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Articles 74401 - 74430 of 196126

Full-Text Articles in Engineering

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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Automation Of The Calculation Of Uncertainty Measurements., O.Sh Khakimov, G.A Gaziyev Oct 2018

Automation Of The Calculation Of Uncertainty Measurements., O.Sh Khakimov, G.A Gaziyev

Chemical Technology, Control and Management

The work presented in this report described a program that allows calculating the results of direct and indirect measurements, evaluates their standard, total and extended type A and B uncertainties by reduction and linearization methods, calculate the sensitivity coefficients of the output (measured) value estimation, to changes in the estimates of input quantities (BB), the contribution of standard uncertainties (СН) ВВ to the total СН of type A and type B, determine the coverage factor, to make the budget of uncertainty of measurements.

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Models Of Multi-Ordinary Mechatronic Models Of Intellectual Robots., H.N Nazarov, N.R Matyokubov Oct 2018

Models Of Multi-Ordinary Mechatronic Models Of Intellectual Robots., H.N Nazarov, N.R Matyokubov

Chemical Technology, Control and Management

In the article mathematic description of mechatronic module in intelligent robots and robotic systems are observed. To display the structure of mechatronic modules, which consist of interrelated different electrical, magnetic and mechatron components, mathematic models by the help of multiplication theory based on relations and visualising lines and points are designed. Analytical explanation of mechantronic modele in intelligent robots is provided.

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Virtual Analyser Of Quality Of Liquid Products., U.A Ruziev, M.K Shodiev Oct 2018

Virtual Analyser Of Quality Of Liquid Products., U.A Ruziev, M.K Shodiev

Chemical Technology, Control and Management

The conceptual foundations of the construction of virtual analysers and their application in systems for monitoring the state of continuous technological processes are considered. A parametric model of process control is proposed, allowing to structure a multitude of virtual analysers and determine the types of their functionality. An approach to the problem of building a unified virtual monitoring system based on a matrix of typical virtual analysers has been studied.

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System Of Adaptive Control Of Technological Parameters Of Production Of Soda., N.U Uteuliev, N.S Yakubova, K.I Usmanov, D.B Yadgarva Oct 2018

System Of Adaptive Control Of Technological Parameters Of Production Of Soda., N.U Uteuliev, N.S Yakubova, K.I Usmanov, D.B Yadgarva

Chemical Technology, Control and Management

A systematic analysis of the existing system of analytical control of technological parameters for the production of soda ash is made. It is investigated as an adaptive control object, which operatively changes its parameters depending on the real state of the controlled technological process. A technique is proposed for determining the frequency of the removal of technological parameters, based on methods of mathematical statistics and based on the analysis of experimental data of a particular process.

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Realization Of Optical Modulators For Fiber Optic Sensors., A.M Nazarov, M.M Xasanov, A.B Jabborov, U.D Yusupova Oct 2018

Realization Of Optical Modulators For Fiber Optic Sensors., A.M Nazarov, M.M Xasanov, A.B Jabborov, U.D Yusupova

Chemical Technology, Control and Management

The principles of realization of solid-state optical modulators for building fiber-optic sensors are considered in the article. The electro-optical effect used by many optical modulators is described. Detailed volume modulators based on electro-optical and acousto-optic effects are presented. Integral-optical modulators with phase and interferometric intensity modulation, as well as pure-fiber optical modulators with phase modulation are described with description. Modulator models in the form of equivalent circuits with lumped parameters and methods for obtaining the frequency characteristics of optical modulators. The implementation of a fiber-optic frequency converter is presented, in which an acoustic wave from a sensor element perturbs two …

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Informational Effective Contact Measuring Transducers For Modern Control And Management Systems In The Agricultural Sphere., A.M Plakhtiev, E.V Ivanova Oct 2018

Informational Effective Contact Measuring Transducers For Modern Control And Management Systems In The Agricultural Sphere., A.M Plakhtiev, E.V Ivanova

Chemical Technology, Control and Management

The article shows the necessity of application of irrigation systems, power supply, control and automation of hydraulic structures and pumping stations of noncontact conversion and measurement of large direct currents with the help of effective information measuring magnetomodulation noncontact ferromagnetic converters for the needs of amelioration and irrigation in the electric power industry, and results are presented on the development of such converters .

