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Density dependence and habitat preference shape seedling survival in a subtropical forest in central China

Journal of Plant Ecology 2015年第6期8卷 568-577页

作者： junmeng lu Daniel J.Johnson Xiujuan Qiao Zhijun lu Qinggang Wang Mingxi Jiang Key Laboratory of Aquatic Botany and Watershed Ecology Wuhan Botanical GardenChinese Academy of Sciences1 Moshan RoadWuhanHubei 430074China Department of Life Science University of Chinese Academy of Sciences19A YuQuan RoadBeijing 100049China School of Forestry and Environmental Studies Yale University195 Prospect StreetNew HavenCT 06511USA

Aims seedlings are vulnerable to many kinds of fatal abiotic and biotic agents,and examining the causes of seedling dynamics can help understand mechanisms of species *** disentangle the relative importance of neighborhood densities,habitat factors and phylogenetic relatedness on focal seedling survival,we monitored the survival of 5306 seedlings of 104 species>15 *** address the following questions:(i)How do neighborhood densities,habitat variables and phylogenetic relatedness affect seedling survival?What is the relative importance of conspecific densities,habitat variables and phylogenetic relatedness to seedling survival?(ii)Does the importance of the neighborhood densities,habitat variables and phylogenetic relatedness vary among growth forms,leaf habits or dispersal modes?specially,does the conspecific negative density dependence inhibit tree and decidu-ous seedlings more compared with shrub and evergreen species?Does density dependence affect the wind and animal-dispersed species equally?Methods We established 135 census stations to monitor seedling dynamics in a 25-ha subtropical forest plot in central *** and heterospecific seedling density in the 1-m2 seedling plot and adult basal area within a 20-m radius provided neighborhood density *** elevation,convexity and aspect of every 5-×5-m grid with seedling plots were used to quantify habitat *** calculated the relative average phylodiversity between focal seed-ling and heterospecific neighbors to quantify the species related-ness in the *** candidate generalized linear mixed models with binominal error distribution were used to compare the relative importance of these variables to seedling ***’s information criteria were used to identify the most parsimonious *** Findingsat the community level,both the neighborhood densities and phylogenetic relatedness were important to seedling *** found negative effec

关键词： generalized linear mixed models negative density dependence niche partitioning phylodiversity seedling dynamics species coexistence

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Disentangling the effects of topography and space on the distributions of dominant species in a subtropical forest

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Chinese Science Bulletin 2014年第35期59卷 5113-5122页

作者： Qinggang Wang Yaozhan Xu Zhijun lu Dachuan Bao Yili Guo junmeng lu Kuihan Zhang Haibo Liu Hongjie Meng Xiujuan Qiao Handong Huang Mingxi Jiang Key Laboratory of Aquatic Botany and Watershed Ecology Wuhan Botanical GardenChinese Academy of Sciences University of Chinese Academy of Sciences

Topography and space are two important factors determining plant species assemblages in forest *** of the contribution of these two factors in determining species distribution helps us to evaluate their relative importance in determining species *** study aims to disentangle the effect of topography and space on the distributions of 14 dominant species in a subtropical mixed *** correlation analysis and the torustranslation test were used to test the species–habitat *** partitioning was used to quantify the relative contributions of topography and space at three sampling scales and three life *** analyses and torus-translation tests showed species abundance was mostly correlated with topographic wetness index,vertical distance from the channel network and *** partitioning showed that pure topography,pure space and spatially structured topography explained about 2.1 %,41.2 % and 13.8 %of the variation in species distributions,*** nine species,total topography fractions peaked in 20 m *** ten species,the pure space fractions peaked in 50 m *** many species,the total topography fraction andthe pure space fraction were larger for the most abundant life stages,which reflected the importance of sampling ***,some cases did not follow this trend suggesting that the effects of ecological processes such as habitat filtering,density dependence or dispersal limitation may exceed the sampling *** conclusion,we found that spatially structured topography and pure space primarily shaped the distribution of dominant tree ***,their effects were both scale- and life stage-dependent.

