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Title: Environmental gas sensing, aspect of physics, moving toward early, fast response and accurate detection

Dr. Jianxiong Zhu, Southeast University, China

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Dr. Jianxiong Zhu is an Associate Professor from Southeast University, China. He received d Ph.D. from the University of Missouri Columbia in 2015. After that, he worked as assistant professor in Beijing institute of Nanoenergy and Nanaosysem. He also worked as postdoc in KAIST, Korea, and National University of Singapore for several years. His research interests are focused on MEMS zero-power sensor, optics, nanostructure and dynamics, wearable flexible sensor, and gas sensor.

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Abstract. With the development of 5g technology, artificial intelligence, the Internet of things, and virtual reality technology, traditional environmental sensor technology is facing more and more severe challenges and opportunities. Originated from MEMS capacitive energy collection, aiming at the micro nano gas/environment sensing mechanism and process preparation, a series of gas sensors such as mid-infrared, ion-induced, laser-induced, flexible wearable, etc. are creatively developed. The selectivity, high sensitivity, environmental compatibility, and batch process of gas detection are discussed and solved from different footholds. Through artificial intelligence to solve the big health data fusion of environmental sensors, in-depth discussion of micro-nano gas sensing technology in wireless temperature and humidity (IoT), machine learning (AI) application level to solve the practical application of big health. Furthermore, machine learning has visualized the relationship of different gases in the mixture, which demonstrated the feasibility of gas identification for various applications.
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Keynote Speakers

The information of Keynote Speakers is being revised and updated periodically
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Topic: Using Inerter-based Damper for Offshore Semi-submersible Platform Vibration Control 

Dr. Kaiming Bi, Associate Professor, School of Civil and Mechanical Engineering, Curtin University, Australia

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Dr. Kaiming Bi received his Bachelor degree in Civil Engineering in 2003 and Master degree in Bridge Engineering in 2006 from Central South University (CSU), China. He received his PhD of Structural Engineering from the University of Western Australia (UWA) in 2011. He joined the School of Civil and Resource Engineering at UWA as a Lecturer after working as a Graduate Research Assistant in UWA for one year. Dr Bi moved to Curtin University in March 2014 and currently serves as an Associate Professor and ARC Future Fellow in the Centre for Infrastructure Monitoring and Protection (CIMP) in the School of Civil and Mechanical Engineering. His research mainly focused on the Structural Dynamics and Structural Vibration Control. He generated 98 peer reviewed papers in the well-known international journals and more than 60 peer-reviewed conference papers. Dr Bi has won quite a few highly competitive research grants from Australian Research Council (ARC) and other funding sources, including the prestigious Future Fellowship and Discovery Early Career Award (DECRA).
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Abstract. Offshore platforms are located in the harsh environment.  Environmental loadings such as wind and sea wave may result in excessive vibrations to these offshore structures. Inerter-based element can generate an apparent mass that is much larger than its physical mass, it also can generate a negative stiffness to the system. It therefore has the potential to be applied to mitigate the adverse vibrations of offshore SSPs. This presentation introduces some recent developments in this area. In particular, analytical studies that utilise the mass amplification effect and negative stiffness effect of the device will be introduced first, the experimental studies on a newly developed inerter damper and large-scale water flume tests on a SSP will also be introduced.

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Topic: Emerging Heat pump systems for agricultural applications

Dr. Muhammad Sultan, Assistant Professor, Bahauddin Zakariya University, Pakistan

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Muhammad Sultan completed his Ph.D. (2015) and Postdoc (2017) at Kyushu University (Japan) in the field of Energy & Environmental Engineering. He was awardee of MEXT and JASSO fellowships (from Japanese Government) during Ph.D. and Postdoc studies, respectively.

Currently, he is working as Assistant Professor at the Department of Agricultural Engineering, Bahauddin Zakariya University (Pakistan).

He has published 80+ journal articles, 85+ conference articles, 13 book chapters and several magazine articles.

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Abstract.  For any nation, primary sources of energy consumption are involved in: heating, cooling, humidification, dehumidification, ventilation and/or air-conditioning (HVAC), which may be required for various applications. Currently, Pakistan is facing extreme energy shortage, therefore, low-cost and energy-efficient HVAC systems are principally required. As the Pakistan is an agriculture dependent country, therefore, low-cost HVAC systems are required not only for humans thermal comfort but also for various agriculture based applications e.g. greenhouse air-conditioning, agricultural products (fruits and vegetables) storage, and animals (livestock) air-conditioning etc. In this regard, various innovative cooling and air-conditioning technologies have been introduced worldwide. Consequently, in this keynote speech, evaporative cooling and adsorption cooling based HVAC technologies are explored. These technologies are environmentally safe and can be simply operated by water or low-grade waste heat. The low-grade waste heat can be supplied economically by many ways e.g. solar thermal energy, natural coal, bio-gas and/or bio-mass etc. From the prospective of evaporative cooling, the speech focuses on Maisotsenko cycle (M-cycle) based evaporative cooling conception in comparison with conventional direct and indirect evaporative cooling. While adsorption cooling and desiccant air-conditioning systems are focused from the prospective of thermally driven systems. Importance of selection of refrigerant and adsorbent/desiccant is also highlighted. Based on geographic and climatic conditions of Pakistan, role of temporal and spatial variation for the development of sustainable HVAC system is addressed.

