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Author Correction: Hotspots of biogeochemical activity linked to aridity and plant traits across global drylands

Nature plants 2024年第5期10卷 829页

作者： David J Eldridge Jingyi Ding Josh Dorrough Manuel Delgado-Baquerizo Osvaldo Sala Nicolas Gross Yoann Le Bagousse-Pinguet Max Mallen-Cooper Hugo Saiz Sergio Asensio Victoria Ochoa Beatriz Gozalo Emilio Guirado Miguel García-Gómez Enrique Valencia Jaime Martínez-Valderrama César Plaza Mehdi Abedi Negar Ahmadian Rodrigo J Ahumada Julio M Alcántara Fateh Amghar Luísa Azevedo Farah Ben Salem Miguel Berdugo Niels Blaum Bazartseren Boldgiv Matthew Bowker Donaldo Bran Chongfeng Bu Rafaella Canessa Andrea P Castillo-Monroy Ignacio Castro Patricio Castro-Quezada Simone Cesarz Roukaya Chibani Abel Augusto Conceição Anthony Darrouzet-Nardi Yvonne C Davila Balázs Deák Paloma Díaz-Martínez David A Donoso Andrew David Dougill Jorge Durán Nico Eisenhauer Hamid Ejtehadi Carlos Ivan Espinosa Alex Fajardo Mohammad Farzam Ana Foronda Jorgelina Franzese Lauchlan H Fraser Juan Gaitán Katja Geissler Sofía Laura Gonzalez Elizabeth Gusman-Montalvan Rosa Mary Hernández Norbert Hölzel Frederic Mendes Hughes Oswaldo Jadan Anke Jentsch Mengchen Ju Kudzai F Kaseke Melanie Köbel Anika Lehmann Pierre Liancourt Anja Linstädter Michelle A Louw Quanhui Ma Mancha Mabaso Gillian Maggs-Kölling Thulani P Makhalanyane Oumarou Malam Issa Eugene Marais Mitchel McClaran Betty Mendoza Vincent Mokoka Juan P Mora Gerardo Moreno Seth Munson Alice Nunes Gabriel Oliva Gastón R Oñatibia Brooke Osborne Guadalupe Peter Margerie Pierre Yolanda Pueyo R Emiliano Quiroga Sasha Reed Ana Rey Pedro Rey Víctor Manuel Reyes Gómez Víctor Rolo Matthias C Rillig Peter C le Roux Jan Christian Ruppert Ayman Salah Phokgedi Julius Sebei Anarmaa Sharkhuu Ilan Stavi Colton Stephens Alberto L Teixido Andrew David Thomas Katja Tielbörger Silvia Torres Robles Samantha Travers Orsolya Valkó Liesbeth van den Brink Frederike Velbert Andreas von Heßberg Wanyoike Wamiti Deli Wang Lixin Wang Glenda M Wardle Laura Yahdjian Eli Zaady Yuanming Zhang Xiaobing Zhou Fernando T Maestre Centre for Ecosystem Science School of Biological Earth and Environmental Sciences University of New South Wales Sydney New South Wales Australia. State Key Laboratory of Earth Surface Processes and Resource Ecology Faculty of Geographical Science Beijing Normal University Beijing China. jingyiding@***. Department of Planning and Environment Merimbula New South Wales Australia. Fenner School of Environment & Society Australian National University Canberra Australian Capital Territory Australia. Laboratorio de Biodiversidad y Funcionamiento Ecosistémico Instituto de Recursos Naturales y Agrobiología de Sevilla (IRNAS) CSIC Seville Spain. Schools of Life Sciences School of Sustainability and Global Drylands Center Arizona State University Tempe AZ USA. Université Clermont Auvergne INRAE VetAgro Sup Unité Mixte de Recherche Ecosystème Prairial Clermont-Ferrand France. Aix Marseille Univ CNRS Avignon Université IRD IMBE Aix-en-Provence France. Department of Forest Ecology and Management Swedish University of Agricultural Sciences (SLU) Umeå Sweden. Departamento de Ciencias Agrarias y Medio Natural Escuela Politécnica Superior Instituto Universitario de Investigación en Ciencias Ambientales de Aragón (IUCA) Universidad de Zaragoza Huesca Spain. Instituto Multidisciplinar para el Estudio del Medio 'Ramón Margalef' Universidad de Alicante Alicante Spain. Instituto de Ciencias Agrarias Consejo Superior de Investigaciones Científicas Madrid Spain. Departamento de Ingeniería y Morfología del Terreno Escuela Técnica Superior de Ingenieros de Caminos Canales y Puertos Universidad Politécnica de Madrid Madrid Spain. Departmento de Biodiversidad Ecología y Evolución Facultad de Ciencias Biológicas Universidad Complutense de Madrid Madrid Spain. Estación Experimental de Zonas Áridas (EEZA) CSIC Campus UAL Almería Spain. Department of Range Management Faculty of Natural Resources and Marine Sciences Tarbiat Modares University Noor Iran. Instituto Nacional de T

