差信道环境下简单有效的图像传输方法

The constrained Viterbi algorithm (C-VA) makes use of some prior reliable information to reduce complexity andimprove performance of Viterbi algorithm (VA). However it can only be used in the concatenate code scheme because thedetection result of cyclic redundancy check code (CRC) is exploited to provide reliable information. In this paper, a differentway is proposed to provide reliable information for C-VA, which is possible to be used in simple codec. Known bits were addedto the set partitioning in hierarchical trees (SPIHT) coded image sequence periodically and directly. They were thought to bereliable information for C-VA in the decoder. Experimental results show that the proposed scheme can obtain much bettererror resilient ability compared with conventional VA under the extremely inferior channel condition if the best desired qualityof reconstructed images can be sacrificed.     

平衡计分卡:一种革命性的企业经营业绩评价方法

传统的企业业绩评价方法基本上是采用财务指标体系对企业业绩加以评价。平衡计分卡是适应20世纪80年代以后的企业内部条件和外部环境的新变化而诞生的，而通过建立一整套财务与非财务指标体系来对企业业绩和竞争状况加以综合评价。该方法的提出及应用使传统的企业业绩评价方法受到了严峻挑战，被西方财务界誉为企业业绩评价中的一场重大革命。     

浅析室内设计与产品设计的关系

室内设计与产品设计是相关于人的设计的两个不同的领域.室内设计不仅是对空间、界面等人与环境的关系问题的把握与设计,也是对室内产品的设计与布置;产品设计不仅要考虑人,而且要考虑到与人所在环境的协调一致性.室内设计与产品设计互为补充,共同发展.随着社会的进步与人们生活水平的不断提高,室内设计与产品设计的关系将更为密切,并趋于高度协同化状态.     

欠发达地区中小学网络教育的发展现状与思考

针对欠发达地区网络教育中存在的问题，提出了提高认识，转变思想，多种渠道筹集资金，加强师资培训等具体建议。     

高校诚信教育问题探讨

社会上一些领域的道德滑坡，少数高校教师的学术腐败，给大学生诚信道德品质的形成带来严重的负面影响。高校的诚信教育面临严峻的形势，为加强对大学生的诚信道德教育，提高教育的实效性，应积极营造诚信的社会环境树立诚信的师德风范，强化学生诚信道德体验，建立诚信道德约束机制。     

金庸武侠小说的江湖特征

武侠小说以江湖为侠客活动的背景和空间,金庸的作品,拓展并强化了江湖的表意功能,体现出武侠小说的民间立场和它与世俗社会的内在关联.     

Empirical Performance of Covariates in Education Observational Studies

This article summarizes results from 12 empirical evaluations of observational methods in education contexts. We look at the performance of three common covariate-types in observational studies where the outcome is a standardized reading or math test. They are: pretest measures, local geographic matching, and rich covariate sets with a strong theory of treatment selection. Overall, the review demonstrates that although the pretest often reduces bias in observational studies, it does not always eliminate it. Its performance depends on the pretest's correlation with treatment selection and the outcome, and whether preintervention trends are present. We also find that although local comparisons are prioritized for matching, its performance depends on whether comparable no-treatment cases are available. Otherwise, local comparisons may produce badly biased results. In cases where researchers have a strong theory of selection and rich covariate sets, observational methods perform well, but additional replication studies are needed. Finally, observational methods that rely on demographic covariates without a theory of selection rarely produce unbiased treatment effects. The article concludes by offering education researchers empirically based guidance on covariate selection in observational studies.     

Changing thoughts,changing practice: examining the delivery of a group CBT-based intervention in a school setting

Promoting mental health and well-being for children and young people in the UK has attracted increasing prominence in recent years and has been a focus for government strategy within health and education. Training and practice in educational psychology has increasingly focused on developing skills and expertise to provide therapeutic support within school contexts, at an early stage of need. One approach, Cognitive Behaviour Therapy (CBT), has been heralded as an effective, evidence-based intervention for anxiety. This research examines the factors influencing the outcomes of a group CBT-based intervention, run by an Educational Psychologist (EP), in a school setting. The findings suggest that influential variables included pupil identification, measures of change applied and the role of school staff. It is concluded that EPs can play a key role in increasing access to psychological therapies, alongside considering due caution in relation to the application of traditional clinical approaches in school contexts.     

从教学媒体看教育技术的发展

本文描述了20世纪以来教学媒体和教育技术的发展情况,并结合各时期的教学媒体理论阐明了教学媒体的发展规律以及教学媒体与教育技术的关系。