论高校网络德育实效评估的原则与路径

高校网络德育评估是高校网络德育的重要组成部分.高校网络德育评估必须遵循层次性评估与整体性评估相结合、短期效果评估与中长期效果评估相结合等构建原则,依据评估程序,运用主观性定性、面向对象等评估方法,以促进高校网络德育的实效性.     

现代信息技术在职业教育实训教学中的应用

本文以汽车维修与检测专业为例,阐述了现代信息技术在职业教育实训教学中应用的必要性。     

论歌唱的激情与情感的控制

歌唱表演的激情是一种充满活力的积极情绪,这种情感能使表演者的想象力、创造力和形象思维得到充分的展示,能赋予作品新的生命和更为丰富的内涵。演唱者较强的情绪控制能力,能使歌唱的激情与发声技巧协调统一,使欣赏者获得新的艺术感受,达到完美的艺术效果。     

Complementary feeding patterns among ethnic groups in rural western China

Objective

This study investigated complementary feeding practices among four ethnic groups (Han, Uygur, Tibetan, and Zhuang) based on a cross-sectional survey in rural western China.

Methods

In 2005, a stratified multistage cluster random sampling method was used to recruit 9712 children (7411 Han, 1032 Uygur, 678 Tibetan, and 591 Zhuang) between 6 and 35 months of age and their mothers from 45 counties in 10 provinces (autonomous regions, municipalities) in western China.

Results

The rates of early introduction (before 6 months) of complementary foods in four ethnic groups (Han, Uygur, Tibetan, and Zhuang) were 71.30%, 95.95%, 82.40%, and 72.30%, respectively. The Infant and Child Feeding Index (ICFI) for Uygur and Tibetan children was lower than that for Han children at all age groups. Uygur children were more likely to have unqualified ICFI compared with Han children in a multivariate logistic regression (odds ratio (OR)=5.138, 95% confidence interval (CI): 4.340–6.084). A higher level of maternal education, greater family wealth, and the availability of complementary feeding educational materials decreased the likelihood of an unqualified ICFI. The nutritional status of children (Han, Tibetan, and Zhuang) with qualified ICFI was better than that for children with unqualified ICFI.

Conclusions

Appropriate interventions are required to improve complementary feeding practices in rural western China.

     

短路教学"四步曲"

电学知识是初中物理教学的重点和难点,在许多习题中都要求学生能正确识别电路类型,会分析用电器的工作情况.浏览各地的中考试题也不难发现最后压轴计算题中,常有分析电路结构、画出等效电路图、求解计算这一类的题目.     

Enhancing cellular immune response to HBV M DNA vaccine in mice by codelivery of interleukin-18 recombinant

Objective: To investigate the effect of interleukin-18 (IL-18) on immune response induced by plasmid encoding hepatitis B virus middle protein antigen and to explore new strategies for prophylactic and therapeutic HBV DNA vaccines. Methods: BALB/c mice were immunized with pCMV-M alone or co-immunized with pcDNA3-18 and pCMV-M and then their sera were collected for analysing anti-HBsAg antibody by ELISA; splenocytes were isolated for detecting specific CTL response and cytokine assay in vitro. Results: The anti-HBs antibody level of mice co-immunized with pcDNA3-18 and pCMV-M was slightly higher than that of mice immunized with pCMV-M alone, but there was not significantly different (P>0.05). Compared with mice injected with pCMV-M, the specific CTL cytotoxity activity of mice immunized with pcDNA3-18 and pCMV-M was significantly enhanced (P<0.05) and the level of IFN-γ in supernatant of splenocytes cultured with HBsAg in vitro was significantly elevated (P<0.05) while the level of IL-4 had no significant difference (P>0.05). Conclusion: The plasmid encoding IL-18 together with HBV M gene DNA vaccines may enhance specific TH1 cells and CTL cellular immune response induced in mice, so that IL-18 is a promising immune adjuvant.     

在线课程质量观和质量要素的质性研究--基于专家、实践者和学习者的视角

本文采用扎根理论研究方法,通过对学术专家、实践者和学习者三类相关群体的访谈,调查高等教育和继续教育在线课程相关人群关于在线课程的质量观与对质量构成的认识,探索在线课程质量框架与要素,以期为促进人们对在线课程质量的共识,为改进和优化现有在线课程质量标准提供参考。研究通过对20位受访者累计22万字访谈文本的编码分析,发现四种质量观--服务质量观、系统性质量观、目标性质量观和增值性质量观,并定义出设计开发与实施运行两大类的九个在线课程质量要素--课程目标、课程内容、学习过程、学习支持服务、学习评价、媒体与技术环境、实施效果、改进发展和社会影响。其中,课程目标、学习内容与实施效果被定义为核心要素。本文基于TF-IDF关键词统计方法对三类群体的在线课程质量观差异进行了分析,并结合已有远程教育质量观和在线课程质量标准相关成果对本研究发现和定义的在线课程质量观、质量框架和质量要素进行了讨论与反思。     

自我价值保护与小学生的成败归因

人们常对自己的成败进行归因。早在1976年，斯奈德等是学家就通过研究发现，人们倾向于将成功解释为自由身内在的一些因素所造成；而将失败归因于外部因素。即人们的归因受到自我价值保护的影响。本研究是通过问卷 形式对小学生的学业成绩进行归因，以期了解社会性发民菜并不成熟的未成年人是否也存在此种现象，并最终证明归因受到自我价值保护这种现象在小学中已产生了萌芽，其产生早晚与表现强弱和儿童的社会性发展密切相关。     

论党的三代领导集体对民主集中制建设的探索

中国共产党自成立以来,对民主集中制建设进行了坚持不懈的探索。坚持民主集中制原则中国化的方向,是党的三代领导集体在不同的历史条件下不断发展这一原则的宝贵经验,也是我们按照“三个代表”的要求,加强民主集中制建设必须遵循的根本原则。     

Pyramid Linear Prediction Coding for Images

lintroductionCompressionofdigitalimagesandvideosignalstoreducetheirstorageandtransmissionbandwidthrequirementsisofgreatinterestintheimplementationofcolnnlunicationsystems.Moreandmorecompressioncodingmethod$fordigitalimagesandvideosignalshavebeenproposedto…