Abstract: A method, device, equipment for user grouping, and a non-transitory computer-readable storage medium are provided, which are applicable to the field of medical technology. The method includes the following. Net benefits of multiple users in a target project are obtained. According to the net benefits of the multiple users in the target project and a solution of the target project, a net-benefit coefficient corresponding to the solution is determined. For each grouping variable of the target project, a fluctuation value corresponding to the grouping variable is determined according to the net-benefit coefficient. According to a grouping variable with the largest fluctuation value, the multiple users are divided into multiple user groups. For each user group obtained by division, users in the user group are divided according to a fluctuation value corresponding to each grouping variable of the target project, until a user group meeting a preset condition is obtained.

Abstract: A vehicle includes charger contactors configured to selectively electrically couple terminals for connecting to a charger to corresponding terminals of a high-voltage bus. The vehicle includes a precharge contactor configured to selectively couple a terminal of a battery to the high-voltage bus through an impedance element. The vehicle includes a controller programmed to command the charger contactors to an open state for a drive cycle and command the precharge contactor to close at a start of the drive cycle and, responsive to a voltage across the terminals for connecting to the charger changing from being less than a first predetermined voltage immediately prior to the precharge contactor being closed to being greater than a second predetermined voltage at a completion of precharging, inhibit vehicle operation and disconnect the battery from the high-voltage bus.

Abstract: A method for adjusting brightness of a display screen includes: in response to a brightness adjustment trigger operation, determining a target brightness level of the display screen based on a current brightness level of the display screen; obtaining a corresponding physical brightness and a corresponding display coefficient based on the target brightness level, wherein the display coefficient is smaller than 1, and the physical brightness is included in a physical brightness range in high brightness mode of the display screen; and controlling the display screen to display at a target display brightness based on the obtained physical brightness and the obtained display coefficient.

Abstract: A liquid cooling radiator based on a working medium capable of liquid-liquid phase separation includes a cooling fan, a micro liquid pump, a mixing pipe and a heat exchanger which are connected in sequence via a plastic tube. The liquid cooling radiator uses a solution capable of liquid-liquid phase separation at a lower critical separation temperature as a working medium, and is sealed after filling the solution into pipelines of the liquid cooling radiator. By replacing a working medium of the active CPU liquid cooling radiator, a heat dissipation performance in a limited space under a condition of a same pump power consumption, is greatly improved, a viscosity of the working medium in a heat-carrying state is reduced to decrease a flow resistance, which realizes both an enhancement of heat transfer and a reduction of flow resistance.

Abstract: Described herein are systems and methods of converting media dimensions. A device may identify a set of frames from a video in a first orientation as belonging to a scene. The device may receive a selected coordinate on a frame of the set of frames for the scene. The device may identify a first region within the frame including a first feature corresponding to the selected coordinate and a second region within the frame including a second feature. The device may generate a first score for the first feature and a second score for the second feature. The first score may be greater than the second score based on the first feature corresponding to the selected coordinate. The device may crop the frame to include the first region and the second region within a predetermined display area comprising a subset of regions of the frame in a second orientation.

Abstract: The present application discloses interaction method, system, and device for information. After recognizing a non-transparent shielding object or a second device, a first device with a light-sensing screen provided in the embodiments of the present application transmits shielded screen information to the second device for processing. One example is that the second device sends an operation instruction to the first device with a light-sensing screen according to a use scenario of a user, to change the screen information stored or/and displayed in the first device with a light-sensing screen. In this way, Interaction for information according to user requirements based on a photosensitive recognition technology between different devices may be implemented according to this application.

Abstract: Implementations of this specification provide signature verification methods and apparatuses for a blockchain ledger. An example method includes receiving by a server, a signature verification instruction that comprises a verification object parameter and a hash value. The verification object parameter includes a third-party parameter, a platform parameter, or a time service certificate parameter, the verification object parameter indicates a type of a to-be-verified object, and the server is configured to store data by using the blockchain ledger. The server obtains the to-be-verified object based on the verification object parameter and the hash value. The type of the to-be-verified object includes a third-party digital signature, a server digital signature, or a time service certificate. The server sends the to-be-verified object to a client for verification by the client.

Abstract: A process for producing a surfactant having two head groups and a single tail group per molecule, including steps of: producing a compound of Formula (1) from ethanol and carbon disulfide; producing a compound of Formula (2) from a carboxylic acid and bromine; producing a compound of Formula (3) from the compound of Formula (2) and methanol; producing a compound of Formula (4) from the compound of Formula (1) and the compound of Formula (3); and producing a compound of Formula (5) from the compound of Formula (4) by a direct oxidation process or by a peracid oxidation process. The surfactant produced by the process has lower critical micelle concentration and enables a lower surface tension of a liquid as compared with prior surfactants with two head groups per molecule, thereby enabling the amount of surfactant required and thus the cost to be substantially reduced.

Abstract: Embodiments of the present disclosure relate to generation of natural language expression variants. In an embodiment, a computer-implemented method is disclosed. According to the method, a structured expression is determined for a source expression in a natural language by replacing a source key entity in the source expression with a predetermined symbol. At least one template structured expression is selected from a set of template structured expressions based on respective similarities between the structured expression and respective template structured expressions in the set. Each of the set of template structured expressions comprises the predetermined symbol to represent a key entity. At least one variant expression is generated for the source expression by replacing the predetermined symbol in the at least one selected template structured expression with the source key entity. In other embodiments, a system and a computer program product are disclosed.

