在卫星精密定轨中，Y=BX+V，其中B矩阵又包含了观测几何矩阵和状态转移矩阵，本程序计算了B矩阵。-In Precise Orbit Determination, Y = BX+ V, which also contains the observation matrix B geometric matrix and the state transition matrix, the program to calculate the B matrix.

马尔科夫链的实例——选民投票率预测 根据本次的投票率预测以后的投票率。 X为选民矩阵，T为状态转移矩阵，验证X月X*T所示的人数是一致的。-Instance of the Markov chain- voter turnout forecast to predict voter turnout in the future based on voter turnout. T is the state transition matrix, to verify that X months X*