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Superconducting anisotropy and vortex pinning in CaKFe_(4)As_(4) and KCa_(2)Fe_(4)As4F_(2)

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Chinese Physics B 2021年第2期30卷 131-137页

作者： A B Yu Z Huang C Zhang Y F Wu T Wang T xie C liu H li W Peng H Q luo G Mu H xiao l x you T Hu State Key laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China Beijing Academy of Quantum Information Sciences Beijing 100193China Center for High Pressure Science and Technology Advanced Research Beijing 100094China CAS Center for Excellence in Superconducting Electronics(CENSE) Shanghai 200050China University of Chinese Academy of Sciences Beijing 100049China Beijing National laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Songshan lake Materials laboratory Dongguan 523808China

The vortex pinning determining the current carrying capacity of a superconductor is an important property to the applications of superconducting *** layered superconductors,the vortex pinning can be enhanced by a strong interlayer interaction in accompany with a suppression of superconducting anisotropy,which remains to be investigated in iron based superconductors(FeSCs)with the layered ***,based on the transport and magnetic torque measurements,we experimentally investigate the vortex pinning in two bilayer FeSCs,CaKFe_(4)As_(4)(Fe1144)and KCa_(2)Fe_(4)As4F_(2)(Fe12442),and compare their superconducting anisotropyγ.While the anisotropyγ≈3 for Fe1144 is much smaller thanγ≈15 in Fe12442 around Tc,a higher flux pinning energy as evidenced by a higher critical current density is found in Fe1144,as compared with the case of *** combination with the literature data of Ba_(0.72)K_(0.28)Fe2As_(2) and Nd Fe As_(O0.82)F_(0.18),we reveal an anti-correlation between the pinning energy and the superconducting anisotropy in these Fe *** results thus suggest that the interlayer interaction can not be neglected when considering the vortex pinning in Fe SCs.

关键词： iron based superconductors vortex pinning anisotropy

微波近场显微镜及其在超导薄膜和衬底材料特性无损检测上的应用

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低温物理学报 1999年第4期21卷 39-43页

作者：冯一军刘雷刘庆国尤立星杨森祖吴培亨南京大学电子科学与工程系

高温超导薄膜的微波性能受制备工艺和衬底材料性能的影响，常常出现空间不均匀分布，因此，无损检测大面积超导薄膜及衬底材料的微波性能，研究影响局域微波性能的因素，是高温超导微波器件应用研究中的一个重要方面．我们设计和制造了... 详细信息

高温超导薄膜的微波性能受制备工艺和衬底材料性能的影响，常常出现空间不均匀分布，因此，无损检测大面积超导薄膜及衬底材料的微波性能，研究影响局域微波性能的因素，是高温超导微波器件应用研究中的一个重要方面．我们设计和制造了一套同轴谐振腔型微波近场扫描显微镜，利用该显微镜研究了金属薄膜样品微波表面电阻和介质材料的介电常数的空间分布，给出了其空间分辨率并分析了影响空间分辨率的因素．利用这套微波近场扫描显微镜，对大面积ＬａＡｌＯ３单晶衬底材料介电常数的空间分布进行了测量，并分析了其测量精度．最后，利用这套微波近场扫描显微镜，研究了ＹＢａＣｕＯ薄膜平面微波器件的微波表面电阻的分布情况，对影响其局域微波性能的因素做了初步分析

关键词：显微镜高温超导制备工艺实验设备衬底材料谐振腔表面电阻表面比电阻介质材料针尖半径微波性能介电常数电容率介电性质薄膜样品无损检测无损探伤材料试验微波电磁波近场电磁场

STUDY ON HOT SAND COOlING EQUIPMENT WITH DAMPING SAND CASCADE AND VERTICAl SPOUTED-FlUIDIZED BED

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Acta Metallurgica Sinica(English letters) 2005年第5期18卷 669-673页

作者： l. C. Wang F. Wang x.H. you Department of Material Science and Engineering Taiyuan University of Science and Technology Taiyuan 030024 China

