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2018

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Articles 1321 - 1350 of 8951

Full-Text Articles in Engineering

Evaluation Of The Influence Of Inertial Force In The Vat Of Underground Pipelines In Seismic Impact, D. Bekmirzayev, N. Nishanov Oct 2018

Evaluation Of The Influence Of Inertial Force In The Vat Of Underground Pipelines In Seismic Impact, D. Bekmirzayev, N. Nishanov

Problems of Architecture and Construction

Evaluation of the influence of the power of inertia on the mode of deformation of underground pipelines under seismic exposure. The article analyzes the equations for the evaluation of the effect of inertia in seismo-dynamics of underground pipelines using analytical and numerical methods. The effects of the force of inertia are obtained by drawing a number of graphical results and estimating the underground pipelines.

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Calculation Of The More-Flying Coatings With Bended-Hard Truss, G. Freedman Oct 2018

Calculation Of The More-Flying Coatings With Bended-Hard Truss, G. Freedman

Problems of Architecture and Construction

The Article depicts the features of calculating the structures of the more-flying coatings in the form of cross-cutaneous–tight worst jointly with the supporting contour. The calculation program is used by the LIRA-CAD program, in which there are all means for solving geometrically-nonlinear problems.

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Calculation Of Thick Plates Of Variable Thickness In Three-Dimensional Formulation, D. Usarov, A. Yuvmitov Oct 2018

Calculation Of Thick Plates Of Variable Thickness In Three-Dimensional Formulation, D. Usarov, A. Yuvmitov

Problems of Architecture and Construction

Three-dimensional problem of bending and oscillations of orthotropic plates of variable thickness is considered in the paper. The problem is solved on the basis of the method of displacements expansion into an infinite series, which allows it to be reduced to solving a system of two-dimensional infinite recurrent equations.

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Magnetic And Electrocatalytic Properties Of Transition Metal Doped Mos2 Nanocrystals, Karthik Chinnathambi Oct 2018

Magnetic And Electrocatalytic Properties Of Transition Metal Doped Mos2 Nanocrystals, Karthik Chinnathambi

Materials Science and Engineering Faculty Publications and Presentations

In this paper, the magnetic and electrocatalytic properties of hydrothermally grown transition metal doped (10% of Co, Ni, Fe, and Mn) 2H-MoS2 nanocrystals (NCs) with a particle size 25–30 nm are reported. The pristine 2H-MoS2 NCs showed a mixture of canted anti-ferromagnetic and ferromagnetic behavior. While Co, Ni, and Fe doped MoS2 NCs revealed room temperature ferromagnetism, Mn doped MoS2 NCs showed room temperature paramagnetism, predominantly. The ground state of all the materials is found to be canted-antiferromagnetic phase. To study electrocatalytic performance for hydrogen evolution reaction, polarization curves were measured for undoped and the doped …

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Thermal And Mechanical Energy Harvesting Using Lead Sulfide Colloidal Quantum Dots, Taher Ghomian Oct 2018

Thermal And Mechanical Energy Harvesting Using Lead Sulfide Colloidal Quantum Dots, Taher Ghomian

LSU Doctoral Dissertations

The human body is an abundant source of energy in the form of heat and mechanical movement. The ability to harvest this energy can be useful for supplying low-consumption wearable and implantable devices. Thermoelectric materials are usually used to harvest human body heat for wearable devices; however, thermoelectric generators require temperature gradient across the device to perform appropriately. Since they need to attach to the heat source to absorb the heat, temperature equalization decreases their efficiencies. Moreover, the electrostatic energy harvester, working based on the variable capacitor structure, is the most compatible candidate for harvesting low-frequency-movement of the human body. …

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Teaching Cybersecurity In An Undergraduate Engineering Course, Xiuli Qu, Xiaohong Yuan Oct 2018

Teaching Cybersecurity In An Undergraduate Engineering Course, Xiuli Qu, Xiaohong Yuan

