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1.
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。  相似文献   
2.
试论人类身高的地域差异规律及其成因   总被引:1,自引:0,他引:1  
人类身高高纬高于低纬,牧区高于农区、沿海高于内地、低海拔高于高海拔、城市高于农村、发达国家高于发展中国家。其主要原因是气温的高低、光照的多少和营养的差异。  相似文献   
3.
Callum Ward  Erik Swyngedouw 《对极》2018,50(4):1077-1097
In this paper we argue that “assetisation” has been a central axis through which both neoliberalisation and financialisation have encroached in the post‐Fordist era. We focus on the mobilisation of land as a financial asset in northwest England's former industrial heartlands, offering an account of how property developer the Peel Group came to dominate the land and port infrastructure of the region through aggressive debt‐led expansion and, in particular, a hostile takeover of the Manchester Ship Canal for its land‐bank. In doing so, we illustrate how the capture of resources, especially land, by private corporations has shaped both substance and process of neoliberalisation from the ground up. By focusing on transformative struggles over land we contribute to research agendas attempting to understand the systemically dispossessive nature of assetisation, its relationship to fictitious capital formation, and the way such neoliberalising transformations are produced through grounded and situated socio‐spatial struggles.  相似文献   
4.
本文对明清时期的瑶族向西南边疆及越南、老挝等东南亚国家的迁徙进行了探讨。认为明清时期,由于封建统治阶级的政治压迫和经济剥削,以及刀耕火种游耕生产方式、自然灾害等方面的原因,瑶族被迫从湖南及湘粤桂边界大规模向西南边疆及东南亚一带迁徙,并由此而引起瑶族人口和其文化中心的转移,形成新的文化特征,瑶族亦由此而成为跨境民族。  相似文献   
5.
This article advances the existing literature on British imperial aeronautics by explaining how Lord John Montagu’s extensive collaboration with military and government officials during the first decades of powered flight expanded the global distribution of the air forces and anticipated their important later role in facilitating international communication and security. In reconsidering problems of conquest and governance through an aeronautical perspective, Montagu strengthened critical junctures between British civil and military affairs, while his innovative employment of the new technology also complicated divisions between the metropolis and periphery in ways that would intensify the destructiveness of modern warfare across the planet.  相似文献   
6.
From 1955 to 1988, the Royal Australian Air Force (RAAF) maintained a large airbase in Northern Malaysia. For the first 15 years of its existence, RAAF Butterworth had a modest and incomplete perimeter fence. With the end of British military colonialism in Malaysia and Singapore following the implementation of the ‘East of Suez’ policy, the Australians became preoccupied with their physical security and the role of the perimeter fence. By exploring the adoption of practices of exclusion via physical barriers in the wake of British withdrawal, this paper argues that the changing psychological outlook of Australian military officials reflected broader Australian anxieties about their own sense of ‘Britishness’ and the nation’s place in a decolonising Asia. As the Australians lost their British ‘blanket’ they built a fence.  相似文献   
7.
This paper provides an analysis of images associated with the British Royal Air Force's recent ‘Be Part of the Story’ war comic-styled military recruiting campaign. Set around literatures in popular geopolitics, the paper builds on the concept of comic book visualities to suggest that the ‘Be Part of the Story’ images reproduce longstanding war comics conventions, and coherently represent the complex, relational and spatially disparate battlespaces of the present. The paper, firstly, provides a detailed history of war comics as they have mediated war to publics, and argues that war comics should figure more strongly in future studies of popular geopolitics. Secondly, it argues that more than simply part of a pervasive ‘cultural condition’ of militarization, military recruitment is a vital medium through which states and militaries view, and choose to represent their role in the world. Lastly, it demonstrates that ‘Be Part of the Story’ reproduces the violent visions, metaphors and cultural designations integral to state-centric narratives of global politics, and specifically, spatial principles inherent to network-centric warfare.  相似文献   
8.
本文结合南北朝至隋末区域文化合流的背景,考察隋末唐初秦府集团成员的仕进状况,其中包括人才类型、家庭政治背景、个体政治势力来源、进入秦府的渠道、个体政治活动空间,认识了以李世民为核心的秦府政治集团,利用争夺天下之机,逐步拓展政治空间,将各地各类精英人才吸纳到秦府集团里来。在此过程中,李世民集团有意识地编织原北周、北齐、南陈入杨隋政治势力后裔,并用关陇、山东、江左这三大政治文化区域人才所长,将他们化入到同一个文化熔炉里融冶,大大推进了区域文化合流的步伐,在中华民族文化融合史上写下了崭新的篇章。  相似文献   
9.
宁绍地区早期遗址群的时空变化是钱塘江以南聚落考古研究的重要课题。本文全面收集了这一地区的考古资料,着重从量化分析的角度,对距今7000~3000年间的遗址进行了考古地理学考察。在提取高分辨率年代序列的基础上,绘制出多幅遗址群分布地图,初步恢复性重建了宁绍平原考古时代的聚落群景观。  相似文献   
10.
Argentinean philosopher León Rozitchner theorized the political potential of the Peronist movement through a unique analytical matrix drawing upon Marxism, psychoanalysis and phenomenology. This essay will explore how Rozitchner’s interpretation of Freud’s theory of group psychology in Freud y los límites del individualismo burgués (Freud and the Limits of Bourgeois Individualism, 1972) approaches the figure of the mass in ethical, political and historical terms. I argue that Rozitchner articulates these three dimensions of the mass by viewing its libidinal constitution through a unique historical-materialist lens. Freud y los límites… thus asks us to consider the question of the drive’s sublimation at stake in Freud’s theory as a technique of social reproduction and, simultaneously, as a directly productive form of labour. In this sense, the organization of libidinal investment that constitutes the mass also holds the key to its potential social emancipation. Furthermore, while Rozitchner’s view of subjectivity often appears as transhistorical in scope, his approach to the productive activity of the drive in Freud y los límites… asks us to consider the ethical stakes of sublimation in relation to a specific historical moment of capitalist exploitation. Read through this tension, Freud y los límites… thus ultimately underlines the historical conditions of the ethical transformation it demands.  相似文献   
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