Abstract: An online concierge system trains a user interaction model to predict a probability of a user performing an interaction after one or more content items are displayed to the user. This provides a measure of an effect of displaying content items to the user on the user performing one or more interactions. The user interaction model is trained from displaying content items to certain users of the online concierge system and withholding display of the content items to other users of the online concierge system. To train the user interaction model, the user interaction model is applied to labeled examples identifying a user and value based on interactions the user performed after one or more content items were displayed to the user and interactions the user performed when one or more content items were not used.

Abstract: An online concierge system uses a model to predict a user's interaction with an item, based on a user embedding for the user and an item embedding for the item. For the model to account for more recent interactions by users with items without retraining the model, the online concierge system generates updated item embeddings and updated user embeddings that account for the recent interactions by users with items. The online concierge system compares performance of the model using the updated item embeddings and the updated user embeddings relative to performance of the model using the existing item embeddings and user embeddings. If the performance of the model decreases, the online concierge system adjusts the updated user embeddings and the updated item embeddings based on the change in performance of the model. The adjusted updated user embeddings and adjusted updated item embeddings are stored for use by the model.

Abstract: An online concierge system includes sponsored content items in an interface including different slots for displaying content items. A sponsored content item may be displayed in a single slot or in multiple adjacent slots. The online concierge system determines a content score for various sponsored content items indicating a likelihood of a user interacting with a sponsored content item and a position bias for slots in the interface indicating a likelihood of the user interacting with a slot independent of content in the slot. Position biases are different dependent on a number of slots in which a content item is displayed. The online concierge system generates a graph identifying potential placements of sponsored content items in slots by selecting content items in an order according to their content scores. Sponsored content items are positioned in slots according to a path through the graph that has the highest overall expected value.

Abstract: The present invention provides a material conveying device including a material conveying groove, having a traveling track; a material bearing and conveying assembly, including: an annular chain; traveling units arranged on the chain at intervals, drivable by the chain to move on the traveling track along a material conveying direction, and provided with a bottom surface close to the material conveying groove, a top surface opposite the bottom surface and side surfaces extending between the top and bottom surfaces; a belt-shaped elastic material bearing portion, connected to the top surfaces and/or the side surfaces of the two adjacent traveling units; and a driving device to drive the chain to circularly rotate relative to the material conveying groove along the material conveying direction. The working state of material conveying equipment can be improved, and the stability and economic index of the equipment can be enhanced.

Abstract: An online concierge system allows a user to provide a nutritional goal and uses the nutritional goal as a constraint for selecting candidate orders to display to the user. From prior orders from the user, the online concierge system generates order templates including combinations of generic item descriptions corresponding to items previously included in orders from the user. From the order templates, the online concierge system generates candidate orders including specific items from a warehouse corresponding to the generic item descriptions. The online concierge system selects a set of the candidate orders that each include specific items with combined nutritional information satisfying the user's nutritional goal. Based on probabilities of the user purchasing different candidate orders of the set, the online concierge system selects one or more candidate orders of the set for display to the user.

Abstract: An online concierge system trains a user interaction model to predict a probability of a user performing an interaction after one or more content items are displayed to the user. This provides a measure of an effect of displaying content items to the user on the user performing one or more interactions. The user interaction model is trained from displaying content items to certain users of the online concierge system and withholding display of the content items to other users of the online concierge system. To train the user interaction model, the user interaction model is applied to labeled examples identifying a user and value based on interactions the user performed after one or more content items were displayed to the user and interactions the user performed when one or more content items were not used.

Abstract: An online concierge system enables users to create lists of items and generate a link allowing other receiving users to access a list by selecting the link. When a receiving user selects the link, the online concierge system generates a user-specific list from the original list. The user-specific list includes user-specific items selected for the receiving user that replace items in the original list based on item availability to the receiving user, receiving user preferences, and other receiving user-specific criteria. The receiving user can then view the user-specific items in the user-specific list via an interface allowing the user-specific items in the user-specific list to be included in an order in a single interaction.

Abstract: An online concierge system trains a user interaction model to predict a probability of a user performing an interaction after one or more content items are displayed to the user. This provides a measure of an effect of displaying content items to the user on the user performing one or more interactions. The user interaction model is trained from displaying content items to certain users of the online concierge system and withholding display of the content items to other users of the online concierge system. To train the user interaction model, the user interaction model is applied to labeled examples identifying a user and value based on interactions the user performed after one or more content items were displayed to the user and interactions the user performed when one or more content items were not used.

Abstract: The present invention provides a scraper including a scraper body, having opposed bottom and top surfaces and a supporting body, formed on the bottom surface. The supporting body is provided with a mounting surface forming a part of the bottom surface. The mounting surface is provided with a rolling body able to support the scraping body when the scraper is located at a mounting position. The supporting body is a nonmetallic elastomer. The present invention also provides material conveying equipment using the scraper. By changing a contact and friction mode of the scraper and a conveying groove, a working state of the scraper and the a whole load of the conveyor are improved, idle load is reduced, and the whole service life of the scraper and even the scraper conveyor is prolonged.

Abstract: A focusing device includes a fixing base, a screw rod, a focusing gear, a height adjusting ring, and a focusing ring. A first through hole is defined in the fixing base, the screw rod with a first thread is movably mounted on the fixing base. The focusing gear is also mounted on the fixing base and defines a third through hole corresponding to the first through hole. An outer wall of the focusing gear has an engaging portion meshing with the first thread. The focusing ring is movably received in the third through hole and located on a side of the height adjusting ring away from the fixing base. The height adjusting ring can adjust a distance between the focusing ring and a lens module to avoid distortion of an optical lens in any circumstances during focusing.

