Social and Behavioral Sciences Commons^™

Leveraging Bert To Improve The Fears Index For Stock Forecasting, Linyi Yang, Yang Xu, Tin L. Ng, Ruihai Dong

Faculty of Engineering and Information Sciences - Papers: Part B

Financial and Economic Attitudes Revealed by Search (FEARS) index reflects the attention and sentiment of public investors and is an important factor for predicting stock price return. In this paper, we take into account the semantics of the FEARS search terms by leveraging the Bidirectional Encoder Representations from Transformers (BERT), and further apply a self-attention deep learning model to our refined FEARS seamlessly for stock return prediction. We demonstrate the practical benefits of our approach by comparing to baseline works.

Microstructure And Mechanical Properties Of Large-Volume Gradient-Structure Aluminium Sheets Fabricated By Cyclic Skin-Pass Rolling, 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

Materials of a gradient structure have been shown to possess both high strength and high ductility. To date, materials of a gradient structure can only be produced in small quantities. In this paper, we report a novel 'cyclic skin-pass rolling' (CSPR) technique capable of producing sheets of gradient structure in large quantities. Both experimental and analytical/numerical investigations are reported. In the experiments on aluminium sheets, the outer layer was subjected to 40 passes of CSPR with a reduction ratio of 1% per pass. After CSPR, the sample surface shows an ultrafine-grained microstructure with a mean grain size of 206 nm, …

Lubricant As A Sticking-Scale Inhibitor On High Temperature Sliding Contact, Hoang Bach Tran, Anh Kiet Tieu, Shanhong Wan, Hongtao Zhu

Faculty of Engineering and Information Sciences - Papers: Part B

Sticking oxide scale is one of the most serious concerns on moving steel surfaces at elevated temperature. However, there has been limited research dedicated to overcoming this issue. In the present work, pin-on-disc testing was carried out to reveal the effects of lubrication on wear characteristics of High Speed Steel sliding against Stainless Steel 316 at 700 °C. Apart from improved friction behavior, the use of inorganic lubricant significantly inhibits material transfer onto the HSS surface which otherwise suffers growing adhered scale during dry sliding contact. In addition, it was found that prolonged exposure to lubrication induces phase transformation of …

Channel Covariance Matrix Estimation Via Dimension Reduction For Hybrid Mimo Mmwave Communication Systems, Rui Hu, Jun Tong, Jiangtao Xi, Qinghua Guo, Yanguang Yu

Faculty of Engineering and Information Sciences - Papers: Part B

Hybrid massive MIMO structures with lower hardware complexity and power consumption have been considered as potential candidates for millimeter wave (mmWave) communications. Channel covariance information can be used for designing transmitter precoders, receiver combiners, channel estimators, etc. However, hybrid structures allow only a lower-dimensional signal to be observed, which adds difficulties for channel covariance matrix estimation. In this paper, we formulate the channel covariance estimation as a structured low-rank matrix sensing problem via Kronecker product expansion and use a low-complexity algorithm to solve this problem. Numerical results with uniform linear arrays (ULA) and uniform squared planar arrays (USPA) are provided …

Experimental Study On Flow Resistance Over Rigid Vegetated Channel, Xiao Liu, Liang Tang, Yu Han, Jian Chen, Shu-Qing Yang

Faculty of Engineering and Information Sciences - Papers: Part B

Vegetation is an important part of the ecological channel, and flow structure over vegetation in ecological channel is rather complex. The vegetation resistance to flow is affected by many factors, and there is still no general calculation method to express it. Thus, it is necessary to explore the mechanism of flow resistance over vegetation in open channel. In this paper, the rigid cylindrical sticks arranged in the open channel were used to simulate the stems of non-submerged vegetation in order to investigate the effects of vegetation on the flow. Through theoretical analysis and experimental verification, it shows the form drag …

Gwas Hints At Pleiotropic Roles For Flowering Locus T In Flowering Time And Yield-Related Traits In Canola, Harsh Raman, Rosy Raman, Yu Qiu, Avilash Yadav, Sridevi Sureshkumar, Lauren Borg, Maheswaran Rohan, David Wheeler, Oliver Owen, Ian Menz, Sureshkumar Balasubramanian

Faculty of Engineering and Information Sciences - Papers: Part B

Background: Transition to flowering at the right time is critical for local adaptation and to maximize grain yield in crops. Canola is an important oilseed crop with extensive variation in flowering time among varieties. However, our understanding of underlying genes and their role in canola productivity is limited.

