Abstract: Disclosed are devices, systems and methods for precoding and decoding polar codes using local feedback are described. One example method for improving an error correction capability of a decoder includes receiving a noisy codeword vector of length n, the codeword having been generated based on a concatenation of a convolutional encoding operation and a polar encoding operation and provided to a communication channel prior to reception by the decoder, performing a successive-cancellation decoding operation on the noisy codeword vector to generate a plurality of polar decoded symbols (n), generating a plurality of information symbols (k) by performing a convolutional decoding operation on the plurality of polar decoded symbols, wherein k/n is a rate of the concatenation of the convolutional encoding operation and the polar encoding operation, and performing a bidirectional communication between the successive-cancellation decoding operation and the convolutional decoding operation.

Abstract: A large-scale MIMO (Multiple-Input Multiple-Output) wireless transmission method for millimeter wave/Terahertz networks is provided. In order to reduce the interruption of propagation in the millimeter wave/Terahertz band, a plurality of cells are combined into a wireless transmission network, the base station in each cell is equipped with a large-scale antenna array, and a unitary transformation matrix is used to achieve large-scale beam coverage for user terminals in the entire network. Moreover, in order to reduce the influence of the multipath and Doppler effects on transmission performance, received signals are synchronized for time and frequency in each receiving beam of a user terminal. The method allocates power for signal transmission according to the statistic information of synchronized equivalent channels, and gives an optimal power allocation matrix by iterative solution based on the CCCP (concave-convex procedure) and the deterministic equivalent method.

Abstract: A method for synthesizing a copper-silver alloy includes an ink preparation step, a coating step, a crystal nucleus formation step and a crystal nucleus synthesis step. In the ink preparation step, a copper salt particle, an amine-based solvent, and a silver salt particle are mixed, thereby preparing a copper-silver ink. In the coating step, a member to be coated is coated with the copper-silver ink. In the crystal nucleus formation step, at least one of a crystal nucleus of copper having a crystal grain diameter of 0.2 ?m or less and a crystal nucleus of silver having a crystal grain diameter of 0.2 ?m or less is formed from the copper-silver ink. In the crystal nucleus synthesis step, the crystal nucleus of copper and the crystal nucleus of silver are synthesized.

Abstract: A method for designing an impeller with a small hub-tip ratio includes the following steps: S1: obtaining an outer diameter D of the impeller with the small hub-tip ratio; S2: determining the number of blades and an airfoil of the blade of the impeller with the small hub-tip ratio; S3: obtaining a blade solidity sy at a rim of the impeller with the small hub-tip ratio and a blade solidity sg at a hub of the impeller with the small hub-tip ratio; S4: dividing the blades of the impeller with the small hub-tip ratio into m cylindrical sections in an equidistant manner, marking the cylindrical sections as 1-1, 2-2, . . . , m-m in sequence from the hub to the rim, and obtaining an airfoil setting angle ?L of each of the cylindrical sections; and S5: performing a correction on the value of the airfoil setting angle ?L in S4.

Abstract: A method and system for segmenting touching text lines in an image of a uchen-script Tibetan historical document are provided. The method includes: first obtaining a binary image of a uchen-script Tibetan historical document after layout analysis; detecting local baselines in the binary image, to generate a local baseline information set; detecting and segmenting a touching region in the binary image according to the local baseline information set, to generate a touching-region-segmented image; allocating connected components in the touching-region-segmented image to corresponding lines, to generate a text line allocation result; and splitting text lines in the touching-region-segmented image according to the text line allocation result, to generate a line-segmented image. In the present disclosure, touching text lines in a Tibetan historical document can be effectively segmented, and text line segmentation efficiency of the Tibetan historical document is improved.

Abstract: Other Metals are uniformly doped in a sodium transition metal oxide particle to obtain a cathode active material. As a result, it is possible to improve the battery performance by improving the physical properties of the material itself and stabilizing the structure during the charge/discharge process as well as electrochemical properties.

