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Journal of Plant Ecology 2020年第3期13卷 323-330页

作者： Wei Xue Lin Huang fei-hai yu Institute of Wetland Ecology&Clone Ecology/Zhejiang Provincial Key Laboratory of Evolutionary Ecology and Conservation Taizhou UniversityShifu Road 1139Jiaojiang DistrictTaizhouZhejiang Province 318000China

在异质性环境中,植物能够通过将更多的生物量投资到高资源斑块而获利。因此,相对于高资源斑块的初始生长位置可能会对植物的生长和竞争能力产生影响,且这种影响可能与植物的构型有关。然而,以往有关土壤异质性对植物生长和竞争影响的研... 详细信息

在异质性环境中,植物能够通过将更多的生物量投资到高资源斑块而获利。因此,相对于高资源斑块的初始生长位置可能会对植物的生长和竞争能力产生影响,且这种影响可能与植物的构型有关。然而,以往有关土壤异质性对植物生长和竞争影响的研究都忽略了植物初始生长位置的潜在效应。在本研究中,我们把密集型克隆植物翼果苔草(Carex neurocarpa)和游击型克隆植物扁秆荆三棱(Bolboschoenus planiculmis)分别单独种植(不存在竞争)或者混合种植(存在竞争)在由高营养斑块和低营养斑块组成的异质性环境中。在不存在竞争处理时,每种植物的一个分株被分别单独种植于高营养或者低营养斑块中;在存在竞争处理时,目标种的一个分株被种植于高营养斑块中,而竞争种被种植在这个高营养斑块中或者邻近的低营养斑块中,或目标种的一个分株被种植于低营养斑块中,而竞争种被种植在这个低营养斑块中或者邻近的高营养斑块中。结果表明,在不存在竞争时,初始生长位置处于高营养斑块的翼果苔草的生物量和分株数均显著高于初始位置处于低营养斑块的翼果苔草,但在存在竞争时,却未发现这种差异。因此,初始位置处于高营养斑块的翼果苔草受到的竞争强度要显著高于初始位置处于低营养斑块的翼果苔草,而且这种效应与其竞争者的初始生长位置无关。相反的,扁秆荆三棱的初始生长位置对其生长和竞争的响应没有影响。因此,在异质性环境中,克隆植物的初始生长位置能够影响其生长和相对竞争能力,并且这些效应可能取决于植物的克隆构型。

关键词：克隆植物竞争环境异质性游击型斑块环境密集型

Spatial heterogeneity in soil particle size:does it affect the yield of plant communities with different species richness?

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Journal of Plant Ecology 2016年第5期9卷 608-615页

作者： Wei Xue Lin Huang fei-hai yu School of Nature Conservation Beijing Forestry UniversityBeijing 100083China

Aims Soil heterogeneity is ubiquitous in many *** hypothesized that plant communities with higher species richness might be better adapted to soil heterogeneity and produce more biomass than those with lower *** is because there is niche differentiation among species and different species can complement each other and occupy a broader range of niches when plant species richness is ***,no study has tested how soil particle heterogeneity affects the yield of plant communities,and whether such effects depend on the spatial scale of the heterogeneity and the species richness within the *** In a greenhouse experiment,we sowed seeds of four-species or eight-species mixtures in three heterogeneous treatments consisting of 32,8 or 2 patches of both small(1.5 mm)and large quartz(3.0 mm)particles arranged in a chessboard manner and one homogeneous treatment with an even mixture of small and large quartz *** Findings Biomass production was significantly greater in the communities with high species richness than those with low species ***,soil particle heterogeneity or its interactions with patch scale or species richness did not significantly affect biomass production of the experimental *** work indicates that plant species richness may have a bigger impact on plant productivity than soil particle *** studies should consider multiple sets of plant species during longer time periods to unravel the potential mechanisms of soil heterogeneity and its interactions with the impacts of species richness on community yield and species coexistence.

