检索结果-南通市图书馆

软件和集成电路 2019年第10期 12-13页

作者： darren Ng Akamai

采用TCP拥塞控制算法所能实现的理想效果是,通过算法猜测网络瓶颈在哪里,在达到瓶颈值之前尽可能多地发送数据,同时尽可能接近瓶颈上限而又不超过,而非发生拥塞后再做出反应。

关键词：网络瓶颈拥塞控制算法制动 TCP 发送

在线全文

学校读者我要写书评

暂无评论

集成ZigBee无线电设计、检定和验证

电子设计技术 EDN CHINA 2012年第3期19卷 54-54,56页

作者： darren McCarthy 泰克公司

随着ZigBee协议在各类嵌入式系统和应用中变得越来越常见，工程师需要能够快速、高效地确认并验证ZigBee模块的性能。这一系统级任务由于射频（RF）信号的存在和需要考虑模拟、数字和射频信号的相互作用而变得更加复杂。本文中，一种称... 详细信息

随着ZigBee协议在各类嵌入式系统和应用中变得越来越常见，工程师需要能够快速、高效地确认并验证ZigBee模块的性能。这一系统级任务由于射频（RF）信号的存在和需要考虑模拟、数字和射频信号的相互作用而变得更加复杂。本文中，一种称为混合域示波器（MDO，其名称源于其包含频谱分析电路）的新型示波器可帮助减轻ZigBee测试任务。首先，我们来看一看主要设计考虑事项及相关折衷和权衡。

关键词： ZigBee 无线电集成电路混合域示波器泰克公司

在线全文

学校读者我要写书评

暂无评论

丝网印刷在太阳能电池制造中的挑战

集成电路应用 2009年第8期26卷 38-39页

作者： darren Brown DEK International

提高太阳能电池的功率和生产力成为重要的挑战,丝网印刷工艺可以最大限度地提高制造商所寻求的因素。太阳能电池制造商当今面临的挑战正在开始两极分化成两大重点:提高太阳能电池的功率以增加单位面积的发电量;其次是无需增加相应投资... 详细信息

提高太阳能电池的功率和生产力成为重要的挑战,丝网印刷工艺可以最大限度地提高制造商所寻求的因素。太阳能电池制造商当今面临的挑战正在开始两极分化成两大重点:提高太阳能电池的功率以增加单位面积的发电量;其次是无需增加相应投资而以现有的工艺提高生产力的愿望或需求。

关键词：太阳能电池金属制造商生产线光生伏打电池金属材料孔版印刷丝网印刷硅片

在线全文

学校读者我要写书评

暂无评论

查找无线嵌入式系统中的噪声来源

国外电子测量技术 2011年第9期30卷 5-8页

作者： darren McCarthy 泰克公司

在把无线电芯片或模块集成到典型的嵌入式系统中时,设计人员必须面临的一项常见任务是追踪和消除噪声和杂散信号。潜在的噪声来源包括：开关电源、来自系统其它部分的数字噪声、以及外部噪声来源。

关键词：嵌入式系统无线电芯片噪声来源杂散信号消除噪声设计人员开关电源数字噪声

Real-time PCR diagnosis of Schistosoma japonicum in low transmission areas of China

在线全文

学校读者我要写书评

暂无评论

Infectious Diseases of Poverty 2018年第1期7卷 87-97页

作者： Pei He Catherine A.Gordon Gail M.Williams Yuesheng Li Yuanyuan Wang junjian Hu darren j.Gray Allen G.Ross Donald Harn Donald P.McManus Hunan Institute of Parasitic Diseases YueyangPeople’s Republic of China Molecular Parasitology Laboratory Infectious Diseases DivisionQIMR Berghofer Medical Research InstituteBrisbaneAustralia Discipline of Epidemiology and Biostatistics School of Population HealthUniversity of QueenslandBrisbaneAustralia Research School of Population Health The Australian National UniversityCanberraAustralia Menzies Health Institute Queensland Griffith UniversityGold CoastQLDAustralia University of Georgia College of Veterinary MedicineAthensGAUSA.

