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Responses of soil stoichiometry and soil enzyme activities in the different distance around opencast coal mine of the Hulun Buir Grassland of China

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International Journal of Coal Science & Technology 2024年第1期11卷 221-231页

作者： Yinli Bi Nan Guo yanxu zhang Xianglei Li Ziheng Song State Key Laboratory for Fine Exploration and Intelligent Development of Coal Resources China University of Mining and Technology(Beijing)Beijing100083China Institute of Ecological Environment Restoration in Mine Areas of West China Xi’an University of Science and TechnologyXi’an710054China

The objectives of this study were to explore the changes in soil stoichiometry and enzyme activities at different distances from an opencast coal mine in the Hulun Buir Grassland of China. Four transects were established on north and east sides of the opencast coal mining area, and samples were collected at 50 m, 550 m, and 1550 m from the pit on each transect. Control samples were collected from a grassland station 8 km from the opencast coal mining area that was not disturbed by mining. Four replicate soil samples were collected at each point on the four transects. Soil physicochemical properties and enzyme activities were determined, and correlations between soil properties and stoichiometric ratios and enzyme activities were explored using redundancy analysis. The increase in distance from mining did not significantly affect soil properties, although soil urease activity was significantly lower than that of the control area. Soil properties 1550 m from the mine pit were similar to those at the grassland control. In addition, soil total nitrogen had the greatest effect on soil stoichiometry, and soil total potassium had the greatest effect on soil enzyme activities. Coal dust from opencast mining might be the main factor affecting soil stoichiometry and enzyme activities. The results of this study provide direction for the next step in studying the influence of mining areas on soil properties and processes.

关键词： Opencast coal mine Soil stoichiometry Soil enzyme activities Distance Grassland

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西部煤矿区微生物修复促进植物水分高效利用策略

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煤炭学报 2024年第2期49卷 1003-1010页

作者：毕银丽武超彭苏萍田乐煊张延旭西安科技大学地质与环境学院陕西西安710054 西安科技大学西部矿山生态环境修复研究院陕西西安710054 中国矿业大学(北京)矿山生态修复研究院北京100083

西部煤矿区生态环境脆弱,叠加高强度开采致使水土流失、土壤退化、根系受损,植物水分利用效率低,生态恢复困难,提高水分利用效率成为西部矿区生态修复或重建的关键。土壤水是限制干旱半干旱煤矿区生态修复的关键因素,它连接大气水、地... 详细信息

西部煤矿区生态环境脆弱,叠加高强度开采致使水土流失、土壤退化、根系受损,植物水分利用效率低,生态恢复困难,提高水分利用效率成为西部矿区生态修复或重建的关键。土壤水是限制干旱半干旱煤矿区生态修复的关键因素,它连接大气水、地表水、地下水与植被生长,是水分循环与养分运输的重要载体。土壤水分的高效与合理利用关系到生态修复的成败,因此探究植物根系水分利用策略对于西部煤矿区生态修复具有重要作用。分析了国内外植物水分利用的主要研究方法,比较了不同方法之间的优缺点及相应研究进展。在干旱半干旱煤矿区受损生态环境中,采用植物-微生物联合的微生物修复技术,能提高植物水分利用效率,改善植物水分利用策略。同时,接种微生物降低了植物从浅层土壤吸收水分的比例,有效地增加植物从深层土壤中吸收和利用水分,提升了植物水分利用效率,使接菌植物在干旱半干旱煤矿区表现出更高的生态适应性。分析了目前西部煤矿区植物水分利用的研究进展和存在的问题,探讨了煤矿区微生物修复对水分利用策略的改善,提出了西部干旱煤矿区生态修复中不同植物组合对水分利用策略的影响及其研究重点,为实现矿区绿色可持续、高质量发展奠定了扎实的基础,具有重要的生态应用价值。

关键词：西部煤矿区丛枝菌根真菌植物水分利用策略水同位素技术植被组合

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密闭电石炉智能APC控制设计探究

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今日自动化 2024年第8期 10-12页

作者：张彦旭中国石化长城能源化工(宁夏)有限公司宁夏银川750000

文章着重探讨了密闭电石炉的智能APC控制设计思路,通过对当前电石炉工艺特点和控制需求深入分析,指出现行炉气压力、电极自动控制存在的不足以及对电石炉运行存在的影响,详细阐述了智能化控制系统的设计思路、运行思路,以及后续改进达... 详细信息

