114,218 research outputs found
Control and Filtering for Discrete Linear Repetitive Processes with H infty and ell 2--ell infty Performance
No full textRepetitive processes are characterized by a series of sweeps, termed passes, through a set of dynamics defined over a finite duration known as the pass length. On each pass an output, termed the pass profile, is produced which acts as a forcing function on, and hence contributes to, the dynamics of the next pass profile. This can lead to oscillations which increase in amplitude in the pass to pass direction and cannot be controlled by standard control laws. Here we give new results on the design of physically based control laws for the sub-class of so-called discrete linear repetitive processes which arise in applications areas such as iterative learning control. The main contribution is to show how control law design can be undertaken within the framework of a general robust filtering problem with guaranteed levels of performance. In particular, we develop algorithms for the design of an H? and dynamic output feedback controller and filter which guarantees that the resulting controlled (filtering error) process, respectively, is stable along the pass and has prescribed disturbance attenuation performance as measured by and – norms
A boundary element model for nonlinear viscoelasticity
No full textThe boundary element methodology is applied to the analysis of non-linear viscoelastic solids. Theadopted non-linear model uses the same relaxation moduli as the respective linear relations but with a time shiftdepending on the volumetric strain. Nonlinearity introduces an irreducible domain integral into the originalintegral equation derived for linear viscoelastic solids. This necessitates the evaluation of domain strains, whichrelies on proper differentiation of an integral with a strong kernel singularity. A time domain formulation isimplemented through a numerical integration algorithm. The effectiveness of the developed numerical tool isdemonstrated through the analysis of a plate with a central crack. The results are compared with respectivepredictions by the finite element metho
O pułapce „skojarzeniowej” w humanistyce. (Na marginesie uroszczenia S. Gałkowskiego w jego próbie „logicznej” wykładni Znanieckiego)
Full text linkAutor polemiki we wstępie wskazuje na zjawisko "reductio ad absurdum" koncepcji Znanieckiego w wykładni adresata jego krytyki. Dalej jest zarysowana ogólna perspektywa sprzeciwu wobec podejścia Stanisława Gałkowskiego. Przedstawiono także krytycyzm i pochwały wobec Znanieckiego ze strony autora polemiki. W tekście wskazuje się na pułapkę czytania epistemicznego jako etyczne nadużycie logiki. Wreszcie, zamiast zakończenia, mówi się o traktowaniu tradycji myśli humanistycznej i uczula na błędy interpretacyjne popełnione przez krytykowanego autora. Główny błąd polega na skojarzeniach czytelnika blokujących mu głębszy dostęp do znaczenia czytanej koncepcji.In his introduction the author of this polemic indicates the phenomenon of "reductio ad absurdum" of Znaniecki's conception in the exegesis of the addressee of this criticism. Next there is an outline sketched concerning the general perspective of disagreement against the approach by S. Gałkowski. There is also outlined criticism and appraisal towards Znaniecki by the author of this polemics. The text illustrates the trap of an epistemic reading as an ethical abuse of logics. Finally instead of a conclusion one is discussing the ways of treatement of the tradition of humanistic reflection and it warns against interpretative errors committed by the criticised author. The basic error is perceived as the result of domination of application of harmful associations of the leader blocking the way to deeper sense of the conception
Cidariplura maraho Wu & Owada 2013
No full textCidariplura maraho Wu & Owada, 2013 (Figs 15, 16, 33, 42, 52) Cidariplura maraho Wu & Owada, in Wu et al., 2013: 151, figs 14–16, 41, 42, 62, 73, 82. Type material. Holotype, ♂, Taiwan, Nantou County, Meifeng, 2,100 m, 29. VI. 2012, TFRI147244 S. Wu & W. C. Chang leg. (TFRI) (Fig. 15). Paratypes (9♂ 4♀): the same collecting locality as that of holotype, 1♂, 18. VII. 1990, TFRI00010165, Y. C. Chang leg.; the same locality, 3♂, 20. VII. 2011, TFRI00128724 ♂, S. Wu & W. C. Chang leg. (TFRI); Hualien, Ci’en, 1,950 m, 2♂, 28. VI. 2011, S. Wu & W. C. Chang leg.; the same locality, 1♂, 18. VII. 2011, S. Wu & W. C. Chang leg. (TFRI); Pilu-Shenmu, 2,000 m, 1♀, 16.VII. 2012, M. Owada & L. C. Shih leg. (ESRI); Nantou, Biluxi, 1♂, 12. VII. 2011, C. M. Fu leg.; Turnyuan, 1♀, 23. VI. 2007, 1,950 m, C. M. Fu leg. (NMNS); Taichung, Wuling, 1,850 m, 1♀, 10–12. VIII. 1990, M. Owada leg. (NSMT); Hualien, Tsu’en, 1,990 m, 1♂, 26. VI. 1989, M. Owada leg. (NSMT); Nantou, Hotso [Lushan Spa], 1♀, 26–29. VI. 1973, M. Owada leg. (NSMT). Additional material examined (2♂ 2♀). Hualien, Tsu’en, 2,000 m, 1♀, 13. VII. 2015, NSMT3284 ♀, M. Owada & L. Shih leg. (NSMT); Nantou, Sunlinksea, 1,700 m, 1♂, 25. VI. 2017, NSMT3283 ♂, M. Owada & L. Shih leg. (NSMT); Kaohsiung, Tianchi-2, 2,280 m, 1♂ 1♀, 6. VII. 2015, M. Owada & C.-M. Fu leg. (NSMT). Diagnosis. The species is easily distinguished from other species in C. gladiata complex due to the paler ground coloration of the wings and the more contrasting forewing medial region, the less curved transversal lines on both wings, and the medial part of the corpus bursae, which is incised with longitudinal wrinkles. Distribution and phenology. Endemic to Taiwan. The adults occur from June to August.Published as part of Wu, Shipher, Owada, Mamoru & Wang, Min, 2019, Review of Cidariplura Butler, 1879 (Lepidoptera, Erebidae, Herminiinae). Part 1: the Cidariplura gladiata species complex, pp. 489-502 in Zootaxa 4668 (4) on page 496, DOI: 10.11646/zootaxa.4668.4.3, http://zenodo.org/record/344986
Design for Feedback Systems With Plant Input Amplitude and Rate Saturation
No full text(1), pp. and extensions developed in (Wu, W., and Jayasuriya, S., 1999, Proceedings of American Control Conference, San Diego, CA, pp. 3046-3050; Wu, W., and Jayasuriya, S., 2001, ASME J. Dyn. Syst., Meas., Control, 12
Movement planning under risk differs from decision making under risk in how subjects make use of probability information.
