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Articles 2611 - 2640 of 14367

Full-Text Articles in Social and Behavioral Sciences

Motion Optimization And Parameter Identification For A Human And Lower Back Exoskeleton Model, Paul Manns, Manish Sreenivasa, Matthew Millard, Katja Mombaur Jan 2017

Motion Optimization And Parameter Identification For A Human And Lower Back Exoskeleton Model, Paul Manns, Manish Sreenivasa, Matthew Millard, Katja Mombaur

Faculty of Engineering and Information Sciences - Papers: Part B

Designing an exoskeleton to reduce the risk of low-back injury during lifting is challenging. Computational models of the human-robot system coupled with predictive movement simulations can help to simplify this design process. Here, we present a study that models the interaction between a human model actuated by muscles and a lower back exoskeleton. We provide a computational framework for identifying the spring parameters of the exoskeleton using an optimal control approach and forward-dynamics simulations. This is applied to generate dynamically consistent bending and lifting movements in the sagittal plane. Our computations are able to predict motions and forces of the …

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Optimizing Wearable Assistive Devices With Neuromuscular Models And Optimal Control, Manish Sreenivasa, Matthew Millard, Paul Manns, Katja Mombaur Jan 2017

Optimizing Wearable Assistive Devices With Neuromuscular Models And Optimal Control, Manish Sreenivasa, Matthew Millard, Paul Manns, Katja Mombaur

Faculty of Engineering and Information Sciences - Papers: Part B

The coupling of human movement dynamics with the function and design of wearable assistive devices is vital to better understand the interaction between the two. Advanced neuromuscular models and optimal control formulations provide the possibility to study and improve this interaction. In addition, optimal control can also be used to generate predictive simulations that generate novel movements for the human model under varying optimization criterion.

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Finite Element Modelling Of Biodegradable Jute Drains, Thanh Trung Nguyen, Buddhima Indraratna, Cholachat Rujikiatkamjorn, John Philip Carter Jan 2017

Finite Element Modelling Of Biodegradable Jute Drains, Thanh Trung Nguyen, Buddhima Indraratna, Cholachat Rujikiatkamjorn, John Philip Carter

Faculty of Engineering and Information Sciences - Papers: Part B

Prefabricated vertical drains made from natural materials such as jute and coir are fast emerging as a practical alternative to synthetic drains because they have excellent engineering properties and they are biodegradable and environment friendly. While previous studies indicate that the biodegradation of drains can sometimes be exacerbated when they are exposed to adverse environmental conditions, thus making the dissipation of excess pore pressure considerably retarded, those which use numerical modelling to incorporate the implications on soil consolidation are limited. This study therefore aims to carry out a numerical investigation based on the Finite Element Method (FEM) to evaluate how …

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Obfuscating Re-Encryption Algorithm With Flexible And Controllable Multihop On Untrusted Outsourcing Server, Mingwu Zhang, Yan Jiang, Yi Mu, Willy Susilo Jan 2017

Obfuscating Re-Encryption Algorithm With Flexible And Controllable Multihop On Untrusted Outsourcing Server, Mingwu Zhang, Yan Jiang, Yi Mu, Willy Susilo

Faculty of Engineering and Information Sciences - Papers: Part B

An outsourcing re-encryption program can help a ciphertext owner (delegator) transform his/her ciphertext into another ciphertext of delegatee. For example, an e-mail receiver can re-transfer an encrypted e-mail to his secretary while allowing the e-mail to be readable for her. For a multi-hop re-encryption, the delegatee can re-encrypt the ciphertext to another user in delegation chain, repeatedly. Traditionally, this transformation is usually conducted by a proxy or an outsourcing server. However, the proxy or outsourcing server needs a re-encryption key (i.e., re-key) and the re-encryption program must execute in a black-box manner (cannot trace into or debug and monitor the …

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Multi-Objective Search-Based Approach To Estimate Issue Resolution Time, Wisam Al-Zubaidi, Hoa K. Dam, Aditya K. Ghose, Xiaodong Li Jan 2017

Multi-Objective Search-Based Approach To Estimate Issue Resolution Time, Wisam Al-Zubaidi, Hoa K. Dam, Aditya K. Ghose, Xiaodong Li