KSU Proceedings on Cybersecurity Education, Research and Practice

Organizations create a huge amount of sensitive and confidential data, which must be protected from unauthorized access or disclosure. Nowadays, most organizations store their business data in digital formats. With the increasing use of digital data, data breaches are more often and serious in recent years. Therefore, it is very important for next-generation engineers to be aware of the importance of information security, and be able to recognize vulnerabilities and threats to an information system and design user-friendly and effective security measures. To achieve it, two modules of information systems security, including lectures and in-class labs, were developed and taught …

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Study Of Physical Layer Security And Teaching Methods In Wireless Communications, Zhijian Xie, Christopher Horne Oct 2018

Study Of Physical Layer Security And Teaching Methods In Wireless Communications, Zhijian Xie, Christopher Horne

KSU Proceedings on Cybersecurity Education, Research and Practice

In most wireless channels, the signals propagate in all directions. For the communication between Alice and Bob, an Eavesdropper can receive the signals from both Alice and Bob as far as the Eavesdropper is in the range determined by the transmitting power. Through phased array antenna with beam tracking circuits or cooperative iteration, the signals are confined near the straight line connecting the positions of Alice and Bob, so it will largely reduce the valid placement of an Eavesdropper. Sometimes, this reduction can be prohibitive for Eavesdropper to wiretap the channel since the reduced space can be readily protected. Two …

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Strain Monitoring Of Concrete Components Using Embedded Carbon Nanofibers/Epoxy Sensors, Yanlei Wang, Yongshuai Wang, Baoguo Han, Baolin Wan, Gaochuang Cai, Zhizheng Li Oct 2018

Strain Monitoring Of Concrete Components Using Embedded Carbon Nanofibers/Epoxy Sensors, Yanlei Wang, Yongshuai Wang, Baoguo Han, Baolin Wan, Gaochuang Cai, Zhizheng Li

Civil and Environmental Engineering Faculty Research and Publications

In this study, embedded strain sensors based on the principle of piezoresistivity were fabricated by epoxy-based composites filled with different contents of carbon nanofibers (CNFs). The piezoresistive performances and relevant parameters including gauge factor, linearity, repeatability and hysteresis of these sensors were investigated. A compensation circuit was proposed to eliminate the influence of temperature on sensing signals of the sensors. The CNFs/epoxy sensors were embedded into concrete cylinders to monitor their compressive strains under monotonic and cyclic loadings, thereby assessing practical applications of the CNFs/epoxy sensors as strain sensors for monitoring concrete structures. The results indicate that the sensors containing …

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A New Thickness-Based Accelerated Aging Test Methodology For Resin Materials: Theory And Preliminary Experimental Study, Yanlei Wang, Xue Zhang, Gaochuang Cai, Baolin Wan, Danièle Waldmann, Yuan Qu Oct 2018

A New Thickness-Based Accelerated Aging Test Methodology For Resin Materials: Theory And Preliminary Experimental Study, Yanlei Wang, Xue Zhang, Gaochuang Cai, Baolin Wan, Danièle Waldmann, Yuan Qu

Civil and Environmental Engineering Faculty Research and Publications

This paper proposes a novel accelerated test method based on the thickness of resin materials. This method is to overcome the adverse influence of high temperature on the reliability of experimental results of the accelerated tests widely adopted in the current practice. To verify the proposed thickness-based accelerated method (ThAM), an experimental investigation was conducted focusing on the water absorption and tensile properties of epoxy resin. The results suggest that the existing temperature-based accelerated method (TAM) cannot be applied when the test temperature is high as in this case the degradation mechanism of materials is probably changed. The acceleration factor …

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Developing A Multi-Purpose Moisture Meter On Ultra High Frequency., Kh.A Usmanova, A. Turgunbaev Oct 2018

Developing A Multi-Purpose Moisture Meter On Ultra High Frequency., Kh.A Usmanova, A. Turgunbaev

Chemical Technology, Control and Management

The article deals with the problems of optimizing the design and structure of the moisture meter, which generally reduces to minimizing measurement errors by selecting the type of sample former and its basic parameters. The constructive, structural and algorithmic optimization methods proposed in the article allow to create a single unified complex of means for controlling the moisture content of fibrous and solid bulk materials that were used in the development of a multi-purpose microwave moisture meter for fibrous materials and granular products of the agro-industrial complex.

