Abstract: Embodiments of the present disclosure provide a method and an apparatus for data movement among distributed data centers in a peer network. The method comprises: reducing an amount of data to be moved by pre-processing the data; generating a torrent file for the data; distributing the torrent file to a peer data center, and in response to receiving a data request from the peer data center, transmitting a segment of the data to the peer data center. Compared with the prior art, the embodiments of the present disclosure can realize reliable and fast data movement among distributed data centers over an unreliable and low-bandwidth network, can support an adaptive network topology among distributed data centers without complex pre-configuration or cumbersome runtime coordination, can support different types of data storage, and facilitates coordinated cloud computing and data aggregation among distributed data centers.

Abstract: An auxiliary device for a mechanical arm includes a supporting base, two reciprocating engines, a rotational plate, and four suction members. The reciprocating engine includes a cylinder and a driving rod. The cylinder is configured for driving the driving rod linearly and reciprocating along its longitudinal axis. The cylinder is rotatably fixed to the supporting base, thereby defining a first rotational axis therebetween. The driving rod is rotatably fixed to the rotational plate, thereby defining a second rotational axis therebetween. The rotational plate is also directly and rotatably fixed to the supporting base to be rotatable about a third rotational axis defined therebetween. The three rotational axes are parallel. The four suction members are fixed to the rotational plate.

Abstract: A data backup method is applicable to a cell phone with a data to be backed up stored therein. In the method, a timing instruction is first received to calculate a predetermined time period. Then, it is determined uninterruptedly whether the predetermined time period has elapsed. When the predetermined time period has elapsed, the data to be backed up is stored in a storage device.

Abstract: An auxiliary device for a mechanical arm includes a supporting base, two reciprocating engines, a rotational plate, and four suction members. The reciprocating engine includes a cylinder and a driving rod. The cylinder is configured for driving the driving rod linearly and reciprocating along its longitudinal axis. The cylinder is rotatably fixed to the supporting base, thereby defining a first rotational axis therebetween. The driving rod is rotatably fixed to the rotational plate, thereby defining a second rotational axis therebetween. The rotational plate is also directly and rotatably fixed to the supporting base to be rotatable about a third rotational axis defined therebetween. The three rotational axes are parallel. The four suction members are fixed to the rotational plate.