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An Introduction Effect Evaluation Tool for Distributed Generators

第十一届全国日地空间物理学术讨论会

作者： W.Baumjohann h.Matsumoto R.Nakamura h.kojima A.Balogh h.Reme Space Research Institute Austrian Academy of Sciences A-8042 Graz Austria Research Institute for Sustainable humanosphere Kyoto University Uji Kyoto 611 -0011 Japan Space Research Institute Austrian Academy of Sciences A-8042 Graz Austria Research Institute for Sustainable humanosphere Kyoto University Uji Kyoto 611 -0011 Japan The Blackett Laboratory Imperial College Prince Consort Road London SW7 2BZ United Kingdom Centre d’Etude Spatiale des Rayonnements F-31028 Toulouse Cedex 4 France

＜正＞Slow shocks are a key component in theories of reconnection. We show an example of a slow shock in the Cluster dataset, observed in the magnetotail in the vicinity of the tail current sheet with flow direction reverse from earthward to tailward or versa. here we analyze several such events using Cluster observations from the near-Earth magnetotail. Multi-spacecraft analysis is applied to the observations, leading to a better estimate of the shock normal orientation;normal inflow and outflow speeds are calculated. Initial results suggest that taiward flows are accelerated across Petschek-type slow-mode shocks based on the Rankine-hugoniot shock jump conditions and the Walen relation. Eartward flows, however, tend to fail these tests. A possible explanation may be the obstacle posed by the higher magnetic field pressure of the inner magnetosphere.

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Journal of Energy and Power Engineering 2010年第9期4卷 41-48页

作者： h. kojima S. Takayama T. Matsui T. Katsuno Y. Fukuyama Fuji Electric Systems Co. Ltd 1 Fuji-machi Hino-city Tokyo 191-8502 Japan

This paper presents practical distribution system equipment models such as various distributed generators, voltage regulators, and loads for fast three phase unbalanced load flow calculation in distribution systems. The method can calculate voltage and current of distribution systems, in which distributed generators are introduced. The calculation time of the proposed method is about 40 times faster than that of the Newton-Raphson method. Moreover, an introduction effect evaluation tool for distributed generators using the proposed three phase unbalanced load flow calculation is presented. It provides various functions such as a power system network diagram creation function and a voltage profile chart display function. Therefore, the introduction effect evaluation of distributed generators in distribution systems can be evaluated quite easily.

关键词： Distribution system distributed generator distribution equipment model three phase unbalanced load flow calculation

Analysis of ESWs in upstream and downstream of slow-shock near reconnection X-line observed by Geotail mission

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Analysis of ESWs in upstream and downstream of slow-shock ne...

采用新型谐振结构的800Mhz高性能SAW滤波器

中国空间科学学会空间物理学专业委员会第十五届全国日地空间物理学研讨会

作者： Li,S.Y. Y.Omura IPSL Deng,X.h. h.kojima Y.Saito Zhang,S.F. Research Institute for Sustainable humanosphere Kyoto UniversityUjiKyoto 611-0011Japan College of Aerospace Science and Engineering National University of Defense Technology Nanchang University Department of Space Physics Wuhan University Institute of Space and Astronautical Sciences Japan Aerospace Exploration AgencySagamiharaKanagawa229-8510Japan

Analysis on electrostatic solitary waves(ESWs)observed in the upstream and downstream of the slow-shock near the magnetic reconnection diffusion region is *** show that the ESWs propagate outwards in the upstream region while inwards in the downstream *** amplitude of ESWs in the downstream is more than 6 times those in the upstream,suggesting that energy outwards from reconnection X-line is much larger than ***,observations show,that electron beams associated with ESWs,which are parallel to ambient magnetic are much stronger in the downstream than in the upstream region of slow *** of electron beams in both upstream and downstream are coherent with the propagation directions of *** are consistent with the generation mechanism of ESWs which are suggested to be related to electron *** result is helpful for solving the issue of ESWs’generation mechanism associated with magnetic *** also provides an important hint for the understanding of fast energy release during the magnetic reconnection process.

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压电与声光 1986年第2期 35-43页

作者： M.hikita h.kojima 刘一声日·日立公司中央研究所

本文叙述一种汽车电话无线电收发机用的新型高性能声表面波滤波器。为了实现新的滤波器结构和良好的器件特性,采用了低损耗加权技术的叉指换能器、新的谐振结构和计算机模拟程序设计等新技术。对材料的性能也进行了测试。通过实验获得... 详细信息

本文叙述一种汽车电话无线电收发机用的新型高性能声表面波滤波器。为了实现新的滤波器结构和良好的器件特性,采用了低损耗加权技术的叉指换能器、新的谐振结构和计算机模拟程序设计等新技术。对材料的性能也进行了测试。通过实验获得的声表面波滤波器,其中心频率为830Mhz;相对带宽3％;插入损耗低到3.5—4.0dB;旁瓣抑制>50dB。

关键词：滤波器高性能损耗汽车电话电子设备损失消耗 SAW 旁瓣抑制 Mhz

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)

Real-world efficacy and safety of tofacitinib treatment in Asian patients with ulcerative colitis

