Abstract: Embodiments of a generative framework comprise cooperative learning of two generative flow models, in which the two models are iteratively updated based on the jointly synthesized examples. In one or more embodiments, the first flow model is a normalizing flow that transforms an initial simple density into a target density by applying a sequence of invertible transformations, and the second flow model is a Langevin flow that runs finite steps of gradient-based MCMC toward an energy-based model. In learning iterations, synthesized examples are generated by using a normalizing flow initialization followed by a short-run Langevin flow revision toward the current energy-based model. Then, the synthesized examples may be treated as fair samples from the energy-based model and the model parameters are updated, while the normalizing flow directly learns from the synthesized examples by maximizing the tractable likelihood. Also provided are both theoretical and empirical justifications for the embodiments.

Abstract: A method, server and storage medium for verifying a transaction using a smart card are disclosed. A server receives a transaction request to perform a transaction with a user of the smart card. The transaction request includes identification information and encrypted data extracted from the smart card, and transaction information. The server determines a user account linked to the identification information. The server performs a first verification process to authenticate the smart card by verifying that the smart card possesses a correct decryption key corresponding to the identification information. The server performs a second verification process to authenticate the smart card by verifying that the encrypted data extracted from the smart card encodes stored data corresponding to the respective user account linked to the identification information. If the first and the second verification processes are successful, the server processes the transaction in accordance with the transaction information.

Abstract: A computer-implement method of processing resource exchange information includes the following steps: obtaining a data package including a user card identifier and a social network application identifier from a mobile phone; establishing a correspondence between the user card identifier and the social network application identifier and storing the correspondence in the computer system; obtaining user card data and resource exchange information from a payment terminal, wherein the user card data includes the user card identifier; performing security verification to the user card data and obtaining the corresponding social network application identifier when the security verification succeeds; processing a resource transfer request according to the social network application identifier and the resource exchange information and generating corresponding processing state information; and returning the corresponding processing state information to the payment terminal.

Abstract: A method, server and storage medium for verifying a transaction using a smart card are disclosed. A server receives a transaction request to perform a transaction with a user of the smart card. The transaction request includes identification information and encrypted data extracted from the smart card, and transaction information. The server determines a user account linked to the identification information. The server performs a first verification process to authenticate the smart card by verifying that the smart card possesses a correct decryption key corresponding to the identification information. The server performs a second verification process to authenticate the smart card by verifying that the encrypted data extracted from the smart card encodes stored data corresponding to the respective user account linked to the identification information. If the first and the second verification processes are successful, the server processes the transaction in accordance with the transaction information.

Abstract: A method, server and storage medium for verifying a transaction using a smart card are disclosed. A server receives a transaction request to perform a transaction with a user of the smart card. The transaction request includes identification information and encrypted data extracted from the smart card, and transaction information. The server determines a user account linked to the identification information. The server performs a first verification process to authenticate the smart card by verifying that the smart card possesses a correct decryption key corresponding to the identification information. The server performs a second verification process to authenticate the smart card by verifying that the encrypted data extracted from the smart card encodes stored data corresponding to the respective user account linked to the identification information. If the first and the second verification processes are successful, the server processes the transaction in accordance with the transaction information.

Abstract: An input device includes an input module and a fixing module matching the input module. The input module is a sphere having a cavity, the input module includes a signal detection unit and a signal output unit, the signal detection unit and the signal output unit are placed in the cavity after being electrically connected, the signal detection unit is configured to generate a corresponding input signal according to a preset operation performed by a user on the input module, and the signal output unit is connected to an external terminal and configured to output the input signal to the terminal. The fixing module is configured to fix the input device on a preset flat surface.

Abstract: An input device includes an input module and a fixing module matching the input module. The input module is a sphere having a cavity, the input module includes a signal detection unit and a signal output unit, the signal detection unit and the signal output unit are placed in the cavity after being electrically connected, the signal detection unit is configured to generate a corresponding input signal according to a preset operation performed by a user on the input module, and the signal output unit is connected to an external terminal and configured to output the input signal to the terminal. The fixing module is configured to fix the input device on a preset flat surface.

