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An Efficient Method for Covid-19 Detection Using Light Weight Convolutional Neural Network

Computers, Materials & Continua 2021年第11期69卷 2475-2491页

作者： Saddam Bekhet Monagi H.Alkinani Reinel Tabares-soto M.Hassaballah Faculty of Commerce South Valley UniversityQenaEgypt Department of Computer Science and Artificial Intelligence College of Computer Science and EngineeringUniversity of JeddahJeddah21959Saudi Arabia Department of Electronics and Automation Universidad Autónoma de ManizalesManizales170001Colombia Department of Computer Science Faculty of Computers and InformationSouth Valley UniversityQenaEgypt

The COVID-19 pandemic is a significant milestone in the modern history of civilization with a catastrophic effect on global wellbeing and *** situation is very complex as the COVID-19 test kits are limited,therefore,more diagnostic methods must be developed urgently.A significant initial step towards the successful diagnosis of the COVID-19 is the chest X-ray or Computed Tomography(CT),where any chest anomalies(e.g.,lung inflammation)can be easily *** hospitals possess X-ray or CT imaging equipments that can be used for early detection of *** by this,various artificial intelligence(AI)techniques have been developed to identify COVID-19 positive patients using the chest X-ray or CT ***,the advance of these AI-based systems and their highly tailored results are strongly bonded to high-end GPUs,which is not widely available in several *** paper introduces a technique for early COVID-19 diagnosis based on medical experience and light-weight Convolutional Neural Networks(CNNs),which does not require a custom hardware to run compared to currently available CNN *** proposed deep learning model is built carefully and fine-tuned by removing all unnecessary parameters and layers to achieve the light-weight attribute that could run smoothly on a normal CPU(0.54%of AlexNet parameters).This model is highly beneficial for countries where high-end GPUs are *** outcomes on some new benchmark datasets shows the robustness of the proposed technique robustness in recognizing COVID-19 with 96%accuracy.

关键词： Artificial intelligence COVID-19 chest CT chest X-ray deep learning

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Influence of temperature and salinity on hydrodynamic forces

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Journal of Ocean Engineering and Science 2016年第4期1卷 325-336页

作者： A.Escobar V.negro J.S.López-Gutiérrez M.D.Esteban Technical University of Madrid C/Profesor Aranguren S/N28040 MadridSpain

The purpose of this study is to introduce an innovative approach to offshore engineering so as to take variations in sea temperature and salinity into account in the calculation of hydrodynamic *** this in mind,a thorough critical analysis of the influence of sea temperature and salinity on hydrodynamic forces on piles like those used nowadays in offshore wind farms will be carried *** influence on hydrodynamic forces occurs through a change in water density and viscosity due to temperature and salinity ***,the aim here is to observe whether models currently used to estimate wave forces on piles are valid for different ranges of sea temperature and salinity apart from observing the limit when diffraction or nonlinear effects arise combining both effects with the magnitude of the pile ***,specific software has been developed to simulate equations in fluid mechanics taking into account nonlinear and diffraction *** software enables wave produced forces on a cylinder supported on the sea bed to be *** study includes observations on the calculation model’s sensitivity as to a variation in the cylinder’s diameter,on the one hand and,on the other,as to temperature and salinity *** software will enable an iterative calculation to be made for finding out the shape the pressure wave caused when a wave passes over will have for different pile diameters and water with different temperature and salinity.

关键词： Sea temperature Salinity Hydrodynamic forces Wave action Offshore wind farms

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Combining anti-inflammatory and unfolding protein responses to fight stroke

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Neural Regeneration Research 2019年第3期14卷 450-451页

作者： Berta Anuncibay-soto Enrique Font-Belmonte Arsenio Fernández-López área de Biología Celular Instituto de Biomedicina Universidad de León Neural Therapies SL Edificio Institutos de Investigación Campus de Vegazana

This perspective shows an attempt to obtain synergy effects to fight ischemic stroke by combining agents acting on two different homeostatic mechanisms:inflammation and unfolded protein response (Anuncibay-soto et al.,2018).Different pharmacological approaches have been assayed to alleviate cerebrovascular accident (stroke), which represents one of the most devastating diseases in the elderly.

