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Performance of Gas-Steam Combined Cycle Cogeneration Units Influenced by Heating Network Terminal Steam Parameters

Energy Engineering 2024年第6期121卷 1495-1519页

作者： Guanglu Xie Zhimin xue Bo Xiong Yaowen Huang Chaoming Chen Qing Liao Cheng Yang Xiaoqian ma Zhongshan Jiaming Electric Power Co. Ltd.CNOOC Gas&Power GroupZhongshan528403China School of Electric Power South China University of TechnologyGuangzhou510640China

The determination of source-side extracted heating parameters is of great significance to the economic operation of cogeneration *** paper investigated the coupling performance of a cogeneration heating and power system multidimensionally based on the operating characteristics of the cogeneration units,the hydraulic and thermodynamic characteristics of the heating network,and the energy *** a steam network supported by a gas-steam combined cycle cogeneration system as the research case,the interaction effect among the source-side prime movers,the heating networks,and the terminal demand thermal parameters were investigated based on the designed values,the plant testing data,and the validated *** operating maps of the gas-steam combined cycle cogeneration units were obtained using THERMOFLEX,and the minimum source-side steam parameters of the steam network were solved using an inverse solution procedure based on the hydro-thermodynamic coupling *** cogeneration operating maps indicate that the available operating domain considerably narrows with the rise of the extraction steam pressure and flow *** heating network inverse solution demonstrates that the source-side steam pressure and temperature can be optimized from the originally designed 1.11 MPa and 238.8°C to 1.074 MPa and 191.15°C,*** the operating strategy with the minimum source-side heating parameters,the power peak regulation depth remarkably increases to 18.30%whereas the comprehensive thermal efficiency *** operation under the minimum source-side heating steam parameters can be superior to the originally designed one in the economy at a higher price of the heating *** a fuel price of$0.38/kg and the power to fuel price of 0.18 kg/(kW·h),the critical price ratio of heating steam to fuel is 119.1 kg/*** influence of the power-fuel price ratio on the economic deviation appears relatively weak.

关键词： Gas-steam combined cycle cogeneration of heating and power steam network inverse problem operating performance

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A seven-crystal spectrometer for high-energy resolution X-ray spectroscopy at Shanghai Synchrotron Radiation Facility

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Nuclear Science and Techniques 2024年第9期35卷 82-91页

作者： Bing-Bao mei Liang-Xin Wang Song-Qi Gu Xiao-Zhi Su Shuo Zhang Yao Wei Jing-Yuan ma Zheng Jiang Fei Song Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201800China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201204China National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230026China

A Johann-type X-ray spectrometer was successfully developed at the hard X-ray branch(in-vacuum undulator with a 24-mm periodic length)of the energy material beamline(E-line)at the Shanghai Synchrotron Radiation Facility(SSRF).This spectrometer was utilized to implement X-ray emission spectroscopy(XES),high-energy resolution fluorescence-detected X-ray absorption spectroscopy(HERFD-XAS),and resonant inelastic X-ray *** spherically bent crystals were positioned on the respective vertical 500-mm-diameter Rowland circles,adopting an area detector to increase the solid angle to 1.75%of 4πsr,facilitating the study of low-concentrate systems under complex reaction *** under the atmosphere pressure,the spectrometer covers the energy region from 3.5 to 18 keV,with the Bragg angle ranging from 73°to 86°during vertical *** offers a promised energy resolution of sub-eV(XES)and super-eV(HERFD-XAS).Generally,these comprehensive core-level spectroscopy methods based on hard X-rays at the E-line with an extremely high photon flux can meet the crucial requirements of a green energy ***,they provide substantial support for scientific advances in fundamental research.

