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Journal of Central South University 2024年第8期31卷 2872-2890页

作者： Wang, Meng guo, Ping-ye Jin, Xin Dang, Guan-jie guo, yi-chen Li, yi State Key Laboratory for Tunnel Engineering China University of Mining and Technology-Beijing Beijing China School of Mechanics and Civil Engineering China University of Mining and Technology-Beijing Bgijing China

Every year in China, a significant number of mines are closed or abandoned. The pumped hydroelectric storage (PHS) and geothermal utilization are vital means to efficiently repurpose resources in abandoned mine. In this work, the development potentials of the PHS and geothermal utilization systems were evaluated. Considering the geological conditions and meteorological data available of Jiahe abandoned mine, a simple evaluation model for PHS and geothermal utilization was established. The average efficiency of the PHS system exceeds 70% and the regulatable energy of a unit volume is over 1.53 kW·h/m3. The PHS system achieves optimal performance when the wind/solar power ratio reaches 0.6 and 0.3 in daily and year scale, respectively. In the geothermal utilization system, the outlet temperature and heat production are significantly affected by the injection flow rate. The heat production performance is more stable at lower rate flow, and the proportion of heat production is higher in the initial stage at greater flow rate. As the operating time increases, the proportion of heat production gradually decreases. The cyclic heat storage status has obvious advantages in heat generation and cooling. Furthermore, the energy-saving and emission reduction benefits of PHS and geothermal utilization systems were calculated.

关键词： abandoned mine underground reservoir wind/solar energy pumped hydroelectric storage geothermal

东江河源段表层水体及鱼类肠道中的微塑料污染特征

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水生态学杂志 2024年第5期45卷 159-169页

作者：李敏倩董文亮郭翊宸公晗严慕婷华南农业大学海洋学院广东广州510642

统计并分析东江河源段表层水体及鱼类肠道中的微塑料污染现状,可丰富内陆水域尤其是珠江流域的微塑料数据,为进一步研究淡水水体的微塑料污染特征提供数据支撑。2019年6月采集东江河源段的表层水体及䱗(Hemicculter Leuciclus)、黄颡鱼(P... 详细信息

统计并分析东江河源段表层水体及鱼类肠道中的微塑料污染现状,可丰富内陆水域尤其是珠江流域的微塑料数据,为进一步研究淡水水体的微塑料污染特征提供数据支撑。2019年6月采集东江河源段的表层水体及䱗(Hemicculter Leuciclus)、黄颡鱼(Pelteobagrus fulvidraco)、黄鳍刺鰕虎鱼(Acanthogobius flaviman)、鲤(Cyprinus carpio)、鲮(Cirrhinus molitorella)和子陵吻鰕虎鱼(Rhinogobius giurinus)的肠道作为试验材料,在体视显微镜下对表层水和鱼类肠道滤膜进行观察和记录,分析其微塑料污染特征。结果显示,6种鱼类的肠道中都发现了微塑料,丰度为57.3~2910.3个/kg;水体中微塑料丰度为366.67~1200个/m^(3)。表层水中65.93%微塑料为蓝色,以纤维为主,尺寸<2 mm的微塑料占比达88.95%;鱼体中尺寸<0.5 mm的微塑料占比41.41%,超过84.73%为透明和蓝色,主要以纤维和碎片为主。使用傅立叶变换红外光谱仪对微塑料样品进行成分鉴定,表层水中微塑料主要成分是聚苯乙烯,占比37.5%;6种鱼类肠道内的微塑料成分以聚酰胺为主,占比22.39%。东江河源段表层水体的微塑料污染水平较低,水质较好;不同鱼类中的微塑料污染水平存在差异,污染水平总体偏高,可能与食性和栖息水层相关。

关键词：微塑料表层水鱼类肠道污染特征东江河源段

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Evaluation of water management on arsenic methylation and volatilization in arsenic-contaminated soils strengthened by bioaugmentation and biostimulation

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Journal of Environmental Sciences 2024年第3期137卷 515-526页

作者： Peng chen yi Liu guo-Xin Sun State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Key Laboratory of Aquatic Botany and Watershed Ecology Wuhan Botanical GardenChinese Academy of SciencesWuhan 430074China University of Chinese Academy of Sciences Beijing 100049China

