4results about How to "Achieve uniqueness" patented technology

The application provides a performance testing method and device for a platoon automatic driving vehicle, the method comprising: in response to receiving a search condition input by a user, determining a target scene matching the search condition based on a pre-constructed scene database, wherein the pre-constructed scene database stores at least a plurality of first-level scene tags and second-level scene tags, the first-level scene tags comprise a plurality of second-level scene tags, and the plurality of second-level scene tags are in a mutual exclusion relationship; running the platoon automatic driving vehicle in the target scene and obtaining performance data of the platoon automatic driving vehicle; and verifying an automatic driving strategy of the platoon automatic driving vehicle according to the performance data. Through the application, automatic label management is realized, and new and old data are uniformly managed. When the judgment standard of the scene database is updated, only the historical data needs to be refreshed according to the new clustering standard, the historical data can be effectively utilized, and the retrieval difficulty or loss of the historical data is avoided.

This invention discloses a multi-tenant end-to-end data security isolation and control system and method, belonging to the field of vehicle network data security. It aims to solve the problems of easy data crosstalk, discontinuous isolation, unreliable trust benchmarks, and difficulty in compliance traceability in multi-tenant scenarios. The system generates a tenant root identifier (TID) for vehicle enterprise tenants, which, together with the device sub-identifier (DID), forms a tenant identifier chain. This chain is synchronized with a trusted authentication center to establish a vehicle-cloud hardware-level trust root. When the vehicle terminal accesses the system, it completes two-way identity authentication and allocates a dedicated message queue telemetry transmission MQTT topic partition and access permissions according to the TID. The terminal collects time-series vehicle control data and generates encrypted data frames with intrinsic identifiers and checksums for uploading. The access gateway performs dual isolation verification before transparent transmission. Data is forwarded to an independent logical storage partition for isolated storage according to the TID. This invention achieves strong hardware-level isolation, real-time verification, and full traceability throughout the entire end-to-cloud chain, effectively preventing cross-tenant data leakage.

The utility model relates to fan cover technical field discloses wedge fan cover, connect assembly, the bottom fixed mounting of connect assembly has the guide component, the outside fixed mounting of first sliding block has the cover body, the connection cylinder is located the inside of cover body, the sealing ring is combined with cover body. The beneficial effect of adopting the above technical scheme is: when needing to assemble the device, first, the cover body is installed through the sliding connection of first sliding block and first sliding slot, the cover body is quickly installed to the left side of guide component, and since the length value of first sliding block and the length value of first sliding slot are adapted, the effect of just installing in place is realized, at this time, the connection cylinder is passed from the inside of cover body, the connection cylinder is communicated with cover body and guide component, the effect of quick installation is achieved, and since the cover body and guide component have the effect of dismounting, the effect of convenient transportation is achieved.

The invention relates to a one-way secure content distribution and tamper-proof display method and system, and belongs to the field of information security. The method comprises the steps that terminal identity authentication is carried out, an identity label is generated for each terminal, and the identity label comprises a device fingerprint, a root key, a public key, a private key and a digital certificate; by establishing a one-way content pulling mechanism, one-way content pulling between a terminal and a platform is realized; the platform prepares to issue content and performs content integrity protection to obtain root hash, a ciphertext and a digital signature; the platform packs and issues the ciphertext, the root hash, the digital signature and the necessary Merkle hash tree branches to the terminal, and the terminal performs verification and decryption; a closed display environment is created on the terminal, and tamper-proof display is achieved. According to the method, the security and tamper-proof capability of content distribution are systematically improved through fusion of multiple technologies such as hardware feature fingerprints, chaos random pulling, dynamic environment key binding, closed display environment and the like.