Faculty of Engineering and Information Sciences - Papers: Part B

Background: Resolving issues is central to modern agile software development where a software is developed and evolved incrementally through series of issue resolutions. An issue could represent a requirement for a new functionality, a report of a software bug or a description of a project task. Aims: Knowing how long an issue will be resolved is thus important to different stakeholders including end-users, bug reporters, bug triagers, developers and managers. This paper aims to propose a multi-objective search-based approach to estimate the time required for resolving an issue. Methods: Using genetic programming (a meta-heuristic optimization method), we iteratively generate candidate …

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Statistical Shape Model Generation Using Diffeomorphic Surface Registration, Jiaqi Wu, Guangxu Li, Huimin Lu, Hyoung Kim, Philip O. Ogunbona Jan 2017

Statistical Shape Model Generation Using Diffeomorphic Surface Registration, Jiaqi Wu, Guangxu Li, Huimin Lu, Hyoung Kim, Philip O. Ogunbona

Faculty of Engineering and Information Sciences - Papers: Part B

Statistical shape modelling is an efficient and robust method for medical image segmentation in computer-aided diagnosis. The key step in building a statistical shape model is to find corresponding landmarks in each instance of a training set. In this paper, a novel landmark correspondence estimation method that uses edge collapse surface simplification and the sphere registration is proposed. All the landmarks are selected and transformed by spherical conformal mapping from the instances of the training set and the associated correspondence are automatically found on the spheres. We applied our method on 21 cases of 3-D right lung shapes. The results …

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The Influence Of Consolidation Force On The Performance Of Afp Manufactured Laminates, Ebrahim Oromiehie, Gangadhara B. Prusty, Paul P. Compston, Ginu Rajan Jan 2017

The Influence Of Consolidation Force On The Performance Of Afp Manufactured Laminates, Ebrahim Oromiehie, Gangadhara B. Prusty, Paul P. Compston, Ginu Rajan

Faculty of Engineering and Information Sciences - Papers: Part B

With the increasing use of carbon/glass fibre reinforced polymer composites for large components like wing skins, fuselages and fuel tanks in aircrafts and next generation of spacecraft, utilization of advanced automated manufacturing is critical for mass production. In-situ consolidation in automated fibre placement (AFP) technology through merging several manufacturing stages like cutting, curing and consolidation has opened up a wider range of applications as well as new markets for composite materials in several sectors including aerospace and automobile in large scale. Nevertheless, the quality and integrity of AFP manufactured composites is heavily dependent on large number of variables and parameters …

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Enhanced Materials Performance Of Al/Ti/Al Laminate Sheets Subjected To Cryogenic Roll Bonding, Hai Liang Yu, Cheng Lu, Anh Kiet Tieu, Hui Jun Li, Ajit R. Godbole, Xiong Liu, Charlie Kong Jan 2017

Enhanced Materials Performance Of Al/Ti/Al Laminate Sheets Subjected To Cryogenic Roll Bonding, Hai Liang Yu, Cheng Lu, Anh Kiet Tieu, Hui Jun Li, Ajit R. Godbole, Xiong Liu, Charlie Kong

Faculty of Engineering and Information Sciences - Papers: Part B

Laminate sheets attract increasing attention from researchers and engineers. In this paper, Al/Ti/Al laminate sheets were fabricated by using cryogenic roll bonding for first time. The edge defects, mechanical properties, and interface bonding of laminate sheets by cryogenic roll bonding technique were compared with these by room-temperature roll bonding technique. Results show that there are some edge cracks in laminate sheets by room-temperature roll bonding while they do not appear when subjected to cryogenic roll bonding. The ultimate tensile stress of laminate sheets by cryogenic roll bonding increases up to 36.7% compared to that by room-temperature roll bonding. When laminate …

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Choosing Parameters For The Subfield Lattice Attack Against Overstretched Ntru, Dung Hoang Duong, Masaya Yasuda, Tsuyoshi Takagi Jan 2017

Choosing Parameters For The Subfield Lattice Attack Against Overstretched Ntru, Dung Hoang Duong, Masaya Yasuda, Tsuyoshi Takagi

