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Landslide susceptibility mapping based on static influence factors often exhibits issues of low accuracy and classification errors. To enhance the accuracy of susceptibility mapping, this study proposes a refined approach that integrates categorical boosting (CatBoost) with small baseline subset interferometric synthetic-aperture radar (SBAS-InSAR) results, achieving more precise and detailed susceptibility mapping. We utilized optical remote sensing images, the information value (IV) model, and fourteen influencing factors (elevation, slope, aspect, roughness, profile curvature, plane curvature, lithology, distance to faults, land use type, normalized difference vegetation index (NDVI), topographic wetness index (TWI), distance to rivers, distance to roads, and annual precipitation) to establish the IV-CatBoost landslide susceptibility mapping method. Subsequently, the Sentinel-1A ascending data from January 2021 to March 2023 were utilized to derive the deformation rates within the city of Lishui in the southern region of China. Based on the outcomes derived from IV-CatBoost and SBAS-InSAR, a discernment matrix was formulated to rectify inaccuracies in the partitioned regions, leading to the creation of a refined information value CatBoost integration (IVCI) landslide susceptibility mapping model. In the end, we utilized optical remote sensing interpretations alongside surface deformations obtained from SBAS-InSAR to cross-verify the excellence and accuracy of IVCI. Research findings indicate a distinct enhancement in susceptibility levels across 165,784 grids (149.20 km2) following the integration of SBAS-InSAR correction. The enhanced susceptibility classes and the spectral characteristics of remote sensing images closely correspond to the trends of SBAS-InSAR cumulative deformation, reflecting a high level of consistency with field-based conditions. These improved classifications effectively enhance the refinement of landslide susceptibility mapping. The refined susceptibility mapping approach proposed in this paper effectively enhances landslide prediction accuracy, providing valuable technical reference for landslide hazard prevention and control in the Lishui region. [ABSTRACT FROM AUTHOR]

In this paper, three typical agriculture residues (corn cob (CC), peanut shell (PS), and pine cone (PC)) from northeastern China were investigated for fast pyrolysis to produce bio-oil. The influences of carrier gas velocity, temperature, and particle size of biomass on bio-oil yield were studied. With the increase of carrier gas velocity, the bio-oil yield increased, but the increase rate of bio-oil yield first increased and then decreased. As temperature increased, the bio-oil yield first increased and then decreased. The variation trends of bio-oil yield with particle size for the three biomasses were different. For CC, the bio-oil yield increased with the reduction of the granularity; but it was completely opposite for PS and PC. The main components of the exhaust gas were CO2, CO, H2, and small quantities of CHx. The compounds of bio-oil were mostly with oxygen functional groups, resulting in the higher content of oxygen element, then leading to low calorific value. [ABSTRACT FROM AUTHOR]