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长三角城市群城市洪涝韧性与生态系统服务的耦合协调关系

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生态学报 2024年第7期44卷 2772-2785页

作者：嵇娟陈军飞丁童慧李远航河海大学商学院南京211106 长江保护与绿色发展研究院南京210098 江苏长江保护与高质量发展研究基地南京210098

厘清城市洪涝韧性与生态系统服务之间耦合协调关系,可为城市防洪减灾和生态文明建设提供重要决策参考。综合运用基于麻雀算法的投影寻踪模型、InVEST模型和耦合协调度模型,在分析2000—2020年长三角城市群的城市洪涝韧性与水源涵养、水... 详细信息

厘清城市洪涝韧性与生态系统服务之间耦合协调关系,可为城市防洪减灾和生态文明建设提供重要决策参考。综合运用基于麻雀算法的投影寻踪模型、InVEST模型和耦合协调度模型,在分析2000—2020年长三角城市群的城市洪涝韧性与水源涵养、水质净化、土壤保持和气候调节四种生态系统服务时空格局基础上,尝试探索两者耦合协调关系及其时空演变特征。研究发现:(1)长三角城市群的城市洪涝韧性水平呈现“N”型增加趋势,并呈现“上海>江苏>浙江>安徽”的空间格局,表明经济水平越高的城市展现出更强的洪涝韧性,经济是影响城市洪涝韧性波动的主要因素,而自然韧性成为城市洪涝韧性提升的关键短板;(2)生态系统服务存在显著的空间异质性,高植被覆盖的南部地区提供了更高的生态系统服务,从时间维度看其空间分布是稳定的,水源涵养和水质净化服务总体呈向好趋势,土壤保持服务整体呈现倒“N”型增加,气候调节服务呈现微弱的下降趋势;(3)城市洪涝韧性与生态系统服务的耦合协调度在研究期内较为稳定,且与生态系统服务的时空变化趋于一致,呈现“南高北低、由西南向东北逐渐减弱”的趋势,生态系统服务较高的城市,表现出更好的耦合协调性,且随着生态系统服务的增加而改善。因此,长三角城市群有必要从提高生态系统服务功能的角度出发,因地制宜、分类施策,促进城市洪涝韧性与生态系统服务的协调发展。

关键词：城市洪涝韧性生态系统服务耦合协调度长三角城市群

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Ⅰ型人免疫缺陷病毒调控蛋白顺式转录激活因子的功能及其与疾病的相关性

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中国生物制品学杂志 2024年第2期37卷 227-233页

作者：李远航陈睿鑫(综述) 杜娟(审校) 吉林大学白求恩第一医院转化医学研究院艾滋病与病毒研究所吉林长春130021

获得性免疫缺陷综合征(acquired immune deficiency syndrome,AIDS),又称艾滋病,一直是全球范围内公共卫生关注的重大传染病之一。Ⅰ型人免疫缺陷病毒(human immunodeficiency virus type 1,HIV-1)是导致AIDS的病原体,即使目前广泛采用... 详细信息

获得性免疫缺陷综合征(acquired immune deficiency syndrome,AIDS),又称艾滋病,一直是全球范围内公共卫生关注的重大传染病之一。Ⅰ型人免疫缺陷病毒(human immunodeficiency virus type 1,HIV-1)是导致AIDS的病原体,即使目前广泛采用的高效抗逆转录病毒疗法(鸡尾酒疗法)可有效抑制HIV-1的感染和复制,感染者依然会罹患其他疾病,如HIV-1相关的神经认知紊乱症(HIV-associated neurocognitive disorder,HAND)。本文主要探讨HIV-1中重要的调控蛋白顺式转录激活因子(trans-activator of transcription,Tat)的功能,以及其与HIV-1复制及HAND的相关性,以明确研发靶向Tat蛋白的抗AIDS药物的重要性。