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Cloud System Of Pilot Production Management Based On Internet Of Things., Michail V. Ovsiannikov, Serguey A. Podkopaev, Valery B. Tarassov Oct 2018

Cloud System Of Pilot Production Management Based On Internet Of Things., Michail V. Ovsiannikov, Serguey A. Podkopaev, Valery B. Tarassov

Chemical Technology, Control and Management

Some theoretical background of Industrial Internet and Cloud Computing opening new era in industrial automation is considered. A prototype of cloud system for IoT-enabled production management is presented. Its first version is based on Denford’s equipment for manufacturing education and SAP HANA Cloud Platform. Main functions of cloud production management system are discussed. An architecture of «Denford-BMSTU» CIM system is shown. Basic components of SAP HCP are analyzed to clarify its implementation. Communication protocols between CIM devices and cloud platform are noticed. Examples of dispatching production rules are given.

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Construction Of Fuzzy Risk Assessment Models., T.F Bekmuratov, B.T Solieva Oct 2018

Construction Of Fuzzy Risk Assessment Models., T.F Bekmuratov, B.T Solieva

Chemical Technology, Control and Management

The tasks of making decisions on risk assessment, depending on the conditions of uncertainty, are divided into two types: decision-making tasks under conditions where the initial data are stochastic; decision-making tasks under conditions when the initial data are of a non-stochastic nature, and the necessary confidence limits for the parameters of the processes under investigation are unknown or unclear. In problems of the second type, risks are manifested to a greater extent than the first, since in solving problems it is necessary to take into account not only statistical uncertainty, but also linguistic. At the same time, one should consider …

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Problems Of Developing The Multi Agent Systems In The Tasks Of Management Technological Processes And Productions., Sh.M Gulyamov, S.S Kasimov, N.B Usmanova, D.A Mirzaev Oct 2018

Problems Of Developing The Multi Agent Systems In The Tasks Of Management Technological Processes And Productions., Sh.M Gulyamov, S.S Kasimov, N.B Usmanova, D.A Mirzaev

Chemical Technology, Control and Management

In this paper several issues related to the development of industrial multi-agent systems within scope of managing complex technological processes and production with taking into account: the variety of solution methods; the availability of variety of information subject to incomplete and dispersed nature of technological processes, uncertainty in models and wide range of time frames for various system tasks and production situations are considered. To show that or the full disclosure of the potential of multi-agent systems reconfigurable production systems with performance adaptation are in demand. The tasks of developing an agent architecture, its functional organization and creating an agent …

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Workflow Specification And Inference In Some Extension Of Allen’S Interval Logic., G.S Plesniewicz Oct 2018

Workflow Specification And Inference In Some Extension Of Allen’S Interval Logic., G.S Plesniewicz

Chemical Technology, Control and Management

A workflow is an automation of a process, in which agents (people or programs) are involved in activities for solving a set of tasks in order to attain a common goal. The concept of workflow appeared in business informatics. Currently, the workflow techniques are used in many other fields of informatics (medical and bioinformatics, organization of scientific researches, computer-aided design and manufacturing, robotics et al,) Many methods and formalisms were applied for specifying workflows. Specific logical languages were used for this. In particular, temporal logics are popular as workflow specification formalisms. Allen’s interval logic is the simplest temporal logic, but …

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Electrochemical Method Of Measuring The Antioxidant Activity Of Compounds Of Phenol Nature., V.Kh Shamsutdinova Oct 2018

Electrochemical Method Of Measuring The Antioxidant Activity Of Compounds Of Phenol Nature., V.Kh Shamsutdinova

Chemical Technology, Control and Management

The article describes one of the types of electrochemical methods for determining the antioxidant activity of compounds of phenolic nature - the method of voltammetry, which is one of the most common today. Experimental installations for the determination of antioxidant activity using voltammetry modified with various kinds of electrodes are given; in addition, the features of the chosen technique are given.

