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 ultra-supercritical (USC) tower-type solar heat absorber includes a grille-hot-plate current-sharing screen, a tube row, and a graphite filling layer. The grille-hot-plate current-sharing screen is assembled by a plurality of grille hot plates. Each of the plurality of grille hot plates includes a liquid-absorbing core and a grille, and is filled with a phase-transition working medium (such as sodium, potassium, and lithium) and pumped to a vacuum state.

Abstract: An ultra-supercritical (USC) tower-type solar heat absorber includes a grille-hot-plate current-sharing screen, a tube row, and a graphite filling layer. The grille-hot-plate current-sharing screen is assembled by a plurality of grille hot plates. Each of the plurality of grille hot plates includes a liquid-absorbing core and a grille, and is filled with a phase-transition working medium (such as sodium, potassium, and lithium) and pumped to a vacuum state.

Abstract: The present application provides a centrifugal compressor for a refrigeration system and a refrigeration system. The centrifugal compressor has a reverse braking function and comprises: a rotor shaft; a compressor impeller connected to the rotor shaft; a brake component on the rotor shaft, wherein a periphery of the brake component is made of magnetic conductive material; a plurality of sets of electromagnets fixedly arranged at radial outward of the brake component; a sensor device for sensing a rotational speed and direction of the rotor shaft; and a controller connected to the sensor device, wherein the controller receives signals from the sensor device and supplies power to the plurality of sets of electromagnets based on the signals. The centrifugal compressor and refrigeration system according to the various embodiments effectively suppress the reverse rotation of the compressor rotor shaft caused by the reverse airflow during unexpected shutdown.

Abstract: A magnetic suspension bearing device, a compressor and a method for adjusting catcher bearing gap. The magnetic suspension bearing device includes: a housing; a rotor in the housing; a magnetic bearing assembly between the housing and the rotor; a catcher bearing bracket mounted axially to an end of the housing, with a catcher bearing mounted at a radially inner side of the catcher bearing bracket; and a washer between the catcher bearing bracket and the end of the housing; wherein the washer includes a plurality of sub-washer portions, such that when the catcher bearing bracket is moved axially relative to the end of the housing to separate from the washer while still being supported by the end of the housing, the plurality of sub-washer portions can be radially removed and mounted.

Abstract: A winding method for radial magnetic bearing stator, a radial magnetic bearing stator and a radial magnetic bearing. The winding method for radial magnetic bearing stator includes: S110, sleeving a first formed stator winding on a first stator tooth of a stator core along a radial outward direction; S120, sleeving a second formed stator winding on a second stator tooth of the stator core along a radial outward direction; S130, a first coil of the first formed stator winding is connected in series with a second coil of the second formed stator winding; the first stator tooth is adjacent to the second stator tooth, and a stator slot is formed therebetween; and the coil number of the first formed stator winding is larger than that of the second formed stator winding.

Abstract: Systems, apparatuses and methods may provide for detecting a facial image including generating a spatial convolutional neural network score for one or more detected facial images from a facial image detector, generating a temporal convolutional network score for detected facial video frames from the facial image detector and generating a combined spatial-temporal score to determine whether a detected facial image gains user access to a protected resource.

Abstract: Systems, apparatuses and methods may provide for detecting a facial image including generating a spatial convolutional neural network score for one or more detected facial images from a facial image detector, generating a temporal convolutional network score for detected facial video frames from the facial image detector and generating a combined spatial-temporal score to determine whether a detected facial image gains user access to a protected resource.