A hierarchical MPI barrier synchronization algorithm creating groups of processes that share common re-
sources at the memory hierarchy levels (L2/L3 caches, NUMA node, socket) is proposed. Synchronization is
performed in groups at each level of the hierarchy. Experiments on a dual-socket server with two Huawei
Kunpeng processors (128 cores, 4 NUMA nodes) showed that the proposed algorithm with NUMA nodes
process grouping provides the minimum execution time compared to known methods and is resistant to differ-
ent schemes of process placement.
In this paper the possibility of using deterministic finite automaton to forecast time series in real time is con-
sidered. To solve this problem, a modification of the automaton with 10 reading heads designed to recognize
multilinear sequences is proposed. The article presents modifications of this automaton, algorithms for their
implementation, and demonstrates the results for various time series. In addition, the paper presents a method
for changing the algorithm of the automaton ensuring its step-by-step execution
The modern telecommunications market dictates the need to modernize the existing requirements for monitor-
ing and management systems of data transmission networks. The infrastructure of existing telecommunications
networks is continuously becoming more complex and expanding, therefore, modern troubleshooting and net-
work performance monitoring products must be equipped with the appropriate functionality. This paper deter-
mines the current requirements for modern systems, which must be taken into account when developing future
monitoring and management software products. This article examines the functional features of software sys-
tems used on the networks of telecom operators, namely: TEOCO Netrac 7, SATEL SOVA, EMC Smarts, HP
Network Node Manager, Zabbix, Cacti, NOC Project. Comparison and analysis are the tools used in this re-
search. The research topic meets the criteria of the Ministry of Digital Development, Communications and
Mass Communications of the Russian Federation (Federal Law No. 204-FL of June 23, 2016 "On Amendments
to Articles 2 and 24 of the Federal Law "On Communications")
In this paper a new cryptographic protocol for finding the meeting place of participants is proposed. This
protocol allows several participants to choose the meeting place closest to their locations not revealing the
coordinates of each of the participants. The protocol also allows to detect an error occurring during the transfer
of information between participants. The correctness and security of the used approach are proved, and the
main advantages and disadvantages are determined.
The paper proposes a simple method for determining the optimal frame length in the DVB-T2 standard based
on simple and understandable formulas based on the sequence of processing user data in the DVB-T2 standard.
There should always be an integer number of FEC blocks in a T2 frame, the remaining cells that do not make
up an entire FEC block will be dummy cells as a rule and represent a speed loss. As a result, the total bit rate
and the depth of interleaving in the smallest details depend on the exact number of OFDM characters, and
consequently, the cells in the T2 frame.
Mobile data network operators face increasing operational complexity and rising maintenance costs as the
number of equipment increases. As the number of base stations increases, so does the number of failures.
Modern technological solutions based on neural network algorithms are able to predict in advance with a
certain probability the occurrence of equipment failures. Data of operation and failures on the mobile net-
work equipment is required to train a neural network model. The article considers the performed data collec-
tion on the 4G mobile operator network, features and limitations that may further affect the model training
The total influence of self-phase modulation, phase cross-modulation and four-wave mixing effects and am-
plified spontaneous emission noise on transmitted pulsed signals noise immunity in a multichannel fiber-
optic transmission system with spectral division multiplexing is investigated. The investigation is carried out
under the conditions of transmitting system parameters variation: the total optical power level in optical fi-
ber, the transmission speed and the number of spectral channels. The estimate criterion of transmitted pulsed
signals noise immunity is Q-factor. The total Q-factor value dependence on the total optical power level in
optical fiber for various transmission speed and the number of spectral channels is demonstrated
A modified algorithm for positioning the navigation system of an autonomous uninhabited underwater vehicle
is proposed. It increases the accuracy of navigation in conditions of small inclined distances between position-
ing objects.
The operation of algorithms for identifying object’s contours using two-dimensional convolution operation
on the boundaries of raster images depends entirely on the location of the transformed pixel in the pixel ma-
trix. The problem is related to the need for the convolution algorithm itself to use an additional set of pixels
located outside the pixel matrix of the processed image [1, 2, 3]. In this paper, an algorithm for balanced in-
terpolation of pixels at image boundaries in addition to algorithms based on statistical averages [4, 5] is pro-
posed. Various sets of coefficients which are located at a certain pixel layout and participate in the interpola-
tion algorithm is considered. A comparative analysis of the results of the balanced interpolation algorithm
with the results using the arithmetic mean methods is carried out. Also, an example of using a new algorithm
to solve the problem of the object’s contours identification on the borders of a raster halftone image is pre-
sented. The described algorithm is easy to understand, use and integrate with other algorithms and it does not
require significant computing power
In this paper, the conductor model that can be used to design of various inductor layout configurations for
any Si and SiGe technological processes is considered. The experimental prototypes of the test inductors
were produced in the standard SiGe BiCMOS 130 nm process to verify the model. The chips measuring re-
sults showed that the characteristics of the prototypes taking into account the manufacturing tolerance are in
the range of model simulated values. It has been found that the proposed model has a better convergence
with the prototypes characteristics than 3D modeling. The equivalent circuit simulation speed can be orders
of magnitude higher than the 3D simulation speed. The proposed model accuracy is achieved by taking into
account the skin-effect and edge-effects in the dielectric and substrate. Using the skin-effect equivalent cir-
cuit the model can be run in Cadence Specter Simulator. It is necessary for the microwave LC-filters devel-
opment