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Effect of mullite content on the properties of silica-based ceramic cores

Effect of mullite content on the properties of silica-based ...

引用

Chinese Materials Congress, CMC 2014

作者： Fan, Hong Na Ji, Hui Ming Tang, Ding Zhong Liu, Xiao Guang Yao, Jian Sheng Li, Xin Gu, Guo Hong Wang, Li Li Niu, Shu Xin Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education School of Materials Science and Engineering Tianjin University Tianjin300072 China Science and Technology on Advanced High Temperature Structural Materials Laboratory Beijing Institute of Aeronautical Materials Beijing100095 China

ISBN: (纸本)9783038353959

In this study, mullite was used as the addition to prepare silicon based ceramic cores, and the effect of mullite content on the mechanical and chemical properties was investigated. The phase composition and the morphology of the ceramic cores were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) respectively. The results indicated that the shrinkage was induced by the addition of mullite and contaminations. The intensity of pre-heated cristobalite increased sharply with the mullite content increasing, which could improve the high temperature deformation simultaneously. However, mullite was difficult to remove by reacting with KOH which decreased the leaching rate of ceramic core. When mullite content was 15 wt%, the shrinkage of ceramic core was 0.78%, the creep at 1540 °C for 1 h was 0.3 mm and the leaching rate was 0.1 g/min, which meets the need of ceramic core of hollow turbine blades. © (2015) Trans Tech Publications, Switzerland.

关键词： Superalloys

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Microfluidic Bioprinting: Digitally Tunable Microfluidic Bioprinting of Multilayered Cannular Tissues (Adv. Mater. 43/2018)

引用

advanced Materials 2018年第43期30卷

作者： Qingmeng Pi Sushila Maharjan Xiang Yan Xiao Liu Bijay Singh Anne Metje van Genderen Felipe Robledo‐Padilla Roberto Parra‐Saldivar Ning Hu Weitao Jia Changliang Xu Jian Kang Shabir Hassan Haibo Cheng Xu Hou Ali Khademhosseini Yu Shrike Zhang Division of Engineering in Medicine Brigham and Women's Hospital Harvard Medical School Cambridge MA 02139 USA Harvard‐MIT Division of Health Sciences and Technology Massachusetts Institute of Technology Cambridge MA 02139 USA Department of Plastic and Reconstructive Surgery Renji Hospital Shanghai Jiao Tong University School of Medicine Shanghai 200127 China Research Institute for Bioscience and Biotechnology Nakkhu‐4 Lalitpur 44600 Nepal Department of Urology Drum Tower Hospital Medical School of Nanjing University Institute of Urology Nanjing University Nanjing 210008 China Department of Urology Anqing Petrochemical Hospital Nanjing Gulou Hospital Group Anqing 246002 China Beijing Advanced Innovation Center for Biomedical Engineering Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education School of Biological Science and Medical Engineering Beihang University Beijing 100083 China School of Engineering and Applied Sciences Harvard University Cambridge MA 02138 USA ENCIT – Science Engineering and Technology School Tecnologico de Monterrey Monterrey 64849 Mexico Biosensor National Special Laboratory Key Laboratory of Biomedical Engineering of Education Ministry Department of Biomedical Engineering Zhejiang University Hangzhou 310027 China Department of Orthopedic Surgery Shanghai Jiaotong University Affiliated Sixth People's Hospital Shanghai Jiaotong University Shanghai 200233 China The First Clinical Medical College Nanjing University of Chinese Medicine Jiangsu Collaborative Innovation Center of Traditional Chinese Medicine Prevention and Treatment of Tumor Nanjing University of Chinese Medicine Nanjing 210023 China State Key Laboratory of Physical Chemistry of Solid Surface College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China Research Institute for Soft Matter and Biomimetics College of Physical Science and Engineering Xiamen University Xiamen 361005 China Department of Bioengineering Department of Chemical and Biomolecular Engineering Henry Samueli School of

