贵州林业科技
貴州林業科技
귀주임업과기
GUIZHOU FORESTRY SCIENCE AND TECHNOLOGY
2012年
1期
14-17
,共4页
白桦%生长轮密度%时间序列分析%ARIMA模型
白樺%生長輪密度%時間序列分析%ARIMA模型
백화%생장륜밀도%시간서렬분석%ARIMA모형
Betula platyphylla%Time-series analysis%Density of wood growth ring%ARIMA model
为进一步提高木材的实际应用价值,并为森林资源经营提供理论支持,对兴安白桦木材生长轮密度的径向变异进行研究。采集兴安白桦试样21株,对其生长轮密度的径向变化规律进行时间序列分析,依据最小信息量AIC原则,选择ARIMA(O,1,1)为最优模型;白噪声检验结果表明,残差序列为白噪声序列,模型诊断通过;序列预测值与实测值相对误差在10%之内,模型获得较好的预测效果。
為進一步提高木材的實際應用價值,併為森林資源經營提供理論支持,對興安白樺木材生長輪密度的徑嚮變異進行研究。採集興安白樺試樣21株,對其生長輪密度的徑嚮變化規律進行時間序列分析,依據最小信息量AIC原則,選擇ARIMA(O,1,1)為最優模型;白譟聲檢驗結果錶明,殘差序列為白譟聲序列,模型診斷通過;序列預測值與實測值相對誤差在10%之內,模型穫得較好的預測效果。
위진일보제고목재적실제응용개치,병위삼림자원경영제공이론지지,대흥안백화목재생장륜밀도적경향변이진행연구。채집흥안백화시양21주,대기생장륜밀도적경향변화규률진행시간서렬분석,의거최소신식량AIC원칙,선택ARIMA(O,1,1)위최우모형;백조성검험결과표명,잔차서렬위백조성서렬,모형진단통과;서렬예측치여실측치상대오차재10%지내,모형획득교호적예측효과。
In order to further improve the applicable value of the wood, time series analysis of the density of wood growth ring for Betula platyphylla Suk. was studied. To do this,21 sample trees were col- lected and analyzed by selecting the ARIMA (0, 1, 1) as the best model via AIC criterion. The result showed that the residuals were white noise sequence, and the average relative error of the prediction data was within 10%, indicating that the model had a good prediction result.