故宫太和殿结构现状数值模拟研究

为保护故宫太和殿,采用数值模拟方法,研究了太和殿的结构现状特征。采用ANSYS有限元程序,考虑榫卯节点、斗拱连接等构造,建立了太和殿有限元模型。分别对模型进行自重作用、风荷载作用下的静力分析及8度常遇地震作用下的时程响应分析,获得了太和殿在不同荷载作用下的内力及变形分布特征,评价了太和殿的结构安全现状。结果表明:重力及风荷载作用下,太和殿结构的内力、变形均在容许范围内;地震作用下,结构保持稳定状态,且榫卯节点及斗拱构造有利于减震。因此,太和殿结构现状是安全的。     

Revised stratigraphy of the Xiazhen Formation (Upper Ordovician) at Zhuzhai,South China,based on palaeontological and lithological data

Lee, D.-C., Park, J., Woo, J., Kwon, Y.K., Lee, J.-G., Guan, L., Sun, N., Lee, S.-B., Liang, K., Liu, L., Rhee, C.-W., Choh, S.-J., Kim, B.-S. & Lee, D.-J., September 2012. Revised stratigraphy of the Xiazhen Formation (Upper Ordovician) at Zhuzhai, South China, based on palaeontological and lithological data. Alcheringa 36, 393–412. ISSN 0311-5518.

Three exposures of the Upper Ordovician Xiazhen Formation at Zhuzhai, Yushan, Jiangxi Province, China are re-measured and described in detail. Comparison of palaeontological and lithological data from the exposures (designated sub-sections ZU1, ZU2 and ZU3) reveals that the sub-sections overlap stratigraphically. Nearly identical assemblages of trilobites and brachiopods occur in mudstones of ZU1 and ZU3, whereas a different assemblage occurs in those of ZU2. Identical coral species occur in the overlapped intervals of ZU1 and ZU2, and ZU1 and ZU3, respectively. In addition, a distinctive identical lithological succession consisting of brachiopod-bearing nodular limestone at the base to coral floatstone at the top is evident in the overlapped interval of ZU1 and ZU2; prism-cracked algal laminites are found in the same interval; and bioclastic limestone beds, which represent bioherms consisting mainly of corals and stromatoporoids, occur in both ZU1 and ZU3. A thrust fault system appears to be responsible for the repetition in the subsections, and the faulting was probably due to the major post-Ordovician structural movements exerted on the Zhe-Gan Platform of the Jiangnan Region of the South China Block.

Dong-Chan Lee [dclee@hit.ac.kr], Department of Heritage Studies, Daejeon Health Sciences College, 300-711, Daejeon, Republic of Korea; Jino Park [jinopark@korea.ac.kr], Suk-Joo Choh [sjchoh@korea.ac.kr], Department of Earth and Environmental Sciences, Korea University, 136-701, Seoul, Republic of Korea; Jusun Woo [jusunwoo@kopri.re.kr], Division of Polar Earth-System Sciences, Korea Polar Research Institute, 406-840, Incheon, Republic of Korea; Yi Kyun Kwon [kyk70@kigam.re.kr], Marine and Petroleum Division, Korea Institutue of Geoscience and Mineral Resources, 305-350, Daejeon, Republic of Korea; Jeong-Gu Lee [leejg@mest.go.kr], Seung-Bae Lee [sblee@mest.go.kr], Exhibition Planning and Coordination Division, Gwacheon National Science Museum, 427-060, Gwacheon, Republic of Korea; Liming Guan [glm.1103218@yahoo.com], Ning Sun [sun@andong.ac.kr], Kun Liang [ibcaskun@126.com], Lu Liu [liulu323@hotmail.com], Department of Earth and Environmental Sciences, Andong National University, 760-749, Andong, Republic of Korea; Dong-Jin Lee [djlee@andong.ac.kr], Department of Earth and Environmental Sciences, Andong National University, 760-749, Andong, Republic of Korea and College of Earth Science, Jilin University, Changchun 130061, PR China; Chul-Woo Rhee [gloryees@chungbuk.ac.kr], Department of Earth and Environmental Sciences, Chungbuk National University, 361-763, Cheongju, Republic of Korea; Byong-Song Kim [kbs1972@163.com], Department of Resources Exploration Engineering, Kim Chaek University of Technology, Pyongyang, Democratic People's Republic of Korea and College of Earth Science, Jilin University, Changchun 130061, PR China. Received 16.10.2011, revised 4.1.2012, accepted 16.1.2012.     

