50results about How to "Judging validity" patented technology

A communication apparatus which appropriately controls beam patterns while performing access control based on physical carrier sensing. The communication apparatus, in conditions when signals cannot reach the other party without beam pattern forming, transmits a frame having a long preamble and enables access control based on physical carrier sensing. In conditions when signals can sufficiently reach the other party even without beam pattern forming, the communication apparatus transmits a frame having a shorter preamble and keeps the transmission overhead low. Further, the communication apparatus determines the beam pattern and the preamble type based on the transmission-reception history of access control following the CSMA / CA method.

The invention discloses a method for analyzing and controlling the effectiveness of the water curtain system of an underground water-sealed oil depot. The effectiveness of the water curtain system is judged by analyzing the similarity between water samples in different regions and the water supply water of the water curtain system, and the water supply quality of the water curtain is adjusted. A method for controlling the water curtain system. This method collects groundwater samples at different locations before, during and after the construction of the oil depot and analyzes the hydrochemical characteristics. Combined with the method of cluster analysis and principal component analysis, the hydrochemical characteristics of the water samples are classified, and the reservoir site area is obtained. The hydraulic relationship between the water supply of the water curtain system and the groundwater at different locations can accurately determine whether the water curtain system of the underground water-sealed oil depot can operate effectively, and adjust the water curtain system according to the analysis results by adjusting the water supply components of the water curtain. regulation. The invention proposes a method for analyzing and controlling the effectiveness of the water curtain system of the underground water-sealed oil depot based on the chemical characteristics of the groundwater.

The invention provides a method and system for achieving multiple-user communication through a point-to-point real-time media communication scheme. The system comprises a conversation server, an establishing module, a distributing and processing module, an establishment media source unit, an obtaining module and a connection processing module. By the adoption of the method and system for achieving multiple-user communication through the point-to-point real-time media communication scheme, a management ID and a local conversation ID are distributed to each user taking part in communication, multiple users communicate with one another through the management IDs, the local conversation IDs of a sending party and a receiving party are verified, conversation content goes on being transmitted after the effectiveness of the conversation content is judged, the connection success rate is improved, and then real-time media communication, not based on browser software, among the multiple users is achieved.

The invention provides a walker indoor positioning method based on Bayes estimation and map aided calibration; an inertial measurement unit is fixed on a body of a positioned person; after floors of a building are structurally expressed, a current position of the positioned person is calibrated on a map; the position of the positioned person is real-timely calculated, a room where the current position is located is calculated, and whether a through-wall event happens is determined; if the through-wall event happens, the through-wall event is judged to be caused by position deviation when the person goes out of home or caused by direction shift; and if the through-wall event is judged to be caused by the position deviation when the person goes out of home, the position is corrected to a position nearest a door, otherwise the position is corrected through particle wave filter. The walker indoor positioning method based on Bayes estimation and map aided calibration reduces error accumulation of the position and the direction, so that the indoor positioning accuracy based on an inertial sensor is higher, and the practicability is higher.

The invention relates to an intelligent transformer demagnetization recorder. The demagnetization recorder comprises a wireless communication module used for realizing a wireless communication connection between a transformer demagnetization recorder and a mobile intelligent terminal and transmitting information of the transformer demagnetization recorder to the mobile intelligent terminal, a central processing unit comprising a main control unit (MCU) and a memory and used for receiving and storing the information and coordinating other modules in a transformer demagnetization recorder body to work, a GPS positioning system electrically connected with the central processing unit, and a demagnetization function module electrically connected with the central processing unit and used for removing and verifying residual magnetism of a tested transformer and transmitting data information to the central processing unit. Compared with the prior art, the intelligent transformer demagnetization recorder has the advantages of GPS positioning, transformer residual magnetism removal and verification, test process visualization, data automatic acquisition management, information interaction with the mobile intelligent terminal and the like.