关键词：顺式转录激活因子 Ⅰ型人免疫缺陷病毒神经认知紊乱症获得性免疫缺陷综合征

Response of soil respiration to environmental and photosynthetic factors in different subalpine forest-cover types in a loess alpine hilly region

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Journal of Forestry Research 2022年第2期33卷 653-665页

作者： yuanhang li Sha lin Qi Chen Xinyao Ma Shuaijun Wang Kangning He School of Soil and Water Conservation Key Laboratory of State Forestry Administration On Soil and Water ConservationBeijing Forestry UniversityBeijing 100083People’s Republic of China Beijing Engineering Research Center of Soil and Water Conservation Beijing Forestry UniversityBeijing 100083People’s Republic of China Engineering Research Center of Forestry Ecological Engineering Ministry of EducationBeijing Forestry UniversityBeijing 100083People’s Republic of China North China Power Engineering Co. Ltd.of China Power Engineering Consulting GroupChangchun 130021People’s Republic of China Power China Huadong Engineering Corporation limited Hangzhou 311122People’s Republic of China

Soil respiration(Rs)is important for transport-ing or fixing carbon dioxide from the atmosphere,and even diminutive variations can profoundly influence the carbon ***,the R_(s) dynamics in a loess alpine hilly region with representative sensitivity to climate change and fragile ecology remains poorly *** study investigated the correlation and degree of control between R_(s) and its photosynthetic and environmental factors in five subalpine forest cover *** examined the correlations between R_(s) and variables temperature(T_(10)) and soil moisture content at 10 cm depth(W_(10)),net photosynthetic rate(P_(n))and soil properties to establish multiple models,and the variables were measured for diurnal and monthly vari-ations from September 2018 to August *** results showed that soil physical factors are not the main drivers of R_(s) dynamics at the diel scale;however,the trend in the monthly variation in R_(s) was consistent with that of T_(10)and P_(n).Further,R_(s) was significantly affected by pH,providing further evidence that coniferous forest leaves contribute to soil acidification,thus reducing R_(s).Significant exponential and linear correlations were established between R_(s) and T_(10)and W_(10),respectively,and R_(s) was positively correlated with P_(n).Accordingly,we established a two-factor model and a three-factor model,and the correlation coefficients(R_(2))was improved to different degrees compared with models based only on T_(10) and W_(10).Moreover,temperature sensitivity(Q_(10))was the highest in the secondary forest and lowest in the Larix principis-rupprechtii *** findings suggest that the control of R_(s) by the environment(moisture and tempera-ture)and photosynthesis,which are interactive or comple-mentary effects,may influence spatial and temporal homeo-stasis in the region and showed that the models appropriately described the dynamic variation in R_(s) and the carbon cycle in different forest *** add

关键词： Loess alpine hilly region Soil respiration Environmental factor Photosynthesis factor Q_(10) Two-factor model Three-factor model

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汽车空调涡旋压缩机排气孔优化研究

制冷与空调 2024年第3期24卷 83-88页

作者：刘兴旺李远航刘晓明李登辉蒋强强陈荣道兰州理工大学压缩机技术国家重点实验室压缩机技术安徽省实验室

针对汽车空调涡旋压缩机排气孔处气体流动变化产生的流动损失问题,对排气孔结构进行优化,以期降低流动损失并提高排气压力。通过三维动网格模型对不同排气孔结构的涡旋压缩机排气过程进行瞬态仿真,发现腰果形排气孔更大的截面积使其拥... 详细信息

针对汽车空调涡旋压缩机排气孔处气体流动变化产生的流动损失问题,对排气孔结构进行优化,以期降低流动损失并提高排气压力。通过三维动网格模型对不同排气孔结构的涡旋压缩机排气过程进行瞬态仿真,发现腰果形排气孔更大的截面积使其拥有更好的开启特性,可有效降低排气损失,提高排气稳定性。在对腰果形排气孔采取进一步扩压式优化后,发现其可以更加有效地降低排气速度并提高排气压力。