Arsenic(As) fate in paddy fields has been one of the most significant current issues due to the strong As accumulation potential of rice plants under fooded conditions. However,no attempt was done to explore As methylation and volatilization under non-fooded conditions. Herein, we investigated the effects of water management on As methylation and volatilization in three arsenic-contaminated soils enhanced by biostimulation with strawderived organic matter and bioaugmentation with genetic engineered Pseudomonas putida KT2440(GE P. putida). Under fooded conditions, the application of biochar(BC), rice straw(RS)and their combination(BC+RS) increased total As in porewater. However, these effects were greatly attenuated under non-fooded conditions. Compared with RS amendment alone, the combination of GE P. putida and RS further promoted the As methylation and volatilization,and the promotion percentage under non-fooded conditions were significantly higher than that under fooded conditions. The combined GE P. putida and RS showed the highest efficiency in As methylation(88 μg/L) and volatilization(415.4 μg/(kg·year)) in the non-fooded soil with moderate As contamination. Finally, stepwise multiple linear regression analysis presented that methylated As, DOC and p H in porewater were the most important factors contributing to As volatilization. Overall, our findings suggest that combination of bioaugmentation with GE P. putida and biostimulation with RS/BC+RS is a potential strategy for bioremediation of arsenic-contaminated soils by enhancing As methylation and volatilization under non-fooded conditions.

关键词： Arsenic methylation Arsenic volatilization Water management Straw incorporation Bioaugmentation

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Boosting charge transfer via interface charge reconstruction between amorphous NiFe-LDH and crystalline NiCo_(2)O_(4)for efficient alkaline water/seawater oxidation

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Nano Research 2024年第6期17卷 4856-4863页

作者： Zhonghang Xing yi Zhao Yunhai Wang Xiaohe Liu Zhiqiang guo Qingyun chen International Research Center for Renewable Energy and State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong UniversityXi’an 710049China Department of Environmental Science and Engineering Xi’an Jiaotong UniversityXi’an 710049China China School of Geology and Environment Xi’an University of Science and TechnologyXi’an 710049China Changqing Engineering Design Co. Ltd.Xi’an 710018China

Electrocatalysts with optimal efficiency and durability for the oxygen evolution reaction(OER)are becoming increasingly important as the demand for alkaline water/seawater electrolysis technology ***,a novel rose-shaped NiFe-layered double hydroxide(LDH)/NiCo_(2)O_(4)composed of amorphous wrinkled NiFe-LDH and highly crystalline NiCo_(2)O_(4)was synthesized with rich *** unsaturated metal sites are generated due to significant charge reconstruction at the heterointerface between the crystalline and amorphous *** metal sites could trigger and provide more active *** density functional theory(DFT)reveals that a new charge transfer channel(Co-Fe)was formed at the heterointerface between NiFe-LDH as electron acceptor and NiCo_(2)O_(4)as electron *** new charge transfer channel boosts interfacial charge transfer and enhances catalytic *** NiFe-LDH/NiCo_(2)O_(4)/nickel foam(NF)drives current densities of 10 and 100 mA·cm−2 with overpotentials of 193 and 236 mV,*** composite electrode demonstrates a fast turnover frequency(0.0143 s−1)at 1.45 V ***(RHE=reversible hydrogen electrode),which is 5.5 times greater than pure NiCo_(2)O_(4),suggesting its superior intrinsic ***,NiFe-LDH/NiCo_(2)O_(4)/NF electrode exhibited negligible degradation after 150 h of uninterrupted running in alkaline seawater *** study introduces a method for preparing high-efficiency electrocatalysts utilized in alkaline water/seawater electrolysis.

关键词： NiFe-layered double hydroxide(LDH)/NiCo_(2)O_(4)/nickel foam(NF) heterogeneous interfaces charge reconstruction water/seawater electrolysis

Effect of different bottom blowing elements on stirring characteristics of molten bath in converter

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Journal of Iron and Steel Research International 2024年第2期31卷 368-376页

作者： Ming Lv Shuang-ping chen Hong-min guo yi-jie Hao Xiang-dong Xing School of Metallurgical Engineering Xi’an University of Architecture and TechnologyXi’an710055ShaanxiChina Shaanxi Longmen Steel Company Hancheng715405ShaanxiChina

