Abstract: A method for creating a virtual machine includes receiving a virtual machine creation request comprising parameter information of a virtual network interface card occupied by a to-be-created virtual machine, obtaining current resource usage information of the network interface card resource pools of at least one computing node, wherein the at least one computing node is deployed on a cloud platform, each computing node comprises a network interface card resource pool comprising physical network interface cards, determining a target computing node, in the at least one computing node based on the parameter information and the current resource usage information, and invoking the target computing node to create the virtual machine.

Abstract: A experimental device is specifically an annular water tank formed by a first arc-shaped water tank, a first special-shaped water tank, a second arc-shaped water tank and a second special-shaped water tank which are sequentially connected head to tail, and the outer perimeter is 70 m to 110 m, wherein the inner walls of both the first special-shaped water tank and the second special-shaped water tank are flat, both of the widths between the outer walls and the inner walls are gradually increased from the two ends to the middle, and water flow pushing equipment which are capable of enabling the maximum water flow velocity in the experimental device to reach a preset value are respectively placed in the first special-shaped water tank and the second special-shaped water tank.

Abstract: A experimental device is specifically an annular water tank formed by a first arc-shaped water tank, a first special-shaped water tank, a second arc-shaped water tank and a second special-shaped water tank which are sequentially connected head to tail, and the outer perimeter is 70 m to 110 m, wherein the inner walls of both the first special-shaped water tank and the second special-shaped water tank are flat, both of the widths between the outer walls and the inner walls are gradually increased from the two ends to the middle, and water flow pushing equipment which are capable of enabling the maximum water flow velocity in the experimental device to reach a preset value are respectively placed in the first special-shaped water tank and the second special-shaped water tank.

Abstract: A method for controlling the gate based on the habitat requirement for fish overwintering in rivers. According to the characteristics of biological habitat of the river and the habitat demand of fishes during overwintering, the method specifically comprises the steps of: firstly, determining candidate fishes for ecological flow calculation though fish resources investigating and historical data, and then screening out the target fish by adopting hierarchical analysis method; Secondly, establishing a quantitative response relationship curve between target fish physiological adaptions and water temperature, obtaining ecological water level which ensures the target fish overwintering safely according to the vertical temperature distribution, and establishing the relation between water depth and discharge using hydrodynamic model; finally, setting up a gate control system including a radar water level meter in the overwintering areas and an ecological water level management system in a gate control room.

Abstract: A method for controlling the gate based on the habitat requirement for fish overwintering in rivers. According to the characteristics of biological habitat of the river and the habitat demand of fishes during overwintering, the method specifically comprises the steps of: firstly, determining candidate fishes for ecological flow calculation though fish resources investigating and historical data, and then screening out the target fish by adopting hierarchical analysis method; Secondly, establishing a quantitative response relationship curve between target fish physiological adaptions and water temperature, obtaining ecological water level which ensures the target fish overwintering safely according to the vertical temperature distribution, and establishing the relation between water depth and discharge using hydrodynamic model; finally, setting up a gate control system including a radar water level meter in the overwintering areas and an ecological water level management system in a gate control room.