Abstract: A quaternary ammonium group-grafted cation resin and a preparation method thereof are provided. The preparation method includes: adding a chloromethylated cross-linked polystyrene (PS) resin, trimethylamine hydrochloride, and a 20% sodium hydroxide aqueous solution successively to a reactor for a reaction under stirring at 30° C. to 40° C.; filtering a resulting reaction solution, followed by washing and drying to obtain a quaternary ammonium group-grafted resin; adding the quaternary ammonium group-grafted resin, 1,2-dichloroethane, silver sulfate, concentrated sulfuric acid, and fuming sulfuric acid successively for a reaction for 1 hour at 50° C. to 60° C., a reaction for 1 hour at 70° C. to 80° C., and a reaction for 5 hours at 115° C. to 125° C.; and cooling a resulting reaction solution to room temperature, followed by diluting, filtering, washing and drying to obtain the quaternary ammonium group-grafted cation resin.

Abstract: Disclosed are a self-adaptive all-fiber laser ultrasonic measuring instrument and a measuring method thereof. The output light of a narrow-linewidth semiconductor fiber laser is split by a polarization controller and a polarization beam splitter to generate detection light and reference light. The detection light and visible light output by an indication laser are irradiated, through a wavelength division multiplexer and a biaxial scanning galvanometer, to a sample under test to generate ultrasonic vibration. The scattered light modulated by the ultrasonic vibration is converged and collected as signal light. The signal light and the reference light are respectively input into an interferometer from two ends of the interferometer in opposite propagation directions. The reference light demodulated by the interferometer generates a feedback control signal for adjusting the measurement performance of the interferometer.

Abstract: A neural network retraining method based on the aging sensing of memristors is provided. For the accuracy rate of hardware online reasoning decreases after cross-array aging, the extreme values of programmable weights under a current aging condition is calculated by using the known aging information of memristor, and a neural network model is retrained according to this, so as to improve the accuracy rate of the current hardware online reasoning. In the process of retraining, network weights exceeding the extreme values of programmable weights are automatically truncated. For the working life of the memristor, the sparsity of derivatives of the neural network is utilized to discard the derivatives with a small absolute value in hardware adjustment process, so as to ensure that the memristor corresponding to small derivatives would not be applied voltage, prevent the aging process of the memristors and prolong the service life thereof.

Abstract: Disclosed are a self-adaptive all-fiber laser ultrasonic measuring instrument and a measuring method thereof. The output light of a narrow-linewidth semiconductor fiber laser is split by a polarization controller and a polarization beam splitter to generate detection light and reference light. The detection light and visible light output by an indication laser are irradiated, through a wavelength division multiplexer and a biaxial scanning galvanometer, to a sample under test to generate ultrasonic vibration. The scattered light modulated by the ultrasonic vibration is converged and collected as signal light. The signal light and the reference light are respectively input into an interferometer from two ends of the interferometer in opposite propagation directions. The reference light demodulated by the interferometer generates a feedback control signal for adjusting the measurement performance of the interferometer.

Abstract: The present invention relates to the field of medicine, and related to an application of a PDE9A inhibitor in the preparation of products having an elevated Treg content, drugs for preventing and treating inflammatory bowel disease, and health care products. The PDE9A inhibitor may improve the secretion of mucosal mucus in an intestinal tract suffering from inflammatory bowel disease, reduce the secretion of TNF-?, IL-6, IL-17 and IL-12/IL-23 pro-inflammatory factors, inhibit DC cell differentiation and migration, increase the ratio Foxp3+Treg cells, promote the movement of CD4+CD25+ Treg cells from the spleen and mesenteric lymph nodes to the colon, thereby inhibiting an intestinal inflammatory response and controlling the occurrence and development of the disease.

Abstract: Disclosed is a method for monitoring vehicle overload based on gravity anomaly, which includes the following steps of: setting a plurality of measuring positions on a single lane, arranging a gravimeter to acquire gravity anomaly values caused by a vehicle when the middle position along the length direction of the vehicle reaching each measuring position, using a monitoring camera to judge the category of the vehicle, acquire three geometric dimensions of the vehicle, and determine the position of the vehicle. The vehicle is simplified as a cuboid, and the mass density distribution is simplified as a piecewise constant function along the length direction of the vehicle. Calculating values of the piecewise constant function according to the gravity anomaly values, calculating a total weight of the vehicle according to the mass density distribution, comparing the total weight with the weight limit of the vehicle to judge whether the vehicle is overloaded.

