MEASUREMENT OF NEAR-MEGAWATT MILLIMETER-WAVE BEAMS -- OVERSIZED TRANSMISSION LINES FOR GYROTRON-BASED TECHNOLOGICAL OVENS AND PLASMA-CHEMICAL REACTORS -- DEVELOPMENT OF LUMPED AND DISTRIBUTED MODELS FOR ACCURATE MEASUREMENTS OF Q-FACTORS OF QUASIOPTICAL RESONATORS -- THE MODE-MATCHING TECHNIQUE AND FAST NUMERICAL MODELS OF ARBITRARY COORDINATE WAVEGUIDE OBJECTS -- ELECTRIC FIELD INTEGRAL EQUATI…