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A software fault injection system SFIS is designed,which consists of the target system plus a fault injector,fault library,workload,data collector,and data analyzer. A serial communication mechanism is adopted to simulate the factual work environment. Then a fault model is built for single particle event,which can be denoted as FM=(FL,FT). FL stands for fault location,and FT stands for fault type. The fault model supports three temporal faults: transient,intermittent,and permanent. During the experiments implemented by SFIS,the software interruption method is adopted to inject transient faults,and step trace method is adopted to inject permanent faults into the target system. The experiment results indicate that for the injected transient code segment faults,2.8 % of them do not affect the program output,80.1% of them are detected by the built-in error detection in the system,and 17.1% of them are not detected by fault detection mechanism. The experiment results verify the validity of the fault injection method. 相似文献
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建设工程施工评标模型及其应用 总被引:3,自引:0,他引:3
针对工程评标中如何选择投标单位问题,通过对工程评标过程进行分析,采用群决策层次分析法,应用改进的二级模糊综合评价方法,建立了评标模型,并给出了确定指标权重的方法,实例表明,该模型的应用可最大限度地减少人为因素,使评标更加合理、准确。 相似文献
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本文构建了基于Bayesian正则化算法的BP神经网络模型,对水平管油气水三相流相分率进行了预测,解决了振动管密度法只能测量两相流相分率的问题.通过设计的实验装置获得了测试样本,进行了预测效果检验.结果表明,神经网络预测值与实际值非常吻合,含气率预测最大误差为2.7%,含水率最大误差为3.8%,大大提高了相分率的测量精确度,为利用振动式密度计测量油气水三相流相分率提供了一种有效的方法. 相似文献
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提出了一种汽车直线制动性能的分析和计算方法,考虑车轴依次抱死之后的制动工况,引入了轮胎滑移率等影响因素,建立数学模型,用制动减速度与制动管路压力的函数关系描述汽车制动性能特征,并应用MATMB软件对具体车型进行了仿真计算。为在汽车制动性能分析中综合考虑人机工程的因素提供了一种途径。 相似文献
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