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Articles 2071 - 2100 of 2936
Full-Text Articles in Social and Behavioral Sciences
Enhanced Biological Phosphorus Removal And Its Modeling For The Activated Sludge And Membrane Bioreactor Processes, M F. R Zuthi, W S. Guo, H H. Ngo, L D. Nghiem, F I. Hai
Enhanced Biological Phosphorus Removal And Its Modeling For The Activated Sludge And Membrane Bioreactor Processes, M F. R Zuthi, W S. Guo, H H. Ngo, L D. Nghiem, F I. Hai
Faculty of Engineering and Information Sciences - Papers: Part A
A modified activated sludge process (ASP) for enhanced biological phosphorus removal (EBPR) needs to sustain stable performance for wastewater treatment to avoid eutrophication in the aquatic environment. Unfortunately, the overall efficiency of the EBPR in ASPs and membrane bioreactors (MBRs) is frequently hindered by different operational/system constraints. Moreover, although phosphorus removal data from several wastewater treatment systems are available, a comprehensive mathematical model of the process is still lacking. This paper presents a critical review that highlights the core issues of the biological phosphorus removal in ASPs and MBRs while discussing the inhibitory process requirements for other nutrients' removal. This …
Description And Comparison Of Quality Of Electronic Versus Paper-Based Resident Admission Forms In Australian Aged Care Facilities, Ning Wang, Ping Yu, David Hailey
Description And Comparison Of Quality Of Electronic Versus Paper-Based Resident Admission Forms In Australian Aged Care Facilities, Ning Wang, Ping Yu, David Hailey
Faculty of Engineering and Information Sciences - Papers: Part A
Purpose To describe the paper-based and electronic formats of resident admission forms used in several aged care facilities in Australia and to compare the extent to which resident admission information was documented in paper-based and the electronic health records. Methods Retrospective auditing and comparison of the documentation quality of paper-based and electronic resident admission forms were conducted. A checklist of admission data was qualitatively derived from different formats of the admission forms collected. Three measures were used to assess the quality of documentation of the admission forms, including completeness rate, comprehensiveness rate and frequency of documented data element. The associations …
A High Performance Peer To Cloud And Peer Model Augmented With Hierarchical Secure Communications, Zhe Sun, Jun Shen
A High Performance Peer To Cloud And Peer Model Augmented With Hierarchical Secure Communications, Zhe Sun, Jun Shen
Faculty of Engineering and Information Sciences - Papers: Part A
This paper presents a secure storage model named Peer to Cloud and Peer (P2CP). P2CP uses the cloud storage system as a backbone storage system. However, when data transmission occurs, the data nodes, cloud user, and the non-cloud user are involved to complete the transaction all together. The users, typically the client peers, can communicate with each other directly, thus bypassing servers on the cloud. Similarly, cloud servers can communicate with each other in a P2P mode. We also introduce a "hierarchy security" method to guarantee the data security in the proposed P2CP storage model. A key feature of our …
Algorithm Portfolios For Logistics Optimization Considering Stochastic Demands And Mobility Allowance, N Shukla, A K. Choudhary, P Prakash, K J. Fernandes, M K. Tiwari
Algorithm Portfolios For Logistics Optimization Considering Stochastic Demands And Mobility Allowance, N Shukla, A K. Choudhary, P Prakash, K J. Fernandes, M K. Tiwari
Faculty of Engineering and Information Sciences - Papers: Part A
The vehicle routing problem with stochastic demand (VRPSD) is a well known NP-hard problem. The uncharacteristic behaviour associated with the problem enhances the computational efforts required to obtain a feasible and near-optimal solution. This paper proposes an algorithm portfolio methodology based on evolutionary algorithms, which takes into account the stochastic nature of customer demand to solve this computationally complex problem. These problems are well known to have computationally complex objective functions, which make their solutions hard to find, particularly when problem instances of large dimensions are considered. Of particular importance in such situations is the timeliness of the solution. For …
