Abstract: A cloud computing system includes a native client; and a platform system providing distributed resources and dynamic resource allocation, for receiving raw data uploaded by the native client and returning computed results, including: a data extracting module for receiving the raw data; an encrypting and decrypting module, wherein only a single user is permitted to simultaneously invoke the data extracting module and the encrypting and decrypting module and process the raw data; the encrypting and decrypting module generates a key during encrypting and returns the key to the user for keeping and the computed results to the native client after receiving the key inputted by the user; and a data computing module, for computing raw data encrypted by the encrypting and decrypting module and returning results to the encrypting and decrypting module, wherein the data computing module is shared by all users and can be invoked simultaneously by several users.

Abstract: A telescopic submarine includes: a front submarine unit (1), a rear submarine unit (2), and a lift tower (3). A ring-shaped piston (14) connected with the rear submarine unit (2) is in a hydrocylinder (7) connected with the front submarine unit (1). When the piston (14) is moved forward, a volume of the telescopic submarine is decreased, a specific gravity of the telescopic submarine is increased, and therefore the telescopic submarine dives into the water gradually. The telescopic submarine is able to surface via operating the horizontal rudder (20) to raise the telescopic submarine to a surface of the water, and then pumping the hydraulic oil (32) into the hydrocylinder (7) via the hydraulic pump (11) to drive the piston (14) to move backward. Therefore the volume of the telescopic submarine is increased, the specific gravity of the telescopic submarine is decreased, and the telescopic submarine surfaces.

Abstract: A trolley case including a case body and a weight monitoring device. The weight monitoring device is mounted on the case body, including a pressure sensor, a transmission unit, and a display module. The pressure sensor is mounted on the case body, and supports the case body when using. When being applied by a pressure, the pressure sensor transmits the pressure to a corresponding electrical signal according to an intension of the pressure. The intension of the electrical signal is corresponding to the intension of the pressure. The transmission unit is electrically connected to the pressure sensor, and transmits the electrical signal into a corresponding weight value. The display module is electrically connected to the transmission unit for display the weight value.