深入研究继续教育理论,推动继续教育创新与发展——中国成协成人高等教育理论研究会2006年年会述评

本文系统介绍了中国成协成人高等教育理论研究会2006年年会的主要观点,对我国继续教育面临的机遇、挑战、对策、创新与发展均有比较深入的阐述,对继续教育实际工作有十分重要的指导意义。     

网络环境下图书馆信息服务的新探索

网络环境下图书馆信息服务工作面临新的挑战。本文就网络环境下图书馆信息服务工作的有关策略做了较全面的论述。     

视讯业务新热点--视频会议系统

视频会议系统集语音、数据、图像为一体，可帮助相隔千里之外的人们实现面对面的实时沟通，它分为软件视频会议系统和硬件视频会议系统。硬件视频会议系统价格昂贵，但稳定性强，视频质量可靠；软件视频会议系统价格低廉，实现方便，易于升级维护，是视频会议系统今后的发展方向。     

Thermal mixing of two miscible fluids in a T-shaped microchannel

In this paper, thermal mixing characteristics of two miscible fluids in a T-shaped microchannel are investigated theoretically, experimentally, and numerically. Thermal mixing processes in a T-shaped microchannel are divided into two zones, consisting of a T-junction and a mixing channel. An analytical two-dimensional model was first built to describe the heat transfer processes in the mixing channel. In the experiments, de-ionized water was employed as the working fluid. Laser induced fluorescence method was used to measure the fluid temperature field in the microchannel. Different combinations of flow rate ratios were studied to investigate the thermal mixing characteristics in the microchannel. At the T-junction, thermal diffusion is found to be dominant in this area due to the striation in the temperature contours. In the mixing channel, heat transfer processes are found to be controlled by thermal diffusion and convection. Measured temperature profiles at the T-junction and mixing channel are compared with analytical model and numerical simulation, respectively.     

ON THE REE ACROSS THE PERMIANTRIASSIC BOUNDARY IN SOUTH CHINA

This paper discusses the INAA results of REE in clays atand near some Permian/Triassic boundaries of South China.It showsthat the REE patterns of boundary clays differ from those of non-boundary clays.One difference is that the boundary clays are moreenriched in LREE,with steeper slope of REE and a smaller Eu nega-tive anomaly than the non-boundary clays.Another difference is that theboundary clays show a small Ce negative anomaly,but no Ce anomalyoccurs in the non-boundary clays.From these REE patterns and some other experimental facts,it isproposed that the P/T boundary clay may be a mixed product consistingof the acidic-intermediate ash and the upper crust substance representingsputtering component,and the calculated fraction of the former andlatter is 7/3.     

Rethinking Natural Environment Practice: Implications from Examining Various Interpretations and Approaches

Early intervention professionals have implemented natural environment practices for over a decade, despite the continued debate on how to interpret and implement this practice. This article reviews several theoretical frameworks for understanding natural environment practice, and also summarizes different approaches for implementation. The authors present a model for rethinking and redefining natural environment practice in the context of recent approaches.     

企业的必然选择——绿色营销

随着人们生活水平的提高、环境意识的增强,人们的消费观念也发生了重大变化,由重视商品物质价值的传统消费观向强调以非物质为特征的绿色消费观转变,即在购物时更加注重企业及其商品对环境保护和自身健康的有益性。在这种情况下,企业必须适应市场环境,树立绿色营销观念,开发绿色产品,以此满足消费者的需求,实现自己的目标,为社会的发展做出贡献。     

教育成本分担理论评析

近年来,伴随着高等教育学生规模大幅扩容,教育资金捉襟见肘。吸引非政府资金投入教育产业是当前热门话题,学费制度改革更是其焦点之一。教育成本分担理论是这方面的基础理论,本文对该理论的提出背景和核心内容予以细述,同时指出它对当前学费制度改革的重要意义。     

基于贝叶斯网络的空间受限项目风险管理研究

空间受限项目的事故风险源多,且易诱发连锁反应。如何快速识别空间受限项目的风险源,并有效评估各个诱发节点的风险大小,对空间受限项目的风险管理具有重要意义。识别空间受限项目风险源并构造贝叶斯网络,通过贝叶斯网络推理的正向预测、反向诊断,获得各个风险源节点的后验概率,并计算风险源概率与事故发生的互信息,同时引入风险可控值概念及指标量化,构建基于贝叶斯网络的二维四区风险管理模型,提出空间受限项目风险源管理策略,最后通过一个实例对研究结果进行说明。     

情报检索语言的词汇控制问题

本文在情报检索语言和自然语言原理、交流方式等简要比较的基础上,对情报检索中词汇控制的必要性,词汇控制的内容,原则以及词汇控制对检索效率的影响,进行了探讨。