25 research outputs found
ВСМ: ИНТЕЛЛЕКТУАЛЬНЫЙ ПОДХОД
No full textThe theoretical basis of application of methods of artificial intelligence (expert systems, artificial neural networks, genetic algorithms) to organizational and technological decisions in construction of high-speed rail is provided in the article. The author describes an efficient method for implementation of such decisions with the use of information model and system of management decisions on the results of the monitoring of the construction process.Представлены теоретические основы применения методов искусственного интеллекта (экспертных систем, искусственных нейронных сетей, генетических алгоритмов) к разработке организационно-технологических решений в строительстве высокоскоростных магистралей (ВСМ). Описан вариант эффективной реализации подобной методики с использованием информационной модели и системы подготовки управленческих решений по результатам мониторинга строительного процесса
THE MAIN DEVELOPMENT DIRECTIONS OF ACTIVE RECREATION AND ACTIVE TOURISM IN OMSK REGION
No full textThe article deals with the development of active recreation and active tourism in Omsk region. The relevance of this direction is due to the growing interest in the types of recreation able to promote the rapid and effective recovery of a person. The article considers the meaning of the notions “active vacation” and “active tourism”, and points out the prevalence of substituting them. It occurs because this types of recreation are similar to other active types of human activity. The article considers the most popular directions and programs at the city and regional levels. The author notes that elements of active recreation and tourism, one way or another, are offered by many entities of the tourism sphere in the region. The regional infrastructure of active recreation and tourism includes several dozens of organizations, various communities, hobby clubs providing these services or uniting likminded people. The article defines the number of development trends in active recreation and tourism. Among them are the following: the expansion of a number of organizations of their activities from narrowly professional areas to the provision of services to a wide range of people; implementation at the regional level of programs aimed at the introduction of active forms of familiarization with the historical and cultural heritage of the native city; increasing the role in the development of active recreation and tourism of various communities, hobby clubs (automobile, bicycle, tourist), often acting as organizers and co-organizers of various social events; the outgrowth of communities and clubs of active recreation and tourism in the campaign engaged in the development and implementation of active tours.</jats:p
Adaptive digital technological regulations development for engineering and intellectual support for the railway track facilities construction
No full textThe article considers the developing possibilities of adaptive digital technological regulation for the railway track facility construction. Railway construction as a complex dynamic system requires certain resources for its maintenance. At the same time, it is characterized by the use of new, more advanced design solutions, materials, and technologies, the performers’ specialization development, and a large number of participants in the technological process associated with this. Under these conditions, effective control over the job practices performed during the railway track facilities construction is of decisive importance. This can be achieved by improving the existing engineering system and technical support for railway construction through the subsystem introduction for engineering and intellectual support of technological processes for the railway facilities construction. One of the tasks of engineering and intellectual support of technological processes is the effective use of automated systems, including those with artificial intelligence elements. Their creation and implementation are focused on achieving a single endresult: a finished railway track facility of the appropriate functional purpose within the established time frame, planned cost and labor costs and also meeting modern safety requirements throughout the entire operation period. As part of the methodology formation for engineering and intellectual support of railway construction technological processes, the structure of an adaptive digital technological regulation was developed — a digital regulatory document that defines the norms and rules for conducting the technological process of building a railway facility. A distinctive feature of the adaptive digital technological regulations is the possibility of its adjustment in an automated mode. The purpose of the adjustment is to adapt the technological process to the changing working conditions and the resource equipment of construction (contractor) organizations. At the same time, the information contained in the regulations can be transferred to 4D design and construction project management systems.
Based on the theoretical study results, the article presents practical aspects of the automated development of adaptive digital technological regulations on the example of the flooded railway roadbed construction.
The results presented in the article were obtained in the dissertation course research carried out by the author
Prime-sized multilevel flash memory with non-binary LDPC
No full textThesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2018.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Cataloged from student-submitted PDF version of thesis.Includes bibliographical references (pages 65-67).Flash memory companies are increasing the number of bits per cell to obtain higher information capacity per cell, starting from 1 bit/cell and going to 4 bits/cell recently. This scaling is enabled by the advancements in flash semiconductor technology, specifically the Bit Cost Scalable (BiCS) technology. However, capacity per cell scaling comes with performance, reliability, and endurance challenges. The industry has only used integer number of bits per cell, which makes the tradeoff between the capacity and the other system features less flexible than using fractional bits. This project explores programming 13 levels of charge ( 3.7 bits) into a QLC flash cell that normally carries 16 levels of charge (4 bits). We evaluate the 13-ary scheme against the 16-ary one and we show that the 13-ary has the same reliability at a lower SNR as the 16-ary, or the 13-ary has higher reliability than the 16-ary at the same SNR. We design binary and non-binary Quasi-Cyclic LDPC codes and implement Belief Propagation decoders for them.by Mohammed Al Ai Baky.M. Eng
Zero-error communication over adder MAC
No full textThesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2018.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Cataloged from student-submitted PDF version of thesis.Includes bibliographical references (pages 53-54).Adder MAC is a simple noiseless multiple-access channel (MAC), where if users send messages X₁, . . . ,X[subscript h] [epsilon] {0, 1}[superscript n], then the receiver receives Y = X₁ + · · · + X[subscript h] with addition over Z. Communication over the noiseless adder MAC has been studied for more than fifty years. There are two models of particular interest: uniquely decodable code tuples, and B[subscript h]-codes. In spite of the similarities between these two models, lower bounds and upper bounds of the optimal sum rate of uniquely decodable code tuple asymptotically match as number of users goes to infinity, while there is a gap of factor two between lower bounds and upper bounds of the optimal rate of B[subscript h]-codes. The best currently known B[subscript h]-codes for h >/- 3 are constructed using random coding. In this thesis, we study variants of the random coding method and related problems, in hope of achieving B[subscript h]-codes with better rate. Our contribution include the following. 1. We determine the rate achieved by changing the underlying distribution used in random coding. 2. We determine the rate of a list-decoding version of B[subscript h]-codes achieved by the random coding method. 3. We study several related problems about Rényi entropy.by Yuzhou Gu.M. Eng
Laser acceleration of protons with an optically shaped, near-critical hydrogen gas target
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