Faculty of Engineering and Information Sciences - Papers: Part B

Albrecht et al. [1] at Crypto 2016 and Cheon et al. [4] at ANTS 2016 independently presented a subfield attack on overstretched NTRU problem. Their idea is to map the public key down to the subfield (by norm and trace map respectively) and hence obtain a lattice of smaller dimension for which a lattice reduction algorithm is efficiently applicable. At Eurocrypt 2017, Kirchner and Fouque proposed another variant attack which exploits the presence of orthogonal bases within the cyclotomic number rings and instead of using the matrix of the public key in the subfield, they use the multiplication matrix by …

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Split Questionnaire Designs: Collecting Only The Data That You Need Through Mcar And Mar Designs, James O. Chipperfield, Margo L. Barr, David G. Steel Jan 2017

Split Questionnaire Designs: Collecting Only The Data That You Need Through Mcar And Mar Designs, James O. Chipperfield, Margo L. Barr, David G. Steel

Faculty of Engineering and Information Sciences - Papers: Part B

We call a sample design that allows for different patterns, or sets, of data items to be collected from different sample units a Split Questionnaire Design (SQD). SQDs can be thought of as incorporating missing data into survey design. This paper examines the situation where data that are not collected by an SQD can be treated as Missing Completely At Random or Missing At Random, targets are regression coefficients in a generalised linear model fitted to binary variables, and targets are estimated using Maximum Likelihood. A key finding is that it can be easy to measure the relative contribution of …

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Physical, Hydraulic, And Mechanical Properties Of Clayey Soil Stabilized By Lightweight Alkali-Activated Slag Geopolymer, Yan Jun Du, Bo Wei Yu, Kai Liu, Ning Jun Jiang, Martin D. Liu Jan 2017

Physical, Hydraulic, And Mechanical Properties Of Clayey Soil Stabilized By Lightweight Alkali-Activated Slag Geopolymer, Yan Jun Du, Bo Wei Yu, Kai Liu, Ning Jun Jiang, Martin D. Liu

Faculty of Engineering and Information Sciences - Papers: Part B

Lightweight cement materials are extensively used in the infrastructure construction. Geopolymer is a low-carbon and environmentally friendly cementitious material. This paper presents an investigation on the physical, hydraulic, and mechanical characteristics of lightweight geopolymer stabilized soil (LGSS) and a comparison with lightweight cement stabilized soil (LCSS). Measurements of volumetric absorption (VA) of water, hydraulic conductivity (k), and unconfined compressive strength (qu), scanning electron microscope (SEM) observation, mercury intrusion porosimetry (MIP) test, and thermogravimetric analysis (TGA) are conducted. The results show that LGSS has higher VA than LCSS. The k of LGSS is one order of magnitude higher than that of …

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The Role Of Microbial Diversity And Composition In Minimizing Sludge Production In The Oxic-Settling-Anoxic Process, Galilee U. Semblante, Hop V. Phan, Faisal I. Hai, Zhi-Qiang Xu, William E. Price, Long D. Nghiem Jan 2017

The Role Of Microbial Diversity And Composition In Minimizing Sludge Production In The Oxic-Settling-Anoxic Process, Galilee U. Semblante, Hop V. Phan, Faisal I. Hai, Zhi-Qiang Xu, William E. Price, Long D. Nghiem

Faculty of Engineering and Information Sciences - Papers: Part B

The oxic-settling-anoxic (OSA) process, which involves an aerobic tank attached to oxygen- and substratedeficient external anoxic reactors, minimizes sludge production in biological wastewater treatment. In this study, the microbial community structure of OSA was determined. Principal coordinate analysis showed that among the three operational factors, i.e., (i) redox condition, (ii) external reactor sludge retention time (SRText), and (iii) sludge interchange between aerobic and anoxic reactors, redox condition had the greatest impact onmicrobial diversity.Generally, reactorswith lower oxidation-reduction potential had highermicrobial diversity. The main aerobic sequencing batch reactor of OSA (SBROSA) that interchanged sludgewith an external anoxic reactor had greater microbial diversity …

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An Experimental Study Of Axial Load Transfer Mechanisms Of Cable Bolts Using Axially Split Embedment Apparatus, Ali Mirza, Naj Aziz Jan 2017

An Experimental Study Of Axial Load Transfer Mechanisms Of Cable Bolts Using Axially Split Embedment Apparatus, Ali Mirza, Naj Aziz

