Abstract: A system performs matrix multiplication of a vector by a two-dimensional matrix by evaluating whether the vector includes zero values. Rows of the matrix are loaded into a first memory device from a second device. Rows corresponding to the indexes of the zero values are not loaded. A dot product of columns of the matrix and the input vector is performed and stored. The matrix may be stored in the second memory device such that only entries for non-zero entries are stored. The rows of the matrix may be reconstructed in the first memory device from these entries.

Abstract: An agricultural harvester (100) has a chassis (106) supported on a plurality of wheels (110) for travel over the ground; a harvesting implement (104) supported on the front of the chassis (106); an internal combustion engine (108) disposed on the chassis (106) behind the harvesting implement (104); a radiator (112) coupled to the internal combustion engine (108) to transfer heat from engine coolant to ambient air; a fan (109) disposed to draw a flow of cooling air through the radiator having a first flow rate; and a conduit (114) configured to conduct substantially the entire first flow rate of air to the radiator (112). The conduit defines a lower air-impermeable enclosure surrounding the inlet of the radiator fixed to an upper enclosure comprising a plurality of screen walls for passing substantially the entire flow of cooling air therethrough.