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Journal of Materials Science & Technology 2021年第7期66卷 112-120页

作者： hanyu Zhao Yupeng sun Lu Yin Zhao Yuan Yiliang Lan Dake Xu Chunguang Yang Ke Yang School of Materials Science and Engineering University of Science and Technology of ChinaShenyang110016China Institute of Metal Research Chinese Academy of SciencesShenyang110016China Shenyang National Laboratory for Materials Science Northeastern UniversityShenyang110819China

304 stainless steel(SS) used as orthodontic wire during orthodontics faces the risk of microbiologically influenced corrosion(MIC) due to diverse flora environment. Hereinto, Streptococcus mutans(S. mutans)is the most important cariogenic bacteria. In this work, MIC behavior of a new 304-Cu SS in presence of S. mutans was studied by the observations using scanning electron microscopy(SEM) and confocal laser scanning microscopy(CLSM) including live/dead staining, extracellular polymeric substance(EPS)staining and pitting corrosion, electrochemical test, and X-ray photoelectron spectroscopy(XPS). Above results showed that 304-Cu SS possessed excellent biofilm inhibition ability and presented lower corrosion current density(icorr), larger polarization resistance(Rp) and charge transfer resistance(Rct) in the presence of S. mutans, indicating that 304-Cu SS had a better MIC resistance against S. mutans. It was further affirmed by XPS results that the presence of Cu-oxide in passive film of 304-Cu SS inhibited the formation of biofilm.

关键词： 304-Cu stainless steel Microbiologically influenced corrosion Streptococcus mutans Biofilm

Sediment Compaction and Pore Pressure Prediction in Deepwater Basin of the South China Sea: Estimation from ODP and IODP Drilling Well Data

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Journal of Ocean University of China 2018年第1期17卷 25-34页

作者： XIE Yangbing WU Tuoyu sun Jin ZHANG hanyu WANG Jiliang GAO Jinwei CHEN Chuanxu Laboratory of Marine Geophysics and Georesources Institute of Deep-Sea Science and Engineering Chinese Academy of Sciences Laboratory for Marine Geology Qingdao National Laboratory for Marine Science and Technology Department of Earth and Environment Sciences University of Windsor ON

Overpressure in deepwater basins not only causes serious soft sediment deformation, but also significantly affects the safety of drilling operations. Therefore, prediction of overpressure in sediments has become an important task in deepwater oil exploration and development. In this study, we analyze the drilling data from ODP Leg 184 Sites 1144, 1146, and 1148, and IODP Leg 349 Sites U1431, U1432, U1433, and U1435 to study the sediment compaction and controls in the northern South China Sea. Sedimentation rate, sediment content, distribution area, and buried depth are the factors that influence sediment compaction in the deepwater basin of the South China Sea. Among these factors, the sediment content is the most important. The fitted normal compacted coefficients and mudline porosity for an interval of 50 m shows disciplinary variation versus depth. The pore pressure predicted from different fitted results shows varying overpressure situations. The normal compaction trend from Site 1144 reflects the porosity variation trend in stable deposition basins in the northern South China Sea. The predicted pore pressure shows overpressure at Site 1144, which is attributed to compaction disequilibrium. Nevertheless, the mixed lithology column may influence the predicted overpressure at Site 1148, which is responsible for the confusing result. Above all, we find that sediment compaction should serve as a proxy for pore pressure in the deepwater basin of the South China Sea.

关键词： normal compaction pore pressure prediction deepwater basin South China Sea

Numerical Simulation of Mechanical Compaction of Deepwater Shallow Sediments

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Journal of Ocean University of China 2018年第1期17卷 53-64页

作者： sun Jin WU Shiguo DENG Jingen LIN Hai ZHANG hanyu WANG Jiliang GAO Jinwei Laboratory of Marine Geophysics&Geo-Resources Institute of Deep-Sea Science and EngineeringChinese Academy of SciencesSanya 572000China Qingdao National Laboratory for Marine Science and Technology Qingdao 266237China College of Earth Sciences University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Petroleum Resources and Prospecting China University of PetroleumBeijing 102249China CNOOC China Limited Tianjin Branch Tianjin 300451China

