检索结果-南通市图书馆

In situ Growing PtCo Bimetallic Catalyst on Plant Tannin-grafted Collagen Fiber for Catalytic Hydrogenation of Cinnamaldehyde with Desirable Performance

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chemical research in Chinese Universities 2018年第2期34卷 285-289页

作者： LIAO Ziyi LAN Yang WANG Kai LEI Miao LIAO Yang MAO Hui MA Jun ZHAO Shilin Department of Scienttfic research Sichuan Normal University Chengdu 610068 P. R. China College of Chemistry and Materials Science Sichuan Normal University Chengdu 610068 P. R. China engineering research center for the development of farmland ecosystem service functions Sichuan Province Institutions of Higher Education Chengdu 610068 P. R. China

PtCox bimetallic nanoparticles（NPs） supported on tannin-grafted collagen fiber（CF-BT） have been pre- pared via a novel synthetic strategy, and applied for catalytic hydrogenation of cinnamaldehyde（CAL）, a typic unsa- turated aldehyde. The catalysts were systematically artd specifically characterized by means of XRD, XPS, TEM-EDX and SEM to clarify the structure-property correlation. It was found that the PtCox/CF-BT catalysts exhi- bited significantly enhanced catalytic activity and desirable stability in catalytic hydrogenation of CAL, which is ascribed to the synergistic interaction between bimetallic components, the effective dispersion, the anchoring role of CF-BT matrix on bimetallic NPs, as well as the lower mass transfer resistance of the matrix.

关键词： Heterogeneous PtCox bimetallic catalyst Tannin-grafted collagen fiber Cinnamaldehyde Liquid-phase hydrogenation

Nitrogen mobility,ammonia volatilization,and estimated leaching loss from long-term manure incorporation in red soil

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2017年第9期16卷 2082-2092页

作者： HUANG Jing DUAN Ying-hua XU Ming-gang ZHAI Li-mei ZHANG Xu-bo WANG Bo-ren ZHANG Yang-zhu GAO Su-duan SUN Nan College of Resources and Environment Hunan Agricultural UniversityChangsha 410128P.R.China Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences(CAAS)/National Engineering Laboratory for Improving Quality of Arable LandBeijing 100081P.R.China Red Soil Experimental Station of CAAS in Hengyang/National Observation and research Station of farmland ecosystem in Qiyang Qiyang 426182P.R.China Key Laboratory of ecosystem Network Observation and Modeling/Yucheng Comprehensive Experiment Station Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101P.R.China USDA Agricultural research service San Joaquin Valley Agricultural Sciences CenterCA 93648-9757USA

Nitrogen（N） loss from fertilization in agricultural fields has an unavoidable negative impact on the environment and a better understanding of the major pathways can assist in developing the best management practices. The aim of this study was to evaluate the fate of N fertilizers applied to acidic red soil（Ferralic Cambisol） after 19 years of mineral（synthetic） and manure fertilizer treatments under a cropping system with wheat-maize rotations. Five field treatments were examined： control（CK）, chemical nitrogen and potash fertilizer（NK）, chemical nitrogen and phosphorus fertilizer（NP）, chemical nitrogen, phosphorus and potash fertilizer（NPK） and the NPK with manure（NPKM, 70% N from manure）. Based on the soil total N storage change in 0–100 cm depth, ammonia（NH_3） volatilization, nitrous oxide（N_2O） emission, N plant uptake, and the potential N leaching loss were estimated using a mass balance approach. In contrast to the NPKM, all mineral fertilizer treatments（NK, NP and NPK） showed increased nitrate（NO_3~–） concentration with increasing soil depth, indicating higher leaching potential. However, total NH_3 volatilization loss was much higher in the NPKM（19.7%） than other mineral fertilizer treatments（≤4.2%）. The N_2O emissions were generally low（0.2–0.9%, the highest from the NPKM）. Total gaseous loss accounted for 1.7, 3.3, 5.1, and 21.9% for NK, NP, NPK, and NPKM treatments, respectively. Estimated N leaching loss from the NPKM was only about 5% of the losses from mineral fertilizer treatments. All data demonstrated that manure incorporation improved soil productivity, increased yield, and reduced potential leaching, but with significantly higher NH_3 volatilization, which could be reduced by improving the application method. This study confirms that manure incorporationis an essential strategy in N fertilization management in upland red soil cropping system.