Abstract: The present invention provides a scraper including a scraper body, having opposed bottom and top surfaces and a supporting body, formed on the bottom surface. The supporting body is provided with a mounting surface forming a part of the bottom surface. The mounting surface is provided with a rolling body able to support the scraping body when the scraper is located at a mounting position. The supporting body is a nonmetallic elastomer. The present invention also provides material conveying equipment using the scraper. By changing a contact and friction mode of the scraper and a conveying groove, a working state of the scraper and a whole load of the conveyor are improved, idle load is reduced, and the whole service life of the scraper and even the scraper conveyor is prolonged.

Abstract: An online concierge system maintains a taxonomy associating one or more specific items offered by a warehouse with a generic item description. When the online concierge system receives a generic item description from a user for inclusion in an order, the online concierge system uses the taxonomy to select a set of items associated with the generic item description. Based on probabilities of the user purchasing various items of the set, the online concierge system selects an item of the set for inclusion in the order For example, the online concierge system selects an item of the set for which the user has a maximum probability of being purchased. Subsequently, the online concierge system displays an interface for the user that is prepopulated with information identifying the selected item of the set.

Abstract: An online concierge system maintains historical orders received from a user that include one or more items. For items included in one more historical orders, the online concierge system determines an interval between orders including an item, providing an indication of a frequency with which the user orders the item. When the online concierge system receives a request to create an order from the user, in response to an amount of time between a most recently received order including the item and a time when the request was received is within a threshold duration of the interval between orders including the item, the online concierge system selects an item from a category including the item. The selected item may be the item or an alternative item in the category. Subsequently, the online concierge system displays an interface for the user that is prepopulated with information identifying the selected item.

Abstract: A focusing device includes a fixing base, a screw rod, a focusing gear, a height adjusting ring, and a focusing ring. A first through hole is defined in the fixing base, the screw rod with a first thread is movably mounted on the fixing base. The focusing gear is also mounted on the fixing base and defines a third through hole corresponding to the first through hole. An outer wall of the focusing gear has an engaging portion meshing with the first thread. The focusing ring is movably received in the third through hole and located on a side of the height adjusting ring away from the fixing base. The height adjusting ring can adjust a distance between the focusing ring and a lens module to avoid distortion of an optical lens in any circumstances during focusing.

Abstract: In one embodiment, a system includes a microphone, memory, and a processor. The processor is operable to access environmental sounds captured by the microphone while the user is watching a live video. The processor is further operable to determine, by analyzing the captured sounds, a response by the user to the live video and generate a comment or a reaction element based on the determined response by the user to the live video. The processor is further operable to post the generated comment or reaction element for display along with the live video.

Abstract: A data transmission method is performed by at least one processor of a terminal, and includes displaying one or more messages, each of the one or more messages including a data file, based on a touch and hold input on one of the one or more messages, displaying an option for displaying one or more icons respectively indicating one or more hardware devices capable of executing the data file of the one of the one or more messages, based on a touch input on the option, displaying the one or more icons respectively indicating the one or more hardware devices, and based on a touch input on one of the one or more icons indicating one of the one or more hardware devices, sending, to the one of the one or more hardware devices, the data file of the one of the one or more messages.

Abstract: A detector support device is described comprising a bracket, slide and detector trays, a connector and a cable. The connector comprises detector and cable interfaces, wherein the detector interface is installed on the detector tray to connect to the detector, and an accommodation cavity, in which the cable interface is located, is opened from an upper surface of the slide tray. A first fixing portion fixed to a bottom wall of the accommodation cavity and a first bending portion extending from the first fixing portion to a first end of the cable are also provided between the first end and a second end of the cable, the first end of the cable extends out of the slide tray so as to be connected to an external connector, and the second end of the cable is connected to the cable interface.

Abstract: In one embodiment, a system includes a microphone, memory, and a processor. The processor is operable to access environmental sounds captured by the microphone while the user is watching a live video. The processor is further operable to determine, by analyzing the captured sounds, a response by the user to the live video and generate a comment or a reaction element based on the determined response by the user to the live video. The processor is further operable to post the generated comment or reaction element for display along with the live video.

Abstract: A data transmission method is performed by at least one processor of a terminal, and includes displaying one or more messages, each of the one or more messages including a data file, based on a touch and hold input on one of the one or more messages, displaying an option for displaying one or more icons respectively indicating one or more hardware devices capable of executing the data file of the one of the one or more messages, based on a touch input on the option, displaying the one or more icons respectively indicating the one or more hardware devices, and based on a touch input on one of the one or more icons indicating one of the one or more hardware devices, sending, to the one of the one or more hardware devices, the data file of the one of the one or more messages.

Abstract: A detector support device is described comprising a bracket, slide and detector trays, a connector and a cable. The connector comprises detector and cable interfaces, wherein the detector interface is installed on the detector tray to connect to the detector, and an accommodation cavity, in which the cable interface is located, is opened from an upper surface of the slide tray. A first fixing portion fixed to a bottom wall of the accommodation cavity and a first bending portion extending from the first fixing portion to a first end of the cable are also provided between the first end and a second end of the cable, the first end of the cable extends out of the slide tray so as to be connected to an external connector, and the second end of the cable is connected to the cable interface.