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我国生态产品价值实现的研究进展与典型案例剖析

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地球科学进展 2024年第3期39卷 304-316页

作者：张百婷冯起李宗省陆志翔张百娟程文举中国科学院西北生态环境资源研究院祁连山同位素生态水文与国家公园观测站/内陆河流域生态水文重点实验室/甘肃省祁连山生态环境研究中心甘肃兰州730000 中国科学院大学北京100049

生态产品价值实现既是对“两山”理念的践行路径,也是促进我国社会经济发展与生态环境保护并行实践的重要渠道,对全面推动我国经济绿色转型具有重要意义。通过系统梳理已有研究关于生态产品价值实现的成果发现:(1)生态产品相关的研究显... 详细信息

生态产品价值实现既是对“两山”理念的践行路径,也是促进我国社会经济发展与生态环境保护并行实践的重要渠道,对全面推动我国经济绿色转型具有重要意义。通过系统梳理已有研究关于生态产品价值实现的成果发现:(1)生态产品相关的研究显著增加,研究内容不断深入,有效促进了学科交叉融合发展;(2)研究内容涉及生态产品概念辨析及内涵外延、生态产品价值的核算方法、生态产品价值实现的路径和模式、生态产品价值实现的实践探索以及典型案例分析和价值实现的制度保障建设等多个方面。基于此,指出了生态产品价值实现过程中可能存在的困难以及如何确保生态产品价值高效转化等研究难点。通过理论研究的梳理和典型实践探索案例的归纳分析,以期为实现“绿水青山”向“金山银山”转化提供一定借鉴和参考。

关键词：生态产品生态产品价值价值实现路径模式

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Application of geodetector in sensitivity analysis of reference crop evapotranspiration spatial changes in Northwest China

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Research in Cold and Arid Regions 2021年第4期13卷 314-325页

作者： wenju cheng HaiYang Xi Sindikubwabo Celestin Northwest Institute of Eco-Environment and Resources Chinese Academy of SciencesLanzhouGansu 730000China Key Laboratory of Eco-Hydrology of Inland River Basin Chinese Academy of SciencesLanzhouGansu 730000China University of Chinese Academy of Science Beijing 100049China

Reference crop evapotranspiration(ET0)is an important parameter in the research of farmland irrigation management,crop water demand estimation and water balance in scarce data areas,therefore,it is very important to study the factors affecting the spatial variation of *** this paper,the Penman-Monteith formula was used to calculate ET0 which is the dependent variable of elevation(Elev),daily maximum temperature(T_(max)),daily minimum temperature(Tmin),daily average temperature(T_(mean)),wind speed(U_(2)),sunshine duration(SD)and relative humidity(RH).The sensitivity analysis of ET0 was performed using a Geodetector method based on spatial stratified *** applicability of Geodetector in sensitivity analysis of ET0 was verified by comparing it with existing research *** show that RH,Tmax,SD,and Tmean are the main factors affecting ET0 in Northwest China,and RH has the best explanatory power for the spatial distribu‐tion of *** has a unique advantage in sensitivity analysis,because it can analyze the synergistic effect of two factors on the change of *** interactive detector of Geodetector revealed that the synergistic effect of RH and Tmean on ET0 is very significant,and can explain 89%of the spatial variation of *** research provides a new method for sensitivity analysis of ET0 changes.

关键词： reference crop evapotranspiration Penman-Monteith geodetector sensitivity analysis northwest China

Compounding effects of human activities and climatic changes on coexistence of oasis-desert ecosystems:Prioritizing resilient decision-making for a riskier world

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Research in Cold and Arid Regions 2023年第5期15卷 219-229页

作者： XinWei Yin Wei Liu Meng Zhu JuTao Zhang Qi Feng HaiYang Xi LinShan Yang Tuo Han wenju cheng YingQing Su BaiTing Zhang YuanYuan Xue ZeXia Chen LingGe Wang Key Laboratory of Ecohydrology of Inland River Basin Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhouGansu 730000China Key Laboratory of Desert and Desertification Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhouGansu 730000China University of Chinese Academy of Sciences Beijing 100049China College of Geography and Environment Science Northwest Normal UniversityLanzhouGansu 730070China

