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Sensitivity analysis of Biome-BGCMuSo for gross and net primary productivity of typical forests in China

Forest Ecosystems 2022年第1期9卷 111-123页

作者： Hongge Ren Li Zhang Min Yan Xin Tian xingbo zheng Key Laboratory of Digital Earth Science Aerospace Information Research InstituteChinese Academy of SciencesBeijing100094China University of Chinese Academy of Sciences Beijing100049China Institute of Forest Resource Information Techniques Chinese Academy of ForestryBeijing100091China Key Laboratory of Forest Ecology and Management Institute of Applied EcologyChinese Academy of SciencesShenyang110016China Research Station of Changbai Mountain Forest Ecosystems Chinese Academy of SciencesAntu133613JilinChina

Background:Process-based models are widely used to simulate forest productivity,but complex parameterization and calibration challenge the application and development of these *** analysis of numerous parameters is an essential step in model calibration and carbon flux ***,parameters are not dependent on each other,and the results of sensitivity analysis usually vary due to different forest types and ***,global and representative sensitivity analysis would provide reliable information for simple ***:To determine the contributions of input parameters to gross primary productivity(GPP)and net primary productivity(NPP),regression analysis and extended Fourier amplitude sensitivity testing(EFAST)were conducted for Biome-BGCMuSo to calculate the sensitivity index of the parameters at four observation sites under climate gradient from ***:Generally,GPP and NPP were highly sensitive to C:Nleaf(C:N of leaves),Wint(canopy water interception coefficient),k(canopy light extinction coefficient),FLNR(fraction of leaf N in Rubisco),MRpern(coefficient of linear relationship between tissue N and maintenance respiration),VPDf(vapor pressure deficit complete conductance reduction),and SLA1(canopy average specific leaf area in phenological phase 1)at all observation *** sensitive parameters occurred at four observation sites within different climate *** and NPP were particularly sensitive to FLNR,SLA1 and Wint,and C:Nleaf in temperate,alpine and subtropical zones,***:The results indicated that sensitivity parameters of China's forest ecosystems change with climate *** found that parameter calibration should be performed according to plant functional type(PFT),and more attention needs to be paid to the differences in climate and *** findings contribute to determining the target parameters in field experiments and model calibration.

关键词： Sensitivity analysis Biome-BGCMuSo Productivity Regression analysis EFAST

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中药熏足联合穴位注射治疗2型糖尿病周围神经病变的效果研究

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糖尿病新世界 2024年第5期27卷 192-194,198页

作者：钟亮玉郑兴波戴英雁王祖郧十堰市郧阳区中医医院内分泌肾病老年病科湖北十堰442500

目的分析中药熏足联合穴位注射治疗2型糖尿病周围神经病变的疗效。方法回顾性选取郧阳区中医医院2022年1月—2023年6月收治的2型糖尿病周围神经病变的254例患者的临床资料,按照不同治疗方法分为对照组和观察组,各127例。对照组患者采用... 详细信息

目的分析中药熏足联合穴位注射治疗2型糖尿病周围神经病变的疗效。方法回顾性选取郧阳区中医医院2022年1月—2023年6月收治的2型糖尿病周围神经病变的254例患者的临床资料,按照不同治疗方法分为对照组和观察组,各127例。对照组患者采用常规治疗,观察组采用中药熏足联合穴位注射治疗,对比两组患者治疗前后肌电图检查结果(腓神经、胫神经的传导速度)、中医证候积分和多伦多(Toronto)积分。结果治疗前,两组患者的肌电图检查结果比较,差异无统计学意义(P均>0.05);治疗后,观察组患者的腓神经、胫神经的传导速度比对照组更快,差异有统计学意义(P均0.05);治疗后,观察组患者的中医证候积分和Toronto积分明显低于对照组,差异有统计学意义(P均<0.05)。结论治疗2型糖尿病周围神经病变患者选择中药熏足联合穴位注射治疗对优化患者神经传导速度,降低症状评分有更好的治疗效果。

