Abstract: A digital mirroring method includes creating a digital model for each physical device of a plurality of physical devices located in a physical space. Once a related data of each physical device is obtained, the related data of each physical device is mapped to corresponding digital model.

Abstract: In a method for embedding user information in webpages, user information of a user who logs into a target website is obtained. The user information is converted into color values. The color values are embedded in a target webpage of the target website. If a webpage is leaked, a user who leaks the webpage can be traced.

Abstract: In a method for embedding user information in webpages, user information of a user who logs into a target website is obtained. The user information is converted into color values. The color values are embedded in a target webpage of the target website. If a webpage is leaked, a user who leaks the webpage can be traced.

Abstract: A digital mirroring method includes creating a digital model for each physical device of a plurality of physical devices located in a physical space. Once a related data of each physical device is obtained, the related data of each physical device is mapped to corresponding digital model.

Abstract: An offline mode user account authorization method includes obtaining an access privilege of a user account and setting an offline task access privilege of the user account according to the access privilege, retrieving user account information corresponding to a task to be executed from a preset task information comparison table when the task to be executed is implemented, determining whether the user account is online, executing the task to be executed with a user ID of the user account if the user account is online, and creating a super offline user account and assigning offline task access privilege of the user account to the super offline user account if the user account is not online. The implemented task to be executed is executed with the super offline user account.

Abstract: A collaborative document editing system includes a server and at least two user terminals communicatively coupled to the server through a network. The server distributes a collaborative editing task to the two user terminals. The collaborative editing task includes a document to be edited. The two user terminals send local operation records to the server. The server records the local operation records of the user terminals. The server receives an edit operation command from the two user terminals. The server adds the edit operation commands of the user terminals to an operation queue and sends the edit operation commands to the user terminals according to the operation queue. The user terminals receive the edit operation commands according to the operation queue and update the document according to the local operation record corresponding to the edit operation commands.

Abstract: An offline mode user account authorization method includes obtaining an access privilege of a user account and setting an offline task access privilege of the user account according to the access privilege, retrieving user account information corresponding to a task to be executed from a preset task information comparison table when the task to be executed is implemented, determining whether the user account is online, executing the task to be executed with a user ID of the user account if the user account is online, and creating a super offline user account and assigning offline task access privilege of the user account to the super offline user account if the user account is not online. The implemented task to be executed is executed with the super offline user account.

Abstract: A data privilege control method includes configuring user metadata, dynamically configuring user classification according to the user metadata, dynamically configuring data read and write privilege according to the user classification, receiving a user access request, obtaining the user attributes and determining the user classification according to the user attributes, determining whether the user has a data read and write privilege according to the user classification, and authorizing the user's data read and write operations when it is determined that the user has data read and write privilege. The user metadata includes a number of user attributes.