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Multiscale tensegrity model for the tensile properties of DNA nanotubes

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Applied Mathematics and Mechanics(English Edition) 2023年第3期44卷 397-410页

作者： hanlin liu Nenghui ZHANG Wei LU Shanghai Institute of Applied Mathematics and Mechanics Shanghai Key Laboratory of Mechanics in Energy EngineeringSchool of Mechanics and Engineering ScienceShanghai UniversityShanghai 200072China Qishuyan Senior High School of Changzhou Changzhou 213000Jiangsu ProvinceChina

DNA nanotubes(DNTs)with user-defined shapes and functionalities have potential applications in many *** far,compared with numerous experimental studies,there have been only a handful of models on the mechanical properties of such *** paper aims at presenting a multiscale model to quantify the correlations among the pre-tension states,tensile properties,encapsulation structures of DNTs,and the surrounding ***,by combining a statistical worm-like-chain(WLC)model of single DNA deformation and Parsegian's mesoscopic model of DNA liquid crystal free energy,a multiscale tensegrity model is established,and the pre-tension state of DNTs is characterized theoretically for the first ***,by using the minimum potential energy principle,the force-extension curve and tensile rigidity of pre-tension DNTs are ***,the effects of the encapsulation structure and surrounding factors on the tensile properties of DNTs are *** predictions for the tensile behaviors of DNTs can not only reproduce the existing experimental results,but also reveal that the competition of DNA intrachain and interchain interactions in the encapsulation structures determines the pre-tension states of DNTs and their tensile *** changes in the pre-tension states and environmental factors make the monotonic or non-monotonic changes in the tensile properties of DNTs under longitudinal loads.

关键词： DNA nanotube(DNT) multiscale model tensegrity structure pre-tension state tensile property

Piezoelectric and flexoelectric effects of DNA adsorbed films on microcantilevers

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Applied Mathematics and Mechanics(English Edition) 2023年第9期44卷 1547-1562页

作者： Yuan YANG Nenghui ZHANG hanlin liu Jiawei LING Zouqing TAN Shanghai Institute of Applied Mathematics and Mechanics Shanghai Key Laboratory of Mechanics in Energy EngineeringSchool of Mechanics and Engineering ScienceShanghai UniversityShanghai 200072China School of Mechanical Engineering and Rail Transit Changzhou UniversityChangzhou 213164Jiangsu ProvinceChina

DNA-based biosensors have played a huge role in many areas,especially in current global coronavirus ***,there is a great difficulty in the characterization of piezoelectric and flexoelectric coefficients of the nanoscale DNA film,because the existing experimental methods for hard materials are almost *** addition,the relevant theoretical models for DNA films only consider a single effect without clarifying the difference between the two electromechanical effects on device detection *** work aims to present multiscale models for DNA-microcantilever experiments to clarify the competitive mechanism in piezoelectric and flexoelectric effects of DNA films on detection ***,a Poisson-Boltzmann(PB)equation is used to predict the potential distribution due to the competition between fixed phosphate groups and mobile salt ions in DNA ***,a macroscopic piezoelectric/flexoelectric constitutive equation of the DNA film and a mesoscopic free energy model of the DNA solution are combined to analytically predict the electromechanical coefficients of the DNA film and the relevant microcantilever signals by the deformation equivalent method and Zhang’s two-variable ***,the effects of detection conditions on microscopic interactions,electromechanical coupling coefficients,and deflection signals are *** results not only agree well with the experimental observations,but also reveal that the piezoelectric and flexoelectric effects of the DNA film should be equivalently modeled when interpreting microcantilever detection *** insights might provide opportunities for the microcantilever biosensor with high sensitivity.

关键词： DNA microcantilever biosensor electromechanical coupling effect flexo-electricity piezoelectricity multiscale model

Optimization of Electricity Purchase and Sales Strategies of Electricity Retailers under the Condition of Limited Clean Energy Consumption

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Energy Engineering 2023年第3期120卷 701-714页

作者： Peng Liao hanlin liu Yingjie Wang Neng Liao Changsha University of Science&Technology Changsha410114China State Grid Shaoyang Electric Power Company Shaoyang422099China State Grid Ganzhou Electric Power Company Ganzhou341099China