文章着重探讨了密闭电石炉的智能APC控制设计思路,通过对当前电石炉工艺特点和控制需求深入分析,指出现行炉气压力、电极自动控制存在的不足以及对电石炉运行存在的影响,详细阐述了智能化控制系统的设计思路、运行思路,以及后续改进达到黑屏操作的方法。

关键词：密闭电石炉智能APC控制炉气压力电极

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基于CloudSim的电力系统计算云原生模型与仿真方法

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电力自动化设备 2024年第9期44卷 189-196,204页

作者：陈元榉刘媛媛张延旭蔡煜胡春潮蔡泽祥南方电网电力科技股份有限公司广东广州510000 华南理工大学电力学院广东广州510000

分析基于云计算的电力系统计算过程是实现资源高效利用的基础。因此,提出一种基于CloudSim的电力系统计算的云原生建模与仿真方法。基于云原生技术阐述了电力系统计算架构的关键要素,提出基于CloudSim的电力系统计算架构的云原生模型,... 详细信息

分析基于云计算的电力系统计算过程是实现资源高效利用的基础。因此,提出一种基于CloudSim的电力系统计算的云原生建模与仿真方法。基于云原生技术阐述了电力系统计算架构的关键要素,提出基于CloudSim的电力系统计算架构的云原生模型,分析电力云任务调配时的资源供需平衡问题。建立基于微服务的电力云任务模型,分析微服务的处理时序逻辑及其层级关系并生成微服务队列。据此提出微服务的动态调配模型,采用微服务-容器映射策略与实体动态整合策略,实现微服务在实体间的动态映射。利用CloudSim进行仿真分析,结果证明所提方法可行且有效,可为电力云计算的资源配置、任务调度等提供基本的仿真工具与方法。

关键词：电力系统 CloudSim 云原生建模电力系统计算架构动态调配时序逻辑微服务队列

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Plant growth and their root development after inoculation of arbuscular mycorrhizal fungi in coal mine subsided areas

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International Journal of Coal Science & Technology 2018年第1期5卷 47-53页

作者： Yinli Bi yanxu zhang Hui Zou State Key Laboratory of Coal Resources and Safe Mining China University of Mining and Technology (Beijing)Beijing 100083 China

Coal mining often cause serious land degradation, soil erosion, and desertification affecting growth of the local vegetation, especially the roots. Arbuscular mycorrhizal fungi （AMF） inoculation is considered a potential biotechnological tool for mined soil remediation because mycorrhizal fungi could improve plant growth environment, especially under adverse conditions due to their good symbiosis. A field experiment was conducted to study the ecological effects of AMF （Funneliformis mosseae, Rhizophagus intraradices） on the growth of Amygdalus pedunculata Pall. and their root development in the regenerated mining subsidence sandy land. The reclamation experiment included four treatments： inoculation of Funneliformis mosseae （F.m）, inoculation of Rhizophagus intraradices （R.i）, combined inoculation of F.m and R.i and non-inoculated treatment. Root mycorrhizal colonization, plant height, crown width, soil moisture, root morphology and certain soil properties were assessed. The results showed that AMF improved the shoot and root growth of Amygdalus pedunculata Pall., and significantly increased root colonization after 1 year of inoculation. Available phosphorus content, activities of phosphatase as well as electrical conductivity in soil rhizosphere of all the three inoculation treatments were higher than that of the non-inoculated treatment. AMF increased the quantity of bacteria and fungi in soil rhizosphere compared with the non-inoculated treatment. Our study indicates that revegetation with AMF inoculum could influence plant growth and root development as well as soil properties, suggesting that AMF inoculation can be effective method for further ecological restoration in coal mine subsided areas.

关键词： Arbuscular mycorrhizal fungi Plant growth Root development Soil remediation Amygdalus pedunculata Pall

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基于环境DNA宏条形码技术的克拉里昂-克利珀顿区鱼类多样性

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应用海洋学学报 2024年第3期43卷 429-441页

作者：何韦宜黄浩王磊欧丹云张延续李伟文自然资源部第三海洋研究所海洋生态保护与修复重点实验室福建厦门361005

海洋鱼类长期遭受过度捕捞的影响,导致生物多样性丧失。在公海区域鱼类多样性研究常用传统的调查方法,该方法主要用于商业物种的调查。环境DNA(eDNA)已成功用于监测水生环境中的生物多样性,本研究通过eDNA宏条形码技术,监测采矿前东太... 详细信息