Faculty of Engineering and Information Sciences - Papers: Part B

The load transfer mechanisms of cable bolts differ from those for normal rebar bolts. The cable bolts used in mines are basically steel strands with different constructions depending on the number of wires or elements and the way they are laid. Tendon bolts (rebar and cable) are normally evaluated for their strength and load transfer properties. The tendon strength can be evaluated by the tensile failure tests, while the load transfer strength is evaluated by the pull and shear strength tests. Short Encapsulation Pull Testing (SEPT) is normally used to study the load transfer capacities of tendons, and it can …

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Energy Efficiency Of Uplink Massive Mimo Systems With Successive Interference Cancellation, Tianle Liu, Jun Tong, Qinghua Guo, Jiangtao Xi, Yanguang Yu, Zhitao Xiao Jan 2017

Energy Efficiency Of Uplink Massive Mimo Systems With Successive Interference Cancellation, Tianle Liu, Jun Tong, Qinghua Guo, Jiangtao Xi, Yanguang Yu, Zhitao Xiao

Faculty of Engineering and Information Sciences - Papers: Part B

The energy efficiency (EE) of an uplink massive multiple-input multiple-output system depends strongly on the number of antennas at base stations (BSs) and the receiver architecture. The existing research has focused on linear receivers, such as those based on zero forcing (ZF) or linear minimum mean squared error detectors. In this letter, we investigate the EE when nonlinear successive-interference cancellation (SIC) receivers are employed at the BSs and provide an asymptotic analysis of the total transmit power with ZF-SIC. We show that to achieve the same spectrum efficiency, the SIC receivers require fewer antennas at BSs, but only moderate increase …

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Site Characterisation For The Ballina Field Testing Facility, Richard B. Kelly, Jubert Pineda, L. Bates, L Suwal, A Fitzallen Jan 2017

Site Characterisation For The Ballina Field Testing Facility, Richard B. Kelly, Jubert Pineda, L. Bates, L Suwal, A Fitzallen

Faculty of Engineering and Information Sciences - Papers: Part B

A soft soil field testing facility has been recently established near Ballina, New SouthWales, on the east coast of Australia, which is aimed at improving design and construction methods for transport infrastructure. Several sampling, laboratory and in situ testing campaigns have been performed to characterise the material properties of the soil. High-quality laboratory testing has been performed at one location through the soil profile and a range of geophysics, cone penetrometer, seismic dilatometer, shear vane and permeability tests have been carried out at other locations. The in situ tests have demonstrated that the stratigraphy and test data are reasonably uniform …

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Limit Analysis Of Ground Anchor Forces, Shiguo Xiao, Wei Dong Guo Jan 2017

Limit Analysis Of Ground Anchor Forces, Shiguo Xiao, Wei Dong Guo

Faculty of Engineering and Information Sciences - Papers: Part B

An anchored sheet wall is commonly used in retaining deep excavations. Anchor force is one of the critical design parameters in practice. Based on the kinematical admissible failure mechanism, a limit analysis approach to determine the anchor force is presented. The explicit formula for the anchor force is given, which makes it easy to calculate using a simple calculation program such as MS Office Excel. Anchor force is mainly influenced by seven parameters: the internal friction angle; cohesion of the soil; wall friction angle; surcharge on the ground surface; dip angle of the anchor; penetration depth of the wall; and …

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Influence Of Geogrid On The Drying Shrinkage Performance Of Concrete Pavements, Abbas Sahib Abd-Ali Al-Hedad, Ebony Bambridge, Muhammad N. S Hadi Jan 2017

Influence Of Geogrid On The Drying Shrinkage Performance Of Concrete Pavements, Abbas Sahib Abd-Ali Al-Hedad, Ebony Bambridge, Muhammad N. S Hadi

Faculty of Engineering and Information Sciences - Papers: Part B

The aim of this study is to investigate the effect of geogrid on the drying shrinkage behaviour of concrete pavements. For this purpose, two categories of concrete specimens were prepared and tested by drying them within the controlled environmental conditions, for 56 days. The first category of specimens included casting and testing nine concrete prism specimens having dimensions of 75 x 75 x 280 mm. These specimens were divided into three groups. The first group included three unreinforced concrete prism specimens and taken as references. The second group consisted of three concrete prism specimens reinforced with a single biaxial geogrid …

