Abstract: A high-temperature forming device for imperfect single-crystal wafers used for a neutron monochromator includes a heating electric furnace, a temperature control system, a die system, a loading system, a vacuum protection system, and an auxiliary system. Where a furnace mouth of the heating electric furnace faces downwards, the heating electric furnace can be lifted vertically or a hearth of the heating electric furnace can be opened and closed. A vacuum protection cavity is formed by a glass cover and a blocking flange, a through hole is formed in one end of the glass cover, and the other end of the glass cover is closed. An operation opening is formed in the glass cover, the die system includes an upper die, a middle die, and a lower die, the middle die is a composite die.

Abstract: A high-temperature forming device for imperfect single-crystal wafers used for a neutron monochromator includes a heating electric furnace, a temperature control system, a die system, a loading system, a vacuum protection system, and an auxiliary system. Where a furnace mouth of the heating electric furnace faces downwards, the heating electric furnace can be lifted vertically or a hearth of the heating electric furnace can be opened and closed. A vacuum protection cavity is formed by a glass cover and a blocking flange, a through hole is formed in one end of the glass cover, and the other end of the glass cover is closed. An operation opening is formed in the glass cover, the die system includes an upper die, a middle die, and a lower die, the middle die is a composite die.

Abstract: “Grid Plus T Tree” multidimensional index method in memory database partitions the whole record sets to different grid cells. Every grid data unit is connected with one data barrel, which loads records, through the grid directory. Every data unit is only mapped with one data barrel. For memory database, setting up a “T Tree” with these data units according to one field, so as to set up one “T Tree” for each data barrel according to one field. Then the grid directory can be presented by a k-dimensional (the dimension of keyword) array. The field ranges of these data units are called scale. Scale is the memory range of each “T Tree”. This invention successfully overcomes the shortcomings that the current index methods for memory database neither efficiently use the memory space nor suits multi-dimension.

Abstract: “Grid Plus T Tree” multidimensional index method in memory database partitions the whole record sets to different grid cells. Every grid data unit is connected with one data barrel, which loads records, through the grid directory. Every data unit is only mapped with one data barrel. For memory database, setting up a “T Tree” with these data units according to one field, so as to set up one “T Tree” for each data barrel according to one field. Then the grid directory can be presented by a k-dimensional (the dimension of keyword) array. The field ranges of these data units are called scale. Scale is the memory range of each “T Tree”. This invention successfully overcomes the shortcomings that the current index methods for memory database neither efficiently use the memory space nor suits multi-dimension.