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STUDY ON PREPARATION, COMPlEX PERMITTIVITY,PERMEABIlITY AND MICROWAVE PROPERTIES OF BaZnzCo(2-z)Fe16O27/SiO2 MICROCRYSTAllINE GlASS CERAMICS

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Acta Metallurgica Sinica(English letters) 2003年第6期16卷 421-427页

作者： h.J.zhang X.l.Jia X.Yao l.Y.zhang highTemperatureCeramicsInstitute ZhengzhouUniversityZhengzhou450052China FunctionalMaterialsResearchlaboratory TongjiUniversityShanghai200092China

BaZnzCo2-zFe16O27/SiO2 microcrystalline glass ceramics with Z=0.0, 0.5, 0.8 and 1.1 were prepared at temperature 1200℃ for 5h by citrate sol-gel process. The complex dielectric constant and complex permeability of BaZnzCo2-zFe16 O27/SiO2-paraffin wax composites had been measured. Both the complex dielectric constant and dielectric loss exhibit almost no variation with frequency in 0.1-6.0Ghz. The real part of permeability decreases with increasing frequency for all samples, and the imaginary part of permeability exhibits a clear resonance peak at 1.44Ghz for Co2 W/SiO2, 1.32Ghz for Zn0.5Co1.5 W/SiO2, 1.20Ghz for Zn0.8Co1.2W/SiO2, and 1.08Ghz for Zn1.1 Co0.9 W/SiO2. It is also showed that the content of zinc has a close effect on the magnetic properties of BaZnzCo2-zFe16O27/SiO2 microcrystalline glass ceramics, the greater the zinc content, the higher the values of imaginary part of permeability and magnetic loss.

关键词： BaZnz Co2-zFe16O27/SiO2 microcrystalline glass ceramics,sol-gel microwave property

Spatial transcriptomics combined with single-nucleus RNA sequencing reveals glial cell heterogeneity in the human spinal cord

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Neural Regeneration Research 2025年第11期20卷 3302-3316页

作者： Yali Chen Yiyong Wei Jin liu Tao Zhu Cheng Zhou Donghang zhang Department of Anesthesiology West China HospitalSichuan UniversityChengduSichuan ProvinceChina laboratory of Anesthesia and Critical Care Medicine National-Local Joint Engineering Research Center of Translational Medicine of AnesthesiologyWest China HospitalSichuan UniversityChengduSichuan ProvinceChina Department of Anesthesiology Longgang District Maternity&Child Healthcare Hospital of Shenzhen City(Longgang Maternity and Child Institute of Shantou University Medical College)ShenzhenGuangdong ProvinceChina Department of Anesthesiology Affiliated Hospital of Zunyi Medical UniversityZunyiGuizhou ProvinceChina

Glial cells play crucial roles in regulating physiological and pathological functions,including sensation,the response to infection and acute injury,and chronic neurodegenerative *** cells include astrocytes,microglia,and oligodendrocytes in the central nervous system,and satellite glial cells and Schwann cells in the peripheral nervous *** the greater understanding of glial cell types and functional heterogeneity achieved through single-cell and single-nucleus RNA sequencing in animal models,few studies have investigated the transcriptomic profiles of glial cells in the human spinal ***,we used high-throughput single-nucleus RNA sequencing and spatial transcriptomics to map the cellular and molecular heterogeneity of astrocytes,microglia,and oligodendrocytes in the human spinal *** explore the conservation and divergence across species,we compared these findings with those from *** the human spinal cord,astrocytes,microglia,and oligodendrocytes were each divided into six distinct transcriptomic *** the mouse spinal cord,astrocytes,microglia,and oligodendrocytes were divided into five,four,and five distinct transcriptomic subclusters,*** comparative results revealed substantial heterogeneity in all glial cell types between humans and ***,we detected sex differences in gene expression in human spinal cord glial ***,in all astrocyte subtypes,the levels of NEAT1 and ChI3l1 were higher in males than in females,whereas the levels of CST3 were lower in males than in *** all microglial subtypes,all differentially expressed genes were located on the sex *** addition to sex-specific gene differences,the levels of MT-ND4,MT2A,MT-ATP6,MT-CO3,MT-ND2,MT-ND3,and MT-CO_(2) in all spinal cord oligodendrocyte subtypes were higher in females than in ***,the present dataset extensively characterizes glial cell heterogeneity and offers a valuable resource for explo

关键词： astrocyte glial cell human microglia oligodendrocyte sex differentiation single-nucleus RNA sequencing spatial transcriptomics species variation spinal cord

A Geostrophic Empirical Mode Determined from Altimetry and hydrographic Observations in the Bifurcation Region of the NEC

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A Geostrophic Empirical Mode Determined from Altimetry and H...

