Abstract: A method for upgrading computing devices in a distributed computing environment is provided. The method includes receiving first and second rollout requests for a cluster relating to operational actions for computing devices associated with the cluster. A rollout status for the cluster is determined and the rollout requests are simultaneously performed on the cluster where the operational actions are simultaneously performed on the computing devices associated with the cluster. In addition, a rollout status is updated based on simultaneously performing the rollout requests for the cluster.

Abstract: The present disclosure relates to a toy telescopic device on which each telescopic layer is arranged to be sleeved into one another and slidable into one another, whereby each telescopic layer can be extended and retracted. When in use, each telescopic layer can be extended for usage. When not in use, each telescopic layer can be retracted for placement, which is convenient for storage. In addition, each telescopic layer can be automatically retracted into a grip assembly by means of a self-resetting member; a torque can also be transmitted to the self-resetting member by means of a driving member and a friction wheel, whereby the self-resetting member overcomes a self-resetting force to operate, thereby driving each telescopic layer to extend out. In this way, each telescopic layer can be driven to extend and retract without a manual force, which improves the convenience of usage.

Abstract: A display substrate and a display device are provided. The display substrate includes a base substrate, at least one group of contact pads, a plurality of first light-emitting elements, a plurality of first pixel driving circuits, a plurality of connecting traces, a plurality of data lines and a plurality of leads. The display area includes a first display area and a second display area; the first light-emitting elements are located in the first display area; the first pixel driving circuits are located in the second display area; the leads are located in the first display area and the peripheral area, and connect the data lines and the at least one group of contact pads; orthographic projections of the first light-emitting elements on a substrate surface of the base substrate are at least partly overlapped with orthographic projections of the leads on the substrate surface of the base substrate.

Abstract: This paper describes an invention involving an electrochemical discharge-enabled micro-grinding process for micro-components of silicon-based materials. The specific machining method is described below. A micro-grinding tool and an auxiliary electrode are respectively connected to the negative and positive electrodes of a pulsed DC power supply. When the current flows through the loop, an electrochemical hydrogen evolution reaction (HER) occurs at the micro-grinding tool in the grinding fluid, which generate multiple hydrogen bubbles. The bubbles coalesce into an insulating gas film and separate the micro-grinding tool from the grinding fluid; when the critical voltage is reached, the gas film is broken down and an electrochemical discharge occurs accompanied by discharge spark; under the action of the discharge spark, the surface material of the workpiece in the discharge-affected region is directly ablated to generate a heat-affected layer (HAL), namely, physical modification.

Abstract: Embodiments of this application provide an electronic device, to resolve problems of a complex detachment process and high detachment costs of a first display of a dual screen mobile phone in the conventional technology. The electronic device includes the first display, a second display, and a mainboard located between the two displays. The first flexible printed circuit board on the first display is electrically connected to a surface that is of the mainboard and that faces the first display, and the second flexible printed circuit board on the second display is electrically connected to a surface that is of the mainboard and that faces the second display. Therefore, neither of the two flexible printed circuit boards is wound around two sides of the mainboard.

Abstract: The application discloses a variational autoencoder-based magnetic resonance weighted image synthesis method and device. The method includes the following steps: step S1: acquiring a multi-contrast real magnetic resonance weighted image and a magnetic resonance quantitative parametric image by using a magnetic resonance scanner; step S2: composing a magnetic resonance weighted image; step S3: constructing a pre-trained variational autoencoder model with an encoder-and-decoder structure; step S4: obtaining a variational autoencoder model; and step S5: synthesizing the magnetic resonance weighted image and the magnetic resonance quantitative parametric image into a second magnetic resonance weighted image by the variational auto-encoder model.

Abstract: The invention provides an electrochemical discharge-assisted micro-grinding device for micro-components of brittle and hard materials. The device includes a micro-grinding tool, grinding fluid, a workpiece, an auxiliary electrode, a processing groove, and a pulsed DC power supply; the processing groove is filled with grinding fluid; the micro-grinding tool, the workpiece, and the auxiliary electrode are immersed in the grinding fluid; the micro-grinding tool is composed of a conductive grinding tool base, an electroplating layer, and insulated superabrasives. The micro-grinding tool is connected to the negative electrode of the pulsed DC power supply; the grinding fluid is composed of H2O2, Na2CO3, EDTA-Fe-Na, and deionized water; the workpiece material is brittle and hard; a large number of micro structures need to be produced on the surface of the workpiece.

Abstract: This paper describes an invention involving an electrochemical discharge-enabled micro-grinding process for micro-components of silicon-based materials. The specific machining method is described below. A micro-grinding tool and an auxiliary electrode are respectively connected to the negative and positive electrodes of a pulsed DC power supply. When the current flows through the loop, an electrochemical hydrogen evolution reaction (HER) occurs at the micro-grinding tool in the grinding fluid, which generate multiple hydrogen bubbles. The bubbles coalesce into an insulating gas film and separate the micro-grinding tool from the grinding fluid; when the critical voltage is reached, the gas film is broken down and an electrochemical discharge occurs accompanied by discharge spark; under the action of the discharge spark, the surface material of the workpiece in the discharge-affected region is directly ablated to generate a heat-affected layer (HAL), namely, physical modification.

Abstract: Provided is a liver X receptor regulator of spiro(3,3?-isopropylpyrrolidine oxindole), as well as a preparation method and use thereof. Specifically, a compound is provided, which is a compound represented by Formula (I); or a stereoisomer, geometric isomer, tautomer, nitrogen oxide, hydrate, solvate, metabolite, pharmaceutically acceptable salt, or prodrug of the compound represented by Formula (I).