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Environmental economic geography:Recent advances and innovative development

Geography and Sustainability 2022年第2期3卷 152-163页

作者： Canfei He Shuqi He enyi mu Jian Peng College of Urban and Environmental Sciences Peking UniversityBeijing 100871China Peking University-Lincoln Institute Center for Urban Development and Land Policy Beijing 100871China

Modern environmental problems are the result of human-environment interaction in the process of *** relationship between economic development and environmental quality is an important aspect of understanding human-environment interaction and has been widely concerned by multidisciplinary *** geography(EG)is a discipline that mainly focuses on the location and connections of economic *** has developed to environmental economic geography(EEG)by incorporating environmental factors into its research framework,considering the operational mechanism of the co-evolution of economy and environment,and the dynamic process of green transition of techno-economic *** the resource and environ-mental effects of R&D,production,trade,and other aspects of the economic cycle is beneficial to realizing the“greening”*** paper traces the background and theoretical development path of EEG and elaborates on the interaction between EEG and other research paradigms on environmental *** recent years,the focuses of EEG are as follows:(1)the“location-environment”relationship of production from the perspective of local actors;(2)the“GVC/GPN-environment”relationship of multinational enterprises and space of flows from the perspective of the global network;(3)the“trade/circulation-environment”relationship from the perspective of national linkages;and(4)the co-evolution of the economic system and environment from the perspective of synergistic evolution,with a focus on innovation and institutional *** future development trend of EEG is combined with the endogenous growth theory and the sustainable development theory,mainly from the aspects of endogenous,system integration and multi-scale,to explain the differences in environmental issues of differ-ent regional economic activities,and to promote the development of EEG theory and interdisciplinary research,strengthening the construction of global and regional sustai

关键词： Environmental economic geography Greening Evolution Sustainable development

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经济循环视角下的环境经济地理研究进展与议题

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地理科学进展 2023年第12期42卷 2423-2438页

作者：穆恩怡贺灿飞北京大学城市与环境学院北京100871 北京大学—林肯研究院城市发展与土地政策研究中心北京100871

解析经济活动和环境的关系及相互作用是理解人地关系的重要途径。环境经济地理应运而生,主要研究环境要素对经济活动的影响,以及经济活动对自然条件的选择、适应与改造。论文首先梳理环境经济地理学科演进,构建经济循环视角下的研究框架... 详细信息

解析经济活动和环境的关系及相互作用是理解人地关系的重要途径。环境经济地理应运而生,主要研究环境要素对经济活动的影响,以及经济活动对自然条件的选择、适应与改造。论文首先梳理环境经济地理学科演进,构建经济循环视角下的研究框架,发现其经历了从关注外生发展时的成本外化与外部治理,逐渐转变为成本内化,将自然资源考虑为资本的新经济模式的发展历程。论文对1996—2023年国内外经济—环境文献进行文献计量分析,总结出环境经济地理研究经历起步期、建构期、腾飞期等重要阶段。结合全球价值链和物料流通理论,论文分析出环境经济地理议题对后发区域“绿色化”转向、生产部门网络重构、演化经济地理需求侧以及全球—地方互动的关注,并提出未来研究为解决生态环境治理,绿色创新与产业转型,能源、韧性与可持续发展的可能贡献。

关键词：环境经济地理经济循环 “绿色化”转向演化经济可持续发展

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“鸟起巢中,水出源头”:区域产业动态的碳排放效应

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地理研究 2024年第3期43卷 535-557页

作者：贺舒琪穆恩怡戴晓冕盛涵天贺灿飞北京大学城市与环境学院北京100871 北京大学-林肯研究院城市发展与土地政策研究中心北京100871

在“双碳”目标下,区域产业结构及动态的碳效应成为重要议题。基于中国工商企业注册数据库和CEADs碳排放数据库,实证分析了中国区域产业动态的碳排放效应。研究发现:(1)中国的区域碳排放格局具有明显的空间分异性,呈现“北高南低”以及... 详细信息

