Abstract: The invention discloses an integrated broadband energy collecting and sensing device for a rod-cable structure, belonging to a piezoelectric vibration energy collecting and sensing field, which solves a problem that an existing piezoelectric energy harvester does not fully collect environmental multi-directional vibration energy. The device comprises an inner layer sleeve, an outer layer sleeve, a first piezoelectric thin film sensor, a self-powered module and a control communication module. The self-powered module comprises one or more vibrator groups. Each vibrator group comprises a plurality of piezoelectric vibrators arranged in sequence along a circumferential direction of the inner layer sleeve. The vibrator group collects vibration energy in any direction in a cross section of the sleeve. An inner surface of the outer layer sleeve is provided with a plurality of amplitude limiting blocks for protecting the piezoelectric vibrator during a severe vibration.

Abstract: The invention discloses an integrated broadband energy collecting and sensing device for a rod-cable structure, belonging to a piezoelectric vibration energy collecting and sensing field, which solves a problem that an existing piezoelectric energy harvester does not fully collect environmental multi-directional vibration energy. The device comprises an inner layer sleeve, an outer layer sleeve, a first piezoelectric thin film sensor, a self-powered module and a control communication module. The self-powered module comprises one or more vibrator groups. Each vibrator group comprises a plurality of piezoelectric vibrators arranged in sequence along a circumferential direction of the inner layer sleeve. The vibrator group collects vibration energy in any direction in a cross section of the sleeve. An inner surface of the outer layer sleeve is provided with a plurality of amplitude limiting blocks for protecting the piezoelectric vibrator during a severe vibration.

Abstract: Disclosed are a flexibly-driven small underwater robot and a driving method thereof. The underwater robot provided by the invention comprises a driving module and a propelling module. Two propelling modules are designed at head and tail portions, and the driving module is arranged between the two propelling modules. A rib plate in the driving module comprises a carbon fiber plate matrix and a piezoelectric fiber sheet; and a shape of the carbon fiber plate matrix is optimized by width change and hole digging. The propelling modules comprise a head propelling module and a tail propelling module, and the head propelling module and the tail propelling module are both propelled through a one-way valve. According to the invention, two modes of the pre-compression rib plate are adjusted through the piezoelectric fiber sheet, so that a volume of an internal cavity is changed, and jet propelling is carried out.

Abstract: Disclosed are a flexibly-driven small underwater robot and a driving method thereof. The underwater robot provided by the invention comprises a driving module and a propelling module. Two propelling modules are designed at head and tail portions, and the driving module is arranged between the two propelling modules. A rib plate in the driving module comprises a carbon fiber plate matrix and a piezoelectric fiber sheet; and a shape of the carbon fiber plate matrix is optimized by width change and hole digging. The propelling modules comprise a head propelling module and a tail propelling module, and the head propelling module and the tail propelling module are both propelled through a one-way valve. According to the invention, two modes of the pre-compression rib plate are adjusted through the piezoelectric fiber sheet, so that a volume of an internal cavity is changed, and jet propelling is carried out.

Abstract: A source end obtains to-be-transmitted data, divides the to-be-transmitted data into a plurality of segments, determines a sending sequence number of each segment, generates verification information of each segment based on the segment and the sending sequence number of the segment, and then sends the plurality of segments and corresponding verification information to a destination end. In this way, the destination end may verify a received segment based on a receiving sequence number and the verification information of each segment, to determine whether a transmission exception exists in the segment in a transmission process. Therefore, when verifying that a transmission exception occurs in the segment, the destination end may determine that a transmission exception exists in the to-be-transmitted data, without a need to wait until transmission of the entire to-be-transmitted data is completed, so that verification efficiency of the to-be-transmitted data is effectively improved.

Abstract: Aspects of the present disclosure involve systems and methods for passing optimization information, which may be used to optimize input/output (“I/O”) requests, from a database management system to a file system, using various protocols of a network file system. The optimization information provided by the database management system may relate to various aspects of an I/O request that may be optimized.

Abstract: Aspects of the present disclosure involve systems and methods for passing optimization information, which may be used to optimize input/output (“I/O”) requests, from a database management system to a file system, using various protocols of a network file system. The optimization information provided by the database management system may relate to various aspects of an I/O request that may be optimized.

Abstract: Aspects of the present disclosure involve systems and methods for passing optimization information, which may be used to optimize input/output (“I/O”) requests, from a database management system to a file system, using various protocols of a network file system. The optimization information provided by the database management system may relate to various aspects of an I/O request that may be optimized.