Autor: Kuznetsov, V. - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Recent developments in Qucs-s Equation-Defined modelling of semiconductor devices and IC’s
Autorzy:: Brinson, M.
Kuznetsov, V.
Tematy:: Qucs
Qucs-S
Ngspice
XSPICE Code Models
compact semiconductor device modelling
Equation-Defined Devices
EDD
macromodels
XSPICE Code Model
makromodele; Pokaż więcej
Wydawca:: Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
Powiązania:: https://bibliotekanauki.pl/articles/397783.pdf Link otwiera się w nowym oknie
Opis:: The Qucs Equation-Defined Device was introduce roughly ten years ago as a versatile behavioural simulation component for modelling the non-linear static and dynamic properties of passive components, semiconductor devices and IC macromodels. Today, this component has become an established element for building experimental device simulation models. It’s inherent interactive properties make it ideal for device and circuit modelling via Qucs schematics. Moreover, Equation-Defined Devices often promote a clearer understanding of the factors involved in the construction of complex compact semiconductor simulation models. This paper is concerned with recent advances in Qucs-S/Ngspice/XSPICE modelling capabilities that improve model construction and simulation run time performance of Equation-Defined Devices using XSPICE model syntheses. To illustrate the new Qucs-S modelling techniques an XSPICE version of the EPFL EKV v2.6 long channel transistor model together with other illustrative examples are described and their performance simulated with Qucs-S and Ngspice.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Current conveyor equation-defined macromodels for wideband RF circuit design
Autorzy:: Brinson, M.
Kuznetsov, V.
Tematy:: Qucs
current conveyors
compact semiconductor device modelling
equation-defined devices
macromodels
Verilog-A module synthesis
konwejer prądowy
modelowanie urządzeń półprzewodnikowych
makromodele; Pokaż więcej
Wydawca:: Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
Powiązania:: https://bibliotekanauki.pl/articles/397845.pdf Link otwiera się w nowym oknie
Opis:: A high percentage of analogue integrated circuit designs use voltage domain signal processing techniques. Given the fact that integrated circuit current conveyors are high bandwidth current processing devices, often with superior RF performance compared to comparable voltage domain devices, it is surprising that the number of current mode integrated circuits available, as standard of-the-shelf industrial items, is so small. This paper introduces equation-defined device and Verilog-A synthesis approaches to the macromodelling of current conveyor integrated circuits. To illustrate the proposed modelling techniques the properties of a number of modular behavioural level current conveyor macromodel cells are described and their performance compared. The material presented is intended for analogue device modellers and circuit designers who wish to simulate large signal current domain integrated circuit designs. It also demonstrates how synthesized Verilog-A modules can be derived from equation-defined device and conventional subcircuits to form functional, computationally efficient current conveyor macromodels. To illustrate the application of behavioural current conveyor macromodels the design of a six cell CCII+ instrumentation amplifier is introduced and its performance discussed.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Qucs equation-defined and Verilog-A higher order behavioral device models for harmonic balance circuit simulation
Autorzy:: Brinson, M.
Kuznetsov, V.
Tematy:: Qucs
Xyce
Harmonic Balance RF simulation
compact semiconductor device modelling
equation-defined devices
macromodel
modelowanie urządzeń elektronicznych
makromodele; Pokaż więcej
Wydawca:: Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
Powiązania:: https://bibliotekanauki.pl/articles/397905.pdf Link otwiera się w nowym oknie
Opis:: This paper is concerned with the development and evaluation of a number of modeling techniques which improve Qucs Harmonic Balance simulation performance of RF compact device models. Although Qucs supports conventional SPICE semiconductor device models, whose static current/voltage and dynamic charge characteristics exhibit second and higher order derivatives may not be continuous, there is no guarantee that these will function without Harmonic Balance simulation convergence problems. The same comment also applies to a number of legacy compact semiconductor device models. The modeling of semiconductor devices centered on non-linear Equation-Defined Devices and blocks of Verilog-A code, combined with linear components, is introduced. These form a class of compact macromodel that has improved Harmonic Balance simulation performance. To illustrate the presented modeling techniques RF diode, BJT and MESFET macromodels are described and their Harmonic Balance performance simulated with Qucs and Xyce©.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Prace IPPT IFTR Reports ; 2/2008
Formulation of the Initial Invariant-Based Shell Finite Element Model Using the Plane Curve Geometry
Autorzy:: Kuznetsov, V.
Levyakov, S.
Współwytwórcy:: Kowalczyk, Piotr Marian. Red.
Kotulski, Zbigniew (1955– ). Red.
Sosnowski, Włodzimierz. Red.
Wydawca:: Instytut Podstawowych Problemów Techniki Polskiej Akademii Nauk
Powiązania:: Prace IPPT IFTR REPORTS
Opis:: Proceedings of the 36th Solid Mechanics Conference, Gdańsk, Poland, September 9-12, 2008
Rozszerzone streszczenia wykładów konferencyjnych
350-351 s.
Extended Abstracts of Conference Lectures
Dostawca treści:: RCIN - Repozytorium Cyfrowe Instytutów Naukowych

Książka

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Skocz do pozycji: 5.

