With shrinking transistor feature size,the fin-type field-effect transistor（FinFET） has become the most promising option in low-power circuit design due to its superior capability to suppress leakage.To support the ...With shrinking transistor feature size,the fin-type field-effect transistor（FinFET） has become the most promising option in low-power circuit design due to its superior capability to suppress leakage.To support the VLSI digital system flow based on logic synthesis,we have designed an optimized high-performance low-power FinFET standard cell library based on employing the mixed FBB/RBB technique in the existing stacked structure of each cell.This paper presents the reliability evaluation of the optimized cells under process and operating environment variations based on Monte Carlo analysis.The variations are modelled with Gaussian distribution of the device parameters and 10000 sweeps are conducted in the simulation to obtain the statistical properties of the worst-case delay and input-dependent leakage for each cell.For comparison,a set of non-optimal cells that adopt the same topology without employing the mixed biasing technique is also generated.Experimental results show that the optimized cells achieve standard deviation reduction of 39.1%and 30.7%at most in worst-case delay and inputdependent leakage respectively while the normalized deviation shrinking in worst-case delay and input-dependent leakage canbe up to 98.37%and 24.13%,respectively,which demonstrates that our optimized cells are less sensitive to variability and exhibit more reliability.展开更多
故障树分析(Fault Tree Analysis)在系统可靠性评估中起着至关重要的作用。然而,作为故障树分析的核心故障树(FT)的构建,传统构建故障树的方法存在耗时长且容易出错等缺点。为了解决这些问题并应对复杂系统自动建造故障树的困难,该文提...故障树分析(Fault Tree Analysis)在系统可靠性评估中起着至关重要的作用。然而,作为故障树分析的核心故障树(FT)的构建,传统构建故障树的方法存在耗时长且容易出错等缺点。为了解决这些问题并应对复杂系统自动建造故障树的困难,该文提出一种基于元部件模型及系统结构模型的规范化描述方法,并以此为基础,通过建立元部件模型库、复杂标识符库,设计出故障树自动建树及分析软件,实现系统结构模型搭建、自动建树、复杂结构识别处理及可靠性分析过程的全自动化。详细阐述了故障树自动建树软件自动建树及分析的基本步骤,并通过一个简化的汽车ABS系统应用实例验证了该软件的有效性和可行性。实例应用结果表明,该故障树自动建树及分析软件不仅能够实现自动构建和分析故障树,提高工作效率,而且能够识别处理具有复杂结构的故障树,对复杂系统的自动建树及可靠性分析的推广具有重要意义。展开更多
为满足卫星平台快速研制和部组件即插即用的需求,针对小卫星研制产品化、数字化及规模化发展,提出了一种低成本功率与通信总线集成技术,可实现部组件接口标准化,满足部组件功率传输加断电控制和信号传输电气标准一致性的要求.为了兼容...为满足卫星平台快速研制和部组件即插即用的需求,针对小卫星研制产品化、数字化及规模化发展,提出了一种低成本功率与通信总线集成技术,可实现部组件接口标准化,满足部组件功率传输加断电控制和信号传输电气标准一致性的要求.为了兼容现有部组件控制器局域网络(controller area network,CAN)总线接口(采用信号电源线传输串行编码数据解决功率传输加断电控制的问题),提出了一种低成本电路方案,确保加断电指令的三模冗余,从而实现了基于CAN总线的功率信号传输电路容错技术方案,满足星载可靠性应用.试验结果证明了新技术方法实用有效.展开更多
Language testing is an important link in language teaching,in this paper,the two important criteria of language test the reliability and validity has carried on the detailed elaboration,in order to a language teacher ...Language testing is an important link in language teaching,in this paper,the two important criteria of language test the reliability and validity has carried on the detailed elaboration,in order to a language teacher proposition and evaluation test more scientific.展开更多
基金Project supported by the National Natural Science Foundation of China(No.61306040)the State Key Development Program for Basic Research of China(No.2015CB057201)+1 种基金the Beijing Natural Science Foundation(No.4152020)Natural Science Foundation of Guangdong Province,China(No.2015A030313147)
文摘With shrinking transistor feature size,the fin-type field-effect transistor（FinFET） has become the most promising option in low-power circuit design due to its superior capability to suppress leakage.To support the VLSI digital system flow based on logic synthesis,we have designed an optimized high-performance low-power FinFET standard cell library based on employing the mixed FBB/RBB technique in the existing stacked structure of each cell.This paper presents the reliability evaluation of the optimized cells under process and operating environment variations based on Monte Carlo analysis.The variations are modelled with Gaussian distribution of the device parameters and 10000 sweeps are conducted in the simulation to obtain the statistical properties of the worst-case delay and input-dependent leakage for each cell.For comparison,a set of non-optimal cells that adopt the same topology without employing the mixed biasing technique is also generated.Experimental results show that the optimized cells achieve standard deviation reduction of 39.1%and 30.7%at most in worst-case delay and inputdependent leakage respectively while the normalized deviation shrinking in worst-case delay and input-dependent leakage canbe up to 98.37%and 24.13%,respectively,which demonstrates that our optimized cells are less sensitive to variability and exhibit more reliability.
文摘故障树分析(Fault Tree Analysis)在系统可靠性评估中起着至关重要的作用。然而,作为故障树分析的核心故障树(FT)的构建,传统构建故障树的方法存在耗时长且容易出错等缺点。为了解决这些问题并应对复杂系统自动建造故障树的困难,该文提出一种基于元部件模型及系统结构模型的规范化描述方法,并以此为基础,通过建立元部件模型库、复杂标识符库,设计出故障树自动建树及分析软件,实现系统结构模型搭建、自动建树、复杂结构识别处理及可靠性分析过程的全自动化。详细阐述了故障树自动建树软件自动建树及分析的基本步骤,并通过一个简化的汽车ABS系统应用实例验证了该软件的有效性和可行性。实例应用结果表明,该故障树自动建树及分析软件不仅能够实现自动构建和分析故障树,提高工作效率,而且能够识别处理具有复杂结构的故障树,对复杂系统的自动建树及可靠性分析的推广具有重要意义。
文摘为满足卫星平台快速研制和部组件即插即用的需求,针对小卫星研制产品化、数字化及规模化发展,提出了一种低成本功率与通信总线集成技术,可实现部组件接口标准化,满足部组件功率传输加断电控制和信号传输电气标准一致性的要求.为了兼容现有部组件控制器局域网络(controller area network,CAN)总线接口(采用信号电源线传输串行编码数据解决功率传输加断电控制的问题),提出了一种低成本电路方案,确保加断电指令的三模冗余,从而实现了基于CAN总线的功率信号传输电路容错技术方案,满足星载可靠性应用.试验结果证明了新技术方法实用有效.
文摘Language testing is an important link in language teaching,in this paper,the two important criteria of language test the reliability and validity has carried on the detailed elaboration,in order to a language teacher proposition and evaluation test more scientific.