关键词：汽车空调涡旋压缩机动网格排气孔结构优化排气特性流动损失

Analysis of China’s PM_(2.5)and ozone coordinated control strategy based on the observation data from 2015 to 2020

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Journal of Environmental Sciences 2024年第4期138卷 385-394页

作者： liuwei Kong Mengdi Song Xin li Ying liu Sihua Lu limin Zeng yuanhang Zhang State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China

The coordinated control of PM_(2.5)and ozone has become the strategic goal of national air pollution *** the gradual decline in PM_(2.5)concentration and the aggravation of ozone pollution,a better understanding of the coordinated control of PM_(2.5)and ozone is urgently ***,we collected and sorted air pollutant data for 337 cities from 2015 to 2020 to explore the characteristics of PM_(2.5)and ozone pollution based on China’s five major air pollution *** results show that it is necessary to continue to strengthen the emission reduction in PM_(2.5)and ozone precursors,and control NO_(x) and VOCs while promoting a dramatic emission reduction in PM_(2.5).The primary method of curbing ozone pollution is to strengthen the emission control of VOCs,with a long-term strategy of achieving substantial emission reductions in NO_(x),because VOCs and NO_(x) are also precursors to PM_(2.5);hence,their reductions also contribute to the reduction in PM_(2.5).Therefore,the implementation of a multipollutant emission reduction control strategy aimed at the prevention and control of PM_(2.5)and ozone pollution is the only means to realize the coordinated control of PM_(2.5)and ozone.

关键词： PM_(2.5) Ozone Coordinated control Multipollutant reduction

Regression Method for Rail Fastener Tightness Based on Center-line Projection

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Chinese Journal of Mechanical Engineering 2024年第2期37卷 356-371页

作者： yuanhang Wang Duxin liu Sheng Guo Yifan Wu Jing liu Wei li Hongjie Wang Robotics Research Center School of MechanicalElectronic and Control EngineeringBeijing Jiaotong UniversityBeijing 100044China China Construction Industrial&Energy Engineering Group Co. Ltd.Nanjing 210023China

In the railway system,fasteners have the functions of damping,maintaining the track distance,and adjusting the track ***,routine maintenance and inspection of fasteners are important to ensure the safe operation of track ***,assessment methods for fastener tightness include manual observation,acoustic wave detection,and image *** are limitations such as low accuracy and efficiency,easy interference and misjudgment,and a lack of accurate,stable,and fast detection *** at the small deformation characteristics and large elastic change of fasteners from full loosening to full tightening,this study proposes high-precision surface-structured light technology for fastener detection and fastener deformation feature extraction based on the center-line projection distance and a fastener tightness regression method based on neural ***,the method uses a 3D camera to obtain a fastener point cloud and then segments the elastic rod area based on the iterative closest point algorithm *** component analysis is used to calculate the normal vector of the segmented elastic rod surface and extract the point on the centerline of the elastic *** point is projected onto the upper surface of the bolt to calculate the projection ***,the mapping relationship between the projection distance sequence and fastener tightness is established,and the influence of each parameter on the fastener tightness prediction is ***,by setting up a fastener detection scene in the track experimental base,collecting data,and completing the algorithm verification,the results showed that the deviation between the fastener tightness regression value obtained after the algorithm processing and the actual measured value RMSE was 0.2196 mm,which significantly improved the effect compared with other tightness detection methods,and realized an effective fastener tightness regression.