To study the compaction law and overpressure evolution in deepwater shallow sediments, a large-strain compaction model that considers material nonlinearity and moving boundary is formulated. The model considers the dependence of permeability and material properties on void ratio. The modified Cam-Clay model is selected as the constitutive relations of the sediments, and the deactivation/reactivation method is used to capture the moving top surface during the deposition process. A one-dimensional model is used to study the compaction law of the shallow sediments. Results show that the settlement of the shallow sediments is large under their own weight during compaction. The void ratio decreases strictly with burial depth and decreases more quickly near the seafloor than in the deeper layers. The generation of abnormal pressure in the shallow flow sands is closely related to the compaction law of shallow sediments. The two main factors that affect the generation of overpressure in the sands are deposition rate and permeability of overlying clay sediments. Overpressure increases with an increase in deposition rate and a decrease in the permeability of the overlying clay sediment. Moreover, an upper limit for the overpressure exists. A two-dimensional model is used to study the differential compaction of the shallow sediments. The pore pressure will still increase due to the inflow of the pore fluid from the neighboring clay sediment even though the deposition process is interrupted.

关键词： mechanical compaction deepwater shallow sediments compaction law shallow water flow overpressure evolution

Mn_(x)Co_(3-x)O_(4)Microtubules with Enhanced Catalytic Activity Towards Toluene Combustion:Effects of Redox Property and Oxygen Species

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China Petroleum Processing & Petrochemical Technology 2021年第4期23卷 7-17页

作者： Zhang hanyu Hu Yue Zhang Xiaohan sun Mengyao Liu Rui Qi Jian Jin Quan Key Laboratory of Automobile Materials(Ministry of Education) School of Materials Science and EngineeringJilin UniversityChangchun 130022 School of Chemical Engineering Dalian University of TechnologyPanjin 124221 College of Environmental and Safety Engineering Shenyang University of Chemical TechnologyShenyang 110142 State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190

The redox property and oxygen species play an important role in the catalytic oxidation of volatile organic compounds(VOCs).In this paper,a series of Mn_(x)Co_(3-x)O_(4)catalysts with tubular structure were synthesized and applied for the catalytic combustion of *** characterization technologies were employed to reveal the relationship between the catalytic performance of the Mn_(x)Co_(3-x)O_(4)catalysts and Mn *** results of XRD,SEM and N2 adsorption-desorption analyses showed that the Mn doping had significant effects on the structure and morphology of the Mn_(x)Co_(3-x)O_(4)*** H2-TPR,O2-TPD,and XPS results proved that the strong interaction between Co and Mn resulted in the enhanced Olatt mobility,the richer active oxygen species,and the enhanced redox property in comparison with the pure Co_(3)O_(4)sample,which were crucial to the improvement of the catalytic activity of Co-Mn *** best catalyst,Co5-Mn5 sample,exhibited a good and stable activity to catalytically oxidize toluene at low temperatures even in the presence of water vapor,indicating that it is a potential material to be used in the commercialization of catalytic abatement of toluene.

关键词： catalytic combustion cobalt oxides manganese doping,toluene

A Transformer-Based Ensemble Framework for the Prediction of Protein-Protein Interaction Sites

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Research 2024年第2期2023卷 703-718页

作者： Minjie Mou Ziqi Pan Zhimeng Zhou Lingyan Zheng hanyu Zhang Shuiyang Shi Fengcheng Li Xiuna sun Feng Zhu College of Pharmaceutical Sciences The Second Affliated HospitalZhejiang University School of MedicineNational Key Laboratory of Advanced Drug Delivery and Release SystemsZhejiang UniversityHangzhou 310058China Innovation Institute for Artificial Intelligence in Medicine of Zhejiang University Alibaba-Zhejiang University Joint Research Center of Future Digital HealthcareHangzhou 330110China

The identification of protein-protein interaction (PPI) sites is essential in the research of protein function and the discovery of new drugs. So far, a variety of computational tools based on machine learning have been developed to accelerate the identification of PPI sites. However, existing methods suffer from the low predictive accuracy or the limited scope of application. Specifically, some methods learned only global or local sequential features, leading to low predictive accuracy, while others achieved improved performance by extracting residue interactions from structures but were limited in their application scope for the serious dependence on precise structure information. There is an urgent need to develop a method that integrates comprehensive information to realize proteome-wide accurate profiling of PPI sites. Herein, a novel ensemble framework for PPI sites prediction, EnsemPPIS, was therefore proposed based on transformer and gated convolutional networks. EnsemPPIS can effectively capture not only global and local patterns but also residue interactions. Specifically, EnsemPPIS was unique in (a) extracting residue interactions from protein sequences with transformer and (b) further integrating global and local sequential features with the ensemble learning strategy. Compared with various existing methods, EnsemPPIS exhibited either superior performance or broader applicability on multiple PPI sites prediction tasks. Moreover, pattern analysis based on the interpretability of EnsemPPIS demonstrated that EnsemPPIS was fully capable of learning residue interactions within the local structure of PPI sites using only sequence information. The web server of EnsemPPIS is freely available at http://***/ensemppis.

