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Facet-dependent activation of oxalic acid over hematite nanocrystals under the irradiation of visible light for efficient degradation of pollutants

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Journal of Environmental Sciences 2024年第8期142卷 204-214页

作者： Zhixiong Yang Yuan li Xiaotian Wang jiaming li Jiquan Wang Gaoke Zhang Hubei Key Laboratory of Mineral Resources Processing and Environment State Key Laboratory of Silicate Materials for ArchitecturesWuhan University of TechnologyWuhan 430070China Hubei Engineering Consulting Co. Ltd.Wuhan 430071China

Naturally occurring hematite has been widely studied in the Fenton-like system for water pollutant remediation due to its abundance and ***,its inadequate catalytic activity results in difficulty in effectively degrading pollutants in the catalytic degradation system that it ***,we constructed a photochemical system composed of hematite with{001}facet of high activity facet and low-cost and non-toxic oxalic acid(OA)for the removal of various types of *** removal rate for the degradation of metronidazole,tetracycline hydrochloride,Rhodamine B,and hexavalent chromium by hematite nanoplate with the exposed{001}facet activating OA under visible light irradiation was 4.75,2.25,2.33,and 2.74 times than that by the exposed{110}facet,*** functional theory(DFT)calculation proved that the OA molecule was more easily adsorbed on the{001}facet of hematite than that on the{110}facet,which would favor the formation of the more Fe(Ⅲ)-OA complex and reactive *** addition,the reactive site of metronidazole for the attraction of radicals was identified on the basis of the DFT calculation on the molecular occupied orbitals,and the possible degradation pathway for metronidazole included carbon chain fracture,hydroxyethyl-cleavage,denitrogenation,and ***,this finding may offer a valuable direction in designing an efficient iron-based catalyst based on facet engineering for the improved activity of Fenton-like systems such as OA activation.

关键词： Hematite Facet exposure Oxalic acid activation Fenton-like system Pollutant removal

Integrated Frequency-constrained Scheduling Considering Coordination of Frequency Regulation Capabilities from Multi-source Converters

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Journal of Modern Power Systems and Clean Energy 2024年第1期12卷 261-274页

作者： jiaming li Ying Qiao Zongxiang Lu Wei Ma Xin Cao Rongfu Sun the Department of Electrical Engineering Tsinghua UniversityBeijing 100084China the China Suntien Green Energy limited Company Shijiazhuang 050011China the State Grid Jibei Electric Power Company Beijing 100054China

As the proportion of renewable energy(RE)increases,the inertia and the primary frequency regulation(FR)capability of the power system ***,ensuring frequency security in the scheduling model has become a new technical requirement in power systems with a high share of *** to a shortage of conventional synchronous generators,the frequency support of multi-source converters has become an indispensable part of the system frequency resources,especially variable-speed wind turbine generation(WTG)and battery energy storage(BES).Quantitative expression of the FR capability of multi-source converters is necessary to construct frequency-constrained scheduling ***,the frequency support performance of these converter-interfaced devices is related to their working states,operation modes,and parameters,and the complex coupling of these factors has not been fully exploited in existing *** this study,we propose an integrated frequency-constrained scheduling model considering the coordination of FR capabilities from multi-source *** FR control strategies and variable FR parameters for WTG with or without reserved power are modeled,and multi-target allocation of BES capacity between tracking dispatch instruction and emergency FR is ***,the variable FR capabilities of WTG and BES are embedded into the integrated frequency-constrained scheduling *** nonlinear constraints for frequency security are precisely linearized through an improved iteration-based *** effectiveness of the proposed model is verified in a modified IEEE 24-bus standard *** results suggest that the coordinated participation of BES and WTG in FR can effectively reduce the cost of the scheduling model while meeting frequency security constraints.

