42 results about "Arrival process" patented technology

A method for improving network performance using a virtual queue is disclosed. The method includes measuring characteristics of a packet arrival process at a network element, establishing a virtual queue for packets arriving at the network element, and modeling the packet arrival process based on the measured characteristics and a computed performance of the virtual queue.

The invention discloses a closed origin and arrival construction method of a shield machine, comprising the following steps: (1) using a tight continuous wall enclosure structure as a plain concrete continuous wall; (2) opening slanting periphery observation holes on a cavity door to observe the stable and leak conditions of soil bodies; (3) chiseling concrete and steel bars on the cavity door sectionally, and using plain concrete to replace the original continuous wall synchronously; (4) installing a receiving device of the shield machine, and applying pre-applied force; (5) filling materials in a steel sleeve barrel of the receiving device to a request height; (6) testing the pressure resistance of the steel sleeve barrel; (7) carrying out the digging construction of the shield machine until a shield tail of the shield machine enters or separates the cavity door; and (8) decompressing and disassembling the steel sleeve barrel of the receiving device. The closed origin and arrival construction method of the shield machine is safe, economical, efficient and simple, changes uncontrollable factors into controllable factors in a shield origin and arrival process, greatly reduces risks in a construction process, better controls land subsidence and provides the effectively ensured closed origin and arrival construction method of the shield machine.

The present invention relates to the field of communication technology, in particular to a double-threshold-based multi-user cooperative spectrum sensing method. The method for multi-user cooperative spectrum sensing based on double thresholds includes the steps of: the secondary user constructs a statistical judgment according to the received data samples and the parameters of the random arrival process of the primary user signal; Construct corresponding double thresholds; judge statistical judgment amount and low threshold size, and send different judgment results to the fusion center. The fusion center fuses the first judgment result, the second judgment result and the third judgment result by OR principle to obtain a final judgment result. The double-threshold method can not only solve the problem of random arrival and identification of primary user signals, but also saves data volume compared with soft-decision cooperation, and the result is more accurate than hard-decision cooperation, which greatly improves performance while ensuring accuracy.