Microstructural evolution during the progressive transformation-induced plasticity effect in a Fe-0.1C-5Mnmedium manganese steel

“海洋动力过程与天气、气候变化”联合学术年会

作者： Che Sun,l.zhang Institute of Oceanology,Chinese Academy of Sciences

The geopotential height of the sea surface is approximately a streamline and exhibits a tight empirical relationship with the hydrographic structure of the entire water column,as discovered by Sun and Watts(2001)in th... 详细信息

关键词： A Geostrophic Empirical Mode Determined from Altimetry and hydrographic Observations in the Bifurcation Region of the NEC

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 369-379页

作者： Mei zhang Wenhao li Yangfei Chen Yang Jiang Xiaofei Guo han Dong School of Materials Science and Engineering Shanghai UniversityShanghai 200444China State Key laboratory of Advanced Special Steel Shanghai UniversityShanghai 200444China

The microstructural evolution of a cold-rolled and intercritical annealed medium-Mn steel(Fe-0.10C-5Mn)was investigated during uniaxial tensile ***-situ observations under scanning electron microscopy,transmission electron microscopy,and X-ray diffraction analysis were conducted to characterize the progressive transformation-induced plasticity process and associated fracture initiation *** findings were discussed with the local strain measurements via digital image *** results indicated that lüders band formation in the steel was limited to 1.5%strain,which was mainly due to the early-stage martensitic phase transformation of a very small amount of the less stable large-sized retained austenite(RA),which led to localized stress concentrations and strain hardening and further retardation of *** small-sized RA exhibited high stability and progressively transformed into martensite and contributed to a stably extended Portevin-le Chatelier *** volume fraction of RA gradually decreased from 26.8%to 8.2%prior to *** the late deformation stage,fracture initiation primarily occurred at the austenite/martensite and ferrite/martensite interfaces and the ferrite phase.

关键词： medium-Mn steel retained austenite progressive transformation-induced plasticity effect local strain fracture initiation

ElECTROChEMICAl STUDY ON ThE lOCAlIZED CORROSION OF TWO DIFFERENT TEMPER lY12 AllOYS

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Acta Metallurgica Sinica(English letters) 2005年第5期18卷 609-619页

作者： F.h. Cao l. Guo l.J. zhang Z. zhang J. Q. zhang Department of Chemistry Yuquan Campus Zhejiang University Hangzhou 310027 China State Key laboratory for Corrosion and Protection of Metals Institute of Metal Research The Chinese Academy of Sciences Shenyang 110016 China

The corrosion behavior of two different aged lY12 alloys in EXCO （234g/l NaCl, 50g/l KNO3 0.1M hNO3） and MIl-h-600 （35g/l NaCl, 5g/l （Nh4）2SO4） solutions were studied using electrochemical impedance spectroscopy （EIS） in conjunction with SEM technique respectively, and the ph variation of the above accelerated corrosion solution during materials corroding was also measured to characterize the corrosion processes. At the beginning of corrosion, EIS plots exhibited two capacitive arcs in the high frequency range （Cd） and mediate frequency range （ Cf） originating from the original corroded surface and the newly formed interface respectively, and a low frequency inductive loop due to the relaxation phenomenon of reaction intermediates. In the EXCO,solution, the EIS results showed that once the exfoliation corrosion occurred, the inductive loop disappeared. The results also showed that the exfoliation corrosion susceptibility of state T6 is much higher than that of state T3, but the intergranular corrosion susceptibility has a reverse order. Based on the relationship of EIS results with SEM and metalloscopy morphologies of the corroding substrates and physic-chemical meaning of EIS parameters, an index （Cf/Cd） has been proposed to characterize the extent of the localized corrosion, which variation tallies with the real corrosion extent correctly. Meanwhile, good agreement was found between the experimental results and the electrochemical model proposed and, good coherence between the electrochemical features and the distribution type of constituent particles of corroding material was observed.

关键词： electrochemical impedance spectroscope lY12 alloy exfoliation corrosion intergranular corrosion

Continuous-variable quantum key distribution using orbital angular momenta

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Continuous-variable quantum key distribution using orbital a...

Secret information reconciliation based on check-node-based globally coupled low-density parity-check codes for continuous-variable quantum key distribution

第十八届全国量子光学学术会议

作者：金迪 Y.Guo l.zhang D.huang 中南大学 School of Information Science & Engineering Central South University

Orbital angular momentum（OAM） is an important physical quantity of photons. If a photon of a helically phased beam with an azimuthal phase dependence of the form exp（ilθ）, the photon can carry an OAM of l?. In principle, there is no theoretical upper limit on the azimuthal quantum numbers l, which could greatly increase information capacity. In this paper, we propose a scheme for continuous-variable quantum key distribution（CV-QKD） using OAM. Results indicate that increasing the dimension of OAM leads to an increased information capacity as well as higher the total secret key rate. Additionally, as a result of the existence of turbulence, the power of OAM beams will diffuse to beams with neighboring topological charges, resulting in the decrease of received power and impairing channel capacity. In order to mitigate the influence of atmospheric turbulence, a special coherent detection is used. It is found that both of the distorted orbital angular momentum and the distorted wavefront of a beam due to turbulence can be compensated. The normalized power spectrum of the detected OAMs also shows a significant improvement.