关键词： X-ray emission spectroscopy High-energy-resolution X-ray spectrometer Johann geometry Energy materials SSRF

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Loss of LBP triggers lipid metabolic disorder through H3K27 acetylation-mediated C/EBPβ-SCD activation in non-alcoholic fatty liver disease

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Zoological Research 2024年第1期45卷 79-94页

作者： Ya-Ling Zhu Lei-Lei Meng Jin-Hu ma Xin Yuan Shu-Wen Chen Xin-Rui Yi Xin-Yu Li Yi Wang Yun-Shu Tang Min xue mei-Zi Zhu Jin Peng xue-Jin Lu Jian-Zhen Huang Zi-Chen Song Chong Wu Ke-Zhong Zheng Qing-Qing Dai Fan Huang Hao-Shu Fang Department of Pathophysiology Anhui Medical UniversityHefeiAnhui 230032China Laboratory Animal Research Center School of Basic Medical SciencesAnhui Medical UniversityHefeiAnhui 230032China Department of Hepatobiliary Surgery First Affiliated Hospital of Anhui Medical UniversityHefeiAnhui 230022China College of Animal Science and Technology Jiangxi Agricultural UniversityNanchangJiangxi 330045China

Non-alcoholic fatty liver disease(NAFLD)is associated with mutations in lipopolysaccharide-binding protein(LBP),but the underlying epigenetic mechanisms remain ***,LBP^(-/-)rats with NAFLD were established and used to conduct integrative targetingactive enhancer histone H3 lysine 27 acetylation(H3K27ac)chromatin immunoprecipitation coupled with high-throughput and transcriptomic sequencing analysis to explore the potential epigenetic pathomechanisms of active enhancers of NAFLD exacerbation upon LBP ***,LBP^(-/-)reduced the inflammatory response but markedly aggravated high-fat diet(HFD)-induced NAFLD in rats,with pronounced alterations in the histone acetylome and regulatory *** total,1128 differential enhancer-target genes significantly enriched in cholesterol and fatty acid metabolism were identified between wild-type(WT)and LBP^(-/-)NAFLD *** on integrative analysis,CCAAT/enhancer-binding proteinβ(C/EBPβ)was identified as a pivotal transcription factor(TF)and contributor to dysregulated histone acetylome H3K27ac,and the lipid metabolism gene SCD was identified as a downstream effector exacerbating *** study not only broadens our understanding of the essential role of LBP in the pathogenesis of NAFLD from an epigenetics perspective but also identifies key TF C/EBPβand functional gene SCD as potential regulators and therapeutic targets.

关键词： Non-alcoholic fatty liver disease C/EBPβ Lipopolysaccharide-binding protein H3K27ac Integrative analysis Enhancer

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Surface-phonon-polariton-enhanced photoinduced dipole force for nanoscale infrared imaging

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National Science Review 2024年第5期11卷 227-235页

作者： Jian Li Junghoon Jahng xuezhi ma Jing Liang xue Zhang Qianhao Min Xiao-Liang Wang Shuangjun Chen Eun Seong Lee Xing-Hua Xia State Key Lab of Analytical Chemistry for Life Science School of Chemistry and Chemical Engineering Nanjing University Hyperspectral Nano-Imaging Team Korea Research Institute of Standards and Science Institute of materials Research and Engineering Agency for ScienceTechnology and Research College of materials Science and Engineering Nanjing Tech University

The photoinduced dipole force(Pi DF) is an attractive force arising from the Coulombic interaction between the light-induced dipoles on the illuminated tip and the sample. It shows extreme sample-tip distance and refractive index dependence, which is promising for nanoscale infrared(IR) imaging of ultrathin samples. However, the existence of Pi DF in the mid-IR region has not been experimentally demonstrated due to the coexistence of photoinduced thermal force(Pi TF), typically one to two orders of magnitude higher than Pi DF. In this study, we demonstrate that, with the assistance of surface phonon polaritons, the Pi DF of c-quartz can be enhanced to surpass its Pi TF, enabling a clear observation of Pi DF spectra reflecting the properties of the real part of permittivity. Leveraging the detection of the Pi DF of phonon polaritonic substrate, we propose a strategy to enhance the sensitivity and contrast of photoinduced force responses in transmission images, facilitating the precise differentiation of the heterogeneous distribution of ultrathin samples.

