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Robotics： From Automation to Intelligent Systems

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engineering 2018年第4期4卷 446-448页

作者： Eduardo Nebot Director of australian Centre for Field Robotics fellow of the australian academy of technology and engineering Australia

This paper presents a brief overview of the progress that has been made in autonomous robots during the past few years. It presents the fundamental problems that have been addressed to enable the successful deployment of robotic automation in industrial environments. It also describes some of the challenges facing future autonomous applications in more complex scenarios, such as urban vehicle automation.

关键词：自主机器人工业环境发展现状智能系统

Effect of Milling Time on the Microstructure and Tensile Properties of Ultrafine Grained Ni–SiC Composites at Room Temperature

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Journal of Materials Science & technology 2015年第9期31卷 923-929页

作者： Hefei Huang Chao Yang Massey de los Reyes Yongfeng Zhou Long Yan Xingtai Zhou Shanghai Institute of Applied Physics Chinese Academy of Sciences Institute of Materials engineering Australian Nuclear Science and Technology Organisation

Bulk metallic nickel-silicon carbide nano-particle （Ni-SiCNp） composites, with milling time ranged from 8 to 48 h, were prepared in a planetary ball mill and sintered using a spark plasma sintering （SPS） furnace. The microstructure of the Ni-SiCnp composites was characterized by transmission electron microscopy （TEM） and their mechanical properties were investigated by tensile measurements. The TEM results showed well-dispersed SiCNp particles, either within the matrix, between twins or along grain boundaries （GB）, as well as the presence of stacking faults and twin structures, characteristics of materials with low stacking fault energy. Dislocation lines were also observed to interact with the SiCNp which were plastically nondeformable. A synergistic relationship existed between Hall-Perch strength- ening and dispersion strengthening mechanisms, which was shown to greatly influence the mechanical properties of the Ni-SiCNp composites. Both the maximum yield and tensile strengths were found in the Ni-SiCNp composite with a milling time of 48 h, whereas the increased rate of strengths drastically decreased in material milled above 8 h due to the significant SiCNp agglomeration. The ball milling process resulted in the formation of nano-scale, ultra-fine grained （UFG） Ni-SiCNp composites when the milling time was extended for longer periods, greatly strengthening these materials. The sharp decrease in elongation percentages, however, should be comprehensively considered before irrevers- ible inelastic deformation.

关键词： Ni-SiCNp compositeMechanical alloyingSpark plasma sinteringTransmission electron microscopyTensile testUltra-fine grained (UFG)

Cybersecurity Research-Essential to a Successful Digital Future

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engineering 2018年第1期4卷 9-10页

作者： Jackie Craig fellow of the australian academy of Technological Sciences and engineering Australia

The ability of technology to profoundly affect our lives is exem- plified by the digital transformation that is occurring in many aspects of our lives and being played out in the virtual world of cyberspace. Cyberspac... 详细信息

关键词： Cybersecurity Research-Essential Successful Digital Future

Does Global Agriculture Need Another Green Revolution？

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engineering 2018年第4期4卷 449-451页

作者： Danny Llewellyn Chief Research Scientist of CSIRO Agriculture and Food fellow of the australian academy of technology and engineering Australia

1.引言科学和技术是社会变革的历史驱动力,这些变革大多是有益的,但有时会产生意想不到的(通常是环境方面的)后果,其中一些后果我们目前仍在努力应对。18世纪和19世纪的工业革命,带来的以化石燃料为动力的采矿和制造业机械化发展,以及... 详细信息

1.引言科学和技术是社会变革的历史驱动力,这些变革大多是有益的,但有时会产生意想不到的(通常是环境方面的)后果,其中一些后果我们目前仍在努力应对。18世纪和19世纪的工业革命,带来的以化石燃料为动力的采矿和制造业机械化发展,以及航运和陆路运输的快速发展,导致城市化和人口不断增长。即使在18世纪,人口增长率也显然不能保持稳定。随着城市人口的增多和耕地的减少,除非农业生产率能够跟上发展的步伐。

关键词：科学技术发展现状现代农业技术创新

Bounded Real Lemmas for Fractional Order Systems

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International Journal of Automation and computing 2015年第2期12卷 192-198页

作者： Shu Liang Yi-Heng Wei Jin-Wen Pan Qing Gao Yong Wang Department of Automation University of Science and Technology of China School of engineering and Information technology University of New South Wales at the Australian Defence Force Academy

This paper derives the bounded real lemmas corresponding to L∞norm and H∞norm(L-BR and H-BR) of fractional order systems. The lemmas reduce the original computations of norms into linear matrix inequality(LMI) problems, which can be performed in a computationally efficient fashion. This convex relaxation is enlightened from the generalized Kalman-YakubovichPopov(KYP) lemma and brings no conservatism to the L-BR. Meanwhile, an H-BR is developed similarly but with some ***, it can test the system stability automatically in addition to the norm computation, which is of fundamental importance for system analysis. From this advantage, we further address the synthesis problem of H∞control for fractional order systems in the form of LMI. Three illustrative examples are given to show the effectiveness of our methods.