关键词： diversity effect experimental communities environmental heterogeneity patch size soil particle heterogeneity spatial scale

Effect of navigation endoscopy combined with threedimensional printing technology in the treatment of orbital blowout fractures

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International Journal of Ophthalmology(English edition) 2024年第3期17卷 570-576页

作者： Jin-hai yu Yao-Hua Wang Qi-Hua Xu Chao Xiong An-An Wang Hong-fei Liao School of Optometry Jiangxi Medical CollegeNanchang UniversityNanchang 330006Jiangxi ProvinceChina The Affiliated Eye Hospital Jiangxi Medical CollegeNanchang UniversityNanchang 330006Jiangxi ProvinceChina Jiangxi Clinical Research Center for Ophthalmic Disease Nanchang 330006Jiangxi ProvinceChina Jiangxi Research Institute of Ophthalmology and Visual Science Nanchang 330006Jiangxi ProvinceChina Jiangxi Provincial Key Laboratory for Ophthalmology Nanchang 330006Jiangxi ProvinceChina

●AIM:To explore the combined application of surgical navigation nasal endoscopy(NNE)and three-dimensional printing technology(3DPT)for the adjunctive treatment of orbital blowout fractures(OBF).●METHODS:Retrospective analysis was conducted on the data of patients with OBF who underwent surgical treatment at the Affiliated Eye Hospital of Nanchang University between July 2012 and November *** control group consisted of patients who received traditional surgical treatment(n=43),while the new surgical group(n=52)consisted of patients who received NNE with *** difference in therapeutic effects between the two groups was evaluated by comparing the duration of the operation,best corrected visual acuity(BCVA),enophthalmos difference,recovery rate of eye movement disorder,recovery rate of diplopia,and incidence of postoperative complications.●RESULTS:The study included 95 cases(95 eyes),with 63 men and 32 *** patients’age ranged from 5 to 67y(35.21±15.75y).The new surgical group and the control group exhibited no statistically significant differences in the duration of the operation,BCVA and enophthalmos *** recovery rates of diplopia in the new surgical group were significantly higher than those in the control group at 1mo[OR=0.03,95%CI(0.01–0.15),P<0.0000]and 3mo[OR=0.11,95%CI(0.03–0.36),P<0.0000]***,the recovery rates of eye movement disorders at 1 and 3mo after surgery were OR=0.08,95%CI(0.03–0.24),P<0.0000;and OR=0.01,95%CI(0.00–0.18),P<*** incidence of postoperative complications was lower in the new surgical group compared to the control group[OR=4.86,95%CI(0.95–24.78),P<0.05].●CONCLUSION:The combination of NNE and 3DPT can shorten the recovery time of diplopia and eye movement disorder in patients with OBF.

关键词： orbital blowout fracture three-dimensional printing endoscopy surgical navigation

Parallel Light Fields: A Perspective and A Framework

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IEEE/CAA Journal of Automatica Sinica 2024年第2期11卷 542-544页

作者： fei-yue Wang yu Shen IEEE State Key Laboratory for Management and Control of Complex Systems Institute of AutomationChinese Academy of SciencesBeijing 100190China School of Artificial Intelligence University of Chinese Academy of ScienceBeijing 100049

Dear Editor,Light fields give relatively complete description of scenes from perspective of angles and positions of rays. At present time, most of the computer vision algorithms take 2D images as input which are simplified expression of light fields with depth information discarded. In theory, computer vision tasks may achieve better performance as long as complete light fields are acquired.

关键词： computer Framework simplified

Derivation of Expanded Isospectral-Nonisospectral Integrable Hierarchies via the Column-vector Loop Algebra

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Acta Mathematicae Applicatae Sinica 2024年第3期40卷 778-800页

作者： hai-feng WANG yu-feng ZHANG School of Science Jimei UniversityXiamen 361021China School of Mathematics China University of Mining and TechnologyXuzhou 221116China

A scheme for generating nonisospectral integrable hierarchies is *** on the method,we deduce a nonisospectral hierarchy of soliton equations by considering a linear spectral *** follows that the corresponding expanded isospectral and nonisospectral integrable hierarchies are deduced based on a 6 dimensional complex linear space ■.By reducing these integrable hierarchies,we obtain the expanded isospectral and nonisospectral derivative nonlinear Schr?dinger *** using the trace identity,the biHamiltonian structure of these two hierarchies are also ***,some symmetries and conserved quantities of the resulting hierarchy are discussed.

