Abstract: There is provided an obstacle detection method, an electronic device and a storage medium, which relates to the field of computer technologies, and particularly to the fields of autonomous driving technologies, intelligent transportation technologies, Internet of Things technologies, deep learning technologies, or the like. The method for detecting obstacle includes: detecting an obstacle in a vehicle traveling process using plural obstacle detection manners to obtain plural initial detection results of the obstacle, the plural initial detection results corresponding to the plural obstacle detection manners; fusing the plural initial detection results to obtain a fusion result; and obtaining a final detection result of the obstacle based on the fusion result.

Abstract: Embodiments of the present application provide a collision detection method and apparatus based on an autonomous vehicle, a device and a storage medium, where the method includes: acquiring first point cloud data of each obstacle in each region around the autonomous vehicle, where the first point cloud data represents coordinate information of the obstacle and the first point cloud data is based on a world coordinate system; converting the first point cloud data of the each obstacle into second point cloud data based on a relative coordinate system, where an origin of the relative coordinate system is a point on the autonomous vehicle; determining, according to the second point cloud data of the each obstacle in all regions, a possibility of collision of the autonomous vehicle. A de-positioning manner for collision detection is provided, thereby improving the reliability and stability of collision detection.

Abstract: Provided are a text recognition method, an electronic device, and a non-transitory computer-readable storage medium, which are applicable in an OCR scenario. In the particular solution, a text image to be recognized is acquired. Feature extraction is performed on the text image, to obtain an image feature corresponding to the text image, where a height-wise feature and a width-wise feature of the image feature each have a dimension greater than 1. According to the image feature, sampling features corresponding to multiple sampling points in the text image are determined. According to the sampling features corresponding to the multiple sampling points, a character recognition result corresponding to the text image is determined.

Abstract: This application provides a terminal device and a communication method. The terminal device is in a dual-connectivity network including a long term evolution (LTE) link and a new radio (NR) link, and when the terminal device detects that the terminal device is in a power saving mode, and/or when the terminal device detects that battery power of the terminal device is less than or equal to a first preset value, and/or when the terminal device detects that temperature of a rear cover of the terminal device is greater than or equal to a second preset value, the terminal device releases the NR link, and uses the LTE link for communication.

Abstract: In one aspect, the disclosure relates to multi-functional catalysts for use in carbon dioxide-assisted dehydroaromatization (CO2-DHA) processes utilizing a microwave reactor. The disclosed multifunctional catalysts inhibit coke production, thereby solving a long-standing problem of rapid deactivation and regeneration issues. Moreover, the disclosed multifunctional catalysts, when used in the disclosed processes, provide for a reduced reaction temperature and improved BTX aromatic selectivity versus conventional process. The disclosed multifunctional catalysts for the aromatization of natural gas provide a more cost effective and energy efficient processes than existing conventional methods. Accordingly, the disclosed technology can significantly improve process economics for natural gas conversion and BTX aromatics production and yield a higher percent of product while limiting side reactions.

Abstract: A method for recognizing a text, an electronic device and a storage medium. An implementation of the method comprises: obtaining a multi-dimensional first feature map of a to-be-recognized image; performing, based on feature values in the first feature map, feature enhancement processing on each feature value in the first feature map; and performing a text recognition on the to-be-recognized image based on the first feature map after the enhancement processing.

Abstract: A collision detection method, an electronic device, and a storage medium are provided, which relate to a field of artificial intelligence technology, and in particular to fields of intelligent transportation and autonomous driving technologies. The method includes: determining a predicted travel range of a target object based on a planned travel trajectory of the target object and a historical travel trajectory of the target object; determining, in response to a target obstacle being detected, a predicted travel range of the target obstacle based on a current travel state of the target obstacle; and determining whether the target object has a risk of colliding with the target obstacle, based on the predicted travel range of the target object and the predicted travel range of the target obstacle.

