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基于混合Gamma分布单个观测的可靠性函数无偏估计

针对小样本甚至单样本情况下的疲劳寿命分布特征研究,给出了混合Gamma分布的概率密度函数可定义的  (本文共10页) 阅读全文>>

《Nuclear Science and Techniques》2020年01期
Nuclear Science and Techniques

Attenuation coefficients of gamma and X-rays passing through six materials

The aim of this study was to determine the attenuation of gamma and X-rays with different energies caused by passage through different materials. To this end,different materials with a range of atomic numbers were chosen to measure gamma and X-ray attenuation coefficients and to explore the mechanisms of interaction of gamma and X-rays with matter of various kinds. It is shown that the attenuation coefficients first ...  (本文共6页) 阅读全文>>

《Nuclear Science and Techniques》2020年06期
Nuclear Science and Techniques

An investigation of gamma ray mass attenuation from 80.1 to 834.86 keV for fabric coating pastes used in textile sector

In the present study, we investigate several textile coating pastes used in the market based on their radiation protection capability for gamma rays. The gamma ray mass absorption coefficients of some coating pastes doped with antimony, boron and silver elements have been investigated. It has been determined that the gamma ray mass attenuation coefficient decreases rapidly as the energ...  (本文共8页) 阅读全文>>

《科研管理》2020年05期
科研管理

基于Gamma的低碳港口形成机理研究——以日照港为例

港口是耗能和温室气体排放大户,低碳港口建设日益受到重视。本研究以日照港为例,揭示我国低碳港口形成机理。首先,采集了日照港数据测算单位货物吞吐量碳排放量,将1987-2017年日照港低碳发展划分三个阶段,并剖析各阶...  (本文共10页) 阅读全文>>

《Nuclear Science and Techniques》2019年07期
Nuclear Science and Techniques

Analyzing the transient effects of ~(60)Co gamma rays in a CIS by Monte Carlo method

The objective of this work is to analyze the transient effects of ~(60)Co gamma rays in the CMOS image sensor(CIS) using the Monte Carlo method, based on Geant4. The track, energy spectrum, and angle of produced electrons when gamma rays traversed a silicon or...  (本文共7页) 阅读全文>>

《高校应用数学学报A辑》2019年04期
高校应用数学学报A辑

Gamma恒定应力加速寿命试验的统计分析

证明了基于恒定应力加速寿命试验数据Gamma模型参数的最大似然估计在一定条件下存在,进而导出了Gamma模型参数的备择估计.利用Cornish-Fisher...  (本文共13页) 阅读全文>>