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Fully Copper‐Exchanged High‐Silica LTA Zeolites as Unrivaled Hydrothermally Stable NH3‐SCR Catalysts

Angewandte Chemie 2017年第12期129卷

作者： Taekyung Ryu Nak Ho Ahn Seungwan Seo Jung Cho Hyojun Kim Donghui Jo Gi Tae Park Pyung Soon Kim Chang Hwan Kim Elliott L. Bruce Paul A. Wright In‐Sik Nam Suk Bong Hong Center for Ordered Nanoporous Materials Synthesis Division of Environmental Science and Engineering POSTECH Pohang 37673 Korea Advanced Catalysts and Emission-Control Research Lab Research & Development Division Hyundai Motor Group Hwaseong Gyeonggi 18280 Korea EaStCHEM School of Chemistry University of St. Andrews St. Andrews KY16 9ST UK

Diesel engine technology is still the most effective solution to meet tighter CO 2 regulations in the mobility and transport sector. In implementation of fuel‐efficient diesel engines, the poor thermal durability of lean nitrogen oxides (NO x ) aftertreatment systems remains as one major technical hurdle. Divalent copper ions when fully exchanged into high‐silica LTA zeolites are demonstrated to exhibit excellent activity maintenance for NO x reduction with NH 3 under vehicle simulated conditions even after hydrothermal aging at 900 °C, a critical temperature that the current commercial Cu‐SSZ‐13 catalyst cannot overcome owing to thermal deactivation. Detailed structural characterizations confirm the presence of Cu 2+ ions only at the center of single 6‐rings that act not only as a catalytically active center, but also as a dealumination suppressor. The overall results render the copper‐exchanged LTA zeolite attractive as a viable substitute for Cu‐SSZ‐13.

关键词： Cu-LTA Heterogene Katalyse Hydrothermalbedingungen Selektive katalytische Reduktion Zeolithe

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Author Correction: A multi-country test of brief reappraisal interventions on emotions during the COVID-19 pandemic

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Nature human behaviour 2022年第9期6卷 1318-1319页

