نتایج جستجو برای: agricultural product
تعداد نتایج: 377333 فیلتر نتایج به سال:
For traditional agricultural product traceability system, there are some problems, such as information asymmetry and serious centralized storage. To solve the a set of an analysis system based on blockchain is designed. The overall framework built, model process designed in detail from data layer, consensus contract layer. Collaborative verification function modules added layer to ensure authen...
Problems such as the reduction of added value agricultural products and interruption supply caused by unstable collaborative relationship have seriously hindered high-quality development product chain. Promoting stable collaboration in chain is an urgent problem. Considering characteristic demand consumers for products, this paper takes mainly operating dominated farmer cooperatives research ob...
Field investigations on perfluoroalkyl acid (PFAA) levels in various environmental matrixes were reported, but there is still a lack of PFAA level data for agricultural environments, especially agricultural producing areas, so we collected soil, irrigation water and agricultural product samples from agricultural producing areas in the provinces of Liaoning, Shandong and Sichuan in China. The ba...
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