Abstract: Disclosed is a particle algorithm-based method for underwater detection and operation positioning of a reservoir dam system. A water body is stimulated by adopting a smoothed particle hydrodynamics (SPH) method, the ROV is simulated by adopting a discrete element method (DEM) unit formed by a series of particles, an umbilical cable between the ROV and a water surface control unit are simulated by a spring unit, dynamic interaction among the ROV, water flow and the cable are calculated by combining the SPH method and the DEM, and real-time motion positions of the ROV and the cable in complex environments are calculated and obtained; and a relative position between the ROV and the surface control unit can be calculated through the real-time position of the cable, and the real-time underwater positioning of the ROV is realized in combination with an absolute coordinate position of the surface control unit.

Abstract: The present invention provides a self-positioning system of a deepwater underwater robot of an irregular dam surface of a reservoir, including cross reflection metal plates arranged on the irregular dam surface, and an underwater robot provided with a control motherboard, a water level indicator and a sonar system, wherein the water level indicator and the sonar system are respectively connected with the control motherboard, and the control motherboard is connected with a computer via a cable. The cross reflection metal plate has known coordinates and has four quadrants. A sonar signal emitted by the sonar system is reflected by the cross reflection metal plate to generate sonar reflection signals of four quadrants, and the sonar signals in the effective quadrants correspond to known coordinate parameters of the cross reflection metal plate so as to obtain the horizontal distance between the underwater robot and the irregular dam surface.

Abstract: The present invention provides a self-positioning system of a deepwater underwater robot of an irregular dam surface of a reservoir, including cross reflection metal plates arranged on the irregular dam surface, and an underwater robot provided with a control motherboard, a water level indicator and a sonar system, wherein the water level indicator and the sonar system are respectively connected with the control motherboard, and the control motherboard is connected with a computer via a cable. The cross reflection metal plate has known coordinates and has four quadrants. A sonar signal emitted by the sonar system is reflected by the cross reflection metal plate to generate sonar reflection signals of four quadrants, and the sonar signals in the effective quadrants correspond to known coordinate parameters of the cross reflection metal plate so as to obtain the horizontal distance between the underwater robot and the irregular dam surface.

Abstract: This invention relates to a method of automatic recognition for limited speech and its correlative system and device. The main technical content is: Establish the relationship between the voice file and the identification information for a limited range of speech, and then insert the identification information into the voice file, or replace the content of the voice file with the identification information. After the transmitter sends the modified voice file, the receiver receives the modified voice and distinguishes the identification information in the voice. It then extracts the corresponding speech in the predetermined relationship using this identification information. The benefits of the embodiment of this invention include: a lower-cost method for automatically recognizing limited speech; high efficiency speech recognition, no need to wait for the voice file to finish to complete speech recognition; and lastly, a high recognition hit-rate or accuracy rate.

Abstract: An embodiment of the present invention discloses a method for distributing a service according to a terminal type, wherein a correspondence relation table for storing correspondence relations between a terminal type and an IP address of a network administration server, and an IP address of a service server is preset in a DHCP (Dynamic Host Configuration Protocol) server, and the method comprises the steps of: a terminal initiating, a DHCP access request to a network with terminal type information included in the access request; the DHCP server issuing an assigned IP address to the terminal, and querying for and issuing an IP address of a network administration server and an IP address of a service server corresponding to the terminal type information; the terminal registering with the network administration server according to the obtained IP address of the network administration server, and obtaining an access to the network; the terminal initiating a service request to the service server according to the ob

Abstract: This invention relates to a method of automatic recognition for limited speech and its correlative system and device. The main technical content is: Establish the relationship between the voice file and the identification information for a limited range of speech, and then insert the identification information into the voice file, or replace the content of the voice file with the identification information. After the transmitter sends the modified voice file, the receiver receives the modified voice and distinguishes the identification information in the voice. It then extracts the corresponding speech in the predetermined relationship using this identification information. The benefits of the embodiment of this invention include: a lower-cost method for automatically recognizing limited speech; high efficiency speech recognition, no need to wait for the voice file to finish to complete speech recognition; and lastly, a high recognition hit-rate or accuracy rate.