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Study on in-situ microbial methanogenesis of CO2 and in-situ inhibition of H2S and increase of coalbed methane production in low-quality coalbed methane of the Southern Junggar Basin

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Meitan Xuebao/Journal of the China Coal Society 2025年第1期50卷 532-545页

作者： Su, Xianbo Ding, Rui Zhao, Weizhong Yan, Detian Li, Ruiming Wang, Yibing Wang, Haichao Huang, Shenghai Zhou, Yixuan Wang, Xiaoming Fu, Haijiao School of Resources and Environment Henan Polytechnic University Jiaozuo454000 China Unconventional gas research institute Henan Polytechnic University Jiaozuo454000 China School of Energy Resources China University of Geosciences Wuhan430074 China Collaborative innovation Center of Coalbed Methane and Shale Gas for Central Plains Economic Region Jiaozuo454000 China Xinjiang Coal Field Geology Bureau Urumqi830091 China Co. Ltd. Urumqi830011 China School of Geological and Mining Engineering Xinjiang University Urumqi830047 China Co. Ltd. Urumqi830011 China

The development and utilization of coalbed methane (CBM) not only ensures national energy security, but also provides a boost to carbon neutrality. The southern edge of the Junggar Basin is a major CBM resource area and a key development hotspot in China. However, the region has few high-yield wells, and maintaining stable production is challenging. There is an urgent need for a technology that can increase the production of CBM resources within the control range of a single well. Additionally, high volume fractions of CO2 and H2S have become common in the CBM of this region, creating an urgent need for in-situ disposal technology for these gases. Coalbed gas bioengineering offers a promising technology for enhancing both the quality and production of CBM in this region. On-site monitoring and laboratory simulation experiments indicate that the CO2 volume fraction is closely linked to reservoir temperature. Acid-producing fermentative bacteria and Hydrogen-producing acetic acid bacteria remain active and continue to produce CO2 across a broad range of reservoir temperatures. At lower reservoir temperatures, the metabolism of hydrogenotrophic methanogens is weak and CO2 is difficult to be reduced, which is the main reason for the high CO2 volume fraction in this area. It was also found that the microbial community in the groundwater interacts with organic matter and SO24− during migration. H2S is generated when the groundwater recharge and drainage rates are consistent with the metabolic cycle of methanogens, which is called epigenetic H2S. The presence of these two acidic gases not only compromises production safety but also significantly reduces the quality of CBM. This study introduces a key technology for in-situ microbial-mediated enhancement of CBM quality and production, addressing the issue of low-quality CBM in southern Junggar Basin. The necessity and feasibility of this technology are discussed, highlighting its potential to enhance CBM production, facilit

关键词： Coal deposits

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OpBench: an operator-level GPU benchmark for deep learning

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Science China(Information Sciences) 2024年第9期67卷 76-87页

作者： Qingwen GU Bo FAN Zhengning LIU Kaicheng CAO Songhai ZHANG Shimin HU Department of Computer Science and technology Tsinghua University National innovation Institute of Defense technology Academy of Military Science Beijing Fitten technology Co. Ltd.

Operators(such as Conv and ReLU) play an important role in deep neural networks. Every neural network is composed of a series of differentiable operators. However, existing AI benchmarks mainly focus on accessing model training and inference performance of deep learning systems on specific models. To help GPU hardware find computing bottlenecks and intuitively evaluate GPU performance on specific deep learning tasks, this paper focuses on evaluating GPU performance at the operator level. We statistically analyze the information of operators on 12 representative deep learning models from six prominent AI tasks and provide an operator dataset to show the different importance of various types of operators in different networks. An operator-level benchmark, OpBench, is proposed on the basis of this dataset, allowing users to choose from a given range of models and set the input sizes according to their demands. This benchmark offers a detailed operator-level performance report for AI and hardware developers. We also evaluate four GPU models on OpBench and find that their performances differ on various types of operators and are not fully consistent with the performance metric FLOPS(floating point operations per second).

