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Koczor Sándor Vuts József Caulfield John C. Withall David M. Sarria André Pickett John A. Birkett Michael A. Csonka Éva Bálintné Tóth Miklós 《Journal of chemical ecology》2021,47(6):525-533
Journal of Chemical Ecology - The sex pheromone composition of alfalfa plant bugs, Adelphocoris lineolatus (Goeze), from Central Europe was investigated to test the hypothesis that insect species... 相似文献
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Clegg R.G. Withall M.S. Moore A.W. Phillips I.W. Parish D.J. Rio M. Landa R. Haddadi H. Kyriakopoulos K. Auge J. Clayton R. Salmon D. 《Communications, IET》2009,3(6):957-966
The production of a large-scale monitoring system for a high-speed network leads to a number of challenges. These challenges are not purely technical but also socio-political and legal. The number of stakeholders in such monitoring activity is large including the network operators, the users, the equipment manufacturers and, of course, the monitoring researchers. The MASTS project (measurement at all scales in time and space) was created to instrument the high-speed JANET lightpath network and has been extended to incorporate other paths supported by JANET(UK). Challenges the project has faced included: simple access to the network; legal issues involved in the storage and dissemination of the captured information, which may be personal; the volume of data captured and the rate at which these data appear at store. To this end, the MASTS system will have established four monitoring points each capturing packets on a high-speed link. Traffic header data will be continuously collected, anonymised, indexed, stored and made available to the research community. A legal framework for the capture and storage of network measurement data has been developed which allows the anonymised IP traces to be used for research purposes. 相似文献
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As communication networks increase in performance and complexity, and more dependence is placed upon them, it becomes ever more important that their behaviour is understood in an efficient and timely manner. Visualisation is an established technique for the presentation of the vast volume of data yielded in monitoring such networks. It is apparent, however, that much of the work in this area has been performed in isolation, and it is timely that a review of this research is conducted. The techniques for the visualisation of communication networks and related measurements are surveyed. The research is classified by the type of visualisation used and is separated into three classes: geographic visualisations, in which the data are presented with respect to the physical location of nodes in the network; abstract topological visualisations, in which the relationships between nodes are presented independently of physical location; and plot-based visualisation, in which the focus is a single point in the network, often presented with respect to time. The research in this area is reviewed and the techniques proposed are discussed in terms of these three classes 相似文献
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Sándor Koczor Ferenc Szentkirályi József Vuts John C. Caulfield David M. Withall John A. Pickett Michael A. Birkett Miklós Tóth 《Journal of chemical ecology》2018,44(2):137-146
Green lacewings (Chrysopidae) are predators of soft-bodied pest insects and are among the most important biological control agents in crop protection. Chrysopa spp. are of special importance since, unlike most green lacewing species, adults are also predatory. The current study was undertaken in search of Chrysopa formosa compounds with semiochemical activity. Using coupled gas chromatography-electroantennography (GC-EAG), head and thorax extracts of C. formosa elicited EAG responses to a compound subsequently identified by coupled GC/mass spectrometry, microchemistry, chemical synthesis and GC peak enhancement as (Z)-4-tridecene. In field experiments, this compound decreased attraction of adult C. formosa to (1R,4aS,7S,7aR)-nepetalactol and that of Chrysoperla carnea species-complex to a ternary floral lure, with the inhibitory effect found to be dose-dependent. Our results suggest that (Z)-4-tridecene may serve as a general warning signal among multiple green lacewing species. Perspectives for potential practical applications are discussed. 相似文献
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A representation has been developed that addresses some of the issues with other Genetic Program representations while maintaining
their advantages. This combines the easy reproduction of the linear representation with the inheritable characteristics of
the tree representation by using fixed-length blocks of genes representing single program statements. This means that each
block of genes will always map to the same statement in the parent and child unless it is mutated, irrespective of changes
to the surrounding blocks. This method is compared to the variable length gene blocks used by other representations with a
clear improvement in the similarity between parent and child. In addition, a set of list evaluation and manipulation functions
was evolved as an application of the new Genetic Program components. These functions have the common feature that they all
need to be 100% correct to be useful. Traditional Genetic Programming problems have mainly been optimization or approximation
problems. The list results are good but do highlight the problem of scalability in that more complex functions lead to a dramatic
increase in the required evolution time. 相似文献
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