4 results about "Nonlinear scattering" patented technology

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.