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Study Of Micro Flexible Rolling Based On Grained Inhomogeneity, Feijun Qu, Zhengyi Jiang, Dongbin Wei, Qingqiang Chen, Haina Lu Jan 2017

Study Of Micro Flexible Rolling Based On Grained Inhomogeneity, Feijun Qu, Zhengyi Jiang, Dongbin Wei, Qingqiang Chen, Haina Lu

Faculty of Engineering and Information Sciences - Papers: Part B

This paper shows an analytical, numerical and experimental investigation to comprehend the role of grained inhomogeneity which plays in micro flexible rolling in terms of the average rolling force and the thickness directional springback of the workpiece after it exits the roll bite zone. Miniature tensile tests and micro hardness tests are accomplished to identify the scattered stress-strain curves for 500 ¿m thick aluminium alloy 1060 samples with grain size of approximately 23-71 µm and to determine the weighted heterogeneity coefficient for each sample separately, according to which the theoretical calculations and numerical simulations based upon 3D Voronoi tessellation technique …

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Enhancement Of Thermal Stability And Cycling Performance Of Lithium-Ion Battery At High Temperature By Nano-Ppy/Ommt-Coated Separator, Shuo Yang, Huiya Qin, Xuan Li, Hui Jun Li, Pei Yao Jan 2017

Enhancement Of Thermal Stability And Cycling Performance Of Lithium-Ion Battery At High Temperature By Nano-Ppy/Ommt-Coated Separator, Shuo Yang, Huiya Qin, Xuan Li, Hui Jun Li, Pei Yao

Faculty of Engineering and Information Sciences - Papers: Part B

Nanopolypyrrole/organic montmorillonite- (nano-ppy/OMMT-) coated separator is prepared by coating nano-ppy/OMMT on the surface of polyethylene (PE). Nano-ppy/OMMT-coated separator with three-dimensional and multilayered network structure is beneficial to absorb more organic electrolyte, enhancing the ionic conductivity (reach 4.31 mS . cm-1). Meanwhile, the composite separator exhibits excellent thermal stability and mechanical properties. The strong covalent bonds (Si-F) are formed by the nucleophilic substitution reaction between F− from the thermal decomposition and hydrolysis of LiPF6 and the covalent bonds (Si-O) of nano-ppy/OMMT. The Si-F can effectively prevent the formation of HF, POF3, and LiF, resulting in the …

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Compressive Behavior Of Hybrid Double-Skin Tubular Columns With A Large Rupture Strain Frp Tube, Tao Yu, Shi Shun Zhang, Le Huang, Chun Wa Chan Jan 2017

Compressive Behavior Of Hybrid Double-Skin Tubular Columns With A Large Rupture Strain Frp Tube, Tao Yu, Shi Shun Zhang, Le Huang, Chun Wa Chan

Faculty of Engineering and Information Sciences - Papers: Part B

A hybrid fiber-reinforced polymer (FRP)-concrete-steel double-skin tubular column (DSTC) consists of an outer FRP tube and an inner steel tube, with the space in between filled with concrete. This paper presents results from the first ever experimental study on hybrid DSTCs with a large rupture strain (LRS) FRP tube, namely, polyethylene terephthalate (PET) FRP tube. The experimental program involved the testing of 12 hybrid DSTC specimens with or without additional concrete inside the inner steel tube. The test results confirmed the ample ductility of hybrid DSTCs with a PET-FRP tube despite the severe local buckling of the inner steel tube …

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Shear Strength Model Of Reinforced-Concrete Exterior Joint Under Cyclic Loading, Tung M. Tran, Muhammad N. S Hadi Jan 2017

Shear Strength Model Of Reinforced-Concrete Exterior Joint Under Cyclic Loading, Tung M. Tran, Muhammad N. S Hadi

Faculty of Engineering and Information Sciences - Papers: Part B

A capacity model for shear strength of reinforced-concrete exterior beam-column joints subjected to quasi-static cyclic loading is established. In this model, only a fraction of this force is asserted to be transferred into the joint core, the remainder is assumed to be transferred into the adjacent column. A biaxial failure criterion of concrete is adopted to predict shear failure of the joint core caused by a combination of principal compression and tension stresses. The contribution of the shear reinforcement is accounted for by improving the tensile strength of the concrete. In addition, the special features of the proposed model include: …

