基于J2EE的物流信息管理系统 北京大学毕业论文 无需修改 直接使用-J2EE-based logistics information management system Peking University dissertation no need to modify the direct use of

newton raphson method for findin load flow problems j1,j2,j3,j4

计算各向同性硬化弹塑性模型，利用J2流动理论(The elastoplastic model of isotropic hardening is calculated by using J2 flow theory.)