49results about How to "Good anti-noise effect" patented technology

A magnesium-based porous composite material is characterized in that the magnesium-based porous composite material is a metal-based composite material which floating beads with cavities are distributed in the magnesium alloy matrix; the chemical components of the floating bead comprises that SiO<2> which is more than or equal to 53 percent and less than or equal to 33 percent, Al<2>O<3> which is more than or equal to 30 percent and less than or equal to 36 percent, Fe<2>O which is more than or equal to 0 percent and less than or equal to 33 percent, CaO which is more than or equal to 1.5 percent and less than or equal to 3.6 percent and MgO which is more than or equal to 0.5 percent and less than or equal to 4 percent; the weight of the floating bead is 0.3 to 0.4 g / cm3 and the size is 200 to 400 um; the volume percent of the composite material which is occupied by the floating bead is 20 percent to 50 percent; the magnesium matrix component content is that Al which is more than or equal to 7wt percent and less than or equal to 10 wt percent, Zn which is more than or equal to 0.8wt percent and less than or equal to 2wt percent, Ti which is more than or equal to 1wt percent and less than or equal to 2wt percent, Zr which is more than or equal to 0 percent and less than or equal to 0.5wt percent, Sr which is more than or equal to 0 percent and less than or equal to o.5wt percent, Sn which is more than or equal to 0 percent and less than or equal to 1wt percent, Si which is more than or equal to 0 percent and less than or equal to 0.2wt percent, Be which is more than or equal to 0.1wt percent and less than or equal to 0.3wt percent and the rest is magnesium. The magnesium-based micrometer pore composite material of the invention contains inorganic non-metal phase with thin pore and the density of the phase is very small.

The invention refers to a nonlinear digital filter method to process dual noise, especially adopting firmware to design a 'nonlinear digital filter', producing filter effect on the noise of low-frequency radio-controlled timepieces, and having efficacies of overcoming the persecution of pulse-type dual noise, saving extra hardware cost, and preventing the parts from aging and being influenced by environmental factor.

The invention discloses an intelligent environment control system for improving an equipment operation environment. The intelligent environment control system relates to the technical field of environment control systems, and is mainly composed of an acquisition module, a regulation and control system and a monitoring terminal. The intelligent environment control system not only has good heat dissipation and dehumidification effects on a cabinet body, but also provides a good monitoring environment for a monitoring room.