共查询到10条相似文献,搜索用时 125 毫秒
1.
In this paper, we introduce a supernode amalgamation algorithm which takes into account the characteristics of a hypermatrix
data structure. The resulting frontal tree is then used to create a variable-sized partitioning of the hypermatrix. The sparse
hypermatrix Cholesky factorization obtained runs slightly faster than the one which uses a fixed-sized partitioning. The algorithm
also reduces data dependencies which limit exploitation of parallelism.
相似文献
Juan J. NavarroEmail: |
2.
Julian Togelius Simon Lucas Ho Duc Thang Jonathan M. Garibaldi Tomoharu Nakashima Chin Hiong Tan Itamar Elhanany Shay Berant Philip Hingston Robert M. MacCallum Thomas Haferlach Aravind Gowrisankar Pete Burrow 《Genetic Programming and Evolvable Machines》2008,9(4):295-329
This paper describes the simulated car racing competition that was arranged as part of the 2007 IEEE Congress on Evolutionary
Computation. Both the game that was used as the domain for the competition, the controllers submitted as entries to the competition
and its results are presented. With this paper, we hope to provide some insight into the efficacy of various computational
intelligence methods on a well-defined game task, as well as an example of one way of running a competition. In the process,
we provide a set of reference results for those who wish to use the simplerace game to benchmark their own algorithms. The paper is co-authored by the organizers and participants of the competition.
相似文献
Julian Togelius (Corresponding author)Email: |
Simon LucasEmail: |
Ho Duc ThangEmail: |
Jonathan M. GaribaldiEmail: |
Tomoharu NakashimaEmail: |
Chin Hiong TanEmail: |
Itamar ElhananyEmail: |
Shay BerantEmail: |
Philip HingstonEmail: |
Robert M. MacCallumEmail: |
Thomas HaferlachEmail: |
Aravind GowrisankarEmail: |
Pete BurrowEmail: |
3.
Eleanor Toye Richard Sharp Anil Madhavapeddy David Scott Eben Upton Alan Blackwell 《Personal and Ubiquitous Computing》2007,11(2):97-106
We present a study of using camera-phones and visual-tags to access mobile services. Firstly, a user-experience study is described in which participants were both observed learning to interact with a prototype mobile service and interviewed
about their experiences. Secondly, a pointing-device task is presented in which quantitative data was gathered regarding the speed and accuracy with which participants aimed and clicked
on visual-tags using camera-phones. We found that participants’ attitudes to visual-tag-based applications were broadly positive,
although they had several important reservations about camera-phone technology more generally. Data from our pointing-device
task demonstrated that novice users were able to aim and click on visual-tags quickly (well under 3 s per pointing-device
trial on average) and accurately (almost all meeting our defined speed/accuracy tradeoff of 6% error-rate). Based on our findings,
design lessons for camera-phone and visual-tag applications are presented.
相似文献
Eleanor Toye (Corresponding author)Email: |
Richard SharpEmail: |
Anil MadhavapeddyEmail: |
David ScottEmail: |
Eben UptonEmail: |
Alan BlackwellEmail: |
4.
Inverse multi-objective robust evolutionary design 总被引:2,自引:0,他引:2
Dudy Lim Yew-Soon Ong Yaochu Jin Bernhard Sendhoff Bu Sung Lee 《Genetic Programming and Evolvable Machines》2006,7(4):383-404
In this paper, we present an Inverse Multi-Objective Robust Evolutionary (IMORE) design methodology that handles the presence
of uncertainty without making assumptions about the uncertainty structure. We model the clustering of uncertain events in
families of nested sets using a multi-level optimization search. To reduce the high computational costs of the proposed methodology
we proposed schemes for (1) adapting the step-size in estimating the uncertainty, and (2) trimming down the number of calls
to the objective function in the nested search. Both offline and online adaptation strategies are considered in conjunction
with the IMORE design algorithm. Design of Experiments (DOE) approaches further reduce the number of objective function calls
in the online adaptive IMORE algorithm. Empirical studies conducted on a series of test functions having diverse complexities
show that the proposed algorithms converge to a set of Pareto-optimal design solutions with non-dominated nominal and robustness
performances efficiently.
相似文献
Dudy Lim (Corresponding author)Email: |
Yew-Soon OngEmail: |
Yaochu JinEmail: |
Bernhard SendhoffEmail: |
Bu Sung LeeEmail: |
5.
Quantitative usability requirements are a critical but challenging, and hence an often neglected aspect of a usability engineering process. A case study is described where quantitative usability requirements played a key role in the development of a new user interface of a mobile phone. Within the practical constraints of the project, existing methods for determining usability requirements and evaluating the extent to which these are met, could not be applied as such, therefore tailored methods had to be developed. These methods and their applications are discussed.
相似文献
Timo Jokela (Corresponding author)Email: |
Jussi KoivumaaEmail: |
Jani PirkolaEmail: |
Petri SalminenEmail: |
Niina KantolaEmail: |
6.