关键词：亚热带森林和空间优势种地形物种分布相关分析方差分解物种丰富度

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Effects of topography on structuring species assemblages in a subtropical forest

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Journal of Plant Ecology 2017年第3期10卷 440-449页

作者： Qinggang Wang Ruwan Punchi-Manage Zhijun lu Scott B.Franklin Zhiheng Wang Yaoqi Li Xiulian Chi Dachuan Bao Yili Guo junmeng lu Yaozhan Xu Xiujuan Qiao Mingxi Jiang Key Laboratory of Aquatic Botany and Watershed Ecology Chinese Academy of SciencesWuhanHubei 430074PR China Department of Ecology and Key Laboratory for Earth Surface Processes of the Ministry of Education College of Urban and Environmental SciencesPeking UniversityBeijing 100871PR China Department of Ecosystem Modeling University of GöttingenBüsgenweg 437077 GöttingenGermany Department of Ecological Modelling UFZ Helmholtz Centre for Environmental Research-UFZPF 50013604301 LeipzigGermany School of Biological Sciences University of Northern ColoradoGreeleyCO 80639-0017USA National Resource Center for Chinese Materia Medica China Academy of Chinese Medical SciencesBeijing 100700PR China College of Life Sciences University of Chinese Academy of SciencesBeijing 100049PR China

Aims Topography has long been recognized as an important factor in shaping species *** studies revealed that species may show species-habitat ***,few studies inves-tigate how species assemblages are associated with local habitats,and it still remains unclear how the community-habitat associa-tions vary with species abundance class and life *** this study,we analyzed the community-habitat associations in a subtropical montane *** The fully mapped 25-ha(500×500 m)forest plot is located in Badagongshan Nature Reserve in Hunan Province,Central *** was divided into 625(20×20 m)*** types were classified by multivariate regression tree analyses that cluster areas with similar species composition according to the topographic *** species analysis was used to identify the most important species for structuring species *** also compared the community-habitat associations for two levels of species abundances(*** and rare)and three different life stages(***,juveniles and adults),while accounting for sample size *** Findings The Badagongshan plot was divided into five distinct habitat types,which explained 34.7%of the variance in tree species *** with sample size taken into account,community-habi-tat associations for rare species were much weaker than those for abundant *** when accounting for sample size,very small differences were found in the variance explained by topography for the three life *** species of habitat types were mainly abundant species,and nearly all adult stage indicator species were also indicators in juvenile and sapling *** study manifested that topographical habitat filtering was important in shaping over-all local species ***,habitat filtering was not important in shaping rare species’distributions in this *** community-habitat association patterns in this fores

关键词： multivariate regression tree analysis habitat filtering rare species Badagongshan

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蛋白界面膜及其评价方法研究进展

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食品与发酵工业 2021年第1期47卷 285-292页

作者：卢筠梦赵雪徐幸莲南京农业大学食品科学与技术学院肉品加工与质量控制教育部重点实验室江苏南京210095

食品中乳化类产品的稳定性决定了其价值和顾客满意度,天然蛋白的乳化特性多年来受到食品胶体和界面科学领域广泛关注。蛋白吸附到水油界面形成的黏弹性薄膜具有降低界面张力、维持乳液稳定的特性。研究蛋白界面膜的物化性质有助于了解... 详细信息

食品中乳化类产品的稳定性决定了其价值和顾客满意度,天然蛋白的乳化特性多年来受到食品胶体和界面科学领域广泛关注。蛋白吸附到水油界面形成的黏弹性薄膜具有降低界面张力、维持乳液稳定的特性。研究蛋白界面膜的物化性质有助于了解蛋白大分子在水油界面的吸附规律,能够用于评价、表征和预测蛋白乳液稳定性,并为优化蛋白乳液稳定性提供理论基础。基于此,该文对水包油乳液蛋白界面膜结构和影响因素进行探讨,系统综述了目前用于评价蛋白质界面特性的手段和方法,包括微观成像技术、热力学技术、光谱技术和界面流变学技术等,以研究蛋白类乳化液性能在宏观和微观层面的联系,为蛋白质界面膜在乳化食品中的应用提供参考。

关键词：蛋白界面膜构象变化界面流变微观成像热力学光谱技术

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High-efficiency prediction method for helicopter global/ground noise based on near-field acoustic holography

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Chinese Journal of Aeronautics 2024年第7期37卷 271-284页

作者： Mengxue SHAO Yang lu Xice XU Jiaxin lu National Key Laboratory of Helicopter Aeromechanics Nanjing University of Aeronautics and AstronauticsNanjing 210016China

