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Propagating subduction initiation of the Caroline Plate at the Mussau Trench

Science China Earth Sciences 2025年第1期68卷 253-269页

作者： chun-feng LI Yongkang DENG Tao WU Dongdong DONG Guoliang ZHANG Jiazheng ZHANG Yutao LIU Yaqing LI Fugui TANG Lulu ZHANG Department of Marine Sciences Zhejiang University Laboratory of Marine Mineral Resources Laoshan Laboratory Key Lab of Marine Geology and Environment Institute of Oceanology Chinese Academy of Sciences Key Lab of Ocean and Marginal Sea Geology South China Sea Institute of Oceanology Chinese Academy of Sciences Science & Technology on Integrated Information System Lab Institute of Software Chinese Academy of Sciences

New seismic imaging from the Mussau Trench confirms that, under horizontal compression on an oceanic plate boundary, it is within the young and weak oceanic plate that a trench will develop, and it is the young plate, not so long after its birth, that starts to subduct toward the old plate. The Mesozoic Pacific Plate cannot easily bend, under the joint horizontal compression and vertical gravity pull, even with a pre-existing weak zone in place and with a large age offset across the plate boundary. The bending of the Caroline Plate near the northern end of the Mussau Trench started only after a long-time span of trench migration, and/or after a prolonged transition from initial compression to trench development. Highly contrasting trench deformation and sedimentary accretion between two parallel seismic sections support an evident migration of underthrusting or significant longitudinal heterogeneity along the trench. The swift transition from underthrusting to non-thrusting can be explained by a counter-clockwise rotation of the Caroline Plate. That miniature accretionary wedges develop even before the subduction initiates imply strong compression and uplifting before the underthrusting can kick-start. Rotation of the Caroline Plate have been halted as the Mussau Trench is seismically rather quiet and the Lyra Trough to the east shows relaxational extension.

关键词： Mussau Trench Subduction initiation Seismic reflection Caroline Plate

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竞争环境下促进农产品质量改进的投资策略研究

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管理工程学报 2025年第2期39卷 190-205页

作者：何征张旭辉罗茂冯春西南交通大学交通运输与物流学院四川成都610000 攀枝花学院四川攀枝花617000

本文基于两条竞争的“公司+农户”农产品供应链,考虑质量改进具有边际收益递减和边际成本递增规律,分析投资主体、供应链竞争强度、市场价格质量敏感度、控本能力等多个因素对决策的影响,识别促进质量改进并实现供应链参与者双赢的博弈... 详细信息

本文基于两条竞争的“公司+农户”农产品供应链,考虑质量改进具有边际收益递减和边际成本递增规律,分析投资主体、供应链竞争强度、市场价格质量敏感度、控本能力等多个因素对决策的影响,识别促进质量改进并实现供应链参与者双赢的博弈均衡特征和占优均衡。研究发现:(1)在没有竞争的情况下,供应链应该通过投资改进质量;在有竞争时,供应链是否投资取决于两条供应链的控本能力差异。如果差异较大,能力弱的供应链应选择不投资。(2)当两条供应链采用不同的提质策略时,竞争强度、价格质量敏感度和提质者控本能力的增加都会扩大双方的利润差距。(3)投资主体和质量改进决策主体保持一致的决策机制能够保证投资的激励相容,促使供应链成员主动投资从而改进质量。(4)竞争能够降低供应链非合作代价,提升供应链效率。

关键词：质量改进竞争供应链订单农业供应链效率

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Reversible Plasticity Shape Memory Effect in SEBS/Crystallizable Paraffin: Influence of Paraffin Content

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Chinese Journal of Polymer Science 2022年第12期40卷 1697-1705,I0011页

作者： Shao-Quan Zhao Jia-chun feng State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceFudan UniversityShanghai 200433China Yiwu Research Institute of Fudan University Yiwu 322000China

Polymers with reversible plasticity shape memory effect(RPSME)have attracted considerable attention due to their simple programming and large ***,the exact mechanisms of RPSME are still not thoroughly *** this work,the RPSME of SEBS/crystallizable paraffin was investigated by comparatively analyzing the performances and microstructures of samples with different paraffin *** was found the shape fixing ratios(Rfs)of samples increased with the paraffin content,and interestingly,a significant improvement in Rf was observed when the paraffin content exceeded 60 wt%.Tensile test results showed that the deformation characteristics of samples changed from elastic to plastic as the paraffin content increased above 60 wt%.By exploring the crystallization behaviors of paraffin in various SEBS/paraffin samples,it was revealed that the microstructures of SEBS/paraffin were different when the paraffin content was below 50 wt%and above 60 wt%.In samples with low paraffin content(below 50 wt%),nearly all paraffin was co-crystallized with ethylene-co-butylene(EB)chains and its crystallization was severely restricted;while in samples with high paraffin content(above 60 wt%),“excess”paraffin appeared and this part of paraffin crystallized on the template of the EB/paraffin co-crystals,which might be responsible for the elastic-to-plastic transition and the sharp increase in *** on the above results,a possible structural model was proposed to explain the exact mechanism of RPSME in SEBS/paraffin.