关键词： Combining anti-inflammatory

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Oxidative desulfurization of diesel fuel oil using supported Fenton catalysts and assisted with ultrasonic energy

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Petroleum Science 2019年第5期16卷 1176-1184页

作者： roberto Flores Arturo Rodas Raquel Gasperin Facultad de Ciencias Químicas e Ingeniería Universidad Autónoma del Estado de MorelosAv.Universidad No.1001Col.Chamilpa62209 CuernavacaMorelosMexico Gerencia de Materiales y Procesos Químicos Instituto Nacional de Electricidad y Energías LimpiasCalle Reforma 113Col.Palmira62490 CuernavacaMorelosMexico

An ultrasound-assisted heterogeneous catalytic oxidation process was applied to eliminate sulfur from commercial diesel fuel *** studied variables were catalyst concentration,type of catalyst(homogeneous or heterogeneous),oxidizing agent concentration,and the application of ultrasound *** catalysts were prepared by impregnation of coal fly ash with an iron(Ⅱ)sulfate aqueous solution using ultrasound *** drying,the catalyst was calcined at 500℃for 4 *** oxidizing agent was hydrogen *** energy was applied with a frequency of 47 kHz and an intensity of 147 *** was employed for extracting the oxidized compounds from the hydrocarbon *** fly ash and ethanol were used with the purpose of applying low-cost raw materials in chemical *** was found that under the studied conditions,increasing oxidizing agent concentration and the application of ultrasound energy can enhance the sulfur removal from commercial diesel fuel *** concentration did not play a significant role in the *** results were obtained using homogeneous or heterogeneous catalyst,which is important since the heterogeneous catalyst could be recovered,reactivated,and used in many cycles.

关键词： Oxidative desulfurization Diesel Ultrasound energy Supported catalyst Low-cost raw materials

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Simulation of consumers decision-making process using agent-based model approach

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International Journal of Modeling, Simulation, and Scientific Computing 2019年第6期10卷 30-47页

作者： Daniel soto Forero Yony F.Ceballos German Sanchez Torres Engineer Faculty University of Antioquia Calle 67 No.53-108Medell`inColombia Engineer Faculty University of Magdalena Carrera 32 No.22-08Santa MartaColombia

This paper describes a model to simulate the decision-making process of consumers that adopts technology within a dynamic social *** proposed model use theories and tools from the psychology of consumer behavior,social networks and complex dynamical systems like the Consumat framework and fuzzy *** model has been adjusted using real data,tested with the automobile market and it can recreate trends like those described in the world market.

关键词： Decision-making process bounded rationality agent-based models social networks fuzzy logic model consumers

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Correction of low corneal astigmatism in cataract surgery

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International Journal of Ophthalmology(English edition) 2015年第4期8卷 719-724页

作者： Pia Leon Marco Rocco Pastore Andrea Zanei Ingrid Umari Meriem Messai Corrado negro Daniele Tognetto University Eye Clinic of Trieste Ospedale Maggiore University of Trieste

· AIM: To evaluate and compare aspheric toric intraocular lens(IOL) implantation and aspheric monofocal IOL implantation with limbal relaxing incisions(LRI) to manage low corneal astigmatism(1.0-2.0 D) in cataract surgery.· METHODS: A prospective randomized comparative clinical study was performed. There were randomly recruited 102 eyes(102 patients) with cataracts associated with corneal astigmatism and divided into two groups. The first group received toric IOL implantation and the second one monofocal IOL implantation with peripheral corneal relaxing incisions. Outcomes considered were: visual acuity, postoperative residual astigmatism, endothelial cell count, the need for spectacles, and patient satisfaction. To determine the postoperative toric axis, all patients who underwent the toric IOL implantation were further evaluated using an OPD Scan III(Nidek Co, Japan). Follow-up lasted 6mo.· RESULTS: The mean uncorrected distance visual acuity(UCVA) and the best corrected visual acuity(BCVA) demonstrated statistically significant improvement after surgery in both groups. At the end of the follow-up the UCVA was statistically better in the patients with toric IOL implants compared to those patients who underwent implantation of monofocal IOL plus LRI. The mean residual refractive astigmatism was of 0.4 D for the toric IOL group and 1.1 D for the LRI group(P <0.01). No difference was observed in the postoperative endothelial cell count between the two groups.· CONCLUSION: The two surgical procedures demonstrated a significant decrease in refractive astigmatism. Toric IOL implantation was more effective and predictable compared to the limbal relaxing incision.