A new kind of hot sand cooling equipment with vertical spouted-fluidized bed is developed in this paper. It is similar to the traditional horizontal vibrating fluidized boiling cooler in principle but different from it in structure. The processing principle of the cooler is analyzed. The influence of main structural and processing parameters on the cooling effect and its mechanism are researched. Other characteristics of the cooler are discussed also. Experiment results show that the cooling efficiency η is equal to or larger than 83%, the temperature of output sand is less than 40℃ with the temperature of input sand is about between 80 and 90℃, and the productivity is 5t/ （h·m）

关键词： hot sand cooling fluidized bed foundry equipment

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高温超导内禀结在毫米波的谐波混频

低温物理学报 1999年第2期21卷 32-36页

作者：周赣东单文磊尤立星许伟伟杨森祖吉争鸣冯一军程其恒吴培亨南京大学电子科学与工程系

本文报道了Ｂｉ２Ｓｒ２ＣａＣｕ２Ｏ８＋ｘ内禀结在毫米波段的谐波混频，给出了谐波混频中直流偏置和本征功率与中频输出功率的关系曲线，并对实验结果作了初步讨论

关键词：谐波混频关系曲线波段中频输出功率直流偏置高温超导

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核磁共振YBCO表面探测线圈的设计与制备

低温物理学报 1999年第4期21卷 74-77页

作者：潘俊康琳吴培亨尤立星左景萍冯一军郭大元曹春海南京大学电子系超导实验室电子工业部五十五所

本文采用２０×２０ｍｍ的ＹＢＣＯ／ＬａＡｌＯ３薄膜，采用传统的光刻技术制备出了可用于探测核磁共振的超导线圈．并且在７７Ｋ的低温下测量的其ｆ０及Ｑ值．其ｆ０为３５２ＭＨｚ，Ｑ值为１５０．本文还介绍了器件的设计和分析考虑... 详细信息

本文采用２０×２０ｍｍ的ＹＢＣＯ／ＬａＡｌＯ３薄膜，采用传统的光刻技术制备出了可用于探测核磁共振的超导线圈．并且在７７Ｋ的低温下测量的其ｆ０及Ｑ值．其ｆ０为３５２ＭＨｚ，Ｑ值为１５０．本文还介绍了器件的设计和分析考虑、器件的加工工艺及实验结果讨论

关键词：核磁共振探测线圈超导线圈 YBCO

IRREDUCIBlE REPRESENTATIONS FOR THE AFFINE-VIRASORO lIE AlGEBRA OF TYPE B_l

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Chinese Annals of Mathematics,Series B 2004年第3期25卷 359-368页

作者： JIANG CUIBO you HONG Department of Mathematics Harbin Institute of Technology Harbin 150001 China Department of Mathematics Shanghai Jiaotong University Shanghai 200030 China Department of Mathematics Harbin Institute of Technology Harbin 150001 China

An explicit construction of irreducible representations for the affine-Virasoro lie algebra of type Bl, through the use of vertex operators and certain oscillator representations of the Virasoro algebra, is given.

关键词： Affine-Virasoro lie algebra Vertex operator Irreducible module

Inheritance of marsh spot disease resistance in cranberry common bean(Phaseolus vulgaris l.)

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The Crop Journal 2022年第2期10卷 456-467页

作者： Bosen Jia Robert l.Conner Nadeem Khan Anfu Hou xuhua xia Frank M.you Ottawa Research and Development Centre Agriculture and Agri-Food CanadaOttawaOntario K1A 0C6Canada Department of Biology University of OttawaOttawaOntario K1N 6N5Canada Morden Research and Development Centre Agriculture and Agri-Food CanadaMordenManitoba R6M 1Y5Canada

