FILTER 4DAn adjoint-free four-dimensional variational data

filter 4dAllows to query the data in a dataclass or method (e.g., $filter=firstName!='' AND salary>30000) This parameter allows you to define the filter for your dataclass or method. A filter is composedFiltering 3D printer emissions has two areas of focus, ultrafine particles and VOCs. The ultrafine particles generated from both FDM and resin printers