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Measuring holographic entanglement entropy on a quantum simulator

arXiv

引用

arXiv 2017年

作者： Li, Keren Han, Muxin Qu, Dongxue Huang, Zichang Long, Guilu Wan, Yidun Lu, Dawei Zeng, Bei Laflamme, Raymond Shenzhen Institute for Quantum Science and Engineering Department of Physics Southern University of Science and Technology Shenzhen518055 China Center for Quantum Computing Peng Cheng Laboratory Shenzhen518055 China Institute for Quantum Computing and Department of Physics and Astronomy University of Waterloo WaterlooONN2L 3G1 Canada State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics Tsinghua University Beijing100084 China Department of Physics Florida Atlantic University 777 Glades Road Boca RatonFL33431 United States Institut für Quantengravitation Universität Erlangen-Nürnberg Staudtstr. 7/B2 Erlangen91058 Germany State Key Laboratory of Surface Physics Fudan University Shanghai200433 China Department of Physics and Center for Field Theory and Particle Physics Fudan University Shanghai200433 China Institute for Nanoelectronic devices and Quantum computing Fudan University Shanghai200433 China Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing210093 China Shenzhen Key Laboratory of Quantum Science and Engineering Shenzhen518055 China Department of Mathematics and Statistics University of Guelph GuelphONN1G 2W1 Canada Perimeter Institute for Theoretical Physics WaterlooONN2L 2Y5 Canada

Quantum simulation promises to have wide applications in many fields where problems are hard to model with classical computers. Various quantum devices of different platforms have been built to tackle the problems in, say, quantum chemistry, condensed matter physics, and high-energy physics. Here, we report an experiment towards the simulation of quantum gravity by simulating the holographic entanglement entropy. On a six-qubit nuclear magnetic resonance quantum simulator, we demonstrate a key result of Anti-de Sitter/conformal field theory(AdS/CFT ) correspondence-the Ryu-Takayanagi formula is demonstrated by measuring the relevant entanglement entropies on the perfect tensor state. The fidelity of our experimentally prepared the six-qubit state is 85.0% via full state tomography and reaches 93.7%if the signal-decay due to decoherence is taken into account. Our experiment serves as the basic module of simulating more complex tensor network states that exploring AdS/CFT correspondence. As the initial experimental attempt to study AdS/CFT via quantum information processing, our work opens up new avenues exploring quantum gravity phenomena on quantum simulators. Copyright © 2017, The Authors. All rights reserved.

关键词： Quantum chemistry

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Evidence for a Z2 topological ordered quantum spin liquid in a kagome-lattice antiferromagnet

arXiv

引用

arXiv 2017年

作者： Wei, Yuan Feng, Zili Lohstroh, Wiebke Yu, D.H. dela Cruz, Clarina Yi, Wei Ding, Z.F. Zhang, J. Tan, Cheng Shu, Lei Wang, Yan-Cheng Wu, Han-Qing Luo, Jianlin Mei, Jia-Wei Meng, Zi Yang Shi, Youguo Li, Shiliang Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing100190 China School of Physical Sciences University of Chinese Academy of Sciences Beijing100190 China Technische Universität München Garching D-85747 Germany Australian Nuclear Science and Technology Organization Lucas HeightsNSW2232 Australia Neutron Scattering Division Neutron Sciences Directorate Oak Ridge National Laboratory Oak RidgeTN37831 United States Semiconductor Device Materials Group National Institute for Materials Science 1-1 Namiki Tsukuba Ibaraki305-0044 Japan State Key Laboratory of Surface Physics Department of Physics Fudan University Shanghai200433 China Collaborative Innovation Center of Advanced Microstructures Nanjing210093 China School of Physics Sun Yat-Sen University Guangzhou510275 China Songshan Lake Materials Laboratory Dongguan Guangdong523808 China Institute for Quantum Science and Engineering Department of Physics Southern University of Science and Technology Shenzhen518055 China Center of Materials Science andOptoelectronicsEngineeringUniversity of Chinese Academy of Sciences Beijing100049 China

A quantum spin liquid with a Z2 topological order has long been thought to be important for the application of quantum computing and may be related to high-temperature superconductivity [1–3]. While a two-dimensional kagome antiferromagnet may host such a state, strong experimental evidences are still lacking [4–9]. Here we show that the spin excitations from the kagome planes in magnetically ordered Cu4(OD)6FBr and non-magnetically ordered Cu3Zn(OD)6FBr are similarly gapped although the content of inter-kagome-layer Cu2+ ions changes dramatically. This suggests that the spin triplet gap and continuum of the intrinsic kagome antiferromagnet are robust against the interlayer magnetic impurities. Our results show that the ground state of Cu3Zn(OD)6FBr is a gapped quantum spin liquid with Z2 topological order. Copyright © 2017, The Authors. All rights reserved.