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Controllable Dc-Link Fault Current Limiter Augmentation With Dc Chopper To Improve Fault Ride-Through Of Dfig, Amin Jalilian, Seyed Behzad Naderi, Michael Negnevitsky, Mehrdad Tarafdar Hagh, Kashem M. Muttaqi Jan 2017

Controllable Dc-Link Fault Current Limiter Augmentation With Dc Chopper To Improve Fault Ride-Through Of Dfig, Amin Jalilian, Seyed Behzad Naderi, Michael Negnevitsky, Mehrdad Tarafdar Hagh, Kashem M. Muttaqi

Faculty of Engineering and Information Sciences - Papers: Part B

Doubly fed induction generator (DFIG) based wind turbines are sensitive to grid faults due to utilising small-scale rotor side converter (RSC). The application of crowbar protection to improve the fault ride-through (FRT) capability of the DFIG converts it to a squirrel cage induction generator, which makes it difficult to comply with grid codes. This study proposes an innovative DC-link controllable fault current limiter (C-FCL) based FRT scheme for the RSC to improve the FRT capability of the DFIG. The proposed scheme replaces the AC crowbar protection and eliminates its disadvantages. The C-FCL does not affect the normal operation of the …

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Methods For Harmonic Analysis And Reporting In Future Grid Applications, Sean T. Elphick, Victor J. Gosbell, Victor W. Smith, Sarath Perera, Phil Ciufo, Gerrard M. Drury Jan 2017

Methods For Harmonic Analysis And Reporting In Future Grid Applications, Sean T. Elphick, Victor J. Gosbell, Victor W. Smith, Sarath Perera, Phil Ciufo, Gerrard M. Drury

Faculty of Engineering and Information Sciences - Papers: Part B

The rollout of advanced metering infrastructure, advanced distribution automation schemes, and integration of generation into distribution networks, along with a raising of awareness of power quality (PQ), means that there is an increase in the availability of power system monitoring data. In particular, the data for harmonics, whether it is voltage or current harmonics, is now available from a large number of sites and from a diverse range of PQ instruments. The traditional analysis and reporting of power quality examines harmonic orders to the 50th. This means that the harmonic data available for analysis are significantly larger than, for example, …

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Large Scale Proactive Power-Quality Monitoring: An Example From Australia, Sean T. Elphick, Phil Ciufo, Gerrard M. Drury, Victor W. Smith, Sarath Perera, Victor J. Gosbell Jan 2017

Large Scale Proactive Power-Quality Monitoring: An Example From Australia, Sean T. Elphick, Phil Ciufo, Gerrard M. Drury, Victor W. Smith, Sarath Perera, Victor J. Gosbell

Faculty of Engineering and Information Sciences - Papers: Part B

In Australia and many other countries, distribution network service providers (DNSPs) have an obligation to their customers to provide electrical power that is reliable and of high quality. Failure to do so may have significant implications ranging from financial penalties theoretically through to the loss of a license to distribute electricity. In order to ensure the reliability and quality of supply are met, DNSPs engage in monitoring and reporting practice. This paper provides an overview of a large long-running power-quality monitoring project that has involved most of Australia's DNSPs at one time or another. This paper describes the challenges associated …

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Terahertz Spectroscopy: The New Tool To Help Detect Art Fraud, R A. Lewis Jan 2017

Terahertz Spectroscopy: The New Tool To Help Detect Art Fraud, R A. Lewis

Faculty of Engineering and Information Sciences - Papers: Part B

When we look at a painting, how do we know it's a genuine piece of art? Everything we see with the unaided eye in a painting - from the Australian outback images of Albert Namatjira or Russell Drysdale, to the vibrant works of Pro Hart - is thanks to the mix of colours that form part of the visible spectrum. But if we look at the painting in a different way, at a part of the spectrum that is invisible to our eyes, then we can see something very different. As our recently published research shows, it could even help …

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Ultra Wideband Channel Coefficient Measurements For Detecting Methane Gas In A Multipath Environment, Ahmed Moftah Ownalla Alshabo, David Stirling, Montserrat Ros, Peter James Vial, Beata J. Wysocki, Tadeusz A. Wysocki, Nicholas Dal Sasso Jan 2017

