Abstract: A method for monitoring operations of cloud server through virtual machines is used in a virtual machine monitoring system with a central monitoring system, a cloud platform, virtual exchangers, and virtual machines. The central monitoring system sends an instruction to obtain to the cloud platform. The cloud platform transmits the instruction to the virtual machine through the virtual exchanger. The virtual machine searches for operation information and sends such information to the cloud platform by the virtual exchanger. The cloud platform transmits the operation information to the central monitoring system. The central monitoring system monitors and manages the operation information. A virtual machine operation monitoring device and a virtual machine monitoring system applying the method are also provided.

Abstract: A method for monitoring operations of cloud server through virtual machines is used in a virtual machine monitoring system with a central monitoring system, a cloud platform, virtual exchangers, and virtual machines. The central monitoring system sends an instruction to obtain to the cloud platform. The cloud platform transmits the instruction to the virtual machine through the virtual exchanger. The virtual machine searches for operation information and sends such information to the cloud platform by the virtual exchanger. The cloud platform transmits the operation information to the central monitoring system. The central monitoring system monitors and manages the operation information. A virtual machine operation monitoring device and a virtual machine monitoring system applying the method are also provided.

Abstract: A method for improving manner of display of surveillance video to extract components or types of components for independent display from the video. The displayable components are divided into at least one subject. A repeating displayed list is created corresponding to the at least one component or type of component. The videos corresponding thereto can be displayed in turn based on the display list in response to a play instruction from user. An electronic device and a computer readable storage medium applying the method are also provided.

Abstract: In a method to connect a server to a network device, the method generates a communication process to connect the server to a network device. The method separates an independent sub process form the communication process to connect the server to the network device, which is accompanied by an automatic end of the communication process. The method further creates a communication connection between the server and the network device.

Abstract: An electronic device for managing an electronic map provides a service for accessing the electronic map of a first security system. The electronic device further includes an abstract electronic map layer embedded in the first security system and a second security system. The abstract electronic map layer embeds an uniform resource locator and a loading scheme of the electronic map in a first application programming interface (API) of the first security system and a second API of the second security system.