认知建构视角下交互式信息检索模型研究   总被引：1，自引：0，他引：1  

刘萍  叶方倩  杨志伟 《图书情报知识》2020,(2):93-101,122

[目的/意义]信息检索本质上是一个认知过程,研究促进用户认知的交互式信息检索模型具有重要意义。[研究设计/方法]以建构主义理论为指导,以促进用户的认知发展为研究目标,构建了以信息空间层、用户空间层和界面交互层为顶层分析框架的交互式信息检索模型,并开发了原型系统。[结论/发现]实验结果表明原型系统能有效地促进用户对信息空间的探索与挖掘,帮助用户积极主动地进行认知建构,发展认知空间。[创新/价值]将认知建构理论运用于信息检索领域,从交互设计方面对检索系统提出了改进建议,以更好地提供认知支持。  相似文献   

基础设计教学方法探讨     

何光伟 《阿坝师范高等专科学校学报》2007,24(3):94-95

基础设计教育在整个艺术设计教学中占有核心地位,是高校培养优秀设计人才重要的教学环节。本文针对艺术设计基础教育提出了"点面"互动,以能力素质培养为发展目标的观点,利用真情实景的举例语言进行讲解,有利于启发学习者发散式的思维状态。并确立了以探讨性的学习方法为基本特征的课题设计方案。  相似文献   

Genetic analysis for brix weight per stool and its component traits in sugarcane （Saccharum officinarum）     

Liu GF  Zhou HK  Hu H  Zhu ZH  Hayat Y  Xu HM  Yang J 《Journal of Zhejiang University. Science. B》2007,8(12):860-866

Brix weight per stool (BW) of sugarcane is a complex trait, which is the final product of a combination of many components. Diallel cross experiments were conducted during a period of two years for BW and its five component traits, including stalk diameter (SD), stalk length (SL), stalk number (SN), stalk weight (SW), and brix scale (BS) of sugarcane. Phenotypic data of all the six traits were analyzed by mixed linear model and their phenotype variances were portioned into additive (A),dominance (D), additive×environment interaction (AE) and dominance×environment interaction (DE) effects, and the correlations of A, D, AE and DE effects between BW and its components were estimated. Conditional analysis was employed to investigate the contribution of the components traits to the variances of A, D, AE and DE effects of BW. It was observed that the heritabilities of BW were significantly attributed to A, D and DE by 23.9%, 30.9% and 28.5%, respectively. The variance of A effect for BW was significantly affected by SL, SN and BS by 25.3%, 93.7% and 17.4%, respectively. The variances of D and DE effects for BW were also significantly influenced by all the five components by 5.1%～85.5%. These determinants might be helpful in sugarcane breeding and provide valuable information for multiple-trait improvement of BW.  相似文献   

WOMBAT A tool for mixed model analyses in quantitative genetics by restricted maximum likelihood （REML）   总被引：31，自引：0，他引：31  

Meyer K 《Journal of Zhejiang University. Science. B》2007,8(11):815-821

WOMBAT is a software package for quantitative genetic analyses of continuous traits, fitting a linear, mixed model; estimates of covariance components and the resulting genetic parameters are obtained by restricted maximum likelihood. A wide range of models, comprising numerous traits, multiple fixed and random effects, selected genetic covariance structures, random regression models and reduced rank estimation are accommodated. WOMBAT employs up-to-date numerical and computational methods. Together with the use of efficient compilers, this generates fast executable programs, suitable for large scale analyses. Use of WOMBAT is illustrated for a bivariate analysis. The package consists of the executable program, available for LINUX and WINDOWS environments, manual and a set of worked example, and can be downloaded free of charge from http://agbu. une.edu.au/~kmeyer/wombat.html  相似文献   

Genetic analysis of fruit shape traits at different maturation stages in sponge gourd   总被引：5，自引：0，他引：5  

Zhang S  Hu J  Zhang CF  Guan YJ  Zhang Y 《Journal of Zhejiang University. Science. B》2007,8(5):338-344

