PROCEEDINGS

Proceedings

N:2

2019

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«Հայաստանի Գիտությունների Ազգային Ակադեմիայի և Հայաս­տանի պետական ճարտարագիտական համալսարանի տեղեկագիր. տեխ­նի­կական գիտություն­նե­րի սերիա» հանդեսում տպագրվում են տեսա­կան և փոր­ձա­րա­րական հե­տա­զոտությունների արդյունքները տեխնիկական գիտություն­ների հետևյալ բաժիններից՝ մեքենաշինություն, նյութագիտություն, շինարարական կառուցվածքներ, հիդրավլիկա և հիդրոտեխնիկական կառույցներ, էներգետիկա, էլեկտրատեխնիկա, գիտական սարքաշինություն և չափողական տեխնիկա, հաշվողական տեխնիկա և ինֆորմատիկա, ռադիոէլեկտրոնիկա, լազերային տեխնիկա, ավտոմատացում և կառավարման համակարգեր։ 
Հանդեսում լուսաբանվում են ակադեմիական և ճյուղային գիտահետազոտական ինստիտուտների, բուհերի, գիտաարտադրական միավորումների և այլ կազ­մակերպությունների գիտական գործունեության առավել կարևոր արդյունքները։ 
Հանդեսի հիմնական նպատակն է՝ խթանել գիտատեխնիկական առաջ­ըն­թացը և նպաստել արտադրության մեջ այդ արդյունքների ներդրմանը։ 
Հանդեսը նախատեսված է ճարտարագետների, հետազոտողների և գիտնականների լայն շրջանների համար։ Լույս է տեսնում երեք ամիսը մեկ անգամ։

Headings

  • источник возмущений

  • поверхностные волны

  • пьезоэлектрик

  • сдвиговые колебания

  • электроупругость

The problem of interaction of electrical and mechanical fields at the full contact of two piezoelectric half-spaces is considered. On the separation plane of the contact, a metallic thin layer is glued. Under the action of a linear source of the stationary shear vibrations, electroelastic shear waves propagate in the composite space. The wave field is represented by regular integrals on the cuts in the complex plane. The methods of the theory of functions of complex variable and contour integration are admitted. At certain values of the electroelastic parameters of the medium, shear waves localized at the contact plane propagate.

  • հանքաստիճան

  • հանքաքար

  • հորատանցք

  • պայթուցիկ նյութ:

The development of complex-structure deposits is accompanied by losses and dilution of the mined ore at the contact line (boundary) of the mineral and waste rock. In such deposits, it is more expedient to carry out selective excavation. However, in complex mines, due to the absence of a boundary between the mineral and the waste rock, development will require to limit the conditional sections of the block to be mined by testing the the geological wells. The paper proposes a new technology and a short control scheme for blasting operations, which will ensure the collapse of rocks separated from each other.

  • երկրաբանական օբյեկտ

  • հորատահանուկ

  • հորատանցք

  • հորատում

  • ուղղորդված հորատում:

  • տեխնիկա

  • տեխնոլոգիա

  • տեղեկաքանակ

  • տեղեկության քանակական չափ

This paper is devoted to clarifying the most common and basic principles for assessing the quality of drilling. The thesis that the quality of the drilling process can be defined as a measure for the compliance of this process with the purpose of drilling operations is adopted as the initial one. The quantitative characteristics of the information capacity of geological objects are investigated, and a mathematical model of the information structure of an exploratory intersection is proposed, taking into account the degree of knowledge of geological objects, the complexity of their structure and the purpose of geological studies.

  • ազնիվ մետաղների արգասիքներ

  • ածխածնային խտանյութ

  • աղային քլորացում

  • եռակալվածք

  • կորզում:

  • պլատինային խմբի մետաղներ

Studies have shown that in the course of chlorination of a carbon concentrate with a NaCl reagent (~ 800օ C) and at cupellation (920 … 960օ C), the product obtained as a result of development of a formed cake, losses of precious metals take place. These undesirable phenomena can be prevented by preliminary annealing of a carbon concentrate (to 600օ C), decomposition by chemical acid decomposition and alloying (450 … 560օ C) the obtained products with a mix of fusible salts on the basis of NaCl. It is also revealed that for extraction of precious metals from a structure of silicide products of the process of chlorination, it is expedient to apply the hydrometallurgical method of acid leaching that allows to restore the full extraction of gold and silver, and to bring platinum metals to 80%.

  • compass

  • gyroscope.

