Abstract: The present invention discloses a rare earth permanent magnet material and a preparation method thereof. The method includes a sintering treatment step performed by laying a composite powder for diffusion on the surface of a neodymium iron boron magnetic powder layer and carrying out spark plasma sintering treatment to obtain a neodymium iron boron magnet with a diffusion layer solidified on the surface thereof, and diffusion heat treatment and tempering steps. The method of the present invention has high efficiency, good diffusion effects, and reduced quantities of heavy rare earth elements.

Abstract: A monitoring system based on a digital converter station includes a first monitoring terminal deployed at a first-level monitoring side, a second monitoring terminal deployed at a second-level monitoring side, and a third monitoring terminal deployed at a third-level monitoring side; the monitoring terminal at each level includes a communication module, a human-machine interaction module, a device status monitoring module, a device alarm management module, a video fusion processing module, and a data transmission adjustment and control module.

Abstract: A method for identifying biologically significant peptide-DNA binding interactions and sequence-specific DNA-binding peptides in vivo using combinatorial oligonucleotide libraries is disclosed. Target DNA sequences include promoter sequences, 5' and 3' regulatory sequences, and exon and intron regulatory sequences. Preferably, a yeast combinatorial library is employed. Peptides that bind to specific DNA sequences, identified by the above method, are disclosed. Also disclosed is a method for identifying nontoxic compounds that inhibit gene expression in host cells in vivo.