关键词：中药熏足穴位注射 2型糖尿病周围神经病变

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当归四逆汤合抵挡汤加减对糖尿病周围神经病变患者中医证候积分的影响分析

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糖尿病新世界 2024年第10期27卷 161-164页

作者：郑兴波潘毅钟亮玉戴英雁王祖郧十堰市郧阳区中医医院内分泌科湖北十堰442500

目的分析当归四逆汤合抵挡汤加减对糖尿病周围神经病变患者的治疗价值。方法回顾性选取2021年6月—2023年2月郧阳区中医医院收治的120例糖尿病周围神经病变患者的临床资料,以不同治疗方式分为研究组(甲钴胺片+当归四逆汤合抵挡汤加减治... 详细信息

目的分析当归四逆汤合抵挡汤加减对糖尿病周围神经病变患者的治疗价值。方法回顾性选取2021年6月—2023年2月郧阳区中医医院收治的120例糖尿病周围神经病变患者的临床资料,以不同治疗方式分为研究组(甲钴胺片+当归四逆汤合抵挡汤加减治疗)和对照组(甲钴胺片治疗),各60例。对比两组疗效、中医证候积分(肢体麻木不仁、肢末冷痛、倦怠乏力、气短懒言、腰膝酸软、四肢发凉)和多伦多临床评分系统评分及运动神经(腓总神经、正中神经、胫神经)传导速度。结果研究组治疗总有效率高于对照组,差异有统计学意义(P<0.05)。研究组的腓总、正中及胫神经运动传导速度均明显高于对照组,差异有统计学意义(P均<0.05)。研究组各项中医证候积分均低于对照组,差异有统计学意义(P均<0.05)。研究组的多伦多临床评分系统得分明显低于对照组,差异有统计学意义(P<0.05)。结论当归四逆汤合抵挡汤加减治疗,可减轻糖尿病周围神经病变患者症状负担,提高临床疗效,改善病情。

关键词：当归四逆汤抵挡汤糖尿病周围神经病变疗效

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Predicting plant-soil N cycling and soil N_(2)O emissions in a Chinese old-growth temperate forest under global changes:uncertainty and implications

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Soil Ecology Letters 2020年第1期2卷 73-82页

作者： Weiwei Dai Edith Bai Wei Li Ping Jiang Guanhua Dai xingbo zheng CAS Key Laboratory of Forest Ecology and Management Institute of Applied EcologyChinese Academy of SciencesShenyang 110016China College of Land Resource and Environment Jiangxi Agricultural UniversityNanchang 330045China Key laboratory of Poyang Lake Watershed Agricultural Resources and Ecology of Jiangxi Province Nanchang 330045China School of Geographical Sciences Northeast Normal UniversityChangchun 130024China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China Research Station of Changbai Mountain Forest Ecosystems Chinese Academy of SciencesErdaobaihe 133600China

Soil-emitted N_(2)O contributes to two-thirds of global N_(2)O emissions,and is sensitive to global *** used DayCent model to simulate major plant-soil N cycling processes under different global change scenarios in a typical temperate mixed forest in north-eastern *** scenarios included warming(T),elevated atmospheric CO_(2) concentration([CO_(2)])(C),increased N deposition(N)and precipitation(P),and their full factorial *** responses of plant-soil nitrogen cycling processes including net N mineralization,plant N uptake,gross nitrification,denitrification and soil N_(2)O emission were *** increase of elevated[CO_(2)]and N deposition displayed most strong interactive effects on most *** the results from experimental studies for evaluation,simulation uncertainty was highest under elevated[CO_(2)]and increased precipitation among the four global change factors.N deposition had a fundamental impact on soil N cycle and N_(2)O emission in our studied *** forest soil acting as a N sink for added N,scenarios which included increased N deposition showed higher cumulative soil N_(2)O emissions(summed up from 2001 to 2100).In particular,the scenario which included T,P,and N had the largest cumulative soil N_(2)O emission,which was a 24.4% increase over that under ambient *** study points to the importance of the interactive effects of global change factors on plant-soil N cycling and the necessity of multi-factor manipulation experiments.

