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International Journal of Digital Earth 2015年第9期8卷 679-693页

作者： max Craglia Lea Shanley European Commission Joint Research CentreIspraItaly Gaylord Nelson Institute for Environmental Studies University of WisconsinMadisonWIUSA

The global landscape in the supply,co-creation and use of geospatial data is changing very rapidly with new satellites,sensors and mobile devices reconfiguring the traditional lines of demand and supply and the number of actors *** this paper we chart some of these technology-led developments and then focus on the opportunities they have created for the increased participation of the public in generating and contributing information for a wide range of uses,scientific and *** all this information is open or geospatial,but sufficiently large portions of it are to make it one of the most significant phenomena of the last *** fact,we argue that while satellite and sensors have exponentially increased the volumes of geospatial information available,the participation of the public is transformative because it expands the range of participants and stakeholders in society using and producing geospatial information,with opportunities for more direct participation in science,politics and social action.

关键词： citizen science volunteered geographic information geospatial data

Digital twin-driven smart supply chain

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Frontiers of Engineering Management 2022年第1期9卷 56-70页

作者： Lu WANG Tianhu DENG Zuo-Jun max SHEN Hao HU Yongzhi QI Department of Industrial Engineering Tsinghua UniversityBeijing 100084China Faculty of Engineering and Faculty of Business and Economics University of Hong KongHong Kong 999077China Department of Industrial Engineering and Operations Research and Department of Civil and Environmental Engineering University of CaliforniaBerkeleyBerkeleyCA 94720USA *** Beijing 100101China

Today’s supply chain is becoming complex and ***,supply chain managers need to create and unlock the value of the smart supply chain.A smart supply chain requires connectivity,visibility,and agility,and it needs be integrated and *** digital twin(DT)concept satisfies these ***,we propose creating a DT-driven supply chain(DTSC)as an innovative and integrated solution for the smart supply *** provide background information to explain the DT concept and to demonstrate the method for building a DTSC by using the DT *** discuss three research opportunities in building a DTSC,including supply chain modeling,real-time supply chain optimization,and data usage in supply chain ***,we highlight a motivating case from ***,China’s largest retailer by revenue,in applying the DTSC platform to address supply chain network reconfiguration challenges during the COVID-19 pandemic.

关键词： digital twin supply chain management

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Dynamic wheeled motion control of wheel-biped transformable robots

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Biomimetic Intelligence & Robotics 2022年第2期2卷 1-8页

作者： Chao Zhang Tangyou Liu Shuang Song Jiaole Wang max Q-H.Meng The School of Mechanical Engineering and Automation Harbin Institute of TechnologyShenzhen 518055China Department of Electronic and Electrical Engineering Southern University of Science and TechnologyShenzhen 518055China

Most existing biped robots can only walk with their feet or move by *** combine the best of both worlds,this paper introduces the dynamic wheeled control including wheeled locomotion and in-situ wheel-to-foot(WtF)transformation of a full-sized wheel-biped transformable robot *** can traverse on flat surfaces by wheels and transform to footed stance through its switching modules when facing *** wheeled locomotion,the kinematics considering upper-body lumped center-of-mass(CoM)constraint is first ***,the dynamics of wheeled locomotion is modeled as a wheeled inverted pendulum(WIP)with variables related to the pose of upper *** that,a parameter-varying linear quadratic regulator(LQR)controller is utilized to enable dynamic wheeled *** WtF transformation,the WtF balance constraints are first ***,a WtF transformation strategy is proposed to tackle the problem when robot transforms from wheeled balance state to in-situ biped stance *** enables the robot to pass by the transition stages in which both wheels and feet touch the ground and to maintain its balance at the same *** and experiments on the SR600-II prototype have validated the efficacy of proposed dynamic wheeled control strategies for both wheeled locomotion and in-situ WtF transformation.

