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The invention relates to precious metal-doped ZnO nanoscale particles and a use thereof. The precious metal-doped ZnO nanoscale particles are ZnO / Ag and ZnO / Pd nanoscale particles which are prepared from zinc acetate, sodium hydroxide, silver nitrate and palladium chloride by an ethanol auxiliary hydrothermal method, wherein the diffraction peak of ZnO belongs to a hexagonal wurtzite structure; a space crystal group of ZnO belongs to P63mc(186); a point lattice constant a of ZnO is equal to a point lattice constant b of ZnO and is equal to 0.3249nm; a point lattice constant c of ZnO is equal to 0.5205nm; the diffraction peak of Ag is in accordance with a standard map JCPDF:87-0717; a space crystal group of Ag belongs to Fm-3m(225); a point lattice constant a of Ag is equal to a point lattice constant b of Ag, is equal to a point lattice constant c of Ag and is equal to 4.086nm; the diffraction peak of Pd is in accordance with a standard map JCPDF:88-2335; a space crystal group of Pd belongs to Fm-3m(225); and a point lattice constant a of Pd is equal to a point lattice constant b of Pd, is equal to a point lattice constant c of Pd and is equal to 3.900nm. The use of the precious metal-doped ZnO nanoscale particles comprises that the precious metal-doped ZnO nanoscale particles are utilized as a photocatalyst for unsymmetrical dimethylhydrazine wastewater degradation. Compared with the prior art, the precious metal-doped ZnO nanoscale particles have good morphology and a high degree of crystallization; a preparation method of the precious metal-doped ZnO nanoscale particles is simple and has good repeatability; a result of a test shows that the precious metal-doped ZnO nanoscale particles can be degraded faster and more thoroughly under sunlight; and the precious metal-doped ZnO nanoscale particles have a lower production cost, better energy-saving effects and a certain referential meaning for industrial application.

Vibrational energy is applied through a probe into a pre-scored brittle sheet, separating the sheet along the score line, such as flat or domed glass. Separation times are less than 1 second with smooth edge quality. The sheet may be in the form of a moving ribbon of sheet glass to which a vibrational load is applied in a direction transverse to the score line to promote crack propagation along the score line. The controller steers the probe according to the selected vibration frequency, amplitude, contact velocity, impact contact force, alignment with the scribe line, etc., depending on material properties and structures, and optimal process parameters.

The invention discloses a coal seam water injection system which comprises a pulse power subsystem and a water injection subsystem, wherein a water outlet of the water injection subsystem is communicated with a coal seam to be subjected to water injection of a set area so as to inject water into the coal seam to be subjected to water injection; and a liquid outlet of the pulse power subsystem is communicated with the coal seam to be subjected to water injection of the set area so as to provide hydraulic pulse to the coal seam to be subjected to water injection. According to the coal seam water injection system, the water injection of the coal seam with poor air permeability can be effectively realized, and the coal seam water injection system has the advantages of simple water injection operation and good effect.

The invention relates to a real-time synchronization method of the dynamic performance test system of fuel cell vehicles, which is used for the clock synchronization and the data synchronization of communication networks of the dynamic performance test system of the fuel cell vehicles. The method comprises steps as follows: (1) the communication network of the dynamic performance test system of the fuel cell vehicle is established; (2) clocks of all the device nodes in the communication network are synchronized by using the NTP (Network Time Protocol) network synchronization method; and (3) the hardware and software of the communication network are configured separately, synchronous timing rules are made, and thus the data of the entire communication network are synchronized. Compared with the prior art, the invention has the characteristics of overall planning, a plurality of communication protocols, capacity of meeting load requirements, distributed network and the like.