基于光谱增强指数与LeNet-5的古书画褪色文字提取与识别

古书画中所记载的文字是了解历史的珍贵资料,对褪色文字进行提取和识别是挖掘和展示历史价值的基础。本工作首次提出基于光谱增强指数与LeNet-5相结合的古书画褪色文字提取与识别方法：利用高光谱成像无损检测、光谱范围广等优点,获取古书画的高光谱数据,分析文字与背景的光谱特征,构建字迹增强指数,实现古书画中褪色文字的增强;构建LeNet-5卷积神经网络,利用手写汉字集进行训练,对密度分割后的字迹图像进行自动识别。以清代画家张士保所作《论道图》中部分褪色文字为例进行了验证,文字识别的正确率为70.8%。结果表明,本工作所提出方法可有效提高古书画褪色文字提取与识别的智能化程度。     

网络游记中的景区共现现象分析——以华东地区首批国家5A级旅游景区为例

本文以游客发表在网络中的游记为研究对象,通过对游记中呈现的景点共现次数和烈度指标的统计分析,揭示了华东地区首批国家5A级旅游景区内热门景点的分布状态;运用社会网络分析方法描绘了这些景区之间的共现关系,并依据各景区距共现核心位置的远近及其所辖景点的冷热均衡状况这两项指标将景区划分为4种类型;针对不同类型景区的特点,本文提出了相应的营销策略建议。     

Increasing returns to scale in the towns of early Tudor England

Abstract

Urban agglomeration economies make cities central to theories of modern economic growth. There is historical evidence for the presence of Smithian growth and agglomeration effects in English towns c.1450-1670, but seminal assessments deny the presence of agglomeration effects and productivity gains to Early Modern English towns. This study evaluates the presence of increasing returns to scale (IRS) in aggregate urban economic outputs—the empirical signature of feedbacks between Smithian growth and agglomeration effects—among the towns of 16th century England. To do so, we test a model from settlement scaling theory against the 1524/5 Lay Subsidy returns. Analysis of these data indicates that Tudor towns exhibited IRS—a finding that is robust to alternative interpretations of the data. IRS holds even for the smallest towns in our sample, suggesting the absence of town size thresholds for the emergence of agglomeration effects. Spatial patterning of scaling residuals further suggests regional demand-side interactions with Smithian-agglomeration feedbacks. These findings suggest the presence of agglomeration effects and Smithian growth in pre-industrial English towns. This begs us to reconsider the economic performance of Early Modern English towns, and suggests that the qualitative economic dynamics of contemporary cities may be applicable to premodern settlements in general.     

Constitutionalists,Despots, Whigs,and Revisionists: Tudor Parliamentary History in the 20th Century

The 20th century was the great age of Tudor parliamentary history. This essay examines the contributions and profound changes to the field made by the leading historians of the era, especially Sir John Neale and Sir Geoffrey Elton. Taking as its starting point the whiggish ideas of Stubbs's Constitutional History of England, it traces the impact of A.F. Pollard, G.M. Trevelyan, and Sir Lewis Namier on the field. At its core, though, lie the often acrimonious differences of opinion between Neale and his pupil, Elton. For Neale the Elizabethan parliaments were characterised by an increasingly puritanical Commons eager to wrest control of debates on religion and the succession away from the queen. In so doing this created a constitutional clash that would eventually lead to civil war in the mid 17th century. This ‘orthodoxy’ was savagely critiqued by a revisionist ‘school’ led by Elton that dismantled the interpretation of Neale and replaced it with an institution that was not dominated by political conflict but by largely consensual politics. It was also a position that gave equal weight to the Lords and to the importance of the business of parliament – legislation. The revisionists were masters of critique and highly effective at demolishing Neale, but did little to replace his theories or to explain religio‐political conflict – in doing so it could be argued that they killed the subject. The essay ends by suggesting some new approaches to Tudor parliaments that could help revitalise the subject.     

Race and hospitality: Allied troops of colour on the South African home front during the Second World War

Though often marginalised in histories of the Second World War, South Africa, in addition to contributing manpower and economic support to the Allied war effort, was a transport hub and a site for military training. Millions of Allied servicemen and women spent time in South Africa, which became an important node in both imperial and Allied wartime networks. Examining the varied experiences of Allied personnel of colour in South Africa, with a focus on the Māori battalion, this essay, working towards a transnational social history of the conflict, highlights the ways in which wartime hospitality both reflected and subverted ideologies and practices of racial segregation.     

Disciplined love: the Chinese Communist Party’s wartime restrictions on cadre love and marriage

ABSTRACT

During the Chinese War of Resistance against Japanese Aggression and the Civil War, the Chinese Communist Party (CCP) imposed restrictions on the marriage of its cadres, so as to maintain the Party’s effective control and combat cohesion. The Central Committee of the CCP did not issue uniform regulations on this topic; most decisions were made by the base areas, with the indirect support of the Central Committee. Marriage and love are personal matters, and the restrictions certainly caused emotional suffering for ordinary cadres affected. However, there were important reasons for the CCP’s implementation of these measures. Through punishment and guidance, these restrictions were carried out smoothly and did not cause great upheaval. As love and marriage became areas subject to the political power of the CCP, they unexpectedly became a focal point of the collision between individuality and Party spirit and between the individual and the group.     

Age changes in bone microstructure: do they occur uniformly?

Age estimations based on conventional multifactorial methods were compared with trends observed in the internal morphology of bones obtained from high‐resolution µCT. Specifically, average trabecular thickness and number of trabeculae/mm transect were determined in the non‐load‐bearing capitate (hand) and the load‐bearing navicular (foot). The µCT findings reveal age‐related trends but—surprisingly—these correspond only loosely with the ages assigned by conventional ageing methods, and are also not in accordance with what would be predicted from biomechanical considerations: trabeculae tend to be thinner in the (habitually) load‐bearing navicular than in the (habitually) non‐load‐bearing capitate. While the statistically significant correlation between trabecular thickness and number of trabeculae would suggest a compensatory mechanism between these two aspects of microanatomy, they are not correlated with the assigned ages and, importantly, may differ between sexes. Only in females is there an unequivocal trend towards trabecular thickness increase with age. These findings, although unexpected, can be reconciled with recent histological evidence and assumed average activity levels in historical populations. Conversely, changes in trabecular number are less clear‐cut and may be due to the lack of very old individuals in the sample. Nevertheless, the trends observed for trabecular thickness, as well as for trabecular number, seem to imply that the higher incidence of osteoporosis in women could be explained from a structural point of view alone. Copyright © 2005 John Wiley & Sons, Ltd.