Josephson memory technology

Article Abstract:

Many very-high-speed Josephson superconductive memories have been developed for various system architectures. Josephson technology offers the fastest speed with extremely low power dissipation, with memory read/write times down to less than 0.5 nanoseconds demonstrated in 1K-bit and 4K-bit devices. The implementation of memory circuit architectures in Josephson technology addresses decoder, cell, cell array and sense circuit aspects. Dc-powered AND and flip-flop decoders and ac-powered AND and OR decoders are described. Memory cells may be implemented as a two-junction SQUID (superconducting quantum interference device), a two-junction SQUID with direct-coupled sense gate, a one-junction SQUID with magnetic coupling sense gate, or a one-junction SQUID with direct-coupled sense circuit. The construction of the other components is described.

Circuit design, Integrated circuit fabrication, Technology, Memory, Josephson junctions, Scientific Research, Josephson Junction, technical

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Expert systems in transmission planning

Article Abstract:

Transmission planning in electric power systems aims to create a network that is economical, reliable and environmentally sound. A combination of deterministic and probabilistic system performance studies, system insulation coordination, transmission line and tower design, system operation and economics are all needed in transmission planning. The interrelationships of these disciplines and the relative importance of each of these are also important. Expert systems have been used to create more intelligent uses of system performance analysis algorithms including load flow, optimal power flow, transient stability and contingency analysis algorithms. Transmission planning needs to further explore knowledge acquisition, representation and reasoning, and generic design and planning knowledge-based strategies.

Systems analysis, Expert systems, Knowledge-based systems, Electric power plants, Electrical engineering, System Design, Strategic Planning, Knowledge-Based System, Power Plants

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