Abstract: Based on orders fulfilled by shoppers of an online concierge system, the online concierge system identifies items in an order that are difficult to find in a warehouse in which the order is fulfilled. When a shopper obtains a difficult to find item from the warehouse, the online concierge system prompts the shopper to provide information for finding the difficult to find item in the warehouse. The online concierge system stores the information for finding the difficult to find item from the shopper in association with the difficult to find item and with the warehouse. Subsequently, when a different shopper is fulfilling an order from the warehouse including the difficult to find item, the online concierge system displays the information for finding the difficult to find item in the warehouse to the different shopper.

Abstract: An online system performs a method. The method comprises obtaining historical pick data for items located in a warehouse, including data for each of the items picked and pick times between each of the items picked, and determining a taxonomy of items offered by the warehouse. The taxonomy identifies a plurality of product categories structured in a hierarchy, wherein each level of the hierarchy corresponds to a particular level of granularity of product data. The method further comprises applying the historical pick data to a machine learning model to generate pairwise relations between product categories at each level of the taxonomy and generating sequences of product categories based on the pairwise relations. An order for items offered by the warehouse is received and compared to the sequences for each level to generate a pick sequence for picking the items efficiently, which is outputted by the system to a mobile application.

Abstract: Based on orders fulfilled by shoppers of an online concierge system, the online concierge system identifies items in an order that are difficult to find in a warehouse in which the order is fulfilled. When a shopper obtains a difficult to find item from the warehouse, the online concierge system prompts the shopper to provide information for finding the difficult to find item in the warehouse. The online concierge system stores the information for finding the difficult to find item from the shopper in association with the difficult to find item and with the warehouse. Subsequently, when a different shopper is fulfilling an order from the warehouse including the difficult to find item, the online concierge system displays the information for finding the difficult to find item in the warehouse to the different shopper.

Abstract: A system receives a request for a set of items at a warehouse from a user device, and determines a set of candidate items responsive to the request. The system applies a trained item availability model to each candidate item to determine a prediction of a likelihood that the candidate item is available for pickup at the warehouse. A subset of candidate items that have a prediction below a threshold is classified as low availability. The computer system also determines a cap of low availability items to present to a user based on a user utility curve. The user utility curve is modeled based on user utility associated with amounts of low availability items presented. The low availability items are filtered to an amount within the determined cap. The filtered low availability items are sent to the user device for presentation in a user interface.

Abstract: A toolstring for plugging and perforating a wellbore includes a perforating gun extending between an uphole end and a downhole end longitudinally opposed to the uphole end, a plugging assembly extending between an uphole end and a downhole end longitudinally opposed to the uphole end of the plugging assembly, the plug assembly including a setting tool physically attached directly to the perforating gun, the setting tool including an elongate housing extending between an uphole end and a downhole end opposite the uphole end of the housing, an open passageway extending from the uphole end to the downhole end of the housing, and wherein the setting tool further includes an elongate mandrel positioned in the open passageway and having an uphole end and a downhole end opposite the uphole end of the mandrel, and a combustion chamber located within the elongate housing for receiving an energetic charge.

Abstract: An online concierge system requests an image of a receipt of an order from a picker after the picker fulfills the order at a store. The online concierge system performs image processing on the image of the receipt and uses machine learning and optical character recognition to determine a tax amount paid for the order and a confidence score associated with the tax amount. The online concierge system may use the machine learning model for segmenting extracted text in the image of the receipt into tokens. The online concierge system may then determine at least one token associated with a tax item and the tax amount associated with the tax item. The online concierge system communicates the tax amount to the store for reimbursement based on the tax amount and the confidence score.

Abstract: An online concierge system performs asynchronous automated correction handling of incorrectly sorted items using point-of-sale data. The online concierge system receives orders from customer client devices and determines a batched order based on the received orders. The online concierge system sends the batched order to a shopper client device for fulfillment. The online concierge system receives transaction data associated with the batched order from a third party system. The online concierge system determines whether a sorting error occurred based on the transaction data and the batched order. In response to determining that a sorting error occurred, the online concierge system sends an instruction to correct the sorting error to the shopper client device.

Abstract: A perforating gun deployable in a wellbore as part of a tool string includes an outer housing included of a generally tubular wall structure having a pair of opposed longitudinal ends and a central passage extending between the pair of longitudinal ends, a charge carrier assembly received in the central passage of the outer housing and including a tubular charge carrier having a pair of opposed longitudinal ends and at least one radially oriented receptacle configured to receive a combustive shaped charge, an initiator assembly, the initiator assembly including a detonator and an electrical switch configured to detonate the detonator in response to receiving a firing signal, and an electrical connector positioned in the central passage of the outer housing and electrically connected to the initiator assembly, the electrical connector including an electrical contact including a frangible conductor rod, the frangible conductor rod having a shear strength of 1,500 pound-force (lbf) or less.