Abstract: The invention relates to an intelligent multi-pollutant ultra-low emission system and a global optimization method thereof. The intelligent multi-pollutant ultra-low emission system comprises a device layer, a sensing layer, a control layer and an optimization layer from bottom to top.

Abstract: In the present invention, a multi-stage foam sound-absorbing black body material is provided for the first time. A graphene aerogel is introduced into a commercialized polymer foam skeleton by using a solvent plasticizing and foaming technology, so as to embed ultra-thin graphene drums in the foam skeleton. When sound waves enter the foam black body, a large number of graphene drums generate a severe resonance effect, thereby rapidly achieving attenuation of the sound waves, and combined with the friction loss of the porous structure of the polymer foam on the sound waves, excellent sound-absorbing performance is achieved in a wide frequency range. The present solution is provided on the basis of commercialized foam materials, has a simple method, low costs, and the potential of wide industrial application.

Abstract: Provided is a video-based method and system for accurately estimating heart rate and facial blood volume distribution, and the method mainly comprises the following steps: firstly, carrying out face detection of video frame containing human face, and extracting face image sequence and face key position points sequence in time dimension; secondly, compressing these sequence of face image and face key position points to obtain the facial signals in time dimension; thirdly, estimating facial blood volume distribution by facial signals mentioned in third step; finally, estimating heart rate values by using model based on deep learning technology and the spectrum analysis method respectively, then fusing the estimation results by Kalman filter to promote the accuracy of heart rate estimation.

Abstract: A method for asymmetrically preparing L-phosphinothricin by oxidation-reduction reaction through biological multienzyme coupling, where D,L-phosphinothricin as a raw material is catalyzed by an enzyme catalysis system to obtain L-phosphinothricin, wherein the enzyme catalysis system comprises a D-amino acid oxidase mutant for catalyzing D-phosphinothricin in D,L-phosphinothricin into 2-carbonyl-4-[hydroxy(methyl)phosphono] butyric acid and a transaminase for catalytic reduction of the 2-carbonyl-4-[hydroxy(methyl)phosphono] butyric acid into L-phosphinothricin; the D-amino acid oxidase mutant is obtained by mutation of D-amino acid oxidase in wild strain Rhodotorula taiwanensis at one of the following sites: (1) M213S-N54V-F58E; (2) M213S-N54V-F58E-D207A; (3) M213S-N54V-F58E-D207A-S60T.

Abstract: A method for separating mixed xylene includes steps that the mixed xylene is subjected to adsorption separation by means of an adsorbent having a metal organic framework material, so that one or more of xylene isomers are separated out. An organic ligand in the metal organic framework material is 2,5-dihydroxy-1,4-benzoquinone. Xylene isomers can be effectively separated using this method.

Abstract: The present invention discloses an Er doped Ga2O3 film, together with its preparation method and the application in the field of luminescence. The preparation method contains steps of: (1) the films are deposited by means of Radio-Frequency magnetron sputtering onto the heated substrates after the pre-sputtering for at least 5 minutes, selecting Er doped Ga2O3 target or Er and Ga2O3 targets, with the ambient of Ar and O2; (2) the films as prepared in step (1) are thermally treated at the temperature higher than 300° C. in the ambient of O2 or N2, in order to optically activate Er3+ and crystalize Ga2O3 hosts meanwhile, followed by natural cooling, obtaining the Er doped Ga2O3 films as described. The preparation technology of the present invention is simple, with a good process compatibility. It is believed that the present invention will be widely used in the field of silicon-based integrated light sources, semiconductor luminescence, optical communication, with broad application prospects.

Abstract: An unpowered cowl with adjustable fan blades and a waste heat recovery system for cooking fumes include a cowl body, lifting mechanisms, and a pressure sensor. The cowl body includes a top cap, a bottom ring, and the fan blades disposed between the top cap and the bottom ring. The pressure sensor is disposed on an inner wall of the top cap. An upper end of each of the fan blades is disposed above the top cap and slightly exceeds an outer edge of the top cap. The lifting mechanisms are annularly disposed on the top cap. The lifting mechanisms include lifting plates, electric pushing rods, and lifting shafts. The electric pushing rods are fixed on the top cap. The lifting shafts are connected to the fan blades. The electric pushing rods and the pressure sensor are electrically connected to a control box.

