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Ecological variations of woody species along an altitudinal gradient in the Qinling Mountains of Central China:area-based versus mass-based expression of leaf traits

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Journal of Forestry Research 2021年第2期32卷 599-608页

作者： Yongfu Chai hailin.Shang Xiaofei Zhang Ruichang Zhang Xiao liu Ming Yue Key Laboratory of Resource Biology and Biotechnology in Western China(Northwest University) Ministry of EducationTaibai North Rd.229Xi’an 710069Shaanxi ProvinceChina Environmental Protection Research Institute Xi’an Research Institute of China Coal Technology and Engineering Group CorpXi’anChina Plant Ecology Department University of TuebingenAuf der Morgenstelle 372076 TuebingenGermany

Leaf trait-based research has become the preferred method to understand the ecological strategies of ***,there is still a debate on whether area-based or mass-based traits provide different insights into environmental adaptations and *** this study,seven key leaf traits(maximum net photosynthetic rate,dark respiration rate,nitrogen content,photosynthetic nitrogen use efficiency,leaf mass per area,leaf dry matter contents and leaf area)of 43 woody species were quantified on the basis of both area and mass along an altitudinal gradient(1100–2700 m)in the Qinling Mountains of *** in leaf traits and bivariate correlations between the two expressions were *** considering different expressions,the strengths and directions of the responses of leaf traits to the altitudinal gradient were *** traits showed large variations;interspecific variations contributed more to total variance than intraspecific *** correlations between photosynthetic traits and structural traits(mass per area,dry matter content,and area)were weaker on a mass basis than those on an area *** traits exhibited quadratic trends along the altitudinal gradient,and these patterns were more noticeable for area-based than mass-based ***-based traits were more sensitive to changes in temperature and precipitation associated with *** results provide evidence that mass-versus area-based traits show different ecological responses to environmental conditions associated with altitude,even if they do not contain very broad spatial *** results also indicate distinction of photosynthetic acclimation among the two expressions along an altitudinal gradient,reflecting trade-offs among leaf structure and physiological traits.

关键词： Altitude modulation Bivariate relationship Leaf trait Qinling Mountains

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Assessing the cost reduction potential of CCUS cluster projects of coal-fired plants in Guangdong Province in China

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Frontiers of Earth Science 2023年第3期17卷 844-855页

作者： Muxin liu Yueze ZHANG hailin.LAN Feifei HUANG Xi LIANG Changyou XIA School of Business Administration South China University of TechnologyGuangzhou 510640China Research Center of Chinese Corporate Strategic Management South China University of TechnologyGuangzhou 510640China Research Base of Carbon Neutral Finance for Guangdong-Hong Kong-Macao Greater Bay Area Guangzhou 510800China Beijing Institute of Geological Survey Beijing 100195China School of Economics Guangzhou City University of TechnologyGuangzhou 510800China UK-China(Guangdong)CCUS Centre Guangzhou 510440China Bartlett School University College LondonLondon WC1E6BTUK

Carbon capture, utilization, and storage (CCUS) have garnered extensive attention as a target of carbon neutrality in China. The development trend of international CCUS projects indicates that the cluster construction of CCUS projects is the main direction of future development. The cost reduction potential of CCUS cluster projects has become a significant issue for CCUS stakeholders. To assess the cost reduction potential of CCUS cluster projects, we selected three coal-fired power plants in the coastal area of Guangdong as research targets. We initially assessed the costs of building individual CCUS projects for each plant and subsequently designed a CCUS cluster project for these plants. By comparing individual costs and CCUS cluster project costs, we assessed the cost reduction potential of CCUS cluster projects. The results show that the unit emission reduction cost for each plant with a capacity of 300 million tonnes per year is 392.34, 336.09, and 334.92 CNY/tCO_(2). By building CCUS cluster project, it could save 56.43 CNY/tCO_(2) over the average cost of individual projects (354.45 CNY/tCO_(2)) when the total capture capacity is 9 million tonnes per year (by 15.92%). Furthermore, we conducted a simulation for the scenario of a smaller designed capture capacity for each plant. We found that as the capture scale increases, the cost reduction potential is higher in the future.

