11 results about "Nonlinear scattering" patented technology

The application discloses a mineral spectral feature unmixing device using a generative adversarial network, comprising a multi-modal data preprocessing module for correcting and enhancing original mineral spectral data, solving small sample training problems, and providing high-quality input for subsequent unmixing, a generation network module for fusing noise and geological text description, a dynamic adversarial training module for initializing endmember features based on comparative learning of mineral paragenetic sequences, improving prior knowledge of the model on mineral combination rules, and an endmember reconstruction verification module for cyclically reconstructing a single albedo matrix using a generator network unit and a discriminator network unit; the application effectively eliminates nonlinear scattering and atmospheric noise interference through a model conversion unit and a 3D convolution kernel, combines data synthesis capacity of a conditional generative adversarial network, alleviates a small sample training bottleneck, and strengthens prior constraints of endmember feature combination rules based on comparative learning of mineral paragenetic sequences through a dynamic adversarial training mechanism.

The invention belongs to the technical field of echo generation, and particularly relates to a baseband echo rapid generation method based on frequency domain target scattering characteristics. According to the scheme, after radio frequency target scattering characteristics are down-converted to a base band, frequency domain processing is carried out on the frequency spectrum of a transmitted signal and the target scattering characteristics in a base band domain, so that the sampling rate requirement is greatly reduced, the calculated amount is reduced, and meanwhile the simulation precision equivalent to that of traditional radio frequency echoes is kept. Compared with a traditional time-domain echo generation method, the non-linear scattering behavior of the target in any attitude can be accurately simulated by introducing the target radio frequency domain scattering characteristics obtained based on an electromagnetic simulation tool, so that the authenticity of echo signals is remarkably improved. Meanwhile, compared with high calculation overhead of radio frequency domain simulation under several GHz sampling, equivalent frequency domain calculation is completed under the baseband sampling rate, so that the echo generation speed is increased by dozens of times compared with the radio frequency domain simulation, and the generation speed of target echoes is increased.

This invention relates to the technical field of testing or analyzing materials by measuring their physicochemical properties, specifically to a real-time monitoring system for multiple parameters of environmental water quality based on spectral analysis. The system includes optical paths for acquiring ultraviolet-visible (UV-Vis) and Raman spectra. These two optical paths are coaxially coupled via a dichroic mirror and an optical fiber combiner and connected to the same water flow cell. A timing control module enables time-division multiplexing acquisition of the same spatial coordinates. An edge computing module receives the combined spectral data, performs nonlinear scattering correction based on the Beer-Lambert law, separates the baseline drift component representing suspended matter scattering and the transmission component representing absorption characteristics, and inputs the characteristic peak intensity of the Raman spectrum as a priori constraint into the partial least squares inversion model. By qualitatively identifying specific organic compounds through Raman characteristic peaks, the solution space boundary of the corresponding overlapping bands in the UV-Vis spectrum is locked, and the inversion results for chemical oxygen demand (COD), total organic carbon (TOC), and ammonia nitrogen are output.

The application relates to the field of nuclear fusion devices, and discloses an escape electron mitigation device of a nuclear fusion device, a mitigation method and the nuclear fusion device. The mitigation device comprises an escape electron diagnosis unit for detecting the existence of escape electrons in real time and monitoring the real-time kinetic energy distribution spectrum of an escape electron beam at a high frequency; an adaptive control unit for calculating a resonance frequency capable of causing strong scattering of an electron beam under a current energy state in real time according to the received real-time kinetic energy distribution spectrum of the escape electron beam and in combination with the background magnetic field and density of plasma; and a radio frequency wave injection unit electrically connected or communicatively connected with the adaptive control unit, the radio frequency wave injection unit being capable of dynamically selecting one of radio frequency waves of multiple frequency bands according to the resonance frequency calculated by the adaptive control unit and injecting the radio frequency wave into the plasma. The application can track the energy of escape electrons in real time, and adaptively switch the emission frequency band to rapidly and nonlinearly scatter and dissipate the escape electrons, thereby improving the dissipation efficiency.

The invention relates to the field of nuclear fusion devices, and discloses an escape electron relieving device and relieving method of a nuclear fusion device and the nuclear fusion device.The relieving device comprises an escape electron diagnosis unit used for detecting existence of escape electrons in real time and conducting high-frequency monitoring to obtain a real-time kinetic energy distribution spectrum of escape electron beams; the self-adaptive control unit is used for calculating the resonance frequency capable of triggering strong scattering of the electron beam in the current energy state in real time according to the received real-time kinetic energy distribution spectrum of the escape electron beam in combination with the background magnetic field and density of the plasma; and the radio frequency wave injection unit is in electric connection or communication connection with the self-adaptive control unit, and the radio frequency wave injection unit can dynamically select one of radio frequency waves of a plurality of frequency bands according to the resonant frequency calculated by the self-adaptive control unit and inject the radio frequency waves into the plasma. According to the invention, the energy of the escape electrons can be tracked in real time, and the emission frequency band is adaptively switched to realize rapid and nonlinear scattering dissipation of the escape electrons, so that the dissipation efficiency is improved.