关键词： Wheel-biped transformable robot Dynamic control Wheeled locomotion Parameter-varying LQR control Wheel-to-foot transformation

Nitric oxide regulation of plant metabolism

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Molecular Plant 2022年第2期15卷 228-242页

作者： Kapuganti Jagadis Gupta Vemula Chandra Kaladhar Teresa B.Fitzpatrick Alisdair R.Fernie Ian max Møller Gary J.Loake National Institute of Plant Genome Research Aruna Asaf Ali MargNew DelhiDelhi 110067 India Vitamins and Environmental Stress Responses in Plants Department of Botany and Plant BiologyUniversity of GenevaGeneva 1211 Switzerland max-Planck-Institute of Molecular Plant Physiology Am Mühlenberg 1Potsdam-Golm 14476 Germany Department of Molecular Biology and Genetics Aarhus UniversityForsøgsvej 14200 SlagelseDenmark Institute of Molecular Plant Sciences School of Biological SciencesUniversity of EdinburghEdinburgh EH93BFUK

Nitric oxide(NO)has emerged as an important signal molecule in plants,having myriad roles in plant *** addition,NO also orchestrates both biotic and abiotic stress responses,during which intensive cellular metabolic reprogramming *** to these responses is the location of NO biosynthetic and scavenging pathways in diverse cellular compartments,enabling plants to effectively organize signal transduction *** regulates plant metabolism and,in turn,metabolic pathways reciprocally regu-late NO accumulation and ***,these diverse cellular processes are inextricably *** re-view addresses the numerous redox pathways,located in the various subcellular compartments that pro-duce NO,in addition to the mechanisms underpinning NO *** focus on how this molecular dance is integrated into the metabolic state of the *** this context,a reciprocal relationship be-tween NO accumulation and metabolite production is often *** also showcase cellular pathways,including those associated with nitrate reduction,that provide evidence for this integration of NO function and ***,we discuss the potential importance of the biochemical reactions governing NO levels in determining plant responses to a changing environment.

关键词： hypoxi amitochondria metabolism nitric oxide S-nitrosylation pyridoxine reactive nitrogen species reactive oxygen species

Three paternally imprinted regions are sequentially required in prenatal and postnatal mouse development

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Science China(Life Sciences) 2020年第1期63卷 165-168页

作者： max Jiahua Li Xiajun Li School of Life Sciences and Technology Shanghai Tech University

Reproduction in mammals is primarily through fertilization of the oocytes and sperms generated by the females and males,*** of two haploid genomes leads to formation of the diploid zygotes,which sequentially gives rise to the pre-implantation and post-implantation embryos before live pups are *** asexual reproduction does occur in lower animals such as amphibians,it has never been achieved in mammals before until very recently.

关键词： sequentially implantation primarily

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A system for underground road condition monitoring

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International Journal of Mining Science and Technology 2020年第3期30卷 405-411页

作者： max Astrand Erik Jakobsson Martin Lindfors John Svensson KTH Royal Institute of Technology SE-10044 StockholmSweden ABB Corporate Research SE-72226 VästeråsSweden Epiroc SE-70191ÖrebroSweden Linköping University SE-58183 LinköpingSweden Boliden Mines SE-93632 BolidenSweden

Poor road conditions in underground mine tunnels can lead to decreased production efficiency and increased wear on production vehicles. A prototype system for road condition monitoring is presented in this paper to counteract this. The system consists of three components i.e. localization, road monitoring, and scheduling. The localization of vehicles is performed using a Rao-Blackwellized extended particle filter, combining vehicle mounted sensors with signal strengths of Wi Fi access points. Two methods for road monitoring are described: a Kalman filter used together with a model of the vehicle suspension system, and a relative condition measure based on the power spectral density. Lastly, a method for taking automatic action on an ill-conditioned road segment is proposed in the form of a rescheduling *** scheduling algorithm is based on the large neighborhood search and is used to integrate road service activities in the short-term production schedule while minimizing introduced production *** system is demonstrated on experimental data collected in a Swedish underground mine.

