Search results for "InP"
showing 10 items of 508 documents
Analytically solvable Hamiltonians for quantum two-level systems and their dynamics
2014
A simple systematic way of obtaining analytically solvable Hamiltonians for quantum two-level systems is presented. In this method, a time-dependent Hamiltonian and the resulting unitary evolution operator are connected through an arbitrary function of time, furnishing us with new analytically solvable cases. The method is surprisingly simple, direct, and transparent and is applicable to a wide class of two-level Hamiltonians with no involved constraint on the input function. A few examples illustrate how the method leads to simple solvable Hamiltonians and dynamics.
Depth profiling of Al2O3+ TiO2 nanolaminates by means of a time-of-flight energy spectromete
2011
Atomic layer deposition (ALD) is currently a widespread method to grow conformal thin films with a sub-nm thickness control. By using ALD for nanolaminate oxides, it is possible to fine tune the electrical, optical and mechanical properties of thin films. In this study the elemental depth profiles and surface roughnesses were determined for Al2O3 + TiO2 nanolaminates with nominal single-layer thicknesses of 1, 2, 5, 10 and 20 nm and total thickness between 40 nm and 60 nm. The depth profiles were measured by means of a time-of-flight elastic recoil detection analysis (ToF-ERDA) spectrometer recently installed at the University of Jyväskylä. In TOF-E measurements 63Cu, 35Cl, 12C and 4He ions…
Computer Structure Laboratory
2019
La asignatura "Estructura de Computadores" es una asignatura obligatoria de segundo curso del Grado en Ingeniería Multimedia y del Grado en Ingeniería Informática. Tiene asignada una dedicación de 6 ECTS, siendo de carácter obligatorio en los dos grados. El material desarrollado son un total de 8 sesiones de laboratorio de 2 horas y media cada una, donde se estudia: jerarquía de memoria, centrándose en la memoria cache (3 sesiones), entrada y salida (2 sesiones) y periféricos (3 sesiones). En las 5 primeras prácticas se utiliza un software (MipsIt) que simula una máquina MIPS. En las 3 últimas sesiones se utiliza una máquina virtual con Linux. Las prácticas parten de ejemplos ya preparados …
BIBO Stability Analysis for Delay Switched Systems with Nonlinear Perturbation
2013
Published version of a paper from the journal:Abstract and Applied Analysis. Also available from Hindawi:http://dx.doi.org/10.1155/2013/738653 The problem of bounded-input bounded-output ( BIBO) stability is investigated for a class of delay switched systems with mixed time-varying discrete and constant neutral delays and nonlinear perturbation. Based on the Lyapunov-Krasovskii functional theory, new BIBO stabilization criteria are established in terms of delay-dependent linear matrix inequalities. The numerical simulation is carried out to demonstrate the effectiveness of the results obtained in the paper.
Fuzzy Variable Structure Control for Uncertain Systems with Disturbance
2012
Published version of an article from the journal: Mathematical Problems in Engineering. Also available from the publisher:http://dx.doi.org/10.1155/2012/105074 This paper focuses on the fuzzy variable structure control for uncertain systems with disturbance. Specifically, the fuzzy control is introduced to estimate the control disturbance, the switching control is included to compensate for the approximation error, and they possess the characteristic of simpleness in design and effectiveness in attenuating the control chattering. Some typical numerical examples are presented to demonstrate the effectiveness and advantage of the fuzzy variable structure controller proposed.
Robust tool point control for offshore knuckle boom crane
2011
Author's version of a chapter in the book: Proceedings of the 18th IFAC World Congress 2011. Also available from the publisher at: http://dx.doi.org/10.3182/20110828-6-IT-1002.03004 This paper considers the design of an H∞ controller for tool point control of a hydraulically actuated knuckle boom crane. The paper describes the modelling of the crane's mechanical and hydraulic systems and a disturbance model. These are linearised and combined in a state-space model used for the controller design. The controller synthesis problem is to design (if possible) an admissible controller that solves the problem of robust regulation against step inputs with an H∞ constraint based on the internal mode…
Ventricular-vascular coupling in hypertension: methodological considerations and clinical implications.
2014
The present review is addressed to analyse the complex interplay between left ventricle and arterial tree in hypertension. The different methodological approaches to the analysis of ventricular vascular coupling in the time and frequency domain are discussed. Moreover, the role of hypertension-related changes of arterial structure and function (stiffness and wave reflection) on arterial load and how ventricular-vascular coupling modulates the process of left ventricular adaptation to hypertension are analysed.The different interplay between vascular bed and left ventricle emerges as the pathophysiological basis for the development of the multiple patterns of ventricular structural adaptatio…
IFRS-tilinpäätösraportoinnin erot Suomen ja Venäjän välillä
2017
Tutkimuksessa selvitetään, eroavatko suomalaisten ja venäläisten pörssilistattujen yhtiöiden IFRS-tilinpäätökset toisistaan. Tutkimuksen tarkoituksena on tunnistaa eroja ja yhtäläisyyksiä suomalaisessa ja venäläisessä IFRS-tilinpäätösraportoinnissa näkyvien valintojen (eng. overt options) suhteen. Tutkimuksen aineisto muodostuu kahdenkymmenen Helsingin ja Moskovan pörssiin listattujen blue chip -yhtiöiden IFRS-standardien mukaan laadituista tilikauden 2016 tilinpäätöksistä. Tutkimus on luonteeltaan kvantitatiivinen vertaileva tutkimus ja aineistoa analysoidaan ristiintaulukossa khiin neliö -riippumattomuustestillä. Tutkimustuloksista ilmenee, etteivät suomalaiset ja venäläiset IFRS-tilinpää…
Total ionizing dose (TID) evaluation of magnetic tunnel junction (MTJ) current sensors
2015
Abstract The paper shows an experimental study to know the behaviour of tunnel magnetoresistive effect-based current sensors configured in a Wheatstone bridge in response to irradiation. In particular the sensitivity, hysteresis, output offset voltage and input resistance are discussed when the sensors are submitted to a total irradiation dose of 43 krad with 36 krad/h dose rate. The same electrical parameters were studied subsequently once the irradiated sensors were submitted to an 80 °C annealing process. The studied TMR sensors are applied in a switched-mode power converter for space application.
Ontology-Based Information System
2014
We describe a novel way for creating information systems based on ontologies. The described solution is aimed at domain experts who would benefit from being able to quickly prototype fully-functional, web-based information system for data input, editing and analysis. The systems backbone is SPARQL 1.1 endpoint that enables organization users to view and edit the data, while outside users can get read-only access to the endpoint. The system prototype is implemented and successfully tested with Latvian medical data ontology with 60 classes and imported 5 000 000 data-level triples.