关键词： Ground state

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Cover Feature: Vertically Aligned Co9S8 Nanotube Arrays onto Graphene Papers as High‐Performance Flexible Electrodes for Supercapacitors (Chem. Eur. J. 10/2018)

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Chemistry – A European Journal 2017年第10期24卷 2294-2294页

作者： Dongbin Xiong Prof. Xifei Li Prof. Zhimin Bai Jianwei Li Dr. Yan Han Prof. Dejun Li Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral Materials School of Materials Science and Technology China University of Geosciences Beijing 100083 P.R. China Tianjin International Joint Research Centre of Surface Technology for Energy Storage Materials College of Physics and Materials Science Tianjin Normal University Tianjin 300387 P.R. China Institute of Advanced Clean Energy Xi'an University of Technology Xi'an 710048 P.R. China Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) Collaborative Innovation Center of Chemical Science and Engineering College of Chemistry Nankai University Tianjin 300071 P.R. China

Vertically aligned Co9S8 nanotube arrays are deposited on conductive graphene paper as a flexible electrode. The Co9S8 nanotubes expose more electrochemical active sites to the electrolyte for effective ion transport (e.g., OH−), while the graphene paper is a robust substrate that effectively accelerates electron transport. The designed flexible electrode may be potentially utilized in portable/wearable electronics. More information can be found in the Communication by X. Li, Z. Bai, D. Li et al. on page 2339.

关键词： Co9S8 Graphene papers Nanotube arrays Supercapacitors Three-dimensional configuration

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surface photovoltage phase spectra for analysing the photoinduced charge transfer kinetics of novel BiOBr/Bi2S3 heterojunction films

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AIP Conference Proceedings 2017年第1期1794卷

作者： Huimin Jia Weiwei He Yong Xiang Zhi Zheng 1School of Energy Science and Engineering University of Electronic Science and Technology of China Chengdu 611731 P. R. China 2Key Laboratory for Micro-Nano Energy Storage and Conversion Materials of Henan Province College of Advanced Materials and Energy Institute of Surface Micro and Nano Materials Xuchang University Henan 461000 P. R. China

The rational design of high performance hetero-structure photovoltaic devices requires full understanding of the photoinduced charge transfer mechanism and kinetics at the interface of heterojunctions. In this paper, p-BiOBr/n-Bi2S3 heterojunction have been designed and in-situ fabricated by a facile ion exchange method between BiOBr and thioacetamide (TAA). The degree of transformation of BiOBr to Bi2S3 was controlled through the adjustment of exposure time of BiOBr/FTO substrate to thioacetamide (TAA) aqueous solution. The morphologies of BiOBr and BiOBr/Bi2S3 heterojunctions films were examined by X-ray diffraction (XRD), scanning electron microscope (SEM) and high resolution transmission electron microscopy (HRTEM). The presence of Bi2S3 was further validated through energy dispersive X-ray spectroscopy (EDS). Assisted by the surface photovoltage (SPV) and transient photovoltage (TPV) technique, the photoinduced charge transfer kinetics on BiOBr nanosheet and BiOBr/Bi2S3 interface were systematically investigated. It was found that the BiOBr/Bi2S3 nanosheet array heterojunctions were more efficient in facilitating the separation of photoinduced charge carriers than pure BiOBr film, which attributable to the stronger photo absorption and better photogenerated charge carrier separation and transport efficiency. This solution-based process directly on FTO offers the promise for low-cost, large-area application of the manufacturing of the third generation thin-film photovoltaic devices.

