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Intensity-curvature functional based digital high pass filter of the bivariate cubic B-spline model polynomial function

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Visual Computing for Industry,Biomedicine,and Art 2019年第1期2卷 75-92页

作者： carlo Ciulla Grace Agyapong Faculty of Information Systems VisualizationMultimediaand AnimationUniversity of Information Science and TechnologySt.Paul the ApostlePartizanska B.B.Ohrid 6000Republic of North Macedonia Faculty of Communication Networks and Security University of Information Science and TechnologySt.Paul the ApostlePartizanska B.B.Ohrid 6000Republic of North Macedonia

This research addresses the design of intensity-curvature functional(ICF)based digital high pass filter(HPF).ICF is calculated from bivariate cubic B-spline model polynomial function and is called ICF-based *** order to calculate ICF,the model function needs to be second order differentiable and to have non-null classic-curvature calculated at the origin(0,0)of the pixel coordinate *** theoretical basis of this research is called intensitycurvature *** concept envisions to replace signal intensity with the product between signal intensity and sum of second order partial derivatives of the model *** of the concept in two-dimensions(2D)makes it possible to calculate the ICF of an *** treatise is presented to demonstrate the hypothesis that ICF is HPF *** evidence then validates the assumption and also extends the comparison between ICF-based HPF and ten different HPFs among which is traditional HPF and particle swarm optimization(PSO)based *** comparison of image space and k-space magnitude,results indicate that HPFs behave *** HPF filtering and ICF-based filtering are superior to PSO-based *** filtered with traditional HPF are sharper than images filtered with ICF-based *** contribution of this research can be summarized as follows:(1)Math description of the constraints that ICF need to obey to in order to function as HPF;(2)Math of ICF-based HPF of bivariate cubic B-spline;(3)Image space comparisons between HPFs;(4)K-space magnitude comparisons between *** research provides confirmation on the math procedure to use in order to design 2D HPF from a model bivariate polynomial function.

关键词： Intensity-curvature functional High pass filter B-spline Particle swarm optimization K-space

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DZ Lyn:a contact binary with components in poor thermal contact

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Research in Astronomy and Astrophysics 2009年第11期9卷 1270-1276页

作者： Massimiliano Martignoni Francesco Acerbi carlo Barani Via Don G. Minzoni 26/D 20020 Magnago(MI)Italy Via Zoncada 51 26845 Codogno(LO)Italy Via Molinetto 35 26845 Triulza di Codogno(LO)Italy

CCD photometric observations of the short-period eclipsing binary DZ Lyn were obtained during seven nights in March-April 2008 in the B, V, Rc and Ic bands; these observations confirm the short-period （P = 0.378 d） of the system. The presented light curves are analyzed by means of the 2003 version of the Wilson-Devinney （WD） program. A grid of solutions for several fixed values of mass ratio was calculated. The best fitting possible is for a mass ratio of q -- 0.885, a degree of contact f = 0.18 and a low orbital inclination of i = 57.6°. The results show that DZ Lyn is an A-subtype W Ursae Majoris contact binary in poor thermal contact; in fact the difference between the mean temperatures of the components is about 1800 K. The star DZ Lyn seems to be another member of the class of poorly understood close binaries in or near geometrical contact but far from thermal contact. The absolute dimensions are estimated and its dynamical evolution is inferred.

关键词： binaries eclipsing -- stars fundamental parameters -- stars individual DZ Lyn

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Modelling Strategy and Parametric Study of Metal Gaskets for Automotive Applications

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Computer Modeling in Engineering & Sciences 2020年第10期125卷 51-64页

作者： Fabio Bruzzone Cristiana Delprete carlo Rosso Politecnico di Torino Corso Duca degli Abruzzi 24Torino10129Italy

This paper is focused on finite element simulation of cylinder head *** element codes support several methodologies,each of which has its own strengths and *** of the key points lies in the influence of the gasket geometry on its final *** a contribution can come from the detailed modelling of the gasket or by defining a global non-linear behaviour in which material and geometry non-linearities are *** approaches were used to simulate the gasket *** first one consists in using a 2D approach,which allows to model through-thickness non-linear behaviour of *** second one consists in using conventional 3D finite element *** numerical methods have been discussed and compared in relation to the accordance with experimental data,amount of information supplied and computational time ***,a parametric study shows how some geometric parameters influence the compressive load and the elastic recovery of a single-layer steel gasket.

