9results about How to "Eliminate time difference" patented technology

The invention relates to an electromagnetic navigation system, a data synchronization method and device thereof and electronic equipment, the electromagnetic navigation system comprises a field emitter and a magnetic sensor, the field emitter comprises a first emission unit and a second emission unit; the first transmitting unit is used for generating a working magnetic field which is used for positioning the magnetic sensor; the second transmitting unit is used for generating a reference signal, and the reference signal is used for synchronizing magnetic field detection data and magnetic field working data of the working magnetic field; wherein the magnetic field detection data is obtained by detecting a working magnetic field through a magnetic sensor, and the magnetic field working data is provided by a field emitter; the first emission unit and the second emission unit are configured to share a work clock of the field emitter. According to the application, the problem that the positioning error of the magnetic sensor is increased due to the fact that time difference exists between the time information of the magnetic field working data and the time information of the magnetic field detection data corresponding to the same physical moment in an existing electromagnetic navigation system is solved.

The present invention provides a vertical cement slurry spraying device and a paver with the device and applications thereof. The vertical cement slurry spraying device mainly includes a cement box. The pipeline in the cement box extends out of the box, circles around the paver and returns to the cement box. The pipeline consists of a pipe and a hose. The hose can be bent according to the spraying position, and the position of the hose on the paver can be adjusted to fit the paver. The vertical cement slurry spraying device can be installed on the paver to spray cement slurry on the roadbed while paving, avoiding cement slurry agglomeration and solidification caused by spraying first and then paving, eliminating the time difference between paving and spraying, and ensuring the adhesion of the base structure. The cement box is provided with a self-circulating pipeline, and a plurality of nozzles in different directions are installed on the self-circulating pipeline. The cement slurry is ejected from the nozzle to form a vortex, which continuously stirs the cement slurry to keep the cement slurry mixed evenly and not sticky and solidified.

The invention belongs to the technical field of synthesis of a positive electrode material of a sodium ion battery technology, and provides sodium vanadium phosphate prepared based on Joule heating as well as a preparation method and application of the sodium vanadium phosphate. The preparation method comprises the following steps: S1, uniformly mixing a vanadium source, a phosphorus source, a sodium source and a carbon source in a ball milling manner to obtain a precursor; and S2, loading the precursor in a graphite boat, and carrying out Joule heating treatment under inert gas or vacuum protection to obtain the uniform and compact carbon-coated sodium vanadium phosphate. The sodium vanadium phosphate is prepared through quick heating of Joule heat, the forming time difference of a carbon layer and a main body material can be effectively shortened, a uniform and compact carbon coating layer is obtained, and then the rate capability and the cycling stability of the sodium vanadium phosphate are improved.

The present application relates to the field of biological sample collection device, in particular to a biological sample collection information tracing device, comprising: a tube body for storing biological samples; a sealing tube cover detachably installed at the opening of the tube body; a trigger component arranged between the tube body and the sealing tube cover; a clock chip cooperating with the trigger component to determine the opening time of the sealing tube cover; a memory for storing the opening time detected by the trigger component; a near field communication module for transmitting the opening time stored in the memory to a reading device; a microcontroller for processing the state of the trigger component to determine whether the sealing tube cover is opened and transmitting the information of the opening time to the memory; a circuit board for connecting the trigger component, the clock chip, the memory, the near field communication module and the microcontroller. The present application realizes the digitization and objective tracing state of the biological sample as soon as it is collected from the outside.

This article relates to the field of information security and can be applied to the financial field. It provides a management method, device, equipment and storage medium for secure operation and maintenance, wherein the method, applied to the server, includes: receiving the authentication number of the operation and maintenance personnel; determining the basic authority corresponding to the authentication number according to the authentication number, department authority information table and personnel authority information table; generating a standard password according to the basic authority and / or authentication number, storing the standard password in the password library, and sending the standard password to the operation and maintenance personnel terminal; receiving the authentication password sent by the operation and maintenance personnel terminal, matching the authentication password with the standard password in the password library; if the passwords match successfully, opening the basic authority of the authentication number corresponding to the successfully matched standard password. This article can improve the security of operation and maintenance management.

The present application relates to navigation control technical field, especially to a kind of unmanned aerial vehicle navigation method and system based on vision and reinforcement learning, method includes: obtaining lagged first time visual image, real-time second time depth image and the continuous sensing data between them;Through the preset distillation vision network extraction global semantic features and with positive shadow image matching, the visual positioning anchor point of first time is solved;Inertial compensation positioning point of current time is obtained by using sensing data to calculate displacement and attitude change in time window, and mapping visual positioning anchor point to second time;Tensor splicing is carried out to inertial compensation positioning point and depth image to build reinforcement learning state space, and control instruction is generated by inputting strategy network;Through inertial compensation mechanism, the time-space deviation caused by visual calculation delay is eliminated, the flight trajectory oscillation problem caused by different step of multi-source heterogeneous data is solved, and the high robustness autonomous navigation and smooth control of unmanned aerial vehicle in dynamic environment are realized.

This utility model relates to a water-cooling mechanism for a coaxial coil, belonging to the field of metallurgical equipment cooling technology. The mechanism includes a coaxial conductive water-passing device, a melting coil, a circulating cooling system, and connecting components. The coaxial conductive water-passing device has a conductive core and internal cooling channels. The water inlet and outlet of the melting coil are located inside the device and are connected to the circulating cooling system through the inlet and outlet. This utility model achieves uniform flow of cooling water inside the coil by optimizing the cooling channel layout and structural connections, effectively improving heat dissipation efficiency. Its compact structure and easy installation and maintenance significantly reduce the coil's operating temperature, prevent localized overheating, and extend equipment lifespan, making it particularly suitable for coil cooling in medium-frequency induction heating equipment.

A SQL task link optimization method, device, equipment, storage medium and program product are disclosed, task related data of a SQL task is acquired, a dependency link between SQL tasks is filtered based on the task related data, wherein the dependency link is used to represent an association relationship between the SQL tasks, a directed graph network of the SQL tasks is constructed based on the filtered dependency link, the directed graph network is divided into at least two connected subgraphs, a SQL task in each connected subgraph is subjected to a merging feasibility test, a task merging decision is generated based on a test result, and a link of the SQL task is restructured and optimized according to the task merging decision. By adopting the embodiment of the present application, an execution exception of a SQL task can be captured in real time, system failure caused by problem accumulation can be avoided, and the management requirement of a high concurrency and large data volume SQL task link can be adapted.

The present invention discloses a brain-electromyography information synchronization system and method for accurately capturing movement intention, including a steady-state force acquisition module for acquiring the lower limbs of a subject to determine a target force output interval, a brain-electromyography acquisition module for synchronously acquiring the user's EEG signals and EMG signals and having a signal wireless transmission function, a signal preprocessing module for filtering artifacts of EEG signals and EMG signals to improve the signal-to-noise ratio of brain-electromyography signals, and a brain-electromyography information synchronization module for fitting brain-electromyography data using a multivariate model and performing brain-electromyography coherence analysis and brain-electromyography time delay quantification. The present invention uses a multivariate model to fit brain-electromyography data, and performs time delay quantification of brain-electromyography movement intention information based on brain-electromyography coherence analysis, thereby achieving movement intention information synchronization of brain-electromyography signals by removing delay, laying a solid theoretical foundation for brain-electromyography fusion, and improving the effectiveness of the method for identifying human movement intention by brain-electromyography fusion and the robustness of the intention recognition system.