نتایج جستجو برای: especially when higher forecasting accuracy is needed

تعداد نتایج: 7978375  

2014
Chandan Roy Rita Kovordanyi Rita Kovordányi

Delivering accurate cyclone forecasts in time is of key importance when it comes to saving human lives and reducing economic loss. Difficulties arise because the geographical and climatological characteristics of the various cyclone formation basins are not similar, which entails that a single forecasting technique cannot yield reliable performance in all ocean basins. For this reason, global f...

Journal: :Appl. Soft Comput. 2014
Lech Birek Dobrila Petrovic John E. Boylan

This paper investigates the use of evolving fuzzy algorithms in forecasting. An Evolving Takagi-Sugeno algorithm (eTS), which is based on a recursive version of the Subtractive algorithm is considered. It groups data into several clusters based on Euclidean distance between the relevant independent variables. The Mod eTS algorithm, which incorporates a modified dynamic update of cluster radii w...

2016
Clark Joachim Kogan Jesse Johnson Jon Graham

Reduced alertness and high levels of cognitive fatigue due to sleep loss bring forth substantial risks in today’s 24/7 society. Biomathematical models can be used to help mitigate such risks by predicting quantitative levels of fatigue under sleep loss. These models help manage risk by providing information on the timing at which high levels of fatigue will occur; countermeasures can then be ta...

2013
Nikolaos Kourentzes Fotios Petropoulos Juan R. Trapero

Identifying the most appropriate time series model to achieve a good forecasting accuracy is a challenging task. We propose a novel algorithm that aims to mitigate the importance of model selection, while increasing the accuracy. Multiple time series are constructed from the original time series, using temporal aggregation. These derivative series highlight different aspects of the original dat...

Journal: :European Journal of Operational Research 2014
Fotios Petropoulos Spyros Makridakis Vassilis Assimakopoulos Konstantinos Nikolopoulos

Forecasting as a scientific discipline has progressed a lot in the last forty years, with Nobel prizes being awarded for seminar work in the field, most notably to Engle, Granger and Kahneman. Despite these advances, even today we are unable to answer a very simple question, the one that is always the first tabled during discussions with practitioners: “what is the best method for my data?”. In...

Journal: :International Journal of Information Technology and Decision Making 2004
Wei Huang Kin Keung Lai Yoshiteru Nakamori Shouyang Wang

Forecasting exchange rates is an important financial problem that is receiving increasing attention especially because of its difficulty and practical applications. Artificial neural networks (ANNs) have been widely used as a promising alternative approach for a forecasting task because of several distinguished features. Research efforts on ANNs for forecasting exchange rates are considerable. ...

2009
Hooman Homayounfard Paul J. Kennedy

There are certain performance parameters like packet delay, delay variation (jitter) and loss, which are decision factors for online quality of service (QoS) traffic routing. Although considerable efforts have been placed on the Internet to assure QoS, the dominant TCP/IP like the best-effort communications policy does not provide sufficient guarantee without abrupt change in the protocols. Est...

2015
Feng Zengxi Ren Qingchang Li Jianwei

Accurate air-conditioning load forecasting is the precondition for the optimal control and energy saving operation of central air-conditioning system. However, the single forecasting method, such as autoregressive integrated moving average (ARIMA), grey model (GM), multiple linear regression (MLR) and artificial neural network (ANN), has not enough accuracy. In order to improve the accuracy of ...

Journal: :Journal of Research on Adolescence 2021

This study examines the impact of peers’ previous cautious versus risky choices on adolescents’ risk-taking depending level information about risk. Adolescents completed an adaptation BART that manipulated social influence (cautious and risky) risk (i.e., informed, noninformed). Results showed impacts decisions noninformed but not informed BART. In BART, strongly decreased led to greater perfor...

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