关键词： soil NO_3~–-N ammonia volatilization nitrogen leaching long-term field experiment mass balance nitrous oxide emission

research on groundwater ecological environment mapping based on ecological service function:A case study of five Central Asian countries and neighboring regions of China

在线全文

学校读者我要写书评

暂无评论

Journal of Groundwater Science and engineering 2024年第3期12卷 339-346页

作者： Li-qiang Ge Yan-pei Cheng Qing Yi Xue-ru Wen Hua Dong Kun Liu Jian-kang Zhang National research center for Geoanalysis Beijing 100037China Institute of Hydrogeologv and Environimental Geology Chinese Academy of Geological SciencesShijiazhuang 050061China

The groundwater system is a unique ecosystem that serves both resource and ecological *** have conducted extensive theoretical research and practical work on groundwater ecological *** paper,based on the study of groundwater resources and surface ecology in the five Central Asian countries and adjacent areas of China,introduces the concept of ecosystem service *** establishes a groundwater ecological zoning index system and conducts research of ecological mapping using the five Central Asian countries and adjacent areas of China as *** this process,the ecosystem service functions of groundwater can be more comprehensively reflected,which can better guide regional geological environment protection and industrial *** approach helps coordinate the relationship between socio-economic development and water resource protection,maintain the health of the groundwater ecological environment,enhance the value of groundwater ecological services,and promote the sustainable development of regional economies and societies.

关键词： Groundwater ecosystem Groundwater ecological service Ecological zoning of groundwater Five Central Asian countries

research PROGRESS ON THE IMPACT OF NITROGEN DEPOSITION ON GLOBAL GRASSLANDS

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Agricultural Science and engineering 2022年第3期9卷 425-444页

作者： Carly J.STEVENS Sofía BASTO Michael DBELL Tianxiang HAO Kevin KIRKMAN Raul OCHOA-HUESO Lancaster Environment Centre Lancaster UniversityLancasterLA14YQUK Unidad de Ecologia y Sistematica Departamento de BiologiaFacultad de CienciasPontificia Universidad JaverianaCarrera 7 No.43-82 Ed.Jesus Emilio Ramirez(53)BogotaColombia National Park service Air Resources DivisionLakewoodCO 80235USA Synthesis research center of Chinese ecosystem research Network Key Laboratory of Ecosystem Network Observation and ModelingInstitute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China College of Resources and Environmental Sciences National Academy of Agriculture Green DevelopmentKey Laboratory of Plant-Soil Interactions of Ministry of EducationBeijing Key Laboratory of Farmland Soil Pollution Prevention and RemediationChina Agricultural UniversityBeijing 100193China School of Life Sciences University of KwaZulu-NatalDurban4041South Africa Departamento de Biologia-IVAGRO Universidad de CadizCampus Rio San Pedro11510 Puerto RealSpain Department of Terrestrial Ecology Netherlands Institute of Ecology(NIOO-KNAW)P.O.Box 506700 ABWageningenthe Netherlands

Grasslands are globally-important ecosystems providing critical ecosystem *** species composition and characteristics of grasslands vary considerably across the planet with a wide variety of different grasslands ***,in many regions grasslands have been impacted by atmospheric nitrogen deposition originating from anthropogenic activities with effects on productivity,species composition and diversity widely *** vary across grassland habitats but many show declines in species richness and increases in biomass production related to soil eutrophication and *** a continental level,there is considerable variation in the research effort that has been put into understanding the impacts of nitrogen *** Europe,North America and parts of Asia,although there are unanswered research questions,there is a good understanding of N deposition impacts in most grassland *** is not the case in other regions with large knowledge gaps in some parts of the *** paper reviews the impacts of N deposition on grasslands around the world,highlighting recent advances and areas where research is still needed.

关键词： acidification biomass production critical load eutrophication species composition species richness

Machine learning-based zero-touch network and service management:a survey

在线全文

学校读者我要写书评

暂无评论

Digital Communications and Networks 2022年第2期8卷 105-123页

作者： Jorge Gallego-Madrid Ramon Sanchez-Iborra Pedro M.Ruiz Antonio F.Skarmeta Department of Information and Communication engineering University of Murcia30100MurciaSpain Department of engineering and Applied Techniques University Center of Defense30729San Javier Air Force BaseSpain

The exponential growth of mobile applications and services during the last years has challenged the existing network ***,the arrival of multiple management solutions to cope with this explosion along the end-to-end network chain has increased the complexity in the coordinated orchestration of different segments composing the whole *** Zero-touch Network and service Management(ZSM)concept has recently emerged to automatically orchestrate and manage network resources while assuring the Quality of Experience(QoE)demanded by *** Learning(ML)is one of the key enabling technologies that many ZSM frameworks are adopting to bring intelligent decision making to the network management *** paper presents a comprehensive survey of the state-of-the-art application of ML-based techniques to improve ZSM *** this end,the main related standardization activities and the aligned international projects and research efforts are deeply *** this dissection,the skyrocketing growth of the ZSM paradigm can be ***,different standardization bodies have already designed reference architectures to set the foundations of novel automatic network management functions and resource *** with these advances,diverse ML techniques are being currently exploited to build further ZSM developments in different aspects,including multi-tenancy management,traffic monitoring,and architecture coordination,among ***,different challenges,such as the complexity,scalability,and security of ML mechanisms,are also identified,and future research guidelines are provided to accomplish a firm development of the ZSM ecosystem.

