基于泛在信息社会/环境的数字参考咨询服务

本文界定了数字参考咨询服务的概念,简要介绍了数字参考咨询服务特点;回顾了数字参考咨询服务的历史;对在泛在信息社会/环境下的数字参考咨询服务的模式给予了推介,同时对数字参考咨询服务的发展远景进行了展望。     

建设中小学信息资源保障体系的必要性和现实意义

针对我国中小学文献信息资源建设和利用的现状，探讨建设中小学信息资源保障体系的必要性和现实意义。     

Representation strength in pigeon short-term memory: Effect of delay training

An attempt was madeto manipulate the strength of internal stimulus representations by exposing pigeons to brief delays between sample offset and comparison onset in a delayed conditional discrimination. In Experiment 1, pigeons were first trained on delayed conditional discrimination with either short (0.5-sec) delays or no delays. When delays were increased by 2.0 sec, birds trained with a delay performed at a higher level than did birds trained with no delays. In Experiment 2, subjects were first trained on a delayed simple discrimination. Following a circle stimulus, responses to a white key were reinforced; however, following a dot stimulus, responses to the white key were not reinforced. The pigeons were then trained on a delayed conditional discrimination involving hue samples and line-orientation comparisons with differential outcomes. Choice of vertical following red yielded food; choice of horizontal following green yielded no food. Mixed delays were then introduced to birds in Group Delay, whereas birds in the control group received overtraining. When tested on a delayed simple discrimination with hue stimuli (red and green initial stimuli followed by white response stimulus), pigeons in Group Delay tended to perform at a higher level than did birds in the control group (i.e., although the birds in both groups responded more following red than following green, birds in Group Delay did this to a greater extent than did birds in the control group). Thus, experience with delays appears to strengthen stimulus representations established during training.     

现代企业信息资源优化配置

从广义的信息资源出发,论述了现代企业信息、信息人才、信息技术等资源配置的必要性,企业信息资源配置的基本要求,微观配置结构优化的内容和宏观配置的类型及其特点。     

旅游管理专业酒店实习中三方利益诉求差异方差分析及融合

在地方本科院校旅游管理专业与酒店企业的教学实践合作过程中,尽管涉及的三方(地方本科院校、酒店企业和实习生)关系已经多年磨合而改善,但是,三方仍表现出较显著的差异性利益诉求。本文试图通过探索三方利益诉求差异的内容、差异形成的原因以及融合三方利益诉求差异的途径,为地方本科院校实现培养目标、酒店企业实现人才储备、实习大学生得到实践锻炼,从而最终实现三方诉求有效融合提供参考借鉴。     

浅谈极限计算法的分类

本文给出初等函数和由初等函数构成的分段定义的函数的极限计算的常用方法。讲明定义区间内初等函数值等于极限值。在某些“未定义”点的极限则以例的方式分类详细分析阐述。