Abstract: Disclosed herein are methods, systems, and apparatus, including computer programs encoded on computer storage media, for managing blockchain-based centralized ledger systems. One of the methods includes: transmitting a timestamp request for a to-be-timestamped block in a blockchain to a trust time server by a ledger server in a centralized ledger system that stores data in the blockchain, the trust time server being associated with a trust time authority and independent from the centralized ledger system, the blockchain including a plurality of blocks storing transaction data, receiving a timestamp and associated signature for the to-be-timestamped block from the trust time server by the ledger server, and storing information of the timestamp and the associated signature for the to-be-timestamped block in the blockchain by the ledger server.

Abstract: Implementations of this specification provide service identifier-based data indexing. An example method performed by a data indexing apparatus of a centralized database service provider that stores data by using a blockchain-type ledger includes obtaining a service identifier and a service label of a data record, the service identifier uniquely identifying a service attribute of the data record, and the service label representing a type of the data record; determining location information of the data record in the blockchain-type ledger, the location information including a block height of a data block that includes the data record, and a positional offset of the data record in the data block that includes the data record; establishing a mapping relationship among the service identifier, the service label, and the location information; and writing the mapping relationship into an index for which a primary key is the service identifier.

Abstract: Disclosed herein are methods, systems, and apparatus, including computer programs encoded on computer storage media, for managing transaction requests in ledger systems.

Abstract: Disclosed are a wireless communication device and a wireless communication method. According to one embodiment, a wireless communication device for a base station side comprises a transceiver and one or more processors. The processor is configured to: control, in response to a scheduling request aimed at uplink transmission and sent over a licensed band by a user equipment, the transceiver to inspect a channel in an unlicensed band; control, when the inspected channel is idle, the transceiver to send scheduling information aimed at the channel to the user equipment by means of the licensed band; and control the transceiver to receive uplink data transmission sent by the user equipment using the channel.

Abstract: A scene segmentation method and device, and a storage medium. In the present disclosure, an image to be identified is inputted into a deep neural network, depthwise separable convolution is performed on the image by using a down-sampling module to obtain a first characteristic image smaller than the image in size, atrous convolution is performed on the first characteristic image by using an atrous spatial pyramid pooling module to obtain second characteristic images with different scales, and depthwise separable convolution is performed on the second characteristic images with different scales by using an up-sampling module to obtain a third characteristic image with the same size as the image, and pixels in the third characteristic image are classified by using a classification module to obtain a scene segmentation result of the image.

Abstract: Disclosed is a computing system capable of performing a method that involves receiving, from a first device, a first indication that a peripheral device associated with the first device is available for sharing; sending, to a second device, a second indication that the peripheral device is available for sharing; receiving, from the second device, a request to access the peripheral device; and based at least in part on receipt of the request, causing a peer-to-peer connection to be established between the second device and the first device, the peer-to-peer connection enabling communication between the second device and the peripheral device. The peer-to-peer connection may, for example, enable direction of the peripheral device to the second device so that the peripheral device is a virtual device of the second device.

Abstract: A vehicle includes a traction battery having a plurality of battery cells and a balance circuit configured to selectively discharge one or more of the battery cells. A controller is programmed to estimate charge capacities of the battery cells and determine a standard deviation of the estimated capacities. The controller is further programmed to determine a skewness of the estimated capacities. The controller is also programmed to, in response to the skewness exceeding a first threshold, command the balance circuit to discharge one or more of the battery cells when a state of charge (SOC) of the traction battery is less than a second threshold, and, in response to the skewness being less than the first threshold, command the balance circuit to discharge one or more of the battery cells when the SOC of the traction battery is greater than the second threshold.

Abstract: This disclosure relates to blockchain-type storage of receipt data. In one aspect, a method includes obtaining a to-be-stored data record including a first service attribute. Execution information of the to-be-stored data record is determined. A previous data record is obtained from a blockchain-type ledger. The previous data record includes a second service attribute that is the same as the first service attribute. Each data block in the blockchain-type ledger includes a block header and a block body. A hash value of the previous data record is determined. A receipt record is generated. The receipt record includes the hash value of the previous data record and the execution information of the to-be-stored data record. The to-be-stored data record and the receipt record are written into a same block body in the blockchain-type ledger.

Abstract: A method for calculating wellbore casing wear is provided that includes determining a wellbore boundary for an open hole wellbore segment, calculating a casing shape within the open hole wellbore segment based on one or more casing attributes, determining whether or not the casing shape exceeds the wellbore boundary, calculating casing wear based on the boundary of the open hole wellbore segment if the casing shape is determined to exceed the wellbore boundary, otherwise calculating the casing wear parameter based on the casing shape if the casing shape is determined not to exceed the wellbore boundary, and storing the casing wear parameter on a computer readable medium.

Abstract: Systems and methods for detecting a gas kick within a wellbore are provided. The system includes a rotatable tool including one or more acceleration sensors and/or oscillators. The method includes rotating the rotatable tool in contact with fluid inside the wellbore and detecting changes in rotational velocity of the rotatable tool to detect the gas kick. In other aspects, the method includes detecting a change in density of the fluid within the wellbore by at least one or more pressure waves to determine the gas kick within the wellbore.

Abstract: A deep neural network operation method and apparatus are provided. The method comprises: obtaining an input feature map of a network layer; displacing respectively, according to a preset displacement parameter, each of channels of the input feature map of the network layer along axes, to obtain a displaced feature map, wherein the preset displacement parameter comprises displacement amounts of the channel in the axes; and performing convolution operation on the displaced feature map with a 1×1 convolution kernel to obtain an output feature map of the network layer. The operation efficiency of the DNN can be improved through the above method.