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AXIAL SUPERRESOLUTION BY PHASE FILTER IN OPTICAL COHERENCE TOMOGRAPHY

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Journal of Innovative Optical Health Sciences 2012年第4期5卷 1-7页

作者： ZHIHUA DING yang ni JIE MENG State Key Laboratory of Modern Optical Instrumentation Zhejiang University Hangzhou 310027P.R.China

Axial superresolution in optical coherence tomography(OCT)by a three-zone annular phase¯lter is *** the proposed probe of a spectral domain OCT system,the width of the central lobe of the axial intensity point spread function is apodized by the¯lter to be within the coherence gate determined by the light source,while its sidelobes are lying outside the coherence gate without contributing to the coherence *** measurement of the depth response of the OCT system before and after inserting the¯lter,an improvement of about 20%in axial resolution is *** imaging on biological sample of orange fresh is also conducted,demonstrating increased depth discrimination without the negative contribution from sidelobes realized by the phaselter in combination with the coherence gate intrinsic to *** comes to a conclusion that we can obtain axial superresolution by¯lter in OCT system without the degrading in°uence of large sidelobes.

关键词： system orange outside

Molecular Cloning and Bacterial Expression of Germacrene A Synthase cDNA from Crepidiastrum sonchifolium

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Chemical Research in Chinese Universities 2006年第5期22卷 606-611页

作者： REN Jie LIU Yan-qiu yang Li ni Rui YOU Song School of Pharmaceutical Engineering Shenyang Pharmaceutical UniversityShenyang 110016 P. R. China

Germacrene A synthase（GAS） catalyzes the biosynthesis of germacrene A, which is a key precursor for sesquiterpone lactones. Cloning of a novel full-length cDNA encoding GAS from the medicinal plant Crepidiastrum sonchifolium（dosignated CsGAS） is reported in this study. The cDNA is 1837 bp long and contains a 1680-bp open reading frame encoding a 559 amino-acid protein. The functional expression of the cDNA in Escherichia coli, as an N-terminal thioredoxin fusion protein, with the pET32a vector yielding a recombinant enzyme. Sequence analysis was used to compare this enzyme with the mechanistically related epi-aristolochene synthase from tobacco, and the effect of possible involvement of a number of amino acids in sesquiterpone synthase on product specificity was also discussed.

关键词： Germacrene A synthase Crepidiastrum sonchifolium Sesquiterpene synthase Expression Fusion protein

Ternary PtSmCo NPs electrocatalysts with enhanced oxygen reduction reaction

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Journal of Rare Earths 2020年第12期38卷 1305-1311页

作者： Qinghua Gong Leping Wang ni yang Lin Tian Gang Xie Bing Li School of Mechanical and Power Engineering East China University of Science and Technology.Shanghai 200237China Kunming Metallurgical Research Institute Kunming 650031China State Key Laboratory of Pressure Hydrometallurgical Technology of Associated Nonferrous Metal Resources Kunming 650031China

PtSmCo ternary metal nanoparticles(NPs)were synthesized as electrocatalysts for oxygen reduction reaction(ORR).Firstly,SmCo NPs were prepared by potentiostatic electrodeposition in ionic liquids(ILs),and the average particle diameter of SmCo NPs corresponds to about 238 nm(-0.65 V),72 nm(-0.75 V)and 45 nm(-0.85 V),***,displacement and reductions of SmCo NPs occur in the K2 PtCl4 and L-ascorbic acid sodium with about 3 nm of Pt NPs which grow on the surface of SmCo NPs to form PtSmCo ternary metal *** of cycle voltammetry(CV)and line sweep voltammetry(LSV)indicate that the electrocatalytic property for ORR generates a decreasing order of commercial Pt/C>PtSmCo0.85>PtSmCo0.75>*** durability testing(ADT)after 10000 cycles shows that PtSmCo0.85 NPs electrocatalyst decreases by-40%in electrochemical active surface areas(ECSA),the half-wave potential(E1/2)only negatively shifts by 14 mV and decreases by^13.6%in mass activity(MA).When compared with JM Pt/C,where it decreases by^49%in ECSA,E1/2 is negatively shifted by 40 mV and decreased by^50%in ***,PtSmCo0.85 NPs electrocatalyst is more stable than JM Pt/C.

