Isoperimetric optimality criterion in the method of ellipses for continuous controllable second-order systems

A linear continuous time varying control system is considered. The problem of constructing an outer estimate of the reachability set is studied. The construction uses the method of ellipsoids and is based on a new local optimality criterion.     

Organization of the production of alumosilicate mortar at magnitogorsk iron and steel integrated works

The Ogneupor Joint Stock Company has organized the production of mortar based on chamotte powder fabricated from rejected chamotte articles and alumosilicate scrap. The composition of the mortar and the main process parameters were determined in a laboratory study and in the production of pilot batches. In 1997 the plant produced 2500 tons mortar of grades MSh39, MSh36, and MSh31 that meet the requirements of GOST 6137-80, which has fully satisfied the demand of the Magnitogorsk iron and steel integrated works and saved 1.5 million rubles.