical vortex solitary wave in a finite nematic-liquid-crystal cell. The nematic response to the vortex is calculated using the approach of themethod of images (MOI). It is demonstrated that the MOI is a reliable alternative to the usual Fourier series solution as it requires an order of magnitude fewer terms to obtain excellent agreement with numerical solutions. It is found that the cell walls, in addition to repelling the optical vortex solitary wave, as for an optical solitary wave, …
The Magnetocaloric Effect And Critical Behaviour Of The Mn0.94ti0.06coge Alloy, P Shamba, Jianli Wang, J C. Debnath, S J. Kennedy, Rong Zeng, M F Md Din, F Hong, Z X. Cheng, A J. Studer, S X. Dou
The Magnetocaloric Effect And Critical Behaviour Of The Mn0.94ti0.06coge Alloy, P Shamba, Jianli Wang, J C. Debnath, S J. Kennedy, Rong Zeng, M F Md Din, F Hong, Z X. Cheng, A J. Studer, S X. Dou
Faculty of Engineering and Information Sciences - Papers: Part A
Structural, magnetic and magnetocaloric properties of the Mn0.94Ti0.06CoGe alloy have been investigated using x-ray diffraction, DC magnetization and neutron diffraction measurements. Two phase transitions have been detected, at T-str = 235 K and T-C = 270 K. A giant magnetocaloric effect has been obtained at around Tstr associated with a structural phase transition from the low temperature orthorhombic TiNiSi-type structure to the high temperature hexagonal Ni2In-type structure, which is confirmed by neutron study. In the vicinity of the structural transition, at T-str, the magnetic entropy change, -Delta S-M reached a maximum value of 14.8 J kg(-1) K-1 under a magnetic …
Providing Metrics And Automatic Enhancement For Hierarchical Taxonomies, Ghassan Beydoun, Francisco Garcia-Sanchez, Cristin M. Vincent-Torres, Antonio A. Lopez-Lorca, Rodrigo Martinez-Bejar
Providing Metrics And Automatic Enhancement For Hierarchical Taxonomies, Ghassan Beydoun, Francisco Garcia-Sanchez, Cristin M. Vincent-Torres, Antonio A. Lopez-Lorca, Rodrigo Martinez-Bejar
Faculty of Engineering and Information Sciences - Papers: Part A
Taxonomies enable organising information in a human-machine understandable form, but constructing them for reuse and maintainability remains difficult. The paper presents a formal underpinning to provide quality metrics for a taxonomy under development. It proposes a methodology for semi-automatic building of maintainable taxonomies and outlines key features of the knowledge engineering context where the metrics and methodology are most suitable. The strength of the approach presented is that it is applied during the actual construction of the taxonomy. Users provide terms to describe different domain elements, as well as their attributes, and methodology uses metrics to assess the quality of …
Multi-Objective Reactive Power Support From Wind Farms For Network Performance Enhancement, Lasantha Meegahapola, Brendan Fox, Tim Littler, Damian Flynn
Multi-Objective Reactive Power Support From Wind Farms For Network Performance Enhancement, Lasantha Meegahapola, Brendan Fox, Tim Littler, Damian Flynn
Faculty of Engineering and Information Sciences - Papers: Part A
This paper examines the ability of the doubly fed induction generator (DFIG) to deliver multiple reactive power objectives during variable wind conditions. The reactive power requirement is decomposed based on various control objectives (e.g. power factor control, voltage control, loss minimisation, and flicker mitigation) defined around different time frames (i.e. seconds, minutes, and hourly), and the control reference is generated by aggregating the individual reactive power requirement for each control strategy. A novel coordinated controller is implemented for the rotor-side converter and the grid-side converter considering their capability curves and illustrating that it can effectively utilise the aggregated DFIG reactive …
Identity-Based Data Storage In Cloud Computing, Jinguang Han, Willy Susilo, Yi Mu
Identity-Based Data Storage In Cloud Computing, Jinguang Han, Willy Susilo, Yi Mu
Faculty of Engineering and Information Sciences - Papers: Part A
Identity-based proxy re-encryption schemes have been proposed to shift the burden of managing numerous files from the owner to a proxy server. Nevertheless, the existing solutions suffer from several drawbacks. First, the access permission is determined by the central authority, which makes the scheme impractical. Second, they are insecure against collusion attacks. Finally, only queries from the same domain (intra-domain) are considered. We note that one of the main applications of identity-based proxy re-encryption schemes is in the cloud computing scenario. Nevertheless, in this scenario, users in different domains can share files with each other. Therefore, the existing solutions do …
