共查询到20条相似文献,搜索用时 31 毫秒
1.
An efficient VLSI architecture and FPGA implementation of the Finite Ridgelet Transform 总被引:1,自引:0,他引:1
Shrutisagar Chandrasekaran Abbes Amira Shi Minghua Amine Bermak 《Journal of Real-Time Image Processing》2008,3(3):183-193
In this paper, an efficient architecture for the Finite Ridgelet Transform (FRIT) suitable for VLSI implementation based on
a parallel, systolic Finite Radon Transform (FRAT) and a Haar Discrete Wavelet Transform (DWT) sub-block, respectively is
presented. The FRAT sub-block is a novel parametrisable, scalable and high performance core with a time complexity of O(p
2), where p is the block size. Field Programmable Gate Array (FPGA) and Application Specific Integrated Circuit (ASIC) implementations
are carried out to analyse the performance of the FRIT core developed.
相似文献
Abbes AmiraEmail: |
2.
Laurent Houssin Sébastien Lahaye Jean-Louis Boimond 《Discrete Event Dynamic Systems》2007,17(2):159-178
This paper deals with just in time control of (max,+)-linear systems. The output tracking problem, considered in previous studies, is generalized by considering additional
constraints in the control objective. The problem is formulated as an extremal fixed point computation. This control is applied
to timetables computation for urban bus networks.
相似文献
Jean-Louis BoimondEmail: |
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.
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: |
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.
F. Essannouni R. Oulad Haj Thami D. Aboutajdine A. Salam 《Journal of Real-Time Image Processing》2007,1(4):257-265
Fast Fourier transforms (FFTs) which are O(N logN) algorithms to compute a discrete Fourier transform (DFT) of size N have been called one of the ten most important algorithms of the twentieth century. However, even though many algorithms
have been developed to speed up the computation the sum of absolute difference (SAD) matching, they are exclusively designed
in the spatial domain. In this paper, we propose a fast frequency algorithm to speed up the process of (SAD) matching. We
use a new approach to approximate the SAD metric by cosine series which can be expressed in correlation terms. These latter
can be computed using FFT algorithms. Experimental results demonstrate the effectiveness of our method when using only the
first correlation terms for block and template matching in terms of accuracy and speed. The proposed algorithm is suitable
for software implementations and has a deterministic execution time unlike the existing fast algorithms for SAD matching.
相似文献
A. SalamEmail: |
7.
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: |
8.
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: |
9.
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: |
10.
One of the tropes of the age of ubiquitous computing is the migration of computation into new spaces. Domestic environments
have been a particular focus of attention for many. However, these spaces are neither empty nor neutral. They are already
populated by people and practices which shape both their physical form and cultural meaning. We want to consider here some
questions of technology and domesticity. In order to give some critical perspective, we want to approach domestic space from
the edge, and in particular, from the shed.
相似文献
Genevieve Bell (Corresponding author)Email: |
Paul DourishEmail: |
11.
Connecting the family with awareness systems 总被引:1,自引:1,他引:0
Natalia Romero Panos Markopoulos Joy van Baren Boris de Ruyter Wijnand IJsselsteijn Babak Farshchian 《Personal and Ubiquitous Computing》2007,11(4):299-312
Awareness systems have attracted significant research interest for their potential to support interpersonal relationships.
Investigations of awareness systems for the domestic environment have suggested that such systems can help individuals stay
in touch with dear friends or family and provide affective benefits to their users. Our research provides empirical evidence
to refine and substantiate such suggestions. We report our experience with designing and evaluating the ASTRA awareness system,
for connecting households and mobile family members. We introduce the concept of connectedness and its measurement through
the Affective Benefits and Costs of communication questionnaire (ABC-Q). We inform results that testify the benefits of sharing
experiences at the moment they happen without interrupting potential receivers. Finally, we document the role that lightweight,
picture-based communication can play in the range of communication media available.