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Information-Algorithmic Support Of Decision-Making In Problems Of Primary Processing Of Cotton-Raw Processes., D.A Khalmatov, G.R Alimova, Kh.B Mirzaakhmedova, U.O Khujanazarov Oct 2018

Information-Algorithmic Support Of Decision-Making In Problems Of Primary Processing Of Cotton-Raw Processes., D.A Khalmatov, G.R Alimova, Kh.B Mirzaakhmedova, U.O Khujanazarov

Chemical Technology, Control and Management

On the basis of the system-structural approach the formalized multilevel structure of information interaction technological to operation at the clap-raw processing, allowing to present in the uniform form set diverse the information and providing uniform information base for technological monitoring at decision-making support. Situational models of process of functioning of the technological units, considering multi-variant approach of modes of functioning of the units corresponding to various industrial situations are developed. Algorithms of a choice of rational operating modes of technological units on the basis of the analysis of the generalised parametres corresponding to production schedules and operating modes of units …

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Application Of Wavelets For Forming Discrete Selections Of Continuous Signals., H.N Zaynidinov, M.B Zaynutdinova, I. Yusupov Oct 2018

Application Of Wavelets For Forming Discrete Selections Of Continuous Signals., H.N Zaynidinov, M.B Zaynutdinova, I. Yusupov

Chemical Technology, Control and Management

The paper deals with theory questions, as well as examples of calculations based on modern basis functions with compact carriers for solving problems of forming discrete samples of continuous signals with finite energy. The method is based on the law of asymptotic attenuation of the values of the wavelet coefficient moduli to zero as n → ∞, and the speed of their motion to zero depends on the choice of the wavelet. This method can be defined as the summation of the octave energy components of the coefficients of fast wavelet transformations with the binary law of decreasing sampling steps.

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Liquid Jet Penetration And Breakup In A Free Supersonic Gas Jet, Hansen Jones Oct 2018

Liquid Jet Penetration And Breakup In A Free Supersonic Gas Jet, Hansen Jones

LSU Master's Theses

In the testing of today’s rocket engines, both on large scale vertical test stands and smaller subscale horizontal component testing stands, it is extremely important to be able to accurately quantify and mitigate the thermal and acoustic loads the engines will generate on test stand infrastructure. Due to the large number of parameters that must be considered for many cases, development of a multi-phase computational code is under way to properly analyze and design water spray cooling systems used at NASA’s Stennis Space Center (SSC) and across other NASA centers. As such, a small-scale experiment has been conducted at Louisiana …

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Multi-Criterial Optimization Of Information Granules In Fuzzy If-Then Rules., R.A Aliev, O.H Huseynov, Nigar E. Adilova Oct 2018

Multi-Criterial Optimization Of Information Granules In Fuzzy If-Then Rules., R.A Aliev, O.H Huseynov, Nigar E. Adilova

Chemical Technology, Control and Management

Investigation of trade-off between characteristics of information granules for construction of fuzzy rule-based model is challenging scientific problem. Main optimization requirement in information granules estimation (antecedent and consequent parts of fuzzy rules) are cardinality which characterizes justifiability (reliability) of information granules in light of the available experimental data and specificity that characterizes semantics of information granules. This paper is devoted to a multi-criterial approach to solving of optimization problem of construction of interval and fuzzy information granules. Validity of the proposed approach is proved by numerical examples.

