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Water quality and habitat drive phytoplankton taxonomic and functional group patterns in the Yangtze River

Ecological Processes 2024年第1期13卷 144-158页

作者： Wenqi Gao Fangyuan Xiong Ying Lu Wei Xin Haihua Wang Gangpeng Feng Chiping Kong Lei Fang xiaoping Gao Yushun Chen State Key Laboratory of Freshwater Ecology and Biotechnology Institute of Hydrobiology Chinese Academy of Sciences University of Chinese Academy of Sciences Jiangxi Institute for Fisheries Sciences Poyang Lake Fisheries Research Centre of Jiangxi Province East China Sea Fisheries Research Institute Chinese Academy of Fishery Sciences Jiujiang Institute of Agricultural Sciences

Background Although phytoplankton are important primary producers in food webs, they are relatively less studied in large rivers compared to other types of systems. To fill this research gap, we studied phytoplankton taxonomic and functional composition and their relationships with water quality, habitat, climate, and land use across 30 river sections in the middle and lower reaches of the Yangtze River during 2017–*** Major observed phytoplankton groups were cyanobacteria, bacillariophyta, and chlorophyta. Phytoplankton total abundance, total biomass, and species richness significantly decreased in the dry season compared to the wet season, with the species and functional composition differing significantly between seasons. Phytoplankton species differences between seasons were mainly contributed by Oscillatoria sp., Pseudanabaena sp., and Melosira granulata. The dfferences in phytoplankton functional groups between seasons were mainly contributed by P（including Closterium sp., Melosira sp.）, Lo（including Merismopedia sp., Peridinium sp., Ceratium sp., and Gymnodinium sp.）, and J（including Pediastrum sp., Tetraedron sp., Crucigenia sp., Scenedesmus sp., and Coelastrum sp.）. The variance partitioning showed that water quality（NO3-N, total suspended solids, turbidity） and habitat（water flow, river bank and river channel conditions） were critical factors in shaping phytoplankton patterns, followed by climate and land *** Results indicated that there was significant seasonal variation of phytoplankton in the Yangtze River, with water quality and habitat primarily driving phytoplankton patterns. Our study contributes to the understanding of natural and anthropogenic factors that drive seasonal successional processes of phytoplankton in the Yangtze River. These findings have important implications for environmental management as well as towards the ecological restoration of large rivers.

关键词： Yangtze River Phytoplankton Functional group Water quality Physical habitat

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电动汽车全生命周期碳排放

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储能科学与技术 2023年第3期12卷 976-984页

作者：康小平聂慧慧郜敏吴凤彪山西能源学院山西晋中030604 太原理工大学山西太原030024 太原科技大学山西太原030024

汽车全生命周期的碳排放规律是研究汽车碳减排路径的必要条件。为获得电动汽车全生命周期碳排放规律,利用碳排放因子法建立了从材料获取到整车生产,再到使用、回收再利用的碳排放计算模型。以比亚迪E6汽车为例,依据2021年电力结构数据... 详细信息

汽车全生命周期的碳排放规律是研究汽车碳减排路径的必要条件。为获得电动汽车全生命周期碳排放规律,利用碳排放因子法建立了从材料获取到整车生产,再到使用、回收再利用的碳排放计算模型。以比亚迪E6汽车为例,依据2021年电力结构数据对其全生命周期碳排放计算,从生命周期的不同阶段、整车组成部件和材料的角度分析了碳排放特点,并分析了动力电池回收再利用技术和电力结构的碳减排潜力。结果显示:使用阶段碳排放占比最高,达到88.4%,其次是材料获取阶段,碳排放占7.8%,回收再利用阶段碳排放为负值,产生正效益;能有效回收再利用的核减碳排放量,核减量占总碳排放量22.1%,动力电池采用梯次利用技术再利用率最高,使动力电池在材料获取阶段碳排放占比下降到7.3%;碳排放量占比最大部件为车身,碳排放量占比最大材料为塑料;当电力结构中清洁能源占比达到67.5%,单车碳排放量是2021年排放量的54.6%;当电力结构中清洁能源占比达到96%,单车碳排放量是2021年排放量的20.3%。研究结果为我国汽车碳减排政策制定和行业技术改进提供了科学依据。