No full textTrommershäuser, Maloney & Landy (JOSA, 2003) studied performance in tasks that were formally equivalent to decision making under risk. They found that subjects' planned movements nearly maximized expected gain, a result inconsistent with the decision making literature. Here we replicated a decision making experiment (Wu & Gonzalez, Management Science,1996) that tested whether subjects correctly use probability information in choosing between lotteries. We replicate the original experiment with the probabilities of outcomes explicitly given in the lotteries and we also replicated the experiment with each lottery translated into an equivalent motor task (“motor lottery”) where the probability of each outcome is implicit in movement uncertainty. We will describe how we measured subjects' movement uncertainty and designed an equivalent motor lottery for any given lottery. Each subject ran the implicit and explicit conditions in counterbalanced order. Task: On each trial in both conditions subjects indicated which lottery/motor lottery they preferred (2AFC). They knew that, at the end of the experiment, they would be allowed to attempt only one of their preferred explicit lotteries and one of their preferred implicit motor lotteries chosen at random and receive the outcome. Results: All subjects failed to correctly use probability information or maximize expected gain in the explicit condition, consistent with Wu & Gonzalez. Five out of eight of these subjects made choices consistent with maximizing expected gain in the implicit (motor lottery) condition. The results indicate that planning rapid movements differs qualitatively from classical decision making in how subjects make use of probability information
Rome. The Centre(s) Elsewhere
No full textRome: The Centre(s) Elsewhere is the result of a Berlage Institute postgraduate studio led by Pier Vittorio Aureli and Martino Tattara, in collaboration with Gabriele Mastrigli. The book proposes both the definition of a new urban strategy for the city of Rome and a critical framework through which to understand the city’s history. Going beyond the grandeur of the past and the uncertainty of the present, Rome: The Centre(s) Elsewhere offers a project for the city’s possible future by reclaiming the greatest and yet currently neglected asset of its urban structure: the consular roads system. The book is a critical and concise pamphlet about urban design and the project of the city. It represents an attempt to gather into one approach the issues of large-scale design, political thinking, and urban history. The publication is based on a research at the Berlage Institute Rotterdam entitled Rome: The Centre(s) Elsewhere, which took place during the 2008–2009 academic year. The research was presented first at The Berlage Institute in Rotterdam then in an international conference and an exhibition entitled Rome: The Centre(s) Elsewhere, held at the Casa dell’Architettura from 9 June to 7 July 2010 and organized as part of the Festa dell’Architettura of Rome 2010. Together with being co-curator of the research exhibition, Gabriele Mastrigli is author of the exhibition design
Frisilia anningensis Wu 1997
No full text16. Frisilia anningensis Wu, 1997 Acta Zootaxonomica Sinica, 22 (1): 87, Fig. 2. TL: China, Yünnan. [IZAS, China]. Diagnosis. The species is similar to F. s u l c a t a Meyrick, which was described from N. India, and it is characterized by the male genitalia with a small spine on the ventral margin of the valva, and extremely emarginated on the caudal margin of the juxta. The female is as yet unknown. Adult (Fig. 17, holotype). Wingspan, 19.0 mm. Male genitalia (Figs. 48, 48 a). See Wu (1997 a: Fig. 2). Material examined. 1 ♂ (holotype), Prov. Yunnan, 16 VIII 1982, gen. prep. no. IZAS-W 89178. Distribution. China.Published as part of Park, Kyu-Tek, Wu, Chunseng, Kun, Andras & Sohn, And Jae-Cheon, 2008, A taxonomic review of the genus Frisilia Walker (Lepidoptera: Lecithoceridae), with description of two new species, pp. 1-24 in Zootaxa 1696 on page 10, DOI: 10.5281/zenodo.18072
Frisilia anningensis Wu 1997
No full text16. Frisilia anningensis Wu, 1997 Acta Zootaxonomica Sinica, 22 (1): 87, Fig. 2. TL: China, Yünnan. [IZAS, China]. Diagnosis. The species is similar to F. s u l c a t a Meyrick, which was described from N. India, and it is characterized by the male genitalia with a small spine on the ventral margin of the valva, and extremely emarginated on the caudal margin of the juxta. The female is as yet unknown. Adult (Fig. 17, holotype). Wingspan, 19.0 mm. Male genitalia (Figs. 48, 48 a). See Wu (1997 a: Fig. 2). Material examined. 1 ♂ (holotype), Prov. Yunnan, 16 VIII 1982, gen. prep. no. IZAS-W 89178. Distribution. China.Published as part of Park, Kyu-Tek, Wu, Chunseng, Kun, Andras & Sohn, And Jae-Cheon, 2008, A taxonomic review of the genus Frisilia Walker (Lepidoptera: Lecithoceridae), with description of two new species, pp. 1-24 in Zootaxa 1696 on page 10, DOI: 10.5281/zenodo.18072
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