Abstract: An active control method and device for large deformation of a deep thin-bedded surrounding rock, the active control method includes: drill holes in the surrounding rock of a tunnel against a tunnel face, add the active control device containing a sleeve, a high-strength prestressed anchor bolt, a resin anchoring agent and a grouting device into drill holes, apply a preload to the anchor bolt when the resin anchoring agent has a certain strength, and carry out lag grouting in the surrounding rock through the grouting device after stress adjustment, and the high-strength prestressed anchor bolt and the grouting device are inserted in the sleeve with holes on the side. The active control device or method of the invention can effectively reduce the fracture depth and degree of a thin-bedded soft rock in deep engineering, and effectively inhibit the occurrence of large deformation disasters.

Abstract: Described herein are MAT2A inhibitors and pharmaceutical compositions comprising said inhibitors. The subject compounds and compositions are useful for the treatment of a disease or disorder associated with MAT2A.

Abstract: A stability control method for a virtual synchronous generator (VSG) in a strong grid based on an inductance-current differential feedback is provided. A grid-connected topological structure of a VSG using the control method includes a direct-current (DC)-side voltage source, a three-phase inverter, a three-phase grid impedance and a three-phase grid. By controlling the VSG and controlling the inductance-current differential feedback, the method suppresses the oscillation of the output power from the VSG in the strong grid and implements the stable operation of an inner-loop-free VSG in the strong grid, without adding the physical inductance, increasing the cost of the filter and additionally providing a grid-side current sensor.

Abstract: Provided are an auxiliary alloy casting piece, a high-remanence and high-coercive force NdFeB permanent magnet, and preparation methods thereof. The method for preparing the auxiliary alloy casting piece includes the following steps: providing an auxiliary alloy material including, by mass percentage, 40% to 45% of Pr, 1% to 2% of Co, 0.5% to 1% of Ga, 0.6% to 0.8% of B, 0.1% to 0.2% of V, 0.3% to 0.7% of Ti, and a balance of Fe; smelting the auxiliary alloy material to obtain a smelted material; and subjecting the smelted material to a quick-setting casting to obtain the auxiliary alloy casting piece; where the quick-setting casting includes a refining and a casting in sequence.

Abstract: Systems and methods for frequency management, including: an online media service configured to: receive a request for a media item, the request including a recipient identifier; identify a set of candidate media items ranked by a set of matching criteria; a frequency management service configured to: perform a query against a lookup service, where the query includes (i) an entity identifier of at least one candidate media item of the set of candidate media items, and (ii) the recipient identifier; receive a response from the lookup service including a quantity of impressions associated with the entity identifier and the recipient identifier; identify a predefined frequency threshold; determine that the frequency threshold is exceeded and exclude the at least one candidate media item from a result set based on the determination; and provide the result set including an identifier of at least one other candidate media item.

Abstract: A power tool includes an operating switch; a motor that is connected to the operating switch and capable of starting in response to the conduction of the operating switch and braking in response to the disconnection of the operating switch; and a control circuit configured to control a working state of the motor. The control circuit includes a driver circuit including multiple switching elements; a controller that is coupled to the motor and capable of outputting a first control signal to control the motor to start; and a parameter detection unit for detecting a working parameter of the motor. The controller is configured to, in response to the operating switch being turned on again within a preset time after being turned off, acquire the working parameter and set a duty cycle of a second control signal according to the working parameter to control the motor to restart.

Abstract: A smart conference room system is provided. The smart conference room system includes an intelligent conference interactive panel including one or more processors configured to convert user input into a conference information, and a memory configured to store the conference information. The intelligent conference interactive panel is configured to transmit conference information to one or more terminal devices. The one or more terminal devices are configured to perform a controllable operation based on the conference information transmitted to the one or more terminal devices.

