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7篇 您的检索式:作者名="Keith Coffey"
    题名 作者 年代 出处 被引量
18位微控制器如何成为系统单芯片解决方案显示文摘过去15年来,许多人都曾预测8位微控制器即将退出舞台,然而这却是电子产业失误最大的预测之一;事实上,虽然16和32位产品已极为常见,8位微控制器的需求仍继续成长,总值约达到今日100亿美元全球微控制器市场的一半。推动8位市场快速发展及成长的动力主要来自于8位产品效能的大幅提升,特别是以8051系列为基础的产品,其它原因还包括芯片内建功能的加强以及不断缩小的封装体积。今天,这类组件已能提供高达100MIPS的产出。Keith Coffey 2004电子与电脑2004,,7:2
2DEATH IN THE OPERATING ROOM: AN ANALYSIS OF A MULTI-CENTER EXPERIENCE显示文摘David B. Hoyt Eileen M. Bulger M. Margaret Knudson John Morris Ralph lerardi Harvey J. Sugerman Steven R. Shackford Jeffery Landercasper Robert J. Winchell Gregory Jurkovich Susan C. Coffey Michael Chang Keith F. O?Malley James Lowry Gino T. Trevisani Tho 1994The Journal of Trauma: Injury Infection and Critical Care1994,,3:1
3走进数字电源新时代显示文摘近来,市场对数字化电源的需求已大幅攀升。先进的半导体工艺技术不但使元器件速度更快、体积更小,而且它们还要求更低(密度更大)的供电电压和更高的供电电流;在此同时,最终系统的功能持续提升,而体积和平均售价则不断下降。这些因素迫使电源设计者要不断地开发出更精确、响应速度更快、效率更高、体积更小、成本更低和上市时间更快的电源产品。面对这些问题,传统模拟控制解决方案正逐渐变得束手无策。SILICON LABORATORIES KEITH COFFEY 2006世界电子元器件2006,,3:1
4Correlation Between Nottingham Prognostic Index and Adjuvant! Online Prognostic Tools in Patients With Early-Stage Breast Cancer in Mid-Western Ireland显示文摘Keith Ian Quintyne Bernie Woulfe John C. Coffey Rajnish K. Gupta 2013Clinical Breast Cancer2013,,4:1
5电源顺序和追踪解决方案的设计与选择显示文摘使用多组电源已成为数字组件设计的常见技巧,而且这种方法也不再局限于高阶应用,FPGA、DSP、RISC处理器和通讯组件的设计人员也开始采用省电的[多重Vdd]架构,让核心功能得以在较低电压(功耗较少)下工作,至于3.3至5V的作业则只保留给设计中绝对必要的部份,例如外部界面和I/O。Keith Coffey 2004电子与电脑2004,,10:0
6A combination of density-based clustering method and DEM to numerically investigate the breakage of bonded pharmaceutical granules in the ball milling process显示文摘Ball milling is widely used in industry to mill particulate material.The primary purpose of this process is to attain an appropriate product size with the least possible energy consumption.The process is also extensively utilised in pharmaceuticals for the comminution of the excipients or drugs.Surprisingly,for ball mill,little is known concerning the mechanism of size reduction.Traditional prediction approaches are not deemed useful to provide significant insights into the operation or facilitate radical step changes in performance.Therefore,the discrete element method(DEM)as a computational modelling approach has been used in this paper.In previous research,DEM has been applied to simulate breaking behaviour through the impact energy of all ball collisions as the driving force for fracturing.However,the nature of pharmaceutical material fragmentation during ball milling is more complex.Suitable functional equations which link broken media and applied energy do not consider the collision of particulate media of different shapes or collisions of particulate media(such as granules)with balls and rotating mill drum.This could have a significant impact on fragmentation.Therefore,this paper aimed to investigate the fragmentation of bounded particles into DEM granules of different shape/size during the ball milling process.A systematic study was undertaken to explore the effect of milling speed on breakage behaviour.Also,in this study,a combination of a density-based clustering method and discrete element method was employed to numerically investigate the number and size of the fragments generated during the ball milling process over time.It was discovered that the collisions of the ball increased proportionally with rotation speed until reaching the critical rotation speed.Consequently,results illustrate that with an increase of rotation speed,the mill power increased correspondingly.The caratacting motion of mill material together with balls was identified as the most effective regime regarding the fragmentation,and fewer breakage events occurred for centrifugal motion.Higher quantities of the fines in each batch were produced with increased milling speed with less quantities of grain fragments.Moreover,the relationship between the number of produced fragment and milling speed at the end of the process exhibited a linear tendency.Alexander Krok Peter Peciar Kieran Coffey Keith Bryan Sandra Lenihan 2021Particuology2021,19,5:0
7跨越数字障碍的模拟传输显示文摘Keith Coffey 2006电子设计技术 EDN CHINA2006,13,9:0
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