Abstract: A construction method for a spatial aggregate reinforced 3D printed concrete structure, includes: selecting a structural member, performing mechanical analysis, and determining a basic dosage and a printing and weaving process of an implanted reinforcement, determining a type, positioning and dosage of a spatial aggregate, preparing 3D printing materials, editing an electromagnetic signal and positioning push program according to the selected positioning and dosage of the spatial rigid aggregate, the 3D printing material is extruded along the printing and weaving process and the spatial rigid aggregate is evenly scattered, and realizing the connection between spatial aggregates and the connection between the spatial aggregates and the reinforcements, a spatial aggregate reinforced 3D printed concrete structure is formed after layer-by-layer construction, superimposed and hardened, or after segmented printing, component nodes are connected through lap design of preset tenon and mortise and reinforcement.

Abstract: A method for model predictive current control of a two-motor torque synchronization system, which belongs to the field of power electronics and motor control. The present disclosure takes an indirect matrix converter and a two-motor system which are coaxially and rigidly connected as a target, and takes two-motor torque synchronization performance and current tracking performance as main control objectives. A two-motor unified prediction model is established and a value function based on free components of error items is configured so as to solve the problems in which when model predictive current control is performed on a two-motor system, setting of a value function weighting coefficient needs to be performed manually, and consequently the setting process is complicated and an erroneous switch state combination is likely to be selected.

Abstract: The present invention discloses a PET system attenuation correction method based on a flow model. The flow model adopted is a completely reversible model, the forward and reverse mappings share the same parameters, and the structure itself is a consistency constraint. The model utilizes the spatial correlation of adjacent slices, and adopts the structure of multi-slice input and single-slice output. The model consists of multiple reversible blocks, each of which consists of a enhanced affine coupling layer and a reversible 1×1 convolutional layer, and uses several small u-nets to learn the transformation parameters of the enhanced affine coupling layer. The present invention avoids additional CT or MR scanning, saves scanning cost for the patient, and reduces the damage of CT radiation to the patient; compared with similar methods, higher quality non-attenuation-corrected PET image can be obtained.

Abstract: The present invention is in the field of organic electroluminescence, and specifically relates to a fused ring carbazole tetradentate metal platinum (II) complex and use thereof. In the present invention, a tetradentate metal platinum (II) complex phosphorescent material is obtained by introducing a five-membered heterocyclic system such as benzofuran or benzothiophene at the 5, 6-positions of carbazole. Increasing the ratio of the local state (LE) in the excited triplet state of the cyclic tetradentate platinum (II) complex leads to a lower shoulder peak, which improves the luminescence color purity of the materials, which in turn increases device lifetime. The materials provided by the present invention all have good chemical stability and thermal stability and are easy to fabricate an evaporation-type OLED device.

Abstract: The present invention provides a cyclic tetradentate metal platinum complex phosphorescent material based on pyridine heterocycle, benzoxazole, and carbazole derivatives. It is a novel tetradentate platinum (II) complex with a 6/6/6 metal fused ring phenoxy coordination structure. The phosphorescent material of the N—C—N—N tetradentate fused ring structure system of the present invention have the characteristics of easy modulation of HOMO and LUMO orbital energy levels and strong luminescence. It has good chemical stability and thermal stability, and is easy to fabricate evaporation-type OLED devices.

Abstract: The present invention discloses Stenotrophomonas maltophilia GYH and its application in degrading chlorinated hydrocarbon pollutants, and the application is carried out as follows: resting cells obtained by spreading cultivation of Stenotrophomonas maltophilia GYH are added to a pH=5-8 inorganic salt medium, and then a chlorinated hydrocarbon pollutant is added, and the cells are cultured at 20-35° C. and 140-180 rpm to degrade the pollutant. The concentration of chlorinated hydrocarbon pollutant which can be removed by Stenotrophomonas maltophilia GYH ranges from 2.9 mg/L to 8.93 mg/L. Therefore, the Stenotrophomonas maltophilia has a highly efficient degradation ability for similar industrial pollutants and is able to withstand high concentrations of these pollutants.

Abstract: The present invention discloses an adaptive knowledge graph representation learning method for integrating a graph structure with text information, including: (1) sampling a neighbor triple of each of a head entity and a tail entity in a target triple; (2) calculating semantic representations of the target triple, and neighbor triples of its head and tail entities; (3) calculating structure representations of the head and tail entities of the target triple; (4) splicing the semantic representation of the target triple with the structure representations of its head and tail entities, inputting a spliced result into an adaptive classification layer, and calculating a classification result and a classification loss; and (5) optimizing the foregoing module based on an optimization algorithm of gradient descent, until a loss value converges, to obtain a final spliced result between the semantic representation of the target triple and the structure representations of its head and tail entities.

