Regional Differences and Dynamic Evolution of High-quality Development of Vegetable Industry in Guangdong Province

【Objective】With the increasing abundance of residents "vegetable baskets", certain changes have also taken place in the development of the vegetable industry. It is of great significance to construct an indicator system to explore its high-quality development level, and analyze its regional differences and dynamic evolution.【Method】Taking Guangdong, a major vegetable consumption province, as an example, based on panel data from various cities in the province (excluding Shenzhen) from 2015 to 2021, and by using the entropy TOPSIS method to measure the level of high-quality219 development of the vegetable industry, the research explores the regional differences and dynamic evolution laws of highquality development of vegetable industry through Dagum Gini coefficient, kernel density estimation, traditional and spatial Markov chains.【Result】(1) Since the 13th Five-Year Plan period, the high-quality development level of vegetable industry in Guangdong has shown a fluctuating upward trend, with high-level areas mainly being cities with larger vegetable planting areas. (2) The indicators for achievement sharing, productivity, and element support have all increased by over 25%, while the green and low-carbon dimensions have increased by over 20%. The vegetable supply dimension has the smallest increase, but also exceeded 10%. (3) The overall regional gap during the research period showed "first increasing and then decreasing", with some narrowing. The main source of the gap was the super variable density, followed by inter-regional gap, and then intra-regional gap. (4) The overall dynamic evolution of industrial development shows a positive trend, and the level transfer of development in the sample areas is stable. The probability of upward transfer in lower level cities is generally greater than that of downward transfer.【Conclusion】The vegetable industry in Guangdong is gradually moving towards high-quality development, and its regional differences and dynamic evolution show certain regular changes. It is recommended that multiple parties jointly build a provincial-level vegetable industry information platform and promote cold chain construction according to local conditions; intensify the breeding of vegetable varieties and focus on conducting research and promotion of green prevention and control technologies; differentiate and improve weak projects in different regions to enhance the high-quality development level of the vegetable industry

Evolution characteristics of micromechanics provides insights into the microstructure of pharmaceutical tablets fabricated by bimodal mixtures

Abstract This research focuses on the evolution of mechanical behavior of bimodal mixtures undergoing compaction and diametrical compression. The clusters were built and discrete element method (DEM) was used to investigate the densification process and micromechanics of bimodal mixtures. Additionally, a more comprehensive investigate of the respective breakage of the bimodal mixtures has been carried out. On this basis, qualitative and quantitative analysis of the compressive force, force chain, contact bonds and density field evolution characteristics of the clusters are investigated during the compression process. The entire loading process of the clusters is divided into three stages: rearrangement, breakage and elastic–plastic deformation. Additionally, there are differences in the evolution of micromechanics behavior of different particles in the bimodal mixture, with pregelatinized starch breakage and deformation occurring before microcrystalline cellulose. With the tablet deformation, the fragmentation process of the tablet started at the point of contact and extended toward the center, and the curvature of the force chain increased. This approach may potentially hold a valuable new information relevant to important transformation forms batch manufacturing to advanced manufacturing for the oral solid dosage form