Settings of regulators were calculated using an evolutionary algorithm.

The object of controlling the speed is a slip-ring induction motor. mining operations has been presented in the publication. The operating problems and the influence of qualitative interference acting on the inputs of individual regulators to field-oriented system in the course of underground. The most commonly used in the contemporary mining industry is alternating current machines used for processing electrical energy into mechanical energy. Mining industry is one of the most important customers of electric motors. The author describes the above-mentioned treatment techniques and pumping machinery, and expands on the English character of the former Antwerp water supply company. E&A also supplied the heavy pumping machinery to AWW, consisting of two screw pumps, four rotative beam engines, a steam-driven Appold centrifugal pump, a triple expansion engine and all the plunger pumps. The process subsequently became widely used at other sites all over the world. These 'revolvers' were used for the Antwerp supply from 1885 until 1914. This application proved unsuccessful, so that Anderson developed his revolving purifier, the operation of which was also based on the action of iron on water. From 1881 to 1885, Bischof's spongy iron filter was used in combination with sand filters. Faced with problems with the quality of the raw water source, they had to work out specific treatment techniques. influence of E&A lasted until the expiration of the Antwerp concession in 1930. Investigation into the origin and establishment of the Antwerp Waterworks Company Limited (AWW), revealed that the engineering firm of Easton & Anderson (E&A), of London and Erith, which had purchased the concession for supplying water to the City of Antwerp, were able to interest water companies in London and southern England in investing in the new business. Operator training and familiarisation with the machines is also covered. Visiting an embroidery exhibition is the best way to buy, and also attending as many demonstrations as possible-some companies will bring machinery to the purchaser. Their machine specifications and special features are listed, including what is supplied and machine capabilities, and an indication of price range. Nine international manufacturers are included with a brief introductory paragraph on the company, its background, innovations and other information. Spider frame, tubular and rpm are difined. Factors to bear in mind include noise levels, availability of stands and needle numbers. Following general advice on purchasing second-hand embroidery machines, there is an extensive survey of new equipment.

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