Vardan Mkrttchian | Astrakhan State University (original) (raw)

Uploads

Papers by Vardan Mkrttchian

УДК 378.1 М.Ю. Катаев, А.М. Кориков, В.С. Мкртчян

Meta-communication for reflective online conversations: models for distance education / Ugur Demi... more Meta-communication for reflective online conversations: models for distance education / Ugur Demiray, Gulsun Kurubacak, and T. Volkan Yuzer, editors.

Project management approaches for online learning design / Gulsun Eby and T. Volkan Yuzer, editors.

The top-down implementation of information and communication technology does not guarantee necess... more The top-down implementation of information and communication technology does not guarantee necessary organizational change in e-learning and virtual enterprises. The delivery of online instructional courses in higher education institutions is flourishing, as students and educators in general recognize the advantages of the new technology. Problems and concerns regarding online education are touched on in various articles and papers but limited research has been conducted to examine in depth the technical and social problems that accompany this new technology. This study examines these problems and concerns regarding online distance education and virtual enterprises in online universities; The All Armenian Internet University is used as an example. Hopefully, the information that is provided here will update decision-makers of the current needs and concerns of online students and instructors so that an effective distance-learning program can be fostered. The paper discusses and introduces organizational learning processes in individual enterprises and networks in order to prepare for virtual enterprises and to establish a continuing improvement of work and learning processes to stabilize networks as the basis for the enterprises of the the All Armenian Internet University. The first steps, when using the developed learning loops with the management and the workforce of a virtual enterprise to prepare for networking, are presented.

In this paper, a combination of neural network with sliding mode control (SMC) is proposed. As a ... more In this paper, a combination of neural network with sliding mode control (SMC) is proposed. As a result, the chattering is eliminated and error performance of SMC is improved. In such an approach two parallel neural networks (NNs) are proposed to realize the SMC. The equivalent control and the corrective control term of SMC are the outputs of the NNs. The training algorithms applied to NNs are based on the SMC equation with a gradient descent method to minimize the control and chattering while optimizing the error performance. In this paper, a sliding mode neurocontroller in power systems is proposed, and experimental results are presented. Two parallel NNs are used to realize the neuro-SMC. To increase the first neural network structure flexibility hidden layer neuron pruning and node splitting algorithms are considered

Modeling packaged electronic elements is encumbered by parasitic effects and discontinuities caus... more Modeling packaged electronic elements is encumbered by parasitic effects and discontinuities causing enlarged parameters and is done using numerical field simulation in reference to result of on-wafer measurements and calculated emitter inductance. Package simulation has revealed certain problems with discontinuities and disruption of automatic adjustment that can be eliminated using the sliding mode characterized by reduced order of mathematical support and feedback from discontinuities. Analysis of bipolar transistor models show inadequacies of currently accepted concepts of dynamic systems, with high factors of uncertainty due to unambiguous solutions. RF measurements of prospective transistors can be done using wafer measuring techniques. The smooth RF characteristics of the interior transistor as well a limited number of parameters yield a mode with good agreement for both DC- and RF characteristics. It is our purpose to achieve a model suitable for use with all types of circuit simulations. The ports for chip connection are concentrated or internal ports defined by voltage and current. The resulting S-parameters of the ports are used to extract equivalent circuit elements leading to well define values with physical sense. The essential components of the packaging model are the sliding mode indicator, observer and the anticipatory device.

While analyzing on the logical level of the digital schemes taking into consideration the externa... more While analyzing on the logical level of the digital schemes taking into consideration the external effects, each unit of the scheme is characterized by the variable Q, the value of which points not to the stationary condition of the unit 0 or 1, but to the degree of difference between the state of the given unit and the stationary condition f the value of an external effect. The state of the given unit are input besides the usual variables in to the logical function of each element. These dependencies are different models for determining the external effects. The system of analysis of programs must be open with respect to models type for determining the external effects. The approach described above has been realized in the system of modeling programs of digital integral schemes in sliding mode and the experiments carried out allow as to state that this strategy increases the functioning speed for more than 10 orders while the loss of accuracy is 1-5 percent.

The proposed non-traditional method of theoretical investigation is free from the above-mentioned... more The proposed non-traditional method of theoretical investigation is free from the above-mentioned drawbacks. It is based on the fact, that a solution of the wave equation in a modulated media is searched in the form of a single expression, but not in the form of generally accepted counter-propagating waves.

УДК 378.1 М.Ю. Катаев, А.М. Кориков, В.С. Мкртчян

Project management approaches for online learning design / Gulsun Eby and T. Volkan Yuzer, editors.