Abstract: A method for arbitrating cluster includes: setting heartbeat between every two adjacent nodes in the cluster; in response to disconnection of heartbeat among nodes occurs, dividing the nodes into a plurality of sub-clusters, and determining whether the sub-cluster having a largest number of nodes is unique; in response to the sub-cluster having the largest number is not unique, selecting one node in the sub-clusters having the largest number of nodes, to make the selected nodes send a request of reservation to a logical volume of a third-party storage; in response to success of reservation of node, determining whether data for arbitrating in the logical volume of the third-party storage is valid; and in response to the data is invalid, writing information for arbitrating of the node of success into the logical volume, to make the sub-cluster, to which the node belongs, obtain a control right of the cluster.

Abstract: Provided are a cluster arbitration method and system based on heterogeneous storage, and a device and a storage medium.

Abstract: The process for coal separation includes two steps of size grading and oversize raw coal separating. A size range is obtained through size grading, then the obtained raw coal is separated by a sensor system, and coal briquettes with high impurity contents are blown into an impurity chamber through high-speed compressed air, thus improving the separating accuracy and efficiency. The system for coal separation includes a dry screening machine, an oversize raw coal conveying chute, a sensor system, a control system, nozzles and a flow division chamber. The tail end of the dry screening machine is connected with the charge end of the chute; the sensor system and the discharge end of the chute are correspondingly arranged; the flow division chamber is arranged below the chute; and the nozzles operated and controlled by the control system are arranged between the discharge end of the chute and the flow division chamber.