The fruit shape is important quantitative trait closely related to the fruit quality. However, the genetic model of fruit shapes has not been proposed. Therefore, in the present study, analysis of genetic effects for fruit shape traits （fruit length and fruit perimeter） in sponge gourd was conducted by employing a developmental genetic model including fruit direct effects and maternal effects. Analysis approaches of unconditional and conditional variances were applied to evaluate the genetic behavior of fruit shape traits at economical and physiological maturation times. The results of variance analysis indicated that fruit length and fruit perimeter were simultaneously affected by fruit direct genetic effects and maternal effects. Fruit direct genetic effects were relatively more important for fruit shape traits at whole developmental period. The gene expression was most active at the economical maturation stage （1-12 d after flowering） for two shape traits, and the activation of gene was mostly due to direct dominance effects at physiological maturation stage （13-60 datter flowering）. The coefficients due to different genetic effects, as well as the phenotypic correlation coefficients, varied significantly between fruit shape traits themselves at various maturation stages. The results showed that it was relatively easy to improve fruit shape traits for industrial purpose by carefully selecting the parents at economical maturation stage instead of that at physiological maturation stage.  相似文献   

基于遗传算法求解TSP问题的算法设计   总被引：2，自引：0，他引：2  

张春霞  王蕊 《安阳工学院学报》2007,(4):57-60

TSP是一个典型的组合优化问题,并且是一个NP难题,其可能的路径总数与城市数目n是成指数型增长的,所以一般很难精确地求出其最优解,因而寻找出有效的近似求解算法就具有重要的意义.现提出一种求解TSP问题比较有效的遗传算法,从其数学模型、遗传算子、评估函数、种群多样性等方面对算法进行了分析,结果表明提出的算法在求解TSP问题上是有效的.  相似文献   

基础阶段英语交际能力培养模式初探——浅谈"6R"互动语言教学法     

王怡 《苏州教育学院学报》2007,24(2):85-87

互动语言教学法能够为学习者创造有意义的语境,从而有助于学习者更好地掌握词汇语法、激发他们内在的学习动力以及培养他们的自主学习能力.互动语言教学法在教学实践中可以归结为1个"W"(Warm-up)和6个"R"(Reading,Responsive work,Role playing,Reward,Report,Revision).  相似文献   

新论学校与社区的良性互动     

刘莉 《中学教育》2011,(6):80-85

伴随《国家中长期教育改革和发展规划纲要（2010-2020年）》的颁布,推进学校与社区的良性互动再度成为关注的焦点。学校与社区的关系常被概括为抵消型、补偿型、沟通型,二者密切的联系不可忽视,构建良性互动的学校和社区关系成为必要。教育为生活、开放、完整和发展的教育等理念是其构建的原动力,只有形成合力才能促进教育的发展。已...  相似文献   

亲师互动现状调查分析     

郝翌钧  郝若平 《教育理论与实践》2011,(30)

通过对家长和教师亲师互动的现状进行调查,结果表明:(1)家长亲师互动整体水平最好的是策略互动,其次为认知互动,最后为情感互动。而教师亲师互动中最好的是情感互动,其次为认知互动,最后为策略互动。(2)家长亲师互动在性别上只有认知维度存在显著差异,女性更好;在文化程度上除策略维度没有差异外,认知维度和情感维度均存在显著差异。  相似文献   

“主辅互动”两渠道,“参转结合”三途径——大学生思想政治教育工作范式解析     

黄玲丽 《宜春学院学报》2011,33(6)

大学生思想政治教育工作是一项“基础工程”、“民心工程”、“希望工程”和“社会工程”.在大学生思想政治教育实践中,第一、二课堂应是大学生思想政治教育的主、辅渠道,应采取有力、有效措施推动“主辅渠道”互动;学校、教师、学生三种主体,即大学生思想政治教育的组织主体、教育主体、接受主体,推行三种主体不同的三种参与方式,实现大学生思想政治教育的三种优良转化.  相似文献