关键词：碳排放碳排放因子梯次利用回收再利用技术

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Adhesive Properties between Recycled Concrete Aggregate and Asphalt

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Journal of Traffic and Transportation Engineering(English Edition) 2024年

作者： Yueqin Hou xiaoping Ji Yun Chen Haoyu Zhou Chengchen He Key Laboratory for Special Area Highway Engineering of Ministry of Education Chang'an University Jiangsu Shuangning Engineering Consulting Co. Ltd. School of Human Settlements and Civil Engineering Xi'an Jiaotong University

The unique surface microscopic morphology (SMM) and chemical composition of RCA would affect its adhesion to asphalt. This research examined the SMM parameters and surface energies of RCA and asphalt utilizing laser microscope system (LMS) and atomic force microscopy (AFM)， correspondingly. The pull-off tests were employed to examine the macroscopic adhesive strength between recycled concrete aggregate (RCA) and asphalt， and the study examined the impact of SMM and surface energies of the materials on this macroscopic adhesive strength. In the final phase， this study delved into the multi-scale adhesion mechanisms between RCA and asphalt. Findings demonstrate that an increase in grade correspondingly elevates the surface roughness and surface energy of the asphalt. For asphalt containing bee-like structures， the surface energy in other regions surpassed that of the convex part and concave part. With the increase of water-cement ratio of RCA， the SMM roughness increases and the surface energy decreases. The adhesion of RCA to asphalt is the result of both physical and chemical adhesion， about 60% from chemical effect and the remaining about 40% from physical effect.

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部分相干双曲正弦-高斯光束的传输和聚焦特性

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红外与激光工程 2015年第2期44卷 486-490页

作者：李长伟康小平何仲琼州学院理工学院海南三亚572022

为了研究部分相干双曲正弦-高斯(SHG)光束通过像散透镜的传输和聚焦特性,利用部分相干光的传输公式,推导了光束通过像散透镜后光强分布解析的表达式,并据此得到了光束束腰宽度、远场发散角和M2因子的解析表达式,并对光束强度分布和束腰... 详细信息

为了研究部分相干双曲正弦-高斯(SHG)光束通过像散透镜的传输和聚焦特性,利用部分相干光的传输公式,推导了光束通过像散透镜后光强分布解析的表达式,并据此得到了光束束腰宽度、远场发散角和M2因子的解析表达式,并对光束强度分布和束腰宽度进行了数值计算和分析。结果表明:部分相干Sh G光束聚焦的光强分布与像散系数C6,空间相干参数β,离心参数a,菲涅耳数Nw和位置(x,y,z)有关。像散导致x和y方向束宽不同。但M2因子与像散无关,并随相干性的增加和离心参数的减小而减小。适当改变像散和空间相干性,在几何焦面和其它位置可实现部分相干Sh G光束的空间整形。

关键词：传输和聚焦特性像散透镜部分相干双曲正弦-高斯(Sh G)光束

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非傍轴平顶高斯光束M^2因子两种定义的比较研究

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光子学报 2006年第3期35卷 431-434页

作者：康小平吕百达四川大学激光物理与化学研究所

基于功率密度的二阶矩方法,推导出了非傍轴平顶高斯(FG)光束束宽和远场发散角的解析表达式·研究表明,当w0/λ→0时,远场发散角趋于渐近值θmax=63.435°,与阶数无关·使用非傍轴高斯光束代替傍轴高斯光束作为理想光束,研究了非傍轴FG... 详细信息