关键词： Battery energy storage(BES) wind turbine generation(WTG) frequency regulation(FR) frequency security power system scheduling

Deep-Ensemble Learning Method for Solar Resource Assessment of Complex Terrain Landscapes

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Energy Engineering 2024年第5期121卷 1329-1346页

作者： lifeng li Zaimin Yang Xiongping Yang jiaming li Qianyufan Zhou Ping Yang Energy Development Research Institute China Southern Power GridGuangzhou510000China Corporate Headquarters China Southern Power GridGuangzhou510000China Guangdong Green Energy Key Laboratory South China University of TechnologyGuangzhou510000China

As the global demand for renewable energy grows,solar energy is gaining attention as a clean,sustainable energy *** assessment of solar energy resources is crucial for the siting and design of photovoltaic power *** study proposes an integrated deep learning-based photovoltaic resource assessment *** learning and deep learning methods are fused for photovoltaic resource assessment for the first *** proposed method combines the random forest,gated recurrent unit,and long short-term memory to effectively improve the accuracy and reliability of photovoltaic resource *** proposed method has strong adaptability and high accuracy even in the photovoltaic resource assessment of complex terrain and *** experimental results show that the proposed method outperforms the comparison algorithm in all evaluation indexes,indicating that the proposed method has higher accuracy and reliability in photovoltaic resource assessment with improved generalization performance traditional single algorithm.

关键词： Photovoltaic resource assessment deep learning ensemble learning random forest gated recurrent unit long short-term memory

Impact of sedimentary environmental evolution on organic matter enrichment in Upper Paleozoic marine–continental transitional shales in the Shenfu Block， eastern Ordos Basin， China: evidence from geochemistry

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Journal of Earth Science 2024年

作者： Zhang Yanchao Yin Xiangdong Jiang Shu Ma litao li jiaming School of Geoscience and Technology， Southwest Petroleum University School of Sustainable Energy， China University of Geosciences Wuhan EnerTech-Drilling & Production Co.，CNOOC Ltd

The shale gas exploration of marine-continental transitional facies has gained great attention in China， which is viewed as another breakthrough following the marine shale gas prior to continental shale gas. The Upper Paleozoic marine-continental transitional shales have high TOC abundance with large total thickness in the eastern Ordos Basin， progressively becoming a favorable area for exploration of transitional shale gas. Nevertheless， compared with the relatively homogeneous marine shales， the marine-continental transitional shales demonstrated strong anisotropy in the aspects of thickness， lithology and organic matter (OM). Thus， in this paper， based on the trace element and rock-eval data， we investigated the sedimentary facies， provenance， paleoclimate， paleobathymetry， and redox condition， as well as their controls on the enrichment of organic matter in the Shenfu Block， eastern Ordos basin. The results of trace element experiments indicate that the paleoenvironment of the Ordos Basin underwent a transition from a marine to a continental environment， evolving from the Benxi Formation of the Carboniferous system to the Upper Shihezi Formation of the Permian system. The provenance area is characterised by the presence of high iron and high magnesium feldspar， with a medium degree of weathering. The paleoclimate experienced alternating periods of dry heat， relatively warm wet conditions， and dry heat. The paleowater depth decreased along the sedimentary profile. With regard to the REDOX environment index， the Taiyuan Formation is the stratum exhibiting the highest degree of reduction. The detection criteria for biomarkers were found to be consistent with the inorganic geochemical characteristics. The relationship between various trace elements and TOC indicates that redox conditions are the primary factors influencing the accumulation of organic matter in transitional shale. Organic matter is more abundant in warm and humid marine and terrestrial environments t

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Genomic selection of eight fruit traits in pear

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Horticultural Plant Journal 2024年第2期10卷 318-326页

作者： Manyi Sun Mingyue Zhang Satish Kumar Mengfan Qin Yueyuan liu Runze Wang Kaijie Qi Shaoling Zhang Wenjing Chang jiaming li Jun Wu College of Horticulture State Key Laboratory of Crop Genetics&Germplasm Enhancement and UtilizationNanjing Agricultural UniversityNanjingJiangsu 210095China State Key Laboratory of Crop Biology College of Horticulture Science and EngineeringShandong Agricultural UniversityTai'anShandong 271018China The New Zealand Institute for Plant and Food Research limited Private Bag 1401Havelock North 4157New Zealand Zhongshan Biological Breeding Laboratory NanjingJiangsu 210014China

