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极端火灾天气是导致澳大利亚东南部森林大火的主要原因

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Science Bulletin 2022年第6期67卷 655-664,M0004页

作者：王斌 Allan C.Spessa 冯璞玉侯鑫岳超罗京佳 Philippe Ciais Cathy Waters Annette Cowie Rachael H.Nolan Tadas Nikonovas Huidong Jin Henry Walshaw 魏菁华郭小伟刘德立于强 State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Northwest A&F UniversityYangling 712100China New South Wales Department of Primary Industries Wagga Wagga Agricultural InstituteWagga Wagga 2650Australia Department of Geography College of ScienceSwansea UniversitySingleton ParkSwansea SA28PPUK College of Land Science and Technology China Agricultural UniversityBeijing 100193China College of Natural Resources and Environment Northwest A&F UniversityYangling 712100China Institute for Climate and Application Research(ICAR)/Key Laboratory of Meteorological Disaster of Ministry of Education(KLME) Nanjing University of Information Science and TechnologyNanjing 210044China Laboratoire des Sciences du Climat et de l'Environnement CEA-CNRS-UVSQGif sur Yvette F-91191France New South Wales Department of Primary Industries Dubbo 2830Australia New South Wales Department of Primary Industries Armidale 2351Australia School of Environmental and Rural Science University of New EnglandArmidale 2351Australia Hawkesbury Institute for the Environment Western Sydney UniversityPenrith 2751Australia CSIRO Data61 Canberra 2601Australia Python Charmers Pty ltd Hawthorn 3122Australia Key Laboratory of Adaptation and Evolution of Plateau Biota Northwest Institute of Plateau BiologyChinese Academy of SciencesXining 810008China Climate Change Research Centre University of New South WalesSydney 2052Australia College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China

2019年底至2020年初,澳大利亚东南部发生森林大火,燃烧面积达540万公顷,打破当地历史观测纪录,引发全球关注.此次火灾强度高,且多发在人类聚集区,对当地人类健康、社会经济以及生态系统造成重大影响.研究森林火灾的驱动因素并确定其对... 详细信息

2019年底至2020年初,澳大利亚东南部发生森林大火,燃烧面积达540万公顷,打破当地历史观测纪录,引发全球关注.此次火灾强度高,且多发在人类聚集区,对当地人类健康、社会经济以及生态系统造成重大影响.研究森林火灾的驱动因素并确定其对火灾程度影响的阈值,可有效帮助当地消防机构和管理部门为潜在火灾做好准备.本研究选取与火灾天气和植被生产力有关的环境要素,开发了一个基于数据驱动的机器学习诊断模型.该诊断模型对燃烧面积估测的准确性达80%以上.过去20年间,澳大利亚东南部森林火灾面积与环境要素之间呈非线性关系,且大火主要受极端火灾天气控制.由于全球变暖的影响,南极振荡和印度洋偶极子指数异常波动,导致该区域极端火灾天气频发.本研究开发的火灾面积诊断模型有助于改进澳大利亚森林火灾预警系统,并为有效防范火灾提供决策依据.

关键词：森林大火燃烧面积消防机构诊断模型环境要素机器学习观测纪录森林火灾

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未来无线网络的非正交多址接入技术（英文）

Frontiers of Information Technology & Electronic Engineering 2018年第3期19卷 322-339页

作者： Zhi-guo DING Mai XU Yan CHEN Mu-gen PENG H.Vincent POOR Department of Electrical Engineering Princeton University School of Electrical and Electronic Engineering the University of Manchester School of Electronic and Information Engineering Beihang University Huawei Technologies Co. Ltd. Institute of Telecommunications Beijing University of Posts and Telecommunications

本文就新兴通信技术——非正交多址接入(non-orthogonal multiple access,NOMA)——对未来无线网络的影响进行了全面综述。具体地,介绍了NOMA原理对下一代多址接入技术设计的影响。讨论了NOMA在其他先进通信技术上的应用,包括无线缓存... 详细信息

本文就新兴通信技术——非正交多址接入(non-orthogonal multiple access,NOMA)——对未来无线网络的影响进行了全面综述。具体地,介绍了NOMA原理对下一代多址接入技术设计的影响。讨论了NOMA在其他先进通信技术上的应用,包括无线缓存、多入多出技术、毫米波通信以及协同中继。阐述了NOMA对蜂窝网络之外通信系统的影响,例如数字电视、卫星通信、车联网及可见光通信。最后,讨论并总结了NOMA的主要研究挑战及未来发展方向。

