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Effects of incident energy and angle on carbon cluster ions implantation on silicon substrate:a molecular dynamics study

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Journal of Semiconductors 2017年第9期38卷 8-13页

作者： Ye Wei Shengbo Sang Bing Zhou Xiao Deng Jing Chai Jianlong Ji Yang Ge Yuanliang Huo Wendong Zhang Micro-Nano System Research Center Key Laboratory of Advanced Transducers and Intelligent Control SystemCollege of Information EngineeringTaiyuan University of TechnologyTaiyuan 030024China Research Institute of Surface Engineering Taiyuan University of TechnologyTaiyuan 030024China College of Physics and Optoelectronics Taiyuan University of TechnologyTaiyuan 030024China

Carbon cluster ion implantation is an important technique in fabricating functional devices at mi- cro/nanoscale. In this work, a numerical model is constructed for implantation and implemented with a cutting- edge molecular dynamics method. A series of simulations with varying incident energies and incident angles is performed for incidence on silicon substrate and correlated effects are compared in detail. Meanwhile, the behav- ior of the cluster during implantation is also examined under elevated temperatures. By mapping the nanoscopic morphology with variable parameters, numerical formalism is proposed to explain the different impacts on phrase transition and surface pattern formation. Particularly, implantation efficiency （IE） is computed and further used to evaluate the performance of the overall process. The calculated results could be properly adopted as the theoretical basis for designing nano-structures and adjusting devices＇ properties.

关键词： implantation low incident energies irradiation molecular dynamics

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The association for the advancement of artificial intelligence 2020 workshop program

The association for the advancement of artificial intelligen...

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作者： Bang, Grace Barash, Guy Bea, Ryan Cali, Jacques Castillo-Effen, Mauricio Chen, Xin Cynthia Chhaya, Niyati Dhoopar, Rohan Dumancic, Sebastijan Espinoza, Huáscar Farchi, Eitan Fioretto, Ferdinando Fuentetaja, Raquel Galley, Michel Geib, Christopher Hernández-Orallo, José Huang, Xiaowei Keren, Sarah Kim, Seokhwan Jaidka, Kokil Liu, Xiaomo Lu, Tyler Ma, Zhiqiang Mallah, Richard McDermid, John Michalowski, Martin Mirsky, Reuth Héigeartaigh, Seán Ó. Ramachandran, Deepak Segovia-Aguas, Javier Shaban-Nejad, Arash Shehory, Onn Shwartz, Vered Srivastava, Siddharth Talamadupula, Kartik Tang, Jian Zhang, Dell Zhang, Jian S&P Global. Western Digital University of Southampton United Kingdom Blue Prism Group PLC Lockheed Martin's Advanced Technology Laboratories ArlingtonVA United States University of Hong Kong Hong Kong Adobe Research Google Research Katholieke Universiteit Leuven Belgium Commissariat à ĺÉnergie Atomique France IBM Research Department of Electrical Engineering and Computer Science Syracuse University United States Universidad Carlos III de Madrid Spain Microsoft Research AI SIFT LLC Universitat Politècnica de València Spain Leverhulme Centre for the Future of Intelligence United Kingdom Department of Computer Science University of Liverpool United Kingdom National University of Singapore Singapore Harvard School of Engineering and Applied Sciences in the of Fields of Multiagent Environment Design and Goal Recognition Design Amazon Alexa AI Future of Life Institute United States University of York Assuring Autonomy International Program United Kingdom University of Minnesota School of Nursing MinneapolisMN United States University of Texas at Austin AustinTX United States Institut de Robòtica i Informàtica Industrial Spanish Council for Scientific Research Technical University of Catalonia Spain Oak Ridge National Laboratory Center for Biomedical Informatics Department of Pediatrics University of Tennessee Health Science Center United States Bar Ilan University Israel University of Washington SeattleWA United States Autonomous Agents and Intelligent Robots lab of the School of Computing Informatics Decision Systems Arizona State University United States DiDi AI Labs School of Industrial and System Engineering Georgia Institute of Technology United States University of London United Kingdom Microsoft Azure

The Association for the Advancement of Artificial Intelligence 2020 Workshop Program included twenty-three workshops covering a wide range of topics in artificial intelligence. This report contains the required reports, which were submitted by most, but not all, of the workshop chairs. Copyright © 2020, Association for the Advancement of Artificial Intelligence. All rights reserved.