  • Kalman filter

  • magnetic declination

  • magnetometer

  • sensor fusion

This paper presents the accuracy enhancement of the observed magnetic declination by applying a sensor fusion algorithm. Sensor fusion is executed based on the Kalman filter, which uses the measurements of the gyroscope and the magnetometer (compass) and produces an estimate of the magnetic declination. The latter tends to be more accurate than the measurement itself. Implementation results of the Kalman filter are presented to verify the enhancement of the magnetic declination accuracy.

  • algorithms.

  • image classification

  • neural networks

  • object detection

  • systemic classifications

We aim to develop tools for regular transformation of combinatorial defense and competition problems’ situations to their symbolic presentation by machine learning solutions. As it is proven, that RGT class problems are reducible to each other, in this paper we demonstrate a developed ANN model to detect the chess board from an image and classify the chess pieces. Two models were developed – a simple one which provides high accuracy as some complex models worldwide, and the second approach (based on a new method), which correctly fits for other RGT problems with a bit lower accuracy.

  • low power; dynamic power; d flip-flop; pipelining.

In this article a new circuit technique to reduce the dynamic mode power of the D Flip-Flop is proposed. An enhancement over well-known Flip-Flop circuit is presented to reduce the number of transistors and hence to reduce the power consumption. The circuit is implemented and tested in SAED32nm library. An example of the circuit usage and method efficiency is provided in this paper.

  • ԱԷ ազդանշանի բնութագրիչ պարամետրեր

  • ԱԷԿ

  • ակուստիկ էմիսիա

  • Հսյու-Նիլսենի մեթոդ

  • չքայքայող ստուգում:

  • պիեզոէլեկտրական ձևափոխիչ

A system for registration pulse signals of acoustic emission (AE), analysis and determination of the characteristic parameters has been developed. For testing the system, two different AE imitators have been developed and implemented. The testing has shown that the developed system allows to determine 8 characteristic parameters of the AE signals. The system can be implemented for the experimental research, in particular for the development of the non-destructive testing method of the metal.

  • «կոշտ» բլոկ

  • բարիկենտրոնային ալգորիթմ

  • ինտեգրալ սխեմա

  • ֆիզիկական նախագծում

A method for automated reception of the physical structure of the digital integrated circuit (IC) units is proposed. The method is based on building a physical “soft” block of the circuit operation logic, taking into account the circuit operation logic, and obtaining from this the “hard” block. Obtaining the physical “soft” block is based on the ranking of the logic circuit. In order to move from a physical “soft” block to a “hard” one, a new method of element re-placement based on a modified barycenter algorithm is applied. An algorithm for constructing a “hard” block from a physical “soft” block, using the barycenter algorithm, and the corresponding software implementation has been developed. The results have shown the efficiency of the proposed method from the point of view of considering the circuit operation logic at the stage of physical design.

  • Memory diagnostics

  • Memory faults

  • Memory test

  • Test pattern.

  • Verification

With rapidly increasing density and capacity of nanoscale memory devices embedded in modern system-on-chips (SoC), new design problems are being introduced, as well as the requirements are strengthened towards test and diagnosis for achieving higher quality and increased yield. This leads to modification of existing and/or development of new memory test, fault detection, localization and classification flows that are being implemented in various software post-silicon analysis automation tools. In this paper, an approach for verification of those tools is proposed.

  • automotive.

  • built-in self-test

  • in-field test

  • memory test

Periodic testing of embedded memory devices in modern system-on-chips (SoC) is becoming an increasingly common requirement. Automotive is one of the largest semiconductor markets with the requirement of in-filed testing of embedded memories. Hardware implementation of test algorithms in memory built-in self-test (BIST) scheme allows in-field testing only with predefined instructions which restricts flexibility of system test in mission mode. In this paper, different scenarios for memory testing in mission mode is proposed, which are controlled and configured by microcontrollers Safety Manager.

  • analytical model

  • complementary metal-oxide-semiconductor (CMOS)

  • linear energy transfer (LET)

  • propagation delay

  • radiation effect.

  • single event transients (SET)

  • single event upsets (SEU)

  • soft errors

  • Technology Computer-Aided Design (TCAD)

This paper proposes a model for calculating the propagation delay of digital elements taking into account radiation-induced single event transients (SET). The main idea of this work is to determine the propagation delay of digital elements in integrated circuits (IC) without running the circuit level simulation. Analytical equations are derived to calculate the propagation delay of logic gates. The propagation delay of NAND gates chain is evaluated with proposed analytical formulas and with HSPICE simulation. The comparison of the evaluation results between HSPICE simulation and the model shows that the created analytical model forecasts the propagation delay of digital elements with a 90.3% of accuracy. This model can be integrated into the design process of radiation hardened ICs.

