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ZrC-ZrB_2-SiC ceramic nanocomposites derived from a novel single-source precursor with high ceramic yield

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Journal of Advanced Ceramics 2019年第1期8卷 112-120页

作者： Zhaoju YU xuan lv Shuyi LAI Le YANG Wenjing LEI Xingang LUAN Ralf RIEDEL College of Materials Key Laboratory of High Performance Ceramic Fibers (Xiamen University) Ministry of Education College of Materials Fujian Key Laboratory of Advanced Materials (Xiamen University) College of Materials Science and Engineering Huaqiao University Science and Technology on Thermostructural Composite Materials Laboratory Northwestern Polytechnical University Technische Universit?t Darmstadt Institut für Materialwissenschaft

For the first time, ZrC-ZrB_2-SiC ceramic nanocomposites were successfully prepared by a single-source-precursor route, with allylhydridopolycarbosilane(AHPCS),triethylamine borane(TEAB),and bis(cyclopentadienyl) zirconium dichloride(Cp_2 ZrCl_2) as starting materials. The polymer-to-ceramic transformation and thermal behavior of obtained single-source precursor were characterized by means of Fourier transform infrared spectroscopy(FT-IR) and thermal gravimetric analysis(TGA). The results show that the precursor possesses a high ceramic yield about 85% at 1000 ℃.The phase composition and microstructure of formed ZrC-ZrB_2-SiC ceramics were investigated by means of X-ray diffraction(XRD) and high resolution transmission electron microscopy(HRTEM).Meanwhile, the weight loss and chemical composition of the resultant ZrC-ZrB_2-SiC nanocomposites were investigated after annealing at high temperature up to 1800 ℃. High temperature behavior with respect to decomposition as well as crystallization shows a promising high temperature stability of the formed ZrC-ZrB_2-SiC nanocomposites.

关键词： polymer derived ceramics single-source precursor ceramic nanocomposite

Experimental Study of Mooring Type Effect on the Hydrodynamic Characteristics of VLFS

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China Ocean Engineering 2022年第1期36卷 155-166页

作者： FENG Ming-wei SUN Zhao-chen LIANG Shu-xiu LI Zhi lv xuan JIA Song-lin HUXin-yue State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian 116024China

Mooring system is a significant part of very large offshore floating structures(VLFS).In this paper,a single module pontoon type VLFS model considering four mooring types is studied through physical model tests to determine the effects of mooring conditions on the hydroelastic response,mooring force,incident coefficient,reflection coefficient and energy dissipation *** mooring cables are symmetrically arranged on both sides of the *** floating body model satisfies the similarity of stiffness and gravity,while the cable satisfies the similarity of elasticity and *** results show that the effect of mooring type on mooring force is greater than that on hydroelastic *** the initial tension of the mooring cable will reduce the amplitude of the leeward of the VLFS *** mooring angle of the mooring cable will affect the maximum mooring force and the initial tension of the mooring line will affect the wave period in which the maximum mooring force *** transmission coefficient and wave energy dissipation coefficient will change regularly with different mooring *** results may provide a reference to facilitate the mooring design of VLFS.

关键词： VLFS hydroelastic response mooring system 3D experimental test mooring force wave reflection coefficient wave transmission coefficient wave dissipation coefficient

A parathyroid hormone related supramolecular peptide for multi-functionalized osteoregeneration

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Bioactive Materials 2024年第4期34卷 181-203页

作者： Zhuowen Hao Qinyu Feng Yi Wang Ying Wang Hanke Li Yingkun Hu Tianhong Chen Junwu Wang Renxin Chen xuan lv Zhiqiang Yang Jiayao Chen Xiaodong Guo Jingfeng Li Department of Orthopedics Zhongnan Hospital of Wuhan UniversityWuhan430071China Department of Obstetrics and Gynecology Renmin Hospital of Wuhan UniversityWuhan430060China Department of Orthopedics Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430022China