Results: We report our analyses of a diverse GWAS panel (300-368 accessions) of canola and identify SNPs that are significantly associated with variation in flowering time and response to photoperiod across multiple locations. We show that several of these associations map in the vicinity of FLOWERING LOCUS T (FT) paralogs …

Toward High-Performance Hybrid Zn-Based Batteries Via Deeply Understanding Their Mechanism And Using Electrolyte Additive, Junnan Hao, Jun Long, Bo Li, Xiaolong Li, Shilin Zhang, Fuhua Yang, Xiaohui Zeng, Zhanhong Yang, Wei Kong Pang, Zaiping Guo

Faculty of Engineering and Information Sciences - Papers: Part B

Aqueous hybrid Zn-based batteries (ZIBs), as a highly promising alternative to lithium-ion batteries for grid application, have made considerable progress recently. However, few studies have been reported that investigate their working mechanism in detail. Here, the operando synchrotron X-ray diffraction is employed to thoroughly investigate the operational mechanism of a hybrid LiFePO₄(LFP)/Zn battery, which indicates only Li⁺ extraction/insertion from/into cathode during cycling. Based on this system, a cheap electrolyte additive, sodium dodecyl benzene sulfonate, is proposed to effectively enhance its electrochemical properties. The influence of the additive on the Zn anode and LFP cathode is comprehensively studied, …

Development And Evaluation Of A Comfort-Oriented Control Strategy For Thermal Management Of Mixed-Mode Ventilated Buildings, Massimo Fiorentini, Gianluca Serale, Georgios Kokogiannakis, Alfonso Capozzoli, Paul Cooper

Faculty of Engineering and Information Sciences - Papers: Part B

The paper presents the development, implementation and performance investigation via simulations and experiments of a comfort-oriented control strategy for natural ventilation and mechanical air conditioning management of a mixed-mode building. The proposed comfort-oriented control strategy determines whether it would be possible to operate in natural ventilation mode or in mechanical heating/cooling. The control algorithm calculates first the optimal opening percentage of the windows according to adaptive thermal comfort criteria. If natural ventilation cannot guarantee the thermal comfort requirements and mechanical conditioning is required, the algorithm dynamically optimises the heating or cooling set-point targeting a defined Predicted Mean Vote (PMV) index …

Solving Scheduling Problem In A Distributed Manufacturing System Using A Discrete Fruit Fly Optimization Algorithm, Xiaohui Zhang, Xinhua Liu, Shufeng Tang, Grzegorz Krolczyk, Zhixiong Li

Faculty of Engineering and Information Sciences - Papers: Part B

This study attempts to optimize the scheduling decision to save production cost (e.g., energy consumption) in a distributed manufacturing environment that comprises multiple distributed factories and where each factory has one flow shop with blocking constraints. A new scheduling optimization model is developed based on a discrete fruit fly optimization algorithm (DFOA). In this new evolutionary optimization method, three heuristic methods were proposed to initialize the DFOA model with good quality and diversity. In the smell‐based search phase of DFOA, four neighborhood structures according to factory reassignment and job sequencing adjustment were designed to help explore a larger solution space. …

Metamorphic Exploration Of An Unsupervised Clustering Program, Sen Yang, Dave Towey, Zhi Q. Zhou

Faculty of Engineering and Information Sciences - Papers: Part B

Machine learning has been becoming increasingly popular and widely-used in various industry domains. The presence of the oracle problem, however, makes it difficult to ensure the quality of this kind of software. Furthermore, the popularity of machine learning and its application has attracted many users who are not experts in this field. In this paper, we report on using a recently introduced method called metamorphic exploration where we proposed a set of hypothesized metamorphic relations for an unsupervised clustering program, Weka, to enhance understanding of the system and its better use.

