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Quaternary Intrusions from the Zhongjiannan Basin,South China Sea:Their Relationship with the Hainan Mantle Plume and Influence on Hydrocarbon Reservoirs

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Acta Geologica Sinica(English Edition) 2023年第1期97卷 376-392页

作者： HE Yanxin LIU Jianping WANG Lei tian wei Key Laboratory of Orogenic Belts and Crustal Evolution MOESchool of Earth and Space SciencesPeking UniversityBeijing 100871China School of Petroleum Engineering Chongqing University of Science and TechnologyChongqing 401331China Guangzhou Marine Geological Survey Ministry of Natural ResourcesGuangzhou 510760China School of Marine Sciences Sun Yat-sen UniversityZhuhai 519000China

The transportation of magma in sedimentary basins often occurs through extensive dyke-sill networks.The role of sills on the plumbing system in rifted margins and the impact of sills on hydrocarbon reservoirs of prospective sedimentary basins has long been an area of great industrial interest and scientific debate.Based on 2D seismic reflection,we present data on how the sills emplaced to form a magmatic plumbing system of the volcanic system for the Zhongjiannan Basin(ZJNB).The results show that sixty-nine sills and fourteen forced folds have been identified.The distribution and geometry of the sills suggest that magma flowed from west to east and then ascended to near the surface.The onlap relationship of the forced folds indicates that the timing of magmatic activities can be constrained at ca.0.2 Ma.The spatial and temporal occurrences of intrusions imply that the strong post-rift magmatism in ZJNB was associated with the Hainan mantle plume arising from the core-mantle boundary.Furthermore,these forced folds could produce several types of hydrocarbon traps,due to accommodation through bending and uplift of the overlying rock and free surface,but it is critical to evaluate the effect of such emplacement when setting exploration targets.

关键词： sill intrusions forced fold petroleum traps Hainan mantle plume Zhongjiannan basin

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Carbon Enrichment in the Lithospheric Mantle:Evidence from the Melt Inclusions in Mantle Xenoliths from the Hainan Basalts

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Acta Geologica Sinica(English Edition) 2023年第1期97卷 358-375页

作者： XU Xin tian wei ZHANG Lifei LI Huijuan The Key Laboratory of Orogenic Belts and Crustal Evolution Ministry of EducationSchool of Earth and Space SciencesPeking UniversityBeijing 100871China

It is generally believed that the lithospheric mantle and the mantle transition zone are important carbon reservoirs.However,the location of carbon storage in Earth's interior and the reasons for carbon enrichment remain unclear.In this study,we report CO_(2)-rich olivine-hosted melt inclusions in the mantle xenoliths of late Cenozoic basalts from the Penglai area,Hainan Province,which may shed some light on the carbon enrichment process in the lithospheric mantle.We also present a detailed petrological and geochemical investigation of the late Cenozoic basalts and mantle xenoliths from northern Hainan Island.The collected samples of late Cenozoic Hainan Island basalts belong to both alkaline and subalkaline series,showing fractionated REE patterns with high(La/Yb)_(N)values of 3.52–11.77,which are typical for OIB.Based on Al-in-olivine thermometry,the temperatures estimated for the mantle xenoliths can be divided into two groups.One group has temperatures of less than 1050℃,and the other group has temperature ranging from 1050℃to 1282℃.Clinopyroxene(La/Yb)_(N)–Ti/Eu and clinopyroxene Ca/Al–Mg^(#)diagrams indicate that the mantle peridotite experienced metasomatism from both silicate and carbonate melts.Melt inclusions in the olivine of mantle xenoliths include(1)CO_(2)bubble–rich melt inclusions;(2)multiphase melt inclusions(glass+CO_(2)bubble+daughter minerals);(3)pure glass melt inclusions.Magnesite is a daughter mineral in the olivine-hosted melt inclusions,which could be interpreted as a secondary mineral formed by the interactions of CO_(2)-rich fluids with an olivine host,due to post-entrapment effects.The glasses in olivine-hosted melt inclusions have high SiO_(2)contents(60.21–77.72 wt%).Our results suggest that a considerable amount of CO_(2)-rich melt inclusions are captured in the lithospheric mantle during metasomatism.The lithospheric mantle can therefore act as is a‘carbon trap',with much CO_(2)being absorbed by the lithospheric mantle in this way.

