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Cyclostratigraphy and paleoclimate analysis of the Lingshui Formation in Changchang Sag,Qiongdongnan Basin,China

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Energy Geoscience 2024年第1期5卷 108-120页

作者： Haizhang Yang Wu Tang Enze xu Shangfeng zhang Yaning Wang min xu China National Offshore Oil Research Institute Limited Beijing100028China College of Earth Sciences Yangtze River UniversityWuhanHubei430000China

The Qiongdongnan Basin,located in the sea between Hainan Island and the Xisha Islands,is a faulted Cenozoic basin on the northern continental margin of the South China *** Changchang Sag,situated in the eastern part of the central depressional zone in the deepwater area of the Qiongdongnan Basin,exhibits a near EW-striking morphology and represents an important potential target for oil/gas ***,the age of the interface of the Lingshui Formation remains controversial,which hinders a comprehensive understanding of the tectonic evolution and hydrocarbon accumulation pattern in the Changchang *** study focuses on well A,located in the depositional center of the Changchang Sag,and employs cyclostratigraphic analysis to identify cyclic signals of the Milankovitch cycles recorded in the sedimentary *** analysis of natural gamma logging data from this well reveals the presence of 405 kyr long eccentricity cycles,100 kyr short eccentricity cycles,39.3 kyr obliquity cycles,and 20.58 kyr age precession *** employing astronomical tuning,a“floating”astronomical time scale of the Lingshui Formation spanning 5.483 million years(Myr)is *** top interface of the Oligocene in the International Geological Time Scale 2020(GTS2020),with a geological age of 23.03 Ma,is used as the time anchor to establish a high-precision absolute astronomical age framework for the Lingshui *** results indicate that the bottom interface of the first member of the Lingshui Formation is dated at 23.79 Ma,the bottom interface of the second member is dated at 25.08 Ma,and the bottom interface of the third member is dated at 28.51 ***,the average sedimentation rate during this period is estimated to be 9.261 cm/***,paleoclimate and paleoenvironmental reconstructions were carried out through quantitative analysis of spore and pollen assemblages,as well as foraminifera within the Lingshui *** analyses suggest that

关键词： Milankovitch cycle Paleoclimate Qiongdongnan Basin Cyclostratigraphy Astronomical time scale

Electron-beam-driven anomalous Doppler effects in Smith–Purcell radiation

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Photonics Research 2024年第1期12卷 78-84页

作者： XIAOQIUYAN zhang TIANYU zhang ZHUOCHENG zhang XINGXING xu DIWEI LIU ZHAOYUN DUAN YANYU WEI YUBIN GONG LIANG JIE WONG min HU Terahertz Research Center School of Electronic Science and EngineeringUniversity of Electronic Science and Technology of ChinaChengdu 610054China Key Laboratory of Terahertz Technology Ministry of EducationChengdu 610054China School of Electrical and Electronic Engineering Nanyang Technological UniversitySingapore 639798Singapore

The interaction between electrons and matter is an effective means of light emission,through mechanisms including Cherenkov radiation and Smith–Purcell radiation(SPR).In this study,we show that the superlight inverse Doppler effects can be realized in reverse Smith–Purcell radiation excited by a free electron beam with a homogeneous *** particular,we find that two types of anomalous SPR exist in the homogenous substrate:special SPR and reverse *** results reveal that the electron velocity can be tuned to simultaneously excite different combinations of normal SPR,special SPR,and reverse *** proposed manifold light radiation mechanism can offer greater versatility in controlling and shaping SPR.

关键词： anomalous beam Electron

Biomass-based materials for advanced supercapacitor:principles,progress,and perspectives

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Aggregate 2024年第1期5卷 95-114页

作者： Yaxuan Wang Ting xu Kun Liu Meng zhang xu-min Cai Chuanling Si State Key Laboratory of Biobased Fiber Manufacturing Technology Tianjin Key Laboratory of Pulp and PaperTianjin University of Science and TechnologyTianjinChina Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources College of Chemical EngineeringNanjing Forestry UniversityNanjingChina

Supercapacitors exhibit considerable potential as energy storage devices due to their high power density,fast charging and discharging abilities,long cycle life,and *** the increasing environmental concerns associated with synthetic compounds,the use of environment friendly biopolymers to replace conventional petroleum-based materials has been widely ***-based materials are biodegradable,renewable,environment friendly and *** unique hierarchical nanostructure,excellent mechanical properties and hydrophilicity allow them to be used to create functional conductive materials with precisely controlled structures and different *** this review,the latest development of biomass-based supercapacitor materials is reviewed and *** paper describes the physical and chemical properties of various biopolymers and their impact on supercapacitors,as well as the classification and basic principles of ***,a comprehensive discussion is presented on the utilization of biomass-based materials in supercapacitors and their recent applications across a range of supercapacitor ***,an overview of the future prospects and challenges pertaining to the utilization of biomass-based materials in supercapacitors is provided.