The Impact Of A Dot: Case Studies Of A Noise Metamorphic Relation Pattern, Chaohua Wu, Liqun Sun, Zhi Q. Zhou

Faculty of Engineering and Information Sciences - Papers: Part B

We propose a 'noise' metamorphic relation pattern (MRP), which is a sub-pattern under the more general MRP 'symmetry.' We conduct case studies with real-life systems in three different application domains (obstacle perception in autonomous systems, machine translation, and named entity recognition) to show the usefulness of the 'noise' MRP for software verification and validation.

Radial Consolidation Analysis Using Delayed Consolidation Approach, Pankaj Baral, Cholachat Rujikiatkamjorn, Buddhima Indraratna, Serge Leroueil, Jian-Hua Yin

Faculty of Engineering and Information Sciences - Papers: Part B

No abstract provided.

Fiber Element Simulation Of Interaction Behavior Of Local And Global Buckling In Axially Loaded Rectangular Concrete-Filled Steel Tubular Slender Columns Under Fire Exposure, Ghanim Mohammed Kamil, Qing Quan Liang, Muhammad N. S Hadi

Faculty of Engineering and Information Sciences - Papers: Part B

Slender rectangular thin-walled concrete-filled steel tubular (CFST) columns in composite building structures exposed to fire may experience the interaction of local and global buckling. Numerical investigations on the interaction buckling responses of such columns under fire exposure have been rarely reported. This paper describes a fiber-based computational model for the prediction of the fire-resistance and interaction responses of local and global buckling of concentrically-loaded slender CFST columns made of rectangular sections exposed to fire. The thermal analysis is undertaken to calculate the distribution of temperatures in the column cross-section considering the effects of the air gap between concrete and steel, …

First Measurements With A Plastic Scintillation Dosimeter At The Australian Mri-Linac, Levi Madden, James Archer, Enbang Li, Urszula Jelen, Bin Dong, Natalia Roberts, Lois C. Holloway, Anatoly B. Rosenfeld

Faculty of Engineering and Information Sciences - Papers: Part B

MRI-LINACs combine MRI and LINAC technologies with the potential for image guided radiation therapy with optimal soft-tissue contrast. In this work, we present the advantages and limitations of plastic scintillation dosimeters (PSDs) for relative dosimetry with MRI-LINACs. PSDs possess many desirable qualities, including magnetic field insensitivity and irradiation angle independence, which are expected to make them suitable for dosimetry with MRI-LINACs. An in-house PSD was used to measure field size output factors as well as a percent depth dose distribution and the beam quality index TPR20/10 at a [Formula: see text] cm2 field size. Measurements were repeated with a Scanditronix/Wellhofer …

Eye State Recognition Method For Drivers With Glasses, Lei Geng, Haibing Yin, Zhitao Xiao, Jiangtao Xi

Faculty of Engineering and Information Sciences - Papers: Part B

Eye state recognition is a key step in fatigue detection method. However, factors such as occlusion of different types of glasses and changes in lighting conditions may have some impact on eye state recognition. In order to solve these problems, a driver's eye state recognition method based on deep learning is proposed. Firstly, the driver's face images are acquired using an infrared acquisition device. Secondly the multi-task cascaded convolution neural networks are used to detect the face bounding box and feature points of the driver's face image, and then the eye regions are extracted. Finally the Convolution Neural Network (CNN) …

Development Of A Variable Stiffness Magnetorheological Damper With Self-Powered Generation Capability, Xiaojing Zhu, Lei Deng, Shuaishuai Sun, Tianhong Yan, Jianqiang Yu, Zisu Ma, Weihua Li