关键词： low corneal astigmatism toric intraocular lenses limbal relaxing incisions cataract surgery visual acuity

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Influence of Surface Finishing on High-Temperature Oxidation of AISI Type 444 Ferritic Stainless Steel Used in SOFC Stacks

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Acta Metallurgica Sinica(English Letters) 2017年第8期30卷 697-711页

作者： Valeria Bongiorno Paolo Piccardo Simone Anelli roberto Spotorno Laboratorio di Metallurgia e Materiali - Dipartimento di Chimica e Chimica Industriale (LMM-DCCI) Universita degli Studi di Genova Via Dodecaneso 31 16146 GenoaItaly

This research is focused on the study of the samples, approximatively 15 × 30 mm^2 sized, that were mechanically cut from two sheets （0.4 and 0.2 mm thick, respectively） of AIS1444 Type ferritic stainless steel （FSS）（DIN 1.4521, Eu designation X2CrMoTil8-2）; this material was in the ＇as-rolled＇ state. Part of these specimens were treated superficially on one side using abrasive SiC papers with different average grit sizes （i.e., 46.2, 30.2, 18.3 gm） and diamond suspension （up to 1 tim） in order to obtain various surface roughness. Both the ＇as-rolled＇ and superficially treated samples were then aged in a muffle fumace in static air according to a thermal cycle corresponding to the curing phase of an experimental glass used as sealing in the solid oxide fuel cell stacks. After aging, the chemical compositions and mor- phological peculiarities of the scale formed depending on the thickness of the samples and their surface state were studied by scanning electron microscopy, energy-dispersive spectroscopy, micro-Raman spectroscopy, bright field light optical microscopy. The obtained results show that all scales formed consist of an inner Cr2O3 subscale and an outer （Mn,Cr）3O4 spinel layer; the relationship between FSS grain size and scale microstructural features is consistent on the samples with mirror-like surface only; the scale thicknesses on SiC grinded samples are comparable; the scales covering the ＇as-rolled＇ surfaces are morphologically similar to those grown on the surfaces finished with the 30.2 and 18.3 μm SiC papers, and their thicknesses show an intermediate situation between the abraded and the mirror-like specimens. The last described characteristics depend mainly on the surface and microstructural peculiarities resulting from the rolling process.

关键词： AISI Type 444 SOFC stacks Surface roughness Microstructure Surface finishing High-temperature oxidation

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Exploitation of symmetry in periodic Self-Consistent-Field ab initio calculations: application to large three-dimensional compounds

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Science China Chemistry 2014年第10期57卷 1418-1426页

作者： DE LA PIERRE Marco ORLANDO roberto FERRABONE Matteo ZICOVICH-WILSON Claudio M. DOVESI roberto Dipartimento di Chimica Università di Torino and NIS Nanostructured Interfaces and Surfaces Centre of Excellence Via P. Giuria 7 10125 Torino Italy Nanochemistry Research Institute Department of Chemistry Curtin University GPO Box U1987 Perth WA 6845 Australia Facultad de Ciencias Universidad Autónoma del Estado de Morelos Av. Universidad 1001 Col. Chamilpa 62209 Cuernavaca (Morelos) Mexico