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Additive Manufacturing Spacecraft Structure Made of Lattice Sandwichs

Additive Manufacturing Spacecraft Structure Made of Lattice ...

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第三届中国国际复合材料科技大会

作者： Hao Zhou Xiaoyu Zhang Fuming Zeng Wenhua Shi Huizhong Zeng Yaobing Wang Beijing Key Laboratory of Intelligent Space Robotic Systems Technology and Applications Beijing Institute of Spacecraft System Engineering CAST

Lattice sandwich structures have great advantage in lightweight, multi-function and high stiffness, which provide wide application potential in spacecraft engineering. However, the report of applications of lattice sandwich structures in spacecraft mainstructure is not available due to the difficulties in the manufacturing dimensional precision and the complex connection between parts. In recent years, the development of additive manufacturing techniques, such as selective laser melting, make the high-precision lattice structures become reality. In this work, the design of the first additive manufacturing satellite structure based on lattice cells are achieved using macroscale topology optimization, microscale lattice substitution and design of connection region. The structure is manufactured with AlSi10Mg by direct metal laser melting. The dimensions of the satellite structure are 400×400×400 mm. The main structure plays the role of mechanical support of various equipments. The weight of structures made of lattice cells is much lighter than traditional structures made of solid materials or honey comb plates. The mass of the structure and its carrying capacity are 8 kg and 104 kg, respectively. The structure mass-tosatellite mass ratio is 7.7%, which is lighter than most traditional satellite made of honeycomb sandwich panels, about 15～25%. The weight reduction is extremely important for the achievement of the spacecraft system engineering. The vibration test verified that the satellite structure could endure the vibration loads resulted from the rocket launching.

关键词： Spacecraft Structure Lattice Sandwich Selective Laser Melting

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Optimization Design of Bracket and Thermal Controller Structures Based on Lattice Sandwich Cells

Optimization Design of Bracket and Thermal Controller Struct...

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第三届中国国际复合材料科技大会

作者： Xiaoyu Zhang Hao Zhou Huizhong Zeng Yaobing Wang Beijing Key Laboratory of Intelligent Space Robotic Systems Technology and Applications Beijing Institute of Spacecraft System Engineering CAST

Structures with minimum weight is highly desired by spacecraft designers. Lattice sandwich cells with advantage of lightweight, multi-function and high stiffness provide wide application potential in spacecraft engineering. For a long time, the applications of lattice sandwich structures in spacecraft are limited due to the difficulties in manufacturing technique. In the past decade, the development of additive manufacturing techniques make the high-precision lattice structures become reality. In present work, the design of the thermal controller structure based on lattice cells and the bracket structures based on lattice cells are achieved using macroscale topology optimization, microscale lattice substitution and design of connection region. All the structures are necessary in spacecraft engineering. They play the role of thermal control and mechanical support of various equipments. All the structures are manufactured with AlSi10Mg by direct metal laser melting. The weight of structures made of lattice cells is much lighter than traditional structures made of solid materials or honey comb plates. The weight reduction are extremely important for the achievement of the spacecraft system engineering. The 3D printed structure can reduce the risk of leakage of phase change materials inside thermal controller because of absence of welding joint.

关键词： Bracket Thermal Controller Lattice Sandwich

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Author Correction: Advances and prospects for the Human BioMolecular Atlas Program (HuBMAP)

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Nature cell biology 2024年第5期26卷 839页

