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超临界地质流体的形成与演化

中国科学:地球科学 2025年第1期55卷 38-51页

作者：倪怀玮肖益林熊小林刘显东高春晓陈伊翔李云国李万财郭璇王洋洋谭东波张力中国科学技术大学岩石圈演化与环境演变全国重点实验室合肥230026 中国科学技术大学深空探测实验室/地球和空间科学学院合肥230026 中国科学院广州地球化学研究所广州510640 南京大学地球科学与工程学院南京210023 吉林大学超硬材料国家重点实验室长春130012

本文全面阐述了超临界地质流体的形成、演化、性质和效应.在地球内部,特殊组分的加入或温度压力的升高使H2O和硅酸盐的混溶性增强,形成同时含有大量H2O和硅酸盐溶质的超临界地质流体.在以伟晶岩体系为代表的岩浆-热液体系中,超临界地质... 详细信息

本文全面阐述了超临界地质流体的形成、演化、性质和效应.在地球内部,特殊组分的加入或温度压力的升高使H2O和硅酸盐的混溶性增强,形成同时含有大量H2O和硅酸盐溶质的超临界地质流体.在以伟晶岩体系为代表的岩浆-热液体系中,超临界地质流体的形成受控于熔体-流体临界曲线.在以俯冲板片为代表的变质岩体系中,超临界地质流体的形成受控于第二临界端点.实验结果表明,伟晶岩体系中硼和氟的存在使得地壳深度可能形成超临界地质流体,而俯冲板片则要迟至近100km深度才会释放超临界地质流体.富含H2O和解聚结构单元(单体、二聚体等)赋予了超临界地质流体独特的物理性质,包括低密度、低弹性模量、低黏度、高扩散系数和高电导率.超临界地质流体可以有效迁移包括高场强元素和重稀土元素在内的多种元素.超临界地质流体的化学特征能被交代地幔和幔源熔体继承,这可以解释弧岩浆氧化性.超临界地质流体可通过旋节分解发生相分离形成熔体网络.俯冲带岩石和伟晶岩中发现的多相流体包裹体可能是超临界地质流体的残留物.超临界地质流体可以造成俯冲板片顶部附近的低速高导异常,并且可能与中源地震存在联系.超临界地质流体可能在伟晶岩及其矿床的形成过程中起到了关键作用.

关键词：超临界地质流体混溶俯冲带伟晶岩

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卡罗琳板块在穆绍海沟的拓展型俯冲起始

中国科学:地球科学 2025年第1期55卷 255-271页

作者：李春峰邓永康吴涛董冬冬张国良张佳政刘宇涛李亚清唐富贵章露露浙江大学海洋科学系舟山316021 崂山实验室海洋矿产资源实验室青岛266237 中国科学院海洋研究所中国科学院海洋地质与环境重点实验室青岛266071 中国科学院南海海洋研究所中国科学院边缘海与大洋地质重点实验室广州510301 中国科学院软件研究所综合信息系统科技重点实验室北京100190

穆绍海沟获得的新地震成像证实,海洋板块边界的水平压缩作用在年轻且较弱的海洋板块内部可诱发形成海沟,并且年轻板块诞生后不久就开始向古老板块之下俯冲.虽然板块边界两侧存在显著的年龄差异和先存薄弱带,但在水平挤压和垂直重力牵引... 详细信息

穆绍海沟获得的新地震成像证实,海洋板块边界的水平压缩作用在年轻且较弱的海洋板块内部可诱发形成海沟,并且年轻板块诞生后不久就开始向古老板块之下俯冲.虽然板块边界两侧存在显著的年龄差异和先存薄弱带,但在水平挤压和垂直重力牵引的共同作用下,中生代太平洋板块依然难以挠曲.在经过长时间的海沟迁移之后,或经历初始挤压过渡到海沟俯冲发育的漫长过程之后,穆绍海沟北端的卡罗琳海板块才逐渐开始挠曲.两条平行地震剖面中,显著不同的海沟变形和沉积增生现象表明了穆绍海沟的俯冲迁移或显著的沿海沟的纵向不连续性,这可以用卡罗琳板块的逆时针旋转来解释从俯冲到非俯冲的快速转变.在俯冲启动前,微小的增生楔可能就已经形成,这表明穆绍海沟已经经历了强烈的压缩和隆起.目前穆绍海沟的地震活动相对平静,并且其东侧的莱拉海槽显示出伸展松弛,表明目前卡罗琳板块的旋转已经停止.