A Sax-Based Advanced Computational Tool For Assessment Of Clustered Rooftop Solar Pv Impacts On Lv And Mv Networks In Smart Grid, M J. E Alam, K M. Muttaqi, D Sutanto
A Sax-Based Advanced Computational Tool For Assessment Of Clustered Rooftop Solar Pv Impacts On Lv And Mv Networks In Smart Grid, M J. E Alam, K M. Muttaqi, D Sutanto
Faculty of Engineering and Information Sciences - Papers: Part A
Future distribution networks with increasing level of solar PV penetration will be managed using smart grid technologies capable of producing appropriate and timely response during normal and abnormal operational events. Distribution feeder loads vary throughout the day according to the trend of consumption of the customers. Solar PV outputs fluctuate in proportion to irradiance level of sun. Simultaneous occurrence of both of these variations would result in various operating conditions that may lead to unexpected events, and would require a large amount of network data to be processed and analyzed for decision making. It is envisaged that such data will …
A Mathematical Function To Represent S-Shaped Relationships For Geotechnical Applications, Martin D. Liu, K J. Xu, Suksun Horpibulsuk
A Mathematical Function To Represent S-Shaped Relationships For Geotechnical Applications, Martin D. Liu, K J. Xu, Suksun Horpibulsuk
Faculty of Engineering and Information Sciences - Papers: Part A
In this paper a new mathematical function is proposed for describing the S-shape relationship in both normal x and y scale and the semi-logarithmic x and y scale. Basic features of the proposed function have been demonstrated. The proposed function has then been used to simulate the S-shape relationship for seven categories of engineering phenomena. It is seen that the proposed mathematical function has a great potential for representing various S-shape relationships and provides a powerful tool for characterising properties of materials or response of systems; it is thus useful for further numerical analysis.
Understanding The Factors Controlling The Removal Of Trace Organic Contaminants By White-Rot Fungi And Their Lignin Modifying Enzymes: A Critical Review, Shufan Yang, Faisal I. Hai, Long D. Nghiem, William E. Price, Felicity Roddick, Maria T. Moreira, Saleh F. Magram
Understanding The Factors Controlling The Removal Of Trace Organic Contaminants By White-Rot Fungi And Their Lignin Modifying Enzymes: A Critical Review, Shufan Yang, Faisal I. Hai, Long D. Nghiem, William E. Price, Felicity Roddick, Maria T. Moreira, Saleh F. Magram
Faculty of Engineering and Information Sciences - Papers: Part A
White-rot fungi (WRF) and their lignin modifying enzymes (LME) can degrade a wide range of trace organic contaminants (TrOC), which are suspected to cause adverse health effects in humans and other biota. Recent studies have successfully applied either whole-cell WRF or their extracellular culture extract to remove TrOC from the aqueous phase. TrOC removal by a WRF system is dependent on a range of factors including molecular structure of the TrOC, fungal species and their specific LME, culture medium composition, and methods to enhance fungal degradation capacity; however, the specific relationships between these factors have not been systematically delineated. The …
Microstrength, Strength And Microstructure Of Carbonaceous Materials, Xing Xing, Guangqing Zhang, George Ciezki, Mark Dell'amico, Oleg Ostrovski
Microstrength, Strength And Microstructure Of Carbonaceous Materials, Xing Xing, Guangqing Zhang, George Ciezki, Mark Dell'amico, Oleg Ostrovski
Faculty of Engineering and Information Sciences - Papers: Part A
The effect of heat treatment at 700-1500 ºC on the mechanical strength, micro strength and pore structure of carbonaceous materials, including coke, char and coals, were studied using tensile test, ultra micro indentation and image analysis. Strength of chars and pyrolysed coals was strongly enhanced by heat treatment at temperature below 1100 °C; strength of cokes was slightly degraded after heat treatment at 1500 °C. Mechanical strength of carbonaceous materials was demonstrated to be significantly affected by micro strength and porosity. Micro strength of chars and coals was significantly enhanced by heat treatment, whereas micro strength of cokes was only …
Carbothermal Reduction Of Silica In Nitrogen And Nitrogen-Hydrogen Mixture, Xiaohan Wan, Guangqing Zhang, Oleg Ostrovski, Hal Aral
Carbothermal Reduction Of Silica In Nitrogen And Nitrogen-Hydrogen Mixture, Xiaohan Wan, Guangqing Zhang, Oleg Ostrovski, Hal Aral
Faculty of Engineering and Information Sciences - Papers: Part A
