Abstract: Disclosed is a polarization fusion orientation method for an occluded environment, which comprises: acquiring a sky polarization image through a polarization camera first, then taking a heading angle output by an E-vector polarization orientation method as a state quantity, taking a heading angle output by a symmetry axis polarization orientation method as an observed quantity, realizing heading angle fusion through a multi-frequency variational Bayesian strong tracking cubature Kalman filter (MF-VBSTCKF), and respectively selecting different methods for a sampling position and a sampling interval period to update an optimal heading angle. The method solves the problem that high-precision and high-robustness heading angle measurement of polarized light cannot be realized in the occluded environment, can improve the precision and robustness of a polarized light orientation method in the occluded environment, and ensures high-frequency output of the heading angle at the same time.

Abstract: An optical inspection system includes one or more gratings to convert the polarization of light scattered from a target from an elliptical polarization that varies spatially across a collection pupil to a linear polarization that is uniformly oriented across the collection pupil. The one or more gratings have phase retardation that varies spatially across the collection pupil in accordance with the elliptical polarization. The one or more gratings include at least one grating on a reflective substrate. The optical inspection system also includes a linear polarizer to filter out the linearly polarized light.

Abstract: An optical inspection system includes one or more single-material gratings to convert the polarization of light scattered from a target from an elliptical polarization that varies spatially across a collection pupil to a linear polarization that is uniformly oriented across the collection pupil. The one or more single-material gratings have phase retardation that varies spatially across the collection pupil in accordance with the elliptical polarization. The optical inspection system also includes a linear polarizer to filter out the linearly polarized light.

Abstract: Disclosed is a marine communication buoy. The marine communication buoy includes s a round seat, side slots and hollow boxes, four side slots are uniformly distributed outside the round seat, and each side slot is connected with the hollow box in a sliding way. The marine communication buoy also includes sealing rings and buckle covers, an outer part of each hollow box is provided with a sealing ring, an outer end of each hollow box is slidably connected with the buckle cover, and an inner side of the buckle cover is in contact with the sealing ring. The marine communication buoy also includes valves and connector pipes, the connector pipe is arranged at an outer side of each buckle cover, and the connector pipe is provided with the valve.

Abstract: The present disclosure relates to a method and system for determining a final location associated with a service requester. The method includes obtaining, by at least one computer server of an online transportation service platform, an initial location associated with a service requester; comparing, by the at least one computer server, the initial location with a plurality of candidate locations in a database to generate at least one match result; and determining, by the at least one computer server, a final location based on the at least one match result, wherein the final location is associated with the initial location.

Abstract: The present disclosure relates to a method and system for determining a final location associated with a service requester. The method includes obtaining, by at least one computer server of an online transportation service platform, an initial location associated with a service requester; comparing, by the at least one computer server, the initial location with a plurality of candidate locations in a database to generate at least one match result; and determining, by the at least one computer server, a final location based on the at least one match result, wherein the final location is associated with the initial location.

Abstract: The present disclosure relates to a method and system for determining a final location associated with a service requester. The method includes obtaining, by at least one computer server of an online transportation service platform, an initial location associated with a service requester; comparing, by the at least one computer server, the initial location with a plurality of candidate locations in a database to generate at least one match result; and determining, by the at least one computer server, a final location based on the at least one match result, wherein the final location is associated with the initial location.

Abstract: The present disclosure relates to a method and system for determining a final location associated with a service requester. The method includes obtaining, by at least one computer server of an online transportation service platform, an initial location associated with a service requester; comparing, by the at least one computer server, the initial location with a plurality of candidate locations in a database to generate at least one match result; and determining, by the at least one computer server, a final location based on the at least one match result, wherein the final location is associated with the initial location.