According to the idea of independent and continuous topological variables, a uniform exist null combined model of the bar element and the membrane element for the topological optimization is constructed to implement the transformation between continuous and discrete topological variables without using the filter function. 根据独立连续拓扑变量概念,建立了桁架和平面膜结构拓扑优化的有无复合体模型,从而不引入过滤函数实现拓扑变量在连续型和离散型之间的转换。
It transforms the double-differential carrier observation equation using null space transformation so that it need not to resolve real-time three-dimensional position parameters. 对单个历元的双差载波相位观测方程进行零空间变换,避免了实时变化的三维位置参数求解;
A Decomposition Problem of null Space of a Linear Transformation 一类线性变换的核分解问题