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海洋沉积物的锌同位素地球化学及其应用

地球科学 2021年第11期46卷 4097-4106页

作者：瞿瑗汝吕逸文刘盛遨中国地质大学地质过程与矿产资源国家重点实验室北京100083

锌同位素体系是海洋地球化学研究的新示踪剂,应用于示踪海水中锌元素的来源及其运移过程.海洋沉积物作为锌元素重要的"源"与/或"汇",其锌同位素组成的研究有助于理解海洋锌元素的地球化学循环.海洋沉积物记录了海水组成的信息,可以反演... 详细信息

锌同位素体系是海洋地球化学研究的新示踪剂,应用于示踪海水中锌元素的来源及其运移过程.海洋沉积物作为锌元素重要的"源"与/或"汇",其锌同位素组成的研究有助于理解海洋锌元素的地球化学循环.海洋沉积物记录了海水组成的信息,可以反演古海水锌同位素组成的变化,前提是理解沉积物与海水之间的分馏.对海水及海洋不同储库锌同位素研究进行系统总结,包括河流输入、热液体系、不同类型海洋沉积物(如富碳酸盐的沉积物、陆源硅酸盐碎屑、硅质沉积物、铁锰结核、贫氧-缺氧沉积物)的锌同位素组成,阐述了海洋沉积物锌同位素组成变化在古气候、古环境重建以及古海洋学等领域的应用以及重要性.

关键词：海洋沉积物锌同位素海洋地球化学循环古气候地球化学

熔融高炉渣液滴撞击壁面动态行为及相变换热特性的数值模拟

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工程热物理学报 2022年第5期43卷 1337-1344页

作者：向宇豪朱恂王宏吕义文丁玉栋廖强重庆大学工程热物理研究所重庆大学能源与动力工程学院重庆400030 重庆大学低品位能源利用及系统教育部重点实验室重庆400030

离心粒化余热回收技术是最具前景的可同时实现高炉熔渣余热回收和炉渣资源利用的技术,其中熔渣液滴撞击壁面的换热过程是该技术中关键过程之一。本文首次对耦合相变换热和结晶行为的熔融高炉渣液滴撞击壁面过程建立了数值模型,模拟研究... 详细信息

离心粒化余热回收技术是最具前景的可同时实现高炉熔渣余热回收和炉渣资源利用的技术,其中熔渣液滴撞击壁面的换热过程是该技术中关键过程之一。本文首次对耦合相变换热和结晶行为的熔融高炉渣液滴撞击壁面过程建立了数值模型,模拟研究了不同液滴直径、撞击速度和壁面条件下熔融高炉渣液滴撞击壁面的动态行为、换热和结晶特性。结果表明:熔渣液滴直径增大对防黏接和增强换热均不利;高撞击速度有利于增强熔渣换热但显著增大了铺展面积;壁面温度以及材质的导热系数对冷却渣的结晶量影响较大,其中导热系数是最主要的影响因素。

关键词：高炉渣液滴撞击数值模拟

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二氢杨梅素固体自微乳的制备及表征

食品科学 2022年第16期43卷 145-152页

作者：黄娟岳晶晶冯璇王立增褚兰玲解文静张佳靓吕奕文常熟理工学院生物与食品工程学院江苏常熟215500 南京林业大学轻工与食品学院江苏南京210037 宏胜饮料集团有限公司浙江杭州311200

为改善二氢杨梅素的稳定性和溶解度、提高生物利用度,采用二氧化硅物理吸附的方式制备二氢杨梅素固体自微乳。二氧化硅和液体自微乳质量比≥0.6时,制备得到白色疏松粉末状的固体自微乳具有较好的流动性。制得的固体自微乳中二氢杨梅素... 详细信息

为改善二氢杨梅素的稳定性和溶解度、提高生物利用度,采用二氧化硅物理吸附的方式制备二氢杨梅素固体自微乳。二氧化硅和液体自微乳质量比≥0.6时,制备得到白色疏松粉末状的固体自微乳具有较好的流动性。制得的固体自微乳中二氢杨梅素质量分数为(0.30±0.03)%。X射线衍射分析与红外光谱分析显示,二氢杨梅素以无定形或溶解态存在于样品中,液体自微乳以物理吸附的形式吸附进二氧化硅孔洞。体外释放结果表明,液体和固体自微乳的释放时间延长,可持续释放8 h以上,二氧化硅在一定程度上抑制二氢杨梅素的释放,起到缓释作用。体外模拟胃肠消化表明,固体自微乳的主要消化部位在肠道。经模拟胃肠消化后,自微乳中二氢杨梅素的生物可给率由原料的34.01%提高到70%以上,表明自微乳可提高活性物的肠道吸收利用。液体自微乳固体化后二氢杨梅素的生物可给率出现一定程度的下降,这是由于液体自微乳不能及时从二氧化硅的孔穴中溶解释放,二氧化硅固体化可延长二氢杨梅素的消化吸收。固体自微乳可改善二氢杨梅素的化学稳定性。

