当代鉴定史上的风华绝唱——怀念徐邦达先生

一年前,就听说徐邦达先生已卧床不起,日常生活需要护士照料,有人去看他,只能用眼神示意。人生百年,明知道迟早会有的事．但不愿听到的消息还是传来了,徐先生走了。     

近代东亚工业技术的演化:以丰田织布机为例

丰田织布机的创造和传播是近代东亚工业技术演化的一个实例。丰田佐吉凭借"逆着潮流游泳"的熊彼特式企业家精神,成功开发了丰田织布机这一技术产品,带动了日本工业化的发展。1920年代,通过拆解仿制,中国的大隆机器厂等企业也成功制造出丰田织布机。抗战胜利后,中国机器制造公司通过丰田的技术转让,获取了丰田式自动织机的制造能力。发明创新、逆向工程与技术转让构成了近代东亚工业技术演进的三条路径,后发国家需要凭借企业家的精神动力克服技术演化中的难关,尤其需以"非理性"的动机超越市场需求中理性决策对技术发展的抑制。对后进国的技术演化而言,意识形态起着关键作用。     

HARMONY AND CONFLICT BETWEEN MANKIND AND ANIMALS --A Travelodge in the ＂No-man＇s Land＂ of North Tibet

<正>In recent years,improvements in the eco-environment have made possible the recovery of biological diversity amongst living things in the uninhabited area of ...     

我国生态农村建设之探索

生态农村建设是当前建设社会主义新农村的重大举措。论文从农村的生态环境、基础条件和农民意识等方面,探讨了我国农村生态环境中存在的问题,指出了加快农村生态建设的重要性,提出了加强乡镇企业环境综合整治、完善体制机制建设、发展生态农业、开展生态文明教育等措施,并针对我国农村生态建设的现状和特点,探索一种适合我国农村实际情况的可持续发展模式,即以经济发展为基础,以科技应用为支点,以政府干预为手段,以制度创新为引导,以法制完善为保障,以意识提高为导向。     

20世纪80年代邓小平国家安全思想论析

20世纪80年代,邓小平继承和发展了毛泽东的国家安全思想,紧紧围绕以经济建设为中心,积极营造有利的国家安全环境,使中国经济迅速发展,综合国力和国际地位不断提升,国家安全得到了切实有力的保障。邓小平的国家安全思想是理性和务实的,适应了当时国内发展任务的需要,对中国的安全战略起过重大的指导作用,也为后来的国家安全决策提供科学的依据和借鉴。     

Shake Table Test and Numerical Analysis of a Bridge Model Supported on Elastomeric Pad Bearings

Elastomeric pad bearings are widely applied in short- to medium-span girder bridges in China, with the superstructure restrained by reinforced concrete (RC) shear keys in the transverse direction. Field investigations after the 2008 Wenchuan earthquake reveal that bearing systems had suffered the most serious damage, such as span falling, bearing displaced, and shear key failure, while the piers and foundations underwent minor damage. As part of a major study on damage mechanism and displacement control method for short- to medium-span bridges suffered in Wenchuan earthquake, a 1:4 scale, two-span bridge model supported on elastomeric pad bearings were recently tested on shake tables at Tongji University, Shanghai. The bridge model was subjected to increasing levels of four seismic excitations possessing different spectral characteristics. Two restraint systems with and without the restraint of RC shear keys were tested. A comprehensive analytical modeling of the test systems was also performed using OpenSees. The experimental results confirmed that for the typical bridges on elastomeric pad bearings without RC shear keys, the sliding effect of the elastomeric pad bearings plays an important role in isolation of ground motions and, however, lead to lager bearing displacement that consequently increases the seismic risk of fall of span, especially under earthquakes that contain significant mid-period contents or velocity pulse components. It is suggested from the test results that RC shear keys should be elaborately designed in order to achieve a balance between isolation efficiency and bearing displacement. Good correlation between the analytical and the experimental data indicates that the analytical models for the bearing and RC shear key as well as other modeling assumptions were appropriate.     

弦歌台大成殿文物建筑彩绘颜料成分分析

弦歌台又被称为绝粮祠，整体布局以中轴线为中心呈现东西对称，现存建筑的规制为三进院落，从南向北依次为正门、戟门、大成殿、弦歌书院。大成殿作为弦歌台最核心的建筑，外观气势宏伟，彩绘精美绝伦，是我国东部地区规格较高的孔庙建筑之一。弦歌台大成殿在自然环境和人为因素的长期影响下，彩绘表面出现了褪色、龟裂、颜料脱落等多种病害，彩绘修复工作已成为当前文物保护亟待解决的棘手问题。本工作对彩绘样本的层位和形制进行详细分析，从剖面和表面等多角度进行全面研究，发现大部分彩绘样本由内向外的结构依次为基底层、地仗层、颜料层，蓝色彩绘样本所使用的地仗层为传统的单披灰工艺，与之不同的是红色彩绘样本为无地仗彩绘，红色颜料层直接绘制于基底层上，推测这可能与时代的发展及工艺的变化有关。为了更好地服务文物进行科学保护，需要了解大成殿彩绘颜料成分及制作工艺等。采用超景深微观分析、扫描电镜及能谱仪分析、显微拉曼光谱分析等现代技术及方法，对彩绘颜料样本进行了层位结构、微观及成分检测分析。结果表明，在制作工艺上，大成殿彩绘颜料层剖面多为两层以上叠加，是明显的重层彩绘，说明历史上至少经历过两次以上重绘。同时发现大成殿彩绘颜料层既有重...     

New Early Triassic Lingulidae (Brachiopoda) genera and species from South China

Peng, Y. & Shi, G.R., June, 2008. New Early Triassic Lingulidae (Brachiopoda) genera and species from South China. Alcheringa 32, 149–170. ISSN 0311-5518.

Two new genera, Sinolingularia gen. nov. and Sinoglottidia gen. nov., together with three new species, Sinolingularia huananensis gen. et sp. nov., Sinolingularia yini gen. et sp. nov. and Sinoglottidia archboldi gen. et sp. nov., are described on the basis of a large collection of well-preserved specimens from several sections straddling the Permian – Triassic boundary in South China.     

Discovery of late Changhsingian (latest Permian) brachiopod Attenuatella species from South China

Cretaceous polar dinosaur faunas were taxonomically diverse, which suggests varied strategies for coping with the climatic stress of high latitudes. Some polar dinosaurs, particularly larger taxa such as the duckbill Edmontosaurus Lambe, 1917 Lambe, L. M. 1917. A new genus and species of crestless hadrosaur from the Edmonton Formation of Alberta. Ottawa Naturalist, 31: 65–73.  [Google Scholar], were biomechanically and energetically capable of migrating over long distances, up to 2600 km. However, current evidence strongly suggests many polar dinosaurs (including sauropods, large and small theropods, and ankylosaurs of New Zealand) overwintered in preference to migration. Certain groups also appear more predisposed to overwintering based on their physical inability (related to biomechanics, natural history, or absolute size) to migrate, such as ankylosaurs and many small taxa, including hypsilophodontids and troodontids. Low-nutrient subsistence is found to be the best overwintering method overall, although the likelihood that other taxa employed alternative means remains plausible. Despite wide distribution of some genera, species-level identification is required to assess the applicability of such distributions to migration distances. Presently, such resolution is not available or contradicts the migration hypothesis.