Search results for: DIFFERENTIAL PULSE VOLTAMMETRY

• Measurement data of cyclic voltammetry and electrochemical impedance measurements of carbon samples synthesized on axes and off axes

  Open Research Data

  open access

  • P. Jakóbczyk
  • M. Pierpaoli

  The electrochemical performance of the multielectrode samples were investigated by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) using a VMP-300 BioLogic galvanostat potentiostat (France) under the EC-lab software. All electrochemical investigations were carried out in a three-electrode cell system. The carbon multi-electrode,...

• Suppression of Supply Current Harmonics of 18-Pulse Diode Rectifier by Series Active Power Filter with LC Coupling

  Publication

  • W. Śleszyński
  • A. Cichowski
  • P. Mysiak

  - ENERGIES - Year 2020

  The reported research aims at improving the quality of three-phase rectifier supply currents. An effective method consists of adding properly formed booster voltages to the fundamental supply voltages using a series active filter. In the proposed solution, the booster voltages are generated by three single-phase systems consisting of inverters, LC filters, and single-phase transformers. The application of LC couplings ensures low...

  Full text available to download

• Explicit and implicit difefrence methods for quasilinear first order partial functional differential equations.

  Publication

  • Z. Kamont
  • A. Szafrańska

  - Computational Methods in Applied Mathematics - Year 2014

  Initial boundary value problems of the Dirichlet type for quasilinear functional differential equations are considered. Explicit difference schemes of the Euler type and implicit difference methods are investigated. Suffcient conditions for the convergence of approximate solutions are given and comparisons of the methods are presented. It is proved that assumptions on the regularity of given functions are the same for both classes...

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• Successive Iterative Method for Higher-Order Fractional Differential Equations Involving Stieltjes Integral Boundary Conditions

  Publication

  • T. Jankowski

  - TASK Quarterly - Year 2016

  In this paper, the existence of positive solutions to fractional differential equations with delayed arguments and Stieltjes integral boundary conditions is discussed. The convergence of successive iterative method of solving such problems is investigated. This allows us to improve some recent works. Some numerical examples illustrate the results.

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• Physics-guided neural networks (PGNNs) to solve differential equations for spatial analysis

  Publication

  • B. Borzyszkowski
  • K. Damaszke
  • J. Romankiewicz
  • M. Świniarski
  • M. Moszyński

  - Bulletin of the Polish Academy of Sciences-Technical Sciences - Year 2021

  Numerous examples of physically unjustified neural networks, despite satisfactory performance, generate contradictions with logic and lead to many inaccuracies in the final applications. One of the methods to justify the typical black-box model already at the training stage and lead to many inaccuracies in the final applications. One of the methods to justify the typical black-box model already at the training stage involves extending...

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• Fractional differential equations with deviating arguments

  Publication

  • T. Jankowski

  - DYNAMIC SYSTEMS AND APPLICATIONS - Year 2008

  Dla równań różniczkowych typu ułamkowego, zostały podane warunki dostateczne na istnienie jednego rozwiązania lub rozwiazań ekstremalnych. Nierówności różniczkowe są też doskutowane.

• Approximate methods for functional differential equations

  Publication

  • Z. Bartoszewski

  - Year 2009

  W pracy przedstawione są dwie klasy przybliżonych metod rozwiązywania równań różniczkowo funkcyjnych ze szczególnym uwzględnieniem równań różniczkowych z opóźnieniem. Do pierwszej klasy należą metody bezpośrednie reprezentowane w przedkładanej rozprawie przez dwukrokowe metody Rungego-Kutty. Należą one do klasy ogólnych metod liniowych rozwiązywania równań różniczkowych. Druga klasę przybliżonych metod rozwiązywania równań różniczkowo...

• Recurrence and differential relations for sphericial spinors

  Publication

  • R. Szmytkowski

  - JOURNAL OF MATHEMATICAL CHEMISTRY - Year 2007

  Praca zawiera zestawienie kilkudziesięciu relacji rekurencyjnych i różniczkiowych, spełnianych przez spinory sferyczne (harmoniki sferyczne dla spinu 1/2).