关键词： cost reduction potential CCUS cluster projects coal-fired plant carbon neutrality

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Simulation Analysis on Mechanical Property Characterization of Carbon Nanotubes Reinforced Epoxy Composites

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Computer Modeling in Engineering & Sciences 2020年第10期125卷 145-171页

作者： Dan Li LiDing Zhengang liu Qiang Li Kaiyun Guo hailin.Cao Shenzhen Academy of Aerospace Technology Shenzhen518057China Shanghai Aerospace Control Technology Institute Shanghai201109China Shanghai Institute of Satellite Engineering Shanghai201109China Harbin Institute of Technology(Shenzhen) Shenzhen518055China

Carbon nanotube(CNT)-reinforced composites have ultra-high elastic moduli,low densities,and fibrous *** paper presents the multi-scale finite element modeling of CNT-reinforced polymer composites from micro-to *** nanocomposites were modeled using representative volume elements(RVEs),and finite element code was written to simulate the modeling and loading procedure and obtain equivalent mechanical properties of the RVEs with various volume fractions of CNTs,which can be used directly in the follow-up simulation studies on the macroscopic model of CNT-reinforced *** using the programming to simulate the deformation and fracture process of the CNT-reinforced epoxy composites,the mechanical parameters and stress-strain curves of the composites on themacro-scale were obtained by endowing the elements of the lattice models withRVE *** experiments of the CNT-reinforced composites were also carried *** validity of the finite element simulation method was verified by comparing the results of the simulations and *** element models of functionally graded CNT-reinforced composites(FG-CNTRC)with different distributions were established,and the tensile and three-point-bending conditions for various graded material models were simulated by the methods of lattice model and birth-death element to obtain the tensile and bending *** addition,the influence of the distribution and volume ratio of the CNTs on the performance of the graded composite material structures was also analyzed.

关键词： Finite element method lattice modeling carbon nanotube mechanical properties gradient composites

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Exceptional strength-ductility synergy of additively manufactured CoCrNi medium-entropy alloy achieved by lattice defects in heterogeneous microstructures

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Journal of Materials Science & Technology 2022年第32期127卷 61-70页

作者： Jianying Wang Jianpeng Zou hailin.Yang Lijun Zhang Zhilin liu Xixi Dong Shouxun Ji State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China Light Alloy Research Institute College of Mechanical and Electrical EngineeringCentral South UniversityChangsha 410083China Brunel Centre for Advanced Solidification Technology(BCAST) Brunel University LondonUxbridgeMiddlesex UB83PHUnited Kingdom

The selective laser melting(SLM)with subsequent cold rolling and annealing is used to produce high-density lattice defects and grain refinement in the CoCrNi medium-entropy alloys(MEAs).The superior comprehensive mechanical properties have been achieved in the as-SLMed CoCrNi alloy after rolling and *** as-SLMed alloys delivered the yield strength of 693.4 MPa,the ultimate tensile strength of 912.7 MPa and the fracture strain of 54.4%.After rolling with 70%reduction in thickness and annealing at 700℃for 2 *** yield strength,ultimate tensile strength and fracture strain reached 1161.6 MPa,1390.8 MPa and 31.5%,*** exceptional strength-ductility synergy is mainly attributed to the refined hierarchical microstructures with coarsening grains at a level of 30μm and ultrafine grains at a level of 1μm,and the heritage of dislocation-formed sub-grains and other lattice *** investigation demonstrates that the SLM with subsequent rolling and annealing is beneficial to fabricate high strength and ductile MEAs with single face-centered cubic(fcc)structure.

关键词： Medium-entropy alloys Selective laser melting Strength-ductility synergy Defects Microstructure

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基于北斗授时数字技术的配电网行波故障隐患识别研究

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微型电脑应用 2024年第10期40卷 109-111,125页

作者：周晓琴金祝飞刘海林国网浙江嘉兴供电公司浙江嘉兴314000

为了提升行波故障识别效果,降低误报率与虚警率,提出一种基于北斗授时数字技术的配电网行波故障隐患识别方法。采集行波故障信号,采用北斗授时数字技术将采集到的信号按照时间顺序进行记录和分析。通过带通滤波器消除其他频率干扰,突出... 详细信息

