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热喷涂技术 2013年第4期5卷 60-66,38页

作者： J.Kitamura T.Tosaki h.mizuno 黄凌峰 FUJIMI INCORPORATED

MoB/CoCr涂层具有较高的耐熔融锌侵蚀的能力,并被广泛地应用于钢铁工业镀锌生产线中[1].然而在实验室测试中,这种涂层有时还没有显示出其原有特性就失效了.研究发现,这些失效的试样往往具有较高的孔隙率,导致了熔融Zn通过孔洞加速渗透... 详细信息

MoB/CoCr涂层具有较高的耐熔融锌侵蚀的能力,并被广泛地应用于钢铁工业镀锌生产线中[1].然而在实验室测试中,这种涂层有时还没有显示出其原有特性就失效了.研究发现,这些失效的试样往往具有较高的孔隙率,导致了熔融Zn通过孔洞加速渗透对基体钢材产生腐蚀并使涂层脱离.这表明,在实际应用中,高密度涂层对于展现其耐蚀性与保证质量的极度重要性.在本文中,我们通过优化粉末性能并采用JP-5000超音速火焰喷涂制备了高密度MoB/CoCr涂层.我们通过盐雾试验来评估涂层的致密性.最佳密度的涂层在经过300小时的盐雾试验后,其低碳钢基体材料没有发生锈蚀.另一方面,多孔的涂层在经过24～48小时的盐雾试验后,其基体材料出现了锈蚀.经盐雾试验验证的最佳涂层在工业镀锌浴中浸没90天后（＞2000小时）没有发生失效.

关键词：镀锌超音速火焰涂层

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船舶主机的动态控制

船电技术 1995年第5期15卷 53-57,63页

作者： M.Itoh T.Okawa h.mizuno N.mizuno M.horigone K.Obtsu 顾杰仁

本文叙述了在严酷海况下,船舶主机的转速控制系统,此控制器是为已带有调速器的主机系统而设计的.一旦给出了主机期望的转速之后,控制器给调速器计算出一个动态参考转速.该参考值补偿了可估计的扰动.本文结合一些仿真结果描述控制算法.... 详细信息

本文叙述了在严酷海况下,船舶主机的转速控制系统,此控制器是为已带有调速器的主机系统而设计的.一旦给出了主机期望的转速之后,控制器给调速器计算出一个动态参考转速.该参考值补偿了可估计的扰动.本文结合一些仿真结果描述控制算法.其主机模型由东京商船大学训练船Shiji丸的实验数据获得。

关键词：船舶柴油机转速控制模型参考控制

Radioactive Beam Project at hIM AC

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Radioactive Beam Project at HIM AC

采用高导热碳化硅蜂窝结构的先进非旁通废热回收系统的开发

The Second Asian Particle Accelerator Conference

作者： A.Kitagawa M.Endo T.Kanai M.Kanazawa S.Minohara T.Murakami K.Noda M.Suda T.Tomitani M.Torikoshi E.Urakabe h.mizuno K.hanawa Y.Iseki K.Sato Y.hirata A.Komiyama National Institute of Radiological Sciences Japan National Institute of Radiological Sciences Japan National Institute of Radiological Sciences Japan National Institute of Radiological Sciences Japan National Institute of Radiological Sciences Japan National Institute of Radiological Sciences Japan National Institute of Radiological Sciences Japan National Institute of Radiological Sciences Japan National Institute of Radiological Sciences Japan National Institute of Radiological Sciences Japan National Institute of Radiological Sciences Japan National Institute of Radiological Sciences Japan National Institute of Radiological Sciences Japan National Institute of Radiological Sciences Japan National Institute of Radiological Sciences Japan National Institute of Radiological Sciences Japan National Institute of Radiological Sciences Japan

＜正＞ heavy-ion radiotherapy gives a good localized dose distribution just on a cancer *** to emphasize this advantage,the verification system of a particle range and anirradiated area in a human body has been developed at *** idea is that the stoppingposition of a short-lived positron emitting nuclei,such as 11C,150 or 19Ne,can be preciselydetected by measuring annihilation *** verification system,which consists of asecondary beam course,a beam irradiation system,a patient’s positioning system,and

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汽车与新动力 2020年第3期3卷 66-70页

作者： [日]T.SAKUMA [日]M.YOShIhARA [日]T.KAWAGUChI [日]T.hAMADA [日]h.mizuno [日]D.KIMURA 孙丹红(译) 田永海(译) 不详

废热回收(EhR)系统是改善燃油经济性和车内舒适性的有效且充满吸引力的方法之一,对于冬季的混合动力汽车尤为如此。多数传统旁通系统的热执行器都含有旁通管和旁通阀,从而导致EhR系统的体积和质量都较大。在有效改善EhR系统废热回收性... 详细信息

废热回收(EhR)系统是改善燃油经济性和车内舒适性的有效且充满吸引力的方法之一,对于冬季的混合动力汽车尤为如此。多数传统旁通系统的热执行器都含有旁通管和旁通阀,从而导致EhR系统的体积和质量都较大。在有效改善EhR系统废热回收性能的同时,必须使系统的尺寸和质量最小化。非旁通系统回收来自废气的热量,对其废热回收性能进行设置,以确保在高发动机负荷下不超过散热器的冷却能力,从而防止整车动力系统过热。对于非旁通系统来说,在高发动机负荷或高冷却液温度条件下,减少回收热量及在低发动机负荷或低冷却液温度条件下增加回收热量是必不可少的。提出了一种能取代原有旁通阀机构的先进非旁通EhR系统,该系统采用的是能根据冷却液温度或发动机负荷自动限制回收热量的双层冷却液通道结构,可实现发动机预热阶段的有效废热回收及高发动机负荷或高冷却液温度条件下的有效散热。介绍了该先进非旁通EhR系统的基本结构。试验结果表明,该系统在冷起动阶段具有良好的废热回收性能,在发动机高负荷下具有良好的散热性能。

关键词：废热回收非旁通蜂窝结构碳化硅

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)

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

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