173,199 research outputs found
Fuzzy shape classification exploiting geometrical and moments descriptors
No full textInstitute of Electrical and Electronics Engineers (IEEE) IEEE Computational Intelligence Society (CIS) National Chiao Tung University, Taiwan, R. O. C. National University of Tainan, Taiwan, R. O. C. National Cheng Kung University, Taiwan, R. O. C. Osaka Prefecture University, Japan
THERMAL MODELS FOR FRICTIONAL TORQUE CHARACTERISTIC IN DRY DUAL CLUTCH TRANSMISSIONS
No full textAutomated manual transmissions based on dry clutch are wide spreading in
modern automotive transmissions because of the possible improvements in
performance and comfort with respect to manual transmissions. A key issue for an efficient control of electro-actuated dry clutch transmissions is the knowledge of the clutch torque transmitted during the engagement. The torque transmitted by the clutch can be directly measured by means of setups which are difficult to be implemented in commercial products. Therefore it is fundamental to define an accurate torque transmissibility model to be exploited for the estimation of the clutch torque. A possible estimator is based on the inversion of the driveline dynamic model like showed by Gliemo et al. (2006) and by Amari et al. (2009), but the robustness of this type of estimation drastically depends on the availability of the system parameters and on clutch disk acceleration and engine torque measurements. As proposed by Vasca et al. (2008), a possible alternative consists in using an analytical model describing the friction phenomena and providing the torque transmitted by the clutch starting from the throwout bearing position. Unfortunately, the nominal characteristic (torque vs position) is influenced by several variables. Some of them, such as friction pads wear and diaphragm spring fatigue, have a “long term” effect, like showed by Mauro et al. (2002). Other variables have a direct influence also on each engagement maneuver. These variables, such as slipping speed, pressure, slipping acceleration and temperature affect the friction coefficient, as tested by Senatore et al. (2011), Feng et al. (2010) and by LuK (1996), and the normal force (D’Agostino et al., 2012) (Cappetti et al., 2012). The difficulties in representing the contributions of the different variables in the clutch torque transmissibility characteristic lead to the definition of corresponding lumped models, so as in the works of Myklebust et al. (2012;2013).
In this paper a temperature dependent torque transmissibility model for dry clutch transmissions is proposed. The model estimates the clutch torque by considering separately the influence of the slipping speed and temperature on the friction coefficient and the influence of the temperature on the normal force determined by the flat spring. In order to estimate the temperatures of interest, two thermal models of a dry dual clutch transmission with a central disk are proposed. The temperatures estimated by means of the proposed thermal models are then used for the analysis of open loop and closed loop operating conditions in a realistic dry dual clutch transmission
C. Valerius Triarius. Nota su un senatore della tarda Repubblica
No full textEsame della carriera, della famiglia e delle importanti relazioni di C. Valerius Triarius, un senatore della tarda età repubblicana originario di Fundi che, entrato in Senato durante la dittatura sillana, rimase fedele alla memoria di Silla combattendo dapprima in Sardegna contro il ribelle M. Emilio Lepido nel 77 a.C. e quindi militò agli ordini di L. Licinio Lucullo in Oriente dal 74/73 al 67 a.C
Discorsi di architettura del senatore Giovan Batista Nelli : con la vita del medesimo ... : e du ragionamenti sopra le cupole /
No full textPortrait of the author by A.F. Ceccherelli after Giuseppe Zocchi.Signatures: A-B⁸ C-L⁴.Errata: p. [1] at end.Cicognara,Mode of access: Internet
Disposizioni sull'emigrazione : *discorso del senatore F. Lampertico pronunziato in Senato nella tornata del 22 gennaio 1901
No full textDisposizioni sull'emigrazione : *discorso del senatore F. Lampertico pronunziato in Senato nella tornata del 22 gennaio 1901