关键词：穆绍海沟俯冲起始地震反射卡罗琳板块

Solid Desiccant Dehumidification Techniques Inspired from Natural Electroosmosis Phenomena

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Journal of Bionic Engineering 2011年第1期8卷 90-97页

作者： B. li y. y. yan Faculty of Engineering University of Nottingham Lenton Firs Building University Park Nottingham NG7 2RD UK

Electroosmosis has been shown to be an effective means of different applications in various fields such as Micro-Electro-Mechanical systems （MEMS） and biomimetics applications. This paper aims to prove the concept that the electroosmosis phenomena can also be cooperated into larger scale applications in the building service industry like dehumidification or damping proof. The electroosmotic flow inside a porous medium is validated experimentally to further understand the dehumidification mechanism of combined techniques. An experimental test validates that the condensation from the porous medium can be obtained by electroosmotic force generated by external electric field, especially for specific desiccant powders like zeolite and diatomaceous earth. With a range of volts from 5 V to 20 V applying between the testing plates, the maximum flow rate through the cross section in the testing plate achieved during the peak period is 1.35 laL＇min 1. These promising phenomena can act as an alternative way for energy choice in dehumidification industrial field. Further researches on new regeneration methods for solid desiccant dehumidification are required to make the system simple, energy-saving and suitable for small air conditioning units.

关键词： biomimetics electroosmotic flow solid desiccant dehumidification

MICROSTRVCTURE SIMULATION AND PROCESS OPTIMIZATION OF TURBINE BLADE CASTINGS

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Acta Metallurgica Sinica(English Letters) 1998年第5期11卷 383-390页

作者： D.Z.li Z.y.Hu Q.li y.y.li Inst of Metal Research The Chinese Acad of Sciences Shenyang China

The probabilistic modeling is applied to calculate microstructural features of the thin complex smprolloy turbine blades cast by the vacuum investment process. The random distribution, orientation and physical mechanism of the nucleation, the growth kinetics of dendrites and the columnar-to-equiaxed transition (CET) are *** on these simulating schemes, the comprehensive influence of key process variables on the scale and uniformity of grains has been involved quantitatively. The validity of the modeling is confirmed by selection of the optimum process variables.

关键词： Probabilistic modeling microstructure process optimization

One-step polymerized lanthanide-based polystyrene microsphere for sensitive lateral flow immunoassay

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Journal of Rare Earths 2021年第1期39卷 11-18,I0001页

作者： Zhenhua li Qingyun liu yongfang li Wei yuan Fuyou y.li State Key Laboratory of Molecular Engineering of Polymers Department of ChemistryFudan UniversityShanghai200433China

Lateral flow immunoassays(LFIAs)provide a powerful tool for rapid real-time assay of cancer biomarkers,which is vital for cancer detection and treatment ***-based LFIAs is one of the most widely used methods,especially Eu(Ⅲ)chelates,which possess distinctive and attractive characteristics,such as time-resolved fluorescence and large Stokes ***,we adopted a new onestep mini-emulsion polymerization method to synthesize carboxyl-modified fluorescent microsphere(OS-EuCM),which shows good stability,resistance to non-specific adhesion and uniform particle size distribution compared with traditional microspheres synthesized through the swelling *** from the above advantages,OS-EuCM was successfully used in LFIAs to detect tumor marker Alpha-fetoprotein with high sensitivity and selectivity in concentration as high as 320 ng/mL,as well as a detection limit of 0.683 ng/mL This lanthanide-based microsphere holds great potential for rapid pointof-care screening and clinical application.

关键词： Eu(Ⅲ)chelate Polystyrene microsphere Mini-emulsion polymerization Lateral flow immunoassays Alpha-fetoprotein Rare earths

Mathematical modelling of axonal microtubule bundles under dynamic torsion

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Applied Mathematics and Mechanics(English Edition) 2018年第6期39卷 829-844页

作者： J.y.WU Hong yUAN L.y.li MOE Key Laboratory of Disaster Forecast and Control in Engineering Institute of Applied MechanicsJinan University School of Engineering University of Plymouth

