METHODS FOR ENSURING THE STABILITY OF THE ELECTRONIC COMPONENT BASE IN TERMS OF REVERSIBLE SINGLE EVENTS

2021 ◽  
Vol 14 (1) ◽  
pp. 27-32
Author(s):  
Aleksandr Kozyukov ◽  
G. Raspopov ◽  
A. Yankov ◽  
Konstantin Zolnikov ◽  
Svetlana Evdokimova

The problem of ensuring the stability of the electronic component base in the event of reversible single events and its solution by N-fold redundancy methods is considered. The paper presents a description, scheme, advantages and disadvantages of N-fold redundancy methods, such as duplication with a loaded backup element, various modifications of redundancy, sliding redundancy, and the use of a watchdog timer.

2021 ◽  
Vol 14 (1) ◽  
pp. 10-16
Author(s):  
Aleksandr Kozyukov ◽  
Vladimir Zolnikov ◽  
Svetlana Evdokimova ◽  
Oleg Kvasov ◽  
Konstantin Yakovlev ◽  
...  

The article discusses algorithmic methods for ensuring the fault tolerance of the electronic component base (ECB). The protection methods used in regular and irregular structures are described. The essence of Hamming code algorithms, composite code, error correction and detection codes is revealed. The advantages and disadvantages of using arithmetic residual code, the method of redundancy at the level of program code fragments, are shown.


2020 ◽  
Vol 4 (141) ◽  
pp. 114-122
Author(s):  
DAR’YA LEBEDEVA ◽  
◽  
ANNA KARPUNICHEVA

Large forces and significant thermal effects are created on the rolls when rolling sheets. The higher the stability of the rolls, the less downtime during their rerolling and higher productivity. (Research purpose) The research purpose is in analyzing the ways of restoring rolls and choose the most appropriate method for restoring these parts. (Materials and methods) The article presents the analysis of the scientific and technical literature on the topic of rolling production, methods for restoring large-sized machine parts of machine-building and metallurgical industries that work in difficult conditions and are subject to a high degree of wear. Authors try to solve the problem by means of comparative and logical analysis based on theoretical and empirical methods of scientific research. (Results and discussion) The article presents two groups of methods for restoring rolled rolls: banding and surfacing the working layer of the roll. Authors have analyzed each method in terms of technology, equipment, and feasibility. The article presents the advantages and disadvantages of the methods under consideration. (Conclusions) The most acceptable way to restore parts with a high degree of wear is surfacing. It is most efficient to apply submerged surfacing using an additional hot additive. Such surfacing, despite some complication of the equipment design, allows to deposit the metal on the roll with low heat input and in most cases in one pass. Surfacing using an additional hot additive allows to increase the productivity of the process by up to 250 percent while reducing the penetration depth by 2-3 times and saving energy by up to 40 percent.


2019 ◽  
Vol 952 (10) ◽  
pp. 47-54
Author(s):  
A.V. Komissarov ◽  
A.V. Remizov ◽  
M.M. Shlyakhova ◽  
K.K. Yambaev

The authors consider hand-held laser scanners, as a new photogrammetric tool for obtaining three-dimensional models of objects. The principle of their work and the newest optical systems based on various sensors measuring the depth of space are described in detail. The method of simultaneous navigation and mapping (SLAM) used for combining single scans into point cloud is outlined. The formulated tasks and methods for performing studies of the DotProduct (USA) hand-held laser scanner DPI?8X based on a test site survey are presented. The accuracy requirements for determining the coordinates of polygon points are given. The essence of the performed experimental research of the DPI?8X scanner is described, including scanning of a test object at various scanner distances, shooting a test polygon from various scanner positions and building point cloud, repeatedly shooting the same area of the polygon to check the stability of the scanner. The data on the assessment of accuracy and analysis of research results are given. Fields of applying hand-held laser scanners, their advantages and disadvantages are identified.