Abstract: The present disclosure provides a method and device for performing signal communication based on a levitated particle. In one example, the method includes: preparing a levitated state of the particle; regulating and measuring a net charge quantity carried by the levitated particle; calibrating electromagnetic response characteristics of the levitated particle; applying an electromagnetic communication signal; obtaining and demodulating the electromagnetic communication signal.

Abstract: The present invention provides a metal platinum (II) and palladium (II) complex, an organic light-emitting device and a display or lighting apparatus, wherein a structure of the metal platinum (II) and palladium (II) complex is as shown in the following formula (I). A cyclometalated platinum (II) and palladium (II) complex based on a tetradentate ligand according to the present invention contains molecules having relatively strong rigidity, can effectively inhibit non-radiative transition generated by molecular vibration, and has relatively high quantum efficiency and luminous intensity. Meanwhile, a tetradentate phosphorescent metal complex of the present invention is a novel parent nucleus structure, which may be developed into a series of efficient phosphorescent metal platinum complexes. The present invention has excellent application prospects in the fields of OLED display and lighting and the like, especially in the field of light-emitting layer materials.

Abstract: The present disclosure provides an in-situ testing system of metal materials under high temperature and complex loads. The testing system includes a fatigue testing unit, a high-temperature loading unit, a signal detecting unit and a base. The fatigue testing unit is configured for pre-tightening a sample and then performing a fatigue testing on the sample. The high-temperature loading unit is configured for heating the sample to a high temperature. The signal detecting unit includes a pressure sensor and a displacement sensor. The pressure sensor is configured for monitoring the tensile force on the sample. The displacement sensor is configured for monitoring the displacement of the sample after being stretched during the pre-tightening of the sample. The base is configured for bearing the fatigue testing unit, the high-temperature loading unit and the signal detecting unit, and can be positioned on a scanning electron microscope stage or an open microscopic device.

Abstract: The disclosure isolates and identifies a peptide PEP1 that regulates plant root development and a gene OsPEP1 encoding the same. Exogenous application of PEP1 could inhibit the plant root development. A recombinant expression vector containing the gene or part of the DNA of the gene is obtained, and a transgenic plant with altered root growth and development is obtained by transforming with the recombinant expression vector. Therefore, the peptide can be used as a plant growth regulator, and the gene encoding the same and precursor protein thereof can be used as a potential molecular breeding target for crop improvement, for example, improving crop yield by regulating the growth and development of crop roots.

Abstract: An Agrobacterium-mediated genetic transformation method for sea barleygrass is provided. The method includes: S1, selecting immature embryo materials of sea barleygrass with immature embryos each having a length in a range of 0.5-1.0, sterilizing them with alcohol and sodium hypochlorite to obtain sterilized seeds; S2, separating the immature embryos, crosscutting the immature embryos, and inducing callus generation and proliferation; S3, adjusting pre-culture time and Agrobacterium infection time of calli based on the callus generation and Agrobacterium growth to thereby prevent excessive Agrobacterium liquid; and S4, performing adventitious bud induction culture and rooting induction culture under a shielding-formed low-light environment to obtain tissue culture plantlets. It relates to a tissue culture method for immature embryos of sea barleygrass with high green spot differentiation and plantlet formation rates, which is not limited by materials.

Abstract: A method for processing a video data stream, a video decoding apparatus, and a method for encoding data stream are provided. The method includes: receiving a video data stream; generating a layer list using at least the patch-layer association information, the layer list including a first layer associated with the first view, the first layer being based on a first depth of the first view; assigning a first layer identification to the first layer; updating the view list section by adding the first layer as a second view; selecting a first target view for rendering on an output device; selecting one or more patches using at least the layer list and the patch list section; combining the selected one or more patches to form a first intermediate output frame; and performing post processing using at least the view list section.

Abstract: A pneumatic proportional valve includes a torque motor and a pneumatic rotary valve. The torque motor includes permanent magnets, magnetically permeable yokes, an upper armature, a lower armature, an upper skeleton, a skeleton column, a lower skeleton, an exciting coil, a coil skeleton, a spring support, a spring plate and load springs. The torque motor has a single coil structure with an axis of the exciting coil coinciding with a rotation axis of the armatures, and the coil is arranged between the upper armature and the lower armature. The torque motor has the upper armature and the lower armature, and the upper armature and the lower armature have a total of four armature arms, which can form eight air gaps with an upper one and a lower one working in pair, form four pairs of magnetic circuits in parallel with each other under the excitation of a control coil.