Financial University under the Government of Russian Federation, Moscow, Russian Federation, RU sheremet@rfbr.ru Paper is dedicated to the new approach to distributed industrial systems (IS) sustainability/ vulnerability assessment. This approach is based on the unitary multiset grammars (UMG) as a flexible and convenient tool designed specially for large systems analysis and optimization. UMG description of IS technological base as well as multiset representation of order completed by the IS, its resource base and impact on the IS are presented. Criterion for recognition of IS sustainability to the impact is formulated. UMG extension for natural disasters impacts (NDI) representation is introduced, and criterion for recognition of IS sustainability to the NDI is also presented. The solution of the reverse problem, concerning part of the order, which may be completed by the affected IS, is described. Implementation issues are considered.

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Представлены результаты исследования зависимостей тока и емкости от прямого смещения диодов Шоттки Au/n-GaN, а также спектров подзонного оптического поглощения и дефектной фотолюминесценции объемных кристаллов и тонких слоев n-GaN. Показано, что туннелирование с участием дефектов является доминирующим механизмом транспорта при прямых смещениях контактов Шоттки на n-GaN. Зависимости тока и емкости от прямого смещения отражают энергетический спектр дефектов в запрещенной зоне n-GaN: рост с энергией плотности глубоких состояний, ответственных за желтую фотолюминесценцию в GaN, и резкий экспоненциальный хвост состояний с урбаховской энергией EU=50 мэВ вблизи края зоны проводимости. Уменьшение частоты перескоков электронов вблизи интерфейса Au/n-GaN приводит к широкому распределению локальных времен диэлектрической релаксации и изменению распределения электрического поля в области пространственного заряда при прямых смещениях. DOI: 10.21883/FTP.2017.09.44888.8528

The chapter describes multiset-based approach to the assessment of resilience/ vulnerability of the distributed sociotechnological systems (DSTS) to natural hazards (NH). DSTS contain highly interconnected and intersected consuming and producing segments, and also resource base (RB), providing their existence and operation. NH impacts may destroy some local elements of these segments, as well as some parts of RB, thus initiating multiple chain effects, leading to negative consequences far away from the NH local strikes. To assess DSTS resilience to such impacts, multigrammatical representation of DSTS is used. A criterion of DSTS sustainability to NH, being generalization of similar criterion, known for industrial (producing) systems, is proposed. Application of this criterion to critical infrastructures is considered, as well as solution of the reverse problem, concerning subsystems of DSTS, which may stay functional after NH impact.