With brief statements of the linear electro-optical modulation and magnetooptical modulation, using the method of resultant of optical amplitude vectors and the
Using the simulation test facility designed on the basis of similitude principle,the authors of the paper carry out a series of simulation tests and study the i
The first topic discussed in this paper is to evaluate the present supporting theories,among which the typical two are collapse arch and elasto-plastic theories
Seven schemes for the devoloping extension, four schemes for the mining of the whole field and five schemes for the parameter are put forward in this paper to r