This invention discloses a nonlinear optical scattering neural network method and system based on joint optimization of multi-level harmonic features. It constructs three parallel feature extraction paths—fundamental frequency linear scattering, second-harmonic nonlinear scattering, and third-harmonic nonlinear scattering—to acquire optical speckle features of different orders. These multi-order features are then jointly optimized and classified in the digital domain. This invention reveals for the first time a strong complementarity between fundamental frequency linear scattering features and second-harmonic nonlinear scattering features, achieving a synergistic enhancement effect through feature splicing and fusion and joint optimization strategies. Furthermore, comparative analysis reveals high information redundancy between second-harmonic and third-harmonic features, providing clear hardware optimization guidance for multi-channel detection design in practical optical systems. This method improves the performance of complex image classification tasks, offering advantages such as low training complexity, high computational efficiency, and controllable hardware costs, making it suitable for multi-class, small-sample applications.

This invention relates to the interdisciplinary field of cavity magnetomechanics and quantum optics, proposing a composite cavity magnetic system and its control method based on YIG sphere-silica sphere coupling. The composite cavity magnetic system includes a microwave cavity, YIG and silica spheres of the same diameter in direct physical contact, an optical fiber coupling device, a bias magnetic field generator, a strong control field generation module, and a weak detection field module, driven synergistically by the strong control field and the weak microwave detection field. The physical contact between the YIG and silica spheres achieves direct coupling of phonon modes, constructing a composite multimode coupling system of microwave cavity photon mode—magnon mode—YIG sphere phonon mode—silica sphere phonon mode—optical whispering gallery mode. This invention utilizes the synergistic effect of magnetostrictive nonlinearity and photomechanical nonlinearity to form two independent coherent nonlinear scattering paths, resulting in more thorough destructive interference of multipath signals and significantly improving the induced transparent absorption effect.

The application relates to the field of nonlinear optics and discloses a nonlinear transmission matrix measuring device and method, which comprise a first laser, a first half-wave plate, a first convex lens, a second convex lens, a first reflector, a second laser, a second half-wave plate, a third convex lens, a fourth convex lens, a spatial light modulator, a second reflector, a first dichroic mirror, a second dichroic mirror, an objective lens, a second-order nonlinear scattering medium, a third reflector, a filter, a fifth convex lens and a CCD camera. The application generalizes the traditional transmission matrix method from linear optics to the field of nonlinear optics, realizes accurate solving and measuring of a transmission matrix between a fundamental frequency light field incident into a scattering medium and an emitted nonlinear scattering light field, and realizes arbitrary regulation and control of nonlinear harmonics through the nonlinear transmission matrix. Compared with a feedback algorithm, the nonlinear transmission matrix method can reduce time consumption and realize quick switching of different regulation and control requirements.

The application discloses a bolt state evaluation method and device based on convex post force transmission and passive spectrum widening, and belongs to the technical field of bolt state monitoring. The device is composed of an upper protective shell, an FPC flexible antenna layer and the like stacked together, and integrates a ladder-type circuit unit, a three-element coupling barrier enhanced E-PHEMT nonlinear scattering cavity and a force-electric cross-domain parameter mapping network, and a mechanically variable capacitor contains a cylindrical convex post. Based on the device, the pre-tightening force is transmitted through the convex post and converted into electric parameter change, a single-frequency electromagnetic wave excitation generates a spectrum widening response, and the bolt full life cycle evaluation is realized by combining static characterization, dynamic characterization and temperature compensation. Thus, the device does not need a battery and complex wiring, can withstand high pre-tightening force, has strong communication robustness in a metal environment, is accurate in monitoring, and effectively adapts to complex monitoring requirements in the fields of civil construction, industrial equipment and the like.

The invention discloses a CT image scattering correction method and system, an intelligent terminal and a storage medium, and relates to the technical field of radiation imaging, and the method comprises the steps: obtaining first photon intensity determined based on empty field scanning; performing CT scanning on the test die body to be subjected to scattering correction to obtain second photon intensity containing scattering photons after penetrating through the test die body; determining a scattering projection value according to the first photon intensity and the second photon intensity; determining projection deviation according to the second photon intensity and a pre-constructed nonlinear scattering correction model; determining a corrected projection value according to the scattering projection value and the projection deviation; and performing image reconstruction according to the correction projection value to obtain a target correction CT image corresponding to the test die body. Therefore, CT image scattering correction can be realized on the premise of ensuring the image quality.

The invention discloses a bolt state evaluation method and device based on boss force transmission and passive spectrum broadening, and belongs to the technical field of bolt state monitoring. The device is formed by stacking an upper protective shell, an FPC flexible antenna layer and the like and is integrated with a trapezoidal circuit unit, a ternary coupling barrier enhanced E-PHEMT nonlinear scattering cavity and a force-electricity cross-domain parametric mapping network, and a mechanical variable capacitor comprises a cylindrical boss. Based on the device, pre-tightening force is transmitted through the boss and converted into electrical parameter change, single-frequency electromagnetic wave excitation generates spectrum broadening response, and bolt full life cycle evaluation is achieved by combining static characterization, dynamic characterization and temperature compensation. Therefore, batteries and complex wiring are not needed, high pre-tightening force can be borne, communication robustness in a metal environment is high, monitoring is accurate, and complex monitoring requirements in the fields of civil construction, industrial equipment and the like are effectively met.