海洋鱼类长期遭受过度捕捞的影响,导致生物多样性丧失。在公海区域鱼类多样性研究常用传统的调查方法,该方法主要用于商业物种的调查。环境DNA(eDNA)已成功用于监测水生环境中的生物多样性,本研究通过eDNA宏条形码技术,监测采矿前东太平洋克拉里昂-克利珀顿区(CC区)的鱼类多样性信息。通过使用两种鱼类通用引物(MiFish、COⅠ)获取CC区的鱼类多样性,共检测出140属、132种鱼类,随水深增加,物种检出率逐渐降低。其中,基于MiFish引物的eDNA宏条形码技术鉴定出2纲、35目、62科、88属、57种鱼类。基于COⅠ引物的共鉴定出2纲、29目、57科、72属、87种鱼类。基于COⅠ引物的检测出濒临灭绝物种有日本鳗鲡(Anguilla japonica)、美洲鳗鲡(Anguilla rostrata)、豹纹窄尾魟(Himantura uarnak)、褐背蝠鲼(Mobula tarapacana);极度濒危物种有欧洲鳗鲡(Anguilla anguilla);易危物种有大西洋蓝枪鱼(Makaira nigricans)、扁鲹(Pomatomus saltatrix);近危物种有大青鲨(Prionace glauca)。基于MiFish引物的检测出近危物种有大青鲨、龙头鱼(Harpadon nehereus)、尖头斜齿鲨(Scoliodon laticaudus),易危物种有褐点石斑(Epinephelus fuscoguttatus)。MiFish引物检测到的鱼类科、属数量高于COⅠ引物的检测结果,针对OTU序列的属及以上的分类具有高效的覆盖率和分辨率。研究结果表明,eDNA宏条形码技术可以有效鉴定鱼类物种,在海洋鱼类多样性监测中具有良好的应用前景。eDNA宏条形码技术作为一种非侵入性方法,监测到的鱼类多样性远高于深海生物诱捕观测器捕获的鱼类多样性,同时基于MiFish引物的eDNA宏条形码技术监测鱼类物种更具优势。

关键词：海洋生物学鱼类多样性环境DNA 克拉里昂-克利珀顿区东太平洋

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Role of the different planting age of seabuckthorn forests to soil amelioration in coal mining subsidence land

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International Journal of Coal Science & Technology 2014年第2期1卷 192-197页

作者： Yinli Bi yanxu zhang School of Geoscience and Surveying Engineering China University of Mining and Technology(Beijing)Beijing 100083China

To investigate the effects of seabuckthorn(Hippophae rhamnoides)on soil amelioration,using the space replacement method,soil physical and chemical indexes as well as the microorganism quantity and soil enzyme activities were *** results showed that:the soil bulk density of surface soil decreased and soil porosity and field capacity increased after afforestation with *** plant was found to effectively reduce the soil pH,increase the soil conductivity,soil organic matters and available *** microorganism quantity,soil enzyme activities were both higher in 0-20 cm layer than in 20-40 cm *** the increase years of remediation with seabuckthorn,the quantity of soil microorganism and enzyme activities were increasing to a higher level 5 to 8 years *** study indicates that seabuckthorn can effectively improve soil physical and chemical properties,increase the quantity of soil microorganisms and enzyme activities,which is of great significance for the ecosystem restoration in mining areas.

关键词： Coal mining subsidence land Seabuckthom plantation Rhizosphere soil Soil amelioration

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A soft actor-critic deep reinforcement learning method for multi-timescale coordinated operation of microgrids

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Protection and Control of Modern Power Systems 2022年第1期7卷 423-432页

作者： Chunchao Hu Zexiang Cai yanxu zhang Rudai Yan Yu Cai Bowei Cen School of Electric Power South China University of TechnologyGuangzhouChina China Southern Power Grid Electrical Technology Co. LTDGuangzhouChina Guangdong Provincial Key Laboratory of New Technology for Smart Grid GuangzhouChina School of Electrical and Electronic Engineering Nanyang Technological UniversitySingaporeSingapore School of Electrical and Electronic Engineering South China University of TechnologyGuangzhou 510640China.