Owing to its viscoelastic nature, axon exhibits a stress rate-dependent me- chanical behavior. An extended tension-shear chain model with Kelvin-Voigt viscoelas- ticity is developed to illustrate the micromechanical behavior of the axon under dynamic torsional conditions. Theoretical closed-form expressions are derived to predict the de- formation, stress transfer, and failure mechanism between microtubule （MT） and tau protein while the axon is sheared dynamically. The results obtained from the present an- alytical solutions demonstrate how the MT-tau interface length, spacing between the tau proteins, and loading rate affect the mechanical properties of axon. Moreover, it is found that the MTs are more prone to rupture due to the contributions from the viscoelastic effects. Under the torsional force, the MTs are so long that the stress concentrates at the loaded end where axonal MTs will break. This MT-tau protein dynamics model can help to understand the underlying pathology and molecular mechanisms of axonal injury. Additionally, the emphasis of this paper is on the micromechanical behavior of axon, whereas this theoretical model can be equally applicable to other soft or hard tissues, owning the similar fibrous structure.

关键词： torsion biocomposite diffuse axonal injury (DAI) Kelvin-Voigt viscoelas-tic model dynamic response tension-shear chain model

EFFECT OF CHEMICAL COMPOSITION AND PROCESSES ON THE TEXTURE OF HOT-ROLLED DEEP DRAWING STEEL SHEET

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Acta Metallurgica Sinica(English Letters) 2002年第3期15卷 324-330页

作者： y.Chen X.Chen C.y.li X.y.li y.L.Kang Technical Center of Wuhan Iron and Steel Group Co. Wuhan 430080China Wuhan University of Science and Technology Wuhan 430080China Central General Iron and Steel Research Institute Beijing 100081China University of Science and Technology Beijing Beijing 100083China

A hot-rolled deep drawing(HDD)steel with high r-value and uniformdistribution of{111}texture in thickness was developed by hot rolling in ferrite region withlubricating between the roller and the *** experimental results show that the carbon contentand finish rolling temperature have significant effects on beneficial texture{111},and lubricatingduring hot rolling at low temperature in alpha-region makes the distribution of the *** basic requirements needed to meet for HDD steel were concluded by comparing differentcarbon contents and hot rolling processes.

关键词： ultra low carbon hot rolling in alpha-region lubricating r-value {111}texture

PREDICTION OF CARBON CONCENTRATION AND FERRITE VOLUME FRACTION OF HOT-ROLLED STEEL STRIP DURING LAMINAR COOliNG

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Acta Metallurgica Sinica(English Letters) 2007年第4期20卷 251-257页

作者： y.T. Zhang C.Z. Wang D.Z. li y.y. li School of Material Science and Engineering Shenyang Ligong University Shenyang 110168 China Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

A phase transformation model was presented for predicting the phase fraction transformed and the carbon concentration in austenite for austenite to ferrite transformation during laminar cooling on run-out table in hot rolling strip mill. In this model, the parameter k in Avrami equation was developed for carbon steels. The wide range of chemical composition, the primary austenite grain size, and the retained strain were taken into account. It can be used to predict the ferrite volume fraction and the carbon concentration in austenite of hot-rolled steel strip during laminar cooling on run-out table. The coiling temperature controlling model was also presented to calculate the temperature of steel strip. The transformation kinetics of austenite to ferrite and the evolution of carbon concentration in austenite at different temperatures during cooling were investigated in the hot rolled Q235B strip for thickness of 9.35, 6.4, and 3.2mm. The ferrite volume fraction along the length of the strip was also calculated. The calculated ferrite volume fraction was compared with the log data from hot strip mill and the calculated results were in agreement with the experimental ones. The present study is a part of the prediction of the mechanical properties of hot-rolled steel strip, and it has already been used on-line and off-line in the hot strip mill.

关键词： carbon concentration ferrite volume fraction laminar cooling hot rolling

A Safe and Brief Way for Preparing Anhydrous LnCl_3 (Ln=Sc, y, La to Lu)

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Rare Metals 2000年第2期19卷 157-161,152页

作者： li, y Wang, LS Wang, yH Department of Chemistry Northeastern University Shenyang 110006 China

Anhydrous lanthanide chlorides LnCl 3 (Ln=Sc, y, La to Lu except for Pm), which are difficult to prepare in other ways, were prepared by chemical vapor transport (CVT) process. Rare earth oxide reacted with Al 2Cl 6 at 300℃ to produce LnCl 3, which was then separated from other solids by means of CVT at a temperature gradient from 400 to 180℃. Residual Al 2Cl 6 (g) was removed by carrier of dry N 2 gas at 200℃. The yielding rates were >90%, and the purity of products was >99.5%.

关键词： Anhydrous lanthanide chlorides AlCl 3 Chemical vapor transport