Abstract: A color-changing product includes a fabric. At least a portion of the fabric includes or is arranged using at least one of (i) a color-changing fiber or (ii) a color-changing yarn including the color-changing fiber. The color-changing fiber includes an electrically conductive core having a first tensile strength, a reinforcement core having a second tensile strength that is greater than the first tensile strength, and a coating disposed around and along the electrically conductive core and the reinforcement core. The coating includes a polymeric material having a color-changing pigment.

Abstract: The present disclosure provides methods for generating MAGE-B2 specific T cells and compositions comprising engineered MAGE-B2-specific T cell receptors. Further provided are methods of treating cancer comprising administering the MAGE-B2-specific T cells.

Abstract: A method of preparing hydrodesulfurization catalysts having cobalt and molybdenum sulfide deposited on a support material containing mesoporous silica. The method utilizes a sulfur-containing silane that dually functions as a silica source and a sulfur precursor. The method involves an one-pot strategy for hydrothermal treatment and a single-step calcination and sulfidation procedure. The application of the hydrodesulfurization catalysts in treating a hydrocarbon feedstock containing sulfur compounds to produce a desulfurized hydrocarbon stream is also specified.

Abstract: Example implementations include a sensor device with a superhydrophobic sensor panel having an abraded first planar surface and a second planar surface opposite to the first planar surface, and a metallic heating element adjacent to the second planar surface of the superhydrophobic sensor panel. Example implementations also include a method of detecting a concentration of heavy metal ions in a solution, by separating a target solute of a target microdroplet from the target micropdroplet, identifying a distribution area of at least one heavy metal ion in an image of the target solute, generating a heavy metal ion concentration quantity based on the distribution area, generating a composite image including an indication of the distribution area, and presenting an indication of at least one of the heavy metal ion concentration quantity and the composite heavy metal ion image.

Abstract: A method for stimulating a well includes mixing at least one thermochemical with fracturing fluid to create a fracturing fluid mixture, injecting the fracturing fluid mixture into the well, creating an exothermic reaction with the fracturing fluid mixture, generating a pressure pulse in the well from the exothermic reaction, and fracturing a formation around the well with pressure from the pressure pulse and a hydraulic pressure source.

Abstract: Disclosed are a MWW/DDR type gas separation membrane comprising at least one MWW type zeolite and at least one DDR type zeolite and a method for preparing the same. One of the MWW type zeolite and the DDR type zeolite is disposed on the other thereof, wherein at least one of the MWW type zeolite and the DDR type zeolite is epitaxially grown. In the gas separation membrane, the DDR type zeolite is epitaxially grown from the MWW type zeolite, or the MWW type zeolite is epitaxially grown from the DDR type zeolite. Thus, the MWW/DDR type gas separation membrane is synthesized using a structural continuity of the MWW type zeolite and the DDR type zeolite. Thus, the gas separation membrane has excellent separation efficiency.

Abstract: The present invention discloses a biodetector based on an interference effect of a thin film with ordered porous nanostructures. The biodetector includes a detection cell, a sensing unit disposed in the detection cell, and an optical fiber spectrometer for detecting reflectometric interference spectra of the sensing unit, wherein the sensing unit is an ordered porous thin film provided with three-dimensional ordered nanopores, and diameters of the nanopores are 20 nm-500 nm. The present invention further discloses a method for using the biodetector to detect biomolecules.

Abstract: The present invention discloses a thin-film light-emitting device including a charge generating junction layer and a method of fabricating the thin-film light-emitting device. The thin-film light-emitting device including a charge generating junction layer according to one embodiment of the present invention includes a negative electrode; at least one light-emitting unit formed on the negative electrode and including a charge generating junction layer, an electron injection/transport layer, a thin-film light-emitting layer, and a hole injection/transport layer in a sequential order; and a negative electrode formed on the light-emitting unit.

