8results about How to "Excellent reliability" patented technology

This invention discloses a power-free lifting table with smooth lifting, comprising a base and a tabletop. A hollow tube and a lead screw are fixedly connected to the base. A lifting sleeve is rotatably connected to the lower part of the tabletop. A locking mechanism is provided between the lifting sleeve and the tabletop, and a reset mechanism is provided between the hollow tube and the lifting sleeve. The reset mechanism includes a cable, a counterweight ring, a fixed pulley system, and a rotating seat. One end of the cable is connected to the counterweight ring, and the other end, after passing through the fixed pulley system and changing direction, is connected to the rotating seat. The reset mechanism, using a counterweight ring, fixed pulley system, and cable, replaces the traditional spring-assisted structure. The counterweight's weight is unaffected by the lifting stroke, providing a constant assist load throughout the entire process. After unlocking the locking mechanism, the counterweight ring can uniformly drive the lifting sleeve to rotate and rise. The operating force is uniform during descent adjustment, solving the defects of spring-assisted structures, such as high initial resistance and easy slippage at the end due to changes in elastic force with compression.

The invention discloses a method for quantitatively detecting cucumber green mottle mosaic virus (CGMMV) infectious viruses in watermelon seeds based on propionium bromide azide (PMA) pretreatment and reverse transcription quantitative polymerase chain reaction (RT-qPCR). The method comprises the following steps: S1, preparing a seed suspension containing virus particles; s2, grouping the suspensions, adding PMA with the final concentration of 150-170 [mu] M into a PMA treatment group, incubating for 20-40 min in a dark place, then carrying out blue light (460-490 nm) irradiation to enable PMA to selectively inhibit non-infectious virus nucleic acid amplification, and not adding PMA into a control group or carrying out inactivation treatment on the control group; s3, extracting nucleic acid, and carrying out RT-qPCR (real-time quantitative polymerase chain reaction) on the nucleic acid by adopting a specific primer pair CG-2439F / CG-2625R to obtain a Cq value or a nucleic acid amount; and S4, comparing the results of the PMA treatment group and the control group to determine the infectious CGMMV content or the live virus proportion. The method can reduce inactive virus interference, is suitable for seed quarantine, virus risk assessment and disinfection effect evaluation, and can provide a matched detection kit.

The invention discloses a cam, a damping device and a vehicle, and belongs to the technical field of vehicles. The cam is an equal-width cam, the base circle radius of the cam is Ra, the extending stroke of the cam is h, and Ra is larger than or equal to 0.4 * h; wherein the extending stroke is the movement limit of the cam.

The invention provides a writing method and a writing circuit based on an RRAM chip, and relates to the technical field of memory circuit design, the method comprises the following steps: when a writing instruction for a target RRAM chip is received, reading a formation state flag of the target RRAM chip; wherein if the formation state flag is not formed, the target RRAM chip does not execute one-time initialization operation; and when the formation state flag is not formed, executing an initialization operation on the target RRAM chip, and setting the target RRAM chip in the first logic state through the initialization operation to complete the write-in instruction. According to the method and the device, the optimal writing reliability and data stability can be provided for key application scenes, such as a solidified test program code, a storage equipment calibration parameter or a secure root key, which only need to write data at one time.

The utility model discloses a spliced LED display screen support structure relates to LED display support field, including with the display screen connecting frame of LED display screen connection and install on the wall body wall body connecting frame, the display screen connecting frame is provided with the assembly spare that is connected with wall body connecting frame, be equipped with two working ends among the assembly spare, wall body connecting frame is provided with the installation clamping groove that is adapted to assembly spare, the installation clamping groove has two, respectively symmetrical in the both sides of wall body connecting frame, and every installation clamping groove all with one working end in assembly spare corresponds, and every installation clamping groove can limit one working end in assembly spare in wall body connecting frame, and the application has effectively solved the problem that the traditional support adopts bolt fixation when disassembling difficult, has greatly promoted the convenience of maintenance.

The utility model provides a wide body truck steel plate spring assembly, including first steel plate spring, both ends of first steel plate spring are provided with the ear, the lower part of first steel plate spring is provided with at least one second steel plate spring, and the one end of second steel plate spring adjacent to first steel plate spring is provided with the ear, and the other end of second steel plate spring is provided with the extension plate, the utility model discloses at least one second steel plate spring is equipped in the lower part of first steel plate spring, and the U type ear of one end of adjacent second steel plate spring is wrapped end portion, and the extension plate is equipped at the other end and exceeds the end of first steel plate spring, the design expands the effective length of second steel plate spring, realizes the independent work of first steel plate spring when light load and keeps comfortable, and the second steel plate spring intervention enhances the stiffness when heavy load, and the dynamic regulation stiffness significantly improves the upper limit of bearing.

This invention relates to the field of parameter field cascade reconstruction technology, and discloses a method for cascade reconstruction of three-dimensional water vapor parameter fields based on sparse GNSS station network data. The method includes: 1. Collecting observation data from m GNSS stations sparsely distributed within a target area; 2. Obtaining the slant path water vapor content of all GNSS signals corresponding to each GNSS station; 3. Establishing a water vapor tomography equation set for each GNSS station, using a single GNSS station as the basic unit; 4. Obtaining the local three-dimensional water vapor parameter field of each GNSS station; 5. Dividing the entire target area into spatial units with the same spatial resolution as the local three-dimensional water vapor parameter field of each station, and calculating the spatial correlation coefficient between each spatial unit and the local three-dimensional water vapor parameter field of each station at each height level; 6. Constructing a recursive model to obtain the three-dimensional water vapor parameter field of the target area. This invention achieves high-precision reconstruction of the three-dimensional water vapor parameter field of the target area under sparse GNSS station network conditions, improving the inversion accuracy of three-dimensional water vapor parameter fields based on sparse GNSS station networks.

This invention provides an adaptive coding and modulation method for satellite communication based on link quality estimation, relating to the field of satellite communication. The method includes the following steps: Step S1: The transmitter generates and transmits a physical layer frame containing a pilot sequence; the receiver receives the physical layer frame and extracts the pilot sequence from it, estimating the mean and variance of the channel signal-to-noise ratio (SNR) based on the extracted and transmitted pilot sequences; Step S2: Based on the mean and variance of the channel SNR estimated in Step S1, the receiver queries a preset joint decision table to determine the coding and modulation scheme and pilot insertion frequency for the next frame, and feeds this information back to the transmitter to adjust the transmission strategy. This invention achieves optimal combined system throughput and reliability performance even when the channel state changes rapidly.