关键词： residue extracting ensemble

Ionic liquid driven nanostructure self-assembly in organic mixed ionic-electronic conductors

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Green Chemical Engineering 2024年第3期5卷 273-275页

作者： Xingyu Hu Ning Mao Dezhen Zhao Xu Liu Qingqing sun Huige Yang Xuying Liu hanyu Jia School of Materials Science and Engineering Zhengzhou UniversityZhengzhou450001China

As a type of three-terminal transistor,organic electrochemical transistors(OECTs)can effectively modulate their channel conductivity through ionic electrochemical doping across gate-electrolyte-channel routes,endowing their versatile applications in bioelectronics,low power logic circuit,and neuromorphic computing[1].In the concrete,free cations/anions in aqueous electrolytes driven by gate voltage can effectively penetrate into the bulk channel,then resulting in the volumetric n/p-doping of channel ***,the film thickness of the channel also involves the modulation of OECT performance owing to the polymer swelling and ion penetration,which is hardly occurred in other transistors working in field-effect mode.

关键词： doping ionic swelling

Enhanced hydrogen storage of alanates: Recent progress and future perspectives

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Progress in Natural Science:Materials International 2021年第2期31卷 165-179页

作者： Li Zhao Fen Xu Chenchen Zhang Zhenyue Wang hanyu Ju Xu Gao Xiaoxu Zhang Lixian sun Zongwen Liu Guangxi Key Laboratory of Information Materials Guangxi Collaborative Innovation Center of Structure and Property for New Energy and Materials School of Materials Science and Engineering Guilin University of Electronic Technology School of Chemical and Biomolecular Engineering The University of Sydney The University of Sydney Nano Institute The University of Sydney

The global energy crisis and environmental pollution have caused great concern. Hydrogen is a renewable and environmentally friendly source of energy and has potential to be a major alternative energy carrier in the *** to its high capacity and relatively low cost of raw materials, alanate has been considered as one of the most promising candidates for hydrogen storage. Among them, LiAlH4and NaAlH4, as two representative metal alanates, have attracted extensive attention. Unfortunately, the high desorption temperature and sluggish kinetics restrict its practical application. In this paper, the basic physical and chemical properties as well as the hydrogenation/dehydrogenation reaction mechanism of LiAlH4and NaAlH4are briefly reviewed. The recent progress on strategic optimizations toward tuning the thermodynamics and kinetics of the alanate including nanoscaling,doping catalysts and compositing modification are emphatically discussed. Finally, the coming challenges and the development prospects are also proposed in this review.

关键词： Hydrogen storage LiAlH 4 NaAlH 4 Nanoscaling Catalysts Mechanism

Non-invasive Healthcare Analytical Platform Based on Organic Electrochemical Transistors

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Chemical Research in Chinese Universities 2024年第5期40卷 824-848页

作者： HU Xingyu MAO Ning YAN Xinwen HUANG Ling LIU Xu YANG Huige sun Qingqing LIU Xuying JIA hanyu School of Materials&Engineering Zhengzhou UniversityZhengzhou450001P.R.China Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education&Hubei Key Laboratory of Catalysis and Materials Science Hubei R&D Center of Hyperbranched Polymers Synthesis and ApplicationsSouth-Central University for NationalitiesWuhan430074P.R.China Science&Technology Innovation Center for Advanced Materials of Intelligent Equipment Longmen LaboratoryLuoyang471000P.R.China

Non-invasive bioelectronics,especially organic electrochemical transistors(OECTs),have drawn extensive attentions of academical and medical communities by virtue of their efficient bio-electronic interfacing,water-involved ionic transport,excellent ionic-electronic coupling,ultralow power consumption,wide detectable range,and outstanding detection *** structure diversity,low-temperature solution processability,facile bio/chemical functionalization,and excellent biocompatibility of organic mixed ionic-electronic conductors(OMIECs)render OECTs particularly suitable for non-invasive or minimally invasive healthcare analytical ***,we comprehensively review recent advances of the non-invasive analytical healthcare applications based on OECTs,especially on the detection of biomarkers or metabolites in the excretory biofluids,as well as the recording of electrophysiological signals.A brief introduction of OECT and its comparison with other organic thin-film transistors upon device configuration and working mechanism are firstly ***-of-the-art non-invasive OECT-based biosensors are summarized on their detection of ionic and molecular biomarkers,following with circuit design strategies of OECTs for real-time and in-situ electrophysiological recording from skin *** conclusion,remaining barriers and future challenges of non-invasive OECT-based bioelectronics towards lower detection limit,more accurate quantitative relationship between analyte concentrations and measured parameters,more intimate device-tissue interface,and long-term operation stability are deeply analyzed with a critical outlook.