Supramolecular peptide nanofiber hydrogels are emerging biomaterials for tissue engineering,but it is difficult to fabricate multi-functional systems by simply mixing several short-motif-modified supramolecular peptides because relatively abundant motifs generally hinder nanofiber cross-linking or the formation of long *** bioactive factors to the assembling backbone is an ideal strategy to design multi-functional supramolecular peptides in spite of challenging synthesis and ***,a multi-functional supramolecular peptide,P1R16,is developed by coupling a bioactive factor,parathyroid hormone related peptide 1(PTHrP-1),to the basic supramolecular peptide RADA16-I via solid-phase *** is found that P1R16 self-assembles into long nanofibers and co-assembles with RADA16-I to form nanofiber hydrogels,thus coupling PTHrP-1 to hydrogel matrix.P1R16 nanofiber retains osteoinductive activity in a dose-dependent manner,and P1R16/RADA16-I nanofiber hydrogels promote osteogenesis,angiogenesis and osteoclastogenesis in vitro and induce multi-functionalized osteoregeneration by intramembranous ossification and bone remodeling in vivo when loaded to collagen(Col)*** red blood marrow formation,ideal osteointegration and adapted degradation are observed in the 50%P1R16/Col scaffold ***,this study provides a promising strategy to develop multi-functional supramolecular peptides and a new method to topically administrate parathyroid hormone or parathyroid hormone related peptides for non-healing bone defects.

关键词： Supramolecular peptide nanofiber hydrogels Parathyroid hormone Self-assembly Co-assembly Bone tissue engineering

Current advances in circulating inflammatory biomarkers in atherosclerosis and related cardio-cerebrovascular diseases

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Chronic Diseases and Translational Medicine 2017年第4期3卷 207-212页

作者： Jun-xuan lv Qi Kong Xin Ma Department of Neurology Xuanwu Hospital of Capital Medical University National Clinical Research Center for Geriatric Disorders Clinical Center for Cardio-cerebrovascular Disease Capital Medical University Beijing 100053 China

Atherosclerosis (AS) is a systemic chronic disease affecting both the coronary and cerebral arteries. Inflammation plays a key role in the initiation and progression of AS, and numerous inflammatory factors have been proposed as potential biomarkers. This article reviews recent research in studies on major circulating inflammatory biomarkers to identify surrogates that may reflect processes associated with AS development and the risk of AS-related vascular events, such as Von Willebrand factor, lectin-like oxidized low-density-lipoprotein receptor-1, soluble urokinase plasminogen activator receptor, regulated upon activation, normal T-cell expressed and secreted, and microparticles, which may provide new perspectives for clinical AS evaluation and risk stratification.

关键词： Atherosclerosis Plaques Inflammatory biomarkers Risk factors

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传统民间改制型儿童斗篷的复原与设计研究

丝绸 2024年第3期61卷 11-19页

作者：吕轩崔荣荣四川师范大学服装与设计艺术学院成都610066 浙江理工大学服装学院杭州310018

传统民间改制型儿童斗篷是利用成人旧衣物改制而成的童装之一。文章以江南大学民间服饰传习馆馆藏和笔者田野考察拍摄的改制型儿童斗篷为研究对象,以探究其改制背景、工艺痕迹、服装结构来推演旧衣物来源,并通过复原马面裙、女褂改制成... 详细信息

传统民间改制型儿童斗篷是利用成人旧衣物改制而成的童装之一。文章以江南大学民间服饰传习馆馆藏和笔者田野考察拍摄的改制型儿童斗篷为研究对象,以探究其改制背景、工艺痕迹、服装结构来推演旧衣物来源,并通过复原马面裙、女褂改制成儿童斗篷的过程为案例进行实证。研究表明:民间制作者通常首选布料面积大、绣花精致具有装饰性的传统民间服饰作为改制材料,其次是其他家纺产品;其设计特征表现为色彩选择以祈福为目的,图案重组以满足显露需求为重点,细节装饰以搭配主体为基准,改制遵循“以大化小”“翻旧为新”“美化传承”的原则。所蕴含的设计思想和文化内涵,充分体现了中华民族的艰苦朴素品质、祈福观念、民间造物智慧。

关键词：传统民间服饰儿童斗篷旧衣改制复原设计特征民间造物智慧

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论台湾土地开发许可制及其对大陆地区的启示

湖南师范大学社会科学学报 2013年第3期42卷 47-54页

作者：金俭吕翾南京大学法学院

台湾土地开发许可制由"容积移转"运作机制与"增量利益公共回馈"分配机制构成。台湾地政机构分别在地狭人稠的都会区与环生系统脆弱的农业区以及两区域间主导实施土地开发许可制,旨在达到发展经济与保育农地的双重目的,实践中取得良好效... 详细信息