Carbothermal reduction of silica was investigated in a fixed bed reactor at 1300-1650 °C in nitrogen at 1-11 atm pressure and in hydrogen-nitrogen mixtures at atmospheric pressure. Samples were prepared from silica-graphite mixtures in the form of pellets. CO evolution in the reduction process was monitored using an infrared sensor; oxygen, nitrogen and carbon contents in reduced samples were determined by LECO analyses. Phases formed in the reduction process were analysed by XRD. Silica was reduced to silicon nitride and silicon carbide; their ratio was dependent on reduction time, temperature and nitrogen pressure. Reduction products also included SiO which was …
Analytical Solutions For Filtration Process Based On Constriction Size Concept, Vo Trong Nguyen, Cholachat Rujikiatkamjorn, Buddhima Indraratna
Analytical Solutions For Filtration Process Based On Constriction Size Concept, Vo Trong Nguyen, Cholachat Rujikiatkamjorn, Buddhima Indraratna
Faculty of Engineering and Information Sciences - Papers: Part A
An analytical model is proposed to describe the filtration process applicable to a base soil-filter system. The Navier-Stokes equations for porous media are used to capture the hydrodynamic behavior, whereas, numerically, a new algorithm is proposed to solve the Navier-Stokes equation in a nonlinear form. The various mixtures of base soil particles eroded and water flow within the system are computed using the workenergy principle incorporating the constriction size of the filter.The model can assess the filtration process through the flowrate and the accumulation and redistribution of fine particles within the filter. By discretizing the base soil and filter domains …
An Adaptive Bilateral Negotiation Model Based On Bayesian Learning, Chao Yu, Fenghui Ren, Minjie Zhang
An Adaptive Bilateral Negotiation Model Based On Bayesian Learning, Chao Yu, Fenghui Ren, Minjie Zhang
Faculty of Engineering and Information Sciences - Papers: Part A
Endowing the negotiation agent with a learning ability such that a more beneficial agreement might be obtained is increasingly gaining attention in agent negotiation research community. In this paper, we propose a novel bilateral negotiation model based on Bayesian learning to enable self-interested agents to adapt negotiation strategies dynamically during the negotiation process. Specifically, we assume that two agents negotiate over a single issue based on time-dependent tactic. The learning agent has a belief about the probability distribution of its opponent's negotiation parameters (i.e., the deadline and reservation offer). By observing opponent's historical offers and comparing them with the fitted …
Alternative Al Production Methods: Part 2 - Thermodynamic Analyses Of Indirect Carbothermal Routes, M A. Dewan, M A. Rhamdhani, G A. Brooks, B J. Monaghan, L Prentice
Alternative Al Production Methods: Part 2 - Thermodynamic Analyses Of Indirect Carbothermal Routes, M A. Dewan, M A. Rhamdhani, G A. Brooks, B J. Monaghan, L Prentice
Faculty of Engineering and Information Sciences - Papers: Part A
It has been widely claimed that direct and indirect carbothermic reduction of alumina for the production of aluminium have the potential to consume less energy, generate fewer perfluorocarbons and have lower total greenhouse gas emissions compared to the Hall-He´ roult process. A review of alternative aluminium production techniques focusing on the indirect carbothermal reduction routes has been presented in the Part 1 paper. In this Part 2 paper, systematic thermodynamic analyses of indirect carbothermal reduction routes are presented. These include the analyses of the Stage 1 of the process where alumina is converted to intermediate aluminium compounds before they are …
Rejection Of Small And Uncharged Chemicals Of Emerging Concern By Reverse Osmosis Membranes: The Role Of Free Volume Space Within The Active Skin Layer, Takahiro Fujioka, Nagayasu Oshima, Ryoichi Suzuki, Stuart J. Khan, Annalie Roux, Yvan Poussade, Jörg E. Drewes, Long D. Nghiem
Rejection Of Small And Uncharged Chemicals Of Emerging Concern By Reverse Osmosis Membranes: The Role Of Free Volume Space Within The Active Skin Layer, Takahiro Fujioka, Nagayasu Oshima, Ryoichi Suzuki, Stuart J. Khan, Annalie Roux, Yvan Poussade, Jörg E. Drewes, Long D. Nghiem
Faculty of Engineering and Information Sciences - Papers: Part A
