传统方法加固馆藏浮放文物抗震性能试验

为探索馆藏浮放文物的有效抗震加固方法,采用振动台试验手段,研究了传统方法加固浮放文物的抗震性能。基于故宫博物院某展柜原型尺寸,制作了1:1比例陈列柜模型。在陈列柜内浮放一轻质陶瓷文物,分别考虑采用砂子、塑料卡、鱼线、橡皮泥及磁铁加固文物,进行了振动台试验。通过白噪声激励,获得了陈列柜基频分布;通过输入不同强度、不同类型的地震波,获得了不同方法加固条件下陈列柜和文物的位移响应、加速度响应和和动力放大系数,评价了不同方法的加固效果。结果表明:陈列柜的基频与输入地震波相差较大,这是陈列柜震害不明显的主要原因之一;传统方法加固文物后,输入地震波的加速度仍有一定放大,但是与加固前文物相比,文物的位移和加速度响应均有所减小,且文物因摇晃幅度而产生倾覆的可能性减小。此外,从减小文物加速度响应峰值角度考虑,橡皮泥和鱼线加固文物效果优于其它方法。试验结果可为文物防震保护研究提供较全面的参考。     

迟发展效应的后发劣势与后发优势--对西部大开发的启示

介绍了迟发展效应的概念,论述了其负面效应与正面效应--后发劣势与后发优势的内涵及相互转化。对我国西部大开发的启示是,西部欠发达地区能否崛起,能否赶上并超过先发地区的关键,是看其能否将经济发展理论及建设经验与当地的具体情况有机地结合起来,恰当地选择区域开发战略和经济发展的切入路径和突破点,适时地采取一些积极应对策略措施,挖掘、激活后发劣势中的正面效应,强化其相对优势成分,抑制其负面影响,顺利地跨越"瓶颈",创造性地找到一条适合自己的发展道路,从而成功地将后发劣势转化为后发优势。     

What Do Objects Want?

This paper develops an argument for the agency of objects, looking at the effects objects have on people. Groups of related objects, such as pots or metal ornaments, create stylistic universes which affect producers and users of new objects, bound by the canons of style. For an object to be socially powerful in a recognized manner, the form of the object lays down certain rules of use which influence the sensory and emotional impacts of the object. Formal properties of artifacts are influenced by the genealogy of the object class, including historical continuities and changes, and also its perceived source. The forms of objects, the historical trajectories of the class of objects and their perceived sources combine to have social effects on people, shaping people as socially effective entities. Britain’s incorporation into the Roman Empire between 150 BC and AD 200 provides an excellent case study through which to look at the changing corpora of objects, which had continuities and changes in form, a set of subtle attributions of sources and a complex range of social effects.     

上海的边缘城市

边缘城市是国际上的一门新兴的学科,它往往是新兴产业的依托点。本文研究并分析了上海的边缘城市,及其空间分布规律。发现边缘城市出现在距离上海市中心20公里以上,且靠近交通线的地方,但是不位于交通枢纽上,同时边缘城市往往是一个新经济增长阶段的产物。     

基于模糊综合评价的标识牌解说效果研究——以北京松山国家级自然保护区为例

标识牌是目前被运用最为广泛的解说媒介之一,但我国现阶段对自然保护区标识牌的研究偏重于规划设计方法与内容,对其解说效果的研究明显不足。本文基于以上背景,选择具有代表性的北京松山国家级自然保护区为研究区,从游客视角出发对标识牌解说效果进行研究。运用因子分析法,构建了研究区标识牌评估指标体系,包括标识牌外型、解说技巧和解说内容等三个方面共21项因子。并采用多层次模糊评价法,定量评价了研究区标识牌的解说效果。评估结果表明,研究区标识牌外型因子和解说内容因子解说效果中等,解说技巧因子解说效果较差。     

Designing the nation. Banknotes, banal nationalism and alternative conceptions of the state

This paper explores the relationship between national iconography, banal nationalism and conceptions of the state. It begins by reviewing scholarship on visual culture associated with official products of the state: namely, stamps and money. This reveals a preoccupation with content analysis and a tendency to assume state control over the symbolic content of money (and stamps) without clarifying the nature of design processes, the nature of state involvement in these processes, or how ‘the state’ is being conceptualized. The paper addresses these lacunae, beginning with an examination of approaches to banknote design and clarification of the role of the state in these processes. This analysis reveals that non-state actors and institutions are frequently responsible for this key mechanism of official iconographic representation and this, in turn, supports calls for a reassessment of the concept of the state. After outlining an alternative conception of the state, as an idea that produces ‘state effects’ rather than an empirical entity separate from society, the value of this concept is illustrated by showing how it can explain banknote production in the stateless nation of Scotland. The revelation that commercial banks can be co-constitutive of state effects – things like banknotes, national institutions, iconography and identity – challenges presumptions of a discrete state that controls its own representation and the regulation of society.     

What to do with vacant and abandoned residential structures? The effects of teardowns and rehabilitations on nearby properties

In the presented paper, we estimate the impacts of three distinct housing policy interventions to deal with distressed and abandoned residential properties: leaving vacant buildings in their current state, remodeling/rebuilding residential structures, and razing vacant structures. We show that vacant structures negatively impact nearby housing up to 4.1%, but when demolition is followed by complete reconstruction, neighboring housing can be appreciated by as much as 14.1%. In addition, negative spillover effects from foreclosures and vacant buildings are primarily observed in low‐income and middle‐income Census tracts, whereas positive spillover effects generated by remodeling are seen in high‐income Census tracts.     

SEGMENTAL CROSS-SPECTRUM AS A NEW TECHNIQUE IN SITE RESPONSE ESTIMATION USING SPECTRAL RATIO ANALYSIS

Different aspects of spectral analysis for site response evaluation are investigated in this study. The segmental cross-spectrum is proposed in spectral analysis of earthquake ground motions. The performance of segmental cross-spectrum in contrast with the conventional methods is investigated through the mathematical modelling, numerical analysis and application to earthquake data recorded at Chiba and Shinfuji downhole arrays in Japan. In analysis of earthquake data, the soil amplification function is identified using both uphole/downhole (U/D) and H/V spectral ratios. The advantage of seg-mental cross-spectrum is assessed by comparing identified amplification functions using different spectral methods and theoretical soil response. The reliability of site response estimations obtained by H/V spectral ratio using segmental cross- and Fourier spectra is also examined by means of cross-validation with the U/D spectral ratio of earthquake motion and theoretical soil response. Furthermore, the application of segmental cross-spectrum in nonlinear soil response is examined by comparing the amplification function of weak and strong motions for both methods. The results validate the advantage of segmental cross-spectrum in both linear and nonlinear soil response, particularly, when it used with H/V technique.