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Chinese Physics B 2020年第4期29卷 179-189页

作者： s M Ngounou f B Pelap Unite de Recherche de Mecanique et de Modelisation des systèmes Physiques(UR-2 MsP) Faculte des SciencesUniversite de DschangBP 69 DschangCameroun Unite de Recherche de Matiere Condensee d'Electronique et de Traitement du signal(UR-MACETs) Faculte des SciencesUniversite de DschangBP 67 DschangCameroun

The dynamics of modulated waves in a nonlinear bi-inductance transmission line with dissipative elements are *** show the existence of two frequency modes and carry out intensive investigations on the low frequency *** to the multiple scales method,the behavior of these waves is investigated and the dissipative effects are *** appears that the dissipation coefficient increases with the carrier wave *** the continuous approximation,we derive that the propagation of these waves is governed by the complex Ginzburg-Landau equation instead of the Korteweg-de-Vries equation as previously *** studies of the dynamics of plane waves in the line reveal the existence of three additional regions in the dispersion curve where the modulational phenomenon is *** the low frequency mode,we demonstrate that the network allows the propagation of dark and bright *** findings are in perfect agreement with the analytical predictions.

关键词： dissipative bi-inductance network low frequency mode continuous approximation complex Ginzburg-Landau equation

Dynamics of high-frequency modulated waves in a nonlinear dissipative continuous bi-inductance network

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Chinese Physics B 2021年第6期30卷 193-205页

作者： s M Ngounou f B Pelap Unitéde Recherche de Mécanique et de Modélisation des systèmes Physiques(UR-2 MsP) Facultédes SciencesUniversitéde DschangBP 69 DschangCameroun Unitéde Recherche de Matière Condensée d'Electronique et de Traitement du signal(UR-MACETs) Facultédes SciencesUniversitéde DschangBP 67 DschangCameroun

This paper presents intensive investigation of dynamics of high frequency nonlinear modulated excitations in a damped bimodal lattice. The effects of the dissipation are considered through a linear dissipation coefficient whose evolution in terms of the carrier wave frequency is checked. There appears that the dissipation coefficient increases with the carrier wave frequency. In the linear limit and for high frequency waves, study of the asymptotic behavior of plane waves reveals the existence of two additional regions in the dispersion curve where the modulational phenomenon is observed compared to the lossless line. Based on the multiple scales method exploited in the continuum approximation using an appropriate decoupling ansatz for the voltage of the two different cells, it appears that the motion of modulated waves is described by a dissipative complex Ginzburg–Landau equation instead of a Korteweg–de Vries equation. We also show that this amplitude wave equation admits envelope and hole solitons in the high frequency mode. from basic sources, we design a programmable electronic generator of complex signals with desired characteristics, which delivers signals exploited as input waves for all our numerical simulations. These simulations are performed in the LTspice software that uses realistic components and give the results that corroborate perfectly our analytical predictions.

关键词： dissipative bi-inductance network high-frequency mode continuous approximation dissipative complex Ginzburg–Landau equation programmable electronic generator LT-Pspice observations

failure to Rescue as a Quality Metric in Congenital Heart surgeries in a High-Complexity service Provider Institution Located in a Middle-Income Country

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Congenital Heart Disease 2024年第2期19卷 207-218页

作者： Gustavo Cruz santiago Pedroza Juan f.Vélez jessica Largo Juan f.Tejada Jorge H.Mejía-Mantilla Departamento de Anestesiología Fundación Valle del LiliCali760032Colombia Centro de Investigaciones Clínicas Fundación Valle del LiliCali760032Colombia Departamento de Cardiología Pediátrica Fundación Valle del LiliCali760032Colombia facultad de Medicina Universidad IcesiCali760031Colombia Unidad de Cuidado Intensivo Fundación Valle del LiliCali760032Colombia

Background:failure to rescue has been an effective quality metric in congenital heart ***,mor-bidity and mortality depend greatly on non-modifiable individual factors and have a weak correlation with better-quality *** aim to measure the complications,mortality,and risk factors in pediatric patients undergoing congenital heart surgery in a high-complexity institution located in a middle-income country and compare it with other institutions that have conducted a similar ***:A retrospective observational study was conducted in a high-complexity service provider institution,in Cali,*** pediatric patients undergoing any congenital heart surgery between 2019 and 2022 were *** main outcomes evaluated in the study were complication,mortality,and failure to rescue *** and multivariate logistic regression analysis was performed with mortality as the outcome ***:We evaluated 308 congenital heart *** the outcomes,201(65%)complications occurred,23(7.5%)patients died,and the fTR of the entire cohort was 11.4%.The presence of a postoperative complication(OR 14.88,CI 3.06–268.37,p=0.009),age(OR 0.79,CI 0.57–0.96,p=0.068),and urgent/emergent surgery(OR 8.14,CI 2.97–28.66,pst significant variables in predicting ***:failure to rescue is an effective and comparable quality measure in healthcare institutions and is the major contributor to postoperative mortality in congenital heart *** our higher mortality and complication rate,we obtained a comparable failure to rescue rate to high-income countries’health institutions.

