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Aboveground carbon sequestration of Cunninghamia lanceolata forests:Magnitude and drivers

Forest Ecosystems 2024年第1期11卷 32-41页

作者： Chen Wang Shuguang Liu Yu zhu Andrew R.Smith Ying Ning deming Deng National Engineering Laboratory for Applied Technology of Forestry&Ecology in South China Central South University of Forestry and TechnologyChangsha 410004China Technology Innovation Center for Ecological Conservation and Restoration in Dongting Lake Basin Ministry of Natural ResourcesChangsha 410007China College of Life Science and Technology Central South University of Forestry and TechnologyChangsha 410004China School of Ecology and Environment Hainan UniversityHaikou 570228China School of Natural Sciences Bangor UniversityGwyneddLL572UWUK College of Forestry Central South University of Forestry and TechnologyChangsha 410004China Hunan Prospecting Designing&Research General Institute for Agriculture Forestry&IndustryChangsha 410007China

Understanding the spatial variation,temporal changes,and their underlying driving forces of carbon sequestration in various forests is of great importance for understanding the carbon cycle and carbon management *** carbon density and sequestration in various Cunninghamia lanceolata forests,extensively cultivated for timber production in subtropical China,vary with biodiversity,forest structure,environment,and cultural factors remain poorly explored,presenting a critical knowledge gap for realizing carbon sequestration supply potential through *** on a large-scale database of 449 permanent forest inventory plots,we quantified the spatial-temporal heterogeneity of aboveground carbon densities and carbon accumulation rates in Cunninghamia lanceolate forests in Hunan Province,China,and attributed the contributions of stand structure,environmental,and management factors to the heterogeneity using quantile age-sequence analysis,partial least squares path modeling(PLS-PM),and hot-spot *** results showed lower values of carbon density and sequestration on average,in comparison with other forests in the same climate zone(i.e.,subtropics),with pronounced spatial and temporal ***,quantile regression analysis using carbon accumulation rates along an age sequence showed large differences in carbon sequestration rates among underperformed and outperformed forests(0.50 and 1.80 Mg·ha^(-1)·yr^(-1)).PLS-PM demonstrated that maximum DBH and stand density were the main crucial drivers of aboveground carbon density from young to mature ***,species diversity and geotopographic factors were the significant factors causing the large discrepancy in aboveground carbon density change between low-and high-carbon-bearing *** analysis revealed the importance of culture attributes in shaping the geospatial patterns of carbon *** work highlighted that retaining largesized DBH trees and increasing shade-t

关键词： Carbon density Carbon accumulation rate Forest age Spatial variation Cultural influence

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Problems in Homoclinic Bifurcation with Higher Dimensions

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Acta Mathematica Sinica,English Series 1998年第3期14卷 341-352页

作者： zhu deming Department of Mathematics, East China Normal University. Shanghai 200062. China Department of Mathematics East China Normal University 200062 Shanghai China

In this paper, a suitable local coordinate system is constructed by using exponential dichotomies and generalizing the Floquet method from periodic systems to nonperiodic systems. Then the Poincare map is established to solve various problems in homoclinic bifurcations with codimension one or two. Bifurcation diagrams and bifurcation curves are given.

关键词： Exponential dichotomy Local coordinates Homoclinic bifurcation Periodic orbit

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高速公路生态环境保护基础设施建设示范与经验——以建兴高速生物多样性(鸟类)观测站为例

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环境监控与预警 2024年第5期16卷 37-41页

作者：薛岭邓飞宇袁哲陆凯朱德明殷宝生江苏省交通工程建设局江苏南京210004 江苏环保产业技术研究院股份公司江苏南京210019 江苏省生态环境厅江苏南京210036

高速公路作为关系民生福祉的基础设施,具有促进经济发展、加快区域发展等重要意义,但由于其分割生境、产生噪声等因素,高速公路基础设施的快速发展对沿线生态系统和生物多样性保护带来不利影响,有必要建立生物多样性观测站进行观测评估... 详细信息

高速公路作为关系民生福祉的基础设施,具有促进经济发展、加快区域发展等重要意义,但由于其分割生境、产生噪声等因素,高速公路基础设施的快速发展对沿线生态系统和生物多样性保护带来不利影响,有必要建立生物多样性观测站进行观测评估,科学指导生态保护和管理。建兴高速生物多样性(鸟类)观测站是整合多方力量建成的多样性观测站。探讨了观测站各设计阶段,观测站点的选择原则和空间定位方法,并对观测区域进行了生态系统类型聚类分析。截至2024年5月底,观测站已记录兴化里下河湿地鸟类51种、63万余只(次)。初步分析结果表明,人为干扰低的站点鸟类多样性程度最高。根据该观测站建设实际,提出生物多样性观测站建设因地制宜、长期运营、深化科研、公众参与等4个方面的经验。