关键词： biomass electrodes electrolyte energy storage supercapacitor

A comprehensive review of recent advancements and developments in heat exchanger network synthesis techniques

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Science China(Technological Sciences) 2024年第2期67卷 335-356页

作者： xu Yue LIU WeiWei zhang Lu CUI Guo min XIAO Yuan zhang GuanHua YANG QiGuo School of Energy and Power Engineering University of Shanghai for Science and TechnologyShanghai 200093China

The rapid development of computational technology and the increasing energy demand have improved heat exchanger network(HEN)*** HEN synthesis involves several optimizations of matches,distributions of heat loads,and stream splitting of heat ***,obtaining good results at high efficiency has been the main standard for evaluating the techniques in the research area of HEN *** paper first summarizes and analyzes the main contributions of the existing HEN synthesis *** compare related data quantitively,information on ten typical cases is presented in this ***,recently improved solutions for commonly encountered existing literature cases demonstrate the evolution and competition trends in the field of HEN *** comparison data presented in this paper not only provide a useful reference for future research but also present the optimization *** on the findings of this study,it is noted that there is still a large room for improvement,and current approaches are incapable of dealing with all HEN ***,it is still difficult to escape a local optimum and overcome structural constraints when seeking the global *** a follow-up to the current work,the parallel computing mode and adaptively coordinating the ratio of global and local searching abilities are major development trends for future investigation.

关键词： heat integration heat exchanger network synthesis sequential synthesis method simultaneous synthesis method optimization techniques development optimization quality

Ultrathin curved PdNiRu nanosheets as bifunctional catalysts for oxygen reduction and ethylene glycol oxidation

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Nano Research 2024年第5期17卷 3777-3784页

作者： Xianzeng Li Tingyu Lu Huan Pang mingyi zhang Dongdong xu Lin xu min Han Jun Yang Jiangsu Key Laboratory of New Power Batteries Jiangsu Collaborative Innovation Center of Biomedical Functional MaterialsSchool of Chemistry and Materials ScienceNanjing Normal UniversityNanjing 210023China Fujian Cross Strait Institute of Flexible Electronics(Future Technology) Fujian Normal UniversityFuzhou 350117China State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China State Key Laboratory of Coordination Chemistry Nanjing UniversityNanjing 210023China School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225009China Key Laboratory for Photonic and Electronic Bandgap Materials Ministry of EducationSchool of Physics and Electronic EngineeringHarbin Normal UniversityHarbin 150025China

Pd-based metallic nanosheets with advanced physicochemical properties have been widely prepared and employed in various electrocatalytic ***,few concerns were focused on their multiple performances in different ***,highly curved and ultrathin PdNiRu nanosheets(NSs)are developed by facile wet-chemistry strategy and exhibit excellent electrocatalytic performance toward both oxygen reduction reaction(ORR)and ethylene glycol oxidation reaction(EGOR).Owing to the synergistically structural(e.g.,ultrathin,curved,defects/steps-rich)and compositional(ternary alloy)advantages,PdNiRu NSs exhibited enhanced ORR and EGOR specific/mass activities and better stability/durability than control *** specific activity(5.52 mA·cm^(−2))and mass activity(1.13 A·mg_(Pd)^(−1))of the PdNiRu NSs in ORR are 4.8 and 3.4 times as the ones of commercial Pt/C,*** mass activity of PdNiRu NSs(3.86 A·mg_(Pd)^(−1))in EGOR is 2.6 times as commercial Pd/C(1.51 A·mg_(Pd)^(−1)).This study is helpful for the development of desired electrocatalysts with multi-functional application in practical fuel cells.

关键词： ultrathin nanosheets noble metal electrocatalysts bifunctional

ATAT1 deficiency enhances microglia/macrophage-mediated erythrophagocytosis and hematoma absorption following intracerebral hemorrhage

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Neural Regeneration Research 2024年第5期19卷 1072-1077页

作者： Yihua zhang Ping Huang min Cao Yi Chen Xinhu Zhao xuzhi He Lunshan xu Department of Neurosurgery Daping HospitalArmy Medical UniversityChongqingChina

MIcroglia/macrophage-mediated erythrophagocytosis plays a crucial role in hematoma clearance after intracerebral *** cytoskeletal changes accompany ***,whether and how these changes are associated with microglia/macrophage-mediated erythrophagocytosis remain *** this study,we investigated the function of acetylatedα-tubulin,a stabilized microtubule form,in microglia/macrophage erythrophagocytosis after intracerebral hemorrhage both in vitro and in *** first assessed the function of acetylatedα-tubulin in erythrophagocytosis using primary DiO GFP-labeled red blood cells co-cultured with the BV2 microglia or RAW264.7 macrophage cell ***α-tubulin expression was significantly decreased in BV2 and RAW264.7 cells during ***,silencingα-tubulin acetyltransferase 1(ATAT1),a newly discoveredα-tubulin acetyltransferase,decreased Ac-α-tub levels and enhanced the erythrophagocytosis by BV2 and RAW264.7 *** with these findings,in ATAT1-/-mice,we observed increased ionized calcium binding adapter molecule 1(Iba1)and Perls-positive microglia/macrophage phagocytes of red blood cells in peri-hematoma and reduced hematoma volume in mice with intracerebral ***,knocking out ATAT1 alleviated neuronal apoptosis and pro-inflammatory cytokines and increased anti-inflammatory cytokines around the hematoma,ultimately improving neurological recovery of mice after intracerebral *** findings suggest that ATAT1 deficiency accelerates erythrophagocytosis by microglia/macrophages and hematoma absorption after intracerebral *** results provide novel insights into the mechanisms of hematoma clearance and suggest ATAT1 as a potential target for the treatment of intracerebral hemorrhage.