Symmetry can dramatically reduce the computational cost （running time and memory allocation） of Self-Consistent-Field ab initio calculations for crystalline systems. Crucial for running time is use of symmetry in the evaluation of one- and two-electron integrals, diagonalization of the Fock matrix at selected points in reciprocal space, reconstruction of the density matrix. As regards memory allocation, full square matrices （overlap, Fock and density） in the Atomic Orbital （AO） basis are avoided and a direct transformation from the packed AO to the SACO （Symmetry Adapted Crystalline Orbital） basis is per- formed, so that the largest matrix to be handled has the size of the largest sub-block in the latter basis. We here illustrate the effectiveness of this scheme, following recent advancements in the CRYSTAL code, concerning memory allocation and direct basis set transformation. Quantitative examples are given for large unit cell systems, such as zeolites （all-silica faujasite and silicalite MF1） and garnets （pyrope）. It is shown that the full SCF of 3D systems containing up to 576 atoms and 11136 Atomic Orbitals in the cell can be run with a hybrid functional on a single core PC with 500 MB RAM in about 8 h.

关键词： point symmetry Symmetry Adapted Crystalline Orbitals Fock matrix density matrix CPU time memory allocation quantum-mechanical calculations CRYSTAL code

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Hyperglycemia in acute ischemic stroke: physiopathological and therapeutic complexity

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Neural Regeneration Research 2022年第2期17卷 292-299页

作者： Federica Ferrari Antonio Moretti roberto Federico Villa Department of Biology and Biotechnology Laboratory of Pharmacology and Molecular Medicine of Central Nervous SystemUniversity of PaviaVia FerrataPaviaItaly

Diabetes mellitus and associated chronic hyperglycemia enhance the risk of acute ischemic stroke and lead to worsened clinical outcome and increased mortality. However, post-stroke hyperglycemia is also present in a number of non-diabetic patients after acute ischemic stroke, presumably as a stress response. The aim of this review is to summarize the main effects of hyperglycemia when associated to ischemic injury in acute stroke patients, highlighting the clinical and neurological outcomes in these conditions and after the administration of the currently approved pharmacological treatment, i.e. insulin. The disappointing results of the clinical trials on insulin(including the hypoglycemic events) demand a change of strategy based on more focused therapies. Starting from the comprehensive evaluation of the physiopathological alterations occurring in the ischemic brain during hyperglycemic conditions, the effects of various classes of glucose-lowering drugs are reviewed, such as glucose-like peptide-1 receptor agonists, DPP-4 inhibitors and sodium glucose cotransporter 2 inhibitors, in the perspective of overcoming the up-to-date limitations and of evaluating the effectiveness of new potential therapeutic strategies.

关键词： acute ischemic stroke diabetes mellitus DPP-4 inhibitor glucose-like peptide-1 receptor agonist hyperglycemia hypoglycemia insulin physiopathology sodium glucose cotransporter 2 inhibitor

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Dynamical Criticality:Overview and Open Questions

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Journal of Systems Science & Complexity 2018年第3期31卷 647-663页

作者： ROLI Andrea VILLANI Marco FILISETTI Alessandro SERRA roberto Department of Computer Science and Engineering (DISI) Campus of Cesena University of Bologna Italy Department of Physics Informatics and Mathematics University of Modena and Reggio Emilia Italy European Centre for Living Technology Venezia Italy Explora s.r.l. Roma Italy & European Centre for Living Technology Venezia Italy

Systems that exhibit complex behaviours are often found in a particular dynamical con- dition, poised between order and disorder. This observation is at the core of the so-called criticality hypothesis, which states that systems in a dynamical regime between order and disorder attain the highest level of computational capabilities and achieve an optimal trade-off between robustness and flexibility. Recent results in cellular and evolutionary biology, ueuroscience and computer science have revitalised the interest in the criticality hypothesis, emphasising its role as a viable candidate general law in adaptive complex systems. This paper provides an overview of the works on dynamical criticality that are -- To the best of our knowledge -- Particularly relevant for the criticality hypothesis. The authors review the main contributions concerning dynamics and information processing at the edge of chaos, and illustrate the main achievements in the study of critical dynamics in biological systems. Finally, the authors discuss open questions and propose an agenda for future work.

关键词： Attractors criticality dynamical regimes edge of chaos phase transitions.

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