关键词： deep learning operator benchmark model benchmark GPU performance analysis deep neural networks

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Encapsulating perovskite quantum dots into 3D COF for visible light-driven CO2 reduction

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Science China Chemistry 2025年

作者： Xinxin Wang Yucheng Jin Xiya Yang Qingyu Luan Tianyu Wang Dongdong Qi Kang Wang Jianzhuang Jiang College of Chemistry and Materials Science Anhui Normal University Beijing Advanced innovation Center for Materials Genome Engineering Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials Department of Chemistry and Chemical Engineering School of Chemistry and Biological EngineeringUniversity of Science and Technology Beijing

Lead halide perovskite quantum dots（LHP QDs） have been revealed to possess great potential in photocatalytic applications including CO2reduction, which however suffer from poor stability. Herein, a high crystalline hydrazine-linked three-dimensional（3D） covalent organic framework, USTB-17, was fabricated from the reaction between 12-connected building block and 4-connected 3,5,7-tetrakis（4-aldophenyl）-adamantane. Post-modification with Ni2+affords the metallic framework USTB-17（Ni）followed by sequential deposition of the CH3NH2PbI3（MAPbI3） perovskite QDs into its pores, generating the USTB-17（Ni）@MAPbI3composite. Powder X-ray diffraction analysis together with theoretical simulations and transmission electron microscopy discloses the crystalline nature of USTB-17, USTB-17（Ni）, and USTB-17（Ni）@MAPbI3with an unprecedented noninterpenetrated hpt topology. The close contact of QDs inside the COF pores with the Ni catalytic site locating at the pore surface of COF allows a rapid transfer of the photogenerated electrons in QDs to the Ni catalytic sites, enhancing the photocatalytic activity for CO2reduction. This endows USTB-17（Ni）@MAPbI3with efficient photocatalysis performance for photocatalytic CO2reduction with CO generation rate of 365 μmol g-1h-1and CO selectivity up to 96% under visible-light irradiation, 7 times higher than that of USTB-17（Ni）. After four cycles of reactions, the photocatalytic CO generation rate remains almost unchanged, demonstrating its excellent cycle stability.

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Convolutional Graph Neural Network with Novel Loss Strategies for Daily Temperature and Precipitation Statistical Downscaling over South China

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Advances in Atmospheric Sciences 2025年第1期42卷 232-247页

作者： Wenjie YAN Shengjun LIU Yulin ZOU Xinru LIU Diyao WEN Yamin HU Dangfu YANG Jiehong XIE Liang ZHAO Central South University Changsha 410083China Hunan Expressway Information technology Co. Ltd.Changsha 410053China Guangdong Climate Center Guangzhou 510610China Hong Kong Polytechnic University Shenzhen Research Institute Guangdong 518057China Jieyang Meteorological Bureau Jieyang 522031China State Key Laboratory of Numerical Modeling for Atmosphere Sciences and Geophysical Fluid Dynamics(LASG) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China

Traditional meteorological downscaling methods face limitations due to the complex distribution of meteorological variables,which can lead to unstable forecasting results,especially in extreme *** overcome this issue,we propose a convolutional graph neural network(CGNN)model,which we enhance with multilayer feature fusion and a squeeze-and-excitation ***,we introduce a spatially balanced mean squared error(SBMSE)loss function to address the imbalanced distribution and spatial variability of meteorological *** CGNN is capable of extracting essential spatial features and aggregating them from a global perspective,thereby improving the accuracy of prediction and enhancing the model's generalization *** on the experimental results,CGNN has certain advantages in terms of bias distribution,exhibiting a smaller *** it comes to precipitation,both UNet and AE also demonstrate relatively small *** for temperature,AE and CNNdense perform outstandingly during the *** time correlation coefficients show an improvement of at least 10%at daily and monthly scales for both temperature and ***,the SBMSE loss function displays an advantage over existing loss functions in predicting the98th percentile and identifying areas where extreme events ***,the SBMSE tends to overestimate the distribution of extreme precipitation,which may be due to the theoretical assumptions about the posterior distribution of data that partially limit the effectiveness of the loss *** future work,we will further optimize the SBMSE to improve prediction accuracy.