关键词： melt inclusions lithospheric mantle metasomatism carbon trap Hainan Island

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Superlinear Elliptic Equation with Mixed Boundary Value in Annular Domain

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Acta Mathematica Sinica,English Series 2021年第10期37卷 1549-1559页

作者： Jian tian Yuan Hong wei School of Mathematics Jilin UniversityChangchun 130012P.R.China

In this paper,we study superlinear elliptic equations with mixed boundary value conditions in annular domains.It is assumed that the nonlinearities depend on the derivative terms.Some results about existence of soluti... 详细信息

关键词： Mixed boundary value annular domain radial solution gradient term iterative method

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Micro powder injection molding of boron carbide components with SiC-Al_(2)O_(3)-Y_(2)O_(3)sintering additives

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Chinese Journal of Aeronautics 2022年第5期35卷 429-440页

作者： Changrui WANG Zhiyou LI Wei Tian Yuxian LI Lina TANG Qilong PANG Minghe CHEN National Key Laboratory of Science and Technology on Helicopter Transmission Nanjing University of Aeronautics and AstronauticsNanjing 210016China Ji’nan Technician College Jinan 250000China Shanghai Aerospace Equipments Manufacturer Co.Ltd. Shanghai 200245China College of Mechanical and Electrical Engineering Nanjing Forestry UniversityNanjing 210037China

Sintering additives and micro-powder injection molding offer an effective method to densify boron carbide(B_(4)C)and make B_(4)C components with complex shapes.By adjusting the proportion of three kinds of powders(SiC,Al_(2)O_(3)and Y_(2)O_(3)),four kinds of sintering additives were prepared.The feedstock uniformity,debinding behavior,phase composition and microstructure of micro injection molded B_(4)C components with different sintering additives were studied.The results showed that the defects such as lattice distortion and vacancy were introduced into ball milling,which increase the surface energy and benefit subsequent sintering densification.The feedstock had good uniformity and rheology that met the requirements of micro powder injection molding.After debinding,B_(4)C components had enough strength and showed certain sintering characteristics.The addition of sintering additives was beneficial to densification and sintering temperature reduction.The addition of sintering additives formed a second phase in the B_(4)C crystal and at the grain boundary of B_(4)C crystal,which changed the fracture mode from transgranular fracture to mixed fracture mechanism with transgranular fracture.

关键词： Composite materials Fracture Injection molding Microstructure Phase composition

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Sparse Tensor Prior for Hyperspectral,Multispectral,and Panchromatic Image Fusion

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IEEE/CAA Journal of Automatica Sinica 2023年第1期10卷 284-286页

作者： Xin tian wei Zhang Dian Yu Jiayi Ma the Electronic Information School Wuhan UniversityWuhan 430072China

Dear Editor, This letter is concerned with a new hyperspectral fusion paradigm by simultaneously fusing hyperspectral, multispectral, and panchromatic images. Seeking an efficient prior about the target hyperspectral image(HSI), is vital for constructing an accurate fusion model in this problem. To this end, this work suggests a novel sparse tensor prior using patch-based sparse tensor dictionary learning.

