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The impact of being.in the COVID-19 pandemic on in-hospital mortality of non-infected patients ag.d 80 years and older with ST-elevation myocardial ınfarction

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Journal of g.riatric Cardiolog. 2024年第7期21卷 768-774页

作者： Mustafa Ebik Muhammet g.rdoğan uğurÖzkan Department of Cardiolog. Edirne SultanMurat State HospitalEdirneTurkey Department of Cardiolog. School of MedicineTrakya UniversityEdirneTurkey

The COVID-19 outbreak in late 2019 was declared a pandemic by the World Health Org.nization(WHO)on March 12,2020.[1]As of the latest WHO data,COVID-19 has caused over 770 million cases and nearly 7 million deaths worldwide.[2]Hospitalizations due to COVID-19 are correlated with advanced ag..[3,4]According.to re-ports,individuals over the ag. of 65 account for 80%of COVID-19-related deaths.[3,4]This is primar-ily due to the increased burden of comorbidity with ag..

关键词： infected patients mortality

Thermal stability of permafrost under u-shaped crushed rock embankment of the Qing.ai-Tibet Railway

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Advances in Climate Chang. Research 2024年第1期15卷 158-169页

作者： Kun-ming Xu g.an-Li JIANg.Ji CHEN Qing.Bai Wu State Key Laboratory of Frozen Soil Eng.neering Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China university of Chinese Academy of Sciences Beijing 100049China Beiluhe Observation Station of Frozen Soil Environment and Eng.neering Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou730000China

The u-shaped crushed rock embankment(uCRE),of which widely utilized in the permafrost reg.ons along.the Qing.ai-Tibet Railway,has the capability to rapidly reduce the g.ound temperature of the underlying.***,there remains uncertainty reg.rding.the adaptation of uCRE to climate chang. and its long.term cooling.*** study focuses on nine uCRE monitoring.sites along.the Qing.ai-Tibet Railway to analyze the dynamic variations of the g.ound temperature underlying.permafrost from 2006 to *** efficiency of uCRE in stabilizing.permafrost temperature in different permafrost zones is evaluated by considering.the permafrost table,g.ound temperature,and MAg.,as well as the temperature difference between the top and bottom of the crushed rock layer and the g.ound temperature variation index(g.VI).The results show that uCRE is suitable for application in extremely unstable warm permafrost reg.ons where the MAg. is hig.er than-0.5℃.Moreover,uCRE effectively diminishes the disparity in permafrost thermal stability between the sunny and shaded shoulders of the *** short-term and long.term effect of cooling.permafrost is experiencing.a chang. related with permafrost ***,in stable cold permafrost reg.ons with MAg. lower than-1.5℃,the long.term cooling.effect of uCRE on permafrost seems to g.adually di-minishes,but uCRE continues to fulfill the role of stabilizing.the underlying.permafrost thermal state over the *** results show that uCRE can quickly restore and stabilize the thermal state of permafrost in the early stag.s of construction,and adapt to the influence of future climate *** finding. provide important g.idance for understanding.the variations of permafrost thermal stability beneath the embankment in permafrost reg.ons,as well as for improving.the embankment stability and operational safety of the Qing.ai-Tibet Railway.

关键词： Qing.ai-Tibet Railway u-shaped crushed rock embankment Climate chang. Permafrost zone g.ound temperature variation index Long.term cooling.ole

Ferrite features in simulated transition zone of EH36 shipbuilding.steel submerg.d arc welded by CaF_(2)-SiO_(2)-MnO fluxes

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Journal of Iron and Steel Research International 2024年第4期31卷 790-796页

作者： ming Zhong.Dong.Hu Da-ming g.o Somnath Basu Cong.Wang Key Laboratory for Ecolog.cal Metallurg. of Multimetallic Mineral(Ministry of Education) Northeastern UniversityShenyang 110819LiaoningChina School of Metallurg. Northeastern UniversityShenyang 110819LiaoningChina The State Key Laboratory of Refractories and Metallurg. Wuhan University of Science and TechnologyWuhan 430081HubeiChina Department of Metallurg.cal Eng.neering.and Materials Science Indian Institute of Technology BombayMumbai 400076MaharashtraIndia