In the process of my country’s energy transition,the clean energy of hydropower,wind power and photovoltaic power generation has ushered in great development,but due to the randomness and volatility of its output,it has caused a certain waste of clean energy power generation *** the purchase and sale of electricity by electricity retailers under the condition of limited clean energy consumption,this paper establishes a quantitative model of clean energy restricted electricity fromthe perspective of power system supply and demand *** it analyzes the source-charge dual uncertain factors in the electricity retailer purchasing and selling scenarios in the mid-to long-term electricity market and the day-ahead *** the multi-scenario analysis method,the uncertain clean energy consumption and the user’s power demand are combined to form the electricity retailer’s electricity purchase and sales scene,and the typical scene is obtained by using the hierarchical clustering *** paper establishes a electricity retailer’s risk decisionmodel for purchasing and selling electricity in themid-and long-term market and reduce-abandonment market,and takes the maximum profit expectation of the electricity retailer frompurchasing and selling electricity as the objective *** the same time,in themediumand longterm electricity market and the day-ahead market,the electricity retailer’s purchase cost,electricity sales income,deviation assessment cost and electricity purchase and sale risk are *** molecular results show that electricity retailers can obtain considerable profits in the reduce-abandonment market by optimizing their own electricity purchase and sales strategies,on the premise of balancing profits and risks.

关键词： Electricity retailer electricity purchase and sale strategy clean energy consumption

Controlling Factors on Organic Matter Accumulation of Marine Shale across the Ordovician–Silurian Transition in South China: Constraints from Trace-Element Geochemistry

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Journal of Earth Science 2021年第4期32卷 887-900页

作者： Zhen Qiu Huifei Tao Bin Lu Zhenhong Chen Songtao Wu hanlin liu Junli Qiu Research Institute of Petroleum Exploration and Development CNPCBeijing 100083China National Energy Shale Gas Research and Development(Experiment)Center Langfang 065007China Oil and Gas Research Center Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China Key Laboratory of Oil and Gas Reservoirs CNPCBeijing 100083China National Energy Tight Oil and Gas R&D Center Beijing 100083China Institute of Oil and Gas Peking UniversityBeijing 100871China

In recent years,significant progress in shale gas exploration has been achieved in the Upper Ordovician(Wufeng Formation)–Lower Silurian(Longmaxi Formation)shales in the Upper Yangtze area,South *** many studies have been carried out on the Upper Ordovician–Lower Silurian shales,the controlling factors causing organic matter accumulation of these shales remain *** study uses trace-element geochemistry and sedimentological methods to evaluate terrigenous input,redox conditions and primary productivity to explore the mechanisms of organic matter *** variation of terrigenous fraction elements(Al,Th and Sc)concentrations reflect a mixed influence of sea-level change and *** sea-level of the Upper Yangtze Sea went through two cycles of transgression to regression during the Ordovician–Silurian *** Linxiang Formation,Kuanyinchiao Bed and the upper part of Longmaxi Formation developed during the periods of regression,whereas the Wufeng Formation and the lower part of the Longmaxi Formation developed during the periods of *** paleo-productivity indexes of TOC content,ratios of Ba/Al and P/Al,and redox conditions proxies of Mo concentration,ratios of U/Th and V/Cr generally display similar variation patterns with respect to the sea-level *** TOC contents and Ba/Al and P/Al ratios indicate the paleo-productivity was high on the sea surface,as shown by relatively good positive correlations between Th ***,and Sc *** indicates that the paleo-productivity was controlled by the nutrients input through *** good positive correlations between redox conditions indexes(U/Th and V/Cr ratios)with TOC content reflects reductive preservation conditions(anoxic to euxinic),thus implying they were an important controlling factor for organic matter ***,redox conditions were closely associated with sea level change and organic matter ***,the sea-lev

关键词： productivity redox sea-level change shale gas Sichuan Basin Wufeng-Longmaxi shale

The evolution,pathogenicity and transmissibility of quadruple reassortant H1N2 swine influenza virus in China:A potential threat to public health

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Virologica Sinica 2024年第2期39卷 205-217页

作者： Xinxin Cui Jinhuan Ma Zifeng Pang Lingzhi Chi Cuishan Mai hanlin liu Ming Liao Hailiang Sun College of Veterinary Medicine South China Agricultural UniversityGuangzhou510642China Key Laboratory of Zoonosis Control and Prevention of Guangdong Province South China Agricultural UniversityGuangzhou510642China National and Regional Joint Engineering Laboratory for Medicament of Zoonosis Prevention and Control South China Agricultural UniversityGuangzhou510642China Shandong Vocational Animal Science and Veterinary College Weifang261061China Institute of Animal Health Guangdong Academy of Agricultural SciencesGuangzhou510640China

