Abstract: The online concierge system generates task units based on orders and assigns batches of task units to pickers. The online concierge system generates task units based on received orders. The online concierge system generates permutations of these task units to generate candidate sets of task batches. The online concierge system scores each of these candidate sets, and selects a set of task batches to assign to pickers based on the scores. Additionally, to determine which task UI to display to the picker, the picker client device uses a UI state machine. The UI state machine is a state machine where each state corresponds to a task UI to display on the picker client device. The state transitions between the UI states of the UI state machine indicate which UI state to transition to from a current UI state based on the next task unit in the received task batch.

Abstract: A grid is created for a map of a geographic region based on a location planning request received from a user device. A plurality of candidate cells are identified from among a plurality of cells of the grid. Each of the candidate cells including a candidate location for a warehouse. Respective isochrones are generated relative to the candidate locations of the plurality of candidate cells based on a delivery time threshold indicated in the location planning request. Respective isochrone scores are determined for the generated isochrones based at least on data indicating a past volume of sales in the isochrone. Based on the respective isochrone scores of the candidate locations, a subset of the candidate locations is selected as a recommended set of locations for warehouses to cover the geographic region. A notification indicating the recommended set of locations is transmitted to the user device.

Abstract: The present disclosure provides materials and methods for detecting the presence of a target, such as a nucleic acid, biomolecule or biological particle, or virus genome in a sample. The present disclosure further provides point of care detection methods that cane done quickly and simply, optionally without sophisticated instrumentation. The present disclosure further provides improved methods for detecting and quantifying detection signals from various emulsions.

Abstract: A method for preparation of a magnetic liquid metal includes: 1) placing A parts by weight of a liquid metal in a container; 2) placing B parts by weight of a metal powder in the container; 3) adding an acidic solution into the container until the liquid metal and the metal powder are submerged; 4) stirring until the liquid metal and the metal powder are sufficiently mixed; and 5) adding water for cleaning the acidic solution, and to obtain the magnetic liquid metal by removing the acidic solution. The viscosity and stiffness of the prepared magnetic liquid metal can quickly respond to the stimulus from an applied magnetic field, and a reversible change from liquid to semisolid or solid exists. With a change in magnetic field strengths, the Young's modulus can be regulated in a range from the level of kPa to the level of MPa.

Abstract: Embodiments of the present invention disclose a method and an apparatus for controlling chip performance, and relate to the field of communications technologies, which solves a problem in the prior art that a chip is reset or performance is greatly decreased as long as a temperature of the chip is higher than a preset threshold. The method includes: obtaining a working temperature of a chip; when the working temperature of the chip reaches one of multiple preset temperature thresholds, obtaining, according to preset correspondence between a temperature threshold and a chip performance control policy, a chip performance control policy that corresponds to the one of the multiple temperature thresholds; and controlling working of the chip according to the control policy. The present invention is applicable to an electronic device to which a chip is applied, such as a desktop computer or a notebook computer.

Abstract: Embodiments of the present invention disclose a method and an apparatus for controlling chip performance, and relate to the field of communications technologies, which solves a problem in the prior art that a chip is reset or performance is greatly decreased as long as a temperature of the chip is higher than a preset threshold. The method includes: obtaining a working temperature of a chip; when the working temperature of the chip reaches one of multiple preset temperature thresholds, obtaining, according to preset correspondence between a temperature threshold and a chip performance control policy, a chip performance control policy that corresponds to the one of the multiple temperature thresholds; and controlling working of the chip according to the control policy. The present invention is applicable to an electronic device to which a chip is applied, such as a desktop computer or a notebook computer.