The bottom blowing element is the key equipment to ensure the bottom blowing effect of the *** types of bottom blowing elements,dispersive type(D1),double circular seam(D2)and straight cylinder type(D3),were built,and the effects of bottom blowing element type on molten bath flow,wall erosion and furnace bottom erosion were *** was found that when the bottom blowing elements of dispersive type(D1)and double circular seam(D2)were used,the dead zone area in the lower part of the molten bath was smaller,and the high-speed zone area was larger;therefore,the stirring effect on the bottom melt was *** the straight cylinder type(D3)bottom blowing element was used,the gas penetrated the molten bath at a faster rate to reach the surface of molten bath and failed to disperse in the bottom molten bath,and the wall shear stress near the nozzle outlet was *** argon was blown by three different bottom blowing elements,the area of the wall shear stress greater than 3 Pa was 4.8,5.6 and 8.7 cm2,respectively,within 0.2 m of the bottom blowing nozzle outlet.

关键词： Converter steelmaking Bottom blowing element Molten bath stirring Wall erosion

Identification of TMEM159 as a biomarker of glioblastoma progression based on immune characteristics

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BIOCELL 2024年第8期48卷 1241-1263页

作者： JI SHI YE ZHANG yi chen TANGJUN guo HAOZHE PIAO Graduate School Dalian Medical UniversityDalian116000China Department of Neurosurgery Liaoning Cancer Hospital&InstituteShenyang110042China Department of Neurosurgery Affiliated Hospital of Xuzhou Medical UniversityXuzhou221000China

Background:Glioblastoma multiforme(GBM)is the most general malignancy of the primary central nervous system that is characterized by high aggressiveness and *** protein 159(TMEM159)is an endoplasmic reticulum protein that can form oligomers with *** TMEM159-seipin complex decides the site of lipid droplet(LD)formation,and the formation of LDs is a marker of ***,the role of TMEM159 in the progression of GBM has not been investigated to ***:In this study,we examined the genes that may be associated with patient prognosis in GBM by bioinformatics analyses,and identified the key genes that affect the development of GBM using single-cell RNA sequencing *** biological functions of TMEM159 in GBM cells were additionally assessed by clone formation and transwell assays as well as using a model of chick embryo chorioallantois membrane(CAM)and western *** association between TMEM159 and epidermal growth factor receptor(EGFR)was finally analyzed in GBM ***:A prognostic model was established and validated for predicting the *** curve analysis showed a critical difference in the prognosis of the high-and low-risk groups predicted by the prognostic *** results demonstrated that TMEM159 affected the proliferation and invasion of GBM *** chick embryo CAM assays demonstrated that the inhibition of TMEM159 expression reduced angiogenesis in the CAM ***:The prognostic model achieved good predictive potential for high-risk *** findings also revealed that TMEM159 might be an important prognostic factor for GBM,indicating that the protein may be a promising therapeutic target for suppressing the development of GBM.

关键词： Single-cell RNA sequencing Glioblastoma TMEM159 EGFR Angiogenesis

An Encoding-Decoding Framework Based on CNN for circ RNA-RBP Binding Sites Prediction

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Chinese Journal of Electronics 2024年第1期33卷 256-263页

作者： Yajing guo Xiujuan LEI yi PAN School of Computer Science Shaanxi Normal University Faculty of Computer Science and Control Engineering Shenzhen Institute of Advanced TechnologyChinese Academy of Sciences Department of Computer Science Georgia State University

Predicting RNA binding protein(RBP) binding sites on circular RNAs(circ RNAs) is a fundamental step to understand their interaction mechanism. Numerous computational methods are developed to solve this problem, but they cannot fully learn the features. Therefore, we propose circ-CNNED, a convolutional neural network(CNN)-based encoding and decoding framework. We first adopt two encoding methods to obtain two original matrices. We preprocess them using CNN before fusion. To capture the feature dependencies, we utilize temporal convolutional network(TCN) and CNN to construct encoding and decoding blocks, respectively. Then we introduce global expectation pooling to learn latent information and enhance the robustness of circ-CNNED. We perform circ-CNNED across 37 datasets to evaluate its effect. The comparison and ablation experiments demonstrate that our method is superior. In addition, motif enrichment analysis on four datasets helps us to explore the reason for performance improvement of circ-CNNED.