Swine are regarded as“intermediate hosts”or“mixing vessels”of influenza viruses,capable of generating strains with pandemic *** 2020 to 2021,we conducted surveillance on swine H1N2 influenza(swH1N2)viruses in swine farms located in Guangdong,Yunnan,and Guizhou provinces in southern China,as well as Henan and Shandong provinces in northern *** systematically analyzed the evolution and pathogenicity of swH1N2 isolates,and characterized their replication and transmission *** isolated viruses are quadruple reassortant H1N2 viruses containing genes from pdm/09 H1N1(PB2,PB1,PA and NP genes),triple-reassortant swine(NS gene),Eurasian Avian-like(HA and M genes),and recent human H3N2(NA gene)*** NA,PB2,and NP of SW/188/20 and SW/198/20 show high gene similarities to A/Guangdong/Yue Fang277/2017(H3N2).The HA gene of swH1N2 exhibits a high evolutionary *** five swH1N2 isolates replicate efficiently in human,canine,and swine cells,as well as in the turbinate,trachea,and lungs of mice.A/swine/Shandong/198/2020 strain efficiently replicates in the respiratory tract of pigs and effectively transmitted among ***,these current swH1N2 viruses possess zoonotic potential,highlighting the need for strengthened surveillance of swH1N2 viruses.

关键词： Swine influenza virus(SIV) H1N2 Evolution Replication Pathogenicity Zoonotic potential

Coordinating Zirconium Nodes in Metal-Organic Framework with Trifluoroacetic Acid for Enhanced Lewis Acid Catalysis

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Chemical Research in Chinese Universities 2022年第5期38卷 1301-1307页

作者： WANG Wenyang liu hanlin YANG Caoyu FAN Ting CUI Chengqian LU Xiaoquan TANG Zhiyong LI Guodong Department of Chemistry School of ScienceTianjin UniversityTianjin 300072P.R.China CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190P.R.China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049P.R.China Key Laboratory of Bioelectrochemistry&Environmental Analysis of Gansu Province College of Chemistry&Chemical EngineeringNorthwest Normal UniversityLanzhou 730070P.R.China

Regulating Lewis acid sites with well-defined electronic state and steric environment is still challenging for achieving high catalytic *** we show coordinating zirconium nodes in the typical metal-organic framework known as MOF-545 with the monocarboxylate modulators including trifluoroacetic acid(TFA)or benzoic acid(BA)over meso-tetra(4-carboxyphenyl)-porphine(H_(2)TCPP),denoted as MOF-545-TFA or ***,MOF-545-TFA shows the significantly enhanced performance for the catalytic ring-opening reaction of various epoxides with alcohols and good recyclability at 40°C in respect with MOF-545-BA and ZrO_(2).This mainly originates from the stronger Lewis acidity and more active zirconium sites induced by the electron-withdrawing TFA,resulting in the increased ability for activation of *** modulation approach is promising for enlarging the toolbox to extend the MOFs-based Lewis acid catalysis.

关键词： Metal-organic framework Active zirconium site Trifluoroacetic acid Epoxide ring-opening Modulator effect

Template-mediated strategy to regulate hierarchically nitrogen-sulfur co-doped porous carbon as superior anode material for lithium capacity

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Frontiers of Materials Science 2022年第1期16卷 157-170页

作者： Yun LI Wang YANG hanlin liu Zhiqiang TU Sai CHE Bo JIANG Chong XU Guang MA Guoyong HUANG Yongfeng LI State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China SINOPEC Research Institute of Petroleum Processing Beijing 100083China

Considering its rapid lithiation/delithiation process and robust capacitive energy storage,hierarchical porous carbon is regarded as a promising candidate for lithium-ion batteries(LIBs).However,it remains a great challenge to construct a porous structure and prevent structure stacking for carbon-based ***,a templatemediated approach is developed to synthesize hierarchical nitrogen-sulfur co-doped porous carbon(NSPC)using low-cost asphalt *** strategy for synthesis uses g-C_(3)N_(4) and NaHCO_(3) as gaseous templates and NaCl as a solid template,which causes the formation of hierarchical porous carbon with a high specific surface *** resultant porous structure and nitrogen-doping process can prevent the aggregation of nanosheets,maintain the structural stability upon cycling,and achieve rate-capable lithium *** as a LIBs anode,reversible specific capacities of the NSPC24 electrode reach 788 and 280 mAh·g^(-1) at 0.1 and 1 A·g^(-1),***,its specific capacity remains at 830 mAh·g^(-1) after 115 cycles at 0.1 A·g^(-1).Even after 500 cycles,high specific capacities of 727 mAh·g^(-1) at 0.5 A·g^(-1) and 624 mAh·g^(-1) at 1 A·g^(-1) are achieved,demonstrating excellent cycling *** gas-solid bifunctional template-mediated approach can guide the design of porous materials very well,meanwhile realizing the high value-added utilization of asphalt.

