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Chinese Physics Letters 1995年第8期12卷 485-488页

作者： ZHAO Pingbo LI Bozang pu fuke Institute of Physics Academia SinicaBeijing 100080 also International Center for Materials Physics Academia SinicaShenyang 110015

In virtue of Mott mechanism,we calculate the giant magnetoresistance(GMR)in Fe/Cr *** results show that the GMR oscillations with the thickness of the ferromagnetic layer is due to the finite size effect of magnetic i... 详细信息

关键词： magnetic ferromagnetic finite

Spontaneous Magnetization of Small Heisenberg System

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Chinese Physics Letters 1994年第11期11卷 705-708页

作者： SUN Jirong WEI Yunian YI Sunsheng pu fuke(Fu-cho pu) State Key Laboratory for Magnetism Academia SinicaBeijing 100080 Institute of Physics Academia SinicaBeijing 100080 China Center of Advanced Science and Technology(World Laboratory) P.O.Box 8730Beijing 100080

Based upon the spin-wave theory,the influence of the size of a cubic Heisenberg system on the spontaneous magnetization was *** was found that the overall influence of finite size has a tendency to promote the excitation of spin-wave if the free boundary condition is applied.A comparison between the calculation and the experimental results was also given.

关键词： Heisenberg wave excitation

BIFURCATION SOLUTIONS OF BROWN’S EQUATION

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Science in China,Ser.A 1982年第3期 272-284页

作者：蒲富恪李伯臧 Institute of Physics Academia Sinica

we have succeeded in obtaining the maximum bifurcation point {0, Hn} and the associated bi-furcation solutions {u,H} of Brown’s oquation in the symmctric case by generalizing and applyingthe perturbation method of the bifurcation theory. This is closely related to the solution of theproblem of nucleation in magnetization reversal. It turns out that the bifurcation solutions u（r, H）can be expressed as±D2（Hn-H）1/2uo,where constants Hn and D2 are determined by the magnetieproperties and the geometry of the ferromagnetic body, while the two-dimensional vector function uodepends only on the geometry.

关键词： mode BIFURCATION SOLUTIONS OF BROWN’S EQUATION

MICROMAGNETIC RESEARCH ON THE BEHAVIOR OF NUCLEATION IN MAGNETIZATION REVERSAL

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Science in China,Ser.A 1982年第4期 402-412页

作者：蒲富恪李伯臧 Institute of Physics Academia Sinica

In this paper it is shown that the problem of nucleation in magnetization reversal inthe scheme of Brown’s equation is one of the typical problems of bifurcation. After adetailed analysis for the stability of the bifurcation solutions of Brown’s equation, whichwe have obtained elsewhere, it turns out that the nucleation field is the maximum bifurca-tion point, and the nucleation fields as well as the magnetization reversal modes obtainedby Brown, Aharoni and Shtrikman from the linearization approximation are included in ourresults obtained from the first order perturbation approximation in bifurcation theory. Bygoing beyond linear approximation, the behavior of nuclcation in magnetization reversal hasbeen studied. We have arrived at the conclusion that the demagnetization in the neighbor-hood of the nucleation field is described by either a continuous bifurcation solution or adiscontinuous jump and we have also obtained the conditions under which the nucleationtakes place continuously or discontinuously.

关键词： MICROMAGNETIC RESEARCH ON THE BEHAVIOR OF NUCLEATION IN MAGNETIZATION REVERSAL mode

BIFURCATION SOLUTIONS OF BROWN'S EQUATIONS AND PROBLEMS OF NUCLEATION IN MAGNETIZATION REVERSAL AND OF FORMATION OF INCIPIENT MAGNETIC DOMAIN

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Chinese Science Bulletin 1981年第3期26卷 207-212页

作者：蒲富恪李伯臧 Institute of Physics Academia Sinica -H_y=0. Then for any value of H_x and any size of D the saturation state or signle-domain state u=0 and γ=1

We assume that in general D is an ellipsoid （including sphere, infinite elliptic cylinder and infinite plane sheet as particular cases）, H is homogeneous and [（?）g/（?）a]γ=1—hx[k]—Hx=[（?）g/（?）β]γ=1—hy[k... 详细信息