关键词： expanded isospectral-nonisospectral integrable hierarchies column-vector loop algebra bi-Hamiltonian structure symmetry

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Multiparameter Numerical Investigation of Two Types of Moving Interactions Between the Deep-Sea Mining Vehicle Track Plate and Seabed Soil:Digging and Rotating Motions

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China Ocean Engineering 2024年第3期38卷 408-423页

作者： SUN Peng-fei Lyu hai-ning YANG Jian-min XU Zhi-yong State Key Laboratory of Ocean Engineering Shanghai Jiao Tong UniversityShanghai 200240China Yazhou Bay Institute of Deepsea SCI-TECH Shanghai Jiao Tong UniversitySanya 572024China Institute of Marine Equipment Shanghai Jiao Tong UniversityShanghai 200240China

To ensure the safe performance of deep-sea mining vehicles(DSMVs),it is necessary to study the mechanical characteristics of the interaction between the seabed soil and the track *** rotation and digging motions of the track plate are important links in the contact between the driving mechanism of the DSMV and seabed *** this study,a numerical simulation is conducted using the coupled Eulerian–Lagrangian(CEL)large deformation numerical method to investigate the interaction between the track plate of the DSMV and the seabed soil under two working conditions:rotating condition and digging ***,a soil numerical model is established based on the elastoplastic mechanical characterization using the basic physical and mechanical properties of the seabed soil obtained by in situ ***,the soil disturbance mechanism and the dynamic mechanical response of the track plate under rotating and digging conditions are obtained through the analysis of the sensitivity of the motion parameters,the grouser structure,the layered soil features and the soil *** results indicate that the above parameters remarkably influence the interaction between the DSMV and the seabed ***,it is important to consider the rotating and digging motion of the DSMV in practical engineering to develop a detailed optimization design of the track plate.

关键词： deep-sea mining vehicle rotating motion digging motion track plate-seabed soil interaction CEL numerical method

Reduction of unactivated alkyl chlorides enabled by light-induced single electron transfer

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Science China Chemistry 2024年第2期67卷 471-481页

作者： Lei Dai Zhao-fei Zhang Xiang-yu Chen School of Chemical Sciences University of the Chinese Academy of SciencesBeijing100049China Institute of Chemistry Chinese Academy of SciencesBeijing100190China Binzhou Institute of Technology Weiqiao-UCAS Science and Technology ParkBinzhou256606China

Alkyl chlorides are abundant and easily accessible starting ***,due to the high reduction potentials associated with unactivated alkyl chlorides,achieving their single electron reduction remains a persistent *** challenge has spurred the exploration of efficient activation methods to overcome this *** recent years,photocatalysis has emerged as a mild and potent tool for the single electron reduction of unactivated alkyl chlorides,opening up new possibilities in this *** the rapid advancements in this area,a comprehensive review that provides a conceptual understanding of this emerging field,with a specific focus on reaction design and catalytic mechanisms,would be timely and highly ***,we present an overview of various synthetic techniques for photoinduced single electron reduction of unactivated alkyl ***,we also discuss the limitations of the present methods and future directions that lie ahead in this field.

关键词： photocatalysis unactivated alkyl chlorides single electron transfer radical reactions

植物多样性而非其土壤遗留效应影响外来植物入侵

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Journal of Plant Ecology 2022年第3期15卷 639-649页

作者： Wei Xue Si-Mei Yao Lin Huang Sergio RRoiloa Bao-Ming Ji fei-hai yu Institute of Wetland Ecology&Clone Ecology/Zhejiang Provincial Key Laboratory of Evolutionary Ecology and Conservation Taizhou UniversityTaizhou 318000China BioCost Group Biology DepartmentUniversidade da CoruñaA Coruña 15071Spain School of Grassland Science Beijing Forestry UniversityBeijing 100083China

植物多样性可以影响外来植物入侵,然而植物多样性的土壤遗留效应是否能够影响外来植物入侵目前仍不清楚。植物多样性能够改变土壤微生物群落和土壤理化性质,这种遗留效应可能会对该土壤中外来植物的生长产生影响。因此,我们假设植物多... 详细信息

植物多样性可以影响外来植物入侵,然而植物多样性的土壤遗留效应是否能够影响外来植物入侵目前仍不清楚。植物多样性能够改变土壤微生物群落和土壤理化性质,这种遗留效应可能会对该土壤中外来植物的生长产生影响。因此,我们假设植物多样性的土壤遗留效应会影响外来植物的入侵。为了检验该假说,我们开展了一个两阶段的植物-土壤反馈实验。在土壤驯化阶段,我们将12个植物物种(4种禾草植物、3种豆科植物和5种杂类草植物)分别单独种植,或者随机选择8个物种(包含3个功能型)混合种植在土壤中。在反馈阶段,我们将入侵植物三叶鬼针草(Bidens pilosa)分别与本地禾草荩草(Arthraxon hispidus)、本地杂类草翅果菊(Pterocypsela indica)或者同时与荩草和翅果菊种植在被驯化过的土壤中。研究结果显示,三叶鬼针草相对于其本地竞争植物的生长取决于驯化植物和竞争植物物种的功能型。驯化植物的多样性对三叶鬼针草与其本地竞争植物之间的生长差异没有显著影响。然而,随着本地竞争植物物种多样性的增加,三叶鬼针草相对于其本地竞争植物的生长显著降低。这些结果表明,当前的植物多样性可以通过增加入侵植物和本地植物之间的生长不平衡性来减少外来植物的入侵。但是,植物多样性的土壤遗留效应对外来植物入侵的影响可能很小。

