Optimisation methodology for integrated equipment installation in new engine architecture nacelles

2019 ◽  
Vol 234 (10) ◽  
pp. 1706-1720
Author(s):  
Wilhelmus J Vankan ◽  
Robert Maas ◽  
Vincent Peyron
Keyword(s):  
Routing Algorithms ◽  
Software Implementation ◽  
The Novel ◽  
Restricted Volume ◽  
Aero Engines ◽  
Engine Systems

The development of new higher efficiency turbofan aero engines requires several design enhancements that typically result in shorter and slimmer nacelles. Consequently these engines provide less space for the engine systems installation and for maintenance accessibility. In the Novel Integration of Powerplant System Equipment project, optimisation methodologies are being investigated and developed for the integrated installation of equipment into the restricted volume of new architecture engines’ nacelles. The underlying optimisation methodology is built on a graph based approach involving efficient routing algorithms. Besides the methodology, also the software implementation and its application to engine equipment installation design cases are presented in this paper.

The Novel Routing Algorithms Based on ACO and GAs

2010 ◽  
Vol 121-122 ◽  
pp. 329-334
Author(s):  
Rong Hu Zhang ◽  
Shu Zhou
Keyword(s):  
Load Balance ◽  
Ant Colony Algorithm ◽  
Routing Algorithm ◽  
Dynamic Network ◽  
Routing Algorithms ◽  
Path Selection ◽  
The Novel ◽  
Network Environment ◽  
Network Load ◽  
Crossover And Mutation

The paper proposed a novel methods in order to solve the congestion and routing oscillation, which based on crossover and mutation of the ant colony algorithm to achieve dynamic QoS routing realization. The algorithm expanded the scope of the search path selection adaptively adjust the strategy and the amount of information to determine the probability of renewal strategy, which can better adapt to dynamic network environment, you can make the shortest possible path of choice to meet the real-time applications, while avoiding link load is heavy, maintaining the distribution of network load balance. The simulation results show that the routing algorithm has better convergence speed and stability, which can more effectively address congestion and routing oscillation, its performance compared with traditional methods have been noticeably elevated, indicating it has a better multimedia network environment flexibility.

The novel steroidal glycoside from the dried bulb of Allium Macrostemon Bunge inhibits platelet activation

2010 ◽  
Vol 34 (8) ◽  
pp. S33-S33
Author(s):  
Wenchao Ou ◽  
Haifeng Chen ◽  
Yun Zhong ◽  
Benrong Liu ◽  
Keji Chen
Keyword(s):  
Platelet Activation ◽  
The Novel ◽  
Steroidal Glycoside ◽  
Allium Macrostemon

The Involuntary Capture of Attention by Sound

2010 ◽  
Vol 57 (1) ◽  
pp. 68-76 ◽  
Author(s):  
Fabrice B. R. Parmentier ◽  
Pilar Andrés
Keyword(s):  
Older Adults ◽  
Mismatch Negativity ◽  
Visual Task ◽  
The Novel ◽  
Auditory Oddball ◽  
Current Trial ◽  
Electrophysiological Responses ◽  
Electrophysiological Studies ◽  
The Cross ◽  
Task Sets

The presentation of auditory oddball stimuli (novels) among otherwise repeated sounds (standards) triggers a well-identified chain of electrophysiological responses: The detection of acoustic change (mismatch negativity), the involuntary orientation of attention to (P3a) and its reorientation from the novel. Behaviorally, novels reduce performance in an unrelated visual task (novelty distraction). Past studies of the cross-modal capture of attention by acoustic novelty have typically discarded from their analysis the data from the standard trials immediately following a novel, despite some evidence in mono-modal oddball tasks of distraction extending beyond the presentation of deviants/novels (postnovelty distraction). The present study measured novelty and postnovelty distraction and examined the hypothesis that both types of distraction may be underpinned by common frontally-related processes by comparing young and older adults. Our data establish that novels delayed responses not only on the current trial and but also on the subsequent standard trial. Both of these effects increased with age. We argue that both types of distraction relate to the reconfiguration of task-sets and discuss this contention in relation to recent electrophysiological studies.

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