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Mapping species assemblages of tropical forests at different hierarchical levels based on multivariate regression trees

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Forest Ecosystems 2023年第3期10卷 387-397页

作者： Qi Yang Maaike Y.Bader Guang Feng jialing li Dexu Zhang Wenxing Long Wuzhishan National Long Term Forest Ecosystem Research Station College of ForestryHainan UniversityHaikou570228China Ecological Plant Geography Faculty of GeographyUniversity of MarburgDeutschhausstrasse 1035032MarburgGermany Wuzhishan Division of Hainan Tropical Rainforest National Park Bureau Wuzhishan572200China

Background: Vegetation distribution maps are of great significance for nature protection and management. In diverse tropical forests, accurate spatial mapping of vegetation types is challenging;the high species diversity and abundance of rare species challenge classification concepts, while remote sensing signals may not vary systematically with species composition, complicating the technical capability for delineating vegetation types in the ***: We used a combination of field-based compositional data and their relations to environmental variables to predict the distribution of forest types in the Wuzhishan National Natural Reserve(WNNR), Hainan Island,China, using multivariate regression trees(MRT). The MRT was based on arboreal vegetation composition in 132plots of 20 m×20 m with a regular spacing of 1 km. Apart from the MRT, non-metric multidimensional scaling(NMDS) was used to evaluate vegetation-environment ***: The MRT model worked best when using 14 key environmental variables including topography, climate,latitude and soil, although the difference with the simpler model including only topographical variables was small. The full model classified the 132 plots into 3 vegetation types, 6 formation groups, 20 formations and 65associations at different hierarchical syntaxonomic levels. This model was the basis for forest vegetation maps for the WNNR. MRT and NMDS showed that elevation was the main driving force for the distribution of vegetation types and formation groups. Climate, latitude, and soil(especially available P), together with topographic variables, all influenced the distribution of formations and ***: While elevation determines forest-type distributions, lower-level syntaxonomic forest classes respond to the topographic diversity typical for mountains. Apart from providing the first detailed forest vegetation map for any part of WNNR, we show how, in spite of limitations, MRT with existing enviro

关键词： Species assemblages Tropical forest Mapping Multivariate regression trees Non-metric multidimensional scaling

Comparative study of liNiO_2, liNi_(0.8)Co_(0. 2)O_2 and liNi_(0.75)Al_(0.25)O_2 for lithium-ion batteries

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Journal of University of Science and Technology Beijing 2002年第6期9卷 448-452页

作者： Chuangang lin, Weihua Qiu, Zhimin li, jialing Hong, Huanyu Hu, and Zhongqin LuLaboratory on Solid State Ionics, University of Science and Technology Beijing, Beijing 100083, China Lab. on Solid State Ionics Univ. of Sci. and Technol. Beijing Beijing 100083 China

The comparative study of liNi_(0.8)Co_(0.2)O_2 and liNi_(0.75)A_(0.25)O_2 wascarried out by X-ray diffraction (XRD) and electrochemical methods. The results show that Co and Aldoping suppress the phase transition during charge-discharge. The experiments indi cate thatliNi_(0.75)Al_(0.25)O_2 has the better cycle-ability and over-charge resistance comparing withliNi_(0.8)Co_(0.2)O_2. The interfacial behavior was studied by use of electrochemical impedancespectroscopy (EIS). The results show that liNi_(0.75)Al_(0.25)O_2 has a slightly larger polarizationcharacter than liNi_(0.8)Co_(0.2)O_2.

关键词： lithium-ion batteries lithium nickel oxide cathod materials

Community structure and carbon metabolism functions of bacterioplankton in the Guangdong coastal zone

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Marine life Science & Technology 2024年第3期6卷 547-561页

作者： Ziqi Peng Pandeng Wang Xiaoqing Luo Qiqi Deng Ziwen Yang Jiaxue Wu Wendong Xian Weicong Yan Xiaozhen Mou Yang Yuan Wenjun li jialing li State Key Laboratory of Biocontrol Guangdong Provincial Key Laboratory of Plant Stress BiologySchool of Marine SciencesSchool of EcologySchool of Life SciencesSun Yat-Sen UniversityGuangzhou 510275China Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou 511458China Department of Biological Sciences Kent State UniversityKentOH 44242USA Marine Microorganism Ecological&Application Lab Marine Science and Technology CollegeZhejiang Ocean UniversityZhoushan 316000China

