快速路合流区加速车道通行能力模型求解方法

快速路合流区加速车道通行能力模型表达式比较复杂，普通方法难以求解．通过分析模型表达式，从精度、交互性和易于计算机实现的角度，给出2种可行的求解方法并使用VC＋＋予以实现，第1种方法，用数值方法求解高阶导数，进而求解模型表达式；第2种方法，基于组件技术，将通用语言的灵活性和MATLAB高精度的数学计算功能相结合来对模型进行求解．实验表明，2种方法都能得出正确的需求结果，前者程序稳定性、健壮性比后者好，但后者精度略高．实际工程中，可优先使用前者，后者可以作为对前者计算结果的进一步验证．

Methods for solving the traffic capacity model of acceleration lane on expressway merging area

Much inconvenience emerged when computing the traffic capacity of acceleration lane on the expressway merging area with traditional methods due to the complexity of the model expression.Based on the further analysis on the model,we developed two feasible solutions and used VC+ + to achieve it from the angle of the precision,interactivity and facilitating implementation.In the first method,it computed the higher order derivatives based on numerical method,and then solve the model expression.The second soluti...