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15篇 您的检索式:作者名="R.Michael"
    题名 作者 年代 出处 被引量
1一种通信干扰分类方法显示文摘随着软件无线电技术在无线网络领域内的应用越来越广,传统的电子战干扰与新兴的无线网络赛博攻击之间的界线更加模糊。为了精确描述快速发展的无线安全领域内的这些新兴概念,文章提出了一种干扰机分类方法,以便对通信干扰机的理论行为和特点进行分类。与传统上根据干扰机所能干扰的信号类型进行分类相比,文章提出根据干扰机所拥有的信息及其利用信息的能力来分类。这些关键的干扰机能力包括干扰机是否具备时间相关性、协议感知能力、欺骗能力、学习能力。这些能力又可根据干扰机特性进行二级细分,包括干扰机的各种参数,如相对带宽、占空因数、调制方式、天线方向图以及该天线方向是否可控。最后,对当前相关文献中提出的干扰方法进行了抽样研究,并讨论如何将其归入本文提出的分类体系中。marc lichtman jeffrey d.poston sai dhiraj amuru chowdhury shahriar t.charles clancy r.michael buehrer jeffrey h.reed 张春磊(翻译) 陈鼎鼎(审校) 2016通信对抗2016,35,1:3
2Mechanism for the differential toxicity of neonicotinoid insecticides in the honey bee, Apis mellifera显示文摘Takao Iwasa Naoki Motoyama John T. Ambrose R.Michael Roe 2003Crop Protection2003,,5:1
3The juvenile hormones: historical facts and speculations on future research directions显示文摘Lawrence I Gilbert Noelle A. Granger R.Michael Roe 2000Insect Biochemistry and Molecular Biology2000,,8:1
4Clinical importance of changes in chronic pain intensity measured on an 11-point numerical pain rating scale显示文摘John T Farrar James P Young Linda LaMoreaux John L Werth R.Michael Poole 2001Pain2001,,2:1
5Controversial topics in shoulder arthroscopy显示文摘Charles Ruotolo Wesley M. Nottage Evan L. Flatow R.Michael Gross Gary S. Fanton 2002Arthroscopy: The Journal of Arthroscopic and Related Surgery2002,,2:1
6Crystal Structure of the SF3 Helicase from Adeno-Associated Virus Type 2显示文摘J.Anson James Carlos R. Escalante Miran Yoon-Robarts Thomas A. Edwards R.Michael Linden Aneel K. Aggarwal 2003Structure2003,,:1
7Clinical importance of changes in chronic pain intensity measured on an 11-point numerical pain rating scale显示文摘John T Farrar James P Young Linda LaMoreaux John L Werth R.Michael Poole 2001Pain2001,,2:1
8基于因子图迭代接收的改进调制样式识别方法显示文摘讨论两个已得到重点研究的主题:调制样式识别和迭代接收机设计。文章将这两个主题融合于因子图架构中。因子图架构能够用一种统一的方法来表征一系列算法,尤其是迭代算法。特别地,文章描述了一种因子图,该因子图将调制样式识别融合于迭代接收机结构中。所提的迭代接收机通过因子图上的消息传递过程,寻找一条将调制样式识别、解调和译码结合在一起的最佳途径。进而构建了一个识别器,该识别器利用从译码器得到的反馈信息作为编码比特的一个先验概率。仿真结果证明所提的接收机相比于将调制样式识别跟解调译码分离实现的最大似然识别器在性能上有重大提高。Daniel Jakubisin R.Michael Buehrer 朱佳伟 2014通信对抗2014,33,1:0
9微积分:一种从简单代数开始的学校新方法显示文摘对于切线和导数,我们概述一种不使用任何极限的新方法.代之以的是,它利用与二次方程相关的初等代数概念,因此适合进入学校课程,对核心的代数因式分解添加一个初等估计自然导致连续性的概念,从而揭示代数导数也可以通过逼近过程获得原来这对于处理例如指数函数这样的非代数函数至关重要.为了捕捉新的难以捉摸的极限,学生认识到需要把熟悉的有理数扩展到更奇妙的实数.对于指数函数的切线问题的解以代数方式自然推广的一种阐叙方法导致可微函数的一般概念,这已具有70多年的历史.这种方法从最初等的概念到分析学的核心逐渐进行,一路上让学生清楚为什么需要更复杂的工具,并为更高级的概念提供动力,这对于正确理解微积分是必不可少的。R.Michael Range 陆柱家(译) 里欣(校) 2022数学译林2022,41,4:0
10第2章 大气观测系统100年进步显示文摘虽然在美国气象学会于1919年成立之前,大气观测系统已经是气象的重要组成部分,过去的100年里,无论是观测的数量还是种类都获得了稳定增加。本文给出了观测系统研发的案例,诠释这些系统如何促成了科学发现。这些案例包括了与边界层、高空、云和降水以及太阳和地球辐射相关的观测系统。对应用广泛的特殊观测系统,例如雷达、光达和研究用飞机等进行了讨论,并给出在天气和气候预报中应用的个例。这些个例中还包含了臭氧和二氧化碳等特殊的化学观测。观测系统的信息源,包括本文集其他章节涉及内容,也进行了讨论。过去100年大气观测系统的特征,是社会对天气观测的需求与大气过程基本气象研究需求之间的协同。在后半程里,观测系统的改进得到数值模式对更高分辨率数据、长期观测和更好的全球覆盖等不断增长需求的推进。这也带来数据获取和获得来自不断增加的各种观测系统类型和观测网的融合数据的需求,这样的趋势或将持续。杰弗里·斯蒂斯 DARREL BAUMGARDNER JULIE HAGGERTY R.MICHAEL HARDESTY WEN-CHAU LEE DONALD LENSCHOW PETER PILEWSKIE PAUL L.SMITH MATTHIAS STEINER HOLGER V?MEL 贾朋群 李婧华 2019气象科技进展2019,9,S01:0