Noise reduction program design is an effective approach that relies on efficient noise prediction for reducing ground noise during *** existing noise prediction methods have the limitations of being computationally expensive or only applicable to *** this paper,a High-Efficiency Prediction Method(HEPM)for helicopter global/ground noise based on near-field acoustic holography is *** HEPM can predict the global noise based on acoustic modal analysis and has the advantages of high prediction accuracy and low time *** process is given as follows:firstly,the rotor noise on the holographic surface in the specified flight is obtained by simulations or ***,the global noise model,which maps time-domain noise to acoustic modes,is established based on near-field acoustic holography and Fourier acoustic analysis ***,combined with acoustic modal amplitude,the model established enables efficiently predicting the global/ground noise in the corresponding flight *** verify the accuracy of the prediction method,a simulation study is conducted in hovering and forward flight states using a model helicopter with a 2-meter rotor and Rotor Body Interaction(ROBIN)*** comparison of HEPM with numerical results shows that the average prediction errors of the global and ground noise are less than 0.3 dB and 0.2 dB,*** a region containing 100000 observers,the computation time of the HEPM is only one-fifth of that of the acoustic hemisphere method,demonstrating the rapidity of the proposed method.

关键词： Helicopter Rotor noise prediction Noise abatement procedure design Acoustic modal analysis Near-field acoustic holography

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Optical grade (Gd_(0.95-x)lu_(x)Eu_(0.05))_(3)Al_(5)O_(12) ceramics with near-zero optical loss: Effects of lu^(3+) doping on structural feature, microstructure evolution, and far-red luminescence

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Journal of Advanced Ceramics 2024年第1期13卷 113-123页

作者： Zhigang Sun Ji-Guang Li Huiyu Qian Yoshio Sakka Tohru SSuzuki Bin lu School of Materials Science and Chemical Engineering Ningbo UniversityNingbo 315211China Research Center for Electronic and Optical Materials National Institute for Materials ScienceIbaraki 305-0044Japan Key Laboratory of Photoelectric Detection Materials and Devices of Zhejiang Province Ningbo 315211China

A chemical co-precipitation strategy was employed to synthesize a series of(Gd_(0.95−x)lu_(x)Eu_(0.05))_(3)Al_(5)O_(12)(x=0.1−0.95)powder phosphors,followed by vacuum sintering to achieve transparent garnet ceramic *** density functional theory indicated lu_(3)Al_(5)O_(12) was formed in priority compared with Gd_(3)Al_(5)O_(12) during solid-phase *** high-temperature sintering,the lu^(3+)substitution for Gd^(3+)suppressed point mass diffusion leading to a smaller grain *** in-line transmittances of bulk specimens with x=0.1,0.3,0.5,0.7,and 0.95 nm were~83.5%,80.1%,68.8%,73.7%,and 82.2%at 710 nm(Eu^(3+)emission center),respectively,among which the sample of x=0.1 exhibited the optical grade with near-zero optical loss in agreement with the defect-free single crystal(~100%of the theoretical transmittance).The resulting particle and ceramic materials both presented characteristic Eu^(3+)emission arising from 5D0→7FJ(J=1−4)transition,where the dominant far-red emission at~710 nm arising from ^(5)D_(0)→^(7)F_(4) transition overlapped with the absorption of phytochrome(PFR).The photoluminescence excitation and photoluminescence intensities of(Gd_(0.95−x)lu_(x)Eu_(0.05))_(3)Al_(5)O_(12) powders and ceramics generally increased at a higher Gd^(3+)/lu^(3+)***^(3+)dopants delayed the fluorescence lifetime while the bulk samples had shorter lifetime compared to the particle *** transparent(Gd_(0.85)lu_(0.1)Eu_(0.05))3Al_(5)O_(12) ceramic phosphor exhibited good thermal stability with a high thermal quenching temperature above 533 *** designed ceramic phosphor-converted light-emitting diode had a saturation injection current of 435 mA and a current-dependent color rendering *** importantly,our report marked the developmental stage of transparent ceramic materials towards zero optical loss.