Abstract: Provided is a method for preparing a layered positive electrode material, comprising the following steps: (1) mixing layered nickel cobalt manganese hydroxide with a lithium source, carrying out primary sintering in an oxygen atmosphere, pulverizing and sieving to obtain a primary sintering product; and (2) carrying out secondary sintering on the primary sintering product in a sulfur dioxide atmosphere to obtain a layered positive electrode material, of which the chemical formula is NiaCobMnc(OH)2, wherein 0.3?a?0.95, 0.03?b?0.12, 0.01?c?0.10, and a+b+c=1. Also provided are a layered positive electrode material obtained by the preparation method and a lithium-ion battery comprising the layered positive electrode material.

Abstract: A compound of Formula (I), or a pharmaceutically acceptable salt thereof, is provided that has been shown to be useful for treating a PRC2-mediated disease or disorder: wherein R1, R2, R3, R4, R5, and n are as defined herein.

Abstract: The present invention discloses a centrifugal intelligent construction device for excavating concrete structure: a push-type excavation equipment, excavating rocks and soil, and collecting crushed stones, sand, soil, and water; a centrifugal screening equipment, performing centrifugal screening and classification collection on the collected crushed stones, sand, soil, and water; the intelligent batching equipment, which matches the classified crushed stones, sand, soil, and water according to their quality and fineness, adding cementitious materials, auxiliary materials, additives, and activators, and mixing them to obtain a mixed wet material; a centrifugal printing equipment, pumping and extruding the mixed wet materials, and using a centrifugal rotating outer cylinder to print and compact them into dense shape; an intelligent reinforcement equipment, integrating reinforcements between the layers of printed concrete strips by using the wall mounted laying, positioning and inserting reinforcements inside the

Abstract: The present application provides a video signal identification method and apparatus, an electronic device and a readable storage medium. The method includes: reading a first register to obtain a format value of a video signal received (S100); in a case that the format value is shared by target video signals with multiple formats, configuring a second register according to at least one of the multiple formats for the target video signals, and detecting whether the video signal received is in a locked state (S110); and in response to configuring the second register according to a first target format and detecting that the video signal received is in the locked state, determining that a format of the video signal received is the first target format (S120).

Abstract: The present invention discloses a 3D weaving and printing integrated structure construction equipment, comprising: a printing matrix material preparation device, processing the printing matrix raw materials and then delivering them to a printing matrix extrusion device; a printing matrix extrusion device, having the functions of promoting extrusion and lamination molding, and printing a matrix; a wire pushing and spatial anchoring device, using a nail-shooting to position and tow a rope/wire/cable for continuously weaving layer by layer stacking along the vertical direction; an electromagnetic guided shuttle dropping device, weaving the rope wire/cable material along the longitude and latitude directions; Aa locking device, positioning and fixing the rope/wire/cable woven along the longitude and latitude directions; a tensioning traction device, performing spatial multi-directional prestress tensioning on the rope/wire/cable woven along the longitude and latitude directions.

Abstract: A method for filling an oil and gas well of a fractured oil and gas reservoir with pack-off particles to reduce water and increase oil production comprises the following steps: (1) injecting a filling liquid carrying pack-off particles into a wellbore and a fracture via a wellhead, until a stratum crack/fracture extension pressure is reached or exceeded, or until an injection amount per unit injection pressure is close to zero, or until a preset filling amount of pack-off particles is reached; (2) launching production.

Abstract: An objective lens, an optical imaging device, an optical system, and a test method of the optical system, relating to the field of optical testing. The purpose is to optimize the structure of the objective lens. The objective lens comprises a housing and an optical focusing assembly. The housing comprises a cavity, and the cavity is provided with a first opening and a second opening. The optical focusing assembly is mounted in the cavity, the focal point of the optical focusing assembly is located at the second opening, and the optical focusing assembly is configured to focus light entering the housing from the first opening a to the focal point. The optical focusing assembly in the objective lens focuses light on the basis of one of the reflection principle and the refraction principle.