关键词： statistical downscaling convolutional graph neural network feature processing SBMSE loss function

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Bio-inspired Hydroxyapatite/Gelatin Transparent Nanocomposites

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Journal of Wuhan University of technology(Materials Science) 2024年第2期39卷 298-308页

作者：谭军军 WU Mingchen LI Yuzhe PENG Jiamei 熊焰 Hubei Province Key Laboratory of Green Materials for light Industry Collaborative Innovation Center for Green Light-weight Materials and ProcessingHubei University of TechnologyWuhan 430068China

Hydroxyapatite(HA)nanoparticles impart outstanding mechanical properties to organicinorganic nanocomposites in *** by the composite structure of HA nanoparticles and collagen in bone,a high performance HA/gelatin nanocomposite was first *** nanocomposites have much better mechanical properties(elongation at break 29.9%,tensile strength 90.7 MPa,Young’s modulus 5.24 GPa)than pure gelatin films(elongation at break 9.3%,tensile strength 90.8 MPa,Young’s modulus 2.5 GPa).In addition,the composite films keep a high transmittance in visible wavelength range from 0%to 60%of the HA solid *** differences in properties are attributed to the homogeneous distribution of HA nanoparticles in the gelatin polymer matrix and the strong interaction between the particle surfaces and the gelatin *** protocol should be promising for HA-based nanocomposites with enhanced mechanical properties for biomedical applications.

关键词： hydroxyapatite nanocomposites sodium citrate gelatin colloidal stability

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In-situ synthesis of Z-scheme CeO2@WO3 heterojunction with aromatic rings as electron medium for efficient photocatalytic degradation of perfluorobutane sulfonate

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Journal of Rare Earths 2025年第3期 470-479页

作者： Shihai Cao Haocheng Yang Cheng Cheng Jinheng Dai Shuaishuai Lu Yao Lu College of Environmental Engineering Nanjing Institute of Technology Jiangsu Environmental Engineering technology Co. Ltd. Key Laboratory of Jiangsu Province for Chemical Pollution Control and Resources Reuse School of Environmental and Biological EngineeringNanjing University of Science and Technology School of Environment and Safety Engineering School of Emergency ManagementInstitute of Environment and EcologyJiangsu University Jiangsu Collaborative innovation Ceater of technology and Material of Water Treatment Suzhou University of Science and Technology

Photocatalytic technology has been proven to be a simple and effective method for degrading recalcitrant organic *** this study,a series of Z-scheme heterojunction nanocomposites composed of CeO2and terephthalic acid-modified WO3was prepared and further used as photocatalysts for perfluorobutane sulfonate（PFBS） *** this design,terephthalic acid was used as an electron recombination center and heterojunction mediator,which effectively enhances the migration ability of electron-hole pairs and the physicochemical stability of the *** addition,in situ synthesis of CeO2onto the WO3surface by the coordinate bond between terephthalic acid and Ce ions can avoid *** a result,the CeO2@WO3photocatalyst exhibits excellent PFBS degradation ability（94%for CeO2@WO3vs.19% for CeO2）.After the fifth cyclic degradation experiment,the CeO2@WO3photocatalyst still maintains stable degradation ***,the reaction mechanism of the PFBS in CeO2@WO3photocatalytic process was analyzed by free radical trapping experiment and liquid chromatography tandem mass spectrometry（LC-MS） *** study provides new insights for constructing Z-scheme heterojunction and demonstrates that CeO2@WO3photocatalysts possess a promising prospect for degrading PFBS pollutants.