关键词： Proteins RNA Neural networks Encoding Robustness Decoding Convolutional neural networks

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Optimal Cooperative Secondary Control for Islanded DC Microgrids via a Fully Actuated Approach

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IEEE/CAA Journal of Automatica Sinica 2024年第2期11卷 405-417页

作者： yi Yu guo-Ping Liu yi Huang Peng Shi IEEE Shenzhen Key Laboratory of Control Theory and Intelligent Systems Southern University of Science and TechnologyShenzhen 518055China School of Electrical Engineering and Automation Wuhan UniversityWuhan 430072China School of Electrical and Mechanical Engineering the University of AdelaideSA 5005Australia Research and Innovation Centre Obuda University1034 BudapestHungary

DC-DC converter-based multi-bus DC microgrids(MGs) in series have received much attention, where the conflict between voltage recovery and current balancing has been a hot topic. The lack of models that accurately portray the electrical characteristics of actual MGs while is controller design-friendly has kept the issue active. To this end, this paper establishes a large-signal model containing the comprehensive dynamical behavior of the DC MGs based on the theory of high-order fully actuated systems, and proposes distributed optimal control based on this. The proposed secondary control method can achieve the two goals of voltage recovery and current sharing for multi-bus DC MGs. Additionally, the simple structure of the proposed approach is similar to one based on droop control, which allows this control technique to be easily implemented in a variety of modern microgrids with different configurations. In contrast to existing studies, the process of controller design in this paper is closely tied to the actual dynamics of the MGs. It is a prominent feature that enables engineers to customize the performance metrics of the system. In addition, the analysis of the stability of the closed-loop DC microgrid system, as well as the optimality and consensus of current sharing are given. Finally, a scaled-down solar and battery-based microgrid prototype with maximum power point tracking controller is developed in the laboratory to experimentally test the efficacy of the proposed control method.

关键词： DC microgrids distributed control high-order fully actuated system approach linear quadratic regulator microgrid modeling secondary control

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New insights into the effect of hard carbons microstructure on the diffusion of sodium ions into closed pores

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Chinese Chemical Letters 2024年第6期35卷 155-160页

作者： Mingxin Song Lijing Xie Fangyuan Su Zonglin yi Quangui guo cheng-Meng chen CAS Key Laboratory of Carbon Materials Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001China University of Chinese Academy of Sciences Beijing 100049China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Closed pores formed in hard carbons play an essential role in sodium storage at plateau ***,the effect of different structural features on the diffusion of sodium ions into closed pores remains ***,a precursor reconstruction strategy is conducted to regulate carbon microstructures including interlayer spacing,defect concentration,and closed pore volume by changing the ratio of aromatic and polysaccharide *** structure parts tend to develop disordered carbons with fewer defects,larger interlayer spacing,and smaller closed pore volume,while polysaccharide components prefer to form disordered carbons with more defects,smaller interlayer spacing,and larger closed pore *** the correlation analysis of microstructure features and the sodium storage capacity below 0.1 *** finds that the intercalation capacity is proportional to the ratio of pseudo-graphitic domains,whereas the pore filling capacity appeared at lower potential gradually decreases with the increasing defect concentration due to homo-ionic repulsion effect,without linear correlation with shortrange microcrystalline and closed pore *** optimized sample with suitable interlayer spacing and defect concentration exhibits a high plateau capacity of 241.7 m Ah/*** work provides insights into the exploitation of closed pore sodium storage performance.

关键词： Precursor reconstruction Hard carbons Structural features Closed pore filling Sodium-ion batteries

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Matching Rota-Baxter Systems and Gröbner-Shirshov Bases

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Algebra Colloquium 2024年第3期31卷 389-406页

作者： yi Zhang Shuangjian guo School of Mathematics and Statistics Nanjing University of Information Science and Technology Nanjing 210044China School of Mathematics and Statistics Guizhou University of Finance and Economics Guiyang 550025China

Motivated by the concept of matching Rota-Baxter algebras arising from polarized associative Yang-Baxter equations and Volterra integral equations,we introduce the notion of a matching Rota-Baxter system,which generalizes the Rota-Baxter system proposed by *** show that this notion is also related to Yang-Baxter pairs and to matching pre-Lie *** then modify the definition of matching Rota-Baxter systems by adding a curvature term,and make a connection with matching pre-Lie algebras and with compatible associative ***,we study matching Rota-Baxter systems on a dendriform algebra and show how they induce matching quadri-algebra ***,we give a linear basis of free matching Rota-Baxter system by Grobner-Shirshov bases methods.

关键词： Rota-Baxter systems curved matching Rota-Baxter systems Gröbner-Shirshov bases