In this work, an alternative solution to the tracking problem for a SISO nonlinear dynamical system exhibiting points of singularity is given. An inversion-based controller is synthesized using the Fliess generalized observability canonical form associated to the system. This form depends on the input and its derivatives. For this purpose, a robust exact differentiator is used for estimating the control derivatives signals with the aim of defining a control law depending on such control derivative estimates and on the system state variables. This control law is such that, when applied to the system, bounded tracking error near the singularities is guaranteed.
The aim of the paper is to argue that the ontological setting of objects in Wittgenstein’s Tractatus is a version of structural realism. According to our plan, one of the opening statements of the Tractatus - The world is the totality of facts, not of things - introduces structuralist perspective: structures are superior to their constituents. However, structuralists use the notion ''superior'' in various senses, but this paper argues that the Tractatus places its objects within the framework of ontic structural realism in its moderate form. That form puts structures and individuals on the same ontological footing. Such thesis contradicts traditional object-ontology that dominates Tractarian literature., Cílem práce je argumentovat, že ontologické nastavení objektů ve Wittgensteinově Tractatus je verzí strukturálního realismu. Podle našeho plánu, jeden z úvodních výroků Tractatus - Svět je souhrn faktů, ne věcí - zavádí strukturalistickou perspektivu: struktury jsou nadřazené jejich složkám. Nicméně, strukturalisté používají pojem ''nadřazený'' v různých smyslech, ale tento papír argumentuje, že Tractatus umístí jeho objekty uvnitř rámce ontic strukturálního realismu v jeho mírné formě. Tato forma staví struktury a jednotlivce na stejné ontologické základy. Tato práce je v rozporu s tradiční objektovou ontologií, která dominuje v literární literatuře., and Martin Schmidt
ISTC ih00271000, Červené iniciály a rubriky. Vynechaná místa na iniciály s reprezentantami., and Rukopisné přípisky, podtrhání, svorky a ukazovací ručičky v textu.
Seedling recruitment is a critical developmental stage in regeneration of plant populations under Mediterranean conditions that strongly depends on water availability. Seed mass and relative growth rate (RGR) may affect the early establishment of seedlings through different physiological processes. Here, we examined the effects of the seed mass and carbon balance on seedling growth under two water regimes in Rhamnus alaternus L. and Rhamnus ludovici-salvatoris, two Mediterranean shrubs, showing a different ability to recruit seedlings. Plant water consumption and biomass accumulation (ΔB) were measured during three periods of the growth in order to estimate water use efficiency (WUE), RGR, and its components. Additionally, net photosynthesis and leaf, stem, and root respiration were measured in plants grown in pots well watered and under progressive drought. Rhamnus alaternus showed the higher seed mass, ΔB, and plant WUE than that of R. ludovici-salvatoris in all periods and water regimes. The higher RGR of R. alaternus was observed during the first and the second period, but the reverse trend was registered during the third period as a consequence of the higher initial biomass of R. alaternus. Also, R. alaternus showed a higher specific leaf area and estimated carbon balance than that of R. ludovicisalvatoris. The observed differences in ΔB, estimated carbon balance, seed mass, and WUE between both species could explain their different distribution and ability to recruit seedlings under natural conditions., H. El Aou-Ouad, I. Florez-Sarasa, M. Ribas-Carbó, J. Flexas, H. Medrano, J. Gulías., and Obsahuje seznam literatury