Abstract: The present disclosure provides a method for estimating a body size and weight of a pig based on deep learning, and relates to the technical field of deep learning. The present disclosure predicts the weight of the pig by using a convolutional neural network. Relevant features are learned by the convolutional neural network, and feature engineering extraction is not needed to be established, so that extracted features are more comprehensive, and the convolutional neural network is superior to a linear model in processing of noisy data and nonlinear problems of data. Images of the pig are shot by an ordinary two-dimensional (2d) color camera.

Abstract: Provided is a method for upgrading pyrolysis oil through seawater electrochemical pretreatment of biomass and use thereof. The method includes: (1) crushing and sieving a biomass raw material to obtain a crushed biomass raw material, adding the crushed biomass raw material to a salt solution and mixing to be uniform to obtain a reactant mixture; performing an electrolytic reaction on the reactant mixture under conditions of stirring and an external voltage of 5-15 V for 2-8 hours to obtain a product mixture; after the electrolytic reaction, subjecting the product mixture to a suction filtration, collecting a filter cake, washing the filter cake and drying to obtain a pretreated biomass, and (2) subjecting the pretreated biomass obtained in step (1) to a pyrolysis reaction at a temperature of 400-600° C. for 30-90 minutes in a protective gas atmosphere, and collecting a pyrolysis oil by an organic solvent.

Abstract: Disclosed is a method for producing biogas from a waste liquid/residue after diosgenin extraction by aluminum chloride. Specifically, in a fermentation vessel, an anaerobic sludge and a waste residue from diosgenin extraction by aluminum chloride are added at a volatile solids ratio of (1-3):(1-2), or a seeding sludge and a diosgenin waste liquid are added with an organic loading having a VS:COD ratio of (1-2):(1-2); and then the above components are fermented at 35-37° C. for 5-25 d such that biogas is produced. According to the method of the present invention, the maximum cumulative biogas production rates are 255.4 mL/g VS for waste residue and 326.9 mL/g COD for waste liquid, and throughout the fermentation period, ammoniacal nitrogen values are below 1500 mg/L and pH variation is within the normal range, and the COD removal rate for the fermentation broth is 91.11%.

Abstract: The present invention belongs to the technical field of new energy detection, in particular to a material uniformity detection device and method. The purpose of the present invention is to provide a material uniformity detection device which can meet the requirement of detection of diversified materials such as biomass slurry aiming at the problem of difficulty in quantifying uniformity state of the biomass slurry. The sample pool is driven by the rotating lifting device for lifting and spiral motion, data collection is performed on the sample pool in the form of a certain path, and an image is established for the relationship between a large number of light intensity values of transmission light and heights measured for multiple times to respectively display the uniformity of horizontal layering and uniformity in the vertical direction, to judge the overall uniformity of the material samples.

Abstract: The present disclosure belongs to the technical field of agricultural high-efficiency water-saving irrigation, and relates to a magnetization control apparatus for preventing clogging of a drip irrigation system irrigator and a control method thereof.

Abstract: A method for counting suckling piglets based on self-attention spatiotemporal feature fusion is disclosed, which includes: detecting a side-lying sow in a video frame by using CenterNet to acquire a key frame of suckling piglets and a region of interest of the video frame, and overcome the interference of the movement of non-suckling piglets on the spatiotemporal feature extraction for the region of interest; transforming spatiotemporal features extracted by a spatiotemporal two-stream convolutional network from a key frame video clip into a spatiotemporal feature vector, inputting the obtained spatiotemporal feature vector into a temporal, a spatial and a fusion transformer to obtain a self-attention matrix; performing element-wise product for the self-attention matrix and the fused spatiotemporal features to obtain a self-attention spatiotemporal feature map; and inputting the self-attention spatiotemporal feature map into a regression branch of the number of suckling piglets to complete the counting of the

Abstract: An air pressure-machine vision based system for measuring a rheological property of a viscoelastic material includes a machine body, a lifting experiment table system, an air pressure generation control system, an image collection system, and a controlling and information processing system, where the lifting experiment table system, the air pressure generation control system, the image collection system and the controlling and information processing system are mounted on the machine body; the lifting experiment table system includes a lifting table stepping motor, an L-shaped lifting table and a lifting table motor driver, and the lifting table motor driver is connected to the lifting table stepping motor and configured to drive the lifting table stepping motor; and the lifting table stepping motor is connected to the L-shaped lifting table and configured to control lifting of the L-shaped lifting table.

