To determine the dynamic influence range of emergencies under special events, the spacial and temporal characteristics of the traffic flow are studied by simulation based on the cell transmission model （CTM）. Based ...To determine the dynamic influence range of emergencies under special events, the spacial and temporal characteristics of the traffic flow are studied by simulation based on the cell transmission model （CTM）. Based on the traffic management measures used under special events, a semi-dynamic assignment algorithm is proposed, which is combined with an algorithm for logit multi-path traffic assignment and the CTM. In a simple calculation network, the spacial and temporal characteristics of traffic flows which vary with different traffic management schemes are studied, and a method to obtain the influence range of emergency is proposed by computing the jam time of the intersections. By contrasting the average delay of each vehicle, the dissipation effect is studied under two different traffic management schemes. The example shows that the spatial and temporal variety of the traffic flow can be easily simulated and the influence range of emergency can be confirmed by the method based on the CTM. The proposed method provides a new idea for decision-making on traffic management under emergency under special events.展开更多
为提高高校非计算机专业计算机基础的教学水平,加强培养非计算机专业学生应用计算机创新能力以及协作互助能力,将以问题为基础教学法(Problem based learning,PBL)和案例教学法(Case Teaching Method,CTM)联合应用于大学计算机基础教学...为提高高校非计算机专业计算机基础的教学水平,加强培养非计算机专业学生应用计算机创新能力以及协作互助能力,将以问题为基础教学法(Problem based learning,PBL)和案例教学法(Case Teaching Method,CTM)联合应用于大学计算机基础教学中,实践结果表明,教学效果良好,新型教学模式得到学生认可,考试成绩有所提高,加强了学生的自主探索能力和协作共事能力。展开更多
基金The National High Technology Research and Development Program of China(863 Program)(No.2007AA11Z210)
文摘To determine the dynamic influence range of emergencies under special events, the spacial and temporal characteristics of the traffic flow are studied by simulation based on the cell transmission model （CTM）. Based on the traffic management measures used under special events, a semi-dynamic assignment algorithm is proposed, which is combined with an algorithm for logit multi-path traffic assignment and the CTM. In a simple calculation network, the spacial and temporal characteristics of traffic flows which vary with different traffic management schemes are studied, and a method to obtain the influence range of emergency is proposed by computing the jam time of the intersections. By contrasting the average delay of each vehicle, the dissipation effect is studied under two different traffic management schemes. The example shows that the spatial and temporal variety of the traffic flow can be easily simulated and the influence range of emergency can be confirmed by the method based on the CTM. The proposed method provides a new idea for decision-making on traffic management under emergency under special events.
文摘为提高高校非计算机专业计算机基础的教学水平,加强培养非计算机专业学生应用计算机创新能力以及协作互助能力,将以问题为基础教学法(Problem based learning,PBL)和案例教学法(Case Teaching Method,CTM)联合应用于大学计算机基础教学中,实践结果表明,教学效果良好,新型教学模式得到学生认可,考试成绩有所提高,加强了学生的自主探索能力和协作共事能力。