基于功率密度的二阶矩方法,推导出了非傍轴平顶高斯(FG)光束束宽和远场发散角的解析表达式·研究表明,当w0/λ→0时,远场发散角趋于渐近值θmax=63.435°,与阶数无关·使用非傍轴高斯光束代替傍轴高斯光束作为理想光束,研究了非傍轴FG光束的M2因子,并与传统定义的M2因子作了比较·在非傍轴范畴,非傍轴FG光束的M2因子不仅与阶数N有关,而且与w0/λ有关·按照定义,当w0/λ→0时,非傍轴FG光束的M2因子不等于0,对阶数N=1,2,3时,M2因子分别趋于0.913,0.882和0.886·当N→∞时,M2因子取最小值M2min=0.816·

关键词：非傍轴平顶高斯光束 M^2因子功率密度

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动因与逻辑：我国农民工欠薪治理政策演进的二维分析

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社会科学研究 2024年第4期 1-12页

作者：姜晓萍康传彬四川大学公共管理学院

农民工欠薪治理不仅关乎劳有所得的公平性和可及性，更是实现全体人民共同富裕的必然要求。本文通过梳理我国农民工欠薪治理的政策演进脉络，借鉴历史制度主义构建分析框架来解释政策演进的动因与逻辑，探索二者的有机关系。在演进动因... 详细信息

农民工欠薪治理不仅关乎劳有所得的公平性和可及性，更是实现全体人民共同富裕的必然要求。本文通过梳理我国农民工欠薪治理的政策演进脉络，借鉴历史制度主义构建分析框架来解释政策演进的动因与逻辑，探索二者的有机关系。在演进动因上，央地政府、农民工、用工企业等行动主体，通过共时性调适促成关系合力，关系合力的方向调整和强度凝聚牵引着欠薪治理政策不断演进。在演进逻辑上，高位推动、刚性规制、扶弱固本的路径依赖，通过历时性重构塑造内在规律，渐进延续规律和迭代升级规律的耦合使欠薪治理政策保持着稳中有进、变中有新的连贯形态。而动因和逻辑之间，存在着问题解释上的互补关系和作用路径上的互促关系。本研究不仅从政策分析层面作出了边际贡献，为理解中国场景下的民生政策演进提供了共性借鉴，而且厘清了政策优化的着力方向，有利于筑牢农民工群体融入共同富裕的政策支持。

关键词：农民工欠薪治理政策演进历史制度主义共同富裕

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Quantum circuit-based proxy blind signatures:A novel approach and experimental evaluation on the IBM quantum cloud platform

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Chinese Physics B 2024年第5期33卷 247-253页

作者：娄小平昝慧茹徐雪娇 College of Information Science and Engineering Hunan Normal UniversityChangsha 410081China

This paper presents a novel approach to proxy blind signatures in the realm of quantum circuits,aiming to enhance security while safeguarding sensitive *** main objective of this research is to introduce a quantum proxy blind signature(QPBS)protocol that utilizes quantum logical gates and quantum measurement *** QPBS protocol is constructed by the initial phase,proximal blinding message phase,remote authorization and signature phase,remote validation,and de-blinding *** innovative design ensures a secure mechanism for signing documents without revealing the content to the proxy signer,providing practical security authentication in a quantum environment under the assumption that the CNOT gates are securely *** existing approaches,our proposed QPBS protocol eliminates the need for quantum entanglement preparation,thus simplifying the implementation *** assess the effectiveness and robustness of the QPBS protocol,we conduct comprehensive simulation studies in both ideal and noisy quantum environments on the IBM quantum cloud *** results demonstrate the superior performance of the QPBS algorithm,highlighting its resilience against repudiation and forgeability,which are key security concerns in the realm of proxy blind ***,we have established authentic security thresholds(82.102%)in the presence of real noise,thereby emphasizing the practicality of our proposed solution.