关键词： surface phonon polariton photoinduced dipole force nanoscale infrared imaging ultrathin sample

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Wild soybean(Glycine soja)transcription factor GsWRKY40 plays positive roles in plant salt tolerance

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The Crop Journal 2024年第3期12卷 766-775页

作者： Minglong Li man xue Huiying ma Peng Feng Tong Chen Xiaohuan Sun Qiang Li Xiaodong Ding Shuzhen Zhang Jialei Xiao Key Laboratory of Agricultural Biological Functional Genes Northeast Agricultural UniversityHarbin 150030HeilongjiangChina Key Laboratory of Soybean Biology of Chinese Education Ministry Northeast Agricultural UniversityHarbin 150030HeilongjiangChina Department of Plant Science School of Agriculture and BiologyShanghai Jiao Tong UniversityShanghai 200240China College of Life Science Leshan Normal UniversityLeshan 614000SichuanChina Mudanjiang Branch of Heilongjiang Academy of Agricultural Sciences Mudanjiang 157401HeilongjiangChina

Wild soybean(Glycine soja),a relative of cultivated soybean,shows high adaptability to adverse environmental *** identified and characterized a wild soybean transcription factor gene,GsWRKY40,that promotes plant salt ***40 was highly expressed in wild soybean roots and was up-regulated by salt ***40 was localized in nucleus and demonstrated DNA-binding activities but without transcriptional *** and overexpression of GsWRKY40 altered salt tolerance of Arabidopsis *** understand the molecular mechanism of GsWRKY40 in regulating plant salt resistance,we screened a cDNA library and identified a GsWRKY40 interacting protein GsbHLH92 by using yeast two-hybrid *** physical interaction of GsWRKY40 and GsbHLH92 was confirmed by co-immunoprecipitation(co-IP),GST pull-down,and bimolecular fluorescence complementation(BiFC)***,co-overexpression of GsWRKY40 and GsbHLH92 resulted in higher salt tolerance and lower ROS levels than overexpression of GsWRKY40 or GsbHLH92 in composite soybean plants,suggesting that GsWRKY40 and GsbHLH92 may synergistically regulate plant salt resistance through inhibiting ROS ***-PCR data indicated that the expression level of GmSPOD1 gene encoding peroxidase was cooperatively regulated by GsWRKY40 and GsbHLH92,which was confirmed by using a dual luciferase report system and yeast one-hybrid *** study reveals a pathway that GsWRKY40 and GsbHLH92 collaboratively up-regulate plant salt resistance through impeding GmSPOD1 expression and reducing ROS levels,providing a novel perspective on the regulatory mechanisms underlying plant tolerance to abiotic stresses.

关键词： Wild soybean Transcription factor Salt stress ROS

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Nitrogen accumulation in a big lake affected by groundwater discharge in Central Yangtze River Basin

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Journal of Earth Science 2024年

作者： Liansong Tang Rui ma Lin Jingjing Ying Liang xue Jiang Hubei Key Laboratory of Yangtze River Basin Environmental Aquatic Science， School of Environmental Studies and State Key Laboratory of Biogeology and Environmental Geology， China University of Geosciences Changjiang Basin Ecology and Environment Monitoring and Scientific Research Center，Changjiang Basin Ecology and Environment Administration， Ministry of Ecology and Environment

Nitrogen pollution is a major cause of lake eutrophication， garnering global concern for its detrimental impact on lake-water quality. However， the intricate interplay between lakes and groundwater in the accumulation and release of nitrogen remains largely overlooked. Using Honghu Lake as a case study， a large lake in the Yangtze River basin long plagued by nitrogen pollution， this study analyzed the temporal shifts in its water area from 1990 to 2021 using remote-sensing image classification algorithms. From 1990 to 2005， the natural water area of Hong Lake decreased by 72%. The transformation of much of this area into aquaculture zones and agricultural lands has led to a substantial influx of pollutants， culminating in the degradation of the water quality. Despite efforts to restore the natura water area post ban on aquaculture activities， the water quality of the lake remains compromised， indicating other pollution sources menacing the ecosystem of the lake. Field investigations conducted in 2011 and 2019 unveiled substantially higher concentrations of NH4-N and NO3-N in groundwater compared to lake water， with a discernible upward trajectory in pollutant levels over time. The18O mass-balance model was employed to assess groundwater flow dynamics， revealing an estimated lacustrine groundwater discharge of 0.71×106m3/d， underscoring the substantial annual influx of pollutants into the lake via groundwater pathways. Through a comprehensive analysis of surface water and groundwater quality trends within the study area， this research provides novel evidence implicating groundwater as a formidable contributor to the persistent nitrogen pollution afflicting Honghu Lake.

