Time deviation

Abstract: PURPOSE:To generate a dial pulse satisfying the standards by storing a delay time into a nonvolatile memory through the use of a time deviation between a drive signal pulse and an output pulse in advance and generating a drive signal pulse whose time is corrected by the deviation in the dialing operation. CONSTITUTION:A nonvolatile memory 3 stores both a delay time T1 from the leading of a current pulse till a contact 'make' and a delay time T2 from the trailing of the current pulse till a contact 'break' which are actually measured at the test for a relay 1 integrated in a network controller. In the dialing operation, both the stored times T1, T2 are read from the nonvolatile memory 3 and an operation time deviation tau(=T1-T2) of the relay is calculated based on both the values and the dial pulse is corrected in response to the state of the deviation tau.

Abstract: The method involves determining a threshold value for a noise and a structure as a function of a standard deviation of a Gaussian curve, and measuring the noise and the structure in noise and structure regions. A standard noise deviation and a standard structure deviation are determined in the noise and the structure regions, and the standard noise deviation is compared with the standard structure deviation. A filtering control variable is set as a function of the comparison. An independent claim is also included for an imaging system for a medical diagnostics, comprising a recording unit.

Abstract: A wireless sensor network confidence weighted time synchronization method for steel structure flaw detection comprises the following steps: S1, selecting a node with a minimum ID number as a synchronous clock source by adopting a root node dynamic election mechanism, flooding and broadcasting a hierarchical message, and establishing a hierarchical network; S2, periodically broadcasting a synchronous message by the synchronous clock source, establishing a linear regression table by the child nodes after receiving the synchronous message, maintaining totally eight pairs of timestamps, performingparameter estimation to establish a confidence interval, and updating the linear regression table; S3, resolving the eight pairs of timestamp data, maintaining four pairs of clock drift rate data tables, and solving a weighting factor; and S4, fitting a linear regression curve by the sub-node by using the adjusted clock drift rate, compensating a local clock, thereby realizing single-hop synchronization, and so on, continuing to broadcast time synchronization data by the synchronized node, and compensating time deviation by the sub-node by taking the sub-node as a standard, thereby realizingwhole-network synchronization. The method is high in fault-tolerant capability, good in stability and high in synchronization precision.

Abstract: The present invention discloses a time deviation statistics collection method and apparatus. The method includes: sending an http query request to a Network Time Protocol NTP server, where the http query request is used to request to obtain a Coordinated Universal Time UTC time; obtaining the UTC time of the NTP server based on the http query; and performing time synchronization for a client to which the server belongs according to the obtained UTC time, where the client to which the server belongs includes: a Centos client and a Windows client. The present invention solves a technical problemthat defects exist in time deviation statistics collection in the related art.