Free-volume hole-radii of the active skin layer of one seawater and two low pressure reverse osmosis (RO) membranes - namely SWC5, ESPAB, and ESPA2 respectively - were evaluated using positron annihilation lifetime spectroscopy (PALS) with a slow positron beam. The results were related to the rejection of boric acid and eight N-nitrosamines to provide insights to the transport of these small solutes through RO membranes. At pH 8 (which is the experimental pH in this study), these solutes are uncharged. PALS analysis showed that the SWC5 has the smallest mean free-volume hole-radius (0.259 nm) among the three RO membranes investigated …
The Future Prospects Of Embedded Microchips In Humans As Unique Identifiers: The Risks Versus The Rewards, Katina Michael, M G. Michael
The Future Prospects Of Embedded Microchips In Humans As Unique Identifiers: The Risks Versus The Rewards, Katina Michael, M G. Michael
Faculty of Engineering and Information Sciences - Papers: Part A
Microchip implants for humans are not new. Placing heart pacemakers in humans for prosthesis is now considered a straightforward procedure. In more recent times we have begun to use brain pacemakers for therapeutic purposes to combat illnesses such as epilepsy, Parkinson's disease, and severe depression. Microchips are even being placed inside prosthetic knees and hips during restorative procedures to help in the gathering of post-operative analytics that can aid rehabilitation further. While medical innovations that utilize microchips abound, over the last decade we have begun to see the potential use of microchip implants for non-medical devices in humans, namely for …
Effect Of Annealing On Properties Of Carbonaceous Materials. Part Ii: Porosity And Pore Geometry, Xing Xing, Guangqing Zhang, Mark Dell'amico, George Ciezki, Qingbo Meng, Oleg Ostrovski
Effect Of Annealing On Properties Of Carbonaceous Materials. Part Ii: Porosity And Pore Geometry, Xing Xing, Guangqing Zhang, Mark Dell'amico, George Ciezki, Qingbo Meng, Oleg Ostrovski
Faculty of Engineering and Information Sciences - Papers: Part A
The pore structure of carbonaceous materials was studied using image analysis. The effect of annealing on the porosity and pore geometry of cokes, chars, and pyrolyzed coals (laboratory chars) was examined in the temperature range of 973 K to 1773 K (700 C to 1500 C). The porosity of chars and pyrolyzed coals significantly increased during annealing at temperatures below 1373 K (1100 C) due to volatile matter release. Further increasing of the annealing temperature from 1373 K to 1773 K (1100 C to 1500 C) caused marginal porosity evolution. The porosity of cokes was not affected by annealing at …
The Fate Of Pharmaceuticals, Steroid Hormones, Phytoestrogens, Uv-Filters And Pesticides During Mbr Treatment, Kaushalya C. Wijekoon, Faisal I. Hai, Jinguo Kang, William E. Price, Wenshan Guo, Hao H. Ngo, Long D. Nghiem
The Fate Of Pharmaceuticals, Steroid Hormones, Phytoestrogens, Uv-Filters And Pesticides During Mbr Treatment, Kaushalya C. Wijekoon, Faisal I. Hai, Jinguo Kang, William E. Price, Wenshan Guo, Hao H. Ngo, Long D. Nghiem
Faculty of Engineering and Information Sciences - Papers: Part A
This study examined the relationship between molecular properties and the fate of trace organic contaminants (TrOCs) in the aqueous and solid phases during wastewater treatment by MBR. A set of 29 TrOCs was selected to represent pharmaceuticals, steroid hormones, phytoestrogens, UV-filters and pesticides that occur ubiquitously in municipal wastewater. Both adsorption and biodegradation/transformation were found responsible for the removal of TrOCs by MBR treatment. A connection between biodegradation and molecular structure could be observed while adsorption was the dominant removal mechanism for the hydrophobic (logD > 3.2) compounds. Highly hydrophobic (logD > 3.2) but readily biodegradable compounds did not accumulate in sludge. …
Kms States On The C*-Algebras Of Finite Graphs, Astrid An Huef, Marcelo Laca, Iain F. Raeburn, Aidan D. Sims
Kms States On The C*-Algebras Of Finite Graphs, Astrid An Huef, Marcelo Laca, Iain F. Raeburn, Aidan D. Sims
Faculty of Engineering and Information Sciences - Papers: Part A
We consider a finite directed graph E, and the gauge action on its Toeplitz-Cuntz-Krieger algebra, viewed as an action of R. For inverse temperatures larger than a critical value βc, we give an explicit construction of all the KMSβ states. If the graph is strongly connected, then there is a unique KMSβc state, and this state factors through the quotient map onto C*(E). Our approach is direct and relatively elementary.
