Abstract: The present invention discloses a method for constructing and optimizing a molecular structure model of lignite, comprising: collecting and processing a lignite sample, analyzing a lignite experimental sample, calculating the number of carbon atoms in lignite and the number of carbon atoms in other parameters, obtaining the sizes of aromatic clusters, and determining the composition features and number of aromatic structural units in lignite; calculating the total number of carbon atoms and the number of aliphatic carbon atoms in lignite; obtaining the categories and number of oxygen-containing functional groups in lignite based on the contents of aromatic hydrocarbon, aliphatic hydrocarbon and various oxygen-containing functional groups, and designing the structural forms of nitrogen and sulfur; constructing a molecular structure model of lignite.

Abstract: A computer-implemented method includes maintaining one or more databases that collectively store organizational data associated with an organization and an object graph data structure having a plurality of data objects associated with the organizational data. The method further includes generating a formula field which includes one or more dependent fields, wherein the formula field is defined and evaluated using a query expression that makes reference to the object graph data structure. The method further includes, in response to a value of at least one of the one or more dependent fields changing to an updated value, automatically updating a value of the formula field based on the updated value of the at least one of the one or more dependent fields, and enabling inclusion of the formula field in one or more of a report, a policy, a workflow, a trigger, or a rule.

Abstract: The present disclosure provides an apparatus and method for wavefront reconstruction based on rotationally symmetric extended structured light illumination. The apparatus includes a laser device, a neutral density filter, a microscope objective, a pinhole, a collimating lens, a beam splitter prism, a spatial light modulator, a lens to be measured, and an image acquisition device that are sequentially arranged. The method permits modulation of incident parallel light into phase grating-like structured light by using a spatial light modulator. Based on the characteristic of non-infinitely small pixel unit of the spatial light modulator, changing the modulation pattern of the spatial light modulator may result in different forms of structured light. Not only the object to be measured but also the real structured light wavefront can be recovered by acquiring diffraction spots at the focal plane and simultaneously updating the object plane and the structured light plane using an algorithm.

Abstract: The present invention discloses a method and system for predicting a creep-fatigue life of a structural part of a thermal power unit. The method includes: constructing a life prediction model; acquiring a stress relaxation curve in a strain control creep-fatigue test through pure creep data to calculate an initial creep damage; acquiring a cyclic hardening coefficient, an elasticity modulus and other related material constants through the pure fatigue data to calculate an initial fatigue damage; and acquiring a difference between strain energy densities in upper and lower parts of creep-fatigue mean stress, making the difference between strain energy densities less than a set threshold through dichotomy iteration to acquire a final creep damage, a final fatigue damage and an oxidative damage under such a circumstance, and predicting the creep-fatigue life of the high-temperature structural part based on the life prediction model.

Abstract: A dissolvable magnesium alloy can be used for components of a downhole tool. The dissolvable magnesium alloy can be dissolved completely and controlled at a dissolving rate so as to be compatible with downhole operations, including hydraulic fracturing operations. The alloy includes nickel at 0.04-0.4% by weight and the balance of magnesium. The alloy is dissolvable in KCl at 2.1% by weight and 95 QC with a dissolving rate in a range of 10-100 mg/cm2/hr, yield strength in a range of 18-37 ksi, ultimate tensile strength in a range of 29-47 ksi, and elongation in a range of 8-40%.

Abstract: A monocrystal growth method and device. The method includes loading silicon material into a crucible for melting to form molten silicon liquid; lowering a heat shield to a preset position, a first preset distance is formed between a lower edge of the heat shield and a liquid level of the molten silicon liquid; in a first stage, using a counterweight to hang a seed shaft to gradually descend in a first direction, using a camera apparatus to acquire a pixel image of the seed shaft and the lower edge of the heat shield for comparison to reference; then a second stage is entered, in which the image processing apparatus records a current position of the seed shaft, the seed shaft is continuously lowered until the seed shaft extends into the molten silicon liquid for welding; seeding; shouldering; body growth; and tailing.

Abstract: Methods and apparatuses for information searching, computer devices and storage mediums are provided. The method comprises: receiving initial query information input in a search box, which includes any one of characters, keywords, and key phrases; displaying associated query information and a live identifier associated with the initial query information in a predetermined position other than the search box, the live identifier being used to indicate that a multimedia content with which the associated query information is associated is being broadcast live. It can avoid searching the query information without determining whether there is a corresponding live content, reduce the cost of trial-and-error in finding the live content, and improve the live content query efficiency, and the associated query information of interest with the live identifier can be selected in the search page to access the corresponding live content, and the efficiency of obtaining the live content is improved.

Abstract: A cam roller type horizontal extrusion cracking system for walnuts, including feeding, cracking and falling devices fixed accordingly on a stand. The feeding device includes a feeding box; an intermittent feeding roller is arranged therein; one side of the roller includes a feeding baffle plate, the other side includes an adjustable feeding scraper blade mechanism; and opposing feeding slots are formed in the roller. The cracking device includes an extrusion box body; movable and fixed tooth-shaped extrusion plates are oppositely mounted therein; one side of the movable plate opposite the fixed includes an extrusion cam; the plates have a plurality of tooth gaps; a walnut passes through the feeding device, falls into a gap between the plates; the cam drives the movable plate to do a periodic reciprocating motion, to synchronously cooperate with the fixed plate to perform extrusion cracking on the walnut.