关键词： Zero-touch network and service management(ZSM) Next generation networks(NGN) Artificial intelligence(AI) Machine learning(ML)

Nonlinear health evaluation for lithium-ion battery within full-lifespan

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2022年第9期31卷 333-341,I0010页

作者： Heze You Jiangong Zhu Xueyuan Wang Bo Jiang Hao Sun Xinhua Liu Xuezhe Wei Guangshuai Han Shicong Ding Hanqing Yu Weihan Li Dirk Uwe Sauer Haifeng Dai School of Automotive Studies Tongji UniversityShanghai 201804China National Fuel Cell Vehicle&Powertrain System research&engineering center Shanghai 201804China Institute for Advanced Study Tongji UniversityShanghai 200092China Shanghai AI NEV Innovative Platform Co. Ltd.Shanghai 201804China School of Transportation Science and engineering Beihang UniversityBeijing 100191China Chair for Electrochemical Energy Conversion and Storage Systems Institute for Power Electronics and Electrical Drives(ISEA)RWTH Aachen UniversityAachen 52062Germany

Lithium-ion batteries(LIBs), as the first choice for green batteries, have been widely used in energy storage, electric vehicles, 3C devices, and other related fields, and will have greater application prospects in the future. However, one of the obstacles hindering the future development of battery technology is how to accurately evaluate and monitor battery health, which affects the entire lifespan of battery use. It is not enough to assess battery health comprehensively through the state of health(SoH) alone, especially when nonlinear aging occurs in onboard applications. Here, for the first time, we propose a brand-new health evaluation indicator—state of nonlinear aging(SoNA) to explain the nonlinear aging phenomenon that occurs during the battery use, and also design a knee-point identification method and two SoNA quantitative methods. We apply our health evaluation indicator to build a complete LIB full-lifespan grading evaluation system and a ground-to-cloud service framework, which integrates multi-scenario data collection, multi-dimensional data-based grading evaluation, and cloud management functions. Our works fill the gap in the LIBs’ health evaluation of nonlinear aging, which is of great significance for the health and safety evaluation of LIBs in the field of echelon utilization such as vehicles and energy storage. In addition, this comprehensive evaluation system and service framework are expected to be extended to other battery material systems other than LIBs, yet guiding the design of new energy ecosystem.

关键词： Lithium-ion battery State of nonlinear aging Knee-point Grading evaluation system Echelon utilization

Trade-offs and Synergies of ecosystem services in Karst Area of China Driven by Grain-for-Green Program

在线全文

学校读者我要写书评

暂无评论

Chinese Geographical Science 2020年第1期30卷 101-114页

作者： WANG Xiaofeng ZHANG Xinrong FENG Xiaoming LIU Shirong YIN Lichang CHEN Yongzhe School of Earth Science and Resources Chang'an UniversityXi'an 710054China Shaanxi Key Laboratory of Land Consolidation Xi'an 710054China State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Institute of Forest Ecology Environment and ProtectionChinese Academy of ForestryBeijing 100091China

As an important means regulating the relationship between human and natural ecosystem,ecological restoration program plays a key role in restoring ecosystem *** Grain-for-Green Program(GFGP,One of the world’s most ambitious ecosystem conservation set-aside programs aims to transfer farmland on steep slopes to forestland or grassland to increase vegetation coverage)has been widely implemented from 1999 to 2015 and exerted significant influence on land use and ecosystem services(ESs).In this study,three ecological models(In VEST,RUSLE,and CASA)were used to accurately calculate the three key types of ESs,water yield(WY),soil conservation(SC),and net primary production(NPP)in Karst area of southwestern China from 1982 to *** impact of GFGP on ESs and trade-offs was *** provides practical guidance in carrying out ecological regulation in Karst area of China under global climate *** showed that ESs and trade-offs had changed dramatically driven by *** detail,temporally,SC and NPP exhibited an increasing trend,while WY exhibited a decreasing ***,SC basically decreased from west to east;NPP basically increased from north to south;WY basically increased from west to east;NPP and SC,SC and WY developed in the direction of trade-offs driven by the GFGP,while NPP and WY developed in the direction of ***,future ecosystem management and restoration policy-making should consider trade-offs of ESs so as to achieve sustainable provision of ESs.

