Abstract: A fan device including high voltage power source, conductive blade, first electrode and a resistance device is provided. Connecting side of the conductive blade is connected to first electric contact of the high voltage power source, and the conductive blade further includes a vibration side, wherein the conductive blade is extended from the connecting side to the vibration side along a first direction. The first electrode electrically connected to the second electric contact of the high voltage power source. The first electrode is disposed on a side of the vibration side of the conductive blade, and located in the vibrating range of the vibration side. The resistance device is connected between the conductive blade and the second electric contact in series.

Abstract: A fan device including high voltage power source, conductive blade, first electrode and a resistance device is provided. Connecting side of the conductive blade is connected to first electric contact of the high voltage power source, and the conductive blade further includes a vibration side, wherein the conductive blade is extended from the connecting side to the vibration side along a first direction. The first electrode electrically connected to the second electric contact of the high voltage power source. The first electrode is disposed on a side of the vibration side of the conductive blade, and located in the vibrating range of the vibration side. The resistance device is connected between the conductive blade and the second electric contact in series.

Abstract: A server rack includes a frame, servers and slide rail structures. The frame has a bottom end and a top end opposite to each other. The servers are stacked between the bottom end and the top end. Each of the servers has an operation end and a heat-dissipation end opposite to each other. The slide rail structures connect the servers to the frame for allowing each of the servers to at least partially slide out of the frame towards the corresponding operation end. A distance by which each of the servers slides out of the frame is greater than or equal to a distance by which the adjacent server located closer to the bottom end slides out of the frame.