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128层双源Ct冠状动脉成像的诊断准确性:不同采集方案的随机对照

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国际医学放射学杂志 2013年第3期 283-284页

作者： L.A.Neefjes A.Rossi t.s.s.genders K.Nieman s.L.Papadopoulou A.s.Dharampal 宾锋利 Department of Cardiology Erasmus Medical Center

目的比较128层双源Ct冠状动脉成像(CtCA)方案检测管腔阻塞超过50%的冠状动脉狭窄的诊断性能和辐射量。方法前瞻性地将有症状的459例病人纳入CtCA检查。病人被随机分配为大螺距螺旋扫描与窄窗序列扫描的CtCA方案组(心率65次/min,B组)。26... 详细信息

目的比较128层双源Ct冠状动脉成像(CtCA)方案检测管腔阻塞超过50%的冠状动脉狭窄的诊断性能和辐射量。方法前瞻性地将有症状的459例病人纳入CtCA检查。病人被随机分配为大螺距螺旋扫描与窄窗序列扫描的CtCA方案组(心率65次/min,B组)。267例病人的定量冠状动脉成像与CtCA的诊断性能进行比较。结果在A组[231例病人,男性146例,平均心率为(58±7)次/min]中,以冠状动脉段为单位,大螺距螺旋CtCA比序列CtCA的敏感度低(89%∶97%,P=0.01);特异度、阳性预测值和阴性预测值相当(分别为95%、62%、99%和96%、73%、100%,P>0.05),但辐射剂量更低[(1.16±0.60)msv∶(3.82±1.65)msv,P0.05),序列CtCA的辐射剂量低于回顾性CtCA[(6.12±2.58)msv∶(8.13±4.52)msv,Pt的序列CtCA扫描,以获得最佳的诊断准确性与合理可行的低辐射剂量。要点①128层双源Ct冠状动脉成像检查提供了多种不同的采集方案。②随机对照的采集方案揭示了最佳方案的选择策略。③选择适当的CtCA方案降低了辐射剂量,同时保证了高质量。④CtCA方案的选择应基于每例病人的特征。⑤前瞻性序列扫描方案是CtCA的首选。

关键词： Ct 冠状动脉成像冠状动脉疾病辐射剂量敏感性和特异性

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Ct冠状动脉钙化积分增加值预测冠心病

国际医学放射学杂志 2010年第6期 589-590页

作者： t.s.s.genders F.Pugliese N.R.Mollet W.B.Meijboom A.C.Weustink C.A.G.Mieghem 何珍 Department of Epidemiology Erasmus University Medical CenterP.O.Box 20403000 CARotterdamthe Netherlands

目的就已报道的阻塞性冠心病(CAD)病人出现新发的稳定性典型心绞痛或非典型心绞痛的预测模型进行验证,并评价Ct冠状动脉钙化积分(CtCs)的增加值。方法对阻塞性CAD诊断的临床预测规则进行文献检索,定义为常规冠状动脉造影显示至少1支血... 详细信息

目的就已报道的阻塞性冠心病(CAD)病人出现新发的稳定性典型心绞痛或非典型心绞痛的预测模型进行验证,并评价Ct冠状动脉钙化积分(CtCs)的增加值。方法对阻塞性CAD诊断的临床预测规则进行文献检索,定义为常规冠状动脉造影显示至少1支血管狭窄率≥50%。采用回归

关键词：冠状动脉疾病 X线Ct 冠状动脉钙化积分 Logistic模型诊断

Construction of 2D/2D ti_(3)C_(2)t_(x)MXene/Cds heterojunction with photothermal effect for efficient photocatalytic hydrogen production

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Journal of Materials science & technology 2024年第4期171卷 1-9页

作者： t.Y.Huang Z.Yang s.Y.Yang Z.H.Dai Y.J.Liu J.H.Liao G.Y.Zhong Z.J.Xie Y.P.Fang s.s.Zhang Key Laboratory for Biobased Materials and Energy of Ministry of Education Guangdong Laboratory for Lingnan Modern AgricultureCollege of Materials and EnergySouth China Agricultural UniversityGuangzhou 510643China school of Physics and Optoelectronics South China University of TechnologyGuangzhou 510640China school of Chemical Engineering and Energy technology Guangdong Provincial Key Laboratory of Distributed Energy SystemsDongguan University of TechnologyDongguan 523808China

