污染大气中浑仪,简仪的带锈防护

浑仪、简仪（以下简称两仪）在高PH、大气污染和日晒雨淋环境中的腐蚀是一种动态加速腐蚀过程。采用合成的双唑胺铜缓蚀剂和有机硅改性的甲基丙烯酸树脂,并分别复配成协同缓蚀剂群和含有增效稳定剂的封护剂。采用这两种材料和脱水后再防护的工艺,使带锈防护后的浑仪、简仪的腐蚀低于无污染大气中的速率。用电化学方法评价了防护技术的可行性,根据腐蚀与人工老化试验结果讨论了防护材料性能与腐蚀环境和带锈防护的关系,采用XPS分析方法探索了双唑胺比BTA更适用于两仪防护的原因。     

山西原平北贾铺东汉墓葬所见的北方草原文化因素——附汉鲜卑遗存的发现与辨识

2005年山西省考古研究所在原平市北贾铺村清理了东汉中晚期的7座墓葬。通过随葬陶器以及棺内铺垫石灰,死者头枕灰泥枕等埋葬习俗等因素的对比分析,发现这批墓葬的主人与当时活跃在北方草原的鲜卑集团关系密切。原平地处汉魏时期的雁门郡,是当时北方游牧集团南下侵扰比较频繁的地区,也是中原王朝安置归附的北方游牧集团部众的区域之一。结合文献记载,北贾铺东汉晚期墓葬的人群很可能属于当时归附于中原王朝的鲜卑部众,而这些率先接受了汉文化影响的鲜卑集团有可能在埋葬习俗等方面对建立北魏的拓跋鲜卑产生过一定的影响。     

Multiphase flow simulation through porous media with explicitly resolved fractures

Accurate simulation of multiphase flow in fractured porous media remains a challenge. An important problem is the representation of the discontinuous or near discontinuous behaviour of saturation in real geological formations. In the classical continuum approach, a refined mesh is required at the interface between fracture and porous media to capture the steep gradients in saturation and saturation‐dependent transport properties. This dramatically increases the computational load when large numbers of fractures are present in the numerical model. A discontinuous finite element method is reported here to model flow in fractured porous media. The governing multiphase porous media flow equations are solved in the adaptive mesh computational fluid dynamics code IC‐FERST on unstructured meshes. The method is based on a mixed control volume – discontinuous finite element formulation. This is combined with the P_N+1DG‐P_NDG element pair, which has discontinuous (order N+1) representation for velocity and discontinuous (order N) representation for pressure. A number of test cases are used to evaluate the method's ability to model fracture flow. The first is used to verify the performance of the element pair on structured and unstructured meshes of different resolution. Multiphase flow is then modelled in a range of idealised and simple fracture patterns. Solutions with sharp saturation fronts and computational economy in terms of mesh size are illustrated.     

陕西子洲出土商代青铜容器铸造工艺观察分析

2010年11月,陕西省子洲县裴家湾镇关王岔村出土了6件青铜容器,包括尊、瓿、盘、觚、鼎、提梁卣各1件。本文通过对铜器上遗留的工艺痕迹进行肉眼观察,对铜器的铸型设计、芯撑情况、浇注位置等铸造工艺环节以及铸后加工的细节进行了初步的判断和复原,指出该批铜器的铸造工艺与安阳出土的殷墟前期同类器物基本相同,这一结果对认识和揭示这批青铜器的学术价值具有重要的意义。     

卢梭回归自然的美学之境

卢梭的“自然美”思想丰赡深邃,精远宏阔.从美育目标、理念、重点三个层面梳理了卢梭自然主义美育思想的核心内容,将其教育特点归纳为整体性、平民性、情感性和自然性,并着重阐述了这一思想对新时期我国美育工作的四个重要启示:即注重美育工作的辩证性;尊重美育实践的主体性;激励美育过程的情感性;倡导美育内容的生态性.     

Study on the lithology of stone chimes (stone musical instruments in ancient China) and Lingbi stone

The oldest extant musical instruments in the world are stone chimes. This music was created by the ‘eight tones’ that could be produced by these ‘stone’ voices. Although many of these stone chimes have been unearthed from sites predating the Spring and Autumn Period and the Warring States Period in China, their discussion in archaeological reports is usually not very thorough. In this paper, the ancient and modern samples are analysed from the point of view of lithology. The aim is to explore how the ancients chose to make these stones, and to check that the type of stone from which these ancient Chinese stone chimes are made is actually those recorded in previous studies. The results show that most of the ancient stone chimes in China are made of limestone. These chimes required a material with a single, homogeneous and compact mineral composition. Lingbi chimes (a kind of ‘lithophone’ produced in Lingbi county, China, are pure in composition and have a fine microcrystalline structure, which is the best choice for making stone chimes. This paper makes a systematic study of the lithology of Chinese stone chimes. The results supplement a significant lacuna in the study of ‘lithophone’ and ancient stone instruments both in China and on a more global scale.     

契丹陶器的编年

辽代瓷器的研究已取得丰硕的成果,但对于契丹传统陶器的研究却没有得到应有的重视.通过对契丹最具特色的传统陶器的排序与编年的研究,不仅了解了契丹陶器发展演变的脉络,同时辨识出远在建立辽王朝之前的契丹遗存,并确认了其同鲜卑遗存的一定联系.契丹陶器的演化表明在建立辽代发展的过程中,随着经济实力的增强和技术工艺的发展,传统陶器逐渐被釉陶或瓷器所替代,走向了衰落.     

贵在总结经验不宜急于更名——读《略论我国社会主义时期第一轮修志的时间》有感

20世纪五六十年代的新方志编纂应认真总结经验、教训.就当时修志的背景、规模、进程,尤其是从成书的数量和质量看,不宜称为"第一轮修志",可以称之为一个序幕或者一次兴起.     

新中国土地改革后新富农产生的规模与分布研究

从土地改革结束到农业集体化高潮前夕,新富农的出现从全国范围来看是稀少而缓慢的。在各省之间,农民的富裕程度与新富农比重大小关系不明显,但在同一地区内来看,两者呈现正相关关系。同时,在农业合作化程度较高亦即是较早对新富农采取限制政策的地区,新富农的比重并不一定低于甚至高于其他地区。这说明多种因素对新富农的产生、发展发生作用,单因素的分析不能解释清楚新富农这个复杂的社会经济问题。     

国民经济恢复时期北京的失业知识分子救济政策及其成效

国民经济恢复时期,面对失业和人才需求关系的矛盾,城市失业知识分子受到党和政府的高度关注。北京市的失业知识分子虽人数不多,但呈现出一定程度的复杂性。为此,北京市根据党和国家的政策,从首都社会秩序的稳定和首都建设的人才需求出发,在较短的时间内,有计划有步骤地对失业知识分子进行了必要的社会救济,达到了预期的目标。同时,实际操作中也遇到了一些不容回避的问题。