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Evaluating software architectures for realtime systems


Controlled experiments have proven to be an effective means for evaluating software engineering techniques and gaining the necessary understanding about their utility.


Evaluating software quality classification models in the presence of varying cost ratios is important, because the usefulness of a model is dependent on the systemspecific costs of misclassifications.


Scenariobased methods for evaluating software architecture require a large number of stakeholders to be collocated for evaluation meetings.


This paper presents a controlled experiment that we conducted to assess the effectiveness of one of the key activities, developing scenario profiles, of the proposed groupwaresupported process of evaluating software architecture.

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 A software system to estimate the effect of heat presevent for long distance lines based on Larson Miller method and infrared image as well as the databases of operation parameters was established.Not only the effect of heat presevent for long distance lines can be given by the statistically analysis of temperatures,but also total heat loss can be given confidently by comparing of the results.A new on line statistically analysis method to obtain heat loss quickly and long distance has been developed by... A software system to estimate the effect of heat presevent for long distance lines based on Larson Miller method and infrared image as well as the databases of operation parameters was established.Not only the effect of heat presevent for long distance lines can be given by the statistically analysis of temperatures,but also total heat loss can be given confidently by comparing of the results.A new on line statistically analysis method to obtain heat loss quickly and long distance has been developed by the software.More accurate lines replacement during shutdown can be made and better temperature adjustment for optimize production and minimize heat loss through this software.  利用红外热成像技术 ,在传热学理论研究和分析的基础上 ,研制了一套在线长距离管线保温评估软件系统 ,实现了长距离管线保温效果方便而快捷的在线检测与评估。研究结果在某厂长距离蒸汽管线上得到成功应用 ,在运行状况下进行了管线表面温度场的红外热像测试和保温评估 ,为厂方决策提供了科学依据  A software system to estimate the heat preservation based on the calculation heat flow and infrared image was developed to evaluate the heat preservation effect for large equipment on line.The statistical analys is method was used in heat preservation evaluation with infrared image.Infrared image detection of a longdistance pipeline was taken to test the statistical a nalysis method.The data from the software were analysed ststistically.The result s showed that the experimental values of heat flow at different... A software system to estimate the heat preservation based on the calculation heat flow and infrared image was developed to evaluate the heat preservation effect for large equipment on line.The statistical analys is method was used in heat preservation evaluation with infrared image.Infrared image detection of a longdistance pipeline was taken to test the statistical a nalysis method.The data from the software were analysed ststistically.The result s showed that the experimental values of heat flow at different place on one inf rated image obeyed the normal probability distribution.The mean value μ in nor ma l probability distribution expressed the average heat flow on one infrared image .The larger the μ values is,the larger the heat loss.The variance σ in the nor m al probability distribution expressed the range of detected data on one infrared image.The larger the σ values is,the more of the kinds and degree of defects.T herefore,the μ values could be used to predicting the totally heat loss of larg e equipment and to evaluate the kinds and degree of defects.The test of signific ance and confidence interval for μ and σ are discussed.  利用红外热成像技术 ,在传热学理论研究和分析的基础上 ,研制了一套大型设备在线保温评估软件系统 ,实现了大型设备保温效果方便而快捷的在线检测与评估。将统计分析的方法应用于红外热像保温评估的数据分析 ,其结果能更好的逼近真实值。统计分析表明 ,同一幅红外热图上的热流密度值服从正态分布 ,正态分布的均值 μ反映了该区域的平均热流损失 ,μ越大 ,热流损失越大。正态分布的方差 σ反映了数据的分散程度 ,σ越大 ,缺陷种类和级别越多。能用正态分布的 μ和 σ显著性检验方法区分不同程度的保温缺陷。同时也能给出在一定概率下 ,数据处理所得到的 μ和 σ的置信区间以判断结果的可信度  >=It is recognized that soft arithmetic such as filtering etc can improve the alignment and navigation precision of the ring laser gyroscope strapdown inertial navigation system (SINS) on the current hardware foundation. In order to evaluate the filtering effect of the ring laser gyroscope (RLG), the Allan variance analysis algorithm is designed, and the alignment and navigation software and precision analysis software are exploited, with which the research is developed from the view of element and system respectively.... >=It is recognized that soft arithmetic such as filtering etc can improve the alignment and navigation precision of the ring laser gyroscope strapdown inertial navigation system (SINS) on the current hardware foundation. In order to evaluate the filtering effect of the ring laser gyroscope (RLG), the Allan variance analysis algorithm is designed, and the alignment and navigation software and precision analysis software are exploited, with which the research is developed from the view of element and system respectively. And the validate experiment is had with the RLG SINS.  在现有硬件的基础上,通过滤波等软件算法来提高激光陀螺捷联惯导系统对准和导航精度是目前国内外学者所公认的。为了对激光陀螺滤波前后的效果进行准确、定量的评估,设计了Allan方差分析算法,开发了对准导航及精度分析评估软件,分别从元件级、系统级对其展开了研究,并结合具体激光陀螺捷联惯导设备对其进行了实验验证。  
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