On the ground of educative theory , this paper exposits connotation and characteristic of project - based learning and why we should also enforce project - based learning in high school . as far as substance of project - based learning and objective circumstance what it should have are concerned , it points out the practical ability . at last , based on that university physics education has relatively longer cycle , it proposes stage pattern for enforce project - based learning and give two concrete cases , which discuss capacitance of confocal oval - shaped stylar capacitor and potential distribution of charged conductor of surface being uniparted hyperboloid 本文在具体的教育理论指导下，阐述了研究性学习的内涵及特点；在大学物理中实施研究性学习的意义；以及就研究性学习的实质和所需具备的客观条件而言，论述了研究性学习在高校中实施的可行性；并根据大学物理教育具有周期性相对较长和专业循序渐进的特点，提出了研究性学习的阶段性模式，并给出了具体的实例，利用保角变换法讨论了共焦椭圆柱形电容器电容及单叶双曲面带电导体的电位分布。
The surface panel method has been applied to predict the hydrodynamic performance of highly skewed propeller . the surface of propeller and its trailing vortex are discreted by a number of small hyperboloidal quadrilateral panels with constant source and doublet distribution . for highly skewed propeller , the conventional method generating grid oriented along constant radii will result in a high aspect ratio and a high skewness and a twist panel near the propeller tip on blade surface , which result easily in incorrect calculation results of velovity on blade surface , even in iteration divergence and calculation failure . a “ non - conventional grid ” is developed to acoid these problems . this grid can effectively solve the problem of the calculation and convergence for highly skewed propeller . the non - linear kutta condition of equal pressure on upper and lower at the trailing edge is executed by the iterative procedure . by sample calculating , the obtained results are satisfied the experimental data 采用面元法预报大侧斜螺旋桨水动力性能，螺旋桨表面及尾涡面离散为四边形双曲面元，每个面元上布置等强度源汇和偶极子分布.对于大侧斜螺旋桨而言，桨叶表面采用常规的等半径网格划分方法在近叶梢处将导致大展弦比、大侧斜和扭曲面元，这容易使桨叶表面速度的计算结果不正确，甚至会导致迭代过程发散及计算失败.文中建立了一种“非常规网格”划分方法，能有效地解决大侧斜螺旋桨的计算和收敛问题.桨叶随边处通过迭代实现非线性等压库塔条件
