7 results about "Lateral drift" patented technology

An inflatable paddle board includes a board body which is inflatable and a central balancing fin which is configured to be provided at a bottom of the board body, the central balancing fin increases the surface area in contact with the water, so as to provide additional lateral resistance, and this added resistance stabilizes the paddle board, making it less prone to tip over, and also maintain a straight trajectory by reducing the lateral drift.

The application discloses a transverse drift stabilizer applied to a small towing system, which comprises a towing main body, a towing tail plate and streamlined stabilizers, the towing main body and the towing tail plate are connected through a shaft to form a basic towing system, and the towing main body is connected with the streamlined stabilizers on both sides respectively, and the towing tail plate can swing up and down during operation. The transverse drift stabilizer has simple structure and can self-adaptively maintain the stability of transverse movement in the marine environment with transverse disturbance.

The invention discloses an ozone column total amount calculation method based on sounding observation, and relates to the technical field of data analysis, by introducing a GPS three-dimensional path and air mass layer overlay analysis on the basis of traditional vertical section calculation, the situation that a sounding balloon passes through an air mass boundary or an ozone sudden change area due to transverse drift can be identified, and the overall ozone column total amount is calculated. And judging the section interfered by the transverse non-uniformity in the vertical section. By constructing a profile credibility weight mechanism, the suspected misjudgment section is flexibly corrected, the situation that transverse sudden change is misunderstood into vertical change is avoided, and the space consistency and the structure authenticity of column total amount calculation are improved. And meanwhile, a transverse interference section is extracted to generate an error sensitive mark for the remote sensing inversion model to use, so that the interference of a pseudo gradient structure on model training is remarkably reduced, and the problem of vertical misjudgment caused by balloon drift in a traditional method is solved.

The invention discloses a laminated structure of a three-dimensional memory and a preparation method of the laminated structure. The laminated structure comprises a substrate, a plurality of isolation layers, a plurality of metal layers, a groove and a storage layer, in the first direction, one isolation layer is stacked on the first side of the substrate, and the isolation layers and the metal layers are alternately stacked; the groove penetrates through the plurality of metal layers and the plurality of isolation layers along a first direction; the side wall of the groove is provided with an arc-shaped groove located in the metal layer; the concave direction of the arc-shaped groove is perpendicular to the first direction; the storage layer covers the surface of the arc-shaped groove. Therefore, in the laminated structure, the side wall of the groove is provided with the arc-shaped groove located in the metal layer, so that the contact interface of the metal layer and the storage layer can form arc-shaped transition, the distribution of an electric field on the side wall of the groove is optimized, the phenomenon of electric field concentration is reduced, and the probability of carrier lateral drift is reduced, thereby improving the accuracy of charge trapping and storage; and crosstalk between adjacent storage units is reduced. When the laminated structure is applied to the three-dimensional memory, the reliability of the three-dimensional memory can be improved.

The application discloses a kind of complex sea conditions near water surface trans-medium platform's anti-disturbance attitude control device and method, using the active fluid dynamic control of cross type tail rudder, can real-time generate reverse rectification torque, effectively offset near water surface sea wave, surge and shear flow to the lateral drift and attitude disturbance caused to platform, the device realizes the closed-loop correction of the floating trajectory, ensure that platform can converge to the predetermined area accurate water, effectively solve the problem of large drop point dispersion range under complex sea conditions, greatly improve the precision of operation deployment;Device is calculated by internal control unit, drive four rudder blades to carry out independent differential or linkage deflection, can complete fine adjustment to platform pitch angle, yaw angle and roll angle under water, which makes platform not need to change hardware configuration, can be independently selected according to actual operation instruction Vertical water, fixed angle water or near horizontal attitude water three modes, greatly expand the single platform's scientific research and engineering application scene.

This invention discloses a method and system for motion estimation of large ships based on multi-millimeter-wave radar. The method includes: deploying at least three millimeter-wave radars along the length of the ship on both port and starboard sides to acquire radar extrinsic parameters; simultaneously acquiring point cloud data and converting it to the ship's coordinate system; filtering out isolated noise points through point cloud consistency matching in overlapping areas to obtain a clean point cloud; solving for the local velocities of each radar based on a radial velocity measurement model and the RANSAC algorithm and converting it to the ship's coordinate system; combining a rigid body kinematics model to fit and solve for the lateral / longitudinal velocities and angular velocities of the ship's center of mass, calculating the lateral / longitudinal accelerations and bow-stern lateral drift velocities, and improving stability through filtering. This invention achieves all-weather, high-precision motion state perception with no cumulative errors through multi-radar data fusion and robust algorithms, providing reliable data support for intelligent operations such as autonomous navigation and collision avoidance for large ships.

An inflatable paddle board includes a board body which is inflatable and a central balancing fin which is configured to be provided at a bottom of the board body, the central balancing fin increases the surface area in contact with the water, so as to provide additional lateral resistance. This added resistance stabilizes the paddle board and makes it less prone to tip over. It also helps maintain a straight trajectory by reducing the lateral drift.