Abstract: A system for producing an active short circuit in an electric motor of a hybrid electric vehicle having a traction battery includes an inverter to be provided in communication with the motor and battery, and an inverter controller to generate driver signals to operate inverter switches to produce three-phase AC for the motor or to produce DC for battery charging. In response to motor speed exceeding a threshold, the controller is configured to generate driver signals to operate the inverter switches to produce an active short circuit in the motor to prevent battery overcharging. A processor and electric circuit are each configured to independently generate an active short circuit control signal operative to effectuate generation of the driver signals, the active short circuit produced based on an active short circuit control signal from the electric circuit in an absence of an active short circuit control signal from the processor.

Abstract: The present invention provides a serum-free polypeptide composition for promoting proliferation of mesenchymal stem cells. The composition mainly comprises: 10-100 ?g/L of tripeptide-1; 1-20 ?g/L of tripeptide-2, 1-20 ?g/L of hexapeptide-9, 1-20 ?g/L of palmitoyl hexapeptide-12; and 10-100 ?g/L of a laminin-derived peptide. The serum-free polypeptide composition provided in the present disclosure has clear chemical components without animal origins or serum, can achieve rapid proliferation of the mesenchymal stem cells, and maintains the biological characteristics and immunophenotypic stability of the mesenchymal stem cells while solving the problem of the insufficient quantity of cells.

Abstract: A scroll compressor includes a fixed scroll, a movable scroll, a main bearing housing and an axial compliance mounting mechanism. The fixed scroll is engaged with the movable scroll to compress a working fluid. The main bearing housing has a bearing surface for supporting a movable scroll end plate. The fixed scroll is fixedly connected to a connecting portion of the main bearing housing by the axial compliance mounting mechanism so that the fixed scroll can move in the axial direction by a predetermined distance. The fixed scroll further includes a flange extending radially outward from a circumferential wall portion, having an axial geometric center position between a first surface and a second surface and positioned such that the axial geometric center position is closer to the movable scroll end plate than the axial middle position thereof. The structure can prevent or reduce damage to the axial compliance mounting mechanism.

Abstract: The present application provides a vehicle fault handling method, an apparatus and a storage medium, the method includes: acquiring in real-time, by a first vehicle fault handling device, status information of a second vehicle fault handling device, where the first vehicle fault handling device is further configured to monitor a main system of a vehicle in real-time, the second vehicle fault handling device is configured to monitor a first computing device, and the first vehicle fault handling device and the main system are provided in the first computing device; determining, by the first vehicle fault handling device, whether a fault has occurred in the second vehicle fault handling device according to the status information thereof; and performing, by the first vehicle fault handling device, fault handling if a fault has occurred in the second vehicle fault handling device.

Abstract: A cloud resource join query for join operations across cloud resources is parsed to extract join rules and queries to each cloud resource in the cloud resource join query. Results from the individual cloud queries are dynamically indexed based on pairs of cloud resources indicated in the join rules. A search engine applies first order predicates in the join rules using the dynamic indexes to generate pairwise join results corresponding to the query. A result for the cloud resource join query comprises the pairwise join results after merging.

Abstract: A method for producing an active short circuit condition in an electric motor of a hybrid electric vehicle including a traction battery, an inverter having switches in communication with the electric motor and the traction battery, and an inverter controller in communication with the inverter and configured to generate driver signals to operate the switches to produce three-phase alternating current for the electric motor to drive a vehicle propulsion system or to produce direct current for charging the traction battery. The method includes determining an electric motor speed threshold, wherein the electric motor speed threshold is continuously variable, comparing a monitored speed to the speed threshold, and generating, in response to the monitored speed exceeding the speed threshold, driver signals to operate the switches to produce an active short circuit condition in the electric motor to prevent overcharging of the traction battery.

Abstract: A flyback converter control architecture is provided in which primary-only feedback techniques are used to ensure smooth startup and detection of fault conditions. During steady-state operation, secondary-side regulation is employed. In addition, current limits are monitored during steady-state operation using primary-only feedback techniques to obviate the need for a secondary-side current sense resistor.

