The role of objectives in guiding the organization of information learned from text     

Ellen D Gagné  Bruce K Britton 《Contemporary educational psychology》1982,7(1):15-25

This study was designed to identify how objectives influence the organization of the information recalled from text. Three hypotheses were investigated: (1) that objectives affect the sequence of attention to information in text, (2) that they affect the sequence in which information is rehearsed during a review period, or (3) that they serve as a set of cues at retrieval. One hundred college students read objectives either before or after reading a passage (varying the opportunity for objectives to affect the sequence of attention). They then either had or did not have a review period (varying the opportunity to use objectives to sequence rehearsal and also varying the presence of the objectives in memory at the time of retrieval). One hundred more students read the passage in control conditions with objectives available throughout the reading or with no objectives available. Results showed that students given objectives after reading but before a review period had more clustering by objectives in free recall than did those who never saw objectives, supporting the hypothesis that organization by objectives occurs during rehearsal. No evidence was found to support the notion that organization by objectives occurs during encoding or retrieval phases.  相似文献   

Interpretation of the separate WPPSI tests for boys and girls at three age levels     

Alan S. Kaufman  S.Feyisara Daramola  Robert F. DiCuio 《Contemporary educational psychology》1977,2(3):232-238

The aim was to aid the clinician's interpretation of the six Verbal and five Performance tests constituting the WPPSI. Analyses were conducted for separate groups of boys and girls at ages $\text{4?4}\text{1}\text{2}$, $\text{5?5}\text{1}\text{2}$, and $\text{6?6}\text{1}\text{2}$ to determine the amount of specificity (reliable unique variance) for each test. Test specificity provides empirical evidence either for or against interpreting the specific traits or abilities that are presumed to be measured by a particular test. Most WPPSI tests were found to have enough specificity to warrant specific clinical interpretation for boys and girls across the age range. The clinical implications of the results are discussed.  相似文献   

基于免疫遗传算法的高校运动会赛程编排问题研究与实现     

蒋尚亭 《合肥联合大学学报》2014,(1):40-43,58

随着信息化技术在高校的推广,我国部分高校已经开始利用计算机技术来进行高校运动会的管理,但赛程编排工作一直困扰着运动会管理人员,经过分析和研究提出一种基于免疫遗传算法的高校运动会赛程编排方法。免疫遗传算法将生物免疫原理引入到传统遗传算法中,通过接种疫苗来提高抗体的适应度,从而防止种群快速退化。最后通过相关实验说明免疫遗传算法与传统遗传算的性能差异,并利用免疫遗传算法来解决高校运动会赛程编排问题。  相似文献   

用改进的遗传算法实现语音特征矢量的矢量量化     

曾招华  景新幸  杨海燕 《大众科技》2011,(4):59-60

矢量量化作为一种数据压缩技术在语音识别中占有重要的地位,传统的LBG算法收敛速度快,但易陷入局部最优;而传统的遗传算法虽能得到全局最优码本,但收敛速度慢.文章结合它们各自的优点,对遗传算法进行改进,得到一种改进的码本设计方法.实验结果表明,提出的算法性能优于传统的遗传算法,不仅收敛速度快,而且失真测度小.  相似文献   

The relationship between reading level and retention in average and supra readers     

Richard L. Metzger  Linda Pambianco 《Contemporary educational psychology》1985,10(1):52-57

Research which indicates a relationship between reading level and memory has generally focused on the performance of average and delayed readers, leaving open the question of performance by above average (supra) readers. The present study considered the performance of average and supra readers on a partial report task with a variable interstimulus interval. The results demonstrated that the two groups do not differ when the interval is less than 200 ms, but the supra readers perform better when the interval extends beyond that point. The results are interpreted as supporting the concept of a continuous relationship between memory and reading level.  相似文献   

序列无约束极小化技术和遗传算法在非线性规划中的应用     

刘道建  黄天民 《绵阳师范学院学报》2002,(2)

提出了一种求解带约束非线性规划问题的一般方法。与现有的方法相比,它不受可导性、单峰性和是否病态等因素的限制,适用范围广。实例说明该算法对带约束非线性规划问题的求解十分有效。  相似文献   

Two-stage evolutionary algorithm for dynamic multicast routing in mesh network     

Li Zhu  Zhi-shu Li  Liang-yin Chen  Yan-hong Cheng 《浙江大学学报(A卷英文版)》2008,9(6):791-798

In order to share multimedia transmissions in mesh networks and optimize the utilization of network resources, this paper presents a Two-stage Evolutionary Algorithm （TEA）, i.e., unicast routing evolution and multicast path composition, for dynamic multicast routing. The TEA uses a novel link-duplicate-degree encoding, which can encode a multicast path in the link-duplicate-degree and decode the path as a link vector easily. A dynamic algorithm for adding nodes to or removing nodes from a multicast group and a repairing algorithm are also covered in this paper. As the TEA is based on global evaluation, the quality of the multicast path remains stabilized without degradation when multicast members change over time. Therefore, it is not necessary to rearrange the multicast path during the life cycle of the multicast sessions. Simulation results show that the TEA is efficient and convergent.  相似文献   

Parameters selection in gene selection using Gaussian kernel support vector machines by genetic algorithm   总被引：2，自引：0，他引：2  

Mao Y  Zhou XB  Pi DY  Sun YX  Wong ST 《Journal of Zhejiang University. Science. B》2005,6(10):961-973

INTRODUCTION Recent techniques based on oligonucleotide or cDNA microarrays allow the expression level of thousands of genes to be monitored in parallel (Golub et al., 1999). A critically important factor for cancer diagnosis and treatment is the reliable prediction of tumor progression. A remarkable advance for mo- lecular biology and for cancer research is cDNA mi- croarray technology. cDNA microarray datasets havea high dimensionality corresponding to the large number of genes monit…  相似文献   

基于学习遗忘作用的人员调度实验设计及其软件开发     

闫纪红  王子墨 《实验室研究与探索》2011,30(6):55-58,62

建立了学习遗忘作用与人员工效的关系模型。采用遗传算法进行调度求解,并在Matlab环境下完成了考虑学习遗忘作用的人员调度的软件开发,设计了相关实验,通过实验内容可以实现多任务人员的调度,并表明调度过程中的学习遗忘现象。通过对参数和约束条件的设置,模拟了不同生产类型,并产生人员在不同生产模式下的调度策略。  相似文献   

基于遗传算法的旅行商问题的研究     

崔瑾娟 《安阳师范学院学报》2012,(2):38-40

巡回旅行商问题(TSP)是一个组合优化方面的问题,已经成为测试组合优化新算法的标准问题。应用遗传算法解决TSP问题,首先对访问城市序列进行排列组合的方法编码,这保证了每个城市经过且只经过一次。接着生成初始种群,并计算适应度函数,即计算遍历所有城市的距离。然后用最优保存法确定选择算子,以保证优秀个体直接复制到下一代。采用有序交叉和倒置变异法确定交叉算子和变异算子。最后用MATLAB来实现算法,仿真后,观察路径,得出最终结果。  相似文献