关键词： Congenital heart surgery complication mortality failure to rescue quality metric

Tensile and spring-Back Behavior of DP600 Advanced High strength steel at Warm Temperatures

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Journal of Iron and steel Research International 2009年第6期16卷 41-46页

作者： f Ozturk s Toros s Kilic Department of Mechanical Engineering Nigde University

In recent years, the use of advanced high strength steels in automotive industry has been increased remarkably. Among advanced high strength steels, dual phase （DP） steels have gained a great attention owing to a combination of high strength and good formability. However, high strength usually increases the spring-back behavior of the material, which creates problems for the parts during the assembly. Thus, the uniaxial tensile deformation and spring-back behaviors of DP600 advanced high strength steel were investigated in rolling （0°）, diagonal （45°） , and transverse （90°） directions in the temperature range from room temperature （RT） to 300 ℃. All tests were performed at a deformation speed of 25 mm/min. A V-shaped die （60°） was used for the spring-back measurements. The results indicated that the formability and spring-back of the material were decreased with increasing the temperatures. The material showed complex behaviors in different directions and at different temperatures.

关键词： advanced high strength steel DP600 warm forming spring-back

Highly graphitized carbon nanosheets with embedded Ni nanocrystals as anode for Li-ion batteries

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Nano Research 2020年第1期13卷 86-94页

作者： francisco Javier soler-Piña Celia Hernández-Rentero Alvaro Caballero Julián Morales Enrique Rodríguez-Castellón jesús Canales-Vázquez Dpto.Química Inorgánica e Ingeniería Química Instituto de Química Fina y NanoquímicaUniversidad de Córdoba14071CórdobaSpain Dpto.Química Inorgánica Cristalografía y MineralogíaFacultad de CienciasUniversidad de Málaga29071MálagaSpain Instituto de Energías Renovables Universidad de Castilla-La ManchaPaseo de La Investigación 102071AlbaceteSpain

A C/Ni composite was prepared via thermal decomposition of a nickel oleate complex at 700℃,yielding disperse Ni nanocrystals with an average size of 20 nm,encapsulated by carbon nanosheets as deduced from transmission electron microscopy(TEM)images and confirmed from X-ray photoelectron spectroscopy(XPs).furthermore,the X-ray diffraction pattern revealed a good ordering of the carbon layers,forced by the Ni encapsulation to adopt a bending *** the close interaction between the graphitized framework and the metallic nanoparticles we have studied the properties of the composite as an anode for Li-ion *** with other nanostructured synthetic carbons,this carbon composite has a low voltage hysteresis and a modest irreversible capacity value,properties that play a significant role in its behaviour as electrodes in full cell *** moderate rate values,0.25 C,the electrode delivers an average capacity value around 723 mAh·g^−1 on cycling,among the highest values so far reported for this carbon *** higher rate values,1 C,the average capacity values delivered by the cell on cycling decrease,around 205 mAh·g^−1,but it maintains good capacity retention,a coulombic efficiency close to 100%after the first cycles and recovery of the capacity values when the rate is restored from 3 to 0.1 C.

关键词： carbon nanosheets nickel nanoparticles anode lithium batteries

fORGING AsIA′s GLOBAL TRANsPARK IN THE PEARL RIVER DELTA AT ZHUHAI

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Chinese Geographical science 2003年第4期13卷 300-309页

作者： Victor f s sIT .

The main purpose of the paper is to introduce the concept of the Global TransPark (GTP). It is a critical time to develop air logistics infrastructure in the New Economy. The paper also presents a brief review of the air cargo industry in the Asian-Pacific region and China,in particular China’s development in the industry as its economy has grown rapidly and globalized in the past two decades. The paper argues that China needs to develop a GTP to support its future growth,and explains why the Pearl River Delta-Hong Kong-Macao city-region or Extended Metropolitan Region (EMR) is the best location. finally,it proposes that Zhuhai Airport,one of the five airports in the EMR,is the best site for the GTP. New policies from Chinese government as well as close cooperation between local governments of Guangdong and the two special Administrative Regions of Hong Kong and Macao will be needed to make the establishment of the GTP possible.

关键词： Global TransPark airport air cargo transport Hong Kong Extended Metropolitan Region the Pearl River Delta New Economy

Biodiesel from soybean Oil Transesterification Assisted by Ultrasonic Irradiation

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Biodiesel from Soybean Oil Transesterification Assisted by U...