Coastal ecosystems are an important region for biogeochemical cycling,are a hotspot of anthropogenic disturbance and play a crucial role in global carbon cycling through the metabolic activities of *** can be broadly classified into two lifestyles:free-living(FL)and particle-attached(PA).However,how coastal bacterioplankton the community structure,co-occurrence networks and carbon metabolic functions with different lifestyles are differentiated is still largely *** these processes is necessary to better determine the contributions of coastal bacterioplankton to carbon ***,the characteristics of community structure and carbon metabolism function of bacterioplankton with two lifestyles in the coastal areas of Guangdong Province were investigated using amplicon sequencing,metagenomic,and metatranscriptomic *** results show that the main bacterioplankton responsible for carbon metabolism were the Pseudomonadota,Bacteroidota,and *** microbial community structure,carbon metabolic function,and environmental preferences differ between different *** and PA bacteria exhibited higher carbon fixation and degradation potentials,respectively.A range of environmental factors,such as dissolved oxygen,pH,and temperature,were associated with the community structure and carbon metabolic functions of the *** activities,such as nutrient discharge,may affect the distribution of functional genes and enhance the carbon degradation functions of *** conclusion,this study increased the understanding of the role of microorganisms in regulating carbon export in coastal ecosystems with intense human activity.

关键词： Particle-attached and free-living bacterioplankton Community structure Carbon metabolism Coastal ecosystem

Design of copper oxide and oxygen codoped graphitic carbon nitride activator for efficient radical and nonradical activation of peroxymonosulfate

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Chinese Chemical Letters 2023年第6期34卷 184-190页

作者： lin Wei jialing li Chengyun Zhou Biao Song Fanzhi Qin Wenjun Wang Hanzhuo Luo Deyu Qin Cheng Huang Chen Zhang Yang Yang College of Environmental Science and Engineering Hunan University and Key Laboratory of Environmental Biology and Pollution ControlMinistry of Education(Hunan University)Changsha 410082China School of Design Hunan UniversityChangsha 410082China School of Resources and Environment Hunan University of Technology and BusinessChangsha 410205China Department of Chemical and Materials Engineering University of AlbertaEdmontonAlberta T6G 1H9Canada

Rational regulation of stable graphitic carbon nitride(CN)for superior peroxymonosulfate(PMS)activation is important in the catalytic degradation of water *** this work,the copper oxide and oxygen co-doped graphitic carbon nitride(Cu O/O-CN)was prepared via one-step synthesis and applied in activating PMS for oxytetracycline(OTC)degradation,displaying superior catalytic *** characterization and theoretical calculations indicated that the synergistic effect between the oxygen site of CN and CuO can modulate the electronic structure of the whole composite further facilitating the formation of non-radical^(1)O_(2)and various reactive *** of the influencing factor experiments revealed that CuO/O-CN has a strong resistance to the environmental *** degradation efficiency of OTC in the real water environment even exceeded that in the deionized *** four successive runs of the optimal catalyst,the OTC removal rate was still as high as 91.3%.This work developed a high-efficiency PMS activator to remove refractory pollutants via both radical pathway and non-radical pathway,which showed a promising potential in the treatment of wastewaters.

关键词： Graphitic carbon nitride Codoping Peroxymonosulfate Antibiotics Advanced oxidation process

Influence of weak magnetic field on Sb(V)immoblization by zero valent iron:Performance and mechanisms

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Influence of weak magnetic field on Sb(V)immoblization by ze...

Synthesis and application of a novel waterborne polyurethane emulsion for sand fixation

2014年第12届全国水处理化学大会

作者： Zhongjin Xiao jialing li Xiaohong Guan Department of Municipal Engineering Tongji University

Antimony(Sb)is consumed worldwide in a variety of industries and antimony compounds are considered to be pollutants of priority interest with stringent wastewater discharge *** methods have been reported for the sequestration of ***,they cannot effectively remove Sb to meet stringent regulations particularly at high initial Sb concentration.

