【摘要】：針對現(xiàn)有改進互信息爬山(MIHC)算法精度低、耗時長及簡化爬山(SHC)算法產(chǎn)生大量冗余邊的問題,提出一種新的結(jié)構(gòu)學(xué)習(xí)算法,即改進爬山(IHC)算法。通過計算互信息鏈得到貝葉斯初始結(jié)構(gòu),利用條件獨立性測試以及對孤立節(jié)點進行處理來加邊補充貝葉斯初始結(jié)構(gòu)得到完全結(jié)構(gòu),利用改進的爬山搜索算子對完全結(jié)構(gòu)進行搜索直到得出最優(yōu)結(jié)構(gòu)。將該算法與爬山(HC)算法、MIHC算法、SHC算法進行比較,仿真結(jié)果表明,IHC算法能夠得到較高準(zhǔn)確率的模型,時間開銷最小而且產(chǎn)生的冗余邊數(shù)遠遠少于SHC算法產(chǎn)生的冗余邊數(shù)。最后基于IHC算法,結(jié)合某回轉(zhuǎn)窯數(shù)據(jù)進行訓(xùn)練,得到了回轉(zhuǎn)窯工藝參數(shù)的故障診斷模型,對回轉(zhuǎn)窯的燒成帶溫度實現(xiàn)了較為準(zhǔn)確的故障診斷。
[Abstract]:Aiming at the problems of low precision, long time consuming and large number of redundant edges generated by the existing improved mutual information mountain climbing (MIHC) algorithm, a new structure learning algorithm, that is, the improved hill climbing (IHC) algorithm, is proposed to solve the problem of reducing the amount of redundant edges generated by the simplified hill climbing (SHC) algorithm. The Bayesian initial structure is obtained by computing the mutual information chain, and the complete structure is obtained by using conditional independence test and processing of isolated nodes to add edges to supplement the Bayesian initial structure. The improved mountain-climbing search operator is used to search the complete structure until the optimal structure is obtained. Compared with (HC) algorithm, MIHC algorithm and SHC algorithm, the simulation results show that the IHC algorithm can get a high accuracy model. The time cost is minimum and the number of redundant edges generated is far less than the number of redundant edges generated by the SHC algorithm. Finally, based on the IHC algorithm and the data of a rotary kiln, the fault diagnosis model of process parameters of rotary kiln is obtained, and the fault diagnosis of firing zone temperature of rotary kiln is realized accurately.
【作者單位】： 燕山大學(xué)信息科學(xué)與工程學(xué)院;燕山大學(xué)電氣工程學(xué)院;
【基金】：國家自然科學(xué)基金資助項目(51641609) 河北省自然科學(xué)基金資助項目(F2016203354)
【分類號】：TP18;TQ054

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