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Bifidobacterium breve CCFM1078 regulates bone development in growing BALB/c mice via gut microbiota and metabolites to balance bone formation and resorption

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Food Science and Human Wellness 2025年第1期14卷 307-331页

作者： Bowen Li Mengfan Ding Xiaoming Liu Haiqin Chen Jianxin Zhao RPaul Ross Catherine Stanton Shilong Jiang Wei Chen Bo Yang State Key Laboratory of Food Science and technology Jiangnan UniversityWuxi 214122China School of Food Science and technology Jiangnan UniversityWuxi 214122China International Joint Research Center for Probiotics&Gut Health Jiangnan UniversityWuxi 214122China APC Microbiome Ireland University College CorkCork T12 K8AFIreland Teagasc Food Research Centre Cork P61 C996Ireland Nutrition and Metabolism Research Division Innovation CenterHeilongjiang Feihe Dairy Co.Ltd.Beijing 100015China PKUHSC-China Feihe Joint Research Institute of Nutrition and Healthy Lifespan Development Beijing 100083China National Engineering Research Center for Functional Food Jiangnan UniversityWuxi 214122China

This study endeavors to investigate the effects of Bifidobacterium breve CCFM1078 on bone formation and resorption balance in growing BALB/c *** BALB/c mice were assigned to the control group(administration saline)and the CCFM1078 group(administration *** CCFM1078,3×10^(9) CFU/day)in 3-,4-,and 5-week *** the groups have male and female *** findings demonstrate that *** CCFM1078 exerts on the dynamic equilibrium between bone formation and resorption during the critical period of growth in mice by modulating the composition of gut microbiota and metabolites(hexadecanamide,linoleoyl ethanolamide,and palmitoyl ethanolamide),the genes and proteins expression related to the growth hormone(GH)/insulin-like growth factors-1(IGF-1)axis and Gs/PKA/CREB signaling pathways,as well as downstream osteogenic and osteoclastic differentiation *** effects of *** CCFM1078 were different with age and gender *** finding suggests *** CCFM1078 may have potential applications in regulating bone metabolism in the growth period population.

关键词： Bifidobacterium breve Bone development Gut microbiota GH/IGF-1 axis Gs/PKA/CREB signaling pathway

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Property and microstructure analysis of ZK60 alloy superplastic sheet

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Journal of Harbin Institute of technology(New Series) 2011年第3期18卷 33-36页

作者：于彦东江鹏冯娟王国军 School of Materials Science and Engineering Harbin Science of Technology Northern light Alloy Company ltd.

It was investigated that the superplastic mechanical properties of fine-grained ZK60 magnesium alloy sheets at the temperature range of 200-420 ℃ and strain rate range of 5.56 × 10-4 -5.56 ×10-2 s-1 by tensile *** the microstructure evolution during the superplastic deformation of ZK60 magnesium alloy was examined by metallurgical microscope and transmission electronic microscope (TEM).The results showed that fine-grained ZK60 magnesium alloy starts to exhibit superplasticity from 250 ℃ and the maximum elongation is about 1106% at 400 ℃ and 5.56 × 10-4 *** strain rate sensitivity is significantly enhanced with the increase of temperature and with the decrease of strain *** predominate superplastic mechanism of ZK60 magnesium alloy is grain boundary slide (GBS) at the temperature range of 300-400 ℃.The grains of ZK60 alloy remain equaxial after superplastic deformation,and dynamic continuous recrystallization (DCRX) is an important softening mechanism and grain stability mechanism during the superplastic deformation of the *** curved grain boundaries and crumpled bands at grain boundaries after deformation prove GBS generates during superplastic deformation of ZK60 magnesium alloy.