Application of Different Kinetic Methods to the Thermogravimetric Analysis of Kenaf（Hibiscus Cannabinus）

作者： José M.Encinar Gloria Martínez Juan f.gonzález Nuria sánchez Dolores álvarez Department of Chemical Engineering and Physical Chemistry University of Extremadura Department of Applied Physics University of Extremadura

Biodiesel has been produced by transesterification of soybean oil by methanol. This reaction, heterogeneous, only takes place in the interphase alcohol triglyceride. Lowfrequency ultrasonic irradiation produces an emulsion of the two immiscible liquids, improving mass transfer and getting that the chemical reaction controls the kinetic of the process. This causes an increase of the reaction rate, decreasing time of reaction. Abatch and a continuous process were carried out, using potassium hydroxide as catalyst. A Branson processor of 20 k Hz was used in all of the experiments. In the batch process methanol: oil molar ratio(3:1 to 15:1), maximum temperature(70 and 100 oC) and ultrasound amplitude(40 to 100%) were studied. In the continuous process, methanol: oil molar ratio(6:1, 12:1 and 15:1) and catalyst concentration(0.28 to 0.70 g.m L-1) were evaluated. In the first process, Me OH:oil molar ratio influenced on the yield, while temperature did not exercise influence. Amplitude affected reaction rate, but the conversion achieved was similar after 15 minutes. In the continuous process, the Me OH:oil molar ratio influenced in the reaction, while the concentration of catalyst had a positive effect only to low residence times.

关键词： Biodiesel soybean oil transesterification ultrasonic irradiation

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Application of Different Kinetic Methods to the Thermogravim...

Modeling and simulation of Molecular Mechanism of Action of Dietary Polyphenols on the Inhibition of Anti-Apoptotic PI3K/AKT Pathway

The 18th European Biomass Conference and Exhibition

作者： gonzález J.f. Encinar J.M. Román s. Rayo M.C.

The objective of this work was to investigate the thermal decomposition process of kenaf（Hibiscus cannabinus） and to determine their activation energy values associated through a dynamic thermogravimetric analysis by model-free methods. The pyrolysis of kenaf has been carried out by means of thermogravimetric analysis in Ar atmosphere. four heating rates were used（5-10-20-40 K min-1） up to a final temperature of 700 oC. The activation energy values were calculated as a function of the extent of conversion during the pyrolysis process by means of friedman, Kissinger-Akahira-sunose and flynn–Wall–Ozawa isoconversional methods. The results showed that there are small differences between the activation energy values obtained from the three methods. Also, a relationship between the activation energy and the conversion reached was found.

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Computational Molecular Bioscience 2013年第3期3卷 39-52页

作者： Pedro Pablo gonzález-Pérez Maura Cárdenas-García Departamento de Matemáticas Aplicadas y sistemas Universidad Autónoma Metropolitana México D.F. México facultad de Medicina Benemérita Universidad Autónoma de Puebla Puebla México

In recent years, the role of dietary phenolic compounds in the regulation of cellular metabolism in normal and pathological conditions has become increasingly important in cancer research. In most cases, the molecular mechanism of action related to the anticarcinogenic effect of phenolic compounds has been studied in vitro and in animal models, but these studies are still not complete. It is precisely here where in silico approaches can be an invaluable tool for complementing in vitro and in vivo research. In this paper, we adopt a tuple space-based modeling and simulation approach, and show how it can be applied to the simulation of complex interaction patterns of intracellular signaling pathways. specifically, we are working to explore and to understand the molecular mechanism of action of dietary phenolic compounds on the inhibition of the PI3K/AKT anti-apoptotic pathway. As a first approximation, using the tuple spaces- based in silico approach, we model and simulate the anti-apoptotic PI3K/AKT pathway in the absence and presence of phenolic compounds, in order to determine the effectiveness of our platform, to employ it in future prediction of experimentally non visualized interactions between the pathway components and phenolic compounds.

关键词： Anti-Apoptotic Intracellular signaling Pathway Computer simulation self-Organizing Coordination

局限性掌部角化过少局限性掌部角化过少局部外用钙泊三醇长期治疗后的临床及超微结构变化

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世界核心医学期刊文摘（皮肤病学分册） 2006年第1期2卷 21-22页

作者： Urbina f Misad C gonzález s 王琼 Algeciras 583 Las Condes Santiago Chile

Circumscribed palmar hypokeratosis is a recently described condition that consists of a solitary area of depressed skin affecting the palm(or sole). Its histopathological features include a thinned horny layer, a slightly diminished granular cell layer, and intraepidermal vacuolated cells. Prolonged treatment with topical calcipotriol resulted in complete recovery of the affected zone in the case reported here. A second biopsy of the lesion taken at around the fourth year of therapy showed a normalization of the granular layer, a reduction in the intraepidermal vacuolated cells, and a somewhat thicker horny layer. An ultrastructural study carried out at the same time showed a reduction in keratin bundles and keratohyalin granules, and an increase in lipid droplets up to the horny layer. These findings and the therapeutic response to topical calcipotriol support the concept that circumscribed palmar hypokeratosis is a focalized abnormal keratini zation defect morphologically expressed at the granular and horny layers.

关键词：钙泊三醇掌部角化超微结构变化空泡细胞颗粒层皮肤凹陷皮损部位颗粒细胞层蛋白颗粒