遗产的解释

在当今中国社会,"遗产运动"正如火如荼地铺开,上至中央政府,下至地方民众,都在忙于"遗产"的申报、评估、学习和保护工作。而在学术界,"遗产"虽已成为历史学、旅游学、地理学、人类学等学科领域的重要学术话题,然而真正有所建树的遗产理论却少之又少。因此,从人类学角度探讨"遗产"的本质及其与文化空间、族群认同、文化自觉等概念的相关性并结合国内遗产运动的现状进行辨析,就有其现实的必要性

人类学民族学硕士研究生培养经验五人谈

从20世纪90年代中期开始,中国的硕士研究生教育已从精英教育转换为普及教育、素质教育。适应这种变化,人类学民族学硕士研究的工作应该强化。在增加数量的同时,不降低质量。中山大学人类学系、厦门大学人类学系、广西民族学院等单位的做法值得借鉴

原生态文化与中国传统

第九届人类学高级论坛于2010年6月23～25日在贵州省凯里学院举行。会议期间,《光明日报》国学版主编梁枢先生组织了一个关于"原生态文化与中国传统"的小型座谈会,会议由广西民族大学徐杰舜教授主持,参加人员有中国人民大学郑杭生教授、中国社会科学院叶舒宪研究员、四川大学徐新建教授、厦门大学彭兆荣教授、中国人民大学陆益龙副教授、浙江师范大学林敏霞博士等。座谈会就原生态文化与中国传统文化尤其是国学的关系展开了深入探讨

Versatile fabrication of aligned SnO2 nanotube arrays by using various ZnO arrays as sacrificial templates

通讯作者地址: Xie, ZX (通讯作者), Xiamen Univ, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China 地址: 1. Xiamen Univ, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China 2. Xiamen Univ, Dept Chem, Coll Chem & Chem Engn, Xiamen 361005, Peoples R China 电子邮件地址: [email protected] this paper, we describe an effective two-step method for fabricating aligned SnO2 nanotube arrays by using various pre-synthesized ZnO nanorod arrays as sacrificial templates. The composition and structure of as-synthesized SnO2 nanotube arrays were analyzed in detail by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. Because there is a special epitaxial relation between the SnO2 walls and ZnO templates, the walls building the SnO2 nanotubes are highly orientated and nearly single-crystalline. Our present study provides an opportunity to investigate related physical and chemical properties and potential applications of such aligned SnO2 nanotubes with nearly single-crystalline nature.National Natural Science Foundation of China 20725310,20721001 ,20673085,20801045 National Basic Research Program of China 2007CB815303 2009CB939804 Key Scientific Project of Fujian Province of China 2005HZ01-

Tailoring the optical property by a three-dimensional epitaxial heterostructure: A case of ZnO/SnO2

Epitaxial growth, as a best strategy to attain a heterostructure with a well-defined and clean interface, usually takes place on a planar substrate. In this paper, using a ZnO/SnO2 core-shell heterostructure as an example, we demonstrate the possibility of establishing a three-dimensional epitaxial interface between two materials with different crystal systems for the first time and show possible tailoring optical properties by building the heteroepitaxial crystal interface. The characterization results of element mapping, high-resolution transmission electron microscopy, and selected area electric diffraction reveal that the as-prepared ZnO/SnO2 heterostructure has a tetrapod-like ZnO core and a SnO2 shell with 15-30 nm, and their special epitaxial relation is (010)(SnO2)||(0110)(ZnO) and [100](SnO2)||[0001](ZnO). Such three-dimensional epitaxy between the ZnO core and SnO2 shell is quite different from the usual planar epitaxy or three-dimensional epitaxy between materials having the same crystal structure. A rational model of such complicated epitaxy has been proposed through investigating the certain structural comparability between the wurtzite ZnO and rutile SnO2 crystals. The as-prepared T-ZnO/SnO2 epitaxial heterostructure exhibits unique luminescence properties in contrast with individual tetrapod ZnO and SnO2 nanostructures, in which the epitaxial interface induces new luminescence properties. This result may inspire great interest in exploring other complicated epitaxy systems and their potential applications in laser, gas sensor, solar energy conversion, photo catalysis, and nanodevices in the future