在“双碳”目标下,区域产业结构及动态的碳效应成为重要议题。基于中国工商企业注册数据库和CEADs碳排放数据库,实证分析了中国区域产业动态的碳排放效应。研究发现:(1)中国的区域碳排放格局具有明显的空间分异性,呈现“北高南低”以及向大中城市簇状聚集的分布格局。(2)不同要素密集型产业具有异质性碳排放效应。资本密集型及知识密集型产业的进入有利于城市减少碳排放;资源密集型以及劳动力密集型产业具有比较优势的城市会产生更多的碳排放。具体而言,煤炭开采和洗选业、金属制品业等产业进入对区域碳排增长有显著正向影响。(3)政府推动下的清洁化生产与数字化转型能够削减产业动态的碳排增长效应,其调节效应同样存在产业异质性。相关研究成果对“双碳”目标下中国区域产业转型与高质量发展具有一定的指导意义。

关键词：碳排放区域产业动态产业结构产业异质性

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企业人才竞争力的空间分异特征及驱动因素研究——以江苏省工业企业为例

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管理现代化 2020年第6期40卷 104-110页

作者：杨洋黄晶刘文逸刘钢穆恩怡河海大学管理科学研究所江苏南京211100 天津大学管理与经济学部天津300072 剑桥大学土地经济学院英国剑桥CB21TN

人才竞争力已经成为当前企业发展乃至实体经济发展模式转型升级的关键动力。文章在构建人才竞争力评价模型的基础上,以江苏省工业企业为例,基于探索性空间数据分析法,研究企业人才竞争力空间分异特征,并通过空间回归分析模型探究,影响... 详细信息

人才竞争力已经成为当前企业发展乃至实体经济发展模式转型升级的关键动力。文章在构建人才竞争力评价模型的基础上,以江苏省工业企业为例,基于探索性空间数据分析法,研究企业人才竞争力空间分异特征,并通过空间回归分析模型探究,影响企业人才竞争力的外部环境因素。研究结果表明:(1)江苏省企业人才竞争力总体呈现出苏南>苏中>苏北的特征;(2)江苏省企业人才竞争力水平存在显著的空间集聚特征,其中高值聚集在南京、无锡、苏州地区,低值聚集在淮安、宿迁、盐城、徐州地区;(3)地区的经济水平和教育水平是影响各个地区企业人才竞争力的重要因素,近年来政府干预度和区域开放水平也对企业人才竞争力产生重要影响。

关键词：人才竞争力评价空间分异特征空间回归分析

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生态优先视角下跨流域预留水权确权与配置

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南水北调与水利科技（中英文） 2020年第5期18卷 13-37页

作者：吴蓉王慧敏刘钢黄晶穆恩怡河海大学管理科学研究所南京210098 河海大学水文水资源与水利工程科学国家重点实验室南京210098 河海大学沿海开发与保护协同创新中心南京210098 剑桥大学土地经济学院英国剑桥CB21TN

在生态优先、绿色发展前提下,提出生态需水差分整合移动平均自回归预测模型(autoregressive integrated moving average model,ARIMA),据此在生态需水确权的基础上进行流域预留水权确权,并在水权确权的基础上探索水权期权交易模式下预... 详细信息

在生态优先、绿色发展前提下,提出生态需水差分整合移动平均自回归预测模型(autoregressive integrated moving average model,ARIMA),据此在生态需水确权的基础上进行流域预留水权确权,并在水权确权的基础上探索水权期权交易模式下预留发展水权再配置方案,实现跨流域水资源优化配置的同时规避水权买卖双方风险,为跨流域特殊水权的确权与再配置提供参考。研究表明:受气候、政策的影响区域生态需水量呈现出较大变化;南水北调中线受水区天津和河北不具备自备预留发展水量的能力,需要依靠流域调度中心的统一协调;流域调度中心可以根据预测年预留发展水量的使用风险情况进行价格方案的灵活配置,实现预留发展水量经济与社会效益的最优化。