关键词： Global change DayCent Denitrification Nitrification Soil N_(2)O emission Temperate forest

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Assessment of runoff changes in the sub-basin of the upper reaches of the Yangtze River basin, China based on multiple methods

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Journal of Arid Land 2024年第4期16卷 461-482页

作者： WANG xingbo ZHANG Shuanghu TIAN Yiman Department of Water Resources China Institute of Water Resources and Hydropower ResearchBeijing 100038China College of Hydrology and Water Resources Hohai UniversityNanjing 210098China

Quantitative assessment of the impact of climate variability and human activities on runoff plays a pivotal role in water resource management and maintaining ecosystem *** study considered six sub-basins in the upper reaches of the Yangtze River basin,China,to reveal the trend of the runoff evolution and clarify the driving factors of the changes during 1956–*** regression,Mann-Kendall test,and sliding t-test were used to study the trend of the hydrometeorological elements,while cumulative distance level and ordered clustering methods were applied to identify mutation *** contributions of climate change and human disturbance to runoff changes were quantitatively assessed using three methods,i.e.,the rainfall-runoff relationship method,slope variation method,and variable infiltration capacity(Budyko)hypothesis ***,the availability and stability of the three methods were *** results showed that the runoff in the upper reaches of the Yangtze River basin exhibited a decreasing trend from 1956 to 2020,with an abrupt change in *** attribution analysis,the runoff series could be divided into two phases,i.e.,1961–1985(baseline period)and 1986–2020(changing period);and it was found that the rainfall-runoff relationship method with precipitation as the representative of climate factors had limited usability compared with the other two methods,while the slope variation and Budyko hypothesis methods had highly consistent *** factors showed different effects in the sub-basins of the upper reaches of the Yangtze River ***,human disturbance was the main factor that contributed to the runoff changes,accounting for 53.0%–82.0%;and the contribution of climate factors to the runoff change was 17.0%–47.0%,making it the secondary factor,in which precipitation was the most representative climate *** results provide insights into how climate and anthropogenic changes synergistically influence the runoff of t

关键词： economic belt runoff change influencing assessment climate human activities

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Anti-explosion performance and dynamic response of an innovative multi-layer composite explosion containment vessel

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Defence Technology（防务技术） 2024年第6期36卷 105-121页

作者： Zhen Wang Heng Chen Qi Yuan Wenbin Gu xingbo Xie Hongwei Li College of Field Engineering Army Engineering University of PLANanjing 210007China College of Civil Engineering and Architecture Southwest University of Science and TechnologySichuanMianyang 621010China

An innovative multi-layer composite explosion containment vessel(CECV)utilizing a sliding steel platealuminum honeycomb-fiber cloth sandwich is put forward to improve the anti-explosion capacity of a conventional single-layer explosion containment vessel(SECV).Firstly,a series of experiments and finite element(FE)simulations of internal explosions are implemented to understand the basic anti-explosion characteristics of a SECV and the rationality of the computational models and methods is verified by the comparison between the experimental results and simulation *** on this,the CECV is designed in detail and a variety of FE simulations are carried out to investigate effects of the sandwich structure,the explosive quantity and the laying mode of the fiber cloth on anti-explosion performance and dynamic response of the CECV under internal *** results indicate that the end cover is the critical position for both the SECV and *** maximum pressure of the explosion shock wave and the maximum strain of the CECV can be extremely declined compared to those of the *** a result,the explosive quantity the CECV can sustain is up to 20 times of that the SECV can ***,as the explosive quantity increases,the internal pressure of the CECV keeps growing and the plastic deformation and failure of the sandwich structure become more and more severe,yielding plastic strain of the CECV in addition to elastic *** results also reveal that the laying angles of the fiber cloth's five layers have an impact on the anti-explosion performance of the *** example,the CECV with fiber cloth layered in 0°/45°/90°/45°/0°mode has the optimal anti-capacity,compared to 0°/0°/0°/0°/0°and 0°/30°/60°/30°/0°***,owing to remarkable anti-explosion capacity,this CECV can be regarded as a promising candidate for explosion resistance.