上林湖越窑瓷器前剂量测定年代中的热激活特性(TAC)研究

利用热释光前剂量技术方法测定瓷器年代,须对瓷器样品进行热激活特性测试,以得到一个最高的测量灵敏度,来提高测定年代的精确度。为此,对慈溪上林湖及周邻地区的狗颈山、低岭头、开刀山、瓦片涯、大路口和寺龙口六处唐、五代与北宋古瓷窑遗址的60件瓷器样品进行热释光年代测量前,进行了热激活特性测定研究。结果表明,上林湖地区的越窑瓷器样品具有非常高的热释光灵敏度,以及比较一致的热激活特性及温度。其中样品的最高热激活温度为700℃,最低热激活温度为64℃,平均激活温度为658℃。在应用前剂量技术测定慈溪上林湖及周邻地区的越窑瓷器样品年代时,采用正确的热激活温度都可以得到一个相对比较准确、可靠的年代结果。     

文物保存微环境空气氮氧化物集成净化技术研究

为研究文物保存微环境中的集成净化技术,联合采用光催化预处理和竹炭吸附技术净化低浓度的氮氧化物.研究了组合方式在不同光源下的净化效果,同时探讨了湿度对低浓度氮氧化物净化效果的影响.结果表明:在采用恰当的组合情况下,紫外线照射和可见光照射下,净化结果相差不大,最佳组合为光催化+竹炭+4A分子筛+竹炭的组合,NO和NO2的出口浓度分别可降至1.98μg/m3和1.80μg/m3;而相对湿度增加,处理效果降低,但在相对湿度为60%情况下,仍可较长时间内稳定运行,保持出口NOx在4ng/g以下.综合实验结果,光催化联合竹炭吸附集成技术净化低浓度的氮氧化物效果良好,为今后文物保存微环境中的实际应用提供科学依据.     

从美国到全球的考古学——美国考古学年会(SAA)第75届年会观感

<正>19世纪开始,近代考古学伴随着欧洲学者的身影远渡重洋,来到遥远的新大陆继续成长。今日的美国考古学已经得到了更加如火如荼的发展,并怀揣着经典理论与新生方法,走向了全球,对亚洲、大洋洲、非洲考古学的发展起到了不同凡响的带动     

满族佟佳氏马察地方考略

马察,本系满语野菜小根蒜之意.今吉林省集安县新开河谷地和老岭山脉通和岭因遍布小根蒜,被满族先民称为马察河和马察山.明季,满族佟佳氏巴笃理宗支定居于此,后归附努尔哈赤政权,马察作为地名也由此为世人所知.     

清代史官议叙制度考略

史官议叙制度是清代文官奖励体系中的重要组成部分,用以激励参与纂修史书的史官。清承明制,将议叙范围扩大,运用于史馆修史,形成修史机构议叙管理机制。嘉庆朝编《大清会典》,又将史官议叙法规化。议叙内容根据史官出身和品阶不同相应有差,包括加级加纪录、加衔、提前开复、获得选官优先权等多种。终清一代,史官议叙制度吸引了大批士人主动投身到修史活动中,有效保障了清代大规模官方修史的顺利进行,并由此带来士人职业观念上的积极变化。     

Experimental Study and Numerical Model Calibration for Earthquake-Induced Collapse of RC Frames with Emphasis on Key Columns,Joints, and the Overall Structure

A thorough investigation of earthquake-induced collapse of reinforced concrete frames is presented. The inherent correlation between the nonlinear behavior of key components and the collapse mechanism of overall frame is examined through concurrent collapse tests of both frame and key components. Important issues in the component models are investigated through calibration against experiments, leading to a comprehensive structural system model. Both test and simulation indicate that the seismic performance are predominately governed by the key columns, whereas the energy dissipation capacity is somewhat affected by the joints. This study offers systematic experimental data and numerical models for future collapse assessments.     

中国初期石窟及观佛三昧--以麦积山石窟为中心

麦积山石窟初期洞窟从造像题材、组合内容等方面反映了禅观的思想。本文从禅观经典的翻译和翻译者的出身地论述中国早期石窟所反映的禅观思想来源于犍陀罗。麦积山石窟也不例外,同样受到了犍陀罗的影响。     

我国青少年旅游网络建构的初步探讨

青少年目标市场不仅是目前旅游市场的重要组成部分,而且随着年纪的增长,他们将成为未来旅游市场的中坚。本文在这一思想的指导下,提出了建构青少年旅游网络的设想。笔者先分析了建构青少年旅游网络的可能性与必要性,在此基础上指出了现阶段青少年旅游市场存在的一系列问题,伴随着对这些问题的思考,笔者建构了青少年旅游网络的基本框架,并界定了青年旅游网络的内涵,对具体的建构工作提出了思路。