• On delay differential equations with boundary conditions

  Publication

  • T. Jankowski

  - DYNAMIC SYSTEMS AND APPLICATIONS - Year 2007

  Podano warunki na istnienie rozwiązania zagadnienia brzegowego typu opóźnionego, zakładając pewne warunki monotoniczności funkcji występującej po prawej stronie naszego zagadnienia. Pokazano, że dwa ciągi monotoniczne są zbieżne do rozwiązania dokładnego.

• Ordinary differential equations with deviated arguments

  Publication

  • T. Jankowski

  - Year 2007

  Praca dotyczy istnienia i przybliżonych rozwiązań dla problemów brzegowych z opóźnionymi oraz wyprzedzonymi argumentami. Dyskutowano też pewne nierówności różniczkowe powyższego typu.

• Dimension of the solution set for differential inclusions

  Publication

  • Z. Dzedzej
  • B. Gelman

  - Demonstratio Mathematica - Year 1993

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• On integro-differential equations with delayed arguments

  Publication

  • T. Jankowski
  • R. Jankowski

  - Dynamics of Continuous, Discrete and Impulsive Systems Series A: Mathematical Analysis - Year 2006

  Praca dotyczy problemów różniczkowo-całkowych z warunkami początkowymi oraz brzegowymi typu okresowego. Podano warunki na istnienie i jednoznaczność rozwiązania. Badania dotyczyły również nierówności różniczkowo-całkowych z argumentami typu opóżnionego. Podano przykłady, które mogą mieć zastosowanie w problemach inżynierskich.

• A comparison method for ordinary differential systems

  Publication

  • T. Jankowski

  - ACTA MATHEMATICA HUNGARICA - Year 2003

  Praca dotyczy problemów istnienia i jednoznaczności rozwiązań oraz ciągłej zależności dla układów równań różniczkowych w tym i z opóźnionymi argumentami z warunkami początkowymi oraz brzegowymi typu okresowego. Przy odpowiednich założeniach, stosując teorię nierówności różniczkowych, pokazano, że odpowiednia funkcja porównawcza może być ujemna, co ma istotne znaczenie w dalszych badaniach. Pokazano, że konstruowany ciąg iteracji...

• Functional differential equations of second order.

  Publication

  • T. Jankowski

  - BULLETIN OF THE BELGIAN MATHEMATICAL SOCIETY-SIMON STEVIN - Year 2003

  Praca dotyczy problemu brzegowego dla równań różniczkowo-funkcyjnych 2-go rzędu. Stosując metodę kwasilinearyzacji pokazano, że odpowiednio skonstruowane ciągi monotoniczne są zbieżne do jedynego rozwiązania danego problemu i ustalono szybkość tej zbieżności. Pokazano również pewną relację pomiędzy rozwiązaniami odpowiednich liniowych równań różniczkowo-funkcyjnych z warunkami brzegowymi.

• Systems of differential equations with a singular matrix

  Publication

  • T. Jankowski

  - Communications in Applied Analysis - Year 2002

  Praca dotyczy układów równań różniczkowych z macierzą osobliwą. Szczególnymi przypadkami takich układów są równania różniczkowo-algebraiczne. Korzystając z odpowiedniej nierówności różniczkowej dla układów równań i metody quasi linearyzacji pokazano, iż odpowiednie monotoniczne ciągi są zbieżne do rozwiązania naszego problemu i jest to zbieżność kwadratowa. O funkcji f występującej po prawej stronie zagadnienia zakładano...

• Differential inequalities with initial time difference.

  Publication

  • T. Jankowski

  - Journal of Applied Analysis - Year 2002

  Uzyskano pewne wyniki porównawcze pomiędzy rozwiązaniami nierówności różniczkowych startujących z różnych punktów początkowych. O nieliniowej funkcji f (związanej z zagadnieniem) zakładano jednostronny warunek Lipschitza. Podano pewne zastosowanie otrzymanych wyników. Sformułowano też pewne warunki dotyczące stabilności.

• Differential equations with integral boundary conditions

  Publication

  • T. Jankowski

  - JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS - Year 2002

  Stosuje się metodę iteracji monotonicznych opartą na dolnym i górnym rozwiązaniu. Przy jednostronnym warunku Lipschitza uzyskano pewne wyniki dotyczące rozwiązań zwyczajnych równań różniczkowych z całkowym warunkiem brzegowym. Sformułowano warunki dostateczne na istnienie jedynego rozwiązania (lub rozwiązań ekstremalnych) w pewnym segmencie. Podano przykłady ilustrujące przyjęte założenia.

