7results about How to "Improve filtering accuracy" patented technology

The invention relates to a port illumination system life evaluation and health index model training method, which specifically comprises the following steps: firstly, acquiring operation data such as brightness, temperature and voltage of an illumination system and salt mist concentration data in real time through multiple sensors, and constructing a time sequence data set with a real residual life label; mapping the operation data to a quantum space to construct a quantum state and Hamiltonian, and solving an optimal filtering path through annealing optimization to obtain filtering data; then mapping the filtering data into a Riemannian manifold, calculating a Chen-Simons integral value in combination with a Laplacian operator, external differential and the like, and generating a feature deconstruction operator; constructing a fractional order space-time convolution network to extract features, and constructing and optimizing a residual life prediction model in combination with salt mist concentration and Weber distribution shape parameters; and finally, inputting new preprocessed data to obtain a prediction result, and calculating a health index. According to the invention, the data quality and the characteristic representation capability are improved, and the residual life prediction precision of the port lighting system can be effectively improved.

This invention discloses a cavity electrically tunable preselection filter, relating to the field of wireless communication equipment. It includes a mounting cavity and a PCB board. The PCB board is fixed to the mounting cavity via connectors and houses an integrated circuit and a coil assembly. The mounting cavity contains four resonant cavities and two circuit-shielded resonant cavities. The four resonant cavities are arranged side-by-side along the length of the mounting cavity. The two circuit-shielded resonant cavities are arranged side-by-side along the width of the mounting cavity and located in the middle of the four resonant cavities, serving to shield the integrated circuit and provide resonance for the resonant cavities on either side. The coil assembly includes four coils for specific frequency bands. The four coils are electrically connected to the PCB board and located within the four resonant cavities. It features a compact structure, excellent filtering performance, and adaptability to complex electromagnetic environments.

The invention discloses a rectangular coaxial adapter with a filtering function, and relates to the technical field of coaxial adapters, the rectangular coaxial adapter comprises a shell, a conductor is slidably mounted in the shell, bushes are arranged at the two ends of the conductor, a via hole is formed in the side wall of each bush, a contact sleeve is arranged on one side of each via hole, and the contact sleeves are arranged in the via holes. Firstly, the conductor is installed in the shell, then the insulation sleeve is arranged on the output conductor rod and the input conductor rod in a sleeving mode, then the bush and the contact head sleeve are sequentially arranged on the outer sides of the output conductor rod and the input conductor rod in a sleeving mode, and at the moment, the bolt rod on the side wall of the bush is inserted into the bolt groove; limiting and supporting work of the conductor in the shell can be completed through cooperation of the bolt groove and the bolt rod, then equipment connection work can be conducted, the insulation sleeve can conduct limiting and supporting on the output conductor rod and the input conductor rod, it is guaranteed that the shell and the input conductor rod are located at the axis of the connecting hole, the structure is light and handy, dismounting and mounting are convenient, welding is not needed, and the cost is low. Installation and debugging are convenient.

This invention provides a signal correction method and system for a strain gauge earth pressure sensor under centrifugal conditions with hypergravity. The method acquires the original signal from the earth pressure sensor, piezoelectric vibration signals from the bottom of the basket and the top of the model box, and a strain gauge resultant force signal coplanar with the earth pressure sensor. The vibration signals are then subjected to FFT transformation and frequency domain difference to obtain the vibration frequency domain of the earth pressure sensor plane, and filtered. The actual hypergravity is decoupled by subtracting the bottom surface vibration signal from the strain gauge resultant force signal, and then converted back to the actual hypergravity at the sensor location. Pre-calibrated centrifugal acceleration-zero drift and centrifugal acceleration-sensitivity relationships are used for dual compensation, and the corrected pressure data is output. This invention systematically eliminates zero-point drift, sensitivity changes, and vibration interference caused by hypergravity, significantly improving measurement accuracy.

This invention provides a vegetation filtering method for dangerous rock slopes based on multi-dimensional features, comprising: Step 1, obtaining an initial three-dimensional model of the dangerous rock slope; Step 2, generating a reference surface based on the initial three-dimensional model; Step 3, initially filtering the vegetation of the dangerous rock slope; Step 4, further filtering the vegetation of the dangerous rock slope. This invention employs a layered filtering strategy of "initial filtering and secondary filtering" to filter vegetation on dangerous rock slopes, significantly improving filtering accuracy and effectively avoiding the problems of "over-stripping" and "under-stripping" in traditional methods.

This invention discloses a data quality control method for millimeter-wave cloud measuring instruments based on the XGBoost model, belonging to the field of millimeter-wave cloud measuring instrument data quality control technology. The method includes the following steps: S1, cloud measuring instrument data input; S2, multi-dimensional feature extraction: multi-dimensional feature extraction is performed on the data input in step S1 by calculating the time-domain coefficient of variation, extracting multivariate texture features, and considering echo energy distribution skewness; S3, preliminary quality control processing; S4, secondary verification based on power spectrum data; S5, outputting the filtered result. This invention extracts specific features for two types of interference echoes using multi-dimensional features—time-domain coefficient of variation, texture features, and energy distribution skewness—and utilizes the model to adaptively learn the interference patterns under different scenarios, achieving simultaneous identification and filtering of the two types of interference. Simultaneously, power spectrum recognition is introduced to further improve the filtering accuracy. This method eliminates the need for separate processing logic, simplifying the process while improving filtering accuracy and scenario adaptability.

This invention discloses a high-Q tuned filter, belonging to the field of tuned filter technology. The tuned filter includes two symmetrically arranged resonant cavities, each connected in parallel with an inductor. This invention reduces the current density of a single coil, suppresses high-frequency skin and proximity effects, significantly reduces the high-frequency loss resistance of the inductor, and significantly improves the Q value at the same operating frequency. It directly reduces in-band insertion loss and improves out-of-band rejection depth, resulting in a significant improvement in filtering accuracy and anti-interference capability.