在SOR模型的基础上提出了BRO-SOC(Backward Recovery Oriented Sphere Of Correctness)框架。在该框架的指导下提出了DoubleRun容错处理器方案。DoubleRun使用确定性重播(Deterministic Replay)技术保证处理器的可靠性。由于Double-Run...在SOR模型的基础上提出了BRO-SOC(Backward Recovery Oriented Sphere Of Correctness)框架。在该框架的指导下提出了DoubleRun容错处理器方案。DoubleRun使用确定性重播(Deterministic Replay)技术保证处理器的可靠性。由于Double-Run将故障的检测边界设置在BRO-SOC框架的SOC2一级,因此只需对L1cache进行适当扩展即可容忍处理器流水线中的瞬态故障,由于它不需改动现有的处理器流水线,故相比于其他方案对处理器流水线的性能影响更小。利用SPEC2000的部分程序测试了DoubleRun的无故障性能。为将DoubleRun与其他容错方案(DCC、Slipstream)作横向比较而提出了衡量指标TAC(Timeand Area Cost)。实验结果表明,DoubleRun在提供全故障覆盖率的情况下仅增加了6.9%的面积开销和89.8%的时间开销,其TAC虽然比Slipstream大7%但却可以提供全面的故障覆盖率,其故障覆盖能力与DCC相同但TAC却比后者小14%。展开更多
Fault tolerance in microprocessor systems has become a popular topic of architecture research. Much work has been done at different levels to accomplish reliability against soft errors, and some fault tolerance archit...Fault tolerance in microprocessor systems has become a popular topic of architecture research. Much work has been done at different levels to accomplish reliability against soft errors, and some fault tolerance architectures have been proposed. But little attention is paid to the thread level superscalar fault tolerance. This letter introduces microthread concept into superscalar processor fault tolerance domain, and puts forward a novel fault tolerance architecture, namely, MicroThread Based (MTB) coarse grained transient fault tolerance superscalar processor architecture, then discusses some detailed implementations.展开更多
To evaluate the fatigue damage reliability of critical members of the Nanjing Yangtze river bridge, according to the stress-number curve and Miner’s rule, the corresponding expressions for calculating the structural ...To evaluate the fatigue damage reliability of critical members of the Nanjing Yangtze river bridge, according to the stress-number curve and Miner’s rule, the corresponding expressions for calculating the structural fatigue damage reliability were derived. Fatigue damage reliability analysis of some critical members of the Nanjing Yangtze river bridge was carried out by using the strain-time histories measured by the structural health monitoring system of the bridge. The corresponding stress spectra were obtained by the real-time rain-flow counting method. Results of fatigue damage were calculated respectively by the reliability method at different reliability and compared with Miner’s rule. The results show that the fatigue damage of critical members of the Nanjing Yangtze river bridge is very small due to its low live-load stress level.展开更多
House keeping systems must hold such advantages as light weight,,mall volume and low power consumption to meet the demand of micro-satellites. This paper, based on the specific characteristics of Stereo Mapping Micro-...House keeping systems must hold such advantages as light weight,,mall volume and low power consumption to meet the demand of micro-satellites. This paper, based on the specific characteristics of Stereo Mapping Micro-satellite (SMMS), describes the house keeping system with its advantage of having a centralized and distributed control in one system and analyzes the reliability based on Neural network model.展开更多
文摘在SOR模型的基础上提出了BRO-SOC(Backward Recovery Oriented Sphere Of Correctness)框架。在该框架的指导下提出了DoubleRun容错处理器方案。DoubleRun使用确定性重播(Deterministic Replay)技术保证处理器的可靠性。由于Double-Run将故障的检测边界设置在BRO-SOC框架的SOC2一级,因此只需对L1cache进行适当扩展即可容忍处理器流水线中的瞬态故障,由于它不需改动现有的处理器流水线,故相比于其他方案对处理器流水线的性能影响更小。利用SPEC2000的部分程序测试了DoubleRun的无故障性能。为将DoubleRun与其他容错方案(DCC、Slipstream)作横向比较而提出了衡量指标TAC(Timeand Area Cost)。实验结果表明,DoubleRun在提供全故障覆盖率的情况下仅增加了6.9%的面积开销和89.8%的时间开销,其TAC虽然比Slipstream大7%但却可以提供全面的故障覆盖率,其故障覆盖能力与DCC相同但TAC却比后者小14%。
文摘Fault tolerance in microprocessor systems has become a popular topic of architecture research. Much work has been done at different levels to accomplish reliability against soft errors, and some fault tolerance architectures have been proposed. But little attention is paid to the thread level superscalar fault tolerance. This letter introduces microthread concept into superscalar processor fault tolerance domain, and puts forward a novel fault tolerance architecture, namely, MicroThread Based (MTB) coarse grained transient fault tolerance superscalar processor architecture, then discusses some detailed implementations.
基金Project(2001G025) supported by the Foundation of the Science and Technology Section of Ministry of Rail way of Chinaproject(2005) supported by the Postdoctoral Foundation of Central South University
文摘To evaluate the fatigue damage reliability of critical members of the Nanjing Yangtze river bridge, according to the stress-number curve and Miner’s rule, the corresponding expressions for calculating the structural fatigue damage reliability were derived. Fatigue damage reliability analysis of some critical members of the Nanjing Yangtze river bridge was carried out by using the strain-time histories measured by the structural health monitoring system of the bridge. The corresponding stress spectra were obtained by the real-time rain-flow counting method. Results of fatigue damage were calculated respectively by the reliability method at different reliability and compared with Miner’s rule. The results show that the fatigue damage of critical members of the Nanjing Yangtze river bridge is very small due to its low live-load stress level.
文摘House keeping systems must hold such advantages as light weight,,mall volume and low power consumption to meet the demand of micro-satellites. This paper, based on the specific characteristics of Stereo Mapping Micro-satellite (SMMS), describes the house keeping system with its advantage of having a centralized and distributed control in one system and analyzes the reliability based on Neural network model.