关键词：生态优先跨流域预留水权水权期权南水北调中线

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3D TEM study on hollow α-Fe2O3 nanostructures and nanorings

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Progress in Natural Science:Materials International 2019年第6期29卷 685-689页

作者： Ming Lin enyi Ye Jia Zhang Institute of Materials Research and Engineering A*STAR (Agency for Science Technology and Research) Institute of High Performance Computing A*STAR (Agency for Science Technology and Research)

Controlled synthesis of hollow structures with non-spherical holes is significant in fabricating nanomaterials with well-defined geometries and specific catalytic and electrochemical properties. Here we report the synthesis of uniform hexagonal bipyramid hematite(α-Fe2O3) nanoparticles with hollow and faceted interior via directional etching process in solution. The delicate hollow structures were investigated by electron tomography and growth mechanism was revealed unambiguously. The three-dimensional visualization demonstrates the outside surfaces of hematite particles are enclosed by six {104} and twelve {113} planes, due to the stabilizing effect of the F-anions on the exposed surfaces. The concurrent etching process is a reverse process of crystal growth and leads to the dissolution occurring at the edges and tips of the hexagonal bipyramid particles, resulting in the perforated crystals with exposed {102} internal facets or overetched nanorings with hexagonal *** nanoscale growth and etching process still strictly follows the bulk crystal growth mechanism, thus shedding light on the synthesis of other nanoparticle with controlled morphologies and porous structures.

关键词： Tomography Hexagonal bipyramid Dissolution Facet control Phase transformation

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SFD-AGC algorithm with ADC digitalizing bit fully utilized and stable PAR

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The Journal of China Universities of Posts and Telecommunications 2017年第5期24卷 8-15页

作者： Wang Jie Hu Xiaoguang Guan enyi Ding Zhushun Yao Yidong Li Wen School of Automation Science and Electrical Engineering Beihang University Beijing 100191 China Beijing Institute of Aerospace Control Devices Beijing 100039 China

Aiming at making full use of analog to digital converter （ADC） digitalizing bit without oversaturation while keeping peak to average ratio （PAR） stable, this paper puts forward a new segmented full-digital （SFD）-automatic gain control （AGC） algorithm for a new long term evolution （LTE） communication system. Segmented digital gain control strategy is adopted to adjust the gain by only one step based on detected power status. Whether the gain needs to be adjusted is determined by current signal state derived from the change ranges of adjacent root mean square （RMS） of input signal, but not the difference between the power level of current signal and target signal. Software simulation and hardware implementing had been conducted with LTE frequency division dual （FDD） uplink signal and the results indicated that the proposed AGC algorithm can judge power status accurately and hence adjust the gain precisely in one step with a short delay, further, it can make full use of ADC digitalizing bit without oversaturation as well as keeping stable PAR. In addition, the mean error vector magnitude （EVM） was confined less than 1.6% to meet the 3rd generation partnership project （3GPP） standard well.

关键词： digitalizing bit stable PAR full-digital segmented AGC LTE FDD EVM

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Segmentation multi-dimensional crest factor reduction for multi-service supporting digital radio over fibre system

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The Journal of China Universities of Posts and Telecommunications 2018年第2期25卷 10-22页

作者： Wang Jie Tao Xiuli Hu Xiaoguang Guan enyi Ding Zhushun Li Wen School of Automation Science and Electrical Engineering Beihang University Beijing 100191 China Communication Technology Research Division Beijing Institute of Aerospace Control Devices Beijing 100039 China Fifth Technology Department Beijing Aerospace Times Optical-Electronic Technology Company Limited Beijing 100039 China