作者： Ke Wang Amit Goldenberg Charles A Dorison Jeremy K Miller Andero Uusberg Jennifer S Lerner James J Gross Bamikole Bamikole Agesin Márcia Bernardo Olatz Campos Luis Eudave Karolina Grzech Daphna Hausman Ozery Emily A Jackson Elkin Oswaldo Luis Garcia Shira Meir Drexler Anita Penić Jurković Kafeel Rana John Paul Wilson Maria Antoniadi Kermeka Desai Zoi Gialitaki Elizaveta Kushnir Khaoula Nadif Olalla Niño Bravo Rafia Nauman Marlies Oosterlinck Myrto Pantazi Natalia Pilecka Anna Szabelska I M M van Steenkiste Katarzyna Filip Andreea Ioana Bozdoc Gabriela Mariana Marcu Elena Agadullina Matúš Adamkovič Marta Roczniewska Cecilia Reyna Angelos P Kassianos Minja Westerlund Lina Ahlgren Sara Pöntinen Gabriel Agboola Adetula Pinar Dursun Azuka Ikechukwu Arinze Nwadiogo Chisom Arinze Chisom Esther Ogbonnaya Izuchukwu L G Ndukaihe Ilker Dalgar Handan Akkas Paulo Manuel Macapagal Savannah Lewis Irem Metin-Orta Francesco Foroni Megan Willis Anabela Caetano Santos Aviv Mokady Niv Reggev Merve A Kurfali Martin R Vasilev Nora L Nock Michal Parzuchowski Mauricio F Espinoza Barría Marek Vranka Markéta Braun Kohlová Ivan Ropovik Mikayel Harutyunyan Chunhui Wang Elvin Yao Maja Becker Efisio Manunta Gwenael Kaminski Jordane Boudesseul Dafne Marko Kortnee Evans David M G Lewis Andrej Findor Anais Thibault Landry John Jamir Benzon Aruta Manuel S Ortiz Zahir Vally Ekaterina Pronizius Martin Voracek Claus Lamm Maurice Grinberg Ranran Li Jaroslava Varella Valentova Giovanna Mioni Nicola Cellini Sau-Chin Chen Janis Zickfeld Karis Moon Habiba Azab Neil Levy Alper Karababa Jennifer L Beaudry Leanne Boucher W Matthew Collins Anna Louise Todsen Kevin van Schie Jáchym Vintr Jozef Bavolar Lada Kaliska Valerija Križanić Lara Samojlenko Razieh Pourafshari Sandra J Geiger Julia Beitner Lara Warmelink Robert M Ross Ian D Stephen Thomas J Hostler Soufian Azouaghe Randy McCarthy Anna Szala Caterina Grano Claudio Singh Solorzano Gulnaz Anjum William Jimenez-Leal Maria Bradford Laura Calderón Pérez Julio E Cruz Vásquez Oscar J Galindo-Caballero Juan Cami Harvard Kennedy School Harvard University Cambridge MA USA. Harvard Business School Harvard University Cambridge MA USA. Kellogg School of Management Northwestern University Evanston IL USA. Department of Psychology Willamette University Salem OR USA. millerj@willamette.edu. Institute of Psychology University of Tartu Tartu Estonia. Harvard Kennedy School and Department of Psychology Harvard University Cambridge MA USA. Department of Psychology Stanford University Stanford CA USA. Adekunle Ajasin University Akungba Akoko Nigeria. Faculdade de Psicologia e Ciências da Educação Universidade do Porto Porto Portugal. University of Deusto Barakaldo Spain. University of Navarra Pamplona Spain. University of Valencia Valencia Spain. Stockholm University Stockholm Sweden. California State University Northridge Los Angeles CA USA. Indiana University of Pennsylvania Indiana PA USA. Universidad de Navarra Pamplona Spain. Department of Cognitive Psychology Institute of Cognitive Neuroscience Ruhr University Bochum Bochum Germany. Kindergarten Kustošija Zagreb Croatia. GC University Lahore Lahore Pakistan. Montclair State University Jersey City NJ USA. European University of Cyprus Nicosia Cyprus. Indiana University of Pennsylvania Akron PA USA. Leiden University Culemborg The Netherlands. Stockholm Sweden. Poggio Imperiale Italy. Barakaldo Spain. Islamabad Pakistan. Gent Belgium. Oxford Internet Institute University of Oxford Oxford UK. Warsaw Poland. Queen's University Belfast Belfast Ireland. Universiteit Leiden Leiden The Netherlands. Institute of Psychology Jagiellonian University Krakow Poland. Department of Psychology Lucian Blaga University of Sibiu Sibiu Romania. Carol Davila University of Medicine and Pharmacy Bucharest Romania. National Research University Higher School of Economics Moscow Russia. Institute of Psychology Faculty of Arts University of Presov Presov Slovakia. Institute of Social Sciences CSPS Sl

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development of highly active coated monolith SCR catalyst with strong abrasion resistance for low-temperature application

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Frontiers of Environmental Science & Engineering 2015年第6期9卷 979-987页

作者： Lina GAN Shan LEI Jian YU Hongtao MA Yo YAMAMOTO Yoshizo SUZUKI Guangwen XU Zhanguo ZHANG State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China University of Chinese Academy of Sciences Beijing 100049 China Materials Research Department Materials Research Laboratories Research and Development Group Meidensha Corporation 8-1 Osaki 2-Chome Shinagawa-ku Tokyo 141-8565 Japan National Institute of Advanced Industrial Science and Technology (AIST) Onogawa 16-1 Tsukuba 305-8569 Japan

Monolith SCR catalysts coated with V2Os- WO3/TiO2 were prepared by varying binder and coating thickness. Comparing with a monolith extruded with 100% V2O5-WO3/TiO2 powder, a coated monolith with a catalyst-coating layer of 260 μm in thickness exhibited the similar initial NOx reduction activity at 250℃. After 4 h abrasion （attrition） in an air stream containing 300 g. m^-3 fine sands （50-100μm） at a superficial gas velocity of 10m·s^-1, the catalyst still has the activity as a 100% molded monolith does in a 24-h activity test and it retains about 92% of its initial activity at 250℃. Estimation of the equivalent durable hours at a fly ash concentration of 1.0 g.m^-3 in flue gas and a gas velocity of 5 m.s^-1 demonstrated that this coated monolith catalyst is capable of resisting abrasion for 13 months without losing more than 8% of its initial activity. The result suggests the great potential of the coated monolith for application to de-NOx of flue gases with low fly ash concentrations from, such as glass and ceramics manufacturing processes.

