scholarly journals Implication of Negative Entropy Flow for Local Rainfall

Entropy ◽  
2013 ◽  
Vol 15 (12) ◽  
pp. 3449-3457 ◽  
Author(s):  
Ying Liu ◽  
Chongjian Liu ◽  
Zhaohui Li
Keyword(s):  
Entropy Flow ◽  
Negative Entropy ◽  
Local Rainfall

Mechanism and estimation of negative entropy flow in terrestrial system

2005 ◽  
Vol 15 (2) ◽  
pp. 185-188 ◽  
Author(s):  
Li Shaoxin ◽  
Hua Ben ◽  
Han Guangze ◽  
Wen Dehual
Keyword(s):  
Entropy Flow ◽  
Negative Entropy ◽  
Terrestrial System

scholarly journals Research on Evaluating the Sustainable Operation of Rail Transit System Based on QFD and Fuzzy Clustering

Entropy ◽  
2020 ◽  
Vol 22 (7) ◽  
pp. 750
Author(s):  
Bing Yan ◽  
Liying Yu ◽  
Jing Wang
Keyword(s):  
Fuzzy Clustering ◽  
Weighted Average ◽  
Rail Transit ◽  
Second Phase ◽  
Customer Requirements ◽  
Entropy Flow ◽  
Transit System ◽  
Negative Entropy ◽  
Sustainable Operation ◽  
Method Of Evaluation

The purpose of this study is to evaluate the sustainable operation of rail transit system. In rail transit system, as the most important aspect of negative entropy flow, the effective strategy can offset the increasing entropy of the system and make it have the characteristics of dissipative structure, so as to realize the sustainable operation. At first, this study constructs the Pressure-State-Response (PSR) model to evaluate the sustainable operation of rail transit system. In this PSR model, “pressure” is viewed as customer requirements, which answers the reasons for such changes in rail transit system; “state” refers to the state and environment of system activities, which can be described as the challenges of coping with system pressure; “response” describes the system’s actions to address the challenges posed by customer needs, namely operational strategies. Moreover, then, 13 pressure indices, five state indices and 11 response indices are summarized. In addition, based on quality function deployment (QFD), with 13 pressure indices as input variables, five state indices as customer requirements (CRs) of QFD and 11 response indices as technical attributes (TAs) of QFD, this study proposed the three-phase evaluation method of the sustainable operation of rail transit system to obtain the operational strategy (that is, negative entropy flow): The first phase is to verify that 13 pressure indices can be clustered into five state indices by fuzzy clustering analysis; The second phase is to get the weights of five state indices by evidential reasoning; The third phase is to rate the importance of 11 response indices by integrating fuzzy weighted average and expected value operator. Finally, the proposed model and method of evaluation are applied to the empirical analysis of Shanghai rail transit system. Finally, we come to the conclusion that Shanghai rail transit system should take priority from the following five aspects: “advancement of design standards”, “reliability of subway facilities”, “completeness of operational rules”, “standardization of management operation” and “rationality of passenger flow control”.

Entropy flow in a two-component system with periodic geophysical inputs

1985 ◽  
Vol 8 (5) ◽  
pp. 515-530
Author(s):  
F. D'Isep ◽  
L. Sertorio ◽  
R. S. Berry
Keyword(s):  
Two Component System ◽  
Entropy Flow ◽  
Component System ◽  
Two Component

scholarly journals On What Scale Can We Predict the Agronomic Onset of the West African Monsoon?

2016 ◽  
Vol 144 (4) ◽  
pp. 1571-1589 ◽  
Author(s):  
Rory G. J. Fitzpatrick ◽  
Caroline L. Bain ◽  
Peter Knippertz ◽  
John H. Marsham ◽  
Douglas J. Parker
Keyword(s):  
West Africa ◽  
Noise Analysis ◽  
West African Monsoon ◽  
West African ◽  
New Method ◽  
The West ◽  
African Monsoon ◽  
Spatial Consistency ◽  
Local Stakeholders ◽  
Local Rainfall

Abstract Accurate prediction of the commencement of local rainfall over West Africa can provide vital information for local stakeholders and regional planners. However, in comparison with analysis of the regional onset of the West African monsoon, the spatial variability of the local monsoon onset has not been extensively explored. One of the main reasons behind the lack of local onset forecast analysis is the spatial noisiness of local rainfall. A new method that evaluates the spatial scale at which local onsets are coherent across West Africa is presented. This new method can be thought of as analogous to a regional signal against local noise analysis of onset. This method highlights regions where local onsets exhibit a quantifiable degree of spatial consistency (denoted local onset regions or LORs). It is found that local onsets exhibit a useful amount of spatial agreement, with LORs apparent across the entire studied domain; this is in contrast to previously found results. Identifying local onset regions and understanding their variability can provide important insight into the spatial limit of monsoon predictability. While local onset regions can be found over West Africa, their size is much smaller than the scale found for seasonal rainfall homogeneity. A potential use of local onset regions is presented that shows the link between the annual intertropical front progression and local agronomic onset.

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