Abstract. Atmospheric black carbon (BC) is the strongest solar radiative absorber in atmosphere, exerting significant influences on earth's radiation budget. The mass absorption cross section (MAC) a crucial parameter for converting light coefficient (σab) to equivalent BC concentration (EBC). Traditional filter-based instruments, such as AE33, use constant MAC of 7.77 m2/g at 880 nm derive EBC...

This paper investigates several cost-sparsity induced optimal input selection problems for structured systems. Given an autonomous system and a prescribed set of links, where each link has non-negative cost, the include selecting minimum cost links with smallest possible while bounding their cardinality to achieve structural controllability. Current studies show that in dedicated case (i.e., ca...

Two direct systems of Boundary-Domain Integral Equations, BDIEs, associated with a mixed boundary value problem for the stationary compressible Stokes system variable viscosity coefficient in an exterior domain $ \mathbb{R}^3 are derived. This is done by employing surface and volume potentials based on appropriate parametrix (Levi function) third Green identities velocity pressure. Mapping prop...

Requirements that should be met when determining the regimes of circuits with variable elements are formulated. The interpretation of the variations in the regimes, based on projective geometry, enables adequate expressions for determining and comparing the regimes to be derived. It is proposed to use as the parameters of a generalized equivalent generator of an active two-pole with changeable ...

Hysteresis motors are self starting brushless synchronous motors which are being used widely due to their interesting features. Accurate modeling of the motors is crucial to successful investigating the dynamic performance of them. The hysteresis loops of the material used in the rotor and their influences on the parameters of the equivalent circuit are necessary to be taken into considerat...