作者： Sanjay Jain Liming Pei Jeffrey M Spraggins Michael Angelo James P Carson Nils Gehlenborg Fiona Ginty Joana P Gonçalves James S Hagood John W Hickey Neil L Kelleher Louise C Laurent Shin Lin Yiing Lin Huiping Liu Alexandra Naba Ernesto S Nakayasu Wei-Jun Qian Andrea Radtke Paul Robson Brent R Stockwell Raf Van de Plas Ioannis S Vlachos Mowei Zhou Katy Börner Michael P Snyder Department of Medicine Washington University School of Medicine St Louis MO USA. sanjayjain@wustl.edu. Department of Pediatrics Washington University School of Medicine St Louis MO USA. sanjayjain@wustl.edu. Department of Pathology and Immunology Washington University School of Medicine St. Louis MO USA. sanjayjain@wustl.edu. Center for Mitochondrial and Epigenomic Medicine Department of Pathology and Laboratory Medicine Children's Hospital of Philadelphia and Perelman School of Medicine University of Pennsylvania Philadelphia PA USA. lpei@pennmedicine.upenn.edu. Department of Cell and Developmental Biology and the Mass Spectrometry Research Center Vanderbilt University School of Medicine Nashville TN USA. jeff.spraggins@vanderbilt.edu. Department of Pathology Stanford School of Medicine Stanford CA USA. Texas Advanced Computing Center University of Texas at Austin Austin TX USA. Department of Biomedical Informatics Harvard Medical School Boston MA USA. GE Research Center Niskayuna NY USA. Department of Intelligent Systems Delft University of Technology Delft Netherlands. Department of Pediatrics (Pulmonology) and Program for Rare and Interstitial Lung Disease University of North Carolina at Chapel Hill Chapel Hill NC USA. Department of Microbiology and Immunology Stanford University Stanford CA USA. Departments of Medicine Chemistry and Molecular Biosciences Northwestern University Evanston IL USA. Department of Obstetrics Gynecology and Reproductive Sciences University of California San Diego La Jolla CA USA. Division of Cardiology University of Washington School of Medicine Seattle WA USA. Department of Surgery Washington University School of Medicine St Louis MO USA. Departments of Pharmacology Medicine (Hematology and Oncology) Lurie Cancer Center Northwestern University Feinberg School of Medicine Chicago IL USA. Department of Physiology and Biophysics University of Illinois at Chicago Chicago IL USA. Biological Sciences Division

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Enhancing squeezing and nonclassicality of light in atom-optomechanical systems

arXiv

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arXiv 2018年

作者： Guo, Yanqiang Guo, Xiaomin Li, Pu Shen, Heng Zhang, Jing Zhang, Tiancai Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education Taiyuan University of Technology Taiyuan030024 China Institute of Optoelectronic Engineering College of Physics and Optoelectronics Taiyuan University of Technology Taiyuan030024 China State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Opto-Electronics Shanxi University Taiyuan030006 China Clarendon Laboratory University of Oxford Parks Road OxfordOX1 3PU United Kingdom

Quadrature squeezing of light is investigated in a hybrid atom-optomechanical system comprising a cloud of two-level atoms and a movable mirror mediated by a single-mode cavity field. When the system is at high temperatures with quadrature fluctuations of light much above the standard quantum limit (SQL), excitation counting on the collective atomic state can effectively reduce the light noise close to the SQL. When the system is at low temperatures, considerable squeezing of light below the SQL is found at steady state. The squeezing is enhanced by simply increasing the atom-light coupling strength with the laser power optimized close to the unstable regime, and further noise reduction is achieved by decreasing various losses in the system. The presence of atoms and excitation counting on the atoms lessen the limitation of thermal noise, and the squeezing can be achieved at environment temperature of the order K. The nonclassicality of the light, embodied by the negative distributions of the Wigner function, is also studied by making non-Gaussian measurements on the atoms. It is shown that with feasible parameters excitation counting on the atoms is effective in inducing strongly optical nonclassicality. Copyright © 2018, The Authors. All rights reserved.

关键词： Atoms

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Research on knowledge network modelling for aero-craft system design 7

Research on knowledge network modelling for aero-craft syste...

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7th International Conference on Simulation and Modeling Methodologies, Technologies and Applications, SIMULTECH 2017

作者： Zhai, Xiang Dai, Feng Qu, Huiyang Zhong, Lingling Du, Chenyong Beijing Complex Product Advanced Manufacturing Engineering Research Center Beijing Simulation Center Beijing China School of Mechanical Engineering Zhejiang University Hangzhou China State Key Laboratory of Intelligent Manufacturing System Technology Beijing Institute of Electronic System Engineering Beijing China Aviation Engineering Institute Civil Aviation Flight University of China Sichuan China Beijing ZhiYuanChuangTong IT Co Ltd Beijing China

ISBN: (纸本)9789897582653

A great amount of existing knowledge is required during the development of aero-craft system. At present, the existing knowledge organization model construct different knowledge model for different stages is difficult to adapt to the complicated product life cycle application. This study proposes a product development oriented knowledge network model focusing on expressing the knowledge demands and connecting the computer-aided system. Under the overall knowledge network model, this study describes the ontology description method of spacecraft product model, development tasks and aerospace terminology. Recommending missile aerodynamic knowledge within the design stage is presented as a case study, and the framework and the method is proved to be effective. © Copyright 2017 by SCITEPRESS - Science and technology Publications, Lda. All rights reserved.