关键词： Organic electrochemical transistor Non-invasive Bioelectronics Ion-selective Electrophysiological monitoring

Pre-Drilling Prediction Techniques on the High-Temperature High-Pressure Hydrocarbon Reservoirs Offshore Hainan Island,China

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Journal of Ocean University of China 2018年第1期17卷 72-82页

作者： ZHANG hanyu LIU Huaishan WU Shiguo sun Jin YANG Chaoqun XIE Yangbing CHEN Chuanxu GAO Jinwei WANG Jiliang Laboratory of Marine Geophysics and Georesource Institute of Deep-Sea Science and EngineeringChinese Academy of ScienceSanya 572000China Key Laboratory of Submarine Geosciences and Prospecting Techniques Ministry of EducationOcean University of ChinaQingdao 266100China Laboratory for Marine Geology Qingdao National Laboratory for Marine Science and TechnologyQingdao 266061China Shenzhen Branch of CNOOC Shenzhen 518000China College of Earth Sciences University of Chinese Academy of SciencesBeijing 100049China

Decreasing the risks and geohazards associated with drilling engineering in high-temperature high-pressure(HTHP) geologic settings begins with the implementation of pre-drilling prediction techniques(PPTs). To improve the accuracy of geopressure prediction in HTHP hydrocarbon reservoirs offshore Hainan Island, we made a comprehensive summary of current PPTs to identify existing problems and challenges by analyzing the global distribution of HTHP hydrocarbon reservoirs, the research status of PPTs, and the geologic setting and its HTHP formation mechanism. Our research results indicate that the HTHP formation mechanism in the study area is caused by multiple factors, including rapid loading, diapir intrusions, hydrocarbon generation, and the thermal expansion of pore fluids. Due to this multi-factor interaction, a cloud of HTHP hydrocarbon reservoirs has developed in the Ying-Qiong Basin, but only traditional PPTs have been implemented, based on the assumption of conditions that do not conform to the actual geologic environment, e.g., Bellotti's law and Eaton's law. In this paper, we focus on these issues, identify some challenges and solutions, and call for further PPT research to address the drawbacks of previous works and meet the challenges associated with the deepwater technology gap. In this way, we hope to contribute to the improved accuracy of geopressure prediction prior to drilling and provide support for future HTHP drilling offshore Hainan Island.

关键词： pre-drilling prediction techniques formation pore pressure high-temperature high-pressure hydrocarbon reservoirs Hainan Island Ying-Qiong Basin

INTERCROPPING TEA PLANTATIONS WITH SOYBEAN AND RAPESEED ENHANCES NITROGEN FIXATION THROUGH SHIFTS IN SOIL MICROBIAL COMMUNITIES

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Frontiers of Agricultural Science and Engineering 2022年第3期9卷 344-355页

作者： Yongjia ZHONG Lini LIANG Ruineng XU hanyu XU Lili sun Hong LIAO Root Biology Center College of Resources and EnvironmentFujian Agriculture and Forestry UniversityFuzhou 350002China.

Intercropping with eco-friendly crops is a well-known strategy for improving agriculture sustainability with benefits throughout the soil community,though the range of crop impacts on soil microbiota and extent of feedbacks to crops remain largely *** study evaluated the impacts of different intercropping systems on soil bacterial community composition,diversity,and potential functions in tea *** systems were found to be significantly influenced soil *** the three tested intercropping systems(tea-soybean,tea-rapeseed and tea-soybean-rapeseed),the teasoybean-rapeseed intercropping system had the most dramatic influence on soil microbiota,with increases in richness accompanied by shifts in the structure of tea garden soil bacterial ***,relative abundance of potentially beneficial bacteria associated with essential mineral nutrient cycling increased significantly in the tea-soybean-rapeseed intercropping *** addition,soil microbial functions related to nutrient cycling functions were significantly *** was in accordance with increasing relative abundance of nitrogen cycling bacteria,including Burkholderia *** Rhodanobacter *** on these results,it is proposed that intercropping tea plantation with soybean and rapeseed may benefit soil microbiota,and thereby promises to be an important strategy for improving soil health in ecologically sound tea production systems.

关键词： intercropping rapeseed soil microbe soybean tea garden