Combination of a Conceptual Model and an Autoregressive Error Model for Improving Short Time Forecasting

1982 ◽  
Vol 13 (4) ◽  
pp. 233-246 ◽  
Author(s):  
Angela Lundberg
Keyword(s):  
Conceptual Model ◽  
Long Range ◽  
Autoregressive Model ◽  
Error Model ◽  
Error Functions ◽  
Short Time ◽  
Hbv Model

An autoregressive error model has been tested on the residuals of the conceptual HBV-model for the Emån catchment. The autoregressive model gives considerable improvements for real shorttime forecasting, but for long range (10 days or more) forecasting no improvement is achieved compared to the conceptual model. Separation of the error functions for high and low discharges does not give any further improvement.

SHORT-TIME DYNAMICS OF THE RANDOM n-VECTOR MODEL WITH LONG-RANGE INTERACTION

2003 ◽  
Vol 17 (23) ◽  
pp. 1227-1236 ◽  
Author(s):  
YUAN CHEN ◽  
ZHI-BING LI
Keyword(s):  
Long Range ◽  
High Temperature Phase ◽  
Vector Model ◽  
Temperature Phase ◽  
Range Interaction ◽  
Time Dynamics ◽  
Long Range Interaction ◽  
Renormalization Group Approach ◽  
Short Time ◽  
N Vector

The short-time critical behavior of the random n-vector model with long-range interaction is studied by the theoretic renormalization-group approach. After a sudden quench to the critical temperature from the high temperature phase, the system is released to an evolution within model A dynamics. The initial slip exponents and the dynamic exponent are calculated to two-loop order.

scholarly journals Exploring Successful Small Urban Spaces’ Criteria with Emphasis on Cultural Context

2021 ◽  
Vol 15 (4) ◽  
pp. 475-482
Author(s):  
Parvin Partovi ◽  
Kebria Sedaghat Rostami ◽  
Amir Shakibamanesh
Keyword(s):  
Conceptual Model ◽  
Public Space ◽  
Urban Space ◽  
Cultural Context ◽  
Public Spaces ◽  
Urban Spaces ◽  
Cultural Issues ◽  
Human Needs ◽  
Short Time ◽  
The City

In the crowded cities of the present age, public spaces can provide a quiet area away from the hustle and bustle of the city that citizens can interact with by incorporating utility features and meeting human needs and Relax there. Small urban spaces are among the most important and effective urban spaces to achieve this goal. Because these spaces due to their small size and lower costs (compared to larger spaces) for construction can be created in large numbers and distributed throughout the city. In this way, citizens will be able to reach a public urban space on foot in a short time. If these spaces are well designed, they can encourage people to stay in and interact with each other. It is not difficult to identify and experience high-quality successful places, but identifying the reasons for their success is difficult and even more difficult, understanding if similar spaces in other places can be considered successful. This question is important because public space with deep social content is considered a cultural product. Public space is the product of the historical and socio-cultural forces of society. Therefore, one of the most important issues that should be considered in the study of public spaces and the reasons for their success is the cultural context. In Iranian cities that have been influenced by the values and principles of Islam,recognizing Islamic principles and their role in shaping public spaces can lead us to desirable results. The purpose of this article is to develop a conceptual model of successful small urban spaces with an emphasis on cultural issues, especially in Iranian-Islamic cities. In this regard, the effective criteria for the success of urban spaces in general and small urban spaces in particular in the two categories of Western countries and Iranian Islamic cities were examined and then, taking into account the criteria derived from cultural theorists, the conceptual model of research with 38 subcriteria is provided.

scholarly journals Soft combination of local models in a multi-objective framework

2007 ◽  
Vol 4 (1) ◽  
pp. 91-123 ◽  
Author(s):  
F. Fenicia ◽  
D. P. Solomatine ◽  
H. H. G. Savenije ◽  
P. Matgen
Keyword(s):  
Conceptual Model ◽  
Full Range ◽  
Local Models ◽  
Hydrologic Models ◽  
Single Model ◽  
Hydrological Simulation ◽  
Fixed Model ◽  
Discharge Simulation ◽  
Catchment Responses ◽  
Hbv Model

