3results about How to "Solve the cost problem" patented technology

This invention relates to the field of low-rise and multi-story buildings, and more particularly to a hybrid structural building system of reinforced masonry blocks and steel internal frames, comprising: reinforced masonry block walls, a steel frame, floor slabs, and connecting nodes. The reinforced masonry block walls include standard blocks, L-shaped sawn blocks, sawn single pieces, and blocks of equal specifications. Inserts are provided within the holes of the blocks, and reinforcing bars are provided in the horizontal mortar joints or tie beams. Concrete is poured into the holes to form core columns. The steel frame is formed by rigidly connecting steel columns and steel beams. The steel beams include beam members, the distal ends of which rest on the reinforced masonry block walls. This invention achieves an organic unity of high seismic performance, good sound and heat insulation, and flexible large-span interior space arrangement. It solves the problems of existing pure steel frame structures, such as large steel consumption, high cost, poor sound and heat insulation, and difficulty in concealing steel columns, as well as the shortcomings of pure reinforced masonry structures, such as dense interior load-bearing walls, limited space layout, and difficulty in later demolition and modification.

The utility model discloses a special nozzle flowmeter for black grey water, which relates to the field of flowmeter structures and comprises a flowmeter body, the flowmeter body is provided with a measuring pipeline, an annular nozzle body is fixed in the measuring pipeline and consists of a conical inlet section and a throat, the inner diameter of the throat is matched with the small diameter of the conical inlet section, and the inner diameter of the throat is matched with the small diameter of the conical inlet section. The throat part is fixedly connected with the small-diameter end of the nozzle body; a flow inlet of the nozzle body is positioned at the front end of the conical inlet section, and a flow outlet of the nozzle body is positioned at the rear end of the throat part; and the outer diameter of the nozzle body is matched with the inner diameter of a measuring pipeline. The utility model meets the flow measurement of black and gray water and similar working conditions, and has higher wear resistance and erosion resistance and longer service life.

The application belongs to but is not limited to the technical field of Blattella germanica prevention and treatment, and discloses a Blattella germanica prevention and treatment method and system based on nanoparticle delivery of lethal gene dsRNA, which comprises the following steps: Blattella germanica lethal gene full-length cloning; plasmid construction and dsRNA expression and purification; and RNAi feeding. The application first confirms an efficient RNAi lethal target point for Blattella germanica, ensures the efficiency of the technical scheme, realizes low-cost and large-scale preparation of an active ingredient of an RNAi insecticide, breaks through the cost bottleneck of commercial application, creatively constructs a nanocomposite delivery system, efficiently overcomes the technical bottleneck of oral delivery of RNAi, and provides an environment-friendly practical prevention and treatment scheme, and has important application value and prospect.