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The high recombination rate of photogenerated charges is the main problem that limits the photocatalytic activity of semiconductor photocatalysts. Herein, we have reported novel heterojunctions of BiOBr–BiVO4 fabricated by depositing BiOBr nanoflakes onto the surface of BiVO4. The optimum photocatalytic activity of the 0.925BiOBr–0.075BiVO4 heterojunction was almost 14 and 144 times as high as those...
The time-cost trade-off problem (TCTP) is an important branch in the project scheduling problem. However, the duration and cost of each activity could change stochastically as a result of uncertain factors. To meet the needs of real projects, an improved approach based on trapezoid fuzzy numbers is applied to estimate the uncertainty of time and cost. And then α-cut method is applied to decide the...
Scheduling for modern professional sports leagues has drawn considerable attention in recent years in that their practical applications involve significant revenues and generate challenging combinatorial optimization problems. The Traveling Tournament Problem is a sports scheduling problem that abstracts the important issues in creating time tables: feasibility and team travel, where the objective...
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