关键词： coated monolith low-temperature denitration,abrasion resistance attrition

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Investigation of the trigger voltage walk-in effect in LDMOS for high-voltage ESD protection

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Journal of Semiconductors 2014年第9期35卷 56-59页

作者：梁海莲董树荣顾晓峰钟雷吴健于宗光 Key Laboratory of Advanced Process Control for Light Industry (Ministry of Education) Department of Electronic Engineering Jiangnan University ESD Laboratory Department of Information Science and Electronic Engineering Zhejiang University China Electronic Technology Group Corporation No.58 Research Institute

The trigger voltage walkin effect has been investigated by designing two different laterally diffused metal-oxide-semiconductor （LDMOS） transistors with an embedded silicon controlled rectifier （SCR）. By inserting a P＋ implant region along the outer and the inner boundary of the N＋ region at the drain side of a conventional LDMOS transistor, we fabricate the LDMOS-SCR and the SCR-LDMOS devices with a different triggering order in a 0.5/zm bipolar-CMOS-DMOS process, respectively. First, we perform transmission line pulse （TLP） and DC-voltage degradation tests on the LDMOS-SCR. Results show that the trigger voltage walk-in effect can be attributed to the gate oxide trap generation and charge trapping. Then, we perform TLP tests on the SCR-LDMOS. Results indicate that the trigger voltage walk-in effect is remarkably reduced. In the SCR-LDMOS, the embedded SCR is triggered earlier than the LDMOS, and the ESD current is mainly discharged by the parasitic SCR structure. The electric potential between the drain and the gate decreases significantly after snapback, leading to decreased impact ionization rates and thus reduced trap generation and charge trapping. Finally, the above explanation of the different trigger voltage walk-in behavior in LDMOS-SCR and SCR-LDMOS devices is confirmed by TCAD simulation.

关键词： electrostatic discharge laterally diffused metal-oxide-semiconductor silicon control rectifier triggervoltage walk-in effect

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Flight testing a real-time hazard detection system for safe lunar landing on the rocket-powered morpheus vehicle

Flight testing a real-time hazard detection system for safe ...

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AIAA Guidance, Navigation, and control Conference 2015, MGNC 2015 - Held at the AIAA SciTech Forum 2015

作者： Trawny, Nikolas Huertas, Andres Luna, Michael E. Villalpando, Carlos Y. Martin, Keith E. Carson, John M. Johnson, Andrew E. Restrepo, Carolina Roback, Vincent E. GN&C Hardware and Testbed Development Group Jet Propulsion Laboratory California Institute of Technology PasadenaCA91109 United States Maritime & Aerial Perception Systems Group Jet Propulsion Laboratory California Institute of Technology PasadenaCA91109 United States Guidance & Control Operations Group Jet Propulsion Laboratory California Institute of Technology PasadenaCA91109 United States Advanced Computer Systems & Technologies Group Jet Propulsion Laboratory California Institute of Technology PasadenaCA91109 United States Simulation & Support Equipment Group Jet Propulsion Laboratory California Institute of Technology PasadenaCA91109 United States Jet Propulsion Laboratory California Institute of Technology PasadenaCA91109 United States Integrated GN&C Analysis Branch NASA Johnson Space Center HoustonTX77058 United States Remote Sensing Flight Systems Branch NASA Langley Research Center HamptonVA23681 United States

ISBN: (纸本)9781510801097

The Hazard Detection System (HDS) is a component of the ALHAT (Autonomous Landing and Hazard Avoidance Technology) sensor suite, which together provide a lander Guidance, Navigation and control (GN&C) system with the relevant measurements necessary to enable safe precision landing under any lighting conditions. The HDS consists of a stand-alone compute element (CE), an Inertial Measurement Unit (IMU), and a gimbaled ash LIDAR sensor that are used, in real-time, to generate a Digital Elevation Map (DEM) of the landing terrain, detect candidate safe landing sites for the vehicle through Hazard Detection (HD), and generate hazard-relative navigation (HRN) measurements used for safe precision landing. Following an extensive ground and helicopter test campaign, ALHAT was integrated onto the Morpheus rocket-powered terrestrial test vehicle in March 2014. Morpheus and ALHAT then performed five successful free flights at the simulated lunar hazard field constructed at the Shuttle Landing Facility (SLF) at Kennedy Space Center, for the first time testing the full system on a lunar-like approach geometry in a relevant dynamic environment. During these flights, the HDS successfully generated DEMs, correctly identified safe landing sites and provided HRN measurements to the vehicle, marking the first autonomous landing of a NASA rocket-powered vehicle in hazardous terrain. This paper provides a brief overview of the HDS architecture and describes its in-flight performance. © 2015, E-flow American Institute of Aeronautics and Astronautics (AIAA). All rights reserved.

