14,703 research outputs found
Estudio sobre el diseño de observadores no lineales para reactores agitados y tubulares mediante la disipatividad = on the design of nonlinear dissipative observers for agitaded and tubular reactors /
No full text\ua0tesis que para obtener el grado de Doctor en Ingeniería Eléctrica, presenta Alexander Schaum ; asesor Jaime Alberto Moreno Pérez. 189 páginas :\ua0ilustraciones. Doctorado en Ingeniería Eléctrica\ua0UNAM, Instituto de Ingeniería,\ua0200
Open and closed-loop stochastic dynamics of a class of nonlinear chemical processes with multiplicative noise
No full textThe open and closed-loop global state probability density function behavior of a class of single-state nonlinear chemical processes subjected to additive and multiplicative white noises is characterized with analytic formulae through Fokker Planck (FP) theory, in terms of: (i) stationary state probability density function (PDF), (ii) PDF evolution along deterministic, diffusion, and escape time scales, (iii) conditions for PDF metastability along escape time scale, and (iv) dependency of PDF motion on deterministic dynamics. Comparing with noise additivity, multiplicativeness can yield similar or substantially different open-loop PDF evolution behavior. The application of control to an open-loop (possibly fragile and metastable) multimodal PDF yields a closed-loop robust monomodal PDF with mode regulation capability. The developments and findings are illustrated with numerical simulations of FP's PDE equation
Contribution to the knowledge of three species of the genus Thopeutica Schaum, 1861 from the Philippines (Coleoptera: Carabidae: Cicindelinae)
No full textAnichtchenko, Alexander, Medina, Milton Norman (2020): Contribution to the knowledge of three species of the genus Thopeutica Schaum, 1861 from the Philippines (Coleoptera: Carabidae: Cicindelinae). Zootaxa 4748 (2): 389-395, DOI: 10.11646/zootaxa.4748.2.1
Global-nonlinear stochastic dynamics of a class of two-state two-parameter non-isothermal continuous stirred tank reactors
No full textThe global-nonlinear stochastic dynamics of a class of two-state two-parameter continuous exothermic chemical reactors subjected to noise disturbances is studied with Fokker-Planck's (FP's) partial differential equation (PDE) theory. The dependency of the stochastic on deterministic dynamics is formally established, and the fundamental characteristics of the associated two-state probability density function (PDF) are described in analytic form, including: (i) stationary state PDF, (ii) convection, diffusion, and metastability time scales along which the state PDF transient occurs, as well as (iii) conditions for PDF metastability. The correspondence between the determination of stochastic stationary state PDF and the assessment of deterministic multiplicity via Van Heerden's (VH) diagram is established. The developments and results are illustrated with numerical solution of FP's PDE, and put in perspective with typical and atypical results drawn with Monte Carlo (MC) method
Tricondyla (Stenotricondyla) planiceps Schaum 1862
No full text<i>Tricondyla (Stenotricondyla) planiceps</i> Schaum, 1862: 18 <p>Loc. typ.: Mindanao (Naviaux, 2002). Holotype female in MNHU.</p> <p> <i>Trycondyla cyanipes</i> <i>planiceps</i> Schaum: in Horn, 1906: 33.</p> <p> <i>Tricondyla (Pseudotricondyla) planiceps</i> Schaum, 1862: in Naviaux, 2002:82.</p> <p> <b>Material.</b> LUZON: 2m: “N Luzon, Cagayan, x.2013 ” (DUBC); 1f: “ North Luzon, Nueva Viscaya, 7.2014” (DUBC); 1f: “ Philippines, N Luzon, Lohong, vi.12” (DUBC). MINDANAO: 1f: “ Philippines, Mindanao, Bukidnon, xi.2014 ” (DUBC). MINDORO: 1m: “ Philippines, Mt. Halcon, Mindoro, Jan. 2014 ” (DUBC).</p> <p> <b>Differential diagnosis</b>. Body size 14–16 mm. Black bright; habitus moderately elongated (Figs 96–98), remarkable by the narrowness of both neck and anterior part of pronotum; head broad in comparison, vertex long behind the eyes, inflated, obviously distinct from the neck by the presence of a transversal mark; temples rounded and feebly oblique; interocular cavity particularly shallow; the longitudinal grooves are not extended up to the transversal mark; pronotum long; medial lobe inflated in both dorsal and lateral views, but strongly narrowed in front; collum narrow; elytra widened with the lateral constriction clearly marked; gibbosity and concavity strongly marked; sculpture shallow in front, then finely punctate; apex smooth. Aedeagus (Fig. 127). Endophallus (Fig. 99). Protuberances: VB relatively small; BL pair, small and laterally protruding; DB relatively large and evidently biforked at apex; median part of endophallus elongated; V small, weakly delimited; VA relatively large; apical protuberances not studied; flagellum long and thin.</p> <p> <b>Distribution.</b> Philippines (Luzon, Mindanao, Mindoro).</p> <p> <b>Species to be removed from the list of Philippinean species</b></p>Published as part of <i>Anichtchenko, Alexander & Wiesner, Jürgen, 2024, Tiger beetles of the genus Tricondyla Latreille, 1822 (Coleoptera: Cicindelidae) of the Philippines, with some considerations of the taxonomy of the genus, pp. 351-376 in Zootaxa 5397 (3)</i> on pages 371-375, DOI: 10.11646/zootaxa.5397.3.3, <a href="http://zenodo.org/record/10468872">http://zenodo.org/record/10468872</a>
