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A low-frequency and broadband wave-insulating vibration isolator based on plate-shaped metastructures

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Applied Mathematics and Mechanics(English Edition) 2024年第7期45卷 1171-1188页

作者： Wei WEI Feng GUAN xin fang College of Intelligent Science National University of Defense TechnologyChangsha410073China Naval Research Academy Beijing100161China

A metamaterial vibration isolator,termed as wave-insulating isolator,is proposed,which preserves enough load-bearing capability and offers ultra-low and broad bandgaps for greatly enhanced wave *** consists of plate-shaped metacells,whose symmetric and antisymmetric local resonant modes offer several low and broad mode bandgaps although the complete bandgap remains high and *** bandgap mechanisms,vibration isolation properties,effects of key parameters,and robustness to complex conditions are *** experimentally demonstrated,the wave-insulating isolator can improve the vibration insulation in the ranges of[50 Hz,180 Hz]and[260 Hz,400 Hz]by 15 dB and 25 dB,respectively,in contrast to the conventional isolator with the same first resonant frequency.

关键词： metamaterial and metastructure vibration isolation bandgap wave insulation plate

Regulation and integration of plant jasmonate signaling:a comparative view of monocot and dicot

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Journal of Genetics and Genomics 2022年第8期49卷 704-714页

作者： Shiwei Wan Xiu-fang xin National Key Laboratory of Plant Molecular Genetics CAS Center for Excellence in Molecular Plant SciencesInstitute of Plant Physiology and EcologyChinese Academy of SciencesShanghai 200032China University of Chinese Academy of Sciences Beijing 100049China CAS-JIC Center of Excellence for Plant and Microbial Sciences(CEPAMS) Institute of Plant Physiology and EcologyChinese Academy of SciencesShanghai 200032China

The phytohormone jasmonate plays a pivotal role in various aspects of plant life,including developmental programs and defense against pests and pathogens.A large body of knowledge on jasmonate biosynthesis,signal transduction as well as its functions in diverse plant processes has been gained in the past two *** addition,there exists extensive crosstalk between jasmonate pathway and other phytohormone pathways,such as salicylic acid(SA)and gibberellin(GA),in co-regulation of plant immune status,fine-tuning the balance of plant growth and defense,and so on,which were mostly learned from studies in the dicotyledonous model plants Arabidopsis thaliana and tomato but much less in ***,existing evidence suggests both conservation and functional divergence in terms of core components of jasmonate pathway,its biological functions and signal integration with other phytohormones,between monocot and *** this review,we summarize the current understanding on JA signal initiation,perception and regulation,and highlight the distinctive characteristics in different lineages of plants.

关键词： Jasmonate Phytohormone Signaling Crosstalk Plant defense Development Stress response

Phyllosphere microbiota:Community dynamics and its interaction with plant hosts

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Journal of Integrative Plant Biology 2021年第2期63卷 297-304页

作者： Tianyu Gong Xiu-fang xin National Key Laboratory of Plant Molecular Genetics CAS Center for Excellence in Molecular Plant SciencesInstitute of Plant Physiology and EcologyChinese Academy of SciencesShanghai 200032China University of the Chinese Academy of Sciences Beijing 100049China The Chinese Academy of Sciences(CAS)and CAS John Innes Centre of Excellence for Plant and Microbial Sciences Shanghai 200032China

Plants are colonized by various microorganisms in natural *** many studies have demonstrated key roles of the rhizosphere microbiota in regulating biological processes such as nutrient acquisition and resistance against abiotic and biotic challenges,less is known about the role of the phyllosphere microbiota and how it is established and *** review provides an update on current understanding of phyllosphere community assembly and the mechanisms by which plants and microbes establish the phyllosphere microbiota for plant health.

关键词： community assembly dysbiosis phyllosphere microbiota plant immunity plant–microbe interaction

Semiparametric Likelihood-based Inference for Censored Data with Auxiliary Information from External Massive Data Sources

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Acta Mathematicae Applicatae Sinica 2020年第3期36卷 642-656页

作者： Yue-xin fang Yong ZHOU School of Statistics and Management Shanghai University of Finance and EconomicsShanghai200433China Key Laboratory of Advanced Theory and Application in Statistics and Data Science MOEand Academy of Statistics and Interdisciplinary SciencesEast China Normal UniversityShanghai 200062China

Published auxiliary information can be helpful in conducting statistical inference in a new *** this paper,we synthesize the auxiliary information with semiparametric likelihood-based inference for censoring data with the total sample size is *** express the auxiliary information as constraints on the regression coefficients and the covariate distribution,then use empirical likelihood method for general estimating equations to improve the efficiency of the interested parameters in the specified *** consistency and asymptotic normality of the resulting regression parameter estimators *** numerical simulation and application with different supposed conditions show that the proposed method yields a substantial gain in efficiency of the interested parameters.