关键词： Explosive container Honeycomb-fiber cloth Anti-explosion Aluminum honeycomb core Composite

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Stability analysis of tunnel face reinforced with face bolts

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Journal of Mountain Science 2024年第7期21卷 2445-2461页

作者： TIAN Chongming JIANG Yin YE Fei OUYANG Aohui HAN xingbo SONG Guifeng School of Highway Chang’an UniversityXi’an 710064China Civil Structural&Environmental EngineeringUniversity College CorkCork T12 YF78Ireland Yunnan Laman Expressway Co.Ltd. Xishuangbanna 666300China

Face bolting has been widely utilized to enhance the stability of tunnel face,particularly in soft soil ***,the influence of bolt reinforcement and its layout on tunnel face stability has not been systematically *** on the theory of linear elastic mechanics,this study delved into the specific mechanisms of bolt reinforcement on the tunnel face in both horizontal and vertical *** also identified the primary failure types of ***,a design approach for tunnel face bolts that incorporates spatial layout was established using the limit equilibrium method to enhance the conventional wedge-prism *** proposed model was subsequently validated through various means,and the specific influence of relevant bolt design parameters on tunnel face stability was ***,design principles for tunnel face bolts under different geological conditions were *** findings indicate that bolt failure can be categorized into three stages:tensile failure,pullout failure,and comprehensive *** cohesion,internal friction angle,bolt density,and overlap length can effectively enhance tunnel face *** to significant variations in stratum conditions,tailored design approaches based on specific failure stages are necessary for bolt design.

关键词： Highway tunnels Tunnel face Face bolts Limit equilibrium method Slice method

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Mechanical responses of underground carriageway structures due to construction of metro tunnels beneath the existing structure:A case study

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Deep Underground Science and Engineering 2024年第2期3卷 231-246页

作者： Xin Han Fei Ye xingbo Han Chao Ren Jing Song Ruliang Zhao School of Highway Chang'an UniversityXi'anChina Shandong Province Transportation Planning and Design Institute JinanChina China Water Resources Beifang Investigation Design and Research Co.Ltd.TianjinChina

To understand the mechanical response pattern of the existing structure and ground due to the construction of metro tunnels underneath,the finite difference method is adopted to study the torsional deformation and stress variation of the existing structure and the effect of underground carriageway structures on the surface *** curves of the maximum differential subsidence,torsion angle,and distortion of the cross-section of the existing structure show two peaks in succession during traversing of two metro tunnels beneath *** torsion angle of the existing structure changes when the two tunnels traverse beneath it in opposite *** first traversing of the shield tunnel mainly induces the magnitude variation in torsional deformation of the existing structure,but the second traversing of the subsurface tunnel may cause a dynamic change in the magnitude and form of torsional deformation in the existing *** shielding effect can reduce the surface subsidence caused by metro tunnel excavation to a certain extent,and the development trend of subsidence becomes slower as the excavation continues.

