Abstract: A blockchain / distributed ledger based approach for traversing distributed ledger data structures for generating cryptographically verifiable presentation data objects is proposed herein. The approach can be utilized as a mechanism for using a combination of cryptographically generated verifiable credential data objects with cryptographically generated verifiable presentation data objects, verifying characteristics of a user or a computational process, such as whether a user is a graduate of a particular educational institution, whether the user has a transaction history that warrants a score greater than a threshold, or whether the user has sufficient access credentials to access a controlled resource. Zero knowledge proofs are proposed as a mechanism for generating verifiable proofs to protect sensitive verifiable credential data objects. The score can be generated using a black box machine learning model.

Abstract: A method and an apparatus for detecting a parking place and a direction angle of the parking place, a device, a vehicle, and a computer readable storage medium are provided. The method includes: obtaining a to-be-detected image; identifying corner points of a parking space in the to-be-detected image and cropping the to-be-detected image based on the corner points of the parking space to obtain a candidate parking space image; and performing detection by using a pre-trained parking space detection model based on the candidate parking space image to obtain a parking space detection result, where the parking space detection result indicates whether the candidate parking space image represents a real parking space, and in a case that the candidate parking space image represents the real parking space, the parking space detection result further includes a direction angle of the parking space.

Abstract: A bearing oil replenishing structure for fan includes a base of a fan and at least one oil reservoir member. The base includes a hollow shaft barrel upward extended from a central area thereof. The shaft barrel internally defines a bearing receiving hole for receiving a self-oiling bearing therein and is provided on its inner wall surface with at least one sidewall recess. The fan also includes an impeller having a shaft, which is pivotally fitted in the self-oiling bearing. The oil reservoir member is correspondingly fitted in the sidewall recess in the shaft barrel for absorbing extra lubricant oil thrown out of the self-oiling bearing due to a centrifugal force produced by the rotating shaft to therefore always store a proper amount of oil. The stored lubricant oil can be released to replenish the self-oiling bearing timely, enabling the latter to have extended service life.

Abstract: A method and an apparatus for detecting a parking place and a direction angle of the parking place, a device, a vehicle, and a computer readable storage medium are provided. The method includes: obtaining a to-be-detected image; identifying corner points of a parking space in the to-be-detected image and cropping the to-be-detected image based on the corner points of the parking space to obtain a candidate parking space image; and performing detection by using a pre-trained parking space detection model based on the candidate parking space image to obtain a parking space detection result, where the parking space detection result indicates whether the candidate parking space image represents a real parking space, and in a case that the candidate parking space image represents the real parking space, the parking space detection result further includes a direction angle of the parking space.

Abstract: The application discloses novel polymorphic crystalline forms of 2-[4-Bromo-3-(3-chloro-5-cyano-phenoxy)-2-fluoro-phenyl]-N-(2-chloro-4-propionylsulfamoyl-phenyl)-acetamide, sodium salt (Ib) with improved stability and physical properties which facilitate manufacturing, handling and formulating for treatment or prophylaxis of HIV mediated diseases, AIDS or ARC, in monotherapy or in combination therapy.

Abstract: The application discloses novel polymorphic crystalline forms of 2-[4-Bromo-3-(3-chloro-5-cyano-phenoxy)-2-fluoro-phenyl]-N-(2-chloro-4-propionylsulfamoyl-phenyl)-acetamide, sodium salt (Ib) with improved stability and physical properties which facilitate manufacturing, handling and formulating for treatment or prophylaxis of HIV mediated diseases, AIDS or ARC, in monotherapy or in combination therapy.