scholarly journals Radioelectronic Apparatus Design with Optimal Reliability Indicators

2018 ◽  
pp. 48-53
Author(s):  
B. M. Uvarov ◽  
A. V. Nikitchuk
Keyword(s):  
Apparatus Design ◽  
Reliability Indicators

Improvement of the Methodology for Determining Reliability Indicators of Oil and Gas Equipment

2018 ◽  
Vol 11 (1) ◽  
pp. 37 ◽  
Author(s):  
Vladimir Bukhtoyarov ◽  
Vadim Tynchenko ◽  
Eduard Petrovskiy ◽  
Valeriya Tynchenko ◽  
Vadim Zhukov
Keyword(s):  
Oil And Gas ◽  
Reliability Indicators

Validation to Spanish version of the COVID-19 Stress Scale

2020 ◽  
Author(s):  
Edgar Guillermo Pulido
Keyword(s):  
Mental Health ◽  
Goodness Of Fit ◽  
National Sample ◽  
Mitigation Strategies ◽  
Dimensional Structure ◽  
Psychosocial Effects ◽  
Stress Scale ◽  
Global Consensus ◽  
Reliability Indicators ◽  
Effective Assessment

There is a global consensus about the potential of the COVID-19 pandemic to affect people's mental health. In this context, and prior to the formulation of mitigation strategies, tools are required that allow an objective and effective assessment of mental health risk. The purpose of this study was to evaluate the psychometric characteristics of COVID-19 Stress Scale, formulated by Taylor et al. (2020), based on the concept of COVID-19 Stress Syndrome. A national sample of 1214 participating adults was taken in Colombia, who answered a translated version of the scale. Evidence of a hexa-dimensional structure was obtained whose goodness of fit indicators were Chi2 = 1215,759, Sig. =. 000, CMIN / DF = 2.202, RMSEA = .044, NFI = .943, TLI = .964, CFI =. 968 and FMIN = 1,967. Regarding reliability, an α = .924 and Spearman-Brown = .824 were obtained for the entire scale; the reliability indicators of the 6 subscales were also high. The similarities and differences in the findings with respect to the original psychometric study of the scale are discussed, as well as the utility and importance of the instrument as a tool in future efforts to mitigate the psychosocial effects of the pandemic.

TAKING INTO CONSIDERATION OF THE MULTIPLE MODE OF THE FUNCTIONING AND CHARACTERISTICS OF THE CONTROL IN RELIABILITY MODELS OF REPLACEMENT TIME SYSTEMS

2019 ◽  
Author(s):  
Iryna Kononova
Keyword(s):  
A Priori ◽  
Telecommunication System ◽  
Structural Element ◽  
Reliability Models ◽  
Quick Recovery ◽  
Reliability Indicators ◽  
A Priori Uncertainty ◽  
Control Of Parameters ◽  
Time Systems ◽  
Time Reserve

The article evaluates the reliability indicators of telecommunication system equipment, which can be represented by multi-mode objects of continuous and episodic use with a time reserve operating under conditions of a priori uncertainty. Particular attention is paid to consideration of the process of functioning of the system with a replenished time reserve. The telecommunication system includes an object represented by one structural element and used in different modes of operation. In each mode, the object can be used continuously or episodically (the object performs tasks that occur at random times), herewith only a certain part of its equipment is operating. The restoration of the facility's operation in each mode is based on the "quick" recovery scheme ("quick" recovery means that the repair time is much less than the average working time of the element between failures). Also, some cases of the transition of an object from one mode to another are considered, and the control system operates according to the method of sequential control of parameters. In this case, the system, after waiting mode, begins to analyze the first parameter of the monitored complex, then the second and so on. After analyzing the parameters, the system enters the waiting mode. These calculated ratios allow for a comprehensive assessment of the reliability of telecommunication equipment, taking into account the totality of the main factors that significantly affect the reliability of the equipment in real conditions of operation, make it possible to solve important practical problems which arise from the improvement of existing equipment and development of existing equipment.

DEVELOPMENT OF RELIABILITY PROJECT ESTIMATION PROCEDURE CONSIDERING EFFECTS OF IONIZING RADIATION FOR ELECTRONIC EQUIPMENT

2019 ◽  
pp. 57-63
Author(s):  
M. A. Artyukhova ◽  
S. N. Polesskiy
Keyword(s):  
Ionizing Radiation ◽  
Radiation Resistance ◽  
Power Plants ◽  
Estimation Procedure ◽  
Reliability Estimation ◽  
Electronic Equipment ◽  
Design Stage ◽  
Space Systems ◽  
Reliability Indicators ◽  
Project Estimation

Human activity is often accompanied by exposure of ionizing radiation: the exploitation of space systems and power plants, research using isotopic sources, medicine. The development of electronic equipment is regulated by carrying out activities to ensure the required reliability and radiation resistance. However, the effect of ionizing radiation on reliability indicators is not taken into account properly, or is not taken into account at all, that sometimes leads to the loss of expensive equipment and even to human victims. The article discusses the methodology for carrying out an adequate estimate of the reliability considering the influence of external influencing factors, including ionizing radiation. The timeliness of decisions making to ensure the required reliability indicators is determined by the completeness of the reliability estimation at the design stage. Effort to ensure the reliability and durability of devices after the design stage is not economically viable. The completeness and adequacy of the estimation always depends on the interaction of specialists in different fields: designers, programmers, experts in the field of circuit design, electrical engineering and experts in the field of reliability and radiation resistance.

ASSESSMENT OF THE RELIABILITY OF VACUUM PRECISION PIEZOELECTRIC RESONATORS ACCORDING TO THE RESULTS OF THE ACCUMULATION AND COMPILATION OF THEIR LIFE CYCLE

2018 ◽  
pp. 65-71 ◽  
Author(s):  
I. V. Arkhipova
Keyword(s):  
Life Cycle ◽  
Reliability Theory ◽  
Time To Failure ◽  
Bayesian Theorem ◽  
Piezoelectric Resonators ◽  
Reliability Indicators ◽  
Performance Requirements ◽  
Methodical Basis ◽  
New Ideas ◽  
Generalization Of Data

Within the framework of this article the question of reliability evaluation of resonators with strict performance requirements for resistance to external factors is considered. Due to the increase in requirements for these products in terms of gamma-percentile time to failure and gamma-percentile storageability time, there is a need to develop new ideas and methods of reliability theory. As a methodical basis for generalization of data of their life cycle the approach on the basis of Bayesian theorem is offered. Based on the results of generalization of the statistics of resonator tests for various types of climatic influences and reliability tests, as well as the results of their use in the electronic equipment have been identified their main reliability indicators.

Apparatus design of a process for extracting zinc out of low-concentration solutions from the manufacture of viscose fibre

1987 ◽  
Vol 19 (2) ◽  
pp. 143-146
Author(s):  
I. A. Birshtein ◽  
A. M. Volchek ◽  
A. I. Solodov ◽  
R. A. Yaroshevich ◽  
G. D. Kovalev ◽  
...  
Keyword(s):  
Viscose Fibre ◽  
Low Concentration ◽  
Apparatus Design
Sign in / Sign up

Export Citation Format

Share Document