Robule Lake, located in Eastern Serbia, near the city of Bor, is being influenced by waste materials from mining activities. For purification water contaminated with various metal ions (Fe, Cu, Zn, Mn, Cd, Ni, etc.), acid mine drainage (AMD) treatment methods such as: passive method, sequential neutralization, ion exchange, adsorption process based on low cost adsorbents, natural zeolits, elect...

Since no comparative advantage analysis system developed for agricultural products in China counties, this paper discussed how to use comparative advantage theory and Java language to design regional main grain comparative advantage analysis system. The system applies comparative advantage index calculation method to rapidly provide users with relevant data and analysis of grain production comp...