Abstract: Systems and methods for supporting both batch processing and streaming data applications, to load and process data incrementally, while providing a near-constantly materialized dataset based on raw blockchain data, are described. For example, the system may receive first on-chain data in a first format via a first input stream, wherein the first on-chain data originates from a blockchain node of a blockchain network. The system may transform the first on-chain data to a second format for storage in a second dataset, wherein the second format comprises an unbounded table.

Abstract: Systems and methods for a unified approach that is compatible with all blockchains, protocols, etc. The systems and methods use a bifurcated indexing system with a dynamically selected application service. The systems and methods bifurcate the indexing process into a storage layer and a compute layer.

Abstract: A four-notch flexible wearable ultra-wideband antenna fed by coplanar waveguide, includes a flexible base. A ground plane, a radiation patch and a feeder are arranged on the flexible base. There are several resonant tanks on the feeder and the radiation patch. The flexible base is made of insulating flexible material, and the feeder, the radiation patch and the ground plane are made of conductive flexible material. The four-notch flexible wearable ultra-wideband antenna fed by coplanar waveguide of the present application can be prepared by layer-by-layer assembly technology, spray printing or printed circuit board technology, and has the advantages of miniaturization and low profile, compact structure, convenient production, good conformality, wearable and other advantages.

Abstract: Systems and methods for creating a reorganization-immune blockchain index using mono-increasing sequence records are described. For example, the system may receive on-chain data for a plurality of blocks, wherein the plurality of blocks comprises a first block comprising a first event of a plurality of blockchain events within the on-chain data. The system may determine a first sequence number for the first event, wherein the first sequence number is based on a mono-increasing sequence record.

Abstract: A four-notch flexible wearable ultra-wideband antenna fed by coplanar waveguide, includes a flexible base. A ground plane, a radiation patch and a feeder are arranged on the flexible base. There are several resonant tanks on the feeder and the radiation patch. The flexible base is made of insulating flexible material, and the feeder, the radiation patch and the ground plane are made of conductive flexible material. The four-notch flexible wearable ultra-wideband antenna fed by coplanar waveguide of the present application can be prepared by layer-by-layer assembly technology, spray printing or printed circuit board technology, and has the advantages of miniaturization and low profile, compact structure, convenient production, good conformality, wearable and other advantages.

Abstract: A capacitive flexible tactile sensor based on graded inclined micro-cylindrical structure, includes an upper electrode layer, a lower electrode layer and a dielectric layer between them. The dielectric layer is composed of an upper dielectric layer and a lower dielectric layer. The upper dielectric layer includes an upper dielectric layer base, upper dielectric layer long micro-cylinders and upper dielectric layer short micro-cylinders. The lower dielectric layer includes lower dielectric layer base, lower dielectric layer long micro-cylinder and lower dielectric layer short micro-cylinder. The upper dielectric layer long micro-cylinders and the lower dielectric layer long micro-cylinders are closely bonded, and there is a distance between the upper dielectric layer short micro-cylinder and the lower dielectric layer short micro-cylinder. The sensor structure of the present application is stable, overcomes the viscous effect.

Abstract: Systems and methods for detecting extrinsic parameter miscalibration for light detection and ranging (“LiDAR”) devices are disclosed. According to one embodiment, a LiDAR detection method includes scanning, by a LiDAR system comprising one or more LiDAR devices, a field-of-view during one or more time periods, wherein the LiDAR system moves along a non-linear path during at least a subset of the one or more time periods. Return signal data obtained during at least the subset is aggregated and fiducial markers represented by the aggregated return signal data are identified. Each of the identified fiducial markers are compared to a respective reference fiducial marker of a plurality of reference fiducial markers. Based on the comparison, miscalibration of an extrinsic parameter associated with a position and/or an orientation of at least one of the LiDAR devices is detected. An action is initiated to remediate the detected miscalibration of the extrinsic parameter.

Abstract: A high sensitivity flexible three-dimensional force tactile sensor includes a hemispherical contact, wherein the hemispherical contact includes a tray with a groove on the surface and a hemispherical protrusion arranged in the groove. A flexible inverted cone component connected to the lower surface of the hemispherical contact, wherein a plurality of flexible triangular excitation electrode is arranged on the side surface of the flexible inverted cone component. A flexible common electrode surrounding part of the flexible triangular excitation electrode, wherein a first cavity with an opening is opened inside the flexible common electrode, parts of the flexible triangular excitation electrode and the flexible inverted cone component are arranged in the first cavity of the flexible common electrode. The flexible triangular excitation electrode and the flexible inverted cone component have no contact with the inner wall of the first cavity of the flexible common electrode to form an air cavity.