关键词： proxy blind signature quantum circuits quantum computation IBM quantum cloud platform

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Click-hydrogel delivered aggregation-induced emissive nanovesicles for simultaneous remodeling and antibiosis of deep burn wounds

Aggregate

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Aggregate 2024年第1期5卷 244-256页

作者： Xu Chen Meijiao Zhao Qihu Xie Sitong Zhou xiaoping Zhong Judun Zheng Ronghua Yang Xianjin Du Jinyu Xia Yuhui Liao Department of Infectious Diseases The Fifth Affiliated HospitalSun Yat-sen UniversityZhuhaiChina Molecular Diagnosis and Treatment Center for Infectious Diseases Dermatology HospitalSouthern Medical UniversityGuangzhouChina Department of Burns and Plastic Surgery The Second Affiliated Hospital of Shantou University Medical CollegeShantouChina Department of Dermatology TheFirst People’s Hospital of FoshanFoshanChina Department of Burn and Plastic Surgery Guangzhou First People’s HospitalSouth China University of TechnologyGuangzhouChina Department of Critical Care Medicine Renmin Hospital of Wuhan UniversityWuhanChina

As a high-risk trauma,deep burns are always hindered in their repair process by decreased tissue regeneration capacity and persistent *** this study,we developed a simultaneous strategy for deep burn wounds treatment using functional nanovesicles with antibacterial and tissue remodeling properties,delivered via a click-chemistry *** aggregation-induced emission photosensitizer of 4-(2-(5-(4-(diphenylamino)phenyl)thiophen-2-yl)vinyl)-1-(2-hydroxyethyl)pyridin-1-ium bromide(THB)with excellent photodynamic properties was first prepared,and then combined with readily accessible adipose stem cells-derived nanovesicles to generate the THB functionalized nanovesicles(THB@ANVs).The THB@ANVs showed strong antibacterial activity against Gram-positive bacteria(up to 100%killing rate),and also beneficial effects on tissue remodeling,including promoting cell migration,cell proliferation,and regulating *** addition,we prepared a click-hydrogel of carboxymethyl chitosan for effective delivery of THB@ANVs on *** hydrogel could be injected to conform to the wound morphology while responding to the acidic *** vivo evaluations of wound healing revealed that the THB@ANVs hydrogel dressing efficiently accelerated the healing of second-degree burn wounds by reducing bacterial growth,regulating inflammation,promoting early angiogenesis,and collagen *** study provides a promising candidate of wound dressing with diverse functions for deep burn wound repair.

关键词： aggregation-induced emission burn wounds nanovesicles

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High-Value-Added Utilization of Turpentine:Screening of Anti-Influenza Virus Agents fromβ-Pinene Derivatives

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Journal of Renewable Materials 2024年第1期12卷 45-56页

作者： Yiwen Li Hongyan Si Peng Wang Hai Luo Minggui Shen xiaoping Rao Zhanqian Song Shibin Shang Zongde Wang Shengliang Liao East China Woody Fragrance and Flavor Engineering Research Center of National Forestry and Grassland Administration Camphor Engineering Research Center of National Forestry and Grassland AdministrationCollege of ForestryJiangxi Agricultural UniversityNanchang330045China Institute of Chemical Industry of Forestry Products China Academy of ForestryNational Engineering Laboratory for Biomass Chemical UtilizationKey and Open Laboratory of Forest Chemical EngineeringState Forestry AdministrationKey Laboratory of Biomass Energy and MaterialJiangsu ProvinceNanjing210042China College of Chemical Engineering Huaqiao UniversityXiamen361021China

Turpentine is a renewable and resourceful forest *** deep processing and utilization of turpentine,particularly its primary componentβ-pinene,has garnered widespread *** study aimed to synthesize 40 derivatives ofβ-pinene,including nopinone,3-cyanopyridines of nopinone,myrtanyl acid,myrtanyl acylthioureas,and myrtanyl *** assessed the antiviral activities of theseβ-pinene derivatives against influenza virus A/Puerto Rico/8/34(H1N1)using the 3-(4,5-dimetylthiazol-2-yl)-2,5-diphenyltetrazolium bromide ***β-pinene derivatives were used before and after cellular infection with the influenza virus to evaluate their preventive and therapeutic effects against the H1N1 *** results showed that only compound 10o exhibited a preventive effect against the H1N1 virus with a half-maximal inhibitory concentration(IC50)value of 47.6μmol/*** the compounds,4e,4i,and 4l demonstrated therapeutic effects against cellular infection,with compound 4e displaying the most potent therapeutic effect(IC50=17.5μmol/L),comparable to the positive control *** findings indicated that certainβ-pinene derivatives exhibited in vitro antiviral activity against the H1N1 influenza A virus,warranting further investigation as potential anti-influenza agents.