关键词： ecosystem service trade-off and synergy Grain-for-Green Program partial correlation analysis Karst area China

Evaluation of ecosystem service of straw return to soil in a wheat field of China

在线全文

学校读者我要写书评

暂无评论

International Journal of Agricultural and Biological engineering 2021年第1期14卷 192-198页

作者： Siyuan Cui Guangqiao Cao Xinkai Zhu Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation center for Modern Production Technology of Grain Crops Yangzhou UniversityYangzhou 225009JiangsuChina Key Laboratory of Modern Agricultural Equipment Ministry of AgricultureNanjing Institute of Agricultural MechanizationMinistry of Agriculture and Rural AffairsNanjing 210014China Joint International research Laboratory of Agriculture and Agri-Product Safety the Ministry of Education of ChinaYangzhou UniversityYangzhou 225009JiangsuChina

Crop straw is an important natural resource in China because it is rich in *** returned to fields after harvests,the straw can improve soil quality and the next crop’s *** the economic values of the main ecological services of a farmland ecosystem while implementing the straw return technique can be a more systematic and comprehensive approach to better understand the contribution of straw return to the development of ecological *** on the data of a field experiment established in 2010 with varying numbers of years of straw return,four ecological services,i.e.,agricultural product and industrial raw materials,atmospheric regulation and purification,soil nutrient accumulation,and water conservation,were selected to estimate a net ecosystem service value(ESV)of a wheat field’s ecosystem ***-ecosystem service appraisal theories were applied to estimate the economic value of each *** showed that straw returning improved the total ESV in the wheat *** to the no straw return treatment,1 year,3 years,5 years or 7 years of straw returning altered the economic value of the agricultural product and industrial raw materials(EVAIM)by-5.93%to 7.84%and improved atmospheric regulation(EVAR)by 13.66%-30.80%,soil nutrient accumulation(EVSNA)by 59.87%-233.31%and water conservation(EVWC)by 2.60%-13.26%.The total ESV of wheat plots with 1-7 years of straw returning was 3.67%-27.41%higher than that with no straw return,and the total ESV increased with the increase in years of straw *** proportion of EVAIM out of the total ESV in this wheat field system was highest(accounted for 47.09%-55.64%),followed by EVAR and *** value of EVSNA was the ***,the proportion of EVSNA was higher than that of water conservation after the fifth year of straw *** general,the adoption of continuous straw returning in a wheat field ecosystem is ecologically *** results can inform the development and i

关键词： ecosystem service value rice-wheat rotation straw returning farmland ecosystem economic value ecological service function

Significantly influenced photocatalytic performance for H_(2)O_(2)generation over ultrathin g-C_(3)N_(4)through regulating the migration orientation of photogenerated charge carriers

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2021年第11期32卷 3377-3381页

作者： Xinxia He Hongyan Shang Chuan Wang Le Chen Zehan Gong Jun Wang Shilin Zhao Jun Ma College of Chemistry and Materials Science Sichuan Normal UniversityChengdu 610068China Key Laboratory of Land Resources Evaluation and Monitoring in Southwest Ministry of Education of ChinaChengdu 610066China State Key Laboratory of Environmental-Friendly Energy Materials School of Materials Science and EngineeringSouthwest University of Science and TechnologyMianyang 621010China

H_(2)O_(2)has been widely applied in the fields of chemical synthesis,medical sterilization,pollutant removal,etc.,due to its strong oxidizing property and the avoidable secondary *** of the enhanced performance for H_(2)O_(2)generation over g-C_(3)N_(4)semiconductors through promoting the separation of photo-generated charge carriers,the effect of migration orientation of charge carriers is still *** this emotion,surface modification of g-C_(3)N_(4)was employed to adjust the migration orientation of charge carriers,in order to investigate systematically its effect on the performance of H_(2)O_(2)*** was found that ultrathin g-C_(3)N_(4)(UCN)modified by boron nitride(BN),as an effective hole-attract agent,demonstrated a significantly enhanced ***,for the optimum UCN/BN-40%catalyst,4.0-fold higher yield of H_(2)O_(2)was obtained in comparison with the pristine *** comparison,UCN modified by carbon dust demonstrated a completely opposite *** remarkably improved performance over UCN/BN was ascribed to the fact that more photo-generated electrons were remained inside of triazine structure of g-C_(3)N_(4),leading to the formation of larger amount of 1,*** is anticipated that our work could provide new insights for the design of photocatalyst with significantly improved performance for H_(2)O_(2)generation.

关键词： Ultra-thin g-C_(3)N_(4) Photocatalytic H_(2)O_(2)production Photogenerated charge carriers Migration orientation