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The System Individualized Principles Of Management Of Technologies Of Field Husbandry., V.A Korolev, A.M Bashilov, Z.O Eshmuradov Oct 2018

The System Individualized Principles Of Management Of Technologies Of Field Husbandry., V.A Korolev, A.M Bashilov, Z.O Eshmuradov

Chemical Technology, Control and Management

The system and organized, local individualized agrotechnologies provide on the land ground divided into priority zones, the simultaneous parallel and interconnected performance of a complex of technological operations on production of crop production: operations on preparation of seeds of an agriculture, cultivation of seedling, laying of seedling to the soil, to cultivation of an agriculture, stimulation of her development. Interaction between the carried-out processes is carried out in real time with a possibility of necessary corrections of processes during their performance. A considerable part of technological operations realize without rendering negative impacts on an agriculture, the soil and the environment, …

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Measured Property Of Objects In Analytical Measurements., B.M Ahmedov, R.A Ibragimov, A.S Rashidov Oct 2018

Measured Property Of Objects In Analytical Measurements., B.M Ahmedov, R.A Ibragimov, A.S Rashidov

Chemical Technology, Control and Management

The paper presents analytical measurements for the study of the object under investigation, while the property of the measured objects is considered. Aspects of measurement aimed at defining the physical properties of the physical value, including the purpose and concept of measurement were defined, which includes the study or evaluation of any properties of the object in analytical measurements. The results of experiments for valid objects are presented that are determined by infinite number of properties to obtain measurement results that are adequate to the measurement purpose. For that certain properties of objects are regarded as measured values that are …

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Formalization Of Tasks Of Synthesis Of Intellectual Control Systems Of Technological Processes Of High-Speed Railway Transport., Baratov . Dilshod, Aripov Nazirjon, Ruziev Davron Oct 2018

Formalization Of Tasks Of Synthesis Of Intellectual Control Systems Of Technological Processes Of High-Speed Railway Transport., Baratov . Dilshod, Aripov Nazirjon, Ruziev Davron

Chemical Technology, Control and Management

The article describes the stages of development of high-speed rail on the Railways of Uzbekistan, peculiarities of electronic document management of technical documentation of railway automatics and telemechanics. The considered problem of synthesis of mathematical descriptions of electronic document management of technical documentation of railway automatics and telemechanics. The article describes the formalized representation of electronic document management of technical documentation of railway automatics and telemechanics.

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Modeling And Research Of Circuitsof Intelligent Sensors And Measurement Systemswith Distributed Parameters And Values., I. Siddikov, Kh. Sattarov, H. Khujamatov Oct 2018

Modeling And Research Of Circuitsof Intelligent Sensors And Measurement Systemswith Distributed Parameters And Values., I. Siddikov, Kh. Sattarov, H. Khujamatov

Chemical Technology, Control and Management

transforming circuits of intelligence transducer, current sensors - transducers, research input and output signals of intelligent sensors and measurement systems

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Sustainable Algorithms For Synthesis Of Local-Optimal Adaptive Dynamic Object Management Systems., H.Z Igamberdiyev, J.U Sevinov, A.N Yusupbekov, O.O Zaripov Oct 2018

Sustainable Algorithms For Synthesis Of Local-Optimal Adaptive Dynamic Object Management Systems., H.Z Igamberdiyev, J.U Sevinov, A.N Yusupbekov, O.O Zaripov

Chemical Technology, Control and Management

Stable algorithms for the formation of control actions in local-optimal adaptive control systems for dynamic objects are given. Considering that the initial equations for estimating the parameters of an object and a control device, as a rule, are ill-conditioned, it becomes necessary to use regular methods. The stable algorithms for finding the desired solutions based on the methods of the minimum pseudoinverse matrix and singular decomposition, which contribute to improving the accuracy of the formation of control actions, are given.

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Nonlinear Dynamics With Chaotic Processes In Biotechnology And Genetic Engineering., M.A Ismailov, M. Saidalieva, M.B Hidirova Oct 2018

Nonlinear Dynamics With Chaotic Processes In Biotechnology And Genetic Engineering., M.A Ismailov, M. Saidalieva, M.B Hidirova

Chemical Technology, Control and Management

This paper deals with modeling genetic systems activity during manipulation of an organism’s genes using biotechnology. Computational experiments show that at certain values of internal and external cellular conditions there are exist the following regimes: stationary state, auto-oscillations and chaotic behavior of gene regulatory network linkages.

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Algorithm For Optimization Of The Membership Function Of The Fuzzy Control Model On The Basis Of The Probabilistic Approach., I.Kh Siddikov, S.T Yunusova, R.N Izmaylova Oct 2018

Algorithm For Optimization Of The Membership Function Of The Fuzzy Control Model On The Basis Of The Probabilistic Approach., I.Kh Siddikov, S.T Yunusova, R.N Izmaylova

Chemical Technology, Control and Management

The problem of optimization of the fuzzy control model of the drying unit in the cotton ginning industry operating under conditions of a priori uncertainty is considered. As an example, the process of temperature control in a drying unit is considered. As methods of optimization, it is proposed to use probabilistic methods. As an optimization parameter, the fuzzy model membership functions are used. A comparative analysis of the results obtained on the basis of simulation modeling before and after optimization is carried out.

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