关键词： Gaskets finite elements parametric study

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BACE1 role in Alzheimer’s disease and other dementias:from the theory to the practice

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Neural Regeneration Research 2021年第12期16卷 2407-2408页

作者： carlo Cervellati Giuseppe Valacchi Giovanni Zuliani Department of Translational Medicine and for Romagna University of FerraraFerraraItaly Department of Biomedical and Specialist Surgical Sciences University of FerraraFerraraItalyPlants for Human Health InstituteAnimal Science DepartmentNC State UniversityKannapolisNCUSA

Beta-site amyloid precursor protein(APP)cleaving enzyme-1(BACE1):brief overview on the biology and its role in Alzheimer’s disease(AD)pathogenesis:AD is a multifactorial and multifaceted disease,with a complex and still not completely understood pathogenesis(Cervellati et al.,2016;Iturria-Medina et al.,2016).Multiple hypotheses have been proposed to explain the pathobiology of the disease.

关键词： BACE1 Alzheimer al.

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OxInflammation in Alzheimer's disease

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Neural Regeneration Research 2023年第12期18卷 2709-2710页

作者： carlo Cervellati Giovanni Zuliani Giuseppe Valacchi Department of Translational Medicine and for Romagna University of FerraraFerraraItaly Department of Environmental Sciences and Prevention University of FerraraFerraraItaly Plants for Human Health Institute Animal Science DepartmentNC State UniversityKannapolisNCUSA Department of Food and Nutrition Kyung Hee UniversitySeoulSouth Korea

Oxlnflammation:definition and role in disease:Oxlnflammation has been introduced as a new term in the biomedical field to highlight the deep and mutual relationship between the dysregulation of redox and immune homeostasis(Valacchi et al.,2018).Regardless of which is the initial spark,inflammation cannot take place without a concomitant oxidative stress response and *** other words,they are sides of the same coin.

关键词： al. homeostasis inflammation

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Why did life develop on the surface of the Earth in the Cambrian？

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Geoscience Frontiers 2016年第6期7卷 865-873页

作者： carlo Doglioni Johannes Pignatti Max Coleman Department of Earth Sciences Sapienza University 00185 Rome Italy NASA Jet Propulsion Laboratory California Institute of Technology Pasadena CA 91109 USA NASA Astrobiology Institute USA

Life was limited for most of Earth＇s history, remaining at a primitive stage and mostly marine until about 0.55 Ga. In the Paleozoic, life eventually exploded and colonized the continental realm. Why had there been such a long period of delayed evolution of life？ Early life was dominated by Archaea and Bacteria, which can survive ionizing radiation better than other organisms. The magnetic field preserves the atmosphere, which is the main shield of UV radiation. We explore the hypothesis that the Cambrian explosion of life could have been enabled by the increase of the magnetic field dipole intensity due to the solidification of the inner core, caused by the cooling of the Earth, and the concomitant decrease with time of the high-energy solar flux since the birth of the solar system. Therefore, the two phenomena could be responsible for the growth and thickening of the atmosphere and the development of land surface life.

关键词： Origin of lifeInner core solidificationSolar ionizing radiations

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The promise of neuroprotection by dietary restriction in glaucoma

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Neural Regeneration Research 2022年第1期17卷 45-47页

作者： Rossella Russo carlo Nucci Annagrazia Adornetto Preclinical and Translational Pharmacology Department of PharmacyHealth and Nutritional SciencesUniversity of CalabriaRendeItaly Ophthalmology Unit Department of Experimental MedicineUniversity of Rome Tor VergataRomeItaly

Glaucoma,a progressive age-related optic neuropathy characterized by the death of retinal ganglion cells,is the most common neurodegenerative cause of irreversible blindness *** therapeutic management of glaucoma,which is limited to lowering intraocular pressure,is still a challenge since visual loss progresses in a significant percentage of treated *** dietary regimens have received considerable attention as adjuvant strategy for attenuating or delaying the progression of neurodegenerative *** we discuss the literature exploring the effects of modified eating patterns on retinal aging and resistance to stressor stimuli.