关键词： Reversible plasticity shape memory effect Poly(styrene-b-(ethylene-co-butylene)-b-styrene) Crystallizable paraffin Paraffin content

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Numerical simulation of phosphorus release from resuspended sediment

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Acta Mechanica Sinica 2020年第6期36卷 1191-1201,I0001页

作者： Pengda Cheng Xinquan Wang chun feng Institute of Mechanics Chinese Academy of SciencesBeijing100190China University of Chinese Academy of Sciences Beijing100049China

One of the main issues in environmental hydraulics is pollutant release from *** instance,the strong affinity between phosphorus and sediment permits most of the phosphorus to be adsorbed on the surface of the sediment particles in rivers or *** sediment resuspension,phosphorus is desorbed from the sediment to the overlying *** release of phosphorus from the resuspended sediment is an important process in the secondary pollution of ***,a coupled mechanical model of the overlying water,sediment,and pollutant was established based on the experimentally gathered *** types of sediment with different adsorption and desorption characteristics were selected to simulate the process of sediment resuspension and phosphorus release under different hydrodynamic *** simulation results were subsequently used to analyze the relationship between the flow field characteristics and phosphorus concentration,from which the relationships between velocity,particle volume fraction,turbulent kinetic energy,total phosphorus concentration,desorbed phosphorus concentration,and time were *** on the results,phosphorus is rapidly released into the overlying water from the resuspended sediment,and it reaches a peak value in a short *** the release process of non-adsorption pollutants,hydrodynamic conditions and sediment properties play a crucial role in the phosphorus release *** turbulent kinetic energy rapidly increases with the flow velocity,whereas the desorbed phosphorus concentration exhibits a certain relationship with the particle volume fraction and turbulent kinetic *** particular,the turbulent kinetic energy increases the desorbed phosphorus concentration per unit ***,the time taken by the total phosphorus concentration to attain its peak value is closely related to the characteristics of the flow field,whereas the amount of phosphorus is closely related to sediment *** sedi

关键词： Resuspended sediment Adsorption Desorption Turbulent kinetic energy Phosphorus

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Sepsis heterogeneity

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World Journal of Pediatrics 2023年第10期19卷 919-927页

作者： Wei Wang chun-feng Liu Department of Pediatrics ShengJing Hospital of China Medical UniversityNo.36SanHao StreetShenyang CityLiaoning Province 110004China

Background Sepsis is a life-threatening organ dysfunction caused by a dysregulated host response to infection,with extremely high ***,sepsis is a heterogeneous syndrome characterized by a vast,multidimensional array of clinical and biologic features,which has hindered advances in the therapeutic field beyond the current *** sources We used PubMed to search the subject-related medical literature by searching for the following single and/or combination keywords:sepsis,heterogeneity,personalized treatment,host response,infection,epidemiology,mortality,incidence,age,children,sex,comorbidities,gene susceptibility,infection sites,bacteria,fungi,virus,host response,organ dysfunction and *** We found that host factors(age,biological sex,comorbidities,and genetics),infection etiology,host response dysregulation and multiple organ dysfunctions can all result in different disease manifestations,progression,and response to treatment,which make it difficult to effectively treat and manage sepsis *** Herein,we have summarized contributing factors to sepsis heterogeneity,including host factors,infection etiology,host response dysregulation,and multiple organ dysfunctions,from the key elements of pathogenesis of *** in-depth understanding of the factors that contribute to the heterogeneity of sepsis will help clinicians understand the complexity of sepsis and enable researchers to conduct more personalized clinical studies for homogenous patients.

关键词： Heterogeneity Host response Infection Personalized treatment Sepsis

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H'-splittings of Seifert Manifolds with Boundary

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Acta Mathematica Sinica,English Series 2023年第4期39卷 695-706页

作者： Yan XU feng chun LEI feng Ling LI School of Mathematical Sciences Dalian University of TechnologyDalian 116024P.R.China

It is known that each compact connected orient able 3-manifold M with boundary admits an H’-splitting H1∪FH2,where F is a compact connected orientable surface properly embedded in M and splits M into two handlbodies H_(1) and H_(2).In this paper,we show that a non-completely L-reducible and minimal H’-splitting surface for a compact connected irreducible orientable anannular Seifert 3-manifold with boundary is horizontal,and give a necessary and sufficient condition for an amalgamation of two compact connected orientable 3-manifolds along a compact connected surface to be a Seifert manifold with boundary,and describe a characteristic of some H’-splittings to denote a Seifert 3-manifold with *** a compact connected orientable Seifert manifold M with a semi-bundle structure M_(1)∪_(F)M_(2),we give an upper bound of the genus of the base surface.

