Search results for "Peak"
showing 10 items of 377 documents
The acid–base flow battery : Sustainable energy storage via reversible water dissociation with bipolar membranes
2020
The increasing share of renewables in electric grids nowadays causes a growing daily and seasonal mismatch between electricity generation and demand. In this regard, novel energy storage systems need to be developed, to allow large-scale storage of the excess electricity during low-demand time, and its distribution during peak demand time. Acid–base flow battery (ABFB) is a novel and environmentally friendly technology based on the reversible water dissociation by bipolar membranes, and it stores electricity in the form of chemical energy in acid and base solutions. The technology has already been demonstrated at the laboratory scale, and the experimental testing of the first 1 kW pilot pla…
Demand Response Pricing Strategies for Islanded Microgrids
2013
In this paper, Time of Use and Critical Peak Pricing policies are designed and their effects on optimized operation is evaluated. For this purpose, an optimal operation algorithm is employed and the relevant production costs are derived. As far as the Time of Use policy is concerned, such costs are observed to be different in two time intervals of the day, due to the loads changing effect and the production of renewable energy. Whereas in the Critical Peak Pricing Policy, a peak time interval is identified to set up different pricing rates. The optimization algorithm used to carry out the work described above minimizes the microgrid's energy losses, the production costs and the Green House …
MANGANELLI SCONCLUSIONATO. UN CONVEGNO A PALERMO
2022
Il contributo illustra il carattere scientifico del convegno organizzato a Palermo il 19-20 maggio 2022 e passa in rassegna i singoli saggi dei relatori ospiti del convegno, inquadrandoli nelle varie linee di poetica dello scrittore e valorizzandone gli aspetti di originalità nel contesto degli studi su Manganelli
Speaker variables and their relation to language change
2018
The aim of this chapter is to discuss the relationship between variation processes and linguistic change and the speaker variables identified by Romance sociolinguistic studies. In particular, Romance sociolinguistics focuses on three different points of view: the socio-biographical characteristics of the speaker; the varieties related to social differences, and the relation between social groups and linguistic repertoire. In our work, we will study the socio-biographical characteristics, that Anglo-American linguistics defines as “speaker variables”, analyzing those variables more closely related in Romance studies to the diastratic vari-ation (age, sex/gender, social class). In certain ca…
Lettura dei 'segni' nella letteratura e cultura di lingua tedesca alle soglie dell'età moderna. Fra libero arbitrio e predestinazione
2022
The essay proposes an excursus through German-speaking culture between 1400 and 1650, aiming to highlight how the reading of 'signs',both artificial and natural, underwent substantial changes inthe perios under examination. In optimistic anthropological contexts, the reading is mainly the result of a widespread aspiration to knowledge and does not excude the free will of human beings. When a pessimistic conception dominates, the sign is the external manifestation of an ineluctable destiny.
Spectral estimators for Doppler analysis of intracoronary ultrasound catheters
2002
With the zero-cross-detection method (ZCD) it has been shown that it is not possible to achieve a reproducible quantitative, and robust evaluation of an inter-coronary audio signal. The authors define spectral estimators to analyze the Doppler-audio signal. Measurements in a blood flow model have shown that the ZCD method underestimates the expected velocity at all speeds. Spectral analysis allows the determination of the actual and peak velocity more robustly and precisely. >
Monitoring of the smoking process by multicommutation Fourier Transform Infrared spectroscopy
2007
Abstract Nicotine was selected as the target molecule for monitoring of the smoking process by multicommutation Fourier Transform Infrared spectroscopy (FTIR). The method involved the use of CHCl3 for on-line extraction of nicotine from tobacco, cigarette filters and tobacco ash from NH4OH alkalinized samples, and absorbance measurement of the characteristic band at 1316 cm−1 in the stopped-flow mode, by obtaining the peak area in the range between 1334 and 1300 cm−1. Under the best operational conditions, the procedure developed provided a detection limit of 0.05 mg mL−1 nicotine, corresponding to 0.5 mg g−1 in the solid sample, a relative standard deviation less than 2.5%, and a sampling …
Two Perspectives on the Communication Skills of Political Leaders
2012
This study aimed to outline the current communication skills of political leaders. Media data, in total 5,697 items, were collected from four newspapers in Finland over a period of six months in 2008. The interview data consist of eight interviews with Finnish party leaders. All materials were analyzed by qualitative content analysis. Two kinds of perspectives are described: the media perspective by illustrating what kind of descriptions, evaluations and requirements for communication of political leaders are established in newspapers and the political leaders' perspective by reporting the experiences and evaluations of political leaders themselves. These two perspectives are compared. The …
PRODUCTION OF THE SPANISH VOWEL SYSTEM BY CHINESE SPEAKERS
2018
RESUMEN En este trabajo se comparan los sistemas vocálicos del español y del chino pronunciados por hablantes nativos con el objetivo de presentar a continuación las peculiaridades del sistema vocálico español de un grupo de estudiantes de China con un nivel intermedio de español. El estudio de las similitudes y las diferencias entre los sistemas nativos nos ha permitido prever en qué áreas pueden diferir las vocales pronunciadas por aprendices chinos de las vocales españolas. Los resultados indican que el sistema vocálico español de los estudiantes chinos es estructuralmente similar al sistema nativo, pero con algunas diferencias fonéticas: en primer lugar, tiene una extensión mayor por lo…
Using privacy-transformed speech in the automatic speech recognition acoustic model training
2020
Automatic Speech Recognition (ASR) requires huge amounts of real user speech data to reach state-of-the-art performance. However, speech data conveys sensitive speaker attributes like identity that can be inferred and exploited for malicious purposes. Therefore, there is an interest in the collection of anonymized speech data that is processed by some voice conversion method. In this paper, we evaluate one of the voice conversion methods on Latvian speech data and also investigate if privacy-transformed data can be used to improve ASR acoustic models. Results show the effectiveness of voice conversion against state-of-the-art speaker verification models on Latvian speech and the effectivene…