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Advantages Of Analytic Solutions Of Sentience Cloud Platform., N.R Yusupbekov, Somakumaran Sujith, Narwadkar Anand, F.R Abdurasulov, F.T Adilov Oct 2018

Advantages Of Analytic Solutions Of Sentience Cloud Platform., N.R Yusupbekov, Somakumaran Sujith, Narwadkar Anand, F.R Abdurasulov, F.T Adilov

Chemical Technology, Control and Management

The Internet of Things (IoT), Industry 4.0, and advanced analytics have generated enormous hype for their potential to transform businesses. This paper looks at different types of analytics and presents a pragmatic approach taken by Honeywell Connected Plant in application of analytics to gain insights from data in process industry.

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The System Of Full-Scale Modelling Of Movable Object With An Operator In The Control Loop., A.F Verlan, V.A Fedorchuk Oct 2018

The System Of Full-Scale Modelling Of Movable Object With An Operator In The Control Loop., A.F Verlan, V.A Fedorchuk

Chemical Technology, Control and Management

The principles of organization of a full-scale modelling of a moving object with an operator in its control loop are considered in the article. The task of reproducing the required dynamic characteristics, which the simulated moving object possesses, is solved by correcting the control signals for a moving object with similar dynamic properties. The developed method, for example, can be used to simulate the dynamic characteristics of the aircraft by another aircraft provided with a unit of adjustment of control.

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Sustainable Estimation Of Parameters And Covariation Of Disturbance Vectors In Uncertain Systems., H.Z Igamberdiyev, U.F Mamirov Oct 2018

Sustainable Estimation Of Parameters And Covariation Of Disturbance Vectors In Uncertain Systems., H.Z Igamberdiyev, U.F Mamirov

Chemical Technology, Control and Management

Algorithms for the formation of a procedure for the stable estimation of parameters matrices and covariances of perturbation vectors in indefinite dynamic systems based on the concepts of matrix pseudo-inversion are given. For stable pseudo-inversion, the matrix partitioning method is used using simplified regularization. The above algorithms allow for a stable estimation of the matrix of parameters and covariances of the perturbation vectors in dynamic systems and thereby increase the accuracy of adaptive control systems operating in parametric and signal uncertainty conditions.

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Analysis Challenge Protection Of Information From Attacks And Construction Of A Formal Model For Protecting Network Traffic., M.M Karimov, Sh.R Gulomov Oct 2018

Analysis Challenge Protection Of Information From Attacks And Construction Of A Formal Model For Protecting Network Traffic., M.M Karimov, Sh.R Gulomov

Chemical Technology, Control and Management

In this paper a formal model for protecting information from DDoS attacks, allows to improve the efficiency of computer networks, taking into account the interaction of detection modules and the use of formal set-theoretic constructions are proposed.

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Intelligent Information-Measuring Systems With Sensors Based On Diffraction Grating., М.А Urakseev, К.V Vazhdaev, А.R Sagadeev Oct 2018

Intelligent Information-Measuring Systems With Sensors Based On Diffraction Grating., М.А Urakseev, К.V Vazhdaev, А.R Sagadeev

Chemical Technology, Control and Management

The relevance of the present study devoted to the creation of modern information measuring systems with sensors based on diffraction gratings is shown. Information on the acousto-optic effect and acousto-optic materials is presented. A comparative assessment of the characteristics and possible applications of instruments and systems based on different physical effects and phenomena was carried out on foreign and domestic patent and technical literature. Based on the analysis of the literature, the task was set and the choice of effective ways of achieving the goal of the present work was accomplished. Perspective information and measuring systems with sensors based on …

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Facility Location Problem By Using Fuzzy Topsis Method., Kamala. Aliyeva Oct 2018

Facility Location Problem By Using Fuzzy Topsis Method., Kamala. Aliyeva

Chemical Technology, Control and Management

Facility location problems are long-term decision making problems for selection best geographical location to begin the operations of a new facility or for expansion of existing facilities. These are strategic investment decision including many factors that may be inconsistent in nature. To solve this problems, some alternatives based on different criteria’s need to be selected. To make a decision on such fuzzy problems, fuzzy multiple criteria decision making can be applied. In this paper, fuzzy multiple criteria decision making with TOPSIS and weighted product (WP) methods is used to select the best location of company facility. The results of solving …

