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Journal of Rare Earths 2018年第4期36卷 404-408页

作者： Jiamao Li Peng Xu Tai qiu Lichun Yao School of Materials Science and Engineering Anhui University of Technology Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites Nanjing Tech University College of Materials Science and Engineering Nanjing Tech University

0.5 Ca（0.6La0.267TiO3-0.5 Ca（Mg1/3Nb2/3）O3（5 CLT-5 CMN） ceramics were prepared by a reaction-sintering process and their sintering characteristics, microwave dielectric properties were investigated in *** any calcination stage involved,a mixture of CaCO_3, La_2 O_3, TiO_2, MgO and Nb_2 O_5 was pressed and sintered directly. Pure phase 5 CLT-5 CMN ceramics with high density and dense microstructure can be obtained after sintered at 1400 ℃ for 4 h. Compared with those prepared by the conventional ceramic route, 5 CLT-5 CMN ceramics produced by the reaction-sintering process exhibit slightly higher dielectric constant and q×f value. Fine microwave dielectric properties of ε_r= 56.4, q×f= 48,550 GHz and T_f = ＋8.7 ppm/℃ for 5 CLT-5 CMN ceramics sintered at 1400 ℃ for 4 h are obtained, suggesting reactionsintering process is a simple and efficient method to produce pure phase 5 CLT-5 CMN ceramics as a potential candidate for the fabrication of microwave devices.

关键词： Microwave ceramics Sintering behavior Dielectric properties Reaction sintering Rare earths

Reaction of o-Carboryne with Furans： Facile Synthesis of Carborane- Fused Oxanorbornenes and Their Derivatives

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Chinese Journal of Chemistry 2018年第4期36卷 273-279页

作者： RongyiZhang Yinggen Yuan Zaozao qiu Zuowei Xie Shanshai-Hong Kong Joint Laboratory in Chemical Synthesis Shanghai Institute of Organic Chemistry Chinese Academy of Sciences 345 Lingling Road Shanshai 200032 China Department of Chemistry The Chinese University of Hong Kong Shatin New Territories Hong Kong China

o-Carboryne （1,2-dehydro-o-carborane） is a very useful synthon for the synthesis of a variety of carborane-functionalized molecules. Diels-Alder reaction of o-carboryne with furans gave a series of carborane-fused oxanorbornenes in moderate to high yields using 1-OTf-1,2-C_2B_10H_11 as carboryne precursor. The resultant cycloadducts can undergo hydrogenation, cyclic oxidation, bromination, [4＋2]/[2＋2] cycloaddition and nucleophilic ring opening reaction to afford a variety of highly functionalized carboranes that may find applications as useful basic units in medicine and materials science.

关键词： carborane carboryne [4+2] cycloaddition furan ring opening reaction

Drift Mode Growth Rate and Associated Ion Thermal Transport in Reversed Magnetic Shear Tokamak Plasma

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Chinese Physics Letters 2001年第5期18卷 650-652页

作者： wANG Ai-Ke qiu Xiao-Ming Southwestern Institute of Physics P.O.Box 432Chengdu 610041

Drift mode linear growth rate and quasi-linear ion thermal transport in the reversed magnetic shear plasma are investigated by using the two-fluid theory,previously developed by weiland and the Chalmers group[***,29(1989)1810;ibid.30(1990)983].The theory is here extended to including both the radial electrical field shear(d E_(r)/dr)and the electron fluid velocity(V_(e))in the sheared coordinate ***,Ve describes the coupling between the safety factor q and the E_(r) × B velocity *** influences on the growth rate and associated ion thermal transport are obtained numerically,In addition,the ion heat pinch in the reversed shear plasma is ***,the present conclusions are in good agreement with the experimental results.

关键词： reversed Shear theory

Tachycardia pacing induces myocardial neovascularization and mobilizes circulating endothelial progenitor cells partly via SDF-1 pathway in canines

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Tachycardia pacing induces myocardial neovascularization and...

Higher Order Fractional Differentiability for the Stationary Stokes System

中国生理学会基质生物学专业委员会成立大会暨第一次全国基质生物学学术会议

作者： Mai J wang F qiu q Tang B Lin Y Luo N Yuan w wang X Chen q wang J Chen Y Department of Cardiology Sun Yat-sen Memorial Hospital of Sun Yat-sen University Guangdong Province Key Laboratory of Arrhythmia and Electrophysiology Department of Anesthesiology Sun Yat-sen Memorial Hospital of Sun Yat-sen University Intelligent Computing Research Center Harbin Institute of Technology Shenzhen Graduate School

Neovascularization plays pivotal role in ischemic heart failure;however,it is unclear in nonischemic heart ***-ischemic heart failure was induced by chronic rapid right ventricular pacing at 200 beats/min,respectively,for 3 and 6 weeks in 12 ***-operation was performed in another 6 dogs as ***-week tachycardia pacing could induce mild/moderate heart