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Journal of Bioresources and Bioproducts 2017年第3期2卷 142-149页

作者： Leihao Zheng Yan Xue Weilin lin jialing li Sha Qian School of Chemistry and Chemical Engineering Oil&Gas Field Applied Chemistry Key Laboratory of Sichuan ProvinceSouthwest Petroleum UniversityChengdu 610500China

Desertification is one of the severe ecological and environmental issues in the world *** fixation against wind erosion is an effective solution to the *** the present study,a novel waterborne polyurethane emulsion was prepared as a sand-fixing *** and polylactic acid were incorporated as a chain extender and soft segments,*** structure,viscosity and thermal stability of the polyurethane emulsions were studied by FTIR,rheological testing and differential scanning calorimetry(DSC).The sand fixation properties of the waterborne polyurethane were evaluated in terms of the water retention,compressive strength,thermal stability and anti-wind erosion ability of sand crusts formed by spraying the emulsion on *** the increase of lignin content,both the water retention and compressive strength increased with the highest values of 39.22%and 1.13 MPa,*** the sand specimens treated by the waterborne polyurethane presented good thermal stability and wind erosion resistance.

关键词： Waterborne polyurethane lignin Sand-fixing agent Polylactic acid

脊髓损伤患者创伤后应激障碍、社会支持与生存质量的现状调查及相关性分析

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中国医学科学院学报 2020年第6期42卷 723-731页

作者：李佳岭冯先琼四川大学华西医院头颈肿瘤科成都610047 四川大学华西医院华西护理学院成都610041

目的探讨中国康复中后期脊髓损伤患者创伤后应激障碍、社会支持与生存质量的关系及生存质量相关的影响因子。方法采用横断面研究设计,多阶段分层抽样与滚雪球抽样相结合的方法,抽取曾在9所不同等级的医院中住院治疗的206例脊髓损伤患者... 详细信息

目的探讨中国康复中后期脊髓损伤患者创伤后应激障碍、社会支持与生存质量的关系及生存质量相关的影响因子。方法采用横断面研究设计,多阶段分层抽样与滚雪球抽样相结合的方法,抽取曾在9所不同等级的医院中住院治疗的206例脊髓损伤患者为研究对象。使用一般资料、创伤后应激障碍清单、社会支持量表及世界卫生组织生存质量测定量表简表进行资料收集,对资料进行统计描述,以t检验、多元线性回归及调节效应分析等对相关因素进行统计分析。结果创伤后应激障碍与生存质量呈显著负相关(r=-0.337,P<0.001),社会支持与生存质量呈显著正相关(r=0.318,P<0.001)。社会支持在创伤后应激障碍警觉症状维度与总体生存质量(β=0.324,P=0.032)及其环境领域(β=0.227,P=0.004)间表现出正向调节作用,在创伤后应激障碍闯入症状维度与生存质量环境领域间(β=-0.125,P=0.017)表现出负向调节作用。创伤后应激障碍、社会支持及性别、婚姻状况、经济状况等一般资料是生存质量各领域的显著预测因素。结论减轻创伤后应激障碍、提高社会支持水平可促进脊髓损伤患者长期维持较好的生存质量。

关键词：脊髓损伤创伤后应激障碍社会支持生存质量

两种快速扩弓方式联合前方牵引治疗骨性Ⅲ类错[牙合]的疗效差异分析

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中华口腔医学杂志 2023年第4期58卷 318-328页

作者：韩磊李佳岭李保超李煌南京大学医学院附属口腔医院·南京市口腔医院正畸科南京210008

目的比较骨支抗方式和牙支持方式快速扩弓联合前方牵引治疗上颌发育不足的骨性Ⅲ类错[牙合]的疗效差异。方法回顾性选取2020年8月至2022年6月于南京大学医学院附属口腔医院·南京市口腔医院正畸科进行快速扩弓联合前方牵引治疗的处于替... 详细信息

