固支Mindlin 板弯曲问题的辛本征解

Hamiltonian system for the problem on clamped Mindlin plate bending was established by introducing the dual variables for the generalized displacements in this letter. By separation of variables, the transverse eigen-problem was derived based on the sympletic geometry method. With the solved sympletic eigen-values, the generalized sympletic eigen-solution was derived through eigenfunction expansion. An example of plate with all edges clamped was given. The sympletic solution system was worked out directly from the Hamiltonian system. It breaks the limitation of traditional analytic methods which need to select basis functions in advance. The results indicate that the sympletic solution method could find its more extensive applications.     

杭嘉湖与苏锡常物流业发展条件比较研究

用实证分析方法研究杭嘉湖与苏锡常物流业发展条件存在的差异，我们认为苏锡常比杭嘉湖经济总量更大，经济发展速度更快，经济外向程度更高，对物流市场需求的空间更广阔，物流供给条件和物流发展环境也较优。研究这种差异性，对促进两地区物流业的协调发展具有战略意义。