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Lung-RADS 4X分级:是否改善亚实性结节中恶性结节的预测

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国际医学放射学杂志 2017年第5期 592-593页

作者： K.Chung C.Jacobs E.T.Scholten J.M.Goo h.prosch N.Sverzellati 武晔 Department of Radiology and Nuclear Medicine Radboud University Nijmegen Medical Center

摘要目的评估肺部CT筛查报告和数据系统(Lung-RADS)中4X分级较3、4A、和4B分级对亚实性结节(SSN)良恶性鉴别的额外价值。材料与方法纳入国家肺癌试验的

关键词：实性结节 SSN Lung-RADS 4X

新型冠状病毒肺炎病人与放射科——来自欧洲放射学会和欧洲胸科影像学会的建议

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国际医学放射学杂志 2020年第6期 745-745页

作者：朱超 M.P.Revel A.P.Parkar h.prosch M.Silva N.Sverzellati F.Gleeson Department of Radiology Cochin HospitalUniversité de Paris

摘要这份来自欧洲放射学会和欧洲胸科影像学会的文件旨在介绍新型冠状病毒肺炎的主要影像学特征,以及CT扫描在早期诊断中的作用,特别是描述既能使人们认识该病

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肋骨展开——一种快速探查肋骨骨折的CT可视化算法:对创伤病人敏感性及特异性的影响

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国际医学放射学杂志 2015年第5期 489-489页

作者： h.Ringl M.Lazar M.Tpker R.Woitek h.prosch U.Asenbaum 李弋 Department of Biomedical Imaging and Image-guided Therapy Medical University of Vienna

摘要目的评估放射科医生应用曲面重组(CPR)及标准的多平面重组(MPR)对创伤病人CT肋骨骨折检出率的比较。材料与方法回顾性分析220例创伤病人(男146例,女74例)的CT影像,应用软件对肋骨进行CPR重组。病人被平均分为2组,其中16例病人影像... 详细信息

摘要目的评估放射科医生应用曲面重组(CPR)及标准的多平面重组(MPR)对创伤病人CT肋骨骨折检出率的比较。材料与方法回顾性分析220例创伤病人(男146例,女74例)的CT影像,应用软件对肋骨进行CPR重组。病人被平均分为2组,其中16例病人影像因分割失败被排除,最终剩余A组107例,B组97例。由2名放射科医生分别对2组影像进行独立评估,A组应用CPR重组,B组应用MPR重组,

关键词：肋骨骨折 MPR 创伤病人敏感性 CT

CT引导下肺活检印片细胞学标本动态远程细胞学评价的可行性研究

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国际医学放射学杂志 2011年第6期 601-601页

作者： h.prosch E.hoffmann K.Bernhardt J.Schalleschak E.Schober M.Rowhani 章作铨 Department of Radiology Medical University of ViennaVienna General HospitalWhringergürtel 18-221090 ViennaAustria

目的评估由放射科医师在活检现场操作显微镜观察CT引导下肺穿刺活检标本,然后由非现场的细胞学家通过动态远程细胞学诊断系统进行远程细胞学诊断的可行性。材料与方法分别由一名放射诊断医师和一名放射技师

关键词： CT引导穿刺活检现场细胞学评价远程细胞学肺肺结节

Free vibration and buckling analysis of polymeric composite beams reinforced by functionally graded bamboo fbers

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Applied Mathematics and Mechanics(English Edition) 2024年第3期45卷 543-562页

作者： h.M.FEIZABAD M.h.YAS Department of Mechanical Engineering Razi UniversityKermanshah ***Iran

Natural fibers have been extensively researched as reinforcement materials in polymers on account of their environmental and economic advantages in comparison with synthetic fibers in the recent *** fibers are renowned for their good mechanical properties,abundance,and short cycle *** beams are one of the fundamental structural components and are susceptible to mechanical loads in engineering applications,this paper performs a study on the free vibration and buckling responses of bamboo fiber reinforced composite(BFRC)beams on the elastic *** different functionally graded(FG)layouts and a uniform one are the considered distributions for unidirectional long bamboo fibers across the *** elastic properties of the composite are determined with the law of *** hamilton’s principle,the governing equations of motion are *** generalized differential quadrature method(GDQM)is then applied to the equations to obtain the *** achieved outcomes exhibit that the natural frequency and buckling load values vary as the fiber volume fractions and distributions,elastic foundation stiffness values,and boundary conditions(BCs)and slenderness ratio of the beam ***,a comparative study is conducted between the derived analysis outcomes for BFRC and homogenous polymer beams to examine the effectiveness of bamboo fibers as reinforcement materials,demonstrating the significant enhancements in both vibration and buckling responses,with the exception of natural frequencies for cantilever beams on the Pasternak foundation with the FG-◇fiber ***,the obtained analysis results of BFRC beams are also compared with those for carbon nanotube reinforced composite(CNTRC)beams found in the literature,indicating that the buckling loads and natural frequencies of BFRC beams are lower than those of CNTRC beams.

