Abstract: In a system for optimization of method for determining material properties when searching for materials having defined properties, comprising a computing unit with a processor and a device for presentation of data and calculation results, and with access to data on materials, and a testing unit carrying out tests on real materials and communicating with the computing unit, the computing unit having a module (60) for construction of a model of an ideal material, which comprises a module (64) for calculation of complete sets of pairs of the energy eigenvalues Ei (i=1 . . .

Abstract: A three-phase power supply (10), intended especially to supply LEDs system (20), has a system of a diode bridge rectifier which comprises rectifying diodes (101, 102, 103, 104, 105, 106). The three-phase power supply (10) is additionally equipped with FETs and each of the rectifying diodes is bypassed by an FET of a rectifying unit (111, 112, 113, 114, 115, 116), respectively, which is controlled by a control system (40), comprising en anglogue-to-digital converter ADC 403, a digital-to-analogue converter (402), a microcontroller (401), which provides a control signal to a gate of the appropriate FET through the input/output (404). Once the control system (40), in particular the microcontroller (401), detects stable power supply conditions and starts operation of elements of an LED sequencer (30), it starts at the same time to control over the FETs in the active rectifier.