文法 P->S S->L S->S;L L->if0E1then2S3end L->if E then S else S end L->repeat S until E L->F:=E L->read F L->write E E->B E->BCB B->T B->BAT T->F T->TMF F->id F->(E) F->num A->+ A->- M->* M
Second-generation (2G) mobile communication systems have enabled voice traffic to go wireless. More important, however, have been the accompanying standardisation, compatibility and international transparency that were simply not available to teleco
We demonstrate the fabrication of the helical long-period grating (HLPG) in a two-mode fiber (TMF) with CO2 laser. The torsion characteristics of the helical gratings are experimentally investigated. It was found that the resonance wavelength of the
We demonstrate the fabrication of the helical long-period grating (HLPG) in a two-mode fiber (TMF) with CO2 laser. The torsion characteristics of the helical gratings are experimentally investigated. It was found that the resonance wavelength of the
