基于CSGWO-SVMD-SVD方法的离轴集成空洞输出频谱信号去除的研究
Optics express
|November 22, 2024
概括
一种新方法通过减少噪音来提高离轴集成腔输出光谱 (OA-ICOS) 中的气体测量精度. 这种新的方法显著改善了信号噪声比和数据稳定性,用于精确的光谱分析.
科学领域:
- 频谱学是一种光谱学.
- 信号处理 信号处理
- 优化算法 优化算法
背景情况:
- 非轴集成腔输出光谱 (OA-ICOS) 易受噪声干扰,影响气体测量准确度.
- 有效的消噪对于OA-ICOS应用中可靠的光谱分析至关重要.
研究的目的:
- 为OA-ICOS气体测量引入一种新的无噪法.
- 通过减轻噪声干扰来提高光谱数据的准确性和稳定性.
主要方法:
- 灰狼优化 (GWO) 和Cuckoo Search (CS) 的协同集成,以优化顺序变化模式分解 (SVMD) 参数.
- 单数值分解 (SVD) 的应用,用于噪声信号区分和组件重建.
- 与传统的过算法进行比较分析,例如波形变换 (WT),VMD-波形变换否定 (VMD-WTD) 和Savitzky-Golay (S-G).
主要成果:
- 拟议的CSGWO-SVMD-SVD算法显著改善了实验吸收频谱信号的信号噪声比 (SNR),从21.4提高到39.95.
- 相对应系数从0.99715增加到0.99946,表明信号保真度提高.
- 与WT,VMD-WTD和S-G算法相比,已经证明了优越的噪音识别和抑制能力.
结论:
- 新的无声化方法有效地抑制了OA-ICOS光谱数据中的噪声.
- CSGWO-SVMD-SVD算法大大提高了气体测量的准确性和稳定性.
- 这种方法为提高OA-ICOS在苛刻环境中的性能提供了一个有希望的解决方案.
相关概念视频
IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations
915
Identical bonds within a polyatomic group can stretch symmetrically (in-phase) or asymmetrically (out-of-phase). Similar to hydrogen bonding, these vibrations also influence the shape of the IR peak. Generally, asymmetric stretching frequencies are higher than symmetric stretching frequencies. For example, primary amines exhibit two distinct IR peaks between 3300–3500 cm−1 corresponding to the symmetric and asymmetric N-H stretching, while secondary amines exhibit a single...
915
Deconvolution
132
Deconvolution, also known as inverse filtering, is the process of extracting the impulse response from known input and output signals. This technique is vital in scenarios where the system's characteristics are unknown, and they must be inferred from the observable signals.
Deconvolution involves several mathematical techniques to derive the impulse response. One common approach is polynomial division. In this method, the input and output sequences are treated as coefficients of...
Deconvolution involves several mathematical techniques to derive the impulse response. One common approach is polynomial division. In this method, the input and output sequences are treated as coefficients of...
132
Standing Waves in a Cavity
869
A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
869
Difference from Background: Limit of Detection
5.9K
The limit of detection (LOD) is the smallest amount of analyte that can be distinguished from the background noise. The LOD value corresponds to the concentration at which the analyte signal is three times larger than the standard deviation of the blank signal. Below this value, the analyte signal cannot be differentiated from the background noise. It is calculated by dividing the calibration slope by 3 times the standard deviation of the blank signals.
The LOD indicates the presence or absence...
The LOD indicates the presence or absence...
5.9K
Reconstruction of Signal using Interpolation
173
Signal processing techniques are essential for accurately converting continuous signals to digital formats and vice versa. When a continuous signal is sampled with a period T, the resulting sampled signal exhibits replicas of the original spectrum in the frequency domain, spaced at intervals equal to the sampling frequency. To handle this sampled signal, a zero-order hold method can be applied, which creates a piecewise constant signal by retaining each sample's value until the next...
173
¹H NMR: Interpreting Distorted and Overlapping Signals
1.0K
Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
1.0K