11Identification of a decedent in a 103-year-old homicide case using forensic anthropology and genetic genealogy显示文摘Anthropologists are often the custodians of long-term unidentified human remains though their positions as curators of university or museum skeletal collections.Various factors decrease the solvability of these legacy cases including the passage of time,the loss of provenience for specific cases,and lack of documentation or case records.While anthropologists can contribute important information toward identification,it is often necessary to explore novel and cross-disciplinary strategies to resolve difficult cold cases.In long cold cases,the postmortem interval,in particular,may be difficult to estimate leading to further challenges in achieving identification.Modern advances in radiocarbon bomb pulse dating,isotope analysis,and actualistic studies have contributed to positive identification of unidentified human remains in some legacy cases,but may not be available to all forensic practitioners and law enforcement from resource-poor agencies.Pooling resources,as well as collaborating with professionals outside of forensic anthropology,is a useful strategy to pursue when anthropological methods are exhausted.The case study presented here demonstrates a collaborative approach between forensic anthropologists,forensic genetic genealogists,and law enforcement in a century-old homicide.The dismembered and mummified parts of a male body were recovered in a remote cave in 1979 and again in 1991.Despite forensic anthropologists creating and updating the biological profile over the decades from recovery to present,no identification was made until the application of forensic genetic genealogy(FGG)to the case in 2019.New interpretations of bone microstructure and trauma analysis are presented for the case,alongside the historical documentation and“proof of life”evidence used by the genealogy team.A review of the FGG methods underscores the challenges in this case(e.g.significant endogamy,multiple aliases used by the victim)and the steps taken toward resolution.Ultimately,a combined anthropology and genealogy approach resulted in a confirmed identity for a man who was murdered in 1916.Amy R.Michael Samantha H.Blatt Mariyam Isa Anthony Redgrave Douglas H.Ubelaker 2022Forensic Sciences Research2022,7,3:0
12Species distribution modeling in regions of high need and limited data: waterfowl of China显示文摘Background: A number of conservation and societal issues require understanding how species are distributed on the landscape, yet ecologists are often faced with a lack of data to develop models at the resolution and extent desired, resulting in inefficient use of conservation resources.Such a situation presented itself in our attempt to develop waterfowl distribution models as part of a multi-disciplinary team targeting the control of the highly pathogenic H5N1 avian influenza virus in China.Methods: Faced with limited data, we