• THE PULSE DESCRIPTORS IN SENSITIVITY STUDIES OF HYBRID SORPTION COLUMN TRANSPORT MODELS

  Publication

  • M. Okońska
  • M. Kaczmarek
  • M. Marciniak

  - JOURNAL OF POROUS MEDIA - Year 2019

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• Exact generation of voltage vector in voltage inverter with pulse width modulation

  Publication

  • A. Lewicki
  • Z. Krzemiński
  • B. Zosiuk

  - International Review of Electrical Engineering-IREE - Year 2006

  W artykule zaproponowano metodę modulacji szerokości impulsów dla falownika napięcia. Proponowana metoda rozwiązuje problemy związane z kompensacją czasów martwych oraz kompensacją wpływu parametrów łączników energolelektronicznych na napięcie wjściowe falownika. W artykule zaprezentowano metodę kompensacji między innymi pojemności pasożytniczych tranzystorów, dyskretyzacji czasów załączeń tranzystorów. Przedstawiona metoda modulacji...

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• IEEE 802.15.4a Impulse Radio Spectrum Shaping by Changes in Pulse Sequence

  Publication

  • R. Katulski
  • J. Sadowski

  - Year 2009

  This paper presents one of possible techniques of IEEE 802.15.4a ultra-wideband signal spectrum control, based on changes in sequences of transmitted pulses with very short duration time. This technique can reduce probability of mutual interferences between new ultra-wideband and existing narrowband devices, which may be helpful in further studies on allowing UWB transmission in wider range of spectrum in theEuropean Union.

• Bearing current path and pulse rate in PWM-inverter-fed induction

  Publication

  • A. Kempski
  • R. Strzelecki
  • R. Smolenski
  • Z. Fedyczak

  - Year 2001

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• A simulation investigation into the signal reconstruction accuracy of the transducer with pulse frequency output

  Publication

  • E. Pawlowski

  - Year 2016

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• A method of self-testing of analog circuits based on fully differential op-amps with theTCBF classifier

  Publication

  • Z. Czaja
  • M. Kowalewski

  - Year 2015

  A new approach of self-testing of analog circuits based on fully differential op-amps of mixed-signal systems controlled by microcontrollers is presented. It consists of a measurement procedure and a fault diagnosis procedure. We measure voltage samples of a time response of a tested circuit on a stimulation of a unit step function given at the common-mode reference voltage input of the op-amp. The fault detection and fault localization...

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• Performance of the Direct Sequence Spread Spectrum Underwater Acoustic Communication System with Differential Detection in Strong Multipath Propagation Conditions

  Publication

  • J. Schmidt
  • I. Kochańska
  • A. Schmidt

  - Archives of Acoustics - Year 2024

  The underwater acoustic communication (UAC) operating in very shallow-water should ensure reliable transmission in conditions of strong multipath propagation, significantly disturbing the received signal. One of the techniques to achieve this goal is the direct sequence spread spectrum (DSSS) technique, which consists in binary phase shift keying (BPSK) according to a pseudo-random spreading sequence. This paper describes the DSSS...

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• Multi-criteria Differential Evolution for Optimization of Virtual Machine Resources in Smart City Cloud

  Publication

  • J. Balicki
  • H. Balicka
  • P. Dryja
  • M. Tyszka

  - Year 2020

  In a smart city, artificial intelligence tools support citizens and urban services. From the user point of view, smart applications should bring computing to the edge of the cloud, closer to citizens with short latency. However, from the cloud designer point of view, the trade-off between cost, energy and time criteria requires the Pareto solutions. Therefore, the proposed multi-criteria differential evolution can optimize virtual...

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• Using differential pressure sensor to measure nitrous oxide level in a tank

  Publication

  • M. Czapski
  • W. Lachowski
  • N. Balogh
  • W. Deszczyński
  • K. Hucik
  • W. Sieklicki

  - Year 2022

  A method for measuring the level of liquid nitrous oxide oxidizer in a hybrid rocket motor oxidizer tank is proposed. Presented approach is more accurate than the most commonly used method of this measurement, which employs weighting of the whole sounding rocket or an oxidizer tank. In our solution we use a differential pressure sensor to measure the change of pressure at the bottom of an oxidizer tank in comparison to the pressure...

