Ecological Systems and Devices Annotation << Back Not determined gas-analytical problems and system-algorithmic methods of their decision Popov A.A., Nazarov E.S. Antiterrorist problems, and also problems of anticipation and parrying of technogenic failures on tunnel constructions concern to not determined problems. This statement is correct for those objects where the substance forming the amazing factor is not known, its quantity and technology of occurrence extreme situation. At uncertainty of substance forming amazing factor it is information-gauges base of such systems should be it is constructed on the basis of not selective gauges. As there is a necessity of algorithmic exception of an opportunity of reception of false signals «Alarm». It is necessary to try to reduce a degree of uncertainty of a problem at the first development cycles. E-mail: hazar21@mail.ru