Enhancement Of The Refrigerant Capacity In Low Level Boron Doped La0.8gd0.2fe11.4si1.6, P Shamba, R Zeng, Jianli Wang, S J. Campbell, S X. Dou
Enhancement Of The Refrigerant Capacity In Low Level Boron Doped La0.8gd0.2fe11.4si1.6, P Shamba, R Zeng, Jianli Wang, S J. Campbell, S X. Dou
Faculty of Engineering and Information Sciences - Papers: Part A
The effects of boron doping on the itinerant-electron metamagnetic (IEM) transition and the magnetocaloric effects (MCEs) in the cubic NaZn13-type La0.8Gd0.2Fe11.4Si1.6 compound have been investigated. The Curie temperature, TC, of La0.8Gd0.2Fe11.4Si1.6Bx compounds with x=0, 0.03, 0.06, 0.2 and 0.3 was found to increase from 200 K to 222 K with increase in boron doping, x. The maximum values of the isothermal magnetic entropy change, ΔSM, (derived using the Maxwell relation for a field change ΔB=0-5 T) in La0.8Gd0.2Fe11.4Si1.6Bx with x=0, 0.03, 0.06, 0.2 and 0.3 are 14.8, 16, 15, 7.5 and 6.6 J kg−1 K−1 respectively, with corresponding values of …
Thermal Defect Analysis On Distribution Transformer Using A Rlc Network And Thermography, Geoffrey O. Asiegbu, Ahmed M. A Haidar, Kamarul Hawari
Thermal Defect Analysis On Distribution Transformer Using A Rlc Network And Thermography, Geoffrey O. Asiegbu, Ahmed M. A Haidar, Kamarul Hawari
Faculty of Engineering and Information Sciences - Papers: Part A
Electrical transformers are vital components found virtually in most power-operated equipments. These transformers spontaneously radiate heat in both operation and steady-state mode. Should this thermal radiation inherent in transformers rises above allowable threshold a reduction in efficiency of operation occurs. In addition, this could cause other components in the system to malfunction. The aim of this work is to detect the remote causes of this undesirable thermal rise in transformers such as oil distribution transformers and ways to control this prevailing thermal problem. Oil transformers consist of these components: windings usually made of copper or aluminum conductor, the core normally …
Rectifier Capacitor Filter Stress Analysis When Subject To Regular Voltage Fluctuations, Kun Zhao, Phil Ciufo, Sarath Perera
Rectifier Capacitor Filter Stress Analysis When Subject To Regular Voltage Fluctuations, Kun Zhao, Phil Ciufo, Sarath Perera
Faculty of Engineering and Information Sciences - Papers: Part A
Lamp flicker levels which arise as a result of voltage fluctuations can exceed limits set by appropriate standards. New lamp types such as compact fluorescent lights (CFLs) are less sensitive to voltage fluctuations as their flicker characteristics are considerably different compared to those of the traditional incandescent lamp. These differences could support the moderation of the present voltage fluctuation and flicker standards and hence the associated limits. The potential detrimental effects on electrical equipment which may be caused by relaxation of these limits should be investigated before any changes to the present standards take place. The impact of voltage fluctuations …
Automated Authorship Attribution Using Advanced Signal Classification Techniques, Maryam Ebrahimpour, Talis J. Putnins, Matthew J. Berryman, Andrew Allison, Brian W-H Ng, Derek Abbott
Automated Authorship Attribution Using Advanced Signal Classification Techniques, Maryam Ebrahimpour, Talis J. Putnins, Matthew J. Berryman, Andrew Allison, Brian W-H Ng, Derek Abbott
Faculty of Engineering and Information Sciences - Papers: Part A
In this paper, we develop two automated authorship attribution schemes, one based on Multiple Discriminant Analysis (MDA) and the other based on a Support Vector Machine (SVM). The classification features we exploit are based on word frequencies in the text. We adopt an approach of preprocessing each text by stripping it of all characters except a-z and space. This is in order to increase the portability of the software to different types of texts. We test the methodology on a corpus of undisputed English texts, and use leave-one-out cross validation to demonstrate classification accuracies in excess of 90%. We further …
Influence Of Formulated Chemical Cleaning Reagents On The Surface Properties And Separation Efficiency Of Nanofiltration Membranes, Alexander Simon, William E. Price, Long D. Nghiem
Influence Of Formulated Chemical Cleaning Reagents On The Surface Properties And Separation Efficiency Of Nanofiltration Membranes, Alexander Simon, William E. Price, Long D. Nghiem
Faculty of Engineering and Information Sciences - Papers: Part A