Genomic selection (GS) has the potential to improve selection efficiency and shorten the breeding cycle in fruit tree breeding. In this study,we evaluated the effect of prediction methods, marker density and the training population (TP) size on pear GS for improving its performance and reducing cost. We evaluated GS under two scenarios:(1) five-fold cross-validation in an interspecific pear family;(2) independent validation. Based on the cross-validation scheme, the prediction accuracy (PA) of eight fruit traits varied between 0.33 (fruit core vertical diameter)and 0.65 (stone cell content). Except for single fruit weight, a slightly better prediction accuracy (PA) was observed for the five parametrical methods compared with the two non-parametrical methods. In our TP of 310 individuals, 2 000 single nucleotide polymorphism (SNP) markers were sufficient to make reasonably accurate predictions. PAs for different traits increased by 18.21%-46.98%when the TP size increased from 50to 100, but the increment was smaller (-4.13%-33.91%) when the TP size increased from 200 to 250. For independent validation, the PAs ranged from 0.11 to 0.45 using rrBLUP method. In summary, our results showed that the TP size and SNP numbers had a greater impact on the PA than prediction methods. Furthermore, relatedness among the training and validation sets, and the complexity of traits should be considered when designing a TP to predict the test panel.

关键词： Pear Pyrus Prediction method TP size SNP marker number

增值税进项留抵下的增值税税率与企业资产配置优化

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系统工程理论与实践 2024年第3期44卷 1034-1052页

作者：李嘉明李毅博刘渝琳重庆大学经济与工商管理学院重庆400030 重庆大学公共管理学院重庆400030 重庆大学公共经济与公共政策研究中心重庆400030

文章选取增值税进项留抵视角,考虑企业在增值税税率下调政策带来的税负效应和税收红利共享(或税负转嫁)效应下如何优化资产配置.税收红利共享(或税负转嫁)可影响以下价格组合:(i)不含(增值)税销售价格、购买价格;(ii)不含(增值)税销售... 详细信息

文章选取增值税进项留抵视角,考虑企业在增值税税率下调政策带来的税负效应和税收红利共享(或税负转嫁)效应下如何优化资产配置.税收红利共享(或税负转嫁)可影响以下价格组合:(i)不含(增值)税销售价格、购买价格;(ii)不含(增值)税销售价格、含(增值)税购买价格;(iii)含(增值)税销售价格、不含(增值)税购买价格;(iv)含(增值)税销售价格、购买价格.研究发现:1)销项税率下调:规模报酬递减下,企业会增多投资资本与劳动力,减少投资金融资产,否则相反;2)进项税率下调:情形(i)下,规模报酬递增且金融资产预期回报率低于附加税税率或规模报酬递减且金融资产预期回报率高于附加税税率下,企业会增多投资资本与劳动力,否则相反;情形(ii)∼(iv)下,规模报酬递减时,企业会减少投资资本与劳动力,增多投资金融资产,否则相反;3)增值税销、进项税率同时下调:情形(i)、(iii)下,规模报酬递增且金融资产预期回报率高于附加税税率时,企业会减少投资资本与劳动力,增多投资金融资产;规模报酬递减且金融资产预期回报率高于附加税税率时,企业会增多投资资本与劳动力.文章使用制造业等相关数据,模拟四种价格组合增值税税率与资产配置优化的关系以回证结论;文章也使用我国2016–2021年A股上市公司数据,发现实证结果也回证了结论.而在我国规模报酬递减的现行国情下,文章也从企业微观行为说明下调增值税税率的原因.