Water-salt balance is critical for the stable coexistence of salt-affected and groundwater-fed oasis-desert ecosystems. Yet, a comprehensive investigation of how soil salinization and groundwater degradation threaten the coexistence of oasis-desert ecosystems is still scarce, especially under the compounding effects of human activities and climatic changes. Here, we assessed the impacts of irrigated agriculture on hydrological regimes in oasisdesert systems, investigated the spatio-temporal variations of soil salinization in irrigated cropland, and evaluated the implications of the interplays of soil salinization and groundwater degradation on the coexistence of oasis-desert ecosystems in northwestern China, based on meaningful modelling approaches and comprehensive measurements over 1995–2020. The results showed that the irrigation return flow coefficient decreased sharply from 0.21 ± 0.09 in the traditional irrigation period to 0.09 ± 0.01 in the water-saving irrigation period. The continuous drop in groundwater tables and significant degradation of groundwater quality are occurring throughout this watershed. The eco-environmental flows are reaching to their limit with watershed closures(i.e.,the drainage from the oasis region into the desert region is being weakened or even eliminated), although these progressions were largely hidden by regional precipitation and streamflow variability. The process of salt migration and accumulation across different landscapes in oasis-desert system is being reshaped, and soil salinization in water-saving agricultural irrigated lands is accelerating with a regional average annual growth rate of18%. The vegetation in this watershed is degrading, and anthropogenic disturbance accelerates this trend. Our results highlight that environmental stress adaptation strategies must account for resilience maintenance to avoid accelerating catastrophic transitions in oasis-desert ecosystems. Determining the optimal oasis scales and formulatin

关键词： Oasis-desert ecosystems Hydrological regimes Soil salinization Vegetation dynamics Resilient decision-making

Temporal changes in seasonal precipitation over the Sahara Desert from 1979 to 2016

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Research in Cold and Arid Regions 2021年第3期13卷 220-233页

作者： Sindikubwabo Celestin Feng Qi RuoLin Li wenju cheng Jian Ma Habiyakare Telesphore Nzabarinda Vincent Key Laboratory of Eco-hydrology of Inland River Basin Northwest Institute of Eco-Environment and ResourcesChinese Academy of Sciences(CAS)LanzhouGansu 730000China University of Chinese Academy of Sciences Beijing 100049China Qilian Mountains Eco environment Research Center LanzhouGansu 730000China Academy of Water Resources Conservation Forests in Qilian Mountains ZhangyeGansu 734000China

Rainfall variability dominates livelihoods in all countries of Saharan *** better understand the processes involved in Sahara precipitation changes,we used the Global Precipitation Climatology Center(GPCC)dataset to examine dry and wet seasonal trends in the Sahara region from 1979 to *** also used the European Centre for Medium-Range Weather Forecasts(ECMWF)to evaluate the general atmospheric circulation associated with seasonal change of Sahara *** Mann-Kendall test and Theil sens'slope estimator methods were adopted to test and estimate the significance and weight of precipitation trend,*** results revealed that Sahara precipitation has increased *** seasonal evaluation shows a positive trend of 0.42 mm/decade and 1.43 mm/decade in JAS(June,August,and September)seasons for the northern and southern Saharan Desert,***,the JFMA(January,February,March,and April)period shows a negative trend but not statistically *** examination of the general circulation and moisture transport changes suggested an increase of rainfall in southern *** wet period is also driven by northward penetration of moisture originating from the Sahel region,African Easterly Jet(AEJ),and weakening in the upper tropospheric zonal *** rainfall has also been likely associated with positive anomalies of sea surface temperature(SST)in the North Tropical Atlantic(NTA)and the Mediterranean Sea.

关键词： Sahara precipitation variability arid Africa climate

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甘肃省农村饮水安全工程运行管理评价

干旱区研究 2022年第1期39卷 301-311页

作者：姜伟席海洋程文举刘芹甘肃省农村饮水安全管理办公室甘肃兰州730000 中国科学院西北生态环境资源研究院中国科学院内陆河流域生态水文重点实验室阿拉善荒漠生态-水文试验研究站甘肃兰州730000 中国科学院大学北京100049

农村饮水安全工程是实现全面小康的重大民生工程。研究基于统计数据、实地走访和调查问卷,运用熵权法和模糊数学法,对甘肃省农村饮水安全工程运行管理现状进行评价。旨在建立较全面系统且合理长效的评价体系,同时分析目前饮水安全工程... 详细信息

农村饮水安全工程是实现全面小康的重大民生工程。研究基于统计数据、实地走访和调查问卷,运用熵权法和模糊数学法,对甘肃省农村饮水安全工程运行管理现状进行评价。旨在建立较全面系统且合理长效的评价体系,同时分析目前饮水安全工程运行管理中存在的问题。结果表明:(1)甘肃省农村饮水安全工程运行管理状况良好,但是省内地区间差异较大,表现为河西5市的评价结果较好,南部各县(市、区)的评价结果相对较差。(2)对评价等级为"一般"的地区,需要针对政策落实、管理条例更新执行、提升公众维护意识、水管员队伍建设以及供水管道的智能化建设方面进一步优化部署。经过多年的实践探索,甘肃省形成了集中供水工程和分散供水工程并举的特色饮水安全工程建设模式。本研究以期为农村饮水安全工程建设提供切实可行的对策建议,同时也为今后甘肃省乃至全国其他地区的农村饮水安全建设提供技术支撑与科学依据。

关键词：农村饮水安全饮水工程运行管理评价甘肃

Triple reverse order law for the Drazin inverse

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Applied Mathematics(A Journal of Chinese Universities) 2024年第1期39卷 55-68页