关键词： energy storage hierarchically porous carbon lithium-ion battery specific surface area nitrogen-doping process

Unveiling the Oldest Industrial Shale Gas Reservoir: Insights for the Enrichment Pattern and Exploration Direction of Lower Cambrian Shale Gas in the Sichuan Basin

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ENGINEERING 2024年第11期42卷 278-294页

作者： Zou, Caineng Zhao, Zhengfu Pan, Songqi Yin, Jia Lu, Guanwen Fu, Fangliang Yuan, Ming liu, hanlin Zhang, Guosheng Luo, Cui Wang, Wei Jing, Zhenhua PetroChina Res Inst Petr Explorat & Dev Beijing 100083 Peoples R China China Univ Min & Technol Coll Geosci & Survey Engn Beijing 100083 Peoples R China Peking Univ Sch Earth & Space Sci Beijing 100871 Peoples R China PetroChina Shenzhen New Energy Res Inst Shenzhen 518054 Peoples R China China Univ Geosci Beijing Sch Energy & Resource Beijing 100083 Peoples R China Chinese Acad Sci Nanjing Inst Geol & Palaeontol Nanjing 210008 Peoples R China

The lower Cambrian Qiongzhusi (C1q) shale in the Sichuan Basin, formerly considered a source rock, recently achieved high gas production (7.388 x 105 m3 d-1) from well Z201 in the Deyang-Anyue rift trough (DART), marking an exploration breakthrough of the world's oldest industrial shale gas reservoir. However, the shale gas enrichment mechanism within the DART is not fully understood. This study reviews the formation of the Qiongzhusi shale gas reservoirs within the DART by comparing them with cotemporaneous deposits outside the DART, and several findings are presented. The gas production interval was correlated with the main phase of the Cambrian explosion (lower Cambrian stage 3). In the early Cambrian ecosystem, dominant animals likely accelerated the settling rates of organic matter (OM) in the upper 1st member of C1q (C1q12) by feeding on small planktonic organisms and producing larger organic fragments and fecal pellets. High primary productivity and euxinic conditions contributed to OM enrichment in the lower 1st member of C1q (C1q11). Additionally, shale reservoirs inside the DART demonstrated better properties than those outside in terms of thickness, brittle minerals, gas content, and porosity. In particular, the abundant OM pores inside the DART facilitated shale gas enrichment, whereas the higher thermal maturity of the shales outside the DART possibly led to the graphitization and collapse of some OM pores. Meanwhile, the overpressure of highproduction wells inside the DART generally reflects better shale gas preservation, benefiting from the shale's self-sealing nature, "upper capping and lower plugging" configuration, and limited faults and microfractures. Considering these insights, we introduced a "ternary enrichment" model for the Qiongzhusi shale gas. Although the current high gas production of Z201 was found at the reservoir 3, two additional reservoirs were identified with significant potential, thus suggesting a "multilayer stereoscopic develop

关键词： Ultradeep shale gas Sichuan Basin Qiongzhusi shale Deyang-Anyue rift trough Well Z201 Ternary enrichment Multilayer stereoscopic development

Houston16:A stable geodetic reference frame for subsidence and faulting study in the Houston metropolitan area,Texas,U.S.

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Geodesy and Geodynamics 2019年第5期10卷 382-393页

作者： Timothy J.Kearns Guoquan Wang Michael Turco Jennifer Welch Vasilios Tsibanos hanlin liu Dept.of Earth and Atmospheric Sciences National Center for Airborne Laser MappingUniversity of HoustonHoustonTX77204USA Harris-Galveston Subsidence District FriendswoodTX77546USA

Houston,Texas,is one of the earliest regions to employ continuous GPS technology for land subsidence ***,there are over 200 permanent GPS stations located in the greater Houston *** need for a consistent and stable reference frame to precisely interpret local ground deformation has become critically important since the 1990s,because of the significant spreading of *** have established a stable Houston reference frame,designated Houston16,using publicly available GPS observations(>5 years)from 15 Continuously Operating Reference Stations(CORS)located outside of the greater Houston *** of the reference frame in subsidence and faulting studies are demonstrated in this ***16 is aligned in origin and scale with the International GNSS Reference Frame of 2008(IGS08).A 7-parameter method was employed to transform the GPS-derived positional time series from IGS08 to *** primary product of this study is the seven parameters for transforming Earth-Centered-Earth-Fixed XYZ coordinates from IGS08 to *** frame stability of Houston16 is approximately 1 mm/***16 will be updated every few years to mitigate degradation of the frame’s stability with time and to synchronize with future updates of the IGS reference frame.

关键词： Faulting GPS Houston IGS08 Reference frame Subsidence