关键词：高速公路生物多样性观测站建设经验鸟类

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Exosome-transported circHDAC1_004 Promotes Proliferation, Migration, and Angiogenesis of Hepatocellular Carcinoma by the miR-361-3p/NACC1 Axis

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Journal of Clinical and Translational Hepatology 2023年第5期11卷 1079-1093页

作者： Bin Xu Wenbo Jia Yanzhi Feng Jinyi Wang Jing Wang deming zhu Chao Xu Litao Liang Wenzhou Ding Yongping Zhou Lianbao Kong Hepatobiliary Center The First Affiliated Hospital of Nanjing Medical UniversityNanjingJiangsuChina Key Laboratory of Liver Transplantation Chinese Academy of Medical SciencesNational Health Commission Key Laboratory of Living Donor Liver Transplantation(Nanjing Medical University)NanjingJiangsuChina Jiangsu Provincial Medical Innovation Center NanjingJiangsuChina Jiangsu Provincial Medical Key Laboratory NanjingJiangsuChina Department of health Affiliated Hospital of StomatologyNanjing Medical UniversityNanjingJiangsuChina Jiangnan University Medical Center JUMCDepartment of HepatobiliaryWuxiJiangsuChina

Background and Aims:Hepatocellular carcinoma(HCC)is among the most common malignant tumors *** RNAs(circRNAs),as a type of noncoding RNAs,reportedly participate in various tumor biological ***,the role of circHDAC1_004 in HCC remains ***,we aimed to explore the role and the underlying mechanisms of circHDAC1_004 in the development and progression of ***:Quantitative real-time polymerase chain reaction(qRT-PCR)was used to detect circHDAC1_004 expression(circ_0005339)in *** sequencing and agarose gel electrophoresis were used to determine the structure of circHDAC1_*** vitro and in vivo experiments were used to determine the biological function of circHDAC1_004 in ***,qRT-PCR,RNA immunoprecipitation,western blotting,and a luciferase reporter assay were used to explore the relationships among circHDAC1_004,miR-361-3p,and ***:circHDAC1_004 was upregulated in HCC and significantly associated with poor overall ***1_004 promoted HCC cell proliferation,stemness,migration,and *** addition,circHDAC1_004 upregulated human umbilical vein endothelial cells(HUVECs)and promoted angiogenesis through ***1_004 promoted NACC1 expression and stimulated the epithelialmesenchymal transition pathway by sponging ***:We found that circHDAC1_004 overexpression enhanced the proliferation,stemness,and metastasis of HCC via the miR-361-3p/NACC1 axis and promoted HCC angiogenesis through *** findings may help develop a possible therapeutic strategy for HCC.

关键词： circHDAC1_004 Exosome Angiogenesis Hepatocellular carcinoma Stemness Epithelial-mesenchymal transformation

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江苏两栖脊椎(蛙类)物种保护的问题和对策建议

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环境监控与预警 2024年第5期16卷 33-36页

作者：王宁婧朱德明孙兆海辛玉婷霍宵霄冯淑怡西英格兰大学英国布里斯托BS161QY 江苏省生态环境厅江苏南京210036 江苏省环境工程技术有限公司江苏南京210019 南京农业大学中国资源环境与发展研究院江苏南京210095

生物多样性保护是“强富美高”新江苏建设的重要内容。近几十年来,受城镇化、工业化的快速发展,以及农用化学品的广泛使用等因素影响,江苏境内适宜蛙类生存的栖息地面积明显缩小,无斑雨蛙等我国特有蛙类物种数量明显下降,前景令人担忧... 详细信息

生物多样性保护是“强富美高”新江苏建设的重要内容。近几十年来,受城镇化、工业化的快速发展,以及农用化学品的广泛使用等因素影响,江苏境内适宜蛙类生存的栖息地面积明显缩小,无斑雨蛙等我国特有蛙类物种数量明显下降,前景令人担忧。针对目前蛙类物种保护中存在的问题,建议从社会公众教育,物种本底调查,样地监测观测,科学研究投入等方面采取强有力的措施,切实扭转蛙类物种种群数量减少的不利局面。

关键词：两栖物种蛙类生物多样性监测物种保护江苏

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THE TOPOLOGICAL AND DYNAMICAL PROPERTIES OF NONORIENTABLE SURFACES

引用

Chinese Annals of Mathematics 1988年第2期9卷 197-206页

作者：朱德明 Department of Mathematics East China Normal University Shanghai China.