关键词： Rare earth metal Electrodeposition Ionic liquid Electrocatalyst Stability

Synthesis of three-dimensionally ordered porous perovskite type LaMnO_3 for Al-air battery

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Journal of Materials Science & Technology 2018年第9期34卷 1532-1537页

作者： Fuwei Xiang Xiuhua Chen Jie Yu Wenhui Ma Yuping Li ni yang School of materials science and engineering Yunnan University Kunming 650091 China National Engineering Laboratory of Vacuum Metallurgy Kunming University of Science and Technology Kunming 650093 China Kunming Metallurgical Research Institute Yunnan Province Kunming 650031 China

LaMnO3 catalysts with three-dimensionally ordered holes perovskite structure were prepared via closepacked SiO2 template synthesized by Stober-Frink method. SEM, XRD and BET were employed to characterize the microstructure, phases and specific surface area. CV method was used to the oxygen electrode beha-vior of catalysts. Diameter of the holes was about 330 nm, corresponding to the size of SiO2 template. Full-cell discharge tests were performed on aluminum-air battery fabricated by porous *** showed that the discharge performance of porous LaMnO3 were 1.54 V, 1.42 V and 1.24 V respectively when the discharge currents were set at 5 mA/cm^2,10 mA/cm^2 and 20 mA/cm^2, respectively, which were higher than that of LaMnO3 prepared by coprecipitation method（1.33 V, 1.09 V, 0.63 V, respectively）.

关键词： SiO2 template Pervoskite Porous LaMnO3 Al-air battery

Mechanism of low thermal conductivity of xonotlite-silica aerogel nanoporous super insulation material

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Journal of University of Science and Technology Beijing 2008年第5期15卷 649-653页

作者： Hailong yang Wen ni Deping Chen Guoqiang Xu Tao Liang Li Xu Civil and Environmental Engineering School University of Science and Technology Beijing Beijing 100083 China

In an effort to incorporate the low thermal conductivity of the silica aerogel and the superior structure strength of the xonotlite,a composite material of these two was produced. It was synthesized under vacuum condition and dried by supercritical drying technique. The thermal conductivity of the new material,which is at 298K with the gas pressure ranging from 1.01×10^5 to 1×10^-2 Pa,was measured using the transient hot-strip method. The mechanism of the low thermal conductivity was studied. The results indicate that the low thermal conductivity mainly results from the significant decrease of gaseous thermal conductivity of the new material due to the restriction of the motion of gas molecules in its fine structures. The formation of the fine structures is because the new material takes the pore structure of the silica aerogel which consists of mainly nanometer-sized pores.

关键词： silica aerogel xonotlite nanometer-sized pore super insulation thermal conductivity

Empirical Analysis of Agricultural Cultural Resources Value Evaluation under DEA Model

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Computers, Materials & Continua 2020年第11期65卷 1411-1424页

作者： Wei Liang yang ni Tingyi Li Xuejiao Lin Soo-Jin Chung Division of Business Administration Wonkwang UniversityIksan-si54538Korea Shandong Agriculture and Engineering University Jinan250100China Weinan Normal University Weinan714099China

Agricultural culture is a productive activity about education and *** aims at high efficiency and high quality,uses technology as its means,and takes nature as its *** cultural resources are the product of the rapid development of modern *** promotes the development of the national economy and profoundly affects people's production and *** model,also known as data envelope analysis method,is an algorithm that uses multiple data decision units for input and output training to obtain the final *** article explains the concept and basic characteristics of agricultural *** questionnaire surveys and expert interviews,we collected development data,screened human,material,and financial data,and calculated information on economic and social *** this basis,this paper establishes the evaluation index of agricultural culture based on DEA ***,through empirical analysis from a specific perspective,it can be concluded that increasing human,material and financial input can achieve economic and social *** speaking,cultural investment can promote the development of the *** research results of this paper laid a theoretical foundation for the development of agricultural culture,and put forward a development model focusing on technology development,improving investment efficiency,and investing in material resources.