关键词： bamboo fiber free vibration buckling analysis functionally graded(FG)beam elastic foundation generalized differential quadrature method(GDQM)

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holographic dark energy in non-conserved gravity theory

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Communications in Theoretical Physics 2024年第4期76卷 126-133页

作者： h R Fazlollahi Institute of Gravitation and Cosmology Peoples Friendship University of Russia(RUDN University)6 Miklukho-Maklaya StMoscow117198Russia

Recently, reconsidering the Rastall idea T_(μ;νν)^(v)=α_(,μ) through relativistic thermodynamics gives a new form for the scalar field α which led us to construct modern modified theory of gravity debugged ‘non-conserved gravity theory’ Fazlollahi 2023 Euro. Phys. J. C 83 923. This theory unlike other modified theories of gravity cannot directly explain the current acceleration expansion in the absence of the cosmological constant and or existence of other forms of dark energy. hence, in this study we have reinvestigated holographic dark energy Ρ_(X)~h^(2) in the non-conserved theory of gravity. In this context, the density and pressure of dark energy depend on the non-conserved term and density of the dust matter field. As shown, due to non-conservation effects on large-scale structures, unlike the original holographic model, our model onsets an acceleration epoch for the current Universe satisfies observations. Moreover, the interaction and viscous scenarios are studied for this model.

关键词： non-conserved gravity covariant form of thermodynamics holographic dark energy

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Novel synthesis of stabilized Bi1-x-yGdxDyyO1.5 solid electrolytes with enhanced conductivity for intermediate temperature solid oxide fuel cells（SOFCs）

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Journal of Rare Earths 2024年第10期42卷 1903-1911页

作者： Ahmed h.Ibrahim Yehia M.Abbas h.A.Ayoub Marwa h.Ali Mustafa Aldoori Materials Science Laboratory Physics DepartmentFaculty of ScienceSuez Canal University Ministry of higher Education and Scientific Research Aliraqia University

herein,we report the synthesis of a Dy-Gd co-doped cubic phase-stabilized Bi2O3solid electrolyte system via solid-state processing under atmospheric *** with Dy3+and Gd3+has been observed to significantly enhance the densification process during sintering for stabilization purposes,thereby improving the electrical properties of δ-Bi2O3-type *** synthesized ceramics were characterized using X-ray diffraction（XRD）,field emission scanning electron microscopy-energy dispersive X-ray spectroscopy（FESEM-EDX）,thermal gravimetry/differential thermal analysis（TG/DTA）,and the four-point probe technique（4PPT）.XRD analysis reveals that the samples Bi1-x-yGdxDyyO1.5（y=0.05/x=0.05,0.10,0,15,and 0.20,and x=0.05/y=0.10,0.15,and 0.20） exhibit a stable face-centered cubic δ-phase and a mixed-phase crystallographic *** XRD analysis of the stabilized δ-phase suggests that the prepared oxides show a face-centered cubic（FCC） structure with a space group of *** micrographs reveal that the composition Bi0.90Gd0.05Dy0.05O1.5has no significant ***,an evident increase in the pore formation is observed as the amount of Gd2O3increases until it reaches 20%.This finding suggests that dense pellets are formed during the sintering process at 900-1000℃.The DTA analyses were performed to verify the phase stability,which agrees with the XRD *** electrochemical performance of the synthesized Dy-Gd co-doped Bi2O3solid electrolyte system was evaluated and analyzed in detail by using the electrochemical impedance spectroscopy（EIS） technique,Based on EIS and conductivity measurements,Bi0.75Gd0.20Dy0.05O1.5exhibits the lowest activation energy of 0.519 eV and the highest conductivity value of 0.398 S/cm at 627℃compared to the other samples;this composition can be used as a solid electrolyte for intermediatetemperature solid oxide fuel cells（SOFCs）.

关键词： Electrochemical impedance spectroscopy (EIS) Fast Fourier transform (FFT) Rare earths Rietveld Solid oxide fuel cells (SOFCs) Solid-state processing

Convexification of hybrid AC-DC Optimal Power Flow with Line-Commutated Converters

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CSEE Journal of Power and Energy Systems 2024年第2期10卷 617-628页

作者： hongyuan Liang Zhigang Li J.h.Zheng Q.h.Wu School of Electric Power Engineering South China University of TechnologyGuangzhou 510641China

Line-commutated converter (LCC)-based high-voltage DC (hVDC) systems have been integrated with bulk AC power grids for interregional transmission of renewable power. The nonlinear LCC model brings additional nonconvexity to optimal power flow (OPF) of hybrid AC-DC power grids. A convexification method for the LCC station model could address such nonconvexity but has rarely been discussed. We devise an equivalent reformulation for classical LCC station models that facilitates second-order cone convex relaxation for the OPF of LCC-based AC-DC power grids. We also propose sufficient conditions for exactness of convex relaxation with its proof. Equivalence of the proposed LCC station models and properties, exactness, and effectiveness of convex relaxation are verified using four numerical simulations. Simulation results demonstrate a globally optimal solution of the original OPF can be efficiently obtained from relaxed model.

关键词： AC-DC power system convex relaxation linecommutated converter optimal power flow second-order cone programming