ANALYSIS OF DISTRIBUTIONS TYPES FOR MODELING FLOW OF SHIPS IN THE PASSENGER PORT

This article presents a comparison of various types of mathematical distributions for arriving flow of ships using imitation model of the marine passenger port of St. Petersburg. In the course of analyzing the arrivals of cruise ships at the port in the past years, a confidence interval was determined in which the predicted number of ships entering the passenger port may fluctuate. Determination of possible fluctuations of incoming flow significantly simplifies the process of making management decisions in the port under conditions of uncertainty.

Real Number Modeling Flow of Digital to Analog Converter

This work introduces a flow of digital to analog (DAC) implementation in digital environment of SystemVerilog. Unlike the classical Verilog models, this digital to analog converter behavioral model is analog. Such type of model creation in general is called real number modeling. The DAC model is verified by the HSPICE and SystemVerilog Co-simulations which show its applicability in different register transfer level verification environments. The digital environment with real number modeled DAC runs around 8 times faster than the same environment with SPICE model. At the same time, the output signal’s voltage difference between RNM and SPICE models is less than 2 mV.