Abstract: A group head (20) for an espresso machine (10), the group head (20) comprising: a group head bracket (36) for detachable engagement with a portafilter (30) holding a puck (22) of ground coffee in a filter basket (64) to dispense an espresso coffee; a conduit (34) for receiving a flow of water to the portafilter (30); and, a heater (32) mounted in the group head (20) to heat the flow of water to the portafilter (30).

Abstract: A neural network including an embedding layer to receive a gate function vector and an embedding width and alter a shape of the gate function vector by the embedding width, a concatenator to receive a gate feature input vector and concatenate the gate feature input vector with the gate function vector altered by the embedding width, a convolution layer to receive a window size, stride, and output feature size and generate an output convolution vector with a shape based on a length of the gate function vector, the window size of the convolution layer, and the output feature size of the convolution layer, and a fully connected layer to reduce the gate output convolution vector to a final path delay output.

Abstract: A neural network including an embedding layer to receive a gate function vector and an embedding width and alter a shape of the gate function vector by the embedding width, a concatenator to receive a gate feature input vector and concatenate the gate feature input vector with the gate function vector altered by the embedding width, a convolution layer to receive a window size, stride, and output feature size and generate an output convolution vector with a shape based on a length of the gate function vector, the window size of the convolution layer, and the output feature size of the convolution layer, and a fully connected layer to reduce the gate output convolution vector to a final path delay output.