关键词： Hazards

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GaN-based p–i–n ultraviolet photodetectors with a thin p-type GaN layer on patterned sapphire substrates

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Chinese Optics Letters 2014年第9期12卷 66-69页

作者：黄红娟闫大为王国胜谢峰杨国锋肖少庆顾晓峰 Key Laboratory of Advanced Process Control for Light Industry (Ministry of Education) Department of Electronic Engineering Jiangnan University The 38th Research Institute of China Electronics Technology Group Corporation

We study the performance of GaN-based p i n ultraviolet （UV） photodetectors （PDs） with a 60 nm thin ptype contact layer grown on patterned sapphire substrate （PSS）. The PDs on PSS exhibit a low dark current of -2 pA under a bias of -5 V, a large UV/visible rejection ratio of-7× 10^3, and a high-quantum efficiency of -40% at 365 nm under zero bias. The average quantum efficiency of the PDs still remains above 20% in the deep-UV region from 280 to 360 nm. In addition, the noise characteristics of the PDs are also discussed, and the corresponding specific detectivities limited by the thermal noise and the low-frequency 1/f noise are calculated.

关键词： Gallium alloys Gallium nitride Photodetectors Photons Sapphire Substrates

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26th Annual Computational Neuroscience Meeting (CNS*2017) of the Organization for Computational Neuroscience Antwerp, Belgium, July 15-20, 2017

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BMC NEUROSCIENCE 2017年第SUPPL 1期18卷 59-59页

作者： [Anonymous] Indiana University Purdue University Indianapolis Indianapolis IN 46032 USA Stark Neurosciences Research Institute Indiana University School of Medicine Indianapolis IN 46032 USA Department of Mathematics East Carolina University Greenville NC 27858 USA Jülich Supercomputing Centre Forschungszentrum Jülich 52425 Jülich Germany Future Systems Swiss National Supercomputing Centre 8092 Zurich Switzerland User Engagement and Support Swiss National Supercomputing Centre 6900 Lugano Switzerland Institut de Neurosciences des Systèmes Aix Marseille Univ 13005 Marseille France Simulation Lab Neuroscience Forschungszentrum Jülich Jülich Germany Department of Experimental Psychology Ghent University 9000 Ghent Belgium Donders Center for Cognitive Neuroimaging Radboud University 6525HR Nijmegen The Netherlands Department of Electrical Computer and Energy Engineering University of Colorado Boulder CO 80309 USA Department of Neurosurgery Johns Hopkins School of Medicine Baltimore MD 21287 USA Department of Neurology Johns Hopkins School of Medicine Baltimore MD 21287 USA Department of Otolaryngology Johns Hopkins School of Medicine Baltimore MD 21287 USA INSERM U968 Paris France Sorbonne Universités UPMC University Paris 06 UMR_S 968 Institut de la Vision Paris France CNRS UMR_7210 Paris France Department of Computer Architecture and Technology University of Granada (CITIC) Granada Spain Sorbonne Universités UPMC Univ Paris 06 INSERM CNRS Institut de la Vision Paris France Department of Adaptive Machine Systems Osaka University Osaka Japan Department of Computer Science University of Cergy-Pontoise Cergy-Pontoise France Department of Physics and Astronomy College of Charleston Charleston SC 29424 USA School of Physics Faculty of Science University of Sydney Sydney NSW 2006 Australia Center of Excellence for Integrative Brain Function Australian Research Council Sydney Australia Max Planck Institute for Human Cognitive and Brain Sciences Saxony Lei

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Small-angle neutron scattering as a probe to decide the maximum limit of chemical waste immobilization in a cement matrix

Small-angle neutron scattering as a probe to decide the maxi...