关键词： spectral patch concerned

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Integrated Data Reveal the Flavonoid Biosynthesis Metabolic Pathway in Semen Ziziphi Spinosae Using Transcriptomic and Metabolomic

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Phyton-International Journal of Experimental Botany 2023年第2期92卷 369-382页

作者： Wei Tian Lingdi Liu Zhongxing Song Zhishu Tang Chunxiu Wen Tao Jiang Institute of Cash Crops Hebei Academy of Agricultural and Forestry SciencesShijiazhuang050051China State Key Laboratory of Research&Development of Characteristic Qin Medicine Resources(Cultivation) Shaanxi University of Chinese MedicineXianyang712046China

The extract from Semen Ziziphi Spinosae(SZS)contains many secondary metabolites(flavonoids,alkaloids,and terpenoids),widely reported for their high medicinal value.In order to know the number and type of flavonoids and the regulating mechanism of flavonoid biosynthesis during the growth and development of SZS,we identified and analyzed the flavonoid metabolites and genes in SZS using metabolomic and transcriptomic.A total of 13,232 differentially expressed genes and 83 flavonoid metabolites were identified at three different growth and development stages(T1,T2,and T3)of SZS.The main flavonoid metabolic components of SZS were catechin,L-epicatechin,(–)-epigallocatechin,(+)-gallocatechin,spinosin and its derivatives.A total of 53 unigenes encoding 15 enzymes were identified as candidate genes involved in flavonoid biosynthesis in SZS.Among,PAL,C4H,4CL,CHS,CHI,FLS,FNS,ANS,ANR,LAR,and UFGT genes were all downregulated in T3 than in T1.The expression levels of these genes influence the accumulation of flavonoids in SZS.Our results should provide valuable information for flavonoid metabolites and candidate genes involved in flavonoid biosynthesis on SZS .

关键词： Spinosin secondary metabolites transcriptomic metabolomic gene expression

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A new oxyapatite red phosphor Eu^(3+)-doped Ca_(3)Y_(7)(BO_(4))(SiO_(4))_(5)O:Synthesis,structure and luminescence properties

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Journal of Rare Earths 2022年第5期40卷 709-716,I0002页

作者： tian tian wei Liu Qi Liu Yan Zhang Yaoqing Chu Gan Liu Jiayue Xu Institute of Crystal Growth School of Materials Science and EngineeringShanghai Institute of TechnologyShanghai 201418China Jiangsu Technology Innovation&C-V2X Academy Co. Ltd.Nanjing 210014China

A series of new oxyapatite red phosphors Ca_(3) Y_(7)(BO_(4)) (SiO_(4))_(5) O doped with different concentrations of Eu^(3+)were successfully synthesized by high temperature solid state method.The X-ray diffraction(XRD)Rietveld refinement results show that the structure of the phosphor belongs to space group P6_(3)/m and Eu^(3+)ion replaces Y^(3+)ion.The emission spectrum consists of the characteristic emission peaks corresponding to Eu^(3+)under the excitation of 274 nm and the dominant emission peak is at 614 nm(^(5)D_(0)→^(7)F_(2) of Eu^(3+)).The concentration quenching effect occurs and the optimized Eu^(3+)concentration is 4.0 mol%.The energy level diagram for luminous mechanism is also given and the non-radiative energy transfer mechanism between Eu^(3+)is mainly exchange interaction.The CIE coordinate is close to the ideal red light and the color purity is higher than 99.79%.Moreover,the phosphor exhibits moderate thermal stability because the photoluminescence intensity at 423 K is still maintained at higher than 78.97%of that at room temperature.The internal quantum efficiency of Ca_(3) Y_(7)(BO_(4)) (SiO_(4))_(5) O:4.0 mol%Eu^(3+)phosphor is 58.2%.A red light emitting diode(LED)device based on it can emit bright red light.The CCT values of the device are basically unchanged when driven by various bias current.The results show that Ca_(3) Y_(7)(BO_(4)) (SiO_(4))_(5) O:Eu^(3+)is a new type of oxyapatite red fluorescent material with good comprehensive performances.