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Topic: Large range micro/nanopositioners and their role as the next generation machine tools in the precision industries

Dr. Ammar Al-Jodah, Department of Mechanical and Aerospace Engineering, Monash University, Melbourne, Australia

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Ammar received the PhD degree in Manufacturing Engineering from Monash University in Australia, and M.Sc. degree in Electrical and Computer Engineering from Southern Illinois University Carbondale, USA.

Currently, he is working as a post-doctoral researcher in the Robotics and Mechatronics Research Laboratory, Monash University, Australia.

His research interests include large range micro/nanomanipulation mechanisms, laser interferometry-based measurement systems, robust controller design, and real-time controllers.

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Abstract. The recent developments in micro/nano-positioning technologies have highlighted the demand for compact large range multi-DOF mechanisms for applications such as sample positioning in nanoimprint lithography, scanning probe microscopy, precision machining, and many more. However, this type of mechanisms suffers from a large footprint, sensing difficulties, and low motion accuracy due to the cross-coupling errors. In this speach, a compact design of a multi-DOF micropositioner is presented to achieve large workspace and high motion accuracy. Prismatic- Prismatic-Revolute (PPR) joints were used to construct this mechanism to yield deterministic large range motions. Laser-based measurement technique based on retroreflectors is proposed to sense large translations and rotation simultaneously with nanometer resolution. A prototype of the proposed mechanism was fabricated to investigate the static and dynamic properties of its structure, and compare these with the computational results. The motion accuracy of the mechanism was improved by using a sliding mode controller based on a nonlinear disturbance observer. The cross-coupling effects and modelling uncertainties were estimated and compensated in this control scheme, which consequently improved the tracking performance. The experimental results showed that the proposed designs achieved large workspace, high resolution, and improved tracking performance, which make them play a vital role in precision industries as the next generation of machine tools and end effectors.

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2021.01-2023.12 Honorary Associate Lecturer
2018.12 Successful selected project in 13rd “Chunhui Cup” Oversea Students Innovation and Entrepreneurship Competition
08/2017 Distinction in International Leadership Experience and Development Program
11/2016 Faculty of Engineering and Built Environment Postgraduate Research Prize in Mechanical and Mechatronics Engineering (University of Newcastle)
05/2010 The third prize in Jiangsu Province innovative mechanical designing contest;  02/2010 The Meritorious Winners in The International Mathematical Contest in Modelling
10/2009 The second prize in Southeast University Robcup contest;  05/2009 The first prize in Southeast University Vision-Guided Robotics contest

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Abstract. Management of slurries is an intractable problem in many areas, such as chemical process and waste process. Improving the concentration of the slurry and separating efficiency is in demanding to save the economic and environmental input. Current concentration and transportation of waste slurries are in separated two stages. However, the sedimentation has happened during transportation. This work proposed a numerical model to study the sedimentation of solid phase in the waste slurry with Eulerian-Eulerian approach. The numerical model simulated the effect of inflow velocity and the initial solids fraction of slurry flowing in an open channel. Analysis of the simulated results indicates that increasing the inflow velocity to 0.614 m/s obtained the comprehensive sedimentation results, producing 1 mm high-concentration coal tailings on the bottom. Further increasing the velocity need more time to achieve steady sedimentation. It is also found that slightly increasing the solids fraction to 0.29 improved the concentration.

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Topic: Numerical modelling of sedimentation of solid phase in slurry flow

Dr. Jian Chen, School of Chemical Engineering, The University of Queensland, Australia

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Topic: Distributed Formation Control of Multi-Agent Systems

Dr. Okechi Onuoha, Department of Electrical and Electronic Engineering, University of Manchester, UK

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Okechi Onuoha completed his PhD studies in Electrical and Electronic Engineering at the University of Manchester, UK, in 2020. Here, he was with the Control and Robotics Research group. Since 2020, he has been working as a post-doctoral research associate in the Electrical and Electronic Engineering Department of the University of Manchester, UK. His main research areas include Distributed Multiagent Control, Distributed Optimization, Machine Learning and their applications to Energy and Robotic Systems.

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Abstract. Several of control tasks today are complex and comprise of the interplay of several units/subsystems connected via communication (or sensor) networks. The multi-agent control strategy presents a novel technique for the coordination of many of such complex control tasks. Using this strategy, the subsystems are considered as agents and the network connections are modelled using communication graphs. This talk will briefly review some fundamental concepts and algorithms for multi-agent systems coordination. It will then focus more on formation control of multi-agent systems. Specifically, the talk will present details on key methods such as the consensus-based formation control using the Laplacian matrices and their limitations as well as the affine formation control using the stress-matrices and their challenges.

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