Abstract: A use of a ZmSBP12 gene in the regulation of drought resistance, plant height, and ear height of Zea mays L. is provided. After the ZmSBP12 gene is over-expressed in Zea mays L., the resulting Zea mays L. mutant plant exhibits increased drought resistance and decreased plant and ear heights. The overexpression of the ZmSBP12 gene leads to increased drought resistance and decreased plant and ear heights, indicating that the ZmSBP12 gene plays a crucial role in the drought resistance and plant type (plant height) of Zea mays L. The expression abundance of the ZmSBP12 gene is increased to improve the drought resistance of Zea mays L. and reduce the plant and ear heights of Zea mays L., which can be used for the assisted breeding of novel drought-resistant and lodging-resistant Zea mays L. varieties and the breeding of excellent inbred lines and hybrids of Zea mays L.

Abstract: The present disclosure discloses a whole avian-origin reverse genetic manipulation system and its use in producing a recombinant H7N9 avian influenza vaccine. The whole avian-origin reverse genetic manipulation system is an eight-plasmid reverse genetic manipulation system based on H5N2 subtype avian influenza D7 virus strain, which is comprised of 8 recombinant plasmids respectively containing PB2, PB1, PA, HA, NP, NA, M and NS gene fragments derived from H5N2 subtype avian influenza D7 virus strain. The genome of the recombinant H7N9 subtype avian influenza vaccine of the present disclosure is comprised of an NA gene and a modified HA gene derived from a highly pathogenic H7N9 subtype avian influenza virus strain, as well as PB2, PB1, PA, NP, M and NS genes derived from H5N2 subtype avian influenza D7 virus strain.

Abstract: A detection device using a lateral flow strip for detection and a detection method thereof are provided, which relates to the technical field of a detection device using a lateral flow strip. An upper rotor, a middle rotor and a lower rotor are respectively provided with upper paddle(s), middle paddle(s) and lower paddle(s) along respective circumferential directions. Each upper paddle is provided with a test tube with openings at both ends thereof for placing the lateral flow strip. The middle paddle blocks a bottom one of the openings of the test tube. Each lower paddle is provided with a sample tube for placing sample solution. The bottom opening of the test tube is opposite to a top opening of the sample tube up and down.

Abstract: An air pressure-machine vision based system for measuring a rheological property of a viscoelastic material includes a machine body, a lifting experiment table system, an air pressure generation control system, an image collection system, and a controlling and information processing system, where the lifting experiment table system, the air pressure generation control system, the image collection system and the controlling and information processing system are mounted on the machine body; the lifting experiment table system includes a lifting table stepping motor, an L-shaped lifting table and a lifting table motor driver, and the lifting table motor driver is connected to the lifting table stepping motor and configured to drive the lifting table stepping motor; and the lifting table stepping motor is connected to the L-shaped lifting table and configured to control lifting of the L-shaped lifting table.

Abstract: A method for maintaining a male sterile plant in a homozygous recessive state includes providing a first plant that includes homozygous recessive male sterility alleles, providing a second plant that includes homozygous recessive male sterility alleles the same as that in the first plant and a nucleotide construct in which the construct exists in a heterozygous state. The first nucleotide sequence of the nucleotide construct encodes a first protein that restores male fertility of the first plant after expression in the first plant. The second nucleotide sequence of the nucleotide construct allows for distinguishing the grains with or without the construct by observation through naked eyes or devices. The first nucleotide sequence and the second nucleotide sequence are tightly connected with each other and coexist in a plant. The method further includes fertilizing female gametes of the first plant with male gametes of the second plant.

Abstract: A key DNA sequence for regulating a maize leaf angle and a mutant thereof are provided, which have polynucleotide sequences shown in SEQ ID No. 1 and SEQ ID No. 2, respectively. The DNA sequence for regulating a maize leaf angle and the mutant thereof provided by present disclosure can regulate the expression of ZmNAC16 gene in a maize pulvinus, and thus can be used for the improvement of maize leaf angle and plant type and further for the cultivation of new maize varieties. The present disclosure further provides specific detection primers for detecting mutations of the DNA key sequence and the mutant, and detection primers for detecting an expression level of ZmNAC16 gene in maize. These detection primers can be used to directionally improve a maize leaf angle and also shows application potential for breeding of dense-planting-tolerant and high-yield maize.

Abstract: The present disclosure discloses a whole avian-origin reverse genetic system, a recombinant H5N2 subtype avian influenza virus, a vaccine containing the virus, and a preparation method and application thereof. The genome of the recombinant virus is comprised of a modified HA gene derived from a highly pathogenic H5N6 subtype avian influenza virus strain, as well as PB2, PB1, PA, NP, NA, M and NS genes derived from H5N2 subtype avian influenza D7 virus strain. The recombinant virus is a recombinant H5N2 avian influenza virus rescued from the D7 virus strain as a backbone, which is an avirulent virus strain with the original immunogenicity, and can maintain a high virus titer during the chick embryo culture process. The recombinant virus fully meets the biological safety requirements and has a good application prospect.