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Acta Mathematica Sinica,English Series 2023年第1期39卷 13-29页

作者： Ling wei MA Zhen qiu ZHANG qi XIONG School of Mathematical Sciences Tianjin Normal UniversityTianjin 300387P.R.China School of Mathematical Sciences and LPMC Nankai UniversityTianjin 300071P.R.China School of Mathematical Sciences Nankai UniversityTianjin 300071P.R.China

This paper focuses on the higher order fractional differentiability of weak solution pairs to the following nonlinear stationary Stokes system{div A(x-Du)-■π=divF,inΩdivu=0,inΩ.In terms of the difference quotient method,our first result reveals that if F∈B_(p,***)^(β)(Ω,R^(n))for p=2 and 1≤q≤2n/n-2β,then such extra Besov regularity can transfer to the symmetric gradient Du and its pressureπwith no losses under a suitable fractional differentiability assumption on x■A(x,ξ).Furthermore,when the vector field A(x,Du)is simplified to the full gradient■u,we improve the aforementioned Besov regularity for all integrability exponents p and q by establishing a new Campanato-type decay estimates for(■u,π).

关键词： Higher order fractional differentiability Stokes system Besov spaces

The reservoir learning power across quantum many-body localization transition

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Frontiers of physics 2022年第3期17卷 91-99页

作者： wei Xia Jie Zou Xingze qiu Xiaopeng Li State Key Laboratory of Surface Physics Institute of Nanoelectronics and Quantum Computingand Department of PhysicsFudan UniversityShanghai 200433China Shenzhen Institute for quantum Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Shanghai qi Zhi Institute AI TowerXuhui DistrictShanghai 200232China

Harnessing the quantum computation power of the present noisy-intermediate-size-quantum devices has received tremendous interest in the last few years. Here we study the learning power of a one-dimensional long-range randomly-coupled quantum spin chain, within the framework of reservoir computing. In time sequence learning tasks, we find the system in the quantum many-body localized (MBL) phase holds long-term memory, which can be attributed to the emergent local integrals of motion. On the other hand, MBL phase does not provide sufficient nonlinearity in learning highly-nonlinear time sequences, which we show in a parity check task. This is reversed in the quantum ergodic phase, which provides sufficient nonlinearity but compromises memory capacity. In a complex learning task of Mackey–Glass prediction that requires both sufficient memory capacity and nonlinearity, we find optimal learning performance near the MBL-to-ergodic transition. This leads to a guiding principle of quantum reservoir engineering at the edge of quantum ergodicity reaching optimal learning power for generic complex reservoir learning tasks. Our theoretical finding can be tested with near-term NISq quantum devices.

关键词： quantum reservoir computing many-body localization quantum ergodic edge of quantum ergodicity optimal learning power

Integral formulas for differential forms of type (p,q) on complex Finsler manifolds

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Science China Mathematics 2004年第2期47卷 284-296页

作者： qiu Chunhui ZHONG Tongde Department of Mathematics Xiamen University Xiamen 361005 China Department of Mathematics Xiamen University Xiamen 361005 China

Using the invariant integral kernel introduced by Demailly and Laurent-Thiebaut, complex Finsler metric and nonlinear connection associating with Chern-Finsler connection, we research the integral representation theory on complex Finsler manifolds. The Koppelman and Koppelman-Leray formulas are obtained, and the $\overline \partial $-equations are solved.

关键词： complex Finsler manifold Chern-Finsler connection invariant integral kernel Koppelman-Leray formula $$\overline \partial $$ -equation

Hierarchically Multifunctional Polyimide Composite Films with Strongly Enhanced Thermal Conductivity

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Nano-Micro Letters 2022年第2期14卷 94-106页

作者： Yongqiang Guo Hua qiu Kunpeng Ruan Yali Zhang Junwei Gu Shaanxi Key Laboratory of Macromolecular Science and Technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an 710072ShaanxiPeople’s Republic of China

The development of lightweight and integration for electronics requires flexible films with high thermal conductivity and electromagnetic interference(EMI) shielding to overcome heat accumulation and electromagnetic radiation ***,the hierarchical design and assembly strategy was adopted to fabricate hierarchically multifunctional polyimide composite films,with graphene oxide/expanded graphite(GO/EG) as the top thermally conductive and EMI shielding layer,Fe_(3)O_(4)/polyimide(Fe_(3)O_(4)/PI) as the middle EMI shielding enhancement layer and electrospun PI fibers as the substrate layer for mechanical *** composite films with 61.0 wt% of GO/EG and 23.8 wt% of Fe_(3)O_(4)/PI exhibits high in-plane thermal conductivity coefficient(95.40 w(m K)^(-1)),excellent EMI shielding effectiveness(34.0 dB),good tensile strength(93.6 MPa) and fast electric-heating response(5 s).The test in the central processing unit verifies PI composite films present broad application prospects in electronics fields.

