计量学报2025，Vol.46Issue(12)：1737-1745,9.DOI:10.3969/j.issn.1000-1158.2025.12.05
双碳源情形下场外采样逆推排速的碳监测法
Carbon Monitoring Method Based on Off-Site Sampling and Back-Calculation of Emission Rates under Dual Carbon Source Scenarios
摘要
Abstract
To address the challenges of dynamic diffusion monitoring and precise accounting for dual carbon emission sources in complex terrains,this study builds on single emission sources to develop a carbon molecular diffusion dynamics model grounded in three-dimensional Brownian motion.By orthogonally decomposing carbon molecular velocity vectors and integrating Maxwell velocity distribution with Boltzmann distribution laws,we systematically established a three-dimensional kinematic equation framework for carbon molecules at the microscopic scale.Introducing the"stopping time"criterion from stochastic process theory and terrain state functions(absorption,semi-absorption,and flotation states),the model achieves dual-phase dynamic characterization spanning from free-fall to stagnation states.The diffusion coefficients were optimized using a gradient descent algorithm,enabling the inversion of emission rates and calculation of relative errors against measured values,thereby validating the model's industrial-grade applicability.A technical framework of"model calibration-data inversion-dynamic correction"was proposed,which overcomes the limitations of traditional static accounting methods.This framework significantly enhances spatiotemporal resolution and incorporates terrain-state mechanisms into carbon fate analysis,strengthening the model's real-world interpretability.The relative errors of the two carbon source scenarios model inversion results are 6.9%and 1.2%,which are within the allowable error range,respectively,falling within acceptable error margins.This method can accurately invert dual-source emission rates.关键词
碳监测/双碳排放源/停时/排放速率反演/碳分子扩散模型/地形状态函数Key words
carbon monitoring/dual carbon emission sources/stopping time/emission rate inversion/carbon molecular diffusion model/terrain state functions分类
通用工业技术引用本文复制引用
刘悦,秦子依..双碳源情形下场外采样逆推排速的碳监测法[J].计量学报,2025,46(12):1737-1745,9.基金项目
国家社科面上项目(23BJY085) （23BJY085）
国家社科基金重大项目(22&ZD136) （22&ZD136）
江苏省碳达峰碳中和科技创新专项(BE2022612,BE2022610) （BE2022612,BE2022610）