This study investigated the impact of two caustic and one acidic cleaning formulations (namely MC11, PC98, and MC3, respectively) on the properties and separation efficiency of three different nanofiltration (NF) membranes (namely NF270, NF90 and TFC-SR100). Overall, the impact of chemical cleaning on surface properties and rejection was membrane and cleaning reagent specific. It was driven mostly by conformational changes of the membrane polymeric active skin layer in response to an extreme caustic or acidic environment and to a certain extent by the adsorption of cleaning additives (e.g., surfactants and chelating reagents). The influence of chemical cleaning on the membrane …
Graphene Micro-Substrate Induced High Electron-Phonon Coupling In Mgb2, W X. Li, X Xu, K S. B De Silva, F X. Xiang, S X. Dou
Graphene Micro-Substrate Induced High Electron-Phonon Coupling In Mgb2, W X. Li, X Xu, K S. B De Silva, F X. Xiang, S X. Dou
Faculty of Engineering and Information Sciences - Papers: Part A
Electron-phonon coupling strength was studied in graphene-MgB2 composites to explore the possibilities for a higher superconducting transition temperature (Tc). For the first time in the experimental work on MgB2, the Raman active E2g mode was split into two parts: a softened mode corresponding to tensile strain and a hardened mode attributed to the carbon substitution effect. The tensile strain effect is suggested to improve Tc of graphene-MgB2 composites because it increases the electron-phonon coupling strength of MgB2.
Experimental Analysis Of The Magnetic Flux Characteristics Of Saturated Core Fault Current Limiters, Jeffrey W. Moscrop
Experimental Analysis Of The Magnetic Flux Characteristics Of Saturated Core Fault Current Limiters, Jeffrey W. Moscrop
Faculty of Engineering and Information Sciences - Papers: Part A
A fault current limiter (FCL) is a device that is designed to reduce the impact of fault currents on electricity networks and increase the availability of such networks to consumers. One particular FCL technology that is currently attracting worldwide attention, from both researchers and commercial engineering companies, is the saturated core FCL. This device utilizes the change in permeability between the saturated and unsaturated states of a magnetic core to provide both low steady state losses and effective fault current limiting. Typically the core is saturated using an electromagnetic coil, which can be either superconducting or non-superconducting. Although there have …
Mixed-Metal (Li, Al) Amidoborane: Synthesis And Enhanced Hydrogen Storage Properties, Guanglin Xia, Yingbin Tan, Xiaowei Chen, Zaiping Guo, Hua-Kun Liu, Xuebin Yu
Mixed-Metal (Li, Al) Amidoborane: Synthesis And Enhanced Hydrogen Storage Properties, Guanglin Xia, Yingbin Tan, Xiaowei Chen, Zaiping Guo, Hua-Kun Liu, Xuebin Yu
Faculty of Engineering and Information Sciences - Papers: Part A
Mixed-metal (Li, Al) amidoborane has been synthesized via mechanical ball milling of ammonia borane with lithium hexahydridoaluminate in different molar ratios. The reversible dehydrogenation properties of the thus-synthesized metallic amidoborane and its mixtures with ammonia borane in different ratios were systematically investigated in comparison with neat ammonia borane (AB). On the basis of thermogravimetric analysis and mass spectrometry results, the thus-synthesized mixed-metal amidoborane was shown to release around 10 wt% hydrogen below 200 degrees C, with an effective suppression of volatile side products. Furthermore, a synergistic effect between metallic amidoborane and ammonia borane has been identified, which leads to the …
Active Shear Planes Of Bolted Connections Failing In Block Shear, Drew D. Clements, Lip H. Teh
Active Shear Planes Of Bolted Connections Failing In Block Shear, Drew D. Clements, Lip H. Teh
Faculty of Engineering and Information Sciences - Papers: Part A
In the steel design codes worldwide, the shear area for calculating the block shear capacity of a bolted connection is either the gross or the net shear area. The authors have previously noted independent experimental evidence indicating the shear failure planes to lie midway between the gross and the net shear planes, termed the active shear planes. This paper presents the nonlinear contact finite brick element analysis results that confirm the location of the active shear planes, indicated by regions of maximum shear stresses. The finite-element analysis also found that shear stresses approach zero toward the free downstream end of …
Software Interfacing Of Servo Motor With Microcontroller, Ahmed M. Haidar, Chellali Benachaiba, Mohamad Zahir
Software Interfacing Of Servo Motor With Microcontroller, Ahmed M. Haidar, Chellali Benachaiba, Mohamad Zahir
Faculty of Engineering and Information Sciences - Papers: Part A