关键词： EMI shielding Flexible films Polyimide Thermal conductivity

Alleviatory effect of rare earth micro-fertilizer on photosystemⅡ(PSⅡ)photoinhibition in Pseudostellaria heterophylla leaves at photosynthetic midday depression

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Journal of Rare Earths 2022年第7期40卷 1156-1164页

作者： Yingli Ma Tao wang Yinfeng Xie qian Lv Lingling qiu Co-Innovation Center for Sustainable Forestry in Southern China College of Biology and the EnvironmentNanjing Forestry UniversityNanjing 210037China Jiangsu Key Laboratory for the Research and Utilization of Plant Resources Institute of BotanyJiangsu Province and Chinese Academy of Sciences(Nanjing Botanical Garden Mem.Sun Yat-Sen)Nanjing 210014China

In order to explo re the mitigatory mechanism of rare earths on the midday depression of photosynthesis,this study used fast-phase chlorophyll fluorescence technology combined with an antioxidant enzyme system to analyze the effects of lanthanum and cerium on the photosystemⅡ(PSⅡ)function of Pseudostellaria heterophylla leaves at *** results show that the maximum photochemical efficiency(F_(v)/F_(m))and the photosynthetic performance index(PI_(ABS))of *** leaves during the photo synthetic noon-break are only 0.73 and 0.86,*** leaves of *** show obvious *** application of two rare earth fertilizers promotes the light energy absorption,capture,conversion,and electron transfer efficiencies of PSⅡin the *** leaves and alleviates the photoinhibition caused by excess excitation ***,the effect of lanthanum is better than that of *** the fertilization groups,*** leaves show higher PSⅡphotochemical *** protects the oxygen-evolving complex(OEC)activity of ***,thus reducing oxidative damage to the chloroplasts and preventing the dissociation of the thylakoids to maintain the normal physiological functioning of PSⅡ,thereby reducing the degree of ***,fertilization increases the electron transfer ability from q_(A) to q_(B) on the PSⅡelectron receptor side of *** analysis shows that the fluorescence parameters V_(L),V_(K),and V_(J) are significantly negatively correlated with antioxidant enzyme activity and are significantly positively correlated with malondialdehyde content,relative electric conductivity and reactive oxygen species(ROS),which further indicates that rare earths can enhance the ROS scavenging system in plants and reduce the degree of membrane lipid peroxidation and plasma membrane damage,thereby maintaining the structure and function of the OEC on the donor side of PSⅡ,increasing the elect

关键词： Pseudostellaria heterophylla Rare earths Photoinhibition JIP-test Antioxidant enzyme system

利用猕猴桃雌雄同株材料发掘性别决定相关基因

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植物遗传资源学报 2024年第7期25卷 1153-1162页

作者：吴淋慧董家琦郑浩邱栋梁张琼钟彩虹福建农林大学园艺学院福州350002 中国科学院武汉植物园/中国科学院植物种质创新与特色农业重点实验室/中国科学院猕猴桃产业技术工程实验室武汉430074 中国科学院大学现代农业科学学院北京100049

为探究猕猴桃雌雄异株变异为雌雄同株的分子机制,本研究对满天红猕猴桃雌雄同株变异株的雌花与雄花进行了转录组测序、生物信息学分析及q RT-PCR验证。转录组差异表达基因鉴定结果表明,雌花和雄花间共有337个差异表达基因,雄花中有241... 详细信息

为探究猕猴桃雌雄异株变异为雌雄同株的分子机制,本研究对满天红猕猴桃雌雄同株变异株的雌花与雄花进行了转录组测序、生物信息学分析及q RT-PCR验证。转录组差异表达基因鉴定结果表明,雌花和雄花间共有337个差异表达基因,雄花中有241个基因表达量上调,有96个基因表达量下调。差异表达基因的GO与KEGG富集结果表明,与雌花相比,雄花中上调的基因主要参与氨基糖和核苷酸糖的代谢以及次生代谢物合成等路径;下调的基因则主要富集在次生代谢物合成、类胡萝卜素合成等途径。通过功能注释分析出30个潜在的性别相关调控基因,其中5个在次生代谢产物合成路径中表达。选取7个差异表达基因进行q RT-PCR验证,其在雌花、雄花中的表达水平与转录组数据一致。本研究结果为猕猴桃雌雄同株材料的创制提供了一定的理论依据。

关键词：满天红猕猴桃性别基因雌雄同株转录组分析基因表达

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