台湾土地开发许可制由"容积移转"运作机制与"增量利益公共回馈"分配机制构成。台湾地政机构分别在地狭人稠的都会区与环生系统脆弱的农业区以及两区域间主导实施土地开发许可制,旨在达到发展经济与保育农地的双重目的,实践中取得良好效果。在性质上,开发许可制介于土地用途分区管制制度与土地发展权制度之间,是一种准市场化运作的土地开发与管理制度。大陆地区在构建土地发展权制度与配置土地发展权过程中,可借鉴台湾土地开发许可制,在将土地发展权国有化基础上,完善其在政府、土地原权利人与社会公众之间的合理分配比例。

关键词：开发许可制容积移转增量利益公共回馈

Determination of Hg in soil by ultrasonic slurry sampling hydride generation atomic fluorescence spectrometry

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Journal of Environmental Science and Engineering 2008年第5期2卷 9-13页

作者： LIANG Shu-xuan lv Tian-feng ZHOU Wei-jing SUN Han-wen Key Laboratory of Analytical Science and Technology of Hebei Province College of Chemistry and Environmental Science Hebei University Baoding 071002 China

Ultrasonic aided slurry sampling hydride generation atomic fluorescence spectrometry （USS-HG-AFS） was developed for the determination of Hg in soil samples from a sewage-irrigated farm. 500 mg grounded soil was suspended in agar solution by an ultrasound water bath before the HG-AFS determination. The results for the reference material of soil （serial number GBW-07411） agreed satisfactorily with the certified values. Results obtained by the developed procedure compared well with those after traditional acid digestion of samples. The detection limit are 6.7ngL-1 for Hg respectively, with average relative standard deviation values of 6.4% for analysis of a series of soil samples of different origin. The recoveries of the anatytes varied in the range from 95 to 107%. This observation has stimulated interest in fast, accurate and sensitive analytical methods for determination of metals in soil.

关键词： hydride generation ultrasonic slurry sampling atomic fluorescence spectrometry soil trace element

The Research of East Asian Monetary Cooperation Based on Symmetry of Economic Shocks

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The Research of East Asian Monetary Cooperation Based on Sym...

第三届（2011）金融风险与公司金融国际研讨会

作者： AN Hui ZHAO Qing lv xuan School of Economics Dalian University of Technology Dalian China 116023

＜正＞Regional monetary cooperation has been the focus of the international financial sector issues for a long *** the study on East Asian monetary cooperation has great practical significance to prevent financial crises and to promote regional economic *** paper establishes VAR model to examine the East Asian economies’ symmetry of the supply shock and demand *** empirical results show that,the symmetry of economic shocks between the East Asian small nations remains high,and in recent years the most notable change is that the symmetry between the East Asian large members represented by China and Japan increases *** this point of view,this paper argues that further monetary cooperation in East Asia should shift from"crisis driven"cooperation to"power driven"cooperation.

关键词： Optimal Currency Areas East Asian monetary cooperation symmetry of economic shocks

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土地流转中增量利益关系之经济法调整论

湘潭大学学报（哲学社会科学版） 2012年第6期36卷 30-34页

作者：吕翾金俭南京大学法学院江苏南京210093

土地流转引起的土地增量利益关系包括土地开发主体与国家、社会公众、被征地农民与城市被拆迁人之间的增量利益分配关系。本质为各主体对剩余权及其价值的争夺。剩余权分配法律关系需要经济法来主导调整。应遵循利益最大化之经济正当原... 详细信息

土地流转引起的土地增量利益关系包括土地开发主体与国家、社会公众、被征地农民与城市被拆迁人之间的增量利益分配关系。本质为各主体对剩余权及其价值的争夺。剩余权分配法律关系需要经济法来主导调整。应遵循利益最大化之经济正当原则与利益共享之法律正当原则;构建增量利益最大化之产权保障机制、增量利益社会共享之税收分配机制与发展权让渡之征收补偿机制。土地增量利益关系之经济法调整手段具有科学发展、构建和谐社会之社会价值、防范腐败与经济泡沫之政治经济价值及维护发展的公平、普遍与可持续之法律价值。

关键词：土地流转土地增量利益关系经济法