Preparation and optical properties of ThO2 and Eu-doped ThO2 nanotubes by the sol-gel method combined with porous anodic aluminum oxide template

通讯作者地址: Xie, ZX (通讯作者), Xiamen Univ, Coll Chem & Chem Engn, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China 地址: 1. Xiamen Univ, Coll Chem & Chem Engn, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China 2. Xiamen Univ, Coll Chem & Chem Engn, Dept Chem, Xiamen 361005, Peoples R China 电子邮件地址: [email protected] this paper, we report the synthesis of thorium oxide and Eu-doped thorium oxide nanotubes for the first time using the sol-gel method in porous anodic aluminum oxide template. Transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy were applied to characterize the morphology and structure of the as-prepared nanotubes. It has been demonstrated that Eu3+ ions were homogeneously doped into the ThO2 crystal lattice. The optical properties resulting from Eu-doped products were investigated by means of photoluminescence spectroscopy. Strong visible light emissions were observed at low doping concentration, and the luminescent intensity decreased at high doping concentration. The luminescent centers were concluded to be the Eu3+ ions in the cubic (O-h) sites rather than the C-3 upsilon sites, which accounted well for the decrease of luminescent intensity at high doping concentration

气相二氧化硅负载离子液体抗静电改性超高分子量聚乙烯的制备及性能

采用拉伸流变挤出成型设备，将抗静电剂咪唑类离子液体（IL）负载于纳米气相二氧化硅（SiO2）上，对超高分子量聚乙烯（UHMWPE）进行抗静电改性，研究了IL及纳米气相SiO2含量对UHMWPE加工性能、表面电性能、结晶性能和力学性能的影响。结果表明，IL是UHMWPE的良好增塑剂，随着IL的加入，UHMWPE的挤出扭矩明显降低，UHMWPE材料的挤出成型效率提高。值得关注的是，IL的加入可明显降低UHMWPE表面的摩擦电压。当IL质量分数为3%时，其表面摩擦电压从2.72 kV降至0.04 kV。而且，将IL负载于纳米气相SiO2上可以解决IL在UHMWPE中析出及分散问题。另外，纳米气相SiO2还可以提高UHMWPE/IL共混物的关键力学性能。所制备的IL改性UHMWPE具备优异的抗静电功能、较好的挤出成型效率和力学性能，有望在新一代电子信息产品及精密器件制造等领域得到广泛应用。Imidazolium ionic liquid (IL) and IL/nano silica particles were employed to produce antistatic ultrahigh molecular weight polyethylene (UHMWPE) composites. The UHMWPE/IL/SiO2 composites were processed by a self-developed elongational rheology extruder (ERE). The influence of IL/SiO2 content on the processing, electrical, crystallization and mechanical properties of UHMWPE was studied. The results show that IL is a good plasticizer for UHMWPE, and can increase the extrusion efficiency of UHMWPE obviously by reducing the extrusion torque of UHMWPE in the ERE. The addition of IL can significantly reduce the surface friction voltage of UHMWPE from 2.72 kV to 0.04 kV when the IL mass fraction is 3%. It is noteworthy that, loading IL on nano silica particles can avoid the IL blooming on the surface of UHMWPE and promote the uniform dispersion of IL in the UHMWPE matrix. Nano silica particles have a good toughening and strengthening effect on UHMWPE to improve the tensile strength and impact strength of UHMWPE/IL/SiO2 composites. Compared to the pure UHMWPE, the antistatic UHMWPE in this study has great application prospects in the fields of electronic information and precision device manufacturing. © 2022, Editorial Board of Polymer Materials Science & Engineering. All right reserved