Abstract: In one embodiment, a method includes receiving, at a stateless key service and from an application associated with a particular user, a user password specific to a particular user/application combination. The method further includes receiving, at the stateless key service and from a wallet service, a wallet salt associated with the user/application combination. The method includes generating, by the stateless key service, an encryption key specific to the user/application combination, based on the user password and the wallet salt. The method includes receiving, at the stateless key service and from the wallet service, an encrypted wallet key associated with the user/application combination; and generating, by the stateless key service, a wallet key specific to the user/application combination, based on the encrypted wallet key and the encryption key. The method includes signing, at the stateless key service, a blockchain transaction using the wallet key.

Abstract: This disclosure discloses a fish-passing system and a fish-passing method with tourist ornamental function, belonging to the technical field of water conservancy and hydropower ecological protection. The system comprises a dam, a Ferris wheel, a water supplement component, and a central controller (9). The upstream of the dam is equipped with a fish-release chute, and one end of the fish-release chute extends into the water body of the dam reservoir. The downstream of the dam is equipped with a fish passage transfer mechanism, and the fish passage transfer mechanism is connected to the downstream water body of the dam through a fish passage. The Ferris wheel is located between the fish passage transfer mechanism and the fish-release chute, and a number of human-ascending mechanisms (8) are evenly arranged on the Ferris wheel.

Abstract: This disclosure discloses a fish-passing system and a fish-passing method with tourist ornamental function, belonging to the technical field of water conservancy and hydropower ecological protection. The system comprises a dam, a Ferris wheel, a water supplement component, and a central controller. The upstream of the dam is equipped with a fish-release chute, and one end of the fish-release chute extends into the water body of the dam reservoir. The downstream of the dam is equipped with a fish passage transfer mechanism, and the fish passage transfer mechanism is connected to the downstream water body of the dam through a fish passage. The Ferris wheel is located between the fish passage transfer mechanism and the fish-release chute, and a number of fish-carrying and human-ascending mechanisms are evenly arranged on the Ferris wheel.

Abstract: The present disclosure provides a method and apparatus for uploading and acquiring features of wireless signals. The method for acquiring features is applied to a service end and includes: acquiring a signal feature set of wireless signals detected by a delivery party in an execution process of at least one delivery service, where delivered objects corresponding to the at least one delivery service are from a same pick-up place; identifying a target feature subset corresponding to an object pick-up stage in the signal feature set, wherein the object pick-up stage is a stage of the execution process after the delivery party arrives at the pick-up place and before the delivery party leaves the pick-up place; based on the target feature subset, determining signal features of wireless signals corresponding to the pick-up place.

Abstract: A display module includes a display panel, a first backplate, a super clear foam (SCF) assembly and a reinforcement plate. The first backplate is disposed on a side of a display panel opposite to a light emission surface. The SCF assembly and the reinforcement plate are disposed on a side of the first backplate opposite to the display panel. A receiving slot is defined in a side of the SCF assembly opposite to display panel. At least one part of the reinforcement plate is received in the receiving slot, and a driver chip is located on a side of the reinforcement plate opposite to the display panel.

Abstract: A circuit includes: a first electrical interface including a first pin, a resistor module, an alternating current signal source, a voltage detection module, and a controller. One end of the resistor module is electrically connected to the first pin. The alternating current signal source is electrically connected to the other end of the resistor module, and configured to generate an alternating current detection signal. The voltage detection module is connected to the first pin, and configured to detect a maximum voltage value and a minimum voltage value that are on the first pin within a period of the alternating current detection signal. The controller is separately connected to the alternating current signal source and the voltage detection module, and configured to, when a difference between the maximum voltage value and the minimum voltage value is less than a first threshold, determine that water enters the first electrical interface.

Abstract: A flexible circuit board assembly and a flexible display device include a first flexible circuit board, a T-shaped flexible circuit board, and a second flexible circuit board. The first flexible circuit board and the second flexible circuit board are located on a top of the T-shaped flexible circuit board and are coplanar with the T-shaped flexible circuit board. Two ends of a top of the T-shaped flexible circuit board are connected respectively to the first flexible circuit board and the second flexible circuit board perpendicularly.

Abstract: A display module includes a display panel, a first backplate, a super clear foam (SCF) assembly and a reinforcement plate. The first backplate is disposed on a side of a display panel opposite to a light emission surface. The SCF assembly and the reinforcement plate are disposed on a side of the first backplate opposite to the display panel. A receiving slot is defined in a side of the SCF assembly opposite to display panel. At least one part of the reinforcement plate is received in the receiving slot, and a driver chip is located on a side of the reinforcement plate opposite to the display panel.

Abstract: A browsing history associated with a user of a client device is received from the client device. One or more keywords associated with a target audience for a variant of a web page are received from a content provider system. A score is determined for the user based on the browsing history for the user and the one or more keywords associated with the target audience. The user is identified as part of the target audience based on the score for the user satisfying a score threshold. The variant of the web page is caused to be presented at the client device associated with the user.

Abstract: A flexible circuit board assembly and a flexible display device include a first flexible circuit board, a T-shaped flexible circuit board, and a second flexible circuit board. The first flexible circuit board and the second flexible circuit board are located on a top of the T-shaped flexible circuit board and are coplanar with the T-shaped flexible circuit board. Two ends of a top of the T-shaped flexible circuit board are connected respectively to the first flexible circuit board and the second flexible circuit board perpendicularly.