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Secret information reconciliation based on check-node-based ...

Effect of Mo Addition on Microstructural Characteristics in a Re-containing Single Crystal Superalloy

第十八届全国量子光学学术会议

作者：李伯鹏 Y.Guo l.zhang D.huang 中南大学 School of Information Science & Engineering Central South University

Check-node-based globally coupled low-density parity-check(CN-GC-lDPC) is a special type of lDPC codes. The CN-GC-lDPC’s Tanner graph comprises a set of disjoint Tanner graphs which are connected together by a group of overall check-nodes(CNs), called global CNs. Reconciliation is a significant procedure in a continuous-variable quantum key distribution(CV-QKD) system. In this paper, we propose a high performance reconciliation scheme through employing a modified two-phase local/global iterative decoding scheme based on CN-GC-lDPC. By using this reconciliation scheme, the CV-QKD system’s reconciliation efficiency can reach 98.48%. The gaps between the iterative decoding thresholds and the Shannon limits are very small. The proposed scheme has lower encoding complexity compared to the conventional reconciliation scheme. By using a graphics processing unit(GPU), the reconciliation scheme can reach a high speed for a CV-QKD system.

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Journal of Materials Science & Technology 2015年第2期31卷 143-147页

作者： X.G.liu l.Wang l.h.lou J.zhang Superalloys Division Institute of Metal ResearchChinese Academy of Sciences Shenyang National laboratory for Materials Science Institute of Metal ResearchChinese Academy of Sciences

The effect of Mo addition on microstructural characteristics of a nickel-base single crystal superalloy containing 4 wt% Re was investigated. The γ/γ’ partitioning ratios determined by energy dispersive spectrometer attached to a transmission electron microscope showed that the addition of Mo enhanced the partitioning of Re,W and Cr in the g matrix while decreased the concentration of Ta in the matrix. Synchrotron radiation diffraction was adopted to measure the γ/γ’ lattice misfit at room temperature. The results indicated that Mo addition changed the γ/γ’ lattice misfit towards larger negative as well as increased the tetragonal distortion of the γ lattice. Additionally,Mo addition led to microstructural instability and altered the precipitation behavior of topologically close-packed phases during 1100 C exposure. Instead of precipitating directly from the matrix,the μ phase was observed to be converted from the α phase which precipitated preferentially as a metastable intermediate in the alloy with high Mo content.

关键词： Superalloy Molybdenum Microstructure Partitioning

卵黄高磷蛋白α-淀粉酶抑制肽的制备、鉴定及酶抑制动力学分析

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食品工业科技 2025年第1期46卷 152-162页

作者：薛天睿吕彬斐张铭冉李灿张晓维天津科技大学食品科学与工程学院天津300457

为探索卵黄高磷蛋白肽(phosvitin phosphopeptide,PPP)对α-淀粉酶的抑制作用,使其能够调控血糖水平从而缓解Ⅱ型糖尿病,本研究以α-淀粉酶抑制率为指标酶解卵黄高磷蛋白制备PPP,利用酶抑制动力学实验分析PPP对α-淀粉酶的抑制类型,采... 详细信息

为探索卵黄高磷蛋白肽(phosvitin phosphopeptide,PPP)对α-淀粉酶的抑制作用,使其能够调控血糖水平从而缓解Ⅱ型糖尿病,本研究以α-淀粉酶抑制率为指标酶解卵黄高磷蛋白制备PPP,利用酶抑制动力学实验分析PPP对α-淀粉酶的抑制类型,采用液质联用鉴定后用分子对接筛选出高活性的α-淀粉酶抑制肽,最后验证其活性。结果表明,最优酶解条件为先经胰蛋白酶(加酶量7000 U/g)再经胃蛋白酶(加酶量60000 U/g)分别酶解6 h,制得的PPP在浓度7.81×10-3 mg/ml时具有最高α-淀粉酶抑制率70.69%±1.71%。PPP对α-淀粉酶的抑制类型为混合型抑制。鉴定筛选出了两种新型的高活性α-淀粉酶抑制肽FGTEPDAK和IWGR,经验证其IC50值分别为(0.80±0.14)×10-3 mg/ml和(1.80±0.31)×10-3 mg/ml,极显著低于阳性对照阿卡波糖(3.17±0.47)×10-3 mg/ml(P<0.01)。本研究揭示PPP可作为新型降糖物质,应用于缓解Ⅱ型糖尿病的功能性食品开发中。

关键词：卵黄高磷蛋白肽复合酶解 α-淀粉酶抑制剂分子对接酶抑制动力学