Abstract: The present application discloses an optoelectronic device, including an anode, a hole transport layer disposed on the anode, a quantum dot light-emitting layer disposed on the hole transport layer, and a cathode disposed on the quantum dot light-emitting layer; the quantum dot light-emitting layer includes a quantum dot material in a core-shell structure, and a difference between a top energy level of a valence band of an outer shell layer material of the quantum dot material and that of a hole transport material in the hole transport layer is greater than or equal to 0.5 eV.

Abstract: The invention proposes a virtual machine abnormity recovering method in distributed environment, comprising: running an independent computing assembly on each physical machine on which a virtual machine resides, wherein the computing assembly periodically reports the current running state of the corresponding physical machine to a state database; periodically polling the state database by a highly available controller so as to check the running state of all the physical machines in a physical machine group under the control of the highly available controller; and executing subsequent abnormity processing operation if the running state of only one physical machine in the physical machine group is abnormal so as to ensure that virtual machines on the physical machine whose running state is abnormal continues running normally.

Abstract: The invention proposes a virtual machine abnormity recovering method in distributed environment, comprising: running an independent computing assembly on each physical machine on which a virtual machine resides, wherein the computing assembly periodically reports the current running state of the corresponding physical machine to a state database; periodically polling the state database by a highly available controller so as to check the running state of all the physical machines in a physical machine group under the control of the highly available controller; and executing subsequent abnormity processing operation if the running state of only one physical machine in the physical machine group is abnormal so as to ensure that virtual machines on the physical machine whose running state is abnormal continues running normally.