Common bean(Phaseolus vulgaris) is an annual legume crop that is grown worldwide for its edible dry seeds and tender pods. Marsh spot(MS) of the seeds is a physio-genic stress disease affecting seed quality in beans. Studies have suggested that this disease involves a nutritional disorder caused by manganese deficiency, but the inheritance of resistance to this disease has not been reported. A biparental genetic population composed of 138 recombinant inbred lines(RIls) was developed from a cross between an MS resistant cultivar ‘Cran09’ and an MS susceptible cultivar ‘Messina’. The 138 RIls and their two parents were evaluated for MS resistance during five consecutive years from 2015 to 2019 in sandy and heavy clay soils in Morden, Manitoba, Canada. The MS incidence(MSI) and the MS resistance index(MSRI) representing disease severity were shown to be both highly correlated heritable traits that had high broad-sense heritability values(H;) of 86.5% and 83.2%, respectively. No significant differences for MSI and MSRI were observed between the two soil types in all five-(MSI) or four-year(MSRI) data collection, but significant correlations among years were observed despite MS resistance was moderately affected by year. The MSIs and MSRIs displayed a right-skewed distribution, indicating a mixed genetic model involving a few major genes and polygenes. Using the joint segregation analysis method, the same four major genes with additive-epistasis effects showed the best fit for both traits, explaining 84.4% and85.3% of the phenotypic variance for MSI and MSRI, respectively. For both traits, the M1, M2, M3 and m4 acted as the favorable(resistant) alleles for the four genes where M and m represent two alleles of each gene. However, due to epistatic effects, only the individuals of the M1 M2 M3 M4 haplotype appeared to be highly resistant, whereas those of the m1 m2 m3 M4 haplotype were the most susceptible. The m4 allele significantly suppressed the additive effects of M1 M

关键词： Common bean Cranberry bean Marsh spot Resistance Recombinant inbred line(RIl) Joint segregation analysis Major gene Polygene

Self-assembly and pH-Responsive Properties of Poly(l-glutamic acid-r-lleucine) and Poly(l-glutamic acid-r-l-leucine)-b-Polysarcosine

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Chinese Journal of Polymer Science 2015年第8期33卷 1186-1195页

作者： Ce Tian 凌君 you-qing Shen MOE Key laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang University Department of Chemical and Biological Engineering Zhejiang University

Polypeptides and polypeptoids were widely used as biomedical materials because of their good biocompatibility. In this work we reported a series of pH-responsive copolypeptides and polypeptide-polypeptoid block copolymers, i.e. random copolymers of l-glutamic acid （Glu） with l-leucine （leu） [poly（Glu-r-leu）s], as well as their block copolymers with polysarcosine （polySar）. Well-defined poly（Glu-r-leu）s with predictable compositions and molecular weights were synthesized by ring opening polymerization of corresponding N-carboxyanhydride monomers. We investigated the relationship between hydrophilicity-hydrophobicity transition and copolymer composition. With increasing leu fraction, both the pH value of cloud point and the micellar size increased. Poly（Glu-r-leu） with 60% leu exhibited a cloud point at the pH of 5.0 to 6.0 the same as that in endosome and lysosome. Poly（Glu-r-leu）-b-polySars assembled in phosphate buffer and performed pH-responsive morphology change from orbicular micelles at high pH to worm-like micelles at low pH. They were potential pH-responsive carriers for drug and gene delivery to enhance cargo release in cellules.

关键词： α-Amino acid NCA Random/block copolypeptide pH-Responsive Hydrophilicity-hydrophobicity transition.

Control allocation for a class of morphing aircraft with integer constraints based on lévy flight

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Journal of Systems Engineering and Electronics 2020年第4期31卷 826-840页

作者： lU Yao SUN you lIU xiaodong GAO Bo Beijing Aerospace Automatic Control Institute Beijing 100854China National Key laboratory of Science and Technology on Aerospace Intelligence Control Beijing 100854China

Aiming at tracking control of a class of innovative control effector(ICE) aircraft with distributed arrays of actuators, this paper proposes a control allocation scheme based on the lévy *** from the conventional aircraft control allocation problem,the particular characteristic of actuators makes the actuator control command totally subject to integer constraints. In order to tackle this problem, first, the control allocation problem is described as an integer programming problem with two desired objectives. Then considering the requirement of real-time, a metaheuristic algorithm based on the lévy flight is introduced to tackling this problem. In order to improve the searching efficiency, several targeted and heuristic strategies including variable step length and inherited population initialization according to feedback and so on are designed. Moreover, to prevent the incertitude of the metaheuristic algorithm and ensure the flight stability, a guaranteed control strategy is designed. Finally, a time-varying simulation model is introduced to verifying the effectiveness of the proposed scheme. The contrastive simulation results indicate that the proposed scheme achieves superior tracking performance with appropriate actuator dynamics and computational time, and the improvements for efficiency are active and the parameter settings are reasonable.

关键词： flight control control allocation optimization lévy flight tracking control