关键词： Railway system Fasteners Tightness inspection Neural network regression 3D point cloud processing

新时代黄河流域水土保持标准体系建设框架研究

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人民黄河 2024年第1期46卷 114-119页

作者：朱小勇王晶张帆杜亚娟李远航李普黄河水利委员会水土保持局河南郑州450003 黄河勘测规划设计研究院有限公司河南郑州450003

为了贯彻落实《黄河保护法》,推动黄河流域水土保持各项工作规范化、标准化,满足黄河流域水土保持事业高质量发展的现实需要,根据《黄河保护法》有关规定,结合新时代黄河流域水土保持工作目标和特点,在全面分析水土保持标准体系建立的... 详细信息

为了贯彻落实《黄河保护法》,推动黄河流域水土保持各项工作规范化、标准化,满足黄河流域水土保持事业高质量发展的现实需要,根据《黄河保护法》有关规定,结合新时代黄河流域水土保持工作目标和特点,在全面分析水土保持标准体系建立的背景、意义及必要性的基础上,全面梳理现行的水土保持国家标准体系,广泛征集有关省(区)业务人员和专家的意见、建议,组织专家开展专题研究,提出了包括基础类、规划设计类、治理类、淤地坝类、监测类、监管类、信息化类、试验示范类等8类73项标准(其中沿用原有标准48项、建议新增标准25项)的黄河流域水土保持标准体系建设框架。

关键词：水土保持标准体系高质量发展黄河流域

A rapid nucleic acid detection platform based on phosphorothioate-DNA and sulfur binding domain

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Synthetic and Systems Biotechnology 2023年第2期8卷 213-219页

作者： Yuting Shuai Yi Ju yuanhang li Dini Ma Lan Jiang Jingyu Zhang Gao-Yi Tan Xueting liu Shenlin Wang lixin Zhang Guang liu State Key Laboratory of Bioreactor Engineering and School of BiotechnologyEast China University of Science and Technology(ECUST)Shanghai200237China State Key Laboratory of Microbial Metabolism Joint International Research Laboratory of Metabolic&Developmental SciencesSchool of Life Sciences&BiotechnologyShanghai Jiao Tong UniversityShanghai200240China

Nucleic acid detection plays a key role in diverse diagnosis and disease *** available nucleic acid detection techniques are challenged by trade-offs among speed,simplicity,precision and ***,we described a novel method,designated SENSOR(Sulfur DNA mediated nucleic acid sensing platform),for rapid nucleic acid *** was developed from phosphorothioate(PT)-DNA and sulfur binding domain(SBD)which specifically binds double-stranded PT-modified *** utilizes PT-DNA oligo and SBD as targeting module,which is linked with split luciferase reporter to generate luminescence signal within 10 *** tested detection on synthesized nucleic acid and COVID-19 pseudovirus,achieving attomolar sensitivity combined with an amplification *** nucleotide polymorphisms(SNP)could also be *** SENSOR a new promising nucleic acid detection technique.

关键词： Phosphorothioate Sulfur binding domain Nucleic acid detection

深圳后棱蛇(有鳞目:蛇亚目:水游蛇科)补充描述和受胁等级评估

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四川动物 2024年第4期43卷 434-441页

作者：肖嘉杰林石狮曾昭驰王志广陈鸿辉詹彬彬肖微文毛颖津李远航王健广东省野生动物监测救护中心广州510520 广东环境保护工程职业学院广东佛山528216

2023年于广东省惠州市惠东县莲花山采集到3号后棱蛇属Opisthotropis物种标本,经分子和形态学比对后鉴定为深圳后棱蛇***,为该种已知最东分布点。此前,深圳后棱蛇形态数据仅依据2号雄性和4号雌性模式系列标本确定,本研究依据新采的2号雄... 详细信息

2023年于广东省惠州市惠东县莲花山采集到3号后棱蛇属Opisthotropis物种标本,经分子和形态学比对后鉴定为深圳后棱蛇***,为该种已知最东分布点。此前,深圳后棱蛇形态数据仅依据2号雄性和4号雌性模式系列标本确定,本研究依据新采的2号雄性标本和1号雌性标本,对深圳后棱蛇进行了形态学的补充描述。深圳后棱蛇目前仅知6个分布点,集中于深圳和东莞,结合其分布和栖息地现状,依据IUCN濒危物种红色名录的评定标准,建议将其评估为易危(VU)等级。

关键词：深圳后棱蛇形态学分布区扩大保育