Методика оценки надежности вычислительной техники с учетом влияния отказов вспомогательного оборудования
The considered model of the failure rate of CMOS VHSIC design proposed in the article Piskun G.A., Alekseev V.F., "Improvement of mathematical models calculating of CMOS VLSIC taking into account features of impact of electrostatic discharge", published in the first issue of the journal "Technologies of electromagnetic compatibility" for the year 2016. It is shown that the authors claim that this model "...will more accurately assess the reliability of CMOS VHSIC design" is fundamentally flawed and its application will inevitably lead to inadequate results. Alternatively, the proposed model of the failure rate of CMOS VHSIC design, which also allows to take into account the views of ESD, but based on the use of resistance characteristics of CMOS VHSIC to the effects of ESD.
The article considers the questions assessing the reliability of mechanical components used in the electronic equipment in the early stages of design. The calculations of failure rates springs shock absorbers according to various methods. It is shown that the use of models failure rates of mechanical elements, taking into account the peculiarities of their structural and technological performance, not only allows us to solve the problem of calculating, but also to ensure the required level of reliability and mechanical components, and containing electronic equipment.
Mathematical models of failure rate of refusals the elements applied in calculations of reliability of the onboard electronic equipment are considered. Possibility of application the models given in foreign standards, for forecasting of reliability of completing elements is shown.
The main stages of forming a model of the failure rate of VHSIC/VHSIC-LIKE due to the impact of ESD. It is shown, that for the on-board space equipment likelihood of exposure to ESD may be determined on the basis of the characteristics of radiation situation.
This book constitutes the joint refereed proceedings of the 18th International Conference on Next Generation Wired/Wireless Advanced Networks and Systems, NEW2AN 2018, the 11th Conference on Internet of Things and Smart Spaces, ruSMART 2018. The 64 revised full papers presented were carefully reviewed and selected from 186 submissions. The papers of NEW2AN focus on advanced wireless networking and applications; lower-layer communication enablers; novel and innovative approaches to performance and efficiency analysis of ad-hoc and machine-type systems; employed game-theoretical formulations, Markov chain models, and advanced queuing theory; grapheme and other emerging material, photonics and optics; generation and processing of signals; and business aspects. The ruSMART papers deal with fully-customized applications and services.
The data center efﬁ ciency is accepted to evaluate as the ratio of all power consumed by the data center to the amount of power transferred for the operation of IT equipment (PUE). Thus, it becomes possible to calculate the amount of power expended on useful work and the amount of power expended on ancillary needs supplying power to IT-equipment. From the point of view of the data center, all the power transferred for IT-equipment is «useful». But is it? This article discusses the distribution and expenses of electricity «inside» IT-equipment, and also questions of an estimation of power efﬁ ciency of work of the IT equipment in total with power usage effectiveness of a data center are raised. Keywords: data center, Power Usage Effectiveness (PUE), power consumption.
This book constitutes the joint refereed proceedings of the 17th International Conference on Next Generation Wired/Wireless Advanced Networks and Systems, NEW2AN 2017, the 10th Conference on Internet of Things and Smart Spaces, ruSMART 2017. The 71 revised full papers presented were carefully reviewed and selected from 202 submissions. The papers of NEW2AN focus on advanced wireless networking and applications; lower-layer communication enablers; novel and innovative approaches to performance and efficiency analysis of ad-hoc and machine-type systems; employed game-theoretical formulations, Markov chain models, and advanced queuing theory; grapheme and other emerging material, photonics and optics; generation and processing of signals; and business aspects. The ruSMART papers deal with fully-customized applications and services. The NsCC Workshop papers capture the current state-of-the-art in the field of molecular and nanoscale communications such as information, communication and network theoretical analysis of molecular and nanonetwork, mobility in molecular and nanonetworks; novel and practical communication protocols; routing schemes and architectures; design/engineering/evaluation of molecular and nonoscale communication systems; potential applications and interconnections to the Internet (e.g. the Internet of Nano Things).