Faculty of Engineering and Information Sciences - Papers: Part B

This article reports a compact stiffness controllable magnetorheological damper with a self-powered capacity. First, the structure, working mechanism, and analysis of the damper are presented. After the prototype of the magnetorheological damper, experimental tests were conducted to evaluate its variable stiffness feature and self-powered generation capability using a hydraulic Instron test system. The testing results demonstrate that its stiffness variation range can reach 70.4% when the applied current increases from 0 to 2 A. The energy generating capability of the magnetorheological damper was also evaluated using the Instron testing system under a harmonic excitation with 0.15 Hz frequency and 30 …

Effects Of Nano-Particle Lubrication On Micro Deep Drawing Of Mg-Li Alloy, Hamidreza Kamali, Haibo Xie, Fanghui Jia, Hui Wu, Hongyang Zhao, Hongmei Zhang, Na Li, Zhengyi Jiang

Faculty of Engineering and Information Sciences - Papers: Part B

Effects of various lubrication conditions on macroscale deep drawing have been investigated extensively while in microscale due to the open and closed lubrication pocket theory and friction coefficient escalation, proper lubricant concern becomes severe. Microforming is used to produce lighter and more energy-effective products accordingly; in this study, magnesium-lithium (Mg-Li) alloy is chosen to form a superior micro-cup due to its ultralight weight with outstanding ductility. Mg-Li is a new material in microscale; consequently, to study the mechanical properties, a heat treatment process is performed. The dry and oil lubrication conditions are chosen as benchmarks to investigate effects of TiO …

Equilibrium States On Higher-Rank Toeplitz Non-Commutative Solenoids, Zahra Afsar, Astrid An Huef, Iain F. Raeburn, Aidan Sims

Faculty of Engineering and Information Sciences - Papers: Part B

We consider a family of higher-dimensional non-commutative tori, which are twisted analogues of the algebras of continuous functions on ordinary tori and their Toeplitz extensions. Just as solenoids are inverse limits of tori, our Toeplitz non-commutative solenoids are direct limits of the Toeplitz extensions of non-commutative tori. We consider natural dynamics on these Toeplitz algebras, and we compute the equilibrium states for these dynamics. We find a large simplex of equilibrium states at each positive inverse temperature, parametrized by the probability measures on an (ordinary) solenoid.

Microencapsulation Of Paraffin With Poly (Urea Methacrylate) Shell For Solar Water Heater, Weiguang Su, Yilin Li, Tongyu Zhou, Jo Darkwa, Georgios Kokogiannakis, Zhao Li

Faculty of Engineering and Information Sciences - Papers: Part B

Previous research has demonstred that microencapsulated phase change materials (MEPCMs) could significantly increase the energy storage density of solar thermal energy storage (TES) systems. Compared with traditional phase change materials (PCMs), MEPCMs have many advantages since they can limit their exposure to the surrounding environment, enlarge the heat transfer area, and maintain the volume as the phase change occurs. In this study, a new MEPCM for solar TES systems is developed by encapsulation of paraffin wax with poly (urea formaldehyde) (PUF). The experimental results revealed that agglomeration of MEPCM particles occurred during the encapsulation process which affected the uniformity of …

Nonlinear Post-Fire Simulation Of Concentrically Loaded Rectangular Thin-Walled Concrete-Filled Steel Tubular Short Columns Accounting For Progressive Local Buckling, Ghanim Mohammed Kamil, Qing Quan Liang, Muhammad N. S Hadi

Faculty of Engineering and Information Sciences - Papers: Part B

The repair of fire-damaged thin-walled rectangular concrete-filled steel tubular (CFST) columns in engineering structures after fire exposure requires the assessment of their residual strength and stiffness. Existing numerical models have not accounted for the effects of local buckling on the post-fire behavior of CFST columns with rectangular thin-walled sections. This paper describes a nonlinear post-fire simulation technique underlying the theory of fiber analysis for determining the residual strengths and post-fire responses of concentrically loaded short thin-walled rectangular CFST columns accounting for progressive local buckling. The post-fire stress-strain laws for concrete in rectangular CFST columns are proposed based on available test …

Public Key Authenticated Encryption With Designated Equality Test And Its Applications In Diagnostic Related Groups, Yuanhao Wang, Qiong Huang, Hongbo Li, Jianye Huang, Guomin Yang, Willy Susilo

