ameters can be "built in" DPC and NF loops or set primordially (the command is entered at their "birth" and they do not further vary any more), or can be entered through the command later, and these parameters can be changed by means of input of a new command from the outside. For this purpose there should be a channel of input of the command. Simple control block in itself cannot change any of these parameters. Absolutely all systems have control block, but it cannot be always found explicitly. In the aircraft or a spaceship this block is presented by the on-board computer, a box with electronics. In human beings and animals such block is the brain, or at least nervous system. But where is the control block located in a plant or bacterium? Where is the control block located in atom or molecule, or, for example, the control block in a nail? The easier the system, the more difficult it is for us to single out forms of control block habitual for us. However, it is present in any systems. Executive elements are responsible for the quality of result of action, while the control block - for its quantity. The control block can be, for example, intra-or internuclear and intermolecular connections/bonds. For example, in atom the SFU functions are performed by electrons, protons and neutrons, and those of control block by intra-nuclear forces or, in other words, interactions. The intra-atomic command, for example, is the condition that there can be no more than 2 electrons at the first electronic level, 8 electrons at the second level, etc., (periodic law determined by Pauli principle), this level being rigidly designated by quantum numbers. If the electron has somewise received additional energy and has risen above its level it cannot retain it for a long time and will go back, thereby releasing surplus of energy in the form of a photon. At that, not just any energy can lift the electron onto the other level, but only and only specific one (the corresponding quantum of energy). It also rises not just onto any level, but only onto the strictly preset one. If the energy of the external influence is less than the corresponding quantum, the electron level stabilization system would keep it in a former orbit (in a former condition) until the energy of external influence exceeded the corresponding level. If the energy of external influence is being continually accrued in a ramp-up mode, the electron would rise from one level to other not in a linear mode but by leaps (which are strictly defined by quantum laws) into higher orbits as soon as the energy of influence exceeds certain threshold levels. The number of levels of an electron's orbit in atom is probably very large and equal to the number of spectral lines of corresponding atom, but each level is strictly fixed and determined by quantum laws. Hence, some kind of mechanism (system of stabilization of quantum levels) strictly watches the performance of these laws, and this mechanism s...