为了提升行波故障识别效果,降低误报率与虚警率,提出一种基于北斗授时数字技术的配电网行波故障隐患识别方法。采集行波故障信号,采用北斗授时数字技术将采集到的信号按照时间顺序进行记录和分析。通过带通滤波器消除其他频率干扰,突出故障信号的特征。针对行波故障信号数字滤波结果,使用递归神经网络构建故障隐患识别模型,运用该模型实现行波故障隐患识别。实验结果表明,所提方法的误报率与虚警率较低,且能够在噪声状态下获取信号时频特征,实现对多通道信号的准确识别,有利于提高配电系统的可靠性和稳定性。

关键词：北斗授时数字技术配电网行波故障带通滤波器

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Bacteria-assisted delivery and oxygen production of nano-enzyme for potent radioimmunotherapy of cancer

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Nano Research 2022年第8期15卷 7355-7365页

作者： Jing Ni hailin.Zhou Jingyu Gu Xinpei liu Jie Chen Xuan Yi Kai Yang State Key Laboratory of Radiation Medicine and Protection School of Radiation Medicine and Protection&School for Radiological and Interdisciplinary Sciences(RADX)Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education InstitutionsSoochow UniversitySuzhou 215123China School of Pharmacy Jiangsu Key Laboratory of Inflammation and Molecular Drug TargetsNantong UniversityNantong 226001China Dushu Lake Hospital Affiliated to Soochow University Medical Center of Soochow UniversitySuzhou 215123China

Tumor-targeting attenuated Salmonella could induce certain antitumor therapeutic effect through its proliferation characteristic and the consequent activated immune response,while host defense cells represented by neutrophils would trap and eliminate these invading bacteria via producing excess hydrogen peroxide(H_(2)O_(2))-including reactive oxygen species in the bacteriainfected tumor,thereby impairing the efficacy of the bacteria treatment of ***,we attempt to combine bacteria treatment and oxygen-dependent radioimmunotherapy of tumor through injection of neutrophil-targeted nano-catalase into the bacteria-treated mice for perfect tumor treatment *** albumin is used to coat catalase and deliver it to the neutrophils infiltrated in bacteria-infected tumor *** advantage of the generating H_(2)O_(2)by neutrophils,easily-diffused oxygen is produced and spread the whole tumor under the catalysis of nano-enzyme,leading to enhanced radiotherapy of hypoxic tumor ***,the optimized tumor microenvironment,synergistically caused by potent immune-stimulation of bacteria,generating oxygen and tumor radiotherapy,would boost the antitumor *** novel combination therapy strategy holds great promise to provide new ideas for future clinical cancer treatment.

关键词： bacteria neutrophil hydrogen peroxide denatured albumin radiotherapy

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控释掺混肥料一次性基施对热带地区水稻产量及氮肥利用效率的影响

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福建农业学报 2024年第7期39卷 766-774页

作者：杨红竹黄艳艳刘海林林清火茶正早罗微中国热带农业科学院橡胶研究所/中国热带农业科学院土壤肥料研究中心/省部共建国家重点实验室培育基地-海南省热带作物栽培生理学重点实验室海南海口571101 儋州橡胶林土壤环境海南省野外科学观测研究站海南儋州571737

【目的】探究控释掺混肥及减氮处理对热带地区水稻产量及氮肥利用效率的影响,以期促进控释掺混肥料在热带地区水稻栽培中的科学施用及推广应用。【方法】以控释掺混肥料为试验材料,在海南省屯昌县枫木镇和儋州市东成镇开展大田试验,设... 详细信息

【目的】探究控释掺混肥及减氮处理对热带地区水稻产量及氮肥利用效率的影响,以期促进控释掺混肥料在热带地区水稻栽培中的科学施用及推广应用。【方法】以控释掺混肥料为试验材料,在海南省屯昌县枫木镇和儋州市东成镇开展大田试验,设置常规施肥(分3次施肥)、控释掺混肥料一次性基施及其减氮10%和减氮20%处理,测定双季稻产量、氮素吸收及氮肥利用效率。【结果】等氮条件下,控释掺混肥料一次性基施能够促进水稻氮素吸收、干物质累积,提高水稻产量和氮肥利用效率;与常规分次施肥相比,水稻产量提高7.43%~22.84%,地上部干物质累积量提高8.22%~22.39%,氮素累积量提高12.19%~32.06%,氮肥利用率提高31.67%~75.65%,且均差异显著(除东成早稻产量外)。而在减氮10%~20%条件下,控释掺混肥一次性基施也能提高或不显著降低水稻产量、干物质累积量和氮素累积量,对氮肥利用率也具有一定提升效果。【结论】控释掺混肥一次性基施可提高水稻产量及肥料氮肥利用率,减氮10%~20%仍能获得较高产量,是热带地区水稻轻简化施肥和减氮增效的有效途径。