Ultra Wideband Channel Coefficient Measurements For Detecting Methane Gas In A Multipath Environment, Ahmed Moftah Ownalla Alshabo, David Stirling, Montserrat Ros, Peter James Vial, Beata J. Wysocki, Tadeusz A. Wysocki, Nicholas Dal Sasso

Faculty of Engineering and Information Sciences - Papers: Part B

In this paper, an investigation was carried out into the effect of a non-explosive methane gas mixture on various Ultra Wide Band Channel Coefficients. Using simplified apparatus consisting of a rubberized tube (6 mm diameter) connected for significant periods to either a (pressurized) source of mixed Methane and Nitrogen or alternatively to a Nitrogen only source. The tube containing either gas feed was wrapped using two complete turns around a 160mm diameter PVC pipe. Several flows of the mixed gas, containing 2.57% methane, were introduced and flowed through the pipe before being sealed in the tube. Removal of any Methane …

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New And Practical Mathematical Model Of Membrane Fouling In An Aerobic Submerged Membrane Bioreactor, M F. R Zuthi, Wenshan Guo, Huu H. Ngo, Long D. Nghiem, Faisal I. Hai, Siqing Xia, Jianxin Li, Jixiang Li, Yi Liu Jan 2017

New And Practical Mathematical Model Of Membrane Fouling In An Aerobic Submerged Membrane Bioreactor, M F. R Zuthi, Wenshan Guo, Huu H. Ngo, Long D. Nghiem, Faisal I. Hai, Siqing Xia, Jianxin Li, Jixiang Li, Yi Liu

Faculty of Engineering and Information Sciences - Papers: Part B

This study aimed to develop a practical semi-empirical mathematical model of membrane fouling that accounts for cake formation on the membrane and its pore blocking as the major processes of membrane fouling. In the developed model, the concentration of mixed liquor suspended solid is used as a lumped parameter to describe the formation of cake layer including the biofilm. The new model considers the combined effect of aeration and backwash on the foulants¿ detachment from the membrane. New exponential coefficients are also included in the model to describe the exponential increase of transmembrane pressure that typically occurs after the initial …

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Opml: A One-Pass Closed-Form Solution For Online Metric Learning, Wenbin Li, Yang Gao, Lei Wang, Luping Zhou, Jing Huo, Yinghuan Shi Jan 2017

Opml: A One-Pass Closed-Form Solution For Online Metric Learning, Wenbin Li, Yang Gao, Lei Wang, Luping Zhou, Jing Huo, Yinghuan Shi

Faculty of Engineering and Information Sciences - Papers: Part B

To achieve a low computational cost when performing online metric learning for large-scale data, we present a one-pass closed-form solution namely OPML in this paper. Typically, the proposed OPML first adopts a one-pass triplet construction strategy, which aims to use only a very small number of triplets to approximate the representation ability of whole original triplets obtained by batch-manner methods. Then, OPML employs a closed-form solution to update the metric for new coming samples, which leads to a low space (i.e., O(d)) and time (i.e., O(d 2)) complexity, where d is the feature dimensionality. In addition, an extension of OPML …

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Ethics And Brain Implants In The Military [Commentary], Marcus R. Wigan Jan 2017

Ethics And Brain Implants In The Military [Commentary], Marcus R. Wigan

Faculty of Engineering and Information Sciences - Papers: Part B

Definitions are a key factor when discussing the ethics of brain implants in the military. There is a world of difference between a permanent embedded rewritable chip and an active RFID-managed interface to a nervous system.

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Proeva: Runtime Proactive Performance Evaluation Based On Continuous-Time Mardov Chains, Guoxin Su, Taolue Chen, Yuan Feng, David Rosenblum Jan 2017

Proeva: Runtime Proactive Performance Evaluation Based On Continuous-Time Mardov Chains, Guoxin Su, Taolue Chen, Yuan Feng, David Rosenblum

Faculty of Engineering and Information Sciences - Papers: Part B

Software systems, especially service-based software systems, need to guarantee runtime performance. If their performance is degraded, some reconfiguration countermeasures should be taken. However, there is usually some latency before the countermeasures take effect.

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