说明：  no intro
(Formula for calculating the trend vector processing, the use of Matlab procedures for the preparation of the tide, and Matlab m-file compiled into a COM component, can be simply the realization of Matlab and other programming languages mixed. Through a simple function call to complete, such as sparse, solve a series of mathematical equations, and easily achieve the related graphics rendering. Power flow calculation algorithm used in AMD coefficient matrix of the correction equation for node optimization, and the use of LDLT algorithm, effectively reduces injection yuan, doubling to improve computing speed. Programming in mixed mode, increased the speed of program development, program reliability, computational efficiency and confidentiality.)