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A study on single-crystal alloy surface’s structure and performance of laser shock peening without absorbent coating

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AIP Conference Proceedings 2016年第1期1783卷

作者： Wang Xin Tang Zhihui Liu Chenguang Li ChunZhi Zhao Zhenye 1Surface Engineering Institution AECC Beijing Institute of Aeronautical Materials Beijing China 2Aviation Key Laboratory of Advanced Corrosion and Protection on Aviation Materials AECC Beijing Institute of Aeronautical Materials Beijing China 3National Key Laboratory of Advance High Temperature Structural Material AECC Beijing Institute of Aeronautical Materials Beijing China

in order to determine how the laser shock peening without absorbent coating (LSPwC) affects Ni-base single-crystal superalloy, DD11, the surface structure and hardness gradient of single-crystal alloy after LSPwC of two pulse energies. The result shows that the width of linear structure is in direct proportion to the laser impact energy by observing the “linear” deformed structure through the scanning electron microscope, and the linear structure’s length increases when the pulse energy increases from 3J to 5J; the observation by the transmission electron microscope at ×10 000 show s that the linear structure is actually the “line cluster” formed by more than one parallel “fine lines”, and the fine lines are along the the [111] direction; the observation under a high resolution shows that fine lines are the single-crystal structure, the twinning plane is (1–11), and the twinning direction is [1–1–2].

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Microstructure and corrosion resistance of vanadium films deposited at different target-substrate distance by HPPMS

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Rare Metals 2014年第5期33卷 587-593页

作者： Chun-Wei Li Xiu-Bo Tian Tian-Wei Liu Jian-Wei Qin Chun-Zhi Gong State Key Laboratory of Advanced Welding and Joining Harbin Institute of Technology College of Engineering and Technology Northeast Forestry University State Key Laboratory of Surface Physics and Chemistry China Academy of Engineering Physics

High power pulsed magnetron sputtering（HPPMS）, a novel physical vapor deposition technology, was applied to prepare vanadium films on aluminum alloy substrate in this paper. The influence of target–substrate distance（Dt–s）（ranging from 8 to 20 cm） on phase structure, surface morphology, deposition rate, and corrosion resistance of vanadium films was investigated. The results show that the vanadium films are textured with a preferential orientation in the（111） direction except for that fabricated at 20 cm. With Dt–sincreasing, the intensity of（111） diffraction peak of the films decreases and there exists a proper distance leading to the minimum surface roughness of 0.65 nm. The deposition rate decreases with Dt–sincreasing. All the V-coated aluminum samples possess better corrosion resistance than the control sample. The sample fabricated at Dt–sof 12 cm demonstrates the best corrosion resistance with the corrosion potential increasing by 0.19 V and the corrosion current decreasing by an order of magnitude compared with that of the substrate. The samples gain further improvement in corrosion resistance after annealing, and if compared with that of annealed aluminum alloy, then the corrosion potential of the sample fabricated at 20 cm increases by 0.415 V and the corrosion current decreases by two orders of magnitude after annealed at 200 °C. If the annealing temperature further rises to 300 °C, then the corrosion resistance of samples increases less obviously than that of the control sample.

关键词： High power pulsed magnetron sputtering Vanadium films Target–substrate distance Microstructure Corrosion resistance

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Low-order harmonics analysis and suppression method for 400Hz single-phase VSI

Low-order harmonics analysis and suppression method for 400H...

引用

Annual IEEE Conference on Applied Power Electronics Conference and Exposition (APEC)

作者： Guoqing Yuan Siqin Luo Shiying Zhou Xudong Zou Kaifeng Zou State Key Laboratory of Advanced Electromagnetic Engineering and Technology HUST Wuhan Hubei China Qingdao Branch of Naval Aeronautical Engineering Institute Qingdao Shandong China

ISBN: (纸本)9781479967360

It is necessary to insert a dead-time in sinusoidal pulse width modulation (SPWM) voltage source inverter (VSI) to prevent a short circuit in the DC link. However, this will cause the dead-time effect, drop the fundamental voltage and introduce the 3 rd , 5 th and 7 th low-order harmonics into the output voltage. Conventional dead-time compensation methods either average voltage based or inductor current feedback compensation cannot be adopted in the case of high inductor ripple current. Moreover, even with high-precision detection of the inductor current polarity, the conventional methods are still not suitable when unipolar frequency doubling SPWM method is adopted. Dead-time effect is different when different SPWM methods are used. In this paper, dead-time effect of unipolar frequency doubling SPWM is analyzed and a new approach for eliminating low-order harmonics is proposed. Simulation and experiment on a 400-Hz prototype both show satisfactory results and verify the validity of the analysis and the effectiveness of the proposed control method.

关键词： Inductors Power harmonic filters Harmonic analysis Inverters Voltage control Resonant frequency Delays

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