This thesis introduces structures and main key technologies of high performance transient electromagnetic system of mine. Such system applies sectional transmitting coil with damping absorption circuit to shorten turn-off time, thus achieving linear falling edge of transmitter current; inspects the turn-off time and current falling edge to enrich essential data of primary field; uses programmab...

We study the problem of learning parity functions that depend on at most k variables (kparities) attribute-efficiently in the mistake-bound model. We design a simple, deterministic, polynomial-time algorithm for learning k-parities with mistake bound O(n1− 1 k ). This is the first polynomial-time algorithm to learn ω(1)-parities in the mistake-bound model with mistake bound o(n). Using the stan...

An efficient method to identify bitwise identical long-time redundant segments in audio signals is presented. It uses audio segmentation with simple time domain features to identify long term candidates for similar segments, and low level sample accurate metrics for the final matching. Applications in compression (lossy and lossless) of music signals (monophonic and multichannel) are discussed.