Abstract: An electric toothbrush replacement head device is provided, including a brush head portion, which is provided with a toothbrush handle and a toothbrush head. A rotating cover is disposed adjacent to an end of the brush head portion. A vibration assembly is disposed in the rotating cover, and includes a first fixed plate, a size of which corresponds to an inner diameter of the rotating cover. The first fixed plate is provided with a space-keeping slot therein, a square shaft thereof, and a connecting seat thereon. An end of the square shaft is connected to the brush head potion through the space-keeping slot. An opposite end of the square shaft is connected to the connecting seat. The device is designed with a simple structure, which is flexible for installation and disassembly, and more convenient for use, furthermore, improves transmission efficiency and possesses various functions.

Abstract: A dual-purpose electric toothbrush head is provided and includes a toothbrush handle and a toothbrush head. The toothbrush head includes toothbrush bristles, and a nozzle and a water trough are disposed in the toothbrush head. The nozzle is connected to the water trough, and the toothbrush handle has a water inlet chamber. A water inlet hole is provided between the water inlet chamber and the water trough. A tail plug is provided on a toothbrush head tail end. The dual-purpose electric toothbrush head can not only clean teeth, but also rinse diastema and oral cavity to ensure oral hygiene. The dual-purpose electric toothbrush has diverse functions, and is stable and convenient to use, safe and reliable.

Abstract: Technologies for performing non-intrusive fine-grained power monitoring of a datacenter are provided. Hardware component state information for servers in the datacenter is collected, along with aggregate power consumption measurements for the datacenter. The servers are grouped into multiple virtual homogenous server clusters (VHCs) based on characteristics of the servers. A power model is constructed comprising multiple power mapping functions associated with the multiple VHCs. Component state information of a particular server can then be analyzed, along with a corresponding aggregate power consumption measurement, using the constructed power model to determine an approximate power consumption of the particular server. The approximate power consumption of the server can then be displayed and/or provided to one or more power management applications.

Abstract: Technologies for performing non-intrusive fine-grained power monitoring of a datacenter are provided. Hardware component state information for servers in the datacenter is collected, along with aggregate power consumption measurements for the datacenter. The servers are grouped into multiple virtual homogenous server clusters (VHCs) based on characteristics of the servers. A power model is constructed comprising multiple power mapping functions associated with the multiple VHCs. Component state information of a particular server can then be analyzed, along with a corresponding aggregate power consumption measurement, using the constructed power model to determine an approximate power consumption of the particular server. The approximate power consumption of the server can then be displayed and/or provided to one or more power management applications.