A method of determining maintenance sections of a rail includes partitioning the rail into a plurality of sections based on railway topographical information and track defect information; identifying, from the plurality of sections, sections whose sectional speed limits are lower than a recommended running speed; and determining, from the identified sections, sections which need maintenance. More particularly, the present invention relates to a method of differentiating CD34+ precursor cells into myeloid- and or lymphoid-dendritic cells. The linear motion is converted to an essentially slow rotational motion with the help of a thread element functionally connected to an articulated shaft belonging to the position adjustment mechanism. For each particular stage, one or more of the processing modules are assigned to perform operations appurtenant to that particular stage and collectively decompress the compressed data. The solenoid valve comprises in addition a programmable electronic control device that is housed together with said solenoid in a removable way inside an openable watertight container that is tightly fastened to said valve body.