关键词： metro tunnel numerical simulation structural deformation surface subsidence underground carriageway structure

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添加硫和锰对长白山森林土壤与腐殖质顽固性有机碳矿化的影响

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林业科学 2020年第8期56卷 11-19页

作者：王玉哲张凤丽郑兴波韩士杰郑俊强福建农林大学林学院福州350002 中国科学院森林生态与管理重点实验室中国科学院沈阳应用生态研究所沈阳110016 河南大学生命科学学院开封475004

【目的】探究硫和锰添加对长白山森林土壤和腐殖质顽固性有机碳的矿化速率及其温度敏感性(Q10)的影响,为评估长白山森林碳元素的生物地球化学循环对大气硫输入的响应提供科学依据。【方法】采集长白山阔叶红松林、杨桦林和高山苔原土壤... 详细信息

【目的】探究硫和锰添加对长白山森林土壤和腐殖质顽固性有机碳的矿化速率及其温度敏感性(Q10)的影响,为评估长白山森林碳元素的生物地球化学循环对大气硫输入的响应提供科学依据。【方法】采集长白山阔叶红松林、杨桦林和高山苔原土壤以及阔叶红松林和杨桦林腐殖质样品,进行室内培养试验。首先将样品置于25℃预培养90天,以移除易分解的活性碳组分,之后分别加入2 mL MnCl2、NaCl、MnSO4和Na2SO4溶液(Mn添加量为3 mg·g^-1有机碳),对照处理加入等体积的双蒸水,分别置于25和35℃下培养30天,于第1、3、6、10、15、21和30天测定释放的CO2量,并计算顽固性有机碳矿化速率、累积矿化量和有机碳矿化的温度敏感性(Q10)。在培养结束时(第30天),采用磷脂脂肪酸生物标记(PLFA)法测定土壤和腐殖质样品的磷脂脂肪酸总量。【结果】在MnCl2和NaCl处理间及在MnSO4和Na2SO4处理间,土壤和腐殖质的顽固性有机碳矿化速率、累积矿化量和Q10无显著差异(P>0.05);腐殖质的顽固性有机碳矿化速率在4种处理之间无显著差异;土壤顽固性有机碳矿化速率在MnSO4处理下得到提高(P<0.05),而MnCl2处理对其无显著影响;添加可MnSO4和Na2SO4显著提高3种土壤和杨桦林腐殖质顽固性有机碳累积矿化量(P<0.05),而添加MnCl2和NaCl处理则无显著影响,表明供试土壤和腐殖质有机碳矿化受到硫添加的影响,而不是锰添加;添加硫和锰可显著降低阔叶红松林土壤顽固性有机碳矿化速率Q10(P<0.05),而对杨桦林和高山苔原土壤无显著影响;阔叶红松林和杨桦林腐殖质的微生物总量在MnSO4处理下显著提高(P<0.05),而MnCl2处理对其无显著影响;MnSO4添加可提高土壤的微生物总量,特别是高山苔原土壤显著高于对照(P<0.05)。【结论】硫添加可显著提高长白山森林土壤的顽固性有机碳矿化速率和累积矿化量,而锰添加则无显著影响。考虑到硫对土壤有机碳矿化的重要性,今后建立土壤有机碳矿化模型时应将硫输入作为一个重要参数。

关键词：锰添加硫添加顽固性碳分解温度敏感性

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碳同位素技术在森林生态系统碳循环研究中的应用

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生态学杂志 2005年第11期24卷 1334-1338页

作者：郑兴波张岩顾广虹东北林业大学哈尔滨150040 中国科学院应用生态研究所沈阳110016 吉林省长白山国家级自然保护区管理局延边133613

碳同位素技术对碳素在生态系统中的迁移动态具有很好的示踪作用,在生态学各领域研究中应用广泛。土壤、大气、植物是森林生态系统的重要碳库,植物是大气和土壤交换碳元素的重要介质。本文简要总结了碳同位素技术在研究碳元素在植物体内... 详细信息

碳同位素技术对碳素在生态系统中的迁移动态具有很好的示踪作用,在生态学各领域研究中应用广泛。土壤、大气、植物是森林生态系统的重要碳库,植物是大气和土壤交换碳元素的重要介质。本文简要总结了碳同位素技术在研究碳元素在植物体内以及植物、土壤、大气碳库之间的迁移规律和生态学过程中的应用,展望了该技术在森林界面学中的应用前景。

关键词：碳同位素技术森林生态系统碳迁移规律

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