A video management method and system based on a topic, and a video search method based on a topic. In some embodiments, a multi-phase time-to-digital converter includes a first phase finder, a phase predictor, a second phase finder, and a phase switch. The system includes a connector for transmitting an antenna signal from an antenna of the motor vehicle to the mobile telephone, an electromagnetically shielded housing with an opening for inserting the mobile telephone into the housing and for removing the mobile telephone from the housing, and an elastically deformable retaining element that is designed to be electromagnetically absorbing. The plurality of volume image managers respond by performing requested operations and sending responses to the dataset image manager in parallel. The primary channel may be circular and the secondary channel may be annular, surrounding the primary channel. It is possible to make the solvent to a solid particle or liquid droplet by adjusting a gap between the nozzle and the workpiece to be cleaned; thus, it is possible to select the most preferable state according to the extent of the adhesion of organic material to the workpiece to be cleaned.