关键词： Auxiliary information Massive data Censored data Empirical likelihood Estimation equations

Study on pressure wave propagation in two-phase flow in liquid oxygen feed pipe between pumps

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航空动力学报 2010年第10期25卷 2352-2357页

作者： WEI xin SUN Bing fang Jie School of Astronautics Beijing University of Aeronautics and Astronautics Beijing 100191 China

A study on the character of pressure wave propagation was proposed for the gas liquid oxygen two-phase flow in the pipe between *** to the practical working conditions,the homogenous model based on the compressibility theory regarding a single bubble in an infinite liquid,and Redlich-Kwong gas equation was derived a model for the low temperature and high pressure case,especially considering the change of the ratio of density of gas to one of *** numerical tests were *** results not only show the agreement between numerical simulation for this model and experiment at the normal temperature and pressure is good,but also show that the modifications of the model for the low temperature and high pressure condition are *** study is of reference to further study of oscillation restrain and relative pipe tests.

关键词： two-phase flow pressure wave pipe between pumps phase velocity attenuation

DC performance and AC loss of cable-in-conduit conductors for International Thermonuclear Experimental Reactor

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Nuclear Science and Techniques 2016年第3期27卷 176-185页

作者： Wei Zhou xin-Yu fang Jin fang Bo Liu School of Electrical Engineering Beijing Jiaotong UniversityBeijing 100044China Department of Electrical and Computer Engineering University of VictoriaVictoriaBC V8W2Y2Canada Institute of Plasma Physics Chinese Academy of SciencesHefei 230031China

A reliable prediction of AC loss is essential for the application of International Thermonuclear Experimental Reactor(ITER) cable-in-conduit conductors(CICCs);however,the calculation of AC loss of ITER CICCs is a cumbersome task due to the complicated geometry of the multistage cables and the extreme operating conditions in *** this paper,we described the models developed for hysteresis and coupling loss calculation,which can be suitable for the construction of ITER magnetic ***,we compared the results of theoretical analysis with the SULTAN test result to evaluate the numerical model we *** addition,we introduced the n-value and AC loss with transport current for CICCs based on the DC measurement results at SULTAN,which lays the foundation for the further study.

关键词：国际热核聚变实验堆交流损耗电缆导体电缆导管直流测量 ITER计划国际热核实验反应堆性能

Detection of CO Outflow in Rotating Cores

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Chinese Journal of Astronomy and Astrophysics 2008年第2期8卷 230-236页

作者： xin Guan Yue-fang Wu Department of Astronomy Peking University Beijing 100871

We investigate the effect of bulk motion on the detection of molecular outflows in the sources S146, GGD27, and IRAS 22566＋5830. The traditional techniques do allow for bulk motions or systematic VLSR shifts of the core emissions, which may cause contamination of the high velocity gas emissions, and outflows may either fail to be detected or have their properties miscalculated. We used a program to follow the systematic shift of VLSR and better results have been obtained.

关键词： ISM: jets and outflows -- ISM: kinematics and dynamics -- ISM: molecules-- stars: formation

Amorpha-4,11-diene synthase: a key enzyme in artemisinin biosynthesis and engineering

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aBIOTECH 2021年第3期2卷 276-288页

作者： Jin Quan Huang xin fang National Key Laboratory of Plant Molecular Genetics Institute of Plant Physiology and Ecology/CAS Center for Excellence in Molecular Plant SciencesChinese Academy of SciencesShanghai 200032People's Republic of China State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of BotanyChinese Academy of SciencesKunming 650204YunnanPeople's Republic of China

Amorpha-4,11-diene synthase(ADS)catalyzes the first committed step in the artemisinin biosynthetic pathway,which is the first catalytic reaction enzymatically and genetically characterized in artemisinin *** advent of ADS in Artemisia annua is considered crucial for the emergence of the specialized artemisinin biosynthetic pathway in the *** production of amorpha-4,11-diene is a breakthrough in metabolic engineering and synthetic ***,numerous new techniques have been used in ADS engineering;for example,assessing the substrate promiscuity of ADS to chemoenzymatically produce *** this review,we discuss the discovery and catalytic mechanism of ADS,its application in metabolic engineering and synthetic biology,as well as the role of sesquiterpene synthases in the evolutionary origin of artemisinin.

关键词： Amorpha-4,11-diene Synthase Artemisinin Catalytic mechanism Metabolic engineering Synthetic biology

Intracellular RNA Labeling Technologies for the Analysis of RNA Biology

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Chinese Journal of Chemistry 2024年第7期42卷 790-801页

作者： Ruiqi Zhao xin fang Xiaocheng Weng Department of Clinical Laboratory Center for Gene DiagnosisDepartment of NeurosurgeryZhongnan Hospital of Wuhan UniversityWuhanHubei 430071China College of Chemistryand Molecular Sciences Key Laboratory of Biomedical Polymers-Ministry of EducationWuhan UniversityWuhan Hubei 430072China

As a cornerstone of the central dogma of molecular biology,RNA plays vital roles in living *** the past few decades,many RNA labeling technologies have been developed to elucidate the biological function of *** technologies have signifi-cantly advanced our understanding of RNA secondary structure,localization,and ***,taking advantage of these innovative RNA labeling approaches,plenty of tool kits have been devised for the regulation of RNA-related biological process,such as gene expression and gene *** this review,we primarily focus on an array of intracellular RNA labeling methods,encom-passing chemical probes-based labeling,metabolic labeling,and proximity-dependent *** also provide a brief overview of their applications in the research of RNA ***,the perspectives of RNA labeling are also discussed.

关键词： RNA Chemical probes Metabolic labeling Proximity-dependent labeling RNA structures Gene sequencing RNA recognition