排序方式: 共有6条查询结果,搜索用时 15 毫秒
1
1.
Amaryllis Audenaert Herbert Peremans Genserik Reniers 《Journal of Engineering Mathematics》2007,59(3):323-336
This paper proposes an analytical elasto–plastic model to describe the behavior of arches. The modeling is carried out using
the equations of (i) horizontal equilibrium, (ii) vertical equilibrium and (iii) equilibrium of moments. The latter equations
of equilibrium are ordinary differential equations which can easily be solved by adding boundary conditions, imposing restrictions
on the horizontal and vertical movement and on the rotation in the abutments of the arch. For masonry arches, including material
properties allowing the occurrence of cracks and the subsequent formation of hinges is required. The latter theory has been
implemented in a computer program (Matlab), offering numerical simulations. The software was used to illustrate two case-studies,
i.e., the assessment of an arch loaded with a vertical point load and one with a horizontal point load. 相似文献
2.
George Caridakis Amaryllis Raouzaiou Elisabetta Bevacqua Maurizio Mancini Kostas Karpouzis Lori Malatesta Catherine Pelachaud 《Language Resources and Evaluation》2007,41(3-4):367-388
This work is about multimodal and expressive synthesis on virtual agents, based on the analysis of actions performed by human
users. As input we consider the image sequence of the recorded human behavior. Computer vision and image processing techniques
are incorporated in order to detect cues needed for expressivity features extraction. The multimodality of the approach lies
in the fact that both facial and gestural aspects of the user’s behavior are analyzed and processed. The mimicry consists
of perception, interpretation, planning and animation of the expressions shown by the human, resulting not in an exact duplicate
rather than an expressive model of the user’s original behavior. 相似文献
3.
Amaryllis Audenaert Liesje De Boeck Sven De Cleyn Sebastien Lizin Jean-François Adam 《Renewable Energy》2010,35(12):2674-2682
In this paper an economic evaluation of photovoltaic grid connected systems (PVGCS) for companies situated in Flanders (Belgium) is conducted by using a generic Excel model. The model is unique in that it includes the dimension of taxation. This inclusion is required, otherwise the fiscal benefit of using solar panels is not accounted for. The model uses the cash flow projection method. This technique allows the calculation of the following classical evaluation criteria: net present value, internal rate of return, payback period, discounted payback period, profitability index, yield unit cost, yield unit revenue and break-even turnkey cost. Their outcome makes it possible to answer the question whether installing a PVGCS in Flanders is a responsible financial investment for companies. Furthermore, the paper estimates whether the corporate environment is ready for a subsidy legislation change. This change has recently been announced and as such it is possible to gauge whether the current market situation is profitable given future legislation. 相似文献
4.
Both a self-management approach, teaching the principles of behavior modification and self-control (n = 36), and a group discussion technique, involving discussion of study habits and problems (n = 41), led to improvements in GPAs compared with a no-treatment control group (n = 36) for low-achieving junior high school students. Ss in both treatment groups reported improvement in their academic abilities relative to those of other junior high school students after the program. More than those in the group discussion condition, those in the self-management group also reported that they were more likely to have a specific time and place to study and that the program had increased their efficiency and time spent studying. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
5.
L. Malatesta A. Raouzaiou K. Karpouzis S. Kollias 《Personal and Ubiquitous Computing》2009,13(1):77-83
The current work will describe an approach to synthesize expressions, including intermediate ones, via the tools provided
in the MPEG-4 standard based on real measurements and on universally accepted assumptions of their meaning, taking into account
results of Whissel’s study. Additionally, MPEG-4 facial animation parameters are used in order to evaluate theoretical predictions
for intermediate expressions of a given emotion episode, based on Scherer’s appraisal theory. MPEG-4 FAPs and action units
are combined in modeling the effects of appraisal checks on facial expressions and temporal evolution issues of facial expressions
are investigated. The results of the synthesizing process can then be applied to Embodied Conversational Agents (ECAs), rendering
their interaction with humans, or other ECAs, more affective. 相似文献
6.
Towards modeling embodied conversational agent character profiles using appraisal theory predictions in expression synthesis 总被引:2,自引:2,他引:0
Appraisal theories in psychology study facial expressions in order to deduct information regarding the underlying emotion
elicitation processes. Scherer’s component process model provides predictions regarding particular face muscle deformations
that are attributed as reactions to the cognitive appraisal stimuli in the study of emotion episodes. In the current work,
MPEG-4 facial animation parameters are used in order to evaluate these theoretical predictions for intermediate and final
expressions of a given emotion episode. We manipulate parameters such as intensity and temporal evolution of synthesized facial
expressions. In emotion episodes originating from identical stimuli, by varying the cognitive appraisals of the stimuli and
mapping them to different expression intensities and timings, various behavioral patterns can be generated and thus different
agent character profiles can be defined. The results of the synthesis process are consequently applied to Embodied Conversational
Agents (ECAs), aiming to render their interaction with humans, or other ECAs, more affective. 相似文献
1