the insensitivity of semiconductors to visible and infrared light is a key constraint on the utilization of light energy in photocatalytic *** photocatalysts with full-spectrum absorption through surface engineering is an effective approach to fully harnessing light energy in semiconductor ***,a novel stable ti_(3)C_(2)t_(x)MXene/Cds heterojunction catalyst is obtained by in-situ epitaxial growth of two-dimensional(2D)Cds nanosheets on 2D MXene interface via a solvothermal *** exceptional light absorption properties of MXene confer outstanding full-spectrum driven photocat-alytic hydrogen evolution capability upon the heterogeneous *** unique 2D/2D structure effectively mitigated the recombination of photogenerated carriers,enhancing the photocatalytic performance of the ***,the composite catalyst exhibits a significantly higher surface temperature of 80.4℃under visible light irradiation at an intensity of 0.1 W/cm^(2),which is 1.84 times higher than that of *** irradiation of visible and near infrared light,the composite catalyst with photothermal ef-fect demonstrates a remarkable hydrogen evolution rate of 65.4 mmol g^(-1)h^(-1),which is 7.2 times higher than that of Cds *** study introduces a novel approach for constructing full-spectrum absorption catalysts and expands the application of the photothermal effect in photocatalytic hydrogen evolution research.

关键词： two-dimensional structure Heterostructure Photothermal effect Photocatalyst Hydrogen evolution

Evaluation of red soil-bentonite mixtures for compacted clay liners

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第2期16卷 697-710页

作者： A.s.Devapriya t.thyagaraj Department of Civil Engineering Indian Institute of Technology MadrasChennai600036India

Compacted clay liners are an integral part of the waste landfills,which are provided to contain the leachate within the landfills and protect the surrounding ***,locally available natural soils are used for the construction of compacted clay liners if they satisfy the design ***,not all soils in their natural state satisfy all the design criteria for the liner ***,there is a definite need to modify the locally available natural soils by blending with bentonite to meet the required design criteria for the *** view of this,the present study evaluates the suitability of an Indian red soil enhanced with bentonite as a liner *** achieve this,a series of experiments were carried out using locally available red soil and ***,the suitability of the red soil was evaluated as a liner *** experimental results showed that the red soil met all the selection criteria stipulated by the Environmental Protection Agencies(EPAs)for the liners except the hydraulic conductivity ***,the red soil was mixed with bentonite contents of 10%,20%and 30%,and the red soil-bentonite mixtures were evaluated for their suitability for liners in their compacted ***,as the liners in the arid and semi-arid regions are subjected to moisture variations due to seasonal moisture fluctuations and other factors,the red soil-bentonite mixtures were subjected to wetdry cycles,and their suitability was evaluated after wet-dry *** experimental results revealed that all the red soil-bentonite mixtures met the stipulated EPA criteria for the liners in the as-compacted ***,the red soil-bentonite mixtures with 20%and 30%bentonite contents only satisfied the hydraulic conductivity requirement even after wet-dry *** experimental findings were supplemented with the microstructural insights captured through digital camera images,scanning electron microscopy(sEM),and mercury intrusion porosimetry(M

关键词： Compacted clay lines Hydraulic conductivity Wet-dry cycles Microstructure

Ion heat transport in electron cyclotron resonance heated L-mode plasma on the t-10 tokamak

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Plasma science and technology 2024年第4期26卷 52-60页

作者： V.A.KRUPIN M.R.NURGALIEV A.R.NEMEts I.A.ZEMtsOV s.D.sUNtsOV t.B.MYALtON D.s.sERGEEV N.A.sOLOVEV D.V.sARYCHEV D.V.RYJAKOV s.N.tUGARINOV N.N.NAUMENKO National Research Centre“Kurchatov Institute” Moscow 123182Russia Bauman Moscow state technical University Moscow 105005Russia Institution“Project Center ItER” Moscow 123098Russia JsC“sOLAR” Minsk 220034Belarus

Anomalous ion heat transport is analyzed in the t-10 tokamak plasma heated with electron cyclotron resonance heating(ECRH) in second-harmonic extra-ordinary mode. Predictive modeling with empirical scaling for Ohmical heat conductivity shows that in ECRH plasmas the calculated ion temperature could be overestimated, so an increase of anomalous ion heat transport is required. to study this effect two scans are presented: over the EC resonance position and over the ECRH power. the EC resonance position varies from the high-field side to the low-field side by variation of the toroidal magnetic field. the scan over the heating power is presented with on-axis and mixed ECRH regimes. Discharges with high anomalous ion heat transport are obtained in all considered regimes. In these discharges the power balance ion heat conductivity exceeds the neoclassical level by up to 10 times. the high ion heat transport regimes are distinguished by three parameters: the ratio te/ti, the normalized electron density gradient R/■, and the ion–ion collisionality νii~*. the combination of high te/ti, high νii~*, and R/■=6-10 results in values of normalized anomalous ion heat fluxes up to 10 times higher than in the low transport scenario.