关键词： acetylatedα-tubulin α-tubulin acetyltransferase 1(ATAT1) erythrophagocytosis hematoma absorption intracerebral hemorrhage macrophage microglia

Research progress of heterogeneous structure magnesium alloys:A review

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Journal of Magnesium and Alloys 2024年第6期12卷 2147-2181页

作者： Xiang Chen Junlei zhang min Wang Weizhang Wang Di Zhao Haiming Huang Qi Zhao Xiaofei xu Hongxia zhang Guangsheng Huang Hubei Longzhong Laboratory Wuhan University of Technology Xiangyang Demonstration ZoneXiangyang 441000China College of Materials Science and Engineering Hubei University of Automotive TechnologyShiyan 442002China College of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093China Hubei Key Laboratory of Energy Storage and Power Battery(Hubei University of Automotive Technology) Shiyan 442002China College of Materials Science and Engineering Chongqing UniversityChongqing 400044China School of Mechanical Engineering Suzhou University of Science and TechnologySuzhou 215009China

In recent years,a new class of metallic materials featuring heterogeneous structures has *** materials consist of distinct soft and hard domains with significant differences in mechanical properties,allowing them to maintain high strength while offering superior ***(Mg)alloys,renowned for their low density,high specific strength,exceptional vibration damping,and electromagnetic shielding properties,exhibit tremendous potential as lightweight and functional *** their advantageous properties,high-strength Mg alloys often suffer from limited ***,the emergence of heterogeneous materials provides a fresh perspective for the development of Mg alloys with both high strength and *** article provided a fundamental overview of heterostructured materials and systematically reviewed the recent research progress in the design of Mg alloys with strength-ductility balance based on heterostructure *** review encompassed various aspects,including preparation methods,formation mechanisms of diverse heterostructures,and mechanical properties,both within domestic and international *** this basis,the article discussed the challenges encountered in the design and fabrication of heterostructured Mg alloys,as well as the urgent issues that require attention and resolution in the future.©2024 Chongqing *** services provided by Elsevier *** behalf of KeAi Communications ***.

关键词： Mg alloys Heterogeneous structure Processing techniques Strength and ductility Hetero-deformation induced stress Strain gradient

A NUMERICAL STUDY ON SIDE HULL OPTIMIZATION FOR TRIMARAN

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Journal of Hydrodynamics 2011年第2期23卷 265-272页

作者： xu min zhang Shi-lian State Key Laboratory of Ocean Engineering Shanghai Jiao Tong University Shanghai 200240 China

Due to the interaction between the main hull and side hulls, different layouts and lengths of side hulls affect the wave loads significantly. Based on three-dimensional potential theory and Green＇s function, this article gives the significant values for wave loads, including vertical shear forces and vertical bending moments at different locations on the main hull, and transverse bending moments at the junction of the cross structure and main hull. In addition, a parametric optimization of wave loads for different layouts and lengths of side hulls were perfomed. Several speeds and wave headings were also considered. Finally, spectral analysis was conducted to attain load distribution. The conclusions of this study are conducive to the design and optimization of this new type of ship

关键词： trimaran three-dimensional potential theory wave loads optimization

Multi-instance partial-label learning: towards exploiting dual inexact supervision

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Science China(Information Sciences) 2024年第3期67卷 48-61页

作者： Wei TANG Weijia zhang min-Ling zhang School of Computer Science and Engineering Southeast University Key Laboratory of Computer Network and Information Integration (Southeast University) Ministry of Education School of Information and Physical Sciences The University of Newcastle

Weakly supervised machine learning algorithms are able to learn from ambiguous samples or labels, e.g., multi-instance learning or partial-label learning. However, in some real-world tasks, each training sample is associated with not only multiple instances but also a candidate label set that contains one groundtruth label and some false positive labels. Specifically, at least one instance pertains to the ground-truth label while no instance belongs to the false positive labels. In this paper, we formalize such problems as multi-instance partial-label learning(MIPL). Existing multi-instance learning algorithms and partial-label learning algorithms are suboptimal for solving MIPL problems since the former fails to disambiguate a candidate label set, and the latter cannot handle a multi-instance bag. To address these issues, a tailored algorithm named MIPLGP, i.e., multi-instance partial-label learning with Gaussian processes, is *** first assigns each instance with a candidate label set in an augmented label space, then transforms the candidate label set into a logarithmic space to yield the disambiguated and continuous labels via an exclusive disambiguation strategy, and last induces a model based on the Gaussian processes. Experimental results on various datasets validate that MIPLGP is superior to well-established multi-instance learning and partial-label learning algorithms for solving MIPL problems.

关键词： machine learning multi-instance partial-label learning multi-instance learning partial-label learning Gaussian processes

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