Four topological and dynamical properties of nonorientable surfaces are *** is that for every continuous flow defined on any nonorientable closed surface,thereexist periodic or singular closed *** the case of the projective plane,it confirms aconjecture of professor Ye Yian-qian in his lecture notes“dynamical systems on surfaces”.Secondly,the author gives an exact upper bound of the number of closed curves onnonorientable surfaces,which do not intersect each other and the complement of their sumis still *** third is concerned with the upper and lower bound of the number ofthe periodic or singular closed orbits with certain *** last is related to theconnectedness of the complement of a lifting curve on two-fold covering *** firstproperty may be considered as a generalization of Kneser theorem from Klein bottle togeneral nonorientable surfaces and the second as a generalization of[4]Theorem 9.3.6from orientable surfaces to nonorientable surfaces.

关键词： Th THE TOPOLOGICAL AND DYNAMICAL PROPERTIES OF NONORIENTABLE SURFACES PCO

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SADDLE VALUES AND INTEGRABILITY CONDITIONS OF QUADRATIC DIFFERENTIAL SYSTEMS

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Chinese Annals of Mathematics 1987年第4期8卷 466-478页

作者：朱德明 Department of Mathematics East China Normal University Shanghai China.

In the first section of the paper,the first three saddle values R1,R2,R3 of the realquadratic differential system（QDE） are computed by use of the method with which Poincaréresearchs on Hopf *** the second section,by applying the method and results ofDulac seeking integrability conditions of QDE it is proved that the system is integrable ifand only if R1=R2=R3=0,and it is also true when the system is *** integrabilityconditions given here can be applied much more easily then Dulac’*** the last part ofthe paper,it is pointed out that iR1,iR2,iR3 are the first three focal values of the weakfocus of the complex *** the formulae of R1,R2,R3 and the result in section 2,one can easily give the formulae of the focal values for the real QDE with Bautin formand give a new proof of Bautin’s famous result.

关键词：鲁一 Za SADDLE VALUES AND INTEGRABILITY CONDITIONS OF QUADRATIC DIFFERENTIAL SYSTEMS

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Variation and source of atmospheric phosphine in the coastal Antarctica

引用

Chinese Journal Of Geochemistry 2006年第B8期25卷 203-204页

作者： Renbin zhu deming KONG Liguang SUN Institute of Polar Environment University of Science and Technology of China Hefei 230026 China

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MELNIKOV VECTOR WITH HIGHER ORDER

引用

Annals of Differential Equations 1996年第3期12卷 371-379页

作者： zhu deming(East China Normal University,200062) East China Normal University 200062

By using the geometrical method, the higher order Melnikov vector and the associatedcriteria for the persistence, transversality and tangency of homoclinic and heteroclinic orbits are established. Examples of applicat... 详细信息

关键词： invariant manifold,tangent space heteroclinic orbit transversality exponential dichotomy.

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离散Halbach永磁电动机气隙磁通密度特点及其空载电动势波形优化

引用

电工技术学报 2008年第11期23卷 22-27页

作者：朱德明严仰光南京航空航天大学航空电源航空科技重点实验室南京210016

利用离散Halbach阵列气隙磁通密度分布特点,合理选择电动机转子结构参数,对发挥永磁体潜力至关重要。文中采用电磁场有限元数值计算方法,揭示离散Halbach阵列气隙磁通密度的谐波和基波与每极磁体数、磁体厚度以及极对数之间的变化规律... 详细信息

利用离散Halbach阵列气隙磁通密度分布特点,合理选择电动机转子结构参数,对发挥永磁体潜力至关重要。文中采用电磁场有限元数值计算方法,揭示离散Halbach阵列气隙磁通密度的谐波和基波与每极磁体数、磁体厚度以及极对数之间的变化规律。并以此为依据设计样机一台,实验结果验证了有限元模型的正确性。同时进一步以样机的结构参数为基础,对反电动势进行优化,提出一种削弱集中非叠绕组结构空载电动势谐波的方法,为离散Halbach阵列集中非叠绕组电机设计提供参考。

关键词：离散Halbach阵列气隙磁通密度集中非叠绕组空载电动势

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