Abstract: A dynamic facial expression recognition (FER) method based on a Dempster-Shafer (DS) theory improves a feature extraction effect of an expression video through multi-feature fusion, and deeply learns an imbalanced dynamic expression feature by using the DS theory, multi-branch convolution, and an attention mechanism. Compared with other methods, the dynamic FER method scientifically and effectively reduces an impact of sample imbalance on expression recognition, fully utilizes a spatio-temporal feature to mine potential semantic information of the video expression to perform expression classification, thereby improving reliability and accuracy and meeting a demand for the expression recognition.

Abstract: The present invention provides an energy-storing temperature control material, and belongs to the technical field of temperature control materials. In the energy-storing temperature control material provided in the present invention, the organic synthetic fiber based phase-change material has a three-dimensional dispersion effect, and can form a network constraint for remaining phase-change materials to reinforce mechanical properties of the materials, thereby fixing shapes of the materials and avoiding a liquid-crystal phase separation phenomenon in the phase-change process. The phase-change energy storage agent can absorb and release the heat by means of solid-liquid phase conversion of the material, to achieve the temperature control effect; and the phase-change temperature regulator can regulate a phase-change temperature range of the phase-change material, to make the energy-storing temperature control material suitable for climatic features of northern China.

Abstract: Provided a method for in situ synthesizing ultrafine and highly loaded Ag NPs on the surface of tannin-coated phenolic resin microspheres, the method comprises: (1) preparing phenolic resin microspheres by hydrothermal solvent method; (2) stirring a mixed phase of the phenolic resin microspheres and a tannin solution under a alkaline condition at room temperature to obtain tannin-coated phenolic resin microspheres; (3) adding the tannin-coated phenolic resin microspheres to a silver ammonia solution to obtain a composite that being loaded with Ag NPs on the surface of tannin-coated phenolic resin microspheres. Ag NPs in the composite are ultrafine and highly loaded. The raw materials of the method are low price, and the preparation process is extremely simple and environmentally friendly. In addition, the tannin coating technology is also suitable for other nanomaterials, such as SiO2, TiO2 and Fe3O4, etc., and has good application prospects and market potential.

Abstract: The present invention discloses an industrial equipment operation, maintenance and optimization method and system based on a complex network model. The method includes the following steps: obtaining data of all sensors of industrial equipment, and calculating a Spearman correlation coefficient between data of every two of the sensors within the same time period; using each sensor as a node, and using the Spearman correlation coefficient as a weight of a network edge, to construct a fully connected weighted network; and obtaining, when an adjustment instruction for a target feature is received, a currently optimal parameter adjustment path of the target feature based on the fully connected weighted network. In the present invention, production equipment in reality is digitized to construct a complex network oriented to industrial big data. An optimal path for equipment parameter tuning may be found by using the network, thereby reducing dependence of an enterprise on a domain expert.

Abstract: The present disclosure relates to a method for preparing an unbleached biomechanical pulp and fully utilizing by-products by treating wheat straws with heat steam in synergy with biological enzymes, which belongs to the technical field of papermaking technology and waste comprehensive utilization. The present disclosure provides a method for preparing an unbleached biomechanical pulp by treating whole wheat straws with heat steam in synergy with biological enzymes, where the prepared high-strength biomechanical pulp can meet the requirements of producing unbleached packaging paper and paper-based materials. At the same time, the by-products are recycled to prepare a biomass compound fertilizer, which turns solid waste into treasure and realizes the high-value full utilization of wheat straw. Therefore, the method in the present disclosure is simple, green, clean and efficient, which has good practical application value and broad application prospects.

Abstract: A method for manufacturing a flexible sensor, including: dispersing graphene in a polymeric material; adding a carbon nanotube into the polymeric material; applying an alternating electric field to the polymeric material added with the carbon nanotube to obtain a composite material; attaching a polymeric material film to the obtained composite material; pre-embedding carbon fibers; and heating and curing to obtain a sensor. A CNT bridging effect and an electric field induced arrangement are introduced at an appropriate ratio of polymeric materials such as graphene-PDMS or PMMA to improve a dry-blended method. The flexible sensor manufactured by the improved dry-blended method improves electrical conductivity, a piezoresistive property and a mechanical property of CNT-graphene-PDMS or PMMA and other polymeric materials.

Abstract: A heat-resistant and soluble magnesium alloy, and a preparation method having an elemental composition at the following atomic percentage: Lu 0.10% to 8.00%, Ce 0.001 to 0.05%, Al 0.10% to 0.60%, Ca 0.001% to 0.50%, Cu 0.01% to 1.00%, Ni 0.01% to 1.00%, impurity elements <0.30%, and the rest is Mg, and formed in magnesium alloys are high temperature phase of Lu5Mg24, Mg2Cu, Mg2Ni, Mg12Ce, Al11Ce3 and (Mg, Al)2Ca, and Long Period Stacking Ordered (LPSO) phases as Mg—Lu—Al and Mg—Ce—Al. The magnesium alloy has good mechanical performances at 150° C., and a dissolution rate of 30 to 100 mg·cm?2h?1 in a 3% KCl solution at 93° C.