Abstract: Disclosed is a preparation method for tricalcium silicate powder. The method includes the following steps: taking CaCO3 powder and SiO2 powder as raw materials for preparation, so as to obtain mixed powder having uniform components; pre-pressing the obtained mixed powder to make a blank; and performing sintering treatment on the obtained blank at a temperature of 1,200 DEG C-1,500 DEG C for 0.5 h-1.5 h, so as to obtain tricalcium silicate, where the sintering treatment is to perform mixed sintering by using auxiliary heating bodies and in cooperation with microwave treatment. According to the present disclosure, the tricalcium silicate is prepared through mixed sintering by using the auxiliary heating bodies and in cooperation with the microwave treatment, and a mixed heating mechanism enables a sample to be heated more easily at a low temperature, so that synthesis purity and efficiency are improved.

Abstract: The invention relates to an indole derivative shown in general formula (I-1) and its use in preparing drugs for preventing and/or treating indications of S1P receptor related disorders. The indole derivative of the invention is replaced by R1, R2, R5, and R6 at different sites respectively, and the obtained modified indole derivative has excellent biological activity and is an ideal S1P receptor regulator with high efficiency. Compounds of general formula (I-1) can be used to treat and/or prevent Crohn's disease, ulcerative colitis, psoriasis, rheumatoid arthritis, multiple sclerosis, atopic dermatitis, eosinophilic esophagitis, alopecia areata, primary cholangitis, pyoderma gangrenosum, graft-versus-host disease, amyotrophic lateral sclerosis, systemic lupus erythematosus, type I diabetes arteriosclerosis, atherosclerosis, scleroderma, autoimmune hepatitis, acne, microbial infection, viral infection, and other autoimmune and inflammatory diseases.

Abstract: The present disclosure relates to an array substrate, a liquid crystal display panel and a display device. The array substrate includes a base substrate on which a gate metal layer and a source-drain metal layer are stacked in sequence. The gate metal layer includes a plurality of independent gate lines and a plurality of independent dummy gates, the source-drain metal layer includes a plurality of independent data lines and a plurality of independent dummy drains. The dummy gate includes a main body portion in a pixel region defined by a gate line and a data line and a lead-out portion; and the dummy drains are in pixel regions, and the dummy drain in the pixel region includes a first subsection overlapping with the main body portion and a second subsection not overlapping with the main body portion.

Abstract: A vertical oscillation auxiliary platform, wherein a drive mechanism drives an upper cover tread board to make vertical up-and-down movements with a transmission mechanism; when the drive mechanism drives a transmission shaft rotate, the transmission shaft drives lower parts of 8-shaped bearing blocks to rotate eccentrically, and upper parts thereof move horizontally; the 8-shaped bearing blocks drive one end of triangular bearing blocks to move horizontally with horizontal transmission rods, and the triangular bearing blocks, without moving a third end, convert horizontal movements at one end to be vertical movements at another end, and drive finally the upper cover tread board to generate stable vertical oscillation, so that singularity and stability of vertical movements of the upper cover tread board can be promised, and more stable and comfortable feeling and passive exercise effects can be gained, without deteriorating the exercise effects and exercise comfort due to additional disorganized lateral move

Abstract: Disclosed are a display substrate, a display panel and a display device. The display substrate has a display region and a non-display region, wherein the display substrate includes a base substrate; a near-field communication antenna on the base substrate and comprising a main body, wherein the main body is in the display region, and at least a portion of the main body is transparent.

Abstract: A digital microfluidic chip and a digital microfluidic system. The digital microfluidic chip comprises: an upper substrate and a lower substrate arranged opposite to each other; multiple driving circuits and multiple addressing circuits disposed between the lower substrate and the upper substrate; and a control circuit, electrically connected to the driving circuits and the addressing circuits. The control circuit is configured to apply, in a driving stage, a driving voltage to each driving circuit, such that a droplet is controlled to move inside a droplet accommodation space according to a set path, measure, in a detection stage, after a bias voltage is applied to each addressing circuit, a charge loss amount of each addressing circuit, and to determine the position of the droplet according to the charge loss amount. The charge loss amount of each addressing circuit is related to the intensity of received external light.