关键词： Localization Road condition monitoring Scheduling Underground mining

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Towards world-class science and innovation system——on culture of excellence and integrity, mentoring and collaboration

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National Science Review 2014年第4期1卷 478-480页

作者： Gaoqing max Lu The University of Queensland

he year 2014 may prove to be a major turning point in China’s development of world-class science and innovation *** the mid-term juncture of China’s Medium-and Long-Term Program(MLP)for Science and Technology(S&T)de... 详细信息

关键词： Towards world-class science and innovation system mentoring and collaboration

Impact of insulator layer thickness on the performance of metal-MgO-ZnO tunneling diodes

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Nano Research 2016年第5期9卷 1290-1299页

作者： Yousong Gu max A. Migliorato Yue Zhang State Key Laboratory for Advanced Metals and Materials School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China Beijing Municipal Key Laboratory of New Energy Materials and Technologies Beijing 100083 China School of Electrical and Electronic Engineering University of Manchester Manchester M13 9PL UK

The performance of metal-insulator-semiconductor （MIS） type tunneling diodes based on ZnO nanostructures is investigated through modeling. The framework used in this work is the Schr6dinger equation with an effective-mass approximation. The working mechanism of the MIS type tunneling diode is investigated by examining the electron density, electric field, electrostatic potential, and conduction band edge of the device. We show that a valley in the electrostatic potential is formed at the ZnO/MgO interface, which induces an energy barrier at the ZnO side of this interface. Therefore, electrons need to overcome two barriers： the high and narrow MgO barrier, and the barrier from the depletion region induced at the ZnO side of the ZnO/MgO interface. As the MgO layer becomes thicker, the valley in electrostatic potential becomes deeper. At the same time, the barrier induced at the ZnO/MgO interface becomes higher and wider. This leads to a fast decrease in the current passing through the MIS diode. We optimize the thickness of the MgO insulating layer, sandwiched between a ZnO film （in this work we use a single ZnO nanowire） and a metal contact, to achieve maximum performance of the diode, in terms of rectification ratio. An optimal MgO layer thickness of 1.5 nm is found to yield the highest rectification ratio, of approximately 169 times that of a conventional metal-semiconductor-metal Schottky diode. These simulated results can be useful in the design and optimization of ZnO nanodevices, such as light emitting diodes and UV photodetectors.

关键词： metal-insulator-semicon ductor (MIS) diode ZnO nanodevices MgO layer tunneling mechanism

Bridging Methods for Atomistic-to-Continuum Coupling and Their Implementation

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Communications in Computational Physics 2010年第4期7卷 831-876页

作者： Pablo Seleson max Gunzburger Department of Scientific Computing Florida State UniversityTallahasseeFL 32306-4120USA

Several issues connected with bridging methods for atomistic-to-continuum(AtC)coupling are *** coupling approaches using various energy blending models are studied as well as the influence that model parameters,blending functions,and grids have on simulation *** use the Lagrange multiplier method for enforcing constraints on the atomistic and continuum displacements in the bridge *** also show that continuum models are not appropriate for dealing with problems with singular loads,whereas AtC bridging methods yield correct results,thus justifying the need for a multiscale *** investigate models that involve multiple-neighbor interactions in the atomistic region,particularly focusing on a comparison of several approaches for dealing with Dirichlet boundary conditions.

关键词： Multiscale modeling atomistic-to-continuum coupling boundary treatment

Nanomaterials for Clean Air, Energy and Water

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Progress in Natural Science:Materials International 2018年第2期28卷 97-98页

作者： G.Q.(max) Lu University of Surrey

In the last decade,environmental pressures due to air and water pollution and the drive for clean energy supply are rising,which have led to the tremendous interest and investment in sustainable materials *** has been at the forefront of research and development of clean technologies for air,water and energy not surprisingly because of the strong need for such technologies to balance development and

关键词： Energy and Water Nanomaterials for Clean Air