The Effect Of Cooling Rates On The Microstructure And Mechanical Properties Of Thermo-Mechanically Processed Ti-Al-Mo-V-Cr-Fe Alloys, Mansur Ahmed, Dmytro G. Savvakin, Orest M. Ivasishin, Elena V. Pereloma
The Effect Of Cooling Rates On The Microstructure And Mechanical Properties Of Thermo-Mechanically Processed Ti-Al-Mo-V-Cr-Fe Alloys, Mansur Ahmed, Dmytro G. Savvakin, Orest M. Ivasishin, Elena V. Pereloma
Faculty of Engineering and Information Sciences - Papers: Part A
Two near-β titanium alloys, Ti–5Al–5Mo–5V–1Cr–1Fe and a modified one containing 2 wt% Cr (Ti–5Al–5Mo–5V–2Cr–1Fe) were produced from Ti hydride precursor powders via the cost-effective blended elemental powder metallurgy technique. The effects of two cooling rates (10 K s−1 and 1 K s−1) during thermo-mechanical processing on the microstructure and mechanical properties were investigated using X-ray diffraction and scanning electron microscopy. X-ray line profile analysis revealed that dislocation densities and microstrain in β-Ti phase are higher than in α-Ti phase for all cases. In both alloys, slower cooling results in an increase in α volume fraction and promotes morphology of continuous …
Analysis Of Elemental Segregation In A Microalloyed Cast Steel, Jingwei Zhao, Zhengyi Jiang, Dongbin Wei
Analysis Of Elemental Segregation In A Microalloyed Cast Steel, Jingwei Zhao, Zhengyi Jiang, Dongbin Wei
Faculty of Engineering and Information Sciences - Papers: Part A
Quantitative investigation is made on the elemental segregation in different zones of a heavy microalloyed cast steel by energy dispersive X-ray spectroscopy. It is demonstrated that C shows serious segregation tendency than that of Mn and Si, and the degree of C segregation in the surface zone is higher than that in the central zone. C enrichment is generally observed at both dendrite arm and grain boundaries, and more C segregation at dendrite arm boundary in contrast to that at grain boundary is found in this steel. The distribution of C concentration shows a decreased trend from root to tip …
Behaviour Of New Zealand Ironsand During Iron Ore Sintering, Zhe Wang, Harold Rogers, David Pinson, Brian J. Monaghan, Sheng Chew, Paul Zulli, Sharon Nightingale, Guangqing Zhang
Behaviour Of New Zealand Ironsand During Iron Ore Sintering, Zhe Wang, Harold Rogers, David Pinson, Brian J. Monaghan, Sheng Chew, Paul Zulli, Sharon Nightingale, Guangqing Zhang
Faculty of Engineering and Information Sciences - Papers: Part A
Titanium-bearing burdens are commonly introduced into blast furnaces to protect the hearlh because the so-called "titanium bear" which is a precipitate of carbide, nitride and carbonitride of titanium may form in the blast furnace hearth if Ti02 is present in the feed [1 , 2J. New Zealand ironsand is a titanomagnetite, containing around 60 wt.% iron, 8 wt.% titanium and other substances such as silica, phosphorus and lime [3, 4]. Since it is competitive in price, introduction of the ironsand into the ferrous feed can reduce the production cost and potentially increase blast furnace campaign life. An appropriate method of …
Behavior Of Hybrid Frp-Concrete-Steel Double-Skin Tubular Columns With A Square Outer Tube And A Circular Innert Tube Subjected To Axial Compression, Tao Yu, J G. Teng
Behavior Of Hybrid Frp-Concrete-Steel Double-Skin Tubular Columns With A Square Outer Tube And A Circular Innert Tube Subjected To Axial Compression, Tao Yu, J G. Teng
Faculty of Engineering and Information Sciences - Papers: Part A
Hybrid fiber-reinforced polymer (FRP) concrete steel, double skin tubular columns (DSTCs) are a new form of hybrid columns. The most common sectional form of hybrid DSTCs consists of a layer of concrete sandwiched between a circular inner steel tube and a circular outer FRP tube whose fiber directions are close to the hoop detection to provide effective confinement to the concrete. Much recent research has been conducted on circular hybrid DSTCs, which has demonstrated that the combination of the three constituent materials leads to several advantages not available with existing forms of columns. In practical applications, for aesthetic and other …
Degradation Of Azo Dye Acid Orange 7 In A Membrane Bioreactor By Pellets And Attached Growth Of Coriolus Versicolour, Faisal I. Hai, Kazuo Yamamoto, Fumiyuki Nakajima, Kensuke Fukushi, Long D. Nghiem, William E. Price, Bo Jin
