WWW中文信息自动分类方法研究

本文采用一种基于词的归类技术。在类别词专指度的计算中 ,考虑了类别词在语料中的频度、集中度和分布性等因素。根据HTML语言的标记特性 ,应用三维加权分类算法计算类别权值。采用Bayes公式变型 ,计算WWW中文信息文件归类可信度 ,并按可信度最大归类。对 10 8篇试语料进行测试 ,封闭测试的归类正确率为98 1% ,开放测试的正确率为 83 3%。     

汉代导引文化研究

中国古代导引源远流长，内涵丰富，在两汉时期有较大的发展。汉代导引丰富的内涵是汉代化融合的折射，同时又给予相应的化以影响。因此从化的视角探析汉代导引的发展，对完整地理悟中国古代体育化的发展具有重要的历史现实意义。     

如何扩大科技期刊的读者群

科技期刊走向市场后，竞争十分激烈。由于一般科技期刊专业性很强，读者少、订量小、经费短缺，因此，其生存与发展面临很大困难。科技期刊的生存与发展在很大程度上取决于读者的多少，读者是期刊的消费者，只有扩大刊物的读者群，才能全方位地扩大刊物的影响，使科技期刊走出困境，发挥其正常功能，在市场竞争中立于不败之地。 首先，杂志社要有一大批固定的作者群。作者往往也是读者，而且不是一般的读者。杂志社应当定期或不定期地与他们联系，让他们及时了解刊物的情况，特别是刊物的最新动向，并经常请他们给杂志社工作和刊物本身提出意见和建议，使他们感觉到自己也是杂志社的一员，或者把刊物看做是自己的刊物。杂志社承办各种学术会议时，如有可能要诚恳地邀请他们参加，并为他们提供方便条件。杂志社应重视开发作者资源，使他们成为沟通杂志社与新读者之间的桥梁，充分发挥作者队伍的作用。这样无形中不仅扩大了刊物的影响，而且扩大了读者群。     

Environmentally-induced stone decay: the cumulative effects of crystallization–hydration cycles on a Lincolnshire oopelsparite limestone

An investigation has been undertaken at St Andrew’s church, Walpole St Andrew, Norfolk, to establish the underlying causes of the observed stone decay to the upper parts of the six stone piers. The stone decay was first recorded in the early 1930s. The salt-contaminated masonry within the church has been shown to undergo severe salt decay during the summer, with little damage occurring over the winter months. The south aisle piers have been shown to decay 2.5 times faster than the north aisle piers. Although crystallization–hydration cycles have been identified, the rate of decay is at its greatest when the cycling is relatively infrequent. This was not the expected trend. Furthermore, it has been shown that during extended periods where the ambient relative humidity is less than 75%, the rate of decay reaches a maximum. It is the length of this ‘drying’ period that apparently has the greatest influence on the rate of decay and could explain the significant difference in the rate of decay between the south and north aisle piers. The results have serious implications for passive conservation, where it is often recommended to lower the ambient relative humidity to well below the equilibrium relative humidity of the salt contaminant, to avoid crystallization–hydration cycles. Since, at the time of building, the church was situated on the coast, it is possible that the sodium chloride contamination occurred during the building process (1440–1520), particularly since the area was prone to sea-flooding at this time. Alternatively, the salt could have been applied as a treatment during the general restoration of 1897. Whatever the source of the salt, it seems likely that the ambient environment was changed by the insertion of a sealed floor in 1897, which could account for the onset of the salt decay.     

Internet信息检索分析与研究

综述了目前Internet 网上信息检索的主要方法及存在的问题, 并对其检索技术进行了深入的分析与比较。介绍了机器学习、智能A gent、信息过滤等新技术在信息检索中的应用, 并采用神经网络Hopfield 模型及算法进行词汇扩充来提高用户的检索提问表达, 从而提高了网上信息检索的能力。     

The Buffalo Medical Journal: 1845-1919

Fielding H. Garrison's paper "The medical periodical and the scientific society" cited the Buffalo Medical Journal in the company of eminent periodicals published in Berlin, Boston, and Edinburgh. This article provides an overview of the Journal and places it in context of 19th-century medical journalism. The Journal is assessed in terms of original scientific contributions and as a source of social and local history.