Background:Schistosomiasis in the People’s Republic of China(PRC)can be traced back to *** the past 60 years,the Chinese government has made great efforts to control this persistent disease with elimination slated by 2020 through the implementation of a comprehensive control *** strategy aims to reduce the role of bovines and humans as sources of infection as a pre-requisite for elimination through transmission *** goal of elimination will be achievable only by the implementation of a sustainable surveillance and control system,with sensitive diagnosis a key feature so that the true disease burden is not *** used diagnostics lack the necessary sensitivity to accurately determine the prevalence of Schistosoma japonicum infection in areas with low infection *** is of critical importance to find and treat people and to identify animals with low-level infections if the National Control Programme for China is to achieve schistosomiasis ***:We evaluated a real-time polymerase chain reaction(qPCR)assay using 633 human stool samples collected from five villages in Hunan,Anhui,Hubei,and jiangxi provinces,and 182 bovine(70 cattle and 112 buffalo)stool samples obtained from four villages in Hunan,Anhui,and jiangxi provinces in the *** stool samples were subjected to the miracidium hatching test(MHT,a diagnostic procedure used in the National Schistosomiasis Control Programme)and the qPCR *** positive by MHT were subjected to either the Kato-katz technique for humans,or the formalin-ethyl acetate sedimentation-digestion(FEA-SD)procedure for bovines,to determine infection ***:The qPCR assay exhibited a high level of sensitivity in the detection of *** *** both the human and bovine samples,a significantly higher prevalence was determined using the qPCR assay(11.06%humans,24.73%bovines)than with the MHT(0.93%humans,7.69%bovines).The animal contamination

关键词： Schistosomiasis Schistosoma japonicum China Real-time PCR Miracidium hatching test Kato-katz FEA-SD Bovine Human

在线全文

学校读者我要写书评

暂无评论

简化现代雷达测试分析

国外电子测量技术 2014年第3期33卷 22-26页

作者： darren Mc Carthy 罗德与施瓦茨公司

先进的的下一代雷达系统受益于数字技术和计算能力的进步.雷达基带部分越来越倾向于使用直接数字合成（direct digital synthesis,DDS）技术,从而具有强大的数字信号处理和宽基带波形生成能力,以便创建软件定义的雷达.DDS雷达优点突出.... 详细信息

先进的的下一代雷达系统受益于数字技术和计算能力的进步.雷达基带部分越来越倾向于使用直接数字合成（direct digital synthesis,DDS）技术,从而具有强大的数字信号处理和宽基带波形生成能力,以便创建软件定义的雷达.DDS雷达优点突出.在评估是否应该将这一技术与有源电子扫描天线（active electronically scanned antenna,AESA）技术相结合时,应该考虑下述潜在的系统优点：

关键词：现代雷达测试分析数字技术直接数字合成数字信号处理电子扫描天线计算能力雷达系统

关于成人网络游戏玩家与未成年网络游戏玩家的比较研究

在线全文

学校读者我要写书评

暂无评论

中国青年研究 2006年第6期 18-23页

作者： M.D.Griffiths Mark N.O.Davies darren Chappell 范晓光 Psychology Division Nottingham Trent UniversityBurton StreetNottingham NGI4BUUK 浙江社会科学院社会学所

尽管网络游戏日益流行，但一直没有关于成人游戏者与未成人游戏者的比较性调查。为此，我们对EverQuest（简称EQ，中文名称为“无尽的任务”，是由美国索尼在线娱乐公司开发的知名网络游戏——译者注）游戏者（n=540）的相关特征进行了... 详细信息

尽管网络游戏日益流行，但一直没有关于成人游戏者与未成人游戏者的比较性调查。为此，我们对EverQuest（简称EQ，中文名称为“无尽的任务”，是由美国索尼在线娱乐公司开发的知名网络游戏——译者注）游戏者（n=540）的相关特征进行了网上问卷调查。该调查主要考察了游戏玩家基本的人口学特征、游戏的频率、玩游戏的历史、游戏的偏好及玩游戏的代价等。结果表明未成年的游戏者多为男性，相较于成年游戏者，他们更不喜欢变换角色性别，更愿意牺牲学习和工作的时间。在游戏偏好的比较中，成年与非成年游戏群体的最大区别在于更多的未成年人认为他们喜好的游戏因素是暴力性。调查结果同时还证实，越年轻的玩家每周耗费在游戏上的时间越长。