关键词： transparent ceramics garnet phosphors light-emitting diode(LED) optical properties Gibbs free energy

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Collective Molecular Machines: Multidimensionality and Reconfigurability

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Nano-Micro Letters 2024年第8期16卷 309-340页

作者： Bin Wang Yuan lu Department of Chemical Engineering Tsinghua UniversityBeijing 100084People’s Republic of China Key Laboratory of Industrial Biocatalysis Ministry of EducationTsinghua UniversityBeijing 100084People’s Republic of China

Molecular machines are key to cellular activity where they are involved in converting chemical and light energy into efficient mechanical *** the last 60 years,designing molecular structures capable of generating unidirectional mechanical motion at the nanoscale has been the topic of intense *** progress has been made,attributed to advances in various fields such as supramolecular chemistry,biology and nanotechnology,and ***,individual molecular machines are only capable of producing nanometer work and generally have only a single *** order to address these problems,collective behaviors realized by integrating several or more of these individual mechanical units in space and time have become a new *** this review,we comprehensively discuss recent developments in the collective behaviors of molecular *** particular,collective behavior is divided into two *** is the appropriate integration of molecular machines to efficiently amplify molecular motions and deformations to construct novel functional *** other is the construction of swarming modes at the supramolecular level to perform nanoscale or microscale *** discuss design strategies for both modes and focus on the modulation of features and ***,in order to address existing challenges,the idea of transferring experience gained in the field of micro/nano robotics is presented,offering prospects for future developments in the collective behavior of molecular machines.

关键词： Molecular machines Collective control Collective behaviors DNA Biomolecular motors

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Soil inorganic amendments produce safe rice by reducing the transfer of Cd and increasing key amino acids in brown rice

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Journal of Environmental Sciences 2024年第2期136卷 121-132页

作者： Fanyi Kong Shenggao lu Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment Key Laboratory of Environmental Remediation and Ecosystem HealthMinistry of EducationCollege of Environmental and Resource SciencesZhejiang UniversityHangzhou 310058China

The digestibility of cadmium(Cd)in brown rice is directly related to amino acid metabolism in rice and human *** our field study,three kinds of alkaline calcium-rich soil inorganic amendments(SIAs)at three dosages were applied to produce safe rice and improve the quality of rice in Cd-contaminated *** the increased application of SIA,Cd content in iron plaque on rice root significantly increased,the transfer of Cd from rice root to grain significantly decreased,and then Cd content in brown rice decreased *** vitro digestibility of Cd in brown rice was estimated by a physiologically based extraction *** showed that more than 70%of Cd in brown rice could be digested by simulated gastrointestinal *** on the total and digestible Cd contents in brown rice to evaluate the health risk,the application of 2.25 ton SIA/ha could produce safe rice in acidic slightly Cd-contaminated paddy *** amino acids(AAs)in brown rice were determined by high-performance liquid *** contents of 5 key AAs(KAAs)that actively respond to environmental changes increased significantly with the increased application of *** structural equation model indicated that KAAs could be affected by the Cd translocation capacity from rice root to grain,and consequently altered the ratio of indigestible Cd in brown *** formation of indigestible KAAs-Cd complexes by combining KAAs(phenylalanine,leucine,histidine,glutamine,and asparagine)with Cd in brown rice could be considered a potential mechanism for reducing the digestibility of Cd.

关键词： Cadmium digestibility Soil inorganic amendments Safe rice Amino acid Priming effect Health risk

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Bayesian brain computing and the free-energy principle: an interview with Karl Friston

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National Science Review 2024年第5期11卷 87-89页

作者： Wenlian lu the Institute of Science and Technology for Brain-Inspired Intelligence of Fudan University

The free-energy principle entails the Bayesian brain hypothesis that can be implemented by many schemes considered in this field. The combination of multimodal brain imaging and free-energy minimization has shown promise in unraveling complex brain dynamics and understanding the interactions among distinct brain regions. The Bayesian mechanics of brain computing gives a unique route to understanding authentic(neuromimetic) intelligence and, more importantly, points towards the development of brain-inspired intelligence.

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On the Monge–Kantorovich Mass Transfer Problem in Higher Dimensions

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Acta Mathematica Sinica,English Series 2024年第8期40卷 1989-2004页

作者： Xiao Jun lu School of Mathematics Southeast UniversityNanjing 210096P.R.China

This paper mainly investigates the approximation of a global maximizer of the Monge–Kantorovich mass transfer problem in higher dimensions through the approach of nonlinear partial differential equations with Dirichlet *** an approximation mechanism,the primal maximization problem can be transformed into a sequence of minimization *** applying the systematic canonical duality theory,one is able to derive a sequence of analytic solutions for the minimization *** the final analysis,the convergence of the sequence to an analytical global maximizer of the primal Monge–Kantorovich problem will be demonstrated.

关键词： Monge-Kantorovich mass transfer singular variational problem canonical duality theory

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