Анализ виртуального времени в оптимистическом алгоритме па-раллельного моделирования дискретных событий
The paper refers to the area of morphological processing of projection images and its goal is to design some computer models of basic operations, geometric properties and methods of pulsed optical tomography which provide a high-speed production operational control and sorting of each micro-objet (MO) of nuclear fuel in their flow according to their size and shape: image approximation of a three-dimensional MO and spatial geometric properties of its size and shape; generation operations of the pulsed discrete projection images of an MO and determination of the representative number and optimal view of images; operations of numerical determination of the optimal basic properties of each projection image; methods of dynamic reconstruction of spatial geometric properties of an MO based on the basic properties of its discrete projection images. Based on the proposed computer models, a precision laser method of industrial differential control and quality control of MO flow of nuclear fuel was developed and experimentally tested. The method uses the statistical reconstruction of the size (D) and shape (K) of each micro-object and take into account the overall dimensions of the outlines of three mutually orthogonal two-dimensional pulsed discrete projection images of a micro-object. The processing speed of this method is 100 MO/s in the diameter range of 400 – 1500 mkm. The relative error of an MO diameter control is no more than 0.25% (at the reliability of PD = 0.7 and K = 1.3 relative units), and the relative error of the non-sphericity coefficient control lies in the range of 2.3% (PK = 0.7 and K = 1.3 relative units) to 0.6% (PK = 0.96 and K = 1.05 relative units).
Abstract—We have performed computer simulations and experimental studies of characteristics of a standard analog device—the heterodyne employing a printed circuit board (PCB) made from a composite dielectric with a controlled dark conductivity. Simulation results show that an increased conductivity of the PCB smaller than 2 × 10^−7 Ohm^−1 · m^−1 has almost no effect on the operating characteristics of a heterodyne operating in the frequency range of 9–37 MHz, which are in a good agreement with the experimental data. Such PCBs are expected to exclude electrostatic discharges in spacecraft electronic devices otherwise occurring in them due to their internal charging by the ambient space plasma.