Abstract: The invention relates to a dynamic fracture width calculation method for drilling fluid loss in a fractured formation, which belongs to the field of loss control of drilling and well completion engineering, and includes the following steps: selecting a model according to seismic data and fracture development characteristics and calculating a static hydraulic width of a formation fracture; substituting the static hydraulic width of the formation fracture into a deformation formula of a fracture hydraulic width, to obtain a dynamic hydraulic width of a wellbore fracture; converting the dynamic hydraulic width of the wellbore fracture into an average mechanical width of the wellbore fracture, according to a conversion relational formula of a mechanical width; and solving a mechanical width distribution range of the fracture according to a standard deviation of a mechanical width distribution of a natural fracture.

Abstract: The invention relates to a dynamic fracture width calculation method for drilling fluid loss in a fractured formation, which belongs to the field of loss control of drilling and well completion engineering, and includes the following steps: selecting a model according to seismic data and fracture development characteristics and calculating a static hydraulic width of a formation fracture; substituting the static hydraulic width of the formation fracture into a deformation formula of a fracture hydraulic width, to obtain a dynamic hydraulic width of a wellbore fracture; converting the dynamic hydraulic width of the wellbore fracture into an average mechanical width of the wellbore fracture, according to a conversion relational formula of a mechanical width; and solving a mechanical width distribution range of the fracture according to a standard deviation of a mechanical width distribution of a natural fracture.

Abstract: A spray arm assembly and a washing appliance having the same are disclosed. The spray arm assembly includes a spray arm, a spray arm seat, and balls. The spray arm is connected to the spray arm seat, and the spray arm is rotatable relative to the spray arm seat. The balls are provided at positions where the spray arm and the spray arm seat are connected and fitted.

Abstract: A spray arm assembly and a washing appliance provided with same. The spray arm assembly comprises an upper spray arm and a lower spray arm, the upper spray arm being connected to the lower spray arm and being located above the lower spray arm; and further comprises a first ball assembly, and the first ball assembly is arranged at a position where the upper spray arm is connected to and cooperates with the lower spray arm; and the upper spray arm is rotatable relative to the lower spray arm. The hydrodynamic loss caused by using a connection method in a sliding friction manner in the prior art is reduced by means of the first ball assembly, and the smoothness during rotation of the upper and lower spray arms can be improved, and the noise can also be reduced.

Abstract: The present disclosure discloses an intelligent monitoring system for an energy switch accessory device, comprising a smart device monitoring unit, a data processing unit, and a data storage unit. A wireless connection and a physical connection of a device are separately checked. Electrical information of a device is obtained through the physical connection. A device is categorized as an ordinary device if the wireless connection of with the device is disconnected while the physical connection with the device is maintained.

Abstract: A quantitative scoring and optimization method of a drilling and completion loss-control material includes: extracting key performance parameters of drilling and completion loss-control materials in loss-circulation zone, sequencing the key performance parameters according to their importance; performing weight calculation on the key performance parameters of the loss-control material by an analytic hierarchy process; determining scores of the key performance parameters of conventional loss-control materials according to an experimental evaluation table of the performance parameters of the loss-control materials; calculating comprehensive scores of all loss-control materials and performing optimal selection on the loss-control materials according to the comprehensive scores.

Abstract: A quantitative scoring and optimization method of a drilling and completion loss-control material includes: extracting key performance parameters of drilling and completion loss-control materials in loss-circulation zone, sequencing the key performance parameters according to their importance; performing weight calculation on the key performance parameters of the loss-control material by an analytic hierarchy process; determining scores of the key performance parameters of conventional loss-control materials according to an experimental evaluation table of the performance parameters of the loss-control materials; calculating comprehensive scores of all loss-control materials and performing optimal selection on the loss-control materials according to the comprehensive scores.

Abstract: An autonomous vehicle communication method comprises sensing a condition associated with the autonomous vehicle, and initiating, by a controller in response to the sensing of the condition, communication pertaining to the autonomous vehicle between a vehicle manager remote to the autonomous vehicle and an external agent external to the autonomous vehicle. The autonomous vehicle communication method further comprises controlling the autonomous vehicle remotely in response to a command that is based on the condition associated with the autonomous vehicle and the communication between the vehicle manager and the external agent.

Abstract: The invention relates to a selection method of loss control materials for lost circulation control in fractured reservoirs based on photoelastic experiments. By using the photoelastic material to simulate rigid lost circulation material, obtaining photoelastic images and load curves during a loading process of plugging zones formed by the lost circulation material, selecting the lost circulation material according to structure stability of plugging zones.

Abstract: A system for an automated vehicle includes a user input interface and an electronic controller. The electronic controller is programmed with instructions to operate at least one aspect of the automated vehicle, is configured to process information input through the user input interface, the information including data directed to predetermined parameters related to the at least one aspect of the automated vehicle at a predetermined location, and update the instructions based on the information to alter the least one aspect of the automated vehicle.