作者： WANG Hua ZHONG cheng-cheng College of Sciences Inner Mongolia University of TechnologyHohhot 010051China College of Engineering University of Jinan Quancheng CollegeYantai 265600China

In this paper,we investigate the reverse order law for Drazin inverse of three bound-ed linear operators under some commutation ***,the Drazin invertibility of sum is also obtained for two bounded linear operators and... 详细信息

关键词： Drazin inverse reverse order law space decomposition

Photocatalytic activation of sulfite by N-doped porous biochar/MnFe_(2)O_(4) interface-driven catalyst for efficient degradation of tetracycline

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Green Energy & Environment 2024年第3期9卷 481-494页

作者： Long cheng Yuanhui Ji Jiangsu Province Hi-Tech Key Laboratory for Biomedical Research School of Chemistry and Chemical EngineeringSoutheast UniversityNanjing211189China

A novel photo-catalytic system composed of N-doped biochars(NBCs),MnFe_(2)O_(4) and sulfite activation under ultraviolet(NBCs/MnFe_(2)O_(4)/sulfite/UV)was constructed to realize the efficient eliminate of tetracycline(TC).As the carrier of MnFe_(2)O_(4),NBCs were synthesized from alfalfa,which has large specific surface area,graphite like structure and hierarchical porous *** adsorption isotherm indicated that NBCs/MnFe_(2)O_(4)-2:1 had the best adsorption performance for TC(347.56 mg g^(-1)).Through synergistic adsorption and photocatalysis,the removal rate of TC reached 84%,which was significantly higher than that of MnFe_(2)O_(4).Electrochemical impedance spectroscopy(EIS)and Photoluminescence(PL)characterization results showed that the introduction of NBCs improved the separation efficiency of photogenerated electron and hole pairs and enhanced the photocatalytic ***,the adsorption,degradation mechanism and degradation path of TC by the catalyst were systematically analyzed by coupling HPLC–MS measurement with the theoretical *** the advantages of excellent degradation performance,low cost,easy separation and environmental friendliness of NBCs/MnFe_(2)O_(4),this work was expected to provide a new path for the practical application of biochar.

关键词： Biochar MnFe_(2)O_(4) Sulfite Adsorption Photocatalysis

An improved initial rotor position estimation method using high-frequency pulsating voltage injection for PMSM

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Defence Technology（防务技术） 2024年第3期33卷 19-29页

作者： Yang Jiang Ming cheng School of Electrical Engineering Southeast UniversityNanjing 210096China

High frequency pulsating voltage injection method is a good candidate for detecting the initial rotor position of permanent magnet synchronous ***,traditional methods require a large number of filters,which leads to the deterioration of system stability and dynamic *** order to solve these problems,a new signal demodulation method is proposed in this *** proposed new method can directly obtain the amplitude of high-frequency current,thus eliminating the use of filters,improving system stability and dynamic performance and saving the work of adjusting filter *** addition,a new magnetic polarity detection method is proposed,which is robust to current measurement ***,experiments verify the effectiveness of the method.

关键词： Initial position detection Signal demodulation algorithm Magnetic polarity detection Filter elimination

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河岸缓冲区氮传输及移除机制研究进展

地球科学进展 2022年第10期37卷 1037-1048页

作者：陈雨晴席海洋程文举赵欣悦中国科学院西北生态环境资源研究院中国科学院内陆河流域生态水文重点实验室甘肃兰州730000 中国科学院大学北京100049

作为连接陆域和水域的过渡带,河岸缓冲区在防治水体氮污染方面发挥着重要的生态价值。基于国内外研究成果,重点围绕河岸缓冲区氮迁移路径、移除方式及其比例以及河岸缓冲区不同因素的影响机制等核心问题进行了归纳总结。结果发现:①河... 详细信息

作为连接陆域和水域的过渡带,河岸缓冲区在防治水体氮污染方面发挥着重要的生态价值。基于国内外研究成果,重点围绕河岸缓冲区氮迁移路径、移除方式及其比例以及河岸缓冲区不同因素的影响机制等核心问题进行了归纳总结。结果发现:①河岸缓冲区氮迁移过程包括地表径流、下渗以及河水—地下水相互传输4条路径,氮在河岸缓冲区运移过程中可以通过化学或物理机制消耗转化,消耗率可达到90%以上,河岸缓冲区对于防止水体污染发挥着重要作用;②反硝化作用和植物吸收对氮移除的贡献率分别为5.0%~82.0%和0.6%~59.4%,厌氧氨氧化过程是河岸缓冲区氮移除的重要途径;③通过适当增加河岸缓冲区宽度以及改善植被状况可以提高河岸缓冲区氮移除效率。河岸缓冲区氮移除研究框架已基本构建,但未来仍需从方法和多因素耦合关系等方面进一步深入分析和探究。

关键词：河岸缓冲区氮反硝化植物吸收影响因素