关键词： saturation infinite cylinder elliptic ellipsoid magnetization neighborhood assume sheet reversal

AN IMPROVEMENT IN THE THEORY OF MICROMAGNETISM FOR FERROMAGNETS

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Science in China,Ser.A 1988年第11期 1354-1363页

作者：李伯臧蒲富恪 Institute of Physics Academia Sinica Beijing Center of Theoretical Physics CCAST (World Lab.) and Intitute of Physics

On the basis of the effective-field method, an improvement is made in micromagnetics which was established by Brown for the isothermal process of single-crystalline homogeneous ferromagnet. The improved theory enables us to consider the effect of magnetic and structural inhomogeneity in ferromagnet and to study the process with changing temperature. The boundary conditions for equations of motion and equilibrium distribution of magnetization vector field are derived and discussed.

关键词： micromagnetism effective-field inhomogeneity.

SUPER-ALGEBRA APPROACH TO THREE-WAVE INTERACTION MODEL

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Chinese Science Bulletin 1988年第21期33卷 1772-1777页

作者：王玉鹏蒲富恪 Institute of Physics Academia Sinica Reijing Center of Theorctical Physics CCAST (World Lab.) Beijing Institute of Physics Academia Sinica Beijing

Ⅰ. INTRODUCTION The model of three-wave interaction plays an important role in plasma physics and nonlinear optics. Its classical cases and quantum cases have been studied by many authors. As shown in [4], the quantu... 详细信息

关键词： inverse scattering transform three-wave interaction completely integrable model super algebra

A new horizon for neuroscience:terahertz biotechnology in brain research

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Neural Regeneration Research 2025年第2期20卷 309-325页

作者： Zhengping pu Yu Wu Zhongjie Zhu Hongwei Zhao Donghong Cui Shanghai Key Laboratory of Psychotic Disorders Shanghai Mental Health CenterShanghai Jiao Tong University School of MedicineShanghaiChina Department of Psychiatry Kangci Hospital of JiaxingTongxiangZhejiang ProvinceChina Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghaiChina Key Laboratory of Interfacial Physics and Technology Shanghai Institute of Applied PhysicsChinese Academy of ScienceShanghaiChina National Facility for Protein Science in Shanghai Shanghai Advanced Research InstituteChinese Academy of SciencesShanghaiChina

Terahertz biotechnology has been increasingly applied in various biomedical fields and has especially shown great potential for application in brain *** this article,we review the development of terahertz biotechnology and its applications in the field of *** evidence indicates promising prospects for the use of terahertz spectroscopy and terahertz imaging techniques in the diagnosis of amyloid disease,cerebrovascular disease,glioma,psychiatric disease,traumatic brain injury,and myelin *** vitro and animal experiments have also demonstrated the potential therapeutic value of terahertz technology in some neuropsychiatric *** the precise underlying mechanism of the interactions between terahertz electromagnetic waves and the biosystem is not yet fully understood,the research progress in this field shows great potential for biomedical noninvasive diagnostic and therapeutic ***,the biosafety of terahertz radiation requires further exploration regarding its two-sided efficacy in practical *** review demonstrates that terahertz biotechnology has the potential to be a promising method in the field of neuropsychiatry based on its unique advantages.

关键词： biological effect brain neuron neuropsychiatry neuroscience non-thermal effect terahertz imaging terahertz radiation terahertz spectroscopy terahertz technology

NOX4 exacerbates Parkinson's disease pathology by promoting neuronal ferroptosis and neuroinflammation

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Neural Regeneration Research 2025年第7期20卷 2038-2052页

作者： Zhihao Lin Changzhou Ying Xiaoli Si Naijia Xue Yi Liu Ran Zheng Ying Chen Jiali pu Baorong Zhang Department of Neurology The Second Affiliated HospitalZhejiang University School of MedicineHangzhouZhejiang ProvinceChina