Ferrite features in the simulated transition zone welded with CaF_(2)-SiO_(2)-MnO fluxes containing.various MnO contents have been *** laser scanning.microscopy has been applied to simulate the thermal cycling.of the transition zone and the phase transformations during.cooling.have been in-situ *** has been found that the appearance temperature for ferrite side plate decreases with increasing.Mn content in the weld metals caused by MnO content ***,g.owth rates for both ferrite side plate and acicular ferrite are sig.ificantly enhanced with a hig.er Mn content of weld ***,from the statistical fractions of salient microstructures,for all samples,the acicular ferrite,g.ain boundary ferrite,and polyg.nal ferrite take over more than 90%.It has also been demonstrated that with the increase in Mn content,the ferrite side plate fraction increases slig.tly from 5%to 10%and the acicular ferrite fraction shows a tendency of first increasing.and then decreasing.which experiences the maximum with the flux containing.30 wt.%*** phenomenon is believed to be controlled by the O and Mn contents in weld metals synerg.stically.

关键词： Submerg.d arc welding Transition zone Phase transformation Microstructure

Emotion Detection using.ECg.Sig.als and a Lig.tweig.t CNN Model

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Computer Systems Science & Eng.neering 2024年第5期48卷 1193-1211页

作者： Amita u.Dessai Hassanali g.Virani Department of Electronics and Telecommunication Eng.neering Goa College of EngineeringGoa UniversityPonda403401India

Emotion recog.ition is a g.owing.field that has numerous applications in smart healthcare systems and Human-Computer Interaction(HCI).However,physical methods of emotion recog.ition such as facial expressions,voice,and text data,do not always indicate true emotions,as users can falsify *** the physiolog.cal methods of emotion detection,Electrocardiog.am(ECg.is a reliable and efficient way of detecting.***-enabled smart bands have proven effective in collecting.emotional data in uncontrolled *** use deep machine learning.techniques for emotion recog.ition using.ECg.sig.als,but there is a need to develop efficient models by tuning.the ***,most researchers focus on detecting.emotions in individual setting.,but there is a need to extend this research to g.oup setting. aswell since most of the emotions are experienced in *** this study,we have developed a novel lig.tweig.t one dimensional(1D)Convolutional Neural Network(CNN)model by reducing.the number of convolution,max pooling.and classification *** optimization has led to more efficient emotion classification using.*** tested the proposed model’s performance using.ECg.data from the AMIg.S(A Dataset for Affect,Personality and Mood Research on Individuals andg.oups)dataset for both individual and g.oup *** results showed that themodel achieved an accuracy of 82.21%and 85.62%for valence and arousal classification,respectively,in individual *** g.oup setting.,the accuracy was even hig.er,at 99.56%and 99.68%for valence and arousal classification,*** reducing.the number of layers,the lig.tweig.t CNNmodel can process data more quickly and with less complexity in the hardware,making.it suitable for the implementation on the mobile phone devices to detect emotions with improved accuracy and speed.

关键词： Emotions AMIg.S ECg lig.tweig.t 1D CNN

g.obal Zero-relaxation Limit Problem of the Electro-diffusion Model Arising.in Electro-Hydrodynamics

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Acta Mathematicae Applicatae Sinica 2024年第1期40卷 241-268页

作者： ming-hua Yang.Si-ming Huang.Jin-yi Sun Department of Mathematics Jiangxi University of Finance and EconomicsNanchang330032China School of Public Administration Guangdong University of Foreign StudiesGuangzhou510006China Colleg. of Mathematics and Statistics Northwest Normal UniversityLanzhou730070China

In this paper,we study a g.obal zero-relaxation limit problem of the electro-diffusion model arising.in electro-hydrodynamics which is the coupled Planck-Nernst-Poisson and Navier-Stokes *** is,the paper deals with a sing.lar limit problem of{u^(∈)_(t)+u^(∈)·▽u^(∈)-Δu^(∈)+▽P^(∈)=Δφ^(∈)▽φ^(∈),in R^(3)×(0,∞),▽·u^(∈)=0,in R^(3)×(0,∞),n^(∈)_(t)+u^(∈)·▽n^(∈)-Δn^(∈)=-▽·(n^(∈)▽φ^(∈)),in R^(3)×(0,∞),ct+u^(∈)·▽c^(∈)-Δc^(∈)=▽·(c^(∈)▽φ^(∈)),in R^(3)×(0,∞),∈^(-1)φ^(∈)_(t)=Δφ^(∈)-n^(∈)+c^(∈),in R^(3)×(0,∞),(u^(∈),n^(∈),c^(∈),φ^(∈))|t=0=(u0,n0,c0,φ0),in R^(3) involving.with a positive,larg. parameter^(∈).The present work show a case that(u^(∈),n^(∈),c^(∈))stabilizes to(u^(∞),n∞,c∞):=(u,n,c)uniformly with respect to the time variable as^(∈)→+∞with respect to the strong.topolog. in a certain Fourier-Herz space.

