8results about How to "Quick cost" patented technology

The invention discloses an SNP (Single Nucleotide Polymorphism) molecular marker related to sheep fecundity and application of the SNP molecular marker. The SNP molecular marker comprises an SNP1 (Single Nucleotide Polymorphism) and / or an SNP2; the SNP1 is located at a base at the 115747587 site of a chromosome 6 of a sheep reference genome AR-UIRamV2.0 version, and the polymorphism of the SNP1 is T / G; the SNP2 is located at a basic group at the 41419566th site of a chromosome 22 of a sheep reference genome AR-UIRamV2.0 version, and the polymorphism of the SNP2 is A / G. According to the scheme, the SNP molecular marker related to sheep fecundity is provided, sheep with the high fecundity character can be efficiently and accurately identified and screened out, and the marker is high in typing quality, single in copy and high in polymorphism and can be used for sheep fecundity molecular marker assisted breeding.

This application discloses a visible light optical system and a visible light optical lens. The visible light optical system includes a superlens, a first aspherical lens, a second aspherical lens, a third aspherical lens, and a fourth aspherical lens. The first, second, third, and fourth aspherical lenses are arranged sequentially along the optical axis from the object side to the image side. The superlens has a positive optical power. The first aspherical lens has a positive optical power, and both its object-side and image-side surfaces are convex towards the object side. The second aspherical lens has a negative optical power, and both its object-side and image-side surfaces are convex towards the image side. The third aspherical lens has a positive optical power, and both its object-side and image-side surfaces are convex towards the image side. The fourth aspherical lens has a negative optical power. The visible light optical system combines a superlens with a traditional refractive lens, giving it advantages such as low cost, small size, and excellent imaging quality.

The invention discloses a method for creating diploid seedless watermelon by gene editing ClCKI1, and belongs to the technical field of plant genetic engineering breeding. The invention discloses a method for creating diploid seedless watermelon by gene editing ClCKI1, which uses CRISPR / Cas9 technology for the first time to perform targeted editing on the ClCKI1 gene of watermelon, so that its gene function is lost, female gametes are sterile, self-pollination fruits swell normally, double fertilization cannot form zygotes, seeds are aborted, and only a small amount of white-shelled seeds are produced, thereby creating diploid seedless watermelon. Compared with wild-type materials, the edited diploid seedless watermelon plants created by the method of the invention have no obvious phenotypic changes in the vegetative growth stage and male gametes, except for the sterility of female gametes. The method has the advantages of being simple and easy to operate, high efficiency, low cost and short cycle.

The present invention relates to the technical field of road extraction from remote sensing images. The present invention provides a method, device and readable storage medium for extracting roads from remote sensing images based on knowledge distillation, which includes constructing a teacher model and a student model. The neural networks of the teacher model and the student model adopt an encoder-decoder architecture to learn road features. The number of layers of the student model neural network is less than that of the teacher model neural network. The knowledge distillation is performed in the middle layer, and the knowledge distillation in the middle layer is isomorphic distillation. The model outputs the result based on the target training. The problem of large number of parameters and high computational complexity of the traditional method is solved, and real-time reasoning can be completed quickly and accurately to meet the needs of real-time road extraction.

The application discloses a slitting device with dust removal function, which comprises a machine body, a water spraying module, a slitting module and a dust removal module. The machine body is divided into upper and lower shells, and four guide wheels are arranged under the shells. The water spraying module is arranged at the front end of the machine body, a water tank is connected with a water guide pipe through a water pump, the slitting module is connected with a spring suspension at the middle part of the machine body, an oil return system is fixed on the outer wall of the suspension through a platform, an oil pump is connected with an oil tank and a reversing valve, the reversing valve is arranged at the bottom of the platform, the reversing valve is connected with an oil return cylinder and fixed on the side of the platform, the oil return cylinder is connected with the spring suspension, the two oil return cylinders of the oil return system are connected with each other, the oil return cylinder is connected with a clutch, the clutch is connected with an input and output shaft, centrifugal blocks are arranged on the output shaft, the input and output shafts are connected through bevel gears, and a belt drive is arranged between the engine and the bevel gears. The dust removal module is arranged at the end of the machine body, the engine is connected with dust removal blades of the dust removal module through a belt drive, the dust removal blades are fixed in a dust removal tank, and a filter screen is arranged on the dust removal port.

The invention discloses a radiation cooling porous ceramic material and a preparation method thereof. The ceramic material is prepared from the following components in percentage by mass: 0 to 30 weight percent of boron nitride nanosheets, 65 to 100 weight percent of silicon nitride and 0 to 5 weight percent of residual silicon. The practical application of building cooling can be met under the combined action of multiple scattering of sunlight by Si3N4, BN and porous ceramic pores and vibration absorption of a B-N bond of BN and an Si-N bond of Si3N4 in a wave band of 8-13 microns, and the building cooling material has a wide application prospect. A combustion synthesis method which is simple in process, efficient, low in cost and nearly zero in energy consumption is adopted, low-cost Si powder and B2O3 powder are used as raw materials, alpha-Si3N4 is used as a diluent, rare earth oxide is used as a sintering aid, and chemical furnace powder (mixed powder of Si and beta-Si3N4) is used for in-situ synthesis of the Si3N4-BN radiation cooling porous ceramic material in a nitrogen atmosphere.

The invention relates to a caisson construction method for a pebble geological residence foundation sump, which comprises the following steps of: arranging wall protection steel pipes at the periphery in a foundation pit, hammering the wall protection steel pipes to be downwards inserted into a pebble bed, and stacking sandbags on the outer sides of the wall protection steel pipes to form a sandbag protection slope to prevent the foundation pit slope from collapsing and prevent fine sand from rushing into the foundation pit. Concrete is poured on the inner side of the retaining wall steel pipe through an underwater concrete self-sinking method, the caisson foundation is formed, the caisson foundation can prevent water in the lower pebble bed from flowing upwards during water pumping, and the flatness of the caisson bottom foundation is guaranteed. According to the construction method, only the water level needs to be lowered to 500 mm below the foundation raft, it can be effectively prevented that when surface water flows into the sump through the pebble bed, a foundation pit slope collapses, a foundation base needs to be cleaned many times, the foundation trench size is increased again, compared with a traditional construction method, the cost is low, the construction period is short, and the construction quality is easy to guarantee. The method is high in practicability, the labor cost and the material cost of a using unit can be reduced, and control over the construction cost, the construction period and the quality of the sump is facilitated.

The present invention discloses a method for creating diploid seedless watermelon by gene editing ClSPO11‑2, and belongs to the technical field of plant genetic engineering breeding. The present invention discloses a method for creating diploid seedless watermelon by gene editing ClSPO11‑2, and for the first time uses CRISPR / Cas9 technology to perform targeted editing on the watermelon ClSPO11‑2 gene, so that meiosis cannot be paired and synaptic, and male and female gametes are sterile, so that the gene function is lost, and the seeds are aborted after double fertilization, thereby creating seedless watermelon at the diploid level. Compared with wild-type materials, the edited diploid seedless watermelon plants created by this method have no obvious changes in phenotype during the vegetative growth stage, except for male and female gamete sterility, and the seedless phenotype can be infinitely propagated by plants edited by Clspo11‑2 / ClSPO11‑2 heterozygous. The method has the advantages of being simple and easy to operate, high efficiency, low cost and short cycle.