Degradation Of Azo Dye Acid Orange 7 In A Membrane Bioreactor By Pellets And Attached Growth Of Coriolus Versicolour, Faisal I. Hai, Kazuo Yamamoto, Fumiyuki Nakajima, Kensuke Fukushi, Long D. Nghiem, William E. Price, Bo Jin
Faculty of Engineering and Information Sciences - Papers: Part A
The aim of this study was to systematically compare the degradation of azo dye acid orange 7 by spongy pellets and attached biofilm of Coriolus versicolour (NBRC 9791) in a membrane bioreactor (MBR) under non-sterile conditions. Mild stirring (35 rpm) resulted in spherical (φ = 0.5 cm), spongy pellets and concomitantly triggered high enzymatic activity of the fungus, allowing for excellent decolouration (>99%) of a synthetic wastewater containing the dye. However, bacterial contamination eventually damaged the fungus pellets, leading to decreased decolouration efficiency. Promotion of attached growth on a plastic support along with formation of spherical spongy pellets allowed …
Unconventional Block Shear Failures Of Bolted Connections In Cold-Reduced Steel Sheets, Lip H. Teh, Veysel Yazici
Unconventional Block Shear Failures Of Bolted Connections In Cold-Reduced Steel Sheets, Lip H. Teh, Veysel Yazici
Faculty of Engineering and Information Sciences - Papers: Part A
This paper examines the block shear design equation proposed by the first author based on laboratory tests of bolted connection specimens failing in the conventional block shear failure mode. It shows that the explanation regarding the feasible mechanism of block shear failures previously provided by the first author does not necessarily apply to staggered bolted connections, in which the downstream bolts do not have the same edge distance. For staggered bolted connections, a block shear failure may occur through the shear rupture and tensile yielding mechanism for particular configurations, as demonstrated for the first time in this paper. The present …
A Composite Quality-Guided Phase Unwrapping Algorithm For Fast 3d Profile Measurement, Ke Chen, Jiangtao Xi, Yanguang Yu, Limei Song
A Composite Quality-Guided Phase Unwrapping Algorithm For Fast 3d Profile Measurement, Ke Chen, Jiangtao Xi, Yanguang Yu, Limei Song
Faculty of Engineering and Information Sciences - Papers: Part A
Fringe pattern profilometry (FPP) is one of the most promising 3D profile measurement techniques, which has been widely applied in many areas. A challenge problem associated with FPP is the unwrapping of wrapped phase maps resulted from complex object surface shapes. Although existing quality-guided phase unwrapping algorithms are able to solve such a problem, they are usually extensively computational expensive and not able to be applied to fast 3D measurement scenarios. This paper proposes a new quality-guided phase unwrapping algorithm with higher computational efficiency than the conventional ones. In the proposed method, a threshold of quality value is used to …
Pu-Based Solutions For Slope Stabilizing Piles, Wei Dong Guo
Pu-Based Solutions For Slope Stabilizing Piles, Wei Dong Guo
Faculty of Engineering and Information Sciences - Papers: Part A
This paper proposes an equivalent load transfer approach for simulating the response of passive piles owing to soil movement. The approach is elaborated for two commonly seen (normal and deep) sliding modes. In terms of compatibility conditions across sliding and stable layers, new coupled elastic (sliding layer)-elastic (stable layer) (E-E) solutions, and plastic (sliding layer)-elastic-plastic (stable layer) (P-EP) solutions are developed. The solutions are implemented into a program called GASMove operating in the mathematical software Mathcad. They are compared with available numerical analyses, and employed to the predict response of eight instrumented piles. The study reveals the proposed equivalent load-soil …
Encoding Navigable Speech Sources: A Psychoacoustic-Based Analysis-By-Synthesis Approach, Xiguang Zheng, Christian Ritz, Jiangtao Xi
Encoding Navigable Speech Sources: A Psychoacoustic-Based Analysis-By-Synthesis Approach, Xiguang Zheng, Christian Ritz, Jiangtao Xi
Faculty of Engineering and Information Sciences - Papers: Part A
