9 results about "Unknown Source" patented technology

The invention discloses a radioactive source identification method based on attenuation model inversion, and belongs to the field of radioactive source spatial position and intensity information estimation. Detecting unknown source parameter posteriori estimation results at present; executing a decision-making method based on an attenuation model information distance by using the mobile robot, and inverting that the radioactive source position is located on an extension line of a measurement point when detecting that some of the measurement points pass by the mobile robot conform to the attenuation model; carrying out collinearity measurement point detection to realize collinearity constraint and positioning optimization, and confirming the collinearity through geometric inspection and statistical inspection; and completing the search of the radioactive source until the termination condition of the search task is met. The radioactive source positioning cost is low, the positioning efficiency is high, and the reliability is good.

Antenna structures can include an additively manufactured engineered fingerprint (AMEF). AMEF antenna features facilitate individual or type classification of an unknown source antenna. As described herein, physical features can be included in an additively manufactured antenna to facilitate source identification, such as without sacrificing antenna performance. In general, AMEF techniques can improve physical layer security, such as without dramatically increasing production cost or decreasing production throughput, as compared to other approaches.

The invention discloses a vision screening intelligent question and answer method based on mixed retrieval and a related device, and relates to the technical field of vision intelligent screening, the method comprises the following steps: preprocessing a vision screening related document, constructing a BM25 keyword index and FAISS vector index two-way structure, and forming a vision screening knowledge base; after user questions are received, parallel retrieval and weighted fusion are carried out through double-path indexes, and Top-K related documents are obtained; constructing Prompt based on the retrieval result, the user question and the dialogue history, calling a large language model to generate and output answers in a streaming mode, and marking the document source of each key conclusion; and finally, automatically generating an intelligent questioning suggestion and maintaining a dialogue history. According to the scheme, the problems of insufficient retrieval accuracy, unknown answer sources and poor interaction experience in the prior art are effectively solved, the retrieval accuracy and the answer credibility are remarkably improved, the response time is shortened, the inquiry interaction continuity is optimized, and an efficient and reliable vision screening knowledge query and decision support tool is provided for medical staff.

The invention discloses an unknown source number multi-target orientation estimation method and system based on SW test, and belongs to the technical field of array signal processing, and the method comprises the steps of signal receiving, SW detection denoising and DOA estimation. According to the method, noise is removed through SW detection, gross errors in the noise can be accurately recognized and removed, signals are closer to Gaussian distribution, high-quality data are provided for the follow-up process, and the robustness of the algorithm in a complex noise environment is enhanced. The SW detection denoising and the JADE algorithm are combined, after noise interference is removed, the JADE algorithm can be used for better separating signals, the signal source separation precision is improved, and a foundation is laid for DOA estimation.

Systems and methods for determining Green's function between known receiver positions based upon seismic data from an unknown source, the unknown source having unknown source positions and unknown source characteristics. The systems and methods include estimating an up-going component and a down-going component of the seismic data at receivers of the seismic data by combining particle motion characteristics of the seismic data, assigning geometry to the unknown source by computing a point spread function (PSF) based on a conjugate transpose of the down-going component at the receivers and the down-going component at the receivers, and computing a cross-correlation function (CF) based on the conjugate transpose of the down-going component and the up-going component at the receivers, interpolating the PSF and the CF across the receivers, estimating a Green's function based on the interpolated CF and the interpolated PSF, and taking an action based on the Green's function.

The invention provides an interaction method, device, system and equipment, a storage medium and a program product. The method comprises the steps that long-term memory and short-term memory corresponding to a user and event memory corresponding to current input are determined from a memory bank; determining a current reply corresponding to the current input based on the current input, the event memory corresponding to the current input and the long-term memory and the short-term memory of the user; under the condition that the current reply has the memory in the reference memory library, the memory reference position comprises a memory identifier of the reference memory; a memory reference with a unique identifier is introduced into a reply, and an interactive traceability path is provided, so that the memory and reasoning process of the model is not a black box any more, the transparency and interpretability of a dialogue system are greatly improved, a user is allowed to verify an information source of model generation content, and the user experience is improved. The trust sense and the control sense of the user to the dialogue system are obviously enhanced, and the problems that the memory source is unknown and the user is difficult to understand and trust in the current model reply are solved.

This invention proposes a passive bi-station cooperative positioning method based on one-dimensional azimuth measurement. By constructing an orthogonal space for azimuth observation, a measurement equation can be established between one-dimensional measurement information, time delay information, and the unknown source position. Furthermore, by introducing weighted least squares technology, the near-closed solution can be quickly obtained to determine the target source position. Under Gaussian noise, when the measurement error is small and the deviation is negligible relative to the variance, the mean square error of the positioning can reach the theoretical estimation accuracy. The proposed invention can overcome the target positioning performance limitations caused by the drastic reduction in the number of operational radars due to electronic warfare, and has significant engineering application value.

Systems, apparatus, articles of manufacture, and methods are disclosed. An example apparatus includes interface circuitry, machine readable instructions, and programmable circuitry to at least one of instantiate or execute the machine readable instructions to: analyze detection data from an unknown source to identify a potential threat, add an entry to a security event cache that describes the potential threat, determine a number of entries in the security event cache that correspond to the unknown source, in response to a determination that the number of entries exceeds a threshold, add the unknown source to a threat list, and perform, in response to the addition of the unknown source to the threat list, a responsive action corresponding to the unknown source.

The invention relates to a method for locating an anomaly in a rotor blade (6) of a wind turbine (1), said method having the following steps: - detecting airborne noise using at least one airborne noise sensor (11, 21, 31) arranged within the rotor blade (6); - detecting structure-borne noise using at least one structure-borne noise sensor (12, 22, 32) arranged in or on the rotor blade (6); - ascertaining times (tK, tL) at which an event during which airborne noise and structure-borne noise are emitted at an unknown source position in or on the rotor blade (6) is reflected in the detected airborne noise and in the detected structure-borne noise; - determining a time difference (Δt) between the times (tK, tL); and - ascertaining the source position on the basis of the time difference (Δt) and the positions of the airborne noise sensor (11, 21, 31) and the structure-borne noise sensor (12, 22, 32). The invention further relates to an assembly suitable for carrying out the method for locating an anomaly in a rotor blade (6) of a wind turbine (1).