Abstract: A method for controlling an unmanned vehicle includes: acquiring unmanned vehicle monitoring information of the unmanned vehicle when it is determined that a course of the unmanned vehicle will be out of control; determining a safety level corresponding to the unmanned monitoring information according to a predefined correspondence between unmanned vehicle monitoring information and a safety level; and controlling, according to the safety level corresponding to the unmanned monitoring information, the unmanned vehicle to drive. Thus, upon determining that the unmanned vehicle has gone beyond a boundary of the autopilot, the problem is identified that the unmanned vehicle will encounter a danger in driving. Then, the autopilot process of the unmanned vehicle is demoted according to the severity of the danger, e.g., decelerated or adjusted in its direction, to avoid safety hazards.

Abstract: The present disclosure provides an method, an apparatus, a device and a storage medium for controlling an unmanned vehicle, where the method includes: receiving control messages transmitted by at least two automatic driving physical apparatuses, where the control messages include indication information; determining an optimal control message according to the indication information in each of the control messages; transmitting the optimal control message to a device for controlling an unmanned vehicle, so that the device for controlling an unmanned vehicle performs driving control on the unmanned vehicle according to the optimal control message. When a plurality of automatic driving physical apparatuses transmit control messages, at this time, the control messages are redundant, and a control message can be selected for execution, so that the unmanned vehicle can receive a control signal in time, which is beneficial to the safe driving of the unmanned vehicle.

Abstract: Disclosed is a method for optimizing feature parameters of straight grooves of a wet friction element and relates to the technical field of heavy-duty vehicle transmission. By using the method, the feature parameters of the straight grooves of the wet friction element can be improved by optimization, and the thermoelastic stability of the wet friction element can be improved.

Abstract: The disclosure relates to a method for improving the alkali resistance and oxidation resistance of a benzothiazole disperse dye, and belongs to the field of disperse dyes. In the disclosure, 4 kinds of diazo components and 8 kinds of coupling components are used in designing and synthesizing 28 thiazole heterocyclic azo disperse dyes, and the alkali resistance and oxidation resistance of the disperse dyes are improved. Structure confirmation is performed on the synthetic disperse dyes, and the alkali resistance, oxidation resistance and other dyeing properties of the disperse dyes are tested.

Abstract: The disclosure relates to a method for improving the alkali resistance and oxidation resistance of a benzisothiazole disperse dye, and belongs to the technical field of textiles. In the disclosure, azo alkali-resistant disperse dyes with benzisothiazole as a diazo component are synthesized based on structural design of the dyes, the alkali resistance and oxygen bleaching resistance of the heterocyclic azo disperse dyes are improved by introducing different groups to a coupling component, a series of benzisothiazole disperse dyes having gradient differences in alkali resistance and oxidation resistance are obtained, disperse dyes capable of meeting requirements of a one-bath process for cotton bleaching and disperse dyeing of a polyester-cotton blended fabric or a one-bath process for alkali deweighting and disperse dyeing of polyester fabrics are determined, and a reference can be provided for structural design of disperse dyes with alkali resistance and oxidation resistance.

Abstract: A system for active short circuit notification in an electric motor of a hybrid electric vehicle including a traction battery, an internal combustion engine in mechanical communication with the motor, and a propulsion system driven by the motor or engine. The system includes an inverter and inverter controller to generate signals to operate inverter switches to produce AC for the motor or DC for battery charging. In response to motor speed exceeding a threshold, the inverter controller is configured to generate signals to operate the switches to produce an active short circuit in the motor to prevent battery overcharging. In response to an active short circuit, the inverter controller is configured to transmit a notification signal to a vehicle controller configured to generate an engine stop control signal operative to stop the engine to reduce current circulation between the inverter and motor caused by the active short circuit.