关键词：游戏玩家未成年人网络游戏成人游戏网上问卷调查人口学特征中文名称娱乐公司游戏因素调查结果

Weed Control, Environmental Impact, and Net-Profit of Two-Pass Weed Management Strategies in Dicamba-Resistant Soybean (<i>Glycine max</i>) Using Conventional Tillage

在线全文

学校读者我要写书评

暂无评论

American journal of Plant Sciences 2017年第13期8卷 3414-3428页

作者： Matthew G. Underwood Nader Soltan David C. Hooker darren E. Robinson joseph P. Vink Clarence j. Swanton Peter H. Sikkema Department of Plant Agriculture University of Guelph Ridgetown Canada

Traditional two-pass weed management strategies need to be compared with new strategies in glyphosate/dicamba-resistant soybean. Weed control, soybean yield, partial profitability and environmental impact (EI) were evaluated in glyphosate/dicamba-resistant soybean using dicamba applied alone or in a tank-mix with dimethenamid-P applied preemergence (PRE). Trials were conducted at three locations during 2014 and 2015. Several PRE herbicides provided excellent control of broadleaf and grass weeds. Dicamba provided > 91% control of broadleaf weeds, and the addition of dimethenamid-P improved grass control. All weed species at the trial locations were controlled > 94% following a postemergence (POST) application of glyphosate. Weed interference reduced soybean seed yield 33% where no herbicide was applied. A single POST application of glyphosate had the lowest EI. Several treatments improved early-season weed control and reduced early-season weed density and biomass compared to glyphosate and had similar EI values. In this study, there was no benefit to yield or partial profit by including a PRE herbicide for weed management;however, the inclusion of multiple modes-of-action in a herbicide program may reduce the selection for herbicide-resistant weeds.

关键词： Density Environmental Impact Injury Profit Analysis Tillage Yield Weed Control

In vitro evaluation of a new resilient, hard-carbon, thin-film coating as a bearing material for ventricular assist devices ——In Vitro Bearing Evaluation of BioMedFlex

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

journal of Biomedical Science and Engineering 2010年第5期3卷 525-528页

作者： Nicole A. Mielke Alex L. Massiello David j. Horvath Stephen M. Benefit darren Burgess Leonard A. R. Golding Kiyotaka Fukamachi 不详

Our aim was to evaluate the potential use of BioMedFlex? (BMF), a new resilient, hard-carbon, thin- film coating, as a blood journal bearing material in Cleveland Heart’s continuous-flow left and right ven- tricular assist devices (VADs). BMF is not classified as a diamond-like carbon (DLC) and differs from other thin-film carbon coatings by its high flexural strength, radiopacity, and wear resistance. A 2- to 4-μm-thick BMF adhesion layer was deposited on the VAD journal bearing surfaces. A commercial DLC coating used in other clinical blood pump applications was used as a control. Durability and reliability of the BMF coating was verified in severe pump start/stop testing using 20 BMF-coated journal bearing pairs. The BMF-coated surfaces showed no coating failures, whereas 57% of the DLC bearing pairs developed scratches through the carbon coating, documenting that BMF can provide a durable coating in our blood journal bearing application. In conclusion, BMF has shown qualities that support its significant advantages as an alternative journal bea- ring material in Cleveland Heart pumps. Our plan includes biocompatibility testing with ongoing animal studies, endurance testing with submerged pumps running in saline, and assessment of batch coating processing capability.

关键词： Heart Assist Device Diamond-Like Carbon Materials Testing Wear Resistance journal Bearing

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

众多趋势推动微型化发展

今日电子 2015年第12期 31-32页

作者： MIKE HIGASHIKAWA darren SCHAUER MOLEX公司

MoleX的SlimStack Armor 0．35mm螺距连接器设计用于移动设备和其他紧密封装的应用，通过金属保护罩可提供高达3A的额外功率。

关键词：微型化 MoleX 移动设备连接器保护罩封装