Faculty of Engineering and Information Sciences - Papers: Part B

Due to the massive growth of data and security concerns, data of patients would be encrypted and outsourced to the cloud server for feature matching in various medical scenarios, such as personal health record systems, actuarial judgements and diagnostic related groups. Public key encryption with equality test (PKEET) is a useful utility for encrypted feature matching. Authorized tester could perform data matching on encrypted data without decrypting. Unfortunately, due to the limited terminology in medicine, people within institutions may illegally use data, trying to obtain information through traversal methods. In this paper we propose a new PKEET notion, called public-key …

A Review Of Heat And Mass Transfer Improvement Techniques For Dehumidifiers And Regenerators Of Liquid Desiccant Cooling Systems, Haoshan Ren, Zhenjun Ma, Jingjing Liu, Xuemei Gong, Weihua Li

Faculty of Engineering and Information Sciences - Papers: Part B

Liquid desiccant cooling is being considered as an alternative to vapour compression air conditioning systems and has been extensively investigated in recent decades. The dehumidifiers and regenerators are the key components of liquid desiccant cooling systems and their heat and mass transfer performance significantly influences the performance of liquid desiccant cooling systems. This paper provides an overview of heat and mass transfer improvement techniques used to enhance the performance of direct-contact and indirect-contact dehumidifiers and regenerators used in liquid desiccant cooling systems. A number of techniques such as using a third heat transfer fluid, selection of packing materials, and tube …

Thermal Comfort In A Mixed-Mode Building: Are Occupants More Adaptive?, Jungsoo Kim, Federico Tartarini, Thomas Parkinson, Paul Cooper, Richard De Dear

Faculty of Engineering and Information Sciences - Papers: Part B

Mixed-mode (MM) ventilation approaches are becoming increasingly popular as a more energy efficient alternative to conventional HVAC solutions. By integrating both natural ventilation and mechanical cooling strategies, mixed-mode (or hybrid) building operation is able to achieve comfortable indoor environments whilst minimising reliance on energy intensive HVAC systems. This study investigated how different modes of operation in a mixed-mode building - air-conditioning (AC) and natural ventilation (NV) - affect indoor thermal environmental conditions and occupant perceptions of thermal comfort. Longitudinal field observations were made in a mixed-mode building located in subtropical climate area of Australia. Continuous indoor environmental quality (IEQ) data …

Pumped Hydro Using The Downstream River Channel For Time Shifting Storage, Saugato Mukerji, Peter Gibson

Faculty of Engineering and Information Sciences - Papers: Part B

The surge of Renewable Energy (RE) and particularly Solar PV in the journey to replace fossil fuels, is producing excess energy that is way more than the demand on sunny days. The visible network demand too is getting reduced by behind the meter installed residential PV. This is leading to energy prices approaching close to zero and even negative in sunny parts of the day.The lack of demand is leading to widespread curtailment of RE. This near free energy is creating opportunities for lower round trip efficiency storage options. Pumped hydro energy storage(PHES) operates between two reservoirs by pumping from …

Ventilative Cooling Potential Of Buildings In Australia, Federico Tartarini, Massimo Fiorentini, Laia Ledo Gomis, Paul Cooper

Faculty of Engineering and Information Sciences - Papers: Part B

The demand for space cooling is the fastest growing end-use of electricity in buildings since many rely on the use of air-conditioners only to control the indoor climate. Ventilative cooling is a passive cooling technique, which involves the use of outdoor air to lower buildings' indoor air temperature. In order to determine whether ventilative cooling may have the ability to reduce cooling loads, a detailed analysis of the local climate is needed. The aim of this study was to identify which Australian geographical regions have a suitable climate for the utilization of ventilative cooling techniques. The assessment of climatic potential …

Large Expert-Curated Database For Benchmarking Document Similarity Detection In Biomedical Literature Search, Peter Brown, Relish Consortium, Yaoqi Zhou