关键词： Agricultural culture DEA model empirical analysis development model

FOXG1 Directly Suppresses Wnt5a During the Development of the Hippocampus

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Neuroscience Bulletin 2021年第3期37卷 298-310页

作者： yang ni Bin Liu Xiaojing Wu Junhua Liu Ru Ba Chunjie Zhao Key Laboratory of Developmental Genes and Human Diseases Ministry of EducationSchool of MedicineSoutheast UniversityNanjing 210009China

The Wnt signaling pathway plays key roles in various developmental ***5a,which activates the non-canonical pathway,has been shown to be particularly important for axon guidance and outgrowth as well as dendrite ***,the mechanism underlying the regulation of Wnt5a remains ***,through conditional disruption of Foxg1 in hippocampal progenitors and postmitotic neurons achieved by crossing Foxg1~(fl/fl)with Emx1-Cre and Nex-Cre,respectively,we found that Wnt5a rather than Wnt3a/Wnt2b was markedly *** of Foxg1 had the opposite effects along with decreased dendritic complexity and reduced mossy fibers in the *** further demonstrated that FOXG1 directly repressed Wnt5a by binding to its promoter and one enhancer *** results expand our knowledge of the interaction between Foxg1 and Wnt signaling and help elucidate the mechanisms underlying hippocampal development.

关键词： Wnt5a Foxg1 hippocampus granule cell pyramidal neuron dendritic arborization mossy fiber Wnt

The Status Quo of Non-english Learners’ Icc&Cultivating Icc through Culture Teaching

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The Status Quo of Non-english Learners’ Icc&Cultivating Icc...

作者： yang ni-hua 西安外国语大学

学位级别：硕士

在全球化和文化多元化的时代背景下通过文化教学培养学生跨文化交际能力显得极为紧迫。然而有关交际文化教学的研究却极为罕见，因此，本文旨在调查非英语专业学生跨文化交际能力的现状并通过交际文化教学培养他们的跨文化交际能力。作... 详细信息

在全球化和文化多元化的时代背景下通过文化教学培养学生跨文化交际能力显得极为紧迫。然而有关交际文化教学的研究却极为罕见，因此，本文旨在调查非英语专业学生跨文化交际能力的现状并通过交际文化教学培养他们的跨文化交际能力。作者运用了定量研究和定性分析。本文受试者是西安邮电大学大二非英语专业的部分学生，作者通过调查问卷研究了非英语专业学生跨文化交际能力现状，并通过社会文化测试和访谈分析了他们的文化知识和文化学习。结果显示非英语专业学生的跨文化交际能力仍然低下，文化教学中缺乏交际文化。本论文研究指出了交际文化的内容，为提升学生跨文化交际能力做出了一定贡献。

关键词：全球化文化教学跨文化交际能力交际文化

Recent progress in Li and Mn rich layered oxide cathodes for Li-ion batteries

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Journal of Energy Chemistry 2021年第10期30卷 368-385,I0011页

作者： Yiwei Li Zhibo Li Cong Chen Kai yang Bo Cao Shenyang Xu ni yang Wenguang Zhao Haibiao Chen Mingjian Zhang Feng Pan School of Advanced Materials Peking UniversityShenzhen Graduate SchoolShenzhen 518055GuangdongChina Center for Advanced Radiation Source(ChemMatCARS) the University of ChicagoArgonneIL 60439United States

Li and Mn rich(LMR)layered oxides,written as xLi_(2) MnO_(3)·(1-x)LiMO_(2)(M=Mn,ni,Co,Fe,etc.),have been widely reported in recent years due to their high capacity and high energy *** stable structure and superior performance of LMR oxides make them one of the most promising candidates for the next-generation cathode ***,the commercialization of these materials is hindered by several drawbacks,such as low initial Coulombic efficiency,the degradation of voltage and capacity during cycling,and poor rate *** review summarizes research progress in solving these concerns of LMR cathodes over the past decade by following three classes of strategies:morphology design,bulk design,and surface *** elaborate on the processing procedures,electrochemical performance,mechanisms,and limitations of each approach,and finally put forward the concerns left and the possible solutions for the commercialization of LMR cathodes.

关键词： Li-ion batteries Li and Mn rich layered oxide cathodes Electrochemical concerns Progress and perspective