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Ferulic acid reduces inflammatory response induced by radiation through Sirt1-NLRP3 pathway

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Acupuncture and Herbal Medicine 2024年第3期4卷 367-374页

作者： Yao Nie Mingyue Huang Tingyu Yang Yu mei Huiting Zhang xue Wei Yue Gao Zengchun ma Beijing Institute of Radiation Medicine BeijingChina Anhui Zhifei Longcom Biopharmaceutical Co. Ltd.HefeiChina Tianjin University of Traditional Chinese Medicine TianjinChina School of Traditional Chinese Medicine Guangdong Pharmaceutical UniversityGuangzhouChina

Objective:A model of inflammatory damage was induced by radiation to investigate whether ferulic acid(FA)can reduce the inflammatory response through the Sirt1-NLRP3 inflammatory *** will help discover radiation-protective drugs and elucidate the molecular mechanisms related to radiation-induced inflammatory ***:A mouse model of radiation-induced immunoinflammatory injury was established to verify the anti-inflammatory effects of FA in vivo.C57BL/6J mice were randomly divided into six groups,and 5 Gy whole-body irradiation was used for *** were administered a gastric solvent,amifostine,or 25,50,or 100 mg/kg FA daily for 12 days,consecutively,before *** serum of mice was collected 24 hour after irradiation to observe the content of inflammatory factors interleukin(IL)-1β,IL-18,IL-6,and tumor necrosis factor(TNF)-α.The spleen and thymus tissues of mice were weighed and the organ index was calculated for pathological testing and immunofluorescence ***:FA reduced the radiation-induced decrease in the spleen and thymus *** significantly reduced the secretion of inflammatory factors in the serum and reversed the radiation-induced reduction in lymphocytes in the spleen and thymus of *** activated Sirt1 and inhibited the expression of the NLRP3 inflammasome to alleviate the inflammatory ***:FA reduced radiation-induced inflammation in animals,possibly by activating Sirt1 and reducing nucleotide oligomerization domain(NOD)-like receptor thermal protein domain associated protein 3(NLRP3)inflammasome expression,thereby reducing the secretion of inflammatory factors.

关键词： Ferulic acid NLRP3 inflammasome Radiation inflammation Sirt1

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Strengthening strategy for high-performance friction stir lap welded joints based on 5083 Al alloy

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International Journal of Minerals,Metallurgy and materials 2024年第11期31卷 2498-2507页

作者： Yujia Shen Jijie Wang Beibei Wang Peng xue Fengchao Liu Dingrui Ni Bolv Xiao Zongyi ma College of material Science and Engineering Shenyang Aerospace UniversityShenyang 110136China Shi-changxu Innovation Center for Advanced materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China CAS Key Laboratory of Nuclear materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Binzhou Institute of Technology Shandong Key Laboratory of Advanced Aluminium Materials and TechnologyWeiqiao-UCAS Science and Technology ParkBinzhou 256606China Centre of Excellence for Advanced materials Dongguan 523808China

During aircraft,ship,and automobile manufacturing,lap structures are frequently produced among Al alloy skins,wall panels,and *** occurrence of welding defects severely decreases mechanical properties during friction stir lap welding(FSLW).This study focuses on investigating the effects of rotation rate,multipass welding,and cooling methods on lap defect formation,microstructural evolution,and mechanical *** defects were eliminated by decreasing welding speed,applying two-pass FLSW with a small welding tool,and introducing additional water cooling,thus leading to a remarkable increase in effective sheet thickness and lap *** above strategy yielded defect-free joints with an ultrafine-grained microstructure and increased tensile shear force from 298 to 551 N/*** fracture behavior of FSLW joints was systematically studied,and a fracture factor of lap joints was proposed to predict their fracture *** reducing the rotation rate,using two-pass welding,and employing additional water cooling strategies,an enlarged,strengthened,and defect-free lap zone with refined ultrafine grains was achieved with a quality comparable to that of lap welds based on 7xxx Al ***,this study provides a valuable FSLW method for eliminating hook defects and improving joint performance.