关键词： Antiviral activity β-pinene derivative 3-cyanopyridine influenza virus

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Nutrient enrichment driven by canopy rainfall redistribution:Mechanism,quantification,and pattern

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Science China Earth Sciences 2024年第5期67卷 1529-1544页

作者： Chuan YUAN xiaoping YUE Yafeng ZHANG Yu ZHANG Yanting HU Qiang TANG Li GUO Shuai WANG Xingwu DUAN Wenhua XIANG Xiaohua WEI Xiaoyan LI College of Forestry and Biotechnology Zhejiang A&F UniversityHangzhou 311300China Chongqing Jinfo Mountain Karst Ecosystem National Observation and Research Station School of Geographical SciencesSouthwest UniversityChongqing 400715China Shapotou Desert Research and Experiment Station Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China School of Geographical Sciences Hebei Normal UniversityShijiazhuang 050024China Faculty of Life Science and Technology Central South University of Forestry and TechnologyChangsha 410004China State Key Laboratory of Hydraulics and Mountain River Engineering College of Water Resource and HydropowerSichuan UniversityChengdu 610065China State Key Laboratory of Earth Surface Processes and Resource Ecology Faculty of Geographical ScienceBeijing Normal UniversityBeijing 100875China Yunnan Key Laboratory of Soil Erosion Prevention and Green Development Institute of International Rivers and Eco-securityYunnan UniversityKunming 650091China Department of Earth Environmental and Geographic SciencesUniversity of British Columbia(Okanagan)KelownaBritish Columbia V1V 1V7Canada

Vegetation canopies intercept and redistribute rainfall into throughfall and stemflow,which transfer substantial amounts of elements into the soil,influencing soil microbial community,plant survival,and plant community *** advancements in ecohydrological research,the implication of nutrient enrichment resulting from this redistribution of rainfall by canopies remains largely *** address this gap,we conducted a systematic review of 1020 papers published between 2000 and 2022,gathering data on nutrient concentration and enrichment for critical ions(including K^(+),Na^(+),Ca^(2+),Mg^(2+),NH_(4)^(+),Cl^(-),NO_(3)^(-)and SO_(4)^(2-))from the Web of Science and Chinese Knowledge Infrastructure *** aimed to synthesize the mechanisms,quantify the enrichments,and identify global patterns of nutrient enrichment in stemflow and throughfall across climate zones,and vegetation types and *** results of this study indicate that stemflow exhibits,on average,2.1times greater ion concentration(6.13 mg L^(-1))compared to *** particular,among the investigated ions,SO_(4)^(2-)(12.45and 6.32 mg L^(-1))for stemflow and throughfall,respectively,and Cl^(-)(9.21 and 4.81 mg L^(-1))exhibit the highest concentrations in both rainfall redistribution components,while K^(+)(13.7 and 5.8)and Mg^(2+)(5.6 and 2.8)have the highest enrichment *** climate zones,throughfall and stemflow show the lowest ion concentrations but the highest enrichment factors in extremely humid *** the temperature gradient,ion concentrations are the highest in cold climates with no clear patterns observed for enrichment factors with increasing *** addition,shrubs,conifers,mixed forests,and artificial ecosystems demonstrate enrichment factors 1.1 to 3.0 times greater than those of trees,broad-leaved plants,pure forests,and natural *** findings emphasize the need for increased attentions to artificial ecosystems,such as urban

关键词： Ecohydrology Rainfall redistribution Nutrients transport Enrichment characteristics Climate zones

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