4results about How to "Low detectability" patented technology

This invention discloses a method and system for simultaneous analysis of multiple lipid indicators in fingertip capillary blood, relating to the field of chemical analysis. The method includes S1: micro-sample pretreatment of fingertip blood; S1.5: sample matrix interference pretreatment; S2: multi-channel parallel specific reaction; S3: multi-band spectral synchronous detection; S4: machine learning intelligent calibration and analysis; and S5: result output and quality control verification. This method and system achieves simultaneous detection of five core lipid indicators in fingertip blood samples in a short time, with low deviation and cross-interference rates between the detection results and venous blood biochemical detection, and high matrix interference inhibition rate. It also possesses advantages of portability, speed, and accuracy, solving the problems of low detection efficiency, limited applicability, and matrix interference affecting accuracy in existing technologies.

The invention belongs to the technical field of aero-engine structural design, and relates to a deformable full-shielding spray pipe. The spray pipe mainly comprises a square section connected with a round outlet of the spray pipe through a round-to-square section, the square section comprises an upper outer cover, a lower outer cover and a side wall, and an adjusting plate is arranged between the upper outer cover and the lower outer cover and comprises a first adjusting piece, a second adjusting piece and a single-side expansion section. The first adjusting piece and the second adjusting piece are arranged in a rail groove of the arc-shaped throat plate in a sliding mode, the other end of the first adjusting piece is hinged to the round-to-square section, the other end of the second adjusting piece is hinged to the single-side expansion section, the other end of the single-side expansion section is connected to the tail end of the lower outer cover, and the arc-shaped throat plate is installed in a rail located on the side wall through a side shaft. And the arc-shaped throat plate is driven by the actuating cylinder to move up and down so as to control the throat distance between the adjusting plate and the upper outer cover. By means of the deformable spray pipe structure, intelligent switching between high aerodynamic performance and low detectability is achieved.

This invention provides a method and system for detecting abnormal driver states based on multimodal information fusion. The method includes: Step 1, acquiring real-time facial video images of the driver using an in-vehicle camera; and simultaneously acquiring the driver's voice signal using an in-vehicle microphone; Step 2, detecting driver fatigue abnormal states based on the facial video images acquired in Step 1 to obtain a fatigue probability; Step 3, preprocessing the voice signal, extracting Mel-frequency cepstral coefficients as voice features, and using a time-aware bidirectional multi-scale network for voice emotion recognition to obtain an anger probability; Step 4, adaptively weighting and fusing the fatigue probability and the anger probability to calculate a fusion risk value. This invention achieves non-contact, highly robust driver abnormal state detection, with a lightweight model and fast detection speed, making it suitable for deployment on in-vehicle edge devices.

The invention relates to the field of chemical analysis, in particular to a method for detecting resorcinol and related substances thereof, a test solution is detected by adopting a high performance liquid chromatography detection method, and octadecylsilane chemically bonded silica gel is used as a stationary phase; the method comprises the following steps: taking a mobile phase A and a mobile phase B, taking a 0.05-0.2% ammonia water solution, regulating the pH value of the ammonia water solution to 5.5-7.5 by using acid, taking methanol as the mobile phase B, and effectively separating and quantitatively determining possible impurities in a resorcinol raw material medicine or a preparation containing the resorcinol raw material medicine under a specific elution procedure by continuously optimizing a gradient elution procedure. Therefore, the quality of the resorcinol raw material medicine or a preparation product containing the resorcinol raw material medicine is effectively controlled.