关键词：非正交多址多天线技术毫米波混合多址无线缓存协作非正交多址可见光通信

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固体氧化物燃料电池电解质材料的研究进展

功能材料 2021年第6期52卷 6076-6083,6089页

作者：尚凤杰李沁兰石永敬刘海定 Shigeng Song 重庆科技学院冶金与材料工程学院重庆401331 重庆材料研究院有限公司重庆401331 Institute of Thin Films Sensors and Imaging School of Engineering and Computing University of the West of Scotland Paisley PA1 2BE UK

固体氧化物燃料电池(SOFC)是一种能量转换效率高、环境友好和燃料灵活的全固态发电设备,为能源资源的可持续发展提供选择。氧离子在固体电解质中是通过氧空位传导的,即增大氧空位浓度是提高离子电导率的关键,而高离子电导率的电解质材... 详细信息

固体氧化物燃料电池(SOFC)是一种能量转换效率高、环境友好和燃料灵活的全固态发电设备,为能源资源的可持续发展提供选择。氧离子在固体电解质中是通过氧空位传导的,即增大氧空位浓度是提高离子电导率的关键,而高离子电导率的电解质材料促进了SOFC发展。综述了固体电解质的离子传输机制和ZrO_(2)基电解质、CeO_(2)基电解质、Bi_(2)O_(3)基电解质和LaGaO_(3)基电解质材料的结构、研究进展以及优缺点,并对未来电解质材料的研究发展趋势进行了展望。

关键词：固体氧化物燃料电池电解质材料离子传输

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固体氧化物燃料电池阴极材料的研究进展

功能材料 2021年第7期52卷 7032-7040页

阴极材料是固体氧化物燃料电池的重要组成。提高阴极材料的电子/离子电导率、降低极化电阻是使SOFC低温化运行、延长电池使用寿命的重要方法。阴极材料的高电子电导性促使钙钛矿结构氧化物在阴极材料的研究领域占据主导地位。综述了钙... 详细信息

阴极材料是固体氧化物燃料电池的重要组成。提高阴极材料的电子/离子电导率、降低极化电阻是使SOFC低温化运行、延长电池使用寿命的重要方法。阴极材料的高电子电导性促使钙钛矿结构氧化物在阴极材料的研究领域占据主导地位。综述了钙钛矿结构阴极、尖晶石结构阴极和Ruddlesden-popper型结构阴极材料的研究进展,并展望了未来阴极材料的发展方向。

关键词：固体氧化物燃料电池阴极材料钙钛矿氧化物研究进展

MODELING AND GRINDING METHOD OF INDEXABLE INSERTS

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MODELING AND GRINDING METHOD OF INDEXABLE INSERTS

电梯企业三大核心业务和它们之间的关系——金融危机爆发时的英国电梯行业情况和我的预测

The 2011 International Conference on Mechanical Engineering and Technology

作者： Fei Li Bin Yao Zheshan Zhang Boshi Yao Department of Mechanical and Electrical Engineering Xiamen University Shaan Xi Hanjiang Machine Tool co.ltd

In order to guarantee consistency of workpiece manufactured, grinding the transition surface is an important issue for manufacturing indxable insert. In this study, the paper analyzed systematically indexable insert for cutting tools designation（ISO 1832 2004）, and made use of parametric design method to analyze the geometric features of indexable insert. What is more, on the basis of grinding principles and the point vector method, the mathematic models of typical transition surfaces of inserts insert with wiper and chamfer, and insert with nose radius were established. The mathematic models derived are most important part in writing the software which is used to generate automatically programs for manufacturing indexable *** idea was that using small planes describe the transition surface of insert, and then a general relationship between those planes and workpiece coordinate system could be established based on the point vector method. Finally, the simulation examples were done by CAD/CAM to check the correctness of the models. The method presented could be extended to study more complicated transition surface of insert.

关键词： Indexable insert Grinding Transition surface

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中国电梯 2015年第10期26卷 50-52页

作者：梁弘谅 Movvéo Lift Consultants ltd

欧洲的金融危机爆发于2008年年底，那时整个英国可以说是风声鹤唳，各个行业一片萧条，企业雇员为了保住工作职位而忧心忡忡。

关键词：电梯行业金融危机电梯企业核心业务英国爆发预测

How psychiatrists coordinate treatment for COVID-19: a retrospective study and experience from China

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General Psychiatry 2020年第4期33卷 174-178页

作者： Ling Yue Jingyi Wang Mingliang Ju Yi Zhu Lianghu Chen Lin Shi Bohai Shi Jun Chen Yifeng Shen Department of Psychiatry Shanghai Jiao Tong University School of MedicineAffiliated Shanghai Mental Health CenterShanghaiChina Department of Social Medicine School of Public HealthFudan UniversityShanghaiChina Department of Population Science and Experimental Medicine University College LondonLondonUK Department of Psychiatry Nanhui Mental Health Center of Pudong New AreaShanghaiChina Department of General Adult Psychiatry Xuhui District Mental Health CenterShanghaiChina Department of Psychiatry Hongkou District Mental Health CenterShanghaiChina