Tytuł:: The Assessment of Alumina Production Waste Impact on Natural Water
Autorzy:: Kuznetsov, V. S.
Suprun, I. K.
Tematy:: alumina
red mud
utilisation
sludge dump; Pokaż więcej
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Powiązania:: https://bibliotekanauki.pl/articles/123535.pdf Link otwiera się w nowym oknie
Opis:: The paper is dedicated to the issue of assessment of alumina (red mud) production waste on natural water. The growth of the number of aluminium-producing facilities leads to the expansion of exclusion areas to store the production waste – sludge dumps. A considerable part of research on red mud utilisation is focused on its use in the iron-and-steel industry. Furthermore, the technologies of red mud usage in the construction industry gain substantial significance for land reclamation, isolation of polluted industrial and agricultural lands as well as the effluent and industrial emissions treatment.
Dostawca treści:: Biblioteka Nauki

Artykuł

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Skocz do pozycji: 6.

Tytuł:: Reduction of an Adverse Impact During Well Drilling by Means of Drilling Waste Usage
Autorzy:: Kuznetsov, V. S.
Suprun, I. K.
Tematy:: bore mud
utilisation
toxicity
well site
sludge pit
dehumidification
oil production
refining
expression
waste treatment; Pokaż więcej
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Powiązania:: https://bibliotekanauki.pl/articles/125400.pdf Link otwiera się w nowym oknie
Opis:: The problem of drilling waste utilisation is assumed to be resolved through the implementation of the complex of environment protection measures in production engineering. They include primarily the use in the process of well drilling of drilling mud on the basis of water-soluble biodegradable polymers and a four-stage drilling mud refining system. Secondly, the usage of the well site construction with trenching for allocation of expressed bore mud and a temporary ground tank for drilling waste water.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: The method for increasing the efficiency of equipment’s maintenance in railway traction power supply systems
Autorzy:: Matusevych, O.
Kuznetsov, V.
Sychenko, V.
Tematy:: railway traction
power systems
efficiency
maintenance equipments
traction substation
trakcja kolejowa
systemy zasilania
wydajność
konserwacja urządzeń; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/223664.pdf Link otwiera się w nowym oknie
Opis:: Purpose. To develop the method for increasing the efficiency of the equipment’s maintenance and repair system, ensuring necessary level of operational reliability of the equipment, safety and reliability of the electric equipment with minimal expenses on operation. Relevance. Aging of the power equipment in railway power supply systems sharply raised a need for assessment of its states and degree of risk for operation outside rated service life. In critical conditions of technological processes and operational modes of the railways it is necessary to increase the equipment’s operational reliability. The scheduled maintenance and repair system whose main technical and economic criterion is the minimum of equipment’s downtimes on the basis of a rigid regulation of repair cycles, in the conditions of market regulations in the field of repair in many cases does not provide the optimal decisions due to insufficient financing. The solution of this problem is possible by improvement of the maintenance and repair system. Under these conditions the main direction for supporting the operational reliability of power electric equipment on TS is a development of the modern methods based on individual supervision over real changes of technical condition of power equipment. Scientific novelty. In this article the authors proposed an integrated approach, on the basis of which can be developed the effective maintenance and repair system for traction power supply systems. Proposed approach allowed to react quickly to changes of service conditions on traction substations, to control the technical condition of power electric equipment under the conditions of uncertainty, to establish interrelation between quality of service and operational reliability of the equipment, to choose a service strategy on traction substations. Practical importance. The validity of the developed method was confirmed by the results of calculations and practically by choosing the optimal maintenance's option for transformer TDTN-25000/150-70 U1 (ТДТН-25000/150-70 У1) on traction power supply substation.
Dostawca treści:: Biblioteka Nauki

Artykuł

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Skocz do pozycji: 8.