Abstract: A method for preparing a cyclodextrin metal organic framework (CD-MOF) stable in aqueous phase, including: dissolving ?-cyclodextrin and solid potassium hydroxide in deionized water followed by magnetic stirring and ultrasonic treatment at room temperature, addition of methanol and stirring to obtain a reaction mixture; filtering the reaction mixture with a polytetrafluoroethylene membrane filter in a beaker; placing the beaker in methanol vapor to form a ?-CD-MOF crystal; washing the ?-CD-MOF crystal with ethanol followed by centrifugation and vacuum drying to obtain ?-CD-MOF; preparing a ?-CD-MOF-active substance complex by impregnation; and preparing an active substance-loaded ?-CD-MOF-Tween 80 complex by physical adsorption modification followed by washing with anhydrous ethanol and vacuum drying.

Abstract: The present invention provides a Lactococcus lactis subsp. lactis A32, derived product and use thereof, the present invention falls in the technical field of microorganisms. In the present invention, the Lactococcus lactis subsp. lactis A32 is obtainable by compound mutation on the basis of the original strain L. lactis lxl. Experiments showed that, compared with nisin titre of the original strain L. lactis lxl, the Lactococcus lactis subsp. lactis A32 has high nisin yield, and the nisin titre has been improved for 3˜4 times (over 5066.58 IU/mL); in the meanwhile, the growth curve of the Lactococcus lactis subsp. lactis A32 is slightly longer than the original strain L. lactis lxl and biomass peaks of them are basically consistent. The present invention has laid a foundation for large scale production of nisin.

Abstract: A carbon cloth/gallium oxynitride has a chemical formula of GaOxNy, where x=0.1-0.3 and y=0.7-0.9; and has a N/O molar ratio of 2.3 to 9. The carbon cloth/gallium oxynitride is a composite formed by loading gallium oxynitride nanoparticles on carbon cloth fibers, wherein the gallium oxynitride nanoparticles have a size range of 10 to 70 nm, and the carbon cloth/gallium oxynitride has a discharge specific capacitance of 30 to 865 mF cm?2 at current densities ranging from 0.5 to 100 mA cm?2. The working electrode is made from the carbon cloth/gallium oxynitride; and the supercapacitor is composed of the carbon cloth/gallium oxynitride working electrodes, a separator, an electrolyte, and an outer package.

Abstract: In the field of image encryption and decryption, in order to solve the problem of small key space in the encryption process caused by low dimension of one-dimensional chaotic map and few initial values and control parameters, the present disclosure provides an image encryption and decryption communication algorithm based on two-dimensional lag complex Logistic map, which expands the variables of one-dimensional Logistic map from the real number domain to the complex number domain, improves the dimension of the mapping system, increases the number of keys, and expands the mapping range, wherein the new mapping system is more sensitive to small disturbances of initial values and parameters, which can break the strong correlation between pixels in the original image, so that the pixels of the encrypted image are uniformly distributed in the whole plane, and the features of the original image are hidden.

Abstract: A supercapacitor contains the zwitterionic polymer hydrogel electrolyte. A change rate of a capacitance retention of the supercapacitor, relative to a specific area capacity at 25° C. is less than 25% at extreme temperature. When temperature is increased to 60° C. or reduced to ?30° C. the specific area capacity is changed to 178 mF cm?2 and 134 mF cm?2, which are 104% and 78% of that at 25° C. indicating an excellent electrochemical property at the extreme temperature.

Abstract: A bismuth ferrite film material, a method for integrally preparing a bismuth ferrite film on a silicon substrate at a low temperature, and an application, includes: magnetron sputtering a bottom electrode, a buffer layer and a bismuth ferrite film on one surface of a Si substrate in sequence from bottom to top at a processing temperature of 300-400° C.; reducing the temperature to room temperature; and a top electrode is deposited via magnetron sputtering on the surface of the bismuth ferrite film; the buffer layer mentioned hereof is a conductive oxide which matches the lattice of bismuth ferrite and is of a perovskite structure (AB03). According to the present invention, the temperature for preparing the bismuth ferrite film material can be reduced to 450° C. or below, and the bismuth ferrite film material has a high spontaneous electric polarization.

