Potential development of dairy production in Sichuan Province, China

Abstract

Most existing 3D instance segmentation methods are derived from 3D semantic segmentation models. However, these indirect approaches suffer from certain limitations. They fail to fully leverage global and local semantic information for accurate prediction, which hampers the overall performance of the 3D instance segmentation framework. To address these issues, this paper presents PSGformer, a novel 3D instance segmentation network. PSGformer incorporates two key advancements to enhance the performance of 3D instance segmentation. Firstly, we propose a Multi-Level Semantic Aggregation Module, which effectively captures scene features by employing foreground point filtering and multi-radius aggregation. This module enables the acquisition of more detailed semantic information from global and local perspectives. Secondly, PSGformer introduces a Parallel Feature Fusion Transformer Module that independently processes super-point features and aggregated features using transformers. The model achieves a more comprehensive feature representation by the features which connect global and local features. We conducted extensive experiments on the ScanNetv2 dataset. Notably, PSGformer exceeds compared state-of-the-art methods by 2.2% on ScanNetv2 hidden test set in terms of mAP. Our code and models will be publicly released.

Characterizing Spatial and Temporal Variations in N2O Emissions from Dairy Manure Management in China Based on IPCC Methodology

“…As shown in Table 2, the proportions of four manure management systems in each time period were identified based on published documents and statistics [20][21][22][23][24]. In 1990-1999, manure treatment on dairy farms was rarely regulated in China.…”

“…After the Regulations on Prevention and Control of Animal Husbandry Pollution was issued in 2013, the utilization rate of dairy manure significantly increased. Due to the lack of data, average proportion of manure management systems in Zhejiang, Xinjiang, Beijing and Heilongjiang from 1990 to 2009 was referenced (Table 2) [20][21][22][23][24]. In 2010-2021, more detailed proportions of manure management systems were determined at the regional level (Table 3) [25][26][27].…”

“…Proportions of manure management system at different scaled farms from 1990 to 2009[20][21][22][23][24].…”