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• DIFFERENTIAL GEOMETRY AND ITS APPLICATIONS

  Journals

  ISSN: 0926-2245 , eISSN: 1872-6984

• COMMUNICATIONS IN PARTIAL DIFFERENTIAL EQUATIONS

  Journals

  ISSN: 0360-5302 , eISSN: 1532-4133

• Computational Methods for Differential Equations

  Journals

  ISSN: 2345-3982 , eISSN: 2383-2533

• Journal of Partial Differential Equations

  Journals

  ISSN: 2079-732X , eISSN: 1000-940X

• International Journal of Differential Equations

  Journals

  ISSN: 1687-9643 , eISSN: 1687-9651

• Differential Equations and Dynamical Systems

  Journals

  ISSN: 0971-3514 , eISSN: 0974-6870

• Dynamics of Partial Differential Equations

  Journals

  ISSN: 1548-159X

• Partial Differential Equations and Applications

  Journals

  ISSN: 2662-2963 , eISSN: 2662-2971

• Journal of Hyperbolic Differential Equations

  Journals

  ISSN: 0219-8916 , eISSN: 1793-6993

• PULSE and ECG measurement from the hand with elbows to the body - Man 29 age

  Open Research Data

  open access

  • K. Osiński

  - series: PULSE and ECG measurement from the hand

  The data set presents the measurements of the pulse and the ECG signal from the hand made with the use of a proprietary measuring system based on the AD8232 chip, a set of green diode and a phototransistor made on the STM32 microcontroller. Thanks to such a constructed device, it is possible to measure the ECG signal in a non-standard way - from the...

• PULSE and ECG measurement from the hand with elbows to the body - Woman 28 age

  Open Research Data

  open access

  • K. Osiński

  - series: PULSE and ECG measurement from the hand

  The data set presents the measurements of the pulse and the ECG signal from the hand made with the use of a proprietary measuring system based on the AD8232 chip, a set of green diode and a phototransistor made on the STM32 microcontroller. Thanks to such a constructed device, it is possible to measure the ECG signal in a non-standard way - from the...

• PULSE and ECG measurement from the hand with elbows in the air - Woman 28 age

  Open Research Data

  open access

  • K. Osiński

  - series: PULSE and ECG measurement from the hand

  The data set presents the measurements of the pulse and the ECG signal from the hand made with the use of a proprietary measuring system based on the AD8232 chip, a set of green diode and a phototransistor made on the STM32 microcontroller. Thanks to such a constructed device, it is possible to measure the ECG signal in a non-standard way - from the...

• PULSE and ECG measurement from the hand with elbows in the air - Woman 27 age

  Open Research Data

  open access

  • K. Osiński

  - series: PULSE and ECG measurement from the hand

  The data set presents the measurements of the pulse and the ECG signal from the hand made with the use of a proprietary measuring system based on the AD8232 chip, a set of green diode and a phototransistor made on the STM32 microcontroller. Thanks to such a constructed device, it is possible to measure the ECG signal in a non-standard way - from the...

• PULSE and ECG measurement from the hand with elbows in the air - Man 29 age

  Open Research Data

  open access

  • K. Osiński

  - series: PULSE and ECG measurement from the hand

  The data set presents the measurements of the pulse and the ECG signal from the hand made with the use of a proprietary measuring system based on the AD8232 chip, a set of green diode and a phototransistor made on the STM32 microcontroller. Thanks to such a constructed device, it is possible to measure the ECG signal in a non-standard way - from the...

• PULSE and ECG measurement from the hand with elbows to the body - Woman 27 age

  Open Research Data

  open access

  • K. Osiński

  - series: PULSE and ECG measurement from the hand

  The data set presents the measurements of the pulse and the ECG signal from the hand made with the use of a proprietary measuring system based on the AD8232 chip, a set of green diode and a phototransistor made on the STM32 microcontroller. Thanks to such a constructed device, it is possible to measure the ECG signal in a non-standard way - from the...