目的比较骨支抗方式和牙支持方式快速扩弓联合前方牵引治疗上颌发育不足的骨性Ⅲ类错[牙合]的疗效差异。方法回顾性选取2020年8月至2022年6月于南京大学医学院附属口腔医院·南京市口腔医院正畸科进行快速扩弓联合前方牵引治疗的处于替牙列中晚期或恒牙列早期的骨性Ⅲ类错[牙合]伴上颌发育不足的患者26例。患者分为2组(每组13例):骨支抗方式组使用骨支抗方式快速扩弓联合前方牵引装置进行矫治,其中男性4例,女性9例,年龄(10.2±1.7)岁;牙支持方式组使用牙支持方式快速扩弓联合前方牵引装置进行矫治,其中男性5例,女性8例,年龄(10.1±1.0)岁。于矫治前后头颅侧位X线片上测量矢状向线性指标[Y-Is距和Y-Ms距(分别为上切牙切缘点、上颌第一恒磨牙近中接触点至垂直参考轴的距离)、上下颌磨牙相对距离、前牙覆盖等]10项、垂直向线性指标[PP-Ms距(上颌第一恒磨牙近中接触点至腭平面的距离)等]6项和角度指标[SN-MP角(前颅底平面与下颌平面相交的上外角)、U1-SN角(上中切牙长轴与前颅底平面相交的下内角)等]8项,于矫治前后锥形束CT上测量冠状向指标(上颌左侧和右侧第一磨牙倾斜度等)6项;计算矫治前后前牙覆盖变化量中骨性效应和牙性效应占比。比较各指标矫治前后变化量的组间差异。结果矫治后两组前牙反均解除,磨牙建立中性或远中关系。骨支抗方式组Y-Is距、Y-Ms距、上下颌磨牙相对距离的矫治前后变化量[分别为(3.23±0.70)、(1.25±0.34)和(2.54±0.59)mm]均显著小于牙支持方式组[分别为(4.96±0.97)、(3.12±0.83)和(4.92±1.35)mm](t=-5.92,P<0.001;t=-7.53,P<0.001;t=-5.85,P<0.05)。骨支抗方式组前牙覆盖矫治前后变化量[(4.45±1.25)mm]显著小于牙支持方式组[(6.14±1.29)mm](t=-3.38,P<0.05);骨支抗方式组前牙覆盖矫治前后变化量中骨性效应占80%,牙性效应占20%;牙支持方式组前牙覆盖矫治前后变化量中骨性效应占62%,牙性效应占38%。骨支抗方式组PP-Ms距矫治前后变化量[(-1.62±0.25)mm]显著小于牙支持方式组[(2.13±0.86)mm](t=-15.15,P<0.001)。骨支抗方式组SN-MP角、U1-SN角矫治前后变化量(分别为-0.95°±0.55°、1.28°±1.30°)显著小于牙支持方式组(1.92°±0.95°、7.78°±1.94°)(t=-9.43,P<0.001;t=-10.04,P<0.001)。骨支抗方式组上颌左侧和右侧第一磨牙倾斜度矫治前后变化量(分别为1.50°±0.17°、1.54°±0.19°)均显著小于牙支持方式组(分别为2.26°±0.37°、2.25°±0.35°)(t=6.47,P<0.001;t=6.81,P<0.001)。结论骨支抗方式快速扩弓联合前方牵引能减少传统牙支持方式快速扩弓联合前方牵引时发生的上前牙唇倾、前牙覆盖增加、磨牙前移伸长颊倾以及下颌平面角增大等不利的牙齿代偿效应。

关键词：错[牙合],安氏Ⅲ类正畸矫正器设计腭扩张术正畸支抗上颌快速扩弓前方牵引

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增压双VVT汽油机缸内充量工程化建模方法

内燃机学报 2022年第4期40卷 314-321页

作者：孙鹏远王强苍贺成龙立李家玲中国第一汽车集团公司智能网联开发院吉林长春130000

针对由涡轮增压和进/排气双可变气门正时(VVT)构成的复杂进气系统,以缸内直喷汽油机为研究对象,采用对比态原理,通过理论推导和数据分析,提出了可变气门正时权重因子的概念,并对构成缸内充量的各种气量进行了机理-数据混合工程化建模.... 详细信息

针对由涡轮增压和进/排气双可变气门正时(VVT)构成的复杂进气系统,以缸内直喷汽油机为研究对象,采用对比态原理,通过理论推导和数据分析,提出了可变气门正时权重因子的概念,并对构成缸内充量的各种气量进行了机理-数据混合工程化建模.结果表明:该建模方法能够准确计算缸内新鲜充量和扫气量,用进/排气气门角度全因子扫描时,94%以上的数据点计算误差小于±5%;用目标进/排气气门角度进行数据验证时,全部数据点计算误差小于±5%;满足车辆应用对发动机充气模型的计算精度要求.

关键词：汽油机缸内充量可变气门正时涡轮增压扫气