built species distribution models using a habitat suitability approach for China's breeding and non-breeding(hereafter, wintering) waterfowl.An extensive review of the literature was used to determine model parameters for habitat modeling.Habitat relationships were implemented in GIS using land cover covariates.Wintering models were validated using waterfowl census data, while breeding models, though developed for many species, were only validated for the one species with sufficient telemetry data available.Results: We developed suitability models for 42 waterfowl species(30 breeding and 39 wintering) at 1 km resolution for the extent of China, along with cumulative and genus level species richness maps.Breeding season models showed highest waterfowl suitability in wetlands of the high-elevation west-central plateau and northeastern China.Wintering waterfowl suitability was highest in the lowland regions of southeastern China.Validation measures indicated strong performance in predicting species presence.Comparing our model outputs to China's protected areas indicated that breeding habitat was generally better covered than wintering habitat, and identified locations for which additional research and protection should be prioritized.Conclusions: These suitability models are the first available for many of China's waterfowl species, and have direct utility to conservation and habitat planning and prioritizing management of critically important areas, providing an example of how this approach may aid others faced with the challenge of addressing conservation issues with little data to inform decision making.Diann J.Prosser Changqing Ding R.Michael Erwin Taej Mundkur Jeffery D.Sullivan Erle C.Ellis 2018Avian Research2018,9,1:0
13衰落信道中OFDM信号干扰功率分配研究显示文摘相比于加性高斯白噪声信道,目前对衰落信道中的干扰行为认识较为不足。特别是在干扰机和被干扰接收机之间的信道存在时间或频率选择性衰落时,干扰机如何或者说是否应该进行功率控制都不明确。这一问题是与下述情形密切相关的:a)对基于正交频分复用(OFDM)的信号发射系统,干扰机必须在频率选择性信道中优化其功率分配;b)对单载波系统,干扰机为了对被干扰接收机实施最佳攻击,必须在时变衰落信道中优化其功率分配。因此,文章主要研究干扰机如何在衰落信道中进行功率分配从而实现被干扰接收机的误码率最大化。文章提出了一种迭代算法来解决干扰机的功率分配问题,在误码率相同的前提下较其他常用的功率分配方法有4d B的性能提升。考虑到干扰机最优功率分配的计算复杂度较高,提出了一种低复杂度的近似最优功率分配算法使其干扰性能十分接近最优功率分配。此外,也证明了当干扰机对于被干扰机的先验信息减小时,虽然所提干扰策略获得的性能增益减少,但仍优于常规干扰策略。saidhiraj amuru r.michael buehrer 叶云霞(译) 李杰(审校) 朱辉杰(审校) 2017通信对抗2017,36,2:0
14前期应用抗甲状腺药物对Graves病患者放射性碘治疗失败率的影响显示文摘放射性碘现已广泛用于已确诊的Graves'病的治疗,作为临床常规,很多内科医生推荐在放射性素治疗前应用抗甲状腺药物(antithyroidal drug,ATD)数周以尽量减少甲状腺危象的风险。最近的数项研究未能证实在放射性碘(radioiodine,RAI)治疗后短期内甲状腺激素水平有明显的变化。而且,有报道认为,在用RAI数天前停用ATD可导致RAI有效率明显下降,一份详尽的数据分析揭示出丙基硫氧嘧啶(propylthiouracil,PTU),而不是甲硫嘧唑(methimizole,MMI)具有明显的放射防护效应,由于大多数病人可在充分使用β受体阻断剂后安全地接受RAI治疗,上述数据对RAI前常规使用ATD的合理性提出了质疑,这篇综述仔细分析了有关前期应用抗甲状腺药物对Graves病患者RAI治疗失败率的影响的数据。R.Michael Tuttle 2001世界医学杂志2001,5,12:0
15Descartes的切线二重点法:推陈出新说微积分显示文摘微积分被创立已经很久了,并且不断发展成为诸多学科的核心要求.随着使用者的改变和增多,过去的几十年中关于如何改进微积分教学和提高学生的理解水平的讨论在广泛而持续地进行着.远有19世纪80年代的微积分改革,近有K.Stroyan[Str]和F.Quinn[Qui]发表在《美国数学会通讯(Notices of the AMS)》此分栏(栏目名称为“doceamus”-译注)上的两篇最近的文章.R.Michael Range 李鹏程(译) 张汉斌(校) 2020数学译林2020,39,3:0
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