5results about How to "Noise control" patented technology

The utility model relates to hidden rail adjusting screw automatic feeding technology field, more specifically, it relates to a screw automatic sequencing feeding device, including frame, storehouse, belt material spare, sweep material spare, push material spare, unloading slide, storehouse assembly is in the frame and is used to place screw, and the belt material spare is located in the storehouse and moves along the vertical of storehouse to and fro, the top wall of belt material spare is equipped with the clamping groove, the clamping groove is used to place the stem of screw, and the sweep material spare is located on the storehouse and moves along the transverse of storehouse to and fro, and the push material spare is set up in the longitudinal both sides of storehouse with unloading slide, and in the vertical of storehouse all are located between sweep material spare and belt material spare, when the belt material spare rises to the preset height, the sweep material spare transverse movement is used for sweeping back the screw of belt material spare on the reverse state to the storehouse, and the push material spare is used for pushing the screw of belt material spare on the front state and moves to unloading slide, the utility model discloses a screw automatic sequencing feeding device has the effect of reducing processing noise, reduces equipment cost.

The present application relates to magnetic power brake structure and load release device, including piston cylinder; air pressure release structure; magnetic transmission device, which is driven by high pressure gas and moves along the side wall of the piston cylinder, which structure includes the outer magnetic ring group and the inner magnetic ring group with magnetism; brake conductor ring, which is a magnetic conductive structure and is sleeved on the piston cylinder. The present application has compact and reasonable structure, and is convenient to operate. By using high pressure gas as power source, the inner magnetic ring group is driven to work, and the outer magnetic ring group is driven to move in the same direction, so that the purpose of releasing load is achieved by using magnetic force transmission principle. Meanwhile, by designing parameters such as release device exhaust parameter, inner and outer magnetic ring parameter and brake conductor ring parameter, the load release process speed, overload and noise can be effectively controlled. The side pulling type single-stage piston cylinder underwater load release device designed by the present application adopts twice air intake mode, which can greatly release the energy distribution of the process, and significantly reduce the release overload and flow noise.

The invention provides a noise reduction partition wall for a rail locomotive, the noise reduction partition wall comprises a bottom plate, a panel and a honeycomb interlayer arranged between the bottom plate and the panel, the honeycomb interlayer comprises a plurality of honeycomb noise reduction units, each honeycomb noise reduction unit comprises an interlayer pipe, a first horn structure arranged at the first end of the interlayer pipe and a second horn structure arranged at the second end of the interlayer pipe, the first horn structure extends from the first end in the axial direction of the interlayer pipe, and the first horn structure is provided with a first opening; the orthographic projection of the first end on the bottom plate is within the orthographic projection of the first opening on the bottom plate, the second horn structure extends from the second end in the axial direction of the interlayer pipe, the second horn structure is provided with a second opening, and the orthographic projection of the second end on the bottom plate is within the orthographic projection of the second opening on the bottom plate; holes are formed in the surface of each honeycomb noise reduction unit, and the diameter of each hole is smaller than 10 mm.

The application provides a kind of RAG knowledge base retrieval threshold self-adapting dynamic optimization method and system thereof, comprising reading system basic configuration parameter, and based on parameter dynamic calculation maximum shard containing number;Load test question set, execute threshold step scanning to generate candidate threshold;For each candidate threshold, retrieve test question, record the original data of retrieval result under each candidate threshold;Statistical analysis is carried out on the retrieval result, and effective coverage rate and average result number are calculated;Apply constraint-based nonlinear scoring algorithm, combine effective coverage rate and average result number, and introduce load adaptability as penalty boundary, calculate the comprehensive score of each candidate threshold;According to the comprehensive score result, output the threshold with the highest score as the recommended parameter, and generate an analysis report containing the recommended reason.The application effectively controls the context noise and Token cost input to the large model while ensuring the retrieval recall rate, and realizes the automatic performance optimization of RAG system.

The utility model discloses a kind of all-terrain skin side bicycle outer tire tread structure and bicycle outer tire, belong to tire technical field, its structure includes shoulder and crown, wherein: the two sides of the crown are connected shoulder. Anti-skid pattern piece one, anti-skid pattern piece two and anti-skid pattern piece three are equipped on the shoulder. First pattern piece, second pattern piece, third pattern piece, fourth pattern piece, fifth pattern piece are equipped on the crown, and according to square diagonal cutting configuration transverse, longitudinal repetition, regular arrangement. The utility model adopts "Mediterranean" pattern design, and the tread pattern piece is relatively shallow rolling belt, and is matched with serrated transverse, longitudinal pattern groove, improves the grip when turning under the premise of not obvious increase rolling resistance;Shoulder area uses anti-skid granule pattern piece, suppresses water film effect when overbending, maintains lateral grip;Adopt composite pattern system, by local fine pattern, better realize the performance balance of all-terrain rolling resistance and wet road grip;Tread relatively shallow three-dimensional pattern piece staggered arrangement, avoid air turbulence, reduce the noise generated by tread pattern piece and road impact, effectively control noise spectrum;Tread pattern groove is formed air convection by longitudinal and transverse intersection, reduce tire temperature rise when high-speed riding, greatly prolong tire service life.