Gasoline accounts for about half the U.S. consumption of petroleum products, and its price is the most visible among these products. As such, changes in gasoline prices are always under public scrutiny. Many claim to observe an asymmetric relationship between gasoline and oil prices—specifically that gasoline prices respond more quickly when oil prices are rising than when oil prices are fallin...

oil seeds and crude vegetable oil are the raw materials used in vegetable oil producing industry. vegetable oil producing plants in iran are dependent on importing the material in a way that more than 90 percent of these materials are to be imported. soybean oil seed is the main oil seed utilized in the oil producing plants which is procured through importation from other countries. in the worl...

Scheduling of crude oil operations is an important and complex routine task in a refinery. It involves crude oil unloading, tank allocation, storage and blending of crudes, and CDU charging. Optimal crude oil scheduling can increase profits by exploiting cheaper but poor quality crudes, minimizing crude changeovers, avoiding ship demurrage, and managing crude inventory optimally. In our previou...