关键词： aging caloric restriction fasting glaucoma neurodegeneration retina retinal ganglion cells

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Photometric study and preliminary elements of the low-mass ratio W UMa system ASAS 021209+2708.3

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Research in Astronomy and Astrophysics 2011年第7期11卷 843-850页

作者： Francesco Acerbi carlo Barani Massimiliano Martignoni Via Zoncada 51 26845 Codogno(LO)Italy Via Molinetto 35 26845 Triulza di Codogno(LO)Italy Via Don G.Minzoni 26/D 20020 Magnago(MI)Italy

We present CCD B and V light curves,obtained in the year 2006,and a photometric solution of the low-mass ratio contact binary ASAS 021209＋2708.3. With our data we were able to determine six new times of minimum light and refine the orbital period of the system to 0.3181963 *** light curves are analyzed using the 2003 version of the Wilson-Devinney program and the analysis was performed with and without adding a spot on the surface of one star because the light curves appear to exhibit a typical O’Connell effect,with Maximum I brighter than Maximum *** results show that ASAS 021209＋2708.3 may be classified as an A-subtype W Ursae Majoris system with a small mass ratio q=0.1889,a large over-contact degree of f= 0.587,a very small difference between the component temperatures of Δ T=53 K and an orbital inclination of i=81°.It is known that deep（f50%） ,low-mass ratio（q0.25） overcontact binary stars are a very important resource for understanding the phenomena of Blue Straggler/FK Com-type *** formations of Blue Straggler stars and FK Com-type stars are unsolved problems in stellar *** of the possible explanations for their formation is from the coalescence of W UMa-type overcontact binary *** absolute dimensions of ASAS 021209＋2708.3 are estimated and its dynamical evolution is inferred.

关键词： binaries:eclipsing–stars:fundamental parameters–stars:individual:ASAS 021209+2708.3

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Control of systems with sector-bounded nonlinearities： robust stability and command effort minimization by disturbance rejection

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Control Theory and Technology 2016年第3期14卷 209-223页

作者： carlo NOVARA Enrico CANUTO Donato CARLUCCI Politecnico di Torino Italy

The paper shows that a control strategy with disturbance rejection is able to reduce the control effort to a minimum, ensuring at the same time a desired performance level. The disturbance to be rejected is completely unknown, except for a sectorial bound. The control unit is endowed with an extended state observer which includes a disturbance dynamics, whose state tracks the unknown disturbance to be rejected. In summary, the novel contributions of the paper are the following. First, we derive a robust stability condition for the proposed control scheme, holding for all the nonlinearities that are bounded by a known （or estimated） maximum slope. Second, we propose a novel approach for designing the observer and state feedback gains, which guarantee robust closed-loop stability. Third, we show that the designed control system yields, with a minimum control effort, the same control performance as a robust state feedback control, which on the contrary may require a larger command activity. Two simulated case studies are presented to show the effectiveness of the proposed approach.

关键词： Disturbance rejection extended observer robust stability sector-bounded nonlinear systems

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Embedded model control:Reconciling modern control theory and error-based control design

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Control Theory and Technology 2018年第4期16卷 261-283页

作者： Enrico CANUTO carlo NOVARA Luigi COLANGELO Politecnico di Torino Italy

The paper addresses the problem of reconciling the modern control paradigm developed by R. Kalman in the sixties of the past century, and the centenary error-based design of the proportional, integrative and derivative （PID） controllers. This is done with the help of the error loop whose stability is proved to be necessary and sufficient for the close-loop plant stability. The error loop is built by cascading the uncertain plant-to-model discrepancies （causal, parametric, initial state, neglected dynamics）, which are driven by the design model output and by arbitrary bounded signals, with the control unit transfer functions. The embedded model control takes advantage of the error loop and its equations to design appropriate algorithms of the modern control theory （state predictor, control law, reference generator）, which guarantee the error loop stability and performance. A simulated multivariate case study shows modeling and control design steps and the coherence of the predicted and simulated performance.

关键词： Modern control theory error-based design embedded model control error loop disturbance rejection

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