Abstract. Conceptual hydrologic models are useful tools as they provide an interpretable representation of the hydrologic behaviour of a catchment. Their representation of catchment's hydrological processes and physical characteristics, however, implies simplification of the complexity and heterogeneity of reality. As a result, those models often show a lack of flexibility in reproducing the vast spectrum of catchment responses. Hence, the accuracy in reproducing certain aspects of the system behaviour is often paid in terms of a lack of accuracy in the representation of other aspects. By acknowledging the structural limitations of those models, a modular approach to hydrological simulation is proposed. Instead of using a single model to reproduce the full range of catchment responses, multiple models are used, each of them assigned to a specific task. The approach is here demonstrated in the case where the different models are associated with different parameter realizations within a fixed model structure. We show that using a composite "global" model, obtained by a combination of individual "local" models, the accuracy of the simulation is improved. We argue that this approach can be useful because it partially overcomes the structural limitations that a conceptual model might exhibit. The approach is shown in application to the discharge simulation of the experimental Alzette River basin in Luxembourg, with a conceptual model that follows the structure of the HBV model.

Non-Equilibrium Critical Dynamics of Ferromagnets with Long Range Correlated Defects

2012 ◽  
Vol 190 ◽  
pp. 31-34
Author(s):  
Dmitry N. Kulikov ◽  
Pavel V. Prudnikov
Keyword(s):  
Critical Exponent ◽  
Long Range ◽  
Critical Behavior ◽  
Disordered Systems ◽  
Asymptotic Series ◽  
Three Dimensional ◽  
Time Regime ◽  
Short Time ◽  
Short Time Evolution ◽  
Non Equilibrium

The simultaneous effect of non-equilibrium initial states and correlation betweendefects of the structure on the evolution of anisotropic disordered systems at the critical pointwas analyzed. The field theory description of the non-equilibrium critical behavior of three-dimensional disordered systems with the long-range correlated defects was given and the dy-namical critical exponent of the short-time evolution was calculated in the two-loop approxima-tion without the use of the "-expansion. The values of the dynamical critical exponent obtainedby using various methods for summing asymptotic series were compared with the results ofthe computer simulation of the non-equilibrium critical behavior of the three-dimensional dis-ordered Ising model in the short-time regime.

scholarly journals The short-time critical behaviour of the Ginzburg-Landau model with long-range interaction

2000 ◽  
Vol 18 (2) ◽  
pp. 289-296 ◽  
Author(s):  
Y. Chen ◽  
S.H. Guo ◽  
Z.B. Li ◽  
S. Marculescu ◽  
L. Schülke
Keyword(s):  
Long Range ◽  
Critical Behaviour ◽  
Range Interaction ◽  
Ginzburg Landau ◽  
Landau Model ◽  
Long Range Interaction ◽  
Time Critical ◽  
Short Time

Explaining mobile game takeoff through information configuration

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Zhongjun Tang ◽  
Bo He
Keyword(s):  
Conceptual Model ◽  
Qualitative Comparative Analysis ◽  
Mobile Games ◽  
Content Type ◽  
Mobile Game ◽  
Initial Stage ◽  
Package Size ◽  
Complex Relationships ◽  
Short Time

PurposeThe purpose of this paper is to explore how the number and quality of games that publishers have released, popularity of game genre, age rating and package size are configured to determine the mobile game takeoff in a short time.Design/methodology/approachBased on the signaling theory, the authors present a conceptual model. Using actual data about 170 mobile games at their initial stage in the Apple App store, the authors test the conceptual model by applying fuzzy qualitative comparative analysis (fsQCA).FindingsThe findings identify four solutions that explain Mobile game takeoff in a short time. The authors highlight the role of the number and quality of games released by publishers, as well as that of popular game genres, which are always core factors when present.Originality/valueThis paper complements the previous research on the diffusion of mobile games by exploring which information combinations can lead to mobile games takeoff in a short time from the perspective of configuration. FsQCA serves as a better tool for explaining the complex relationships among variables than a regression analysis approach does. The authors extend existing knowledge on how the number and quality of games that publishers have released, popularity of game genre, age rating and package size combine to lead to takeoff of mobile games in a short time.

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