关键词： Fractional order systems L∞norm H∞norm H∞control bounded real lemmas linear matrix inequality(LMI).

Wafer‑Scale Ag_(2)S‑Based Memristive Crossbar Arrays with Ultra‑Low Switching‑Energies Reaching Biological Synapses

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Nano-Micro Letters 2025年第3期17卷 328-339页

作者： Yuan Zhu Tomas Nyberg Leif Nyholm Daniel Primetzhofer Xun Shi Zhen Zhang Division of Solid‑State Electronics Department of Electrical EngineeringUppsala University75121 UppsalaSweden Department of Chemistry Uppsala UniversityUppsalaSweden Department of Physics and Astronomy Uppsala UniversityUppsalaSweden State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050People’s Republic of China

Memristive crossbar arrays(MCAs)offer parallel data storage and processing for energy-efficient neuromorphic ***,most wafer-scale MCAs that are compatible with complementary metal-oxide-semiconductor(CMOS)technology still suffer from substantially larger energy consumption than biological synapses,due to the slow kinetics of forming conductive paths inside the memristive *** we report wafer-scale Ag_(2)S-based MCAs realized using CMOS-compatible processes at temperatures below 160℃.Ag_(2)S electrolytes supply highly mobile Ag+ions,and provide the Ag/Ag_(2)S interface with low silver nucleation barrier to form silver filaments at low energy *** further enhancing Ag+migration in Ag_(2)S electrolytes via microstructure modulation,the integrated memristors exhibit a record low threshold of approximately−0.1 V,and demonstrate ultra-low switching-energies reaching femtojoule values as observed in biological *** low-temperature process also enables MCA integration on polyimide substrates for applications in flexible ***,the intrinsic nonidealities of the memristive units for deep learning can be compensated by employing an advanced training *** impressive accuracy of 92.6%in image recognition simulations is demonstrated with the MCAs after the *** demonstrated MCAs provide a promising device option for neuromorphic computing with ultra-high energy-efficiency.

关键词： Wafer-scale Ag_(2)S films Reactive sputter Silver nucleation Ag^(+)migration Energy-efficient neuromorphic computing

Engineers： The Key to Sustainable Water Use

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engineering 2018年第5期4卷 586-587页

作者： Neil Andrew Chair of Australia's Murray-Darling Basin Authority and fellow of the australian academy of technology and engineering Australia

Although Australia is known for being the world＇s driest inhab-ited continent, water scarcity is hardly an issue that is isolated to just one country. In recent months, the prolonged drought in South Africa has led to a water crisis that prompted real and urgent warn-ings that Cape Town, the country＇s second-largest city, faced the possibility of running out of water. In India, the northern summer has brought on a repeat of acute water shortages, with reports of taps running dry in many areas and with one policy think-tank warning that around 600 million people in India are facing water stress.

关键词：印度水资源发展现状保护措施

ANALYTICAL SOLUTIONS FOR A ONE-DIMENSIONAL CHEMO-MECHANICAL COUPLING PROBLEM

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Acta Mechanica Solida Sinica 2014年第2期27卷 137-145页

作者： Qingsheng Yang Hui Tian Qinghua Qin Department of engineering Mechanics Beijing University of Technology Research School of engineering Australian National University

Chemo-mechanical coupling exists in a lot of intelligent materials including hy- drogels, biological tissues and other soft materials. These materials are able to respond to ex- ternal stimulus, such as temperature, chemical concentration, and pH value. In this paper, a one-dimensional theoretical model for chemo-mechanical coupling is proposed for analyzing the uniaxial stress/strain state of coupling materials. Based on the chemo-mechanical coupled gov- erning equation, the displacement function and concentration function are derived and the stress and chemical potential are obtained. It is shown that the present chemo-mechanical theory can characterize the chemo-mechanical coupling behavior of intelligent materials.

关键词： intelligent materials chemo-mechanical coupling analytical solution theoretical model constitutive equations hydrogel

Velocity Profiles between Two Baffles in a Shell and Tube Heat Exchanger

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Journal of Thermal Science 2015年第4期24卷 356-363页

作者： Tae-Hyun Chang Chang-Hoan Lee Hae-Soo Lee Kwon-Soo Lee Senior Research fellow of RESEAT Korea Institute of Science and Technology Information Korea Institute of Science and technology Information Postdoctoral Research fellow School of Mechanical Engineering of Kyungnam University International University of Korea

Heat exchangers are extensively utilized for waste heat recovery,oil refining,chemical processing,and steam *** this study,velocity profiles are measured using a 3D particle image velocimetry(PIV)system between two baffles in a shell and tube heat exchanger for parallel and counter *** PIV and computational fluid dynamics results show the occurrence of some strong vectors near the *** vectors are assumed due to the clearance between the inner tubes and the front ***,the major parts of the vectors are moved out through the bottom opening of the rear baffle,and other vectors produce a large circle between the two *** simulations are conducted to investigate the effects of the baffle on the heat exchanger using the Fluent *** k-εturbulence model is employed to calculate the flows along the heat exchanger.

关键词： Baffle P1V Shell and tube heat exchanger Cut off ratio CFD