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Environmental factor, as an important parameter in reliability assessment, has been an important issue in the reliability engineering research. The definition of environmental factor for success-failure type data is the unreliability ratio of products between two different environments. When the experimental data obtained were zero-failure data, the value of denominator would be zero when using the...
This paper investigated the application of Bayes' theorem in life distribution. The uncertainty of the model itself was rarely cared about Bayesian theory. So probability distribution model uncertainty and structural parameter uncertainty was researched through Bayes' theorem. This paper developed the fatigue life distribution mode of turbine blade. Firstly, find the best model by quantification of...
This paper mainly studies the creep characteristic of nickel-base superalloy GH4169 under high temperature. From the perspective of modeling methods, based on the continuum damage mechanics, a creep life prediction model was proposed to predict the creep life of metal materials in both uniaxial stress state and multiaxial stress state, and experimental verification is done. Moreover, from the perspective...
According to the shortcomings of the nonlinear cumulative damage models which are based on material physical properties degradation, these models ignored the effects of load interaction, but the effects of load interaction really play a very important role on fatigue damage by studying the theories accounting for load interaction effects. In this paper, a new model is proposed to consider the effects...
Many structures are subjected to variable amplitude loading in engineering practice. The foundation of fatigue life prediction under variable amplitude loading is how to deal with the fatigue damage accumulation in the case of two-level loading. A non-linear fatigue damage accumulation model which can explain the influence of loading sequences was proposed in earlier literature, but the model cannot...
Outlier data mining can often find some potential useful information, this article proposes a outlier mining algorithm for time series data. The algorithm first uses DWT (Discrete Wavelet Transform) to transform the time series data to frequency domain from time domain and makes the time series data map into the points in multidimensional space. Then the algorithm uses distanced-based method to mine...
Based on coal administrative information opening in Shanxi Province, the paper reviews the related domestic and foreign studies on the effect of e-government information opening, collects a large number of data through the questionnaires from the view of negative effects diffusion and information communication, deduces the primary influence factors of negative effects of e-government information opening...
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