Dynamics of nonlinear chemical process with multiplicative stochastic noise
No full textMotivated by problems in process design, monitoring and control, the effect of multiplicative
stochastic uncertainty injection on the behavior of nonlinear dynamical system is studied with Fokker Abstract: Motivated by problems in process design, monitoring and control, the effect of multiplicative
Abstract: Motivated by problems in process design, monitoring and control, the effect of multiplicative Abstract: Motivated by problems in process design, monitoring and control, the effect of multiplicative Planck theory for two rather simple case examples selected to draw rigorous results with analytic stochastic uncertainty injection on the behavior of nonlinear dynamical system is studied with Fokker
stochastic uncertainty injection on the behavior of nonlinear dynamical system is studied with Fokker stochastic uncertainty injection on the behavior of nonlinear dynamical system is studied with Fokker formulae. The effect of noise multiplicativeness on the shape of the stationary state PDF and of the Planck theory for two rather simple case examples selected to draw rigorous results with analytic
Planck theory for two rather simple case examples selected to draw rigorous results with analytic Planck theory for two rather simple case examples selected to draw rigorous results with analytic transient one along deterministic, probability diffusion, and escape time scales is characterized. The formulae. The effect of noise multiplicativeness on the shape of the stationary state PDF and of the
formulae. The effect of noise multiplicativeness on the shape of the stationary state PDF and of the formulae. The effect of noise multiplicativeness on the shape of the stationary state PDF and of the findings are corroborated and illustrated with numerical simulations. The results provide insight to assist transient one along deterministic, probability diffusion, and escape time scales is characterized. The
transient one along deterministic, probability diffusion, and escape time scales is characterized. The transient one along deterministic, probability diffusion, and escape time scales is characterized. The the improvement of numerical Monte Carlo and polynomial chaos methods for stochastic multi-state findings are corroborated and illustrated with numerical simulations. The results provide insight to assist
findings are corroborated and illustrated with numerical simulations. The results provide insight to assist findings are corroborated and illustrated with numerical simulations. The results provide insight to assist multi-noise dynamical chemical processes underline by complex nonlinear behavior
FIGURES 13–14 in Contribution to the knowledge of three species of the genus Thopeutica Schaum, 1861 from the Philippines (Coleoptera: Carabidae: Cicindelinae)
No full textFIGURES 13–14. Habitus of Thopeutica (s.str.) wiesneri sp. n.: 13—holotype, male; 14—paratype, female.Published as part of Anichtchenko, Alexander & Medina, Milton Norman, 2020, Contribution to the knowledge of three species of the genus Thopeutica Schaum, 1861 from the Philippines (Coleoptera: Carabidae: Cicindelinae), pp. 389-395 in Zootaxa 4748 (2) on page 394, DOI: 10.11646/zootaxa.4748.2.11, http://zenodo.org/record/369873
FIGURES 10–12 in Contribution to the knowledge of three species of the genus Thopeutica Schaum, 1861 from the Philippines (Coleoptera: Carabidae: Cicindelinae)
No full textFIGURES 10–12. Labrum of Thopeutica spp. (a—males, b—females): 10—paralectotype of T. (s.str.) angulihumerosa; 11— holotype of T. (s.str.) juergenwiesneri syn. nov.; 12—holotype and paratype of T. (s.str.) wiesneri sp. nov.Published as part of Anichtchenko, Alexander & Medina, Milton Norman, 2020, Contribution to the knowledge of three species of the genus Thopeutica Schaum, 1861 from the Philippines (Coleoptera: Carabidae: Cicindelinae), pp. 389-395 in Zootaxa 4748 (2) on page 393, DOI: 10.11646/zootaxa.4748.2.11, http://zenodo.org/record/369873
Douglas Alexander Stewart, poet, author and playwright
No full textDouglas Alexander Stewart, poet, author and playwrigh
Author inscription in William Hazlitt, essayist and critic; selections from his writings, with a memoir, biographical and critical by Alexander Ireland
No full textAuthor's gift inscription, "To W. C. Hazlitt Esq with kind regards, from Alexr Ireland," with tipped-in review of the book.ASU Library edition has inscription from Ireland to Hazlitt [a child of William Hazlitt?].
Hazlitt , William, 1778-1830.
Ireland, Alexander, 1810-1894
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