“图书馆之城”框架下馆校体系化合作的黄埔模式

文章基于广州市“图书馆之城”建设框架,针对目前“馆校合作”遇到的合作零散、内容单一以及缺乏整体性等困境和问题,以黄埔地区为例,从整体设计入手,围绕1+2+N“馆校合作”模式,通过组织保障、统一平台、规范业务、整合资源、示范带动、优势互补、区域协同“馆校合作”体系化实施路径,解决馆校之间各自为政、资源割裂、资源重复购买以及服务与管理等问题,以期推动馆校深度融合发展。

合作学习在地方高校教育中应用问题研究

以合作学习在地方高校教育中应用问题作为研究对象,结合自身的工作实践,并通过与其他教师的交流、观摩学习其他学校的课程设计以及对前人文献的研究等几个途径,对合作学习在地方院校的应用中出现的问题作出分析,并提出了一些解决的建议。

Dissolution behaviors of Ta_2O_5,Nb_2O_5 and their mixture in KOH and H_2O system

The dissolution behaviors of Ta2O5,Nb2O5 and their mixture in KOH and H2O system were investigated.A L9(34) orthogonal design was used to study the effects of reaction temperature,mass ratio of KOH to Ta2O5,and reaction time on the dissolution rate of tantalum.It was found that the effect of reaction temperature on the dissolution rate of tantalum was much greater than that of the other factors.The results of factorial experiments showed that Ta2O5 was mainly transformed into insoluble potassium tantalate at low temperature(350 ℃) and transformed into soluble potassium tantalate at high temperature(450 ℃).The insoluble potassium tantalate was analyzed by XRD,which was proved to be KTaO3.Differently,almost all Nb2O5 was transformed into soluble potassium niobate at 350-450℃.As for the mixture of Ta2O5 and Nb2O5,the dissolution rate of tantalum increased and the dissolution rate of niobium decreased as an interaction existed between niobium and tantalum.And increasing the mole ratio of Nb2O5 to Ta2O5 in the mixture was beneficial to the dissolution of both Ta2O5 and Nb2O5.In addition,the mechanism of the interaction between niobium and tantalum was also investigated through phase and chemical analysis.