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Soft sensors are inferential estimators, drawing conclusions from process observations when hardware sensors are unavailable or unsuitable; they have an important auxiliary role in sensor validation when performance declines through senescence or fault accumulation. The non-linear behaviour exhibited by many industrial processes can be usefully modelled with the techniques of computational intelligence: neural networks; fuzzy systems and nonlinear partial least squares. Soft Sensors for Monitoring and Control of Industrial Processes underlines the real usefulness of each approach and the sensitivity of the individual steps in soft-sensor design to the choice of one or the other. Design paths are suggested and readers shown how to evaluate the effects of their choices. All the case studies reported, resulting from collaborations between the authors and a number of industrial partners, raised challenging soft-sensor-design problems. The applications of soft sensors presented in this volume are designed to cope with the whole range from measuring system backup and what-if analysis through real-time prediction for plant control to sensor diagnosis and validation. Some of the soft sensors developed here are implemented on-line at industrial plants. Features: • soft-sensor design; • advice on data selection and choice of model structure; • model validation; • strategies for the improvement of soft-sensor performance; • uses of soft sensors in fault detection and sensor validation; • soft sensors in use in industrial applications such as a debutanizer column and a sulfur recovery unit. This monograph guides interested readers – researchers, graduate students and industrial process technologists – through the design of their own soft sensors. It is self-contained with full references and appraisal of existing literature and data sets for some of the case studies can be downloaded from springer.com. Advances in Industrial Control aims to report and encourage the transfer of technology in control engineering. The rapid development of control technology has an impact on all areas of the control discipline. The series offers an opportunity for researchers to present an extended exposition of new work in all aspects of industrial control.

Detectors --- Manufacturing processes --- Process control --- Design and construction. --- Mathematical models. --- Control of industrial processes --- Industrial process control --- Automatic control --- Quality control --- Industrial engineering. --- Chemical engineering. --- Telecommunication. --- Artificial intelligence. --- Industrial and Production Engineering. --- Control and Systems Theory. --- Information Systems Applications (incl. Internet). --- Industrial Chemistry/Chemical Engineering. --- Communications Engineering, Networks. --- Artificial Intelligence. --- AI (Artificial intelligence) --- Artificial thinking --- Electronic brains --- Intellectronics --- Intelligence, Artificial --- Intelligent machines --- Machine intelligence --- Thinking, Artificial --- Bionics --- Cognitive science --- Digital computer simulation --- Electronic data processing --- Logic machines --- Machine theory --- Self-organizing systems --- Simulation methods --- Fifth generation computers --- Neural computers --- Electric communication --- Mass communication --- Telecom --- Telecommunication industry --- Telecommunications --- Communication --- Information theory --- Telecommuting --- Chemistry, Industrial --- Engineering, Chemical --- Industrial chemistry --- Engineering --- Chemistry, Technical --- Metallurgy --- Management engineering --- Simplification in industry --- Value analysis (Cost control) --- Production engineering. --- Control engineering. --- Application software. --- Electrical engineering. --- Electric engineering --- Application computer programs --- Application computer software --- Applications software --- Apps (Computer software) --- Computer software --- Control engineering --- Control equipment --- Control theory --- Engineering instruments --- Automation --- Programmable controllers --- Manufacturing engineering --- Process engineering --- Industrial engineering --- Mechanical engineering