网络计量在局部Web空间中的应用

网络计量学的研究领域之一是通过对网络信息本身或网络结构单元的计量,从虚拟的Web空间反映现实空间的社会问题。这类研究将Web视为一个人和组织的网络。对目前网络计量在局部Web空间中的应用现状进行分析,将局部网络空间划分为学术空间、商业网站空间、政府网站空间和特定主题网络空间,研究重点主要体现为共链分析、网络影响因子、简单链接统计等方面,由此推论现实空间中的社会现象。数据可靠性和有效性较低以及分析工具的缺乏是当前研究的主要不足。      

社会地理学视域下的城市休闲体育空间重构

从城市社会地理学的角度出发,对社会分层下的休闲体育空间涵义进行分析,探讨基于社会分层的休闲体育空间认知规律及其发展变化过程,以上海市为例说明休闲体育空间阶层分化的现实存在性,最后在对休闲体育空间阶层分化的影响因素进行分析的基础上,针对性地提出了重构城市休闲体育空间的策略,旨在为消除由休闲体育空间阶层分化引起的不平等提供依据,促进社会和谐发展.     

利用集合差异度实现基于内容聚类的P2P搜索模型

基于内容的非结构化P2P搜索系统中直接影响查询效果和搜索成本的两个主要问题是,高维语义空间所引起的文本相似度计算复杂以及广播算法带来的大量冗余消息. 本文提出利用集合差异度实现基于内容聚类的P2P搜索模型提高查询效率和减少冗余消息。该模型利用集合差异度定义文本相似度,将文本相似性的计算复杂度控制在线性时间内而有效地减少了查询时间;利用节点之间的集合差异度实现基于内容的聚类,既降低了查询时间,又减少了冗余消息.模拟实验表明,利用集合差异度构建的基于内容的搜索模型不仅具有较高的召回率,而且将搜索成本和查询时间分别降低到了Gnutella系统的40%和30%左右.     

利用有限域上典型群几何学构造Cartesian认证码Ⅱ

利用有限域上辛几何、酉几何及正交几何的几种类型的子空间构作了若干个Cartesian认证码,计算了它们的参数.假设编码规则按照一种均匀概率分布选择,那么假冒攻击成功的概率PI和替换攻击成功的概率PS也被计算.     

A Geohistorical Study of ‘The Rise of Modern Science’: Mapping Scientific Practice Through Urban Networks, 1500–1900

Using data on the ‘career’ paths of one thousand ‘leading scientists’ from 1450 to 1900, what is conventionally called the ‘rise of modern science’ is mapped as a changing geography of scientific practice in urban networks. Four distinctive networks of scientific practice are identified. A primate network centred on Padua and central and northern Italy in the sixteenth century expands across the Alps to become a polycentric network in the seventeenth century, which in turn dissipates into a weak polycentric network in the eighteenth century. The nineteenth century marks a huge change of scale as a primate network centred on Berlin and dominated by German-speaking universities. These geographies are interpreted as core-producing processes in Wallerstein’s modern world-system; the rise of modern scientific practice is central to the development of structures of knowledge that relate to, but do not mirror, material changes in the system.

基于空间的合理排课算法分析

针对人类学习的生理特点,从满足学生需要循序渐进地掌握知识和教师需要授课时间相对集中的需求上,分析了如何使课程表安排得更加合理,在课表空间分布角度上提出课时节次、工作日合理布局的解决方案,并依此提供了一个自动排课算法的流程图。     

现代图书馆建筑空间设计理念与空间组织模式

从现代图书馆的功能出发,探讨图书馆建筑空间设计的新理念与新的空间组织模式。强调现代图书馆的空间规划与组织应以高效、灵活、开放和综合性为原则。     

Reliable automatic word spacing using a space insertion and correction model based on neural networks in Korean

Automatic word spacing in Korean remains a significant task in natural language processing owing to the extremely complex word spacing rules involved. Most previous models remove all spaces in input sentences and insert new spaces in the modified input sentences. If input sentences include only a small number of spacing errors, the previous models often return sentences with even more spacing errors than the input sentences because they remove the correct spaces that were typed intentionally by the users. To reduce this problem, we propose an automatic word spacing model based on a neural network that effectively uses word spacing information from input sentences. The proposed model comprises a space insertion layer and a spacing-error correction layer. Using an approach similar to previous models, the space insertion layer inserts word spaces into input sentences from which all spaces have been removed. The spacing error correction layer post-corrects the spacing errors of the space insertion model using word spacing typed by users. Because the two layers are tightly connected in the proposed model, the backpropagation flows are not blocked. As a result, the space insertion and error correction are performed simultaneously. In experiments, the proposed model outperformed all compared models on all measures on the same test data. In addition, it exhibited reliable performance (word-unit F1-measures of 94.17%～97.87%) regardless of how many word spacing errors were present in the input sentences.     

论排球运动技能形成中的感知觉及其培养方法

借鉴运动技能形成理论，结合自身多年教学与训练的实践经验，对现代排球技术教学训练中倍受同行们关注的视觉、空间知觉、时间知觉、运动知觉和专业化知觉的培养与发展方法进行了分析研究。     

高中数学中公理化方法改革的构想

欧几里得《几何原本》自诞生之日起，就肩负着渗透公理化思想的重任．但由于几何内容的改变，公理化方法在中学课本中的地位有所削弱．应该从作为学校课程构成法的公理化方法和作为学习对象的公理化方法2个方面加强其在中学课本中的地位，以加深学生对公理化方法的理解．