Abstract: A circuit includes: a first electrical interface including a first pin, a resistor module, an alternating current signal source, a voltage detection module, and a controller. One end of the resistor module is electrically connected to the first pin. The alternating current signal source is electrically connected to the other end of the resistor module, and configured to generate an alternating current detection signal. The voltage detection module is connected to the first pin, and configured to detect a maximum voltage value and a minimum voltage value that are on the first pin within a period of the alternating current detection signal. The controller is separately connected to the alternating current signal source and the voltage detection module, and configured to, when a difference between the maximum voltage value and the minimum voltage value is less than a first threshold, determine that water enters the first electrical interface.

Abstract: Embodiments are directed to predicting the health of a computer node using health report data and to proactively handling failures in computer network nodes. In an embodiment, a computer system monitors various health indicators for multiple nodes in a computer network. The computer system accesses stored health indicators that provide a health history for the computer network nodes. The computer system then generates a health status based on the monitored health indicators and the health history. The generated health status indicates the likelihood that the node will be healthy within a specified future time period. The computer system then leverages the generated health status to handle current or predicted failures. The computer system also presents the generated health status to a user or other entity.

Abstract: A browsing history associated with a user of a client device is received from the client device. One or more keywords associated with a target audience for a variant of a web page are received from a content provider system. A score is determined for the user based on the browsing history for the user and the one or more keywords associated with the target audience. The user is identified as part of the target audience based on the score for the user satisfying a score threshold. The variant of the web page is caused to be presented at the client device associated with the user.

Abstract: Embodiments are directed to predicting the health of a computer node using health report data and to proactively handling failures in computer network nodes. In an embodiment, a computer system monitors various health indicators for multiple nodes in a computer network. The computer system accesses stored health indicators that provide a health history for the computer network nodes. The computer system then generates a health status based on the monitored health indicators and the health history. The generated health status indicates the likelihood that the node will be healthy within a specified future time period. The computer system then leverages the generated health status to handle current or predicted failures. The computer system also presents the generated health status to a user or other entity.

Abstract: Embodiments are directed to predicting the health of a computer node using health report data and to proactively handling failures in computer network nodes. In an embodiment, a computer system monitors various health indicators for multiple nodes in a computer network. The computer system accesses stored health indicators that provide a health history for the computer network nodes. The computer system then generates a health status based on the monitored health indicators and the health history. The generated health status indicates the likelihood that the node will be healthy within a specified future time period. The computer system then leverages the generated health status to handle current or predicted failures. The computer system also presents the generated health status to a user or other entity.

Abstract: Embodiments are directed to predicting the health of a computer node using health report data and to proactively handling failures in computer network nodes. In an embodiment, a computer system monitors various health indicators for multiple nodes in a computer network. The computer system accesses stored health indicators that provide a health history for the computer network nodes. The computer system then generates a health status based on the monitored health indicators and the health history. The generated health status indicates the likelihood that the node will be healthy within a specified future time period. The computer system then leverages the generated health status to handle current or predicted failures. The computer system also presents the generated health status to a user or other entity.

Abstract: Embodiments are directed to predicting the health of a computer node using health report data and to proactively handling failures in computer network nodes. In an embodiment, a computer system monitors various health indicators for multiple nodes in a computer network. The computer system accesses stored health indicators that provide a health history for the computer network nodes. The computer system then generates a health status based on the monitored health factors and the health history. The generated health status indicates the likelihood that the node will be healthy within a specified future time period. The computer system then leverages the generated health status to handle current or predicted failures. The computer system also presents the generated health status to a user or other entity.

Abstract: A database associated with a primary database cluster may be replicated in a backup database cluster located in a different location in order to provide a highly-available fault tolerant database service. The databases are reconciled through a cluster management module distributed in each database cluster. The cluster management module uses a set of reconciliation data structures to track locally the reconciled states of each database in each database cluster, the operations made locally to the databases in each database cluster, and the author of the operations. The cluster management module in each database cluster engages in a stateless messaging protocol using the set of reconciliation data structures to determine whether or not the databases may be reconciled.

Abstract: Embodiments are directed to predicting the health of a computer node using health report data and to proactively handling failures in computer network nodes. In an embodiment, a computer system monitors various health indicators for multiple nodes in a computer network. The computer system accesses stored health indicators that provide a health history for the computer network nodes. The computer system then generates a health status based on the monitored health factors and the health history. The generated health status indicates the likelihood that the node will be healthy within a specified future time period. The computer system then leverages the generated health status to handle current or predicted failures. The computer system also presents the generated health status to a user or other entity.

Abstract: Embodiments are directed to predicting the health of a computer node using health report data and to proactively handling failures in computer network nodes. In an embodiment, a computer system monitors various health indicators for multiple nodes in a computer network. The computer system accesses stored health indicators that provide a health history for the computer network nodes. The computer system then generates a health status based on the monitored health factors and the health history. The generated health status indicates the likelihood that the node will be healthy within a specified future time period. The computer system then leverages the generated health status to handle current or predicted failures. The computer system also presents the generated health status to a user or other entity.