Author(s):  
K. Al-Durgham ◽  
D. D. Lichti ◽  
I. Detchev ◽  
G. Kuntze ◽  
J. L. Ronsky

A fundamental task in photogrammetry is the temporal stability analysis of a camera/imaging-system’s calibration parameters. This is essential to validate the repeatability of the parameters’ estimation, to detect any behavioural changes in the camera/imaging system and to ensure precise photogrammetric products. Many stability analysis methods exist in the photogrammetric literature; each one has different methodological bases, and advantages and disadvantages. This paper presents a simple and rigorous stability analysis method that can be straightforwardly implemented for a single camera or an imaging system with multiple cameras. The basic collinearity model is used to capture differences between two calibration datasets, and to establish the stability analysis methodology. Geometric simulation is used as a tool to derive image and object space scenarios. Experiments were performed on real calibration datasets from a dual fluoroscopy (DF; X-ray-based) imaging system. The calibration data consisted of hundreds of images and thousands of image observations from six temporal points over a two-day period for a precise evaluation of the DF system stability. The stability of the DF system – for a single camera analysis – was found to be within a range of 0.01 to 0.66 mm in terms of 3D coordinates root-mean-square-error (RMSE), and 0.07 to 0.19 mm for dual cameras analysis. It is to the authors’ best knowledge that this work is the first to address the topic of DF stability analysis.


Author(s):  
Тарас Гриценко ◽  
Жанна Передера ◽  
Анна Теряева

В работе рассматривается возможность формирования в банковском секторе среды, в которой сотрудники смогут самостоятельно реализовывать цифровые инициативы для развития компании и самообучения. Обоснована необходимость её наличия. Проведен анализ соответствия поставленной проблемы российским и мировым трендам на основе изучения федеральных программ и оценок рейтинговых агентств. В результате исследования разработан бизнес-процесс реализации цифровых инициатив, про-веден конкурентный анализ его преимуществ и недостатков перед традиционным подходом к обучению. The article discusses the possibility of forming in the banking business an environment in which employees will be able to in-dependently implement digital initiatives for the development of the company and self-learning. The necessity of its presence is grounded. The analysis of compliance of the problem with the trends in Russia and the world based on the study of Federal programs and ratings agencies. To attract new staff with the necessary knowledge, banks have a number of tools - business classes, sponsorship programs, mentoring, hackathons, man-agement fights, case-championships, etc. It has been revealed that new professionals with technical skills can solve complex problems and generate products. But it’s difficult for them to dive into the banking sector, study its features and offer their own solutions to problems. It was also revealed that the company is interested in product results that are practice oriented. Com-bining product results and training is only possible by creating an environment in which they can discuss their ideas, find sup-port and implement them. As a result, a business process for the implementation of digital initiatives has been formed, a competi-tive analysis of its advantages and disadvantages over the tradi-tional approach to training has been conducted. strategies. The leading method of research is the definitions according grouping to the principles of the matrix method. It was revealed that the economic security concept is disclosed using factors freely com-bined into three groups (includes: sustainability, protection of interests, ensuring sovereignty), and the most common definitions are built using words-markers: state, security, advantage, process. One of the main study results is an algorithm for constructing the definition of the economic security concept, which allows to model and refine the definition of the concept based on the initial categories, consider-ing the economic context. The author's definition is also formulated, which reflects the interrelation of such components as the protection of interests, the impact of threats, the stability preservation, inde-pendence, ensuring development, self-adaptation and self-reproduction.


Sensors ◽  
2020 ◽  
Vol 20 (1) ◽  
pp. 271
Author(s):  
Witold Mickiewicz ◽  
Michał Raczyński ◽  
Arkadiusz Parus

This article presents the functional properties of modified versions of the 2D pressure–pressure intensity probe allowing us to determine the vector of sound intensity on a plane using a mechatronic system with one or two miniature electret microphones. The introduction contains basic information about the application areas of the sound intensity and its measurement problems. Next, the principle of operation of the probes and the construction of the prototype measurement system are described. It was subjected to comparative analysis for the stability of obtained results and accuracy of directional characteristics in free field conditions. For this purpose, experiments were conducted to analyze the flow of acoustic power in an anechoic chamber using both (one- and two-microphone) probes. The results were used for a comparative metrological analysis of the described methods and to indicate the advantages and disadvantages of both constructions. The next part of the article presents an experiment concerning the measurement of the sound intensity impulse response of a room, which is an example of practical use of the probe to analyze reflections in the room, which can be used in sound engineering and architectural acoustics.