This paper develops a multi-timescale coordinated operation method for microgrids based on modern deep rein-forcement *** the complementary characteristics of different storage devices,the proposed approach achieves multi-timescale coordination of battery and supercapacitor by introducing a hierarchical two-stage dispatch *** first stage makes an initial decision irrespective of the uncertainties using the hourly predicted data to minimize the operational *** the second stage,it aims to generate corrective actions for the first-stage decisions to compensate for real-time renewable generation *** first stage is formulated as a non-convex deterministic optimization problem,while the second stage is modeled as a Markov decision process solved by an entropy-regularized deep reinforcement learning method,i.e.,the Soft *** Soft Actor-Critic method can efficiently address the exploration-exploitation dilemma and suppress *** improves the robustness of *** results demonstrate that different types of energy storage devices can be used at two stages to achieve the multi-timescale coordinated *** proves the effectiveness of the proposed method.

关键词： Microgrid operation Hybrid energy storage system Deep reinforcement learning

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Arbuscular mycorrhizal fungi ameliorate the chemical properties and enzyme activities of rhizosphere soil in reclaimed mining subsidence in northwestern China

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Journal of Arid Land 2019年第1期11卷 135-147页

作者： QIU Lang BI Yinli JIANG Bin WANG Zhigang zhang yanxu Yryszhan ZHAKYPBEK State Key Laboratory of Coal Resources and Safe Mining China University of Mining and Technology (Beijing) College of Geoscience and Surveying Engineering China University of Mining and Technology (Beijing) Satbayev University

In semi-arid region of northwestern China, underground mining subsidence often results in decreased vegetation coverage, impoverishment of soil fertility and water stress. In addition, the physical-chemical and biological properties of soil also change, resulting in more susceptible to degradation. In particular, subsidence causes disturbance of the symbioses of plant and microbe that can play a beneficial role in the establishment of vegetation communities in degraded ecosystems. The objective of this study was to evaluate the effects of revegetation with exotic arbuscular mycorrhizal fungi(AMF) inoculum on the chemical and biological properties of soil over time in mining subsidence areas. Soils were sampled at a depth up to 30 cm in the adjacent rhizosphere of Amorpha fruticose Linn. from five reclaimed vegetation communities in northwestern China. In August 2015, a field trial was set up with five historical revegetation experiments established in 2008(7-year), 2011(4-year), 2012(3-year), 2013(2-year) and 2014(1-year), respectively. Each reclamation experiment included two treatments, i.e., revegetation with exotic AMF inoculum(AMF) and non-AMF inoculum(the control). Root mycorrhizal colonization, glomalin-related soil protein(GRSP), soil organic carbon(SOC), soil nutrients, and enzyme activities were also assessed. The results showed that mycorrhizal colonization of inoculated plants increased by 33.3%–163.0% compared to that of non-inoculated plants(P<0.05). Revegetation with exotic AMF inoculum also significantly improved total GRSR(T-GRSP) and easily extracted GRSP(EE-GRSP) concentrations compared to control, besides the T-GRSP in 1-year experiment and the EE-GRSP in 2-year experiment. A significant increase in SOC content was only observed in 7-year AMF reclaimed soils compared to non-AMF reclaimed soils. Soil total N(TN), Olsen phosphorus(P) and available potassium(K) were significantly higher in inoculated soil after 1–7 years of reclamation(except for in

关键词： revegetation mycorrhizal colonization glomalin-related soil proteins arbuscular mycorrhizal fungi coal mining Amorpha fruticose

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Propagation Delay Measurement and Compensation for Sampled Value Synchronization in a Smart Substation

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CSEE Journal of Power and Energy Systems 2017年第2期3卷 196-202页

作者： yanxu zhang Zexiang Cai Xiaohua Li Ruiwen He School of Electric Power Engineering South China University of TechnologyGuangzhou 510640China School of Automation Guangdong University of TechnologyGuangzhou 510006China

Reliable sampled value(SV)synchronization is used to ensure the reliability of protective relaying in a smart substation based on IEC *** this paper,an SV synchronization method based on SV propagation delay measurement and compensation is *** method does not depend on an external reference clock and has higher reliability than existing *** core issue in the proposed method is to measure the switching *** following steps are undertaken in this work:First,the composition of SV propagation delay in a smart substation is ***,a new switch with the capability of switching delay measuring and recording is ***,two laboratory tests are conducted to study the measurement accuracy of the switching ***,an SV synchronization method is presented and its application is tested on a busbar protection system to demonstrate that the proposed method can achieve SV synchronization *** results show that the measurement is sufficiently accurate for the SV propagation delay *** proposed method also shows that the reliability of the protective relaying in a smart substation is significantly improved.

关键词： Delay compensation propagation delay sampled value smart substation

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