关键词： friction stir lap welding defect control microstructure fracture mechanisms mechanical properties

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Short-term displacement prediction for newly established monitoring slopes based on transfer learning

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China Geology 2024年第2期7卷 351-364页

作者： Yuan Tian Yang-landuo Deng Ming-zhi Zhang Xiao Pang Rui-ping ma Jian-xue Zhang Institute of Remote Sensing and Geographical Information Systems Peking UniversityBeijing 100871China Beijing Key Laboratory of Spatial Information Integration and Its Applications Beijing 100871China Institute of Public Safety Research Department of Engineering PhysicsTsinghua UniversityBeijing 100084China China Institute of Geo-Environment Monitoring Beijing 100081China Technology Innovation Center for Geohazard Monitoring and Risk Early Warning Ministry of Natural ResourcesBeijing 100081China

This study makes a significant progress in addressing the challenges of short-term slope displacement prediction in the Universal Landslide Monitoring Program,an unprecedented disaster mitigation program in China,where lots of newly established monitoring slopes lack sufficient historical deformation data,making it difficult to extract deformation patterns and provide effective predictions which plays a crucial role in the early warning and forecasting of landslide hazards.A slope displacement prediction method based on transfer learning is therefore ***,the method transfers the deformation patterns learned from slopes with relatively rich deformation data by a pre-trained model based on a multi-slope integrated dataset to newly established monitoring slopes with limited or even no useful data,thus enabling rapid and efficient predictions for these ***,as time goes on and monitoring data accumulates,fine-tuning of the pre-trained model for individual slopes can further improve prediction accuracy,enabling continuous optimization of prediction results.A case study indicates that,after being trained on a multi-slope integrated dataset,the TCN-Transformer model can efficiently serve as a pretrained model for displacement prediction at newly established monitoring *** three-day average RMSE is significantly reduced by 34.6%compared to models trained only on individual slope data,and it also successfully predicts the majority of deformation *** fine-tuned model based on accumulated data on the target newly established monitoring slope further reduced the three-day RMSE by 37.2%,demonstrating a considerable predictive *** conclusion,taking advantage of transfer learning,the proposed slope displacement prediction method effectively utilizes the available data,which enables the rapid deployment and continual refinement of displacement predictions on newly established monitoring slopes.

关键词： Landslide Slope displacement prediction Transfer learning Integrated dataset Transformer Pre-trained model Universal Landslide Monitoring Program(ULMP) Geological hazards survey engineering

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Si-Wu-Tang attenuates liver fibrosis via regulating lncRNA H19-dependent pathways involving cytoskeleton remodeling and ECM deposition

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Chinese Journal of Natural Medicines 2024年第1期22卷 31-46页

作者： QU Jiaorong xue Xiaoyong WANG Zhixing ma Zhi JIA Kexin LI Fanghong ZHANG Yinhao WU Ruiyu ZHOU Fei ZHAO Piwen LI Xiaojiaoyang School of Life Sciences Beijing University of Chinese MedicineBeijing 100029China School of Chinese materia Medica Beijing University of Chinese MedicineBeijing 100029China State Key Laboratory of Medical Molecular Biology Department of Molecular Biology and BiochemistryInstitute of Basic Medical SciencesChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100005China

Liver fibrosis is a dynamic wound-healing response characterized by the agglutination of the extracellular matrix(ECM).Si-Wu-Tang(SWT),a traditional Chinese medicine(TCM)formula,is known for treating gynecological diseases and liver *** previous studies demonstrated that long non-coding RNA H19(H19)was markedly upregulated in fibrotic livers while its deficiency markedly reversed ***,the mechanisms by which SWT influences H19 remain ***,we established a bile duct ligation(BDL)-induced liver fibrosis model to evaluate the hepatoprotective effects of SWT on various cells in the *** results showed that SWT markedly improved ECM deposition and bile duct reactions in the ***,SWT relieved liver fibrosis by regulating the transcription of genes involved in the cytoskeleton remodeling,primarily in hepatic stellate cells(HSCs),and influencing cytoskeleton-related angiogenesis and hepatocellular *** modulation collectively led to reduced ECM *** extensive bioinformatics analyses,we determined that H19 acted as a miRNA sponge and mainly inhibited miR-200,miR-211,and let7b,thereby regulating the above cellular regulatory ***,SWT reversed H19-related miRNAs and signaling pathways,diminishing ECM deposition and liver ***,these protective effects of SWT were diminished with the overexpression of H19 in *** conclusion,our study elucidates the underlying mechanisms of SWT from the perspective of H19-related signal networks and proposes a potential SWT-based therapeutic strategy for the treatment of liver fibrosis.

关键词： Liver fibrosis LncRNA H19 Si-Wu-Tang miRNAs Cytoskeleton ECM deposition

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