Abstract: This disclosure provides a multi-functional safety umbrella comprising a main pipe. An umbrella tail is fixedly disposed on an upper side of the main pipe, and a safety structure is disposed on a lower side of the main pipe. The safety structure comprises a safety hammer, and an umbrella head is disposed on an outside of the safety structure. The umbrella head is detachably connected with the safety structure. When the umbrella head and the safety structure is fixed together, the safety hammer of the safety structure is hidden in the umbrella head. A safety hammer structure is disposed at a lower position of the main pipe, and then the umbrella head is disposed on the outside of the safety hammer, so that without affecting the overall appearance and use of the umbrella, the safety hammer can be hidden.

Abstract: A component residual stress testing platform based on neutron diffraction and experimental method thereof are provided, the testing platform includes a component support, a rotating mainshaft, a first thrust cylindrical roller bearing, a first cylindrical roller bearing, a bearing spacing sleeve, a second cylindrical roller bearing, a sleeve, and a first fixed baffle. The rotating mainshaft is disposed on the component support. The first thrust cylindrical roller bearing, the first cylindrical roller bearing, the bearing spacing sleeve and the second cylindrical roller bearing are sleeved on the rotating mainshaft, the sleeve is sleeved outside the first cylindrical roller bearing, the bearing spacing sleeve and the second cylindrical roller bearing, a component to be tested is sleeved on the sleeve. The testing platform can support, move, tilt and rotate the component to be tested in a process of a residual stress testing.

Abstract: A disintegrable rubber seal includes a rubber composite, which contains a rubber matrix including a crosslinked rubber; and an energetic filler configured to generate heat upon activation to disintegrate the rubber matrix. The energetic filler contains a metal and a metal oxide. A weight ratio of the energetic filler to the rubber matrix is about 6:1 to about 1:1.

Abstract: The patent application discloses a degradable thermoset composite. The composite comprises a reaction product of an epoxy resin, a cross-linker, a catalyst. The epoxy resin mixture may comprise at least one cycloaliphatic epoxide. The reaction product may have a glass transition temperature greater than or equal to 140° C. as measured by DMA.

Abstract: Disclosed is a deepwater platform welded joint testing system. The testing system comprises a host unit, a hydraulic unit and a control unit, wherein the control unit is connected with the host unit and the hydraulic unit respectively; the host unit comprises a bearing frame placed on a bearing base, biaxial tension/compression loading oil cylinders mounted on the bearing frame, a lateral force resistant mechanism connected to the front ends of the biaxial tension/compression loading oil cylinders, counter-force supports fixed to the top end of the bearing frame and biaxial bending loading oil cylinders mounted on the counter-force supports.

Abstract: A disintegrable rubber seal includes a rubber composite, which contains a rubber matrix including a crosslinked rubber; and an energetic filler configured to generate heat upon activation to disintegrate the rubber matrix. The energetic filler contains a metal and a metal oxide. A weight ratio of the energetic filler to the rubber matrix is about 6:1 to about 1:1.

Abstract: The present invention relates to an application of an artemisinin compound in treatment of coronavirus infection. Specifically, the present invention provides an application of the compound, and a stereoisomer, a pharmaceutically acceptable salt, a solvate or a hydrate thereof in preparation of medicines. The medicines are used for treating diseases or infection caused by coronavirus (preferably SARS-CoV-2), and the compound is selected from one or more of artemisinin, arteether, artemether, artemisia ketone, dihydroartemisinin, artesunate, arteannuin B, and artemisinic acid.

Abstract: A method of predicting low-cycle fatigue crack initiation and propagation behaviors under a multi-scale framework includes the following steps: S1, providing a calculation method for low-cycle fatigue crack initiation and propagation damages under a multi-scale framework; S2, determining a slip system where a maximum damage is located and an accumulated damage of all slip systems by calculation using the calculation method in S1; S3, a crack initiating and propagating in a direction towards the slip system where the maximum damage is located when the accumulated damage reaches a critical value; and S4, conducting calculation repeatedly until a predicted crack length reaches a fracture length of a low-cycle fatigue specimen under test conditions.

Abstract: In one embodiment, a method comprises: establishing, by a network management device, a wireless multicast tree topology for a wireless mesh network, the wireless multicast tree topology comprising a root network device and wireless multicast hubs providing respective wireless multicast areas, the establishing including selecting each wireless multicast hub based on a corresponding location and a corresponding wireless neighbor count; and causing, by the network management device, the root network device to unicast transmit to a selected one or more of the wireless multicast hubs a multicast packet encapsulated within a unicast header, the unicast header causing the selected one or more of the wireless multicast hubs to multicast transmit the multicast packet within a corresponding one or more of the wireless multicast areas.

Abstract: The present invention relates to an application of benflumetol and derivatives thereof in treatment of coronavirus infection, and specifically provides uses of a compound represented by formula A, and a stereoisomer, a pharmaceutically acceptable salt, a solvate or a hydrate thereof in preparation of drugs. The drugs are used for treating diseases or infection caused by coronavirus (preferably SARS-CoV-2).