关键词：二氢杨梅素固体自微乳体外释放模拟消化

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论受教唆(帮助)的被监护人致人损害时多方主体的责任分担

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河南财经政法大学学报 2025年第1期40卷 46-59页

作者：李怡雯北京大学法学院北京100871

《民法典侵权责任编解释(一)》第十三条明确教唆人、帮助人与监护人、受托人间的责任分担按照其第十条和第十二条规定处理,可以分为三个层次。第一,教唆人、帮助人承担全部责任,应当限制在教唆人、帮助人对损害的发生具有全部的原因力... 详细信息

《民法典侵权责任编解释(一)》第十三条明确教唆人、帮助人与监护人、受托人间的责任分担按照其第十条和第十二条规定处理,可以分为三个层次。第一,教唆人、帮助人承担全部责任,应当限制在教唆人、帮助人对损害的发生具有全部的原因力且主观上属于故意的情况。教唆人、帮助人承担全部责任后,可以向有过错的监护人追偿。第二,监护人未尽到监护职责承担责任,属于自己责任,无权向教唆人、帮助人追偿,但可以向有偿合同中有过错的受托人、无偿合同中重大过失的受托人追偿。赔偿时,可以先从被监护人财产中支付,不足部分由监护人支付。因此,追偿回来的费用也应当先给被监护人。第三,受托人与监护人系同一序列,是在其自身未按照委托合同约定或者未履行监护职责的范围内承担责任。按照单向连带责任的原理,受托人无权向监护人追偿,但是基于《民法典》第九百二十九条委托合同的规则,无偿委托合同中具有一般过失的受托人可以向监护人追偿。

关键词：教唆帮助委托监护追偿单向连带责任

道德概念是一种HPC概念吗?——浅议厚道德概念与道德概念自然化

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北京科技大学学报（社会科学版） 2025年第1期41卷 129-136页

作者：王奕文中国人民大学哲学院北京100872

道德概念与自然概念的关系是元伦理学领域的重要议题,自然主义者同意道德概念可以通过自然概念说明却被摩尔批判为“自然主义谬误”,博伊德提出属性稳态丛聚理论(homeostatic property cluster,以下简称HPC)以规避该批评。定义HPC类词... 详细信息

道德概念与自然概念的关系是元伦理学领域的重要议题,自然主义者同意道德概念可以通过自然概念说明却被摩尔批判为“自然主义谬误”,博伊德提出属性稳态丛聚理论(homeostatic property cluster,以下简称HPC)以规避该批评。定义HPC类词项的内在属性间应具有因果联系,但对“善”概念进行的两个思想实验证明“善”概念不具有归纳推理适宜性,这意味着薄道德概念难以具备成为HPC概念的必要条件。厚道德概念由于含有丰富的描述性内容更有利于归纳。文章试将厚道德概念作为HPC概念定义并确定其丛聚属性,以维护部分道德概念的自然性、彰显道德概念的历史与社会维度。

关键词： HPC概念厚概念道德自然主义实在论

Decoherence-free subspace and entanglement sudden death of multi-photon polarization states in fiber channels

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Communications in Theoretical Physics 2023年第4期75卷 24-33页

作者： yiwen liu School of Physics Peking UniversityBeijing10087China

The construction of quantum networks requires long-distance teleportation of multi-qubit entangled ***,we investigate the entanglement dynamics of GHZ and W states in fiber *** a fiber channel,the two most important phenomena that affect polarization entanglement are polarization mode dispersion(PMD)and polarization-dependent loss(PDl).We theoretically characterize how PMD and PDl vectors affect three-qubit *** particular,upon quantifying the entanglement at the output states using concurrence and entanglement witnesses,we reveal the occurrence of entanglement sudden death and the appearance of decoherence-free subspaces in tripartite ***,we explore the evolution of GHZ and W state with an arbitrary number of photons in a fiber network and discuss the decoherence mechanism of the 4-party cluster state.

