变分模态分解(Variational Mode Decomposition,VMD)算法的参数组合的选取会严重影响算法结果,导致滚动轴承故障特征难以提取。针对参数组合选取的问题,提出了一种基于灰狼优化算法(Grey Wolf Optimizer,GWO)寻参优化VMD的滚动轴承故障...变分模态分解(Variational Mode Decomposition,VMD)算法的参数组合的选取会严重影响算法结果,导致滚动轴承故障特征难以提取。针对参数组合选取的问题,提出了一种基于灰狼优化算法(Grey Wolf Optimizer,GWO)寻参优化VMD的滚动轴承故障特征提取方法。首先通过最大峭度法确定信号分解层数,并通过GWO算法寻优,得到最佳的参数组合。然后,通过GWO优化后的惩罚因子和模式数进行VMD分解,得到本征模态函数。最后对模态分量使用希尔伯特变换和归一化处理,进行包络分析,提取滚动轴承故障特征频率。展开更多
4-Amino-dimethyl-aniline hydrochloride is one of the main components of the wastewater from vanillin production plant. So it is used for the target contamination to be degraded by microorganism, electrochemical oxidat...4-Amino-dimethyl-aniline hydrochloride is one of the main components of the wastewater from vanillin production plant. So it is used for the target contamination to be degraded by microorganism, electrochemical oxidation and bio-electro reactor in this paper. We found out a economical, efficient and non-polluted methods for the treatment of wastewater from vanillin production plant. The results indicate that there are a lot of special microbes and bacteria eating 4-amino-dimethyl-aniline hydrochloride in the activated sludge after 20 days′ incubation, at the same time, a stable bio-filmed electrode was formed. Under the condition of 25 ℃, pH=6—7. The use of bio-electro reactor not only increased the biodegradability and decreased the electrical energy consumption, but also solved the problem which the second pollution of organic compounds containing chlorine in the process of indirect electrochemical degradation on the organic pollutants.展开更多
文摘变分模态分解(Variational Mode Decomposition,VMD)算法的参数组合的选取会严重影响算法结果,导致滚动轴承故障特征难以提取。针对参数组合选取的问题,提出了一种基于灰狼优化算法(Grey Wolf Optimizer,GWO)寻参优化VMD的滚动轴承故障特征提取方法。首先通过最大峭度法确定信号分解层数,并通过GWO算法寻优,得到最佳的参数组合。然后,通过GWO优化后的惩罚因子和模式数进行VMD分解,得到本征模态函数。最后对模态分量使用希尔伯特变换和归一化处理,进行包络分析,提取滚动轴承故障特征频率。
文摘4-Amino-dimethyl-aniline hydrochloride is one of the main components of the wastewater from vanillin production plant. So it is used for the target contamination to be degraded by microorganism, electrochemical oxidation and bio-electro reactor in this paper. We found out a economical, efficient and non-polluted methods for the treatment of wastewater from vanillin production plant. The results indicate that there are a lot of special microbes and bacteria eating 4-amino-dimethyl-aniline hydrochloride in the activated sludge after 20 days′ incubation, at the same time, a stable bio-filmed electrode was formed. Under the condition of 25 ℃, pH=6—7. The use of bio-electro reactor not only increased the biodegradability and decreased the electrical energy consumption, but also solved the problem which the second pollution of organic compounds containing chlorine in the process of indirect electrochemical degradation on the organic pollutants.
