In this work, the effects of injecting an evaporating liquid jet into solid-gas flow are experimentally investigated. A new model （SHED model） and a supplementary model （spray model） have also been proposed to inv...In this work, the effects of injecting an evaporating liquid jet into solid-gas flow are experimentally investigated. A new model （SHED model） and a supplementary model （spray model） have also been proposed to investigate some flow-field characteristics in three-phase fluidized bed with the mean relative error 4.3% between model and measured results. Some experiments were conducted to study the influences of flow-field parameters such as liquid volumetric flow rate, injection velocity, jet angle and gas superficial velocity as well as solid mass flux on the jet penetration depth （JPD）. In addition, independent variables were experimentally employed to propose two empirical correlations for JPD by using multiple regression method and spray cone angle （SCA） by using dimensional analysis technique. The mean relative errors between the JPD and SCA correlations versus ex- perimental data were 7.5% and 3.9%, respectively. In addition, in order to identify the variable effect, a parametric study was carried out. Applying the proposed model can avoid direct use of expensive devices to measureJPD and to nredict dronlet size.展开更多
针对传统的模糊C均值聚类算法(Fuzzy C-Means,FCM)对处理月亮型数据表现欠佳的问题,提出一种基于模糊类中心点的近邻点扩展聚类算法(Nearest Neighbor Extended clustering algorithm based on Fuzzy class center,NNE-FC)。算法首先不...针对传统的模糊C均值聚类算法(Fuzzy C-Means,FCM)对处理月亮型数据表现欠佳的问题,提出一种基于模糊类中心点的近邻点扩展聚类算法(Nearest Neighbor Extended clustering algorithm based on Fuzzy class center,NNE-FC)。算法首先不断迭代聚类中心点以及“隶属度”,直到“隶属度”不再发生较大变化,得到最佳的聚类中心,然后通过聚类中心点选择最近的数据点进行扩展,以聚类中心点到最近邻点的距离为半径,将邻域内不小于Minpts的数据点进行邻域扩展,将扩展的对象划分到同一簇内,最终得到聚类结果。通过实验研究验证,改进后的算法可以将月亮型数据集成功划分为不同密度的簇。展开更多
文摘In this work, the effects of injecting an evaporating liquid jet into solid-gas flow are experimentally investigated. A new model （SHED model） and a supplementary model （spray model） have also been proposed to investigate some flow-field characteristics in three-phase fluidized bed with the mean relative error 4.3% between model and measured results. Some experiments were conducted to study the influences of flow-field parameters such as liquid volumetric flow rate, injection velocity, jet angle and gas superficial velocity as well as solid mass flux on the jet penetration depth （JPD）. In addition, independent variables were experimentally employed to propose two empirical correlations for JPD by using multiple regression method and spray cone angle （SCA） by using dimensional analysis technique. The mean relative errors between the JPD and SCA correlations versus ex- perimental data were 7.5% and 3.9%, respectively. In addition, in order to identify the variable effect, a parametric study was carried out. Applying the proposed model can avoid direct use of expensive devices to measureJPD and to nredict dronlet size.
文摘针对传统的模糊C均值聚类算法(Fuzzy C-Means,FCM)对处理月亮型数据表现欠佳的问题,提出一种基于模糊类中心点的近邻点扩展聚类算法(Nearest Neighbor Extended clustering algorithm based on Fuzzy class center,NNE-FC)。算法首先不断迭代聚类中心点以及“隶属度”,直到“隶属度”不再发生较大变化,得到最佳的聚类中心,然后通过聚类中心点选择最近的数据点进行扩展,以聚类中心点到最近邻点的距离为半径,将邻域内不小于Minpts的数据点进行邻域扩展,将扩展的对象划分到同一簇内,最终得到聚类结果。通过实验研究验证,改进后的算法可以将月亮型数据集成功划分为不同密度的簇。