  • дифференциальные преобразования

  • дифференциальный аналог

  • метод А.Н. Крылова

  • модельный пример.

  • однопараметрические матрицы

  • полная проблема собственных значений-функций

A differential analogue of the A.N. Krylov method of for solving the complete eigenvalue problem - functions of one-parameter matrices is proposed. A necessary and sufficient condition for the unique solvability of the problem is obtained. A solution of one model example is considered, which demonstrates the computational efficiency of the proposed differential analogue.

  • дюкер

  • продолжительность опорожнения

  • участки различного уклона

  • эксперимент

In the hydraulic laboratory of the Institute of Water Problems and Hydraulic Engineering after Academician J.V. Eghiazarov, an experimental plant of siphon is installed one twig of which is vertical and the other has a small gradient to the horizon. The twigs of the siphon are made of a transparent silicon pipe permiting to observe the physics of emptying of the siphon, and to define the duration of emptying. The comparison of the experimental data with the results of calculation by the given formula is carried out.

Council

Editor-in-Chief: Melikyan V.Sh., Corr.member of NAS RA, Sci.Dr., Prof., Armenia Deputy Editor-in-Chief: Grigoryan A.Kh., Sci.Dr., Prof., Armenia Executive Secretary: Seyranyan Zh.S., Armenia Editorial Board: Aghbalyan S.G., Sci.Dr., Prof., Armenia Aslanyan L.H., Corr.member of NAS RA, Sci.Dr., Prof., Armenia Badalyan N.P., Sci.Dr., Prof.,, Russia Baghdasaryan H.V., Sci.Dr., Prof.,, Armenia Baghdasaryan M.Q., Sci.Dr., Prof.,, Armenia Chang F., Member of National Academy of Taiwan, Sci.Dr., Taiwan Chaplygin Yu.A., Academician of RAS, Sci.Dr., Prof., Russia Courtois B., Ph.D., France Davtyan S.P., Corr.member of NAS RA, Sci.Dr., Prof., Armenia Dokic B., Sci.Dr., Bosnia and Herzegovina Gagarinski A.Yu. , Sci.Dr., Prof., Russia Ghoneima M., Ph.Dr., Egypt Ghulyan A.G., Academician of NAS RA, Sci.Dr., Prof., Armenia Grimblatt V., Ph.Dr., Chile Hahanov V.I., Academician of Academy of Sciences of Ukraine in Applied Radioelectronics, Sci.Dr., Prof., Ukraine Hakhumyan A.A., Corr.member of NAS RA, Sci.Dr., Prof., Armenia Hakobyan V.N., Sci.Dr., Armenia Ilyushenko A.F., Corr.member of NAS of Belarus, Sci.Dr., Prof.,Belarus Karayan H.S., Corr.member of NAS RA, Sci.Dr., Prof., Armenia Krasnikov G.Y., Academician of RAS, Sci.Dr., Prof., Russia Kuchukyan A.T., Academician of NAS RA, Sci.Dr., Prof., Armenia Lan Ch., Ph.Dr., China Mandalika S., Ph.Dr., India Marukhyan V.Z., Ph.Dr., Prof., Armenia Mikhalevich A.A., Academician of NAS of Belarus, Sci.Dr., Prof., Belarus Petrosyan O.H., Sci.Dr., Prof., Armenia Petrosyants K.O., Sci.Dr., Prof., Russia Sapatnekar S., Ph.Dr., USA Sargsyan Yu.L., Academician of NAS RA, Sci.Dr., Prof., Armenia Sbitnev S.A., Sci.Dr., Prof., Russia Schlichtmann U., Ph.Dr., Germany Simonyan S.H., Sci.Dr., Prof., Armenia Stempkovski A.L., Academician of RAS, Sci.Dr., Prof., Russia Tikhomirov G.V., Sci.Dr., Prof., Russia Tsanova S., Sci.Dr., Bulgaria Ubar R., Academician of Academy of Sciences of Estonia, Sci.Dr., Prof., Estonia Usanov V.I., Sci.Dr., Prof.,Russia Vorobyov A.Y., Sci.Dr., Prof.,Russia Zorian Y., Ph.Dr., USA