Abstract: A computer-implement method of processing resource exchange information includes the following steps: obtaining a data package including a user card identifier and a social network application identifier from a mobile phone; establishing a correspondence between the user card identifier and the social network application identifier and storing the correspondence in the computer system; obtaining user card data and resource exchange information from a payment terminal, wherein the user card data includes the user card identifier; performing security verification to the user card data and obtaining the corresponding social network application identifier when the security verification succeeds; processing a resource transfer request according to the social network application identifier and the resource exchange information and generating corresponding processing state information; and returning the corresponding processing state information to the payment terminal.

Abstract: A method, server and storage medium for verifying a transaction using a smart card are disclosed. A server receives a transaction request to perform a transaction with a user of the smart card. The transaction request includes identification information and encrypted data extracted from the smart card, and transaction information. The server determines a user account linked to the identification information. The server performs a first verification process to authenticate the smart card by verifying that the smart card possesses a correct decryption key corresponding to the identification information. The server performs a second verification process to authenticate the smart card by verifying that the encrypted data extracted from the smart card encodes stored data corresponding to the respective user account linked to the identification information. If the first and the second verification processes are successful, the server processes the transaction in accordance with the transaction information.

Abstract: The present application discloses methods and devices for data transfer and particularly data transfer between mobile terminals and a display device. The display device may connect to a uniquely identified server based on a device identifier corresponding to the display device. In addition, the display device may connect to the server through a default connection setup embedded in the device identifier. Mobile terminals may be searched and identified by terminal identifiers so that the display device may establish communication channels with the mobile terminals. After adding the mobile terminals to the contact lists of the display device, different display regions of the display device may be designated to the mobile terminals so that the regions may display the digital contents sent from the mobile terminals to the display device. In addition, the regions may be further selected to display the digital contents in more detail.

Abstract: Methods, devices and systems for sharing information related to exercise/health activities are disclosed. A user terminal can acquire a device identifier associated with a health monitoring device, such as a monitoring wristband or a treadmill, through a communication program (e.g., an instant messaging application). The user terminal can communicate with a server of the communication program so that the server binds the device identifier with a user ID. The association of the user ID and the device identifier allows the user to share the health monitoring information from the health monitoring device with other users through the server. In addition, the connected users can participate in real-time competitions and share information related to the competition. The server also generates ranking lists or other sharing formats for the competition, improving user experience and making exercise and competition more attractive.

Abstract: A method is performed at a computer server for enabling voice communication between two terminals through IM service. Upon receiving a message from a remote computer, the message including an IM identifier of a callee terminal user and a mobile device identifier of the terminal, the computer system updates an entry for the callee terminal user in a database. Upon receiving a request from a caller terminal user at a caller terminal to start voice communication with the callee terminal user, the computer server identifies the entry that includes the IM identifier of the callee terminal user and sends a voice communication request to a service control point (SCP) in a switched telephone network. The SCP then returns an IP address and a port number of the callee terminal and launches a call request against the callee terminal. The computer server establishes a voice communication channel between the two terminals.

Abstract: A method is performed at a computer server for enabling voice communication between two terminals through IM service. Upon receiving a message from a remote computer, the message including an IM identifier of a callee terminal user and a mobile device identifier of the terminal, the computer system updates an entry for the callee terminal user in a database. Upon receiving a request from a caller terminal user at a caller terminal to start voice communication with the callee terminal user, the computer server identifies the entry that includes the IM identifier of the callee terminal user and sends a voice communication request to a service control point (SCP) in a switched telephone network. The SCP then returns an IP address and a port number of the callee terminal and launches a call request against the callee terminal. The computer server establishes a voice communication channel between the two terminals.

Abstract: The present application discloses methods and devices for data transfer and particularly data transfer between mobile terminals and a display device. The display device may connect to a uniquely identified server based on a device identifier corresponding to the display device. In addition, the display device may connect to the server through a default connection setup embedded in the device identifier. Mobile terminals may be searched and identified by terminal identifiers so that the display device may establish communication channels with the mobile terminals. After adding the mobile terminals to the contact lists of the display device, different display regions of the display device may be designated to the mobile terminals so that the regions may display the digital contents sent from the mobile terminals to the display device. In addition, the regions may be further selected to display the digital contents in more detail.