关键词： Ontology

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Investigation of plating wastewater treatment technology for chromium, nickel and copper

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IOP Conference Series: Earth and Environmental Science 2018年第1期191卷

作者： X Y Qin M R Chai D Y Ju O Hamamoto Department of Information System Graduate School Saitama Institute of Technology Fukaya Saitama Japan Advanced Science Research Laboratory Saitama Institute of Technology Fukaya Saitama Japan Ningbo Haizhi Institute of Materials Innovation Industry Jiangsu China Intelligent Production Processing System Laboratory Saitama Institute of Technology Fukaya Saitama Japan

Electroplating during chrome, nickel and copper production generates a large amount of wastewater, with plating wash water, plant wash water and equipment cooling and wash water comprising the main sources of wastewater. These wastewaters contain a variety of metal components, which causes the concentrations different. Metal ions can cause serious harm to humans, animals, plants and the environment; therefore, it is necessary to treat electroplating wastewater to remove these materials. Electroplating wastewater also contains a large number of complexes that are difficult to remove by simple precipitation. In this study, the iron reduction co-precipitation method was found to remove hexavalent chromium, decompose nickel and copper complexes and reduce chemical oxygen demand (COD) well. The average chromium-nickel-copper ion concentration was stable at 0.1 ppm, while the COD was stable between 20 and 30 ppm, enabling rapid processing by one-time treatment to meet the emission standards of China.

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Chaotic brillouin optical correlation domain analysis

arXiv

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arXiv 2017年

作者： Zhang, Jianzhong Zhang, Mingtao Zhang, Mingjiang Yi, L.I.U. Feng, Changkun Wang, Yahui Wang, Yuncai Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education and Shanxi Province Taiyuan University of Technology Taiyuan030024 China Institute of Optoelectronic Engineering College of Physics and Optoelectronics Taiyuan University of Technology Taiyuan030024 China

We propose and experimentally demonstrate a chaotic Brillouin optical correlation-domain analysis (BOCDA) system for distributed fiber sensing. The utilization of the chaotic laser with low coherent state ensures high spatial resolution. The experimental results demonstrate a 3.92-cm spatial resolution over a 906-m measurement range. The uncertainty in the measurement of the local Brillouin frequency shift is ＋ 1.2 MHz. The measurement signal-to-noise ratio is given, which is agreement with the theoretical value. © 2017 Optical Society of America Copyright © 2017, The Authors. All rights reserved.

关键词： Signal to noise ratio

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Research on Parameters of the Trailing VLF Antenna Using Lumped-Mass Method

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IOP Conference Series: Materials Science and Engineering 2018年第1期408卷

作者： Tielin Ma Zhihua Wei Haibing Chen Xiangsheng Wang Institute of Unmanned System Beihang University Beijing 100191 China Key Laboratory of Advanced Technology of Intelligent Unmanned Flight System of Ministry of Industry and Information Technology School of Aeronautic Science and Engineering Beihang University Beijing 100191 China School of Transportation Science and Engineering Beihang University Beijing 100191 China

The verticality of Very Low Frequency (VLF) antenna is an important factor to decide the radiation intensity of airborne VLF communication system, and the close relation of which with the parameters of airplane, towed antenna, and drogue is an important issue. Considering from the aspect of system design, the flight speed and the drogue's mass are primary design variables whereas the bank angle constrained by airplane's maneuverability and cable's basic parameters decided by design requirement can be chosen initially. After modelling the trailing system with lumped-mass method, sensibility analyzation about relations of the verticality of antenna with the flight speed and the drogue's mass are carried on. The result is found that when a faster flight speed is chosen, it's not easy to gain enough verticality required, and leads to a conclusion that, flight speed dominates the verticality which should be decided seriously whereas the drogue's mass poses much less effect.

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