Roma : Forzani e C. tipografi del Senato, 1901
20 p. ; 23 cm
Volatile components of aerial parts of Centaurea nigrescens an C. stenolepis growing wild in the Balkans
No full textThe volatile constituents of the aerial parts of Centaurea nigrescens Willd, collected in Romania and of two samples of C. stenolepis A. Kerner from Bulgaria and Romania were obtained by hydrodistillation and analyzed. The main components of C. stenolepis were caryophyllene oxide (6.9-15.6%), hexahydrofarnesyl acetone (6.5-4.4%), heptacosane (6.0-4.9%) and p-vinyl guiacol (4.3-5.0%). The main components of C. nigrescens were caryophyllene oxide (9.9%), β-eudesmol (9.5%), spathulenol (7.6%), heptacosane (6.1%) and p-vinyl guiacol (5.5%). The chemotaxonomic significance with respect to their colocation in Sections Lepteranthus and Nigrescentes, respectively, is discussed
Citizen Science and Gamification for Cultural Heritage
No full text[ES] Este artículo presenta un procedimiento aplicado al levantamiento de los monumentos arqueológicos y arquitectónicos basado en un modelo de gamificación. La metodología puede devolver automáticamente datos científicos (XYZ y RGB) aprovechando el potencial de sistemas de adquisición structure from motion. De esta manera pueden abrirse nuevas perspectivas para el conocimiento y la valorización del patrimonio cultural, tanto en términos de participación del usuario, que se convierte en coprotagonista en el conocimiento del bien, como en relación con la contención de los costos en comparación con los métodos anteriores de levantamiento. [EN] Focus of this article is a procedure of knowledge for Built Cultural Heritage based on a model of gamification applied to scientific survey of the monuments. Automatically, the methodology is able to return scientific data (xyz and rgB) exploiting the potential of structure from motion capture systems. This new approach opens up new perspectives for the understanding and appreciation of cultural heritage, both in terms of audience involvement, which becomes co-starred in the development of knowledge of architectural and archaeological sites, both with respect to cost containment than previous methods.Senatore, L.; Gallozzi, A.; Cigola, M.; Strollo, RM. (2020). Citizen Science y Gamification aplicados a los Bienes Culturales. EGA Expresión Gráfica Arquitectónica. 25(39):232-239. https://doi.org/10.4995/ega.2020.11586OJS2322392539BAMPATZIA S., BOURlAKOS I., ANTONIOU A., VASSIlAKIS C., lEPOURAS G., and WAllACE M., 2016. en Bottino R., Jeuring J., Veltkamp R. (eds) Games and learning Alliance. GAlA 2016. lecture notes in Computer Science, pp. 331-342. Cham: Springer. https://doi.org/10.1007/978-3-319-50182-6_30BUJARI, A., CIMAN, M., GAGGI, O. and PAlAZZI C., 2017. Using gamification to discover cultural heritage locations from geo-tagged photos. , 21, 235-252. https://doi.org/10.1007/s00779-016-0989-6.CLINI P., CERQUETTI M.G., BERTUCCIOLI l., INVERNIZZI l., and GASPARINI M., 2016. Integrated methodologies for the study, enhancement and sharing of archaeological heritage: the ArcheoFano project. 6(2), 81-92. https://doi.org/10.2423/i22394303v6n2p81GAllOZZI A. SENATORE l. and DE ROSA G., 2017. Territories and Frontier of Representation, pp. 699706. Roma: Gangemi.KOCH, U., 2019. Sharing Heritage Reflections after EYCH 2018 about the place of cultural heritage for future cooperation in Europe. SCIRES, 9(1), 33-40. DOI 10.2423/i22394303v9n1p33KONTOGIANNI, G., KOUTSAFTIS, C., SKAMANTZARI, M., CHRYSANTHOPOUlOU, C., and GEORGOPOUlOS, A., 2017. Utilising 3D Realistic Models in Serious Games for Cultural Heritage. 1(2), 21-46. https://doi. org/10.4018/IJCMHS.2017070102SMITH M.l., 2014. Citizen Science in Archaeology. American Antiquity, 4, 749-762. https://doi. org/10.7183/0002-7316.79.4.74
Sugli istituti d'emissione e sulla circolazione : risposta del ministro del tesoro all'interpellanza dell'on. senatore P. Vacchelli, 5 febbraio 1900
No full textSugli istituti d'emissione e sulla circolazione : risposta del ministro del tesoro all'interpellanza dell'on. senatore P. Vacchelli, 5 febbraio 1900
Roma : Forzani e C., 1900
32 p
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