关键词：三叶鬼针草(Bidens pilosa) 竞争平衡多样性效应入侵植物植物-土壤反馈

Strength and ductility optimization of HPDC AlSi8MgCuZn2 alloys by modifying pre-aging treatment

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China Foundry 2024年第4期21卷 343-351页

作者： yuan-hang Jiang Hui-ting Zheng fei Liu hai-dong Zhao National Engineering Research Center of Near-net Shape Forming for Metallic Materials South China University of TechnologyGuangzhou 510641China

Considering the components produced by high pressure die casting(HPDC)process usually with ultra-large sizes and complex morphologies,high temperature solid solution treatment is not a suitable method to further improve their mechanical *** this study,two-stage aging treatment with different pre-aging times was designed and employed to further improve the mechanical properties of HPDC Al8SiMgCuZn *** characteristics of precipitates were evaluated by a transmission electron microscope(TEM),and the precipitation strengthening mechanism was *** results reveal that the strengthening is mainly contributed by the precipitation ofβ″phase after two-stage aging,and the number density and size of the precipitates are significantly depended on the pre-aging *** number density of precipitates is increased with the pre-aging time prolonged from 0 h to 4 h,and then decreases with the further increase of pre-aging time from 4 h to 6 *** precipitates with the highest density and smallest size are observed after pre-aging for 4 *** pre-aged at 100℃for 4 h and then artificial aged at 200℃for 30 min,the yield strength of 207 MPa,ultimate tensile strength of 325 MPa and elongation of 7.6%are achieved.

关键词： high pressure die cast aluminum alloy microstructural heterogeneity mechanical properties precipitation strengthening two-stage aging

克隆植物蛇莓对光照强度和养分条件的适应性可塑性

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Journal of Plant Ecology 2022年第4期15卷 795-807页

作者： Mo-Zhu Wang Hong-Li Li Chun-Xiang Liu Bi-Cheng Dong fei-hai yu Institute of Wetland Ecology&Clone Ecology Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and ConservationTaizhou UniversityTaizhou 318000China School of Ecology and Nature Conservation Beijing Forestry UniversityBeijing 100083China State Key Laboratory of Systematic and Evolutionary Botany Institute of BotanyChinese Academy of SciencesBeijing 100093China

表型可塑性可帮助植物缓冲环境压力并使其表型与当地环境相匹配,但目前仅少数性状的可塑性被广泛认为是适应性的。为充分理解可塑性的适应性意义,仍需进一步研究更多的植物功能性状及其环境因子。本研究将匍匐茎克隆植物蛇莓(Duchesnea ... 详细信息

表型可塑性可帮助植物缓冲环境压力并使其表型与当地环境相匹配,但目前仅少数性状的可塑性被广泛认为是适应性的。为充分理解可塑性的适应性意义,仍需进一步研究更多的植物功能性状及其环境因子。本研究将匍匐茎克隆植物蛇莓(Duchesnea indica)的21个基因型种植于不同的光照和养分条件下,并利用选择梯度分析检测了形态和生理可塑性对光照强度和养分有效性变化的适应性值。在遮荫条件下,蛇莓适合度(果实数、分株数和生物量)降低,节间缩短变细,成熟叶叶绿素含量降低,但叶柄长度、比叶面积、老叶叶绿素含量均增加。在低养分条件下,植株叶柄缩短,叶面积缩小变厚,叶绿素含量降低,但果实数量和根冠比增加。选择梯度分析表明,叶柄长度和老叶叶绿素含量对光照变化的可塑性是适应性的,老叶和成熟叶叶绿素含量对养分变化的可塑性也是适应性的。因此,不同性状的可塑性适应值取决于特定的生态背景。该研究的发现有助于理解克隆植物表型可塑性响应环境变化的适应性意义。

关键词：适应性可塑性克隆植物蛇莓(Duchesnea indica) 匍匐茎植物表型