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Using Of Sentience Platform For Integration Of Intelligent Systems And Devices Into Cloud., N.R Yusupbekov, Somakumaran Sujith, Narwadkar Anand, T.T Jurayev, Sh.B Sattarov Oct 2018

Using Of Sentience Platform For Integration Of Intelligent Systems And Devices Into Cloud., N.R Yusupbekov, Somakumaran Sujith, Narwadkar Anand, T.T Jurayev, Sh.B Sattarov

Chemical Technology, Control and Management

In this paper considered unique Sentience hardware-software cloud platform which provides special cloud framework for multiple devices and systems for connectivity to cloud and taking maximum advantageous from this connectivity. Cloud-connected solutions is next step in industrial IT-technologies which allows to decide many earlier problems by totally different way.

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Building Indicators Of Sustainable Development With The Use Of Multi-Criteria Decision Making Methods., V.B Britkov, R.D Zaitsev, R.A Perelet, G.V Royzenson Oct 2018

Building Indicators Of Sustainable Development With The Use Of Multi-Criteria Decision Making Methods., V.B Britkov, R.D Zaitsev, R.A Perelet, G.V Royzenson

Chemical Technology, Control and Management

An approach for analyzing big data is proposed with reference to sustainable development indicators (SDI), based on the application of combinations of various mathematical techniques. In particular, methods of multi-criteria decision-making for developing the SDI are described in the article. Examples of constructing UN SDI are given.

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Method For Diagnostic Of Permanent-Magnet Electrical Machines., F.R Ismagilov, V.Ye Vavilov, V.V Ayguzina Oct 2018

Method For Diagnostic Of Permanent-Magnet Electrical Machines., F.R Ismagilov, V.Ye Vavilov, V.V Ayguzina

Chemical Technology, Control and Management

This paper proves that the use of conventional diagnostic methods of rotor crack and local demagnetization based on the harmonic analysis of the output voltage or back-electromotive force is effective only with a certain ratio of the number of slots and poles. This statement was proved experimentally. The diagnostic method of the rotor cracks and local demagnetization which is universal for all types of windings and the number of slots of 2-pole synchronous electric machines with permanent magnets is proposed. The mathematical apparatus for the implementation of the proposed method is developed and is verified with the help of FEM …

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Optimization Of Forecast Of Non-Stationary Objects Based On Fuzzy Model Adapters At External Information Influence., O.I Djumanov, S.M Kholmonov Oct 2018

Optimization Of Forecast Of Non-Stationary Objects Based On Fuzzy Model Adapters At External Information Influence., O.I Djumanov, S.M Kholmonov

Chemical Technology, Control and Management

The tasks of taking into account the sensitivity of fuzzy modeling based on the mechanisms for determining the range of elements of randomly chosen time series and the correction of the parameters of the functions of the accessories of linguistic variables, the use of the data property and the specific features of objects, the database and the knowledge base are solved. Computational schemes of dynamic identification based on polynomial models, nonlinear filters with fuzzy variable adapters are constructed. The effectiveness of generalized algorithms of fuzzy identification of randomly time series (RTS) is proved by comparison with the values of the …

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Tasks And Mechanisms Of Distribution Costs And Incomes In Market Economy., B.S Yusupov Oct 2018

Tasks And Mechanisms Of Distribution Costs And Incomes In Market Economy., B.S Yusupov

Chemical Technology, Control and Management

The paper considers models and mechanisms of resource allocation that are interpreted in a meaningful way either as problems of allocating costs for the implementation of a common project (program) between participants (investors) interested in this project, or as problems of distributing income or profits received from joint activities of several participants. Agents can be legal entities and individuals, as well as federal and local governments. Various mechanisms of distribution of costs (incomes) are given-priority, competitive, fair play mechanisms, etc.

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