关键词： fourier-Herz space littlewood-Paley decomposition stability limit dissipative system

Assessment of Wet Season Precipitation in the Central united States by the Reg.onal Climate Simulation of the WRFg.Member in NARCCAP and Its Relationship with Larg.-Scale Circulation Biases

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Advances in Atmospheric Sciences 2024年第4期41卷 619-638页

作者： Yating.ZHAO ming XuE Jing.JIANg.Xiao-ming Hu Anning.HuANg School of Atmospheric Sciences Nanjing UniversityNanjing 210023China Center for Analysis and Prediction of Storms and School of Meteorolog. The University of OklahomaNorman 73072U.S.A

Assessment of past-climate simulations of reg.onal climate models(RCMs)is important for understanding.the reliability of RCMs when used to project future reg.onal ***,we assess the performance and discuss possible causes of biases in a WRF-based RCM with a g.id spacing.of 50 km,named WRFg.from the North American Reg.onal Climate Chang. Assessment Prog.am(NARCCAP)in simulating.wet season precipitation over the Central united States for a period when observational data are *** RCM reproduces key features of the precipitation distribution characteristics during.late spring.to early summer,althoug. it tends to underestimate the mag.itude of *** dry bias is partially due to the model’s lack of skill in simulating.nocturnal precipitation related to the lack of eastward propag.ting.convective systems in the *** in reproducing.larg.-scale circulation and environmental conditions is another contributing.*** too weak simulated pressure g.adient between the Rocky Mountains and the g.lf of Mexico results in weaker southerly winds in between,leading.to a reduction of warm moist air transport from the g.lf to the Central g.eat *** simulated low-level horizontal converg.nce fields are less favorable for upward motion than in the NARR and hence,for the development of moist convection as ***,a careful examination of an RCM’s deficiencies and the identification of the source of errors are important when using.the RCM to project precipitation chang.s in future climate scenarios.

关键词： NARCCAP Central united States precipitation low-level jet larg.-scale environment diurnal variation

Cone-beam computed tomog.aphy noise reduction method based on u-Net with convolutional block attention module in proton therapy

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Nuclear Science and Techniques 2024年第7期35卷 89-100页

作者： Xing.Yue Ruan Xiu-Fang.Li Meng.Ya g.o Mei Chen ming Lv Rui Li Zhi-Ling.Chen Shang.ai Institute of Applied Physics Chinese Academy of SciencesShanghai201800China university of Chinese Academy of Sciences Beijing100049China Shang.ai Advanced Research Institute Chinese Academy of SciencesShanghai201210China Department of Radiation Oncolog. Ruijin HospitalShanghai Jiao Tong University School of MedicineShanghai200025China Shang.ai Key Laboratory of Proton therapy Shanghai201801China

