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一种基于混合模式时钟管理器的时钟频率动态重置改进算法
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作者 蒋雪凝 徐新民 oliver faust 《浙江大学学报(理学版)》 CAS CSCD 2012年第6期643-647,共5页
针对现有混合模式时钟管理器(Mixed-Mode Clock Manager,MMCM)动态重置算法占用大量ROM空间、与用户交互性不强的问题,提出一种MMCM动态重置改进型算法(IDRA).MMCM有7个输出端,可为不同电路模块提供时钟信号,直接输入MMCM输出端口序号... 针对现有混合模式时钟管理器(Mixed-Mode Clock Manager,MMCM)动态重置算法占用大量ROM空间、与用户交互性不强的问题,提出一种MMCM动态重置改进型算法(IDRA).MMCM有7个输出端,可为不同电路模块提供时钟信号,直接输入MMCM输出端口序号和频率值即可改变相应端口的输出时钟频率.动态重置端口(Dynamic reconfiguration port,DRP)与加强型MMCM原型连接,采用状态机来驱动DRP,顺序实现读取输出端口寄存器地址、选择改变输出时钟频率或相移、读取分频值、使能端口寄存器读写等功能.最后,给出0号输出端口时钟频率由100MHz降为50MHz的仿真波形,此频率可变范围为4.69~700MHz. 展开更多
关键词 混合模式时钟管理器 时钟频率 动态重置端口 状态机
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Breast imaging:A survey 被引量:1
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作者 Subbhuraam Vinitha Sree Eddie Yin-Kwee Ng +1 位作者 Rajendra U Acharya oliver faust 《World Journal of Clinical Oncology》 CAS 2011年第4期171-178,共8页
Breast cancer is the second leading cause of death in women.It occurs when cells in the breast start to grow out of proportion and invade neighboring tissues or spread throughout the body.Mammography is one of the mos... Breast cancer is the second leading cause of death in women.It occurs when cells in the breast start to grow out of proportion and invade neighboring tissues or spread throughout the body.Mammography is one of the most effective and popular modalities presently used for breast cancer screening and detection.Efforts have been made to improve the accuracy of breast cancer diagnosis using different imaging modalities.Ultrasound and magnetic resonance imaging have been used to detect breast cancers in high risk patients.Recently,electrical impedance imaging and nuclear medicine techniques are also being widely used for breast cancer screening and diagnosis.In this paper,we discuss the capabilities of various breast imaging modalities. 展开更多
关键词 BREAST cancer BREAST magnetic RESONANCE imaging BREAST ULTRASOUND MAMMOGRAPHY THERMOGRAPHY
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