Statistical timing and power analysis of VLSI considering non-linear dependence

Majority of practical multivariate statistical analysis and optimizations model interdependence among random variables in terms of the linear correlation. Though linear correlation is simple to use and evaluate, in several cases non-linear dependence between random variables may be too strong to ignore. In this paper, we propose polynomial correlation coefficients as simple measure of multi-variable non-linear dependence and show that the need for modeling non-linear dependence strongly depends on the end function that is to be evaluated from the random variables. Then, we calculate the errors in estimation resulting from assuming independence of components generated by linear de-correlation techniques, such as PCA and ICA. The experimental results show that the error predicted by our method is within 1% error compared to the real simulation of statistical timing and leakage analysis. In order to deal with non-linear dependence, we further develop a target-function-driven component analysis algorithm (FCA) to minimize the error caused by ignoring high order dependence. We apply FCA to statistical leakage power analysis and SRAM cell noise margin variation analysis. Experimental results show that the proposed FCA method is more accurate compared to the traditional PCA or ICA.     

移动终端开放平台—Android

首先对Android平台的发展历程、架构以及特征做了简要介绍,然后结合目前发展状况预期Android平台的发展趋势,对研究面向终端消费市场的开放平台具有现实意义。     

企业服务总线技术在指挥调度系统集成中的应用

面向服务的体系结构(SOA)已经逐渐成为IT集成的主流技术,企业服务总线(ESB)是实践SOA思想的一个基础设施.本文通过对ESB技术的主要原理的阐述,以及对现有指挥调度系统集成中的需求的分析,来描述如何通过ESB技术来集成遗留系统以及新系统,解决新一代调度指挥面临的信息系统集成.     

同态滤波的一种GPU提速实现方法

为了提高光照不均图像的增强速率,提出了基于GPU平台的同态滤波并行算法.根据同态滤波算法的并行性,利用CUDA软硬件体系架构,实现了同态滤波算法向GPU上的移植.利用多幅不同分辨率图像作为测试数据,对比CPU和GPU方案的计算效率.实验结果表明,GPU实现方案大幅度提升了计算效率.     

数字家庭的信息安全架构研究

互联网技术的快速发展,在促进家庭生活面迈向数字化、智能化的同时,也给智能家庭的发展带来了安全问题和威胁,这些威胁需要提前防范并尽快解决。文章从这些安全威胁入手,分析具体的安全需求,提出在Internet环境下适用的基于数字证书的具有保密性、可认证性、可授权、数据完整性的一体化安全机制。在安全机制基础上,定义安全体系中的各部分功能。最后,对安全体系中的一些关键技术进行分析。文章的一些观点,可为运营商在智能家庭等业务应用、信息化建设及其他相关行业提供借鉴和参考。     

智能家庭环境中的家庭网关功能分析

随着物联网技术的快速发展,智能家庭的概念日渐成熟,越来越多的厂商开始关注这个领域,并根据各自的理解提出了很多数字家庭的概念和商业模式。文章分析了数字家庭的现状和未来发展趋势,并结合家庭网关的定位和优势提出基于家庭网关打造智能家庭的网络架构。     

物联网语义架构和语义关键技术研究

介绍物联网语义的概念和意义,提出物联网语义架构,并针对该语义架构中涉及的关键技术进行阐述,最后从技术角度对物联网语义的发展趋势进行展望。     

中国联通创新业务“沃云”平台规划及实施

介绍中国联通"沃云"平台的规划及实施,分析传统业务平台存在的问题,阐述应用云计算技术的中国联通"沃云"平台的优势,以及运用"沃云"平台所带来的成果。     

A multi coding technique to reduce transition activity in VLSI circuits

Advances in VLSI technology have enabled the implementation of complex digital circuits in a single chip, reducing system size and power consumption. In deep submicron low power CMOS VLSI design, the main cause of energy dissipation is charging and discharging of internal node capacitances due to transition activity. Transition activity is one of the major factors that also affect the dynamic power dissipation. This paper proposes power reduction analyzed through algorithm and logic circuit levels. In algorithm level the key aspect of reducing power dissipation is by minimizing transition activity and is achieved by introducing a data coding technique. So a novel multi coding technique is introduced to improve the efficiency of transition activity up to 52.3% on the bus lines, which will automatically reduce the dynamic power dissipation. In addition, 1 bit full adders are introduced in the Hamming distance estimator block, which reduces the device count. This coding method is implemented using Verilog HDL. The overall performance is analyzed by using Modelsim and Xilinx Tools. In total 38.2% power saving capability is achieved compared to other existing methods.     

云计算平台典型开源软件项目对比研究

云计算和开源都是当前信息技术发展的重要方向,本文研究了全球五个重要的云计算平台开源软件的特点,对比分析了它们的共同点和不同之处。