关键词： Seifert manifold H'-splitting vertical or horizontal surface amalgamated 3-manifold

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Quantitative characterization of damage-aggravation effect caused by progressive damage

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Acta Mechanica Sinica 2021年第2期37卷 349-365页

作者： Qindong Lin Shihai Li chun feng Dong Zhou Key Laboratory for Mechanics in Fluid Solid Coupling Systems Institute of MechanicsChinese Academy of SciencesBeijing 100190China School of Engineering Science University of Chinese Academy of SciencesBeijing 100049China

Aiming at the progressive damage phenomenon in geotechnical field,it attempts to study the effect of progressive damage on the macro-bearing ***,based on the theoretical analysis of a two-dimensional plane inside representative volume element,it is proposed that progressive damage will occur if the bearing capacity of microplanes is ***,“damage-aggravation effect”is proposed according to the difference between the macro-bearing capacity of entire plane and the sum of bearing capacity of all microplanes when progressive damage ***,progressive damage ratio K_(t)is proposed to quantify“damage-aggravation effect”.Finally,based on the rod model,the correspondence between K_(t),and some influence factors is studied by theoretical analysis and numerical *** results show that“damage-aggravation effect”does exist,and the macro-bearing capacity of entire plane is less than the sum of bearing capacity of all microplanes when progressive damage *** the bearing capacity of rods in the rod model obeys uniform distribution,as the minimum of bearing capacity increases linearly,the macro-bearing capacity increases linearly,and K_(t)decreases inversely.

关键词： Progressive damage Bearing strength Damage-aggravation effect Progressive damage ratio

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SD-splittings for Some Bordered 3-Manifolds

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Acta Mathematica Sinica,English Series 2006年第5期22卷 1481-1484页

作者： feng chun LEI Yang LI Department of Mathematics Harbin Institute of Technology Harbin 150001 P. R. China

In the present paper, we characterize the bordered 3-manifolds with genus 1 D-splittings and SD-splittings. We also describe a minimal genus SD-splitting for a handlebody and surface × I.

关键词： handlebody SD-splitting genus of SD-splitting

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Ellagic acid inhibits gastric cancer cells by modulating oxidative stress and inducing apoptosis

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Asian Pacific Journal of Tropical Biomedicine 2024年第4期14卷 162-169页

作者： Jian Zheng chun-feng Li Department of Diagnostic Radiology Division Harbin Medical University Cancer HospitalHeilongjiangChina Department of Gastrointestinal Surgical Ward Harbin Medical University Cancer HospitalHeilongjiangChina

Objective:To evaluate the anticancer effect of ellagic acid on gastric cancer ***:MTT assay was used to evaluate the effect of ellagic acid at different concentrations(0.5-100μg/mL)on gastric cancer AGS ***-qPCR and Western blot analyses were applied to assess apoptosis(BCL-2,CASP-3,and BAX)and autophagy(LC3,ATG5,and BECN1)in AGS cells treated with ellagic *** expression of invasion-related markers including TP53,CDKN2A,and PTEN was *** addition,cell cycle markers including cyclin A,B,D,and E were measured by *** stress markers were evaluated using ***:Ellagic acid inhibited the proliferation of AGS cells in a concentration-and time-dependent *** expression of BCL-2 was significantly decreased(P0.05).Moreover,the oxidative stress markers including SOD,TAC,and MDA were increased by ellagic acid(P<0.01).Conclusions:Ellagic acid can inhibit cell proliferation,induce apoptosis,and modulate oxidative stress in AGS ***,further in vivo and molecular studies are needed to verify its anticancer efficacy.

关键词： Ellagic acid Gastric cancer Apoptosis Autophagy Metastasis Proliferation

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Pollen-Ovule Ratio and Gamete Investment in Pedicularis （Orobanchaceae）

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Journal of Integrative Plant Biology 2007年第2期49卷 238-245页

作者： chun-feng Yang You-Hao Guo College of Life Sciences Wuhan University Wuhan 430072 China

The Pedicularis species provides ideal materials to study floral evolution because of their substantial flower variation based on a narrow genetic basis, even though they are almost exclusively pollinated by bumblebee. These traits allow us to detect the evolutionary trends of floral parameters without considering genetic background and the difference of pollination vectors. The pollen-ovule ratio is widely used to estimate the pattern of resource investment in two sexual functions in flowering plants. Forty species representing all of the corolla types in Pedicularls were used to study pollen-ovule ratio, gamete investment, and their correlations. Results show that pollen-ovule ratio does not differ among both different corolla types and taxonomic groups. It is therefore suggested that pollen-ovule ratio should be a parallel evolution. The correlations between pollen-ovule ratio and pollen size （-）, and ovule size （＋） can be successfully explained in terms of sex allocation theory. The biological significance of such relationships was also discussed. Additionally, we analyzed the pattern of resource investment into female gamete, which has been somewhat neglected, and found that plants have different patterns of gamete investment between the two sexual functions.

关键词： gamete investment ovule size Pedicularis pollen-ovule ratio pollen size pollination sex allocation.

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