The competitive vehicle routing problem is one of the important issues in transportation area. In this paper a new method for competitive VRP with time windows and stochastic demand is introduced. In the presented method a three time bounds are given and the probability of arrival time between each time bound is assumed to be uniform. The demands of each customer are different in each time wind...

background conservative surgical treatment has been the treatment of choice for early breast cancer. it allows feasible oncological treatment with a satisfactory cosmetic approach and fast recovery. however, in some cases mastectomy is necessary. this study proposes a surgical approach with only one surgical access through the same incision, which is in line with precepts mentioned above. it is...

The dual-airflow window could be used to conserve energy and improve indoor air quality in buildings because it works like a heat exchanger and can introduce outdoor air into buildings. In order to optimize the window design, this investigation used the orthogonal method to evaluate the importance of these 13 design parameters of the dual airflow window in energy conservation: outdoor air suppl...