Parkinson's disease is primarily caused by the loss of dopaminergic neurons in the substantia nigra ***,a novel form of regulated cell death characterized by iron accumulation and lipid peroxidation,plays a vital role in the death of dopaminergic ***,the molecular mechanisms underlying ferroptosis in dopaminergic neurons have not yet been completely *** oxidase 4 is related to oxidative stress,however,whether it regulates dopaminergic neuronal ferroptosis remains *** aim of this study was to determine whether NADPH oxidase 4 is involved in dopaminergic neuronal ferroptosis,and if so,by what *** found that the transcriptional regulator activating transcription factor 3 increased NADPH oxidase 4 expression in dopaminergic neurons and astrocytes in an 1-methyl-4-phenyl-1,2,3,6 tetrahydropyridine-induced Parkinson's disease *** oxidase 4 inhibition improved the behavioral impairments observed in the Parkinson's disease model animals and reduced the death of dopaminergic ***,NADPH oxidase 4 inhibition reduced lipid peroxidation and iron accumulation in the substantia nigra of the Parkinson's disease model ***,we found that NADPH oxidase 4 interacted with activated protein kinase Cαto prevent ferroptosis of dopaminergic ***,by lowering the astrocytic lipocalin-2 expression,NADPH oxidase 4 inhibition reduced 1-methyl-4-phenyl-1,2,3,6 tetrahydropyridine-induced *** findings demonstrate that NADPH oxidase 4 promotes ferroptosis of dopaminergic neurons and neuroinflammation,which contribute to dopaminergic neuron death,suggesting that NADPH oxidase 4 is a possible therapeutic target for Parkinson's disease.

关键词： dopaminergic neuron ferroptosis NADPH oxidase 4(NOX4) neuroinflammation Parkinson's disease

Effects of aggregate size distribution and carbon nanotubes on the mechanical properties of cemented gangue backfill samples under true triaxial compression

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 311-324页

作者： Qian Yin Fan Wen Zhigang Tao Hai pu Tianci Deng Yaoyao Meng Qingbin Meng Hongwen Jing Bo Meng Jiangyu Wu State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering China University of Mining and TechnologyXuzhou 221116China State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines Anhui University of Science and TechnologyHuainan 232001China State Key Laboratory for Geomechanics&Deep Underground Engineering China University of Mining and Technology(Beijing)Beijing 100083China Key Laboratory of Xinjiang Coal Resources Green Mining Ministry of EducationXinjiang Institute of EngineeringUrumqi 830023China

The mechanical behavior of cemented gangue backfill materials(CGBMs)is closely related to particle size distribution(PSD)of aggregates and properties of cementitious ***,the true triaxial compression tests,CT scanning,SEM,and EDS tests were conducted on cemented gangue backfill samples(CGBSs)with various carbon nanotube concentrations(P_(CNT))that satisfied fractal theory for the PSD of *** mechanical properties,energy dissipations,and failure mechanisms of the CGBSs under true triaxial compression were systematically *** results indicate that appropriate carbon nanotubes(CNTs)effectively enhance the mechanical properties and energy dissipations of CGBSs through micropore filling and microcrack bridging,and the optimal effect appears at P_(CNT)of 0.08wt%.Taking PSD fractal dimension(D)of 2.500 as an example,compared to that of CGBS without CNT,the peak strength(σ_(p)),axial peak strain(ε_(1,p)),elastic strain energy(Ue),and dissipated energy(U_(d))increased by 12.76%,29.60%,19.05%,and90.39%,***,excessive CNTs can reduce the mechanical properties of CGBSs due to CNT agglomeration,manifesting a decrease inρ_(p),ε_(1,p),and the volumetric strain increment(Δε_(v))when P_(CNT)increases from 0.08wt%to 0.12wt%.Moreover,the addition of CNTs improved the integrity of CGBS after macroscopic failure,and crack extension in CGBSs appeared in two modes:detour and pass through the ***σ_(p)and U_(d)firstly increase and then decrease with increasing D,and porosity shows the opposite ***ε_(1,p)andΔε_(v)are negatively correlated with D,and CGBS with D=2.150 has the maximum deformation parameters(ε_(1,p)=0.05079,Δε_(v)=0.01990)due to the frictional slip effect caused by coarse *** increasing D,the failure modes of CGBSs are sequentially manifested as oblique shear failure,"Y-shaped"shear failure,and conjugate shear failure.

关键词： cemented gangue backfill materials particle size distribution true triaxial compression test carbon nanotubes mechanical properties failure modes