Tytuł:: Assessing the Environmental Condition of Minor Rivers in Urban Areas
Autorzy:: Kuznetsov, V. S.
Petrov, D.S.
Tematy:: sediment pollution
minor rivers
oil product pollution
environmental monitoring
heavy metal pollution; Pokaż więcej
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Powiązania:: https://bibliotekanauki.pl/articles/124132.pdf Link otwiera się w nowym oknie
Opis:: This article is devoted to the study of water and sediment pollution in the channel of the Neva delta. Spectrophotometry was used to determine the concentration of pollutants in water. In the chemical analysis of the precipitate, atomic absorption spectroscopy and infrared spectroscopy were used. Analysis of the hydrochemical composition and sediment of the Smolenka River showed high concentrations of heavy metals and petroleum products. At the same time, the hydrochemical composition of the Smolenka River is highly unstable, but the concentration of oil products and lead in the sediments indicates the presence of local pollution sources. Based on our findings, we are guided by the restoration of the aquatic environment.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Distribution of Excess Regenerative Energy in Electric Transport Systems on the Basis of Fuzzy Logic Application
Autorzy:: Sablin, O.
Kuznetsov, V.
Shinkarenko, V.
Ivanov, A.
Tematy:: electric transport
regeneration of the electric power
stores
inverters
regulation of voltage
traction
external power supply
fuzzy logic
transport elektryczny
regeneracja energii elektrycznej
magazyny
falowniki
regulacja napięcia
trakcja
zasilanie zewnętrzne
logika rozmyta; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/223524.pdf Link otwiera się w nowym oknie
Opis:: Purpose. To develop the fuzzy model of distribution of excess regenerative energy in traction and external power supply systems allowing to exercise effective operation of the power equipment. Relevance. For effective distribution of excess regenerative energy in systems of electric transport, as well as for systems equipped with stationary stores of energy and inverting traction substations with regulators of output voltage it is necessary to solve a number of the problems with high degree of uncertainty demanding taking into account a set of random factors such as the modes of power lines and traction loadings. These factors have to be considered in operation for choosing the rational modes of energy stores, inverters and regulators of voltage on buses of substations to provide the rational conditions for energy regeneration on electric transport. Scientific novelty. The control system of energy storage devices, inverters and traction substation output voltage regulators, designed on the basis of fuzzy logic, can provide the necessary conditions for the regeneration on electric transport on sections with a shortage of traction power consumption and allows to optimize the distribution of excess braking energy of transport vehicles. It is achieved by determining the rational relationship between the components of the excess current of regeneration in real time, which can ensure a minimum of power losses of regenerative energy in traction and external power supply systems. Practical importance. The use of the developed approach is effective under the conditions of incomplete information received by measurement systems and on the basis of additional studies it can allow to minimize rated capacity of stores, inverters and traction substation output voltage regulators that could reduce the costs of modernization of existing sections and electrification of new electric transport systems.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Improvement of the regenerating energy accounting system on the direct current railways
Autorzy:: Kuznetsov, V. G.
Sablin, O. I.
Chornaya, A. V.
Tematy:: energy accounting system
power consumption
power supply
traffic size
regeneration
system rozliczeniowy energii
pobór mocy
zasilanie
wielkość ruchu
regeneracja; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/224043.pdf Link otwiera się w nowym oknie
Opis:: Purpose. Monitoring of current state of quantitative indices of regenerative energy in the suburban movement, the analysis of the factors influencing its volumes and improvement the principles of the train regenerative energy accounting on the basis of it. Relevance. Development of effective measures of increase the regeneration efficiency of the electric power in system of electric traction demands comprehensive completeness of information on quantitative indices of regeneration energy volumes at all possible levels of its analysis, in particular on the corresponding sections of RS movement that will allow to establish the influence on the level of regeneration of various factors, such as parameters of traction power supply and the organization of train service. As the existing system of the regenerative energy accounting does not allow to consider the specified factors, development of the principles for increasing the efficiency of the analysis of volumes of return energy to a contact line during regenerative braking on DC rolling stock is the actual direction of researches. Collective monitoring of regeneration energy volumes by specialists of locomotive service, power supply and traffic operating departments will be essentially new approach to definition of real factors and taking effective decisions for increasing of using of regenerative energy. Scientific novelty. It’s offered to consider the influence on quantitative indices of regenerative energy the parameters of traction power supply and the organization (sizes) of traffic service on sections. Practical importance. Increasing the efficiency of the regeneration energy accounting is an important element in drawing up the balance of energy for electric traction system, development of the effective methods for improvement of the conditions of regeneration in it and in estimation of its power indicators in general.
Dostawca treści:: Biblioteka Nauki

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