Faculty of Engineering and Information Sciences - Papers: Part B

Document recommendation systems for locating relevant literature have mostly relied on methods developed a decade ago. This is largely due to the lack of a large offline gold-standard benchmark of relevant documents that cover a variety of research fields such that newly developed literature search techniques can be compared, improved and translated into practice. To overcome this bottleneck, we have established the RElevant LIterature SearcH consortium consisting of more than 1500 scientists from 84 countries, who have collectively annotated the relevance of over 180 000 PubMed-listed articles with regard to their respective seed (input) article/s. The majority of annotations were …

Behavior Of Eccentrically Loaded Double Circular Steel Tubular Short Columns Filled With Concrete, Mizen Ahmed, Qing Quan Liang, Vipulkumar I. Patel, Muhammad N. S Hadi

Faculty of Engineering and Information Sciences - Papers: Part B

Circular concrete-filled double steel tubular (CFDST) columns in high-rise building structures possess high ductility and strength performance owing to the concrete confinement exerted by the external and internal circular steel tubes. However, the behavior of circular CFDST short columns that are loaded eccentrically has not been investigated either experimentally or numerically. Particularly, numerical studies on the moment-curvature responses, strength envelopes, confinement effects and moment distributions in circular CFDST beam-columns have not been reported. In this paper, experimental and computational investigations into the structural responses of circular CFDST short columns loaded eccentrically are presented. Nineteen short circular CFDST columns with various …

Potential Use Of Lignosulfonate For Expansive Soil Stabilisation, Dennis Pere Alazigha, J S. Vinod, Buddhima Indraratna, Ana Heitor

Faculty of Engineering and Information Sciences - Papers: Part B

This study involved the laboratory evaluation of the effectiveness of lignosulfonate (LS) admixture in improving engineering properties (i.e. swell potential, unconfined compressive strength, durability, compaction characteristics, permeability, consolidation characteristics and shrinkage behaviour) of a remoulded expansive soil. Standard geotechnical laboratory tests performed on untreated and LS-treated soil specimens compacted at optimum moisture content and maximum dry unit weight showed significant and consistent improvements in the engineering properties of the soil. The swell potential of the soil decreased by 23% while maintaining its ductility and pH value. The improved soil resistance to repeated freeze-thaw/wet-dry cycles was also observed in the LS-treated …

The Heterogeneity And Electro-Mechanical Characteristics Of Coal At The Micro-And Nanoscale, Weixiang Wang, Dazhao Song, Xueqiu He, Xianfeng Liu, Zhenlei Li, Xianghui Tian

Faculty of Engineering and Information Sciences - Papers: Part B

With regard to the mechanism of electromagnetic radiation (EMR) excited by deformation and failure of coal and rock, the present study employed the optical microscope, digital microhardness tester and atomic force microscopy (AFM) to measure surface morphology, surface microhardness and electro-mechanical characteristics, including elastic modulus and surface potential of coal. The results show that micro-mineral composition and micro-mechanical properties of coal are clearly heterogeneous. The elastic modulus values measured are 62.3 MPa-4.0 GPa and the surface potential values tested are 21.2-166.2 mV. The proportion distributions of the two parameters mentioned follow the normal distribution, which indicates the electro-mechanical characteristics of …

Numerical And Experimental Studies On Wrinkling Control Methods Of Sheet Metal Part With High Curvature And Large Flange In Rubber Forming, Lei Chen, Ying Bai, Zhengyi Jiang, Hui-Qin Chen, Can Wu, Qiaoyi Wang

Faculty of Engineering and Information Sciences - Papers: Part B

Wrinkling is one of the main failure modes in sheet metal forming process and may lead to assembly problems of the parts. Control of wrinkling is difficult due to the complex deformation behavior of the sheet metal. A finite element model for side blankholder method to control wrinkling was established and used for the simulation. Trials and simulations were conducted to analyze the parameters of wrinkling characteristics. Results show that with the increase in the angle of the side blankholder, the resistance force of the side blankholder decreases. The blank length on the side blankholder should be small enough. The …