关键词：控释掺混肥料一次性施用水稻热带地区产量

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城固县农产品品牌建设探究

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广东蚕业 2024年第6期58卷 127-129页

作者：刘淑慧黎天宇潘海林西北农林科技大学陕西咸阳712100

推进农产品品牌化建设、提高农产品的附加值和市场竞争力,对推动农村经济转型、产业发展具有重要意义。文章通过对陕西省城固县的实地调查,分析了当地农产品品牌建设存在的问题,提出了相应的策略建议,以期实现城固县农产品品牌的标准化... 详细信息

推进农产品品牌化建设、提高农产品的附加值和市场竞争力,对推动农村经济转型、产业发展具有重要意义。文章通过对陕西省城固县的实地调查,分析了当地农产品品牌建设存在的问题,提出了相应的策略建议,以期实现城固县农产品品牌的标准化、产业化和市场化。

关键词：农产品品牌建设乡村振兴城固县

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松带装置在带式输送机中的应用研究

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煤矿机械 2024年第10期45卷 151-153页

作者：王鹏家刘增杰周海霖宁夏天地西北煤机有限公司宁夏石嘴山753000

针对主斜井带式输送机机头更换和维修滚筒、硫化输送带接头困难等问题,设计了一种智能控制松带装置。该装置通过液压系统,利用机械结构配置伸缩油缸,实现机头输送带与滚筒分离,形成一定作业空间,完成各种任务。介绍了松带装置的结构、... 详细信息

针对主斜井带式输送机机头更换和维修滚筒、硫化输送带接头困难等问题,设计了一种智能控制松带装置。该装置通过液压系统,利用机械结构配置伸缩油缸,实现机头输送带与滚筒分离,形成一定作业空间,完成各种任务。介绍了松带装置的结构、工作原理及其特点。该装置结构稳定、操作方便、安全性能高,能够完全代替人工进行松带操作。

关键词：带式输送机大倾角主斜井松带装置

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Methylation patterns in 5' terminal regions of pluripotency-related genes in bovine in vitro fertilized and cloned embryos

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Journal of Genetics and Genomics 2010年第5期37卷 297-304页

作者： Jie Lan Song Hua hailin.Zhang Yongli Song Jun liu Yong Zhang Key Laboratory of Animal Reproductive Physiology & Embryo Technology Institution of biotechnology College of Veterinary Medicine Northwest A & F University Yangling 712100 China

In order to investigate DNA methylation profiles of five pluripotency-related genes （Oct4, Sox2, Nanog, Rexl and Fgf4） during bovine maternal to zygotic transition （MZT） in both in vitro fertilized （IVF） and nuclear transfer （NT） embryos, sodium bisulfite sequencing method was used to detect DNA methylation levels, accompanied by the statistical analysis of embryo developmental rates. The results showed that Oct4, Nanog, Rexl and Fgf4 were respectively demethylated by 25.22% （P 〈 0.01）, 3.84% （P 〉 0.05）, 31.82% （P 〈 0.01） and 10% （P 〉 0.05） while Sox2 retained unmethylafion during MZT in IVF embryos. By contrast, Oct4 and Rexl respectively underwent demethylation by 23.04% （P 〈 0.01） and 6.02% （P 〉 0.05）, and, reversely, Sox2, Nanog and Fgf4 respectively experienced remethylation by 0.84% （P 〉 0.05）, 5.39% （P 〉 0.05） and 5.46% （P 〉 0.05） during MZT in NT embryos. Interestingly, the CpG 14 site of Sox2 was specifically methylated in both 8-cell and morula NT embryos. In addition, the development of blastocysts between IVF and NT embryos showed no significant difference. DNA methylation analysis showed that only Oct4 and Sox2 underwent the correct methylation reprogramming process, which may be responsible for the development of blastocysts of NT embryos to a certain extent. In conclusion, the five genes respectively experienced demethylation to different extents and incomplete DNA methylation reprogramming during bovine MZT in both IVF and NT embryos, suggesting that they may be used as indicators for bovine embryo developmental competence.

关键词： bovine DNA methylation Fgf4 Nanog Oct4 Rex1 Sox2

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