相似文献
Natalia Romero (Corresponding author)Email: |
Panos MarkopoulosEmail: |
Joy van BarenEmail: |
Boris de RuyterEmail: |
Wijnand IJsselsteijnEmail: |
Babak FarshchianEmail: |
12.
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: |
13.
Erik Melin 《Journal of Mathematical Imaging and Vision》2009,33(3):267-280
We consider different possibilities to define digital manifolds that are locally homeomorphic to Khalimsky n-space. We prove existence and non-existence of certain types of Khalimsky manifolds. An embedding theorem is proved.
We introduce the join operator and use it to analyze the structure of adjacency neighborhoods and of intersections of neighborhoods
in ℤ
n
.
相似文献
Erik MelinEmail: |
14.
There are only a few ethical regulations that deal explicitly with robots, in contrast to a vast number of regulations, which
may be applied. We will focus on ethical issues with regard to “responsibility and autonomous robots”, “machines as a replacement
for humans”, and “tele-presence”. Furthermore we will examine examples from special fields of application (medicine and healthcare,
armed forces, and entertainment). We do not claim to present a complete list of ethical issue nor of regulations in the field
of robotics, but we will demonstrate that there are legal challenges with regard to these issues.
相似文献
Michael Nagenborg (Corresponding author)Email: URL: www.michaelnagenborg.de |
Rafael CapurroEmail: |
Jutta WeberEmail: |
Christoph PingelEmail: |
15.
An Efficient Modular Method for the Control of Concurrent Discrete Event Systems: A Language-based Approach 总被引:1,自引:1,他引:0
In this paper, we are interested in the control of a particular class of Concurrent Discrete Event Systems defined by a collection
of components that interact with each other. We investigate the computation of the supremal controllable language contained
in the language of the specification. We do not adopt the decentralized approach. Instead, we have chosen to use a modular
centralized approach and to perform the control on some approximations of the plant derived from the behavior of each component.
The behavior of these approximations is restricted so that they respect a new language property for discrete event systems
called partial controllability condition that depends on the specification. It is shown that, under some assumptions, the intersection of these “controlled approximations”
corresponds to the supremal controllable language contained in the specification with respect to the plant. This computation
is performed without having to build the whole plant, hence avoiding the state space explosion induced by the concurrent nature
of the plant. It is finally shown that the class of specifications on which our method can be applied strictly subsumes the
class of separable specifications.
相似文献
Hervé MerchandEmail: |
16.
The Stanford Event Heap has been shown to provide appropriate support for constructing interactive workspace applications.
Given this success it is natural to consider the Event Heap as a platform to support other classes of Ubiquitous Computing
applications. In this paper we argue that the distributed, spontaneous nature of these applications places additional demands
on the Event Heap that require extensions to both the engineering and API. Suitable extensions are described and their use
to support a typical Ubicomp application is discussed.
相似文献
Oliver Storz (Corresponding author)Email: |
Adrian FridayEmail: |
Nigel DaviesEmail: |
17.
Research on hybrid bionic systems (HBSs) is still in its infancy but promising results have already been achieved in laboratories.
Experiments on humans and animals show that artificial devices can be controlled by neural signals. These results suggest
that HBS technologies can be employed to restore sensorimotor functionalities in disabled and elderly people. At the same
time, HBS research raises ethical concerns related to possible exogenous and endogenous limitations to human autonomy and
freedom. The analysis of these concerns requires reflecting on the availability of scientific models accounting for key aspects
of sensorimotor coordination and plastic adaptation mechanisms in the brain.
相似文献
Pericle Salvini (Corresponding author)Email: |
Edoardo DatteriEmail: |
Cecilia LaschiEmail: |
Paolo DarioEmail: |
18.
19.
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: |
20.
Ohne Zusammenfassung
相似文献
Peter Rohner (Corresponding author)Email: |
Robert Winter (Corresponding author)Email: |