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。     

江苏丹阳北宋邵亢夫妻合葬墓发掘报告

2007年4月,镇江博物馆考古人员在江苏省丹阳市大泊社区王家村发掘一座宋代竖穴土坑墓。墓葬已遭破坏,出土器物较少。出土"(宋故)赠吏部尚书邵公夫人墓志铭"一合,墓主为北宋丹杨郡夫人强氏,夫君为历仕仁宗、英宗、神宗三朝,官至枢密副使的邵亢。王珪《华阳集》卷三十七撰有邵亢墓志《邵安简公亢墓志铭》。强氏墓志铭可与邵亢墓志铭相互补充、相互印证。     

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.     

Chemical and Microscopic Study of Masonry Mortar in Ancient Pagodas in East China

Ancient mortars played a crucial role in the construction of historical architectures due to their physical and chemical compatibility with traditional building materials such as stones and bricks. Therefore, the analysis and optimization of the ancient mortar formula are significant in the restoration and preservation of historical sites. In this work, 20 mortar samples selected from five ancient stone pagodas in Zhejiang Province, China, were analyzed. The results showed that mud, lime-soil mortar, lime-sand mortar, and lime-gypsum mortar were used as binders in these pagodas. The Ca(OH)₂/aggregate ratio ranging from 0.3 to 2.7 was usually used to prepare lime mortar. Protein and polysaccharide were also found in some samples.     

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.     

朝阳发现的北燕墓

近年来,为配合城市、厂矿企业的基本建设,经文物部门勘探,在朝阳市区内发现并发掘清理了大量的古代墓葬,其中包括三燕时期的墓葬.     

唐宋西南、岭南瘴病地理与知识阶层的认识应对

唐宋时期瘴气、瘴病主要分布于西南山区,瘴病主要分布于四川南部泸、黎、戎州一线、长江三峡地区、云贵高原及岭南广西盆地,瘿病主要分布于秦巴山区、川西北山区及长江三峡一带。本文通过对大量历史文献的考察认为,唐宋时期知识阶层经历了对以瘴病为主的地方性疾病由盲目恐惧悲观到不懈地探索及医学应对转变过程,其中对瘴气的地理学认识、瘴病的预防及辩证治疗最有成就,从一个侧面加深了对西南、岭南地区地理复杂性的了解。更为重要的是在对付瘴病方面士人积极进行移风易俗运动,从根本上倡导文明进步的应对观念行为,不仅对西南、岭南疾病地理有了较为科学的认识,而且在应对以瘴为主的环境疾病,推动西南、岭南地区社会文明进步方面产生了深远影响。     

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。     

建国初期党的"劳资两利"政策评析

基于对新中国建国方针的认识、对社会主要矛盾的判断和利用私营经济发展生产力的考虑,建国初期党和政府把“劳资两利”确定为处理私营企业劳资关系的基本政策。它包括保障私营企业工人的权益、保障资本家的正当权益、努力构建和谐的劳资关系三方面内容。这一政策体现了以毛泽东为核心的第一代中央领导集体勇于探索、开拓创新的伟大精神,极大地丰富和发展了马克思主义劳资关系理论,为构建当代中国非公有制企业和谐的劳资关系提供了有益的借鉴。     

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。