Abstract: A vacuum chamber structure of an ultra-high gravity geotechnical centrifuge device, comprising: a cylindrical shell, a convex head, a bottom head, a lower bearing sealing cover, and a vacuum pressure-bearing chamber formed by sealing a top cylindrical cylinder and an upper sealing plate with sealing rings; wherein a high-speed rotor system is enclosed in the vacuum pressure-bearing chamber, and a cylindrical cooling device is installed between an internal side of the cylindrical shell and the high-speed rotor system. An annular cooling device is provided directly above the hanging baskets on both sides of the centrifuge arm. A vibration isolation expansion joint is arranged at the intersection of the high-speed rotor system and the cylindrical cylinder, which isolates the vibration of the main engine from the vacuum chamber and greatly reduces the vibration.

Abstract: The present invention discloses a decoupling divide-and-conquer facial nerve segmentation method and device. As for the characteristics of a small facial nerve structure and a low contrast, a facial nerve segmentation model including a feature extraction module, a rough segmentation module, and a fine segmentation module is constructed. The feature extraction module is configured to extract a low-level feature and a plurality of different- and high-level features. The rough segmentation module is configured to globally search the different- and high-level features for facial-nerve features and fuse them. The fine segmentation module is configured to decouple a fused feature to obtain a central body feature. After the central body feature is combined with the low-level feature to obtain an edge-detail feature, a space attention mechanism is used to extract attention features from the central body feature and the edge-detail feature, to obtain a facial nerve segmentation image.

Abstract: A method for diagnosing rotor rub-impact in a rotating machinery based on vibration signal deconstruction and frequency modulation characteristic anti-noise enhancement, including: converting, based on two-stage integration transformation and high-pass filtering, vibratory acceleration signals from a rotating machinery device into vibratory displacement signals; performing targeted extraction on a rotating frequency component therein based on an improved variational mode decomposition method; calculating and estimating instantaneous fluctuation characteristics of a fundamental frequency of the extracted rotating frequency component using a quadrature-derivative-based normalized Hilbert transform to obtain an instantaneous frequency; inputting a calculated instantaneous frequency sequence into an optimum stochastic resonance system for anti-noise enhancement of intrawave frequency modulation characteristics; and processing FFT on an instantaneous frequency of intrawave frequency modulation characteristics afte

Abstract: Provided are a DEMOS device and a method for producing the same. The DEMOS device includes a silicon substrate, a well region, a source region, a drain region, a drift region, a lightly doped region, a gate structure, and a field plate structure. The gate structure includes a primary gate structure and a secondary gate structure. The primary gate structure is disposed on a p-type well or an n-type well of the well region, and configured to receive an input signal. The secondary gate structure covers part of the p-type well and part of the drift region, or part of the n-type well and part of the drift region. The secondary gate structure is configured to receive a fixed bias voltage. The short gate length of the primary gate structure significantly reduces gate-drain capacitance, and increases cutoff frequency, enhancing high-frequency performance, while having minimal impact on breakdown voltage.

Abstract: A method for lossless ARGB (Alpha, Red, Green, Blue) compression based on an intra-block prediction is provided. The method is executed by a processor, and the method comprises for an input image block under a processing channel, executing the following operations until all input image blocks are encoded: obtaining a predicted value of the input image block under a current processing channel based on the input image block under the current processing channel by the intra-block prediction; determining predicted residuals of the input image block under the current processing channel based on the predicted value and an original pixel value; inputting the predicted residuals into a residual encoder for encoding to obtain a residual stream of the input image block under the current processing channel; and storing residual streams of all input image blocks of all processing channels as a compressed file in a storage file.

Abstract: A preparation method a tunable transparent terahertz absorption film for enhancing thermal radiation includes: evaporating/sputtering an indium tin oxide (ITO) on one surface of a polyimide film, transferring graphene to the other surface of the polyimide film, preparing one electrode on the graphene, spin-coating an ionic gel, and preparing the other electrode on the ionic gel to form the tunable transparent terahertz absorption film; and changing bias voltages at two ends of the electrode, acquiring a terahertz time-domain signal of the tunable transparent terahertz absorption film to derive an absorption rate of the tunable transparent terahertz absorption film corresponding to the bias voltages, and placing the tunable transparent terahertz absorption film under sunlight/infrared light to acquire a heating effect. The preparation method utilizes the transparent absorption film of a graphene-polyimide-ITO structure to absorb terahertz waves of multiple bands, improving the heating effect.

