平面、空间桁架的计算程序：1、是计算在载荷作用下的平面桁架位移以及杆件的轴力。轴力符号规定，受拉为正，受压为负。另外还哼计算支座反力。 2、对桁架的节点编号，采取先编可动节点，接着再编固定节点。 3、计算多工况问题-Plane, the calculation of space truss: 1, is included in the load displacement of the plane truss, as well as the axial force rod. Symbol prov

实现图层的编辑，移动要素、增加删除节点等功能，可以自由选择要编辑的图层。-Layer editing, mobile elements, increasing delete node can freely select the layer you want to edit.

Mobile IPV6 code in network simulator for generate IPv6 address in all mobile node to configure hando-Mobile IPV6 code in network simulator for generate IPv6 address in all mobile node to configure handoff

设置有四个信标节点发射固定频率的声波信号，在另一个z轴平面有一移动节点以一定速度移动(Set up four beacon nodes at a fixed frequency acoustic signal, in another z axis plane one mobile node move at a certain speed)