Application study of hierarchical linear models in carbon steel corrosion in soils
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摘要: 針對材料在自然土壤環境中的腐蝕預測問題,提出應用多層線性模型對材料的腐蝕規律進行研究.多層線性模型是分析具有層次結構數據的新型統計技術,對于地區間土壤腐蝕規律的差異性特點和單地區實驗觀測樣本不足的問題,可以為不同的區域分別建立腐蝕率模型,使模型假設與實際更為吻合.以碳鋼在土壤中的腐蝕數據為研究對象,建立了腐蝕率的多層線性模型.實驗驗證了該模型可以準確地擬合和預測碳鋼在土壤的腐蝕率變化,優于指數平滑算法和差分自回歸移動平均算法.Abstract: Aiming at the problem of materials corrosion prediction in the natural soil environment, hierarchical linear modeling was used to study the corrosion rules of materials. The hierarchical linear model is a new statistical technique for hierarchical data analysis. Different models for every region can be established to fit regional soil corrosion characteristics and solve the problem of small samples in a specific region, which makes modeling assumptions more consistent with actual situations. A hierarchical linear corrosion model was built with carbon steel corrosion data in soils being the object of study. The test demonstrates that the model can precisely describe and predict the corrosion rate of carbon steel in soils, and it is superior to exponential smoothing algorithm and differential autoregressive integrated moving average (ARIMA) algorithm.
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Key words:
- carbon steel /
- steel corrosion /
- soils /
- corrosion rate /
- hierarchical linear model
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