Search results for " rene."
showing 10 items of 258 documents
Power dispatching of active generators using droop control in grid connected micro-grid
2014
Masteroppgave i fornybar energi ENE 500 Universitetet i Agder 2014 Renewable energy promises a green energy future for the world. However, many technical problems still have to be solved. Almost all renewable energy sources require power electronic converters for power processing and therefore inverter control systems and power dispatching strategies are significant in renewable energy applications. The existing electricity grid architecture is based on centralized power generations while most renewable power generations are distributed and connected to lower or medium voltage networks. Some of important renewable energy resources such as solar and wind power are intermittent in nature. Thi…
Estimating finite mixtures of semi-Markov chains: an application to the segmentation of temporal sensory data
2019
Summary In food science, it is of great interest to obtain information about the temporal perception of aliments to create new products, to modify existing products or more generally to understand the mechanisms of perception. Temporal dominance of sensations is a technique to measure temporal perception which consists in choosing sequentially attributes describing a food product over tasting. This work introduces new statistical models based on finite mixtures of semi-Markov chains to describe data collected with the temporal dominance of sensations protocol, allowing different temporal perceptions for a same product within a population. The identifiability of the parameters of such mixtur…
RENEWABLE ENERGY AND INNOVATION FOR SUSTAINABLE GREENHOUSE DISTRICTS
2009
Cēsu pils grāmatu apkalumi
2018
Essays on early modern conceptions of consciousness: Descartes, Cudworth, and Locke
2009
15./16.gs. mijas aktualitāšu atspoguļojums Jana Gosārta mākslā
2015
Maģistra darbā „15. / 16. gs. mijas aktaualitāšu atspoguļojums Jana Gosārta mākslā” mērķis ir analizēt Jana Gosārta radīto mākslas darbu sižetu saistību ar 15./16. gs. mijas sabiedriskajām aktualitātēm Nīderlandes teritorijā un novērtēt iespējas iegūtos rezultātus pielietot aplūkojamā laikmeta pētniecībā un izpratnes veidošanā par norisēm tajā. Mērķa realizēšanā tika izmantota ikonoloģiskā metode, kuru izveidojis Ervins Panofskis. Metode paredzēta mākslas darbu analīzei un padara iespējamu no šiem māksals darbiem iegūtās informācijas interpretāciju plašākā, vēsturiskā kontekstā. Rezultātā tika noskaidrots, ka konstatējama saikne Jana Gosārta mākslas darbiem un laikmeta aktualitātēm, kurā ti…
Daytime sensible heat flux estimation over heterogeneous surfaces using multitemporal land‐surface temperature observations
2016
Equations based on surface renewal (SR) analysis to estimate the sensible heat flux (H) require as input the mean ramp amplitude and period observed in the ramp‐like pattern of the air temperature measured at high frequency. A SR‐based method to estimate sensible heat flux (HSR‐LST) requiring only low‐frequency measurements of the air temperature, horizontal mean wind speed, and land‐surface temperature as input was derived and tested under unstable conditions over a heterogeneous canopy (olive grove). HSR‐LST assumes that the mean ramp amplitude can be inferred from the difference between land‐surface temperature and mean air temperature through a linear relationship and that the ramp freq…
On Capturing Oil Rents with a National Excise Tax Revisited
2004
In this paper the scope of Bergstrom’s (1982) results is studied. Moreover, his analysis is extended assuming that extraction cost is directly related to accumulated extractions. For the case of a competitive market it is found that the optimal policy is a constant tariff if extraction is costless. However, with depletion effects, the optimal tariff must ultimately be decreasing. For the case of a monopolistic market the results depend crucially on the kind of strategies the importing country governments can play and on whether the monopolist chooses the price or extraction rate. For a price-setting monopolist it is shown that the importing countries cannot use a tariff to capture monopoly …
Cambio climático y sustentabilidad económica y social: implicaciones sobre el bienestar social
2008
This article puts forward an explanation of climate change within the context of global change. Climate change can be seen as the spearhead; as a manifestation of the increasing unsustainability of planet Earth. We consider some of the effects of this change, examining its uneven impact on developed and under-developed countries. We then put forward various proposals of how to deal with climate change, highlighting Socolow’s theory in particular. Lastly, we move on to the debate raised by climate change, its impact and possible strategic steps to remedy the situation within the context of environmental sustainability. This will probably lead to a new economic, social and environmental parad…