The extraction of spectral parameters is very difficult because of the limited energy resolution for NaI （TI） gamma-ray detectors. For statistical fluctuation of radioactivity under complex environment, some smoothi...The extraction of spectral parameters is very difficult because of the limited energy resolution for NaI （TI） gamma-ray detectors. For statistical fluctuation of radioactivity under complex environment, some smoothing filtering methods are proposed to solve the problem. These methods include adopting method of arithmetic moving average, center of gravity, least squares of polynomial, slide converter of discrete funcion convolution etc. The process of spectrum data is realized, and the results are assessed in H/FWHM（ Peak High/Full Width at Half Maximum） and peak area based on the Matlab programming. The results indicate that different methods smoothed spectrum have respective superiority in different ergoregion, but the Gaussian function theory in discrete function convolution slide method is used to filter the complex y-spectrum on Embedded system nlatform, and the statistical fluctuation of y-snectrum filtered wall.展开更多
铁路线路速度目标值的选择,直接影响铁路线路设计的其他主要技术标准的选择、车辆选型、设备配置、工程投资等。选择一种科学有效的模型,对速度目标值方案进行综合评价对铁路线路设计的后续工作具有重要意义。利用层次分析法原理建立速...铁路线路速度目标值的选择,直接影响铁路线路设计的其他主要技术标准的选择、车辆选型、设备配置、工程投资等。选择一种科学有效的模型,对速度目标值方案进行综合评价对铁路线路设计的后续工作具有重要意义。利用层次分析法原理建立速度目标值综合评价体系,引入CRITIC-G1法(Criteria Importance Though Intercrieria Correlation-Order Relation Analysis Method,CRITIC-G1)的综合赋权方法计算各评价指标的权重。采用基于灰色关联改进的TOPSIS(Technique for Order Preference by Similarity to an Ideal Solution,TOPSIS)多目标决策方法确定最优方案。以西安-江油段速度目标值方案比选为例验证模型的合理性,计算结果表明速度目标值为350km/h的方案最优,与工程实际相符。结果表明:本文提出的基于CRITIC-G1的综合评价方法,能够体现各评价指标间的差异性和相关性,同时也能体现主观经验的偏好性,是一种较为科学、合理的评价方法.展开更多
基金Sponsored by the Natural Science Fundation of Jiangxi Province(Grant No.20114BAB211026 and 20122BAB201028)the Open Science Fund from Key Laboratory of Radioactive Geology and Exploration Technology Fundamental Science for National Defense,East China Institute of Technology(Grant No.2010RGET11)
文摘The extraction of spectral parameters is very difficult because of the limited energy resolution for NaI （TI） gamma-ray detectors. For statistical fluctuation of radioactivity under complex environment, some smoothing filtering methods are proposed to solve the problem. These methods include adopting method of arithmetic moving average, center of gravity, least squares of polynomial, slide converter of discrete funcion convolution etc. The process of spectrum data is realized, and the results are assessed in H/FWHM（ Peak High/Full Width at Half Maximum） and peak area based on the Matlab programming. The results indicate that different methods smoothed spectrum have respective superiority in different ergoregion, but the Gaussian function theory in discrete function convolution slide method is used to filter the complex y-spectrum on Embedded system nlatform, and the statistical fluctuation of y-snectrum filtered wall.
文摘铁路线路速度目标值的选择,直接影响铁路线路设计的其他主要技术标准的选择、车辆选型、设备配置、工程投资等。选择一种科学有效的模型,对速度目标值方案进行综合评价对铁路线路设计的后续工作具有重要意义。利用层次分析法原理建立速度目标值综合评价体系,引入CRITIC-G1法(Criteria Importance Though Intercrieria Correlation-Order Relation Analysis Method,CRITIC-G1)的综合赋权方法计算各评价指标的权重。采用基于灰色关联改进的TOPSIS(Technique for Order Preference by Similarity to an Ideal Solution,TOPSIS)多目标决策方法确定最优方案。以西安-江油段速度目标值方案比选为例验证模型的合理性,计算结果表明速度目标值为350km/h的方案最优,与工程实际相符。结果表明:本文提出的基于CRITIC-G1的综合评价方法,能够体现各评价指标间的差异性和相关性,同时也能体现主观经验的偏好性,是一种较为科学、合理的评价方法.