Abstract: The present disclosure discloses a whole avian-origin reverse genetic system, a recombinant H5N2 subtype avian influenza virus, a vaccine containing the virus, and a preparation method and application thereof. The genome of the recombinant virus is comprised of a modified HA gene derived from a highly pathogenic H5N6 subtype avian influenza virus strain, as well as PB2, PB1, PA, NP, NA, M and NS genes derived from H5N2 subtype avian influenza D7 virus strain. The recombinant virus is a recombinant H5N2 avian influenza virus rescued from the D7 virus strain as a backbone, which is an avirulent virus strain with the original immunogenicity, and can maintain a high virus titer during the chick embryo culture process. The recombinant virus fully meets the biological safety requirements and has a good application prospect.

Abstract: The present disclosure discloses a whole avian-origin reverse genetic manipulation system and its use in producing a recombinant H7N9 avian influenza vaccine. The whole avian-origin reverse genetic manipulation system is an eight-plasmid reverse genetic manipulation system based on H5N2 subtype avian influenza D7 virus strain, which is comprised of 8 recombinant plasmids respectively containing PB2, PB1, PA, HA, NP, NA, M and NS gene fragments derived from H5N2 subtype avian influenza D7 virus strain. The genome of the recombinant H7N9 subtype avian influenza vaccine of the present disclosure is comprised of an NA gene and a modified HA gene derived from a highly pathogenic H7N9 subtype avian influenza virus strain, as well as PB2, PB1, PA, NP, M and NS genes derived from H5N2 subtype avian influenza D7 virus strain.

Abstract: The present invention relates to a photo-induced cationic polymerized pure vegetable oil-based polymer and a preparation method and use thereof. The preparation method comprises the following steps: mixing a dry oil, an epoxy vegetable oil and an initiator uniformly, irradiating to initiate a photo-curing reaction, and then placing at ambient temperature, and continuing to a heat-curing reaction so as to obtain a photo-induced cationic polymerized pure vegetable oil-based polymer. In the present invention, vegetable oil resources which are low in price, widespread, and easy to regenerate are used to prepare the pure vegetable oil-based polymers instead of the fossil-derived monomers completely, thereby achieving the efficient use of vegetable oils. In the present invention, an unconventional photo-induced heat frontal polymerization technology is used to prepare the pure vegetable oil-based polymer, thereby achieving a photo-thermal dual curing reaction of a vegetable oil system without heating.

Abstract: The present disclosure discloses design and forming method of a channel of flow-type thin wall drip irrigation belt. The method includes the steps of construction of a double-layer asymmetric channel structure, determination of a structure parameter control threshold and optimal value, design of water inlets and water outlets of the double-layer asymmetric channel structure, proposal of a machining method of a molding wheel matching the double-layer asymmetric structure and an optimization method of a flow-type drip irrigation belt molding process, material modification of a flow-type drip irrigation belt and design of a reasonable formulation, realization the stereotype production of the flow-type drip irrigation belt, etc.

Abstract: The present disclosure discloses a Microcin MccY, and a preparation method and use thereof, wherein the amino acid sequence of the Microcin MccY is GGRGHIAEYFSGPITQVSFYG. Compared with Microcin MccJ25 that only has a bactericidal activity against a small part of serotypes of Salmonella such as Salmonella enteritidis, the Microcin MccY has bacteriostatic/bactericidal effects on Salmonella Pullorum, Salmonella typhimurium, Salmonella kentucky, Salmonella Infantis, Salmonella London, and Shigella sonnei, and can kill other serotypes of Salmonella that MccJ25 cannot kill. Especially, the Microcin MccY has an outstanding bactericidal effect on Salmonella typhimurium and Salmonella Pullorum which are common in livestock and poultry production, and meanwhile it also has bacteriostatic/bactericidal effects on Shigella sonnei. Therefore, the Microcin MccY overcomes the shortcoming of the narrow spectrum of the Microcin, has breakthrough significance, and has the potential as a substitute to antibiotics.

Abstract: Compositions and methods for identifying, selecting and producing maize plants with enhanced ear rot resistance are provided. Ear rot resistance maize plants and germplasms are also provided. In some embodiments, methods of identifying an ear rot resistance maize plant or germplasm are provided. Such methods may comprise detecting, in the plant or germplasm, a marker associated with enhanced ear rot resistance.