关键词： Red phosphor Oxyapatite structure Eu3+ions doping LED device Rare earths

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Current advances for bone regeneration based on tissue engineering strategies

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Frontiers of Medicine 2019年第2期13卷 160-188页

作者： Rui Shi Yuelong Huang Chi Ma Chengai Wu Wei Tian Institute of Traumatology and Orthopaedics Beijing Laboratory of Biomedical MaterialsBeijing Jishuitan HospitalBeijing 100035 China Department of Spine Surgery of Beijing Jishuitan Hospital The Fourth Clinical Medical College of Peking UniversityBeijing 100035China

Bone tissue engineering (BTE) is a rapidly developing strategy for repairing critical-sized bone defects to address the unmet need for bone augmentation and skeletal repair. Effective therapies for bone regeneration primarily require the coordinated combination of innovative scaffolds, seed cells, and biological factors. However, current techniques in bone tissue engineering have not yet reached valid translation into clinical applications because of several limitations, such as weaker osteogenic differentiation, inadequate vascularization of scaffolds, and inefficient growth factor delivery. Therefore, further standardized protocols and innovative measures are required to overcome these shortcomings and facilitate the clinical application of these techniques to enhance bone regeneration. Given the deficiency of comprehensive studies in the development in BTE, our review systematically introduces the new types of biomimetic and bifunctional scaffolds. We describe the cell sources, biology of seed cells, growth factors, vascular development, and the interactions of relevant molecules. Furthermore, we discuss the challenges and perspectives that may propel the direction of future clinical delivery in bone regeneration.

关键词： bone tissue engineering stem cell bone scaffold growth factor bone regeneration

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Robust adaptive radar beamforming based on iterative training sample selection using kurtosis of generalized inner product statistics

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Journal of Systems Engineering and Electronics 2024年第1期35卷 24-30页

作者： tian Jing ZHANG wei School of Information and Electronics Beijing Institute of TechnologyBeijing 100081China National Key Laboratory of Electromagnetic Space Security Chengdu 610036China

In engineering application,there is only one adaptive weights estimated by most of traditional early warning radars for adaptive interference suppression in a pulse reputation interval(PRI).Therefore,if the training samples used to calculate the weight vector does not contain the jamming,then the jamming cannot be removed by adaptive spatial filtering.If the weight vector is constantly updated in the range dimension,the training data may contain target echo signals,resulting in signal cancellation effect.To cope with the situation that the training samples are contaminated by target signal,an iterative training sample selection method based on non-homogeneous detector(NHD)is proposed in this paper for updating the weight vector in entire range dimension.The principle is presented,and the validity is proven by simulation results.

关键词： adaptive radar beamforming training sample selection non-homogeneous detector electronic jamming jamming suppression

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Antifouling Technology Trends in Marine Environmental Protection

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Journal of Bionic Engineering 2021年第2期18卷 239-263页

作者： Limei tian Yue Yin wei Bing E Jin Key Laboratory of Bionic Engineering Ministry of EducationJilin UniversityChangchun 130022China weihai Institute for Bionics-Jilin University Weihai 264207China School of Chemistry and Life Science Changchun University of TechnologyChangchun 130012China

Marine fouling is a worldwide problem,which is harmful to the global marine ecological environment and economic benefits.The traditional antifouling strategy usually uses toxic antifouling agents,which gradually exposes a serious environmental problem.Therefore,green,long-term,broad-spectrum and eco-friendly antifouling technologies have been the main target of engineers and researchers.In recent years,many eco-friendly antifouling technologies with broad application prospects have been developed based on the low toxicity and non-toxicity antifouling agents and materials.In this review,contemporary eco-friendly antifouling technologies and materials are summarized into bionic antifouling and non-bionic antifouling strategies(2000-2020).Non-bionic antifouling technologies mainly include protein resistant polymers,antifoulant releasing coatings,foul release coatings,conductive antifouling coatings and photodynamic antifouling technology.Bionic antifouling technologies mainly include the simulated shark skin,whale skin,dolphin skin,coral tentacles,lotus leaves and other biology structures.Brief future research directions and challenges are also discussed in the end,and we expect that this review would boost the development of marine antifouling technologies.

关键词： biofouling antifouling technologies bionic non-bionic biofilm

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