卡纳塔克邦Ramanagaram和Siddlaghatta市场桑蚕茧价格建模与预测

G. R. Halagundegowda
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引用次数: 1

摘要

准确预测蚕茧价格对规划和政策制定至关重要。采用自回归综合移动平均线(ARIMA)方法对卡纳塔克邦政府蚕茧市场(GCM)、Ramanagaram和Siddlaghatta的桑茧价格进行了预测研究。根据自相关函数和部分自相关函数确定合适的模型,并根据Ljung-Box Q统计量和归一化BIC值判断模型的充分性。两个市场的价格预测值在不同时期均呈下降趋势。利用决定系数、均方根误差(RMSE)、平均绝对百分比误差(MAPE)、平均绝对误差(MAE)和贝叶斯信息准则(BIC)对模型的预测性能进行了评估,发现拟合的ARIMA模型在预测两个市场的桑茧价格方面都是更好的模型。
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Modeling and Forecasting of Mulberry Cocoon Prices in Ramanagaram and Siddlaghatta Markets of Karnataka
Accurate forecasting of prices of mulberry cocoons (CB)is essentialfor planning and policy purposes. A study had been taken up to forecast the prices of mulberry cocoons (CB) in Government Cocoon Market (GCM), Ramanagaram and Siddlaghatta of Karnataka by employing Auto Regressive Integrated Moving Average (ARIMA) method. A suitable model was identified based on the autocorrelation function and partial autocorrelation function and the adequacy of the model was judged based on the values of Ljung-Box Q statistics and Normalized BIC. The forecasted values of price showed decreased trend in both the markets across the periods. The forecasting performance of the model was assessed for both the markets using coefficient of determination, Root Mean Square Error (RMSE), Mean Absolute Percentage Error (MAPE), Mean Absolute Error (MAE) and Bayesian Information Criteria (BIC) and found thatthe fitted ARIMA model was found to be better model in forecasting the prices of mulberry cocoons in both themarkets.
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