14th International Scientific-Technical Conference on Actual Problems of Electronics Instrument Engineering, APEIE 2018 - Proceedings
The presented review ‘Solar and geomagnetic activity dynamics' contains the analysis of modern perceptions of relations between the geomagnetic activity and dynamic processes in the solar corona. The relations between the geomagnetic activity and solar processes were revealed in the mid-XIX century. The correlation of the number of solar bursts with the number of geomagnetic disturbances, as well as withthe number and brightness of aurorae was analyzed by Carrington in 1860, and 11-year periodicity in dynamics of the number of sunspots and dynamics of geomagnetic disturbances and aurorae was discovered. The geomagnetic activity is generated as a response of magnetosphere processes to the change of the structure of solar wind streams, i.e. it actually reflects the changes of the solar corona structure in the process of solar activity development. The most significant large-scale variations of geomagnetic activity (magnetic disturbances or storms) are related to the influence of coronal ejections and high-speed solar wind streams. Magnetic storms are effective drivers of a number of magnetosphere processes, the dynamics of which considerably determines the possibility of using the near-Earth space by the modern hi-tech society. The study of geomagnetic activity dynamics is closely related to the necessity of resolving a number of technical problems that arise during the operation of industrial power supply systems, satellites and communication systems (GPS-navigation, shortwave communication).The first part of review ‘Geomagnetic activity sources, coronal mass ejection (CME), high-speed solar wind streams (HSS)' deals with the basic issues related to the impact of changes in the structure of solar wind streams under the influence of CME and HSS on geomagnetic activity. Particularly, the specific differences of dynamics of solar wind parameters in the CME and HSS structures are demonstrated. In the process of solar activity development, the annual distribution of the number of CME and HSS (main sources of magnetic storms) changes, and, respectively, the contribution of each structure to the annual distribution of the number of geomagnetic storms and to the geomagnetic activity also changes. Dynamics of geomagnetic activity under the influence of CME and HSS (dynamics of CME- and HSS-storms) is related to formation of a number of structures that arise in the solar wind during the motion of coronal ejections and high-speed streams in the interplanetary space. The area of interaction of a coronal ejection and surrounding solar wind expands in the interplanetary space and reaches~0,2 - 0,3 АЕ near the Earth. This area of perturbed solar wind is called Interplanetary Coronal Mass Ejection (ICME). In front of the ICME area, a number of perturbed solar wind structures arise: fast shock wave, a hot dense plasma sheath is formed between the shock wave and leading edge of the coronal ejection. One of the CME types is represented by magnetic clouds (MC). During the expansion of HSS, an area of interaction between the low-speed and high-speed solar wind streams (Corotating Interaction Region (CIR)) is formed in the solar wind. The gradual increase of the solar wind speed is accompanied by the plasma temperature and density rising, as well as increase of magnetic field; the maximum values of these parameters are generally recorded up to the speed maximum. The main drivers of geomagnetic activity dynamics are the structures of the solar wind streams, which have been formed near the Earth during the expansion of CME and HSS: these are shock, plasma sheath, ejecta for CME storms and CIR, and HSS for HSS storms. In the growth phase and at the maximum of solar activity, the main sources of moderate geomagnetic storms (>50%) are the structures formed at CME (ICME + shock); in the decay phase and at the minimum of solar activity, the main sources of moderate geomagnetic storms are the structures formed und er the influence of HSS (CIR + HSS). The presence of a negative Bz component of the interplanetary magnetic field (IMF) in the structures of the solar wind streams increases the probability of formation of a magnetic storm and augmentation of its power. The review uses the experimental data on dynamics of parameters of the solar wind and interplanetary magnetic field in the ICME and CIR structures.
This volume presents new results in the study and optimization of information transmission models in telecommunication networks using different approaches, mainly based on theiries of queueing systems and queueing networks .
The paper provides a number of proposed draft operational guidelines for technology measurement and includes a number of tentative technology definitions to be used for statistical purposes, principles for identification and classification of potentially growing technology areas, suggestions on the survey strategies and indicators. These are the key components of an internationally harmonized framework for collecting and interpreting technology data that would need to be further developed through a broader consultation process. A summary of definitions of technology already available in OECD manuals and the stocktaking results are provided in the Annex section.