关键词：增值税进项留抵增值税税率下调税收红利共享(或税负转嫁) 销售、购买价格资产配置优化

“十五五”期间我国城市化地区发展的战略重点

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中国科学院院刊 2024年第4期39卷 651-662页

作者：戚伟樊杰李佳洺李宇中国科学院地理科学与资源研究所北京100101 中国科学院大学资源与环境学院北京100049

城市化地区是以提供工业品和服务产品为主体功能的地区。“十五五”期间,我国人口城镇化率将超过70%,从此进入长时期高位城镇化水平阶段。城市化地区的战略定位将聚焦为科技创新资源高度集聚、新质生产力和新型工业化重点布局的县级行... 详细信息

城市化地区是以提供工业品和服务产品为主体功能的地区。“十五五”期间,我国人口城镇化率将超过70%,从此进入长时期高位城镇化水平阶段。城市化地区的战略定位将聚焦为科技创新资源高度集聚、新质生产力和新型工业化重点布局的县级行政区。在战略布局上,优化城市化地区范围,推进人口和经济向城市群、都市圈和中心城市集聚,加强超大、特大等城市郊区化和城乡融合发展,推进以县城为重要载体的城镇化建设。在功能提升上,按照比较优势因地制宜推进不同城市化地区的新质生产力和新型工业化布局,强化京津冀、长三角、珠三角、成渝等城市化地区的引领作用。在空间品质上,推进城市宜居性、智慧化和韧性化建设。

关键词：城市化地区新质生产力新型工业化主体功能区城市群都市圈

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建立服务新发展格局的内通外联网络化国土空间格局

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中国科学院院刊 2024年第4期39卷 702-713页

作者：李佳洺王姣娥中国科学院地理科学与资源研究所北京100101 中国发展战略学研究会城市与区域发展战略专业委员会北京100049

以重大战略通道为主的网络化国土空间格局是构建“双循环”新发展格局的重要支撑。业已形成的“两横三纵”重大战略通道能够有效促进经济社会要素向主要城市群地区集聚。但是,以南北联通为主的纵向战略通道与东西向经济社会联系及交通... 详细信息

以重大战略通道为主的网络化国土空间格局是构建“双循环”新发展格局的重要支撑。业已形成的“两横三纵”重大战略通道能够有效促进经济社会要素向主要城市群地区集聚。但是,以南北联通为主的纵向战略通道与东西向经济社会联系及交通通道等不匹配、不协同;同时,还存在京津冀城市群横向支撑不足、陆海通道横向带动作用较弱、与对外通道衔接不够等问题。未来应构建“三横三纵”重大战略通道,实现国内战略通道与对外通道融合,加强横贯中西的横向战略通道建设,发挥好沿海城市群对中西部的带动作用,支撑主体功能区战略优化,形成网络化陆域空间格局。

关键词：新发展格局重大战略通道主体功能区战略国土空间格局

Isolation and Experimental Study on Bacteriostasis of Bacillus haynesii

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Journal of Clinical and Nursing Research 2024年第7期8卷 219-227页

作者： Jiedan liao Mengbo Yu jiaming li Zhiheng Xie Wanjun Gu Shuzhen Zhou Yi Ma College of Animal Science and Technology Foshan UniversityFoshan 528225Guangdong ProvinceChina Foshan City Nanhai Eastern Along Pharmaceutical Co. LtdFoshan 528234Guangdong ProvinceChina Department of Veterinary Medicine College of Coastal Agricultural SciencesGuangdong Ocean UniversityZhanjiang 524088Guangdong ProvinceChina

This experiment aims to isolate and inhibit three bacteria strains to provide candidate strains for the development and application of *** bacterial morphological identification,16S rDNA sequence alignment,and genetic evolution analysis,three strains were identified as Bacillus haynesii,named HP01,HD02,and *** biosurfactant activity tests,C-TAB tests,hemolysis tests,and antibacterial activity analyses,the results showed that all three strains of *** exhibited significant biosurfactant ***,the solutions of the three strains demonstrated a pronounced antibacterial effect on Staphylococcus *** resistance and safety of commonly used drugs were evaluated using the tablet diffusion method and a mouse feeding *** results indicated that the three strains were not resistant to commonly used antibacterial drugs,and the oral bacterial solution was not pathogenic and had high safety in *** study concluded that all three *** strains met the basic conditions for use,with *** HP01 being the most promising candidate.

关键词： Bacillus haynesii Separation identification Antibacterial activity Safety