关键词： fine-grained ZK60 magnesium alloy superplasticity dynamic recrystallization grain boundary sliding

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Crystallization Modulation and Holistic Passivation Enables Efficient Two‑Terminal Perovskite/CuIn(Ga)Se_(2)Tandem Solar Cells

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Nano-Micro Letters 2025年第1期17卷 205-215页

作者： Cong Geng Kuanxiang Zhang Changhua Wang Chung Hsien Wu Jiwen Jiang Fei Long Liyuan Han Qifeng Han Yi‑Bing Cheng Yong Peng State Key Laboratory of Advanced technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070People’s Republic of China Triumph Photovoltaic Materials Co. Ltd.No.1001 Yannan AvenueHigh‑Tech Development DistrictBengbuAnhui 233000People’s Republic of China College of Materials Science and Engineering Guilin University of TechnologyGuilin 541004People’s Republic of China State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong UniversityShanghai 200240People’s Republic of China

Two-terminal(2-T)perovskite(PVK)/CuIn(Ga)Se_(2)(CIGS)tandem solar cells(TSCs)have been considered as an ideal tandem cell because of their best bandgap matching regarding to Shockley–Queisser(S–Q)***,the nature of the irregular rough morphology of commercial CIGS prevents people from improving tandem device *** this paper,D-homoserine lactone hydrochloride is proven to improve coverage of PVK materials on irregular rough CIGS surfaces and also passivate bulk defects by modulating the growth of PVK *** addition,the minority carriers near the PVK/C60 interface and the incompletely passivated trap states caused interface recombination.A surface reconstruction with 2-thiopheneethylammonium iodide and N,N-dimethylformamide assisted passivates the defect sites located at the surface and grain ***,LiF is used to create this field effect,repelling hole carriers away from the PVK and C60 interface and thus reducing *** a result,a 2-T PVK/CIGS tandem yielded a power conversion efficiency of 24.6%(0.16 cm^(2)),one of the highest results for 2-T PVK/CIGS TSCs to our *** validation underscores the potential of our methodology in achieving superior performance in PVK/CIGS tandem solar cells.

关键词： PVK/CIGS TSCs Irregular rough surfaces Modulating the growth PVK/C60 interface recombination

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Microplastics enhance the adsorption capacity of zinc oxide nanoparticles:Interactive mechanisms and influence factors

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Journal of Environmental Sciences 2025年第1期147卷 665-676页

作者： Weiping Xiong Min Hu Siying He Yuhang Ye Yinping Xiang Haihao Peng Zhaomeng Chen Zhengyong Xu Honglin Zhang Weixiang Li Shudian Peng College of Environmental Science and Engineering Hunan University and Key Laboratory of Environmental Biology and Pollution Control(Hunan University)Ministry of EducationChangsha 410082China Hunan Boke Environmental Engineering Co.ltd. Hengyang 421099China College of Environmental Protection and Safety Engineering University of South ChinaHengyang 421001China Hunan Modern Environmental technology Co.ltd. Changsha 410004China

Microplastics(MPs)are of particular concern due to their ubiquitous occurrence and propensity to interact and concentrate various waterborne contaminants from aqueous *** on the interaction and joint toxicity of MPs on engineered nanoparticles(ENPs)are exhaustive,but limited research on the effect of MPs on the properties of ENPs in multisolute ***,the effect of MPs on adsorption ability of ENPs to antibiotics was investigated for the first *** results demonstrated that MPs enhanced the adsorption affinity of ENPs to antibiotics and MPs before and after aging showed different effects on *** polyamide prevented aggregation of ZnONPs by introducing negative charges,whereas virgin polyamide affected ZnONPs with the help of electrostatic ***-IR and XPS analyses were used to probe the physicochemical interactions between ENPs and *** results showed no chemical interaction and electrostatic interactionwas the dominant force between ***,the adsorption rate of antibiotics positively correlated with pH and humic acid but exhibited a negative correlation with ionic *** study highlights that ENPs are highly capable of accumulating and transporting antibiotics in the presence of MPs,which could result in a widespread distribution of antibiotics and an expansion of their environmental risks and toxic effects on *** also improves our understanding of the mutual interaction of various co-existing contaminants in aqueous environments.

关键词： Microplastics Engineered nanoparticles Adsorption Tetracycline

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