Abstract: The invention relates to a water level prediction system for a dam. The system includes a water level prediction module which is configured to (a) receive time series data, which relates to a water level of the dam, in real-time; and (b) predict, in real-time, a future water level of the dam by processing the received time series data in one or more predictive models/formula(s)/algorithm(s). The one or more predictive models/formula(s)/algorithm(s) may include a recurrent neural network (RNN) or RNN model/algorithm which is configured/trained to predict, in real-time, a future water level of the dam by using the received time series data in the RNN or RNN model/algorithm. The water level prediction module may also include at least one statistical model/algorithm which is configured/trained to predict, in real-time, a future water level of the dam by using the received time series data in the statistical model/algorithm.

Abstract: The present invention provides a high-performance lithium-containing organic sulfur electrode material and a preparation method of an integrated flexible electrode. According to the present invention, 1,3-diisopropenyl benzene with diene bonds and Li2S6 are used as precursors to react to generate the lithium-containing organic sulfide Poly (Li2S6-r-DIB) through an in-situ polymerization method. The synthesized lithium-containing organic sulfide Poly (Li2S6-r-DIB) can be directly attached to a flexible conductive carbon cloth to prepare the integrated flexible electrode due to its good viscosity when heated to a certain temperature. The obtained flexible electrode has the advantages of high capacity, high flexibility, stable structure and the like.

Abstract: A method of simultaneously modifying degradation rates of at least two compounds including a first compound having a first unmodified degradation rate constant k1 and a second compound having a second unmodified degradation rate k2 is provided. The method includes combining a first composition including the first compound with a second composition including the second compound, degrading the first compound and forming a first degradation product; and degrading the second compound and forming a second degradation product. The second degradation product modifies the first unmodified degradation rate constant k1 of the first compound to a first modified degradation rate k1? and the first degradation product modifies the second unmodified degradation rate k2 of the second compound to a second modified degradation rate k2?. Compositions resulting from the method are also provided.

Abstract: In one embodiment, a method for recovery of an oil from a porous medium comprises contacting the porous medium with an aqueous nanofluid, solubilizing oil from the porous medium via the nanoparticles, thereby forming a dispersion comprising the oil and the aqueous nanofluid, and collecting at least some of the dispersion. The aqueous nanofluid may contain a combination of amphiphilic quantum dots and hydrophilic quantum dots, in a continuous phase. At least 90% of the quantum dot nanoparticles may have an aspect ratio of from 1:1 to 1:6. The dispersion comprising the oil and the aqueous nanofluid may be stabilized via synergistic effects resulting from the combination of amphiphilic quantum dots and hydrophilic quantum dots. In another embodiment, a method for recovery of an oil from a porous medium whereby the quantum dots are added to foaming surfactants to enhance foam lamella stability under reservoir conditions and provide conformance and mobility control in porous media and hydraulic fractures.

Abstract: A curved surface processing method for an inlet edge of a cylindrical blade of a centrifugal pump impeller includes following steps. A center of an impeller is used as a center to draw circles having respective diameters. A first point having a first distance from the center is determined on a concave side curve at a top of the blade, and a second point having a second distance from the center is determined on a concave side curve at a bottom of the blade. By improving the shape of a blade in an impeller, the angle of an inlet edge at the top of the blade is more close to the tangent direction, and the inlet angle of the top blade is reduced. A twisted surface is formed between a first arc segment at the top and a second arc segment at the bottom.

Abstract: A method of preparing hydrodesulfurization catalysts having cobalt and molybdenum sulfide deposited on a support material containing mesoporous silica. The method utilizes a sulfur-containing silane that dually functions as a silica source and a sulfur precursor. The method involves an one-pot strategy for hydrothermal treatment and a single-step calcination and sulfidation procedure. The application of the hydrodesulfurization catalysts in treating a hydrocarbon feedstock containing sulfur compounds to produce a desulfurized hydrocarbon stream is also specified.