2014 ◽  
Vol 940 ◽  
pp. 336-338 ◽  
Author(s):  
You Jie Ma ◽  
Hong Kun Lu ◽  
Xue Song Zhou

Power storage technology serves to cut the peak and fill valley, regulate the power frequency, improve the stability, and raise the utilization coefficient of the grid in the power system. This paper introduces various types of storage technology such as superconducting magnetic energy storage, super capacitor energy storage, sodium sulfur battery, lithium ion, flow battery technology, and discusses their advantages and disadvantages. The development trend and the different applications of storage technology in the power system are also summarized.


1981 ◽  
Vol 11 ◽  
Author(s):  
W. Raab ◽  
C. Frohn ◽  
M.W. Schmidt

ABSTRACTThe geomechanical and mining-technological aspects of the construction of salt caverns as disposal chambers have been investigated during project phase 2, completed by mid 1981. With a view towards the stability analysis of such a cavern, FEM-estimates have been carried out and evaluated. From these it can be derived that- a rotational ellipsoid would be the most suitable shape- its dimensions should be 82 m (vertical axis) and 42 m (horizontal axis)- the distance (safety pillar) between the neighbouring caverns should be 170 m (vertical) and 180 m (horizontal).For practical engineering purposes the rotational ellipsoid can be modified into a cylinder with conic bottom and top. The numerical model simulated the short term as well as the long term characteristics of the surrounding salt rocks. The short term characteristics were assessed by an elastic approach, the long term characteristics by a rheological model. The input parameters have been determined by means of laboratory tests on ASSE rock salt.In a second step the characteristics of partially and completely filled caverns were simulated. It was shown clearly that deformation of the salt rock comes to a halt when counteracted by the filling.Based upon the results of the stability analysis, investigations were made to find out a suitable mining technique for the construction of the cavern. Solution mining and conventional development by means of drilling and blasting have been studied alternatively. Since both methods have their advantages and disadvantages a decision in favour of the one or the other cannot be made until the actual site has been defined.


2018 ◽  
Vol 18 ◽  
pp. 444-454
Author(s):  
A. V. Batig

The research on rolling stock stability condition for derailment was carried out by many foreign and domestic scientists, each of them proposed its own methods and approaches to its calculation. Each of proposed methods and approaches has its advantages and disadvantages that are analyzed in detail. Besides the method of determining the stability margin coefficient for derailment of rolling stock is indicated in currently accepted norms for calculation and design of railcars track of 1520 mm, in European standards. However, calculations based on the norms that are used for railways track of 1520 mm do not give an opportunity to take into account the parameters of the rail track, namely the irregularities in both the vertical and horizontal planes that occur during operation. So, calculations of traffic safety criteria according to these standards do not allow to determine the effect of wear of wheel pairs and rail track. Moreover exceeding the permissible value of stability margin coefficient for derailment of rolling stock does not always lead to the rolling in of the wheel flange on the railhead. Because the ratio of vertical load to horizontal force can exceed the permissible value, but the gap between the wheel flange and the bar will not be exhausted. Check of stability conditions from a derailment of rolling stock on accepted by norms for model 11-286 car is executed. The basic lacks of the used method of calculation and ways of its improvement are resulted. Creation of mathematical models of railcars will allow to take into account main features of construction of running gears, wear of wheelsets, railtrack and determine the time when the gap between the wheel flange and the rail is exhausted (their dynamic interaction arises). We should also analyze the European experience in determining the criteria for traffic safety.


2021 ◽  
Vol 7 (5) ◽  
pp. 4963-4975
Author(s):  
Chao Zhou

Objectives: Based on the principles of sports biomechanics and long jump technical requirements, the technical factors affecting performance are discussed. Provide reference for the teaching, training and scientific research of the long jump project in China, improve and perfect the special sports technology and quality. Methods: In this study, the excellent men’s long jump athletes at home and abroad in recent years are taken as research objects, and the sports biomechanical method is used on the basis of collecting and compiling large amounts of data in previous studies. Results: This paper makes a comparative analysis of the characteristics of run-up and Take-off Techniques of Chinese and foreign elite male long jumpers, in order to find out the advantages and disadvantages of Chinese athletes and provide reference data for the training of Chinese long jumpers. Conclusion: The research shows that the take-off technique is the key in the whole long jump. The take-off angle is an important factor that restricts the performance of long jumpers, and the stability of the brake point when the board is attached is more important.


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