Automatic control of DC servo motor in terms of rotation angle has played a vital role in the advance Electromechanical Engineering. Nowadays, the automatic process of motor control using a Personal Computer (PC) is commonly used. The controllers are designed to interface between a Computer and Motor. This paper presents the implementation of PIC Microcontroller with Graphical User Interface (GUI) in Matlab to track the rotational angle of DC servo motor. The movement of slider on GUI will act as an input signal into the Microcontroller to change the rotation angle. A simulation on the performance of the system has …
Vibration Control Of Vehicle Seat Integrating With Chassis Suspension And Driver Body Model, Haiping Du, Weihua Li, Nong Zhang
Vibration Control Of Vehicle Seat Integrating With Chassis Suspension And Driver Body Model, Haiping Du, Weihua Li, Nong Zhang
Faculty of Engineering and Information Sciences - Papers: Part A
Vehicle seat suspension is one of very important components to provide ride comfort, in particular, commercial vehicles, to reduce driver fatigue due to long hours driving. This paper presents a study on active control of seat suspension to reduce vertical vibration transmitted from uneven road profile to driver body. The control problem will be firstly studied by proposing an integrated seat suspension model which includes vehicle chassis suspension, seat suspension, and driver body model. This is a new concept in the field of study because most of the current active and semi-active seat suspension studies only consider seat suspension or …
High-Throughput Particle Manipulation By Hydrodynamic, Electrokinetic, And Dielectrophoretic Effects In An Integrated Microfluidic Chip, Shunbo Li, Ming Li, Kristelle Bougot-Robin, Wenbin Cao, Irene Yeung Chau, Weihua Li, Weijia Wen
High-Throughput Particle Manipulation By Hydrodynamic, Electrokinetic, And Dielectrophoretic Effects In An Integrated Microfluidic Chip, Shunbo Li, Ming Li, Kristelle Bougot-Robin, Wenbin Cao, Irene Yeung Chau, Weihua Li, Weijia Wen
Faculty of Engineering and Information Sciences - Papers: Part A
Integrating different steps on a chip for cell manipulations and sample preparation is of foremost importance to fully take advantage of microfluidic possibilities, and therefore make tests faster, cheaper and more accurate. We demonstrated particle manipulation in an integrated microfluidic device by applying hydrodynamic, electroosmotic (EO), electrophoretic (EP), and dielectrophoretic (DEP) forces. The process involves generation of fluid flow by pressure difference, particle trapping by DEP force, and particle redirect by EO and EP forces. Both DC and AC signals were applied, taking advantages of DC EP, EO and AC DEP for on-chip particle manipulation. Since different types of particles …
Study Of Magnetorheology And Sensing Capabilities Of Mr Elastomers, Tongfei Tian, Weihua Li, Gursel Alici
Study Of Magnetorheology And Sensing Capabilities Of Mr Elastomers, Tongfei Tian, Weihua Li, Gursel Alici
Faculty of Engineering and Information Sciences - Papers: Part A
This study focuses on the magnetorheology and sensing capability of graphite based Magnetorheological Elastomers (Gr MREs). By introducing graphite (Gr) to conventional MREs, the Gr MREs are derived. The anisotropic sample with 20% graphite weight fraction was selected to be compared with anisotropic conventional MREs. The microstructures of anisotropic Gr MREs and conventional MREs were observed. Both steady state tests and dynamic tests were conducted to study rheological properties of the samples. For dynamic tests, the effects of strain amplitude, and frequency on both storage modulus and loss modulus were measured. For sensing capability, the resistance of selected Gr MREs …
Study Of Pdms Based Magnetorheological Elastomers, Tongfei Tian, Xing Zhong Zhang, Weihua Li, Gursel Alici, J Ding
Study Of Pdms Based Magnetorheological Elastomers, Tongfei Tian, Xing Zhong Zhang, Weihua Li, Gursel Alici, J Ding
Faculty of Engineering and Information Sciences - Papers: Part A
The fabrication of conventional magnetorheological elastomers (MRE) is usually taken more than 1 day because the conventional matrixes such as natural rubber and silicone rubber need long curing time to become solid state. This study presents a rapid method for fabricating MRE within 90 minutes by using poly(dimethylsiloxane) (PDMS) as the matrix thanks to the rapid curing of PDMS in high temperature. A total of four PDMS based MRE samples were fabricated. Their mechanical and rheological properties under both steady-state and dynamic loading conditions were tested with a parallel-plate rheometer. Additionally, the microstructures of the PDMS based MREs were also …