Abstract: A cooking appliance is provided, including a multi-level gas burner with a body having a lower burner section on a lower side and an upper burner section on an upper side. The lower burner section is separated from the upper burner section. The lower side of the body has a first injection point for receiving a first air-gas mixture for the lower burner section and a second injection point for receiving a second air-gas mixture for the upper burner section. The first injection point is partitioned from the second injection point thereby separating the first air-gas mixture from the second air-gas mixture. The body includes a passageway fluidly connecting the second injection point on the lower side of the body to the upper burner section on the upper side of the body.

Abstract: A cooking appliance is provided, including a multi-level gas burner with a body having a lower burner section on a lower side and an upper burner section on an upper side. The lower burner section is separated from the upper burner section. The lower side of the body has a first injection point for receiving a first air-gas mixture for the lower burner section and a second injection point for receiving a second air-gas mixture for the upper burner section. The first injection point is partitioned from the second injection point thereby separating the first air-gas mixture from the second air-gas mixture. The body includes a passageway fluidly connecting the second injection point on the lower side of the body to the upper burner section on the upper side of the body.

Abstract: Based on orders fulfilled by shoppers of an online concierge system, the online concierge system identifies items in an order that are difficult to find in a warehouse in which the order is fulfilled. When a shopper obtains a difficult to find item from the warehouse, the online concierge system prompts the shopper to provide information for finding the difficult to find item in the warehouse. The online concierge system stores the information for finding the difficult to find item from the shopper in association with the difficult to find item and with the warehouse. Subsequently, when a different shopper is fulfilling an order from the warehouse including the difficult to find item, the online concierge system displays the information for finding the difficult to find item in the warehouse to the different shopper.

Abstract: A charge tube assembly for a perforating gun includes a charge tube configured to receive an explosive shaped charge, and a first endplate configured to couple to a first end of the charge tube, the first endplate including a first faceplate coupled to a first body, wherein the first faceplate includes a first material and the first body includes a second material that is different from the first material.

Abstract: A charge tube assembly for a perforating gun includes a charge tube configured to receive an explosive shaped charge, and a first endplate configured to couple to a first end of the charge tube, the first endplate including a first faceplate coupled to a first body, wherein the first faceplate includes a first material and the first body includes a second material that is different from the first material.

Abstract: A home cooking appliance includes a housing, a cooking compartment in the housing, a flue in the housing and in fluid communication with the cooking compartment for exhausting flue gases from the cooking compartment, an exhaust outlet for exhausting the flue gases from the housing, and a flue boundary connecting the flue and the exhaust outlet, the flue boundary separating flue gases from cooling air flowing through the housing and preventing dilution of flue gases with cooling air. The housing includes a cooling rough-in box having a cooling air flow channel for cooling the rear wall of the flue boundary. The cooling rough-in box includes an opening permitting the cooling air to be drawn into the cooling air flow channel from an exterior of the housing by convection owing to heat on the rear wall of the flue boundary.

Abstract: A burner assembly for a domestic gas cooktop includes a lower burner mounting structure positioned on a first side of the top sheet; a burner body configured to be positioned on an opposite side of the top sheet, the burner body having an igniter positioning surface; an igniter having an igniter end, and a stop integrally formed in the igniter, the stop having an upper ledge; and an urging member that pushes against the lower burner mounting structure, and urges the igniter in a direction away from the lower burner mounting structure and toward the igniter positioning surface such that the upper ledge of the stop is urged into contact with the igniter positioning surface when the burner assembly is in an assembled condition. The igniter is held in an operating position by the burner body and the urging member when the burner assembly is in use.

Abstract: A burner assembly for a domestic gas cooktop includes a lower burner mounting structure positioned on a first side of the top sheet; a burner body configured to be positioned on an opposite side of the top sheet, the burner body having an igniter positioning surface; an igniter having an igniter end, and a stop integrally formed in the igniter, the stop having an upper ledge; and an urging member that pushes against the lower burner mounting structure, and urges the igniter in a direction away from the lower burner mounting structure and toward the igniter positioning surface such that the upper ledge of the stop is urged into contact with the igniter positioning surface when the burner assembly is in an assembled condition. The igniter is held in an operating position by the burner body and the urging member when the burner assembly is in use.

Abstract: Non-image based autofocusing in an imaging system including an autofocus light source on a movable carriage variably positioned with offset in parallel to an optical axis of an objective.