现代大学图书馆公共空间内涵探析

公共空间不仅是现代大学图书馆的重要组成部分,而且是现代大学图书馆社会功能的实践载体。论文从文化公共空间、学习公共空间、知识共享空间、信息交流空间四个方面对现代大学图书馆公共空间内涵进行了全面揭示。

国内图书馆读者活动的研究及思考

图书馆举办读者活动是读者服务的重要内容之一。近几年来,读者活动无论在实务与研究上都取得了长足的进步,但是对于读者活动的认识,业界仍有待加强。随着图书馆服务内外环境的变化,读者活动因其交互性、外向性、开拓性,将为图书馆读者服务打开新的空间。

Gaussian process assisted coevolutionary estimation of distribution algorithm for computationally expensive problems

In order to reduce the computation of complex problems, a new surrogate-assisted estimation of distribution algorithm with Gaussian process was proposed. Coevolution was used in dual populations which evolved in parallel. The search space was projected into multiple subspaces and searched by sub-populations. Also, the whole space was exploited by the other population which exchanges information with the sub-populations. In order to make the evolutionary course efficient, multivariate Gaussian model and Gaussian mixture model were used in both populations separately to estimate the distribution of individuals and reproduce new generations. For the surrogate model, Gaussian process was combined with the algorithm which predicted variance of the predictions. The results on six benchmark functions show that the new algorithm performs better than other surrogate-model based algorithms and the computation complexity is only 10% of the original estimation of distribution algorithm.

公共外交对国际关系理论的冲击:一种分析框架

公共外交是指一国政府对国外民众的外交形式 ,它的活动手段包括文化交流项目、国际广播和互联网等 ,其主要表达形式是信息和语言。目前 ,学界围绕公共外交争论最多的是它的理论归属问题。主流国际关系理论的基本前提是国际体系的“无政府状态” ,这一状态中冲突常有而合作不常有 ,从而使以信息和语言为主导、以非行为体国外民众为对象、强调“合作度”的公共外交难以获得概念上的支持。本文认为 ,随着全球化和信息化的深入发展 ,特别是愈来愈多的学者和决策者正把国际体系定义为“信息交流空间”而不是外部无序状态 ,公共外交可以实现其理论回归 ,融入国际关系理论。