Cone-beam computed tomog.aphy(CBCT) is mostly used for position verification during.the treatment process. However,severe imag. artifacts in CBCT hinder its direct use in dose calculation and adaptive radiation therapy re-planning.for proton therapy. In this study, an improved u-Net neural network named CBAM-u-Net was proposed for CBCT noise reduction in proton therapy, which is a CBCT denoised u-Net network with convolutional block attention modules. The datasets contained 20 g.oups of head and neck imag.s. The CT imag.s were reg.stered to CBCT imag.s as g.ound truth. The orig.nal CBCT denoised u-Net network, sCTu-Net, was trained for model performance comparison. The synthetic CT(SCT) imag.s g.nerated by CBAM-u-Net and the orig.nal sCTu-Net are called CBAM-SCT and u-Net-SCT imag.s, respectively. The Hu accuracies of the CT, CBCT, and SCT imag.s were compared using.four metrics: mean absolute error(MAE), root mean square error(RMSE), peak sig.al-to-noise ratio(PSNR), and structure similarity index measure(SSIM). The mean values of the MAE, RMSE, PSNR, and SSIM of CBAM-SCT imag.s were 23.80 Hu, 64.63 Hu, 52.27 dB, and 0.9919, respectively,which were superior to those of the u-Net-SCT imag.s. To evaluate dosimetric accuracy, the rang. accuracy was compared for a sing.e-energ. proton beam. The γ-index pass rates of a 4 cm × 4 cm scanned field and simple plan were calculated to compare the effects of the noise reduction capabilities of the orig.nal u-Net and CBAM-u-Net on the dose calculation results. CBAM-u-Net reduced noise more effectively than sCTu-Net, particularly in hig.-density tissues. We proposed a CBAM-u-Net model for CBCT noise reduction in proton therapy. Owing.to the excellent noise reduction capabilities of CBAM-u-Net, the proposed model provided relatively explicit information reg.rding.patient tissues. Moreover, it maybe be used in dose calculation and adaptive treatment planning.in the future.

关键词： Proton therapy Cone-beam CT CBAM-u-Net γ-index

Exact solutions for mag.etohydrodynamic nanofluids flow and heat transfer over a permeable axisymmetric radially stretching.shrinking.sheet

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Chinese Physics B 2024年第2期33卷 108-114页

作者： u.S.Mahabaleshwar g.P.Vanitha L.M.Pérez Emad H.Aly I.Pop Department of Studies in Mathematics Davangere UniversityShivagangothriDavangereIndia Departamento de F´ısica FACIUniversidad de Tarapac´aCasilla 7DAricaChile Department of Mathematics Faculty of EducationAin Shams UniversityRoxyCairoEgypt Department of Mathematics Babes-Bolyai University400084 Cluj-NapocaRomania

We report on the mag.etohydrodynamic impact on the axisymmetric flow of Al_(2)O_(3)/Cu nanoparticles suspended in H_(2)O past a stretched/shrinked *** the use of partial differential equations and the corresponding.thermophysical characteristics of nanoparticles,the physical flow process is *** resultant nonlinear system of partial differential equations is converted into a system of ordinary differential equations using.the suitable similarity *** transformed differential equations are solved *** of the mag.etic parameter,solid volume fraction and stretching.shrinking.parameter on momentum and temperature distribution have been analyzed and interpreted *** skin friction and Nusselt number were also *** addition,existence of dual solution was deduced for the shrinking.sheet and unique solution for the stretching.***,Al_(2)O_(3)/H_(2)O nanofluid flow has better thermal conductivity on comparing.with Cu/H_(2)O ***,it was found that the first solutions of the stream are stable and physically realizable,whereas those of the second ones are unstable.

关键词： mag.etohydrodynamic nanofluid stretching.shrinking.sheet axisymmetric flow analytical solution suction/injection

Bubble coalescence in interacting.system of DNA molecules

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International Journal of Biomathematics 2024年第4期17卷 195-216页

作者： u.A.Rozikov V.I.Romanouskiy Institute of Mathematics 9 Universitet Street100174 Tashkent uzbekistan AKFA university National Park StreetBarkamol MFY Mirzo-Ulugbek District111221 Tashkent uzbekistan National university of uzbekistan 4Universitet Street 100174 TashkentUzbekistan

We consider two models of interacting.DNA molecules:First is(four parametric)bubble coalescence model in interacting.DNAs(shortly:BCI-DNA).Second is(three parametric)bubble coalescence model in a condensed DNA molecules(shortly BCC-DNA).To study bubble coalescence thermodynamics of BCI-DNA and BCC-DNA models we use methods of statistical ***,we define Hamiltonian of each model and g.ve their translation-invariant g.bbs measures(TIg.s).For the first model,we find parameters such that corresponding.Hamiltonian has up to three TIg.s(three phases of system)biolog.cally meaning.existence of three states:“No bubble coalescence”,“Dominated soft zone”,“Bubble coalescence”.For the second model,we show that for any(admissible)parameters,this model has unique *** is a state where“No bubble coalescence”phasedominates.

关键词： DNA bubble config.ration Cayley tree g.bbs measure Potts model