Background Patients with C0VID-19 are at high risk of developing mental health problems;however,the prevalence and management of mental disorders and how psychiatrists coordinate the treatment are *** We aimed to investigate the mental health problems of patients infected with C0VID-19 and to identify the role of psychiatrists in the clinical treatment team during the *** also share the experience of psychiatric consultations of patients with COVID-19 in Shanghai,*** We analysed data from the psychiatric medical records of 329 patients with COVID-19 in the Shanghai Public Health Clinical Center from 20 January to 8 March *** collected information including sociodemographic characteristics,whether patients received psychiatric consultation,mental health symptoms,psychiatric diagnoses,psychiatric treatments and severity level of *** Psychiatric consultations were received by 84(25.5%)patients with *** most common symptoms of mental health problems were sleep disorders(75%),anxiety(58.3%)and depressive symptoms(11.9%).The psychiatric consultation rate was highest in critically ill patients(69.2%),with affective symptoms or disturbed behaviour as their main mental health *** diagnoses for patients who received consultation included acute stress reaction(39.3%),sleep disorders(33.3%),anxiety(15.5%),depression(7.1%)and delirium(4.8%).In terms of psychiatric treatments,86.9%of patients who received psychiatric consultation were treated with psychotropic medications,including non-benzodiazepine sedative-hypnotic agents(54.8%),antidepressants(26.2%),benzodiazepines(22.6%)and antipsychotics(10.7%).Among the 76 patients who were discharged from the hospital,79%had recovered from mental health problems and were not prescribed any psychotropic *** symptoms of the remaining 21%of patients had improved and they were prescribed medications to continue the *** This is the first study

关键词： treatment coordinate prescribed

Identifying the Factors for Ensuring Customers Actively Engaged in Smart Grids

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Journal of Energy and Power Engineering 2015年第1期9卷 68-77页

作者： Linda Hull Even BjФrnstad Yvonne Boerakker Magnus Brolin Yeoungjin Chae Duncan Yellen Strategic Asset Management EA Technology Ltd. Chester CH16ES UK Enova SF Oil and Energy Trondheim N-7030 Norway Policy Advisory and Research DNV GL Arnhem 6800 Netherlands Energy Technology Department SP Technical Research Institute of Sweden Goteborg 400 22 Sweden Planning Division KPX Bitgaramro 625 Korea Smart Grid Delivery EA Technology Ltd. Chester CH1 6ES UK

Smart grids are expected to become an essential component of the future energy system. The technical potential of smart grids is far reaching and increasingly well understood, and smart grids are now in the early phases of market deployment in several regions, particularly, in Europe and the US. Less understood than the technical aspects is how and to what degree end users (i. e. the customers) are willing and able to embrace smart grid technologies and the changes in mindset associated with this transition. This article reports the main findings from an IEA (International Energy Agency)-DSM (demand side management) project addressing the role of customers in a smart grid deployment scheme, specifically how customer behavior may restrict the technical potential of smart grids from being realized. With a model of household energy behavior as the theoretical point of departure, the research builds on experiences from various smart grid pilot studies, together with consumer research within similar domains, to identify behavioral challenges that are likely to hamper adoption of "smart grid behaviors". Based on this insight, a set of recommendations to minimize customer resistance to smart grid deployment is suggested.

关键词：电网技术客户行为智能国际能源机构能源系统需求侧管理组成部分早期阶段

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提高电位器分辨力的运算放大器

电子设计技术 2001年第2期8卷 68-68页

作者： Chuck Wojslow CA Elab ltd Stoke-on-Trent uk Xicor Inc Milpitas and P Gareth Lloyd

数控电位器（DCP）的关键参数是抽头个数n,即电刷的可编程位置的个数。在可编程的电流和电压应用中,此参数确定电位器的分辨力。现有多种电路方法,它们只用一个或多个具有额定抽头数的数字控制电位器,就可提高电位器的分辨力。图1所示... 详细信息

数控电位器（DCP）的关键参数是抽头个数n,即电刷的可编程位置的个数。在可编程的电流和电压应用中,此参数确定电位器的分辨力。现有多种电路方法,它们只用一个或多个具有额定抽头数的数字控制电位器,就可提高电位器的分辨力。图1所示电路对提高可编程电压应用场合的分辨力,在理论上是没有限制的。IC;放大器电路是一个具有加权输入

关键词：分辨力可编程抽头电位器电器加法电路