Abstract: A spray arm assembly and a washing appliance having the same are disclosed. The spray arm assembly includes a spray arm, a spray arm seat, and balls. The spray arm is connected to the spray arm seat, and the spray arm is rotatable relative to the spray arm seat. The balls are provided at positions where the spray arm and the spray arm seat are connected and fitted.

Abstract: Distance and object based external notification system for automated hailing service is described. An autonomous vehicle (AV) can include a processor configured to execute instructions stored on a non-transitory computer readable medium to detect, based on sensor information, an object within the AV; determine that the object belongs to a recent occupant of the AV; and, in response to the determining that the object belongs to the recent occupant of the AV, select, based on a proximity of the recent occupant to the AV, a notification modality for sending a message to the recent occupant regarding the object; and send the message using the notification modality.

Abstract: Distance and object based external notification system for automated hailing service is described. An autonomous vehicle (AV) can include a processor configured to execute instructions stored on a non-transitory computer readable medium to detect, based on sensor information, an object within the AV; determine that the object belongs to a recent occupant of the AV; and, in response to the determining that the object belongs to the recent occupant of the AV, select, based on a proximity of the recent occupant to the AV, a notification modality for sending a message to the recent occupant regarding the object; and send the message using the notification modality.

Abstract: This disclosure relates to improved sketch-based image retrieval (SBIR) techniques. The SBIR techniques utilize a neural network architecture to train a domain migration function and a hashing function. The domain migration function is configured to transform sketches into synthetic images, and the hashing function is configured to generate hash codes from synthetic images and authentic images in a manner that preserves semantic consistency across the sketch and image domains. The hash codes generated from the synthetic images can be used for accurately identifying and retrieving authentic images corresponding to sketch queries, or vice versa.

Abstract: The present disclosure discloses an intelligent monitoring system for an energy switch accessory device, comprising a smart device monitoring unit, a data processing unit, and a data storage unit. A wireless connection and a physical connection of a device are separately checked. Electrical information of a device is obtained through the physical connection. A device is categorized as an ordinary device if the wireless connection of with the device is disconnected while the physical connection with the device is maintained.

Abstract: Structured multivariate contextual vehicle operation with integrated semiotic control may include identifying operational environment information representing a current operational environment for the vehicle, identifying a vehicle control action for controlling the vehicle to traverse a portion of a vehicle transportation network, identifying vehicle control modification information in response to the operational environment information, identifying vehicle control information in response to the vehicle control modification information and the vehicle control action, and controlling the vehicle to traverse a portion of a vehicle transportation network in accordance with the vehicle control information by controlling the vehicle to traverse the portion of the vehicle transportation network in accordance with the vehicle control information such that controlling the vehicle to traverse the portion of the vehicle transportation network in accordance with the vehicle control information includes controlling the

Abstract: An autonomous vehicle includes a vehicle body, at least one detector, at least one display and at least one controller. The at least one detector is configured to detect a presence of an external object within a vicinity of the vehicle. The at least one display is supported on the vehicle body. The at least one controller is programmed to determine the presence of the external object upon detection of the external object by the detector. The controller is further programmed to display a rationale indicator on the display to a remote party within the vicinity of the vehicle based on a detection result of the detector indicating the presence of the external object. The rationale indicator is an indication of an external condition occurring in the vicinity of the vehicle.

Abstract: Interactive external vehicle-user communication may include identifying operational environment information representing a current operational environment for an AV; identifying a target external user based on the current operational environment for the AV, the target external user is identified based on sensor information from a sensor of the AV; controlling the AV to output, for the target external user, a first semiotic representation of a control information of the AV related to the operational environment information; receiving an acknowledgement of the first semiotic representation from the target external user; and in response to the acknowledgement, controlling the AV to traverse the portion of the vehicle transportation network, such that controlling the AV to traverse the portion of the vehicle transportation network includes controlling the AV to output a second semiotic representation based on the acknowledgement from the target external user.

Abstract: Structured multivariate contextual vehicle operation with integrated semiotic control may include identifying operational environment information representing a current operational environment for the vehicle, identifying a vehicle control action for controlling the vehicle to traverse a portion of a vehicle transportation network, identifying vehicle control modification information in response to the operational environment information, identifying vehicle control information in response to the vehicle control modification information and the vehicle control action, and controlling the vehicle to traverse a portion of a vehicle transportation network in accordance with the vehicle control information by controlling the vehicle to traverse the portion of the vehicle transportation network in accordance with the vehicle control information such that controlling the vehicle to traverse the portion of the vehicle transportation network in accordance with the vehicle control information includes controlling the

Abstract: An autonomous vehicle communication method comprises sensing a condition associated with the autonomous vehicle, and initiating, by a controller in response to the sensing of the condition, communication pertaining to the autonomous vehicle between a vehicle manager remote to the autonomous vehicle and an external agent external to the autonomous vehicle. The autonomous vehicle communication method further comprises controlling the autonomous vehicle remotely in response to a command that is based on the condition associated with the autonomous vehicle and the communication between the vehicle manager and the external agent.