Multimodal support to group dynamics 总被引:1,自引:1,他引:0
Fabio Pianesi Massimo Zancanaro Elena Not Chiara Leonardi Vera Falcon Bruno Lepri 《Personal and Ubiquitous Computing》2008,12(3):181-195
The complexity of group dynamics occurring in small group interactions often hinders the performance of teams. The availability
of rich multimodal information about what is going on during the meeting makes it possible to explore the possibility of providing
support to dysfunctional teams from facilitation to training sessions addressing both the individuals and the group as a whole.
A necessary step in this direction is that of capturing and understanding group dynamics. In this paper, we discuss a particular
scenario, in which meeting participants receive multimedia feedback on their relational behaviour, as a first step towards
increasing self-awareness. We describe the background and the motivation for a coding scheme for annotating meeting recordings
partially inspired by the Bales’ Interaction Process Analysis. This coding scheme was aimed at identifying suitable observable
behavioural sequences. The study is complemented with an experimental investigation on the acceptability of such a service.
相似文献
Fabio Pianesi (Corresponding author)Email: |
Massimo ZancanaroEmail: |
Elena NotEmail: |
Chiara LeonardiEmail: |
Vera FalconEmail: |
Bruno LepriEmail: |
7.
Matt Jones Steve Jones Gareth Bradley Nigel Warren David Bainbridge Geoff Holmes 《Personal and Ubiquitous Computing》2008,12(7):513-525
Listening to music on personal, digital devices whilst mobile is an enjoyable, everyday activity. We explore a scheme for
exploiting this practice to immerse listeners in navigation cues. Our prototype, ONTRACK, continuously adapts audio, modifying
the spatial balance and volume to lead listeners to their target destination. First we report on an initial lab-based evaluation
that demonstrated the approach’s efficacy: users were able to complete tasks within a reasonable time and their subjective
feedback was positive. Encouraged by these results we constructed a handheld prototype. Here, we discuss this implementation
and the results of field-trials. These indicate that even with a low-fidelity realisation of the concept, users can quite
effectively navigate complicated routes.
相似文献
Matt Jones (Corresponding author)Email: |
Steve JonesEmail: |
Gareth BradleyEmail: |
Nigel WarrenEmail: |
David BainbridgeEmail: |
Geoff HolmesEmail: |
8.
This paper proposes an appearance generative mixture model based on key frames for meanshift tracking. Meanshift tracking
algorithm tracks an object by maximizing the similarity between the histogram in tracking window and a static histogram acquired
at the beginning of tracking. The tracking therefore could fail if the appearance of the object varies substantially. In this
paper, we assume the key appearances of the object can be acquired before tracking and the manifold of the object appearance
can be approximated by piece-wise linear combination of these key appearances in histogram space. The generative process is
described by a Bayesian graphical model. An Online EM algorithm is proposed to estimate the model parameters from the observed
histogram in the tracking window and to update the appearance histogram. We applied this approach to track human head motion
and to infer the head pose simultaneously in videos. Experiments verify that our online histogram generative model constrained
by key appearance histograms alleviates the drifting problem often encountered in tracking with online updating, that the
enhanced meanshift algorithm is capable of tracking object of varying appearances more robustly and accurately, and that our
tracking algorithm can infer additional information such as the object poses.
Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users.
相似文献
Jilin Tu (Corresponding author)Email: |
Hai TaoEmail: |
Thomas HuangEmail: |
9.
Arunas Augustinaitis Richard Ennals Egle Malinauskiene Rimantas Petrauskas 《AI & Society》2009,23(1):41-50
The paper reflects on the unique experience of social and technological development in Lithuania since the regaining of independence
as a newly reshaped society constructing a distinctive competitive IST-based model at global level. This has presented Lithuanian
pattern of how to integrate different experiences and relations between generations in implementing complex information society
approaches. The resulting programme in general is linked to the Lisbon objectives of the European Union. The experience of
transitional countries in Europe, each different but facing some common problems, may be useful to developing countries in
Africa.
相似文献
Arunas Augustinaitis (Corresponding author)Email: |
Richard EnnalsEmail: |
Egle MalinauskieneEmail: |
Rimantas PetrauskasEmail: |
10.
Wojciech Jaśkowski Krzysztof Krawiec Bartosz Wieloch 《Genetic Programming and Evolvable Machines》2008,9(4):281-294
We provide the complete record of methodology that let us evolve BrilliAnt, the winner of the Ant Wars contest. Ant Wars contestants are virtual ants collecting food on a grid board in the presence
of a competing ant. BrilliAnt has been evolved through a competitive one-population coevolution using genetic programming
and fitnessless selection. In this paper, we detail the evolutionary setup that lead to BrilliAnt’s emergence, assess its
direct and indirect human-competitiveness, and describe the behavioral patterns observed in its strategy.
相似文献
Wojciech JaśkowskiEmail: |
Krzysztof Krawiec (Corresponding author)Email: |
Bartosz WielochEmail: |