This paper presents a psychoacoustic-based analysis-by-synthesis approach for compressing navigable speech sources. The approach targets multi-party teleconferencing applications, where selective reproduction of individual speech sources is desired. Based on exploiting sparsity of speech in the perceptual time-frequency domain, multiple speech signals are encoded into one mono mixture signal, which can be further compressed using a standard speech codec. Using side information indicating the active speech source for each time frequency instant enables flexible decoding and reproduction. Objective results highlight the importance of considering perception when exploiting the sparse nature of speech in the time-frequency domain. Results show that this sparsity, …
Two-Stage Fuzzy Fusion With Applications To Through-The-Wall Radar Imaging, Cher Hau Seng, Abdesselam Bouzerdoum, Moeness G. Amin, Son Lam Phung
Two-Stage Fuzzy Fusion With Applications To Through-The-Wall Radar Imaging, Cher Hau Seng, Abdesselam Bouzerdoum, Moeness G. Amin, Son Lam Phung
Faculty of Engineering and Information Sciences - Papers: Part A
A two-stage fuzzy image fusion approach, which combines multiple radar images of the same scene, is proposed to produce a more informative image. In this approach, two different image fusion methods are first applied. Then, a fuzzy logic fusion method is applied to the outputs of the first fusion stage. The performance of the proposed approach is evaluated on through-the-wall radar images obtained using different polarizations. Experimental results show that the proposed approach enhances image quality by producing outputs with high target intensity values and low clutter. © 2012 IEEE.
Modelling Of Size Effects In Microforming Process With Consideration Of Grained Heterogeneity, H N. Lu, D B. Wei, Z Y. Jiang, X H. Liu, K Manabe
Modelling Of Size Effects In Microforming Process With Consideration Of Grained Heterogeneity, H N. Lu, D B. Wei, Z Y. Jiang, X H. Liu, K Manabe
Faculty of Engineering and Information Sciences - Papers: Part A
Size effect is a special phenomenon in metal micro-forming process. As the deformation process is scale down to micro/mesoscale, the characteristics of single grain involved in the deformed region play a significant role on the material mechanical behaviours resulting in the invalidation of classical theories in microforming. This paper presents a newly developed material model in microscale on the basis of the grained heterogeneity (e.g. grain size, shape and deformability) and specimen dimension. Voronoi tessellation has been employed to describe the polycrystalline aggregate. The grain shape is controlled by the centroidal-voronoi algorithm to drive grains into steady state. Hardness of …
Enhanced Boron Rejection By Nf/Ro Membranes By Complexation With Polyols: Measurement And Mechanisms, Kha L. Tu, Allan R. Chivas, Long D. Nghiem
Enhanced Boron Rejection By Nf/Ro Membranes By Complexation With Polyols: Measurement And Mechanisms, Kha L. Tu, Allan R. Chivas, Long D. Nghiem
Faculty of Engineering and Information Sciences - Papers: Part A
Boron rejection by nanofiltration (NF) and reverse osmosis (RO) membranes in the presence of glycerol, mannitol and sorbitol was investigated as a function of feed solution pH and boron:polyol molar ratio. In the presence of polyols, significant boron rejection improvement was obtained and the extent of the impact was directly related to the stability constant of the boron-polyol complex. Polyols could complex with boron in either the boric acid or borate anion forms; however the complexation between polyol and boric acid appeared to be incomplete. With and without the presence of polyols, boron rejection was strongly pH dependent. The increase …
Prediction Of Long-Term Urban Stormwater Loads At Single Sites, Daniel May, Muttucumaru Sivakumar
Prediction Of Long-Term Urban Stormwater Loads At Single Sites, Daniel May, Muttucumaru Sivakumar
Faculty of Engineering and Information Sciences - Papers: Part A
Long-term total phosphorus loads from 17 urban catchments in the USA were predicted using five different measures of central tendency defining site mean concentration (arithmetic mean, geometric mean, median, harmonic mean and flow-weighted mean). Overall, the flow-weighted mean concentration produced the most accurate predictions of long-term loads. The geometric mean produced the second most accurate predictions. Along with the median and harmonic mean, the geometric mean predicted long-term load relatively well at most catchments exhibiting negative correlations between event mean concentration and total event runoff depth. However, they significantly underestimated long-term load at catchments exhibiting a positive correlation between these …