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At this stage, tourism poverty alleviation has become an important poverty alleviation method in China. Tourism is a green industry, and it also belongs to the sunrise industry. It can not only protect the rural ecological environment from poverty alleviation, but also mobilize the poverty-stricken people to lift poverty and increase income for the poor. In the context of the national rural revitalization strategy, this paper firstly discusses the basic framework of tourism poverty alleviation mechanism in theory, and then takes B village in Chongqing as a case, analyzes the tourism poverty alleviation mechanism from the current situation of B village, and discusses the precision of tourism poverty alleviation from the micro level. degree. Based on the survey data of the case village farmers questionnaire, analyze the poverty-stricken people's participation in poverty alleviation and benefit, and explore the practical effects of poverty alleviation. At the same time, the government's poverty alleviation cadres and village cadres conduct in-depth interviews to explore the effectiveness of poverty alleviation management measures and the poverty alleviation projects. Sex. The poverty alleviation mechanism of B village needs to be improved. Finally, this paper argues that although great achievements have been made in poverty alleviation by tourism in village B, there are still three problems as follows: poor households' participation is low, and their participation mode is passive; tourism products' competitiveness is poor, and resources development is confused; residents' participation motivation is insufficient and interests are unevenly distributed.
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The evolution of microstructure and hardness of quenched and tempered PRO500 high-strength armor steel was studied by means of optical microscopy and transmission electron microscope (TEM).The results show that the quenched microstructure at 870 ℃ was date-nucleated slab martensite. With the tempering temperature rising, martensite decomposed and fused gradually accompanied by the fine carbide particles precipitated and aggregated. Meanwhile the overall hardness declined gradually. Simultaneously the minimum hardness was 274 HV10 tempered at 600 ℃. When tempering at 400 ℃ the optimal combination of mechanical properties were obtained along with hardness 389 HV10, tensile strength 1 710 MPa, proof-strength 1 460 MPa and percentage elongation after fracture 11.0 %.
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