关键词： tokamak L-mode electron cyclotron resonance heating ion heat transport

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Physics of porous materials under extreme laser-generated conditions

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Matter and Radiation at Extremes 2024年第3期9卷 1-3页

作者： V.t.tikhonchuk s.Weber Extreme Light Infrastructure ERIC ELI Beamlines Facility25241 DolníBrezanyCzech Republic CELIA University of Bordeaux33405 TalenceFrance

Porous materials offer unique possibilities for the production of plasmas with controlled density profiles for experiments on laser–matter *** are of growing relevance to many applications,such as inertial confinement fusion,fundamental research,and secondary *** the processes of transformation of a porous solid into a plasma is of fundamental interest and is needed for producing materials with desired properties.

关键词： interaction. properties. porous

tensor force impact on shell evolution in neutron-rich si and Ni isotopes

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Chinese Physics C 2024年第4期48卷 95-106页

作者： s.V.sidorov A.s.Kornilova t.Yu.tretyakova Faculty of Physics Lomonosov Moscow State UniversityMoscow 119991Russia skobeltsyn Institute of Nuclear Physics Lomonosov Moscow State UniversityMoscow 119991Russia

the influence of the tensor interaction of nucleons on the characteristics of neutron-rich silicon and nickel isotopes was studied in this *** forces are considered within the framework of the Hartree-Fock approach with the skyrme *** addition of a tensor component of interaction is shown to improve the description of the splittings between different single-particle states and decrease nucleon-nucleon pairing correlations in silicon and nickel *** attention was directed toward the role of isovector tensor forces relevant to the interaction of like nucleons.

关键词： nuclear shell model tensor interaction silicon isotopes nickel isotopes

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Conformally symmetric wormhole solutions supported by non-commutative geometry in f(Q,t)gravity

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Communications in theoretical Physics 2024年第2期76卷 111-124页

作者： Chaitra Chooda Chalavadi V Venkatesha N s Kavya s V Divya Rashmi Department of P.G.studies and Research in Mathematics Kuvempu UniversityShankaraghattaShivamogga 577451KarnatakaIndia Department of Mathematics Vidyavardhaka College of EngineeringMysuru—570002India

this paper investigates wormhole solutions within the framework of extended symmetric teleparallel gravity,incorporating non-commutative geometry,and conformal *** achieve this,we examine the linear wormhole model with anisotropic fluid under Gaussian and Lorentzian *** primary objective is to derive wormhole solutions while considering the influence of the shape function on model parameters under Gaussian and Lorentzian *** resulting shape function satisfies all the necessary conditions for a traversable ***,we analyze the characteristics of the energy conditions and provide a detailed graphical discussion of the matter contents via energy ***,we explore the effect of anisotropy under Gaussian and Lorentzian ***,we present our conclusions based on the obtained results.

关键词： traversable wormhole f(Q t)gravity energy conditions non-commutative geometry conformal motion

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Mathematical modelling of ball and plate system with experimental and correlation function-based model validation

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Control theory and technology 2024年第2期22卷 326-341页

作者： t.R.Dil Kumar s.J.Mija Department of Electrical Engineering National Institute of Technology CalicutKozhikode673601KeralaIndia

the ball and plate system is an inherently nonlinear under actuated benchmark system used for validating the performance of various control schemes. A mathematical model depicting the dynamics close to that of the system is very much required for such a test bed. In this correspondence, the complete nonlinear model, a simplified nonlinear model, and a linearized model of the ball and plate system are developed. the system comprises a ball and plate mechanism and a rotary servo unit. the ball and plate mechanism is modelled using the Euler–Lagrange method, whereas the rotary servo subsystem is modelled from the first principles. the nonlinear model of the combined system is developed by including the dynamics of the servo motor with gear and rolling resistance between the ball and the plate. the simplified nonlinear model of the system is obtained with suitable assumptions. the model is linearized around the operating point using the Jacobian. the validity of the developed models is investigated through correlation function analysis. the open-loop response of the three models, viz., nonlinear, simplified nonlinear, and linearized models, is analyzed in the MAtLAB/simulink platform. since the open-loop system is unstable, the experimental validation of the model is performed with a double-loop PsO (particle swarm optimization) PID control scheme.

关键词： Ball and plate system Correlation function Model validation Particle swarm optimization(PsO) PsO PID controller