Abstract: A personalized comment recommendation method based on a link prediction model of a graph bidirectional aggregation network. In a user-comment bipartite graph, comment features are aggregated into a user feature. A social network is used to fuse a neighbor feature of a user to obtain an embedding representation of the user. The embedding representation of the user is aggregated into a comment after an original feature of the user is removed, and the embedding representation of the user is adjusted based on a difference before and after comment aggregation. On this basis, a forwarding network is used to calculate a score of an edge based on an inner product of user node features at both ends of the edge, and finally make a recommendation based on the score. Furthermore, a recommendation system converts a comment recommendation task into a link prediction task between users in a small range.

Abstract: The present invention discloses an industrial equipment operation, maintenance and optimization method and system based on a complex network model. The method includes the following steps: obtaining data of all sensors of industrial equipment, and calculating a Spearman correlation coefficient between data of every two of the sensors within the same time period; using each sensor as a node, and using the Spearman correlation coefficient as a weight of a network edge, to construct a fully connected weighted network; and obtaining, when an adjustment instruction for a target feature is received, a currently optimal parameter adjustment path of the target feature based on the fully connected weighted network. In the present invention, production equipment in reality is digitized to construct a complex network oriented to industrial big data. An optimal path for equipment parameter tuning may be found by using the network, thereby reducing dependence of an enterprise on a domain expert.

Abstract: An application of MAL33 gene deletion in improving the tolerance of Saccharomyces cerevisiae to inhibitors in a lignocellulose hydrolyzate is provided. The tolerance of the present MAL33 gene-deleted Saccharomyces cerevisiae strain to acetic acid is greatly improved, and the tolerance of the Saccharomyces cerevisiae strain to other typical inhibitors and H2O2 in the lignocellulose hydrolyzate is also improved. The lag period of the Saccharomyces cerevisiae strain in a glucose and xylose medium (YPDX) with 3.5 g/L acetic acid is shortened by 24 h. The fermentation period of the Saccharomyces cerevisiae strain to produce ethanol through co-utilization of glucose and xylose is shortened by 20 h. The growth of the Saccharomyces cerevisiae strain in a glucose and xylose medium (YPDX) with a mixed inhibitor and the ethanol production of the Saccharomyces cerevisiae strain through the co-fermentation of glucose and xylose are superior to those of a control strain.

Abstract: The present application relates to a method for preparing dissolving pulp by TCF bleaching of poplar KP, including: preparing poplar KP by pre-hydrolysis kraft process with poplar as a raw material, and OZQP bleaching of the poplar KP to obtain dissolving pulp, wherein O denotes oxygen delignification, Z denotes ozone bleaching, Q denotes chelating treatment, and P denotes hydrogen peroxide bleaching. The dissolving pulp prepared by the same exhibits that all indexes can meet the requirements of excellent products in dissolving pulp industry standard (QB/T4898-2015), and most of the indexes are far superior to those of excellent products, and thus it can completely replace imported dissolving pulp.

Abstract: A method for preparing unbleached biomechanical pulp from straw. A straw is used as a raw material, which is treated with alkaline biological enzymes, heated with hot alkali steam, refined, and washed. The mechanical pulp prepared by the method of the present invention has significantly improved ring-crush strength, can be used to prepare corrugated paper or cardboard paper, and can significantly improve the compressive strength of the carton.

Abstract: A hollow spherical cerium dioxide nanomaterial, preparation method and application thereof; wherein the preparation method uses glucose as a carbon source, urea as a precipitant, cerium trichloride as a cerium source, and water as a solvent to prepare a cerium dioxide/carbon composite material by a hydrothermal method, and then, a hollow spherical cerium dioxide nanomaterial with a multi-shell layer structure is obtained by calcination in a muffle furnace. By adjusting the amount of urea and the calcination temperature, a number of shell layers of the material can be adjusted. Moreover, in the nanomaterial, the number of shell layers can be adjusted, large spacing exists between shell layers, specific surface area can be increased, wherein contact area of the material with an electrolyte increases, but also structural collapse caused by a volume expansion of an electrode material during charging and discharging can be alleviated, and the electrochemical performance is effectively improved.

Abstract: Disclosed herein are methods for preparing modified starches, and uses thereof, and relates to the technical field of starch preparation; modifying a gelatinized starch suspension with ?-amylase; after inactivating the ?-amylase, further modifying with a branching enzyme, after inactivating the branching enzyme, further modifying with pullulanase, after inactivating the pullulanase, precipitating a resulting enzymatic hydrolysate with an alcohol to obtain precipitates; and drying the precipitates to obtain the modified starch. The methods disclosed a starch is modified remarkably, herein substantially increase the number of linear chains with a degree of polymerization DP6-11 in the starch chains and, thus, significantly increase the content of resistant starch in the modified starch—thereby facilitating the use in foods and medicaments.