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World Journal of Gastroenterology 2024年第13期30卷 1871-1886页

作者： Kentaro kojima Kenji Watanabe Mikio Kawai Soichi Yagi Koji Kaku Maiko Ikenouchi Toshiyuki Sato Koji Kamikozuru Yoko Yokoyama Tetsuya Takagawa Masahito Shimizu Shinichiro Shinzaki Department of Gastroenterology Hyogo Medical UniversityNishinomiya 663-8501Japan Department of Gastroenterology Gifu University Graduate School of MedicineGifu 501-1194Japan Department of Internal Medicine for Inflammatory Bowel Disease The University of ToyamaToyama 930-0194Japan Center for Clinical Research and Education Hyogo Medical UniversityNishinomiya 663-8501Japan

BACKGROUND Real-world data on tofacitinib(TOF)covering a period of more than 1 year for a sufficient number of Asian patients with ulcerative colitis(UC)are *** To investigate the long-term efficacy and safety of TOF treatment for UC,including clinical *** We performed a retrospective single-center observational analysis of 111 UC patients administered TOF at hyogo Medical University as a tertiary inflammatory bowel disease *** consecutive UC patients who received TOF between May 2018 and February 2020 were *** were followed up until August *** primary outcome was the clinical response rate at week *** outcomes included clinical remission at week 8,cumulative persistence rate of TOF administration,colectomy-free survival,relapse after tapering of TOF and predictors of clinical response at week 8 and week *** The clinical response and remission rates were 66.3%and 50.5%at week 8,and 47.1%and 43.5%at week 48,*** overall cumulative clinical remission rate was 61.7%at week 48 and history of anti-tumor necrosis factor-alpha(TNF-α)agents use had no influence(P=0.25).The cumulative TOF persistence rate at week 48 was significantly lower in patients without clinical remission than in those with remission at week 8(30.9%vs 88.1%;Phin 4 wk after *** 6 patients with herpes zoster(hZ)developed the infection after achieving remission by *** TOF was more effective in UC patients with mild activity at baseline and its efficacy was not affected by previous treatment with anti-TNF-α*** relapsed patients responded again after re-increase of TOF and nearly half relapsed after tapering off *** attention is needed for tapering and h

关键词： Ulcerative colitis Tofacitinib Janus kinase inhibitor Real-world Biologics

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 Bi_(1-x-y)Gd_xDy_yO_(1.5) 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 University41522IsmailiaEgypt Ministry of higher Education and Scientific Research Aliraqia University10011BaghdadIraq

herein,we report the synthesis of a Dy-Gd co-doped cubic phase-stabilized Bi_(2)O_(3) solid electrolyte system via solid-state processing under atmospheric *** with Dy^(3+) and Gd^(3+) has been observed to significantly enhance the densification process during sintering for stabilization purposes,thereby improving the electrical properties of δ-Bi_2O_(3)-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 Bi_(1-x-y)Gd_(x)Dy_(y)O_(1.5)(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 Bi_(0.90)Gd_(0.05)Dy_(0.05)O_(1.5) has no significant ***,an evident increase in the pore formation is observed as the amount of Gd_(2O_(3) increases 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 Bi_2O_(3)solid electrolyte system was evaluated and analyzed in detail by using the electrochemical impedance spectroscopy(EIS) technique,Based on EIS and conductivity measurements,Bi_(0.75)Gd_(0.20)Dy_(0.05)O_(1.5) exhibits 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： Solid oxide fuel cells(SOFCs) Rare earths Solid-state processing Rietveld Fast Fourier transform(FFT) Electrochemical impedance spectroscopy(EIS)

Shell-model representations of the microscopic version of the Bohr-Mottelson collective model

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Communications in Theoretical Physics 2024年第8期76卷 79-90页

作者： h G Ganev Joint Institute for Nuclear Research DubnaRussia Institute of Mechanics Bulgarian Academy of SciencesSofiaBulgaria

The structure of the irreducible collective spaces of the group Sp(12,R),which many-particle nuclear states are classified according to the chain Sp(12,R)⊃U(6)⊃SO(6)⊃SU_(pn)(3)⊗SO(2)⊃SO(3)of the proton-neutron symplectic model(PNSM),is considered in *** chain of the PNSM was recently shown to correspond to a microscopic shell-model version of the Bohr-Mottelson collective *** construction of the relevant shell-model representations of the Sp(12,R)group along this chain is considered for three nuclei with varying collective properties and from different mass *** is shown that the SU_(pn)(3)basis states of the Sp(12,R)representations belonging to the SO(6)irreps with seniorityυ≥υ0,withυ0 denoting the maximal seniority SO(6)irrep contained in the Sp(12,R)bandhead,are always Pauli allowed,but organized in a different way into different SO(6)*** is in contrast to the case of filling the levels of the standard three-dimensional harmonic oscillator and using the plethysm *** the SU_(pn)(3)multiplets withinυhe present work are important for the practical application of the microscopic version of the Bohr-Mottelson collective model.

关键词： microscopic shell-model version of the Bohr-Mottelson model proton-neutron symplectic model Sp(12,R)dynamical algebra shell-model representations