• PULSE and ECG measurement from the hand with elbows to the body - Woman 24 age

  Open Research Data

  open access

  • K. Osiński

  - series: PULSE and ECG measurement from the hand

  The data set presents the measurements of the pulse and the ECG signal from the hand made with the use of a proprietary measuring system based on the AD8232 chip, a set of green diode and a phototransistor made on the STM32 microcontroller. Thanks to such a constructed device, it is possible to measure the ECG signal in a non-standard way - from the...

• PULSE and ECG measurement from the hand with elbows in the air - Man 53 age

  Open Research Data

  open access

  • K. Osiński

  - series: PULSE and ECG measurement from the hand

  The data set presents the measurements of the pulse and the ECG signal from the hand made with the use of a proprietary measuring system based on the AD8232 chip, a set of green diode and a phototransistor made on the STM32 microcontroller. Thanks to such a constructed device, it is possible to measure the ECG signal in a non-standard way - from the...

• PULSE and ECG measurement from the hand with elbows to the body - Woman 30 age

  Open Research Data

  open access

  • K. Osiński

  - series: PULSE and ECG measurement from the hand

  The data set presents the measurements of the pulse and the ECG signal from the hand made with the use of a proprietary measuring system based on the AD8232 chip, a set of green diode and a phototransistor made on the STM32 microcontroller. Thanks to such a constructed device, it is possible to measure the ECG signal in a non-standard way - from the...

• PULSE and ECG measurement from the hand with elbows to the body - Man 30 age

  Open Research Data

  open access

  • K. Osiński

  - series: PULSE and ECG measurement from the hand

  The data set presents the measurements of the pulse and the ECG signal from the hand made with the use of a proprietary measuring system based on the AD8232 chip, a set of green diode and a phototransistor made on the STM32 microcontroller. Thanks to such a constructed device, it is possible to measure the ECG signal in a non-standard way - from the...

• PULSE and ECG measurement from the hand with elbows to the body - Man 53 age

  Open Research Data

  open access

  • K. Osiński

  - series: PULSE and ECG measurement from the hand

  The data set presents the measurements of the pulse and the ECG signal from the hand made with the use of a proprietary measuring system based on the AD8232 chip, a set of green diode and a phototransistor made on the STM32 microcontroller. Thanks to such a constructed device, it is possible to measure the ECG signal in a non-standard way - from the...

• PULSE and ECG measurement from the hand with elbows in the air - Man 30 age

  Open Research Data

  open access

  • K. Osiński

  - series: PULSE and ECG measurement from the hand

  The data set presents the measurements of the pulse and the ECG signal from the hand made with the use of a proprietary measuring system based on the AD8232 chip, a set of green diode and a phototransistor made on the STM32 microcontroller. Thanks to such a constructed device, it is possible to measure the ECG signal in a non-standard way - from the...

• PULSE and ECG measurement from the hand with elbows in the air - Woman 24 age

  Open Research Data

  open access

  • K. Osiński

  - series: PULSE and ECG measurement from the hand

  The data set presents the measurements of the pulse and the ECG signal from the hand made with the use of a proprietary measuring system based on the AD8232 chip, a set of green diode and a phototransistor made on the STM32 microcontroller. Thanks to such a constructed device, it is possible to measure the ECG signal in a non-standard way - from the...

• PULSE and ECG measurement from the hand with elbows in the air - Woman 30 age

  Open Research Data

  open access

  • K. Osiński

  - series: PULSE and ECG measurement from the hand

  The data set presents the measurements of the pulse and the ECG signal from the hand made with the use of a proprietary measuring system based on the AD8232 chip, a set of green diode and a phototransistor made on the STM32 microcontroller. Thanks to such a constructed device, it is possible to measure the ECG signal in a non-standard way - from the...

• Multi-objective Tabu-based Differential Evolution for Teleportation of Smart Virtual Machines in Private Computing Clouds

  Publication

  • J. Balicki
  • P. Dryja

  - Year 2021

  We propose a multi-objective approach for using differential evolution algorithm with tabu search algorithm as an additional mutation for live migration (teleportation) of virtual machines. This issue is crucial in private computing clouds. Teleportation of virtual machines is supposed to be planned to determine Pareto-optimal solutions for several criteria such as workload of the bottleneck host, communication capacity of the...

  Full text to download in external service