Search results for "TLA"
showing 10 items of 1764 documents
Charles Nodier, Trilogie écossaise
2013
Charles Nodier’s summer ambulations through Scotland in 1821 were to spawn a genre: the romantic travelogue. The reader is invited on a journey through age-old legends and oneiric cartography, through the fogs of ancient Caledonia and modern Scotland, and into the land of goblins and fairies.
Wilhelm Pantenius, Jelgawas latweeschu draudzes rihta mahzitajs: us Jelgawas pilsehta un lauku draudses luhgschanu [Vilhelms Panteniuss, Jelgavas lat…
1850
Vibration control of base-isolated structures using mixed H2/H∞ output-feedback control
2009
A mixed H2/ H∞ output-feedback control design methodology for vibration reduction of base-isolated building structures modelled in the form of second-order linear systems is presented. Sufficient conditions for the design of a desired control are given in terms of linear matrix inequalities. A controller that guarantees asymptotic stability and a mixed H2/ H∞ performance for the closed-loop system of the structure is developed, based on a Lyapunov function. The performance of the controller is evaluated by means of simulations in MATLAB/Simulink.
Local capacity H<inf>∞</inf> control for production networks of autonomous work systems with time-varying delays
2009
This paper considers the problem of local capacity H ∞ control for a class of production networks of autonomous work systems with time-varying delays in the capacity changes. The system under consideration is modelled in a discrete-time singular form. Attention is focused on the design of a controller gain for the local capacity adjustments which maintains the work in progress (WIP) in each work system in the vicinity of planned levels and guarantees the asymptotic stability of the system and reduces the effect of the disturbance input on the controlled output to a prescribed level. In terms of a matrix inequality, a sufficient condition for the solvability of this problem is presented usin…
Jurista Dītriha Andreja Lēbera personālais fonds Latvijas Akadēmiskajā bibliotēkā
2004
Migratory connectivity amongst Baltic Sea salmon
2014
WAVEFRONT TESTER: Un nuevo laboratorio virtual para el estudio de los sensores frente de onda.
2016
[EN] We present a new virtual laboratory developed with MatlabcGUI (Graphical User Interface) used toteach di erent aberration eff ects in the "Tecnologi a de Sensores Optoelectr onicos" at "Escuela T ecnicaSuperior de Ingenier a del Diseño" of the Universitat Polit ecnica de Val encia. The objective of this lab is to provide a computer tool to study the working principle of a Shack Hartman sensor and the parameters that determine the dynamic range of the same. Some examples made with di fferent aberrations (defocus,astigmatism, coma) and for diff erent sensor con gurations are presented.
Topoloģijas optimizācija stieņu sistēmu modeļiem
2021
Topoloģijas optimizācijas paņēmieni ir moderns veids lai veidot efektīvus risinājumus tehniskām problēmām. Šajā darbā tiks apskatīts topoloģijas optimizācijas piegājiens lai izveidot optimālo stieņu modeli. Stieņu modeļu sistēmas ir plaši lietotas buvmehānikā, inženierijā un var būt derīgi sadzīvē. Iegūtie rezultāti palīdzēs taupīt ražošanas materiālus, enerģiju. Stieņu sistēmu galvenais pielietojums, kas būs apskatīts ir spiesto-stieptu elementu modeļi, bet rezultāti var būt viegli adaptēti arī citiem vajadzīgiem aprēķiniem. Šajā darbā ir smalki aplūkots pilns aprēķinu cikls, kas no topoloģijas optimizācijas uzdevuma, aprēķinot to ar galīgo elementu metodi ar vairākiem pārveidojumiem tiek …
Numerical Model for Shape Memory Alloy Actuators
2008
In order to realize a control system for Shape Memory Alloy (SMA) actuators, that ensure high displacement precisions, a numerical model that simulates SMA wire behavior subjected to thermo-mechanical actions, up to high number of cycles, has been set up. In particular, the constitutive model of Brinson, 1993,[1] coupled by a suitable kinetic low has been used. Beginning from such model, some corrections have been performed to take into account the deviations, in term of characteristic temperatures and mechanical responds, due to a numerous thermo-mechanical cycles. Furthermore, in order to complete and check the numerical model, experimental tests have been performed; initially the employe…
An Automatic Sleep Scoring Toolbox : Multi-modality of Polysomnography Signals’ Processing
2019
Sleep scoring is a fundamental but time-consuming process in any sleep laboratory. To speed up the process of sleep scoring without compromising accuracy, this paper develops an automatic sleep scoring toolbox with the capability of multi-signal processing. It allows the user to choose signal types and the number of target classes. Then, an automatic process containing signal pre-processing, feature extraction, classifier training (or prediction) and result correction will be performed. Finally, the application interface displays predicted sleep structure, related sleep parameters and the sleep quality index for reference. To improve the identification accuracy of minority stages, a layer-w…