关键词： multi-photon entanglement decoherence polarization mode dispersion polarizationdependent loss decoherence-free subspace entanglement sudden death

A proteomics study to explore the role of adsorbed serum proteins for PC12 cell adhesion and growth on chitosan and collagen/chitosan surfaces

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Regenerative Biomaterials 2018年第5期5卷 261-273页

作者： Xiaoying lü Heng Zhang Yan Huang yiwen Zhang State Key laboratory of Bioelectronics School of Biological Science and Medical EngineeringSoutheast UniversityNanjing 210096P.R.China SQ Medical Device Co. Ltd.Nanjing 210008P.R.China

The aim of this article is to apply proteomics in the comparison of the molecular mechanisms of PC12 cell adhesion and growth mediated by the adsorbed serum proteins on the surfaces of chitosan and collagen/chitosan ***,the chitosan and the collagen/chitosan films were prepared by spin coating;and their surface morphologies were characterized by scanning electron microscopy,X-ray energy dispersive spectroscopy,contact angle measurement and Fourier transform infrared ***,cell proliferation experiments on two materials were performed and the dynamic curves of protein adsorption on their surfaces were ***,proteomics and bioinformatics were used to analyze and compare the adsorbed serum proteins on the surfaces of two biomaterials;and their effects on cell adhesion were *** results showed that the optimum concentration of chitosan film was 2%w/*** compared with chitosan film,collagen/chitosan film promoted the growth and proliferation of PC12 cells more *** the dynamic curves showed no significant difference in the total amount of the adsorbed proteins on both surfaces,proteomics and bioinformatics analyses revealed a difference in protein types:the chitosan surface adsorbed more vitronectin whereas collagen/chitosan surface adsorbed more fibronectin 1 and contained more cell surface receptor binding sites and more leu-Asp-Val sequences in its surface structure;the collagen/chitosan surface were more conducive to promoting cell adhesion and growth.

关键词： chitosan and collagen/chitosan film cell adhesion and growth protein adsorption proteomics/bioinformatics

Improving the spaceborne GNSS-R altimetric precision based on the novel multilayer feedforward neural network weighted joint prediction model

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Defence Technology（防务技术） 2024年第2期32卷 271-284页

作者： yiwen Zhang Wei Zheng Zongqiang liu Qian Xuesen laboratory of Space Technology China Academy of Space TechnologyBeijing 100094China China Academy of Aerospace Science and Innovation Beijing 100176China State Key laboratory of Space-Ground Integrated Information Technology Beijing Institute of Satellite Information EngineeringBeijing 100194China

Global navigation satellite system-reflection(GNSS-R)sea surface altimetry based on satellite constellation platforms has become a new research direction and inevitable trend,which can meet the altimetric precision at the global scale required for underwater *** present,there are still research gaps for GNSS-R altimetry under this mode,and its altimetric capability cannot be specifically ***,GNSS-R satellite constellations that meet the global altimetry needs to be ***,the matching precision prediction model needs to be established to quantitatively predict the GNSS-R constellation altimetric ***,the GNSS-R constellations altimetric precision under different configuration parameters is calculated,and the mechanism of the influence of orbital altitude,orbital inclination,number of satellites and simulation period on the precision is analyzed,and a new multilayer feedforward neural network weighted joint prediction model is ***,the fit of the prediction model is verified and the performance capability of the model is tested by calculating the R2 value of the model as 0.9972 and the root mean square error(RMSE)as 0.0022,which indicates that the prediction capability of the model is ***,using the novel multilayer feedforward neural network weighted joint prediction model,and considering the research results and realistic costs,it is proposed that when the constellation is set to an orbital altitude of 500 km,orbital inclination of 75and the number of satellites is 6,the altimetry precision can reach 0.0732 m within one year simulation period,which can meet the requirements of underwater navigation precision,and thus can provide a reference basis for subsequent research on spaceborne GNSS-R sea surface altimetry.

关键词： GNSS-R satellite constellations Sea surface altimetric precision Underwater navigation Multilayer feedforward neural network

Rare-earth mediated dihydrogen activation and catalytic hydrogenation

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Journal of Rare Earths 2021年第9期39卷 1017-1023页

作者： yiwen Guan Erli lu Xin Xu Key laboratory of Organic Synthesis of Jiangsu Province College of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China School of Natural and Environmental Sciences Newcastle UniversityKing's RoadNewcastle Upon TyneNE17RUUK

This review covers H-H bond cleavage of dihydrogen(H2)mediated by structurally well-defined rareearth metal(scandium,yttrium and lanthanides)complexes,and their applications in homogenous catalysis,such as catalytic hydrogenation of unsaturated organic *** on the mechanism of the H-H bond cleavage,this review is organized in two parts:(1)σ-bond metathesis,and(2)non-σ-metathesis H2 *** latter is a new trend in this research field and is the emphasis of this *** H2 into inorganic rare-earth polyhydride complexes,albeit their potential applications as hydrogen-storage materiel,is not in the scope of this review.

关键词： Rare earths Dihydrogen activation Hydrogenation Homogeneous catalysis Cooperative effect