A segmentation multi-dimensional crest factor reduction （SMD-CFR） algorithm is proposed for multi-service supporting digital radio over fibre （DRoF） system. Benefit from segmentation dynamic clipping threshold and clipping factor got basing on characteristics of all service bands, the SMD-CFR is able to get better peak clipping and peak to average power ratio （PAPR） reduction for multi-band combined signal. Simulation results show that SMD-CFR gets more than 2.3 reduction in PAPR for two-bands combined signal of long term evolution （LTE） , which is much better than traditional one dimensional （1D）-CFR. Meanwhile, for 64-quadrature amplitude modulation （QAM） modulation and demodulation link, it has very small effect on bit error rate （BER） and error vector magnitude （EVM） , which are controlled less than 0. 1% and 0.2% respectively. For hardware experiment, SMD-CFR obtains 4.5% increase in drain efficiency and about 4 dBc increase in adjacent channel leakage ratio （ACLR）. These are very significant for the wide band power amplifier （PA） in multi-service supporting DRoF system.

关键词： CFR multi-dimensional dynamic crest factor DRoF muhi-service supporting LTE

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Current Research Trends and Perspectives on Solid-State Nanomaterials in Hydrogen Storage

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Research 2021年第1期2021卷 125-163页

作者： Jie Zheng Chen-Gang Wang Hui Zhou enyi Ye Jianwei Xu Zibiao Li Xian Jun Loh Institute of Materials Research and Engineering A^(∗)STAR(Agency for Science Technology and Research)2 Fusionopolis WayInnovis#08-03SingaporeSingapore 138634

Hydrogen energy,with environment amicable,renewable,efficiency,and cost-effective advantages,is the future mainstream substitution of fossil-based ***,the extremely low volumetric density gives rise to the main challenge in hydrogen storage,and therefore,exploring effective storage techniques is key hurdles that need to be crossed to accomplish the sustainable hydrogen *** physically or chemically stored into nanomaterials in the solid-state is a desirable prospect for effective large-scale hydrogen storage,which has exhibited great potentials for applications in both reversible onboard storage and regenerable off-board storage *** attractive points include safe,compact,light,reversibility,and efficiently produce sufficient pure hydrogen fuel under the mild *** review comprehensively gathers the state-of-art solid-state hydrogen storage technologies using nanostructured materials,involving nanoporous carbon materials,metal-organic frameworks,covalent organic frameworks,porous aromatic frameworks,nanoporous organic polymers,and nanoscale *** describes significant advances achieved so far,and main barriers need to be surmounted to approach practical applications,as well as offers a perspective for sustainable energy research.

关键词： mounted attractive substitution

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Effects of Two Potential Allelochemicals on the Photosystem II of Nitzschia closterium and Monostroma nitidum

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Phyton-International Journal of Experimental Botany 2023年第1期92卷 251-269页

作者： Bowen Huang enyi Xie Yu Ran Xinyi Chen Yongjian Huang Jianjun Cui Fishery College Guangdong Ocean UniversityZhanjiang524088China

In aquaculture,high-density seaweed farming brings higher economic benefits but also increases outbreaks of diatom *** effective control of diatom felt in high-density seaweed farming has always been a research *** study selected two potential allelochemicals 2-hydroxycinnamic acid and quinic acid to explore their effects on a diatom Nitzschia closterium and an economic seaweed Monostroma *** results showed that 2-hydroxycinnamic acid had better inhibitory effects than quinic acid on the growth,pigment content and photosynthetic efficiency of *** half-maximal inhibitory concentrations at 120 h(IC_(50–120 h))were 0.9000 and 1.278 mM,***,these allelochemicals had limited inhibitory effects on the growth,pigment content and photosynthetic efficiency of *** before 24 *** further explore the allelopathic effect of these chemicals,this study focused on the photosystem II energy fluxes of *** was found that 3 mM 2-hydroxycinnamic acid could destroy the whole photosynthetic system by devastating the PSII reaction centre(RC)before 24 h;however,the same concentration of quinic acid could only down-regulate the electron transport efficiency by changing the effective antenna size of an active RC and downregulating the PSII reaction centre *** experimental results are expected to provide a new strategy to control diatom felt blooms on the high-density seaweed farming areas.

关键词： Allelochemicals 2-hydroxycinnamic acid quinic acid Nitzschia closterium Monostroma nitidum photosynthetic system

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