Abstract: An ultrasonic extraction device for plant polyphenols is provided, which includes an ultrasonic processor system, configured for conducting ultrasonic-assisted enzymatic hydrolysis on mixed cellulase solution and plant raw material suspension to extract plant polyphenols; a reactor flow system, including a first reactor flow subsystem, wherein the first reactor flow subsystem is configured for mixing cellulase solution and plant raw material suspension and conveying mixed cellulase solution and plant raw material suspension into the ultrasonic processor system, and the mixed cellulase solution and plant raw material suspension can circulate in the ultrasonic processor system; and a reactor control system, configured for detecting temperature in the ultrasonic processor system and concentration of plant polyphenols in the solution after reaction in the ultrasonic processor system, and controlling working conditions of the ultrasonic processor system and the reactor flow system accordingly.

Abstract: A light scattering patch device and preparation method thereof is disclosed. The light scattering patch device is composed of a patch, an air gap, and a tapered optical fiber; the patch is a transparent patch; a refractive index of the patch is greater than a refractive index of a biological tissue; a tip, a tapered transition zone and a partial unstretched zone of the tapered optical fiber are embedded in the patch, and the air gap is formed between the tip and the tapered transition zone of the tapered optical fiber and the patch. The method of preparing the light scattering patch device comprises: first preparing the tapered optical fiber, then performing hydrophobic modification on the surface of the tapered optical fiber; placing the tapered optical fiber in an uncured polymer and curing the uncured polymer, and pulling the unstretched part; connecting the unstretched part of the tapered optical fiber.

Abstract: Disclosed in the present invention is an ultra-compact CAM array based on a single MTJ and an operating method thereof. The CAM array comprises an M*N CAM core for storing contents, additional reference rows for storing “0” and “1” and reference columns for storing “0” and “1”, a row decoder, a column decoder, transmission gates ENs, write drivers WDs, search current sources Isearchs and two-stage detection amplifiers. The present invention utilizes 1T-1MTJ cells to construct the CAM array, and combines the advantages of the MTJ and CMOS. While ensuring search energy efficiency, a unique structure of the MTJ is utilized to implement a less area overhead and a lower search delay compared with a traditional CMOS-based CAM, and non-volatility is achieved.

Abstract: The present disclosure relates to the field of artificial honeycombs, in particular to an artificial nest for solitary bees and an application method of the artificial nest. The artificial nest comprises a main enclosure tube, hanging rings, a plurality of trapping hollow tubes and tightening mechanisms used for clamping the trapping hollow tubes. The hanging rings are arranged at an outer sidewall of the main enclosure tube. The tightening mechanisms are annularly arranged at an inner sidewall of the main enclosure tube, and the trapping hollow tubes are fixed in a ring of each tightening mechanism in an axis direction of the main enclosure tube. Each tightening mechanism comprises a connecting steel wire and fastening springs. The sidewall of the main enclosure tube is provided with fixing holes for fixing the tightening mechanisms.

Abstract: The present invention is a generative event extraction method based on ontology guidance, including: (1) constructing an event ontology knowledge base; (2) designing an event trigger word extraction template and an event argument extraction template; mapping an input event text to a first input sequence, and mapping an input event text integrating an event ontology to a second input sequence; (3) designing a class label mapping function that maps multi-word labels to event types and/or role types; (4) extracting the event ontology corresponding to the input event from the event ontology knowledge base, and constructing the first input sequence and the second input sequence according to the event trigger word extraction template and the event argument extraction template; and (5) predicting, by the event extraction model, the event type and the role type according to the class label mapping function and a processing mechanism thereof, and outputting an event trigger word span and an event argument span.

Abstract: Provided in the present invention is a method for preparing chiral alkyl compounds by the asymmetric hydrogenation reaction of iron complex catalysts catalysing olefins: using the disubstituted olefin shown in formula I as a raw material, atmospheric hydrogen as a hydrogen source, FeX2-8-OIQ complex as a catalyst, and a silane compound and acetonitrile as cocatalysts, and reacting for 12-24 hours under the action of a reducing agent to prepare the chiral alkyl compound shown in formula II. The method of the present invention has mild reaction conditions, simple operation, and high atom economy. In addition, the reaction does not require the addition of any other toxic transition metal (such as ruthenium, rhodium, and palladium), and has great practical application value in the synthesis of drugs and materials. The conversion rate of the reaction is also good, generally reaching >99%, and the enantioselectivity is also high, generally 70-99%.

Abstract: Provided are a silicene quantum dots-containing siloxene thin film and a preparation method therefor, which belong to the field of fluorescent functional nanomaterials. A siloxene thin film embedded with silicene quantum dots is prepared by uniformly mixing CaSi2 with a decalcification organic solvent and a transition metal chloride catalyst in a proportion, performing acid washing, and then performing ultrasonic dispersion. The thickness of such siloxene thin film is less than 1 to 2.5 nm, the size of the silicene quantum dots is 2 to 5 nm. In addition, the siloxene thin film has strong fluorescence emission performance in a blue light region, has a pseudodirect band gap, and shows a good application prospect in the fields of photoelectricity and the like.