時間序列挖掘算法在生產(chǎn)安全事故中的應(yīng)用研究
[Abstract]:The annual economic loss caused by safety problems in China accounts for about 6% of the total amount of GDP, which brings great losses to the country and the people, so it is very important to predict the accidents of production safety. The traditional analysis of production safety accidents mainly includes statistical analysis, regression model, grey model and so on, which is unfavorable to take measures to prevent accidents. This paper combines the theory of monadic time series and the theory of multivariate time series in the research of production safety accident data. It has some innovation in the application of the theory, and applies the time series prediction model to the prediction of production safety. In particular, the vector moving average autoregressive method of binary time series of multivariate time series is applied to production safety accidents. Taking the data of nearly 10 years as an example, the trend and influencing factors of accidents are analyzed from many aspects. To provide guidance and suggestions, timely production safety accidents to take measures. This paper mainly carried out a few aspects of the work: 1. The data are obtained from the official website of the State Safety Supervision Bureau, and the production safety accidents and their brief information are obtained by regular expression. Through the data preprocessing to the big accident, the data characteristic is displayed through the visualization. 2. 2. The ARIMA model of monadic time series and the cubic exponential smoothing model are compared with the data fitting and forecasting results of 15 years of production safety larger accident series, and the number of deaths in accidents, the number of deaths and the development trend are compared in terms of the number of accidents, the number of deaths, and the trend of development. The residual error of the unary time series prediction model is -21. 92, relative error 0. 266a higher accuracy and reliability than cubic exponential smoothing. This paper studies the theoretical basis of multivariate time series and applies it to the prediction of production safety accidents. Compared with the previous models, the relative error is 0.2452, which is more accurate. The binary time series of death and accident are analyzed, and its growth rate is used as time series analysis model to predict the value of less than 12 months. This paper combines qualitative analysis with quantitative prediction to predict production safety accidents. Qualitative analysis: the accident is divided into different types through the large accident brief information, among which the traffic accident type is the most; For the year analysis of major accidents, the turning point is 2005, before 2005, the major accidents are on the rise, and after 2005, the trend is decreasing year by year. In view of the region of large accidents, it is found that the major accidents are mainly in the southwest mountainous area and the geological unstable area. Quantitative analysis: through establishing exponential smoothing, univariate time series, multivariate time series model, adjusting model parameters, selecting the best model to predict the larger accident sequence. Get the trend of production safety accidents in the coming year. The countermeasures to prevent and reduce accidents are put forward in time through the trend to provide support for national macro-decision-making.
【學(xué)位授予單位】:北京郵電大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:X915.4;O211.61
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