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作者： Das, A. Mazumder, S. Sen, D. Yalmali, V. Shah, J.G. Ghosh, A. Sahu, A.K. Wattal, P.K. Solid State Physics Division Bhabha Atomic Research Centre Mumbai 400 085 India Process Development Division Bhabha Atomic Research Centre Mumbai 400 085 India Glass and Advanced Materials Division Bhabha Atomic Research Centre Mumbai 400 085 India Nuclear Recycle Group Bhabha Atomic Research Centre Mumbai 400 085 India

Immobilization of low- and intermediate-level radioactive waste in a cement matrix is an important process in any nuclear industry. In this regard, setting the maximum limit of waste loading in cement is a crucial issue and one that significantly depends on the mesoscopic density fluctuations of the composite cement matrix. Small-angle neutron scattering (SANS), a technique that maps coherent neutron scattering length density fluctuation, is efficient in monitoring the degree of homogeneity of a condensed matrix. It is prudent, then, to use SANS to probe the degree of homogenization in a composite cement matrix upon immobilization of low-level non-heat-generating radioactive waste. In the present work, the effects of loading of simulated cerium waste on the mesoscopic structure of hydrated cement have been investigated by SANS complemented by scanning electron microscopy and mercury intrusion porosimetry. Utilizing the multiple-scattering phenomenon, the scattering mean free path has been estimated, which has a direct relevance to the degree of homogenization of the waste-loaded cement matrix as far as the neutron scattering length density is concerned. It has been revealed that the structure of hydrated cement becomes less consolidated because the mass fractal dimension decreases with an increase in waste loading. Scattering data unveil the existence of pores at two widely separated length scales. The size of the larger pores increases with loading beyond a certain concentration. However, no significant modification has been observed for the pores on the smaller length scale. © 2014 International Union of Crystallography.

关键词： Neutron scattering

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Design of a BACnet-ZigBee gateway for Smart Grid in buildings

Design of a BACnet-ZigBee gateway for Smart Grid in building...

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2013 IEEE Conference Anthology, ANTHOLOGY 2013

作者： Kim, Gi Myung Kim, Se Hwan Hong, Seung Ho Lee, Jin Department of Electrical Control and Instrumentation Engineering Hanyang University Ansan Korea Republic of Head of Advanced Technology RandD Center Research and Development Group LS Industrial Systems Co. Ltd. Anyang Korea Republic of

ISBN: (纸本)9781479916603

Smart Grid (SG) is a modernized and a future-oriented electric grid that deals with the whole energy chain from generation to consumer. Among SG applications, demand response (DR) is an important control mechanism to manage the electricity consumption of the customer in response to the supply condition. In buildings, DR is managed through communication networks installed in the buildings. These communication protocols must include DR-supporting applications. BACnet (Building automation and control network) [3] is an international standard communication protocol for building automation and control systems (BACS). BACnet uses ZigBee as a wireless communication protocol for BACS. Both BACnet and ZigBee have their own DR applications. In this study, we developed a BACnet-ZigBee gateway that maps the DR application of BACnet to that of ZigBee. The function of the BACnet-ZigBee gateway was verified through experiment. © 2013 IEEE.

关键词： Zigbee

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Generalized predictive control of pH neutralization process based on fuzzy inverse model

Generalized predictive control of pH neutralization process ...

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Iranian Conference on Fuzzy Systems (IFSC)

作者： Davood Shaghaghi Hossein MonirVaghefi Alireza Fatehi Advanced Process Automation & Control (APAC) Research Group K. N. Toosi University of Technology Tehran Iran

control of pH neutralization process has always been one of challenging problem in process control. The method presented here to control this process is the fuzzy identification of systems using Wiener model, and then multiplying the measured signal by the inverse of the nonlinear part of model. Therefore, we can design a linear controller for this new augmented system. This strategy is implemented in a generalized predictive control. One of the advantages of this control structure is consideration of explicit constraint in control of systems which also included in proposed fuzzy predictive control. At the end, the proposed method is tested on the model of a pH neutralization process.

关键词： Predictive control Predictive models Adaptation models Fuzzy systems Cost function Nonlinear dynamical systems

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